Four-way valve anomaly detection method and device and air conditioning unit

A technology of abnormality detection and four-way valve, applied in the field of four-way valve, can solve the problem that abnormality of four-way valve commutation cannot be detected and handled in time, and achieve the effect of improving operation reliability, reducing failure rate and maintenance rate
CN109556232AActive Publication Date: 2019-04-02GREE ELECTRIC APPLIANCES INC
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
GREE ELECTRIC APPLIANCES INC
Publication Date
2019-04-02

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Abstract

The invention discloses a four-way valve anomaly detection method and device and an air conditioning unit. The method comprises the following steps that whether the reversing of a four-way valve is abnormal or not is judged according to a preset judgment condition after the reversing of the four-way valve is monitored; when the reversing of the four-way valve is abnormal, the fault frequency of the four-way valve is accumulated, and the fault treatment of the four-way valve is carried out; and the reversing frequency of the four-way valve is accumulated, and the preset judgment condition is adjusted according to the fault frequency and the reversing frequency. According to the method and device and the air conditioning unit, the problem that in the prior art, the four-way valve cannot be detected and treated in time when reversing of the four-way valve is abnormal is solved, the operation reliability of a heat pump unit is improved, and meanwhile the fault rate and the maintenance rateof the unit are reduced.
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Description

technical field

[0001] The present invention relates to the technical field of four-way valves, in particular to a four-way valve abnormality detection method, device and air conditioning unit. Background technique

[0002] In recent years, due to weather factors, national policies and energy consumption factors, the heat pump market has developed rapidly. Most heat pump products use four-way valves to switch between cooling and heating. When heating at low temperatures, there is defrosting, and the switching of four-way valves is more frequent. The four-way valve is a pressure-difference-driven valve. It depends on the power-off / power-on of the coil to drive the pilot valve to change the pressure difference on both sides of the piston and push the piston to overcome the frictional resistance of the slide valve to complete the reversing work. When the system pressure difference is insufficient, it will cause no reversing. Or the situation where the commutation is not in pla...

Claims

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