WO2004080142A1 - 冷却装置 - Google Patents
冷却装置 Download PDFInfo
- Publication number
- WO2004080142A1 WO2004080142A1 PCT/JP2004/002376 JP2004002376W WO2004080142A1 WO 2004080142 A1 WO2004080142 A1 WO 2004080142A1 JP 2004002376 W JP2004002376 W JP 2004002376W WO 2004080142 A1 WO2004080142 A1 WO 2004080142A1
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- WO
- WIPO (PCT)
- Prior art keywords
- temperature
- cooling fan
- detection unit
- predetermined
- unit
- Prior art date
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Classifications
-
- 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
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20209—Thermal management, e.g. fan control
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1902—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value
- G05D23/1905—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value associated with tele control
Definitions
- the present invention relates to a cooling device provided in a wireless base station device (BTS) that can be installed outdoors for performing wireless communication with a mobile station.
- BTS wireless base station device
- a wireless base station device that can be installed outdoors may be equipped with a cooling fan because the temperature inside the housing may rise beyond the normal operating range of the circuit due to heat generated from the circuit provided inside.
- Cooling fans are indispensable, especially for small devices because heat is likely to accumulate in the housing.
- FIG. 4 is a block diagram showing a conventional radio base station apparatus.
- the conventional wireless base station device includes an antenna 1, a wireless unit 3, a temperature sensor 5, a cooling fan 7, a fan driving unit 9, and a control unit 11. It is configured.
- the wireless section 3 transmits and receives signals via the antenna 1. Further, the temperature sensor 5 detects the temperature inside the housing of the wireless base station device. Further, the cooling fan 7 takes in external air into the housing through a dustproof filter (not shown) to cool the inside. Further, the fan driving section 9 instructs to turn on / off a power supply (not shown) or to drive or stop the cooling fan 7 in accordance with control by the control section 11. Note that, when the power of the wireless base station apparatus is turned on, the fan driving unit 9 is set to drive the cooling fan 7 if the control unit 11 does not control the fan.
- the control unit 11 controls the cooling fan 7 on and off by a program based on the temperature detected by the temperature sensor 5, and controls the temperature inside the housing to be equal to or higher than a predetermined temperature at which circuit operation is hindered. I try not to be. Note that the control unit 11 And an internal memory (not shown), and a program for turning on / off the cooling fan 7 is stored in the internal memory. The control unit 11 reads out the program from the internal memory and performs on / off control of the cooling fan 7.
- the control unit 11 has a CPU and an internal memory as described above, but the operation guarantee temperature of these ICs is often 0 ° C. or higher in many cases.
- the fan driving unit 9 is configured by a portion that can guarantee the operation at a temperature of 140 ° C. or higher.
- the cooling fan 7 is driven by the instruction. For this reason, even when the wireless base station device is installed in an extremely cold environment of, for example, 130 ° C. and the power is turned on, the cooling fan 7 is driven, but the operation assurance temperature of the control unit 11 is lower. For example, when the temperature is 0 ° C. or higher, there is a high possibility that the control unit 11 does not operate normally or at all. If the control unit 11 does not operate normally, the cooling fan 7 is not controlled to be turned off, so that extremely low temperature outside air is continuously sucked into the housing.
- the cooling fan draws outside air into the housing through the dustproof filter to cool the inside.However, if the dustproof filter becomes clogged, the cooling fan is driven even if the cooling fan is driven. If the temperature inside the body does not drop, and if left as it is, the temperature inside the case will exceed the normal operating range of the internal circuit, the dust filter must be replaced. Therefore, it is necessary to detect the clogging of the dustproof filter.For example, after driving the cooling fan, the temperature difference between the inside of the device and the outside of the device is detected. There is a technique of performing an abnormality notification process in advance (for example, see Japanese Patent Application Laid-Open No. 2002-3577317 (pages 4-5, FIG. 1)).
- the detection accuracy of the temperature difference between the inside and outside of the device becomes unstable depending on the wind speed outside the device.In some cases, even if the dust filter is not clogged, the detected temperature difference may exceed the normal temperature difference range. However, there is a risk of performing the abnormality notification processing. Also, in the cold winter season, even if the dust filter is clogged and the cooling capacity of the cooling fan is reduced, the temperature inside the housing does not rise so much, although the relative temperature to the outside air temperature rises. Therefore, in this case, it is not necessary to substantially replace the dustproof filter.
