WO2013151117A1 - Système et procédé de commande de refroidissement à l'air et appareil de type modulaire qui utilise ces derniers - Google Patents

Système et procédé de commande de refroidissement à l'air et appareil de type modulaire qui utilise ces derniers Download PDF

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Publication number
WO2013151117A1
WO2013151117A1 PCT/JP2013/060278 JP2013060278W WO2013151117A1 WO 2013151117 A1 WO2013151117 A1 WO 2013151117A1 JP 2013060278 W JP2013060278 W JP 2013060278W WO 2013151117 A1 WO2013151117 A1 WO 2013151117A1
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Prior art keywords
module
cooling
temperature
air
control unit
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PCT/JP2013/060278
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English (en)
Japanese (ja)
Inventor
矢野　隆
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日本電気株式会社
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Publication of WO2013151117A1 publication Critical patent/WO2013151117A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20536—Modifications to facilitate cooling, ventilating, or heating for racks or cabinets of standardised dimensions, e.g. electronic racks for aircraft or telecommunication equipment
    • H05K7/207—Thermal management, e.g. cabinet temperature control

Definitions

  • the present invention relates to a modular device having a structure in which a module (also referred to as a unit or a card) is mounted and used as needed in a slot of a shelf (also referred to as a subrack or a device casing). More particularly, the present invention relates to an air cooling control system and method for a modular apparatus.
  • a module also referred to as a unit or a card
  • a shelf also referred to as a subrack or a device casing
  • modules are installed in the slots of the shelf as needed.
  • a plurality of cooling fans are attached to a shelf on which a module is mounted.
  • the direction in which air flows in the shelf is selected according to the mounting direction of the module.
  • a plurality of cooling fans are arranged in the shelf so that the inside of the shelf is uniformly blown.
  • the cooling fan is a component with a relatively short life, so it often needs to be replaced. For this reason, the cooling fan can be partially replaced so that the cooling air is not completely interrupted even if the cooling fan fails.
  • modules There are multiple types of modules depending on their capabilities and functions, and power consumption (ie, heat generation) varies depending on the type. Also, the number of modules mounted on the shelf varies depending on the usage status of the device. Furthermore, it is often operated with a slot open for future expansion or expansion.
  • a communication module is equipped with a spare module in preparation for a failure or a sudden line expansion, and such a module may be set in a power saving mode.
  • the power consumption (heat generation amount) of the modular device has a wide range
  • a control function that changes the capacity of the cooling fan as needed is important. If this is not done, the cooling fan will always operate at its maximum capacity (number of rotations) even in a shelf with only empty slots in extreme cases, and users will complain about wasting power and generating noise. Is easily expected.
  • Patent Document 1 discloses a noise reduction structure for a rack cabinet system, which is a technique for dealing with noise from a cooling fan. From the description of Patent Document 1, it can be seen that the noise of the cooling fan in a large-scale device is a serious problem.
  • Patent Documents 2 and 3 disclose techniques for automatically controlling a plurality of temperature sensors and a plurality of cooling fans in association with each other.
  • FIG. 5 is a configuration diagram showing an air cooling control system that automatically controls a plurality of temperature sensors and a plurality of fans in association with each other (hereinafter referred to as “related art air cooling control system”) and a modular apparatus using the air cooling control system.
  • related art air cooling control system an air cooling control system that automatically controls a plurality of temperature sensors and a plurality of fans in association with each other
  • the modular device 80 includes a plurality of modules 811 to 814, a plurality of temperature sensors 821 to 824, a plurality of cooling fans 831 to 836, a control unit 84, a PWM circuit 85, a shelf 86, a common line 87, a PWM dedicated line 88, and the like.
  • the air cooling control system 90 includes temperature sensors 821 to 824, cooling fans 831 to 836, a control unit 84, a PWM circuit 85, a common line 87, a PWM dedicated line 88, and the like.
  • the fan unit 91 includes cooling fans 831 to 836.
  • the air in the shelf 86 flows from bottom to top as indicated by wind flow 93.
  • Modules 811 to 814 are installed in slots in the shelf 86.
