Presentation of the refrigerator

1. GROUP 3
REFRIGERATOR
Unit3
Nguyen Thi Quynh Trang
Vu Quynh Mai
Ta Thi Tham
Chu Ngoc Mai

2. TABLE OF CONTENTS
HISTORY
Nguyen Thi Quynh Trang
1.
WORKINGPRINCIPLES
Ta Thi Tham
3.
STRUCTURE
Vu Quynh Mai
2.
TIPSFORSAFETYUSING
Chu Ngoc Mai
4.

3. 1
HISTORY
Nguyễn Thị Quỳnh Trang
20204175

4. William Cullen - the first person to
observe & demonstrate artificial
refrigeration via evaporative cooling
1748
1834
Jacob Perkins invented the first vapor
compression system for refrigerators
1876
Carl von Linde patented a new
process for liquefying gases used in
artificial refrigeration
1913
Fred W. Wolf invented the
first home electric refrigerator 1918
William C. Durant began mass
producing the first home refrigerator
with a self-contained compressor
1927
The home refrigerator -
widespread popularity across
the U.S

5. 1748
Diethylether
William Cullen

6. 1834 Jacob Perkins

7. 1876
Carl von Linde
GAS LIQUEFACTION PROCESSES

8. 1913
Fred W. Wolf
A refrigeration unit
on top of an icebox

9. 1918
A self-contained compressor
William C. Durant

10. 1920 TODAY

11. 2
The main
WorkingParts
Vũ Quỳnh Mai 20204128

13. 5mainparts
Dàn ngưng (dàn nóng)
Condenser
Refrigerant
Chất tải lạnh
Evaporator
Dàn bay hơi (dàn lạnh)
Expansion valve
Van giãn nở
Compressor
Máy nén

14. As a liquid changes into
a gas, it extracts heat
Refrigerant
Principle
Definition
Absorb heat -> transfer
heat to another place
Reason
Refrigerant > water
GWP
Global warming
potential ( 0- thousands)
ODP
Ozone depletion
potential (0-1)

15. ● A thin set of copper tubes
● Function: lowers the liquid
refrigerant’s temperature and
pressure -> half of it to evaporate
Expansionvalve

16. ● Set of coils arranged in a zigzag
shape
● Location: freezing compartment
● Function: absorb heat from food
or drink
Evaporator

17. Compressor
● A pump: enable the flow of refrigerant
● Location: the bottom of, towards the
back
● Function: pressure and temperature

18. ● Set of coils arranged in a zigzag
shape
● Location: underneath or on the side
● Function: receive and reject heat to
the surrounding
Condenser

19. 3
WORKING
PRINCIPLES
OPERATION
Tạ Thị Thắm

20.  Refrigerator removes heat from one
region and depositing it in another.
 The tendency of gases to get hot
when they are compressed and cold
when they expand.
 Along with the help of some refined
devices, helps a refrigerator cool the
stuff stored in it.
WORKING PRINCIPLES

21. OPERATION
Compressor compresses
refrigerant gas  heats up
due to pressurization
 Hot refrigerant gas
dissipate heat by coils
 Gas condenses into
liquid at high pressure
High pressure liquid flows
through expansion valve
Low pressure refrigerant
gas is sucked up by the
compressor  cycle repeats
 Liquid boils and vaporizes
 Temperature dropping to
-25°F
01
02
03
04
05

23. 4
TipsforSafety
Using
Chu Ngọc Mai 20200379

24. DOsand DON’Ts

25. Full capacity => risk of
serious damage &
the equipment lifespan &
energy costs
WHAT YOU DO
SPACE
CONDENSER COILS
Dirt and grime build up
on coils => fridge work
harder & run more often
COOLDOWN
Hot leftovers increase
the energy needed to
cool it all down
SURROUNDING AREA
Free of paper or other
flammable materials;
enough room
PROPER TEMPERATURE
Keep the refrigerator
temp <= 4° C. Freezer
temp should be -18° C
MAINTAINANCE
Defrost fridge at least
once a year; clean
regularly

26. WHATYOUDON’TDO
Place a refrigerator
near cookers, radiators,
or in direct sunlight
POSITION
GASKET/DOOR SEAL
Prevent cold air from
escaping => pay
attention when closing
FREQUENCY
Open the door too
often & for too long
UNCOVERED FOOD
Bacteria easily
spreading; spilled out

27. ORGANIZE YOUR FRIDGE

28. CONCLUSION
Working principles
03
01
History & Classification
04
Tips for safety using
02
Main parts/Structure

29. RESOURCES
1. https://www.scienceabc.com/innovation/how-does-a-refrigerator-work-working-
principle.html
2. https://www.repairclinic.com/Repair-Library/Article/61/Refrigerator-Care-Dos-
And-Don-Ts
3. https://spectroline.com/maintenance-tips-refrigeration-systems/
4. https://greatist.com/eat/ultimate-way-organize-your-fridge#making-the-most-of-
your-fridge
5. https://www.lifestorage.com/blog/storage/how-to-store-food-refrigerator/
6. https://www.electricalsafetyfirst.org.uk/guidance/product-safety/refrigerators/

30. CREDITS: This presentation template was
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THANKS
DO YOU HAVE ANY QUESTIONS?
GROUP 3
Nguyen Thi Quynh Trang
Vu Quynh Mai
Ta Thi Tham
Chu Ngoc Mai
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