Gas water heater and its control method

Abstract

The present invention proposes a gas water heater and its control method, wherein the control method includes the following steps: detecting the water flow signal of the gas water heater; judging whether the water flow is greater than or equal to the preset water flow according to the water flow signal; if the water flow is greater than If the water flow rate is equal to or equal to the preset water flow rate, timing is performed, and it is further judged whether the timing time is greater than the preset time; if the timing time is greater than or equal to the preset time, the gas water heater is controlled to start heating. The gas water heater and its control method of the present invention can judge whether there is really water flowing through the gas water heater, and heat the gas water heater in a short time after it is turned on, and can prevent the gas water heater from malfunctioning.

Description

technical field [0001] The invention relates to the technical field of electric appliance manufacturing, in particular to a gas water heater and a control method thereof. Background technique [0002] Gas water heater is a relatively common household appliance, which provides great convenience to people. Most gas water heaters use a Hall-type water flow sensor to sense the water flow, and judge the current water flow by detecting the number of pulses returned by the water flow sensor per unit time. If there is no hot water for a long time after turning on the faucet, the water flow will be wasted. On the contrary, if the water flow is detected in a short time and the water heater is turned on, when the water is turned off at the same place as the water inlet pipe of the water heater, it will be harmful. The water inlet of the water heater caused an impact, which caused the water heater to malfunction. [0003] In addition, the existing Hall-type water flow sensors generall...

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Problems solved by technology

For example, practice has proved that when the distance between the kitchen faucet and the water heater inlet faucet is within 10 meters, and the water pressure is above 0.2MPa (MPa), the water flow sensor of the water heater will send a signal with a pulse exceeding 3L when the kitchen faucet is turned on and off. , and the time can reach 600-700 milliseconds, if the detection time of water flow is lower than this value and the water heater is turned on, it will cause the water heater to malfunction, thus causing the illusion of water heater failure

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