Should I turn on AC and recirculation mode when using cold air in car air conditioning?

1 Answers
Douglas
07/30/25 10:18am
When initially turning on the air conditioning, using recirculation mode can cool the car interior faster. However, you should switch back to fresh air mode after a while because prolonged use of recirculation mode may cause window frosting. Below is relevant information: 1. Principle of air conditioning refrigeration: The compressor inhales and compresses low-pressure refrigerant vapor in the refrigeration system into high-pressure vapor, which is then discharged to the condenser. Indoor air continuously circulates to lower the temperature. 2. Principle of air conditioning heating: Based on heat source types, car heating systems are mainly divided into two types: one uses engine coolant as the heat source, while the other uses fuel as the heat source. When the engine coolant temperature is high, the coolant flows through the heat exchanger in the heating system, exchanging heat with air delivered by the blower. The heated air is then sent into the car through various vents by the blower.
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