CN1978915A - Fan system and temperature feel protection device - Google Patents
Fan system and temperature feel protection device Download PDFInfo
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- CN1978915A CN1978915A CN 200510125900 CN200510125900A CN1978915A CN 1978915 A CN1978915 A CN 1978915A CN 200510125900 CN200510125900 CN 200510125900 CN 200510125900 A CN200510125900 A CN 200510125900A CN 1978915 A CN1978915 A CN 1978915A
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- module
- electrically connected
- switching element
- temperature
- input end
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- Control Of Positive-Displacement Air Blowers (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The invention relates to fan system. It includes fan module, starting module, temperature sensing component, and control module. The starting module is electrical connection with the fan module, used to start it. The temperature sensing component produces the corresponding sense signal according to the environment. The control module receives the sense signal, and controls the start module to close the fan module while environment temperature is higher than the first temperature or lower than the second one.
Description
Technical field
The present invention relates to a kind of fan system and temperature feel protection device thereof, particularly relate to a kind of blower module and temperature feel protection device thereof with temp-sensing element.
Background technique
Generally speaking, electronics all has fan system, can maintain normal operating temperature to guarantee electronics, but make the electronics normal operation.And fan system itself also has specific use specification, for example the operating temperature of fan system (operating temperature).
As shown in Figure 1, a kind of existing fan system 1 mainly comprises blower module 11 and starts module 12.Wherein, starting module 12 dispels the heat in order to start blower module 11.But, when the operating temperature of fan system 1 is too high or too low, can cause fan system 1 to damage.At this problem, prior art adopts the operating temperature of analog control chip 13 with sensing fan system 1 usually, when sensing operating temperature when too high or too low, then stops fan system 1 running automatically, to reach the effect of protection.
But analog control chip 13 costs an arm and a leg, so existing fan system 1 integral production cost is too high.In addition, analog control chip 13 also can't reach the effect of soft start (soft-start).
Therefore, the invention provides a kind of fan system and temperature feel protection device thereof, to improve above-mentioned problem.
Summary of the invention
In view of the above problems, the purpose of this invention is to provide a kind of fan system and temperature feel protection device thereof, measure operating temperature by temp-sensing element and be in when too high or too low, promptly stop the fan system running, to reach the purpose of protection.
Therefore, for reaching above-mentioned purpose, fan system according to the present invention comprises blower module, starts module, temp-sensing element and control module.Wherein, start module and be electrically connected with blower module, and in order to start blower module; Temp-sensing element produces corresponding sensing signal according to ambient temperature; Control module receives sensing signal, and control starts module according to sensing signal, and when ambient temperature was higher than first temperature or is lower than second temperature, control started module to close blower module.
For reaching above-mentioned purpose, temperature feel protection device according to the present invention matches with blower module, and temperature feel protection device comprises startup module, temp-sensing element and control module.Wherein, start module system and be electrically connected with blower module, and in order to start blower module; Temp-sensing element produces corresponding sensing signal according to ambient temperature; Control module receives sensing signal, and control starts module according to sensing signal, and when ambient temperature was higher than first temperature or is lower than second temperature, control started module to close blower module.
In sum, according to fan system of the present invention and temperature feel protection device thereof, be to be in when too high or too low by measure operating temperature when temp-sensing element, close blower module to reach the effect of protection.Compared with prior art, fan system of the present invention and temperature feel protection device thereof utilize temp-sensing element sensing operating temperature, and be normal to guarantee the fan system running, and can replace analog control chip, to reduce the integral production cost.
Description of drawings
Fig. 1 is a kind of schematic representation of existing fan system;
Fig. 2 is the schematic representation of a kind of fan system of the preferred embodiment of the present invention; And
Fig. 3 is the circuit diagram of a kind of fan system of the preferred embodiment of the present invention.
