Leakage protector circuit for electric water heater

A technology for leakage protection and electric water heaters, which is applied to emergency protection circuit devices, circuit devices, emergency protection devices for automatic disconnection, etc., and can solve problems such as human injury, death, and failure to protect

Inactive Publication Date: 2007-12-26
SAKURA BATH & KITCHEN PRODS CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention overcomes the disadvantage that the existing earth leakage protector for electric water heater will not have a protective effect if there is no ground wire or if the ground wire is accidentally electrified, which will cause harm to the human body and even cause death

Method used

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  • Leakage protector circuit for electric water heater
  • Leakage protector circuit for electric water heater
  • Leakage protector circuit for electric water heater

Examples

Experimental program
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Effect test

Embodiment

[0015] Embodiment: Referring to Fig. 3, a leakage protection circuit for an electric water heater is composed of a power supply polarity detection circuit A, a power supply polarity conversion circuit B, a polarity conversion self-locking circuit C, a leakage protection relay D, a leakage detection comparison circuit H, Leakage protection execution circuit F is composed of mains power input from the phase line L and neutral line N of the power polarity detection circuit A, and then output to the electric water heater G through the power polarity conversion circuit B, between the power polarity conversion circuit B and the electric water heater A leakage protection relay D is set between G, a polarity conversion self-locking circuit C is connected between the power polarity detection circuit A and the power polarity conversion circuit B, and the input terminal of the leakage detection comparison circuit H is connected to the neutral line N and the ground line E, The signal line ...

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PUM

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Abstract

A leakage protector circuit for electric water heater is used in leakage protection in case of ineffective earthed ground wire. It consists of power polarity detecting and converting circuit, polarity conversion self-locking circuit, leakage protecting relay, leakage detecting comparator circuit and protection executing circuit. The electric supply is input to the leakage protector circuit from the power polarity detecting circuit and made to pass through the said circuits connected successively before being fed to electric water heater. In case of ineffective earthed ground wire, the present invention can result in safeguard effect.

Description

Technical field [0001] The invention relates to a leakage protection circuit, in particular to a leakage protection circuit of a household type electric water heater. Background technique [0002] Currently commonly used electric water heater circuit connections are shown in Figure 1 and Figure 2. In Figure 1 and Figure 2: phase line L, ground line E, neutral line N, electric water heater system controller and leakage protector 3, electric water heater socket 4 and electric water heater plug 5; see Figure 1, this leakage protector can work normally in the following two situations: ①. When the electric heating tube 1 bursts in the water tank due to poor insulation or in the middle of use, at this time, the shell of the electric water heater water tank And water, will have a certain intensity of voltage, if the current intensity of the voltage is greater than the start protection parameters of the leakage protector 2, the leakage protector 2 will start and cut off the power, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/14H02H11/00
Inventor 廖金柱
Owner SAKURA BATH & KITCHEN PRODS CHINA
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