CN2556855Y

CN2556855Y - Delay switch for exhaust fan

Info

Publication number: CN2556855Y
Application number: CN 02267909
Authority: CN
Inventors: 王振爱; 杜升明
Original assignee: WANG ZHEN'AI
Current assignee: WANG ZHEN'AI
Priority date: 2002-06-25
Filing date: 2002-06-25
Publication date: 2003-06-18
Anticipated expiration: 2012-06-25

Abstract

The utility model relates to an exhaust fan time delay switch, which comprises an electricity source circuit, a time delay circuit and a control circuit. The utility model adopts a double-line typed structure, can directly use the commercial power to supply power, and takes the time base integrated circuit 555 as a timing element, thus having stable and reliable time delay function, low cost, simple installation of the connection and convenient operation. The utility model can be arranged in the cassette of the wall switch, and also can be made as a standard wall switch with a plurality of common switches; therefore, the utility model can replace the electrical source of the existing exhaust fan, and has high generalizing using value.

Description

The ventilating fan delay switch

Affiliated technical field

The utility model belongs to the delay switch technical field that is used for circuit control, particularly relates to a kind of delay switch that is used to control ventilation fan.

Background technology

Along with China's economy continues development at a high speed, people's living standard and quality of life have obtained further raising, it is more and more that household electrical appliance such as ventilating fan use, these electrical equipment are when improving people's quality of life, the energy that consumes and waste is more and more, and saving effectively and using our the limited energy has been a problem that presses for solution.In life, we often run into such situation, and the ventilating fan that is exactly the toilet is difficult to turn off on time.Do not need out ventilating fan when the people goes to toilet, the final vacuum that goes to toilet fan is started working, and normal value needs a few minutes get final product, the time again length be to waste.In general the no one closed ventilating fan in last a few minutes such as toilets again after going to toilet, and had often forgotten again after leaving to return to close, and ventilating fan will change long time.Like this, not only wasted electric energy, produced noise, and ventilating fan also damages easily.Time-delay products such as the time relay of seeing on the market at present, cost height, installation wiring complexity, in case and place in circuit, all consumed powers of whether working are not suitable for ventilating fan and use.

Summary of the invention

The purpose of this utility model provide a kind of cost low, the simple ventilating fan delay switch of wiring is installed.

The technical solution adopted in the utility model is: it comprises based on the delay circuit of time-base integrated circuit 555 and control circuit and the power circuit that links to each other with the delay circuit output.Power circuit is connected in the civil power, and provides stable 5V direct voltage, power circuit to comprise diode D1 and D2, voltage-stabiliser tube VZ, capacitor C 2.The relay R E1 of the output Q Drive and Control Circuit in the delay circuit.Described delay circuit is made of time-base integrated circuit U1, resistance R 1 and capacitor C 1.Described control circuit is made of the relay R E1 with one group of normally opened contact, diode D3 and normally open push button switch K.The puncture voltage of voltage-stabiliser tube VZ in the described power circuit is about 5V.Button switch K in the described control circuit has the driving force of 500V/1A.By A.C. contactor dilatation, can realize that any high-power electric appliance automatic time delay closes and open.

The utility model cost is low, and the installation wiring is simple, easy to operate, can be contained in the magazine of switch on wall, also can make the standard wall switch together, thereby can replace the mains switch of existing ventilating fan, have very high popularizing value with several regular taps.

Description of drawings

Fig. 1 is circuit theory diagrams of the present utility model.

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

Embodiment

In the embodiment that Fig. 1 provides, it comprises power circuit, delay circuit and control circuit.Power circuit is by diode D1, D2, capacitor C 2, and voltage-stabiliser tube VZ forms.Diode D1 plays rectified action, for entire circuit provides DC power supply; The effect of diode D2 is that the other half cycle for AC power provides path; Capacitor C 2 effect is filtering, and voltage-stabiliser tube VZ is the voltage-stabiliser tube about 5V, is for circuit provides the galvanic current source on the one hand, be on the other hand for restricting circuits too much take electric energy, thereby reduce influence to electrical equipment, this is a distinctive feature of the present utility model.Time base integrated package U1, resistance R 1 and capacitor C 1 are formed monostable circuit, realize delay function.Control circuit is made up of relay R E1, diode D3 and button switch K.Load is ventilation fan FAN.Power supply is the alternating current of 110V～380V.

After pressing K switch, ventilation fan powers up work, and power circuit produces the 5V direct voltage simultaneously, and entire circuit is started working.Because the voltage of capacitor C 1 can not suddenly change, (following represent) Vc1＜1/3Vcc so 2, the 6 pin voltages of time base integrated package U1 (time base integrated package U1 4,8 pin voltages) with Vc1, the 3 pin output high level of time base integrated package U1, relay R E1 adhesive, its normally opened contact is with button K short circuit.At this moment release button K, circuit can not disconnect.

Because resistance R 1 gives capacitor C 1 charging, the voltage of capacitor C 1 raises gradually, through Vc1＞2/3Vcc after some time, the 3 pin upset of time base integrated package U1, output low level, relay R E1 discharges, normal opened contact disconnects, and entire circuit is turn-offed, and delay time length is subjected to resistance R 1 and capacitor C 1 control.If R1=510 kilohm of power taking resistance, capacitor C 1=470 microfarad, delay time then of the present utility model is 3 minutes, can meet the demands.

Embodiment changes ventilation fan FAN into A.C. contactor CJ and often opens and normally-closed contact by it as shown in Figure 2, controls high power load RL1 and RL2 respectively, can realize high power load RL1 time delayed turn-off, high power load RL2 delayed start-up.

Claims

1, a kind of ventilating fan delay switch, comprise based on the delay circuit of time-base integrated circuit 555 and control circuit and the power circuit that links to each other with the delay circuit output, it is characterized in that power circuit is connected in the civil power, and provide stable 5V direct voltage, power circuit comprises diode D1 and D2, voltage-stabiliser tube VZ, capacitor C 2, the relay R E1 of the output Q Drive and Control Circuit in the delay circuit.

2,, it is characterized in that said delay circuit is made of time-base integrated circuit U1, resistance R 1 and capacitor C 1 according to the described delay switch of claim 1.

3,, it is characterized in that said control circuit is made of the relay R E1 with one group of normally opened contact, diode D3 and normally open push button switch K according to the described delay switch of claim 1.

4, according to the described delay switch of claim 1, the puncture voltage that it is characterized in that the voltage-stabiliser tube VZ in the said power circuit is 5V.