A Fault Detection Method for Three-way Valve in Dual-purpose Furnace

Abstract

The invention relates to a fault detection method for a three-way valve in a dual-purpose furnace, which detects the water flow state in the heat exchange pipeline connected to the heating circuit in the plate heat exchanger; if the dual-purpose furnace works in the bathing mode, and the plate heat exchanger When there is no water flow through the heat exchange pipeline connected to the heating circuit, it is judged that the three-way valve is faulty; if the dual-purpose furnace is working in the heating state and there is always water flow through the heat exchange pipeline connected to the heating circuit in the plate heat exchanger, Determine the failure of the three-way valve. The fault detection method of the three-way valve in the dual-purpose furnace in the present invention realizes the detection of the fault of the three-way valve, solves the technical blind spot that the state of the three-way valve cannot be detected, and then gives an early warning to the dual-purpose furnace, which simplifies the work of maintenance personnel. At the same time, it effectively reminds the user to pay attention to the use of the three-way valve in the fault state, effectively reducing the possibility of causing harm to the user.

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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