TWI633240B - Fan speed control method and device for computer power supply - Google Patents
Fan speed control method and device for computer power supply Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
一種電腦電源供應器的風扇轉速控制方法及其裝置,包括:一溫控模組、一熱源檢測單元和一供電模組,溫控模組分別與熱源檢測單元及供電模組電性連接,利用熱源檢測單元檢測電源供應器的工作溫度並持續回報至溫控模組,在工作溫度上升至預設的一啟動溫度時,溫控模組通過包含一預解熱階段、一線性散熱階段和一等速降溫階段的節能散熱模式,控制風扇的動作和轉速,直到工作溫度下降至預設的一停止溫度時停止風扇。 A fan speed control method and device for a computer power supply, comprising: a temperature control module, 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, and utilizes The heat source detecting unit detects the operating temperature of the power supply and continuously returns the temperature to the temperature control module. When the working temperature rises to a preset starting temperature, the temperature control module includes a preheating stage, a linear heat dissipation stage, and a first class. The energy-saving heat-dissipation mode in the rapid cooling phase controls the action and speed of the fan until the operating temperature drops to a preset stop temperature.
Description
本發明涉及一種風扇轉速控制方法及其裝置,特別是一種電腦電源供應器的風扇轉速控制方法及其裝置。 The invention relates to a fan speed control method and device thereof, in particular to a fan speed control method and device thereof for a computer power supply.
為了防止電子裝置或設備因為發熱而產生效率降低或是故障的問題發生,大部分的電子裝置或設備都配置有散熱風扇,早期的散熱風扇通常是以最大轉速運轉,期望能在最短的時間內降低電子裝置或設備的溫度達到最大的散熱效果;透過提高風扇的轉速來提升整體熱對流的散熱效率,加速熱冷空氣的替換,本是理所當然的作法,然而,持續保持風扇的高速運轉下,所產生的則是風扇的提早耗損、持續耗能及噪音問題。 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. Reducing the temperature of the electronic device or device to achieve maximum heat dissipation; improving the heat dissipation efficiency of the overall heat convection by increasing the speed of the fan, and accelerating the replacement of the hot and cold air, is a matter of course, however, while maintaining the high speed operation of the fan, What is produced is the premature wear, continuous energy consumption and noise of the fan.
為了解決上述的問題,依據電子裝置或設備的溫度自動調整風扇的轉速的散熱風扇轉速控制裝置應運而生,如何一方面提供足夠的散熱效率,另一方面又能具備降噪和符合節能環保的要求,則是散熱風扇轉速控制裝置的主要設計目標;如第1圖所示,一種已知的電腦電源供應器的風扇轉速控制裝置主要包括:一控制模組1、一溫度檢測單元2及一供電模組3,其中控制模組1分別和溫度檢測單元2以及供電模組3電性連接,控制模組1直接和一風扇4電性連接;配合第2圖的溫度-風扇轉速控制曲線圖所示,當溫度檢測單元2檢測電腦電源供應器的溫度上升到達第一臨界溫度T1但小於第二臨界溫度T2時,風扇4仍是保持靜止的狀態,在溫度檢測單元2 持續檢測電腦電源供應器的溫度上升到達第二臨界溫度T2,控制模組1開啟供電模組3直接啟動風扇4,並依電腦電源供應器的溫度上升,使其風扇4的轉速隨著溫度上升或下降保持線性關係(意即風扇轉速和溫度和正比升降),直到溫度上升到達最大值Tmax(通常是由廠商決定),風扇將以最大轉速Umax轉動;在溫度因風扇4的散熱作用而使電腦電源供應器的溫度開始下降但還未到達第二臨界溫度T2之前,風扇4的轉速仍與溫度保持線性關係,直到溫度低於第二臨界溫度T2時,將風扇4的轉速降到Ulrpm並保持在該轉速繼續轉動,直到溫度檢測單元2檢測電腦電源供應器的溫度降到第一臨界溫度T1,控制模組1直接將風扇4關閉。 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 , the fan speed control device of a known computer power supply mainly comprises: a control module 1, a temperature detecting unit 2 and a The power supply module 3, wherein the control module 1 is electrically connected to the temperature detecting unit 2 and the power supply module 3, and the control module 1 is directly connected to a fan 4; and the temperature-fan speed control curve of FIG. 2 is matched. As shown, when the temperature detecting unit 2 detects that the temperature rise of the computer power supply reaches the first critical temperature T1 but is less than the second critical temperature T2, the fan 4 remains in a stationary state, and the temperature detecting unit 2 Continuously detecting that the temperature rise of the computer power supply reaches the second critical temperature T2, the control module 1 turns on the power supply module 3 to directly start the fan 4, and according to the temperature rise of the computer power supply, the speed of the fan 4 rises with the temperature. Or the drop maintains a linear relationship (ie fan speed and temperature and proportional lift) until the temperature rise reaches a maximum value Tmax (usually determined by the manufacturer), the fan will rotate at the maximum speed Umax; the temperature is due to the heat dissipation of the fan 4 Before the temperature of the computer power supply starts to drop but has not reached the second critical temperature T2, the speed of the fan 4 remains linear with the temperature until the temperature is lower than the second critical temperature T2, and the speed of the fan 4 is lowered to Ulrpm. The rotation continues until the temperature detecting unit 2 detects that the temperature of the computer power supply drops to the first critical temperature T1, and the control module 1 directly turns off the fan 4.
雖然前述的風扇控制方法可以改善原有習知技術風扇持續最大轉速的耗能、耗損及噪音問題,但是這種風扇轉速的控制方法只有單一種控制模式,在電子裝置或是電腦電源供應器處於不同的負載或是不同的發熱情況之下,不易滿足所需要的散熱效能。 Although the foregoing fan control method can improve the energy consumption, wear and noise problems of the conventional maximum fan speed of the prior art, the fan speed control method has only a single control mode, and is in the electronic device or the computer power supply. Under different load or different heat conditions, it is not easy to meet the required heat dissipation performance.
本發明所要解決的技術問題是提供一種電腦電源供應器的風扇轉速控制方法及其裝置。 The technical problem to be solved by the present invention is to provide a method and device for controlling the fan speed of a computer power supply.
