1327261 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種風扇控制系統，特別是指一種 偵測工作元件之溫度與功率而據以控制風扇轉速之 風.扇控制系統。 【先前技術】 在一般之電子裝置或生產系統中，有許多時候必 須對裝置、系統或環境溫度進行有效之控制，才能確 保裝置或系統在高效能的環境下運作。為了對這些電 子裝置（如電腦）或生產系統（如氣冷式綷火加工系 統）之運作溫度進行有效的控制，除了加熱和恆溫回 饋系統外，冷卻系統亦扮演著相當重要的角色。在這 些冷卻系統中，所採用之冷卻方式大多不外乎氣冷 式、液冷式或固態熱傳導等方式。其中，又因為氣冷 式之運作成本通常較為低廉，故廣為大眾所採用。 在此一前提下，環顧大部分之氣冷式冷卻系統 中，風扇可謂是常見冷卻元件中最具代表性之一者。 在習知技術中，風扇通常會因為其冷卻對象之不同而 以不同的方式而加以控制，其控制方式通常有三種控 制方式：其一係設定固定之轉速而加以控制；其二為 利用偵測溫度來加以控制之方式；其三則為利用偵測 功率來加以控制之方式。 對於第一種方式而言，通常設有數段風速以供使 用者選擇與切換，除非使用者以手動切換之方式加以 控制，否則根本無法因應環境而自動調整轉速。在此 7 狀況下，為了減少使用者手動切換之操作次數，以及 對裝置或系統控制安全係數的考量，通常都會將風扇 設定在較高之固定轉速下運轉，因而容易產生較大之 噪音，並且會消耗較多之工作電力。 對於第二種方式而言，吾人將列舉一例加以說 明。請參閱第一圖，其係顯示一習知技術中之工作元 件、風扇控制系統與風扇之功能方塊圖。如圖所示， 一風扇控制系統1係用以偵測一工作元件2之溫度， 據以控制用於冷卻該工作元件2之一風扇3之轉速。該 風扇控制系統1包含有一工作元件溫度偵測單元 11、一處理單元12與一風扇控制電路13。其中，工 作元件溫度偵測單元11係用以偵測該工作元件2選 定位置之溫度，據以發送出一工作元件溫度信號S1 至處理單元12進行處理運算，經過處理單元12之處 理運算後，會發送出一控制信號S2至風扇控制電路 13，據以對風扇3之轉速進行無分段或分段運轉之控 制。 舉凡在風扇控制系統相關領域中具有通常知識 者皆能理解，在上述習知技術中，當所偵測之溫度低 於特定值時，風扇則不會轉動，藉以減少電力之消 耗。然而，倘若工作元件2長時間處於高負載操作狀 態，在結束操作或轉為低功率運作時，其溫度尚高， 使風扇3仍會高速運轉而產生噪音。當所偵測之工作 溫度在預設之臨界參考值時，風扇3可能會轉轉停 停，或不斷啟動。在溫度偵測方面，若風扇3不轉， 工作元件溫度偵測單元11僅靠與工作元件2接觸傳 導方式來偵測，使真正發熱元件之溫度上有差距。此 外，對於工作元件溫度偵測單元11與運作時會發熱 之工作元件2而言，皆有安全規範方面之要求。在實 【發明内容】 本發明所欲解決之技術問題與目的： 綜整以上所述，在習知技術中常用之三種處理方 式，分別存在有不少缺點。其中，在設定固定之轉速 而加以控制之方法中，為了減少使用者手動切換之操 =次數，以及對裝置或系統控制安全係數的考量，通 會將風扇設定在較高之固定轉速下運轉，因而容 易產生較大之噪音，並且會消耗較多之工作電力。 在利用偵測溫度來加以控制 之方式中 當所彳貞測 作溫度在預設之臨界參考值時，可二貝N 停停，或不斷啟動；且為了符合安全會轉轉 易致使偵測所得之結果失真。 &要求，容 在利用偵測功率來加以控制之方式中，一曰 元件停止運作，風扇就會跟著停止運作二二 :冷卻的效果。當工作元件以較高之啟提 作，或是在高啟動功率進行短時間的操作，運 ii感舒適的噪音。同時，在長時間高負载之ί 由，然轉成低負載狀況時’將容易致使工 作元件之損壞。 此而造成工 緣此’本發明之主要目的係提供一種風 統，該系統具有工作元件溫度偵測單元與工i t ，偵測單元，藉以分別偵測出工作元件之溫声與= 率，並據以產生控制信號來控制風扇之轉逮ς拉^ 決上述問題。 崎解 本發明解決問題之技術手段： 解決習知技術之問題所採用之技術手 風扇控制系統，其係用以偵測工作元件 之酿f與功率’據以控制用於冷卻該工作元件之至少 該風扇控制系統包含有至少-工作元 n二ί元，藉以彳貞測該工作元件之溫度以得到 一1兀件溫度。該風扇控制系統尚包含有至少一工作 ^ 偵測單元’藉則貞_工作元件之功率以得 制ί肷兀率。該風扇控制系統更包含有-風扇控 一 ’ k風扇控制電路預設有一下限參考溫度、 考溫度之上限參考溫輯—參考功 f藉U在與該工作元件溫度及該工作元件功行 =後’據以輸出―控制信號而控制上述風扇之運轉 本發明對照先前技術之功效： 速之H用f定^定之轉速以控制風扇轉 ，本發料反應工作元件溫度與工作元 ::率：調整該控制信號，並有效控制風扇 =二可以收到有效解決高噪音與高電力消耗 (功效。 〜 轉速利二，則工作元件溫度以控制風扇 ，，之技術而s，當風扇不轉時，仍可藉由工作 之偵測結果來輔助運算風扇之轉速，可有效 ϋ作元件溫度偵測結果失真而造成控制上^ 偏^差。同時，在工作元件偵測溫度介於臨界值 可藉由JL作兀件功率之控制因子來控制 J ：風扇不至於轉轉停停。因此，可 當之控制偏差以及穩定風扇轉速之功效。 兄夕不 相較於習知利用偵測工作元件功率以控制風扇 1327261 .轉速之技術而言，一旦工作元件停止運作， 速仍會受到工作元件溫度之控制，而乍，f之轉 ，。當工作元件以較高之啟動功率開始=即， 在尚啟動功率進行短時間的操作時，由或疋 度仍不高，故會緩衝稀釋工作元件因子而溫 至於在太高之轉速下運轉而產生高哚音。風J不 時間高負載之狀況下，突然轉成低負载狀眸，f長 工作元件溫度仍偏高，故風扇轉速不會立於 多，使得工作元件仍可繼續獲得充分卩下降太 受損。因此…收到穩定之== 噪音與保護工作元件之效果。 間啟動 本發明所採用的具體實施例，將藉由之 例及附呈圖式作進一步之說明。 卜之實施 【實施方式】 由於本發明所提供之風扇控制系 於各種具有冷卻或散熱風扇之系統…且 :是不J枚舉’故在此不再一一贅述，僅; 佳之二實施例加以說明。 彳今丹Y較 請參閱第三圖，其係顯示本發明第一實 能方塊圖。如圖所示，一風扇控制系統4係 :工2件5之溫度與功率’據以控制 j 之：風扇6之轉速。該風扇控制系統4“ 有一工作凡件溫度偵測單元41、一工 單元42與一風扇控制電路43。其中，工作 偵測單元41係用以偵測工作元件5之至少一 置（如中心位置或表面位置）之溫度，以得到一工 元件溫度Τ(標示於第五圖）’並透過一工作元件溫 12 1327261 度信號S4傳送至風扇控制電路43。工作元件功率偵 測單元42係用以偵測該工作元件之功率，以得到一 工作元件功率P(標示於第五圖），並透過一工作元 件功率信號S5傳送至風扇控制電路43。風扇控制電 路43係分別連通工作元件溫度偵測單元41與該工作 元件功率偵測單元42，並依據工作元件溫度信號S4 所傳送之工作元件溫度T，以及工作元件功率信號S5 所傳送之工作元件功率P而輸出一控制信號S6。 請繼續參閱第四圖與第五圖。其中，第四圖係顯 示本發明第一實施例之風扇控制系統之功能方塊 圖，第五圖係顯示第四圖所對應之電路圖。如圖所 示，上述之風扇控制電路43包含有一功率信號傳輸 電路431、一下限溫度比較單元432、一上限溫度比 較單元433、一參考功率比較單元434、一控制開關 435、一控制閘436、一緩衝電路437與一權重加法器 438。 其中，功率信號傳輸電路431中設有一限流元件 431a，藉以限制流入風扇控制電路43之電流。下限 溫度比較單元432與上限溫度比較單元433内分別預 設有一下限參考溫度T1與一上限參考溫度T2，藉以 供上述之工作元件溫度T分別與之比對。同時，參考 功率比較單元434内則預設有一參考功率Pref，藉以 供上述之工作元件功率與之比對。在本實施例中，限 流元件431a係指一限流電阻，下限溫度比較單元 432、上限溫度比較單元433與參考功率比較單元434 皆分別為一比較放大器。 控制開關435係分別連通於功率信號傳輸電路 431與下限溫度比較單元”432，並且具有一閉路位置 01、一開路位置02與一接地端G。控制閘436係分 13 -別連通上述之上限溫度比較單元433與參考功率比較 單元434。