CN216812248U - Control circuit of cooling fan, cooling device and power supply equipment - Google Patents
Control circuit of cooling fan, cooling device and power supply equipment Download PDFInfo
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- CN216812248U CN216812248U CN202123305831.4U CN202123305831U CN216812248U CN 216812248 U CN216812248 U CN 216812248U CN 202123305831 U CN202123305831 U CN 202123305831U CN 216812248 U CN216812248 U CN 216812248U
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- 238000001816 cooling Methods 0.000 title claims abstract description 38
- 239000003990 capacitor Substances 0.000 claims description 64
- 230000017525 heat dissipation Effects 0.000 claims description 52
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 9
- 238000004146 energy storage Methods 0.000 claims description 3
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- 230000005855 radiation Effects 0.000 description 3
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Abstract
The application provides a radiator fan's control circuit, heat abstractor and power supply unit, this radiator fan's control circuit includes: the circuit comprises a ramp wave generating circuit and a driving circuit, wherein the ramp wave generating circuit comprises a thermistor module; the ramp generating circuit is used for outputting a ramp voltage signal corresponding to the changed resistance value of the thermistor module when the resistance value of the thermistor module is changed; and the driving circuit is used for driving the cooling fan according to the ramp voltage signal. The design of carrying out radiating circuit can be simplified to this application, reduces manufacturing cost.
Description
Technical Field
The application relates to the technical field of power supplies, in particular to a control circuit of a cooling fan, a cooling device and power supply equipment.
Background
In the power supply device, the power supply assembly inside the power supply device needs to be cooled by the cooling fan, so that the normal use of the power supply device is ensured, and the service life of the power supply device is prolonged. In the currently used control method of the cooling fan, the working voltage of the cooling fan is mostly controlled by a single chip microcomputer, so as to control the rotating speed of the cooling fan, but the single chip microcomputer is used to design the logic of the single chip microcomputer, so that the manufacturing cost of the power supply equipment is increased.
SUMMERY OF THE UTILITY MODEL
A main object of the present invention is to provide a control circuit of a heat dissipation fan, a heat dissipation device, and a power supply apparatus, which aim to simplify the design of a circuit for dissipating heat so as to reduce the manufacturing cost of the power supply apparatus.
In a first aspect, the present application provides a control circuit of a heat dissipation fan, including: the circuit comprises a ramp wave generating circuit and a driving circuit, wherein the ramp wave generating circuit comprises a thermistor module;
the ramp generating circuit is used for outputting a ramp voltage signal corresponding to the changed resistance value of the thermistor module when the resistance value of the thermistor module is changed;
the driving circuit is used for driving the heat radiation fan according to the ramp voltage signal.
In an embodiment, the ramp generating circuit further includes a voltage comparing module and a first capacitance module;
the first input end of the voltage comparison module is used for being connected with a preset power supply, the second input end of the voltage comparison module is connected with the first end of the first capacitor module, the output end of the voltage comparison module is connected with the first end of the thermistor module, the second end of the thermistor module is connected with the first end of the first capacitor module, the second end of the first capacitor module is grounded, and the first end of the first capacitor module is also connected with the output end of the oblique wave generation circuit;
the voltage comparison module is used for comparing the input voltage of the first input end with the input voltage of the second input end and outputting a comparison voltage according to a comparison result;
the thermistor module is used for detecting the ambient temperature and adjusting the resistance value according to the ambient temperature so as to adjust the charging and discharging time of the first capacitor module through the change of the resistance value and the comparison voltage;
the first capacitor module is used for entering an energy storage state when the comparison voltage is a first voltage, and switching to a discharge state when the comparison voltage is a second voltage so as to output the ramp voltage signal at the output end of the ramp generating circuit.
In an embodiment, the ramp wave generating circuit further includes a voltage dividing module, a first end of the voltage dividing module is connected to the preset power supply, a second end of the voltage dividing module is grounded, and a voltage dividing end of the voltage dividing module is connected to a first input end of the voltage comparing module.
