CN205173025U - Energy -conserving air discharge fan automatic control circuit - Google Patents

Abstract

The utility model discloses an energy -conserving air discharge fan automatic control circuit, including rectifier bridge T, triode V1, resistance R8 and unidirectional thyristor Q1, motor M are connected to rectifier bridge T's port 1 connecting resistance R8, resistance R9, triode V1's projecting pole and unidirectional thyristor Q1's positive pole, rectifier bridge T's port 2, and the 220V alternating current is connected to electrode M's the other end, rectifier bridge T's 4 other ends of connecting the 220V alternating currents of port, triode V1's collecting electrode connecting resistance R5, resistance R10 and diode D2's negative pole. The utility model discloses energy -conserving air discharge fan automatic control circuit simple structure, components and parts are few, utilize the time delay work of triode and unidirectional thyristor's on -state characteristic control air discharge fan to still setting up the long term operation and but trading the component, be applicable to different demands, the stand -by power consumption is low simultaneously, consequently has electric energy, convenient to use and the manifold advantage of function of saving.

Description

A kind of energy-conservation ventilating fan automatic control circuit

Technical field

The utility model relates to a kind of ventilating fan circuit, specifically a kind of energy-conservation ventilating fan automatic control circuit.

Background technique

Ventilating fan is an indispensable part in modern toilet, it can be good the gas exchanges carried out in toilet, pure and fresh air is brought to inside, toilet, especially in public places, flow of personnel amount is large, the probability causing the gas having peculiar smell to occur increases, the bathroom exhaust fan of major part public place is switch type or opening state all the time, wherein switch type needs artificial control, be easy to forget shutoff when leaving, and open air bells exhauster all the time and can cause very large waste of energy, be unfavorable for energy saving, ventilating fan many uses 555 chip that minority controls with Intelligent time delay is as control unit, the interference free performance of 555 is poor, also there is shortcoming in degree of accuracy, therefore need to be improved.

Model utility content

The purpose of this utility model is to provide a kind of energy-conservation ventilating fan automatic control circuit, to solve the problem proposed in above-mentioned background technology.

For achieving the above object, the utility model provides following technological scheme:

A kind of energy-conservation ventilating fan automatic control circuit, comprise rectifier bridge T, triode V1, resistance R8 and unidirectional thyristor Q1, the port one contact resistance R8 of described rectifier bridge T, resistance R9, the emitter of triode V1 and the anode of unidirectional thyristor Q1, the port 2 of rectifier bridge T connects motor M, the other end of electrode M connects 220V Ac, the port 4 of rectifier bridge T connects the other end of 220V Ac, the collector electrode contact resistance R5 of triode V1, the negative electrode of resistance R10 and diode D2, the base stage contact resistance R7 of triode V1, the other end of the other end contact resistance R8 of resistance R7, the anode of diode D4 and the collector electrode of triode V1, the grounded-emitter connection of triode V2, the negative electrode connecting valve S1 of diode D4 and the negative electrode of diode D3, the other end contact resistance R3 of resistance R5, resistance R4, the negative electrode of diode D1 and electric capacity C2, the other end of resistance R4 connects electric capacity C1, the pin 3 of resistance R6 and chip IC 1, the other end contact resistance R1 of resistance R3 and the pin 1 of chip IC 1, the other end of the pin 4 contact resistance R1 of chip IC 1 and resistance R2, the base stage of the other end connecting triode V2 of resistance R2, the anode contact resistance R6 of diode D3, the other end of resistance R9 connects electric capacity C3, the other end of electric capacity C3 connects the negative electrode of unidirectional thyristor Q1 and ground connection, the model of described chip IC 1 is LM321.

As preferred version of the present utility model: described motor M is AC motor.

Compared with prior art, the beneficial effects of the utility model are: the utility model energy-conservation ventilating fan automatic control electric line structure is simple, components and parts are few, the on state characteristic of triode and unidirectional thyristor is utilized to control the delay working of ventilating fan, and long-term work is also set but changes element, be applicable to different demands, simultaneously stand-by power consumption is low, therefore has the advantage of saving power, easy to use and diverse in function.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of energy-conservation ventilating fan automatic control circuit.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technological scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

