CN103512671A - Over-temperature alarming circuit and fan device equipped with the same - Google Patents
Over-temperature alarming circuit and fan device equipped with the same Download PDFInfo
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- CN103512671A CN103512671A CN201210209975.6A CN201210209975A CN103512671A CN 103512671 A CN103512671 A CN 103512671A CN 201210209975 A CN201210209975 A CN 201210209975A CN 103512671 A CN103512671 A CN 103512671A
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- electrically connected
- voltage
- alarm circuit
- overtemperature alarm
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Abstract
An over-temperature alarming circuit comprises an alarming unit, a temperature detection unit, a comparison unit, a rechargeable cell and a cell charging unit. The temperature detection unit is used for detecting changes of an ambient temperature and converting the ambient temperature into a corresponding voltage. The comparison unit is used for comparing a voltage output by the temperature detection unit with a standard voltage and correspondingly controlling whether the alarming unit alarms based on a comparison result. The rechargeable cell is used for providing power to the alarming unit, the temperature detection unit and the comparison unit. The cell charging unit is used for charging the rechargeable cell. The invention further relates to a fan device equipped with the over-temperature alarming circuit.
Description
Technical field
The fan assembly that the present invention relates to a kind of overtemperature alarm circuit and there is described overtemperature alarm circuit.
Background technology
Fan in computer is generally used for the electron devices such as central processing unit, internal memory is dispelled the heat.Yet fan may be when service time be long or other reason causes its rotating speed to slow down even stopping operating, the temperature in computer housing can raise rapidly, easily causes in computer housing other electronic devices and components because high temperature damages.
Summary of the invention
For the problems referred to above, be necessary to provide a kind of and can carry out to fan surrounding environment the overtemperature alarm circuit of monitoring temperature.
Separately, be also necessary to provide a kind of fan assembly with overtemperature alarm circuit.
A circuit, comprising:
Alarm unit;
Temperature detecting unit, for detection of the variation of environment temperature, and is converted to corresponding voltage by described environment temperature;
Comparing unit, is electrically connected to described alarm unit and described temperature detecting unit, and whether described comparing unit is compared with a normal voltage for the voltage that temperature detecting unit is exported, and report to the police according to the described warning circuit of the corresponding control of comparative result;
Rechargeable battery, for giving described alarm unit, temperature detecting unit and comparing unit power supply; And
Battery charging unit, is electrically connected to power supply to charge to described rechargeable battery.
, comprising fan connector, be electrically connected to the fan of described fan connector and above-mentioned overtemperature alarm circuit, the battery charging unit of described overtemperature alarm circuit is electrically connected to power supply by described fan connector.
Described overtemperature alarm circuit, by described temperature detecting unit, comparing unit and alarm unit, can, in environment temperature, as the fan too high alarm of environment temperature around, play suggesting effect to user.And, by rechargeable battery, power to described temperature detecting unit, comparing unit and alarm unit, can make overtemperature alarm circuit externally in the situation of power cut-off, can also work, improved the validity of overtemperature alarm circuit.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the thermal-shutdown circuit of better embodiment of the present invention.
Fig. 2 is the functional block diagram with the fan assembly of thermal-shutdown circuit shown in Fig. 1.
Main element symbol description
| Fan assembly | 100 |
| |
10 |
| |
11 |
| |
12 |
| |
13 |
| |
14 |
| |
15 |
| |
16 |
| |
17 |
| Voltage comparator | U1 |
| Triode | Q1 |
| Loudspeaker | BZ1 |
| Fly-wheel diode | D1 |
| Thermistor | R0 |
| Resistance | R1-R3 |
| Fan connector | 30 |
| Fan | 50 |
| The first operating voltage | V1 |
| The second operating voltage | V2 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1, the overtemperature alarm circuit 10 of better embodiment of the present invention comprises rechargeable battery 11, battery charging unit 12, boosting unit 13, pressure unit 14, temperature detecting unit 15, comparing unit 16 and alarm unit 17.
Boosting unit 13 is electrically connected to rechargeable battery 11, comparing unit 16 and alarm unit 17, and boosting unit 13 is the first operating voltage V1 for the output voltage of rechargeable battery 11 is raise, and exports comparing unit 16 and alarm unit 17 to.
In the present embodiment, the output voltage of rechargeable battery 11 is 3.7V, and the value of the first operating voltage V1 is 5V, and the value of the second operating voltage V2 is 2V.
Comparing unit 16, is electrically connected to temperature detecting unit 15 and alarm unit 17, and whether comparing unit 16 is compared with a normal voltage for the voltage that temperature detecting unit 15 is exported, and report to the police according to the corresponding control warning circuit 17 of comparative result.