In one embodiment, the voltage comparison module comprises a voltage comparator and a third resistor, wherein a non-inverting input terminal of the voltage comparator is connected with a first input terminal of the voltage comparison module, and an inverting input terminal of the voltage comparator is connected with a second input terminal of the voltage comparison module; the output end of the voltage comparator is connected with the output end of the voltage comparison module, and the third resistor is connected between the output end of the voltage comparator and the non-inverting input end of the voltage comparator.
In an embodiment, the control circuit of the heat dissipation fan further includes a second capacitor circuit, a first end of the second capacitor circuit is connected to the output end of the driving circuit, and a second end of the second capacitor circuit is grounded;
the second capacitor circuit is used for outputting a first working current to the output end of the driving circuit.
In one embodiment, the driving circuit comprises a voltage stabilizing tube module and a switch module, wherein an input end of the voltage stabilizing tube module is connected with an output end of the ramp wave generating circuit, an output end of the voltage stabilizing tube module is connected with a control end of the switch module, a first end of the switch module is used for connecting a power supply, and a second end of the switch module is connected with an output end of the driving circuit;
the voltage stabilizing tube module is used for outputting a conducting voltage when the oblique wave voltage signal is greater than or equal to a threshold voltage, and outputting a cut-off voltage when the oblique wave voltage signal is less than the threshold voltage;
the switch module is used for being switched on when receiving the switching-on voltage and is also used for being switched off when receiving the switching-off voltage.
In one embodiment, the voltage regulator tube module comprises a voltage regulator tube, an input end of the voltage regulator tube is connected with an input end of the voltage regulator tube module, an output end of the voltage regulator tube is connected with an output end of the voltage regulator tube module, and a grounding end of the voltage regulator tube is grounded.
In one embodiment, the switch module includes a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first switch tube and a second switch tube;
the first end of the second resistor is connected with the output end of the voltage stabilizing tube module, and the second end of the second resistor is connected with the control end of the first switching tube;
the first end of the third resistor is connected with the control end of the first switching tube, and the second end of the third resistor is connected with a power supply;
the first end of the first switch tube is grounded, and the second end of the first switch tube is connected with the control end of the second switch tube through the fourth resistor;
the first end of the second switch tube is connected with the output end of the driving circuit and is grounded, and the second end of the second switch tube is connected with the power supply;
the first end of the fifth resistor is connected with the control end of the second switch tube, and the second end of the fifth resistor is connected with the power supply.
In a second aspect, the present application provides a heat dissipation device, which includes a heat dissipation fan and the above-mentioned control circuit.
In a third aspect, the present application provides a power supply apparatus comprising a power supply assembly and the heat sink described above.
The application provides a control circuit, a heat dissipation device and power supply equipment of a heat dissipation fan, wherein the control circuit of the heat dissipation fan comprises a ramp wave generating circuit and a driving circuit, and the ramp wave generating circuit comprises a thermistor module; the ramp generating circuit is used for outputting a ramp voltage signal corresponding to the changed resistance value of the thermistor module when the resistance value of the thermistor module is changed; and the driving circuit is used for driving the cooling fan according to the ramp voltage signal. The embodiment of the application simplifies the design of a circuit for heat dissipation, and can realize temperature detection and adjust the wind speed of the heat dissipation fan through the circuit, thereby reducing the manufacturing cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a circuit diagram of an embodiment of a control circuit of a heat dissipation fan according to an embodiment of the present disclosure;
fig. 2 is a circuit diagram illustrating another embodiment of a control circuit of a heat dissipation fan according to an embodiment of the present disclosure;
fig. 3 is a circuit diagram illustrating another embodiment of a control circuit of a heat dissipation fan according to an embodiment of the present disclosure;
fig. 4 is a circuit diagram illustrating another embodiment of a control circuit of a heat dissipation fan according to an embodiment of the present disclosure;
fig. 5 is a circuit diagram illustrating a control circuit of a cooling fan according to another embodiment of the present disclosure;
fig. 6 is a circuit diagram illustrating a control circuit of a cooling fan according to yet another embodiment of the present disclosure;
fig. 7 is a circuit diagram illustrating a control circuit of a heat dissipation fan according to yet another embodiment of the present disclosure;
fig. 8 is a circuit diagram illustrating a control circuit of a heat dissipation fan according to yet another embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a heat dissipation device according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of a power supply apparatus according to an embodiment of the present application;
description of reference numerals:
10. a ramp generating circuit; 20. a drive circuit; 30. a second capacitance circuit;
11. a thermistor module; 12. a voltage comparison module; 13. a first capacitive module;
14. a voltage division module; 111. a thermistor; 121. a voltage comparator;
21. a surge pipe module; 22. a switch module; 100. a heat sink;
110. a heat radiation fan; 120. a drive circuit of the heat radiation fan; 200. a power supply device;
210. a power supply component; VCC1, a preset power supply; VCC2, power supply.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Referring to fig. 1, fig. 1 is a circuit diagram of an embodiment of a control circuit of a heat dissipation fan according to an embodiment of the present disclosure.
