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What are the categories of automotive air conditioning pressure switches?

1 Answers

Gama

07/30/25 2:02am

Automotive air conditioning pressure switches are categorized into high-pressure switches, low-pressure switches, and high-low pressure dual-function composite switches (three-position pressure switches). Below are detailed explanations: 1. Low-pressure protection switch: When there is a leak in the air conditioning system or insufficient refrigerant, this switch forcibly stops the compressor to prevent damage. 2. Intermediate state switch: When the condensing pressure is too high, this switch forces the condenser fan to rotate at high speed, reducing high pressure and enhancing cooling efficiency. 3. High-pressure switch: To prevent excessive system pressure that could lead to system explosions, this switch forcibly stops the compressor. The protection switch is installed on the high-pressure side, with typical values around 2KG, 15KG, and 30KG, varying by vehicle design.

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