The component symbol explanation:
1-fan system 11-blower module
12-starts the analog control chip of module 13-
2-fan system 21-blower module
22-starts module 23-control module
The 231-first control unit 232-second control unit
24-temp-sensing element V
t-sensing signal
Q
1-the first switching element Q
2-second switch element
Q
3-Di three switching element Q
4-Di four switching elements
U
1-the first comparator U
2-the second comparator
V
Refl-the first reference signal V
Ref2-the second reference signal
Input
1-first input end input
2-the second input end
Output-output terminal R
1～R
3-resistor
D
1, D
2-diode C-capacitor
S-source electrode G-grid
The D-drain electrode
Embodiment
Hereinafter with reference to relevant indicators, a kind of according to the preferred embodiment of the invention fan system and temperature feel protection device thereof are described.
Figure 2 shows that the schematic representation of a kind of fan system of the preferred embodiment of the present invention.Fan system 2 can be applicable to electronics (not shown) inside, with as heat transmission.
Fan system 2 comprises blower module 21, starts module 22, control module 23 and temp-sensing element 24.Wherein, blower module 21 has fan, also can dispose a plurality of fans at blower module 21 places respectively according to radiating requirements, in order to strengthen radiating effect.
Wherein, start module 22 and be electrically connected with blower module 21, and in order to start blower module 21.Temp-sensing element 24 produces corresponding sensing signal V according to ambient temperature
t, temp-sensing element 24 can be a thermistor, in the present embodiment, temp-sensing element 24 is negative tempperature coefficient thermistors.Ambient temperature can be the inside temperature of electronics, and temp-sensing element 24 produces corresponding sensing signal V according to ambient temperature
t(can be a magnitude of voltage).Because therefore the negative tempperature coefficient thermistor self character, when the electronics inside temperature improves, will make the resistance of temp-sensing element 24 diminish, therefore, sensing signal V
tMagnitude of voltage also descend thereupon; Otherwise when the electronics interior environment temperature reduced, it is big that the resistance of temp-sensing element 24 becomes, therefore, and sensing signal V
tMagnitude of voltage also rise thereupon.
Control module 23 receives sensing signal V
t, and according to sensing signal V
tControl starts module 22, and when ambient temperature was higher than first temperature or is lower than second temperature, control module 23 controls started module 22 and close blower module 21, operate under subnormal temperature to prevent blower module 21, and cause fan system 2 to damage.In the present embodiment, first temperature and second temperature are decided according to fan system 2 use specifications own, and first temperature is the upper limit working temperature of fan system 2, second temperature is the lower limit operating temperature of fan system 2, for example, first temperature is 70 ℃, and second temperature is-40 ℃.
In addition, as shown in Figure 3, control module 23 comprises first control unit 231 and second control unit 232.Wherein, first control unit 231 comprises the first switching element Q
1With the first comparator U
1, second control unit 232 comprises second switch element Q
2With the second comparator U
2
The first switching element Q
1With second switch element Q
2Can be that transistor or other have the electronic component of switch effect, in the present embodiment, the first switching element Q
1With second switch element Q
2It is nmos pass transistor.
With regard to first control unit 231, the first switching element Q
1Drain D is electrically connected with starting module 22, in order to control startup module 22, the first switching element Q
1Source S ground connection.
The first comparator U
1Has first input end input
1, the second input end input
2And output terminal output.In the present embodiment, first input end input
1Be normal phase input end, the second input end input
2It is inverting input.
First input end input
1Receive the first reference signal V
Ref1, it can produce by the bleeder circuit be made up of at least two resistors, and selects the resistor of different resistances for use according to user's demand, to adjust the first reference signal V
Ref1Size, herein, the first reference signal V
Ref1In order to judge the upper limit working temperature of fan system 2, the second input end input
2Receive sensing signal V
t, the output terminal output and the first switching element Q
1Grid G be electrically connected, to control the first switching element Q
1For convenience of description, suppose the first comparator U
1Voltage gain be 1, as sensing signal V
tBe lower than the first reference signal V
Ref1The time, output terminal output exports a positive voltage, makes the first switching element Q
1Open, start module 22 with control and close blower module 21.
In addition, the first comparator U of present embodiment
1The second input end input
2With output terminal output respectively with resistor R
1Be electrically connected, make the comparator U that wins
1Has accurate temperature turnover characteristic.Illustrate, first control unit 231 should be 70 when spending in first temperature, promptly need control to start module 22 to close blower module 21, but because the relation (has error electronic component) of electronic component self character itself, and make the temperature of winning is 72 when spending, and just control starts module 22 to close blower module 21.In order to prevent above-mentioned situation, the first comparator U
1The second input end input
2And between the output terminal output resistor R is set
1As voltage back coupling compensation, the therefore first comparator U
1When 70 spend, can precisely control startup module 22 and close blower module 21, to reach effect with accurate temperature turnover characteristic.
With regard to second control unit 232, second switch element Q
2Drain D is electrically connected with starting module 22, in order to control startup module 22, second switch element Q
2Source S ground connection.
The second comparator U
2Has first input end input
1, the second input end input
2And output terminal output.In the present embodiment, first input end input
1Be normal phase input end, the second input end input
2It is inverting input.
First input end input
1Receive sensing signal V
t, the second input end input
2Receive the second reference signal V
Ref2, it can produce by the bleeder circuit be made up of at least two resistors, and selects the resistor of different resistances for use according to user's demand, to adjust the second reference signal V
Ref2Size, herein, the second reference signal V
Ref2In order to judge the lower limit operating temperature of fan system 2.Output terminal output and second switch element Q
2Grid G be electrically connected, with control second switch element Q
2For convenience of description, suppose the second comparator U
2Voltage gain be 1, as sensing signal V
tBe higher than the second reference signal V
Ref2The time, output terminal output exports a positive voltage, makes second switch element Q
2Open, start module 22 with control and close blower module 21, in addition, first input end input
1With output terminal output respectively with resistor R
2Be electrically connected, the operation principles of resistor R 2 is with above-mentioned resistor R
1The same, so that the second comparator U
2The effect that can have accurate temperature turnover characteristic.
In sum, as can be known, as sensing signal V
tBe lower than the first reference signal V
Ref1Or be higher than the second reference signal V
Ref2The time, the first comparator U
1And the second comparator U
2Output terminal output all export positive voltage, start module 22 with control and close blower module 21.
The startup module 22 of present embodiment comprises the 3rd switching element Q
3, the 4th switching element Q
4, at least one capacitor C, at least one resistor R
3With a plurality of diode D
1, D
2Wherein, the 3rd switching element Q
3And the 4th switching element Q
4Can be that transistor or other have the electronic component of switch effect, in the present embodiment, the 3rd switching element Q
3Be the PMOS transistor, the 4th switching element Q
4It is nmos pass transistor.
The 3rd switching element Q
3Source S and diode D
1, D
2Be electrically connected the 3rd switching element Q
3Drain D be electrically connected with blower module 21, to start blower module 21, the three switching element Q
3Grid G and the 4th switching element Q
4Drain D be electrically connected the end of capacitor C and the 3rd switching element Q
3Source S be electrically connected resistor R
3Be electrically connected with the other end of capacitor.In addition, diode D
1, D
2Can be Schottky diode (Schottky Diodes), in order to prevent backward current.The 4th switching element Q
4Grid G respectively with the first switching element Q
1Drain D and second switch element Q
2Drain D be electrically connected.
It is as follows that fan system 2 is made flowing mode: when the inside temperature of electronics between first temperature and second temperature when (normal working temperature scope), at this moment, the sensing signal V that temp-sensing element 24 produces
tBe higher than the first reference signal V
Ref1, and be lower than the second reference signal V
Ref2, so the first switching element Q
1And second switch element Q
2Close the 4th switching element Q
4Open.
And capacitor C begins charging, reaches the 3rd switching element Q up to the magnitude of voltage of capacitor C
3Cut-in voltage the time, the 3rd switching element Q
3Unlatching is dispelled the heat to start blower module 21.It should be noted that fan system 2 can pass through capacitor C and resistor R
3Charging circuit, make the flow through electric current of blower module 21 increase with speed comparatively slowly, make it reach the effect of soft start.
When the inside temperature of electronics is higher than first temperature, this moment sensing signal V
tBe lower than the first reference signal V
Ref1, so the first switching element Q
1Open the 4th switching element Q
4And the 3rd switching element Q
3Close, thereby blower module 21 is closed, with purpose and the effect that reaches protection.
In like manner, when the inside temperature of electronics is lower than second temperature, this moment sensing signal V
tBe higher than the second reference signal V
Ref2, so second switch element Q
2Open the 4th switching element Q
4And the 3rd switching element Q
3Close, thereby blower module 21 is closed, with purpose and the effect that reaches protection.From the above, whether fan system 2 is higher than upper limit working temperature or is lower than the lower limit operating temperature by temp-sensing element 24 sensing inside temperatures, and when being higher than upper limit working temperature or be lower than the lower limit operating temperature, positive closing blower module 21 damages to prevent fan system 2.
The present invention also discloses a kind of temperature feel protection device, and it matches with blower module.Temperature feel protection device system comprises startup module, temp-sensing element and control module, and it is the same with above-mentioned startup module 22, temp-sensing element 24 and control module 23, has identical formation and function, is not given unnecessary details at this.
In sum,, be in when too high or too low, close blower module to reach the effect of protection by temp-sensing element surveying work temperature according to fan system of the present invention and temperature feel protection device thereof.Compared with prior art, fan system of the present invention and temperature feel protection device thereof are to utilize temp-sensing element sensing operating temperature, and be normal to guarantee the fan system running, and can replace analog control chip to reduce the integral production cost.
The above only is exemplary, rather than restrictive.Anyly do not break away from spirit of the present invention and category, and, all should be included in the accompanying claim its equivalent modifications of carrying out or change.
Claims (17)
1. fan system comprises:
Blower module;
Start module, it is electrically connected with described blower module, and in order to start described blower module;
Temp-sensing element, it produces corresponding sensing signal according to ambient temperature; And
Control module, it receives described sensing signal, and according to described sensing signal to control described startup module, when described ambient temperature is higher than first temperature or is lower than second temperature, control described startup module to close described blower module.
2. fan system according to claim 1, wherein, described control module comprises:
First control unit, it is electrically connected with described temp-sensing element, and according to described sensing signal controlling described startup module, when described ambient temperature is higher than described first temperature, control described startup module to close described blower module; And
Second control unit, it is electrically connected with described temp-sensing element, and according to described sensing signal controlling described startup module, when described ambient temperature is lower than described second temperature, control described startup module to close described blower module.
3. fan system according to claim 2, wherein, described first control unit comprises:
First switching element, it is electrically connected with described startup module; And
First comparator, it has first input end, second input end and output terminal, and described first input end receives first reference signal, and described second input end receives described sensing signal, described output terminal is electrically connected with described first switching element, to control described first switching element.
4. fan system according to claim 2, wherein, described second control unit comprises:
The second switch element, it is electrically connected with described startup module; And
Second comparator, it has first input end, second input end and output terminal, and described first input end receives described sensing signal, and described second input end receives second reference signal, described output terminal is electrically connected with described second switch element, to control described second switch element.
5. according to claim 3 or 4 described fan systems, wherein, described first switching element and described second switch element are transistors.
6. according to claim 3 or 4 described fan systems, wherein, the described first input end of described first comparator and described second comparator is a normal phase input end, and described second input end of described first comparator and described second comparator is an inverting input.
7. fan system according to claim 3, wherein, described second input end of described first comparator is electrically connected with resistor respectively with described output terminal.
8. fan system according to claim 4, wherein, the described first input end of described second comparator is electrically connected with resistor respectively with described output terminal.
9. fan system according to claim 1, wherein, described startup module comprises:
The 3rd switching element, the one end is electrically connected with described blower module, to control described blower module;
The 4th switching element, it is electrically connected with described the 3rd switching element, to control described the 3rd switching element;
Capacitor, the one end is electrically connected with described the 3rd switching element;
Resistor, it is connected with described capacitor electrode; And
At least one diode, its first termination is received input voltage, and second end is electrically connected with described the 3rd switching element.
10. fan system according to claim 9, wherein, described the 3rd switching element and described the 4th switching element are respectively transistors.
11. fan system according to claim 1, wherein, described temp-sensing element is thermistor or negative tempperature coefficient thermistor.
12. a temperature feel protection device, it matches with blower module, comprising:
Start module, it is electrically connected with described blower module, and in order to start described blower module;
Temp-sensing element, it produces corresponding sensing signal according to ambient temperature; And
Control module, it receives described sensing signal, and according to described sensing signal to control described startup module, when described ambient temperature is higher than first temperature or is lower than second temperature, control described startup module to close described blower module.
13. temperature feel protection device according to claim 12, wherein, described control module comprises:
First control unit, it is electrically connected with described temp-sensing element, and according to described sensing signal controlling described startup module, when described ambient temperature is higher than described first temperature, control described startup module to close described blower module; And
Second control unit, it is electrically connected with described temp-sensing element, and according to described sensing signal controlling described startup module, when described ambient temperature is lower than described second temperature, control described startup module to close described blower module.
14. temperature feel protection device according to claim 13, wherein, described first control unit comprises:
First switching element, it is electrically connected with described startup module; And
First comparator, it has first input end, second input end and output terminal, and described first input end receives first reference signal, and described second input end receives described sensing signal, described output terminal is electrically connected with described first switching element, to control described first switching element.
15. temperature feel protection device according to claim 13, wherein, described second control unit comprises:
Calculate two switching elements, it is electrically connected with described startup module; And
Second comparator, it has first input end, second input end and output terminal, and described first input end receives described sensing signal, and described second input end receives second reference signal, described output terminal is electrically connected with described second switch element, to control described second switch element.
16. temperature feel protection device according to claim 12, wherein, described startup module comprises:
The 3rd switching element, the one end is electrically connected with described blower module, to control described blower module;
The 4th switching element, it is electrically connected with described the 3rd switching element, to control described the 3rd switching element;
Capacitor, the one end is electrically connected with described the 3rd switching element;
Resistor, it is connected with described capacitor electrode; And
At least one diode, its first termination is received input voltage, and second end is electrically connected with described the 3rd switching element.
17. temperature feel protection device according to claim 12, wherein, described temp-sensing element is thermistor or negative tempperature coefficient thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510125900 CN1978915A (en) | 2005-11-30 | 2005-11-30 | Fan system and temperature feel protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510125900 CN1978915A (en) | 2005-11-30 | 2005-11-30 | Fan system and temperature feel protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1978915A true CN1978915A (en) | 2007-06-13 |
Family
ID=38130186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510125900 Pending CN1978915A (en) | 2005-11-30 | 2005-11-30 | Fan system and temperature feel protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1978915A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072183A (en) * | 2008-03-06 | 2011-05-25 | 德尔塔T公司 | Fan control system with sensor |
| US8672649B2 (en) | 2007-10-10 | 2014-03-18 | Delta T Corporation | Ceiling fan system with brushless motor |
-
2005
- 2005-11-30 CN CN 200510125900 patent/CN1978915A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8672649B2 (en) | 2007-10-10 | 2014-03-18 | Delta T Corporation | Ceiling fan system with brushless motor |
| US11268528B2 (en) | 2007-10-10 | 2022-03-08 | Delta T, Llc | Ceiling fan system with brushless motor |
| CN102072183A (en) * | 2008-03-06 | 2011-05-25 | 德尔塔T公司 | Fan control system with sensor |
| CN102072183B (en) * | 2008-03-06 | 2014-09-03 | 德尔塔T公司 | Fan control system with sensor |
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