CN102562637A - Fan speed control method and device for computer power supply - Google Patents

Abstract

A fan rotation speed control method and device of a computer power supply mainly comprises a temperature control module, a heat source detection unit and a power supply module, wherein the temperature control module is respectively electrically connected with the heat source detection unit and the power supply module and controls the action of a fan, the heat source detection unit is used for detecting the temperature of a working environment and continuously returning to the temperature control module, if the temperature of the working environment rises to a first critical temperature T1 and does not reach a second critical temperature T2, the fan keeps static continuously, if the temperature rises to the first critical temperature T1, the fan is started to a starting rotation speed, the rotation speed keeps linear relation with the temperature rise or fall, and when the temperature of the working environment falls to the first critical temperature T1, the fan stops rotating, so that the service life of the fan is protected.

Description

Fan speed control method and device for computer power supply

technical field

The present invention relates to a fan control method, especially a fan speed control method and device for a computer power supply.

Background technique

The fan device is a common and indispensable equipment in electronic devices at present. As the electronic components in electronic devices such as computers are becoming smaller and smaller, the heat generated by them is increasing due to the influence of technology and materials. Therefore, with the help of the rotation of the fan, the air inside the body can be flowed, and the heat dissipation can be performed inside the body when the air convection is generated.

Therefore, the use of fans has become a simple and practical choice in the overall cooling strategy, and therefore cooling through fans has become the most used strategy at present; and in the face of the continuous increase in the heat generated by electronic components Therefore, it is natural to choose to increase the speed of the fan to improve the heat dissipation efficiency of the overall heat convection and to accelerate the replacement of hot and cold air. Continuing power consumption and noise issues.

Therefore, how to maintain the heat dissipation efficiency of the fan on the one hand, and on the other hand meet the requirements of energy saving and environmental protection, has become a goal of fan heat dissipation. For such a goal, the rotation and speed of the fan are controlled through temperature detection. Common practice at present, as shown in Figure 1, the fan speed control device of known computer power supply mainly comprises a control module 10, a temperature detection unit 20 and a power supply module 30, and wherein this control module 10 is connected with the temperature respectively. The detection unit 20 is electrically connected to the power supply module 30, and the control module 10 is directly electrically connected to a fan 40. As shown in the temperature and rotational speed curve in FIG. 2, when the temperature detection unit 20 detects that the temperature inside the body reaches the first When the critical temperature T1 is lower than the second critical temperature T2, the fan 40 remains in a static state, and the temperature detection unit 20 continues to detect the temperature inside the body until the second critical temperature T2, and the control module 10 receives its After the command, turn on the power supply module 30 and start the fan 40 directly, and according to the temperature rise inside the body, the speed of the fan 40 will run linearly with the temperature until the temperature rises to the maximum value Tmax, and the fan speed also reaches the maximum value. Umax; and when the temperature in the body begins to drop due to the heat dissipation effect of the fan 40, before reaching the second critical temperature T2, the speed of the fan 40 is still running linearly with the temperature until it is lower than the second critical temperature T2. When the critical temperature T2, the fan 40 will reduce its rotating speed to the state of U1rpm and maintain its rotating speed until the temperature detection unit 20 detects that the temperature inside the body drops to the first critical temperature T1, then the control module 10 will directly turn the fan 40 closure.

Although the above-mentioned fan control method can improve the energy consumption, loss and noise problems of the fan in the prior art at the continuous maximum speed, however, in the above-mentioned technology, if the start of the fan 40 is judged according to the second critical temperature T2, and the temperature of the fan 40 Stopping is determined by the first critical temperature T1. If the temperature in the body is between the first critical temperature T1 and the second critical temperature T2, the fan 40 will continue to rotate. If the fan 40 continues to operate, its The problems are still the same as those caused by previous fan control technology, including power consumption, loss and noise problems are still ongoing.

