200925839 -6356twf.doc/p 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種溫度控制裝置與方法，且特別是 有關於一種風扇散熱裝置及其風扇轉速控制方法。、 【先前技術】 e 隨著科技的日新月異，這幾年來電腦硬體的發展也3 進步得相當快速，例如桌上型電腦與筆記型電腦、甚至= 伺服器與工作站等硬體設備都會用到的中央處理器 (Central Processing Unit，CPU) ’其時脈速度亦是發展得越 來越快’以射當今㈣麵輕纽的龐大資料量 縮短處理資料的時間。而隨著中央處理器時脈速度的加 快，其表面溫度亦隨之升高，若不安裝任何可使 裝置，便有可能導致當機甚至硬體設備毁壞的風險，因:， 必須為中央處理器安裝風扇使其降溫 =全範圍之内。然而，薇商在設計風扇 吊都會以非常嚴苛的使用環境去設計，以確保中 ^ 的度無論在何種操作環釘’都可以讓裝置在安全 所 1ft ’可是—般在使用上很少會達_商所設定的 速境^此情況下反而是枉然地讓風扇以極高的 還ίίίΪ 不但對中央處理器沒有什麼好處， 是-種ΐΪ ί與噪音，對硬體設備本身與使用者都 在為中央處理H降溫的魏上顯㈣ 吏付几扇 200925839 5356twf.doc/p 有鑑於此，在過去便麵 BI0S控刪轉速的方法；然™BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a temperature control apparatus and method, and more particularly to a fan heat sink and a fan speed control method therefor. [Previous technology] e With the rapid development of technology, the development of computer hardware has progressed quite rapidly in recent years, such as desktop computers and notebook computers, and even hardware devices such as servers and workstations. The Central Processing Unit (CPU) 'the clock speed is also growing faster and faster' to reduce the processing time of the data by shooting the huge amount of data in today's (four) side. As the clock speed of the central processing unit speeds up, the surface temperature also increases. If no device can be installed, the risk of crashing or even hardware equipment may be destroyed. Because: The fan is installed to cool it down = the full range. However, Weishang designs the fan hoist in a very harsh environment to ensure that the degree of the middle can be made in the safety of the device. Will reach _ the speed set by the business ^ In this case, it will let the fan to be extremely high, not only the central processor, but also the kind of ΐΪ ί and noise, the hardware device itself and the user Wei Shangxian (4), who is dealing with the cooling of the central area, has paid a few fans for 200925839 5356twf.doc/p In view of this, in the past, BI0S controlled the method of deleting the speed;
ί變速控制來改變風扇的轉迷，在程式轉換的Ξ候，S ^㈣溫度上升後便會產生更觸風扇加速聲，因此這 計還是有其缺點存在。目前最被廣泛應㈣風扇轉 速自動控制方法如圖丨所示，這是藉由ί Variable speed control to change the fan's reincarnation. When the program is switched, the temperature of the S ^ (4) rises to produce a more fan-accelerated sound, so this has its shortcomings. At present, the most widely used (four) fan speed automatic control method is shown in Figure ,, which is by
的方式’來債測環境溫度進而調整風扇&速，讓 ，整個”處個穩定的環境溫度。在當溫度低於一個預 :麵時’風扇會以最小輸出功率p_運轉; 二度：於-個預設之最大溫度TMAX時’風扇會以最大 二ΐ M f轉^當溫度介於T_與TmaX之間時， 風扇運轉的輸A功率在理論上較呈線性變化，也 著溫度的上升與下降’風叙輸出功率及轉速亦合 自動t之改變。然而’實際的測試結果顯示，當溫度介； T圓與TMAX之間時’風扇運轉的輸出功率並非 性 變化，此雜必須藉由設計複雜的數學運算公式來算 兩個溫度之間各溫度與風扇輸出功率的對照，如此1來， 就必須要糾設置可執行此解運算的電路 相對地設計成核元件縣顿之私。料，利H 程式透過BIOS以輪詢的方式來偵測溫度，以調整 速的方式，效能較差’亦會造絲源過度 【發明内容】 ' 6 -356twf.d〇c/p ❹ ❹ 200925839 本發明提供一種風扇散熱裳置，毋需另外設置可執行 f雜數學㈣的電路元件錄體，姆地設計成本盘元 成本也隨之降低。 〃 本發明提供-種風扇轉速控制方法，由於並非使用軟 了2 = BK)S以輪詢的方式來偵測溫度’故效能較高， 可有效節省能源。 =決上述問題’本發明提出—種風扇散熱裝置，包 皿度^H、風扇、溫度監控單元、處理單元以及驅動 :=溫度感測器感測操作溫度而輸出感測結果。風扇提 ί風^以降低操作溫度。溫度監控單元祕至溫度感測 比較該感測結果與至少―臨界值，並依據比較結 果而決疋是否發出中斷事件。處理單元输至溫度監控單 二據中斷事件進行中斷服務程序，以設定並輸出 值。驅動單元輕接於處理單元與風扇之間，用以 依據風扇轉速值驅動並控制風扇之轉速。 古、土2明提$ _風扇轉速控制方法。該風扇轉速控制 、^ ’細操作温度而獲得❹m果；比較感測結果 臨界值而獲得比較結果；依據比較結果而決定是 件；依據中斷事件進行中斷服務程序，以設 ^風扇轉速值；以及依據風扇轉速值驅動並控制風扇之轉 速，而長:供風流以降低操作溫度。 