Constant-temperature control method of gas water heater and gas water heater
A gas water heater, constant temperature control technology, applied in fluid heaters, lighting and heating equipment, etc., to achieve the effect of ensuring accuracy, avoiding worse constant temperature, and avoiding constant temperature compensation
Active Publication Date: 2021-04-16
GUANGDONG VANWARD NEW ELECTRIC CO LTD
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Problems solved by technology
[0009] The invention provides a constant temperature control method of a gas water heater and a gas water heater to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions
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[0074] 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.
[0075] It should be noted that although the functional modules are divided in the system schematic diagram and the logical order is shown in the flow chart, in some cases, it can be executed in a different order than the module division in the system or the flow chart steps shown or described. The terms "first", "second" and the like in the specification and claims and the above drawings are used to distinguish similar objects, and not necessarily used to describe a specific sequence or sequence.
[0076] figure 1 It is a constant temperature control method of a gas water heater provided by an em...
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The invention discloses a constant-temperature control method of a gas water heater and the gas water heater. The constant-temperature control method comprises the following steps that the water inlet temperature and the water outlet temperature of the gas water heater and the internal water flow and the set temperature of the gas water heater are obtained; the real water flow is determined according to the internal water flow and a first function stored in the gas water heater, wherein the first function represents a corresponding relation between the real water flow and the internal water flow; the target heat output is determined according to the water inlet temperature, the set temperature and the real water flow; the initial proportional valve current is determined according to the target heat output; a difference value between the set temperature and the water outlet temperature is determined; a target proportional valve current is determined according to the difference value and the initial proportional valve current, and the current of a proportional valve of the gas water heater is adjusted according to the target proportional valve current; and the above steps are repeated until the difference value is less than or equal to a first temperature threshold value. Influences of water flow correction and water flow on heat efficiency are considered, and the accuracy of heat output calculation is guaranteed.
Description
technical field [0001] The invention relates to the technical field of water heaters, in particular to a constant temperature control method of a gas water heater and the gas water heater. Background technique [0002] At present, the constant temperature gas water heaters control the opening of the proportional valve by controlling the current of the proportional valve, thereby controlling the nozzle front pressure to adjust the heat load of the water heater, thereby controlling the heat output and outlet water temperature. This control relationship involves a conversion of energy. When heat input is converted into heat output, a part of energy will be lost. Heat output / heat input is defined as thermal efficiency, and thermal efficiency is a key factor affecting energy transfer efficiency. [0003] Assuming that the thermal efficiency of a water heater has always been a fixed value, then the corresponding relationship between heat input and heat output remains unchanged, an...
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IPC IPC(8): F24H9/20
Inventor 卢宇轩张其
Owner GUANGDONG VANWARD NEW ELECTRIC CO LTD