Electric water heater

Abstract

The invention discloses an electric water heater. The electric water heater comprises an alternating-current power supply, a heating module, an electric leakage detection key, an electric leakage detection module, a central control unit and a power control module, wherein the alternating-current power supply is used for providing power supply voltage for heating for the heating module; the heating module is used for heating water in a liner of the electric water heater; the electric leakage detection key is used for outputting an electric leakage detection key signal; the electric leakage detection module is used for detecting the live wire current and null line current of the alternating-current power supply; the central control unit is used for judging whether or not the electric water heater leaks current according to the live wire current and the null line current, and outputting a corresponding control signal to the control end of the power control module according to a judgment result in order to control the switch-on and switch-off states of the heating module and the alternating-current power supply; the power control module is used for executing the switch-on and switch-off actions of the heating module and the alternating-current power supply. By adopting the electric water heater, the potential safety hazard of electric leakage can be reduced, and the concern of a user about the safety of a product can be eliminated.

Description

technical field [0001] The invention relates to the technical field of household appliances, in particular to an electric water heater. Background technique [0002] The live parts of the electric water heater (such as the heater) will age after long-term use, and the aging of the live parts may lead to leakage. However, the user cannot detect whether the electric water heater will leak during the use of the electric water heater. The product has safety concerns, and there are also safety hazards. [0003] In the prior art, there are mainly the following two methods for detecting leakage of electric water heaters: (1) using a power plug with a leakage protection device; When the electric water heater leaks electricity, cut off the power supply of the heater, so as to ensure the safety of users. However, the defect in the above method (1) is: the leakage protection device is arranged on the power plug, but the installation position of the power socket is usually relatively ...

AI Technical Summary

Problems solved by technology

However, the defect in the above method (1) is: the leakage protection device is arranged on the power plug, but the installation position of the power socket is usually relatively high, which makes the user's operation very inconvenient, and the leakage protection device is used to implement The components of the leakage protection action are usually mechanical switches, and when the mechanical switch is operated too many times, it is prone to misoperation or non-operation, thus there is a certain potential safety hazard; and the defect of the above method (2) is: the leakage protection The module is set on the power board, and only when the leakage protection module detects a leakage, the power supply of the heater is cut off. This protection method is a passive protection method, and the user cannot actively check whether the leakage protection module itself is working normally. Testing and verification, there are potential safety hazards, which makes users have safety concerns about the product

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