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A constant current source power supply circuit for a point-type photoelectric smoke detector

A photoelectric smoke and power supply circuit technology, which is applied to fire alarms, instruments, and electrical variables that rely on smoke/gas effects. Withstand voltage value, current consumption reduction, and cost reduction effects

Active Publication Date: 2016-05-25
深圳前海奥瑞那安全技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a constant current source power supply circuit of a point-type photoelectric smoke detector to solve the problem that the current consumption of the voltage stabilizing circuit of the existing point-type fire detector is too large, which causes the load of the circuit to drop and causes a large error

Method used

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  • A constant current source power supply circuit for a point-type photoelectric smoke detector
  • A constant current source power supply circuit for a point-type photoelectric smoke detector
  • A constant current source power supply circuit for a point-type photoelectric smoke detector

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Embodiment Construction

[0015] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0016] Such as figure 2 As shown, the power supply circuit of the point-type fire detector provided by the present invention is mainly composed of a single chip microcomputer, a data sending and receiving circuit, a transmitting circuit, a receiving circuit, an operational amplifier circuit, an initiating vibration circuit and a constant current source power supply circuit.

[0017] Such as image 3 As shown, the constant current source power supply circuit of the point-type photoelect...

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Abstract

The invention discloses a constant flow source power supply circuit of a point pattern photoelectric smoke detector. The constant flow source power supply circuit comprises an amplifying circuit, and a current reference circuit is joined between a power input end of the amplifying circuit and the amplifying circuit. According to the invention, the problem of greater error brought about by the reduction of loop loading caused by the over-consumed current of the voltage stabilizing circuit of the existing point pattern photoelectric smoke detector is solved, the circuit has higher pressure resistance, does not use special elements, is easy to set up and debug, and is good for lowering the cost of products.

Description

technical field [0001] The invention relates to a power supply circuit for a photoelectric smoke detector, in particular to a constant current source power supply circuit for a point-type photoelectric smoke detector. Background technique [0002] The operating principle of existing point-type photoelectric smoke detectors (point-type fire detectors) is: the concentration of smoke is measured by infrared light sensors, and the infrared light beam deviates from the sensor during the structural design of the labyrinth of the detector. When smoke enters the maze, smoke particles scatter part of the light beam onto the sensor. As the concentration of smoke increases, more light beams are scattered onto the sensor. When the light beam reaching the sensor reaches a certain level, the detector will alarm, and the indicator light of the detector is always on when the alarm occurs, and feeds back the fire alarm signal to the controller until the controller is reset. The controller ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/46G08B17/10
Inventor 邱文波胡晓华康卫东
Owner 深圳前海奥瑞那安全技术有限公司