Defrosting control method and device for heat pump system
A technology of a heat pump system and control method, which is applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., and can solve problems such as large temperature fluctuations, affecting the service life of four-way valves, and affecting system operation reliability, and achieve rapid defrosting , the effect of small fluctuations
Active Publication Date: 2015-05-27
MIDEA GRP CO LTD
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[0003] However, since the outdoor heat exchanger absorbs heat from the outdoor air, the temperature around the outdoor heat exchanger is low, and the water vapor in the air will condense into frost and adhere to the surface of the outdoor heat exchanger, thereby affecting the heat exchange capacity of the outdoor heat exchanger , thereby affecting people's comfort
[0004] In order to solve the defrosting problem of the above-mentioned air conditioner, four-way valve reversing control is mostly used at present. It starts to absorb heat, causing large fluctuations in the temperature of the indoor room, generally 8-10°C.
Although it can solve the defrosting problem, the temperature fluctuates greatly, and it affects the service life of the four-way valve and the reliability of the system operation
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[0052] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0053] The heat pump system in the defrosting control method for the heat pump system proposed in the embodiment of the present invention will be described by taking an air conditioning system as an example. like figure 1As shown, the air conditioning system includes a four-way valve 1, an indoor heat exchanger 2, a bypass solenoid valve 3, a throttling device 4, an outdoor heat exchanger temperature sensing package 51, an outdoor heat exchanger temperature sensing package 52, an outdoor heat exchange Device 6, compressor body 7, compressor accumulator 8, compressor exhaust port 71, compressor accumulator air inlet 81. Wherein, the temperature sensing package 51 of ...
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The invention discloses a defrosting control method for a heat pump system. The method comprises the steps of detecting whether the heat pump system meets defrosting entry conditions in real time; determining whether defrosting of the last defrosting period is quit because the defrosting continuous running time is larger than t1 time when the heat pump system meets the defrosting entry conditions; entering four-way valve reversing defrosting when the defrosting of the last defrosting period is quit because the defrosting continuous running time is larger than t1 time, and quitting defrosting when four-way valve reversing defrosting quitting conditions are met to enter bypass defrosting, quitting defrosting when bypass defrosting quitting conditions are met to enter a normal heating mode. The invention further discloses a defrosting control device for the heat pump system. By means of the method and the device, rapid defrosting and clean defrosting can be achieved, and the indoor temperature fluctuation is small during defrosting.
Description
technical field [0001] The invention relates to the field of heat pump systems, in particular to a defrosting control method and device for a heat pump system. Background technique [0002] During the heating operation of the heat pump air conditioner, the refrigerant exchanges heat with the outdoor air through the outdoor heat exchanger, absorbs heat from the outdoor air and evaporates. The compressor compresses the low-temperature and low-pressure refrigerant to form high-temperature and high-pressure refrigerant vapor, which enters the indoor heat exchanger to release heat. Heat is released through the indoor heat exchanger to heat the indoor air, making people enjoy a more comfortable environment. [0003] However, since the outdoor heat exchanger absorbs heat from the outdoor air, the temperature around the outdoor heat exchanger is low, and the water vapor in the air will condense into frost and adhere to the surface of the outdoor heat exchanger, thereby affecting th...
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IPC IPC(8): F25B47/02F25B49/02
CPCF24F11/30F24F11/41F24F11/89
Inventor 张桃席战利
Owner MIDEA GRP CO LTD
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