1. The document describes a 1957 British patent for improvements to refrigerators relating to maintaining humidity in the food storage compartment.
2. It discloses a receptacle containing a water supply and heating element located in the food storage compartment to evaporate water and increase humidity.
3. The receptacle is periodically refilled using water from defrosting of the cooling unit, with various arrangements described for controlling the heating element to maintain a satisfactory degree of humidity.
This document describes a 1957 patent for a metal piston with an applied porous organic material layer. The layer, which can be wood or synthetic resin-impregnated materials and is less than 2mm thick, addresses the disadvantage of other organic piston materials which have high expansion coefficients compared to metals. The layer allows for smooth running of the piston without the need for abundant lubrication, preventing contamination of working gases in applications like gas compressors and hot-gas engines. An example refrigerator piston is described with a 0.5mm wood layer applied to its displacer body, leaving a narrow gap for operation without piston rings.
The document describes a process and apparatus for photographically recording televised images from a cathode ray tube onto unexposed motion picture film. It discusses using intermittent motion of the film rather than continuous motion to allow longer exposure periods that can capture the afterglow of the fluorescent screen. It also describes using a system to divert, delay, and reproduce selected images to provide time for film shifting between exposures while ensuring the whole television image is recorded on the film.
This document describes a patent for improvements to food mixers. It discloses a mixer with an elongated spinner shaft that carries a spinner on one end and connects detachably to the power take-off of the mixer on the other end. A stationary guide receives and steadies the spinner shaft near the spinner to prevent whipping. The spinner shaft connects to the power take-off shaft through a longitudinally movable connector urged away by a spring to form a combined journal and thrust bearing and running seal.
This patent document describes improvements to shaft bearings that provide lubrication regardless of motor position or rotation direction. The bearing features a journal sleeve and thrust members, with annular wicks that absorb lubricant and preload the thrust surfaces to prevent noise. Helical grooves in the shaft pump lubricant between the wicks to lubricate the journal and thrust surfaces, with means to return excess lubricant to ensure adequate supply in any conditions.
This document describes British patent GB780011 (A) for improvements to water softening devices. Specifically, it describes a water softening device that uses a cation exchange process and incorporates a cartridge containing the softening medium. The cartridge is detachably mounted to a frame-like structure that can be fixed to a wall. The device is designed to be lower cost than previous water softening equipment in order to be used in conjunction with water heaters.
This document describes improvements to measuring instruments and gauges patented by Marconi's Wireless Telegraph Company in 1957. It details an instrument that uses at least one semiconductor photojunction to measure the thickness of a specimen by projecting a light pattern and measuring changes in current flow through the junction as the distance between the light and junction interface is varied by the thickness of the inserted specimen. The instrument allows for very precise thickness measurements and has applications in measuring wafers and sheets.
This document provides details of an injection molding machine, including:
- The machine uses tie rods to connect fixed and movable mold plates, with hydraulic cylinders to move the plates and inject material.
- It has a movable platen that supports a mold piece, and hydraulic pistons to move the platen towards a fixed platen holding the other mold piece.
- Additional hydraulic systems apply very high pressure to the movable platen for the final closing of the molds.
1) The document describes a method for protecting fire extinguishers from corrosion by applying a coating to the interior of the extinguisher body.
2) The coating is produced by mixing equal parts of distilled bitumen and air blown bitumen, heating the mixture, and applying it to the pre-heated interior walls of the extinguisher body.
3) The bitumen coating provides a durable, waterproof layer that prevents corrosion even if the metal body is bent, and remains effective over prolonged use.
This document describes a 1957 patent for a metal piston with an applied porous organic material layer. The layer, which can be wood or synthetic resin-impregnated materials and is less than 2mm thick, addresses the disadvantage of other organic piston materials which have high expansion coefficients compared to metals. The layer allows for smooth running of the piston without the need for abundant lubrication, preventing contamination of working gases in applications like gas compressors and hot-gas engines. An example refrigerator piston is described with a 0.5mm wood layer applied to its displacer body, leaving a narrow gap for operation without piston rings.
The document describes a process and apparatus for photographically recording televised images from a cathode ray tube onto unexposed motion picture film. It discusses using intermittent motion of the film rather than continuous motion to allow longer exposure periods that can capture the afterglow of the fluorescent screen. It also describes using a system to divert, delay, and reproduce selected images to provide time for film shifting between exposures while ensuring the whole television image is recorded on the film.
This document describes a patent for improvements to food mixers. It discloses a mixer with an elongated spinner shaft that carries a spinner on one end and connects detachably to the power take-off of the mixer on the other end. A stationary guide receives and steadies the spinner shaft near the spinner to prevent whipping. The spinner shaft connects to the power take-off shaft through a longitudinally movable connector urged away by a spring to form a combined journal and thrust bearing and running seal.
This patent document describes improvements to shaft bearings that provide lubrication regardless of motor position or rotation direction. The bearing features a journal sleeve and thrust members, with annular wicks that absorb lubricant and preload the thrust surfaces to prevent noise. Helical grooves in the shaft pump lubricant between the wicks to lubricate the journal and thrust surfaces, with means to return excess lubricant to ensure adequate supply in any conditions.
This document describes British patent GB780011 (A) for improvements to water softening devices. Specifically, it describes a water softening device that uses a cation exchange process and incorporates a cartridge containing the softening medium. The cartridge is detachably mounted to a frame-like structure that can be fixed to a wall. The device is designed to be lower cost than previous water softening equipment in order to be used in conjunction with water heaters.
This document describes improvements to measuring instruments and gauges patented by Marconi's Wireless Telegraph Company in 1957. It details an instrument that uses at least one semiconductor photojunction to measure the thickness of a specimen by projecting a light pattern and measuring changes in current flow through the junction as the distance between the light and junction interface is varied by the thickness of the inserted specimen. The instrument allows for very precise thickness measurements and has applications in measuring wafers and sheets.
This document provides details of an injection molding machine, including:
- The machine uses tie rods to connect fixed and movable mold plates, with hydraulic cylinders to move the plates and inject material.
- It has a movable platen that supports a mold piece, and hydraulic pistons to move the platen towards a fixed platen holding the other mold piece.
- Additional hydraulic systems apply very high pressure to the movable platen for the final closing of the molds.
1) The document describes a method for protecting fire extinguishers from corrosion by applying a coating to the interior of the extinguisher body.
2) The coating is produced by mixing equal parts of distilled bitumen and air blown bitumen, heating the mixture, and applying it to the pre-heated interior walls of the extinguisher body.
3) The bitumen coating provides a durable, waterproof layer that prevents corrosion even if the metal body is bent, and remains effective over prolonged use.
