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An electric water heater and its control method

A technology for electric water heaters and relays, which is applied to fluid heaters, lighting and heating equipment, etc. It can solve problems such as loopholes, unknown safety hazards of water heaters, aging circuit environment design of live parts, etc.

Active Publication Date: 2019-11-05
QINGDAO ECONOMIC & TECHN DEV ZONE HAIER WATER HEATER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since electric water heaters use electric heating, the aging of live parts or loopholes in circuit environment design will bring great safety hazards to users.
[0003] In order to prevent the user from getting an electric shock while taking a bath, the existing water heater is equipped with leakage protection, that is, when the electric water heater leaks, the power supply of the electric water heater will be cut off to protect the user from electric shock. The leakage protection is a passive safety protection. The protection will only be triggered after the water heater leaks electricity, so usually the user only finds out that the water heater leaks electricity during the bathing process, and cannot know whether the water heater has a safety hazard before taking a bath, let alone what safety hazards the water heater has

Method used

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  • An electric water heater and its control method
  • An electric water heater and its control method
  • An electric water heater and its control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This embodiment provides an electric water heater, which can actively detect the safety status of the current power supply environment before the heating device is started. The structure of the electric water heater is as follows: figure 1 Shown:

[0051] The electric water heater includes an MCU control module, a power supply module and a heating device, the MCU control module is connected with the heating device through the power supply module, and the electric water heater also includes a power detection circuit, which is respectively connected with the MCU control module and the power supply module; the power detection The circuit is used to detect the voltage between the ground wire E and the ground terminal, the voltage between the ground wire E and the live wire L, and the voltage between the ground wire E and the neutral wire N; the MCU control module detects the voltage according to the power detection circuit. Logical judgment to determine whether the current ...

Embodiment 2

[0076] This embodiment provides a control method for an electric water heater, such as image 3 As shown, the method includes:

[0077] Step 101: Before starting the heating device, the human-computer interaction module sends an instruction for power environment safety detection to the MCU control module.

[0078] Specifically, when the user presses the button in the human-computer interaction module to detect the safety status of the current power supply environment, the human-computer interaction module sends an instruction to detect the safety of the power supply environment to the MCU control module. powered by.

[0079] Step 202: the MCU control module collects the electrical signal between the ground wire and the ground terminal in the power detection circuit.

[0080] Step 203: According to the collected signal, it is judged whether the current power supply environment is live or not.

[0081] If yes, go to step 204; if not, go to step 206.

[0082] Specifically, wh...

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Abstract

The invention provides an electric water heater and a control method. The electric water heater comprises an MCU control module, a power supply module and a heating device, wherein the MCU control module is connected to the heating device by the power supply module. The electric water heart also comprises a power supply detection circuit, wherein the power supply detection circuit is connected to the MCU control module and the power supply module respectively; the power supply detection circuit is used to detect a voltage between a ground wire and a grounding terminal, a voltage between the ground wire and a firing wire, and a voltage between the ground wire and a null line; and the MCU control module conducts logic judgment according to the voltages detected by the power supply detection circuit so as to determine whether a current power supply environment is safe. The electric water heater provided by the invention is characterized in that whether the current power supply environment is safe can be detected initiatively, and corresponding prompts can be sent to a user.

Description

technical field [0001] The invention relates to the technical field of household appliances, in particular to an electric water heater and a control method. Background technique [0002] At present, electric water heaters are loved by the public for their advantages such as fast heating speed, convenient temperature adjustment, high efficiency and energy saving, and non-polluting use, and have become the first choice for household bathing devices. Since the electric water heater adopts the working mode of electric heating, the aging of live parts or loopholes in circuit environment design will bring great potential safety hazards to users. [0003] In order to prevent the user from getting an electric shock while taking a bath, the existing water heater is equipped with leakage protection, that is, when the electric water heater leaks, the power supply of the electric water heater will be cut off to protect the user from electric shock. The leakage protection is a passive sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24H9/20
Inventor 杨平陈小雷张斌王爽陈圆圆
Owner QINGDAO ECONOMIC & TECHN DEV ZONE HAIER WATER HEATER