As shown in fig. 1, the control circuit of the heat dissipation fan includes a ramp generating circuit 10 and a driving circuit 20. The ramp generating circuit 10 includes a thermistor module 11. The ramp generating circuit 10 can output a ramp voltage signal corresponding to the changed resistance value of the thermistor module 11 when the resistance value of the thermistor module 11 changes; the driving circuit 20 receives the ramp voltage signal and drives the heat dissipation fan connected to the driving circuit 20 according to the ramp voltage signal.
For example, the thermistor module 11 can detect the change of the temperature of the environment, so that the thermistor module 11 can be arranged at the position where the temperature is to be detected, so that the thermistor module 11 can detect the temperature of the position where the temperature is to be detected.
Illustratively, when the resistance of the thermistor module 11 changes, the ramp voltage signal output by the ramp generating circuit 10 also changes, so that the driving circuit 20 can be adjusted by the ramp voltage signal to adjust the wind speed of the cooling fan according to the detected temperature, thereby achieving the purpose of cooling.
In one embodiment, the thermistor module 11 includes a ntc thermistor 111, and it is understood that the magnitude of the temperature detected by the ntc thermistor 111 is inversely related to the resistance of the ntc thermistor 111, and the magnitude of the voltage corresponding to the ramp voltage signal is inversely related to the resistance of the ntc thermistor 111.
For example, when the ntc thermistor 111 detects a temperature rise, the resistance of the ntc thermistor 111 decreases, the voltage corresponding to the ramp voltage signal increases, the driving circuit 20 is turned on to drive the cooling fan, and the speed of the cooling fan is high at this time, so as to lower the temperature of the ntc thermistor 111.
Similarly, when the ntc thermistor 111 detects that the temperature decreases, the resistance of the ntc thermistor 111 increases, the voltage corresponding to the ramp voltage signal decreases, the driving circuit 20 is turned off, and the wind speed of the cooling fan is switched to a low wind speed or stopped to save electric energy and control the wind speed of the cooling fan.
In one embodiment, as shown in fig. 2 to 3, the ramp generating circuit 10 further includes a voltage comparing module 12 and a first capacitor module 13.
As shown in fig. 3, a first input end of the voltage comparison module 12 is used for connecting a preset power VCC1, a second input end of the voltage comparison module 12 is connected to a first end of the first capacitor module 13, an output end of the voltage comparison module 12 is connected to a first end of the thermistor module 11, a second end of the thermistor module 11 is connected to a first end of the first capacitor module 13, a second end of the first capacitor module 13 is grounded, and the first end of the first capacitor module 13 is further connected to an output end of the ramp wave generation circuit 10.
Illustratively, the first capacitor module 13 includes a first capacitor C1, and specifically, a first terminal of the first capacitor C1 is connected to a first terminal of the first capacitor module 13, and a second terminal of the first capacitor C1 is connected to a second terminal of the first capacitor module 13.
It should be noted that the voltage comparing module 12 is configured to compare the input voltage of the first input terminal with the input voltage of the second input terminal, and output the comparison voltage to the thermistor module 11 according to the comparison result; the thermistor module 11 is used for adjusting a resistance value according to the ambient temperature, so as to adjust the charging and discharging time of the first capacitor module 13 through the change of the resistance value and the output comparison voltage; the first capacitor module 13 is configured to enter an energy storage state when the comparison voltage is a first voltage, and switch to a discharge state when the comparison voltage is a second voltage, so as to output a corresponding ramp voltage signal at an output end of the ramp generating circuit 10.