本發明之一實施例中，上述之溫度監控單元具有多 ^界值以定義多個溫度控制範圍，可以控制風扇在不同 ✓JDL度下以不同轉速進行運轉。 7 200925839 5356twf.doc/p 在本發明之一實施例中，風扇轉速控制方法更包括提 供一個轉速表。當中斷事件發生時，中斷服務程式依據感 測結果查閱轉速表，以獲得相對應的風扇轉速值。 綜上所述，本發明藉由中斷(Interrupt)功能，再配合 BIOS或驅動程式的中斷服務程式gntermpt Service)，並透 過一個簡單的查表動作，便可完成此一功能，不僅僅大幅The way to 'debt to measure the ambient temperature and then adjust the fan & speed, let, the whole" at a stable ambient temperature. When the temperature is lower than a pre-: surface, the fan will run at the minimum output power p_; At a preset maximum temperature TMAX, the fan will rotate at a maximum of two ΐ M f. When the temperature is between T_ and TmaX, the A-power of the fan is theoretically linear, and the temperature is also The rise and fall of the wind's output power and speed also change automatically t. However, the actual test results show that when the temperature is between T and TMAX, the output power of the fan is not a change in sex. By designing a complicated mathematical formula to calculate the comparison between the temperature between the two temperatures and the output power of the fan, in this case, it is necessary to correct the circuit that can perform the solution operation to be relatively designed as a nuclear component. In fact, the H program uses the polling method to detect the temperature through the BIOS, and the speed is adjusted. The performance is poor. 'There will be too much source of the wire. [Inventive content] ' 6 -356twf.d〇c/p ❹ ❹ 200925839 The invention provides a The fan heat sinks, and there is no need to separately set the circuit component recording body that can perform the f-math mathematics (4), and the cost of the design cost of the device is also reduced. 〃 The present invention provides a fan speed control method, because it is not soft. = BK) S detects the temperature by polling', so it has higher efficiency and can save energy. = The above problem is solved. 'The present invention proposes a kind of fan heat sink, package degree ^H, fan, temperature monitoring unit, Processing unit and drive: = temperature sensor senses operating temperature and outputs sensing result. Fan adjusts wind to reduce operating temperature. Temperature monitoring unit secrets temperature sensing to compare the sensing result with at least "critical value", and According to the comparison result, it is determined whether an interrupt event is issued. The processing unit inputs a temperature monitoring single interrupt event to perform an interrupt service routine to set and output a value. The driving unit is lightly connected between the processing unit and the fan for the fan speed. The value drives and controls the speed of the fan. The ancient and the soil 2 clearly raise the $ _ fan speed control method. The fan speed control, ^ 'fine operation temperature to obtain ❹m fruit; The comparison result is obtained by sensing the threshold value; the determination result is based on the comparison result; the interruption service program is performed according to the interruption event to set the fan speed value; and the fan speed is driven and controlled according to the fan speed value, and the length is: The air flow reduces the operating temperature. In one embodiment of the invention, the temperature monitoring unit has a multi-valued value to define a plurality of temperature control ranges, and the fan can be controlled to operate at different rotational speeds under different ✓ JDL degrees. 