Gas water heater for segmented combustion and control method thereof

Abstract

The invention discloses a gas water heater for segmented combustion and a control method thereof. The gas water heater comprises a gas water heater main body, a combustor, a segmentation valve, a gaschannel, a gas proportional valve and a controller; the combustor, the segmentation valve, the gas channel and the controller are all arranged in the gas water heater main body; the gas proportional valve is arranged on the gas channel; the controller is electrically connected with the segmentation valve and the gas proportional valve, and is used for switching fire levels of the gas water heaterand adjusting current sections of the gas proportional valve in any fire level; the switching of the fire levels is realized through the switching control of the segmentation valve by the controller,and a current linkage control mode is adopted to limit different fire levels in different current sections of the gas proportional valve, so that the heat load overlap section between the low fire level and the high fire level is widened; the disconnecting pressure of the water heater can be effectively reduced; and constant-temperature hot water still can be output when the gas supply pressure isinsufficient, so that the bath feeling is improved.

Description

technical field [0001] The invention belongs to the technical field of gas water heater control systems, and in particular relates to a segmented combustion gas water heater and a control method thereof. Background technique [0002] The constant temperature gas water heater can output constant temperature hot water, greatly improving the comfort of bathing, and has become a mainstream product in the heating industry; a gas proportional valve is installed in the gas supply pipeline of the constant temperature gas water heater, and the gas proportional valve is electrically connected to the controller. It can automatically adjust the opening of gas flow according to the instructions of the control program, and control the size of the combustion firepower, so as to realize the constant temperature of hot water. [0003] At present, the constant temperature gas water heaters on the market generally adopt fire power segmented devices to reduce the minimum temperature rise and wi...

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Problems solved by technology

[0003] At present, the constant temperature gas water heaters on the market generally adopt fire power segmented devices to reduce the minimum temperature rise and widen the range of water temperature adjustment to meet the water temperature needs of users in different usage occasions, especially to solve the problem of high hot water temperature in summer; the water heater controller and strong suction electromagnetic The valve is electrically connected, and the control program command is output to open or close the valve to control the number of combustion fire rows, so as to realize the division of fire power. Insufficient gas supply pressure due to long or too small opening of the gas valve is prone to fire failure, and the outlet water temperature cannot be stabilized to the preset temperature, fluctuating from high to low, affecting the user's bathing experience

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