JP2020129645A - Apparatus, fan control method, and fan control program - Google Patents

Apparatus, fan control method, and fan control program Download PDF

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JP2020129645A
JP2020129645A JP2019022651A JP2019022651A JP2020129645A JP 2020129645 A JP2020129645 A JP 2020129645A JP 2019022651 A JP2019022651 A JP 2019022651A JP 2019022651 A JP2019022651 A JP 2019022651A JP 2020129645 A JP2020129645 A JP 2020129645A
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temperature difference
temperature
fan
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真巳 矢部
Masami Yabe
真巳 矢部
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NEC Corp
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Abstract

To provide an apparatus that can cool a device equipped with a heating element according to heat generated by the heating element, and prevent adverse effects due to fluctuations in the rotation speed of a fan that cools the device, a fan control method, and a fan control program.SOLUTION: An apparatus 10 according to the present invention calculates a temperature difference between a temperature measured by a first temperature sensor 11 arranged upstream of an air flow generated by a fan and a temperature measured by a second temperature sensor 12 arranged downstream of the air flow, and generates temperature difference information indicating the temperature difference. Next, the apparatus 10 determines whether a difference between a first temperature difference indicated by first temperature difference information and a second temperature difference indicated by second temperature difference information generated before the generation of the first temperature difference information is a threshold or more, and calculates a control value for controlling the rotation speed of the fan on the basis of the determination result, generates a control signal using the control value, and supplies the control signal to the fan.SELECTED DRAWING: Figure 1

Description

本発明は、装置、ファン制御方法及びファン制御プログラムに関し、特に、ファンを制御することが可能な装置、ファン制御方法及びファン制御プログラムに関する。 The present invention relates to an apparatus, a fan control method, and a fan control program, and more particularly, to an apparatus capable of controlling a fan, a fan control method, and a fan control program.

従来、電子機器等の様々な装置を冷却するために、ファンを利用した種々の冷却方法が提案されている。例えば、特許文献１が開示する屋外用表示装置では、環境温度及び吸気口の温度を検出する温度センサと、排気口の温度を検出するセンサとを備え、これらのセンサで検出した温度の差分値を算出し、当該温度及び環境温度に基づいて排気ファンの回転速度を決定する。 Conventionally, various cooling methods using a fan have been proposed to cool various devices such as electronic devices. For example, the outdoor display device disclosed in Patent Document 1 includes a temperature sensor that detects the ambient temperature and the temperature of the intake port, and a sensor that detects the temperature of the exhaust port, and the difference value of the temperatures detected by these sensors. Is calculated, and the rotation speed of the exhaust fan is determined based on the temperature and the environmental temperature.

特開２０１４−１７０２１５号公報JP, 2014-170215, A

しかしながら、特許文献１が開示する屋外用表示装置が採用する冷却方法では、ファンによって筐体内の温度が低下した場合、温度制御用ファクタＦの値が閾値ｔｈ１以下となり、ファンの回転数が「小」に変更される。その結果、筐体内の温度が次第に上昇した場合、温度制御用ファクタＦの値が閾値ｔｈ１を超え、ファンの回転数が「中」に変更される。その結果、筐体内の温度が次第に低下し、温度制御用ファクタＦの値が閾値ｔｈ１を下回り、ファンの回転数が「小」に変更される。すなわち、この冷却方法では、ファンの回転数が「小」と「中」を繰り返すことにより、鳴動やうねり音を発生させる虞があるという問題があった。 However, in the cooling method adopted by the outdoor display device disclosed in Patent Document 1, when the temperature inside the housing is lowered by the fan, the value of the temperature control factor F becomes equal to or less than the threshold value th1, and the rotation speed of the fan is "small." Is changed to ". As a result, when the temperature inside the housing gradually rises, the value of the temperature control factor F exceeds the threshold value th1, and the rotation speed of the fan is changed to “medium”. As a result, the temperature in the housing gradually decreases, the value of the temperature control factor F falls below the threshold value th1, and the rotation speed of the fan is changed to "small". That is, in this cooling method, there is a problem in that the number of rotations of the fan repeats "small" and "medium", which may cause ringing or swelling noise.

本発明の目的は、上述した課題を鑑み、発熱体が発生させた熱に応じて当該発熱体を備える装置を冷却することができると共に、当該装置を冷却するファンの回転数の変動による弊害を防止することが可能な装置、ファン制御方法及びファン制御プログラムを提供することにある。 In view of the above-mentioned problems, an object of the present invention is to cool an apparatus including the heating element according to the heat generated by the heating element, and to prevent an adverse effect due to fluctuations in the rotation speed of a fan that cools the apparatus. An object of the present invention is to provide a device, a fan control method, and a fan control program that can prevent this.

本発明の装置は、発熱体と、気流を発生させて前記発熱体を冷却するファンの回転数を制御するファン制御部と、前記発熱体よりも前記気流の上流側に配置された第１の温度センサと、前記発熱体よりも前記気流の下流側に配置された第２の温度センサと、前記第１の温度センサが計測した温度と、前記第２の温度センサが計測した温度との温度差を算出し、前記温度差を示す温度差情報を生成して前記ファン制御部に提供する温度差算出部とを備える。前記ファン制御部は、前記温度差算出部から受信した第１の温度差情報と、前記第１の温度差情報の受信前に受信した第２の温度差情報を保存する温度差保持部と、前記第１の温度差情報の示す第１の温度差と、前記第２の温度差情報の示す第２の温度差との差が閾値以上であるか否か判断し、その結果に基づいて前記第１の温度差情報及び前記第２の温度差情報のいずれか一方を出力する温度差情報選択部と、前記温度差情報選択部が出力した前記第１の温度差情報又は前記第２の温度差情報に基づき、前記ファンの回転数を制御するための制御値を算出する制御値算出部と、前記制御値を用いて前記ファンの回転数を制御するための制御信号を生成し、前記ファンに提供する制御信号生成部とを含む。前記温度差情報選択部は、前記第１の温度差と前記第２の温度差との差が閾値以上である場合は、前記第１の温度差情報を前記制御値算出部に提供し、前記第１の温度差と前記第２の温度差との差が閾値未満である場合は、前記第２の温度差情報を前記制御値算出部に提供する。 The apparatus of the present invention includes a heating element, a fan control unit that controls the rotation speed of a fan that generates an air flow and cools the heating element, and a first heating element that is disposed upstream of the heating element with respect to the air flow. A temperature sensor, a second temperature sensor arranged on the downstream side of the air flow with respect to the heating element, a temperature measured by the first temperature sensor, and a temperature measured by the second temperature sensor. And a temperature difference calculation unit that calculates the difference, generates temperature difference information indicating the temperature difference, and provides the temperature difference information to the fan control unit. The fan control unit stores a first temperature difference information received from the temperature difference calculation unit and a temperature difference holding unit that stores the second temperature difference information received before receiving the first temperature difference information, It is determined whether or not the difference between the first temperature difference indicated by the first temperature difference information and the second temperature difference indicated by the second temperature difference information is equal to or more than a threshold value, and based on the result, A temperature difference information selection unit that outputs either one of the first temperature difference information and the second temperature difference information, and the first temperature difference information or the second temperature output by the temperature difference information selection unit. A control value calculation unit for calculating a control value for controlling the rotation speed of the fan based on the difference information; and a control signal for controlling the rotation speed of the fan using the control value, And a control signal generator provided to the. When the difference between the first temperature difference and the second temperature difference is equal to or greater than a threshold value, the temperature difference information selection unit provides the first temperature difference information to the control value calculation unit, When the difference between the first temperature difference and the second temperature difference is less than the threshold value, the second temperature difference information is provided to the control value calculation unit.