  • One temperature sensor 821 to 824 is provided for each of the modules 811 to 814, and the temperature of the modules 811 to 814 is most important.
  • the temperature information obtained by the temperature sensors 821 to 824 is output to the control unit 84 via the common line 87.
  • the PWM circuit 85 can individually PWM control the cooling fans 831 to 836.
  • the control unit 84 grasps the mounting information indicating which type of modules 811 to 814 are mounted (or not mounted) in which slot, artificially or automatically. Then, the control unit 84 determines increase / decrease in the number of rotations of the cooling fans 831 to 836 at the respective positions from the mounting information and the temperature information sent from the temperature sensors 821 to 824 attached to the modules 811 to 814. The rotation speed of the cooling fans 831 to 836 is changed through the PWM circuit 85.
  • a plurality of temperature sensors 821 to 824 and a plurality of cooling fans 831 to 836 are provided. Development needed to incorporate relationships into complex control algorithms.
  • a mechanism (wiring, etc.) for acquiring information from the plurality of temperature sensors 821 to 824 and a high-performance control unit 84 that issues instructions to the plurality of cooling fans 831 to 836 based on the plurality of real-time information are required.
  • a PWM circuit 85 for controlling the rotational speed of the cooling fans 831 to 836 is also necessary in many cases.
  • an object of the present invention is to provide an air cooling control system for a modular type apparatus that can simplify the development work and the configuration without impairing the control function for the cooling fan.
  • the air cooling control system is: An air cooling control system for cooling a modular device capable of mounting a plurality of modules, comprising a temperature sensor, a control unit and a cooling fan,
  • the temperature sensor measures the temperature of the air flowing through the periphery of the module;
  • the control unit inputs data related to the steady heat generation amount of the module from the module, and outputs a control signal corresponding to the heat generation amount,
  • the cooling fan generates an air flow around the module and controls the number of rotations of the cooling fan by itself based on a control signal output from the control unit and a temperature measured by the temperature sensor. Is.
  • An air cooling control method includes: An air cooling control method for cooling a modular device capable of mounting a plurality of modules, A cooling fan for generating an air flow around the module; Controlling the number of revolutions of the cooling fan based on the steady heat generation amount of the module and the temperature of the air flowing around the module; Is.
  • the modular device comprises: A modular device comprising a plurality of modules, a temperature sensor, a controller and a cooling fan,
  • the temperature sensor measures the temperature of the air flowing through the periphery of the module;
  • the control unit inputs data related to a steady heat generation amount from the module from the module, and outputs a control signal corresponding to the heat generation amount,
  • the cooling fan generates an air flow around the module and controls the number of rotations of the cooling fan by itself based on a control signal output from the control unit and a temperature measured by the temperature sensor. Is.
  • the controller since the relationship between the plurality of temperature sensors and the plurality of cooling fans is not incorporated into a complicated control algorithm, the control function for the cooling fans is not impaired, so that the development work can be simplified.
  • the controller does not need a mechanism (wiring or the like) for acquiring information from a plurality of temperature sensors, and does not need to give instructions to a plurality of cooling fans based on a plurality of real-time information. Therefore, the configuration of the control unit and its periphery can be simplified.
  • Embodiment 1 of the air-cooling control system and modular apparatus which concern on this invention. It is a block diagram which shows the specific example 1 of the air cooling control system in FIG. It is a block diagram which shows the specific example 2 of the air cooling control system in FIG. 4 is a chart showing characteristics of a fan main body in FIG. 3. It is a block diagram which shows the related art air-cooling control system and a modular apparatus.
  • the air cooling control method according to the present invention captures the operation of the air cooling control system according to the present invention as a method invention. Therefore, the embodiment of the air cooling control method according to the present invention will be described simultaneously in the embodiment of the air cooling control system according to the present invention.
  • FIG. 1 is a configuration diagram showing Embodiment 1 of an air cooling control system and a modular apparatus according to the present invention. Hereinafter, description will be given based on this drawing.
