TWM554949U - Fan speed control device of power supply - Google Patents

Description

Fan speed control device for power supply

The invention relates to a fan speed control device, in particular to a fan speed control device of a power supply.

In order to prevent the efficiency of the electronic device or device from being lowered due to heat generation or the problem of malfunction, most of the electronic devices or devices are equipped with a cooling fan. The early cooling fan is usually operated at the maximum speed, and is expected to be in the shortest time. Reduce the temperature of the electronic device or equipment to achieve maximum heat dissipation; improve the heat dissipation efficiency of the overall heat convection by increasing the speed of the fan, and accelerate the replacement of hot air and cold air. This is a natural practice, but keep the fan running at high speed. Underneath, the problem is the premature wear, continuous energy consumption and noise of the fan.

In order to solve the above problems, a cooling fan speed control device that automatically adjusts the rotational speed of the fan according to the temperature of the electronic device or device has emerged, how to provide sufficient heat dissipation efficiency on the one hand, and noise reduction and energy conservation and environmental protection on the other hand. The requirement is the main design goal of the cooling fan speed control device; as shown in FIG. 1 , a known computer power supply fan speed control method and device thereof mainly include: a control module 1, a temperature detecting unit 2, and a power supply. The module 3, wherein the control module 1 is electrically connected to the temperature detecting unit 2 and the power supply module 3, respectively, the control module 1 is directly connected to the fan 4; wherein the control module 1 is controlled according to a preset temperature-fan speed The graph (see Fig. 2) controls the operation and rotation speed of the fan 4, and when the temperature detecting unit 2 detects the power source When the temperature rise of the supplier reaches the first critical temperature T1 but less than the second critical temperature T2, the fan 4 remains stationary, and the temperature detecting unit 2 continuously detects that the temperature rise of the power supply reaches the second critical temperature T2, and the control mode Group 1 drives fan 4 to rotate, and controls the speed of fan 4 to maintain a linear relationship with temperature rise or fall. When the temperature rises to a preset maximum value Tmax (usually determined by the manufacturer), fan 4 will be at maximum speed Umax. Rotating; before the temperature of the power supply begins to drop due to the heat dissipation of the fan 4 but has not reached the second critical temperature T2, the rotational speed of the fan 4 remains linear with the temperature until the temperature is lower than the second critical At the temperature T2, the rotation speed of the control fan 4 is lowered to U1 and kept at the rotation speed until the temperature detecting unit 2 detects that the temperature of the power supply has dropped to the first critical temperature T1, and the control module 1 directly stops the fan 4.

Although the foregoing fan control method can improve the energy consumption, wear and noise problems of the fan of the prior art continuously rotating at the maximum speed, the method and device for controlling the fan speed have only a single control mode, in the electronic device or the power source. The supply is under different loads or different heat conditions, and it is not easy to meet the required heat dissipation performance.

The technical problem to be solved by the present invention is to provide a fan speed control device for a power supply.

In order to solve the foregoing technical problem, the embodiment of the fan speed control device of the power supply provided by the present invention comprises: a temperature control module, a switch, a heat source detecting unit and a power supply module, and the temperature control module and the heat source detecting unit respectively And the power supply module is electrically connected, the heat source detecting unit detects the working environment temperature of the power supply and continuously returns the temperature control module, and the temperature control module includes a first heat dissipation mode and a second heat dissipation for controlling the action and the rotation speed of the fan. The mode, the temperature control module is electrically connected to the switch, and the switch is configured to selectively activate the first heat dissipation mode and the second heat dissipation mode. In either case, the first heat dissipation mode and the second heat dissipation mode control the action and the rotation speed of the fan according to the preset temperature-fan speed control curve, wherein the temperature-fan speed control of both the first heat dissipation mode and the second heat dissipation mode The curve includes a first shifting curve and a second shifting curve. When the working environment temperature is greater than the starting temperature, the temperature control module starts the fan and controls the fan speed according to the first shifting curve, and the working environment temperature drops below the starting temperature but is greater than When the temperature is stopped, the temperature control module controls the rotation speed of the fan according to the second shifting curve. When the working environment temperature drops below the stop temperature, the temperature control module stops the rotation of the fan, wherein the starting temperature is greater than the stopping temperature, the first shifting curve And the second shifting curve is an open-up curve, wherein the starting temperature of the first heat-dissipating mode is lower than the starting temperature of the second heat-dissipating mode, and the stopping temperature of the first heat-dissipating mode is lower than the stopping temperature of the second heat-dissipating mode.

