Split-type electric appliance anti-electric shock protection circuit

A technology for protecting circuits and preventing electric shocks, which is applied to emergency protection circuit devices, circuit devices, and automatic disconnection emergency protection devices.

Pending Publication Date: 2020-07-31
WUXI JINZER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, split-type electrical appliances (such as steam mops, etc.) directly replace the load when the load and the electrical appliance are disconnected when the power is turned on. The high-voltage output port of the electrical appliance is exposed, and there is a risk of electric shock.

Method used

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  • Split-type electric appliance anti-electric shock protection circuit

Examples

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0019] Such as figure 1 As shown, a split electric shock protection circuit proposed by the present invention includes:

[0020] Microprocessor U1, NPN transistor Q3, PNP transistor Q4, NPN transistor Q5, NPN transistor Q6, PNP transistor Q7, NPN transistor Q8, PNP transistor Q9, NMOS tube Q10, relay K1, resistors R11, R13, R14, R17, R19 , R20, R21, R22, R23, R24, R25, R27, diode D3, load connector P5;

[0021] One end of the resistor R21 is connected to a corresponding I / O output port of the microprocessor U1 (in this example, the 13th pin of U1), and the other end of the resistor R21 is connected to the base of the transistor Q6, one end of the resistor R20, the base of the transistor Q8 and one end of the resistor R24 The emitter of transistor Q6 and the other end of resistor R20 are grounded, the emitter of transistor Q8 and the other end of resistor R24 ...

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Abstract

The invention provides a split type electric appliance anti-electric shock protection circuit. The circuit comprises a microprocessor U1, an NPN triode Q3, a PNP triode Q4, an NPN triode Q5, an NPN triode Q6, a PNP triode Q7, an NPN triode Q8, a PNP triode Q9, an NMOS tube Q10, a relay K1, resistors R11, R13, R14, R17, R19, R20, R21, R22, R23, R24, R25 and R27, a diode D3 and a load connector P5 are included. A current detection circuit is arranged between the source electrode of the NMOS transistor Q10 and the ground; and the current detection circuit feeds back a detected current signal to the microprocessor U1. Whether a load is connected can be automatically judged, output is cut off when no load exists, the voltage supplied to the load is output only when the load exists, and the anti-electric shock protection function is achieved.

Description

technical field [0001] The invention relates to a protection circuit, in particular to an electric shock protection circuit. Background technique [0002] At present, when split-type electrical appliances (such as steam mops, etc.) are powered on, the load and the electrical appliance are disconnected and the load is directly replaced. The high-voltage output port of the electrical appliance is exposed, and there is a risk of electric shock. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the present invention provides a split-type electrical shock protection circuit, which can detect whether the load is connected, cut off the output when there is no load, and output the voltage to supply the load when there is a load, so that the split-type electrical appliance can be used safer. The technical scheme adopted in the present invention is: [0004] A split electric shock protection circuit for electric appliances, comprising: [0005] Micro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H5/12
CPCH02H5/12
Inventor 徐进朱洪卫
Owner WUXI JINZER TECH
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