Capillary tube systems, as shown in Fig. 3-9, is one of the most popular compression type systems. This system is widely used in domestic refrigerators, freezers, air conditioners, dehumidifiers and small commercial applications.
Liquid refrigerant (dark red) flows from the condenser to the liquid line, It then flows through the filter (which can also be dry). From the filter refrigerant passes through the capillary tube refrigerant management in the evaporator. The liquid refrigerant entering the capillary tube in the filter end, at high pressure (dark red). This high-pressure side. The evaporator pressure low.
The capillary tube is designed so that it maintains a pressure difference time of the compressor. The compressor maintains low pressure in the evaporator. Refrigerant boiling rapidly absorbing heat. The vaporized refrigerant (blue light) moves through the suction line back to the compressor. Here is compressed to high pressure and released in the condenser (red light).
The vaporized the refrigerant is cooled in a refrigerator and returns fluid (dark red). He again runs into the liquid line.
This work continues until the thermal element is cooled to the desired low temperature. When this temperature is reached, heat element engine works management mechanism. He turns off the power to the motor. Refrigeration cycle stops. It will remain stopped until the thermal element is heated. The thermal bulb pressure will be close to the engine control contacts to work again with the compressor. This type of loop is quite satisfactory for the majority of cooling applications. In a closed loop, capillary tube allows you to load balance between the high and low sides. Usually there is no need, then, to use a motor with high starting torque...
Compressors 