Working principle of chiller

The working principle of the chiller

The refrigerant absorbs the heat of the cooled object in the evaporator and vaporizes into steam. The compressor continuously extracts the generated steam from the evaporator. And compressed, the compressed high-temperature and high-pressure steam is sent to the condenser and then releases heat to the cooling medium (such as water, air, etc.) and condenses into high-pressure liquid.

After being decompressed by the throttling mechanism, it enters the evaporator, vaporizes again, and absorbs the heat of the object being cooled, and the cycle continues over and over again. During heating, the refrigerant changes the flow direction of the refrigerant through the four-way valve. The flow direction of the refrigerant is just opposite to that during cooling. The refrigerant first passes through the evaporator, then returns to the condenser, and finally returns to the compressor.

Extended information:

Compressor exhaust temperature

The compressor exhaust temperature is much higher than the condensation temperature, and the direct influencing factors of exhaust temperature are is the suction temperature of the compressor, and the two are directly proportional.

In addition, the exhaust temperature is also related to the type of refrigerant and the compression ratio. Under air conditioning conditions, because the compression ratio is not large, the exhaust temperature is not very high. When the suction and exhaust valve plates of the piston compressor are not tight or are broken, causing leakage (internal leakage), the exhaust temperature will rise significantly.

Reference: Baidu Encyclopedia - Chiller