CN212003683U - Automatic control circuit of exhaust fan - Google Patents
Automatic control circuit of exhaust fan Download PDFInfo
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- CN212003683U CN212003683U CN202020472911.5U CN202020472911U CN212003683U CN 212003683 U CN212003683 U CN 212003683U CN 202020472911 U CN202020472911 U CN 202020472911U CN 212003683 U CN212003683 U CN 212003683U
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Abstract
The utility model discloses an automatic control circuit of an exhaust fan, which has simple structure and easy realization, and the arrangement of bidirectional thyristors is convenient for the soft on-off control of a loop among an alternating current input interface, an alternating current exhaust fan, a full-wave rectification module and the bidirectional thyristors; the arrangement of the full-wave rectification module and the arrangement of the bidirectional controllable silicon connected in parallel between the positive output end and the negative output end of the full-wave rectification module are convenient for alternating current to flow in from the same end of the bidirectional controllable silicon and flow out from the other end of the bidirectional controllable silicon when in work, so that the voltage directions at the two ends of the bidirectional controllable silicon are not changed; the driving module is arranged to drive the on-off of the bidirectional controllable silicon conveniently; the setting of human infrared induction module of PIR is convenient for come the break-make of control bidirectional thyristor through the result of human infrared induction of PIR to realize the automatic control of opening and closing to exchanging exhaust fan, the practicality is good.
Description
Technical Field
The utility model relates to an automatic control circuit of air discharge fan.
Background
The exhaust fan used in kitchen and toilet mainly has two control modes of pull wire or button, and has the defects of inconvenience, easy forgetting to turn off after use and waste of electric energy.
Therefore, how to overcome the above-mentioned drawbacks has become an important issue to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes above-mentioned technique is not enough, provides an automatic control circuit of air discharge fan.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an automatic control circuit of air discharge fan, is including alternating current input interface 1, exchange exhaust fan 2, full wave rectification module 3, bidirectional thyristor 4, the human infrared induction module of PIR 5, be used for right the human infrared induction module of PIR 5 carries out the DC power supply module 6 of supplying power, and receives the control of the human infrared induction module of PIR 5 is used for driving drive module 7 of the break-make of bidirectional thyristor 4, it is in to exchange exhaust fan 2 series connection alternating current input interface 1's a link with between full wave rectification module 3's an input, another link of alternating current input interface 1 with another input of full wave rectification module 3 is connected, bidirectional thyristor 4 connects in parallel between full wave rectification module 3's the positive and negative voltage output.
According to the automatic control circuit of the exhaust fan, the PIR human body infrared sensing module 5 adopts a PIR control chip with the model number of AS092A-SD1, and when the chip is powered on, the control signal output end outputs a high level for a period of time and then outputs a low level; the driving module 7 comprises a diode D5, a diode D7, a diode D8, a resistor R7, a resistor R8, a resistor R10, a resistor R11, a resistor R12, a resistor R14, a resistor R15, a voltage regulator tube D15, and a unidirectional silicon Q15, wherein the cathode of the diode D15 is connected with one end of the resistor R15, the cathode of the voltage regulator tube D15, the anode voltage output end of the direct-current power module 6, the other end of the resistor R15 is connected with the cathode of the diode D15, the anode of the diode D15 is connected with the anode connecting end of the unidirectional silicon Q15 and a main electrode of the bidirectional thyristor 4 through the resistor R15, the anode of the diode D15 is connected with one end of the resistor R15, the cathode of the voltage regulator tube D15, one end of the resistor R15 and the gate control terminal of the bidirectional thyristor R364, the other end of the resistor R15 is connected with the other end of the resistor R14, the other end of the resistor R12, the other end of the resistor R7 and the other main electrode of the bidirectional controllable silicon 4, a control gate of the unidirectional silicon Q2 is connected with the cathode of the diode D8 through the resistor R8, and the anode of the diode D8 is connected with a control signal output end of the PIR control chip.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the structure of the scheme is simple and easy to realize, and the arrangement of the bidirectional controllable silicon is convenient for the soft on-off control of a loop among the alternating current input interface, the alternating current exhaust fan, the full-wave rectification module and the bidirectional controllable silicon; the full-wave rectification module and the bidirectional controllable silicon are connected in parallel between the positive output end and the negative output end of the full-wave rectification module, so that alternating current flows in from the same end of the bidirectional controllable silicon and flows out from the other end of the bidirectional controllable silicon when the bidirectional controllable silicon works, and the voltage directions at the two ends of the bidirectional controllable silicon are not changed; the driving module is arranged to facilitate the on-off of the bidirectional controllable silicon; the setting of human infrared induction module of PIR is convenient for come the break-make of control bidirectional thyristor through the result of human infrared induction of PIR to realize the automatic control of opening and closing to exchanging exhaust fan, the practicality is good.
