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Posts Tagged ‘Low Temperature’

The compressor is the pump that circulates refrigerant through the system.The suction side of the compressor pulls in refrigerant in a low pressure,low temperature form. The refrigerant is then pumped through the compressor to the discharge or outlet side where it’s compressed, raising its temperature.It’s now ready once more to condense and release heat. The pressurized,heated refrigerant vapor is forced out of the compressor, through the high pressure line, to the condenser.

Basically, all compressors fall into one of two categories: piston type and rotary vane type. As the name implies, piston type compressors have one or more (up to ten) pistons arranged in either an inline, axial, radial or vee configuration.Rotary’vane compressors have no pistons.

Piston type compressors go through an intake stroke and a compression stroke for each cylinder. On the intake stroke, the refrigerant from the low side (evaporator side) of the system is drawn into the compressor. The intake of refrigerant occurs through reed valves. These one-way valves control the flow of refrigerant vapors into the cylinder.During the compression stroke, the gaseous refrigerant is compressed.

This increases both the pressure and the temperature of the heat-carrying refrigerant.The outlet (discharge) side reed valves then open to allow the refrigerant to move into the condenser. The outlet reed valves may be considered the beginning of the high side of the system.