Fridge compressor how does it work

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Get the Hack. Recent Posts. Nov Oct Sep Here are 4 Reasons Why. Aug The pistons rotate to increase and decrease the volumes of the sections. Continuous rotation achieves gas suction, compression, and discharge. The operation of a rotary vane compressor includes five actions. These actions are; start, suction, compression, discharge then end. Each crankshaft rotation achieves all these five actions.

You can find rotary vane compressors in domestic refrigeration and air conditioning units. They also feature in heat pumps. This compressor uses helical screw rotors to compress larger volumes of refrigerant. The compression involves the motor and the male and female rotors. The motor rotates the male rotor through the crankshaft. The male rotor moves the female rotor as the rotors inter-mesh against each other.

The meshing rotors force the refrigerant through the suction port of the compressor. The compressed refrigerant leaves via the discharge port at a higher pressure. The screw compressor competes with large reciprocation and small centrifugal compressors. You find rotary screw compressors in commercial and industrial refrigeration and air-conditioning systems.

Another name for the centrifugal compressor is the turbo or radial compressor. This machine compresses the refrigerant by kinetic energy though rotating impellers. As the impellers rotate, they force the refrigerant through the inlet vane. The higher the impeller speed, the higher the pressure. The high-pressure refrigerant then passes through the diffuser. As it evaporates, you should feel a chilling sensation - the same basic principle gives us safe food storage.

To start the evaporation process and change the refrigerant from liquid to gas, the pressure on the refrigerant needs to be reduced through an outlet called the capillary tube. The effect is similar to what happens when you use an aerosol product such as hair spray. When you release the contents into the lower pressure open space, it turns from a liquid to a gas.

To keep a refrigerator running, you need to be able to get the gaseous refrigerant back to its liquid state, so the gas needs to be compressed to a higher pressure and temperature again. This is where the compressor comes in. As mentioned earlier, the compressor provides a similar effect to that of a bike pump. You can sense the heat increase in the pump while you pump and compress the air.

Once the compressor has done its work, the gas should be under high pressure and hot. During the condensation stage, the refrigerant enters a condenser and flows through a series of S-shaped tubes.

As the hot vapor flows through the condenser, cool air is blown across the tubes by a fan. Because the air being blown across the tubes is cooler than the refrigerant, heat transfers from the tubing to the cooler air. This heat transfer causes the hot vapor refrigerant to reach its saturated temperature, which then changes its state to a high-pressure liquid. Once the refrigerant is in a high-pressure liquid state, it is ready to leave the condenser and move on to the metering and expansion stage of the cycle.

Stage 3: Metering and Expansion. The third stage of how compression refrigeration systems work consists of the high-pressure liquid refrigerant entering a metering device or expansion valve. The metering device works to maintain high-pressure on the inlet side, while also expanding the liquid refrigerant and lowering the pressure on the outlet side.