為了解決前述的技術問題,本發明提出的電腦電源供應器的風扇轉速控制方法的第一種實施例,係利用一熱源檢測單元檢測電源供應器的工作溫度並持續回報至一溫控模組,溫控模組依據工作溫度控制風扇的動作和轉速,在工作溫度上升至預設的一啟動溫度時,溫控模組以高於最低轉速的一啟動轉速啟動風扇開始運轉,接著進入一預解熱階段,預解熱階段係在預設的一段第一時間內先將風扇轉速線性降至最低轉速再以最 低轉速維持一段第二時間,然後進入一線性散熱階段,線性散熱階段係在工作溫度上升至高於預解熱階段的終點溫度之後,控制風扇的轉速隨著工作溫度上升或下降保持線性關係的變化,在工作溫度上升到達預設的一最高溫度以及高於最高溫度之後,風扇仍維持最大轉速持續進行散熱,在工作溫度下降至低於預解熱階段的終點溫度時進入一等速降溫階段,在等速降溫階段係控制風扇的轉速維持在最低轉速並持續運轉,直到工作溫度下降至預設的一停止溫度時停止風扇。 In order to solve the foregoing technical problem, the first embodiment of the method for controlling the fan speed of the computer power supply provided by the present invention utilizes a heat source detecting unit to detect the operating temperature of the power supply and continuously report the temperature to a temperature control module. The temperature control module controls the action and the rotation speed of the fan according to the working temperature. When the working temperature rises to a preset starting temperature, the temperature control module starts the fan to start running at a starting speed higher than the minimum speed, and then enters a preheating heat. In the stage, the pre-heating stage first linearly reduces the fan speed to the minimum speed in the first period of the preset period. The low speed is maintained for a second time, and then enters a linear heat dissipation phase. After the operating temperature rises above the end temperature of the preheating phase, the speed of the control fan changes linearly with the rise or fall of the operating temperature. After the working temperature rises to a preset maximum temperature and above the maximum temperature, the fan still maintains the maximum speed for continuous heat dissipation, and enters a constant-speed cooling stage when the working temperature drops below the end temperature of the pre-heating stage, waiting for The speed-down phase controls the fan speed to be maintained at the minimum speed and continues to run until the operating temperature drops to a preset stop temperature.
本發明提出的電腦電源供應器的風扇轉速控制裝置的第一種實施例,包括:一溫控模組、一熱源檢測單元和一供電模組,溫控模組分別與熱源檢測單元及供電模組電性連接,熱源檢測單元用以檢測電源供應器的工作溫度並持續回報至溫控模組,在工作溫度上升至預設的一啟動溫度時,溫控模組通過包含一預解熱階段、一線性散熱階段和一等速降溫階段的節能散熱模式,控制風扇的動作和轉速,直到工作溫度下降至預設的一停止溫度時停止風扇。 The first embodiment of the fan speed control device of the computer power supply provided by the present invention comprises: a temperature control module, a heat source detecting unit and a power supply module, and the temperature control module and the heat source detecting unit and the power supply mode respectively The electrical connection detecting unit is configured to detect the operating temperature of the power supply and continuously report the temperature to the temperature control module. When the working temperature rises to a preset starting temperature, the temperature control module includes a preheating stage, The energy-saving heat-dissipating mode of a linear heat-dissipation phase and a constant-speed cooling phase controls the action and rotation speed of the fan until the operating temperature drops to a preset stop temperature to stop the fan.
本發明提出的電腦電源供應器的風扇轉速控制方法及其裝置的第二種實施例,包含一種以上可選擇的散熱控制模式,其中每一種散熱控制模式的風扇轉速-溫度工作曲線相同或一致,區別在於每一種散熱控制模式的風扇轉速-溫度工作曲線中用以決定風扇啟動的啟動溫度,和決定風扇停止的停止溫度不同;在本發明的一種較佳實施方式包括至少二種可選擇的散熱控制模式,這些散熱控制模式可以分別提供標準和節能等不同的功效。 The second embodiment of the fan speed control method and the apparatus for the computer power supply provided by the present invention includes one or more optional heat dissipation control modes, wherein the fan speed-temperature working curves of each of the heat dissipation control modes are the same or the same. The difference is that the fan speed-temperature operating curve of each heat-dissipation control mode determines the starting temperature of the fan starting, and the stopping temperature that determines the fan stop is different; in a preferred embodiment of the invention, at least two alternative heat dissipations are included. Control mode, these thermal control modes can provide different functions such as standard and energy saving.
本發明提出的電腦電源供應器的風扇轉速控制方法的第二 種實施例,包括:a.利用熱源檢測單元檢測電腦電源供應器的工作溫度;b.在一標準散熱模式和至少一節能散熱模式中選擇其中一種散熱控制模式;以及c.依據檢測獲得的工作溫度和被啟用的散熱控制模式,透過一溫控模組控制風扇的動作執行散熱工作。 The second method for controlling the fan speed of the computer power supply provided by the present invention Embodiments include: a. detecting a working temperature of the computer power supply by using a heat source detecting unit; b. selecting one of the heat dissipation modes in a standard heat dissipation mode and at least one energy saving heat dissipation mode; and c. obtaining work according to the detection The temperature and the enabled thermal control mode perform heat dissipation through a temperature control module that controls the action of the fan.
其中標準散熱模式係在電腦電源供應器開始工作時,以一第一電壓啟動風扇使風扇在高於最低轉速的一啟動轉速開始運轉,接著進入一預解熱階段,預解熱階段係在預設的一段第一時間內先將風扇轉速線性降至最低轉速再以最低轉速維持一段第二時間,然後進入一線性散熱階段,線性散熱階段係在工作溫度上升至高於預解熱階段的終點溫度之後,控制風扇的轉速隨著工作溫度上升或下降保持線性關係的變化,在工作溫度上升到達預設的一最高溫度以及高於最高溫度之後,風扇仍維持最大轉速持續進行散熱,在工作溫度下降至低於預解熱階段的終點溫度時進入一等速降溫階段,在等速降溫階段係控制風扇的轉速維持在最低轉速並持續運轉,直到工作溫度下降至預設的一停止溫度時停止風扇。 The standard cooling mode is when the computer power supply starts to work, the fan is started at a first voltage to start the fan at a starting speed higher than the minimum speed, and then enters a pre-heating stage, and the pre-heating stage is preset. The first time, the fan speed is linearly reduced to the minimum speed and then maintained at the minimum speed for a second time, and then enters a linear heat dissipation phase. The linear heat dissipation phase is controlled after the operating temperature rises above the end temperature of the preheating phase. The speed of the fan maintains a linear relationship as the operating temperature rises or falls. After the operating temperature rises to a preset maximum temperature and above the maximum temperature, the fan maintains the maximum speed for continuous heat dissipation, and the operating temperature drops below The end temperature of the preheating stage enters a constant-speed cooling stage. During the constant-speed cooling stage, the fan speed is controlled to be maintained at the minimum speed and continues to operate until the operating temperature drops to a preset stop temperature.
