Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Product Training Course
Part I: The Line of Fan Knowledge
The Role of Cooling Fans
a. Essential to systems that generate a significant amount of heat
b. Protect systems from overhe...
• Types of Air Mover Products : Axial Fans vs. Blowers
• Structure of Cooling Fans and Blowers
• Fan Performance Guide & F...
What are axial fans and blowers?
4. Product Performance
5. Applied Work Systems
6. Flow Direction
Types of Air Mover Produ...
Axial Fan
* Axial Fans ( also called “box fans”)
- Large volume airflows
- Low-pressure
- Low system impedance conditions
...
Axial Fan Structure
Three Major Parts:
Rotor
Stator
Frame
Rotor -(incl. impeller, axial,
case, Magnet)
Stator- (incl. Bear...
Blower
* Blowers
- More concentrated airflows
- High system impedance conditions
- High level of noise
- Option for single...
Blower Structure
Three Major Parts:
Top Cover
Impeller
Bottom Cover
Top Cover
Impeller
Bottom Cover
Fan Performance Guide
How to measure the performance of fan?
• Air Flow
• Air Pressure
• Air Speed
• Air Noise
• Fan Blade...
Fan Characteristic – Fan Air Flow
• The total cubit of flow moved in certain time
• CFM (Cubic Feet Per Minute) indicates ...
Fan Characteristics – Static Pressure
• Purpose : To resist the resistance created
by system
• The amount of resistance in...
Fan Characteristic – Fan Air Speed
• Purpose: to provide the required speed to
the required amount of cooling
• Fan blade ...
Fan Characteristic – Fan Noise
• Purpose: to know if the fan noise level
would affect the system operation in work
environ...
Fan Characteristic – Fan Blade
• The direct influence of performance of the airflow and air pressure
• the more fan blades...
Bearing Types
Bearing Types – ball, sleeve, and one ball one sleeve
In order for a cooling fan to work
efficiently, it rel...
Fans & Bearing
Three Bearings Analysis I
Type Advantage Weakness
Ball Bearing
1. suitable for lower speed
2. high reliabil...
Fans & Bearing
Three Bearings Analysis II
Type Life Expectancy Environment Noise Level Mounting
Ball Bearing 60,000 hours
...
AC & DC Fans
a. The Type of AC and DC fans
b. Uses of AC and DC fans
c. Installing AC and DC fans
d. AC and DC fans Select...
AC & DC Fans
AC VS DC Fans
Type of Electricity Voltage
Options
Construction Applications
AC FAN -alternating current (AC)
...
AC & DC Fans
AC & DC Current
Connector Types – AC & DC Fan
AC Terminal
Connectors
• Wire Cord
• Power Plug Cord
AC Wire Connectors
(Leads)
• two black ...
Connector Types – AC & DC Fan
DC Fan with lead wire
Offer an alternative for
customize design
AC Fan with lead wire AC Fan...
AC Fan Assembly Chart
DC Fan Assembly Chart
How To Choose an Ideal Fan
• Current and Voltage
• Case Dimensions
• Decide Connector Type
• Measure the heat
• Decide the...
Contact Us
USA Office
275 Paseo Tesoro
Walnut, CA 91789
Tel: +1-909-598-6033
Fax: +1-909-598-6043
Email: sales.usa@cooltro...
Product training   fan knowledge
Upcoming SlideShare
Loading in …5
×

