CN208546343U - A kind of cpu fan control device - Google Patents
A kind of cpu fan control device Download PDFInfo
- Publication number
- CN208546343U CN208546343U CN201821137356.XU CN201821137356U CN208546343U CN 208546343 U CN208546343 U CN 208546343U CN 201821137356 U CN201821137356 U CN 201821137356U CN 208546343 U CN208546343 U CN 208546343U
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- Prior art keywords
- cpu
- controller
- fan
- control device
- fan control
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- Cooling Or The Like Of Electrical Apparatus (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The utility model provides a kind of cpu fan control device, belongs to CPU technical field of heat dissipation.It solves the problems, such as that existing cpu fan radiates to CPU causes to radiate in time to CPU there are certain hysteresis quality.This cpu fan control device include controller and for CPU carry out heat dissipation and fan connected to the controller, it further include voltage comparator and the current sensor for detecting the input current before entering CPU, the current sensor is connect with controller, the one of input terminal of voltage comparator is preset with fan cut-in voltage, another input terminal is connect with controller, and the output end of the voltage comparator is connect with above controller.This cpu fan control device has the advantages that can to radiate in time to CPU and intelligent automatic regulated rotation speed of the fan improves radiating efficiency and effect.
Description
Technical field
The utility model belongs to CPU technical field of heat dissipation, is related to a kind of cpu fan control device.
Background technique
Central processing unit (CPU, Central Processing Unit) is one piece of ultra-large integrated circuit, is one
The arithmetic core (Core) and control core (Control Unit) of platform computer.Its function is mainly interpretive machine instruction
And the data in processing computer software.Central processing unit mainly include arithmetic unit (arithmetic logical unit, ALU,
Arithmetic Logic Unit) and cache memory (Cache) and realize the data (Data) contacted between them,
The bus (Bus) of control and state.
CPU can generate amount of heat in actual operation, therefore in order to maintain its high speed steady operation, need to carry out it
Heat dissipation in time.The heat dissipation problem of notebook CPU is the big factor for restricting notebook development, most to the heat dissipation of notebook at present
It is radiated using radiator fan mode to it.The mode of the opening and closing of control fan is all by detection CPU at present
Whether portion's real time temperature and CPU internal current reach preset value to control, such as disclosed Publication No. CN1991781A, title
For a kind of method and apparatus of detecting temperature of CPU, which includes temperature transducer and controller inside CPU, wherein the control
Device processed includes temperature detection module, and the temperature detection module is for detecting CPU real-time temperature values；The controller further includes electricity
Flow detecting module and computing module, the current detecting module is for detecting the CPU real-time current value and result of detecting is defeated
Enter into computing module, the computing module is for will the CPU real-time temperature values that export from temperature detection module and from electric current
The real-time current value of detecting module output carries out Data Analysis Services and obtains CPU real time temperature correction value, and by the temperature adjustmemt
Value is input in controlled plant.But the program the problem is that: when detecting that cpu temperature rises to preset value, this
When CPU in actual temperature had arrived at preset value, be even more than preset value, just started if opening fan at this time,
Have certain hysteresis quality, due to fan just opened its heat dissipation effect often not and its temperature continue rise speed, lead to CPU meeting
One section the long period its temperature more than preset value, to cannot be radiated in time, influence the normal work of CPU.
Summary of the invention
Purpose of the utility model is to solve the existing above problems, propose a kind of cpu fan control device.
The purpose of this utility model can be realized by the following technical scheme: a kind of cpu fan control device, including control
Device and for carrying out heat dissipation and fan connected to the controller to CPU, it is characterised in that: further include voltage comparator and for examining
Survey the current sensor of the input current before entering CPU, the current sensor connect with controller, the voltage comparator its
In an input terminal be preset with fan cut-in voltage, another input terminal is connect with controller, the output of the voltage comparator
End is connect with above controller.
In a kind of above-mentioned cpu fan control device, input current that the controller detects current sensor
It is converted into input voltage and is conveyed to voltage comparator.
In a kind of above-mentioned cpu fan control device, by being based between the controller and current sensor
The connection of smbus communication protocol connects.
In a kind of above-mentioned cpu fan control device, the current sensor is arranged in cpu power circuit
Input current on AC/DC input terminal and for detecting the AC/DC input terminal.
It is described when input voltage is greater than or equal to fan cut-in voltage in a kind of above-mentioned cpu fan control device
Voltage comparator exports open signal to controller, and controller driving fan opens work；Otherwise, fan remains off.
In a kind of above-mentioned cpu fan control device, be equipped with pwm circuit in the controller, the pwm circuit with
Said fans connect and for controlling rotation speed of the fan.
In a kind of above-mentioned cpu fan control device, another of the pwm circuit and above-mentioned voltage comparator are defeated
Enter end connection.
