CN212690422U - Fan control circuit - Google Patents
Fan control circuit Download PDFInfo
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- CN212690422U CN212690422U CN202020638372.8U CN202020638372U CN212690422U CN 212690422 U CN212690422 U CN 212690422U CN 202020638372 U CN202020638372 U CN 202020638372U CN 212690422 U CN212690422 U CN 212690422U
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Abstract
A fan control circuit is used for controlling at least one fan of a power supply, and comprises a load sensing module, a temperature sensing module, a control module and a mode switching module, wherein the control module is connected with the load sensing module, the temperature sensing module and the fan, the load sensing module generates a load signal based on the output condition of the power supply, the temperature sensing module senses the internal temperature of the power supply and generates a temperature signal, the control module is provided with a low-speed running mode for controlling the fan based on the load signal, a mute mode for controlling the fan based on the temperature signal, and a full-speed running mode for enabling the fan to work at a rated rotating speed, and the mode switching module enables the control module to adjust the rotating speed of the fan in one of three modes.
Description
Technical Field
The utility model relates to a fan control circuit especially relates to a make fan footpath with fan control circuit of rated revolution work.
Background
The conventional heat dissipation fans are disclosed in patents CN 109695593A, US 7,291,995, CN 109429469A, CN 207382768U, US 7,841,837, US 7,789,130 and US 7,414,375. For example, CN 109695593a discloses that the fan control circuit can have a normal operation mode and a low noise mode according to different received signals, wherein the normal operation mode is that the fan control circuit adjusts the rotation speed of the heat dissipation fan according to the working temperature of the processing module, and the low noise mode is that the fan control circuit firstly turns off the heat dissipation fan and drives the heat dissipation fan to start rotating again when the working temperature of the processing module reaches a certain value. From the foregoing, although the conventional heat dissipation fan can adjust the rotation speed of the heat dissipation fan according to different parameter conditions such as temperature, the conventional heat dissipation fan does not have a function of operating at a rated rotation speed, so that the conventional heat dissipation fan cannot be used by a user to perform enhanced heat dissipation directly at the maximum rated rotation speed. Furthermore, in the conventional structure, if it is intended to determine whether the function of the cooling fan is abnormal or the service life of the cooling fan is long, the fan function cannot be determined by adjusting the rotation speed of the cooling fan to directly enter the full-speed operation mode, and the cooling fan mounted in the electronic device needs to be additionally removed for detection, and the fan is mounted back into the electronic device after the function of the cooling fan is determined to be correct. Further, for example, US 7,841,837 discloses that the fan speed can be controlled according to the open or closed state of the switch, but the specification does not disclose the technology of operating the fan at the rated speed, and the fan disclosed in the patent can not provide the enhanced heat dissipation function or provide the user with the function and life of the fan.
SUMMERY OF THE UTILITY MODEL
The main objective of the present invention is to provide a fan control circuit, which solves the problem that the existing cooling fan does not have the function derived from the rated rotation speed.
To achieve the above object, the present invention provides a fan control circuit disposed in a power supply, the fan control circuit is used for controlling at least one fan belonging to the power supply, wherein the fan control circuit comprises:
the load sensing module is electrically connected with an output end of the power supply to generate a load signal based on the output condition of the output end;
a temperature sensing module for sensing the temperature in the power supply and generating a temperature signal;
the control module is electrically connected with the temperature sensing module, the load sensing module and the fan and is provided with a low-speed running mode for controlling the rotating speed of the fan based on the load signal, a mute mode for controlling the rotating speed of the fan based on the temperature signal and a full-speed running mode for enabling the fan to work at a rated rotating speed; and
the mode switching module is electrically connected with the control module and provides a mode switching signal generated by the operation of a user for the control module, and the mode switching signal determines that the control module controls the fan in one of the low-speed operation mode, the mute mode and the full-speed operation mode.
In the above fan control circuit, the low-speed operation mode is divided into a first speed-up interval following the first speed-up interval and a first constant-speed interval following the first constant-speed interval by a load threshold, and the rotation speed of the fan in the first speed-up interval is proportional to the load of the power supply.
In the fan control circuit, the silent mode is to divide a fan stop operation interval and a plurality of second speed-up intervals by a plurality of temperature-up thresholds, and the rotating speed of the fan in each second speed-up interval is in direct proportion to the temperature in the power supply.
