US20110203774A1 - Heater Control in a Radio Network Node - Google Patents

Heater Control in a Radio Network Node Download PDF

Info

Publication number
US20110203774A1
US20110203774A1 US13/127,173 US200813127173A US2011203774A1 US 20110203774 A1 US20110203774 A1 US 20110203774A1 US 200813127173 A US200813127173 A US 200813127173A US 2011203774 A1 US2011203774 A1 US 2011203774A1
Authority
US
United States
Prior art keywords
heater
flow
arrangement
generating device
flow generating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/127,173
Other languages
English (en)
Inventor
Fredrik Jonsson
Klas Hedberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) reassignment TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HEDBERG, KLAS, JONSSON, FREDRIK
Publication of US20110203774A1 publication Critical patent/US20110203774A1/en
Abandoned legal-status Critical Current

Links

Images

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
    • H05K7/20536—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
    • 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
    • H05K7/206—Air circulating in closed loop within cabinets wherein heat is removed through air-to-air heat-exchanger

Definitions

  • the present invention relates to an arrangement and a method in a radio network node for controlling the temperature in the arrangement and more particular, to an arrangement and method for heater control.
  • a radio communication system of today comprises a radio access network and a number of communication devices.
  • the radio access network is built up of several radio network nodes, in particular, radio base stations.
  • the primary task of a radio base station is to send and receive information to/from the communication devices within a cell served by the radio base station. In many cases, the base station is run 24 hours a day. Therefore, it is of particular interest and importance to ensure that the base station is operable predictably and reliably.
  • the radio base station further comprises a cabinet, which comprises an enclosure for housing circuitry, or electronic equipment, for performing different tasks of the radio base station.
  • the circuitry may comprise a power control unit, a radio unit comprising a radio amplifier, and a filtering unit for performing corresponding tasks.
  • Externally mounted enclosures for mobile radio base stations potentially experience a wide range of ambient temperatures. At low external ambient temperatures, the heating which arises naturally from the electronic equipment is sometimes insufficient to keep the internal temperature sufficiently high. A heater is therefore desired for warming up the air within the enclosure. Further, in a cold start situation in which the internal temperature in the radio base station is below that at which the electronic equipment is operative, a heater is needed to warm up the equipment before starting up the system.
  • resistor heaters for example a metal tube heater or a Positive Temperature Coefficient—heater (PTC-heater) for warming up an enclosure comprising electronic equipment within a radio base station.
  • PTC-heater Positive Temperature Coefficient—heater
  • the temperature of a metal tube heater depends on the temperature of the cooling media temperature, the cooling media flow and the electrical voltage. A higher cooling media temperature, a reduced media flow and a higher electrical voltage give a higher heater temperature.
  • the heat generation of the heater depends on the temperature of the PTC-heater, whereby the higher the temperature the lower the heat generation. This means that the heat generation is dependent on the cooling media temperature and the cooling media flow.
  • a heater used for warming up the air within the cabinet is located in the passage of the media flow for the whole cabinet, i.e. a system media flow.
  • a resistor heater with a high cooling fin density causes a high pressure drop. Consequently, the total system pressure drop will increase and hence the required power consumption for the temperature regulating media flow generation will also increase as the heater is positioned where the system media flow has to pass. If just a part of the media flow is made to pass through the heater, this flow will be very limited because of the pressure drop over the heater, and thus results in a low heat generation for a PTC-heater or a high heater temperature for a metal tube heater.
  • the object is achieved by an arrangement for controlling a heater in a radio network node.
  • the arrangement comprises a heater for warming air in the arrangement and at least a first flow regulating device and a second flow regulating device for generating a general air flow within the arrangement.
  • the heater is arranged in between the first flow regulating device and the second flow regulating device whereby the air flowing through the heater becomes dependent on the setting of the first and second flow regulating devices.
  • the object is achieved by a method for controlling a heater in radio network node arrangement.
  • the arrangement comprises a heater and at least a first flow regulating device and a second flow regulating device for generating a general air flow in the arrangement.
  • the first flow regulating device generates a first fluid flow to one side of the heater and the second flow regulating device generates a second fluid flow to the opposite side of the heater.
  • An advantage with the present invention is that the system pressure drop is minimised due to the position of the heater in between the flow regulating devices whereby the heater is not disturbing the general temperature regulating media flow. Further, there is no need for a separate heater fan and, thus both space and costs are saved by the arrangement and method according the invention. Hence, an improved arrangement and method for heater control in a radio network node is provided in accordance with the object of the invention.