7 200925839 5356twf .doc/p In one embodiment of the present invention, the fan speed control method further includes providing a tachometer. When an interrupt event occurs, the interrupt service routine refers to the tachometer according to the sensing result to obtain a corresponding fan speed value. In summary, the present invention can perform this function by using an interrupt function, in conjunction with the BIOS or the driver's interrupt service program gntermpt Service, and through a simple table lookup operation, not only
減少由軟體所需要的程式架構，並且風扇的效能將會有效 地提升。 為讓本發明之上述特徵和優點能更明顯易懂，下文特 舉較佳實施例，並配合所附圖式，作詳細說明如下。 【實施方式】 μα 刖的電腦系統（例如個人電腦、伺服器與工作站） 設計來說，溫度監測魏已蝴為重要設計考量， = 的常重要的項目，咖^ 形而產生溫度的變化，於是 例，藉由此智藝型風扇二=轉逮。以下說明本發明實施 讓整個系統處於-個穩;的、環風扇轉速控制方法， 感測器21、溫度監控單::2扇》，置結構圖，包括溫度 與風扇25等。溫度監控單元早兀23、驅動單元24、 處理單元23耦接至溫度監控 接至溫度感應器21，而 處理單元23與風扇25之間。几22 ’驅動單70 24耦接於 8 200925839 ->356twf.doc/p 接著’同時參照圖2與圖3Α以說明本實施例中各元 件間的運作方式。在步驟S33中，溫度感測器21感測電 ，系統内部或中央處理器等裝置之操作溫度，並將感測結 果輸出至溫度監控私22。在步驟S34巾，溫度監控單元 22用來比較溫度感測器21的感·果與至少—個^界值 (Threshold)。在步驟S35中，溫度監控單元22依據比較結 Ο 果以決定是否發出中斷事件給處理單元23,若感測結果達 到臨界值’則會繼續進行到步驟S36，·若感測結果未達到 臨界值，則會進行到步驟S37，維持原本的風扇轉速值， 接著進行❹驟S38，鶴單元24依據縣的風扇轉速值 驅動並控制風扇25的轉速。 在步驟S36中，處理單元23若收到溫度監控單元 所，出的中斷事件，便會根射斷事件進行-個中斷服務 程式，以設定並輸出風扇轉速值至驅動單元24，該中斷服 務程f的詳細步驟將會在稍後加以說明。在步驟S38中， 24依據處理單兀23所給的風扇轉速值驅動並控 鏟U的轉速。風扇25收到驅動單元24所發出的風扇 便提供風流以降低操作溫度。最後再度回 驟S33中執行。 / 廿栽U來說，電腦系統在進入作業系統之前會經過開機 一些系統所需軟體的程序，而在圖3B +，將 丁；容再加以說明本發明實施例之開機自我測試 細步驟s36咖〜如，以及中斷處理程式步驟幻6之詳 、' ’ a〜S36c。參照圖2與圖3B，開機自我測試步 200925839 >356twf.doc/p °又疋風扇轉速表S31與初始化中斷服務程式S32等 =驟:在步驟S31t，必須制定出風扇轉速的規則， -健2與溫度的高低㈣，可依據兩者之關係整理成 ^ 先在轉速表中定義出―個或多個臨界值，例Reduce the program architecture required by the software, and the performance of the fan will be effectively improved. The above described features and advantages of the present invention will become more apparent from the following description. [Embodiment] The computer system of μα ( (such as personal computer, server and workstation) is designed to monitor the temperature of Wei. It is an important design consideration, and the important items of =, the temperature changes, so For example, by means of this intelligent fan 2 = transfer. The following describes the implementation of the present invention. The entire system is in a stable state, the ring fan speed control method, the sensor 21, the temperature monitoring unit: 2 fans, and the structure diagram, including the temperature and the fan 25. The temperature monitoring unit is early, the driving unit 24, and the processing unit 23 are coupled to the temperature monitoring unit to the temperature sensor 21, and the processing unit 23 is connected to the fan 25. A few 22' drive units 70 24 are coupled to 8 200925839 -> 356 twf.doc/p. Next, reference is made to Figs. 2 and 3B to illustrate the operation of the elements in this embodiment. In step S33, the temperature sensor 21 senses the operating temperature of the device, the internal system or the central processing unit, and outputs the sensing result to the temperature monitoring private 22 . In step S34, the temperature monitoring unit 22 is used to compare the sense of the temperature sensor 21 with at least a threshold