For example, the input voltage of the first input terminal of the voltage comparing module 12 may be a voltage corresponding to the preset power VCC1, and the preset power VCC1 may be a constant voltage source; the input voltage at the second input terminal may be a voltage corresponding to the first terminal of the first capacitor module 13.
When the input voltage of the first input end of the voltage comparison module 12 is greater than the input voltage of the second end, the comparison voltage output by the output end of the voltage comparison module 12 is at a high level, so as to charge the first capacitor module 13.
Similarly, when the first capacitor module 13 is charged until the voltage corresponding to the first end of the first capacitor module 13 is greater than the input voltage of the first input end of the voltage comparison module 12, that is, the input voltage of the first input end of the voltage comparison module 12 is less than the input voltage of the second end, the comparison voltage output by the output end of the voltage comparison module 12 is at a low level, and the first capacitor module 13 is switched to the discharging mode.
It is understood that the ramp voltage signal can be output at the output terminal of the ramp generating circuit 10 by charging and discharging the first capacitor C1 included in the first capacitor module 13, and the oscillation frequency and period of the ramp voltage signal can be determined by the charging and discharging time periods of the thermistor module 11 and the first capacitor C1. After receiving the different ramp voltage signals, the driving circuit 20 adjusts the high and low wind speeds of the cooling fan according to the ramp voltage signals.
In some embodiments, as shown in fig. 4, the ramp generating circuit 10 further includes a voltage dividing module 14.
The first end of the voltage dividing module 14 is connected to the preset power VCC1, the second end of the voltage dividing module 14 is grounded, and the voltage dividing end of the voltage dividing module 14 is connected to the first input end of the voltage comparing module 12.
Illustratively, the voltage divider module 14 includes a sixth resistor R6 and a seventh resistor R7. The first end of the sixth resistor R6 is connected to the preset power source VCC1, the second end of the sixth resistor R6 is connected to the first input end of the voltage comparison module 12, the second end of the sixth resistor R6 is further connected to the first end of the seventh resistor R7, and the second end of the seventh resistor R7 is grounded, so that voltage division is completed through the sixth resistor R6 and the seventh resistor R7.
In some embodiments, as shown in fig. 4, the voltage comparison module 12 includes a voltage comparator 121 and a first resistor R1.
The non-inverting input terminal of the voltage comparator 121 is connected to the first input terminal of the voltage comparison module 12, the inverting input terminal of the voltage comparator 121 is connected to the second input terminal of the voltage comparison module 12, the output terminal of the voltage comparator 121 is connected to the output terminal of the voltage comparison module 12, and the first resistor R1 is connected between the output terminal of the voltage comparator 121 and the non-inverting input terminal.
For example, the voltage comparator 121 can be used to compare the voltage of the non-inverting input terminal with the voltage of the inverting input terminal and output a corresponding output voltage according to the comparison result. The output of the voltage comparator 121 can be protected by the first resistor R1.
Illustratively, the ramp generating circuit 10 controls the driving circuit 20 to be turned on or off through the ramp generating signal, so as to control the cooling fan 110 through the driving circuit 20, so that the thermistor module 11 in the ramp generating circuit 10 can control the wind speed of the cooling fan 110, thereby achieving the purpose of temperature control.
In some embodiments, as shown in fig. 5 to 6, the control circuit of the heat dissipation fan further includes a second capacitor circuit 30, a first end of the second capacitor circuit 30 is connected to the output end of the driving circuit 20, and a second end of the second capacitor circuit 30 is grounded.
Illustratively, the second capacitor circuit 30 includes a second capacitor C2, and specifically, as shown in fig. 6, the second capacitor C2 is connected to the first terminal of the second capacitor circuit 30, and the second capacitor C2 is connected to the second terminal of the second capacitor circuit 30.
Illustratively, the driving circuit 20 and the second capacitor circuit 30 can be used to adjust the wind speed of the cooling fan. Specifically, when the driving circuit 20 responds to different ramp voltage signals, the driving circuit is in a first working state or a second working state, wherein when the driving circuit 20 is in the first working state, a second working current is output at the output end of the driving circuit 20 to drive the cooling fan and charge the second capacitor C2; when the driving circuit 20 is switched to the second operating state in response to the ramp voltage signal, the second capacitor C2 outputs a first operating current to the heat dissipation fan to drive the heat dissipation fan.
It should be noted that the first operating current is smaller than the second operating current, so that when the second operating current is output by the output terminal of the driving circuit 20 to drive the cooling fan, the wind speed of the cooling fan can be considered as a high wind speed; when the second capacitor C2 outputs the first working current to drive the cooling fan, the wind speed of the cooling fan can be considered as a low wind speed, so that the wind speed of the cooling fan can be adjusted.
In some embodiments, as shown in fig. 7, the driving circuit 20 includes a voltage regulator tube module 21 and a switch module 22.
Wherein, the input of zener diode module 21 is connected the output of ramp generating circuit 10, and the control end of switch module 22 is connected to zener diode module 21's output, and switch module 22's first end is used for connecting power supply VCC2, and switch module 22's second end is connected drive circuit 20's output.
It should be noted that the voltage regulator module 21 receives the ramp voltage signal output by the output terminal of the ramp generating circuit 10, and outputs a conducting voltage when the ramp voltage signal is greater than or equal to the threshold voltage corresponding to the voltage regulator module 21, specifically, the voltage regulator module 21 outputs a conducting voltage to the switch module 22, and the switch module 22 is conducted when receiving the conducting voltage output by the voltage regulator module 21, so that the driving circuit 20 can output a second working current to the heat dissipation fan.
When the ramp voltage signal is smaller than the threshold voltage corresponding to the voltage stabilizing pipe module 21, the voltage stabilizing pipe module 21 outputs a cut-off voltage, the switch module 22 is cut off when receiving the cut-off voltage output by the voltage stabilizing pipe module 21, at this time, the driving circuit 20 does not output current, and the second capacitor circuit 30 drives the cooling fan.
In some embodiments, referring to fig. 7 and fig. 8, the zener diode module 21 includes a zener diode 211, wherein an input terminal of the zener diode 211 is connected to an input terminal of the zener diode module 21, an output terminal of the zener diode 211 is connected to an output terminal of the zener diode module 21, and a ground terminal of the zener diode 211 is grounded.
It should be noted that the voltage regulator tube 211 may be used as a switching power supply, specifically, the voltage regulator tube 211 has a threshold voltage, for example, 2.5V, an input end of the voltage regulator tube 211 receives a ramp voltage signal, and when the received ramp voltage signal is greater than or equal to 2.5V, an output end of the voltage regulator tube 211 outputs a conducting voltage, for example, 2.5V, to control the switch module 22 to conduct; when the received ramp voltage signal is less than 2.5, the output terminal of the regulator tube 211 outputs a cut-off voltage, such as 0V, to control the switch module 22 to be turned off.
In some embodiments, as shown in fig. 8, the switch module 22 includes a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first switch tube Q1, and a second switch tube Q2.
A first end of the second resistor R2 is connected to the output end of the zener diode module 21, and a second end of the second resistor R2 is connected to the control end of the first switching tube Q1; a first end of the third resistor R3 is connected to the control end of the first switching tube Q1, and a second end of the third resistor R3 is connected to the power supply VCC 2; a first end of the first switching tube Q1 is grounded, and a second end of the first switching tube Q1 is connected to a control end of the second switching tube Q2 through a fourth resistor R4; a first end of the second switch tube Q2 is connected to the output end of the driving circuit 20 and the ground, and a second end of the second switch tube Q2 is connected to the power supply VCC 2; a first end of the fifth resistor R5 is connected to the control end of the second switch Q2, and a second end of the fifth resistor R5 is connected to the power supply VCC 2.
