JP2008140882A - Communication apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve cooling efficiency by forced-air cooling in a functional unit wherein heat is produced. <P>SOLUTION: The communication apparatus is provided with a plurality of functional units. The functional unit 15 with a heat generation part among the functional units is provided with a wiring substrate wherein heat generation parts are mounted and a cooling fan. The heat generation parts are provided in sections along a direction of air flowing for cooling the wiring substrate, and a heatsink is attached to the section. Furthermore, a current plate is provided to the wiring substrate to block the entry of cooling air into other than the section, and the cooling air from the cooling fan is distributed in the heatsink. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a floor-mounted communication device installed at a relay base or the like of a communication system, and more particularly to a communication device that enhances the cooling effect of a heat generating unit.

  A large communication device is provided with a plurality of detachable subrack in the housing, and a unitized unit for each function is detachably mounted on each subrack, and a signal amplifying unit, power supply unit, control unit, etc. This constitutes the main part of the communication device.

  For example, a plurality of relay amplification devices, a plurality of transmission / reception switching / combining devices, and an amplification device switching device, which are functional units, are mounted on the subrack, and a signal amplification unit is configured.

  In the signal amplification unit, the relay amplification device generates a large amount of heat, and the relay amplification device is forcibly air-cooled by a fan or the like.

  A conventional relay amplification apparatus 1 will be described with reference to FIG.

  The relay amplifying apparatus 1 is attached to a subrack (not shown) via a front panel 2, and a chassis 3 is attached to the front panel 2. The chassis 3 extends rearward, and wiring boards are attached to the chassis 3 in a plurality of stages on which required electronic components are mounted. FIG. 5 shows the upper wiring board 4.

  A heat generating component (not shown) is mounted on the upper portion of the wiring board 4, and an electronic component 10 having a small heat generation amount is mounted on the lower portion. A heat sink 5 is further attached to the heat generating component, and the heat of the heat generating component is radiated through the heat sink 5.

  A cooling fan 6 is attached to the front surface of the front panel 2, and the cooling fan 6 sucks air from the front of the front panel 2 in a state where the relay amplifying apparatus 1 is mounted, A cooling airflow 7 is formed from the front to the rear. The heat sink 5 is cooled by the cooling airflow 7.

  Further, the cable 8 from the lower wiring board (not shown) passes through a required portion of the front part of the wiring board 4 to reach the rear part of the chassis 3 and is bundled by a clamp 11 at the lower part of the rear panel 9. It extends outside the relay amplification device 1.

  As described above, the subrack is equipped with a plurality of relay amplifying devices, a plurality of transmission / reception switching / combining devices, and amplifying device switching devices. Each individual cable extends from each functional unit. Connected to another functional unit.

  In the conventional relay amplification apparatus 1 described above, the cooling airflow 7 is configured to flow through the entire surface of the wiring board 4, so that the cooling airflow 7 flows through a part of the wiring board 4 having a small flow resistance. .

  For this reason, the cooling airflow 7 flows more in the lower part where the parts that generate less heat than the heatsink 5 having a large flow path resistance are mounted, and heat dissipation from the heatsink 5 is not performed efficiently.

  Further, since the cable 8 passes over the electronic component 10 below the wiring board 4 and reaches the clamp 11, the cable 8 may interfere with the electronic component 10, and the cable 8 may be used during maintenance such as component replacement. In some cases, the process becomes complicated.

  In addition, when cables from individual functional units are connected to other functional units for each cable, the cables occupy the rear part of the subrack, which hinders the outflow of wind from the rear part of the subrack. As a result, the ventilation condition inside the relay amplification device 1 is deteriorated.

JP 2004-200453 A

  In view of such circumstances, the present invention improves the cooling efficiency by forced air cooling in a functional unit that generates heat, simplifies the wiring within the functional unit and the wiring between the functional units, and performs wiring processing. The present invention provides a communication device that can perform efficiently.