本発明により、発熱体が発生させた熱に応じて当該発熱体を備える装置を冷却することができると共に、当該装置を冷却するファンの回転数の変動による弊害を防止することが可能な装置、ファン制御方法及びファン制御プログラムを提供することができる。 According to the present invention, it is possible to cool a device including the heating element according to the heat generated by the heating element, and to prevent an adverse effect due to fluctuations in the rotation speed of a fan that cools the device. A fan control method and a fan control program can be provided.

本発明の第１の実施形態に係る装置の構成を示すブロック図である。It is a block diagram which shows the structure of the apparatus which concerns on the 1st Embodiment of this invention. 本発明の第１の実施形態に係るファン制御部の構成を示すブロック図である。It is a block diagram which shows the structure of the fan control part which concerns on the 1st Embodiment of this invention. 本発明の第１の実施形態に係る装置の主要な構成要素を示すブロック図である。It is a block diagram which shows the main components of the apparatus which concerns on the 1st Embodiment of this invention. 本発明の第１の実施形態に係る装置が実行する処理を示すフローチャートである。It is a flow chart which shows processing which a device concerning a 1st embodiment of the present invention performs. 第１の温度センサが計測した温度ＴＢと第２の温度センサが計測した温度ＴＣとの関係を示す図である。It is a figure which shows the relationship between temperature T B which the 1st temperature sensor measured and temperature T C which the 2nd temperature sensor measured. ファンの回転数と制御値Ｓｃｏｎｔとの関係を示す図である。It is a figure which shows the relationship between the rotation speed of a fan, and control value Scont . 温度ＴＣとファンの回転数との関係を示す図である。Is a graph showing the relationship between the temperature T C and the rotational speed of the fan. 温度ＴＣとファンの回転数と制御値Ｓｃｏｎｔとの関係を示す図である。Is a diagram showing the relationship between the temperature T C and the rotational speed of the fan and the control value S cont. 本発明の第２の実施形態に係るファン制御部の構成を示すブロック図である。It is a block diagram which shows the structure of the fan control part which concerns on the 2nd Embodiment of this invention.

＜第１の実施形態＞
以下、図面を参照して本発明の第１の実施形態について説明する。図１は、装置１０の構成を示すブロック図である。装置１０は、装置１０の内部に気流を発生させるファン（図示せず）の回転数を制御して発熱体２０を冷却することが可能な装置である。装置１０の具体例として、通信装置や電子機器等の種々の装置が挙げられる。ファンは、装置１０の外周部に配置され、吸込型や吹出型等の任意の種類のファンを使用することができる。装置１０は、温度センサ１１，１２と、温度差算出部１３と、ファン制御部１４とを備えており、温度差算出部１３及びファン制御部１４が、本発明のファン制御プログラムを実行することにより、本発明のファン制御方法を実行する。 <First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the device 10. The device 10 is a device capable of cooling the heating element 20 by controlling the rotation speed of a fan (not shown) that generates an air flow inside the device 10. Specific examples of the device 10 include various devices such as communication devices and electronic devices. The fan is arranged on the outer peripheral portion of the device 10, and any type of fan such as a suction type and a blow type can be used. The device 10 includes temperature sensors 11 and 12, a temperature difference calculation unit 13, and a fan control unit 14, and the temperature difference calculation unit 13 and the fan control unit 14 execute the fan control program of the present invention. Thus, the fan control method of the present invention is executed.

温度センサ１１は、装置１０内の温度を計測するセンサである。温度センサ１１は、装置１０の外周部に設けられた空気の流入口（図示せず）の近くであって、発熱体２０よりも上流側に配置される。このため、温度センサ１１が計測する温度ＴＢは、装置１０内に流入する空気の温度ＴＡと実質的に同じになる。温度センサ１１は、所定のタイミングで温度を計測し、計測した温度ＴＢを示す温度情報を温度差算出部１３に提供する。 The temperature sensor 11 is a sensor that measures the temperature inside the device 10. The temperature sensor 11 is arranged near the air inlet (not shown) provided on the outer peripheral portion of the device 10 and on the upstream side of the heating element 20. Therefore, the temperature T B measured by the temperature sensor 11 becomes substantially the same as the temperature T A of the air flowing into the device 10. The temperature sensor 11 measures the temperature at a predetermined timing and provides the temperature difference calculator 13 with temperature information indicating the measured temperature T B.

