Air heat pump type air-conditioning system and control method thereof
An air heat pump and air-conditioning system technology, applied in air-conditioning systems, heating methods, space heating and ventilation, etc., can solve problems such as high oil return temperature of compressors, poor stability of compressor safe operation, strong impact of compressors, etc., to achieve Good user experience, safe and stable operation, and reduced impact
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Embodiment 1
[0029] Such as figure 1 As shown, it is an air heat pump type air conditioning system proposed in this embodiment, which includes a compressor 1, an indoor heat exchanger 2, a throttle valve 3, an outdoor heat exchanger 4, an air return valve 7 and a gas-liquid separation system connected in sequence. The air outlet of the gas-liquid separator 5 is connected with the air inlet of the compressor 1 to form a circuit.
[0030] A defrost solenoid valve 8 is connected between the pipeline between the outdoor heat exchanger 4 and the air return valve 7 and the air outlet of the oil separator 6, and the oil discharge port of the oil separator 6 is connected to one end of the oil return sleeve 10. connect.
[0031] As a further embodiment, the oil return casing 10 includes an air pipe 101, an oil pipe 102 and a throttling device 103 connected to the oil pipe 102. The oil pipe 102 and the throttling device 103 are sleeved inside the air pipe 101. The throttle valve 9 is connected bet...
Embodiment 2
[0035] Such as figure 2 As shown, it is a connection structure of an air heat pump air conditioning system proposed in this embodiment, which includes a compressor 1', an indoor heat exchanger 2', a throttle valve 3', an outdoor heat exchanger 4', The gas return valve 7' and the gas-liquid separator 5', the gas outlet of the gas-liquid separator 5' are connected with the inlet of the compressor 1' to form a circuit.
[0036] A defrosting solenoid valve 8' is connected between the pipeline between the outdoor heat exchanger 4' and the air return valve 7' and the air outlet of the oil separator 6', the oil discharge port of the oil separator 6' and the oil return sleeve One end of the tube 10' is connected.
[0037] As a further embodiment, the oil return casing 10' includes an air pipe 101', an oil pipe 102' and a throttling device 103' connected to the oil pipe 102', and the oil pipe 102' and the throttling device 103' are sleeved on the air pipe 101'. Inside, the air pipe ...
Embodiment 3
[0041] This embodiment proposes a defrosting control method for an air heat pump air conditioning system, which is used to control the air heat pump air conditioning system in Embodiment 1, such as figure 1 shown.
[0042]When the air heat pump air conditioning system in Embodiment 1 is used for defrosting operation, the defrosting solenoid valve 8 is opened, the air return valve 7 is closed, and the heating branch and the defrosting branch run simultaneously.
[0043] Wherein, the air outlet of the oil separator 6, the defrosting solenoid valve 8, the outdoor heat exchanger 4, the throttle valve 3, the defrosting throttle valve 9, and the gas pipe 101 of the oil return sleeve 10 are connected in sequence to form a defrosting branch circuit.
[0044] The air outlet of the oil separator 6, the indoor heat exchanger 2, the defrosting throttle valve 9, and the air pipe 101 of the oil return sleeve 10 are connected in sequence to form a heating branch.
[0045] After the refriger...
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