Temperature control method, temperature control device and electric water heater

Abstract

A temperature control method (10) is applied to an electric water heater (50). The electric water heater (50) comprises a heating tube for heating water. The temperature control method (10) comprisesthe steps of calculating the heating power of the heating tube (101); acquiring the working voltage of the heating tube (102); calculating the conduction time according to the working voltage in combination with the internal resistance, the working voltage and frequency of the voltage signal (103); and controlling the conduction of the heating tube according to the conduction time (104). By controlling the conduction time of the heating tube, the heating tube can heat at constant power, and the heating time of the electric water heater (50) to heat water to the target water temperature is controlled, and the water outlet temperature of the electric water heater (50) is ensured to be consistent, and the user experience is improved. The invention further discloses a temperature control device (40) and an electric water heater (50).

Description

technical field [0001] The embodiments of the present application relate to the technical field of smart home appliances, and in particular, relate to a temperature control method, a temperature control device, and an electric water heater for an electric water heater. Background technique [0002] With the development of my country's electric power industry and the improvement of living standards, the application of household electric water heaters is becoming more and more common. Most electric water heaters will have uneven water temperature during use, and the water temperature will gradually decrease after a period of time. [0003] The existing intelligent electric water heater obtains the temperature of the heated water through a temperature sensor and compares it with the target water temperature. When the temperature is lower than the target water temperature, the heating device is turned on, and when the temperature reaches the target water temperature, the heating ...

AI Technical Summary

Problems solved by technology

[0005] 1) The heating time of the electric water heater is difficult to predict, and the hot water can only be used after turning on the heating equipment for a period of time;

[0006] 2) The single-chip microcomputer needs to constantly compare the actual temperature with the target water temperature, which increases the burden on the single-chip microcomputer;

[0007] 3) The temperature control is not precise enough

This two-point temperature control method will cause the temperature to fluctuate within a certain range, and at the same time increase the switching times of the relay, which will affect the service life of the relay.

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