温度センサ１２は、装置１０内の温度を計測するセンサである。温度センサ１２は、装置１０の外周部に設けられた空気の排出口（図示せず）の近くであって、発熱体２０よりも下流側に配置される。このため、発熱体２０が熱を発生させている場合、温度センサ１２が計測する温度ＴＣは、装置１０内に流入する空気の温度ＴＡに対し、この熱によって上昇した装置１０の温度を加えた温度（ＴＡ＋ΔＴ）になる。温度センサ１２は、所定のタイミングで温度を計測し、計測した温度ＴＣを示す温度情報を温度差算出部１３に提供する。なお、温度センサ１１が温度を計測して温度情報を温度差算出部１３に提供するタイミングと、温度センサ１２が温度を計測して温度情報を温度差算出部１３に提供するタイミングは、実質的に同一であることが好ましい。 The temperature sensor 12 is a sensor that measures the temperature inside the device 10. The temperature sensor 12 is arranged near the air outlet (not shown) provided on the outer peripheral portion of the device 10 and on the downstream side of the heating element 20. Therefore, when the heating element 20 is generating heat, the temperature T C measured by the temperature sensor 12 is the temperature of the device 10 increased by the heat with respect to the temperature T A of the air flowing into the device 10. It becomes the added temperature (T A +ΔT). The temperature sensor 12 measures the temperature at a predetermined timing, and provides the temperature difference calculator 13 with temperature information indicating the measured temperature T C. The timing when the temperature sensor 11 measures the temperature and provides the temperature information to the temperature difference calculation unit 13 and the timing when the temperature sensor 12 measures the temperature and provides the temperature information to the temperature difference calculation unit 13 are substantially the same. Are preferably the same.

温度差算出部１３は、温度センサ１１が計測した温度ＴＢと、温度センサ１２が計測した温度ＴＣとの温度差ΔＴを算出し、当該温度差ΔＴを示す温度差情報を生成してファン制御部１４に提供する電子回路である。温度差算出部１３は、温度ＴＣから温度ＴＢを減算することにより、温度差ΔＴを算出することができる。発熱体２０が熱を発生させている場合、温度差ΔＴは、この熱によって上昇した装置１０内の温度と実質的に同じになる。一方、発熱体２０が熱を発生させていない場合、温度差ΔＴは、実質的に０になる。 The temperature difference calculation unit 13 calculates a temperature difference ΔT between the temperature T B measured by the temperature sensor 11 and the temperature T C measured by the temperature sensor 12, and generates temperature difference information indicating the temperature difference ΔT to generate a fan. It is an electronic circuit provided to the control unit 14. The temperature difference calculation unit 13 can calculate the temperature difference ΔT by subtracting the temperature T B from the temperature T C. When the heating element 20 is generating heat, the temperature difference ΔT becomes substantially the same as the temperature in the device 10 increased by this heat. On the other hand, when the heating element 20 does not generate heat, the temperature difference ΔT becomes substantially zero.

ファン制御部１４は、発熱体２０を冷却するファンの回転数を制御する電子回路である。以下、図２を参照して、ファン制御部１４が有する機能の詳細について説明する。ファン制御部１４は、受信部１４０と、温度差保持部１４１と、温度差情報選択部１４２と、制御値算出部１４３と、制御信号生成部１４４とを備える。 The fan control unit 14 is an electronic circuit that controls the rotation speed of a fan that cools the heating element 20. Details of the functions of the fan control unit 14 will be described below with reference to FIG. The fan control unit 14 includes a reception unit 140, a temperature difference holding unit 141, a temperature difference information selection unit 142, a control value calculation unit 143, and a control signal generation unit 144.

受信部１４０は、温度差算出部１３が提供した温度差情報を受信する電子回路である。温度差算出部１３がアナログ情報の温度差情報を提供する実施形態では、受信部１４０は、当該温度差情報をＡ／Ｄ変換した後、温度差保持部１４１及び温度差情報選択部１４２に提供する。なお、温度差算出部１３がデジタル情報の温度差情報を提供する実施形態では、受信部１４０は、温度差情報のＡ／Ｄ変換を行うことなく、温度差保持部１４１及び温度差情報選択部１４２に温度差情報を提供する。 The receiving unit 140 is an electronic circuit that receives the temperature difference information provided by the temperature difference calculating unit 13. In the embodiment in which the temperature difference calculation unit 13 provides the temperature difference information of the analog information, the reception unit 140 provides the temperature difference holding unit 141 and the temperature difference information selection unit 142 after A/D converting the temperature difference information. To do. In the embodiment in which the temperature difference calculation unit 13 provides the temperature difference information of the digital information, the reception unit 140 does not perform the A/D conversion of the temperature difference information, and the temperature difference holding unit 141 and the temperature difference information selection unit. The temperature difference information is provided to 142.

温度差保持部１４１は、受信部１４０から受信した温度差情報を温度差保持部１４１の備える記憶装置に保存して保持する電子回路である。温度差保持部１４１は、受信タイミングの異なる２つの温度差情報を保持することができる。温度差保持部１４１は、温度差情報（以下、「第１の温度差情報」とする。）を受信すると、当該温度差情報の受信前に受信した先の温度差情報（以下、「第２の温度差情報」とする。）を温度差情報選択部１４２に提供する。 The temperature difference holding unit 141 is an electronic circuit that stores and holds the temperature difference information received from the receiving unit 140 in a storage device included in the temperature difference holding unit 141. The temperature difference holding unit 141 can hold two pieces of temperature difference information having different reception timings. When the temperature difference holding unit 141 receives the temperature difference information (hereinafter, referred to as “first temperature difference information”), the temperature difference information (hereinafter, referred to as “second temperature difference information” received before the temperature difference information is received. Temperature difference information”) is provided to the temperature difference information selection unit 142.

