Fuel gas amount control method, fuel gas wall-hanging stove, fuel gas water heater and heating and ventilation system
A control method and technology for gas volume, which are applied in the fields of gas volume control, gas water heaters and HVAC systems, can solve problems such as the rated load of water heaters and wall-hung boilers changing easily, and the air-fuel ratio cannot be well adjusted, so as to eliminate flame out, The effect of reducing or extinguishing the flame and increasing the resistance
Pending Publication Date: 2021-01-12
SHENZHEN ALLIED CONTROL SYSTEM CO LTD
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Problems solved by technology
Therefore, the air-fuel ratio cannot be adjusted well, and the rated load of the water heater and wall-hung boiler is easy to change
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[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0058] refer to figure 1 , is a schematic diagram of the gas path of the gas device. The gas device can adjust and control the gas volume of the gas device through the gas volume control method provided by the embodiment of the present invention, so that the gas device can dynamically adjust the gas volume according to the change of the wind pressure value, improve the resistance capacity of the gas device, and When the pipeline impedance or ext...
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The invention relates to a fuel gas amount control method, a fuel gas wall-hanging stove, a fuel gas water heater and a heating and ventilation system. A fuel gas device comprises a cavity and a fan.The control method comprises the steps of obtaining current required fuel gas amount, and obtaining current standard current of a proportional valve under the standard working condition according to the current required fuel gas amount; obtaining a current air pressure value of the fan; obtaining current current compensation value of the proportional valve according to the current air pressure value and the current required fuel gas amount; obtaining current target current of the proportional valve according to the current standard current and the current current compensation value; and adjusting the current opening degree of the proportional valve according to the current target current so as to control the fuel gas amount of the fuel gas device. According to the invention, the fuel gas amount can be dynamically adjusted according to the change of the air pressure value, the resistance of the fuel gas device is improved, and when the pipeline impedance or external resistance of an exhaust pipe changes, the risks of flameout, excessive smoke and rated load change are effectively reduced or eliminated in cooperation with air amount compensation.
Description
technical field [0001] The invention relates to the field of gas control, and more specifically, to a gas volume control method, a gas wall-hung boiler, a gas water heater and a heating and ventilation system. Background technique [0002] Existing gas wall-hung boilers, gas water heaters, etc., do not dynamically adjust the gas volume according to the actual working conditions of the product during the gas volume adjustment process, which leads to the phenomenon of air-fuel ratio imbalance under complex working conditions. [0003] Specifically, such as figure 1 As shown, the pressure difference before and after the nozzle is Δp g =(p 3 +Δp 2 )-p 1 , where Δp 2 It is the secondary pressure output by the proportional valve. Under the condition that the nozzle diameter, hole length, number of nozzles and other structural dimensions are fixed, the gas volume is only determined by the pressure difference Δp before and after the nozzle g , the relationship can generally b...
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IPC IPC(8): F23N1/00F24H9/20
CPCF23N1/005F24H9/2035
Inventor 不公告发明人
Owner SHENZHEN ALLIED CONTROL SYSTEM CO LTD