- the detected temperature difference may exceed the normal temperature difference range and the abnormality notification processing may be performed. obtain.
- the abnormality notification processing is performed at a timing when it is not necessary to replace the dustproof filter.
- the number of times the dustproof filter is replaced increases and a burden is imposed on maintenance personnel.
- replacing the dust filter of the device requires a great deal of labor. Therefore, it is desirable that the number of replacements of the dust filter is small.
- An object of the present invention is to provide a cooling device that operates without hindering a rise in temperature inside a housing even when power is turned on in an extremely cold environment.
- a cooling device includes: a cooling fan that takes in outside air into a housing; a temperature detection unit that detects a temperature in the housing; and an on / off control of the cooling fan based on the temperature detected by the temperature detection unit.
- a first control unit that turns off the cooling fan when a temperature detected by the temperature detection unit is lower than a predetermined temperature equal to or lower than a lower limit value of an operation guarantee temperature of the first control unit.
- a second control unit for performing control for this reason, the second control unit controls the cooling fan to be turned off even if it does not operate because the temperature inside the housing is lower than the operation guarantee temperature of the first control unit.
- the cooling fan that has been started to drive by turning on the power is turned on. Even if Ann is not turned off by the first control unit, it is turned off by the second control unit. In this case, since the extremely low temperature outside air is not sucked into the housing, the temperature inside the housing rises due to the heat generated in the internal circuit. In other words, even when the power is turned on in an extremely cold environment, it operates without hindering the temperature rise inside the housing.
- the first control unit operates by software
- the second control unit operates by hardware.
- the operation of CPU peripheral circuits such as CPU and memory is premised.
- the control of stopping the fin drive unit based on the temperature data can be designed with a PLD (Programmable Logic Device) or the like.By selecting a PLD with a wide operation guarantee range, the operation guarantee temperature can be controlled. A wide range of hardware can be designed. Therefore, the range of the operation assurance temperature of the second control unit is wider than that of the first control unit. Therefore, even if the first control unit does not operate due to the extremely low temperature, the second control unit can operate.
- PLD Programmable Logic Device
- the cooling device instructs to drive the cooling fan when the power is turned on, and controls the cooling fan in accordance with the control by the first control unit or the second control unit. It is desirable to have a terminal drive unit for instructing driving or stopping.
- the cooling device may further include a cooling fan state detection unit that detects whether the cooling fan is operating normally, a temperature detected by the temperature detection unit, and the cooling fan state detection unit.
- a filter clogging detection unit that detects clogging of the dust-proof filter based on the operating state of the cooling fan detected by the cooling fan.
- the filter clogging detection unit includes a cooling fan state detection unit. The state of the cooling fan detected by the temperature detection unit is normal operation, and the temperature detected by the temperature detection unit is equal to or higher than a first predetermined temperature and is equal to or higher than the first predetermined temperature even after a predetermined time has elapsed. If there is, it is determined that the dust filter is clogged.
- the cooling fan state unit detects an operation state of the cooling filter by detecting a rotation speed of the cooling fan
- the filter clogging detection unit includes a cooling fan state.
- the number of rotations of the cooling fan detected by the detection unit is equal to or more than a predetermined number
- the temperature detected by the temperature detection unit is equal to or more than a first predetermined temperature
- the first predetermined temperature is maintained even after a predetermined time has elapsed. In this case, it is desirable to determine that the dust filter has been clogged.
- the cooling device further includes a signal transmission unit that transmits a predetermined signal to a predetermined destination via a communication network, wherein the filter clogging detection unit detects that the dust filter is clogged. And instructing the signal transmission unit to transmit a first predetermined signal to the predetermined destination.
- the filter clogging detection unit will not detect it.
- the first predetermined signal is not sent to the user. As a result, the labor for replacing the filter can be reduced, and the burden on maintenance personnel can be reduced.
- the filter clogging detection unit is configured such that, when the temperature detected by the temperature detection unit reaches a second predetermined temperature higher than the first predetermined temperature, It is desirable to instruct the signal transmission unit to transmit a second predetermined signal to a destination.
- a communication device includes the above-described cooling device and communication unit, and the cooling device, when the temperature detected by the temperature detection unit reaches the second predetermined temperature, Power supply to the power supply is stopped.
- the communication unit often has components that generate a large amount of heat, such as an amplifier. By stopping the function of the communication unit that generates a large amount of heat, the temperature inside the housing can be suppressed from rising. As a result, the temperature in the housing does not become extremely high even if the dust filter is not replaced for a long time.
