An air source heat pump unit and its electronic expansion valve control method and device
An electronic expansion valve, air source heat pump technology, applied in refrigeration and liquefaction, refrigerators, compressors and other directions, can solve the problems of high exhaust temperature of electronic expansion valve, affecting the comfort of user room, etc., to improve indoor comfort, The effect of preventing exhaust high temperature protection and prolonging the service life
Active Publication Date: 2019-08-16
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0004] The embodiment of the present invention provides an air source heat pump unit and its electronic expansion valve control method and device to solve the problem that the existing heat pump unit is prone to high exhaust gas temperature caused by too small opening of the electronic expansion valve during high-frequency operation. , problems that affect the user's indoor comfort
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[0018] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described through implementation with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the embodiment of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0019] Such as figure 1 Shown is a schematic diagram of an air source heat pump unit provided by an embodiment of the present invention. The air source heat pump unit 100 provided in this embodiment at least includes a compressor 110 , a heat exchanger 120 , an electronic expansion valve 130 and a control device 140 , and the control device 140 controls...
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The embodiment of the present invention discloses a control method and device for an air source heat pump unit and its electronic expansion valve. The control method includes: obtaining the discharge temperature of the compressor in real time and judging whether the discharge temperature is greater than the target limit temperature; if not, Obtain the suction superheat degree of the heat exchanger and control to adjust the opening degree of the electronic expansion valve according to the suction superheat degree; if so, obtain the exhaust superheat degree of the compressor and control to adjust the opening degree of the electronic expansion valve according to the exhaust superheat degree. In the embodiment of the present invention, controlling the opening of the electronic expansion valve according to the degree of suction superheat can ensure that the air source heat pump unit has better operating capability and higher energy efficiency; controlling the opening of the electronic expansion valve according to the degree of exhaust superheat can ensure Preventing the air source heat pump unit from frequent exhaust high temperature protection can also ensure the stable and reliable operation of the air source heat pump unit under the condition of low temperature operation, improve the indoor comfort of users, and prolong the service life of the air source heat pump unit.
Description
technical field [0001] Embodiments of the present invention relate to low-temperature heating technology, and in particular to an air source heat pump unit and a control method and device for an electronic expansion valve thereof. Background technique [0002] At present, as the problem of environmental pollution is becoming more and more serious, people are paying more and more attention to environmentally friendly low-temperature heating technology in order to replace traditional heating such as coal furnace heating and central heating. With the gradual maturity of low-temperature air-source heat pump technology, low-temperature air-source heat pump heating technology with energy-saving and environmental protection advantages is gradually replacing traditional heating methods. [0003] When the existing low temperature air source heat pump unit is in operation, the ambient temperature on the evaporation side is low, so the circulation volume of refrigerant in the whole uni...
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IPC IPC(8): F25B13/00F25B41/06F25B49/02F25B41/34
CPCF25B13/00F25B49/02F25B2600/2513F25B41/34F25B41/31Y02B30/70
Inventor 孟红武李桂强谷月明姚鸿海宋鹏曾凡卓王晓红朱新刘磊
Owner GREE ELECTRIC APPLIANCES INC