Method for detecting blockage of air conditioning system

An air-conditioning system and detection method technology, applied in heating and ventilation control systems, heating and ventilation safety systems, heating methods, etc., can solve the problems of inability to identify system blockage, complex control methods, sensor failures, etc., to facilitate fault diagnosis and The effect of after-sales maintenance service efficiency, improving intelligence, and avoiding reliability problems

Active Publication Date: 2021-03-26
四川长虹空调有限公司
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Problems solved by technology

[0005] The above existing technical solutions mainly rely on the tube temperature or heat exchanger coil temperature for related detection and identification. Identify system blockages

Method used

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  • Method for detecting blockage of air conditioning system

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Embodiment Construction

[0013] The invention proposes a detection method for air conditioning system blockage, which does not rely on the temperature of the evaporator or condenser coil, calculates the winding temperature of the compressor in real time and obtains the frequency of the current compressor, and at the same time, according to the change of the opening degree of the expansion valve and the ambient temperature In this case, by calculating the change rate of the compressor winding temperature, it is judged whether the change rate is within the preset threshold range. If it is, the system is blocked and a fault is reported. If not, the system is normal, so that the air conditioning system blockage can be effectively controlled. timely judgment.

[0014] Concrete implementation of the present invention is as follows:

[0015] First, collect and store the ambient temperature Tori outside the outdoor unit, the opening degree Vi of the electronic expansion valve, the frequency Fi of the compress...

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Abstract

The invention relates to the field of air conditioners, and discloses a method for detecting blockage of an air conditioning system, so that blockage detection of the air conditioning system does notdepend on the temperature of an evaporator or condenser coil. The method comprises the following steps of collecting and storing the environment temperature of the outer side of an outdoor unit, the opening degree of an electronic expansion valve, the frequency of a compressor and the temperature of a compressor winding in real time, and meanwhile, calculating a change rate deltaT1 of the environment temperature of the outer side of the outdoor unit within n seconds, a change rate deltaV of the opening degree of the electronic expansion valve within n seconds, a change rate deltaF of the frequency of the compressor within n seconds and a change rate deltaT2 of the temperature of the compressor winding within n seconds; and when deltaT1 is smaller than a first temperature change rate threshold Th1, deltaV is equal to 0 and deltaF is equal to 0, comparing the relation between deltaT2 and the second temperature change rate threshold Th2, and judging whether the air conditioning system isblocked or not according to a comparison result. The method is suitable for detecting the blockage of the air conditioner.

Description

technical field [0001] The invention relates to the field of air conditioning, in particular to a detection method for blockage of an air conditioning system. Background technique [0002] During the manufacturing and assembly process of the air conditioner, due to the poor environment, a small amount of impurities or dust will inevitably appear in the pipeline system, or when the parts of the pipeline are welded, oxide scales are easily produced, and the cleanliness of the pipeline is difficult to guarantee. All of these Fine impurities can easily block the throttle device in the air conditioner. In addition, due to device failure, poor welding or operational errors during installation, problems such as electronic expansion valves not being opened, heat exchangers fully blocked, and large and small shut-off valves not being opened may occur. These problems will cause the system to be blocked. The refrigerant in the air conditioner cannot flow and circulate, so that the air...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/38F24F11/52
CPCF24F11/38F24F11/52Y02B30/70
Inventor 王晰江坤
Owner 四川长虹空调有限公司
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