  • the modular apparatus 10 includes a plurality of modules 111 to 114, a plurality of temperature sensors 121 to 123, a plurality of cooling fans 131 to 136, a control unit 14, a shelf 16, a common line 17, an analog control signal line 18, and the like.
  • the air cooling control system 20 includes temperature sensors 121 to 123, cooling fans 131 to 136, a control unit 14, a common line 17, an analog control signal line 18, and the like.
  • the fan unit 21 includes cooling fans 131 to 136.
  • the air in the shelf 16 flows from bottom to top as indicated by the wind flow 23.
  • the modules 111 to 114 are installed in slots in the shelf 16.
  • the air cooling control system 20 cools the modular apparatus 10 to which a plurality of modules 111 to 114 can be mounted.
  • the fan unit 21 is divided into three units in the horizontal direction, and each unit includes temperature sensors 121 to 123, respectively.
  • the cooling fans 131 to 136 belonging to each unit can be optimized independently for each unit. Therefore, for example, the slot of the shelf 16 is divided into three sections of the left side, the center, and the right side, and the information of the modules 111 to 114 mounted in each section is used for each unit of the fan unit 21 that generates wind in each section. To be communicated to.
  • the temperature sensors 121 to 123 measure the temperature of the air flowing around the modules 111 to 114, that is, the air flowing in the vicinity of the cooling fans 131 to 136.
  • the control unit 14 inputs data regarding the steady heat generation amount of the modules 111 to 114 from the modules 111 to 114, and outputs a control signal Va corresponding to the heat generation amount.
  • the cooling fans 131 to 136 generate an air flow around the modules 111 to 114 and are provided on the downstream side of the air.
  • the cooling fans 131 to 136 are measured by the control signal Va output from the control unit 14 and the temperature sensors 121 to 123.
  • the number of rotations of the cooling fans 131 to 136 is controlled by itself based on the temperature.
  • the measured values of the temperature sensors 821 to 824 installed directly on the modules 811 to 814 and the surroundings of the modules 111 to 114 in this embodiment. It was found that there was a strong correlation with the measured values of the temperature sensors 121 to 123 installed on the downstream side of the air. Therefore, according to the temperature sensors 121 to 123 in the present embodiment, the rotation speed instructions similar to those in the case of comprehensively considering the measurement values greatly different for the temperature sensors 821 to 824 in the related art are given to the cooling fans 131 to 136. Can do.
  • control unit 14 in the present embodiment inputs data relating to the steady heat generation amount of the modules 111 to 114 from the modules 111 to 114, and outputs a control signal Va corresponding to the heat generation amount to the cooling fans 131 to 136. .
  • the cooling fans 131 to 136 can obtain information on the steady heat generation amount of the modules 111 to 114 in addition to the temperatures measured by the temperature sensors 121 to 123, so that the rotational speed with higher accuracy can be obtained based on these information. Control becomes possible.
  • each module 111-114 transmits its own heat generation amount to the control unit 14 also when the operation mode of each module 111-114 is switched from the normal mode to the low power consumption mode or vice versa.
  • the control unit 14 does not need a mechanism (wiring or the like) for acquiring information from the plurality of temperature sensors 121 to 124, and does not need to issue instructions to the plurality of cooling fans 131 to 136 based on the plurality of real-time information. . Therefore, the configuration of the control unit 14 and its surroundings can be simplified.
  • the temperature of each part is read out in real time from the plurality of modules 111 to 114, and a complicated control algorithm such as PWM control of the plurality of cooling fans 131 to 136 based on the temperature is mounted. Even without using a simple control circuit, it is possible to adjust the fan capacity close to the optimum according to the mounting state of the modules 111 to 114.
  • control unit 14 When the control unit 14 detects that the control unit 14 has failed, the control unit 14 may output a control signal Vb corresponding to the maximum rotational speed instead of the control signal Va. In this case, even if the control unit 14 breaks down, it is possible to achieve fail safe that operates in a safer direction.
  • FIG. 2 is a block diagram showing a specific example 1 of the air cooling control system in FIG.
  • FIG. 2 is a block diagram showing a specific example 1 of the air cooling control system in FIG.
  • a description will be given based on FIG. 1 and FIG.