The fan control circuit, wherein the mute mode comprises a second constant speed section between two of the second speed-up sections.
In the fan control circuit, the mode switching module comprises at least one switch piece arranged on the outer surface of the power supply and at least one signal isolating piece connected with the switch piece and the control module.
In the fan control circuit, the signal isolator is an optical coupler.
In the fan control circuit, the mode switching module comprises at least one switch piece arranged on the outer surface of the power supply and at least one signal isolating piece connected with the switch piece and the control module.
In the fan control circuit, the signal isolator is an optical coupler.
Through the utility model discloses aforementioned take off, compare in having following characteristics in the current: the utility model discloses a this control module has this full speed operation mode, makes this fan control circuit can this fan of direct control work with rated speed, makes this fan provide and strengthens heat dissipation function or provide this fan function of user's survey and life by this. Furthermore, the present invention provides a mode switching module, wherein the mode switching module is controlled by the mode switching module to switch the operation mode of the fan, so that the user can adjust the full-speed operation mode or switch the full-speed operation mode to the required operation mode according to the user requirement during the operation of the fan.
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
Drawings
Fig. 1 is a schematic diagram of the elements of an embodiment of the present invention;
fig. 2 is a schematic diagram of a unit of a mute mode according to an embodiment of the present invention;
fig. 3 is a schematic diagram of the fan speed in the silent mode according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the elements of a low speed operation mode according to an embodiment of the present invention;
fig. 5 is a schematic view of the rotation speed of the fan in the low-speed operation mode according to an embodiment of the present invention;
FIG. 6 is a schematic block diagram of a full speed mode of operation according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of fan speed in a full speed mode of operation according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a unit for providing a mode switching signal by the mode switching module according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a unit according to another embodiment of the present invention.
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Detailed Description
The detailed description and technical contents of the present invention are described below with reference to the accompanying drawings:
referring to fig. 1 to 7, the present invention provides a fan control circuit 10, wherein the fan control circuit 10 is disposed in a power supply 20 and is used for controlling a fan 21 belonging to the power supply 20, so as to adjust a rotation speed of the fan 21. The fan control circuit 10 includes a load sensing module 11, a temperature sensing module 12, a control module 13 and a mode switching module 15. The utility model discloses this load perception module 11, this temperature perception module 12, this control module 13 and this mode switch module 15 are all implemented with the circuit that electronic component constitutes, the concrete explanation, this load perception module 11 electric connection this power supply 20's an output 22 and produce a load signal 111 based on this output 22's output situation, and this field general know person can know how to implement based on existing technique, for example examine the output, the output current of examining this power supply 20, do not describe herein repeatedly. Also, the temperature sensing module 12 can be disposed in the power supply 20, and the temperature sensing module 12 senses a temperature change in the power supply 20 and generates a temperature signal 121 based on an ambient temperature in the power supply 20. In addition, the control module 13 is electrically connected to the temperature sensing module 12, the load sensing module 11 and the fan 21, the control module 13 receives the load signal 111 transmitted by the load sensing module 11 and the temperature signal 121 transmitted by the temperature sensing module 12, and the control module 13 further has a driving signal 131 for driving the fan 21 to operate, wherein the driving signal 131 is used for controlling the rotation speed of the fan 21. The control module 13 has a low-speed mode 132 for controlling the speed of the fan 21 based on the load signal 111, a mute mode 133 for controlling the speed of the fan 21 based on the temperature signal 121, and a full-speed mode 134 for operating the fan 21 at a rated speed. The low-speed mode 132 is not to keep the fan 21 at the minimum speed, but to control the speed of the fan 21 at a speed sufficient to satisfy the heat dissipation requirement of the fan 21 in each operation stage. The mute mode 133 is designed based on the noise generated by the fan 21 during operation and the heat dissipation requirement of the power supply 20 at each operation stage. Referring to fig. 8, the mode switching module 15 is electrically connected to the control module 13, the mode switching module 15 provides a mode switching signal 151 to the control module 13 after being operated by a user, and the mode switching signal 151 determines that the control module 13 controls the fan 21 in one of the low-speed operation mode 132, the mute mode 133 and the full-speed operation mode 134.