The fan speed control device method for supporting the power supply of the present invention includes: a. detecting a working environment temperature of the power supply; b. starting any one of a first heat dissipation mode and a second heat dissipation mode; c. controlling the action and the rotation speed of the fan according to one of the working environment temperature obtained by the detection and the first heat dissipation mode and the second heat dissipation mode that are activated; wherein the first heat dissipation mode and the second heat dissipation mode are based on the preset temperature The fan speed control curve controls the action and the rotational speed of the fan, wherein the temperature-fan speed control curves of both the first heat dissipation mode and the second heat dissipation mode comprise a first shifting curve and a second shifting curve, and the working environment temperature is greater than the starting temperature The fan is started and the fan speed is controlled according to the first shifting curve. When the working environment temperature drops below the starting temperature but is greater than the stopping temperature, the fan speed is controlled according to the second shifting curve, and the working environment temperature drops below the stopping temperature. Stop the wind The rotation of the fan, wherein the starting temperature is greater than the stopping temperature, the first shifting curve and the second shifting curve are an upward curve, wherein the starting temperature of the first heat dissipation mode is lower than the starting temperature of the second heat dissipation mode, and the first heat dissipation mode is The stop temperature is lower than the stop temperature of the second heat dissipation mode.

Wherein the speed of the fan in the first shifting curve is proportional to the operating temperature, and the speed of the fan in the second shifting curve is proportional to the operating temperature.

When the working temperature reaches the preset maximum temperature and is greater than the maximum temperature, the fan will maintain the maximum speed rotation.

The speed of the fan before stopping is not less than the minimum speed of the fan.

The present invention provides two different heat dissipation modes, which can control the operation and rotation speed of the fan according to one of the heat dissipation modes selected by the user and the working environment temperature detected by the heat source detection unit, and have the function of protecting the life of the fan, reducing noise and vibration. efficacy.

10‧‧‧temperature control module

20‧‧‧Heat source detection unit

30‧‧‧Power supply module

40‧‧‧Switcher

50‧‧‧fan

M1‧‧‧First cooling mode

M2‧‧‧second cooling mode

M1A‧‧‧ first shift curve

M1B‧‧‧ second shift curve

M2A‧‧‧ first shift curve

M2B‧‧‧ second shift curve

T1‧‧‧ stop temperature

T2‧‧‧ start temperature

T3‧‧‧ stop temperature

T4‧‧‧ start temperature

Tmax‧‧‧max temperature

U1‧‧‧Starting speed

Ulow‧‧‧ minimum speed

Umax‧‧‧Maximum speed

Fig. 1 is a functional block diagram of a known method of controlling the fan speed of a computer power supply and its apparatus.

Fig. 2 is a graph showing the control method of the fan speed of the computer power supply of Fig. 1 and the temperature-fan speed control chart of the device.

Figure 3 is a functional block diagram of an embodiment of a fan speed control device of the present power supply.

Fig. 4 is a flow chart showing the steps of a control method of a fan speed control device in conjunction with the power supply of the present invention.

Figure 5 is the temperature-fan speed control of the fan speed control device of the new power supply. Graph.

First, please refer to FIG. 3, which is a functional block diagram of an embodiment of a fan speed control device of the present power supply.

The embodiment of the fan speed control device of the power supply provided by the present invention comprises: a temperature control module 10, a switch 40, a heat source detecting unit 20 and a power supply module 30, and the temperature control module 10 and the heat source detecting unit 20 and The power supply module 30 is electrically connected, and the heat source detecting unit 20 detects the working environment temperature of the power supply and continuously reports the temperature to the temperature control module 10. The temperature control module 10 includes a first heat dissipation mode for controlling the action and the rotation speed of the fan 50. The M1 and the second heat dissipation mode M2, the temperature control module 10 is electrically connected to the switch 40, and the user can operate the switch 40 to selectively activate any one of the first heat dissipation mode M1 and the second heat dissipation mode M2 according to requirements. The first heat dissipation mode M1 and the second heat dissipation mode M2 control the action and the rotational speed of the fan 50 according to a preset temperature-fan speed control curve (see FIG. 5). Therefore, the temperature control module 10 controls the action of the fan 50 according to one of the heat dissipation modes (the first heat dissipation mode M1 or the second heat dissipation mode M2) selected by the user according to the temperature of the working environment detected by the heat source detection unit 20 ( Contains rotation and stop) and speed.

One embodiment of the temperature control module 10 is a fan drive circuit or module including a control program, such as integrating a fan drive circuit and a system on chip (SoC), and in the system single chip. A control program including the first heat dissipation mode M1 and the second heat dissipation mode M2 is embedded. The embodiment of the switch 40 may be any one of a dial switch, a multi-stage switch, and a push switch.

Please refer to FIG. 4 is a flow chart showing the steps of the embodiment of the control method of the fan speed control device of the power supply of the present invention. The fan speed control of the power supply proposed by the present invention An embodiment of the method includes the steps of: a. detecting a working environment temperature of the power supply; b. starting any one of the first heat dissipation mode M1 and the second heat dissipation mode M2; and c. the working environment obtained according to the detection The temperature and one of the first heat dissipation mode M1 and the second heat dissipation mode M2 that are activated control the action and rotational speed of the fan 50.