  • the control unit 14 includes a microcomputer, a D / A converter, and the like.
  • the microcomputer may be a general computer including a CPU, a memory, an input / output interface, and the like.
  • the temperature sensor 121a of this example includes a series circuit of an NTC (NegativeegTemperature Coefficient) thermistor 31 and a resistor 32, and outputs a voltage at a connection point between the NTC thermistor 31 and the resistor 32 as a first analog voltage signal V1. .
  • NTC NearegativeegTemperature Coefficient
  • the cooling fan 131a in this example includes an analog adder 33, a DC motor 34, an impeller 35, and the like.
  • the analog adder 33 is a general one having an adder circuit including an operational amplifier and a resistor, a voltage follower, and the like, and controls the rotation speed of the DC motor 34 with an applied voltage.
  • the DC motor 34 has a property that the number of rotations increases or decreases in proportion to the applied voltage.
  • the impeller 35 is attached to the rotating shaft of the DC motor 34.
  • the cooling fan 131a receives a first analog voltage signal V1 corresponding to a temperature measurement value by the temperature sensor 121a from the temperature sensor 121, and inputs a second analog voltage signal V2 corresponding to the control signal Va from the control unit 14. Based on the added value V1 + V2 of the first analog voltage signal V1 and the second analog voltage signal V2, the number of rotations of the first analog voltage signal V1 and the second analog voltage signal V2 is controlled.
  • the cooling fan 131a increases the number of revolutions as the temperature measured by the temperature sensor 121a is higher or the steady heat generation amount of the modules 111 to 114 is increased, and the temperature measured by the temperature sensor 121a is higher and the modules 111 to 114 are higher. If there is a large amount of steady heat generation, the number of revolutions is further increased.
  • the configuration can be further simplified.
  • FIG. 3 is a block diagram showing a specific example 2 of the air cooling control system in FIG.
  • FIG. 4 is a chart showing the characteristics of the fan main body in FIG.
  • the control unit 14 is the same as in the first specific example.
  • the cooling fan 131b includes a fan main body 41, a voltage variable resistor 42, and the like.
  • the temperature sensor 121b is a thermistor.
  • the fan body 41 uses a commercially available temperature variable speed fan (see Non-Patent Document 1).
  • the fan main body 41 has a + terminal 41a, a ⁇ terminal 41b, and a control terminal 41c, and a series circuit of a voltage variable resistor 42 and a temperature sensor 121b is connected between the ⁇ terminal 41b and the control terminal 41c.
  • the voltage variable resistor 42 is also called a voltage-controlled resistor, which can be realized in a linear region of, for example, a bipolar transistor or a field effect transistor, and changes its resistance value Rs according to an applied control signal Va.
  • FIG. 4A is a graph showing an example of the relationship between the thermistor temperature, that is, the measured temperature (° C.) of the temperature sensor 121b, and the rate of change in rotation rate (%).
  • the thermistor temperature exceeds the temperature threshold TL
  • the low speed rotation 50%) shifts to variable speed rotation
  • the thermistor temperature exceeds the temperature threshold TH
  • the variable speed rotation shifts to high speed rotation (100%).
  • FIG. 4B is a table showing an example of the relationship between the resistance value Rs of the voltage variable resistor 42 and the temperature threshold values TL and TH.
  • the cooling fan 131b controls the rotational speed by lowering the temperature thresholds TL and TH, so that the cooling capacity is increased. In other words, the cooling fan 131b decreases the temperature threshold TL at which the rotation speed starts to increase and the temperature threshold TH at which the rotation starts at a high speed, as the amount of heat generated by the control signal Va increases.
  • the configuration can be further simplified.
  • the number of rotations of each cooling fan 131 to 136 is controlled by taking into account the mounting state of the modules 111 to 114 to the actual measured values of the temperature by the temperature sensors 121 to 123 installed in the vicinity of the cooling fans 131 to 136. Real-time temperature information in the modules 111 to 114 is not used for control.
  • Temperature sensors 121 to 123 are installed downstream of the air that has passed through the modules 111 to 114 that are heating elements.
