A control method for an air conditioning system

An air-conditioning system and control method technology, which is applied in the direction of mechanical equipment, etc., can solve problems such as unit abnormalities and heat storage module unit units that cannot defrost normally, so as to prevent abnormalities, maintain reliable and stable operation of the system, and ensure continuous defrosting Effect

Active Publication Date: 2020-12-15
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that failure of the thermal storage module during the defrosting period of the air conditioner will cause the unit to fail to defrost normally, and further cause the unit to be abnormal, thereby providing a control method for the air conditioning system

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  • A control method for an air conditioning system

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Embodiment Construction

[0035] Such as figure 1 As shown, the present invention provides a control method of an air conditioning system, which includes:

[0036] The air conditioning system includes compressor 1, external heat exchanger 2, external fan, four-way valve one 61, four-way valve two 62, large valve 55, small valve 56, valve three 92, heat storage module 4, and indoor unit 3 , the pipeline between the heat storage module 4 and the external heat exchanger 2 is also provided with a fourth throttling device 54;

[0037] The control method includes a detection step, which is used to detect whether the operation mode of the air conditioning system is heating mode or defrosting mode, and the temperature T of the refrigerant inlet pipe of the heat storage module is 入 and refrigerant outlet temperature T 出 , and the defrosting time t of the air conditioning system 化 ;

[0038] It also includes a judging step, judging T in the heating mode 入 and T 出 Whether all 1 , and judge the defrosting ti...

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Abstract

The invention provides a control method of an air conditioning system. The control method of the air conditioning system includes a detection step: detecting if a running mode of the air conditioningsystem is a heating mode or a defrosting mode, and detecting T<inlet> of an inlet pipe and T<outlet> of an outlet pipe of a heat accumulation module and defrosting time t<defrosting> of the air conditioning system, further includes a judging step: judging if the T<inlet> and the T<outlet> under the heating mode are both less than T1, and judging if the defrosting time t<defrosting> under the defrosting mode is larger than t2, wherein the T1 and the t2 are both constants; and further includes a control step: controlling a forth throttling deice to adjust the opening degree to the maximum step number according to a result obtained in the judging step, or controlling a control system to enter a common inner unit defrosting mode when judging out that fault exists in the heat accumulation module. The control method of the air conditioning system can effectively and accurately judge out if the heat accumulation module breaks down, prevents the situation that the air conditioning unit cannotnormally defrost due to the fact that heat accumulation module breaks down from occurring, guarantees continuous proceeding of defrosting, and maintains reliable and stable running of the system.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to a control method of an air conditioning system. Background technique [0002] The problem of frosting and defrosting of air source heat pumps is a key technical issue of air conditioning, which has a significant impact on heating performance and comfort. The total area of ​​hot summer and cold winter areas, cold areas and severe cold areas accounts for about 85% of the total area of ​​the country. These areas need heating in winter, and most of them will experience frost and defrost during heating in winter. [0003] Traditional heat pump air conditioners use a four-way valve reversing defrosting method during heating operation in winter. This method is simple to operate, but has the following disadvantages: 1. The indoor temperature fluctuates greatly and the thermal comfort is poor. 2. The temperature rises slowly. The frequency increase of the compresso...

Claims

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Application Information

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IPC IPC(8): F24F11/42
CPCF24F11/42
Inventor 倪毅薛寒冬傅英胜李龙飞王芳
Owner GREE ELECTRIC APPLIANCES INC
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