Specifically, the first switching tube Q1 may be a first triode, wherein a base of the first triode is connected to the control terminal of the first switching tube Q1, a collector of the first triode is connected to the first terminal of the first switching tube Q1, and an emitter of the first triode is connected to the second terminal of the first switching tube Q2; similarly, the second switch tube Q2 may be a second transistor, wherein a base of the second transistor is connected to the control terminal of the second switch tube Q2, a collector of the second transistor is connected to the first terminal of the second switch tube Q2, and an emitter of the second transistor is connected to the second terminal of the second switch tube Q2.
It should be noted that, when the zener diode module 21 outputs the conducting voltage, the first switch Q1 is conducted, and the second switch Q2 is also conducted, so that the power supply VCC2 can provide the second operating current to the heat dissipation fan through the second switch Q2.
Specifically, when the zener diode module 21 outputs the turn-on voltage, the voltage of the second terminal of the first switching tube Q1 is greater than the voltage of the control terminal of the first switching tube Q1, the first switching tube Q1 meets the turn-on condition and is turned on, so that the voltage of the control terminal of the second switching tube Q2 is reduced, so that the voltage of the second terminal of the second switching tube Q2 is greater than the voltage of the control terminal of the second switching tube Q2, and the second switching tube Q2 is also turned on, so that the power supply VCC2 connected to the second terminal of the second switching tube Q2 can output a second working current through the second switching tube Q2 and at the first terminal of the second switching tube Q2, so as to drive the heat dissipation fan and charge the second capacitor circuit 30.
When the voltage regulator module 21 outputs the cut-off voltage, the first switch Q1 and the second switch Q2 are both turned off, so that the power supply VCC2 cannot provide the second working current to the heat dissipation fan, and at this time, the control circuit of the heat dissipation fan provides the first working current to the heat dissipation fan through the second capacitor circuit 30 in the discharging state, so as to drive the heat dissipation fan.
Specifically, when the zener diode module 21 outputs the cut-off voltage, the voltage at the second terminal of the first switching tube Q1 is less than or equal to the voltage at the control terminal of the first switching tube Q1, and the first switching tube Q1 is turned off, so that the voltage at the control terminal of the second switching tube Q2 is less than or equal to the voltage at the second terminal of the second switching tube Q2, and the second switching tube Q2 is turned off, so that the power supply VCC2 cannot output the second working current at the first terminal of the second switching tube Q2.
It is to be understood that, as shown in fig. 8, in the initial state of the control circuit of the heat dissipation fan, the first capacitor C1 does not store electric charge, so that the voltage at the inverting input terminal of the voltage comparator 121 is lower than the voltage at the non-inverting input terminal, the comparison voltage output at the output terminal of the voltage comparator 121 is at a high level, to charge the first capacitor C1 and form a ramp voltage signal at the first terminal of the first capacitor C1, it will be appreciated that, when the first capacitor C1 is charged, the voltage corresponding to the first terminal of the first capacitor C1 continuously increases, and the rate of increase is related to the resistance of the ntc thermistor 111 and the magnitude of the comparison voltage, and when the ramp voltage signal is greater than or equal to the threshold voltage of the regulator tube 211, the regulator tube 211 outputs a turn-on voltage and turns on the first switch tube Q1 and the second switch tube Q2 to output a second working current, drive the cooling fan and charge the second capacitor C2. When the ramp voltage signal is smaller than the threshold voltage of the regulator tube 211, the regulator tube 211 outputs a cut-off voltage to turn on and off the first switch tube Q1 and the second switch tube Q2, and at this time, the second capacitor C2 is switched to a discharge state to output a first working current to drive the cooling fan.
It can be understood that the magnitude of the resistance of the ntc thermistor 111 can adjust the oscillation frequency of the ramp voltage signal, thereby controlling the frequency of the conduction voltage output by the regulator tube 211, controlling the conduction frequency of the first switch tube Q1 and the second switch tube Q2, and realizing the adjustment of the wind speed of the cooling fan.
The driving circuit of the cooling fan of the above embodiment includes a ramp generating circuit 10 and a driving circuit 20, where the ramp generating circuit 10 includes a thermistor module 11; a ramp generating circuit 10 for outputting a ramp voltage signal corresponding to a changed resistance value of the thermistor module 11 when the resistance value of the thermistor module 11 is changed; the driving circuit 20 is used for driving the cooling fan according to the ramp voltage signal, and the purpose of temperature control can be achieved through the circuit without designing a temperature control logic, so that the manufacturing cost is reduced.
