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An air heat pump air conditioning system and its control method

An air heat pump and air-conditioning system technology, applied in air-conditioning systems, heating methods, space heating and ventilation, etc., can solve the problems of high oil return temperature of the compressor, lower indoor temperature, and poor stability of compressor safe operation, etc. Small impact, good user experience, and the effect of ensuring safe and stable operation

Active Publication Date: 2018-08-14
QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] An object of the present invention is to propose an air heat pump type air conditioning system to solve the problem that the air conditioner in the prior art needs to switch to the cooling mode when defrosting the outdoor heat exchanger during the heating operation in winter, causing the indoor temperature Reduced, poor user experience
[0007] Another object of the present invention is to propose an air heat pump type air conditioning system to solve the problems in the prior art that the oil return temperature of the compressor is high, the impact on the compressor is strong, and the stability of the safe operation of the compressor is poor.
[0008] Another object of the present invention is to propose a defrosting control method for an air heat pump type air-conditioning system. Frost process, to solve the defrosting process needs to be converted to refrigeration mode in the prior art, the problem of poor user experience

Method used

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  • An air heat pump air conditioning system and its control method
  • An air heat pump air conditioning system and its control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like 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 betwee...

Embodiment 2

[0035] like 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 101...

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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Abstract

The invention relates to the field of air conditioners and discloses an air heat pump type air-conditioning system and a control method thereof. The air heat pump type air-conditioning system comprises a compressor, an indoor heat exchanger, a throttling valve, an outdoor heat exchanger, a gas return valve and a gas-liquid separator, wherein the compressor, the indoor heat exchanger, the throttling valve, the outdoor heat exchanger, the gas return valve and the gas-liquid separator are connected in sequence. A gas outlet of the gas-liquid separator is connected with a gas inlet of the compressor, so that a loop is formed. A defrosting electromagnetic valve is connected between a pipeline located between the outdoor heat exchanger and the gas return valve and a gas outlet of an oil separator. An oil drainage port of the oil separator is connected with one end of an oil return sleeve. The other end of the oil return sleeve is connected with a gas inlet of the gas-liquid separator. According to the air heat pump type air-conditioning system and the control method thereof, defrosting of an outdoor unit can be achieved without switching to a refrigerating mode in the heating process, so that the heating state is kept in a room all the time in the defrosting process, the indoor temperature is not decreased, and user experience is better.

Description

technical field [0001] The invention relates to the field of air conditioning, and more specifically discloses an air heat pump type air conditioning system and a control method thereof. Background technique [0002] When the air heat pump unit is in heating operation in winter, frost will gradually form on the surface of the outdoor heat exchanger. As the thickness of the frost layer increases, the heat transfer coefficient of the heat exchanger decreases, thereby reducing the heating capacity. Defrost operation of the outdoor heat exchanger is required. [0003] In the prior art, the main defrosting technology mainly adopts four-way valve reversing reverse cycle defrosting and bypass defrosting. The four-way reversing valve is used for reverse cycle defrosting, the high pressure and low pressure change drastically, which has a strong impact on the compressor, and the functions of the two heat exchangers are continuously switched, which destroys the thermal stability of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F5/00F24F11/89F25B47/02
Inventor 战杰李添龙王冬丽王海胜张铭张晓迪毛守博卢大海宋德跃吴亚雄
Owner QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
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