Contents of the invention

The purpose of the present invention is to provide a method and device for controlling the fan speed of a computer power supply. Through the temperature detection method and the fan control mode, the fan speed and the operating temperature can maintain a linear relationship, and the fan speed can be controlled in different working conditions. The temperature is matched with different fan speed strategies to ensure the normal use of the fan.

Another object of the present invention is to provide a method and device for controlling the fan speed of a computer power supply, which maintains a linear relationship between the fan speed and operating temperature, and meets the environmental protection requirements of low noise, low energy consumption and low loss.

In order to achieve the above object, the present invention provides a method and device for controlling the fan speed of a computer power supply, mainly including a temperature control module, a heat source detection unit and a power supply module, wherein the temperature control module is connected to the heat source detection unit respectively. The unit and the power supply module are electrically connected, and control the operation of a fan. The heat source detection unit is used to detect the temperature of the working environment and continuously report it to the temperature control module. If the temperature of the working environment rises to the first critical temperature T1 but does not reach the second The second critical temperature T2, the fan keeps still, if the temperature rises to the first critical temperature T1, the fan starts up to a starting speed, and the speed maintains a linear relationship with the temperature rise or fall until the working environment temperature drops to the first When the critical temperature is T1, the fan stops rotating, thereby protecting the service life of the fan.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

Description of drawings

FIG. 1 is a block diagram of a conventional fan speed control device for a computer power supply.

Fig. 2 is a conventional graph of temperature and rotational speed.

Fig. 3 is a structural block diagram of the present invention.

Fig. 4 is a flow chart of the state operation of the present invention.

Fig. 5 is a curve diagram of temperature and rotational speed of the present invention.

Fig. 6 is a flow chart of the method (S1) to (S5) of the present invention.

reference sign

Control module 10 Temperature detection unit 20

Power supply module 30 Fan 40

The first critical temperature T1 The second critical temperature T2

Maximum temperature Tmax Maximum speed Umax

Temperature control module 1 Temperature control unit 11

Fan control unit 12 Heat source detection unit 2

Power supply module 3 fan 4

The first critical temperature T1 The second critical temperature T2

Maximum temperature Tmax Start speed U

Maximum speed Umax

Detailed ways

The content of the present invention is hereby described in conjunction with the accompanying drawings:

Please refer to FIG. 3 , which is a structural block diagram of the present invention. The fan speed control device of the computer power supply of the present invention mainly includes a temperature control module 1, a heat source detection unit 2 and a power supply module 3, and the temperature control module 1 is electrically connected to the heat source detection unit 2 and the power supply module 3 respectively. , wherein the temperature control module 1 further includes a temperature control unit 11 and a fan control unit 12, the temperature control unit 11 and the fan control unit 12 are electrically connected to each other, and the temperature control unit 11 is used to receive the heat source detection unit 2 The detected temperature data is analyzed according to the temperature data and then the fan operation is controlled. In addition, the fan control unit 12 is used to electrically connect at least one fan 4, and accepts the instructions of the temperature control unit 11 to perform fan 4 operation. Power and speed control.

Please refer to FIG. 4 and FIG. 5 for the state operation flow chart and the graph of temperature and fan speed. As shown in the figure, the heat source detection unit 2 is responsible for detecting the temperature of its working environment, and continuously reports to the temperature control unit 11. When the heat source detection unit 2 detects that the temperature of the working environment reaches the first critical temperature T1, but has not reached the second Two critical temperature T2, at this time, the second critical temperature T2 is greater than the first critical temperature T1, the fan 4 remains still to the state; and the heat source detection unit 2 continuously detects that the temperature of its working environment reaches the second critical temperature T2 and The temperature control unit 11 is reported, and the temperature control unit 11 directly reports to the fan control unit 12 to start the fan 4. Referring to FIG. The rotating speed directly increases a starting speed U, and the heat source detection unit 2 continuously detects the temperature of the working environment. If the temperature of the working environment continues to rise, the temperature control unit 11 directly reports back to the fan control unit 12 to make its fan The speed of the fan 4 is accelerated, which has a linear relationship with the temperature of the working environment, until the temperature reaches the maximum value Tmax, the maximum speed Umax of the fan 4, the maximum speed of the fan 4 refers to the maximum speed of the motor of the fan 4.

