Refrigeration Compressor, An-Overview

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What is Refrigeration Compressor?

The compressor is the main part of the refrigeration system. The compressor acts like a pump and passes the refrigerator through the system. The temperature sensor starts the compressor. The cooling system cools objects through repeated cooling cycles.

The cooling cycle is a continuous process. The refrigerator moves from the compressor to the condenser, through the meter, to the evaporator, then the cycle repeats.

The refrigeration compressor receives low-pressure gas from the evaporator and, as the name suggests, is converted to high-pressure gas by pressure. As the gas is compressed, the temperature rises.

The hot refrigerant gas then flows into the condenser. A condenser is a heat exchanger that uses a refrigerant (usually ambient air) to cool the refrigerant. When the refrigerator passes through this heat exchanger, it flows into a hot liquid. The refrigerant exits the condenser and enters the system metering device.

The metering device can be an expansion valve or a capillary tube to create a pressure drop. As mentioned above, the temperature and boiling point of a liquid decrease as the pressure decreases. Part of the refrigerant evaporates and the temperature of the liquefied petroleum gas decreases. The cold refrigerator then flows into the evaporator.

The evaporator is another type of heat exchanger that allows heat to be transferred between a heat source and a refrigerator. In colder conditions, the heat source is the refrigerant flowing through the equipment. The refrigerator enters the evaporator as a mixture of gas and liquid at a low temperature.

Working of Refrigeration Compressor

A refrigeration compressor works in the following way:

Step 1: Compression

In the first phase of the refrigeration cycle, the refrigerant enters the compressor in the form of low-pressure vapor. The compressor compresses the high-pressure vapor refrigerant, which causes it to overheat. When the refrigerator is compressed and heated, it exits the compressor and enters the next stage of the cycle.

Step 2: Condensation

After leaving the refrigeration compressor, the hot steam refrigerator enters the next phase of rotation, namely condensation. In the condensation phase, the refrigerant enters the condenser and passes through a series of S-shaped tubes; when the hot vapor passes through the condenser, the cold air blower passes through the tube.

Since the air blown into the tube is colder than the refrigerant, the heat is transferred from the tube to the colder air. This heat transfer is caused by the hot refrigerator vapor reaching saturation temperature and then changing its state to a high-pressure liquid. When the refrigerant is in the liquid state at high pressure, it can exit the condenser and enter the measurement and expansion phase of the rotation.

Step 3: Metering and expansion

The third stage in the operation of the compression refrigeration system involves the entry of high-pressure refrigerant into the metering device or expansion valve. The function of the metering device is to maintain a large pressure at the inlet, increasing the refrigerant and decreasing the inlet and outlet pressure. During the expansion process, the temperature of the refrigerant also decreases.

Step 4: Evaporation

In the low-pressure liquid state, the refrigerant is now ready to enter the evaporation phase, where heat is eventually released from the air conditioner.

During the evaporation phase, the cold refrigerant exits the meter and enters the evaporator coil. A fan is then used to blow hot air from the air conditioner through the evaporator coil. The cooler refrigerator in the evaporator coil begins to receive heat from the warmer air, thus lowering the temperature of the air conditioning environment.

At the same time, when the refrigerator absorbs heat from the air, it starts boiling and turns into low-pressure steam. The low vapor pressure is then returned to the compressor and rotation resumes.

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