value. In step S35, the temperature monitoring unit 22 determines whether to issue an interrupt event to the processing unit 23 according to the comparison result. If the sensing result reaches the critical value, the process proceeds to step S36. If the sensing result does not reach the critical value. Then, the process proceeds to step S37 to maintain the original fan speed value. Then, step S38 is performed, and the crane unit 24 drives and controls the number of revolutions of the fan 25 in accordance with the fan speed value of the county. In step S36, if the processing unit 23 receives the interrupt event from the temperature monitoring unit, it will perform an interrupt service routine to set and output the fan speed value to the driving unit 24, the interrupt service process. The detailed steps of f will be explained later. In step S38, 24 drives and controls the rotational speed of the shovel U according to the fan rotational speed value given by the processing unit 23. The fan 25 receives the fan from the drive unit 24 to provide a flow of wind to reduce the operating temperature. Finally, it is executed again in step S33. / 廿 U U, the computer system will enter the operating system before going through the operating system required software, and in Figure 3B +, will be described again, the embodiment of the present invention self-test self-test step s36 coffee ~ For example, as well as the interrupt handler step illusion 6, ' ' a ~ S36c. Referring to FIG. 2 and FIG. 3B, the boot self-test step 200925839 > 356twf.doc/p ° and the fan tachometer S31 and the initialization interrupt service program S32, etc. = step: In step S31t, the rule of the fan speed must be determined, 2 and the temperature level (four), can be arranged according to the relationship between the two ^ first define one or more critical values in the tachometer, for example
招械C、31t、與35°c(此溫度亦可經由使用者加以設定）。 ^據溫度感測器21感_作業溫度，便可如下述設定轉速 L當作業溫度大㈣於饥時，設定風扇25以全速來 1轉^作業溫度小於执並大於等於批時，設定風扇 以相對於全速的90%之中速(MidSpeed)來運轉；當作業 溫度小於31t並大於等於沉時，設定風扇25以相對於 全速的70%之低速(Low Speed)來運轉；當作業溫度小於 f C時，設定風扇25以相對於全速的6〇%之最低速(L_st Speed)來運轉。接著’在步驟S32中，將中斷服務程式進 仃初始化的動作，以使處理單元23在收到中斷事件時，有 執行中斷服務程式的依據。 同樣減圖2與圖3B’在設定完風扇轉速表與初始化 中斷服務程式之後，f腦減便會進人其作業系統。在大 部分時間中，作業系統並不需找理溫度控制的相關作業 因此可以提升祕的整體效[溫度監督的工作會交由溫 度感測器21與溫度監控單元22來進行。溫度感測器21 執?步驟SB來感測操作溫度，並輸出感測結果給溫度監 控早兀22。溫度監控單元22執行步驟S34以比較盥臨界 值二者的關係’再執行步驟35觸是否發出中斷事件給處 理單元23。例如’若溫度感測器21之感測結果表示目前 56tw£doc/p 200925839 操作溫度約略等於臨界值（例如咖、 則表示系統可能需要依據轉速轰 4心c)， 温度監控單元22便發出中轉斷 朗，糾此資^ 接者說日月S36中斷服務程式 S36a讀取感測結果，b依據風扇轉 值、以及S36C將風扇轉速值輪 、疋風扇轉速 ❹ 巾，考神留-輸出等二個步驟。在步驟S36a ❹^杲Γ70於太=目前操作溫度（即温度感測器21之 Ϊ脱果〕：於本1_巾，祕溫度監控單元22續時 皿視溫度感心21之感測結果’因 ^從 得目前之操作溫度二 他:_中’處理單元23可以直接從溫度感測器Μ = 目刖之操作溫度（感測結果）。 〜、Π 侍 先·中’處理單723根據在步驟s31中所事 =接二二過査2表2的方式，決定風扇轉迷值。: ^23便向溫度監控單㈣理: 度處Ϊ,查2前述轉速表。根據溫度感測器21 = 礼、、。果，處理早疋23可以從轉逮表 的感 值。沿用前例，若作業溫度大於^ ，目、、風屬轉迷 扇轉速值為「職」（全速）、;y 5，'相對應的風 間’則相對應的風扇轉迷值為，:」’(於中=至 右作業溫度介於3rc至2rc-間’則相對應的以值 200925839 )6twf.doc/p 為「70%」（低速），·若作業溫度小於27°C，則相對應的 風扇轉速值為「60%」（最低速）。 ❹ 接著在步驛S36c中，處理單元23將查表所得的風扇 轉速值輪出至驅動單元24。最後，在步驟S38中，驅動單 元24根據風速轉速值驅動並控制風扇25的轉速。在完成 步驟S36之中斷服務程序後，處理單元23可以不需=去 處理溫度控制的相關作業（直到溫度監控單元22發出下一 個中斷事件），以提升系統的整體效能。 在本發明之另一實施例中，可以針對t斷服務程式進 行另一種實施方式。圖4即為圖3B中步驟S36中斷服務 程式的另一種實施步驟S36,之流程圖。參照圖4盥圖2， 首先，處理單元23同樣是在步驟S36a中讀取溫度感測器 ^或溫度处單元22所取得之操作溫度。接下來在步驟 6d中’根據風扇轉速表查出相對的風扇轉速值，並 ^速Ϊ查出的風扇轉速值與目前運行的風扇轉速值加 =匕較。