Continuation of Fig. 4 and Fig. 5; if the temperature of the working environment detected by the heat source detection unit 2 starts to drop due to the heat dissipation effect of its fan 4, the fan 4 is also controlled by its fan control unit 12 and decreases linearly with the temperature, and When the temperature drops to less than the second critical temperature T2, but the temperature of its working environment is still greater than the first critical temperature T1, the speed of the fan 4 also begins to be lower than the starting speed U, but the speed of the fan 4 is still the same as the first critical temperature T1. The temperature of the working environment has a linear relationship. By maintaining a linear relationship between the speed of the fan 4 and the working temperature, the energy consumption, loss and noise of the fan 4 will be reduced as the temperature drops, ensuring the service life of the fan 4. When the working environment When the temperature drops to the first critical temperature T1, as shown in FIG. 5, the fan 4 is directly turned off and no longer operates, so as to ensure the usage of the fan 4 and prolong its life.

Please refer to FIG. 6 , which is a flow chart of the method of the present invention, and represents the aforementioned operation method as a block flow chart. First, the heat source detection unit 2 detects the working environment temperature (S1), the heat source detection unit 2 detects the working environment temperature to the first critical temperature, but is less than the second critical temperature, and keeps the fan in the static mode (S2), the heat source The detection unit 2 detects the temperature of the working environment to the second critical temperature, and turns on the fan rotation mode directly to a set speed (S3), and then the heat source detection unit 2 continues to detect the temperature of the working environment. If the working temperature continues to be greater than the first critical temperature, then Keep the rotation speed of the fan and the temperature in a linear relationship (S4), and finally, if the temperature of the working environment detected by the heat source detection unit 2 reaches the first critical temperature, the fan returns to the static mode (S5).

However, the above-mentioned implementation mode is a preferred implementation example, and should not limit the implementation scope of the present invention. If the equivalent changes or modifications made according to the content of the description of the present invention, all should belong to the scope of protection covered by the present invention. within.

Claims (6)

1. A fan speed control method for a computer power supply, characterized in that the steps include: a. Detect the working environment temperature; b. Detect the temperature of the working environment to the first critical temperature, but less than the second critical temperature, and keep the fan in the static mode; c. Detect the temperature of the working environment to the second critical temperature, turn on the fan rotation mode and directly start the speed; d. Continuously detect the temperature of the working environment. If the working temperature is continuously higher than the first critical temperature, keep the fan speed and temperature in a linear relationship; e. The temperature of the working environment is detected to reach the first critical temperature, and the fan returns to the static mode. 2. The method for controlling the speed of a fan of a computer power supply according to claim 1, wherein the maximum speed of the fan in step d is the maximum speed of the motor. 3. The method for controlling the speed of a fan of a computer power supply according to claim 1, wherein in step d, when the fan speed is linearly related to the temperature and runs until the temperature reaches a maximum value, the fan also reaches the maximum value. 4. The method for controlling the fan speed of a computer power supply according to claim 1, wherein if the operating temperature in step d is less than the second critical temperature but greater than the first critical temperature, the fan speed is less than the start-up speed . 5. A fan speed control device for a computer power supply, used to control a fan speed, characterized in that the device includes: a temperature detection unit; A temperature control module, electrically connected to the temperature detection unit, controls the fan speed after receiving the signal from the temperature detection unit; and A power supply module is electrically connected with the temperature control module for receiving signals from the temperature control module to supply power to the fan. 6. The fan speed control device of a computer power supply according to claim 5, wherein the temperature control module further comprises: a temperature control unit electrically connected to the temperature detection unit for receiving the temperature detection unit signal.

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