This document describes a powder dispensing device that can be attached to a powder container like a detergent carton. The dispensing device has an inlet and outlet aperture and an internal zig-zag passageway. Powder passes through the passageway from the inlet to the outlet each time the container is tipped, dispensing a uniform amount of powder. The device is made of a material like cardboard and can be constructed from a single blank that is folded into shape.
This document describes a filtering liner that can be placed in the barrel of an extrusion machine. The liner has longitudinal grooves on its outer surface connected to its interior by holes. It filters out large plastic lumps and increases friction to further melt the plastic as it is forced through the small holes and along the grooves. The liner extends over at least one-third the distance between the die and furthest point of the screw or ram and helps efficiently heat and filter the plastic material before it exits through the die.
This patent document describes improvements to roll-film photographic cameras that allow for double exposures. Specifically, it describes a camera with a rotatable operating member that can selectively couple or uncouple the shutter winding and film transport mechanisms. It also includes a locking device that prevents movement of the shutter winding mechanism when the film transport mechanism is uncoupled after an incomplete film feed, addressing limitations of the prior design.
This document summarizes a patent for improvements in the manufacture of viscose. Specifically, it describes an apparatus that uses a rotating perforated plate and roller to break up lumps of cellulose xanthate in a slurry with caustic soda solution. The lumps are deposited on the plate and squeezed through the perforations by the roller to more finely divide the cellulose xanthate. This facilitates faster dissolution and yields viscose free of lumps. Diagrams of the apparatus are provided showing its components and operation.
This document provides a patent specification from 1957 for improvements relating to the inversion of television signals. Specifically, it describes a circuit using a variable-mu pentode that can derive a positive signal from a negative motion picture film, or vice versa. The circuit takes advantage of the non-linear characteristics of a variable-mu pentode to approximate the negative power law required to correctly invert the signals in a way that produces acceptable pictures without compression artifacts.
This document describes a starting switch for internal combustion engines comprising electrical contacts in a housing and a rotor mounted in the housing. The rotor is operatively connected to an actuating shaft to close the contacts. A suction responsive ball is adapted to move to an effective position by engine suction to block rotation of the rotor and prevent closing of the contacts after the engine starts. The starting switch utilizes a spherical suction responsive member and provides initial positive actuation of the member to keep it from sticking, making the switch self-cleaning and unaffected by dirt or impurities.
This document describes a device for rapidly braking two-stroke internal combustion engines that can operate in reversible directions. The device uses two contact breakers associated with different rotational directions. When the ignition switch is changed to the opposite direction, one contact breaker will open shortly before top dead center to provide an ignition spark, braking the engine. This allows the starting motor to be reversed without heavy loading before the engine fully stops.
This document describes a patent for an improved rear rifle sight. The sight has adjustable scales to show the position of the sighting aperture. The scales can be moved independently of the adjusting mechanism and locked into the zero position after the sight has been calibrated to the rifle. This allows the rifleman to accurately set the zero without having to mentally account for the offset introduced during calibration.
1. This document describes a 1957 British patent for a two-way radio link between a guided object like a missile and a guiding source like an aircraft.
2. The radio link uses a single carrier frequency and allows transmission of guidance signals from the missile to the aircraft and control signals from the aircraft to the missile by switching between transmission and reception during intervals in the guidance signals.
3. Synchronization signals embedded in the guidance signals are used to control switches that alternate the radio link between transmitting the guidance signals and receiving the control signals.
The document describes a method for producing edible food products from peanuts. The key steps involve cleaning peanut kernels to remove skins and foreign matter, pressing the kernels using an expeller process to extract oil while avoiding excessive heating, grinding the resulting cake into a fine powder, and roasting the powder to reagglomerate it into granules and improve flavor. Nutrients can be added to produce a balanced food product.
This document is a patent application for an improved air or gas cooler. The cooler has tubes through which cooling water flows and over which compressed air or gas flows. Traditionally, secondary heat conducting surfaces like fins or discs along the full length of the tubes could accumulate oil or other contaminants near the inlet, requiring troublesome cleaning. The improved cooler has secondary surfaces only on the portion of each tube between the inlet baffle and outlet end, reducing accumulation in hard to clean areas near the inlet. The cooler uses baffles to direct airflow in a zigzag pattern over the finned tube sections for efficient cooling before the air exits through the outlet.
The document describes a water heater appliance that includes a boiler, companion water heater with a hot water storage tank, and a controller. The controller controls the boiler based on temperature sensors at the upper and lower portions of the storage tank. If both the upper and lower temperatures are below a set point, the boiler is controlled to heat the water above the set point for quick heating. If the upper temperature is above the set point but the lower is below, the boiler is controlled to heat the water only to the set point for slower heating. This allows the appliance to provide both quick peak heating and slower steady-state heating efficiency.
This document describes a patent for a method of conditioning web-like materials in a closed chamber using a gaseous medium containing water vapor. The method involves dividing the conditioning process into separate treatment steps where the material is cooled between steps. The relative humidity is successively increased in each step. This allows for more even moisture distribution compared to previous single-step methods. Diagrams and figures show the multi-step apparatus used to perform this conditioning process.
To assess the performance of the vapor compression cycle as a refrigerator and as a heat pump and its dependence on various parameters. To learn how to use the equipment to measure temperatures at various test points and the flow rates for liquids and gases.
Iaii 9 transferencia de calor en estado no estacionarioJulio Tirado
The document discusses heat transfer in non-steady state conditions. It defines conduction as the transport of heat between molecules due to a temperature difference. Steady-state conduction occurs when heat transfer is constant and homogeneous over time. In non-steady state conduction, the temperature distribution in a body depends on location and time. The thermal conductivity of a material indicates how well it conducts heat from one point to another. The evolution of temperature over time is given by the heat diffusion equation.
The document discusses waste heat recovery from a domestic refrigerator. It describes how a waste heat recovery system was designed and retrofitted to the refrigerator in order to capture waste heat from the condenser. The waste heat is then used to keep food warm in an insulated oven attachment and to heat water. This saves significant amounts of energy by reusing heat that would otherwise be lost to the environment. The document also provides background on refrigeration systems, outlining the basic vapor compression cycle used in refrigerators and how each component functions to produce cooling.
Thermal Analysis of Clay Pot in Pot RefrigeratorIJMER
Cooling through evaporation is an ancient effective method of lowering temperature. The simple clay pot refrigerator is ideally suited for preserving vegetarian food and water in hot and dry climates. The refrigeration takes place by evaporation through the porous pot material. The present work includes experimental analysis of a clay pot in pot by varying height of water in the inner pot, by varying water level in the annulus of two pots and by subjecting the pot in pot refrigerator for free and forced convection. Results obtained from experimental analysis shows that Temperature T1 is highest when inner
pot is filled with 5.5litres of water and lowest when it is filled with 1.5 litres of water. Temperature T1 decreases by increasing water level in the annulus of two pots and rate of cooling is lowest when pot in pot refrigerator is subjected to free convection and highest when it is subjected to forced convection.
design and development of portable ripening chamberAjit Saruk
This document describes the design and development of a refrigerated fruit ripening chamber. It aims to minimize fruit waste that occurs due to improper ripening methods, exposure to sunlight, and loss of water from fruits. The design focuses on ripening bananas, which require temperatures of 15-18°C. The ripening chamber avoids water loss and minimizes weight loss, increasing the lifespan of bananas by 7-10 days. Key components of the design include a refrigeration system using R134a refrigerant, an evaporator coil, insulation, temperature controller, and controlled release of ethylene gas to stimulate ripening. The system is intended to allow retailers to directly source ripe bananas from farmers at a lower cost than traditional methods.