- the present invention provides a communication device including the above-described cooling device. Therefore, compared to the case where the cooling fan is driven, the communication device can normally operate in a short time after turning on the power.
- FIG. 1 is a block diagram illustrating a wireless base station device according to an embodiment of the present invention.
- FIG. 2 is a block diagram illustrating a wireless base station device according to an embodiment of the present invention and a system including the wireless base station device. ,
- FIG. 3 is a block diagram showing an internal configuration of a control unit included in the wireless base station device according to one embodiment of the present invention
- FIG. 4 is a block diagram showing a conventional radio base station apparatus.
- 101 is an antenna
- 103 is a wireless unit
- 105 is a temperature sensor
- 107 is a cooling fan
- 109 is a fan driving unit
- 111 is a control unit
- 1 13 is an acquisition control unit
- 210 is a wireless base station device
- 202 is a communication network
- 203 is a base station remote control center
- 211 is a wireless unit
- 212 is a baseband signal processing unit.
- 2 13 is a control section
- 2 14 is a maintenance monitoring control section
- 2 15 is a dustproof filter
- 2 16 is a cooling fan
- 2 17 is an antenna
- 2 18 is a temperature sensor
- 2 19 is a rotation.
- the number detection unit, 220 is a power supply unit
- 231 is a station control unit
- 232 is a cooling fan control unit
- 233 is a filter clogging detection unit.
- a wireless base station device provided with a cooling device according to the present invention and which can be installed outdoors will be described as an example.
- the wireless base station device according to the present embodiment is an example of a communication device. . (First Embodiment)
- FIG. 1 is a block diagram showing a wireless base station device according to the first embodiment of the present invention.
- the wireless base station apparatus includes an antenna 101, a radio section 103, a temperature sensor 105 as an example of a temperature detecting section, and a cooling fan 107.
- a fan drive unit 109 as an example of a fan drive unit, a control unit 111 as an example of a first control unit, and an auxiliary control unit 113 as an example of a second control unit. It is configured as such.
- the wireless unit 103 transmits and receives signals via the antenna 101. Further, the temperature sensor 105 detects the temperature inside the housing of the wireless base station device.
- the cooling fan 107 takes in external air into the housing via a dustproof filter (not shown) to cool the inside.
- the fan drive unit 109 instructs to turn on or off the power supply (not shown) or to drive or stop the cooling fan 107 according to the control of the control unit 111 or the capture control unit 113. Note that the fan driving unit 109 is set to drive the cooling fan 107 when the wireless base station device is powered on.
- control unit 111 controls on / off of the cooling fan 107 by a program based on the temperature detected by the temperature sensor 105, and the temperature in the housing may interfere with the circuit operation. So that the temperature does not exceed the predetermined temperature.
- the control unit 111 has an internal memory (not shown), and a program for controlling the cooling fan 107 to be turned on and off is stored in the internal memory. The control unit 111 reads out the program from the internal memory and performs on / off control of the cooling fan 107.
- the control unit 111 controls the cooling fan 107 on and off normally outside the operation guarantee temperature range. May not be done.
- the operation guarantee temperature of the control unit 111 is 0. If the temperature inside the case is 130 ° C, the on / off control of the cooling fan 107 is likely not to be performed normally if the temperature is between C and 70 ° C.
- the assist control unit 113 controls the cooling fan 107 to be turned off by hardware such as a logic circuit based on the temperature detected by the temperature sensor 105. There is a wider range of guaranteed operating temperatures for those that operate with hardware than those that operate with software.
- control to stop the fan drive unit based on temperature data can be designed with a PLD (Programmable Logic Device) or the like, and by selecting a PLD with a wide operation guarantee range, hardware with a wide operation guarantee temperature can be selected.
- PLD Programmable Logic Device
- the operation guarantee temperature of the control unit 111 is 0 ° C to 70 ° C
- the operation guarantee temperature of the auxiliary control unit 113 is ⁇ 40 ° C to 100 ° C.
- the operation control temperature range of the capture control unit 113 is wider than that of the control unit 111.
- the assisting control unit 113 determines that the temperature detected by the temperature sensor 105 is equal to or lower than the lower limit value (for example, 0 ° C) of the operation assurance temperature of the control unit 111. For example, when the temperature is lower than 15 ° C), the cooling fan 107 is turned off. Therefore, even when the temperature detected by the temperature sensor 105 is extremely low, for example, 130 ° C., the auxiliary control unit 113 operates to turn off the cooling fan 107.