右兩者相同（表示目前運行的風扇轉速值 變），因此在步驟S38中，驅動單 轉速值驅動與控觀扇25的轉速。若：風f 運行的風扇轉速值需要改變），處 °不目别 =風r速值設r:前運行 動單元％便會^如’如步驟现。驅 轉速，如核_並控賴扇μ的 流以降低電腦系統内部或中央處理器更速-出風 12 200925839 ►356twf.doc/p 在本發明實施例中，風扇轉速的改變原理，是靠著其 電壓之輸出功能，並假設以脈衝頻寬調變(PW]Vq的方式來 貫現，所謂脈衝頻寬調變的方式可將輪出電壓轉成以脈衝 的方式供給，改變脈衝寬度、數量以得到所需的電壓和頻 率。此功能藉由改變風扇轉速電壓輸出設定值，使硬體上 脈衝頻寬調變功能提供不同的電壓送至風扇，進而改變轉 速’有效達到散熱的效果。 Ο ❹ 至於本發明實施例中所提及之元件，可以將溫度感測 器21、溫度監控單元22、與驅動單元24等製作成單一的 /皿，aa片（Thermal Chip) ’或者將溫度感測器21、溫度監 控單το 22、與驅動單元24整合至處理單元刀中，以節省 成本以及電路佈線所需空間。 綜上所述，本發明之實施例藉由中斷功能，再配合 BIOS或驅動程式的中斷服務程式，便可完成此一功能，不 =減^軟體所需要的㈣_，並且此功能的效能將 ^ β升。此外’本發明除了可應用在個人電腦、伺服 :田與：作站等電觸設備内部或中央處理器上之 使用=電轉產品内部之任何需要散熱的元件上。 ^本發明已以較佳實施例揭铁 限定本發明，任何所眉姑#…、共工非用Μ 脫雜太屬賴射具有通常知識者，在不 因此本發明之賴許之更動與濁飾， 為準 圍田視後附之申請專利範圍所界定者 【圖式簡單說明】 13 200925839 ----------_5356twf.doc/p 产曲^圖1繪示為f知的風扇轉速自動控制方法之功率-溫 圖2繪不為依照本發明實施例說明之風扇散熱裝置結 構圖。 圖3A繪示為依照本發明實施例說明之風扇轉速控制 流程圖。 圖3B繪示為依照本發明實施例說明之詳細風扇轉速 ❹ 控制流程圖。 圖4繪示為依照本發明實施例說明，圖3B中步驟S36 中斷服務程式的另一種實施步驟S36,之流程圖。 【主要元件符號說明】 21 :溫度感測器 22:溫度監控單元 23 :處理單元 24 :驅動單元 & 25 •風扇 531 :設定風扇轉速表 532 :初始化中斷服務程式 533 :感測操作溫度，並輸出感測結果 534 :比較感測結果與臨界值 535 :是否發出中斷？ 536 :中斷服務程式 S36’ ：中斷服務程式 S36a :讀取感測結果 14 200925839 6356twf.doc/p S36b :依據風扇轉速表決定風扇轉速值 S36c :將風扇轉速值輸出 S36d :找出相對的風扇轉速值與目前的風扇轉速值比 對是否相同？ S36e :設定新的風扇轉速值 537 :維持原本的風扇轉速值 538 :依據風扇轉速值驅動風扇轉速Invoke C, 31t, and 35°c (this temperature can also be set by the user). According to the sense of temperature sensor 21, the operating speed can be set as follows. When the operating temperature is large (4), when the fan 25 is set to full speed, the fan 25 is set to full speed and the operating temperature is less than or equal to the batch. Running at 90% medium speed (MidSpeed) with full speed; when the operating temperature is less than 31t and greater than or equal to sinking, set fan 25 to run at 70% of the full speed (Low Speed); when the operating temperature is less than f At C, the fan 25 is set to operate at a minimum speed (L_st Speed) of 6〇% with respect to the full speed. Next, in step S32, the interrupt service routine is initialized to cause the processing unit 23 to execute the interrupt service routine upon receipt of the interrupt event. Similarly, minus Figure 2 and Figure 3B', after setting the fan tachometer and initializing the interrupt service routine, the f brain reduction will enter the operating system. For most of the time, the operating system does not need to look for the related operations of the temperature control, so that the overall effect of the secret can be improved [the work of temperature supervision is carried out by the temperature sensor 21 and the temperature monitoring unit 22. The temperature sensor 21 performs step SB to sense the operating temperature and outputs the sensing result to the temperature monitoring early 22 . The temperature monitoring unit 22 performs step S34 to compare the relationship between the two threshold values, and then performs step 35 to contact whether the interrupt event is issued to the processing unit 23. For example, if the sensing result of the temperature sensor 21 indicates that the current operating temperature of 56 tw£doc/p 200925839 is approximately equal to the critical value (for example, the coffee indicates that the system may need to be based on the rotational speed), the temperature monitoring unit 22 