The document discusses how a refrigerator works through a refrigeration cycle process. It begins with refrigerant being compressed in the compressor and becoming a hot gas. This hot gas is then pushed into condenser coils where it exchanges heat with the incoming room air and becomes a liquid. The liquid refrigerant then cools down as it flows into evaporator coils inside the fridge where it absorbs heat, cooling the air. The refrigerant evaporates back into a gas and flows to the compressor to repeat the cycle, maintaining a constant cool temperature inside the refrigerator. The repeated refrigeration cycle uses changes in refrigerant state and pressure differences to transfer heat out of the refrigerator.
Experimental Investigation of a Household Refrigerator Using Evaporative-Cool...inventy
The objective of this paper was to investigate experimentally the effect of Evaporative-cooled condenser in a household refrigerator. The experiment was done using HCF134a as the refrigerant. The performance of the household refrigerator with air-cooled and Evaporative-cooled condenser was compared for different load conditions. The results indicate that the refrigerator performance had improved when evaporative-cooled condenser was used instead of air-cooled condenser on all load conditions. Evaporativecooled condenser reduced the energy consumption when compared with the air-cooled condenser. There was also an enhancement in coefficient of performance (COP) when evaporative-cooled condenser was used instead of air-cooled condenser. The Evaporative cooled heat exchanger was designed and the system was modified by retrofitting it, instead of the conventional air-cooled condenser by making drop wise condensation using water and forced circulation over the condenser. From the experimental analysis it is observed that the COP of evaporative cooled system increased by 13.44% compared to that of air cooled system. So the overall efficiency and refrigerating effect is increased. In minimum constructional, maintenance and running cost, the system is much useful for domestic purpose. This study also revealed that combining a evaporative cooled system along with conventional water cooled system under the condition that the defrost water obtained from the freezer is used for drop wise condensation over condenser and water cooled condensation of the condenser at the bottom using remaining defrost water would reduce the power consumption, work done and hence further increase in refrigerating effect of the system. The study has shown that such a system is technically feasible and economically viable
IRJET- Review on Comparative Analysis of COP of Vapour Compression Refrig...IRJET Journal
This document reviews the comparative analysis of the coefficient of performance (COP) of vapor compression refrigeration systems using different refrigerants. It analyzes the COP of systems using R134a, R407c, and R410a refrigerants. R134a is commonly used but harms the environment, while R407c and R410a are eco-friendly alternatives. The COP varies with evaporating temperature for each refrigerant. The document aims to determine the best refrigerant option based on performance and environmental impact. It provides background on vapor compression refrigeration systems and their basic components, including the compressor, condenser, expansion valve, and evaporator.
This document describes a powder dispensing device that can be attached to a powder container like a detergent carton. The dispensing device has an inlet and outlet aperture and an internal zig-zag passageway. Powder passes through the passageway from the inlet to the outlet each time the container is tipped, dispensing a uniform amount of powder. The device is made of a material like cardboard and can be constructed from a single blank that is folded into shape.
This document describes a filtering liner that can be placed in the barrel of an extrusion machine. The liner has longitudinal grooves on its outer surface connected to its interior by holes. It filters out large plastic lumps and increases friction to further melt the plastic as it is forced through the small holes and along the grooves. The liner extends over at least one-third the distance between the die and furthest point of the screw or ram and helps efficiently heat and filter the plastic material before it exits through the die.
This patent document describes improvements to roll-film photographic cameras that allow for double exposures. Specifically, it describes a camera with a rotatable operating member that can selectively couple or uncouple the shutter winding and film transport mechanisms. It also includes a locking device that prevents movement of the shutter winding mechanism when the film transport mechanism is uncoupled after an incomplete film feed, addressing limitations of the prior design.
This document summarizes a patent for improvements in the manufacture of viscose. Specifically, it describes an apparatus that uses a rotating perforated plate and roller to break up lumps of cellulose xanthate in a slurry with caustic soda solution. The lumps are deposited on the plate and squeezed through the perforations by the roller to more finely divide the cellulose xanthate. This facilitates faster dissolution and yields viscose free of lumps. Diagrams of the apparatus are provided showing its components and operation.
This document provides a patent specification from 1957 for improvements relating to the inversion of television signals. Specifically, it describes a circuit using a variable-mu pentode that can derive a positive signal from a negative motion picture film, or vice versa. The circuit takes advantage of the non-linear characteristics of a variable-mu pentode to approximate the negative power law required to correctly invert the signals in a way that produces acceptable pictures without compression artifacts.
This document describes a starting switch for internal combustion engines comprising electrical contacts in a housing and a rotor mounted in the housing. The rotor is operatively connected to an actuating shaft to close the contacts. A suction responsive ball is adapted to move to an effective position by engine suction to block rotation of the rotor and prevent closing of the contacts after the engine starts. The starting switch utilizes a spherical suction responsive member and provides initial positive actuation of the member to keep it from sticking, making the switch self-cleaning and unaffected by dirt or impurities.
This document describes a device for rapidly braking two-stroke internal combustion engines that can operate in reversible directions. The device uses two contact breakers associated with different rotational directions. When the ignition switch is changed to the opposite direction, one contact breaker will open shortly before top dead center to provide an ignition spark, braking the engine. This allows the starting motor to be reversed without heavy loading before the engine fully stops.
This document describes a patent for an improved rear rifle sight. The sight has adjustable scales to show the position of the sighting aperture. The scales can be moved independently of the adjusting mechanism and locked into the zero position after the sight has been calibrated to the rifle. This allows the rifleman to accurately set the zero without having to mentally account for the offset introduced during calibration.
1. This document describes a 1957 British patent for a two-way radio link between a guided object like a missile and a guiding source like an aircraft.
2. The radio link uses a single carrier frequency and allows transmission of guidance signals from the missile to the aircraft and control signals from the aircraft to the missile by switching between transmission and reception during intervals in the guidance signals.
3. Synchronization signals embedded in the guidance signals are used to control switches that alternate the radio link between transmitting the guidance signals and receiving the control signals.