Compared with prior art, this cpu fan control device has the advantages that following several:
1, the time that can be opened by setting fan cut-in voltage size come sets itself fan, operation CPU is not needed
Just start to detect afterwards, reaction speed is fast, can more quickly control fan, plays better heat dissipation effect；
2, it is big according to the input current size on its AC/DC input terminal to control rotation speed of the fan by pwm circuit for controller
It is small, when input current is excessive, rotation speed of the fan is improved with improving radiating effect, so as to as early as possible to CPU radiating and cooling；When input electricity
Hour is flowed, rotation speed of the fan can be reduced, reaches real-time intelligent automatic adjustment rotation speed of the fan to improve radiating efficiency and effect.
Detailed description of the invention
Fig. 1 is the principles of the present invention block diagram.
Specific embodiment
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
As shown in Figure 1, this cpu fan control device, including controller, voltage comparator, current sensor and for pair
CPU carries out heat dissipation and fan connected to the controller, is equipped with pwm circuit in controller.Pwm circuit, that is, pulse width modulation electricity
Road, PWM are pulse width modulation, are to have very much using the numeral output of microprocessor come the one kind controlled analog circuit
The technology of effect is widely used in from measurement, communicates into many fields of power control and transformation.
It is connected between controller and current sensor by the connection based on smbus communication protocol.Current sensor is set
The input current on the AC/DC input terminal in cpu power circuit and for detecting AC/DC input terminal is set, and will test defeated
Enter current transmission to controller.The one of input terminal of voltage comparator is preset with fan cut-in voltage, the PWM electricity on controller
Road convert thereof into input voltage be conveyed in another input terminal of voltage comparator (certainly, may also set up electricity in controller
Input current is converted into input voltage by the current/voltage converter by stream/electric pressure converter structure)；When input voltage is big
When fan cut-in voltage, voltage comparator exports open signal to controller, and controller driving fan opens work；
Otherwise, fan remains off.The time that can be opened by setting fan cut-in voltage size come sets itself fan, no
Just start to detect after needing to run CPU, reaction speed is fast, fan can be more quickly controlled, at the beginning of the temperature of CPU increases
It is switched on fan work to cool down, to guarantee that CPU is run in threshold temperature always, plays better heat dissipation effect.
After starting fan work, controller can pass through PWM electricity according to the input current size on its AC/DC input terminal
Road controls rotation speed of the fan size, when input current is excessive, improves rotation speed of the fan with improving radiating effect, so as to right as early as possible
CPU radiating and cooling；When input current is small, rotation speed of the fan can be reduced, reaches real-time intelligent automatic adjustment rotation speed of the fan to improve
Radiating efficiency and effect.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (7)
1. a kind of cpu fan control device, including controller and for carrying out heat dissipation and fan connected to the controller to CPU,
Current sensor it is characterized by also including voltage comparator and for detecting the input current before entering CPU, the electric current
Sensor is connect with controller, and the one of input terminal of voltage comparator is preset with fan cut-in voltage, another input
End is connect with controller, and the output end of the voltage comparator is connect with above controller.
2. a kind of cpu fan control device according to claim 1, which is characterized in that the controller passes electric current
The input current of sensor detection is converted into input voltage and is conveyed to voltage comparator.
3. a kind of cpu fan control device according to claim 2, which is characterized in that the controller and electric current passes
It is connected between sensor by the connection based on smbus communication protocol.
4. a kind of cpu fan control device according to claim 1 or 2 or 3, which is characterized in that the current sense
Input current on the AC/DC input terminal that device is arranged in cpu power circuit and for detecting the AC/DC input terminal.
5. a kind of cpu fan control device according to claim 4, which is characterized in that when input voltage is greater than or equal to
When fan cut-in voltage, the voltage comparator exports open signal to controller, and controller driving fan opens work；It is no
Then, fan remains off.
6. a kind of cpu fan control device according to claim 4, which is characterized in that be equipped with PWM in the controller
Circuit, the pwm circuit connect with said fans and for controlling rotation speed of the fan.
7. a kind of cpu fan control device according to claim 6, which is characterized in that the pwm circuit and above-mentioned electricity
Press another input terminal connection of comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821137356.XU CN208546343U (en) | 2018-07-17 | 2018-07-17 | A kind of cpu fan control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821137356.XU CN208546343U (en) | 2018-07-17 | 2018-07-17 | A kind of cpu fan control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208546343U true CN208546343U (en) | 2019-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821137356.XU Expired - Fee Related CN208546343U (en) | 2018-07-17 | 2018-07-17 | A kind of cpu fan control device |
Country Status (1)
| Country | Link |
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| CN (1) | CN208546343U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI681278B (en) * | 2019-04-11 | 2020-01-01 | 群聯電子股份有限公司 | Temperature control circuit, memory storage device and temperature control method |
-
2018
- 2018-07-17 CN CN201821137356.XU patent/CN208546343U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI681278B (en) * | 2019-04-11 | 2020-01-01 | 群聯電子股份有限公司 | Temperature control circuit, memory storage device and temperature control method |
| US11635777B2 (en) | 2019-04-11 | 2023-04-25 | Phison Electronics Corp. | Temperature control circuit, memory storage device and temperature control method |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190226 |
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| CF01 | Termination of patent right due to non-payment of annual fee |