温度差情報選択部１４２は、受信部１４０から受信した第１の温度差情報の示す第１の温度差と、温度差保持部１４１から受信した第２の温度差情報の示す第２の温度差との差が閾値ｍ以上であるか否か判断し、その結果に基づいて第１の温度差情報及び第２の温度差情報のいずれか一方を出力する電子回路である。具体的には、第１の温度差と第２の温度差との差が閾値ｍ以上である場合、すなわち、最新の温度差と先の温度差との差が、ファンの回転数の増減を必要とする程度である場合、温度差情報選択部１４２は、第１の温度差情報を制御値算出部１４３に提供する。一方、第１の温度差と第２の温度差との差が閾値ｍ未満である場合、すなわち、最新の温度差と先の温度差との差が、ファンの回転数の増減を必要としない程度である場合、温度差情報選択部１４２は、第２の温度差情報を制御値算出部１４３に提供する。なお、閾値ｍは、ファンの回転数の増減によって変化する装置１０内の温度を考慮して決定することが好ましい。 The temperature difference information selection unit 142 includes a first temperature difference indicated by the first temperature difference information received from the reception unit 140 and a second temperature difference indicated by the second temperature difference information received from the temperature difference holding unit 141. It is an electronic circuit that determines whether or not the difference between and is greater than or equal to a threshold value m, and outputs either one of the first temperature difference information and the second temperature difference information based on the result. Specifically, when the difference between the first temperature difference and the second temperature difference is greater than or equal to the threshold value m, that is, the difference between the latest temperature difference and the previous temperature difference causes an increase/decrease in the rotation speed of the fan. When it is a necessary degree, the temperature difference information selection unit 142 provides the first temperature difference information to the control value calculation unit 143. On the other hand, when the difference between the first temperature difference and the second temperature difference is less than the threshold value m, that is, the difference between the latest temperature difference and the previous temperature difference does not require an increase or decrease in the rotation speed of the fan. In the case of the degree, the temperature difference information selection unit 142 provides the second temperature difference information to the control value calculation unit 143. The threshold value m is preferably determined in consideration of the temperature inside the device 10 that changes as the number of rotations of the fan increases and decreases.

制御値算出部１４３は、温度差情報選択部１４２が出力した第１の温度差情報又は第２の温度差情報に基づき、ファンの回転数を制御するための制御値Ｓｃｏｎｔを算出する電子回路である。具体的には、制御値算出部１４３は、第１の温度差情報の示す温度差ΔＴ又は第２の温度差情報の示す温度差ΔＴを数式１に代入することにより、制御値Ｓｃｏｎｔを算出することができる。 The control value calculation unit 143 calculates the control value S cont for controlling the rotation speed of the fan based on the first temperature difference information or the second temperature difference information output by the temperature difference information selection unit 142. Is. Specifically, the control value calculation unit 143 calculates the control value S cont by substituting the temperature difference ΔT indicated by the first temperature difference information or the temperature difference ΔT indicated by the second temperature difference information into Formula 1. can do.

Figure 2020129645
ここで、図５〜図７を参照して、数式１の導出方法について説明する。図５は、温度センサ１１が計測した温度ＴＢと、温度センサ１２が計測した温度ＴＣとの関係を示す図である。温度センサ１１は、装置１０内に流入した直後の空気の温度を計測するため、ＴＢは、装置１０内に流入する空気の温度ＴＡと実質的に同じになる。一方、温度センサ１２は、装置１０から排出される直前の空気の温度を計測するため、ＴＣは、発熱体２０が発生させた熱によって値が異なる。具体的には、ＴＣは、発熱体２０が発生させた熱に応じて、例えば、ＴＣ２〜ＴＣ４のような温度になる。ΔＴ１〜Ｔ３は、それぞれ発熱体２０が発した熱によって上昇した装置１０内の温度と実質的に同じ値になる。発熱体２０が熱を発していない場合、ＴＣは、装置１０内に流入する空気の温度ＴＡと実質的に同じになる。図５に示す温度ＴＢと温度ＴＣとの関係から数式２を導出することができる。
Figure 2020129645
 Here, with reference to FIGS. 5 to 7, a method of deriving the formula 1 will be described. FIG. 5 is a diagram showing the relationship between the temperature T B measured by the temperature sensor 11 and the temperature T C measured by the temperature sensor 12. Since the temperature sensor 11 measures the temperature of the air immediately after flowing into the device 10, T B becomes substantially the same as the temperature T A of the air flowing into the device 10. On the other hand, since the temperature sensor 12 measures the temperature of the air immediately before being discharged from the device 10, the value of T C varies depending on the heat generated by the heating element 20. Specifically, T C becomes a temperature such as T C2 to T C4 depending on the heat generated by the heating element 20. Each of ΔT 1 to T 3 becomes substantially the same value as the temperature in the device 10 increased by the heat generated by the heating element 20. If the heating element 20 is not producing heat, T C will be substantially the same as the temperature T A of the air flowing into the device 10. Equation 2 can be derived from the relationship between the temperature T B and the temperature T C shown in FIG.

Figure 2020129645
Figure 2020129645

図６は、ファンの回転数（ＲＰＭ：Rotations Per Minute）と制御値Ｓｃｏｎｔとの関係を示す図である。本実施形態では、図６に示すように、ファンの回転数が制御値Ｓｃｏｎｔに比例するように、制御値Ｓｃｏｎｔを決定する。図６に示すファンの回転数と制御値Ｓｃｏｎｔとの関係から数式３を導出することができる。 FIG. 6 is a diagram showing the relationship between the rotation speed (RPM: Rotations Per Minute) of the fan and the control value S cont . In the present embodiment, as shown in FIG. 6, as the rotational speed of the fan is proportional to the control value S cont, determines a control value S cont. Equation 3 can be derived from the relationship between the rotation speed of the fan and the control value S cont shown in FIG.

Figure 2020129645
数式３に示すαは比例係数である。比例係数αは、ファンの性能や発熱体２０の発熱量に応じて決定することができる。
Figure 2020129645
 Α in Equation 3 is a proportional coefficient. The proportionality coefficient α can be determined according to the performance of the fan and the heat generation amount of the heating element 20.

図７は、温度センサ１２が計測した温度ＴＣとファンの回転数との関係を示す図である。温度ＴＣの上昇に伴って装置１０を冷却する必要があるため、ファンの回転数は、温度ＴＣに比例する。図７に示す温度ＴＣとファンの回転数との関係から数式４を導出することができる。 FIG. 7 is a diagram showing the relationship between the temperature T C measured by the temperature sensor 12 and the rotation speed of the fan. Since it is necessary to cool the device 10 as the temperature T C rises, the rotation speed of the fan is proportional to the temperature T C. Equation 4 can be derived from the relationship between the temperature T C and the rotation speed of the fan shown in FIG. 7.

Figure 2020129645
数式４に示すβは比例係数である。比例係数βは、ファンの性能や発熱体２０の発熱量に応じて決定することができる。
Figure 2020129645
 Β in Equation 4 is a proportional coefficient. The proportionality coefficient β can be determined according to the performance of the fan and the heat generation amount of the heating element 20.