is issued. Turning off, correcting this resource ^ Receiver said that the S36 interrupt service program S36a reads the sensing result, b according to the fan value, and the S36C fan speed value wheel, 疋 fan speed ❹ towel, test God stay-output, etc. Two steps. In step S36a, the current operating temperature (i.e., the temperature sensor 21 is removed): in the 1_ towel, the temperature monitoring unit 22 continues the sensing result of the temperature sensing 21 ^ From the current operating temperature two: _ in the 'processing unit 23 can directly from the temperature sensor Μ = the operating temperature of the target (sensing results). ~, 侍 waiter · middle 'processing single 723 according to the step In the s31 thing = 2 or 2 check 2 table 2, determine the fan reciprocal value.: ^23 will be to the temperature monitoring single (four) reason: degree Ϊ, check 2 the above tachometer. According to the temperature sensor 21 = Ceremony, and. If you handle the early morning, you can get the sense value from the transfer table. If you use the previous example, if the operating temperature is greater than ^, the head and wind are the fans' speed value is "job" (full speed), y 5, 'The corresponding wind room' corresponds to the fan reversal value,:"' (in the middle = to the right operating temperature between 3rc and 2rc - between the corresponding value of 200925839) 6twf.doc / p for " 70%" (low speed), if the operating temperature is less than 27 °C, the corresponding fan speed value is "60%" (lowest speed). ❹ Then at step S36c The processing unit 23 rotates the fan speed value obtained by the look-up table to the drive unit 24. Finally, in step S38, the drive unit 24 drives and controls the rotation speed of the fan 25 according to the wind speed rotation value. The interrupt service routine is completed in step S36. Thereafter, the processing unit 23 may not need to process the related operations of the temperature control (until the temperature monitoring unit 22 issues the next interrupt event) to improve the overall performance of the system. In another embodiment of the present invention, The service program performs another implementation manner. Fig. 4 is a flow chart of another implementation step S36 of the interrupt service routine of step S36 in Fig. 3B. Referring to Fig. 4 and Fig. 2, first, the processing unit 23 also reads in step S36a. Take the operating temperature obtained by the temperature sensor or the temperature unit 22. Next, in step 6d, 'detect the relative fan speed value according to the fan speed meter, and the speed of the fan detected by the speed is compared with the current running speed. The fan speed value is increased by 匕. The right two are the same (indicating that the currently running fan speed value is changed), so in step S38, the single speed value is driven to drive and control the fan 25 Speed: If the fan speed value of the wind f operation needs to be changed), the position of the wind does not change. = The speed of the wind r is set to r: Before the operation, the % of the moving unit will be as follows. Drive the speed, such as the core _ and control the flow of the fan μ to reduce the internal speed of the computer system or the central processor faster - the wind 12 200925839 ► 