Heat pump air conditioning system and control method thereof
A heat pump air conditioner and control method technology, which is applied to air conditioner systems, heating methods, refrigerators, etc., can solve the problems of rising refrigerant temperature, limited cooling effect, and reducing the working performance of the air conditioning system, and avoid frost or freezing. , the effect of prolonging the defrosting cycle
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no. 1 example
[0062] The first embodiment: the system cycle of the heat pump air conditioner of the present invention during heating is as follows figure 1 As shown in the figure, the refrigerant heating device is installed on the compressor discharge port pipeline. After the refrigerant comes out of the compressor discharge port, it passes through the refrigerant heating device, then enters the internal heat exchanger, and then enters the first section after passing through the internal heat exchanger. Flow device 4, a part of the throttled low-temperature and low-pressure refrigerant enters the external machine heat exchanger 1 (main heat exchanger 6) to exchange heat with the outside air, and the other part of the refrigerant passes through the second throttling device 6, and the refrigerant passes through the secondary throttling. Then it enters the second external heat exchanger (defrosting heat exchanger 7) to exchange heat with the outside air. The refrigerant from the external heat e...
no. 2 example
[0082] Second embodiment: The second embodiment of the present invention is to set the refrigerant heating device of the first embodiment on the circuit of the suction port of the compressor. In low temperature conditions, when the heat pump air conditioner is in heating operation, the refrigerant heating device is turned on by controlling the system to increase the suction temperature and exhaust temperature of the compressor, so as to inhibit frost formation and prolong the heating time. Thermal system cycles such as Figure 5 shown. During the defrosting period, when the heat pump air conditioner is running, turn on the refrigerant heating device to increase the suction temperature and exhaust temperature of the compressor, and the high temperature gas can speed up the defrosting speed of the outdoor unit. like Figures 6 to 8 shown.
no. 3 example
[0083] Third embodiment: The third embodiment of the present invention is to set the refrigerant heating device of the first embodiment on the pipeline between the second external heat exchanger (ie, the defrosting heat exchanger 7 ) and the three-way valve. In low temperature conditions, when the heat pump air conditioner is in heating operation, through the control of the system, the refrigerant heating device is turned on to increase the suction temperature and exhaust temperature of the compressor, so as to inhibit frost formation and prolong the heating time. loop like Figure 9 shown. When the heat pump air conditioner is running during defrosting, the refrigerant from the compressor is heated by the refrigerant heating device and then passes through the outdoor heat exchanger 2. The high-temperature gas can speed up the defrosting speed of the outdoor unit, ensure the indoor comfort during defrosting, and improve the heat pump. performance, the system cycle during defr...
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