上述した数式２〜数式４から数式１を導出することができる。制御値算出部１４３は、数式１を用いて制御値Ｓｃｏｎｔを算出すると、当該制御値Ｓｃｏｎｔを制御信号生成部１４４に提供する。なお、温度ＴＣとファンの回転数と制御値Ｓｃｏｎｔとの関係を表すと、図８のようになる。 Expression 1 can be derived from Expressions 2 to 4 described above. When the control value calculation unit 143 calculates the control value S cont using Formula 1, the control value calculation unit 143 provides the control value S cont to the control signal generation unit 144. The relationship between the temperature T C , the rotation speed of the fan, and the control value S cont is shown in FIG.

制御信号生成部１４４は、制御値算出部１４３から受信した制御値Ｓｃｏｎｔを用いて、ファンの回転数を制御するための制御信号を生成する電子回路である。制御信号の具体例としては、Ｉ２Ｃ（Inter Integrated Circuit）信号やＳＰＩ（Serial Peripheral Interface）信号等のシリアル通信信号、パルス幅変調（ＰＷＭ）信号、電圧制御信号などが挙げられる。制御信号生成部１４４は、制御値Ｓｃｏｎｔを含む制御信号を生成すると、当該制御信号をファンに提供する。 The control signal generation unit 144 is an electronic circuit that uses the control value S cont received from the control value calculation unit 143 to generate a control signal for controlling the rotation speed of the fan. Specific examples of the control signal include serial communication signals such as I2C (Inter Integrated Circuit) signals and SPI (Serial Peripheral Interface) signals, pulse width modulation (PWM) signals, and voltage control signals. When the control signal generation unit 144 generates the control signal including the control value S cont , the control signal generation unit 144 provides the control signal to the fan.

図３は、本発明の第１の実施形態に係る装置１０の主要な構成要素を示すブロック図である。装置１０は、主要な構成要素として温度センサ１１，１２と、温度差算出部１３と、ファン制御部１４と、発熱体２０とを備える。 FIG. 3 is a block diagram showing main components of the device 10 according to the first embodiment of the present invention. The device 10 includes temperature sensors 11 and 12, a temperature difference calculation unit 13, a fan control unit 14, and a heating element 20 as main components.

図４は、第１の実施形態に係る装置１０の温度差算出部１３及びファン制御部１４が実行する処理を示すフローチャートである。図４に示す処理は、ファン制御部１４の受信部１４０が、温度差算出部１３から温度差ΔＴｎを示す第１の温度差情報を受信することによって開始する。ステップＳ１０１では、受信部１４０は、当該第１の温度差情報を温度差保持部１４１及び温度差情報選択部１４２に提供する。ステップＳ１０２では、温度差保持部１４１が、当該第１の温度差情報を温度差保持部１４１の記憶装置に保存する。ステップＳ１０３では、温度差保持部１４１は、温度差保持部１４１の記憶装置に保存されているΔＴｎ-１を示す第２の温度差情報を温度差情報選択部１４２に提供する。 FIG. 4 is a flowchart showing processing executed by the temperature difference calculation unit 13 and the fan control unit 14 of the device 10 according to the first embodiment. The process illustrated in FIG. 4 is started when the receiving unit 140 of the fan control unit 14 receives the first temperature difference information indicating the temperature difference ΔT n from the temperature difference calculating unit 13. In step S101, the receiving unit 140 provides the first temperature difference information to the temperature difference holding unit 141 and the temperature difference information selecting unit 142. In step S102, the temperature difference holding unit 141 saves the first temperature difference information in the storage device of the temperature difference holding unit 141. In step S103, the temperature difference holding unit 141 provides the temperature difference information selection unit 142 with the second temperature difference information indicating ΔT n-1 stored in the storage device of the temperature difference holding unit 141.

ステップＳ１０４では、温度差情報選択部１４２は、第１の温度差情報の示す第１の温度差ΔＴｎと第２の温度差情報の示す第２の温度差ΔＴｎ-１との差の絶対値が閾値ｍ以上であるか否か判断する。第１の温度差ΔＴｎと第２の温度差ΔＴｎ-１との差の絶対値が閾値ｍ以上である場合（ＹＥＳ）、ステップＳ１０５において温度差情報選択部１４２は、第１の温度差情報を制御値算出部１４３に提供する。一方、第１の温度差ΔＴｎと第２の温度差ΔＴｎ-１との差の絶対値が閾値ｍ未満である場合（ＮＯ）、ステップＳ１０６において温度差情報選択部１４２は、第２の温度差情報を制御値算出部１４３に提供する。 In step S104, the temperature difference information selection section 142, the absolute of the difference between the second and the temperature difference [Delta] T n-1 indicated by the first temperature difference [Delta] T n and the second temperature difference information for indicating the first temperature difference information It is determined whether the value is greater than or equal to the threshold value m. If the absolute value of the difference between the first temperature difference ΔT n and the second temperature difference ΔT n-1 is greater than or equal to the threshold value m (YES), the temperature difference information selection unit 142 determines in step S105 that the first temperature difference is ΔT n-1. The information is provided to the control value calculation unit 143. On the other hand, if the absolute value of the difference between the first temperature difference ΔT n and the second temperature difference ΔT n-1 is less than the threshold value m (NO), the temperature difference information selection unit 142 determines in step S106 that The temperature difference information is provided to the control value calculation unit 143.

ステップＳ１０７では、制御値算出部１４３が、温度差情報選択部１４２から受信した温度差情報の示す温度差を上記数式１に代入して制御値Ｓｃｏｎｔを算出する。ステップＳ１０８では、制御信号生成部１４４が、制御値算出部１４３から受信した制御値Ｓｃｏｎｔを用いて制御信号を生成する。ステップＳ１０９では、制御信号生成部１４４が、当該制御信号をファンに送信し、図４の処理が終了する。 In step S107, the control value calculating unit 143 calculates the control value S cont by substituting the temperature difference indicated by the temperature difference information received from the temperature difference information selecting unit 142 into Equation 1 above. In step S108, the control signal generation unit 144 generates a control signal using the control value S cont received from the control value calculation unit 143. In step S109, the control signal generation unit 144 transmits the control signal to the fan, and the processing of FIG. 4 ends.