Next, an embodiment of the fan control circuit 10 of the present invention will be described. Referring back to fig. 1 to 8, to illustrate the implementation of the present invention, it is exemplified that the fan 21 is in the silent mode 133 as a default mode after the power supply 20 is started. At this moment, the control module 13 receives the temperature signal 121 transmitted by the temperature sensing module 12, and the control module 13 generates the driving signal 131 based on the temperature signal 121, thereby controlling the rotation speed of the fan 21. When the temperature signal 121 indicates that the temperature in the power supply 20 is gradually increasing, the control module 13 adjusts the rotation speed of the fan 21 based on the operation criteria of the mute mode 133. At this time, once the mode switching module 15 is operated by the user to send the mode switching signal 151, the control module 13 switches and controls the operating mode of the fan 21 based on the mode switching signal 151. For example, when the mode switching module 15 is a switch, the mode switching signal 151 changes with the on/off of the switch, the control module 13 determines the operation mode based on the number of changes of the mode switching signal 151, and the control module 13 changes based on a preset mode change sequence, such that the mute mode 133 is followed by the low-speed operation mode 132, and the full-speed operation mode 134 is followed by the low-speed operation mode 132. Accordingly, when the mode switching signal 151 changes for the first time, the control module 13 changes the low-speed operation mode 132 to continue the control of the fan 21. Thereafter, if the mode switch signal 151 changes again, the control module 13 changes to operate in the full speed mode 134 based on the change. Once the control module 13 enters the full-speed mode 134, the control module 13 will no longer control the load signal 111 and the temperature signal 121 to operate the fan 21 at the rated speed. It should be appreciated, however, that the mode switch signal 151 is not limited to the embodiments disclosed above, and that any embodiment that achieves the same objectives may be utilized.
Compared with the prior art, the present invention, in addition to enabling the user to actively change the operating mode of the fan 21 according to the implementation requirement through the mode switching module 15, the control module 13 further has the full-speed operating mode 134, so that the fan control circuit 10 can directly control the fan 21 to operate at the rated speed, and the fan 21 can provide the enhanced heat dissipation function or thereby provide the user to measure the function and the service life of the fan 21.
Referring to fig. 1, fig. 4 and fig. 5 again, in an embodiment, the low-speed operation mode 132 is divided into a first constant speed interval 136 and a first speed-increasing interval 137 by a load threshold 135, wherein the rotating speed in the first constant speed interval 136 is a fixed value, and the first speed-increasing interval 137 is continuous with the first constant speed interval 136. In practice, when the load signal 111 does not reach the load threshold 135, the control module 13 controls the fan 21 to operate at the rotation speed value corresponding to the first constant speed interval 136, and when the load signal 111 reaches the load threshold 135, the control module 13 transmits the driving signal 131 and controls the fan 21 to operate at the rotation speed of the first speed-up interval 137, so that the rotation speed of the fan 21 in the first speed-up interval 137 is proportional to the load of the power supply 20. For example, the load threshold 135 can be 20% of the rated output current of the power supply 20 or 20% of the rated load capacity of the power supply 20.
In the embodiment shown in fig. 1 to 3, in the mute mode 133, a fan stop operation interval 139 and a plurality of second speed-increasing intervals 140 are divided by a plurality of temperature-increasing thresholds 138, and the second speed-increasing intervals 140 are continuous with the fan stop operation interval 139. In practice, when the temperature signal 121 does not reach the lowest threshold of the temperature rise thresholds 138, the control module 13 does not drive the fan 21 to operate. When the temperature signal 121 exceeds the lowest threshold of the temperature rise thresholds 138, the control module 13 controls the fan 21 to operate at the rotation speed of each of the second speed-up intervals 140, such that the rotation speed of the fan 21 in each of the second speed-up intervals 140 is proportional to the temperature inside the power supply 20. Also, for the convenience of the reader to understand, it is further illustrated herein that, assuming that the temperature rise thresholds 138 can be 40 ℃, 45 ℃ and 50 ℃ respectively, when the temperature sensing module 12 senses that the temperature in the power supply 20 is less than 40 ℃, the control module 13 does not drive the fan 21, when the temperature sensing module 12 senses that the temperature in the power supply 20 exceeds 40 ℃ but does not reach 45 ℃, the control module 13 transmits the driving signal 131 to control the fan 21 to enter one of the second speed-up intervals 140, and when the temperature sensing module 12 senses that the temperature in the power supply 20 exceeds 45 ℃ but does not reach 50 ℃, the control module 13 controls the fan 21 to enter another of the second speed-up intervals 140. Further, in an embodiment, the mute mode 133 further includes a second constant speed section 141 located between two of the second speed-up sections 140, and the control module 13 controls the fan 21 to enter the second constant speed section 141 to make the rotation speed of the fan 21 constant.
