The condenser is used to release heat. The refrigerant is compressed by the compressor to the condenser, and the end of the condenser has capillaries. The capillary will generate resistance to liquefy the gaseous refrigerant compressed by the compressor to achieve the effect of heat release. The condenser is high pressure and will only be hot. The evaporator will be cold, and the liquid refrigerant in the condenser will be rapidly vaporized after passing through the capillary tube to the evaporator, and the evaporation will absorb heat to achieve the cooling effect. Cooling and heat are generated in this way.
The structure of the condenser develops from the tube sheet type to the tube belt type, and mainly develops to the parallel flow type. The internal structure of the stacked and parallel flow type is continuously developed to further improve the heat exchange efficiency and reduce the weight. The parallel flow type condenser has developed from the unit parallel flow type to the multi-parallel flow type. Due to the measures taken to reduce the thickness of the fins, increase the fins in the tube, cut the fins, change the shape and opening angle of the fins, etc., the heat dissipation area of the fins has been increased, and the heat exchange efficiency of the gas side and the liquid side has been strengthened.
For the failure of condenser blockage, it is generally not very common. On some older vehicles, because of the increasing amount of impurities in the air conditioning system, impurities may accumulate in the corners of the condenser, forming an orifice similar to an orifice tube, blocking the flow of refrigerant.
To judge such problems, it is very simple to measure the temperature of each layer of condenser from top to bottom according to the flow direction of the condenser; the temperature of the normal condenser gradually decreases from high to low from the upper layer to the lower layer. There should be a significant temperature change; if we find a significant temperature change between the two layers, then there should be a blockage inside, creating a throttling.
For the heat dissipation effect of the condenser, it is not necessarily that the condenser itself is dirty, but it may be the poor heat dissipation caused by the dirty water tank. On our common vehicles, the condenser is generally arranged in front of the water tank. In many cases, the dirt in the air will accumulate between the condenser and the water tank, especially in front of the water tank, there will be a lot of flocculent blockages, which will affect the cooling airflow. . This leads to poor heat dissipation of the condenser and poor cooling effect of the air conditioning system.