  • the temperature sensors 121 to 123 may be incorporated in the fan unit 21.
  • the modular device 10 has a control unit 14 for communication between each module 111 to 114 and the outside of the device, state monitoring, and the like.
  • the control unit 14 holds information on the types and states (setting information such as the power saving mode) of the modules 111 to 114 installed in each slot in the form of module registration information. This information is basically set by a human and does not require monitoring at any time like temperature.
  • a mechanism is also used in which a module is automatically registered when the module is inserted into the slot, but it is the same if the module registration work performed by a human is automated.
  • the control unit 14 transmits a control signal Va corresponding to the mounting state of the modules 111 to 114 to the cooling fans 131 to 136.
  • This control signal Va is not information having real-time characteristics such as temperature information inside the modules 111 to 114. That is, the control unit 14 simply obtains information corresponding to the amount of generated heat from only the type and operation mode (whether the power saving mode is set) of the modules 111 to 114 mounted in the vicinity of the cooling fans 131 to 136.
  • the estimation and the information are converted into a simple signal format, for example, an analog voltage signal, and transmitted to the cooling fans 131 to 136 as a control signal Va.
  • Each of the cooling fans 131 to 136 simply adds the analog voltage signal from the control unit 14 to the analog voltage signal obtained from the temperature sensors 121 to 123, for example, and maintains the rotation speed based on the analog voltage signal.
  • a specific example of the operation will be described below.
  • the control unit 14 transmits to the cooling fans 131 to 136 a control signal Va that lowers the temperature threshold value at which high-speed rotation starts.
  • Va the temperature threshold value at which high-speed rotation starts.
  • the control unit 14 transmits a control signal Va for increasing the temperature threshold value to the cooling fans 131 to 136.
  • Va the control signal Va for increasing the temperature threshold value to the cooling fans 131 to 136.
  • the original information for generating the control signal Va is information originally stored as module registration information in the control unit 14. Therefore, it is not necessary to add a new mechanism for extracting information from the modules 111 to 114.
  • a monitoring circuit such as a watchdog timer built in the CPU issues a control signal that maximizes the number of rotations of the cooling fan.
  • a mechanism for not receiving (clipping) an out-of-range voltage at the entrance of the cooling fan that receives the control signal from the control unit is provided.
  • a circuit that maximizes the cooling fan speed should be used. The failure of the cooling fan itself is detected by a rotation sensor built in the cooling fan.
  • the present invention has been described with reference to each of the above embodiments, but the present invention is not limited to each of the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention. Further, the present invention includes a combination of some or all of the configurations of the above-described embodiments as appropriate.
  • An air-cooling control system for cooling a modular device in which a plurality of modules can be mounted comprising a temperature sensor, a control unit, and a cooling fan
  • the temperature sensor measures the temperature of the air flowing through the periphery of the module
  • the control unit inputs data related to the steady heat generation amount of the module from the module, and outputs a control signal corresponding to the heat generation amount
  • the cooling fan generates an air flow around the module and controls the number of rotations of the cooling fan by itself based on a control signal output from the control unit and a temperature measured by the temperature sensor.
  • Air cooling control system Air cooling control system.
  • the cooling fan inputs a first analog voltage signal corresponding to the measured value of the temperature from the temperature sensor, inputs a second analog voltage signal corresponding to the control signal from the control unit, and Controlling the number of revolutions based on an added value of the first analog voltage signal and the second analog voltage signal;
  • the air cooling control system according to appendix 1.
  • the cooling fan lowers a temperature threshold value at which the cooling fan begins to rotate at a higher speed as the heat generation amount indicated by the control signal increases.
  • the air cooling control system according to appendix 1 or 2.
  • control unit When the control unit detects that the control unit has failed, the control unit outputs a control signal corresponding to the maximum rotational speed instead of the control signal.
  • the air-cooling control system according to appendix 1, 2, or 3.