其中節能散熱模式係在電腦電源供應器的工作溫度上升至預設的一啟動溫度時以一第一電壓啟動風扇使風扇在高於最低轉速的一啟動轉速開始運轉,接著進入一預解熱階段,預解熱階段包含一減速階段和一等速階段,其中減速階段係在預設的一段第一時間從啟動轉速線性降低至最低轉速之後進入等速階段,等速階段係以最低轉速持續運轉預設的一段第二時間,在包含減速階段和等速階段的預解熱階段進行預解熱,在工 作溫度上升至高於預解熱階段的終點溫度之後進入一線性散熱階段,在線性散熱階段的風扇的轉速隨著工作溫度上升或下降保持線性關係的變化,在工作溫度上升到達預設的一最高溫度,風扇的轉速亦到達最大轉速,在工作溫度高於最高溫度之後,風扇的轉速仍維持在最大轉速持續進行散熱,在工作溫度下降至低於預解熱階段的終點溫度,風扇的轉速維持在最低轉速並持續運轉,直到工作溫度下降至一停止溫度時停止風扇。 The energy-saving heat-dissipating mode starts the fan at a first voltage when the operating temperature of the computer power supply rises to a preset starting temperature, and then starts the fan at a starting speed higher than the minimum speed, and then enters a pre-heating stage. The pre-heating phase includes a deceleration phase and a constant velocity phase, wherein the deceleration phase enters the constant velocity phase after linearly decreasing from the startup rotational speed to the minimum rotational speed for a predetermined period of time, and the constant velocity phase is continuously operated at the minimum rotational speed. For the second time, pre-heating is carried out in the pre-heating stage including the deceleration phase and the constant velocity phase. After the temperature rises to a temperature higher than the end temperature of the preheating stage, a linear heat dissipation phase is entered, and the speed of the fan in the linear heat dissipation phase maintains a linear relationship with the rise or fall of the operating temperature, and reaches a preset maximum temperature when the operating temperature rises. The fan speed also reaches the maximum speed. After the working temperature is higher than the maximum temperature, the fan speed is maintained at the maximum speed for continuous heat dissipation. When the operating temperature drops below the end temperature of the preheating stage, the fan speed is kept at a minimum. The speed continues to run until the operating temperature drops to a stop temperature and stops the fan.
在一方面,本發明的提出的電腦電源供應器的風扇轉速控制方法的一種實施例,包括:所述的標準散熱模式、一第一節能散熱模式和一第二節能散熱模式;其中第一節能散熱模式和第二節能散熱模式的風扇轉速-溫度工作曲線相同或一致,區別在於第一節能散熱模式和第二節能散熱模式的風扇轉速-溫度工作曲線中用以決定風扇啟動的啟動溫度,和決定風扇停止的停止溫度不同。 In one aspect, an embodiment of the fan speed control method of the computer power supply of the present invention includes: the standard heat dissipation mode, a first energy-saving heat dissipation mode, and a second energy-saving heat dissipation mode; wherein the first energy saving The fan speed-temperature working curve of the heat dissipation mode and the second energy-saving heat dissipation mode are the same or the same, and the difference is the start temperature of the fan speed-temperature working curve of the first energy-saving heat-dissipation mode and the second energy-saving heat-dissipation mode for determining the fan start, and It is determined that the stop temperature of the fan stop is different.
本發明提出的電腦電源供應器的風扇轉速控制裝置的第二種實施例,包括:一溫控模組、一熱源檢測單元和一供電模組,溫控模組分別與熱源檢測單元及供電模組電性連接,熱源檢測單元用以檢測電源供應器的工作溫度並持續回報至溫控模組,溫控模組具有至少二種的散熱控制模式,溫控模組電性連接一開關元件用以選擇性地啟用其中任一種散熱控制模式,溫控模組依據檢測獲得的工作溫度和被啟用的散熱控制模式控制風扇的動作和轉速執行散熱工作,所述散熱控制模式包含一標準散熱模式和至少一節能散熱模式。 The second embodiment of the fan speed control device of the computer power supply provided by the present invention comprises: a temperature control module, a heat source detecting unit and a power supply module, and the temperature control module and the heat source detecting unit and the power supply mode respectively The electrical connection detecting unit is configured to detect the operating temperature of the power supply and continuously report the temperature to the temperature control module. The temperature control module has at least two heat dissipation control modes, and the temperature control module is electrically connected to a switching component. To selectively enable any of the heat dissipation control modes, the temperature control module performs a heat dissipation operation according to the detected operating temperature and the enabled heat dissipation control mode to control the operation and speed of the fan, the heat dissipation control mode includes a standard heat dissipation mode and At least one energy saving mode.
在一方面,本發明提出的電腦電源供應器的風扇轉速控制裝置的第二種實施例,其中的散熱模式包括:一標準散熱模式、一第一節能 散熱模式和一第二節能散熱模式;其中第一節能散熱模式和第二節能散熱模式的風扇轉速-溫度工作曲線相同或一致,區別在於第一節能散熱模式和第二節能散熱模式的風扇轉速-溫度工作曲線中用以決定風扇啟動的啟動溫度,和決定風扇停止的停止溫度不同。 In one aspect, the second embodiment of the fan speed control device of the computer power supply provided by the present invention, wherein the heat dissipation mode comprises: a standard heat dissipation mode, and a first energy saving The heat dissipation mode and the second energy-saving heat dissipation mode; wherein the fan speed-temperature operation curve of the first energy-saving heat dissipation mode and the second energy-saving heat dissipation mode are the same or the same, and the difference is the fan speed of the first energy-saving heat dissipation mode and the second energy-saving heat dissipation mode- The starting temperature used to determine the fan start in the temperature operating curve is different from the stopping temperature that determines the fan stop.