The first heat dissipation mode M1 and the second heat dissipation mode M2 control the action and the rotation speed of the fan 50 according to a preset temperature-fan speed control curve, and the implementation of the temperature-fan speed control curve is as shown in FIG. 5, wherein The temperature-fan speed control curves of both the first heat dissipation mode M1 and the second heat dissipation mode M2 include a first shifting curve and a second shifting curve; for convenience of distinction and explanation, the first cooling mode M1 in FIG. 5 A shifting curve and a second shifting curve are shown by solid lines, the first shifting curve and the second shifting curve of the second heat dissipating mode M2 are shown by dashed lines, and M1A represents the first shifting curve of the first heat dissipating mode M1, and M1B indicates a second shifting curve of the heat dissipation mode M1, T2 is the starting temperature of the first heat dissipation mode M1, T1 is the stopping temperature of the first heat dissipation mode M1, wherein the starting temperature T2 is greater than the stopping temperature T1; and M2A represents the second cooling mode M2 a shifting curve, M2B represents a second shifting curve of the second cooling mode M2, T4 is a starting temperature of the second cooling mode M2, and T3 is a stopping temperature of the second cooling mode M2, wherein the starting temperature T4 is greater than The temperature T3 is stopped; wherein the curve patterns of the first heat dissipation mode M1 and the second heat dissipation mode M2 are the same, in other words, the curve shape of the second heat dissipation mode M2 can be regarded as a shift of the first heat dissipation mode M1.

Hereinafter, the first heat dissipation mode M1 is taken as an example to illustrate the action and the rotation speed of the fan 50 in the first heat dissipation mode M1 as follows; as shown in FIG. 5, the temperature control module 10 starts at the startup speed when the working environment temperature is greater than the startup temperature T2. U1 activates the fan 50 and controls the wind according to the first shifting curve M1A The rotational speed of the fan 50, wherein the rotational speed of the fan 50 of the first shifting curve M1A is proportional to the operating temperature, and when the operating temperature reaches the preset maximum temperature Tmax and is greater than the maximum temperature Tmax, the fan 50 is maintained at the maximum speed. Umax rotation, wherein the first heat dissipation mode M1 and the first heat dissipation mode M2 respectively have a preset maximum temperature Tmax; when the working environment temperature drops below the startup temperature T2 but greater than the stop temperature T1, the temperature control module 10 is according to the second The shifting curve M1B controls the rotational speed of the fan 50, wherein the rotational speed of the fan 50 of the second shifting curve M1B is proportional to the operating temperature, and the temperature control module 10 stops the fan 50 when the operating ambient temperature drops below the stopping temperature T1. Preferably, the rotation speed of the fan 50 before stopping is not less than the minimum rotation speed Ulow of the fan 50; wherein the starting temperature T2 of the first heat dissipation mode M1 is lower than the starting temperature T4 of the second heat dissipation mode M2, the first heat dissipation mode M1 The stop temperature T1 is lower than the stop temperature T3 of the second heat dissipation mode M2.

Although the present invention has been disclosed above in the above embodiments, it is not intended to limit the present invention, and the skilled person can make some modifications and retouchings without departing from the spirit and scope of the present invention. The scope of patent protection is subject to the terms of the claims attached to this specification.

10‧‧‧temperature control module

20‧‧‧Heat source detection unit

30‧‧‧Power supply module

40‧‧‧Switcher

50‧‧‧fan

Claims (4)

A fan speed control device for a power supply, comprising: a temperature control module, a switcher, a heat source detecting unit and a power supply module, wherein the temperature control module is electrically connected to the heat source detecting unit and the power supply module respectively, the heat source The detecting unit detects the working environment temperature of the power supply and continuously reports the temperature to the temperature control module, and the temperature control module includes a first heat dissipation mode and a second heat dissipation mode for controlling the action and the rotation speed of the fan, and the temperature control module Electrically connecting the switch, the switch is configured to selectively activate any one of the first heat dissipation mode and the second heat dissipation mode, wherein the first heat dissipation mode and the second heat dissipation mode are based on a preset temperature - The fan speed control curve controls the action and the rotation speed of the fan, wherein the temperature-fan speed control curve of the first heat dissipation mode and the second heat dissipation mode both include a first shifting curve and a second shifting curve, in the working environment When the temperature is greater than the starting temperature, the temperature control module starts the fan and controls the rotation speed of the fan according to the first shifting curve, and reaches the preset maximum temperature at the working temperature. After and after the maximum temperature, the fan will maintain the maximum speed rotation. When the working environment temperature drops below the starting temperature but is greater than the stopping temperature, the temperature control module controls the speed of the fan according to the second shifting curve. The temperature control module stops the rotation of the fan when the working environment temperature drops below the stop temperature, wherein the start temperature is greater than the stop temperature, and the first shifting curve and the second shifting curve are an open upward a curve, wherein the starting temperature of the first heat dissipation mode is lower than the startup temperature of the second heat dissipation mode, and the stop temperature of the first heat dissipation mode is lower than the stop temperature of the second heat dissipation mode. The fan speed control device of the power supply device of claim 1, wherein the speed of the fan in the first shifting curve is proportional to the operating temperature, and the speed and operating temperature of the fan in the second shifting curve are Proportional relationship. The fan speed control device of the power supply of claim 1, wherein the switch is any one of a dip switch, a multi-stage switch, and a push switch. The fan speed control device of the power supply device of claim 1, wherein the speed of the fan before stopping is not less than the minimum speed of the fan.