The compressor sucks the superheated steam, enters the condenser through the exhaust end to maintain a higher pressure, the high pressure causes the high temperature steam to reach saturation here, exchanges heat with the external environment through the condensation process, the vapor becomes liquid, and further Cool to a subcooled liquid.
The supercooled liquid enters the evaporator through the filter and the capillary. Due to the flow resistance of the capillary, a large pressure drop is maintained at both ends, which causes the pressure inside the evaporator to be low, and the supercooled liquid evaporates from the capillary. After the device, due to the low pressure, the liquid boils here, thereby absorbing a large amount of heat from the outside to achieve the purpose of refrigeration.
In the refrigeration cycle system, at the interface between the condenser and the capillary and the capillary and the evaporator, due to the sudden change in the flow field characteristics, flow sounding occurs, and boiling is caused in the evaporator due to boiling. From the working principle of the refrigeration system, the sound generated when the refrigerant flows in the refrigeration cycle system is mainly the sound-induced sound and the boiling sound, which forms a secondary radiation sound through the pipe wall. Of course, due to the pulsation of liquid or gas in the pipeline, it may also cause the tube wall to vibrate due to the gas-solid disaster and the liquid-solid combination, so that acoustic radiation occurs, which is a possible way of generating refrigerant flow noise.
The surface temperature of the compressor, especially the initial surface temperature, sometimes has a large influence on the noise of each system, and sometimes it has no effect. The difference of the initial temperature of the surface will vary greatly with time, but Over time, the surface temperatures of the compressors tend to be the same value, and the discharge pressure of the compressor tends to the same value as the surface temperature of the compressor increases.
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