Combustion gas nozzle for blue flare combustion gas water heater and injection device using the same

Abstract

The invention provides a gas nozzle of a blue flame gas water heater, wherein, the gas nozzle is arranged on a multiway distributor, and is just opposite to an injector hole of a fire grate burner, and comprises a central jet orifice and an air inlet. The invention is characterized in that: the diameter d of the jet orifice is smaller than the diameter D of the air inlet; the jet orifice and the air inlet are connected with a taper hole, and the size of the cone angle alpha of the taper hole is any angle between 15 degrees and 30 degrees. The invention has the advantages that: the gas nozzle provided by the invention and an injector device for using the nozzle can guarantee the primary air coefficient within a range of 0.5 to 0.7; the burning flame is clear, transparent and obvious blue, and the content of CO in the fume is below 300ppm.

Description

technical field [0001] The invention relates to an injection device for a gas water heater, in particular to an injection device for a blue-flame gas water heater capable of fully burning gas. Background technique [0002] Gas water heater is a kind of water heater widely used in households at present. It has the advantages of small size, fast heating speed and instant heating. The development trend of technology. For gas water heaters, it is a long-term continuous improvement goal to improve combustion thermal efficiency and reduce exhaust emissions. [0003] The structure of the existing closed gas water heater is as follows: figure 1 As shown, it mainly includes: water inlet valve 1, water inlet flow sensor 2, gas valve 3, pulse igniter (not shown in the figure), gas channel 4, multi-row fire row burner 5, heat exchanger 6, fan 7 and components such as smoke collecting hood 8 constitute. The water from the tap water pipe enters the water pipe of the heat exchanger 6 t...

AI Technical Summary

Problems solved by technology

[0005] 200420094241.9 utility model patent, in order to reduce the primary air coefficient, a nozzle with swirl holes is proposed. Its structure is as follows figure 2 As shown, a vortex hole 13 is provided at the end 12 of the nozzle 11, and the other end of the vortex hole 13 communicates with the injection port 15. A conical surface 14 is provided with a taper of 60 degrees, 90 degrees or 120 degrees. The patent uses the vortex hole to reduce the primary air coefficient, which is essentially to reduce the flow rate of the injected gas, so that the negative pressure generated by the flowing gas is reduced to achieve the purpose of reducing the primary air coefficient. The 90-degree or 120-degree conical surface 14 will cause a large energy loss of the gas flow.

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