緩衝電路437係連通控制開關4%，其包 含有，五圖所示之放大器與回授電路。權重加法器 438係为別連通控制閘436與緩衝電路437，其内設 有一組配比權重W，在本實施例中，該組配比權重w 包含有一第一配比權重W1與一第二配比權重w2。 在風扇控制電路43開始運作時，功率信號傳輸 電路431會傳輸代表一第一控制因子A(在^施例 中係工作元件功率）之一第一因子信號SA。同時， 當工作元件溫度τ高於下限參考溫度T1時，會發出 一開關控制信號S7，藉以將控制開關435切換至開 路位置02，並傳送出第一因子信號SA，當工作元件 恤度T低於下限參考溫度T1時，所發出之開關控制 信號S7會將控制開關435切換至閉路位置〇丨，以使 第一因子化號SA依序經由閉路位置〇ι與接地端g 而接地，換以言之，亦即不會傳送出第一'因子信號 SA。在本實施例中，在控制開關435與權重加法器 438之間特別接上緩衝電路437，藉以穩定地將第二 因子信號SA傳送至權重加法器438。 此外，在工作元件溫度T與上限參考溫度T2進 行比較後，會產生代表一第二控制因子B之一第二因 子信號SB ;在工作元件功率p與參考功率pref進行 比較後，會產生代表一第三控制因子c之一第三因子 信號SC。控制閘436在本實施例中係指一或閘（〇R Gate)’其係用以控制第二因子信號SB與第三因子信 號SC之傳送。當工作元件溫度τ高於上限參考溫^ T2時，會傳送出第二因子信號SB ;當工作元件 Τ低於該上限參考溫度Τ2時，則中斷傳送該第 子信號SB;當工作元件功率p高於參考功率pref時， 1327261 、風扇控制系統與 第二圖係顯示另1知技街中之工作元件 風扇之功能方塊圖； 第三圖係顯示本發明第1施例之功能方塊圖； 第四本發㈣1施狀風扇㈣'㈣之功能方 塊圖； 第五圖係顯示第四圖所對應之電路圖；以及1327261 IX. Description of the Invention: [Technical Field] The present invention relates to a fan control system, and more particularly to a fan control system for detecting the temperature and power of a working element to control the fan speed. [Prior Art] In a typical electronic device or production system, there are many times when the device, system or ambient temperature must be effectively controlled to ensure that the device or system operates in a highly efficient environment. In order to effectively control the operating temperatures of these electronic devices (such as computers) or production systems (such as air-cooled bonfire systems), cooling systems play an important role in addition to heating and constant temperature feedback systems. In these cooling systems, the cooling methods used are mostly air-cooled, liquid-cooled or solid-state heat conduction. Among them, because the operating cost of air-cooled type is usually relatively low, it is widely used by the public. Under this premise, fans are one of the most representative of the common cooling components in most air-cooled cooling systems. In the prior art, the fan is usually controlled in different ways because of its different cooling objects. The control mode usually has three control modes: one is to set a fixed speed to control, and the other is to use detection. The way the temperature is controlled; the third is the way to use the detected power to control it. For the first method, there are usually several wind speeds for the user to select and switch. Unless the user controls by manual switching, the speed cannot be automatically adjusted according to the environment. In these 7 situations, in order to reduce the number of manual switching operations by the user and the safety factor of the device or system control, the fan is usually set to operate at a higher fixed speed, which is likely to generate a large noise, and Will consume more work power. For the second method, we will cite an example to illustrate. Please refer to the first figure, which is a functional block diagram showing the working elements, fan control system and fan in a prior art. As shown, a fan control system 1 is used to detect the temperature of a working element 2 for controlling the speed of the fan 3 for cooling the working element 2. The fan control system 1 includes a working element temperature detecting unit 11, a processing unit 12, and a fan control circuit 13. The working element temperature detecting unit 11 is configured to detect the temperature of the selected position of the working element 2, and send a working element temperature signal S1 to the processing unit 12 for processing operation, after processing by the