Temperature sensors of the evaporator, compressor and air conditioner freon

The evaporator, compressor, expansion valve and condenser are the basis of the refrigeration circuit of any air conditioner. Copper pipes pass between them - a freon route.

A / C evaporator temperature

When evaporating, the liquid absorbs heat - on the basis of this law, all air conditioners in the world work. The temperature of the air conditioner evaporator depends on the temperature of the freon filling the refrigeration line. The evaporator tubes are blown with atmospheric air. Freon itself in a liquefied form enters here and takes away the heat of the air, expanding, passing into the gaseous phase. Therefore, the evaporator is the coolest place in the air conditioner. The air cools down, the temperature of the air conditioner evaporator is from 8 to 16 degrees.

This air cooling cycle takes place in air conditioners of any brand.

A problem can arise if the freon in the evaporator does not completely evaporate. Then the temperature of the refrigerant is much higher. Liquid enters the compressor and cannot be compressed. Therefore, the compressor may break. The factors leading to such a situation may be the inclusion of the air conditioner at subzero temperatures, clogging of the filters of the indoor module.

The air conditioner evaporator temperature sensor controls the cooling capacity of the air supplied to the room. The A / C evaporator temperature sensor stops compressor operation when the evaporator temperature is too low. Typically, shutdown occurs when the evaporator temperature drops below normal by 2 degrees. If there is not enough freon or the evaporator is not sufficiently blown with air, frost and ice accumulate on it.

Air conditioner condenser temperature

The compressor is necessary to compress the refrigerant supplied through the refrigeration line, as well as to move it further to the condenser.

At the inlet to the condenser, freon enters in a gaseous state, its pressure is 3.5 - 5 atmospheres, the temperature is about 13 - 15 degrees. Here the refrigerant is compressed, as a result of which its temperature increases to 65 - 85 degrees, and the pressure to 25 atmospheres. Thus, the outlet temperature of the air conditioner compressor can reach 90 degrees. At the inlet, the air conditioner compressor temperature is only 15 degrees.

Air conditioning compressors are characterized by freon volume and compression ratio.

Since the price of a compressor is often 80% of the cost of the entire air conditioner, its condition must be closely monitored. Compressor breakdowns, including changes in temperature inside it, are most often associated with illiterate operation or improper installation of the outdoor module.