Automatic exhaust fan

An exhaust fan, automatic technology, applied in the direction of machine/engine, pump control, non-variable pump, etc., can solve the problem that the middle exhaust fan cannot be automatically started and stopped

Inactive Publication Date: 2005-03-30
陈俊郎
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiency that the middle exhaust fan of the above-mentioned technology cannot be automatically started and stopped, the present invention provides a control switch that utilizes gas, harmful gas alarm, automatic exclusion and humidity automatic control circuit. Unique "sense of smell" automatically and effectively detects harmful gases such as damp and odor, gas or carbon monoxide in the kitchen or bathroom, and then automatically starts and stops an automatic exhaust fan

Method used

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Embodiment Construction

[0019] see figure 1 , figure 2 , automatic exhaust fan, including exhaust fan body, drive motor M1 and harmful gas alarm automatic exclusion and humidity automatic control circuit, the harmful gas alarm automatic exclusion and humidity automatic control circuit includes power supply, gas sensitivity detection circuit and humidity detection circuit, said The harmful gas alarm automatic exclusion and humidity automatic control circuit is also equipped with a microcontroller MCU and a control switch Q4. The control switch Q4 is connected, and the other end of the control switch Q4 is connected with the driving motor M1.

[0020] An alarm circuit is connected to the output end of the microcontroller MCU, and the alarm circuit includes an indicator light circuit and a buzzer circuit, and the indicator light circuit and the buzzer circuit are respectively connected to the output end of the microcontroller MCU.

[0021] The microcontroller MCU is a single-chip microcomputer (SN8P1...

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Abstract

The invention relates to a kind of automatic exhaust fan. It includes exhaust fan body, drive motor, harmful gas alarm automatic elimination and humidity automatic control circuit. The harmful gas alarm automatic elimination and humidity automatic control circuit includes electric power supply, gas-sensitive testing circuit, humidity testing circuit, and it is also installed with microcontroller and control switch. The input end of the microcontroller is each connected to the gas-sensitive testing circuit, humidity testing circuit. The output end of the microcontroller is connected to the control switch. The other end of the control switch is connected to the drive motor. The advantage of the invention is that the harmful gas alarm automatic elimination and humidity automatic control circuit is used as control switch; and can automatically and effectively test the dampness, fetor, harmful gas such as coal gas, carbon monoxide, and so on, in kitchen or toilet by its unique ' olfaction'; then it can realize open or stop automatically.

Description

technical field [0001] The invention relates to an exhaust fan, in particular to an exhaust fan which automatically shuts down harmful gases such as damp odor, carbon monoxide, and gas. Background technique [0002] At present, most of the existing exhaust fans are composed of an exhaust fan installed in the casing, a motor driving the exhaust fan and a circuit for controlling the operation of the motor. The control circuit of the motor driving the exhaust fan is controlled by a manual switch. , the exhaust fan starts to work, and when the manual switch is turned off, the exhaust fan stops working. In real life, such as kitchens and bathrooms, there are damp odors, or leaking gas or unburned carbon monoxide and other harmful gases. When using manual switch control When exhausting fans, since the concentration of harmful gases cannot be automatically monitored and exhausted in real time, it often causes personnel poisoning and even accidents such as gas explosions. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D27/00
Inventor 陈俊郎
Owner 陈俊郎
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