CN2220164Y

CN2220164Y - Ultrasonic wave electronical mosquito-repellent apparatus

Info

Publication number: CN2220164Y
Application number: CN 94230563
Authority: CN
Inventors: 王伟平; 李润华
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-11-02
Filing date: 1994-11-02
Publication date: 1996-02-21
Anticipated expiration: 2004-11-02

Abstract

The utility model relates to the electric apparatus products, in particular to an electronical mosquito-repellent apparatus for driving away mosquitoes. A tension relaxation oscillator whose main components are single transistors generates ultrasonic oscillation whose frequency is 21-23 kilohertz; ultrasonic signal is switched by an electroacoustical transducing circuit and is radiated out after that the ultrasonic signal is amplified by a power OTL amplifying circuit, and the radiation signal is the ultrasonic wave of analog male mosquitoes sound. The utility model ensures that people avoid being bit by mosquitoes in the season having mosquitoes; besides the utility model is not limited by conditions and places, and the installation is convenient.

Description

The ultrasonic electronic mosquito repellent

The utility model relates to electric equipment products, but a kind of electronic mosquito repellent of repel mosquitoes specifically.

Mosquito not only bites people's skin and flesh, sucking blood, and infects various diseases, and the healthy of people is affected.For fear of biting of mosquito, normally adopt mosquito net to stop mosquito, or use ways such as mosquito-repellent incense, electric heating mosquito repellent to come repel mosquitoes away from people near human body.The former need have certain mosquito net condition that mounts, and the people also feels sultry during use in mosquito net; Latter's scent of has most people to be difficult to adapt to, and harmful and unhelpful to health.

The purpose of this utility model is that the shortcoming at above-mentioned existence provides a kind of easy to use, and odorlessness is fit to the mosquito expelling equipment of people in various occasion repel mosquitoes.

Along with bionic continuous development, people have progressively disclosed some secrets and the characteristic of mosquito, though the kind of mosquito is not much use up thousand kinds down, its life habit still has some common characteristic.In general: male mosquito does not sting the people, it is made a living with the matter liquid of drinking dew and inhaling plant, and the female mosquito of bosom ovum stings the people, sucks blood to nourish the mosquito ovum with this and raise up seed, female mosquito dislikes contacting with male mosquito during the ovum of bosom, and it hears the just escape immediately of CF ultrasonic signal that male mosquito sends.In sum, developing and a kind ofly produce male mosquito and send the hyperacoustic mosquito expelling equipment of CF, reach the purpose of repel mosquitoes, is that people expect.

The utility model swings circuit by the Zhang Zhen that speeds, power amplification circuit, formations such as electroacoustic transduction circuit.It is characterized in that speeding the single-crystal mass BG1 emitter e and the first base stage b1 of Zhang Zhen's inductive circuit are respectively through potentiometer RW1, to power supply E with through coupling capacitance C ₃Transistor BG2 base stage to power amplification circuit; The transistor BG3 colelctor electrode that base stage links to each other with transistor BG2 emitter stage, the diode D that joins with it by negative pole connects the transistor BG4 base stage of electroacoustic change-over circuit, connects transistor BG5 base stage simultaneously; Transistor BG4 base stage and transistor BG5 emitter stage respectively through resistance and electric capacity to loudspeaker YD.

Appearance of the present utility model can make people in the season that mosquito exists, and is not subjected to mosquito bite, is not subjected to the restriction of condition and occasion.Easy for installation.Odorlessness during machine works, harmless.Its circuit structure is simple, is easy to processing, and is easy to carry, is suitable for family and field worker and uses.

Description of drawings:

Fig. 1 is this reality and novel block diagram

Fig. 2 is circuit theory diagrams of the present utility model

Be that to swing the supersonic oscillations frequency that circuit produces be the 21-23 kilohertz for the Zhang Zhen that speeds that critical piece constitutes by unijunction transistor BG1 in the utility model, ultrasonic signal is after the OTL power amplification circuit amplifies, and going this width of cloth to penetrate signal by the ejaculation of electroacoustic transduction circuit conversion back panel is exactly the ultrasonic that simulates male mosquito sound.

Operation principle is: by capacitor C 1, C2, and unijunction transistor BG1, potentiometer RW1, resistance R 1, the Zhang Zhen that speeds who waits parts to form swings circuit.Right when switch closure, voltage is added in b1, b2 two base terminals of BG1 respectively by resistance R 1, simultaneously again by 2 chargings of 1 pair of capacitor C of resistance R.The electric capacity both end voltage constantly rises, the edge is through unijunction transistor BG1, e, the electric current of b1 progressively increases, when the voltage U c on the capacitor C 2 is charged to the peak pressure of unijunction knot pipe BG1, e, resistance diminishes suddenly between b1, and by resistance R 2 discharges, at this moment the very fast decline of the voltage on the capacitor C 2, utilize this negative resistance phenomenon, when dropping to BG1, voltage is in the negative bias state, the e of unijunction transistor, low-resistance appears again in R2, has a big electric current to pass through on the R2 again, just obtains time dependent a succession of pulse voltage on the R2 that goes down so repeatedly, cycle is decided by the charging interval of R1 and C2, RW1, R1 is used for regulating frequency of oscillation, swings signal that circuit sends by coupling capacitance C3 by the Zhang Zhen that speeds then, delivers to the base stage of BG2 in the OTL power amplification circuit, BG2 is emitter follower RW2 in the OTL amplifier, R3 is a BG2 base resistance up and down, resistance R 4 is the emitter resistance of BG2, is again that BG3 amplifies the base resistance that promotes pipe, and regulator potentiometer RW2 can change the midpoint potential of OTL output.R5 is an isolation resistance, and C4 is a filter capacitor, and transistor BG4, BG5 are power amplifier tube.C5 is an output capacitance, and R6 is the BG4 base resistance, because the effect of diode D and BG3 ends BG4, BG4 conducting BG5 ends when diode D conducting during the BG5 conducting.When the positive half cycle of BG3 base input signal, the BG2 emitter stage is exported a negative signal to the BG3 base stage, the BG3 conducting, positive signal of BG3 colelctor electrode output is to the BG5 base stage, the BG5 conducting, at this moment BG4 ends, and electric current is by BG5 emitter capacity C5 → loudspeaker YD → output.When the input signal negative half period, BG5 is by the BG4 conducting, and signal is by BG3 colelctor electrode, diode D, transistor, BG4 base stage, capacitor C 5, loudspeaker YD output.Because BG4, BG5 two pipe alternations go round and begin again, so synthesized a complete waveform on load end YD.

Claims

1, a kind of ultrasonic electronic mosquito repellent comprises by oscillating circuit, electroacoustic transduction circuit, and the Zhang Zhen that it is characterized in that speeding swings the single-crystal mass BG1 of circuit, and the emitter e and the first base stage b1 are respectively through potentiometer RW1, to power supply E with through coupling capacitance C ₃Transistor BG2 base stage to power amplification circuit; The transistor BG3 colelctor electrode that base stage links to each other with transistor BG2 emitter stage, the diode D that joins with it by negative pole connects the transistor BG4 base stage of electroacoustic change-over circuit, connects transistor BG5 base stage simultaneously; Transistor BG4 base stage and transistor BG5 emitter stage respectively through resistance and electric capacity to loudspeaker YD.

2,, it is characterized in that the supersonic oscillations frequency of speeding to produce according to oscillating circuit is the 21-23 kilohertz according to the described mosquito expelling equipment of claim 1.