  The present invention provides a communication device including a plurality of functional units, the functional unit having a heat generating portion among the functional units, and includes a wiring board on which a heat generating component is mounted, and a cooling fan. The heat generating component is provided in a section along the cooling air flow direction of the wiring board, a heat sink is attached to the section, and a rectifying plate for blocking cooling air from flowing into other sections other than the section is provided on the wiring board. And a communication device configured such that cooling air from the cooling fan flows through the heat sink.

  According to the present invention, in a communication device including a plurality of functional units, the functional unit having a heat generating portion among the functional units includes a wiring board on which a heat generating component is mounted and a cooling fan. The heat generating component is provided in a section along the cooling air flow direction of the wiring board, and a heat sink is attached to the section, and a rectifying plate is provided to block cooling air from flowing into other sections other than the section. Since the cooling air from the cooling fan is provided on the wiring board and flows through the heat sink, the flow rate of the cooling air flowing through the heat sink is increased, and the cooling effect of the heat-generating component is improved. Demonstrate.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 shows a signal amplifying unit 13 of a communication apparatus according to the present invention. The signal amplifying unit 13 includes a subrack 14 and a plurality of relays (four in the figure) mounted on the subrack 14. The amplifying device 15, the amplifying device switching machine 16, and a plurality (three in the figure) of transmission / reception switching / combining machine 17 are configured.

  First, the subrack 14 will be described with reference to FIG. FIG. 2 is a perspective view of the subrack 14 from the rear.

  A plurality (three in the figure) of upper bars 21 are provided on the upper ends of the left and right side panels 19, 20, and are extended over the left and right side panels 19, 20, a lower shelf 22, and a middle shelf 23. The upper shelf 24 is provided horizontally. A connector panel 25 is vertically attached to the rear side of the lower shelf 22.

  The transmission / reception switching / combining machine 17 is mounted on the upper shelf 24, the amplifier switching device 16 is mounted on the middle shelf 23, and the relay amplification device 15 is mounted on the lower shelf 22. .

  A wiring duct 26 having a concave cross section is vertically mounted between the middle shelf 23 and the lower shelf 22, and a duct cover 27 is detachably attached to the wiring duct 26. A terminal plate 28 is provided below the wiring duct 26, and the terminal plate 28 is covered by a lower protective cover 29. Further, an upper protective cover 31 is attached to the rear end of the upper shelf 24, and the upper protective cover 31 covers a connector group (not shown) provided in the amplifier switching device 16.

  A guide piece 32 for attaching the relay amplifying device 15 is cut and raised on the lower shelf 22, and a guide piece 33 for attaching the transmission / reception switching / combining machine 17 is cut and raised on the upper shelf 24.

  With reference to FIG. 3, the relay amplification device 15 according to the present embodiment will be described. In FIG. 3, the same components as those shown in FIG. 5 are denoted by the same reference numerals, and the description thereof is omitted.

  The chassis 3 is provided with wiring boards in a plurality of stages, a heating component (not shown) is mounted on the upper wiring board 4, and an electronic component 10 with a small amount of heat generation is mounted on the lower part. That is, the wiring board 4 is mounted with a portion where the heat generating component is provided and an electronic component with a small amount of heat generated.

  A heat sink 5 is provided so as to be in close contact with the heat generating component, and fins 34 of the heat sink 5 are formed in a horizontal direction.

  A rectifying plate 35 is attached to the wiring board 4 between the lower surface of the heat sink 5 and the inner wall of the chassis 3, and the upper end of the rectifying plate 35 is located at the front end of the fin 34. . By providing a chassis cover (not shown) on the chassis 3, the right side surface of the chassis 3 in FIG. 3 is closed and the groove of the heat sink 5 is simultaneously covered.

  The rectifying plate 35 divides the interior of the chassis 3 into a front part and a rear part, and a rectifying part 36 that is a substantially closed space is formed between the chassis 3 and the front panel 2. The front end of the groove of the heat sink 5 is open.

  A cable clamp 37 is provided below the rectifying plate 35. The cable clamp 37 has a structure in which the cable can be easily fitted and removed. For example, the cable clamp 37 has a hole partially cut out to the thickness of the cable, and a rubber bush is fitted around the hole. It is rare, and the cable can be inserted from the notched portion from the lateral direction of the hole without being inserted into the hole.

