Zero cold water heater control method and zero cold water heater

Abstract

The invention relates to a zero cold water heater control method and a zero cold water heater. The method comprises the steps that after zero cold water preheating is finished, when it is detected that the water flow is larger than the preset starting water flow, the first inlet water temperature and the first inlet water flow of unheated inlet water are obtained, and the ignition process is started; according to a preset target outlet water temperature, the first inlet water temperature and the first inlet water flow, a superposed heating load is determined; when it is detected that ignition succeeds, superposition heating is conducted on current inlet water within the superposition heating duration according to the sum of the normal heating load and the superposition heating load, so that the water temperature obtained after the unheated inlet water and the superposition heated inlet water are mixed in a water mixing bin reaches the target outlet water temperature; the superposed heating duration is the duration from starting of the ignition process to successful ignition, and the normal heating load is the heating load corresponding to heating the current inlet water to the target outlet water temperature. The user experience can be improved by adopting the method.

Description

technical field [0001] The present application relates to the technical field of smart home appliances, in particular to a control method of a zero-cold water heater and a zero-cold water heater. Background technique [0002] At present, the zero-cold water heater can ensure that when the user wants to use hot water, the water can be boiled to produce hot water, and there is no need to turn on the water and wait for the water temperature to rise. Compared with ordinary gas water heaters, it can provide users with a more comfortable and convenient experience. The main principle is: after the user activates the zero cold water function, the zero cold water water heater drives the water circulation in the pipeline through the water pump, and ignites and heats up, so that the water temperature in the pipeline reaches the target outlet water temperature, and hot water can be produced when the water is boiled. [0003] When the water temperature in the pipeline reaches the target ...

AI Technical Summary

Problems solved by technology

Afterwards, when the user uses hot water, there is a certain delay due to the re-ignition of the zero-cold water heater. During this delay, the cold water flowing into the zero-cold water heater from the tap water pipe is not heated. A period of cold water flows out, which leads to poor user experience

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