  • FIG. 1 illustrates a side view of a schematic radio network node comprising the arrangement according to the present invention
  • FIGS. 2 a and 2 b show a schematic front view of a part of the arrangement according some embodiments.
  • FIG. 3 is a flow chart showing a method in a radio network node.
  • FIG. 1 shows a side view of a schematic arrangement 100 comprised in a radio network node 200 .
  • the arrangement 100 comprises a heater 101 for warming air within the arrangement, if necessary.
  • the arrangement 100 further comprises at least two flow regulating devices 102 , 103 for generating a general air flow 105 within the arrangement 100 for regulating the temperature of electronic equipment 110 housed within the arrangement.
  • the at least two flow regulating devices 102 , 103 may be for example fans.
  • the heater 101 is positioned in between the first flow generating device 102 and the second flow generating device 103 .
  • the arrangement also comprises a controller 112 for controlling the first and second flow regulating devices 102 , 103 .
  • FIG. 1 is a side view of the arrangement 100 in which the heater 101 and the first and second flow regulating devices 102 , 103 cannot be seen separately. Instead, the box with reference numbers 101 , 102 , 103 represents all three items being the heater 101 and the first and second flow regulating devices 102 , 103 . Further, it is to be understood that the arrangement shown in FIG. 1 is simplified and hence does not show all the parts of a radio network node. For example, the arrangement according to FIG. 1 may also comprise one or more heat exchangers for cooling of electronic equipment, enclosures for housing the equipment and further flow regulating devices.
  • FIGS. 2 a and 2 b show a more detailed front view of a part of the arrangement 100 according to the invention.
  • the heater 101 is positioned in between to the first and second flow regulating devices 102 , 103 .
  • FIG. 2 a shows the arrangement 100 in a heating mode which means that the heater 101 is set to warm air within the arrangement 100 .
  • FIG. 2 b shows the arrangement 100 in a non-heating mode, thus the heater 101 is turned off and the first and second flow regulating devices 102 , 103 generate a general air flow 105 for cooling purposes.
  • the first flow regulating device 102 generates a first air flow 105 a at one side of the heater 101 . This is illustrated by three arrows and the air flow 105 a provides a first portion to the general air flow 105 within the arrangement 100 .
  • the second flow generating device 103 generates a second air flow 105 b at the other side of the heater 101 . This is illustrated by a single arrow and the air flow 105 b provides a second portion to the general air flow 105 within the arrangement.
  • the difference in flow velocity between the first and second air flow 105 a, 105 b, is illustrated by the number of the arrows.
  • the flow velocity of the first portion 105 a of the general air flow 105 is greater than the flow velocity of the second portion 105 b of the general air flow 105 .
  • the heater 101 is positioned in between the first and second flow regulating devices 102 , 103 .
  • the difference in flow velocity on the respective sides of the heater 101 generates a difference in pressure build-up on the two sides of the heater 101 , which generates an air flow 105 c through the heater 101 .
  • the size of the fluid flow 105 c through the heater 101 is determined by the regulation of the first and second flow regulating devices 102 , 103 .
  • the heater 101 temperature or heat generation of the heater 101 can be regulated.
  • the temperature of the heater 101 or heat generation of the heater 101 is regulated without addition of any new parts or components. For example, no specific heater fan is needed.
  • the heater 101 is mounted in a way that no adding to the system pressure drop is made.
  • the heater 101 used in this arrangement 100 may be any kind of resistor heater, such as a metal tube heater or a Positive Temperature Coefficient—heater (PTC-heater), for example.
  • PTC-heater Positive Temperature Coefficient—heater
  • the first flow regulating device 102 generates a first air flow 105 a at one side of the heater 101 .
  • the second flow generating device 103 generates a second air flow 105 b at the other side of the heater 101 .
  • there is no difference in flow velocity between the first and second air flow 105 a, 105 b and no pressure build-up will take place and consequently no air flow occurs through the heater 101 .
  • the heater does not disturb the general air flow 105 when it is not used.
  • the general air flow 105 comprises the first air flow 105 a, the second air flow 105 b and the air flow through the heater 105 c, if any.
  • the radio network node may be a Radio Base Station (RBS) or any other kind of node in a radio communication system, which radio network node comprises heat generating electronic equipment.
  • RBS Radio Base Station
  • Examples of other kinds of nodes are transmission nodes, Remote Subscriber Switches (RSS) and nodes with similar functionality.
  • the arrangement 100 comprises a heater 101 and at least a first flow regulating device 102 and a second flow regulating device 103 for generating a general air flow 105 in the arrangement.
  • the first flow regulating device 102 generates a first air flow 105 a at one side of the heater 101 .
  • the second flow regulating device 103 generates a second air flow 105 b at the opposite side of the heater 101 .
  • the heater temperature or heat generation of the heater 101 is controlled by regulating the first flow regulating device 102 and the second flow regulating device 103 respectively.
  • the control of the heater temperature or heat generation of the heater 101 is based on a difference in flow velocity of the first air flow 105 a and the flow velocity of the second air flow 105 b.