The document describes a method for producing edible food products from peanuts. The key steps involve cleaning peanut kernels to remove skins and foreign matter, pressing the kernels using an expeller process to extract oil while avoiding excessive heating, grinding the resulting cake into a fine powder, and roasting the powder to reagglomerate it into granules and improve flavor. Nutrients can be added to produce a balanced food product.
This document is a patent application for an improved air or gas cooler. The cooler has tubes through which cooling water flows and over which compressed air or gas flows. Traditionally, secondary heat conducting surfaces like fins or discs along the full length of the tubes could accumulate oil or other contaminants near the inlet, requiring troublesome cleaning. The improved cooler has secondary surfaces only on the portion of each tube between the inlet baffle and outlet end, reducing accumulation in hard to clean areas near the inlet. The cooler uses baffles to direct airflow in a zigzag pattern over the finned tube sections for efficient cooling before the air exits through the outlet.
The document describes a water heater appliance that includes a boiler, companion water heater with a hot water storage tank, and a controller. The controller controls the boiler based on temperature sensors at the upper and lower portions of the storage tank. If both the upper and lower temperatures are below a set point, the boiler is controlled to heat the water above the set point for quick heating. If the upper temperature is above the set point but the lower is below, the boiler is controlled to heat the water only to the set point for slower heating. This allows the appliance to provide both quick peak heating and slower steady-state heating efficiency.
This document describes a patent for a method of conditioning web-like materials in a closed chamber using a gaseous medium containing water vapor. The method involves dividing the conditioning process into separate treatment steps where the material is cooled between steps. The relative humidity is successively increased in each step. This allows for more even moisture distribution compared to previous single-step methods. Diagrams and figures show the multi-step apparatus used to perform this conditioning process.
To assess the performance of the vapor compression cycle as a refrigerator and as a heat pump and its dependence on various parameters. To learn how to use the equipment to measure temperatures at various test points and the flow rates for liquids and gases.
Iaii 9 transferencia de calor en estado no estacionarioJulio Tirado
The document discusses heat transfer in non-steady state conditions. It defines conduction as the transport of heat between molecules due to a temperature difference. Steady-state conduction occurs when heat transfer is constant and homogeneous over time. In non-steady state conduction, the temperature distribution in a body depends on location and time. The thermal conductivity of a material indicates how well it conducts heat from one point to another. The evolution of temperature over time is given by the heat diffusion equation.
The document discusses waste heat recovery from a domestic refrigerator. It describes how a waste heat recovery system was designed and retrofitted to the refrigerator in order to capture waste heat from the condenser. The waste heat is then used to keep food warm in an insulated oven attachment and to heat water. This saves significant amounts of energy by reusing heat that would otherwise be lost to the environment. The document also provides background on refrigeration systems, outlining the basic vapor compression cycle used in refrigerators and how each component functions to produce cooling.
Thermal Analysis of Clay Pot in Pot RefrigeratorIJMER
Cooling through evaporation is an ancient effective method of lowering temperature. The simple clay pot refrigerator is ideally suited for preserving vegetarian food and water in hot and dry climates. The refrigeration takes place by evaporation through the porous pot material. The present work includes experimental analysis of a clay pot in pot by varying height of water in the inner pot, by varying water level in the annulus of two pots and by subjecting the pot in pot refrigerator for free and forced convection. Results obtained from experimental analysis shows that Temperature T1 is highest when inner
pot is filled with 5.5litres of water and lowest when it is filled with 1.5 litres of water. Temperature T1 decreases by increasing water level in the annulus of two pots and rate of cooling is lowest when pot in pot refrigerator is subjected to free convection and highest when it is subjected to forced convection.
design and development of portable ripening chamberAjit Saruk
This document describes the design and development of a refrigerated fruit ripening chamber. It aims to minimize fruit waste that occurs due to improper ripening methods, exposure to sunlight, and loss of water from fruits. The design focuses on ripening bananas, which require temperatures of 15-18°C. The ripening chamber avoids water loss and minimizes weight loss, increasing the lifespan of bananas by 7-10 days. Key components of the design include a refrigeration system using R134a refrigerant, an evaporator coil, insulation, temperature controller, and controlled release of ethylene gas to stimulate ripening. The system is intended to allow retailers to directly source ripe bananas from farmers at a lower cost than traditional methods.
The document discusses how a refrigerator works through a refrigeration cycle process. It begins with refrigerant being compressed in the compressor and becoming a hot gas. This hot gas is then pushed into condenser coils where it exchanges heat with the incoming room air and becomes a liquid. The liquid refrigerant then cools down as it flows into evaporator coils inside the fridge where it absorbs heat, cooling the air. The refrigerant evaporates back into a gas and flows to the compressor to repeat the cycle, maintaining a constant cool temperature inside the refrigerator. The repeated refrigeration cycle uses changes in refrigerant state and pressure differences to transfer heat out of the refrigerator.
Experimental Investigation of a Household Refrigerator Using Evaporative-Cool...inventy
The objective of this paper was to investigate experimentally the effect of Evaporative-cooled condenser in a household refrigerator. The experiment was done using HCF134a as the refrigerant. The performance of the household refrigerator with air-cooled and Evaporative-cooled condenser was compared for different load conditions. The results indicate that the refrigerator performance had improved when evaporative-cooled condenser was used instead of air-cooled condenser on all load conditions. Evaporativecooled condenser reduced the energy consumption when compared with the air-cooled condenser. There was also an enhancement in coefficient of performance (COP) when evaporative-cooled condenser was used instead of air-cooled condenser. The Evaporative cooled heat exchanger was designed and the system was modified by retrofitting it, instead of the conventional air-cooled condenser by making drop wise condensation using water and forced circulation over the condenser. From the experimental analysis it is observed that the COP of evaporative cooled system increased by 13.44% compared to that of air cooled system. So the overall efficiency and refrigerating effect is increased. In minimum constructional, maintenance and running cost, the system is much useful for domestic purpose. This study also revealed that combining a evaporative cooled system along with conventional water cooled system under the condition that the defrost water obtained from the freezer is used for drop wise condensation over condenser and water cooled condensation of the condenser at the bottom using remaining defrost water would reduce the power consumption, work done and hence further increase in refrigerating effect of the system. The study has shown that such a system is technically feasible and economically viable
IRJET- Review on Comparative Analysis of COP of Vapour Compression Refrig...IRJET Journal
This document reviews the comparative analysis of the coefficient of performance (COP) of vapor compression refrigeration systems using different refrigerants. It analyzes the COP of systems using R134a, R407c, and R410a refrigerants. R134a is commonly used but harms the environment, while R407c and R410a are eco-friendly alternatives. The COP varies with evaporating temperature for each refrigerant. The document aims to determine the best refrigerant option based on performance and environmental impact. It provides background on vapor compression refrigeration systems and their basic components, including the compressor, condenser, expansion valve, and evaporator.
The document discusses refrigeration and refrigeration cycles. It provides details on:
1) The basic components and process of a refrigerator, which uses ammonia as a refrigerant to draw heat from the freezer and fridge compartments via a compression and evaporation cycle.
2) Refrigeration cycles in general work by using a refrigerant to move heat from one place to another through evaporation and condensation.
3) The vapor compression refrigeration cycle involves compressing, condensing, expanding, and evaporating stages to transfer heat from the evaporator to the condenser.
Mechanism of refrigerator asrafi tonmoy-diuAsrafi-Tonmoy
The document is a presentation slide about the mechanism of a refrigerator. It contains information on the main components of a refrigerator - compressor, condenser, evaporator, and throttling device. It explains how each component works and how they work together in the vapor compression refrigeration cycle. The cycle involves compressing a refrigerant into a high-pressure vapor, condensing it into a liquid in the condenser, thinning it through an expansion device to produce cold liquid, and evaporating it in the evaporator to absorb heat before repeating the cycle. The document also discusses accessories like fins and defrosting, and defines the coefficient of performance to evaluate refrigerator efficiency.
Performance Improvement of a Domestic Refrigerator Using Phase change Materia...IOSR Journals
This document summarizes a study that investigated using a phase change material (PCM) associated with the evaporator in a domestic refrigerator to improve its performance. Water was used as the PCM. Experimental results found that using PCM increased the refrigerator's coefficient of performance (COP) by an average of 18-26% compared to the conventional refrigerator without PCM. The PCM enhanced heat transfer from the evaporator to the refrigerant, improving the COP. Future work could explore different PCMs and their effects on refrigeration system performance.
The document discusses several projects related to self-heating and self-cooling packaging developed by Matthew Searle. It summarizes three key projects:
1) The Thermotic Can, a self-heating beverage container that could heat contents by 40°C in 3 minutes. It raised £6m in funding and had a successful test launch with Nestle.
2) Direct steam heating technology that uses steam to quickly heat food and beverages. Prototypes demonstrated heating items from 5°C to 70°C in 2-4 minutes.
3) The Chilly, a self-cooling water container developed for the US Navy that cools water progressively as it flows through without external
Research Inventy : International Journal of Engineering and Scienceinventy
esearch Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
This document provides an overview of freeze drying, including:
1) Freeze drying involves removing water from a frozen product through sublimation without passing through the liquid phase. This allows for stable products that do not require refrigeration.
2) The freeze drying process has three stages - prefreezing, primary drying where ice is removed through sublimation, and secondary drying to further reduce residual moisture.
3) Key factors that must be carefully controlled are product temperature, system pressure, and collector temperature to encourage sublimation and water vapor flow from the product. Maintaining the proper temperature balance is essential for a successful freeze drying process.
This document describes an air conditioning installation for rooms that comprises a fresh air receiver supplied with conditioned fresh air at pressure, expansion nozzles that expand the fresh air into a mixing chamber to mix with room air sucked in, and a heat exchanger to heat or cool the room air mixture before it flows into the room. The invention involves widening the free cross-section of the mixing chamber as the distance from the expansion nozzles increases, which improves the flow of room air through the heat exchanger and circulation of air in the room.
The document discusses refrigeration cycles and the ideal vapor-compression refrigeration cycle. It describes how refrigerators and heat pumps work and defines key concepts like the coefficient of performance and ton of refrigeration. The ideal vapor-compression refrigeration cycle is explained through T-s and P-h diagrams. Differences between ideal and actual vapor-compression cycles are also covered, including superheating and subcooling of the refrigerant.
This document summarizes a study on enhancing the coefficient of performance (COP) of a domestic refrigerator by recovering heat from its condenser unit. The researchers installed a thermosiphon heat recovery system to transfer heat from the refrigerator's condenser to a water tank. Experimental results showed that the modified refrigerator with the heat recovery unit achieved higher theoretical and actual COP compared to a conventional refrigerator with an air-cooled condenser. Over an 8 hour period, the heat recovery system was able to heat 100 liters of water in the tank to 60°C. Recovering waste heat from the condenser in this manner improves the refrigerator's energy efficiency while also providing hot water for household use.
Сытник В. С. Основы расчета и анализа точности геодезических измерений в стро...Иван Иванов
В книге изложены вопросы теории и практики расчета, бценки
и анализа точности геодезических измерений, выполняемых при
возведении промышленных, жилых и общественных зданий й\цн-
женериых сооружений. На основе существующих в теории вероят^~—-
ностей
математической статистики и ошибок измерений рассмат
риваются методы расчета необходимой и достаточной точности гео
дезических измерений
применительно к определенным стадиям
строительно-монтажных работ и конструктивным решениям зданий
и сооружений. Значительное внимание уделено анализу точности
результатов геодезических измерений
Poialkova v.m. -_lifter-akademiia_(2007)Иван Иванов
The document is illegible as it contains random characters and symbols with no discernible words, sentences or meaning. It appears to be gibberish with no real information that can be summarized.
This document provides an introduction to a master's thesis that analyzes the legal and commercial issues in EU-Russia relations in the context of sanctions policy. It outlines the goals and structure of the thesis. The thesis will examine EU-Russia relations before and after sanctions were imposed in 2014 over Ukraine, the legal framework around the sanctions, and their impact on trade. It will also explore ways to optimize EU-Russia relations going forward. The introduction establishes that relations between the EU and Russia are an ongoing issue that significantly impacts international politics and economics.
Заковряшин А. И. Конструирование РЭА с учетом особенностей эксплуатацииИван Иванов
Показана роль конструкторского проектирования в обеспечении эффективности технического обслуживания РЭА по фактическому состоянию. В книге
взаимосвязанно решаются вопросы обеспечения ремонто- и контролепригодности
при конструировании РЭА. Ремонтопригодность рассматривается лак решающи”
фактор обеспечения эффективности применения аппаратуры. Область значений
конструктивных показателей РЭА определяется как результат решения задачи
оптимизации заданного качества функционирования.
The document provides guidance for directors of music in senior high schools on producing effective musical programs. It discusses various types of programs, considerations for program building such as attention, contrast and continuity. Organization, administration, publicity, programs/tickets, staging, lighting, costuming and other elements are covered. Experimental research was conducted, including visits to Radio City Music Hall and small theaters, to study professional practices.
1) Adolph W. Berkner of Cayuga, North Dakota invented an improved elevator bucket design.
2) Berkner's elevator bucket has a yieldingly supported bottom plate that can open under excessive weight to prevent overloading, and automatically closes when the weight reaches a predetermined amount to deliver accurate amounts.
3) The bottom plate is flexibly supported by a leather or metal strip attached to the top edge and backed by a metal strip, and is held closed by an arcuate leaf spring.
This document describes a radio navigation system that provides continuous indications of bearing and distance from a transmitter beacon to a receiver. It utilizes a single transmitter and receiver at the beacon location and a transmitter and receiver at the mobile location. The pulsed output of the distance measuring beacon is amplitude modulated with fundamental and harmonic bearing signals. At the mobile receiver, the distance is obtained from the timing of distance measuring pulses while the bearing is obtained by comparing the phase of the envelope wave components and reference signals.
This document describes a process for producing hydrocarbon drying oils through the polymerization of butadiene and styrene monomers in the presence of sodium catalyst. It discusses conducting the reaction in a reactor, then treating the product solution with an organic acid to convert the sodium into a filterable salt. The process aims to improve upon large-scale production by continuously feeding reagents to a reactor while removing the polymerized product, and pre-treating make-up materials to improve reaction efficiency.
This document describes improvements to a carbonating apparatus for producing aerated water. It details a conventional carbonator design and issues with maintaining proper carbonation levels and water temperature. The invention aims to address these issues by wrapping the carbonating chamber in helical coils of pipes, with one pipe carrying water and the other a refrigerant. This design cools the chamber directly to maintain carbonation levels while reducing operating pressures and refrigeration needs.
1. * GB780006 (A)
Description: GB780006 (A) ? 1957-07-31
Improvements relating to refrigerators
Description of GB780006 (A)
PATENT SPECIFICATION
Date of Application and filing Complete Specification: Jan. 4, 1954.
780,006 No. 155/54.
Application made in United States of America on Jan. 5, 1953.
Complete Specification Published: July 31, 1957.
Index at acceptance:-Class 29, H(2A:2H:2X:8).
International Classification:-F25b, d.
COMPLETE SPECIFICATION
Improvements relating to Refrigerators We, GENERAL ELECTRIC COMPANY, a
Corporation of the State of New York, United States of America, having
its office at Schenectady 5, State of New York, United States of
America, do hereby declare the invention, for which we pray that a
patent may be granted to us, and the method by which it is to be
performed, to be particularly described in and by the following
statement:-
This invention relates to refrigerators and more particularly to means
for maintaining a satisfactory degree of humidity in the food storage
compartments of refrigerators.
The formation of frost on the cooling unit in the food storage
compartment of a refrigerator is the result of condensation and
freezing of moisture in the air in the food storage compartment.
During this process of frost formation the cooling unit tends to
maintain in the food storage compartment a dew point near the surface
temperature of the cooling unit, resulting in low relative humidity in
the food storage compartment.
Under conditions of average door openings, 25however, sufficient moist
air is admitted into the food storage compartment for maintaining a
high relative humidity therein. Under conditions of infrequent door
openings little moist air is admitted into the food storage
compartment and the cooling unit succeeds in causing the dew point to
2. approach its surface temperature thereby causing low relative humidity
in the food storage compartment.
When this condition prevails in the food storage compartment there is
a tendency for the natural moisture to be extracted from food items
therein, resulting in drying out of such food items. In order to
minimise such drying out of food, it is essential that some means be
provided for maintaining a satisfactory degree of humidity in the food
storage compartment. Accordingly, an object of the invention is to
provide means including a receptacle of water for maintaining a
satisfactory degree of humidity in the food storage [Pri--compartment
of a refrigerator without causing odour problems.
A refrigerator in accordance with the invention comprises a food
storage compartment, a cooling unit and automatic defrosting 50 means,
a receptacle in said compartment adapted to contain a supply of water,
the receptacle being arranged for heating the water to effect
evaporation thereof for maintaining a satisfactory degree of humidity
in 55 the food storage compartment, means for periodically refilling
the receptacle comprising means for directing defrost water from the
cooling unit into the receptacle, the receptacle being of less
capacity than the 60 amount of water resulting from defrosting of the
cooling unit whereby said receptacle is filled to overflowing by
defrost water each time the automatic defrosting means is effective,
and a drain member associated with an 65 overflow lip on the
receptacle for conducting the overflow water from said food storage
compartment.
In one form of the invention the receptacle contains a heating element
adapted to 70 be energised for evaporating the water in the receptacle
in response to conditions within the food storage compartment. In
another form, the receptacle rests on the bottom of the food storage
compartment just over a 75 machinery compartment housing a
refrigerating unit, and heat leakage into the food storage compartment
from the refrigerating unit effects evaporation of the water supply.
In still another form, a heat path is provided 80 between the
receptacle and the outer case of the refrigerator and room heat is
thereby utilised for evaporating the water supply.
The invention will be further described with reference to the
accompanying drawing 85 in which: Fig. 1 is a perspective view of a
refrigerator partly broken away to illustrate certain features of the
preferred embodiment of the invention; 90 780,006 Fig. 2 is an
enlarged fragmentary sectional view illustrating details of the
preferred embodiment of the invention; Fig. 3 is a diagrammatic
showing of an arrangement for controlling a heating element; Fig. 4 is
a diagrammatic showing of another arrangement for controlling the
heating element; Fig. 5 is a diagrammatic showing of still another
3. arrangement for controlling the heating element; Fig. 6 is a side
elevation of the refrigerator partly broken away to illustrate a
second embodiment of the invention; and Fig. 7 is an enlarged
fragmentary sectional view illustrating a third embodiment of our
invention.
Referring to the drawing, there is shown in Fig. 1 a refrigerator
generally designated 1.
The refrigerator 1 comprises an outer case 2 and a liner 3. The space
between the outer case and liner is filled with suitable insulation
and the liner 3 defines a food storage com25partment 4. Additionally,
a heat insulating breaker strip 5 closes a space between the edges of
the outer case 2 and the liner 5 at an access opening to the food
storage compartment 4. Provided for closing the access opening is a
door 6 supported on the outer case 2 by a pair of hinges 7. Arranged
in the upper portion of the food storage compartment 4 for cooling the
air therein is a cooling unit or evaporator 8. Located beneath the the
food storage compartment 4 is a machinery compartment shown in outline
and generally designated 9. Housed in the machinery compartment 9 and
also show in outline is a refrigerating unit 10 adapted when energised
to supply refrigerant to the cooling unit.
During normal operation of the refrigerator 1, moisture in the air in
the food storage compartment 4 tends to condense and freeze 45on the
cooling unit 8. Periodically and automatically defrosting means such
as a sheath heating element, shown in outline in Fig. 1 and designated
11, is effective for heating the cooling unit 8 and thereby melt50ing
the frost therefrom. It is to be understood, of course, that means
other than the heating element 11 could be utilised for defrosting the
cooling unit 8. For instance, the refrigerating system employed in the
refrigerator 1 could be of the reverse cycle type and defrosting could
be effected by periodically directing warm refrigerant to the cooling
unit. Usually the defrost moisture or water resulting from a
defrosting operation is conducted directly to a receptacle in the
refrigerator or to the exterior of the refrigerator for disposal.
However, in a manner which will be described in detail hereinafter,
the invention contemplates employment of the defrost moisture in
maintaining a satisfactory degree of humidity in the food storage
compartment 4.
Under conditions of average door openings and average humidity in the
room containing the refrigerator 1, relatively moist air is 70
admitted into the food storage compartment 4. This moist air causes
water to condense in the food storage compartment 4. During periods
when the door 6 is closed this water evaporates and recondenses on the
cooling 75 unit 8. So long as moist air is admitted into the food
storage compartment 4 and so long as the just-mentioned water
4. evaporation and recondensation take place, free moisture exists and,
therefore. a high relative humidity 80 is maintained in the food
storage compartment. As a result, the natural moisture of food items
in the food storage compartment 4 is not extracted from such food
items.
Under conditions of infrequent door openings and less than average
room humidity, hoGwever, the amount of moist air admitted into the
food storage compartment 4 is insufficient for maintaining a high
relative humidity and, therefore, the food items in 90 the food
storage compartment tend to be dried out by extraction of moisture
therefrom.
In order to minimise the drying out of food items stored in the food
storage compartment 95 4, there is provided a humidifier for
maintaining a degree of humidity in the food storage compartment at
which the food items stored in the food storage compartment retain
their natural moisture. 100 The preferred embodiment of the invention
is illustrated in Figs. 1 and 2. This form comprises a receptacle or
tray 12 containing a supply of moisture or water indicated by 13.
The receptacle 12 further contains a sheathed 105 heating element 14.
Current is supplied to the heating element 14 through an electrical
plug 15 protruding from one side 'of the receptacle 12 and received by
an electrical socket 16 suitably mounted on a side wall of 110 the
liner 3. -This connection renders the receptacle 12 removable for
cleaning and provides support for one end of the receptacle.
The other end of the receptacle may be supported by one or more hooks
17 adapted for 115 engaging a rack or shelf 18 suitably supported in
the food storage compartment 4.
The heating element 14 is submerged in the water supply 13 and is
adapted for being energised and heating the water thereby to 120
effect evaporation of the water to increase the humidity in the food
storage compartment 4. In order to provide a satisfactory degree of
humidity in the food storage compartment, we provide means for
energising 125 the heating element 14 in response to conditions in the
food storage compartment. In Fig. 3 is illustrated a circuit 19 in
which the heating element 14 is controlled in response to either the
temperature of air or humidity 130 780,006 in the food storage
compartment 4. A comnponent 20, included in the circuit 19, may be
either a thermostat or a humidistat adapted for being located in the
food storage compartment 4. Any suitable thermostat or humidistat is
employable in this arrangement and since these devices are well known
in the art, they are not herein described or shown in detail. When the
component 20 of Fig.
3 is a theromstat, the temperature of the air in the food storage
compartment 4 controls the heating element 14. With this arrangement,
5. when the temperature of the air in the food storage compartment
approaches a predetermined minimum, at which it is likely that
substantially all of the moisture in the air in the compartment would
be condensed and frozen on the cooling unit 8, the thermostat
completes a circuit through the heating element 14. Thus, the supply
of water 13 in the receptacle 12 is heated and a portion thereof is
evaporated for increasing the humidity in the food storage compartment
4. The thermostat is adapted for de-energising the heating element 14
when the air in the food storage compartment attains a predetermined
maximum. This predetermined maximum is preferably approximately 40'F.
since this temperature is usually attained by the air in the food
storage compartment through door openings which also admit moisture
into the compartment. Thus, electrical current is conserved since a
satisfactory degree of humidity is arrived at through door openings
and the evaporation of the water supply 13 by energisation of the
heating element 14 is not required.
When the component 20 of Fig. 3 is a humidistat, the humidity in the
food storage compartment 4 controls the heating element 14. In such an
arrangement, when the degree of humidity in the food storage
compartment 4 approaches a predetermined minimum, the thermostat
completes a circuit through the heating element 14. Thus, the supply
of water 13 is heated and a portion thereof is evaporated from the
receptacle 12 for increasing the humidity in the food storage
compartment. Subsequently, when s0 the degree of humidity in the food
storage compartment is increased to a predetermined maximum or a
satisfactory degree the humidistat de-energises the heating element
14.
It is to be understood, of course, that if the s humidity in the
compartment stands at or above the satisfactory degree due to door
openings, evaporation of water from the receptacle 12 will not be
required and the humidistat will prevent energisation of the heating
element 14.
As seen in Fig. 1, a butter conditioner indicated by 21 is provided in
the door 6 of the -refrigerator 1. In Fig. 4 is illustrated a circuit
22 whereby both the butter conditioner 21 and the heating element 14
in the receptacle 12 may be controlled. The circuit 22 includes the
heating element 14, a thermostat 23 and another heating element 24.
The thermostat 23 and the heating element 24 are located in the butter
conditioner 21. The 70 butter, or any other food item that may be
stored in the butter conditioner 21, is cooled by air entering the
butter conditioner from the food storage compartment 4. When the air
entering the butter conditioner 21 75 decreases to a predetermined
minimum temperature, the thermostat 23 completes the circuit 22 for
energising the heating element 24. Thus, the air in the butter
6. conditioner 21 is heated for maintaining the butter at a 80
consistency suitable for easy spreading.
When the air in the butter conditioner 21 attains the just-mentioned
predetermined minimum temperature, the air in the food storage
compartment 4 will have attained a 85 lower predetermined minimum
temperature.
This low temperature is usually associated with few door openings.
Therefore, there is a tendency for moisture to be extracted from the
food items stored in the food storage 90 compartment. Completion of
the circuit 22 by the thermostat 23, however, in addition to
energising the heating element 24 to heat the air in the butter
conditioner 21, is effective for also energising the heating element
14 95 thereby to evaporate some of the water supply 13 for increasing
the humidity in the food storage compartment.
Upon subsequent door openings, warm and moist air is admitted into the
food storage 100 compartment 4. This air enters the butter conditioner
21 and causes the thermostat 23 to open the circuit 22. Thus, the
heating element 24 is de-energised since it is no longer needed for
raising the temperature of 105 the air in the butter conditioner 21.
Additionally, the heating element 14 is de-energised since, due to the
moisture admitted into the food storage compartment 14 by the door
openings, it is no longer needed for evaporating the water supply 13.
