Gas water heater and control method thereof

Abstract

The invention relates to a gas water heater and a control method thereof. The method comprises the steps that after it is detected that a user stops using water, when water is started again within a preset duration, the current water inlet flow speed, the last water inlet flow speed and the heating starting duration are obtained; the constant-temperature heating power is determined according to the difference value between the current water inlet flow speed and the last water inlet flow speed; the overload heating duration is determined according to the current water inlet flow speed and the preset neutralization capacity; the overload heating power is determined according to the overload heating duration, the starting heating duration and the constant-temperature heating power, and the decreasing power is determined according to the overload heating power, the constant-temperature heating power and a preset time interval; and overload heating is started according to the overload heating power, the power is gradually reduced to constant-temperature heating power based on the decreasing power and the preset time interval, and continuous heating is performed at the constant-temperature heating power. According to the embodiment of the invention, heating is carried out in the overload heating stage and the power is decreased progressively, so that the constant-temperature time of starting and the water outlet temperature fluctuation are reduced.

Description

technical field [0001] The present application relates to the technical field of gas water heaters, in particular to a gas water heater and a control method thereof. Background technique [0002] Gas water heater, also known as gas high-temperature water heater, refers to a gas appliance that uses gas as fuel and transfers heat to low-temperature water flowing through a heat exchanger through combustion heating to achieve the purpose of preparing high-temperature water. When the user takes a bath, there is an operation of turning off the water and turning it on again. After turning it on again, it needs to be re-ignited for heating. After restarting and before re-igniting, there will be inflow of low-temperature water flowing out, resulting in a large temperature difference in the body and reducing the user's temperature. Experience, in order to make the difference between the outlet water temperature at the initial stage of water re-use and the temperature of the previous o...

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Problems solved by technology

[0004] In view of the shortcomings of the existing methods, the present application provides a gas water heater and its control method, which are used to solve the technical problems in the prior art that the constant temperature time of starting up is long and the temperature of the outlet water fluctuates greatly.

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