本発明の第１の実施形態は、以下の効果を奏する。上述したように、温度差情報選択部１４２は、第１の温度差ΔＴｎと第２の温度差ΔＴｎ-１との差の絶対値が閾値ｍ以上であるか否か判断する。第１の温度差ΔＴｎと第２の温度差ΔＴｎ-１との差の絶対値が閾値ｍ以上である場合、すなわち、最新の温度差ΔＴｎと先の温度差ΔＴｎ-１との差が、ファンの回転数の増減を必要とする程度である場合、制御値算出部１４３が、第２の温度差ΔＴｎを用いて制御値Ｓｃｏｎｔを算出し、制御信号生成部１４４が、当該制御値Ｓｃｏｎｔを用いて制御信号を生成してファンに送信する。これにより、装置１０は、発熱体２０が発生させた熱に応じて、発熱体２０を冷却することができる。その結果、ファンの過剰な回転による電力消費を抑制することができると共に、ファンが発生する騒音を軽減することができる。 The first embodiment of the present invention has the following effects. As described above, the temperature difference information selection unit 142 determines whether the absolute value of the difference between the first temperature difference ΔT n and the second temperature difference ΔT n−1 is the threshold m or more. When the absolute value of the difference between the first temperature difference ΔT n and the second temperature difference ΔT n-1 is greater than or equal to the threshold value m, that is, the latest temperature difference ΔT n and the previous temperature difference ΔT n-1 . When the difference is such that the fan rotation speed needs to be increased or decreased, the control value calculation unit 143 calculates the control value S cont using the second temperature difference ΔT n , and the control signal generation unit 144 A control signal is generated using the control value S cont and transmitted to the fan. Accordingly, the device 10 can cool the heating element 20 according to the heat generated by the heating element 20. As a result, power consumption due to excessive rotation of the fan can be suppressed, and noise generated by the fan can be reduced.

第１の温度差ΔＴｎと第２の温度差ΔＴｎ-１との差の絶対値が閾値ｍ未満である場合、すなわち、最新の温度差ΔＴｎと先の温度差ΔＴｎ-１との差が、ファンの回転数の増減を必要としない程度である場合、制御値算出部１４３は、第２の温度差ΔＴｎ-１を用いて制御値Ｓｃｏｎｔを算出し、制御信号生成部１４４は、当該制御値Ｓｃｏｎｔを用いて制御信号を生成してファンに送信する。これにより、ファンの回転数を増減させる必要がない場合、制御信号生成部１４４は、先に送信した制御信号と同一の制御信号をファンに送信するため、ファンの回転数の変動による鳴動やうねり音等の弊害を防止することができる。 When the absolute value of the difference between the first temperature difference ΔT n and the second temperature difference ΔT n-1 is less than the threshold value m, that is, between the latest temperature difference ΔT n and the previous temperature difference ΔT n-1 . When the difference does not require increase or decrease in the rotation speed of the fan, the control value calculation unit 143 calculates the control value S cont using the second temperature difference ΔT n−1 , and the control signal generation unit 144. Generates a control signal using the control value S cont and sends it to the fan. As a result, when it is not necessary to increase or decrease the rotation speed of the fan, the control signal generation unit 144 transmits the same control signal as the previously transmitted control signal to the fan, so that the ringing or swelling due to the fluctuation of the rotation speed of the fan occurs. It is possible to prevent harmful effects such as sound.

＜第２の実施形態＞
本発明の第２の実施形態に係るファン制御部１４の構成を示すブロック図である。第２の実施形態では、ファン制御部１４は、上述した受信部１４０、温度差保持部１４１、温度差情報選択部１４２、制御値算出部１４３及び制御信号生成部１４４に加え、演算装置１４５を備える。演算装置１４５の具体例としては、ＣＰＵ（Central Processing Unit）等の種々の演算装置が挙げられる。 <Second Embodiment>
It is a block diagram which shows the structure of the fan control part 14 which concerns on the 2nd Embodiment of this invention. In the second embodiment, the fan control unit 14 includes an arithmetic unit 145 in addition to the reception unit 140, the temperature difference holding unit 141, the temperature difference information selection unit 142, the control value calculation unit 143, and the control signal generation unit 144 described above. Prepare Specific examples of the arithmetic device 145 include various arithmetic devices such as a CPU (Central Processing Unit).

演算装置１４５は、受信部１４０から受信した温度差情報を保存するタイミングを規定するタイミング情報を温度差保持部１４１に提供することができる。温度差情報を保存するタイミングは、温度差情報の受信タイミングと同期させることが好ましい。温度差保持部１４１は、当該タイミング情報が規定するタイミングに従って温度差情報を保存する。また、演算装置１４５は、閾値ｍを温度差情報選択部１４２に提供すると共に、比例係数α及びβを制御値算出部１４３に提供することができる。 The arithmetic device 145 can provide the temperature difference holding unit 141 with timing information that defines the timing for storing the temperature difference information received from the receiving unit 140. The timing for storing the temperature difference information is preferably synchronized with the reception timing for the temperature difference information. The temperature difference holding unit 141 stores the temperature difference information according to the timing defined by the timing information. Further, the arithmetic device 145 can provide the threshold value m to the temperature difference information selection unit 142 and the proportional coefficients α and β to the control value calculation unit 143.

本発明の第２の実施形態では、演算装置１４５がタイミング情報、閾値ｍ及び比例係数α及びβを提供するため、種々の値のタイミング情報、閾値ｍ及び比例係数α及びβを指定することができる。これにより、ファンによる装置１０の冷却状況に応じてファンを制御し、装置１０の冷却の程度を柔軟に調節することができる。 In the second embodiment of the present invention, since the arithmetic device 145 provides the timing information, the threshold value m, and the proportional coefficients α and β, it is possible to specify various values of the timing information, the threshold value m, and the proportional coefficients α and β. it can. Accordingly, the fan can be controlled according to the cooling status of the device 10 by the fan, and the degree of cooling of the device 10 can be flexibly adjusted.

＜その他の実施形態＞
上述した実施形態では、温度差保持部１４１及び温度差情報選択部１４２が、受信部１４０から温度差情報を受信するが、他の実施形態では、受信部１４０を省略し、温度差保持部１４１及び温度差情報選択部１４２が、温度差算出部１３から温度差情報を直接受信する構成としてもよい。 <Other embodiments>
In the above-described embodiment, the temperature difference holding unit 141 and the temperature difference information selection unit 142 receive the temperature difference information from the receiving unit 140, but in other embodiments, the receiving unit 140 is omitted and the temperature difference holding unit 141 is omitted. The temperature difference information selection unit 142 may directly receive the temperature difference information from the temperature difference calculation unit 13.

また、上述した実施形態では、温度差算出部１３及びファン制御部１４が、本発明のファン制御プログラムを実行することにより、本発明のファン制御方法を実行するが、他の実施形態では、装置１０の備えるＣＰＵ等の演算装置が、本発明のファン制御プログラムを実行することにより、本発明のファン制御方法を実行してもよい。 Further, in the above-described embodiment, the temperature difference calculation unit 13 and the fan control unit 14 execute the fan control method of the present invention by executing the fan control program of the present invention, but in other embodiments, the device is used. An arithmetic unit such as a CPU included in 10 may execute the fan control program of the present invention to execute the fan control method of the present invention.

さらに、他の実施形態では、装置１０が３つ以上の温度センサを備えてもよい。この場合、温度差算出部１３は、各温度センサが計測した温度のうち最大値及び最小値を用いて、温度差を算出することができる。さらに、装置１０は、温度センサの代わりに、発熱量を計測するセンサを備えてもよい。 Furthermore, in other embodiments, the device 10 may include more than two temperature sensors. In this case, the temperature difference calculation unit 13 can calculate the temperature difference using the maximum value and the minimum value of the temperatures measured by the temperature sensors. Further, the device 10 may include a sensor that measures the amount of heat generation, instead of the temperature sensor.

上述の例において、プログラムは、様々なタイプの非一時的なコンピュータ可読媒体（non-transitory computer readable medium）を用いて格納され、コンピュータに提供することができる。非一時的なコンピュータ可読媒体は、様々なタイプの実体のある記録媒体（tangible storage medium）を含む。非一時的なコンピュータ可読媒体の例は、磁気記録媒体（例えば、フレキシブルディスク、磁気テープ、ハードディスクドライブ）、光磁気記録媒体（例えば、光磁気ディスク）、ＣＤ−ＲＯＭ、ＣＤ−Ｒ、ＣＤ−Ｒ／Ｗ、半導体メモリ（例えば、マスクＲＯＭ、ＰＲＯＭ（Programmable ROM）、ＥＰＲＯＭ（Erasable PROM）、フラッシュＲＯＭ、ＲＡＭ）を含む。また、プログラムは、様々なタイプの一時的なコンピュータ可読媒体（transitory computer readable medium）によってコンピュータに提供されてもよい。一時的なコンピュータ可読媒体の例は、電気信号、光信号、及び電磁波を含む。一時的なコンピュータ可読媒体は、電線及び光ファイバ等の有線通信路、又は無線通信路を介して、プログラムをコンピュータに供給できる。 In the above example, the program can be stored in various types of non-transitory computer readable media and provided to the computer. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer readable media are magnetic recording media (eg, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg, magneto-optical disks), CD-ROMs, CD-Rs, CD-Rs. /W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM). In addition, the program may be provided to the computer by various types of transitory computer readable media. Examples of transitory computer-readable media include electrical signals, optical signals, and electromagnetic waves. The transitory computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

本発明は上述した実施形態に限られたものではなく、本発明の趣旨を逸脱しない範囲で適宜変更することが可能である。 The present invention is not limited to the above-described embodiments, but can be modified as appropriate without departing from the spirit of the present invention.

１０ 装置
１１，１２ 温度センサ
１３ 温度差算出部
１４ ファン制御部
１４０ 受信部
１４１ 温度差保持部
１４２ 温度差情報選択部
１４３ 制御値算出部
１４４ 制御信号生成部
２０ 発熱体 10 device 11, 12 temperature sensor 13 temperature difference calculation unit 14 fan control unit 140 reception unit 141 temperature difference holding unit 142 temperature difference information selection unit 143 control value calculation unit 144 control signal generation unit 20 heating element

Claims (6)