In Fig. 5 is illustrated another circuit 25 adapted for effecting
evaporation of the water supply 13 from the receptacle 12 during
infrequent door openings when an increase 115.
in the degree of moisture in the food storage compartment 4 is desired
and for de-energising the heating element 14 as door openings increase
and moisture is admitted to the food storage compartment. The circuit
25 120 includes the refrigerating unit 10 and a temperature responsive
control generally designated 26. The control 26 includes a bellows 27,
a volatile fluid contained in a bulb 28 adapted for being placed in
heat exchange 125 relationship with the cooling unit 8, a tube 29
connecting the bulb 28 and the bellows 27, and a contact member 30
adapted for being actuated by the bellows 27. The contact member 30
controls a pair of contacts 31 be780,006 tween the refrigerating unit
10 and a source of power. At a predetermined high tem.
perature of the cooling unit 8, as effected b3 frequent door openings,
the volatile fluid ir 5the bulb 28 effects expansion of the bellows 27
whereby the contact element 30 is actuated for closing the contacts
31. Thus, a circuit is completed through the refrigerating unit 1C for
energising the refrigerating unit to supply refrigerant to the cooling
unit 8 for decreasing the temperature thereof. The contact member 30
also controls a pair of contacts 32 in a circuit including the heating
element 14. When the contacts 31 are closed and the 15refrigerating
7. unit is energised, the contacts 32 are open and the heating element 14
is de-energised, this being a desirable operation due to the high
probability that frequent door openings which cause energisation of
the 20refrigerating unit will also admit sufficient moisture into the
food storage compartment for maintaining a satisfactory degree of
humidity therein. Subsequently, when energisation of the refrigerating
unit 10 and infrequent door openings cause the cooling unit 8 to
attain a predetermined low temperature, the volatile fluid in the bulb
28 effects contraction of the bellows 27 and the contact member 30
opens the contacts 31 and closes the contacts 32, in the manner shown
in Fig.
5. Thus, the refrigerating unit 10 is de-energised and the heating
element 14 is energised forincreasing the humidityin the food storage
compartment 4. This is a desirable operation also since that time when
the refrigerating unit is de-energised is the time when a low degree
of humidity is most likely to be encountered in the food storage
compartment.
When door openings are more frequent, the 40refrigerating unit
operates a greater portion of the time. Also, humidity in the food
storage compartment is likely to be high when door openings are
frequent. By the invention this is automatically taken account of in
the control of the heater since this is energised a smaller portion of
the time under these conditions.
In order to avoid odour problems, means are provided preventing
stagnation of water in the receptacle 12. This is accomplished by
periodically refilling the receptacle 12 to overflowing whereby matter
at the surface of the supply of water 13, which usually causes odours,
is periodically washed from the receptacle. To facilitate this
periodic overflowing of the receptacle 12 and disposal of the overflow
water, the receptacle is provided with an overflow lip 33 at one end
thereof.
Associated with the lip 33 for receiving over60flow water therefrom is
a drain member 34.
The drain member 34 may conduct the overflow water to either a sevwage
connection beneath the refrigerator or to automatic disposal means in
the machinery compartment 9 of the refrigerator.
The periodic refilling of the receptacle 12 is accomplished by
utilising the water resulty ing from defrosting of the cooling unit 8;
for this purpose a drain pain 35 is supported s just beneath the
cooling unit 8 and inclined 70 downwardly toward the back wall of the
s liner 3. The drain pan 35 catches and directs ) water resulting 7rom
defrosting of the cooling unit 8 toward the back wall of the liner.
Supported on the back wall of the liner bet neath the rear edge of the
drain pan 35 for catching the defrost moisture is an inclined trough
8. 36. The trough 36 directs the water to the upper end of another
inclined trough 37 suitably secured to the side wall of the80 liner 3.
The trough 37 directs the water into the receptacle 12. The capacity
of the receptacle 12 is less than the amount of water normally
resulting from a defrosting operation. As a result, each defrosting
operation 85 results in refilling of the receptacle 12 to overflowing.
Thus, the water supply 13 is replenished and stagnation)f water in the
receptacle 12 is avoided.
In Fig. 6 is shown a second embodiment of 90 the invention in which
heat emanating from the refrigerating unit 10 in the machinery
compartment 9 of the refrigerator 1 is utilised for increasing the
humidity in the food storage compartment 4. In this form, water 95
resulting from defrosting of the cooling unit 8 is conducted by an
inclined drain pan 38 to the back wall of the liner 3. The water runs
down the back wall of the liner 3 and is directed by a chute member 39
into a receptacle 40 resting on the bottom of the food storage
compartment 4. Thlus, the receptacle is provided with a supply of
water indicated by 41. Thus, the receptacle 40 is provided with a
supply of water indicated by 41. 105 The receptacle 40 is also
provided with an overflow lip 42 associated with a drain member 43 for
directing overflow water into the machinery compartment 9 for
disposal. The receptacle 40 is similar to the receptacle 12 110
described above in that it. too, is of less capacity than the amount
of water normally resulting from each defrosting operation of the
cooling unit 8. Consequently, each defrosting operation results in a
replenishment 115 of the water supply 41 and overflowing of the
receptacle 40 for preventing stagnation of water therein. In this form
of the invention the receptacle 40, in resting on the bottom of the
food storage compartment 4, is disposed 120 directly over the
refrigerating unit 10 located in the machinery compartment 9 beneath
the food storage compartment. The water supply 41 is heated by the
heat emanating from the refrigerating unit 9 and leaking into the food
125 storage compartment 4 through the bottom thereof. Thus, the
receptacle is arranged so that the water supply 41 is heated for
effecting evaporation of a portion thereof into the food storage
compartment 4 for maintaining 130 780,006 a satisfactory degree of
humidity therein.
In Fig. 7 is illustrated a third embodiment of the invention in which
heat from the air in the room containing the refrigerator 1 is
utilised for increasing the humidity in the food storage compartment 4
of the refrigerator. Fig. 7 shows in detail the construction of the
refrigerator cabinet at the access opening to the food storage
compartment 4. The heat insulating breaker strip 5, as pointed out
above, closes the space between the edges of the outer case 2 and the
9. liner 3. Additionally, the breaker strip 5 minimises heat transfer
from the outer case 2, which is formed of a high heat conductive
material and, therefore, is warmed by room air, to the cooler liner 3.
Passing through the breaker strip 5 and thereby insulated from the
liner 3 is an element or strap 44 formed of aluminium or any other
high heat conductive material. One end of the strap 44 is secured, as
by welding, to the outer case 2. The other end of the strap 44 is
disposed in the food storage compartment 4 and is similarly secured to
a receptacle 45 also formed of a high heat conductive material such as
aluminium. In this arrangement, the strap 44 provides a heat path from
the outer case warmed by room air to the relatively cooler receptacle
45. In this manner the receptacle 45 and a supply of water contained
therein and indicated by 46 is heated for effecting evaporation of a
portion of the water thereby to increase the humidity in the food
storage compartment 4.
Thus, room heat is utilised in maintaining a satisfactory degree of
humidity in the food storage compartment. In a manner similar to that
shown in either Fig. 1 or Fig. 6, periodic defrosting of the cooling
unit 8 is employed for replenishing the water supply 46 and for
preventing stagnation of water in the receptacle 45 of the present
form of the invention.
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