2. When the circuit is powered on, the control signal output end of the PIR control chip of the AS092A-SD1 outputs a high level for a period of time, then outputs a low level, and the drive module drives the bidirectional thyristor to be conducted for a period of time and then is disconnected, so that the exhaust fan is started to work for a period of time, and if the fact that a person walks is not sensed, the exhaust fan stops working, a user can conveniently know whether the circuit performance is normal, and the practicability is good; when the PIR human body infrared sensing module senses that a person walks, the PIR control chip outputs a high level for a period of time, and the exhaust fan stops after working for a period of time; if it is always sensed that someone is walking, the PIR control chip outputs high level all the time, the exhaust fan works all the time, and the exhaust fan meets the actual requirement and is convenient to use.
Drawings
FIG. 1 is a circuit diagram of the present case
Detailed Description
The features of the present invention and other related features are described in further detail below by way of examples to facilitate understanding by those skilled in the art:
as shown in fig. 1, an automatic control circuit of an exhaust fan comprises an alternating current input interface 1, an alternating current exhaust fan 2, a full-wave rectification module 3, a bidirectional thyristor 4, a PIR human infrared induction module 5, a direct current power supply module 6 for supplying power to the PIR human infrared induction module 5, and a driving module 7 controlled by the PIR human infrared induction module 5 and used for driving the bidirectional thyristor 4 to be switched on and off, wherein the alternating current exhaust fan 2 is connected in series between a connection end of the alternating current input interface 1 and an input end of the full-wave rectification module 3, another connection end of the alternating current input interface 1 is connected with another input end of the full-wave rectification module 3, and the bidirectional thyristor 4 is connected in parallel between a positive voltage output end and a negative voltage output end of the full-wave rectification module 3.
As mentioned above, the structure of the scheme is simple and easy to realize, and the arrangement of the bidirectional controllable silicon 4 is convenient for the soft on-off control of the loop among the alternating current input interface 1, the alternating current exhaust fan 2, the full-wave rectification module 3 and the bidirectional controllable silicon 4; the arrangement of the full-wave rectification module 3 and the arrangement of the bidirectional controllable silicon 4 which is connected in parallel between the positive output end and the negative output end of the full-wave rectification module 3 are convenient for alternating current to flow in from the same end of the bidirectional controllable silicon 4 and flow out from the other end of the bidirectional controllable silicon 4 during working, so that the voltage directions at the two ends of the bidirectional controllable silicon 4 are not changed; the driving module 7 is arranged to facilitate the on-off of the bidirectional controllable silicon 4; the setting of human infrared induction module 5 of PIR is convenient for come the break-make of control bidirectional thyristor 4 through the result of human infrared induction of PIR to realize the automatic control of opening and closing to exchanging exhaust fan 2, the practicality is good.
AS described above, in the specific implementation, the PIR human body infrared sensing module 5 adopts a PIR control chip with model AS092A-SD1, and when the chip is powered on, the control signal output end outputs a high level for a period of time and then outputs a low level; the driving module 7 comprises a diode D5, a diode D7, a diode D8, a resistor R7, a resistor R8, a resistor R10, a resistor R11, a resistor R12, a resistor R14, a resistor R15, a voltage regulator tube D15, and a unidirectional silicon Q15, wherein the cathode of the diode D15 is connected with one end of the resistor R15, the cathode of the voltage regulator tube D15, the anode voltage output end of the direct-current power module 6, the other end of the resistor R15 is connected with the cathode of the diode D15, the anode of the diode D15 is connected with the anode connecting end of the unidirectional silicon Q15 and a main electrode of the bidirectional thyristor 4 through the resistor R15, the anode of the diode D15 is connected with one end of the resistor R15, the cathode of the voltage regulator tube D15, one end of the resistor R15 and the gate control terminal of the bidirectional thyristor R364, the other end of the resistor R15 is connected with the other end of the resistor R14, the other end of the resistor R12, the other end of the resistor R7 and the other main electrode of the bidirectional controllable silicon 4, a control gate of the unidirectional silicon Q2 is connected with the cathode of the diode D8 through the resistor R8, and the anode of the diode D8 is connected with a control signal output end of the PIR control chip.
