Fault detection method of multi-line system and its main flow valve body assembly

Abstract

The invention discloses a multi-split air conditioner system and a failure detection method for the main flow path valve component of the multi-split air conditioner system. The multi-split air conditioner system comprises an outdoor unit, a flow division device and multiple indoor units, wherein the flow division device comprises a first heat exchanger, a second heat exchanger and a main flow path valve component; and the main flow path valve component is arranged between the outlet of the first heat exchange flow path of the first heat exchanger and the inlet of the first heat exchange flow path of the second heat exchanger. The method comprises the steps that when the multi-split air conditioner system operates at a pure heating mode, the upstream supercooling degree of the main flow path valve component is acquired, and heating indoor unit capability failure signals are acquired; and whether the main flow path valve component fails or not is determined according to the upstream supercooling degree of the main flow path valve component and the heating indoor unit capability failure signals. By adopting the method, during the operation process of the multi-split air conditioner system, whether the main flow path valve component fails or not is rapidly and effectively determined, and safe and reliable operation of the system is ensured.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a fault detection method for a multi-connected system and a valve body component of a main flow path thereof. Background technique [0002] The multi-connected system can perform cooling and heating at the same time, but due to the complexity of the system and the large number of valve bodies, it is necessary not only to have a complete control logic to control the action of the valve body, but also to ensure that the valve body can work normally, so as to ensure the long-term reliable operation of the system. [0003] Usually, in a multi-connected system, the connecting pipes of the indoor unit and the distribution device need to be welded and installed. Due to the large number of indoor units, there are also many corresponding solder joints. When the system is running, welding slag may block the valve body of the distribution device. In this case, the valve body is abn...

AI Technical Summary

Problems solved by technology

[0003] Usually, in a multi-connected system, the connecting pipes of the indoor unit and the distribution device need to be welded and installed. Due to the large number of indoor units, there are also many corresponding solder joints. When the system is running, welding slag may block the valve body of the distribution device. In this case, the valve body is abnormal, and it is also possible that the valve body fails due to aging and failure of the valve body and cannot work reliably.

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