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Electric water heater leakage detection system and electric water heater

A leakage detection, electric water heater technology, applied in fluid heaters, instruments, measuring electricity, etc., can solve problems such as bad experience

Active Publication Date: 2021-05-14
GUANGDONG MACRO GAS APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the grounding system of China's household power grid generally has a lack of ground wire or a virtual connection of the ground wire. The leakage of electric water heaters can be divided into two types: water heater insulation failure and reverse charging of the ground wire. This technology cannot distinguish whether it is caused by environmental electrification or the electric water heater itself. Caused by electric leakage, bad experience

Method used

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  • Electric water heater leakage detection system and electric water heater
  • Electric water heater leakage detection system and electric water heater
  • Electric water heater leakage detection system and electric water heater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as Figure 1-Figure 3 As shown, a leakage detection system for an electric water heater includes a leakage detection circuit 3 connected between the ground wire 1 of the power connector and the wall 2; it is characterized in that the leakage detection circuit 3 is connected to the main The controller 5 is connected, the input terminal of the photocoupler 4 is connected to the ground wire leakage detection circuit, and the output terminal of the photocoupler 4 is connected to the main controller 5; the main controller 5 detects the photocoupler 4 Whether there is a high level output > 3 seconds, if so, then disconnect the relay 7 that controls the electric heater 6; after the relay 7 is disconnected, the main controller 5 continues to detect whether the photocoupler has > 1 second High-level output, if there is, it is judged that the environmental ground wire is charged, if not, it is judged that the electric water heater itself is leaking.

[0027] Among them, in ...

Embodiment 2

[0032] An electric water heater is characterized in that it has the electric water heater leakage detection system as described in Embodiment 1.

[0033] The electric water heater provided in this embodiment has all the technical effects of Embodiment 1. As for the specific structure of the electric water heater, various structures that are known or can be realized in the future can be adopted, and will not be repeated here.

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Abstract

The invention discloses a leakage detection system for an electric water heater, which includes a leakage detection circuit connected between the ground wire of the power connector and the wall; it is characterized in that the leakage detection circuit is connected with the main controller of the electric water heater through a photocoupler, so that The ground wire leakage detection circuit of the input terminal of the photocoupler, the output terminal of the photocoupler is connected to the main controller; the main controller detects whether the photocoupler has a high level output > 3 seconds, If so, disconnect the relay controlling the electric heater; after the relay is disconnected, the main controller continues to detect whether the optocoupler has a high level output > 1 second, and if so, it is judged as the environmental ground Charged, if not, it is judged that the electric water heater itself is leaking. The invention also discloses an electric water heater.

Description

technical field [0001] The invention relates to the technical field of electric water heaters, in particular to an electric water heater leakage detection system and the electric water heater. Background technique [0002] An electric water heater refers to a water heater that uses electricity as energy for heating. During use, because the water flowing in the water heater is in direct contact with the human body, once the electricity leaks, the current passing through the water will pass through the human body, causing the human body to endanger life due to the leakage. Although the electric water heater itself is equipped with insulation protection, when the insulation is damaged due to aging or other reasons, the water heater also has the risk of leakage. [0003] At present, the leakage protection method of electric water heaters mostly adopts the method of water resistance (anti-electric wall) for protection against electric shock, and uses the live indicator light of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24H9/20G01R31/52G01R31/56
CPCF24H9/2014G01R31/52G01R31/56
Inventor 艾穗江李鹏飞邓海燕徐扬
Owner GUANGDONG MACRO GAS APPLIANCE
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