其中係以一第二電壓驅動風扇在最低轉速運轉,所述第一電壓為5.0伏特(V),第二電壓為3.5伏特(V)。 The fan is operated at a minimum speed with a second voltage, the first voltage being 5.0 volts (V) and the second voltage being 3.5 volts (V).
其中標準散熱模式的停止溫度為25℃~30℃,最高溫度為65℃~75℃。 The standard heat dissipation mode has a stop temperature of 25 ° C to 30 ° C and a maximum temperature of 65 ° C to 75 ° C.
其中第二節能散熱模式的啟動溫度高於第一節能散熱模式的啟動溫度,第二節能散熱模式的停止溫度高於第一節能散熱模式的停止溫度,第二節能散熱模式的停止溫度介於第一節能散熱模式的啟動溫度和停止溫度之間。 The startup temperature of the second energy-saving heat dissipation mode is higher than the startup temperature of the first energy-saving heat dissipation mode, the stop temperature of the second energy-saving heat dissipation mode is higher than the stop temperature of the first energy-saving heat dissipation mode, and the stop temperature of the second energy-saving heat dissipation mode is between An energy-saving cooling mode between the start temperature and the stop temperature.
其中第二節能散熱模式的啟動溫度為55℃~65℃,第二節能散熱模式的停止溫度為40℃~50℃。 The starting temperature of the second energy-saving heat-dissipating mode is 55°C~65°C, and the stopping temperature of the second energy-saving heat-dissipating mode is 40°C~50°C.
其中減速階段的預設的一段第一時間為15~25秒。其中等速階段的預設的一段第二時間為1~10秒。 The preset first period of the deceleration phase is 15 to 25 seconds. The preset second period of the constant speed phase is 1 to 10 seconds.
其中開關元件包括指撥開關、多段式切換開關和按壓式切換開關其中的任一種。 The switching element includes any one of a finger switch, a multi-stage switch, and a push switch.
10‧‧‧溫控模組 10‧‧‧temperature control module
20‧‧‧熱源檢測單元 20‧‧‧Heat source detection unit
30‧‧‧供電模組 30‧‧‧Power supply module
40‧‧‧風扇 40‧‧‧Fan
41‧‧‧風扇控制單元 41‧‧‧Fan control unit
P1、P4‧‧‧預解熱階段 P1, P4‧‧‧ preheating stage
P2、P5‧‧‧線性散熱階段 P2, P5‧‧‧ linear cooling stage
P3、P6‧‧‧等速降溫階段 P3, P6‧‧‧ constant temperature cooling stage
P1-1‧‧‧減速階段 P1-1‧‧‧Deceleration phase
P1-2‧‧‧等速階段 P1-2‧‧‧ constant speed stage
T0‧‧‧初始溫度 T0‧‧‧ initial temperature
T1、T3、T5‧‧‧啟動溫度 T1, T3, T5‧‧‧ start temperature
T2、T4、T6‧‧‧停止溫度 T2, T4, T6‧‧‧ stop temperature
Tend1、Tend2‧‧‧預解熱階段的終點溫度 End temperature of Tend1, Tend2‧‧‧ preheating stage
Tmax‧‧‧最高溫度 Tmax‧‧‧max temperature
U‧‧‧啟動轉速 U‧‧‧Starting speed
Ulow‧‧‧最低轉速 Ulow‧‧‧ minimum speed
Umax‧‧‧最大轉速 Umax‧‧‧Maximum speed
V1‧‧‧第一電壓 V1‧‧‧ first voltage
V2‧‧‧第二電壓 V2‧‧‧second voltage
第1圖是已知的電腦電源供應器的風扇轉速控制裝置的功能方塊圖。 Figure 1 is a functional block diagram of a known fan speed control device for a computer power supply.
第2圖是第1圖的電腦電源供應器的風扇轉速控制裝置的溫度-風扇轉速 控制曲線圖。 Figure 2 is the temperature-fan speed of the fan speed control device of the computer power supply of Figure 1. Control the graph.
第3圖是本發明電腦電源供應器的風扇轉速控制方法的第一種實施例的步驟流程圖。 Fig. 3 is a flow chart showing the steps of the first embodiment of the method for controlling the fan speed of the computer power supply of the present invention.
第4圖是本發明電腦電源供應器的風扇轉速控制裝置的第一種實施例的功能方塊圖。 Figure 4 is a functional block diagram showing a first embodiment of the fan speed control device of the computer power supply of the present invention.
第5圖是本發明電腦電源供應器的風扇轉速控制方法的第一種實施例的溫度-風扇轉速控制曲線圖。 Fig. 5 is a graph showing the temperature-fan speed control curve of the first embodiment of the fan speed control method of the computer power supply of the present invention.
第6圖是本發明電腦電源供應器的風扇轉速控制方法的第二種實施例的步驟流程圖。 Figure 6 is a flow chart showing the steps of a second embodiment of the method for controlling the fan speed of the computer power supply of the present invention.
第7圖是本發明電腦電源供應器的風扇轉速控制裝置的第二種實施例的功能方塊圖。 Figure 7 is a functional block diagram showing a second embodiment of the fan speed control device of the computer power supply of the present invention.
第8圖是本發明電腦電源供應器的風扇轉速控制方法的第二種實施例的溫度-風扇轉速控制曲線圖。 Figure 8 is a graph showing the temperature-fan speed control curve of the second embodiment of the fan speed control method of the computer power supply of the present invention.
第9圖是本發明電腦電源供應器的風扇轉速控制方法及其裝置的第二種實施例的各種散熱控制模式的動作流程圖。 Figure 9 is a flow chart showing the operation of various heat dissipation control modes of the second embodiment of the fan speed control method and apparatus of the computer power supply of the present invention.
第10是本發明電腦電源供應器的風扇轉速控制方法的第三種實施例的溫度-風扇轉速控制曲線圖。 The tenth is a temperature-fan speed control graph of the third embodiment of the fan speed control method of the computer power supply of the present invention.