- the lower limit value for example, 0 ° C
- the cooling fan 107 When the wireless base station device is installed in a normal temperature environment of, for example, 18 ° C. and is turned on, the cooling fan 107 is driven by an instruction from the fan driving unit 109. Further, when the wireless base station device is installed in a low-temperature environment such as 2 ° C. and is turned on, the cooling fan 107 starts driving according to an instruction from the fan driving unit 109. However, in this case, the temperature detected by the temperature sensor 105 (the temperature inside the casing) is also about 2 ° C., so that the control unit 111 controls the cooling fan 107 to be turned off. After the cooling fan 107 is turned off by the control unit 111, the temperature inside the housing increases due to heat generated by other components such as the wireless unit 103. When the temperature detected by the temperature sensor 105 reaches the set temperature, the cooling fan 107 is turned on.
- the cooling fan 107 starts driving according to an instruction from the fan driving unit 109.
- the control unit 111 since the temperature detected by the temperature sensor 105 (the temperature inside the housing) is about 130 ° C., the control unit 111 does not operate. In this case, the cooling fan is controlled by the auxiliary control unit 113. 107 is turned off. After the cooling fan 107 is turned off by the assisting control unit 113, the temperature inside the housing increases due to heat generated by other components such as the wireless unit 103. However, the wireless base station device operates with the specified performance.
- the control unit 111 controls the cooling fan 107 to turn on as described above.
- the cooling fan 1010 is instructed by the fan driving unit 109. 7 starts driving, but the control unit 111, which does not operate the control unit 111, operates even at an extremely low temperature. In this case, since extremely low-temperature outside air is not sucked into the housing, the temperature inside the housing rises due to heat generated by other components such as the wireless unit 103.
- the wireless base station device operates with the specified performance in a short time after the power is turned on.
- the wireless base station device is installed and turned on in an extremely cold environment, it is possible to provide a wireless base station device that normally operates in a short time after the power is turned on.
- the wireless base station device has been described as an example.
- the cooling device according to the present invention may be provided in another device such as a remote monitoring camera.
- the cooling fan can be operated by the second control portion. To control off. Therefore, when installed in an extremely cold environment and turned on, the second control unit turns off the cooling fan, which is started by turning on the power, even if the cooling fan is not turned off by the first control unit. Is done. In this case, since the extremely low-temperature outside air is not sucked into the housing, the temperature inside the housing rises due to the heat generated in the internal circuit. In other words, even when the power is turned on in an extremely cold environment, the rise in temperature inside the enclosure is prevented. Works without.
- FIG. 2 is a block diagram showing a wireless base station device according to a second embodiment of the present invention and a system including the wireless base station device.
- the radio base station apparatus 201 of the present embodiment includes a radio section 211 and a baseband signal processing section 212 as an example of a communication section, and a filter clogging detection section as an example.
- those components are collectively referred to as an internal circuit of the radio base station apparatus 201.
- the wireless base station apparatus 201 is connected to a base station remote control center 203 via a communication network 202.
- the radio unit 211 demodulates a radio signal received by the antenna 217 or modulates a baseband signal and transmits the modulated signal from the antenna 217. Further, the baseband signal processing section 212 performs a predetermined process on the baseband signal.
- the cooling fan 2 16 rotates the fan with a motor and takes in outside air into the housing of the wireless base station device 201 via the dustproof filter 2 15. Further, the dustproof filter 2 15 removes dust and dirt from the outside air sucked by the cooling fan 2 16.
- the temperature sensor 218 detects the temperature inside the housing of the wireless base station device 201 (hereinafter, also referred to as “internal temperature”).
- the rotation number detecting section 2 19 detects the rotation number of the motor that rotates the cooling fan 2 16.
- the power supply section 220 has a DC / DC converter and the like, and supplies necessary power to each component of the wireless base station apparatus 201.
- the control unit 2 13 controls the baseband signal processing unit 2 12, controls the cooling fan 2 16 on / off, detects the dust filter 2 15 clogging, and detects the temperature sensor 2 2 The temperature detected at 18 is monitored. In addition, when the clogging of the dustproof filter 215 is detected, maintenance and monitoring is performed so as to send a signal (an example of a first predetermined signal) urging filter replacement to the base station remote control center 203 via the communication network 202. Instruct the control unit 214.
