auto air conditioning compressor rebuild kits

Suzhou Zhongcheng New Energy Technology Co., Ltd. is a manufacturer of automotive air-conditioning compressors. For many years, it has been specialized in the production, research and development and processing services of automobile air-conditioning compressors. Stable quality and professional services have been recognized and supported by customers in more than 30 countries/regions around the world. In order to meet customer needs and better serve customers, with the globalization of the world and the development of the Internet, the company has gradually realized the diversification of online and offline sales, so that customers can have a better shopping experience. 

The following briefly introduces the working principle, function and main types of automobile air conditioning compressors:

The working principle of the automobile air-conditioning compressor, in short, the compressor compresses the refrigerant into a high-temperature and high-pressure vapor and sends it to the condenser (in the car's network and the water tank, which are not often installed in front of the water tank) to dissipate heat (this point should be paid attention to) The refrigerant only changes its state and the energy it possesses. After the heat is dissipated, it flows out as a high-temperature and high-pressure liquid, and enters the drying bottle. The drying bottle mainly kicks out the water. Then enter the evaporation box. The evaporator has an expansion valve to convert the high-temperature and high-pressure liquid into a low-temperature and low-pressure vapor. The liquid becomes the vapor and absorbs part of the heat. Therefore, the temperature of the evaporator is very low and takes away the heat in the car. The refrigerant from the evaporator box flows back to the compressor.

The role of the automobile compressor is to transform the low-temperature, low-pressure gaseous refrigerant from the evaporator into a high-temperature, high-pressure gaseous refrigerant through compression, and send it to the condenser. Simply speaking, there is a cylinder inside the car air-conditioning compressor. The cylinder has a one-way valve made of very thin steel sheet and sealed with refrigerated oil. Usually the compressor does not work when the engine is rotating, and only when the air conditioner is turned on does the electromagnetic clutch draw the compressor and the pulley, and the cylinder compresses the refrigerant to circulate.

The main meaning is that the air conditioner does not create cold, but takes the tropics inside the car to the outside, which is a kind of energy transfer.

Types of car air-conditioning compressors

At present, there are many types of compressors used in automobile air conditioning systems. The more common ones are swash plate compressors, vane compressors, scroll compressors, crankshaft connecting rod compressors, and so on. In addition, the compressor can also be divided into two types of fixed displacement and variable displacement. The variable displacement compressor can automatically change the displacement according to the refrigeration load of the air conditioning system, making the air conditioning system run more economical.

1. Rocking plate compressor

Structure: This compressor is a variable displacement compressor. Its structure is similar to that of a swash plate compressor. The circumferentially distributed pistons are driven by the swash plate, but the two-way pistons are changed into one-way pistons. By changing the angle of the swash plate to change the stroke of the piston, thereby changing the displacement of the compressor. When the compressor rotates, the compressor shaft drives the flange plate connected to it, the guide pins on the flange plate then drive the swash plate to rotate, and the swash plate finally drives the piston to reciprocate.

Working principle process: The working process of compressing refrigerant will not be repeated here. Here we mainly introduce the principle of variable displacement. This kind of compressor can change the displacement according to the size of the cooling load. When the cooling load is reduced, the swash plate can be changed. The angle is reduced, reducing the stroke of the piston and reducing the displacement. The opposite is true when the load increases. Let’s take load reduction as an example to illustrate how the compressor displacement is reduced. The reduction in refrigeration load will reduce the pressure in the low-pressure chamber of the compressor, and the reduced pressure in the low-pressure chamber can expand the bellows and open the control valve. The refrigerant in the high-pressure chamber It will enter the swash plate cavity through the control valve, and the pressure in the swash plate cavity will increase.

2. Crankshaft connecting rod compressor

Structure: The structure of this compressor is similar to that of the engine. The piston is driven by the crankshaft connecting rod to reciprocate. Generally, it adopts a double-cylinder structure, and each cylinder is equipped with intake and exhaust valves.

Working principle process: The whole working process is composed of three processes of suction, compression and exhaust. When the piston moves down, the intake valve opens, the refrigerant enters the cylinder, and when the piston moves up, the refrigerant is compressed, and when a certain pressure is reached, exhaust The valve opens and the refrigerant is discharged. Due to its large size, this type of compressor has rarely been used in small cars at present.

3. Swash plate compressor

This type of compressor usually has 6 or 10 cylinders arranged in the circumferential direction of the body, each cylinder is equipped with a bidirectional piston to form a 6-cylinder engine or a 10-cylinder engine, and each cylinder has an intake valve and an exhaust valve at both ends. The piston is driven by the swash plate to reciprocate in the cylinder. When one side of the piston is compressed, the other side is intake air.

Working principle process: When the compressor shaft rotates, the swash plate on the shaft drives all the pistons at the same time, some pistons move to the left, and some pistons move to the right. When the piston moves to the left, the space on the left side of the piston shrinks, the refrigerant is compressed, the pressure rises, the exhaust valve is opened, and it is discharged outward. At the same time, the space on the right side of the piston increases, the pressure decreases, and the intake valve turn on, the refrigerant enters the cylinder. Since the intake and exhaust valves are of one-way valve structure, it is ensured that the refrigerant will not flow back.

The working principle, function and main types of automobile air-conditioning compressors are simply this. If you want to know more information about auto air-conditioning accessories, please contact Suzhou Zhongcheng New Energy Technology Co., Ltd. We can confirm the product for you and provide you with exclusive professional services.