Air conditioner defrosting control method and device
A control method and a technology of a control device, which are applied to the control input related to air characteristics, space heating and ventilation control input, heating and ventilation control system, etc., and can solve the problems of cold air blowing, pressure imbalance, and heat exchange efficiency of heat exchangers Reduce and other problems, to achieve the effect of maintaining pressure balance
Active Publication Date: 2019-08-27
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
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Problems solved by technology
[0002] When the household heat pump air conditioner is heating in winter, the outdoor heat exchanger acts as an evaporator to absorb heat. When the outdoor ambient temperature is too low or the heating operation time is too long, the temperature of the refrigerant pipe of the outdoor heat exchanger will be lower than At zero temperature, the moisture in the outdoor air condenses into frost or even freezes on the surface of the outdoor heat exchanger. Frosting on the outdoor heat exchanger will reduce the heat exchange efficiency of the heat exchanger, thereby affecting the indoor heating effect. Therefore, the heat pump air conditioning system needs Perform defrosting
[0003] The defrosting method of the existing heat pump air conditioner usually adopts the four-way valve reversing method to switch from the heating mode to the cooling mode. The high-temperature and high-pressure refrigerant discharged from the compressor enters the heat exchanger of the outdoor unit and is connected with the outdoor The frost layer on the heat exchanger of the outdoor unit is used for heat exchange to achieve the purpose of defrosting. However, due to the reverse operation of the cooling mode, each defrosting of the outdoor unit needs to absorb heat from the indoor through the indoor heat exchanger, and the indoor temperature will change with time. With the progress of the defrosting process, it will gradually decrease. When the temperature is low, it will cause cold air to blow out from the air outlet of the indoor unit, which will seriously affect the comfort of the heat pump air conditioner.
[0004] In order to solve the problem of blowing cold air, in the prior art, the indoor fan is generally turned off directly when the four-way valve is switched. Since the indoor unit operates in heating mode before the four-way valve is switched, after the indoor fan is turned off, the heat of the indoor unit It is still relatively high, causing the pressure of the indoor unit to increase in a short period of time, which in turn causes the compressor to start up again due to pressure imbalance, which leads to failure to start and normal defrosting
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[0034] It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0035] The invention provides a defrosting control method for an air conditioner. refer to figure 1 As shown, it is a flow chart of the first embodiment of the defrosting control method for the air conditioner of the present invention.
[0036] In this embodiment, the defrosting control method of the air conditioner includes:
[0037] In step S10, during the defrosting process of the outdoor heat exchanger of the air conditioner, the temperature of the indoor heat exchanger of the air conditioner is acquired in real time or periodically.
[0038] It should be noted that the defrosting control method for an air conditioner proposed in this embodiment is applicable to an air conditioner with a heating function, such as a heat pump air conditioner. In the following embodiments, the defrosting control method is d...
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The invention discloses a defrosting control method and device for an air conditioner. The method includes the steps that in the defrosting process of an outdoor heat exchanger of the air conditioner, the temperature of an indoor heat exchanger of the air conditioner is obtained in real time or at regular time; the rotation speed of an indoor fan and / or the air outlet angle of an air deflector are / is adjusted according to the temperature of the indoor heat exchanger, and the lower the temperature of the indoor heat exchanger is, the smaller the rotation speed of the indoor fan is, and the air outlet angle of the air deflector is. The invention further provides a defrosting control device for the air conditioner. The defrosting control method and device for the air conditioner avoid the situation that during defrosting of the air conditioner, the indoor fan blows out cold air, and then the comfort of the air conditioner is affected, and meanwhile avoid a starting failure during mode switching of a compressor.
Description
technical field [0001] The present invention relates to the technical field of air conditioners, and in particular, to a defrosting control method and device for an air conditioner. Background technique [0002] When the household heat pump air conditioner operates for heating in winter, the outdoor heat exchanger acts as an evaporator to absorb heat. When the outdoor ambient temperature is too low or the heating operation time is too long, the temperature of the refrigerant pipe of the outdoor heat exchanger will be lower than At zero degrees, the moisture in the outdoor air condenses into frost or even freezes on the surface of the outdoor heat exchanger. After the outdoor heat exchanger is frosted, the heat exchange efficiency of the heat exchanger will be reduced, thereby affecting the indoor heating effect. Therefore, the heat pump air conditioning system needs Perform defrosting. [0003] The defrosting method of the existing heat pump air conditioner usually adopts t...
Claims
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IPC IPC(8): F24F11/42F24F11/65F24F11/64F24F11/84F24F11/79F24F110/10
CPCF24F11/30F24F11/42F24F11/62F24F11/77F24F11/79F24F2110/10Y02B30/70
Inventor 陈华伟
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD