Maintain and debug multi split air conditioners, first understand the composition and function of these components

1. Compressor
As the "heart" of the refrigeration system, the compressor achieves refrigerant circulation through mechanical work. Its working principle is to suck in low-temperature and low-pressure gaseous refrigerant, compress it and discharge high-temperature and high-pressure gaseous refrigerant, providing continuous power for the entire refrigeration cycle.

2. Compressor heating belt
This device uses electric heating to increase the temperature of the compressor body, promoting the complete vaporization of residual liquid refrigerant and effectively avoiding liquid hammer during compressor start-up. Typical application scenarios include: the first power on operation of a new machine and the restart phase after a long-term winter shutdown

3. Compressor exhaust temperature sensor
Real time monitoring of compressor exhaust temperature, triggering protection mechanism when the temperature approaches the safety threshold, and preventing compressor damage due to exhaust overheating by adjusting system operating parameters

4. High voltage switch
When the exhaust pressure of the system exceeds the set value, the high-pressure switch immediately cuts off the power supply of the whole machine, forming mechanical protection for the compressor to prevent equipment damage caused by abnormal pressure

5. One way valve
Adopting a spring type valve core structure to achieve one-way refrigerant conduction function, the main functions include:
a. Prevent refrigerant backflow during shutdown
b. Block high-pressure gas backflow compressor
c. Auxiliary compressor suction and discharge pressure balance

Shanghai KUB Refrigeration Equipment Co., Ltd.

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