The rise of electric vehicles, coupled with overall noise reduction, is increasingly linked to embedded vehicle components. As a result, compressor suppliers are required to reduce the noise of their compressors during vehicle development, making noise reduction a major challenge in the compressor design process.
In addition, development costs have increased significantly as designs increasingly favor larger scroll and rotor compressors. Electric vehicle batteries are large and heavy, which makes it difficult to increase interior space and reduce body weight during vehicle design. It is not only the heat management of the cars that covers the whole process from cooling to heating (the engine no longer heats the cars). Similarly, engineering solutions are needed for engine and battery cooling. In addition, the battery needs to be preheated or pre-cooled.
The working circuit of air conditioning is divided into evaporation area (low pressure area) and condensation area (high pressure area). The indoor unit and outdoor unit of the air conditioner are the low pressure area or high pressure area respectively (depending on the working state). The refrigerant then flows from the high pressure zone to the low pressure zone and is injected through the capillary into the evaporator. The pressure suddenly drops and the liquid refrigerant immediately turns into a gas, absorbing large amounts of heat from the air through the fins. In this way, when the air conditioning compressor is working continuously, the heat at one end of the low pressure area is absorbed into the refrigerant, and then sent to the high pressure area to distribute into the air, playing the role of regulating the temperature.
Automotive air conditioning compressor bearings: working principle
Compressor - condenser - throttling device - evaporator
Similar to the principle of heating and refrigeration, namely reverse Carnot cycle, but different from the principle of refrigeration is the exchange of condenser and evaporator, namely compressor - evaporator - throttling device - condenser. The compressor is the heart of the refrigeration system. Whether it is air conditioning, cold storage, chemical refrigeration process. Compressor is the key link to ensure! Compressors come in many types and forms. According to the principle can be divided into volume type and velocity type, of which volume type is the most common.
How does a compressor compress gas?
Simply put, by changing the volume of gas to complete the process of gas compression and transportation! Any power device basically needs power to do work, and the same is true for compressors, which need motors (motors) to drive them.Positive displacement compressor includes reciprocating piston type and rotary type.
1. Reciprocating piston type through the reciprocating movement of the piston in the cylinder to change the working volume of gas; Piston compressor has a long history and mature production technology.
2. Rotary compressors include rotary compressors with blades (sliding blades) and screw compressors. Now most household air conditioners use rotary compressors; Screw compressors are commonly used in large refrigeration units,
Refrigeration system is mainly divided into several devices:
Compressor - condenser - throttling device - evaporator
The basic principle is that a compressor compresses the refrigerant into a high pressure saturated gas (ammonia or Sherion), and this gaseous refrigerant is condensed by a condenser.
After being throttled by the throttling device, it enters the evaporator to cool the medium for heat exchange. For example, if an evaporator is connected to every room in the building, the serpentine tube in the evaporator will exchange heat with the air, and then blow cold air into the air in the room.
The refrigerant in the serpentine tube of the evaporator is converted to low-pressure steam after heat exchange, and then returned to the compressor, where it is compressed, thus completing the refrigeration system through this cycle.
2023-01-06