Water heater and method for calculating left bath time of water heater

Abstract

The invention discloses a method for calculating the left bath time of a water heater. The method includes the following steps that initial parameters of the water heater are acquired; according to the initial parameters, parameters of a two-dimensional data model are determined, and a two-dimensional data model is established; according to the parameters of the two-dimensional data model and a temperature distribution estimation method, the initial temperature distribution in a water heater inner container is estimated; according to the initial temperature distribution in the water heater inner container, real-time temperature in the water heater inner container is calculated with a temperature iteration method; according to the real-time temperature in the water heater inner container and the parameters of the two-dimensional data model, the left bath time of the water heater is calculated. Through the method for calculating the left bath time of the water heater, the precision of prediction of left hot water of the water heater can be substantially improved, extra elements do not need to be added, certain adaptive ability is achieved, the development time of the product can be greatly shortened, and the efficiency of the product is improved. The invention further discloses the water heater.

Description

technical field [0001] The invention relates to the technical field of electrical appliances, in particular to a method for calculating the remaining bathing time of a water heater, and a water heater. Background technique [0002] At present, the commonly used storage-type electric water heaters have the function of displaying the remaining hot water. However, the remaining hot water is only calculated according to the temperature of the hot water at the water outlet, which is only a reference and not practical. For example, a solution is disclosed in the related art: a number of temperature sensors are arranged on the surface of the inner tank, and the positions of the sensors are related to the distance from the sensors to the central axis of the inner tank. Then, the amount of hot water in the tank is determined according to the pre-established mapping table between the temperature change value and the amount of hot water, and displayed by the display device. The above-...

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Problems solved by technology

The above-mentioned tables tested based on experimental data are mainly empirical data, but the remaining hot water of the water heater itself depends on many factors. The quantity is not the same, it is not operable

In addition, related patents describe a system that divides the inner tank into three layers to calculate the amount of hot water based on the water temperature collected by three sensors in the inner tank, and simultaneously collects the temperature and flow rate of the incoming and outgoing water. Through mathematical calculations, the remaining hot water can be calculated. A control method of using time. This patent simply stratifies the water heater and makes a rough approximation. Due to the flow sensor of the water he

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