Refer to Fig. 1, a kind of energy-conservation ventilating fan automatic control circuit, comprise rectifier bridge T, triode V1, resistance R8 and unidirectional thyristor Q1, the port one contact resistance R8 of described rectifier bridge T, resistance R9, the emitter of triode V1 and the anode of unidirectional thyristor Q1, the port 2 of rectifier bridge T connects motor M, the other end of electrode M connects 220V Ac, the port 4 of rectifier bridge T connects the other end of 220V Ac, the collector electrode contact resistance R5 of triode V1, the negative electrode of resistance R10 and diode D2, the base stage contact resistance R7 of triode V1, the other end of the other end contact resistance R8 of resistance R7, the anode of diode D4 and the collector electrode of triode V1, the grounded-emitter connection of triode V2, the negative electrode connecting valve S1 of diode D4 and the negative electrode of diode D3, the other end contact resistance R3 of resistance R5, resistance R4, the negative electrode of diode D1 and electric capacity C2, the other end of resistance R4 connects electric capacity C1, the pin 3 of resistance R6 and chip IC 1, the other end contact resistance R1 of resistance R3 and the pin 1 of chip IC 1, the other end of the pin 4 contact resistance R1 of chip IC 1 and resistance R2, the base stage of the other end connecting triode V2 of resistance R2, the anode contact resistance R6 of diode D3, the other end of resistance R9 connects electric capacity C3, the other end of electric capacity C3 connects the negative electrode of unidirectional thyristor Q1 and ground connection, the model of described chip IC 1 is LM321.

Motor M is AC motor.

Working principle of the present utility model is: at first, and due to the non-conducting of V1, V2, amplifier does not have working power, and thyristor Q1 does not have trigger signal yet, and ventilating fan does not rotate, the not power consumption of whole circuit.When needs start ventilating fan, the negative pole current potential of close switch S1, diode D4 is zero, and triode V1 forms base current by R7, D4, enters saturation state.By R5 current limliting, D1 voltage stabilizing, C2 filtering, produce the 12V working power that amplifier needs.Meanwhile, when the current potential of Vl collector electrode more than 20V time, D2 reverse breakdown, produced the trigger current of thyristor Q1 gate pole by R9, thyristor Q1 conducting, is equivalent to circuit ON, and ventilating fan M be energized, starts rotation.Due to now electric capacity C1 both end voltage be substantially the 2 pin current potentials of zero, amplifier IC1 lower than 3 pin, amplifier exports high level, by R2 for V2 provides base current, makes V2 enter saturation state, thus provides path for V1 base current.There is positive feedback resistor Rl between 3,4 pin due to amplifier IC1, make 3 pin current potentials higher, reach 10.8V, ensure that amplifier continues to export high level, maintain the state that ventilating fan rotates.Cut-off switch S1, V1 continue conducting, produce the 12V working power that amplifier needs, and to the trigger current of thyristor Q1 gate pole, make thyristor Q1 continue conducting, ventilating fan is rotated further.C1 obtains charging current through R4, and both end voltage constantly rises, and when the 2 pin current potentials of amplifier IC1 are higher than 3 pin, amplifier output low level, V2 enters cut-off state, and then V1 cut-off, and amplifier is lost the job power supply, and thyristor Q1 also ends, and ventilating fan stops operating.The time length that ventilating fan rotates, depends on the charging time constant of R4, C1.Value in figure probably can make ventilating fan rotate more than ten minute.So just complete a ventilating fan time-delay closing process.When needs start ventilating fan again, turn on-switch S1, now Cl is discharged rapidly by R6, D3, S1, and both end voltage almost reduces to zero, repeats again working procedure above.If desired ventilating fan works long hours (situation that such as super bath and ventilating fan are integrated), then switch S 1 closed for a long time, then ventilating fan just can work long hours.

Claims (2)

1. an energy-conservation ventilating fan automatic control circuit, comprise rectifier bridge T, triode V1, resistance R8 and unidirectional thyristor Q1, it is characterized in that, the port one contact resistance R8 of described rectifier bridge T, resistance R9, the emitter of triode V1 and the anode of unidirectional thyristor Q1, the port 2 of rectifier bridge T connects motor M, the other end of electrode M connects 220V Ac, the port 4 of rectifier bridge T connects the other end of 220V Ac, the collector electrode contact resistance R5 of triode V1, the negative electrode of resistance R10 and diode D2, the base stage contact resistance R7 of triode V1, the other end of the other end contact resistance R8 of resistance R7, the anode of diode D4 and the collector electrode of triode V1, the grounded-emitter connection of triode V2, the negative electrode connecting valve S1 of diode D4 and the negative electrode of diode D3, the other end contact resistance R3 of resistance R5, resistance R4, the negative electrode of diode D1 and electric capacity C2, the other end of resistance R4 connects electric capacity C1, the pin 3 of resistance R6 and chip IC 1, the other end contact resistance R1 of resistance R3 and the pin 1 of chip IC 1, the other end of the pin 4 contact resistance R1 of chip IC 1 and resistance R2, the base stage of the other end connecting triode V2 of resistance R2, the anode contact resistance R6 of diode D3, the other end of resistance R9 connects electric capacity C3, the other end of electric capacity C3 connects the negative electrode of unidirectional thyristor Q1 and ground connection, the model of described chip IC 1 is LM321.

2. the energy-conservation ventilating fan automatic control circuit of one according to claim 1, is characterized in that, described motor M is AC motor.