首先請參閱第3圖和第5圖是本發明電腦電源供應器的風扇轉速控制方法的第一種實施例的步驟流程圖,以及溫度-風扇轉速控制曲線圖;本發明電腦電源供應器的風扇轉速控制方法的第一種實施例的步驟包括: a.檢測電源供應器的工作溫度;b.檢測電源供應器的工作溫度上升至預設的一啟動溫度(T1)時,以高於最低轉速(Ulow)的一啟動轉速(U)啟動風扇40開始運轉;c.進入一預解熱階段(P1),在預設的一段第一時間內先將風扇40的轉速線性降至最低轉速(Ulow),再以最低轉速(Ulow)維持一段第二時間,以達到節能省電之目的;較佳地,其中第一時間為15~25秒,其中第二時間為1~10秒;d.進入一線性散熱階段(P2),持續檢測電源供應器的工作溫度,在工作溫度上升至高於預解熱階段的終點溫度(Tend)之後,控制風扇40的轉速隨著工作溫度上升或下降保持線性關係的變化,在工作溫度上升到達預設的一最高溫度(Tmax),風扇40的轉速亦到達最大轉速(Umax);e.持續檢測電源供應器的工作溫度,在工作溫度上升到達預設的一最高溫度(Tmax)以及高於最高溫度(Tmax)之後,風扇40仍維持最大轉速(Umax)持續進行散熱;f.持續檢測電源供應器的工作溫度,在工作溫度下降至低於預解熱階段的終點溫度(Tend)時進入一等速降溫階段(P3),在等速降溫階段(P3)係控制風扇40的轉速維持在最低轉速(Ulow)並持續運轉;以及g.持續檢測電源供應器的工作溫度,在工作溫度下降至預設的一停止溫度(T2)時停止風扇40;較佳地,其中停止溫度為25℃~50℃,最高溫度(Tmax)為65℃~75℃,啟動溫度(T1)介於停止溫度(T2)和最高溫度(Tmax)之間。 First, please refer to FIG. 3 and FIG. 5 is a flow chart of the steps of the first embodiment of the fan speed control method of the computer power supply of the present invention, and a temperature-fan speed control graph; the fan of the computer power supply of the present invention The steps of the first embodiment of the rotational speed control method include: a. detecting the operating temperature of the power supply; b. detecting that the operating temperature of the power supply rises to a preset starting temperature (T1), starting the fan 40 with a starting speed (U) higher than the minimum speed (Ulow) Start running; c. enter a pre-heating stage (P1), first linearly reduce the speed of the fan 40 to the minimum speed (Ulow) in the first period of the preset period, and then maintain the second time at the lowest speed (Ulow) In order to achieve energy saving and power saving; preferably, the first time is 15~25 seconds, wherein the second time is 1~10 seconds; d. enters a linear heat dissipation stage (P2), continuously detecting the power supply The operating temperature, after the operating temperature rises above the end temperature (Tend) of the preheating stage, the speed of the control fan 40 maintains a linear relationship as the operating temperature rises or falls, and reaches a preset maximum temperature when the operating temperature rises ( Tmax), the speed of the fan 40 also reaches the maximum speed (Umax); e. continuously detects the operating temperature of the power supply, after the operating temperature rises to a preset maximum temperature (Tmax) and above the maximum temperature (Tmax), Fan 40 still maintains the maximum turn (Umax) continuously heats up; f. continuously detects the operating temperature of the power supply, and enters a constant-speed cooling stage (P3) when the operating temperature drops below the end temperature (Tend) of the pre-heating stage, in the constant-speed cooling stage (P3) is to control the rotation speed of the fan 40 to be maintained at the minimum rotation speed (Ulow) and continue to operate; and g. continuously detect the operating temperature of the power supply, and stop the fan 40 when the operating temperature drops to a preset stop temperature (T2) Preferably, wherein the stop temperature is 25 ° C ~ 50 ° C, the maximum temperature (Tmax) is 65 ° C ~ 75 ° C, the start temperature (T1) is between the stop temperature (T2) and the highest temperature (Tmax).
請參閱第4圖,是本發明電腦電源供應器的風扇轉速控制裝置的第一種實施例的功能方塊圖。用以依據第3圖的風扇轉速控制方法控制 風扇的動作和轉速。本發明電腦電源供應器的風扇轉速控制裝置的第一種實施例構造包括:一溫控模組10、一熱源檢測單元20和一供電模組30。溫控模組10分別與熱源檢測單元20和供電模組30電性連接,熱源檢測單元20用以檢測電源供應器的工作溫度並持續回報至溫控模組10,在工作溫度上升至預設的一啟動溫度(T1)時,溫控模組10通過包含前述的預解熱階段(P1)、線性散熱階段(P2)和等速降溫階段(P3)的節能散熱模式,控制一風扇40的動作和轉速,直到工作溫度下降至預設的一停止溫度(T2)時停止風扇;較佳地,停止溫度(T2)小於啟動溫度(T1)。 Referring to Figure 4, there is shown a functional block diagram of a first embodiment of a fan speed control device for a computer power supply of the present invention. Used to control the fan speed control method according to FIG. Fan action and speed. The first embodiment of the fan speed control device of the computer power supply of the present invention comprises a temperature control module 10, a heat source detecting unit 20 and a power supply module 30. The temperature control module 10 is electrically connected to the heat source detecting unit 20 and the power supply module 30 respectively. The heat source detecting unit 20 is configured to detect the operating temperature of the power supply and continuously report the temperature to the temperature control module 10, and the operating temperature rises to a preset. At a startup temperature (T1), the temperature control module 10 controls the operation of a fan 40 by including an energy-saving heat dissipation mode including a preheating phase (P1), a linear heat dissipation phase (P2), and a constant velocity cooling phase (P3) described above. And the rotational speed until the operating temperature drops to a preset stop temperature (T2) to stop the fan; preferably, the stop temperature (T2) is less than the start temperature (T1).
