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Pyroelectric infrared automatic hand drier

A technology of pyro-infrared and hand dryers, applied in the electronic field, can solve the problems of using many electrical components, high failure rate, complex control circuit, etc., and achieve the effect of fewer electrical components, low failure rate and simple control circuit

Inactive Publication Date: 2017-02-01
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a pyro-infrared automatic hand dryer to solve the problems that the conventional infrared induction circuit used in the existing hand dryer involves transmitting and receiving devices, using many electrical components, complicated control circuits, and high failure rate.

Method used

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  • Pyroelectric infrared automatic hand drier

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings.

[0013] Such as figure 1 As shown, the circuit of the pyro-infrared automatic hand dryer of the present invention uses 220V mains electricity to be transformed by transformer T1 and full-wave rectified by rectifier bridge D1-D4, and then filtered by capacitor C1 in turn, stabilized by three-terminal voltage regulator 7806, and capacitor After filtering by C2, a DC 6V power supply is obtained to supply power to the infrared induction control circuit of the subsequent stage.

[0014] The infrared sensing control circuit is constructed by using the human body pyroelectric infrared sensor SD02 module and the time base circuit NE555 chip, the 6V power supply is connected to the 1-pin power input terminal of the SD02 module, the 3-pin grounding terminal of the SD02 module is grounded, and the 2-pin output terminal is connected to The positive pole of capacitor C3 and one end...

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Abstract

The invention provides a pyroelectric infrared automatic hand drier. A circuit of the pyroelectric infrared automatic hand drier is provided with an infrared induction control circuit; the infrared induction control circuit is constructed by use of a human body pyroelectric infrared sensor SD02 module and a time-base circuit NE555 chip; the human body pyroelectric infrared sensor is used for inducing hands so as to control the output state of the NE555 chip; the output of the NE555 chip is utilized to control actuation and release of a control relay K so as to control the start and stop of operation of a PTC heater and a fan motor M. Compared with a hand drier adopting a conventional infrared induction circuit, the pyroelectric infrared automatic hand drier is capable of directly inducing pyroelectricity infrared rays of a human body, dispenses with an infrared emission device and an infrared receiving device, is free from obstruction of obstacles and influence of other light rays, and is stable in working performance; furthermore, the hand drier provided by the invention is less in used electric elements, simple in control circuit, low in failure rate and worthy of popularization.

Description

technical field [0001] The invention relates to a hand dryer, in particular to a thermal release infrared automatic hand dryer, which belongs to the field of electronic technology. Background technique [0002] In public places such as schools, airports, stations, hotels, stadiums, etc., people often do not have suitable towels to wipe their hands after washing their hands. The wet hands can only be dried as much as possible or wiped on the clothes. It is unhygienic to set up public towels. Therefore, there are automatic hand dryers specially equipped for public places on the market. After washing your hands, put your hands under the air outlet of the automatic hand dryer, and the automatic hand dryer will automatically send out comfortable cold or hot air to dry your hands quickly, and when your hands leave the air outlet of the automatic hand dryer, it will It also automatically stops the wind and shuts down, which is very convenient. In order to realize the above-mentio...

Claims

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Application Information

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IPC IPC(8): A47K10/48H03K17/955
CPCA47K10/48H03K17/955
Inventor 龙邹
Owner GUANGXI UNIV
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