How automotive condensers work
When the refrigerant enters the evaporator, the pressure is reduced, and the high-pressure gas becomes a low-pressure gas. This process needs to absorb heat, so the surface temperature of the evaporator is very low, and then the cold air can be blown out by the fan. The high pressure and high temperature refrigerant from the compressor is cooled to high pressure and low temperature. Then it is vaporized by capillary tube and evaporated in the evaporator.
Classification of automotive condensers
According to the different types of cooling media, condensers can be classified into four categories, and their functions are as follows:
(1) Evaporation-condensing type: In this type of condenser, the cooling effect generated by the evaporation of the refrigerant in another refrigeration system is used to cool the refrigerant vapor on the other side of the heat transfer partition, and the latter is condensed and liquefied. Such as the evaporate-condenser in cascade refrigerators.
(2) Air-cooled (also called air-cooled): In this type of condenser, the heat released by the refrigerant is taken away by the air. The air can be natural convection or forced flow with a fan. This type of condenser is used for Freon refrigeration equipment in places where water supply is inconvenient or difficult.
(3) Water cooling type: In this type of condenser, the heat released by the refrigerant is taken away by the cooling water. Cooling water can be used for one-time use or recycled. Water-cooled condensers can be divided into vertical shell and tube type, horizontal shell and tube type and casing type according to their different structural types.
(4) Water-air cooling type: In this type of condenser, the refrigerant is cooled by water and air at the same time, but it mainly relies on the evaporation of cooling water on the surface of the heat transfer tube to absorb a large amount of heat from the refrigerant side As the latent heat of vaporization of water, the role of air is mainly to take away water vapor to accelerate the evaporation of water. Therefore, the water consumption of this type of condenser is very small, and it is the preferred type of condenser for areas with dry air, low water quality, low water temperature and insufficient water. This type of condenser can be divided into two types: evaporate type and shower type according to their different structures.