processing unit 12, A control signal S2 is sent to the fan control circuit 13 for controlling the speed of the fan 3 without segmentation or segmentation. It is understood by those of ordinary skill in the art of fan control systems that, in the above-described prior art, when the detected temperature is below a certain value, the fan does not rotate, thereby reducing power consumption. However, if the working element 2 is in a high load operation state for a long time, the temperature is still high at the end of the operation or when it is switched to the low power operation, so that the fan 3 still operates at a high speed to generate noise. When the detected operating temperature is at the preset critical reference value, the fan 3 may be turned to stop or continuously. In the temperature detection, if the fan 3 does not rotate, the working element temperature detecting unit 11 is only detected by the contact with the working element 2, so that there is a gap in the temperature of the real heating element. In addition, there are safety specifications for the working element temperature detecting unit 11 and the working element 2 that generates heat during operation. SUMMARY OF THE INVENTION The technical problem and object to be solved by the present invention are as follows: In the above, there are a number of disadvantages in the three processing methods commonly used in the prior art. Among them, in the method of setting a fixed rotation speed and controlling, in order to reduce the number of operations manually switched by the user, and the safety factor of the device or the system control, the fan is set to operate at a higher fixed rotation speed. Therefore, it is easy to generate a large noise and consume a lot of work power. In the method of using the detected temperature to control, when the measured temperature is at the preset critical reference value, the second stop can be stopped or continuously started; and in order to comply with the safety, the detection may be caused by the transfer. The result is distorted. & requires that, in the way of using the detected power to control, once the component stops operating, the fan will stop functioning 22: cooling effect. When the working component is raised at a higher speed, or at a high starting power for a short period of time, the comfort is comfortable. At the same time, it will easily cause damage to the working components when the high load for a long time is turned into a low load condition. The main purpose of the present invention is to provide a wind system having a working element temperature detecting unit, a working unit, and a detecting unit, respectively, for detecting the temperature and the sound rate of the working element, and According to the generation of control signals to control the transfer of the fan to solve the above problems. The technical means for solving the problem of the present invention: a technical hand fan control system for solving the problems of the prior art, which is used for detecting the brewing power and the power of the working element to control at least the cooling of the working element The fan control system includes at least a working element n ohms to thereby measure the temperature of the working element to obtain a one-piece temperature. The fan control system further includes at least one operation detecting unit </ br> 贞 _ working element power to obtain a 肷兀 rate. The fan control system further comprises a fan control circuit. The