Condensation type fuel gas heating stove

Abstract

The invention discloses a condensation type fuel gas heating stove. The condensation type fuel gas heating stove comprises a main heat exchanger, a gas valve, a combustor, a combustion cavity, a smokecollecting hood, a flue, a shell and a circulating water pump and further comprises a direct-current draught fan and a waste heat recycling device; the direct-current draught fan is a noninductive brushless direct-current draught fan and comprises a draught fan electric control plate and a draught fan body, the draught fan body is separated from the draught fan electric control plate, and is mounted between the main heat exchanger and the waste heat recycling device, the draught fan electric control plate adjusts the rotating speed of the draught fan body in real time along with changes of combustion power of the heating stove, and controls the air-fuel ratio in the combustion process to be kept unchangeable, the noninductive brushless direct-current draught fan is adopted in the heatingstove, no induction elements exist in the draught fan body, the draught fan body and the draught fan electric control plate are separated, and the draught fan body can be applied to the severe environment; meanwhile, the wind speed of the direct-current draught fan is precisely adjustable, the air-fuel ratio in the combustion cavity is kept as definite value under different types of combustion power, meanwhile, the heating stove is combined with the waste heat recycling device to promote the condensation effect, work efficiency is improved, and energy is saved.

Description

technical field [0001] The invention relates to the technical field of fluid heaters, in particular to a gas heating furnace, in particular to a condensing gas heating furnace which can improve the condensation effect. Background technique [0002] Some premixed "IP type" gas heating water heaters currently on the market basically use AC fans as the delivery unit for the air volume used for combustion. At the same time, the AC fan is also combined with the waste heat recovery module to promote the condensation effect of the waste heat recovery module. However, when the AC fan is used as a heating furnace fan, its speed is fixed or the adjustment range is narrow. When the heating furnace burns at different power levels, the air volume delivered by it will lead to inconsistent thermal efficiency of the heating furnace when burning at different power levels, which cannot be guaranteed. The air-fuel ratio is always kept at the optimal ratio state, and as the power decreases, the...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide an atmosphere-balanced condensing gas-fired heating furnace that combines a non-inductive brushless DC fan and a waste heat recovery device to form a core energy-saving component. The DC fan has an adjustable wind speed and is Closed-loop feedback can realize the high efficiency of the heating furnace at different power levels, and keep the air-fuel ratio at a constant value, thus completely solving the problem that the efficiency of the heating furnace decreases with the power reduction caused by the fixed wind speed of the AC fan or the narrow adjustment range. Energy waste; on the other hand, by controlling the air volume of the DC fan to increase the condensation effect of the waste heat recovery device on water vapor below the rated power, so that the condensation effect is better and energy is saved; in addition, the fan The electric control board is separated from the fan body and there is no induction element in the fan body. The fan body can adapt to harsh environments, so that the heating furnace can be widely used in various environments

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