  • a modular apparatus including a plurality of modules, a temperature sensor, a control unit, and a cooling fan
  • the temperature sensor measures the temperature of the air flowing through the periphery of the module
  • the control unit inputs data related to the steady heat generation amount of the module from the module, and outputs a control signal corresponding to the heat generation amount
  • the cooling fan generates an air flow around the module and controls the number of rotations of the cooling fan by itself based on a control signal output from the control unit and a temperature measured by the temperature sensor.
  • the cooling fan receives a first analog voltage signal corresponding to the measured value of the temperature from the temperature sensor, inputs a second analog voltage signal corresponding to the control signal from the control unit, and Controlling the number of revolutions based on an added value of the first analog voltage signal and the second analog voltage signal;
  • the modular apparatus according to appendix 9.
  • the cooling fan lowers a temperature threshold value at which the cooling fan starts to rotate at a higher speed as the heating value indicated by the control signal increases.
  • the modular apparatus according to appendix 9 or 10.
  • control unit When the control unit detects that the control unit has failed, the control unit outputs a control signal corresponding to the maximum rotational speed instead of the control signal.
  • An air cooling control system for cooling a modular apparatus in which a plurality of modules can be mounted comprising a temperature sensor, a control unit, and a cooling fan
  • the temperature sensor measures the temperature of air flowing in the vicinity of the cooling fan
  • the control unit stores in advance a steady heat generation amount of the module, and outputs a control signal corresponding to the heat generation amount
  • the cooling fan generates an air flow around the module and is provided on the downstream side of the air.
  • the cooling fan is based on a control signal output from the control unit and a temperature measured by the temperature sensor. Self-controlling the rotation speed of Air cooling control system.
  • the present invention can be used for a device having a cabinet structure or a subrack structure, and typically, a communication device or a computer device.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

Le problème à résoudre dans le cadre de la présente invention consiste à proposer un système de commande de refroidissement à l'air, ou analogue, pour un appareil de type modulaire, le travail de développement de ce système pouvant être simplifié et la construction de ce système pouvant être simplifiée. La solution proposée consiste en des capteurs de température (121 à 123) qui mesurent les températures de l'air qui entre à la périphérie des modules (111 à 114). Une unité de commande (14) reçoit, comme entrée, en provenance des modules (111 à 114) des données qui se rapportent à la quantité de chaleur qui doit être générée par les modules (111 à 114) en régime permanent et transmet un signal de commande (Va) qui correspond à la quantité de chaleur générée. Des ventilateurs de refroidissement (131 à 136) génèrent des flux d'air autour de la périphérie des modules (111 à 114) et commandent eux-mêmes leurs vitesses de rotation sur la base du signal de commande (Va) transmis par l'unité de commande (14) et des températures mesurées par les capteurs de température (121 à 123).
PCT/JP2013/060278 2012-04-05 2013-04-04 Système et procédé de commande de refroidissement à l'air et appareil de type modulaire qui utilise ces derniers WO2013151117A1 (fr)

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JP2015088672A (ja) * 2013-10-31 2015-05-07 富士通株式会社 冷却装置および冷却方法
CN105578835A (zh) * 2014-10-14 2016-05-11 鸿富锦精密工业（深圳）有限公司 货柜数据中心
JP2016207782A (ja) * 2015-04-20 2016-12-08 富士通株式会社 電子装置及びその冷却方法
JP2017084582A (ja) * 2015-10-27 2017-05-18 株式会社デンソー 電池パック
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CN107333457A (zh) * 2017-09-06 2017-11-07 合肥宗平计算机科技有限公司 通讯机柜散热装置
CN108650859A (zh) * 2018-06-29 2018-10-12 中国联合网络通信集团有限公司 一种机柜的降温装置和降温方法

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JP2015088672A (ja) * 2013-10-31 2015-05-07 富士通株式会社 冷却装置および冷却方法
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CN106714512A (zh) * 2016-12-05 2017-05-24 四川行之知识产权运营服务有限公司 一种对电气柜安全温控的方法
CN107333457A (zh) * 2017-09-06 2017-11-07 合肥宗平计算机科技有限公司 通讯机柜散热装置
CN108650859A (zh) * 2018-06-29 2018-10-12 中国联合网络通信集团有限公司 一种机柜的降温装置和降温方法

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