Refrigeration compressors

Refrigeration compressors

Refrigeration compressors are an important component of any refrigeration system. They convert the refrigerant in saturated vapour state to superheated state. There are various types of compressors used for refrigeration.

They include reciprocating compressors, centrifugal compressors, scroll compressors, screw compressors, vane compressors, etc.

Reciprocating refrigeration compressors have pistons moving inside a cylinder in an up and down fashion. They have the advantage of ability to create high compression ratios but suffer from noise and low efficiency. Centrifugal compressors use radial flow of vapour for compression.

They have blades mounted on a rotating shaft that create the radial flow. They can handle large volume of vapour but the compression ratio is low.

As reciprocating compressors using pistons and valves are noisy, they are being replaced by scroll compressors.

The latter consist of 2 spiral shaped members that fit into each other. One of them remains stationary while the second rotates around it. The refrigerant vapour is sucked into the centre of the scroll increasing the pressure. The compression is continuous, smooth, efficient and quiet.

Scroll compressors are durable and more efficient than reciprocating compressors. They are widely used as refrigeration compressors.

Depending on the type of application, like white goods, mobile refrigeration, light commercial refrigeration, commercial refrigeration, air conditioning etc. and the type of refrigerant used the right compressor with the right capacity needs to be chosen for a given application.

For example, for mobile applications, small DC hermetic compressors are used while large scroll compressors do the job for large commercial air conditioning or industrial application.

Refrigeration compressors that operate both with both Direct Current (9.6V to 31.5 V) and Alternating Current (85 VAC to 265 VAC, 50 / 60 Hz) are available.

The system automatically detects the type of input power. The DC only compressors are used in refrigerators as well as freezers and are preferred for mobile applications. Dual voltage compressors operating in 12V and 24V function with solar panels also as the source of power. They are protected against overload and destructive battery discharge by electronic circuits. These DC refrigeration compressors are also used for comfort cooling systems in trucks to provide a comfortable environment for drivers during resting etc.
Teklab oil level control system can be customized to function with various brands of compressors available worldwide.

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