Particularly, temperature detecting unit 15 comprises resistance R 1 and the thermistor R0 being connected serially to successively between pressure unit 14 and ground.Comparing unit 16 comprises voltage comparator U1, resistance R 2 and resistance R 3.Resistance R 2 and R3 are connected serially between pressure unit 14 and ground successively.The in-phase input end of voltage comparator U1 is electrically connected to the node between resistance R 2 and resistance R 3; Inverting input is electrically connected to the node between thermistor R0 and resistance R 1; Positive power source terminal is electrically connected to the output terminal of boosting unit 13; Negative power end ground connection; Output terminal is electrically connected to alarm unit 17.In the present embodiment, the type of alarm of alarm unit 17 is audible alarm.Alarm unit 17 comprises triode Q1, loudspeaker BZ1 and sustained diode 1.The base stage of triode Q1 is electrically connected to the output terminal of voltage comparator U1; Grounded emitter; Collector is electrically connected to the output terminal of boosting unit 13 by loudspeaker BZ1.The negative electrode of sustained diode 1 is electrically connected to the node between loudspeaker BZ1 and boosting unit 13; Anode is electrically connected to the node between loudspeaker BZ1 and the collector of triode Q1.
In the present embodiment, the thermistor that thermistor R0 is negative temperature coefficient, that is, the resistance of thermistor R0 reduces along with the rising of temperature.Under normal circumstances, the voltage of the inverting input of voltage comparator U1 is greater than the voltage of its in-phase input end, i.e. described normal voltage, and the output terminal output low level (logical zero) of voltage comparator U1 now, triode Q1 cut-off, loudspeaker BZ1 is sounding not.And when environment temperature raises, the resistance of thermistor R0 reduces, the lower voltage of the inverting input of voltage comparator U1, if environment temperature rises to the voltage that voltage that enough height make the inverting input of voltage comparator U1 is less than its in-phase input end, now voltage comparator U1 output high level drives triode Q1 conducting, makes loudspeaker BZ1 sounding alarm.Sustained diode 1 is for when triode Q1 ends, and the self-induction electromotive force that the inductive coil (not shown) in loudspeaker BZ1 is produced is carried out rapid discharge, prevents that the induction current that described self-induction coil produces from causing damaging to triode Q1.
Be appreciated that alarm unit 17 also can adopt the form of light to report to the police.As, loudspeaker BZ1 can replace with light emitting diode, and the anode of light emitting diode is electrically connected to the output terminal of boosting unit 13, and negative electrode is electrically connected to the collector of triode Q1.When triode Q1 conducting, the shinny warning of light emitting diode.Now, sustained diode 1 can be omitted.
Refer to Fig. 2, the overtemperature alarm circuit 10 of better embodiment of the present invention can be applicable in fan assembly 100.Described fan assembly 100 comprises described overtemperature alarm circuit 10, fan connector 30 and fan 50.Described fan 50 and overtemperature alarm circuit 10 are all electrically connected to the power supply in computer main board by fan connector 30, as+5V power supply or+12V power supply.When fan 50 normal rotation, the power supply that the battery charging unit 12 of overtemperature alarm circuit 10 is connected in computer main board by fan connector 30 charges to rechargeable battery 11.And when fan 50 rotating speeds decline or stop operating, if battery charging unit 12 cannot obtain electric energy by fan connector 30, can give temperature detecting unit 15, comparing unit 16 and alarm unit 17 power supplies by rechargeable battery 11, make overtemperature alarm circuit 10 can continue normal operation.
Described overtemperature alarm circuit 10, by described temperature detecting unit 15, comparing unit 16 and alarm unit 17, can, in environment temperature, as the fan 50 too high alarm of environment temperature around, play suggesting effect to user.And, by rechargeable battery 11, give described temperature detecting unit 15, comparing unit 16 and alarm unit 17 power supplies, can make overtemperature alarm circuit 10 externally in the situation of power cut-off, can also work, improved the validity of overtemperature alarm circuit 10.
Claims (10)
1. an overtemperature alarm circuit, comprising:
Alarm unit;
Temperature detecting unit, for detection of the variation of environment temperature, and is converted to corresponding voltage by described environment temperature;
Comparing unit, is electrically connected to described alarm unit and described temperature detecting unit, and whether described comparing unit is compared with a normal voltage for the voltage that temperature detecting unit is exported, and report to the police according to the described warning circuit of the corresponding control of comparative result;
Rechargeable battery, for giving described alarm unit, temperature detecting unit and comparing unit power supply; And
Battery charging unit, is electrically connected to power supply to charge to described rechargeable battery.
2. overtemperature alarm circuit as claimed in claim 1, it is characterized in that: described overtemperature alarm circuit also comprises boosting unit, described boosting unit is electrically connected to described rechargeable battery, comparing unit and alarm unit, described boosting unit is the first operating voltage for the output voltage of described rechargeable battery is raise, and exports described comparing unit and alarm unit to.
3. overtemperature alarm circuit as claimed in claim 2, it is characterized in that: described overtemperature alarm circuit also comprises pressure unit, described pressure unit is electrically connected to described rechargeable battery, temperature detecting unit and comparing unit, described pressure unit is used for the output voltage of described rechargeable battery to be reduced to the second operating voltage, and exports described temperature detecting unit and comparing unit to.
4. overtemperature alarm circuit as claimed in claim 3, is characterized in that: described pressure unit is a low pressure difference linear voltage regulator.
5. overtemperature alarm circuit as claimed in claim 3, is characterized in that: the output voltage of described rechargeable battery is 3.7V, and the value of described the first operating voltage is 5V, and the value of described the second operating voltage is 2V.
6. overtemperature alarm circuit as claimed in claim 3, it is characterized in that: described temperature detecting unit is connected serially to the first resistance and the thermistor between described pressure unit and ground successively, described comparing unit comprises voltage comparator and is connected serially to successively the second resistance and the 3rd resistance between described pressure unit and ground, and the in-phase input end of described voltage comparator is electrically connected to the node between described the second resistance and the 3rd resistance; Inverting input is electrically connected to the node between described thermistor and the first resistance; Positive power source terminal is electrically connected to the output terminal of described boosting unit; Negative supply ground connection; The output terminal of described voltage comparator is electrically connected to described alarm unit.
7. overtemperature alarm circuit as claimed in claim 6, is characterized in that: described alarm unit comprises triode and loudspeaker, and the base stage of described triode is electrically connected to the output terminal of described voltage comparator; Grounded emitter; Collector is electrically connected to the output terminal of described boosting unit by loudspeaker.
8. overtemperature alarm circuit as claimed in claim 7, is characterized in that: described alarm unit also comprises fly-wheel diode, and the negative electrode of described fly-wheel diode is electrically connected to the node between described loudspeaker and described boosting unit; Anode is electrically connected to the node between described loudspeaker and the collector of described triode.
9. overtemperature alarm circuit as claimed in claim 6, is characterized in that: alarm unit comprises triode and light emitting diode, and the base stage of described triode is electrically connected to the output terminal of described voltage comparator; Grounded emitter; Collector is electrically connected to the negative electrode of described light emitting diode; The anode of described light emitting diode is electrically connected to the output terminal of described boosting unit.
10. a fan assembly, comprise fan connector and be electrically connected to the fan of described fan connector, it is characterized in that: described fan assembly also comprises the overtemperature alarm circuit as described in claim 1 to 9 any one, and the battery charging unit of described overtemperature alarm circuit is electrically connected to power supply by described fan connector.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210209975.6A CN103512671A (en) | 2012-06-25 | 2012-06-25 | Over-temperature alarming circuit and fan device equipped with the same |
| TW101125032A TW201401234A (en) | 2012-06-25 | 2012-07-12 | Over-temperature alarm circuit and fan apparatus having the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210209975.6A CN103512671A (en) | 2012-06-25 | 2012-06-25 | Over-temperature alarming circuit and fan device equipped with the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103512671A true CN103512671A (en) | 2014-01-15 |
Family
ID=49895753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210209975.6A Pending CN103512671A (en) | 2012-06-25 | 2012-06-25 | Over-temperature alarming circuit and fan device equipped with the same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103512671A (en) |
| TW (1) | TW201401234A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397413A (en) * | 2018-03-12 | 2018-08-14 | 珠海里田文化有限公司 | A kind of wireless system for transmitting data of intelligent art product |
| CN110635180A (en) * | 2019-08-01 | 2019-12-31 | 国网浙江省电力有限公司丽水供电公司 | A battery charging and discharging troubleshooting device |
| CN112859965A (en) * | 2021-01-18 | 2021-05-28 | 深圳市道通智能航空技术股份有限公司 | Temperature control circuit and electronic equipment |
-
2012
- 2012-06-25 CN CN201210209975.6A patent/CN103512671A/en active Pending
- 2012-07-12 TW TW101125032A patent/TW201401234A/en unknown
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397413A (en) * | 2018-03-12 | 2018-08-14 | 珠海里田文化有限公司 | A kind of wireless system for transmitting data of intelligent art product |
| CN110635180A (en) * | 2019-08-01 | 2019-12-31 | 国网浙江省电力有限公司丽水供电公司 | A battery charging and discharging troubleshooting device |
| CN110635180B (en) * | 2019-08-01 | 2022-06-28 | 国网浙江省电力有限公司丽水供电公司 | A battery charging and discharging troubleshooting device |
| CN112859965A (en) * | 2021-01-18 | 2021-05-28 | 深圳市道通智能航空技术股份有限公司 | Temperature control circuit and electronic equipment |
| CN112859965B (en) * | 2021-01-18 | 2022-08-26 | 深圳市道通智能航空技术股份有限公司 | Temperature control circuit and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201401234A (en) | 2014-01-01 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140115 |