CN204716581U - A kind of fan stall observation circuit - Google Patents
A kind of fan stall observation circuit Download PDFInfo
- Publication number
- CN204716581U CN204716581U CN201520261508.7U CN201520261508U CN204716581U CN 204716581 U CN204716581 U CN 204716581U CN 201520261508 U CN201520261508 U CN 201520261508U CN 204716581 U CN204716581 U CN 204716581U
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- resistance
- pin
- fan
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- stall
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Abstract
The utility model discloses a kind of fan stall observation circuit, comprise resistance R1, diode D1, triode V1 and buzzer B, the other end of the negative electrode of one end contact resistance R2, the resistance R3 of described resistance R1, resistance R4, resistance R5, diode D1, the pin 1 of Hall transducer A, the pin 8 of chip IC 1 and power supply VCC, resistance R1 connects the pin 2 of electric capacity C1 and Hall transducer A.The utility model fan stall observation circuit adopts Hall transducer collecting device fan inside rotary speed information, and convert pulse signal to and carry out Real-Time Monitoring, once occur that rotation speed of the fan reduces excessive or stall and will start buzzer and send chimes of doom and remind user to check fan situation, avoid the loss because fan stall causes, circuit is simple simultaneously, components and parts are few, easy to use.
Description
Technical field
The utility model relates to a kind of observation circuit, specifically a kind of fan stall observation circuit.
Background technique
Fan is the instrument of the essential heat radiation of a lot of consumer, modal is refrigerator, air-conditioning and computer, this kind equipment operationally can produce a large amount of heats, can not get heat radiation for a long time and can cause working efficiency reduction, component aging aggravation, even instrument burns, therefore the normal work of fan seems extremely important, but the radiation fan of this kind equipment major part is at device interior, quit work even if break down, user is also difficult to notice, thus cause economic loss, and delay normal work.
Model utility content
The purpose of this utility model is the fan stall observation circuit providing a kind of structure simple, practical, 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 fan stall observation circuit, comprise resistance R1, diode D1, triode V1 and buzzer B, one end contact resistance R2 of described resistance R1, resistance R3, resistance R4, resistance R5, the negative electrode of diode D1, the pin 1 of Hall transducer A, the pin 8 of chip IC 1 and power supply VCC, the other end of resistance R1 connects the pin 2 of electric capacity C1 and Hall transducer A, the other end of the other end contact resistance R2 of electric capacity C1 and resistance R6, the base stage of the other end connecting triode V1 of resistance R6, the other end of the emitter contact resistance R3 of triode V1, the pin 3 of electric capacity C2 and chip IC 1, the collector electrode contact resistance R7 of triode V1, the other end of electric capacity C2, the anode of diode D2, the pin 3 of Hall transducer A and the pin 1 of chip IC 1 also ground connection, the other end of the other end contact resistance R7 of resistance R4 and the pin 2 of chip IC 1, the pin 7 of chip IC 1 connects the negative electrode of buzzer B and diode D2, the other end of the other end contact resistance R5 of buzzer B.
As preferred version of the present utility model: the model of described chip IC 1 is LM311.
As preferred version of the present utility model: described power supply VCC is 12V direct current.
Compared with prior art, the beneficial effects of the utility model are: the utility model fan stall observation circuit adopts Hall transducer collecting device fan inside rotary speed information, and convert pulse signal to and carry out Real-Time Monitoring, once occur that rotation speed of the fan reduces excessive or stall and will start buzzer and send chimes of doom and remind user to check fan situation, avoid the loss because fan stall causes, circuit is simple simultaneously, components and parts are few, easy to use.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of fan stall observation 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 fan stall observation circuit, comprise resistance R1, diode D1, triode V1 and buzzer B, one end contact resistance R2 of described resistance R1, resistance R3, resistance R4, resistance R5, the negative electrode of diode D1, the pin 1 of Hall transducer A, the pin 8 of chip IC 1 and power supply VCC, the other end of resistance R1 connects the pin 2 of electric capacity C1 and Hall transducer A, the other end of the other end contact resistance R2 of electric capacity C1 and resistance R6, the base stage of the other end connecting triode V1 of resistance R6, the other end of the emitter contact resistance R3 of triode V1, the pin 3 of electric capacity C2 and chip IC 1, the collector electrode contact resistance R7 of triode V1, the other end of electric capacity C2, the anode of diode D2, the pin 3 of Hall transducer A and the pin 1 of chip IC 1 also ground connection, the other end of the other end contact resistance R7 of resistance R4 and the pin 2 of chip IC 1, the pin 7 of chip IC 1 connects the negative electrode of buzzer B and diode D2, the other end of the other end contact resistance R5 of buzzer B.
The model of chip IC 1 is LM311.
Power supply VCC is 12V direct current.
Working principle of the present utility model is: power supply VCC after resistance R4, resistance R7 dividing potential drop for 2 pin of comparator IC1 provide the voltage of 0.773V.Hall transducer A is for gathering fan rotating speed signals and converting pulse signal to, and when electric fan normally works, Hall transducer A is to the square-wave pulse of circuit input end input certain frequency.Electric fan often circles output two pulses.When low pulse arrives, electric capacity C2 charges to electric capacity C1 through triode V1 and resistance R6, triode V1 conducting, fast the charge discharging resisting of electric capacity C2 is fallen, the voltage of the pin 2 of comparator IC1 is lower than the voltage of pin 1, then the pin 7 of comparator IC1 exports high level, and buzzer B does not cry.Power supply VCC charges to electric capacity C1 through resistance R2 simultaneously, and V1 ends very soon, and VCC starts slowly to charge to electric capacity C2 through resistance R3; When electric fan jump pulse upper to circuit input, electric capacity C1 discharges through diode D1, resistance R1, simultaneously V1 remain off state, and resistance R3 continues slowly to charge to electric capacity C2; When the low pulse of the next one arrives, V1 is conducting again, is released fast by the electric charge on C2 again, and circuit repeats above process.If electric fan stall, what Hall transducer A inputted to circuit is permanent High level, after V1 cut-off, through the time lag of short time, pin 3 voltage of comparator IC1 is higher than the voltage of pin 2, comparator output low level, VCC powers to buzzer B through resistance R5, buzzer B continue toot cry, carry out stall alarm, circuit adopts Hall transducer collecting device fan inside rotary speed information, and convert pulse signal to and carry out Real-Time Monitoring, once occur that rotation speed of the fan reduces excessive or stall and will start buzzer and send chimes of doom and remind user to check fan situation, avoid the loss because fan stall causes, circuit is simple simultaneously, components and parts are few, easy to use.
Claims (2)
1. a fan stall observation circuit, comprises resistance R1, diode D1, triode V1 and buzzer B, it is characterized in that, one end contact resistance R2 of described resistance R1, resistance R3, resistance R4, resistance R5, the negative electrode of diode D1, the pin 1 of Hall transducer A, the pin 8 of chip IC 1 and power supply VCC, the other end of resistance R1 connects the pin 2 of electric capacity C1 and Hall transducer A, the other end of the other end contact resistance R2 of electric capacity C1 and resistance R6, the base stage of the other end connecting triode V1 of resistance R6, the other end of the emitter contact resistance R3 of triode V1, the pin 3 of electric capacity C2 and chip IC 1, the collector electrode contact resistance R7 of triode V1, the other end of electric capacity C2, the anode of diode D2, the pin 3 of Hall transducer A and the pin 1 of chip IC 1 also ground connection, the other end of the other end contact resistance R7 of resistance R4 and the pin 2 of chip IC 1, the pin 7 of chip IC 1 connects the negative electrode of buzzer B and diode D2, the other end of the other end contact resistance R5 of buzzer B, the model of described chip IC 1 is LM311.
2. a kind of fan stall observation circuit according to claim 1, it is characterized in that, described power supply VCC is 12V direct current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520261508.7U CN204716581U (en) | 2015-04-27 | 2015-04-27 | A kind of fan stall observation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520261508.7U CN204716581U (en) | 2015-04-27 | 2015-04-27 | A kind of fan stall observation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204716581U true CN204716581U (en) | 2015-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520261508.7U Expired - Fee Related CN204716581U (en) | 2015-04-27 | 2015-04-27 | A kind of fan stall observation circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204716581U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173455A (en) * | 2019-06-27 | 2019-08-27 | 徐州工业职业技术学院 | A kind of projector multi-function protector |
-
2015
- 2015-04-27 CN CN201520261508.7U patent/CN204716581U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173455A (en) * | 2019-06-27 | 2019-08-27 | 徐州工业职业技术学院 | A kind of projector multi-function protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151021 Termination date: 20160427 |