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Fire-fighting equipment power supply comprising AC220V voltage detection circuit

A technology of voltage detection circuit and fire-fighting equipment, applied in the direction of using AC to DC for measurement, irreversible AC power input to DC power output, etc., can solve the problems of instability, low detection accuracy of low-frequency transformer detection circuit, etc. The effect of improved insulation performance, fewer components, and cost reduction

Pending Publication Date: 2018-02-02
BAIYI LIGHTING (SHANGHAI) HLDG LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a fire-fighting equipment power supply including an AC220V voltage detection circuit, which is used to solve the problem of low detection accuracy and instability of the low-frequency transformer detection circuit used in the existing fire-fighting equipment power supply

Method used

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  • Fire-fighting equipment power supply comprising AC220V voltage detection circuit
  • Fire-fighting equipment power supply comprising AC220V voltage detection circuit

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Embodiment Construction

[0020] Such as figure 2 As shown, the fire-fighting equipment power supply of the present invention includes an EMI filter lightning protection circuit, a rectifier filter circuit, a power conversion circuit, a DC24V rectifier filter and a main-standby power conversion circuit connected in sequence, and the DC24V rectifier filter circuit is connected to the charging management circuit. The conversion circuit is connected to a 24V battery pack.

[0021] The fire-fighting equipment power supply of the present invention includes a high-voltage pulse width AC220V detection circuit and an MCU. The detection circuit includes a rectifier bridge BD1, and the input terminal of the rectifier bridge BD1 is connected to a voltage of AC220V to be detected. The two ends of the output of the rectifier bridge BD1 are respectively connected to the voltage regulator tube ZD1 and the voltage regulator tube ZD2 through the current limiting resistor. The positive pole of the pressure tube ZD2. ...

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Abstract

The invention discloses a fire-fighting equipment power supply comprising an AC220V voltage detection circuit, and the power supply comprises the AC220V voltage detection circuit and an MCU. The AC220V voltage detection circuit comprises a rectification bridge BD1, and the input end of the rectification bridge BD1 is connected to a to-be-detected AC220V voltage. Two output ends of the rectification bridge BD1 are respectively connected with a voltage stabilizing tube ZD1 and a voltage stabilizing tube ZD2 through a current limiting resistor. An output positive electrode of the rectification bridge BD1 is connected with a negative electrode of the voltage stabilizing tube ZD1 through a resistor R1, and an output negative electrode of the rectification bridge BD1 is connected with a positiveelectrode of the voltage stabilizing tube ZD2 through a resistor R3. The positive electrode of the voltage stabilizing tube ZD1 is connected with an input positive electrode of an optical coupler U1through a resistor R2. The negative electrode of the voltage stabilizing tube ZD2 is connected with an input negative electrode of the optical coupler U1. The collector electrode of the output end ofthe optical coupler U1 is connected with an IO input pin of the MCU, and the emitter electrode of the output end of the optical coupler U1 is grounded.

Description

technical field [0001] The invention belongs to the technical field of fire-fighting equipment, in particular to a fire-fighting equipment power supply including an AC220V voltage detection circuit. Background technique [0002] In the existing national standard GB 28184-2011 "Fire Equipment Power Supply Monitoring System", when it comes to AC grid voltage and backup power switching control, there are the following regulations: [0003] 4.2.1.3 Monitor power supply should be equipped with main power supply and backup power supply. When the fluctuation range of the AC power supply voltage is within the range of 85% to 110% of the rated voltage of 220V, the monitor should be able to work normally. [0004] 4.2.1.4 The power supply part of the monitor should have the function of converting main power supply and backup power supply. When the main power supply is disconnected, it can automatically switch to the backup power supply; when the main power supply is restored, it can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/12G01R19/22
CPCH02M7/12G01R19/22
Inventor 谢文学
Owner BAIYI LIGHTING (SHANGHAI) HLDG LTD
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