発熱体と、
気流を発生させて前記発熱体を冷却するファンの回転数を制御するファン制御部と、
前記発熱体よりも前記気流の上流側に配置された第１の温度センサと、
前記発熱体よりも前記気流の下流側に配置された第２の温度センサと、
前記第１の温度センサが計測した温度と、前記第２の温度センサが計測した温度との温度差を算出し、前記温度差を示す温度差情報を生成して前記ファン制御部に提供する温度差算出部とを備え、
前記ファン制御部は、
前記温度差算出部から受信した第１の温度差情報と、前記第１の温度差情報の受信前に受信した第２の温度差情報を保存する温度差保持部と、
前記第１の温度差情報の示す第１の温度差と、前記第２の温度差情報の示す第２の温度差との差が閾値以上であるか否か判断し、その結果に基づいて前記第１の温度差情報及び前記第２の温度差情報のいずれか一方を出力する温度差情報選択部と、
前記温度差情報選択部が出力した前記第１の温度差情報又は前記第２の温度差情報に基づき、前記ファンの回転数を制御するための制御値を算出する制御値算出部と、
前記制御値を用いて前記ファンの回転数を制御するための制御信号を生成し、前記ファンに提供する制御信号生成部とを含み、
前記温度差情報選択部は、
前記第１の温度差と前記第２の温度差との差が閾値以上である場合は、前記第１の温度差情報を前記制御値算出部に提供し、
前記第１の温度差と前記第２の温度差との差が閾値未満である場合は、前記第２の温度差情報を前記制御値算出部に提供する、
装置。 A heating element,
A fan control unit that controls the rotation speed of a fan that generates an air flow to cool the heating element;
A first temperature sensor arranged on the upstream side of the air flow with respect to the heating element;
A second temperature sensor arranged on the downstream side of the air flow with respect to the heating element;
A temperature difference between the temperature measured by the first temperature sensor and the temperature measured by the second temperature sensor is calculated, temperature difference information indicating the temperature difference is generated, and the temperature is provided to the fan controller. And a difference calculation unit,
The fan controller is
A first temperature difference information received from the temperature difference calculation unit, and a temperature difference holding unit that stores the second temperature difference information received before the reception of the first temperature difference information,
It is determined whether a difference between the first temperature difference indicated by the first temperature difference information and the second temperature difference indicated by the second temperature difference information is a threshold value or more, and based on the result, A temperature difference information selection unit that outputs one of the first temperature difference information and the second temperature difference information,
A control value calculation unit that calculates a control value for controlling the rotation speed of the fan based on the first temperature difference information or the second temperature difference information output by the temperature difference information selection unit;
A control signal generator for generating a control signal for controlling the rotation speed of the fan using the control value and providing the control signal to the fan;
The temperature difference information selection unit,
When the difference between the first temperature difference and the second temperature difference is greater than or equal to a threshold value, the first temperature difference information is provided to the control value calculation unit,
When the difference between the first temperature difference and the second temperature difference is less than a threshold value, the second temperature difference information is provided to the control value calculator.
apparatus. 前記温度差保持部に対し、前記温度差情報を保存するタイミングを規定するタイミング情報を提供する演算装置を備え、
前記温度差保持部は、前記タイミング情報が規定するタイミングに従って前記温度差情報を保存することを特徴とする、請求項１に記載の装置。 The temperature difference holding unit is provided with an arithmetic device that provides timing information that defines the timing for storing the temperature difference information,
The apparatus according to claim 1, wherein the temperature difference holding unit stores the temperature difference information according to a timing defined by the timing information. 前記温度差情報選択部に対し、前記閾値を提供する演算装置を備え、
前記温度差情報選択部は、前記第１の温度差と前記第２の温度差との差が前記演算装置から受信した前記閾値以上であるか否か判断することを特徴とする、請求項１又は２に記載の装置。 For the temperature difference information selection unit, an arithmetic unit for providing the threshold value is provided,
The temperature difference information selection unit determines whether or not a difference between the first temperature difference and the second temperature difference is equal to or more than the threshold value received from the arithmetic device. Or the apparatus according to 2. 前記制御値算出部に対し、前記制御値を算出するための比例係数を提供する演算装置を備え、
前記制御値算出部は、前記第１の温度差又は前記第２の温度差と前記比例係数とを乗算することにより、前記制御値を算出することを特徴とする、請求項１〜３のいずれか１項に記載の装置。 The control value calculation unit is provided with an arithmetic device for providing a proportional coefficient for calculating the control value,
The control value calculation unit calculates the control value by multiplying the first temperature difference or the second temperature difference by the proportional coefficient. The apparatus according to item 1. 発熱体を冷却するファンが発生させる気流の上流側に配置された第１の温度センサが計測した温度と、前記気流の下流側に配置された第２の温度センサが計測した温度との温度差を算出し、前記温度差を示す温度差情報を生成するステップと、
第１の温度差情報の示す第１の温度差と、前記第１の温度差情報の生成前に生成された第２の温度差情報の示す第２の温度差との差が閾値以上であるか否か判断するステップと、
前記第１の温度差と前記第２の温度差との差が閾値以上である場合に、前記第１の温度差情報に基づき、前記ファンの回転数を制御するための制御値を算出するステップと、
前記第１の温度差と前記第２の温度差との差が閾値未満である場合に、前記第２の温度差情報に基づき、前記制御値を算出するステップと、
前記制御値を用いて前記ファンの回転数を制御するための制御信号を生成し、前記ファンに提供するステップと
を含む、ファン制御方法。 Temperature difference between the temperature measured by the first temperature sensor arranged upstream of the air flow generated by the fan for cooling the heating element and the temperature measured by the second temperature sensor arranged downstream of the air flow. And generating temperature difference information indicating the temperature difference,
The difference between the first temperature difference indicated by the first temperature difference information and the second temperature difference indicated by the second temperature difference information generated before the generation of the first temperature difference information is greater than or equal to a threshold value. Determining whether or not,
Calculating a control value for controlling the rotation speed of the fan based on the first temperature difference information when a difference between the first temperature difference and the second temperature difference is equal to or more than a threshold value. When,
Calculating a control value based on the second temperature difference information when a difference between the first temperature difference and the second temperature difference is less than a threshold value;
Generating a control signal for controlling the rotation speed of the fan using the control value and providing the control signal to the fan. 発熱体を冷却するファンが発生させる気流の上流側に配置された第１の温度センサが計測した温度と、前記気流の下流側に配置された第２の温度センサが計測した温度との温度差を算出し、前記温度差を示す温度差情報を生成するステップと、
第１の温度差情報の示す第１の温度差と、前記第１の温度差情報の生成前に生成された第２の温度差情報の示す第２の温度差との差が閾値以上であるか否か判断するステップと、
前記第１の温度差と前記第２の温度差との差が閾値以上である場合に、前記第１の温度差情報に基づき、前記ファンの回転数を制御するための制御値を算出するステップと、
前記第１の温度差と前記第２の温度差との差が閾値未満である場合に、前記第２の温度差情報に基づき、前記制御値を算出するステップと、
前記制御値を用いて前記ファンの回転数を制御するための制御信号を生成し、前記ファンに提供するステップと
を装置に実行させる、ファン制御プログラム。 Temperature difference between the temperature measured by the first temperature sensor arranged upstream of the air flow generated by the fan for cooling the heating element and the temperature measured by the second temperature sensor arranged downstream of the air flow. And generating temperature difference information indicating the temperature difference,
The difference between the first temperature difference indicated by the first temperature difference information and the second temperature difference indicated by the second temperature difference information generated before the generation of the first temperature difference information is greater than or equal to a threshold value. Determining whether or not,
Calculating a control value for controlling the rotation speed of the fan based on the first temperature difference information when a difference between the first temperature difference and the second temperature difference is equal to or more than a threshold value. When,
Calculating a control value based on the second temperature difference information when a difference between the first temperature difference and the second temperature difference is less than a threshold value;
Generating a control signal for controlling the rotation speed of the fan using the control value, and providing the control signal to the fan.
JP2019022651A 2019-02-12 2019-02-12 Apparatus, fan control method, and fan control program Pending JP2020129645A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115373443A (en) * 2022-08-26 2022-11-22 深圳市广通远驰科技有限公司 Temperature control method, temperature control device, electronic equipment and storage medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115373443A (en) * 2022-08-26 2022-11-22 深圳市广通远驰科技有限公司 Temperature control method, temperature control device, electronic equipment and storage medium
CN115373443B (en) * 2022-08-26 2024-04-05 深圳市广通远驰科技有限公司 Temperature control method, device, electronic equipment and storage medium

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