Electronic expansion valve detection method and system
A technology of an electronic expansion valve and a detection method, which is applied in the directions of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of inability to detect the closing action of the electronic expansion valve and the inability to realize the effectiveness of the electronic expansion valve.
Inactive Publication Date: 2017-01-18
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0005] Based on this, it is necessary to provide an electronic expansion valve detection method and system for the problem that the existing electronic expansion valve detection cannot detect the closing action of the electronic expansion valve, and thus cannot realize the effectiveness of the electronic expansion valve detection.
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[0119] As another possible implementation manner, the detection tool further includes a second input module.
[0120] The second input module is used to input the experience value of the opening degree of the electronic expansion valve into the control chip of the electrical equipment.
[0121] The control chip of the electrical equipment controls the electronic expansion valve to close to the second opening value M2 according to the empirical value of the opening degree of the electronic expansion valve.
[0122] Wherein, the empirical value of the opening degree of the electronic expansion valve is greater than or equal to 70% of the first opening degree value M1 and less than or equal to 90% of the first opening degree value M1.
[0123] That is, by adopting the empirical value method, after the electrical equipment is switched to the cooling mode (ie step S005), the detection tool is connected to the electrical equipment through communication, and the recording module in t...
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The invention discloses a method and system for detecting an electronic expansion valve. The method comprises the steps of detecting a first pressure value of a corresponding electrical device when the opening of the electronic expansion valve is a first opening value after the electrical device where the electronic expansion valve is installed is switched to a refrigeration mode; controlling the electronic expansion valve to close to a second opening value and detecting a second pressure value of the corresponding electrical device when the opening of the electronic expansion valve is the second opening value; and judging whether the electronic expansion valve is normal according to the first pressure value and the second pressure value. According to the method, whether the electronic expansion valve is normal is judged according to the first pressure value of the corresponding electrical device when the electronic expansion valve is in an opened state and the second pressure value of the corresponding electrical device when the electronic expansion valve is in a closed state. Simultaneous detection of opening motions and closing motions of the electronic expansion valve is achieved. The problems that the closing motions of the electronic expansion valve cannot be detected in the prior art and effectiveness of electronic expansion valve detection cannot be achieved are effectively solved.
Description
technical field [0001] The invention relates to the field of electric appliance detection, in particular to a detection method and system for an electronic expansion valve. Background technique [0002] As a throttling structure of air conditioners, electronic expansion valves have been widely used in various household inverter air conditioners. The stability of air conditioner operation is determined to a certain extent by the stability of its components. As a component part of the air conditioner, the electronic expansion valve has a large failure rate in after-sales use, which greatly affects the stable operation of the air conditioner. [0003] For the above-mentioned problem that the electronic expansion valve affects the stable operation of the air conditioner, it is usually necessary to test the electronic expansion valve to ensure that the electronic expansion valve installed in the air conditioner has good performance, so as to ensure the stable operation of the ai...
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IPC IPC(8): G01R31/00G01M13/00
Inventor 杨硕翡徐强杨清李博杜涛
Owner GREE ELECTRIC APPLIANCES INC