Landscapes

  • 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)
US13/127,173 2008-11-03 2008-11-03 Heater Control in a Radio Network Node Abandoned US20110203774A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE2008/051251 WO2010050865A1 (en) 2008-11-03 2008-11-03 Heater control in a radio network node

Publications (1)

Publication Number Publication Date
US20110203774A1 true US20110203774A1 (en) 2011-08-25

Family

ID=40863394

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/127,173 Abandoned US20110203774A1 (en) 2008-11-03 2008-11-03 Heater Control in a Radio Network Node

Country Status (6)

Country Link
US (1) US20110203774A1 (ja)
EP (1) EP2353349B1 (ja)
JP (1) JP5255705B2 (ja)
ES (1) ES2414647T3 (ja)
MX (1) MX2011004117A (ja)
WO (1) WO2010050865A1 (ja)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6104003A (en) * 1998-10-09 2000-08-15 Ericsson, Inc. Electronics cabinet cooling system
EP1906720A1 (en) * 2005-09-21 2008-04-02 Matsushita Electric Industrial Co., Ltd. Heat exchange type cooling device
US20090262505A1 (en) * 2008-04-16 2009-10-22 Asia Vital Components Co., Ltd. Heat radiator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8115145B2 (en) * 2004-11-29 2012-02-14 Sanmina-Sci Corporation Systems and methods for base station enclosures

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6104003A (en) * 1998-10-09 2000-08-15 Ericsson, Inc. Electronics cabinet cooling system
EP1906720A1 (en) * 2005-09-21 2008-04-02 Matsushita Electric Industrial Co., Ltd. Heat exchange type cooling device
US20090101304A1 (en) * 2005-09-21 2009-04-23 Matsushita Electric Industrial Co., Ltd. Heat exchange type cooling device
US20090262505A1 (en) * 2008-04-16 2009-10-22 Asia Vital Components Co., Ltd. Heat radiator

Also Published As

Publication number Publication date
EP2353349B1 (en) 2013-04-17
JP5255705B2 (ja) 2013-08-07
MX2011004117A (es) 2011-05-03
JP2012507853A (ja) 2012-03-29
ES2414647T3 (es) 2013-07-22
WO2010050865A1 (en) 2010-05-06
EP2353349A1 (en) 2011-08-10

Similar Documents

Publication Publication Date Title
US11019755B2 (en) Effectiveness-weighted control of cooling system components
US7778029B2 (en) System comprising heat-generator and cooler thereof, and disk array system
US9052722B2 (en) Dynamically limiting energy consumed by cooling apparatus
US20070100494A1 (en) Cooling components across a continuum
US7746638B2 (en) Electronic device
CA2406331A1 (en) Thermal management system
US9198329B2 (en) Method and cabinet for controlling temperature in the cabinet
JP2014234992A (ja) 冷却システム、冷却式コンピュータシステムおよびコンピュータ設備
US20110203774A1 (en) Heater Control in a Radio Network Node
KR20070059911A (ko) 열전소자를 이용한 수냉식 냉난방기
US10823185B2 (en) Motor interface assembly and a method of using the same
JP4375406B2 (ja) 冷却装置
US20110209863A1 (en) Climate Control in a Radio Network Node
CN110879077A (zh) 车辆的传感器单元
EP2347642B1 (en) A system in a network node for regulating temperature of electronic equipment
CN114340307A (zh) 一种小型化电源模块及包括其的机箱和用电设备
US6096967A (en) Energy conversion system with heat recovery
US20220183189A1 (en) A system and an application for the regulation of temperature in a server room
Pfahnl Rackmount Liquid Cooler

Legal Events

Date Code Title Description
AS Assignment

Owner name: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:JONSSON, FREDRIK;HEDBERG, KLAS;REEL/FRAME:026635/0451

Effective date: 20081107

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION