Combustor, wall-hanging stove and water heater

Abstract

The invention provides a combustor. The combustor comprises a bottom plate, a plurality of fire grates and backflow plates. The multiple fire grates are erected on the bottom plate side by side. The backflow plates are erected on the bottom plate, the backflow plates are arranged between every two adjacent fire grates, backflow holes are formed in the backflow plates, or backflow gaps are reservedbetween the backflow plates and the bottom plate so as to communicate with the two sides of the backflow plates. A plurality of secondary air holes are formed in the bottom plate, located below the fire grates, and communicate with gas mixing channels formed between the backflow plates and the fire grates. The invention further provides a wall-hanging stove comprising the combustor and a water heater comprising the combustor. By reasonably organizing air flow and performing flue gas backflow, secondary combustion forms oxygen-poor combustion, so that the fire grate combustion temperature is reduced, the NOx content after gas combustion is effectively reduced, and the application range of the wall-hanging stove and the water heater adopting an atmospheric combustor is expanded. In addition, high-temperature flue gas backflow can effectively preheat air and fuel, and therefore the combustion efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of household appliances, in particular to a burner, a wall-hung boiler and a water heater. Background technique [0002] Existing burners include atmospheric burners, rich-lean burners, water-cooled coil burners and fully premixed burners, among which NO x The content is in accordance with the standard requirements and test methods of GB25034-2010 "Gas Heating Water Heater", NO x The emission level can meet the requirements of level 5 standard, but the process is complicated and the cost is high. And atmospheric burner gas combustion NO x The content is too high, it can only meet the requirements of level 3 standards, and does not meet the NO requirements of some countries and regions x The requirements of emission standards have limited the scope of applicability of wall-hung boilers and water heaters equipped with atmospheric burners. In addition, the NO produced by combustion x Mainly thermal NO x a...

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to propose a burner, a wall-hung boiler and a water heater, aiming to solve the NO x The content is too high, which leads to the problem that the scope of applicability of wall-hung boilers and water heaters with atmospheric burners is limited

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