AS described above, when the circuit of the present application is powered on, the control signal output end of the PIR control chip of the AS092A-SD1 outputs a high level for a period of time, and then outputs a low level, and the drive module 7 drives the bidirectional thyristor 4 to be turned on for a period of time and then turned off, so that the exhaust fan is started to work for a period of time first, and if no person is sensed to walk, the exhaust fan stops working, so that a user can know whether the circuit performance is normal, and the circuit has good practicability; when the PIR human body infrared sensing module 5 senses that a person walks, the PIR control chip outputs a high level for a period of time, and the exhaust fan stops after working for a period of time; if it is always sensed that someone is walking, the PIR control chip outputs high level all the time, the exhaust fan works all the time, and the exhaust fan meets the actual requirement and is convenient to use.
As described above, the present disclosure is directed to an automatic control circuit for an exhaust fan, and all technical solutions identical or similar to the present disclosure should be considered as falling within the scope of the present disclosure.
Claims (2)
1. An automatic control circuit of an exhaust fan is characterized by comprising an alternating current input interface (1), an alternating current exhaust fan (2), a full-wave rectification module (3), a bidirectional controllable silicon (4), a PIR human body infrared induction module (5), a direct current power supply module (6) for supplying power to the PIR human body infrared induction module (5), and a driving module (7) which is controlled by the PIR human body infrared induction module (5) and is used for driving the bidirectional controllable silicon (4) to be switched on and off, the alternating current exhaust fan (2) is connected in series between one connection end of the alternating current input interface (1) and one input end of the full-wave rectification module (3), the other connecting end of the alternating current input interface (1) is connected with the other input end of the full wave rectification module (3), the bidirectional controllable silicon (4) is connected in parallel between the positive voltage output end and the negative voltage output end of the full-wave rectification module (3).
2. The automatic control circuit of an exhaust fan according to claim 1, characterized in that the PIR human infrared sensing module (5) adopts a PIR control chip with model AS092A-SD1, and when the chip is powered on, the control signal output end outputs a high level for a period of time and then outputs a low level; the driving module (7) comprises a diode D5, a diode D7, a diode D8, a resistor R7, a resistor R8, a resistor R10, a resistor R11, a resistor R12, a resistor R14, a resistor R15, a voltage regulator tube D15 and a unidirectional silicon Q15, wherein the cathode of the diode D15 is connected with one end of the resistor R15, the cathode of the voltage regulator tube D15 and the anode voltage output end of the direct current power supply module (6), the other end of the resistor R15 is connected with the cathode of the diode D15, the anode of the diode D15 is connected with the anode connecting end of the unidirectional silicon Q15 and a main electrode of the bidirectional thyristor (4) through the resistor R15, the anode of the diode D15 is connected with one end of the voltage regulator tube D15, the cathode connecting end of the resistor R15 and one end of the voltage regulator tube R15, and the anode connecting end of the voltage regulator tube D15 are connected with one end of the voltage regulator tube R15, The control gate pole of bidirectional thyristor (4) is connected, the resistance R15 other end with the resistance R14 other end, the resistance R12 other end, the resistance R7 other end, another main electrode of bidirectional thyristor (4) are connected, unidirectional silicon Q2's control gate pole pass through resistance R8 with diode D8 negative pole is connected, diode D8 positive pole with the control signal output of PIR control chip is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020472911.5U CN212003683U (en) | 2020-04-02 | 2020-04-02 | Automatic control circuit of exhaust fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020472911.5U CN212003683U (en) | 2020-04-02 | 2020-04-02 | Automatic control circuit of exhaust fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212003683U true CN212003683U (en) | 2020-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020472911.5U Active CN212003683U (en) | 2020-04-02 | 2020-04-02 | Automatic control circuit of exhaust fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212003683U (en) |
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2020
- 2020-04-02 CN CN202020472911.5U patent/CN212003683U/en active Active
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