Control method of fully premixed gas water heater and gas water heater
A technology of gas water heaters and control methods, which is applied in the direction of combustion control, combustion methods, fluid heaters, etc., can solve the problems of easy tempering, reduce the full premixed combustion load, etc., and achieve the effect of not easy tempering
Active Publication Date: 2020-12-29
VATTI CORP LTD
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Problems solved by technology
[0003] In view of this, the main purpose of the present invention is to provide a control method for a fully premixed gas water heater, which solves the problem of tempering and reduces the overall pressure when the gas water heater pipe network pressure fluctuates and the external wind pressure fluctuates in the prior art. The problem with premixed combustion loads
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[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0030] Embodiment 1 of the present invention provides a control method for a fully premixed gas water heater, the method comprising:
[0031] Turn on the gas water heater, and collect the current gas flow, fan flow, and excess oxygen content after combustion of air and gas;
[0032] If the current gas flow, fan flow, and excess oxygen content after combustion of air and gas are consistent with the corresponding preset standard values, then the gas water heater does not perform load control;
[0033] If the current gas flow rate is inconsistent with the preset standard value, and the fan flow rate ...
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The invention discloses a control method of a fully premixed gas water heater. The control method comprises the steps that the gas water heater is started, and the current air flow and an output heatload numerical value are acquired; if the current fuel gas flow is inconsistent with a preset standard value and the fan flow and the excess oxygen content after air and fuel gas combustion are correspondingly consistent with the corresponding preset standard values, the current fuel gas flow input by the fuel gas water heater is adjusted, so that the current fuel gas flow is consistent with the preset standard value; and if the current fan flow is inconsistent with the preset standard value and the gas flow and the excess oxygen content after air and gas combustion are correspondingly consistent with the corresponding preset standard values, the current fan flow input by the gas water heater is adjusted, so that the current fan flow is consistent with the preset standard value. By adjusting the current gas flow, the air flow and the fan flow, the phenomena that when gas flow of the gas water heater fluctuates, the tempering phenomenon is not prone to happening, and the fully-premixedcombustion load cannot be reduced are effectively avoided.
Description
technical field [0001] The invention belongs to the technical field of gas water heater control, and in particular relates to a control method of a fully premixed gas water heater and a gas water heater. Background technique [0002] Among the existing gas-fired water heaters, according to the combustion method of gas, especially the mixing ratio of air and gas, they can be divided into full premix combustion models and partial premix combustion models. Among them, full premixing has the following characteristics: air and gas are fully mixed according to the chemical equivalent ratio before combustion, and then ignited and burned, which has many advantages, such as full combustion of gas, high volumetric heat intensity, high thermal efficiency, and harmful emission indicators Low, etc.; however, when the pipe network pressure fluctuates and the external wind pressure fluctuates, full premix combustion is prone to flashback, and it is also possible to reduce the load of full ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F24H9/20F23N1/02
CPCF24H9/2035F23N1/025Y02B30/00
Inventor 覃进武麦伟添潘叶江
Owner VATTI CORP LTD