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How to detect blockage in 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: 2022-07-08
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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  • How to detect blockage in air conditioning system

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Embodiment Construction

[0013] The present invention proposes a method for detecting blockage of an air-conditioning system, which does not rely on the temperature of the evaporator or the condenser coil, calculates the compressor winding temperature in real time and obtains the current frequency of the compressor, and at the same time, according to the change of the opening degree of the expansion valve and the ambient temperature If the change rate of the compressor winding temperature is calculated, 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 it is not, the system is normal. timely judgment.

[0014] The specific implementation mode of the present invention is as follows:

[0015] First, collect and store the ambient temperature outside the outdoor unit Tori, the electronic expansion valve opening Vi, the compressor frequency Fi, and the compressor winding temperature in real time, and calculate the change r...

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Abstract

The invention relates to the field of air conditioning, and discloses a method for detecting clogging of an air conditioning system, so that the temperature of an evaporator or a condenser coil is not dependent on the clogging detection of the air conditioning system. The invention collects and stores the ambient temperature outside the outdoor unit, the opening degree of the electronic expansion valve, the compressor frequency and the compressor winding temperature in real time, and simultaneously calculates the change rate ΔT1 of the ambient temperature outside the outdoor unit within n seconds, the opening degree of the electronic expansion valve The rate of change ΔV within n seconds, the rate of change of compressor frequency ΔF within n seconds, and the rate of change of compressor winding temperature within n seconds ΔT2; when ΔT1 is less than the first temperature change rate threshold Th1, and ΔV=0, When ΔF=0, the relationship between ΔT2 and the second temperature change rate threshold Th2 is compared, and whether the air-conditioning system is blocked is determined according to the aforementioned comparison result. The present invention is suitable for air conditioner blockage detection.

Description

technical field [0001] The invention relates to the field of air conditioning, and in particular to a method for detecting 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 various parts of the pipeline are welded, it is easy to produce oxide scale, and the cleanliness of the pipeline is difficult to guarantee. All these Fine impurities can easily clog the throttling device in the air conditioner. In addition, due to device failure, poor welding or operation errors during installation, there will be problems such as the failure of the electronic expansion valve to be opened, the total blockage of the heat exchanger, and the failure of the large and small stop valves to open. These problems will lead to blockage of the system, and the inability of the refrigerant ...

Claims

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Application Information

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Patent Type & Authority Patents(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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