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Method for detecting complete blockage of air conditioning system

An air-conditioning system and detection method technology, which is applied in heating and ventilation control systems, heating and ventilation safety systems, heating methods, etc., can solve fault information that cannot be reported in time, evaporators are completely blocked, and air conditioners have no air conditioning effect, etc. problems, to achieve the effect of improving the degree of intelligence and software control capabilities, avoiding reliability problems, facilitating fault judgment and the efficiency of after-sales maintenance services

Active Publication Date: 2013-06-05
四川长虹空调有限公司
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Problems solved by technology

[0002] At present, general air conditioners, especially inverter air conditioners, due to the failure of components, failure to operate, or poor processing, welding, and air conditioner installation errors, etc., there will be small shut-off valves not opened, large shut-off valves not opened, electronic The expansion valve is fully closed, the evaporator is completely blocked, the condenser is completely blocked, the pipeline is completely blocked, etc., and these problems will eventually lead to the system being completely blocked
At the same time, the abnormal operation of the air conditioner due to the complete blockage of the system cannot be detected in time, and the fault information cannot be reported in time, which will cause the refrigerant in the air conditioning system to flow and circulate, so that the air conditioner will not only have no air conditioning effect, but also cause serious damage to the air conditioner after long-term operation. reliability failure

Method used

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  • Method for detecting complete blockage of air conditioning system

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Embodiment Construction

[0016] Such as figure 1 The detection method of air-conditioning system of the present invention shown as complete blockage, comprises:

[0017] a. After the air conditioner is turned on, it is judged by the MCU whether it is in cooling mode or heating mode. If it is in other modes such as air supply, dehumidification, etc., the air conditioner is running normally and no subsequent judgment is made;

[0018] b. If it is in cooling mode and the running time of cooling is ≥ 5 minutes, judge whether the air conditioner meets the following conditions: 1. Indoor ambient temperature - indoor heat exchanger coil temperature ≤ 5°C; 2. -2°C ≤ outdoor heat exchanger coil Temperature - outdoor ambient temperature ≤ 3°C; 3. Real-time current ≤ rated current corresponding to the real-time frequency of the compressor; when all the above conditions are met, it is determined that the air conditioning system is completely blocked, stop and perform fault information display and sound prompts;...

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Abstract

The invention relates to a method for detecting complete blockage of an air conditioning system. The method includes a, enabling an MCU (microprogrammed control unit) to judge whether an air conditioner is in a refrigerating mode or a heating mode; b, judging whether the air conditioning system is completely blocked or not according to the difference between the temperature of an indoor environment and the temperature of a coil of an indoor heat exchanger, the difference between the temperature of a coil of an outdoor heat exchanger and the temperature of an outdoor environment and a relation between the magnitude of real-time current and the magnitude of rated current corresponding to real-time frequency when the air conditioner is in the refrigerating mode and the operating time is longer than or equal to set time; and c, judging whether the air conditioning system is completely blocked or not according to the difference between the temperature of the coil of the indoor heat exchanger and the temperature of the indoor environment, the difference between the temperature of the outdoor environment and the temperature of the coil of the outdoor heat exchanger and a relation between the magnitude of real-time current and the magnitude of rated current corresponding to real-time frequency when the air conditioner is in the heating mode and the operating time is longer than or equal to set time. The method has the advantages that the problem of complete blockage of the air conditioning system can be timely and accurately judged, the intelligent degree of the air conditioner is effectively improved, and the problem of poor reliability caused when an existing air conditioner works in a faulty mode is prevented.

Description

technical field [0001] The invention relates to a detection method for complete blockage of an air-conditioning system, and is particularly suitable for but not limited to a detection method for complete blockage of an inverter air-conditioning system. Background technique [0002] At present, general air conditioners, especially inverter air conditioners, due to the failure of components, failure to operate, or poor processing, welding, and air conditioner installation errors, etc., there will be small shut-off valves not opened, large shut-off valves not opened, electronic The expansion valve is fully closed, the evaporator is completely blocked, the condenser is completely blocked, the pipeline is completely blocked, etc., and these problems will eventually lead to the system being completely blocked. At the same time, the abnormal operation of the air conditioner due to the complete blockage of the system cannot be detected in time, and the fault information cannot be re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00
Inventor 阳洪邱名友杨涛
Owner 四川长虹空调有限公司
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