fan control circuit presets a lower limit reference temperature, and the upper limit of the test temperature is referenced to the temperature series. The reference function f is used after the temperature of the working element and the work element is Controlling the operation of the above fan according to the output-control signal. The present invention compares the effects of the prior art: The speed of the speed is determined by the speed of the fan to control the fan rotation, the temperature of the working element and the working element of the present reaction:: rate: adjustment The control signal and effective control of the fan = two can be effectively resolved to solve high noise and high power consumption (efficacy. ~ rev 2, then the working element temperature to control the fan, the technology and s, when the fan does not turn, still The operation detection result can be used to assist the operation fan speed, which can effectively make the component temperature detection result distortion and cause the control difference. At the same time, the working element detection temperature is between the critical value and can be determined by JL. As a control factor of the power of the piece to control J: the fan does not stop and stop. Therefore, it can control the deviation and stabilize the fan speed. Brother and evening are not compared with the conventional With the technique of detecting the power of the working element to control the fan 1327261. The speed of the motor, once the working element stops operating, the speed is still controlled by the temperature of the working element, and 乍, f turns. When the working element has a higher starting power Start = that is, when the power is still activated for a short period of time, the or the degree of enthalpy is still not high, so the dilution of the working element factor is buffered and the temperature is too high to operate at a high speed to generate a high voice. Under high load conditions, it suddenly turns into a low load state, and the temperature of the working element is still high, so the fan speed will not stand too much, so that the working component can continue to get sufficient, the drop is too damaged. Therefore... received Stable == Noise and the effect of protecting the working elements. The specific embodiments used to activate the present invention will be further illustrated by the examples and the accompanying drawings. [Implementation] [Implementation] The fan control is applied to various systems with cooling or cooling fans... and: it is not J enumeration', so it will not be repeated here, only; the best example is explained. 彳今丹Y Please refer to the third figure, which shows the first practical energy block diagram of the present invention. As shown, a fan control system 4 is configured to control the temperature and power of the workpiece 5: the speed of the fan 6. The fan control system 4 has a working temperature detecting unit 41, a working unit 42 and a fan control circuit 43. The working detecting unit 41 is configured to detect at least one of the working elements 5 (such as a central position). Or the temperature of the surface position) to obtain a component temperature Τ (labeled in the fifth figure)' and transmitted to the fan control circuit 43 through a working element temperature 12 1327261 degree signal S4. The working element power detecting unit 42 is used The power of the working component is detected to obtain a working component power P (indicated in the fifth diagram) and transmitted to the fan control circuit 43 via a working component power signal S5. The fan control circuit 43 communicates with the working element temperature detecting unit 41 and the working element power detecting unit 42 respectively, and the working element temperature T transmitted according to the working element temperature signal S4 and the working element transmitted by the working element power signal S5. The power P outputs a control signal S6. Please continue to see the fourth and fifth figures. The fourth figure shows a functional block diagram of the fan control system of the first embodiment of the present invention, and the fifth figure shows the circuit diagram corresponding to the fourth figure. As shown in the figure, the fan control circuit 43 includes a power signal transmission circuit 431, a lower limit temperature comparison unit 432, an upper limit temperature comparison unit 433, a reference power comparison unit 434, a control switch 435, a control gate 436, A buffer circuit 437 and a weight adder 438. The power signal transmission circuit 431 is provided with a current limiting element 431a for limiting the current flowing into the fan control circuit 43. The lower limit temperature comparison unit 432 and the upper limit temperature comparison unit 433 are respectively provided with a lower limit reference temperature T1 and an upper limit reference temperature T2, respectively, for which the above-mentioned working element temperatures T are respectively compared. At the same time, the reference power comparison unit 434 presets a reference power Pref for the above-mentioned working element power to be compared with. In the present embodiment, the current limiting element 431a refers to a current limiting resistor, and the lower limit temperature comparing unit 432, the upper limit temperature comparing unit 433 and the reference power comparing unit 434 are each a comparison amplifier. The control switch 435 is respectively connected to the power signal transmission circuit 431 and the lower limit temperature comparison unit 432, and has a closed circuit position 01, an open position 02 and a ground terminal G. The control gate 436 is connected to the upper limit temperature. The comparison unit 433 and the reference power comparison unit 434. The buffer circuit 437 is connected to the control switch 4%, which includes the amplifier and feedback circuit shown in Fig. 5. The weight adder 438 is connected to the control gate 436 and the buffer circuit 437. There is a set of matching weights W. In this embodiment, the set ratio weight w includes a first ratio weight W1 and a second ratio weight w2. When the fan control circuit 43 starts operating, the power The signal transmission circuit 431 transmits a first factor signal SA representing a first control factor A (in the embodiment, the working element power). Meanwhile, when the working element temperature τ is higher than the lower limit reference temperature T1, a signal is issued. Switching control signal S7, thereby switching control switch 435 to open position 02, and transmitting first factor signal SA, when the working element shirt T is lower than the lower limit reference temperature T1, issued The switch control signal S7 switches the control switch 435 to the closed circuit position 〇丨 so that the first factorization number SA is grounded sequentially via the closed circuit position 〇ι and the ground terminal g, in