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ABOUT US
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22
2021
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02
The working principle of four-way valve cooling and heating
Speaking of the four-way valve, many people may not know it, but it is an indispensable working part in refrigeration equipment. The four-way valve, as its name suggests, is a control valve with four ports. When the solenoid valve coil inside is de-energized, the spool valve of the four-way valve will move leftward under the action of the pressure spring on the right side. Then the high-pressure gas will enter the capillary tube and transfer to the piston chamber at the right end. Then the gas inside the left cavity will be discharged, and a certain pressure difference will be formed at the left and right ends, so that the exhaust pipe can be connected with the outdoor machinery, and a refrigeration cycle will be formed. However, in the process of using the four-way valve, it is often found that there are faults such as poor reversing or insufficient flow. Next, the editor will tell you about the working principle of the four-way valve in the cooling and heating process.
When the air conditioner is adjusted to the cooling state by people, the four-way valve is not energized at this time, but is in the state of AD connection and BC connection. At this time, the unpopular door will be compressed by the compressor inside the air conditioner and converted into high-temperature and high-pressure air. After passing through the four-way A port, it is discharged from the D port and enters the outdoor condenser. After the heat is released through the heat transfer in the condenser, the temperature will be lowered. After it becomes a liquid, it will become a low-temperature and low-pressure liquid after passing through the expansion valve. Then it will become us after the evaporator absorbs heat and releases cold. The desired low-temperature and low-pressure gas then passes through port B and returns to the inside of the compressor from port C to continue to circulate.
When the air conditioner is adjusted to the cooling state by people, the four-way valve is now energized, and then the piston will move to the right, making the connection between ab and CD. The cold door will be converted into high-temperature and high-pressure air by the action of the compressor, and then discharged from port B through port A, into the condenser, and become medium-temperature and high-pressure air through heat transfer inside the condenser. liquid. After passing through the expansion valve, it will become a low-temperature and low-pressure liquid. After the evaporator absorbs heat and releases cooling, it becomes the low-temperature and low-pressure gas that everyone expects, and then it is sent from port D to port C to continue circulating.
Most air conditioners now adopt new concepts and technologies, and all aspects of the exhaust pipe have been modified to make their cooling and heating more efficient.
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Add.: Dalingshan Town, Dongguan City, Guangdong Province, China
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