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Four-way valve fault diagnosis method, heat pump system control method and air source heat pump system

A technology of heat pump system and diagnosis method, which is applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc. It can solve problems such as freezing damage of indoor heat exchangers, affecting user experience, abnormalities, etc., and achieves the effect of ensuring safety and reliability

Pending Publication Date: 2017-12-19
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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Problems solved by technology

[0002] In a heat pump system, typically an air source heat pump system, the water-side heat exchanger, that is, the indoor heat exchanger, is prone to freeze damage during heating operation, seriously affecting user experience
[0003] Aiming at the problem that the existing heat pump system is prone to frost damage when the indoor heat exchanger is running for heating, this application found that it was caused by the abnormal reversing due to the failure of the four-way valve. After the heating is started or after the defrosting mode is switched to the heating mode, the heat pump system is still running cooling or partial cooling, so that the temperature of the indoor heat exchanger such as the water side heat exchanger gradually decreases, and then the indoor heat exchanger appears Frozen phenomenon

Method used

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  • Four-way valve fault diagnosis method, heat pump system control method and air source heat pump system
  • Four-way valve fault diagnosis method, heat pump system control method and air source heat pump system
  • Four-way valve fault diagnosis method, heat pump system control method and air source heat pump system

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Embodiment Construction

[0032] The present invention is described below based on the embodiments, and those skilled in the art should understand that the drawings provided here are for the purpose of illustration, and the drawings are not necessarily drawn to scale.

[0033] Unless the context clearly requires otherwise, throughout the specification and claims, "comprises", "comprises" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive meaning; that is, "including but not limited to" meaning.

[0034] Aiming at the problems existing in the prior art, this application proposes a four-way valve fault diagnosis method. The following four-way valve in the air source heat pump system is taken as an example to specifically illustrate the four-way valve fault diagnosis method of this application. Of course, it is understandable Yes, this diagnostic method can also be used in other heat pump systems with similar problems. like figure 1 As shown, the air sou...

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Abstract

The invention provides a four-way valve fault diagnosis method, a heat pump system control method and an air source heat pump system. A four-way valve is arranged in the heat pump system which further comprises an indoor heat exchanger and an outdoor heat exchanger. The indoor heat exchanger comprises a first heat exchange flow channel and a second heat exchange flow channel, and a refrigerant circulating loop is formed by the first heat exchange flow channel, the four-way valve and the outdoor heat exchanger. A heat exchange medium flows in the second heat exchange flow channel and is used for exchanging heat with a refrigerant in the first heat exchange flow channel. The diagnosis method comprises the steps of detecting the temperature T2 of the heat exchange medium flowing out of the second heat exchange flow channel, and judging whether the four-way valve has faults or not at least according to the detected temperature T2. According to the four-way valve fault diagnosis method, by judging whether the four-way valve has faults or not by detecting the temperature of the heat exchange medium flowing out of the second heat exchange flow channel, whether the four-way valve has faults or not can be timely and effectively judged, and thus operation safety and reliability of the heat pump system are guaranteed.

Description

technical field [0001] The invention relates to the field of fault diagnosis of a heat pump system, in particular to a four-way valve fault diagnosis method, a heat pump system control method and an air source heat pump system. Background technique [0002] In a heat pump system, typically an air source heat pump system, the water-side heat exchanger, that is, the indoor heat exchanger, is prone to freeze damage during heating operation, seriously affecting user experience. [0003] Aiming at the problem that the existing heat pump system is prone to frost damage when the indoor heat exchanger is running for heating, this application found that it was caused by the abnormal reversing due to the failure of the four-way valve. After the heating is started or after the defrosting mode is switched to the heating mode, the heat pump system is still running cooling or partial cooling, so that the temperature of the indoor heat exchanger such as the water side heat exchanger gradua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02
CPCF25B49/02F25B2500/06
Inventor 袁占彪谷月明王晓红
Owner GREE ELECTRIC APPLIANCES INC
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