Casing type wall-mounted furnace internally provided with inner circulating device

Abstract

The invention discloses a casing type wall-mounted furnace, and aims to providing the casing type wall-mounted furnace which is internally provided with an inner circulating device and has the advantages of being simple in structure, good in usage effect and capable of prolonging the service life of a product. The wall-mounted furnace comprises a shell, a burner, a heat exchanger, a heating waterheat-exchange pipeline and a domestic hot water heat-exchange pipeline, the heating water heat-exchange pipeline is connected with a heating water inlet pipe and a heating water outlet pipe, the domestic hot water heat-exchange pipeline is connected with a domestic hot water intlet pipe and a domestic hot water outlet pipe, the burner is also provided with a gas pipeline, and the heating water inlet pipe is provided with a circulating water pump; the casing type wall-mounted furnace also comprises an inner circulating water return pipe, the water outlet end of the heating water outlet pipe isprovided with an electric three-way valve and communicated with a water inlet of the electric three-way valve, one end of the inner circulating water return pipe is connected with one water outlet ofthe electric three-way valve, and the other end of the inner circulating water return pipe is communicated with a water inlet of the circulating water pump. The casing type wall-mounted furnace is applied to the technical field of casing type wall-mounted furnaces.

Description

technical field [0001] The invention relates to a sleeve-type wall-hung boiler, in particular to a sleeve-type wall-hung furnace with a built-in internal circulation device. Background technique [0002] Gas wall-hung boilers use natural gas, artificial gas or liquefied gas as fuel. The fuel is output by the burner, and after burning in the combustion chamber, the heat is absorbed by the heat exchanger. When the circulating water in the heating system passes through the heat exchanger, it passes through the reciprocating Heating, thereby continuously outputting heat to the building, provides a heat source for the building. The general dual-purpose gas wall-hung boiler not only has the function of heating, but also has the function of supplying domestic hot water. For example, the casing type wall-hung boiler is one of them. When the casing-type wall-hung boiler is heating, hot water circulates in the heating circulation pipe. When domestic hot water is supplied, because the...

AI Technical Summary

Problems solved by technology

As far as the existing casing-type wall-hung boiler is concerned, when the heating is stopped, the hot water in the heating circulation pipe also stops flowing, which will cause local high temperature in the heating circulation pipe, resulting in layer temperature, large temperature difference, and easy scaling. In severe cases, solder joints will fall off

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