Types of compressor used in Air conditioner.

 Compressor.

Compressor is a device which is used to compress refrigerant and make flow of refrigerant in whole air conditioning system.
This is the heart of air conditioning system.




Classification of compressor according to method of compression.


There are two different types of compressor used in Air conditioning system.



1. Positive displacement compressor

2. Dynamic compressor

1. Positive displacement compressor

In this compressor pressure of refrigerant increased by compress refrigerant (to reduce volume).
We know that pressure is inversely proportional to volume. 
There are following types of positive displacement compressor.

A. Reciprocating compressors

1. Single acting

 2. Double acting

 3. Diaphragm


 

B. Rotary compressors 

1. Lobe compressor

2. Screw compressor

3. Scroll compressor

4. Liquid ring compressor

5. Vane compressor


2.Non positive displacement compressors or dynamic compressor.

In this type of compressor increase the velocity of refrigerant and then convert kinetic energy in to pressure energy by the help of deffuser.

A. Centrifugal compressors

B. Axial compressor.


Classification of compressor according to structure.

1. Open type compressor.

In this type of compressor prime mover and the compression device are seperate they are connected with the help of belt. 

2. Hermatic compressor

In this type of compressor prime mover and compression device both are mounted in a casing and the casing is permanently sealed by  welding. Hermatic compressor doesn't repairable.


3. Semi Hermatic compressor.

In this type of compressor prime mover and compression device are in same casing but casing is connected with fasteners ( nut & bolts) . These are repairable.

Now we will know that which types of compressor used in which types of air conditioner.


Types of compressors



Small-sized split type air conditioner - Rotary

Ex- Room air conditioner

Mid- and large-sized split type and packaged air conditioner - scroll compressor

Ex - VRV 

Large-sized chiller  - Reciprocating

                                      - Screw compressor.

EX - Chiller.


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