What is the refrigeration principle of a car compressor refrigerator?

The refrigeration principle of the car compressor refrigerator is based on the compression cycle, which is a basic refrigeration technology. The following is a detailed explanation of the refrigeration principle of a car compressor refrigerator:

1. Compression: The first step in the refrigeration cycle is compression. In a car compressor refrigerator, this step is accomplished through the compressor. A compressor compresses a refrigerant (usually a gas) into a high-pressure gas. This process increases the temperature and pressure of the gas, allowing it to release heat and cool down in subsequent steps.

2. Condensation: The high-pressure gas flows through the condenser, which is a radiator usually located on the outside of the on-board compressor refrigerator. In a condenser, high-pressure gas comes into contact with the outside environment, causing the gas to release heat and cool down while condensing into a liquid. This process causes the temperature of the gas to drop, but the pressure remains high.

3. Expansion: The condensed liquid refrigerant enters the evaporator through the expansion valve (also called a throttle valve). The function of the expansion valve is to reduce pressure, causing the liquid refrigerant to suddenly relax and expand rapidly, thereby lowering its temperature. This causes the refrigerant to become a low-temperature, low-pressure mixture.

4. Evaporation: The refrigerant evaporates inside the evaporator, absorbing heat from the surrounding environment, thereby reducing the temperature inside the evaporator. In a car compressor refrigerator, the evaporator is usually located inside the refrigerator. When hot air comes into contact with refrigerant, heat is absorbed from the air, causing the refrigerant to evaporate into a gas again.

5. Cycle Repeat: These steps of the cycle are repeated to keep the temperature inside the refrigerator lower than the surrounding environment. When the temperature inside the refrigerator rises, the compressor will restart and start a new compression cycle.

The car compressor refrigerator uses the compression cycle refrigeration principle to absorb and release heat by continuously compressing, condensing, expanding and evaporating the refrigerant, thereby keeping the interior of the refrigerator at a low temperature. This refrigeration principle is the basis for the vehicle-mounted compressor refrigerator to operate reliably in various environmental conditions.