- the control unit 2 13 turns on the communication network 202. It instructs the maintenance monitoring control section 214 to output an alarm signal (an example of the second predetermined signal) to the base station remote control center 203 via the base station. Then, when instructing to output the alarm signal, the power supply unit 220 is controlled so as to stop supplying power to the radio unit 211 and the baseband signal processing unit 212.
- the maintenance monitoring control unit 214 is connected to the base station remote control center 203 via the communication network 202, and transmits and receives the maintenance monitoring control signal to and from the base station remote control center 203. Thus, the operation management processing and the state monitoring control of the wireless base station apparatus 201 are performed. From the maintenance management control unit 214, a signal prompting replacement of the dustproof filter 215, an alarm signal, and the like are sent to the base station remote control center 203.
- FIG. 3 is a block diagram showing the internal configuration of the above-described control unit 21.
- the control unit 2 13 includes a station control unit 2 31, a cooling fan control unit 2 32, and a filter clogging detection unit 2 3 3 as an example of a filter clogging detection unit.
- the station control unit 2 31 controls the baseband signal processing unit 2 12.
- the cooling fan control unit 232 performs on / off control of the cooling fan 216 according to the temperature inside the housing (internal temperature) detected by the temperature sensor 218.
- the cooling fan controller 2 32 has a hysteresis in the on / off control of the cooling fan 2 16. That is, the condition for performing the on-control when the cooling fan 216 is off is the internal temperature Ta, and the condition for performing the off-control when the cooling fan 216 is on is the internal temperature. It is assumed that Tb has a magnitude relation such that Ta> Tb. By providing a certain difference between the internal temperatures Ta and Tb, frequent on / off operations of the cooling fan 2 16 can be avoided.
- the filter clogging detection section 2 33 is provided with a dustproof filter based on the temperature detected by the temperature sensor 2 18 and the rotation speed of the cooling fan 2 16 detected by the rotation speed detection section 2 19. It detects the clogging of 2 15.
- the number of rotations of the cooling fan 2 16 is equal to or more than a predetermined number
- the temperature detected by the temperature sensor 2 18 is equal to or more than the first predetermined temperature
- the first predetermined temperature is maintained after a predetermined time.
- the filter clogging detector 2 33 determines that the dustproof filter 2 15 is clogged.
- the filter clogging detection section 2 3 3 detects the clogging of the dustproof filter 2 15, it performs maintenance management to send a signal prompting the filter exchange to the base station remote control center 203 via the communication network 202. Instruct the control unit 214.
- the filter clogging detection section 2 3 3 continues to monitor the temperature detected by the temperature sensor 2 18 even after detecting the clogging of the dustproof filter 2 15, and detects the temperature detected by the temperature sensor 2 18.
- the temperature reaches the second predetermined temperature (> the first predetermined temperature)
- it instructs the maintenance management control section 214 to send an alarm signal to the base station remote control center 203, and the radio section 211
- the power supply unit 220 is controlled so as to stop power supply to the baseband signal processing unit 212.
- the cooling fan control unit 232 of the control unit 213 will be described. Turn off 6.
- the outside air temperature is low, the inside of the casing of the radio base station apparatus 201 is in a temperature environment in which the internal circuit operates normally even when the cooling fan 2 16 is turned off.
- the cooling fan control unit 2 32 turns on the cooling fan 2 16.
- the cooling fan 2 16 operates, outside air is taken into the casing of the wireless base station device 201 via the dustproof filter 2 15.
- the filter clogging detection section 2 3 3 of the control section 2 13 is configured to detect the rotation speed of the cooling fan 2 16 detected by the rotation speed detection section 2 19 and the temperature (internal temperature) detected by the temperature sensor 2 18. ), The clogging of the dustproof filter 2 15 is detected.
- the filter clogging detection unit 233 instructs the maintenance management control unit 214 to send a signal prompting filter replacement to the base station remote control center 203 via the communication network 202.
- the filter clogging detection section 2 3 3 is connected to the communication network 2 0 2 Command to the maintenance management control section 214 to send an alarm signal to the base station remote control center 203 via, and stop supplying power to the radio section 211 and baseband signal processing section 212.
- the power supply unit 220 is controlled to perform
- the alarm signal output from the maintenance management control section 214 is generated when the internal temperature falls below ⁇ 4 within a predetermined time or after a predetermined time has elapsed while the internal temperature is ⁇ 4 or higher. The output is stopped. Further, when receiving a reset signal from the base station remote control center 203 while the alarm signal is being output from the maintenance management control unit 214, the control unit 212 sets the radio unit 211 In addition, the power supply unit 220 is controlled to restart the power supply to the baseband signal processing unit 212, and the maintenance management control unit 214 is instructed to stop outputting the alarm signal.
