Defrosting control method of air-conditioner

A control method and technology for air conditioners, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as increasing product design and manufacturing complexity

Active Publication Date: 2009-10-07
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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Problems solved by technology

Therefore, for air-conditioning products, the routing of the external ambient temperature sensor, electrical safety issues, and detection accuracy issues must be co

Method used

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  • Defrosting control method of air-conditioner
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  • Defrosting control method of air-conditioner

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Embodiment Construction

[0021] The invention discloses a defrosting control method for an air conditioner. The air conditioner includes: an outdoor heat exchanger, an indoor heat exchanger, a compressor, a control device, a tube temperature sensor of the outdoor heat exchanger, the outdoor heat exchanger, the indoor The heat exchanger and the compressor are connected by pipes to form a refrigerant circulation channel, and the refrigerant flows in the circulation channel; the tube temperature sensor of the outdoor heat exchanger is electrically connected to the control device; wherein, the defrosting The control method is that after the air conditioner is turned on for heating operation, the control device records the initial value of the outdoor heat exchanger temperature, and then the control device dynamically records and judges the outdoor heat exchanger temperature signal sent by the outdoor heat exchanger tube temperature sensor , get the highest value Tmax of the temperature of the outdoor heat ...

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Abstract

The invention discloses a novel judging method of defrosting conditions of an air-conditioner, which cancels an environment temperature sensor and judges if an outdoor heat exchanger needs to be defrosted according to the temperature variation situation of an outdoor evaporator in the heating process, thereby simplifying the design and a manufacturing method of products, reducing the development cost and enhancing the heating efficiency of the air-conditioner. The defrosting control method is as follows: after the air-conditioner is started to carry out heating operation, a control device records an initial value of the temperature of the outdoor heat exchanger and then dynamically records and judges a temperature signal of the outdoor heat exchanger, which is sent by a pipe temperature sensor of the outdoor heat exchanger, so as to obtain a maximum value Tmax of the temperature of the outdoor heat exchanger and store the maximum value Tmax; after the cumulative time of the heating operation of the air-conditioner reaches a preset time quantum of the control device, the control device compares the current temperature T of the outdoor heat exchanger with the maximum value Tmax of the temperature of the outdoor heat exchanger, and when the Tmax-T is larger than or equal to M which is the set temperature, the air-conditioner is in a defrosting mode.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to a defrosting control method of an air conditioner. Background technique [0002] Existing air-conditioning products need to perform defrosting operation during heating in winter, and the defrosting operation control method usually requires the use of an external ambient temperature sensor to assist in completion. For example: [0003] Notification number is the Chinese patent of CN1548864, title is: " defrost control method of air conditioner ", discloses a kind of defrost control method of air conditioner. It includes the stage of making the refrigerant enter the outdoor heat exchanger after the compressor is driven; the stage of measuring the outdoor air temperature and the temperature of the outdoor exhaust pipe after a certain period of time; and defrosting when the temperature difference between the outdoor air and the outdoor exhaust pipe exceeds a ce...

Claims

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Application Information

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IPC IPC(8): F25B47/02F25B49/02
Inventor 张辉钟明生陈绍林李文灿刘访王现林
Owner GREE ELECTRIC APPLIANCES INC
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