Combustible-gas-self-adapting combustible gas water heater and control method thereof

Abstract

The invention discloses a combustible-gas-self-adapting combustible gas water heater and a control method thereof. The combustible gas water heater comprises a combustion flame grate, a flame grate switch valve, a combustible gas proportioning valve, a total combustible gas switch valve, a fan, a primary pressure sensor, a secondary pressure sensor, a controller and a combustible gas pipeline, wherein the flame grate switch valve, combustible gas proportioning valve and total combustible gas switch valve are sequentially arranged on the combustible gas pipeline from top to bottom; the primary pressure sensor is arranged on the combustible gas pipeline between the total combustible gas switch valve and a combustible gas inlet; the secondary pressure sensor is arranged on the combustible gas pipeline between the combustible gas proportioning valve and the flame grate switch valve; and the controller is provided with a display unit. The water heater can automatically sense the combustible gas pressure variation condition, can automatically correct the deviation of the proportioning valve so that the combustion working condition is stabler, and can automatically regulate the ignition and the high / low load pressure, thereby ensuring that the user can use the water heater under the condition of both high and low gas pressures, and enhancing the adaptability of the combustible gas water heater.

Description

technical field [0001] The invention belongs to the technical field of water heaters, and in particular relates to a gas adaptive gas water heater and a control method thereof. Background technique [0002] Gas water heaters have become a necessity in family life. Especially the gas water heater with constant temperature function provides us with various hot water with constant temperature: before going to bed, we can take a hot bath comfortably to relieve fatigue; in cold winter, we will not let us use Wash vegetables with cold water; in the morning, let us wash comfortably with warm water; after meals, wash dishes with suitable hot water. [0003] However, just when we are becoming more and more inseparable from it, it brings us a series of problems: when the gas pressure is higher or lower than the national standard pressure, various failures will occur in the water heater, such as flameout, Excessive emissions and reduced combustion efficiency. In severe cases, it w...

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Problems solved by technology

[0003] However, just when we are becoming more and more inseparable from it, it has brought us a series of problems: when the gas pressure is higher or lower than the national standard pressure, various failures will occur in the water heater, such as flameout, Excessive emissions and reduced combustion efficiency, etc.

In severe cases, it will also lead to the inability to use the water heater, which brings inconvenience to our life

[0004] The existing domestic gas water heaters cannot realize the automatic detection and adjustment of gas pressure, so that when the gas pressure is low, the water heater cannot sense it, but still operates according to the program when the gas pressure is normal

On the one hand, due to the low gas pressure, the gas supply is insufficient, causing the water heater to go out; The efficiency is reduced, which reduces the water production capacity of the water heater, resulting in a cooler outlet water temperature

[0005] In the actual application process, on the one hand, there is a certain deviation in the gas proportional valve itself, which leads to the deviation of the firepower; There are flameout, deterioration of combustion conditions, excessive smoke emissions, and reduced thermal efficiency.

[0006] In the production process of water heaters, each water heater must adjust its ignition secondary pressure, small load secondary pressure, and large load secondary pressure to within the specified range, and these pressure adjustments are all manually adjusted, resulting in low production efficiency

[0007] When the secondary pressure of the gas changes, the controller cannot sense it, but still operates according to the normal pressure program, and there will be phenomena such as flameout and excessive emissions, especially when working with a small load, if the secondary pressure is low, it is easy to Cause the water heater to turn off; when the gas supply pressure of natural gas, liquefied petroleum gas, and artificial gas in the user's home is low, the output gas pressure (secondary pressure) of the proportional valve is low, causing the water heater to turn off and cannot be used; the ignition secondary pressure of the water heater , The adjustment of the secondary pressure of small load and the secondary pressure of large load is manually adjusted, and the production efficiency is low

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