The role of air conditioning thermistor

Thermistors have two main functions in air conditioning, one is to achieve automatic control of air conditioning comfort, and the other is to protect.

1. Indoor environment thermistor

Most of them are placed in the air intake of the air conditioner, and the value of the air temperature is collected. The CPU is processed to determine which mode to operate or whether it is working. The use of intelligent cream is also compared with the tube temperature to determine whether the cream is defrosting or not.

2. Indoor tube temperature resistance has multiple effects

In addition to achieving comfort (anti-cold wind), it also protects. When heating, for various reasons such as the internal fan stall, the filter is too dirty and the indoor and outdoor temperatures are too high, the indoor unit pressure will be too high, and the indoor condensation temperature will be too high, which is very dangerous. When the indoor tube temperature collected by the CPU is too high, the outdoor fan will be cut off until the press is cut (the random type is different) to protect. When the cooling is performed, the indoor unit is also protected against freezing.

3. Outdoor tube temperature thermistor

It mainly detects the temperature of the outdoor unit condenser to determine whether to start defrosting or to end the defrosting. Now some new models are mainly hang-ups have canceled the outdoor tube temperature sensitivity, using intelligent frost to defrosting.

4. Outdoor environment thermistor.

More common in frequency converters, and some fixed frequency machines. For Gree inverters, the outdoor environment thermistor is mainly the high operating frequency of the chamber press (for example, when heating, if the outdoor temperature is higher, the high frequency will have control).