While heat pumps and conventional air conditioners differ, they rely on the same principals to condition inside air temperatures. ... The main difference between the two systems is that a heat pump can reverse the process by switching the function of the evaporator and condenser coils to raise inside temperatures.
The refrigeration unit has only a single cooling and cooling effect. The main components of the system are the compressor, the condenser, the throttling unit and the evaporator. The refrigerant flows in one direction in the evaporator and the condenser. The heat exchange area of the evaporator and condenser of the refrigeration unit can be appropriately reduced, and the compressor capacity can also be appropriately selected to achieve a balance by increasing the air volume of the condenser fan and the evaporator fan. Most of the refrigeration unit system piping does not require the presence of a liquid storage tank, and the gas-liquid separator is not a necessary component.
In addition to compressors, condensers, throttling components, and evaporators, the heat pump unit has a very important component, the four-way reversing valve, for system operation. The switching of the cooling and heating mode of the heat pump unit is realized by switching the four-way reversing valve. In the short time of the heat pump unit mode switching four-way switching valve switching, there will be more liquid refrigerant flowing to the compressor, in order not to cause the liquid pressure of the compressor, preventing the liquid refrigerant from directly returning to the compressor, in the compressor suction pipe On the road, you need to increase the size of the gas-liquid separator. The refrigerant flow required for the heating operation of the unit is smaller than the refrigerant flow required for the cooling operation. Excessive refrigerant needs to have a special liquid storage tank for storage. The special heat storage tank is provided in the heat pump unit system.
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