On the other hand, in an embodiment, the mode switching module 15 may be a non-physical switch, and the mode switching module 15 is controlled by communicating with an external electronic device (e.g., a computer, etc.). Furthermore, the mode switching module 15 can also be designed as a physical switch for a user to operate, please refer to fig. 9, the mode switching module 15 includes at least one switch element 152 disposed on the outer surface of the power supply 20 and at least one signal isolation element 153 connected to the switch element 152 and the control module 13, the switch element 152 is used for a user to operate when the operating mode of the fan 21 is to be switched, the signal isolation element 153 is controlled by the switch element 152, and the signal isolation element 153 is normally not triggered so that the mode switching signal 151 is not transmitted to the control module 13. When the switch 152 is operated by a user, the signal isolator 153 is triggered, and the mode switching signal 151 is transmitted to the control module 13 after the signal isolator 153 is triggered, so that the control module 13 enters different operation modes. In one embodiment, the signal isolator 153 may be an optical coupler.
Naturally, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and it is intended that all such changes and modifications be considered as within the scope of the appended claims.
Claims (8)
1. A fan control circuit is arranged in a power supply, and is used for controlling at least one fan of the power supply, and is characterized in that the fan control circuit comprises:
the load sensing module is electrically connected with an output end of the power supply to generate a load signal based on the output condition of the output end;
a temperature sensing module for sensing the temperature in the power supply and generating a temperature signal;
the control module is electrically connected with the temperature sensing module, the load sensing module and the fan and is provided with a low-speed running mode for controlling the rotating speed of the fan based on the load signal, a mute mode for controlling the rotating speed of the fan based on the temperature signal and a full-speed running mode for enabling the fan to work at a rated rotating speed; and
the mode switching module is electrically connected with the control module and provides a mode switching signal generated by the operation of a user for the control module, and the mode switching signal determines that the control module controls the fan in one of the low-speed operation mode, the mute mode and the full-speed operation mode.
2. The fan control circuit as claimed in claim 1, wherein the low-speed operation mode is divided into a first speed-up interval and a first speed-up interval following the first speed-up interval by a load threshold, and the rotation speed of the fan in the first speed-up interval is proportional to the power supply load.
3. The fan control circuit as claimed in claim 1 or 2, wherein the mute mode is characterized in that a fan stop operation interval and a plurality of second speed-up intervals are defined by a plurality of temperature-rise thresholds, and the rotation speed of the fan in each of the second speed-up intervals is proportional to the temperature in the power supply.
4. The fan control circuit of claim 3 wherein the mute mode comprises a second constant speed interval between two of the second ramp-up intervals.
5. The fan control circuit as claimed in claim 3, wherein the mode switching module comprises at least one switch component disposed on an outer surface of the power supply and at least one signal isolation component connecting the switch component and the control module.
6. The fan control circuit of claim 5 wherein the signal isolator is an optocoupler.
7. The fan control circuit as claimed in claim 1 or 2, wherein the mode switching module comprises at least one switch component disposed on an outer surface of the power supply and at least one signal isolation component connecting the switch component and the control module.
8. The fan control circuit of claim 7 wherein the signal isolator is an optocoupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020638372.8U CN212690422U (en) | 2020-04-24 | 2020-04-24 | Fan control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020638372.8U CN212690422U (en) | 2020-04-24 | 2020-04-24 | Fan control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212690422U true CN212690422U (en) | 2021-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020638372.8U Active CN212690422U (en) | 2020-04-24 | 2020-04-24 | Fan control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212690422U (en) |
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2020
- 2020-04-24 CN CN202020638372.8U patent/CN212690422U/en active Active
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