Air conditioner and control method thereof
A control method and air conditioner technology, which is applied to the control input related to the system state, the space heating and ventilation control input, the heating and ventilation control system, etc., and can solve the vibration of the unit, the drastic change of high and low pressure, and the damage of the four-way valve, etc. question
Pending Publication Date: 2022-04-26
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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Problems solved by technology
[0004] The present invention provides an air conditioner and its control method, which solves the problems of large high and low pressure differences before switching of the four-way valve, high and low pressure balance at the moment of switching, and re-establishment of high and low pressure after switching when the existing air conditioner enters into defrosting or exits from defrosting. Leading to drastic changes in high and low pressure, resulting in technical problems such as unit vibration, excessive pipeline stress, and damage to the four-way valve
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[0039] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0040] In the description of this application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying Refe...
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The invention relates to an air conditioner and a control method thereof.The air conditioner comprises a compressor, a four-way valve, an outdoor heat exchanger, a throttling device and an indoor heat exchanger, the air conditioner comprises a control module, the control module is configured to enter a front pressure difference control stage after obtaining a defrosting instruction in a heating mode, and when a front pressure difference ending condition is met, the defrosting instruction is started; and controlling the four-way valve to reverse to enter a defrosting control stage, entering a post-pressure-difference control stage when a defrosting ending condition is met, and controlling the four-way valve to reverse to end defrosting control when a post-pressure-difference ending condition is met. According to the air conditioner, the front pressure difference control is carried out after the defrosting instruction is obtained, the rear pressure difference control is carried out when the defrosting ending condition is met, the high-low pressure difference during switching of the four-way valve can be reduced through the front pressure difference control and the rear pressure difference control, the impact force during switching of the four-way valve is small if the pressure difference is small, the four-way valve is more stable in the reversing process, and the stability of the four-way valve is improved. Impact on a unit is reduced, and damage is prevented.
Description
technical field [0001] The present invention relates to the technical field of air conditioner defrosting control, in particular to an air conditioner and its control method. Background technique [0002] During the heating operation of the air conditioner in winter, the fin heat exchanger of the outdoor unit will frost. After frosting, the heat exchange capacity of the unit decreases, and the heating capacity and heating efficiency of the unit will decrease. Therefore, defrosting is required when frosting reaches a certain level. The defrosting is through the conversion of the four-way valve, the heating mode of the unit is converted into the cooling mode, and the finned heat exchanger of the outdoor unit is heated and defrosted. After defrosting and frosting, it is necessary to switch the four-way valve to switch the cooling mode back to the heating mode and resume the heating operation. [0003] In the existing air conditioner defrosting control technology, the four-way...
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IPC IPC(8): F24F11/42F24F11/64F24F11/67F24F11/72F24F11/88F24F11/89F24F140/10
CPCF24F11/42F24F11/64F24F11/67F24F11/72F24F11/88F24F11/89F24F2140/10
Inventor 禹志强丛辉刘敬坤吕振鹏
Owner QINGDAO HISENSE HITACHI AIR CONDITIONING SYST