其中溫控模組10分別與熱源檢測單元20及供電模組30電性連接,熱源檢測單元20用以檢測電源供應器的工作溫度並持續回報至溫控模組10,熱源檢測單元20可以是一種熱敏電阻;溫控模組10係用於控制風扇40的動作,一般而言,風扇40係由一種風扇控制單元41驅動運轉,溫控模組10和風扇控制單元41電性連接,風扇控制單元41依據溫控模組10的控制命令驅動風扇40動作;供電模組30的一種實施方式可以是電腦電源供應器(power supply),電腦電源供應器除了可以提供電腦系統運行需要的電力,亦同時供給溫控模組10、熱源檢測單元20和風扇40需要的電力,較佳地,供電模組30提供不同電壓的電力進而透過溫控模組10控制風扇40的轉速,包括:以一第一電壓(V1)啟動風扇40使風扇40在高於最低轉速(Ulow)的一啟動轉速(U)開始運轉,和以一第二電壓(V2)驅動風扇40在最低轉速運(Ulow)轉,所述第一電壓(V1)為5.0伏特(V),第二電壓(V2)為3.5伏特(V)。 The temperature control module 10 is electrically connected to the heat source detecting unit 20 and the power supply module 30 respectively. The heat source detecting unit 20 is configured to detect the operating temperature of the power supply and continuously report the temperature to the temperature control module 10. The heat source detecting unit 20 may be A thermistor; the temperature control module 10 is used to control the operation of the fan 40. Generally, the fan 40 is driven by a fan control unit 41, and the temperature control module 10 and the fan control unit 41 are electrically connected to each other. The control unit 41 drives the fan 40 according to the control command of the temperature control module 10; one embodiment of the power supply module 30 may be a computer power supply, and the computer power supply may provide power required for the operation of the computer system. At the same time, the power required by the temperature control module 10, the heat source detecting unit 20, and the fan 40 is also supplied. Preferably, the power supply module 30 provides power of different voltages and then controls the speed of the fan 40 through the temperature control module 10, including: The first voltage (V1) activates the fan 40 to cause the fan 40 to start operating at a starting speed (U) above the minimum speed (Ulow), and to drive the fan 40 at the lowest speed with a second voltage (V2) (Ulo w) Turn, the first voltage (V1) is 5.0 volts (V) and the second voltage (V2) is 3.5 volts (V).
請參閱第6圖和第8圖是本發明電腦電源供應器的風扇轉速控制方法的第二種實施例的步驟流程圖,以及溫度-風扇轉速控制曲線圖; 本發明電腦電源供應器的風扇轉速控制方法的第二種實施例的步驟包括:1.檢測電腦電源供應器的工作溫度;2.在一標準散熱模式和至少一節能散熱模式中選擇其中一種散熱控制模式;以及3.檢測電源供應器的工作溫度並且依據被選用的散熱控制模式,控制風扇40的動作執行散熱工作。 Please refer to FIG. 6 and FIG. 8 for a flow chart of the second embodiment of the fan speed control method of the computer power supply of the present invention, and a temperature-fan speed control curve diagram; The second embodiment of the method for controlling the fan speed of the computer power supply of the present invention comprises: 1. detecting the operating temperature of the computer power supply; 2. selecting one of the heat dissipation modes and at least one energy saving mode. The control mode; and 3. detecting the operating temperature of the power supply and controlling the action of the fan 40 to perform the heat dissipation operation according to the selected heat dissipation control mode.
請參閱第9圖,是本發明電腦電源供應器的風扇轉速控制方法及其裝置的第二種實施例的二種散熱控制模式的動作流程圖。 Please refer to FIG. 9 , which is a motion flow chart of two heat dissipation control modes of the second embodiment of the fan speed control method and the apparatus of the computer power supply of the present invention.
其中標準散熱模式係在電腦電源供應器開始工作時,以一第一電壓(V1)啟動風扇40使風扇40在高於最低轉速(Ulow)的一啟動轉速(U)開始運轉,接著進入一預解熱階段(P1),預解熱階段(P1)係在預設的一段第一時間內先將風扇40的轉速線性降至最低轉速(Ulow)再以最低轉速(Ulow)維持一段第二時間,然後進入一線性散熱階段(P2),線性散熱階段(P2)係在工作溫度上升至高於預解熱階段(P1)的終點溫度(Tend1)之後,控制風扇40的轉速隨著工作溫度上升或下降保持線性關係的變化,在工作溫度上升到達預設的一最高溫度(Tmax)以及高於最高溫度(Tmax)之後,風扇40仍維持最大轉速(Umax)持續進行散熱,在工作溫度下降至低於預解熱階段(P1)的終點溫度(Tend1)時進入一等速降溫階段(P3),在等速降溫階段(P3)係控制風扇40的轉速維持在最低轉速(Ulow)並持續運轉,直到工作溫度下降至預設的一停止溫度時停止風扇40,在本發明的一實施方式,其中標準散熱模式的停止溫度可以是風扇轉速-溫度的動作曲線中的初始溫度(T0)。 The standard heat dissipation mode starts when the computer power supply starts to operate, and starts the fan 40 with a first voltage (V1) to start the fan 40 at a starting speed (U) higher than the minimum speed (Ulow), and then enters a pre-start. In the anti-heating phase (P1), the pre-heating phase (P1) first linearly reduces the speed of the fan 40 to the minimum speed (Ulow) and then at the minimum speed (Ulow) for a second time in a predetermined period of time, then Entering a linear heat dissipation phase (P2), the linear heat dissipation phase (P2) controls the fan 40 to maintain linearity as the operating temperature rises or falls after the operating temperature rises above the end temperature (Tend1) of the preheating phase (P1). The relationship changes, after the working temperature rises to a preset maximum temperature (Tmax) and above the maximum temperature (Tmax), the fan 40 still maintains the maximum speed (Umax) for continuous heat dissipation, and the operating temperature drops below the preheating heat. At the end temperature (Tend1) of the phase (P1), the temperature enters the first constant temperature cooling phase (P3), and in the constant temperature cooling phase (P3), the speed of the fan 40 is controlled to be maintained at the minimum speed (Ulow) and continues to operate until the operating temperature drops. Preset Stops the fan 40 is stopped when the temperature in one embodiment of the present invention, wherein the stopping criteria may be a cooling mode the fan speed temperature - initial temperature of the temperature profile in the operation (T0).
其中係以一第二電壓驅動風扇40在最低轉速(Ulow)運轉,所 述第一電壓(V1)為5.0伏特(V),第二電壓(V2)為3.5伏特(V)。其中,風扇轉速-溫度的動作曲線中的初始溫度(T0),可以是電源供應器在有負載下的最低工作溫度,也可以是電源供應器穩定供電狀態的最低工作溫度,在另一方面初始溫度(T0)也可以是室溫或常溫(25℃~30℃)。較佳地,標準散熱模式的停止溫度為25℃~30℃,最高溫度(Tmax)為65℃~75℃。 Wherein the fan 40 is driven at a minimum speed (Ulow) by a second voltage. The first voltage (V1) is 5.0 volts (V) and the second voltage (V2) is 3.5 volts (V). Wherein, the initial temperature (T0) in the fan speed-temperature action curve may be the lowest operating temperature of the power supply under load, or the minimum operating temperature of the power supply stable supply state, on the other hand, the initial The temperature (T0) may also be room temperature or normal temperature (25 ° C to 30 ° C). Preferably, the standard heat dissipation mode has a stop temperature of 25 ° C to 30 ° C and a maximum temperature (Tmax ) of 65 ° C to 75 ° C.
其中節能散熱模式係在電腦電源供應器的工作溫度上升至預設的一啟動溫度(T3)時以一第一電壓(V1)啟動風扇40使風扇40在高於最低轉速(Ulow)的一啟動轉速(U)開始運轉,接著進入一預解熱階段(P4),預解熱階段(P4)包含一減速階段(P4-1)和一等速階段(P4-2),其中減速階段(P4-1)係在預設的一段第一時間從啟動轉速(U)線性降低至最低轉速(Ulow)之後進入等速階段(P4-2),等速階段(P4-2)係以最低轉速(Ulow)持續運轉預設的一段第二時間,在包含減速階段(P4-1)和等速階段(P4-2)的預解熱階段(P4)進行預解熱,在工作溫度上升至高於預解熱階段(P4)的終點溫度(Tend2)之後進入一線性散熱階段(P5),在線性散熱階段(P5)的風扇40的轉速隨著工作溫度上升或下降保持線性關係的變化,在工作溫度上升到達預設的一最高溫度(Tmax),風扇40的轉速亦到達最大轉速(Umax),在工作溫度高於最高溫度(Tmax)之後,風扇40的轉速仍維持在最大轉速(Umax)持續進行散熱,在工作溫度下降至低於預解熱階段(P4)的終點溫度(Tend2)時進入一等速降溫階段(P6),在等速降溫階段(P6)係控制風扇40的轉速維持在最低轉速(Ulow)並持續運轉,直到工作溫度下降至一停止溫度(T4)時停止風扇40。其中節能散熱模式的啟動溫度(T3)介於標準散熱模式的停止溫度和最高溫度(Tmax)之間,較佳地,節能散熱模式的停止溫度(T4)小於啟動溫度(T3)。較 佳地,其中最高溫度(Tmax)為65℃~75℃。較佳地,其中減速階段(P1-1)的預設的一段第一時間為15~25秒,其中等速階段(P1-2)的預設的一段第二時間為1~10秒。 The energy-saving heat-dissipating mode starts the fan 40 at a first voltage (V1) when the operating temperature of the computer power supply rises to a preset starting temperature (T3), so that the fan 40 starts at a higher speed than the minimum speed (Ulow). The speed (U) starts to run, and then enters a preheating phase (P4). The preheating phase (P4) includes a deceleration phase (P4-1) and a constant velocity phase (P4-2), wherein the deceleration phase (P4-1) ) enters the constant speed phase (P4-2) after a linear decrease from the starting speed (U) to the minimum speed (Ulow) at the first time of the preset period, and the constant speed (P4-2) is the lowest speed (Ulow) The second period of continuous operation is pre-heated in the pre-heating stage (P4) including the deceleration phase (P4-1) and the constant velocity phase (P4-2), and the operating temperature rises above the preheating phase (P4). After the end temperature (Tend2) enters a linear heat dissipation phase (P5), the speed of the fan 40 in the linear heat dissipation phase (P5) maintains a linear relationship with the rise or fall of the operating temperature, and the operating temperature rises to a preset state. At the highest temperature (Tmax), the speed of the fan 40 also reaches the maximum speed (Umax), and the operating temperature is higher than the maximum temperature (T After max), the speed of the fan 40 is maintained at the maximum speed (Umax) for continuous heat dissipation, and enters a constant-speed cooling stage (P6) when the operating temperature drops below the end temperature (Tend2) of the pre-heating stage (P4). In the constant-speed cooling phase (P6), the rotational speed of the control fan 40 is maintained at the minimum rotational speed (Ulow) and continues to operate until the operating temperature drops to a stop temperature (T4). The startup temperature (T3) of the energy-saving heat dissipation mode is between the stop temperature and the maximum temperature (Tmax) of the standard heat dissipation mode. Preferably, the stop temperature (T4) of the energy-saving heat dissipation mode is smaller than the startup temperature (T3). More Good, where the maximum temperature (Tmax) is 65 ° C ~ 75 ° C. Preferably, the preset first period of the deceleration phase (P1-1) is 15 to 25 seconds, and the preset second period of the constant velocity phase (P1-2) is 1 to 10 seconds.
請參閱第7圖,是本發明電腦電源供應器的風扇轉速控制裝置的第二種實施例的功能方塊圖。用以依據第6圖的風扇轉速控制方法控制風扇的動作和轉速。本發明電腦電源供應器的風扇轉速控制裝置的第二種實施例構造包括:一溫控模組10、一熱源檢測單元20和一供電模組30,溫控模組10分別與熱源檢測單元20及供電模組30電性連接,熱源檢測單元20用以檢測電源供應器的工作溫度並持續回報至溫控模組10,溫控模組10具有至少二種的散熱控制模式,溫控模組10電性連接一開關元件50用以選擇性地啟用其中任一種散熱控制模式,溫控模組10依據檢測獲得的工作溫度和被啟用的散熱控制模式控制風扇40的動作和轉速執行散熱工作,所述散熱控制模式包含一標準散熱模式和至少一節能散熱模式。其中,標準散熱模式和前述本發明電腦電源供應器的風扇轉速控制方法的第二種實施例的標準散熱模式相同;其中節能散熱模式和前述本發明電腦電源供應器的風扇轉速控制方法的第二種實施例的節能散熱模式相同。 Please refer to FIG. 7, which is a functional block diagram of a second embodiment of the fan speed control device of the computer power supply of the present invention. It is used to control the action and the rotational speed of the fan according to the fan speed control method of FIG. The second embodiment of the fan speed control device of the computer power supply of the present invention comprises: a temperature control module 10, 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, respectively. The power supply module 30 is electrically connected, and the heat source detecting unit 20 is configured to detect the operating temperature of the power supply and continuously report the temperature to the temperature control module 10. The temperature control module 10 has at least two types of heat dissipation control modes, and the temperature control module 10 electrically connecting a switching element 50 for selectively enabling any one of the heat dissipation control modes, and the temperature control module 10 performs the heat dissipation operation according to the detected operating temperature and the enabled heat dissipation control mode to control the action and the rotation speed of the fan 40. The heat dissipation control mode includes a standard heat dissipation mode and at least one energy saving heat dissipation mode. The standard heat dissipation mode is the same as the standard heat dissipation mode of the second embodiment of the fan speed control method of the computer power supply of the present invention; wherein the energy-saving heat dissipation mode and the second method of controlling the fan speed of the computer power supply of the present invention are the second The energy-saving heat dissipation modes of the embodiments are the same.