Product training fan knowledge

1,526 views

Published on

  • Be the first to comment

Product training fan knowledge

  1. 1. Product Training Course Part I: The Line of Fan Knowledge
  2. 2. The Role of Cooling Fans a. Essential to systems that generate a significant amount of heat b. Protect systems from overheating and malfunctioning c. Come in different makers and models, and are engineered specifically for the system in designs Introduction
  3. 3. • Types of Air Mover Products : Axial Fans vs. Blowers • Structure of Cooling Fans and Blowers • Fan Performance Guide & Fan Characteristics • Differences in AC & DC Fan • How to Select an Ideal Fan Fan Knowledge Topic Agenda
  4. 4. What are axial fans and blowers? 4. Product Performance 5. Applied Work Systems 6. Flow Direction Types of Air Mover Products 1. Size 2. Shape 3. Product Features
  5. 5. Axial Fan * Axial Fans ( also called “box fans”) - Large volume airflows - Low-pressure - Low system impedance conditions - Low noise level * Flow Direction: - bow air across their axis in a linear direction * Markets – CPU, IT, home, office, telecom, medical, industrial equipments, and etc…
  6. 6. Axial Fan Structure Three Major Parts: Rotor Stator Frame Rotor -(incl. impeller, axial, case, Magnet) Stator- (incl. Bearing, SI steel, Cover, PCB & fastener) Frame
  7. 7. Blower * Blowers - More concentrated airflows - High system impedance conditions - High level of noise - Option for single or dual inlets *Flow Direction: - The flow go in from the shaft direction and out from the radial direction * Markets – office automation equipment, network servers, industrial and telecom systems, and portable consumer product
  8. 8. Blower Structure Three Major Parts: Top Cover Impeller Bottom Cover Top Cover Impeller Bottom Cover
  9. 9. Fan Performance Guide How to measure the performance of fan? • Air Flow • Air Pressure • Air Speed • Air Noise • Fan Blade • Bearing Type
  10. 10. Fan Characteristic – Fan Air Flow • The total cubit of flow moved in certain time • CFM (Cubic Feet Per Minute) indicates the volume of air that a fan will move in one minute at zero static pressure. • Unit: CFM : ft^3/min, CMM : m^3/min; 1 CMM = 35.315 CFM Fan Air Flow (CFM) • Purpose: to provide the required flow for heat dissipation
  11. 11. Fan Characteristics – Static Pressure • Purpose : To resist the resistance created by system • The amount of resistance in a circulation that a fan must surmount to ensure proper air movement • As the pressure differential rises, the airflow drops Static Pressure (mm-H2O) • Unit : mmH2O, InH2O; 1InH2O = 25.4mmH2O
  12. 12. Fan Characteristic – Fan Air Speed • Purpose: to provide the required speed to the required amount of cooling • Fan blade rounds per minute • The more airflow generated, the faster fan blade rotates • Unit: RPM (Revolutions Per Minute) Fan Air Speed (RPM)
  13. 13. Fan Characteristic – Fan Noise • Purpose: to know if the fan noise level would affect the system operation in work environment • Noise is measured in accordance with ISO7779 standards in Anechoic Chamber with less than 18.6 dBA background noise Fan Noise (dBA) • The greater the change in air pressure, the louder the resulting noise will be. • The noise created by airflow and normal friction from mechanical structure. • Unit: dBA (A-weighted decibels)
  14. 14. Fan Characteristic – Fan Blade • The direct influence of performance of the airflow and air pressure • the more fan blades, the higher air pressure • the more fan blades, the higher airflow • the more fan blades, the harder to maintain the plastic mold Blade Shape and Numbers of Blades
  15. 15. Bearing Types Bearing Types – ball, sleeve, and one ball one sleeve In order for a cooling fan to work efficiently, it relies on bearings. These bearings reduce friction and allow a fan to operate at high speeds. Three standard fan bearing types are ball, sleeve, and one ball one sleeve. Which type of bearing a fan utilizes depends on its function as well as the speed at which it moves.
  16. 16. Fans & Bearing Three Bearings Analysis I Type Advantage Weakness Ball Bearing 1. suitable for lower speed 2. high reliability & durability 3. seal type, no oil leakage problem 1. high cost 2. irregular rolling is larger while the motor spinning at high speed and easier to create vibration 3. big vibration and high noise Sleeve Bearing 1. low cost 2. easy to produce 1. low life expectancy 2. face to face friction and easily to lead abrasion 3. material is softer Combined Bearing (one ball and one sleeve) 1. work in quite complicated conditions 2. less sensitive to a unbalance of an impeller 3. lower vibration 1. high noise level 2. lower life expectancy 3. oil leakage problem
  17. 17. Fans & Bearing Three Bearings Analysis II Type Life Expectancy Environment Noise Level Mounting Ball Bearing 60,000 hours Higher heat, no shocks High Any Sleeve Bearing 30,000 hours Low heat, higher shocks Low Horizontally Combined Bearing (one ball and one sleeve) 40,000 hours Low heat, higher shocks Medium Any
  18. 18. AC & DC Fans a. The Type of AC and DC fans b. Uses of AC and DC fans c. Installing AC and DC fans d. AC and DC fans Selection Differences in AC and DC Fan
  19. 19. AC & DC Fans AC VS DC Fans Type of Electricity Voltage Options Construction Applications AC FAN -alternating current (AC) charges that change direction quickly. -provide a constant flow higher voltage 110, 115, 120, 220, 230, 240 VAC Case is usually made from die cast aluminum in a wide variety of higher power applications DC FAN -direct current (DC) electrical flows that only move in one direction -provides a variable, uneven flow Lower voltage 3, 5, 12, 24 and 48 VDC Case is usually made from thermoplastic medical instruments, telecom switches, car entertainment systems
  20. 20. AC & DC Fans AC & DC Current
  21. 21. Connector Types – AC & DC Fan AC Terminal Connectors • Wire Cord • Power Plug Cord AC Wire Connectors (Leads) • two black colored wires • soldering required each time when the fan needs to be replaced AC Fans DC Fans DC Wire Connectors • two or more wires • the first wire – red color -> positive voltage • the second wire – black color  negative voltage • additional wires –> special fan functions (thermistor, PWM) • bounded together with a molex or pin connector at the end
  22. 22. Connector Types – AC & DC Fan DC Fan with lead wire Offer an alternative for customize design AC Fan with lead wire AC Fan with terminal lead two black wires Black -> negative Red -> positive power plug cord
  23. 23. AC Fan Assembly Chart
  24. 24. DC Fan Assembly Chart
  25. 25. How To Choose an Ideal Fan • Current and Voltage • Case Dimensions • Decide Connector Type • Measure the heat • Decide the permissive temperature in the unit • Calculate the required air volume • Estimate the system impedance • Select the data sheet by fan performance curve Guideline to choose a fan best fits your application
  26. 26. Contact Us USA Office 275 Paseo Tesoro Walnut, CA 91789 Tel: +1-909-598-6033 Fax: +1-909-598-6043 Email: sales.usa@cooltron.com China Office 6F,Taojing Bldg., Mingbao Rd., Minzhi, Baoan District, Shenzhen, China Tel: +86-755-8209-0805 Fax: +86-755-2904-3077 Hong Kong Office Room 2005, 20/F, Centremark, 287-299 Queen's Road. Central, Hong Kong

×