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Defrosting control method for air conditioner

A control method and technology for air conditioners, applied in heating and ventilation control systems, heating methods, mechanical equipment, etc., can solve problems such as frost-free defrosting and frost-free false defrosting, etc., to ensure stability and improve customer experience.

Pending Publication Date: 2022-04-01
MITSUBISHI HEAVY IND HAIER QINGDAO AIR CONDITIONERS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a defrosting control method for an air conditioner, which solves the problems of non-defrosting and no-frost defrosting in existing defrosting methods for air conditioners

Method used

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  • Defrosting control method for air conditioner
  • Defrosting control method for air conditioner
  • Defrosting control method for air conditioner

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Embodiment

[0019] First of all, it needs to be explained that when frost forms on the surface of the heat exchanger of the outdoor unit, the heat exchange condition of the heat exchanger will become poor, the resistance of the return air will increase, and the current of the DC motor will also increase accordingly. Therefore, the change of the DC motor current can be used as one of the conditions for judging whether the surface of the heat exchanger is frosted.

[0020] Secondly, the air conditioner hardware involved in the defrosting control method of the air conditioner in this embodiment is as follows: figure 1 As shown, including air conditioner outdoor unit controller, DC motor, DC motor controller, air conditioner indoor unit, outdoor heat exchanger, compressor, throttle valve, air conditioner external unit controller is the main controller, responsible for sending outdoor unit operation commands and receive feedback signals. The DC motor used in this embodiment can be reversed, a...

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Abstract

The invention particularly relates to a defrosting control method for an air conditioner, which combines the temperature and time conditions of an outdoor heat exchanger of an air conditioner system with the driving current of a direct current motor to carry out accurate defrosting control, and can further remove defrosting water, foreign matters and the like on the surface of the outdoor heat exchanger through the reverse rotation of the motor. And the best defrosting effect is achieved. The temperature sensor of the heat exchanger and the driver of the direct-current motor continuously feed back data to the controller of the air conditioner, the direct-current motor can rotate reversely, and the direct-current motor can feed back data such as driving current and rotating speed to the controller of the outdoor unit of the air conditioner at the same time by modifying an existing FG signal port. According to the control method, whether the heat exchanger is blocked or not is judged, the temperature and time conditions of the heat exchanger and the driving current of the direct current motor are jointly judged, mistaken defrosting is reduced to the maximum degree, and accurate defrosting is achieved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner defrosting control method. Background technique [0002] Air conditioners have become one of the essential equipment in people's lives, but in cold environments, affected by the surface temperature of the heat exchanger of the outdoor unit, once the surface temperature of the heat exchanger is lower than the dew point and freezing point of the air, heat exchange Frost will form on the surface of the air conditioner, which will greatly reduce the operating capacity of the air conditioner, and even cause serious accidents such as compressor burnout. [0003] Now the traditional defrosting control methods usually have the following types, 1. Air pressure difference defrosting control method: due to the frosting of the heat exchanger, the pressure difference on both sides of the heat exchanger increases, so as to control whether to defrost. 2. Temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/42F24F11/64F24F11/65F24F11/38
Inventor 王硕范增年相金波
Owner MITSUBISHI HEAVY IND HAIER QINGDAO AIR CONDITIONERS CO LTD
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