溫控模組10具有一種以上可供使用者選擇後啟用的散熱控制模式,較佳地,溫控模組10是一種可以運行溫度控制程序的溫度控制晶片,所述的散熱控制模式可以透過運行不同的溫度控制程序實現;溫控模組10電性連接一開關元件50用以供使用者選擇性地啟用其中任一種散熱控制模式,其中開關元件50包括指撥開關、多段式切換開關和按壓式切換開關其中的任一種。 The temperature control module 10 has more than one heat dissipation control mode that can be selected by the user. Preferably, the temperature control module 10 is a temperature control chip that can run a temperature control program, and the heat dissipation control mode can be operated through Different temperature control programs are implemented; the temperature control module 10 is electrically connected to a switching element 50 for the user to selectively enable any one of the heat dissipation control modes, wherein the switching element 50 includes a dip switch, a multi-stage switch, and a push type Switch any of them.
在一方面,本發明提出的電腦電源供應器的風扇轉速控制裝置的第三種實施例,其中的散熱模式包括:一標準散熱模式、一第一節能散熱模式和一第二節能散熱模式;這三種散熱模式的溫度-風扇轉速控制曲線圖請參閱第10圖;其中第一節能散熱模式和第二節能散熱模式對於風扇40的控制方式都和前述的風扇轉速控制方法的第二種實施例的節能散熱模式相同,而且第一節能散熱模式和第二節能散熱模式的風扇轉速-溫度工作曲線相同或一致,區別在於第一節能散熱模式和第二節能散熱模式的風扇轉速-溫度工作曲線中用以決定風扇40啟動的啟動溫度,和決定風扇40停止的停止溫度不同。其中第二節能散熱模式的啟動溫度(T5)高於第一節能散熱模式的啟動溫度(T3),第二節能散熱模式的停止溫度(T6)高於第一節能散熱模式的停止溫度(T4),第二節能散熱模式的停止溫度(T6)介於第一節能散熱模式的啟動溫度(T3)和停止溫度(T4)之間。較佳地,其中第二節能散熱模式的啟動溫度(T5)為55℃~65℃,第二節能散熱模式的停止溫度(T6)為40℃~50℃。 In a third aspect, the third embodiment of the fan speed control device of the computer power supply provided by the present invention includes: a standard heat dissipation mode, a first energy-saving heat dissipation mode, and a second energy-saving heat dissipation mode; For the temperature-fan speed control curve of the three heat dissipation modes, refer to FIG. 10; wherein the first energy-saving heat dissipation mode and the second energy-saving heat dissipation mode control the fan 40 and the second embodiment of the fan speed control method described above. The energy-saving heat dissipation mode is the same, and the fan speed-temperature working curve of the first energy-saving heat-dissipating mode and the second energy-saving heat-dissipating mode are the same or the same, and the difference is that the fan-speed-temperature working curve of the first energy-saving heat-dissipating mode and the second energy-saving heat-dissipating mode are used. The starting temperature for determining the start of the fan 40 is different from the stopping temperature for determining the stop of the fan 40. The starting temperature (T5) of the second energy-saving heat-dissipating mode is higher than the starting temperature (T3) of the first energy-saving heat-dissipating mode, and the stopping temperature (T6) of the second energy-saving heat-dissipating mode is higher than the stopping temperature of the first energy-saving heat-dissipating mode (T4) The stop temperature (T6) of the second energy-saving heat dissipation mode is between the start temperature (T3) and the stop temperature (T4) of the first energy-saving heat dissipation mode. Preferably, the starting temperature (T5) of the second energy-saving heat-dissipating mode is 55° C.-65° C., and the stopping temperature (T6) of the second energy-saving heat-dissipating mode is 40° C. to 50° C.
在本發明的溫度-風扇轉速控制曲線圖中標示的各個溫度,包含(T1)~(T6)和(Tmax)並非一種不變的限制而是基於一般電腦電源供應器的特性和規格,依據一般經驗決定的,由於不同規格(例如不同的輸出功率)的電源供應器的工作特性並不相同,決定風扇40開始運轉的啟動溫度(T3、T5),以及在風扇40持續散熱一段時間之後決定風扇40停止運轉的停止溫度(T4、T6),都會依據不同規格的電源供應器而有差異。因此可以理解的是本發明提出的電腦電源供應器的風扇轉速控制裝置的第三種實施例的特徵在於具有一種以上可選擇之散熱控制模式,其中每一種散熱控制模式的 風扇轉速-溫度的動作曲線亦不相同;本發明的一種較佳實施方式包括三種可選擇的散熱控制模式,這三種散熱控制模式可以分別提供標準、經濟和節能等不同效果的散熱控制模式。 The temperatures indicated in the temperature-fan speed control graph of the present invention, including (T1)~(T6) and (Tmax), are not a constant limit but are based on the characteristics and specifications of a general computer power supply. According to experience, since the operating characteristics of the power supply of different specifications (for example, different output powers) are different, the starting temperature (T3, T5) at which the fan 40 starts to operate is determined, and the fan is determined after the fan 40 continues to dissipate for a certain period of time. The stop temperature (T4, T6) of the 40 stop operation will vary depending on the power supply of different specifications. Therefore, it can be understood that the third embodiment of the fan speed control device of the computer power supply provided by the present invention is characterized by having more than one optional heat dissipation control mode, wherein each of the heat dissipation control modes The fan speed-temperature action curve is also different; a preferred embodiment of the present invention includes three selectable heat dissipation control modes that provide different modes of thermal control for standard, economical, and energy efficient, respectively.
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