Referring to fig. 9, fig. 9 is a schematic structural diagram of a heat dissipation device according to an embodiment of the present disclosure.
As shown in fig. 9, the heat dissipating device 100 includes a heat dissipating fan 110 and a driving circuit 120 of the heat dissipating fan.
The heat dissipation fan 110 is used for dissipating heat; the driving circuit 120 of the heat dissipation fan may be the driving circuit 120 of the heat dissipation fan according to the above embodiment, and the driving circuit 120 of the heat dissipation fan is connected to the heat dissipation fan 110 through an output terminal of the driving circuit 20 for controlling the wind speed of the heat dissipation fan 110.
For example, the driving circuit 120 of the heat dissipation fan may be configured with reference to the examples in fig. 1 to fig. 7, for example, the driving circuit 120 of the heat dissipation fan includes the ramp wave generating circuit 10 and the driving circuit 20 described in the above embodiments, and the specific configuration manner of the driving circuit 120 of the heat dissipation fan may refer to the corresponding embodiments described in this specification, and this embodiment is not repeated herein.
Referring to fig. 10, fig. 10 is a schematic structural diagram of a power supply apparatus according to an embodiment of the present disclosure.
As shown in fig. 10, the power supply device 200 includes the power supply module 210 and the heat sink 100, wherein the heat sink 100 is used for dissipating heat from the power supply module 210.
In some embodiments, the power supply device 200 may further include a charging interface and a discharging interface.
The charging interface and the discharging interface are both connected with the power supply assembly 210, and the charging interface is used for charging the power supply assembly 210 through an external power supply; the discharge interface is used to discharge the power supply assembly 210.
For example, the heat dissipation device 100 may be set with reference to the example of fig. 9, and the specific setting manner of the heat dissipation device 100 may refer to the corresponding embodiment described in the present specification, which is not described herein again.
In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The above disclosure provides many different embodiments or examples for implementing different structures of the application. The components and arrangements of specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above embodiments are only preferred embodiments of the present application, and the protection scope of the present application is not limited thereto, and any insubstantial changes and substitutions made by those skilled in the art based on the present application are intended to be covered by the present application.
Claims (10)
1. A control circuit of a cooling fan is characterized by comprising a ramp wave generating circuit and a driving circuit, wherein the ramp wave generating circuit comprises a thermistor module;
the ramp generating circuit is used for outputting a ramp voltage signal corresponding to the changed resistance value of the thermistor module when the resistance value of the thermistor module is changed;
and the driving circuit is used for driving the cooling fan according to the ramp voltage signal.
2. The control circuit of the heat dissipation fan as claimed in claim 1, wherein the ramp generating circuit further comprises a voltage comparing module and a first capacitance module;
the first input end of the voltage comparison module is used for being connected with a preset power supply, the second input end of the voltage comparison module is connected with the first end of the first capacitor module, the output end of the voltage comparison module is connected with the first end of the thermistor module, the second end of the thermistor module is connected with the first end of the first capacitor module, the second end of the first capacitor module is grounded, and the first end of the first capacitor module is also connected with the output end of the oblique wave generation circuit;
the voltage comparison module is used for comparing the input voltage of the first input end with the input voltage of the second input end and outputting a comparison voltage according to a comparison result;
the thermistor module is used for detecting the ambient temperature and adjusting the resistance value according to the ambient temperature so as to adjust the charging and discharging time of the first capacitor module through the change of the resistance value and the comparison voltage;
the first capacitor module is used for entering an energy storage state when the comparison voltage is a first voltage, and switching to a discharge state when the comparison voltage is a second voltage so as to output the ramp voltage signal at the output end of the ramp generating circuit.
3. The control circuit of claim 2, wherein the ramp generating circuit further comprises a voltage dividing module, a first end of the voltage dividing module is connected to the preset power supply, a second end of the voltage dividing module is grounded, and a voltage dividing end of the voltage dividing module is connected to a first input end of the voltage comparing module.
