Fault detection method of three-way valve in dual-purpose furnace

Abstract

The invention relates to a fault detection method of a three-way valve in a dual-purpose furnace. The fault detection method comprises the steps that the water flow state in a heat exchange pipeline connecting a heating circuit in a plate-type heat exchanger is detected; if the dual-purpose furnace works in the bath mode, and no water flows through the heat exchange pipeline connecting the heatingcircuit in the plate-type heat exchanger, the situation that the three-way valve is failed is judged; and if the dual-purpose furnace works in the heating state, and water always flows through the heat exchange pipeline connecting the heating circuit in the plate-type heat exchanger, the situation that the three-way valve is failed is judged. According to the fault detection method of the three-way valve in the dual-purpose furnace, the detection of the fault of the three-way valve is achieved, the technical blind spot that the three-way valve status cannot be detected is solved, thus an early warning is given to the dual-purpose furnace, the fault detection work of maintenance personnel is simplified, meanwhile a user is effectively reminded about the use attention under the fault stateof the three-way valve, and the possibility of causing harm to the user is effectively decreased.

Description

technical field [0001] The invention relates to a fault detection method for a three-way valve in a dual-purpose furnace. Background technique [0002] The dual-purpose furnace is a water heater powered by natural gas. It can not only provide domestic bathing water, but also meet the needs of family central heating. It is economical and practical to use. For example, the authorized announcement number is CN206959317U (application number is 201720924717.4) Chinese utility model patent "A Quantitative User Working System", in which the disclosed dual-purpose furnace includes combustion heat exchange device, gas pipeline, heating pipeline, domestic water pipeline, heat exchange The dual-purpose boiler system can provide hot water for domestic water and heating water at the same time. Among them, a three-way valve is set on the water outlet section of the heating pipeline, and the outlets of the three-way valve are respectively connected to the heating pipeline and the water ch...

AI Technical Summary

Problems solved by technology

However, if the three-way valve fails or a large amount of air accumulates in the pipeline, the three-way valve will not switch properly, which will affect the constant temperature of the water outlet.

However, the current dual-purpose furnace does not have the fault detection function of the three-way valve, which affects the user experience, and at the same time cannot provide effective fault information for the maintenance master faster.

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