- the rotation speed of the cooling fan 2 16 is equal to or more than a predetermined number, and the temperature detected by the temperature sensor 2 18 is the first predetermined temperature. If the temperature is equal to or higher than the first predetermined temperature after the predetermined time, the dustproof filter 215 is determined to be clogged, and a signal prompting the filter replacement is sent to the base station remote control center 203. to be sending.
- the dustproof filter 2 15 is clogged. Therefore, the clogging of the dustproof filter 215 can be detected without being affected by a change in the environment outside the housing. Also, it is detected by the temperature sensor 2 18 Clogging of the dustproof filter 215 can be detected only when the temperature of the dustproof filter is equal to or higher than the first predetermined temperature.Therefore, even if the dustproof filter 215 is clogged, the temperature inside the housing does not rise too much. During cold winter months, there is no signal to change the filter. Therefore, the labor for replacing the filter can be reduced, and the burden on maintenance personnel can be reduced.
- the base station remote control center 203 After detecting the clogging of the dustproof filter 215, if the temperature detected by the temperature sensor 218 reaches the second predetermined temperature, an alarm signal is sent to the base station remote control center 203. In addition, power supply to the radio unit 211 and the baseband signal processing unit 212 is stopped. Since the wireless section 211 having an amplifier generates a larger amount of heat than other components, in this case, by stopping the function of the wireless section 211, it is possible to suppress a rise in temperature inside the housing. As a result, even if the dustproof filter 215 is not replaced for a long time, the temperature in the housing does not become extremely high.
- control section 214 included in the cooling device of the present embodiment may operate by executing a program.
- the filter clogging detection unit 2 33 is based on the rotation speed of the cooling fan 2 16 detected by the rotation speed detection unit 2 19 and the temperature detected by the temperature sensor 2 18.
- the clogging of the dust-proof filter 2 15 is detected by the filter, it is not limited to the rotation speed detecting section 2 19 as long as it can detect whether the cooling fan 2. 16 is operating normally.
- the clogging information of the dustproof filter 2 15 may be displayed on the LED or the liquid crystal display unit.
- the wireless base station device has been described as an example, but other devices such as a remote monitoring camera may be provided with the cooling device according to the present invention.
- the cooling device of the present embodiment may have a fan control function of the cooling device of the first embodiment.
- antenna 101 and antenna 217, wireless unit 103 and wireless unit 211, temperature sensor 105 and temperature sensor 218, cooling fan 107 and cooling fan 216 May be shared, and the control unit 111 and / or the auxiliary control unit 113 may be shared with the control unit 113.
- the dustproof filter when the temperature inside the housing does not decrease despite the normal operation of the cooling fan, the dustproof filter becomes clogged. Therefore, clogging of the dust filter can be detected without being affected by changes in the environment outside the housing. Also, the clogging of the dustproof filter is detected only when the temperature detected by the temperature detecting section is equal to or higher than the first predetermined temperature. Clogging of the dustproof filter can be detected except during cold winter months when it does not rise.
- the cooling device of the present invention has the effect of being able to operate without hindering the temperature rise in the housing even when the power is turned on in an extremely cold environment, and / or dust protection only in a predetermined situation. This has the effect of detecting clogging of the filter without being affected by changes in the external environment, and has the effect of being useful for communication devices such as wireless base station devices.
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- Microelectronics & Electronic Packaging (AREA)
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- Automation & Control Theory (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
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Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2003057197A JP2004263989A (ja) | 2003-03-04 | 2003-03-04 | フィルタ目詰検出装置 |
JP2003-057197 | 2003-03-04 | ||
JP2003-058809 | 2003-03-05 | ||
JP2003058809A JP4205454B2 (ja) | 2003-03-05 | 2003-03-05 | ファン制御装置 |
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WO2004080142A1 true WO2004080142A1 (ja) | 2004-09-16 |
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PCT/JP2004/002376 WO2004080142A1 (ja) | 2003-03-04 | 2004-02-27 | 冷却装置 |
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Cited By (1)
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CN102032836A (zh) * | 2009-09-25 | 2011-04-27 | 中兴通讯股份有限公司 | 一种基站散热系统和方法 |
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