356twf.doc / p In the embodiment of the invention, the principle of changing the speed of the fan is The output function of the voltage is assumed to be realized by the pulse width modulation (PW)Vq. The so-called pulse bandwidth modulation method can convert the wheel-out voltage into a pulsed manner, changing the pulse width, The number is used to get the required voltage and frequency. This function changes the fan speed voltage output setting value, so that the pulse frequency modulation function on the hardware provides different voltages to the fan, thus changing the speed to effectively achieve the heat dissipation effect. ❹ ❹ As for the components mentioned in the embodiments of the present invention, the temperature sensor 21, the temperature monitoring unit 22, the driving unit 24, and the like can be made into a single/par, aa chip (Thermal Chip) or a sense of temperature The detector 21, the temperature monitoring unit το 22, and the driving unit 24 are integrated into the processing unit blade to save cost and space required for circuit wiring. In summary, the embodiment of the present invention has an interrupt function. In conjunction with the BIOS or driver interrupt service program, this function can be completed, not = minus the software required (4) _, and the performance of this function will be ^ β liter. In addition, the invention can be applied to personal computers, servos. :Tian and: use on the internal or central processor of the electric equipment such as the station = any component inside the product that needs to dissipate heat. The invention has been limited to the invention by the preferred embodiment, any of the eyes ..., co-worker not used Μ 脱 太 太 太 太 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有Description] 13 200925839 ----------_5356twf.doc/p Production curve ^ Figure 1 shows the power-temperature diagram of the fan speed automatic control method known as F. Figure 2 is not illustrated in accordance with an embodiment of the present invention. Figure 3A is a flow chart showing the control of the fan speed according to the embodiment of the present invention. Figure 3B is a flow chart showing the detailed control of the fan speed 依照 according to an embodiment of the present invention. According to an embodiment of the present invention Step S36 of FIG. 3B interrupts the service program by another implementation step S36, which is a flowchart. [Main component symbol description] 21: Temperature sensor 22: Temperature monitoring unit 23: Processing unit 24: Drive unit & 25 • Fan 531: Set the fan tachometer 532: Initialize the interrupt service program 533: sense the operating temperature, and output the sensing result 534: compare the sensing result with the threshold 535: Is the interrupt issued? 536: Interrupt service program S36': interrupt service program S36a: Read sensing result 14 200925839 6356twf.doc/p S36b : Determine the fan speed value according to the fan tachometer S36c: Output the fan speed value to S36d: Find out whether the relative fan speed value is the same as the current fan speed value. ? S36e : Set new fan speed value 537 : Maintain the original fan speed value 538 : Drive fan speed according to the fan speed value
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