4. The control circuit of the heat dissipation fan as claimed in claim 2, wherein the voltage comparison module comprises a voltage comparator and a first resistor, a non-inverting input terminal of the voltage comparator is connected to the first input terminal of the voltage comparison module, and an inverting input terminal of the voltage comparator is connected to the second input terminal of the voltage comparison module; the output end of the voltage comparator is connected with the output end of the voltage comparison module, and the first resistor is connected between the output end of the voltage comparator and the non-inverting input end of the voltage comparator.
5. The control circuit of the heat dissipation fan as claimed in claim 1, wherein the control circuit of the heat dissipation fan further comprises a second capacitor circuit, a first end of the second capacitor circuit is connected to the output end of the driving circuit, and a second end of the second capacitor circuit is grounded;
the second capacitor circuit is used for outputting a first working current to the heat dissipation fan.
6. The control circuit of the heat dissipation fan according to any one of claims 1 to 3, wherein the driving circuit comprises a voltage regulation pipe module and a switch module, an input terminal of the voltage regulation pipe module is connected to an output terminal of the ramp wave generation circuit, an output terminal of the voltage regulation pipe module is connected to a control terminal of the switch module, a first terminal of the switch module is used for connecting a power supply, and a second terminal of the switch module is connected to an output terminal of the driving circuit;
the voltage stabilizing tube module is used for outputting a conducting voltage when the oblique wave voltage signal is greater than or equal to a threshold voltage, and outputting a cut-off voltage when the oblique wave voltage signal is less than the threshold voltage;
the switch module is used for being switched on when receiving the switching-on voltage and is also used for being switched off when receiving the switching-off voltage.
7. The control circuit of the heat dissipation fan as claimed in claim 6, wherein the voltage regulator module comprises a voltage regulator tube, an input terminal of the voltage regulator tube is connected to an input terminal of the voltage regulator tube module, an output terminal of the voltage regulator tube is connected to an output terminal of the voltage regulator tube module, and a ground terminal of the voltage regulator tube is grounded.
8. The control circuit of the heat dissipation fan as claimed in claim 6, wherein the switch module comprises a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first switch tube and a second switch tube;
the first end of the second resistor is connected with the output end of the voltage stabilizing tube module, and the second end of the second resistor is connected with the control end of the first switching tube;
the first end of the third resistor is connected with the control end of the first switching tube, and the second end of the third resistor is connected with a power supply;
the first end of the first switch tube is grounded, and the second end of the first switch tube is connected with the control end of the second switch tube through the fourth resistor;
the first end of the second switch tube is connected with the output end of the driving circuit and is grounded, and the second end of the second switch tube is connected with the power supply;
the first end of the fifth resistor is connected with the control end of the second switch tube, and the second end of the fifth resistor is connected with the power supply.
9. A heat dissipating device comprising a heat dissipating fan and the control circuit of any one of claims 1-8.
10. A power supply apparatus comprising a power supply module and the heat dissipating device of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123305831.4U CN216812248U (en) | 2021-12-24 | 2021-12-24 | Control circuit of cooling fan, cooling device and power supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123305831.4U CN216812248U (en) | 2021-12-24 | 2021-12-24 | Control circuit of cooling fan, cooling device and power supply equipment |
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| Publication Number | Publication Date |
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| CN216812248U true CN216812248U (en) | 2022-06-24 |
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| CN202123305831.4U Active CN216812248U (en) | 2021-12-24 | 2021-12-24 | Control circuit of cooling fan, cooling device and power supply equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115589702A (en) * | 2022-09-27 | 2023-01-10 | 超聚变数字技术有限公司 | Electronic device and heat dissipation control method |
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2021
- 2021-12-24 CN CN202123305831.4U patent/CN216812248U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115589702A (en) * | 2022-09-27 | 2023-01-10 | 超聚变数字技术有限公司 | Electronic device and heat dissipation control method |
| CN115589702B (en) * | 2022-09-27 | 2023-09-01 | 超聚变数字技术有限公司 | Electronic device and heat dissipation control method |
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