other words, the first transmission factor is not transmitted. A 'factor signal SA. In the present embodiment, a buffer circuit 437 is specifically connected between the control switch 435 and the weight adder 438, whereby the second factor signal SA is stably transmitted to the weight adder 438. After comparing the component temperature T with the upper limit reference temperature T2, a second factor signal SB representing a second control factor B is generated; after the working component power p is compared with the reference power pref, a third control factor is generated. One of the third factor signals SC. The control gate 436, in this embodiment, refers to a gate (〇R Gate) that is used to control the transmission of the second factor signal SB and the third factor signal SC. When the temperature τ is higher than the upper limit reference temperature ^ T2, the second factor signal SB is transmitted; when the working element Τ is lower than the upper limit reference temperature Τ 2, the first sub-signal SB is interrupted; when the working element power p is higher than the reference Power p In the case of ref, 1327261, the fan control system and the second figure show the functional block diagram of the working element fan in the other skill street; the third figure shows the functional block diagram of the first embodiment of the present invention; the fourth one (four) 1 a functional block diagram of the (four) '(four); the fifth figure shows the circuit diagram corresponding to the fourth figure;
第六圖係顯示本發明第二實施例之風扇控齡統電路功能 示意圖。Fig. 6 is a view showing the function of the fan age control circuit of the second embodiment of the present invention.
【主要元件符號說明】 1、 la 11 11a 12、 12a 13、 13a 2、 2a 3、 3a 4 41 42 43 431 431a 風扇控制系統 工作元件溫度偵測單元 工作元件功率偵測單元 處理單元 風扇控制電路 工作元件 風扇 風扇控制系統 工作元件溫度偵測單元 工作元件功率偵測單元 風扇控制電路 功率信號傳輸電路 限流元件 19 1327261[Main component symbol description] 1, la 11 11a 12, 12a 13, 13a 2, 2a 3, 3a 4 41 42 43 431 431a Fan control system working element temperature detection unit working element power detection unit processing unit fan control circuit work Component fan fan control system working element temperature detecting unit working element power detecting unit fan control circuit power signal transmission circuit current limiting component 19 1327261
432 下限溫度比較單元 433 上限溫度比較單元 434 限溫度比較單元 435 控制開關 436 控制閘 437 緩衝電路 438 權重加法器 439a 類比數位轉換電路 439b 處理單元 439c 數位類比轉換電路 5 工作元件 6 風扇 01 閉路位置 02 開路位置 G 接地端 SI 工作元件溫度信號 sr 工作元件功率信號 S2、S3 風扇控制信號 S4 工作元件溫度信號 S5 工作元件功率信號 S6 風扇控制信號 S7 開關控制信號 S7, 功率因子判斷信號 20 1327261 SA 第一因子信號 SB 第二因子信號 SC 第三因子信號 T 工作元件溫度 T1 下限參考溫度 T2 上限參考溫度 P 工作元件功率 Pref 參考功率432 Lower limit temperature comparison unit 433 Upper limit temperature comparison unit 434 Temperature limit comparison unit 435 Control switch 436 Control gate 437 Buffer circuit 438 Weight adder 439a Analog to digital conversion circuit 439b Processing unit 439c Digital analog conversion circuit 5 Working element 6 Fan 01 Closed position 02 Open circuit position G Ground terminal SI Working element temperature signal sr Working element power signal S2, S3 Fan control signal S4 Working element temperature signal S5 Working element power signal S6 Fan control signal S7 Switch control signal S7, Power factor determination signal 20 1327261 SA First Factor signal SB Second factor signal SC Third factor signal T Working element temperature T1 Lower limit reference temperature T2 Upper limit reference temperature P Working element power Pref Reference power
21twenty one