  The cable 8 inserted through the wiring board 4 and exposed to the rectifying unit 36 is clamped by the cable clamp 37, routed rearward along the lower surface of the chassis 3, and clamped by the clamp 11 on the rear surface, It extends behind the chassis 3 and is connected to a plug-in connector (not shown) or the like. Since the cable 8 is routed along the lower surface portion, the component mounting surface of the wiring board 4 is open without interfering with the electronic component 10 mounted on the wiring board 4, There is no need to consider the processing of the cable 8 such as inspection and replacement of parts, and workability is improved.

  When the relay amplification device 15 is mounted on the subrack 14, it is placed on the lower shelf 22, inserted along the guide piece 32, and attached to the subrack 14 via the front panel 2. The plug-in type connector (not shown) is fitted into the connector 38 provided on the connector panel 25 by inserting the relay amplification device 15.

  When the amplifying device switching device 16 is attached to the subrack 14, it is placed on the middle shelf 23, inserted, and fixed to the subrack 14 with a screw or the like through a front panel. When the transmission / reception switching / synthesizing machine 17 is mounted, it is placed on the upper shelf 24, the guide piece 33 is inserted as a guide, and is fixed to the sub-rack 14 through a front panel.

  Cables (not shown) extending from the transmission / reception switching / combining machine 17 are collected and stored in the wiring duct 26, and the cables from the transmission / reception switching / combining machine 17 are connected to the connector 38. The wiring duct 26 is covered with the duct cover 27. Therefore, the cables can be wired without being individually exposed on the back surface of the sub-rack 14.

  The wiring duct 26 and the duct cover 27 have a concave and highly rigid cross section. When at least the wiring duct 26 is made of a metal material such as a steel plate, it also functions as a reinforcing member, and the rigidity of the subrack 14 is increased. And improvement in strength can be achieved.

  If the wiring duct 26 does not require a function as a reinforcing member, it may be made of a synthetic resin, or a rod-shaped member is provided between the middle shelf 23 and the lower shelf 22 to form a rod-shaped member. Cables may be clamped.

  By integrating the cables on the rear surface of the subrack 14 into a duct or the like, the air permeability of the rear surface of the subrack 14 is improved, and the cooling effect of the relay amplification device 15 is also improved.

  Next, the cooling action in the relay amplification device 15 will be described.

  In a state where the relay amplification device 15 is in operation, the cooling fan 6 is driven, the front air is taken in, and the air is blown into the chassis 3 behind. Since the inside of the chassis 3 is partitioned by the rectifying plate 35 and the flow path to the rear is limited to the heat sink 5, most of the air passes through the heat sink 5 and is exhausted rearward. Therefore, the heat dissipation amount of the heat sink 5 is large, and the heat generating component is effectively cooled via the heat sink 5.

  As described above, most of the cooling air from the cooling fan 6 circulates through the heat sink 5, so a heat-generating component is mounted below the wiring board 4, and the heat sink 5 and the current plate Even if the arrangement of 35 is turned upside down, the cooling effect is not lowered, and restrictions on the arrangement of parts are eliminated.

  FIG. 4 shows another embodiment of the present invention.

  In another embodiment, the air blown to the rectifying unit 36 is more effectively guided to the heat sink 5.

  That is, the flow straightening plate 35 is inclined so that the flow passage cross section gradually decreases from the front to the rear, the flow resistance is reduced, and the air blown from the cooling fan 6 is smoothly filled without stagnating. This is distributed to the heat sink 5.

  Thus, in this other embodiment, energy loss is reduced, the flow rate of wind passing through the heat sink 5 is increased, and the cooling effect is further increased.

  Needless to say, the present invention is not limited to the relay amplifying device 15 but can be applied to various units having a heat generating portion and forced-air cooling. Further, the relay amplifying device 15 may be structured to be directly attached to the casing without using a subrack.

  Further, although the relay amplification device 15 is mounted so that the wiring board 4 is vertical, the relay amplification device 15 can be similarly implemented when mounted horizontally.

(Appendix)
The present invention includes the following embodiments.

  (Supplementary note 1) In a communication device including a plurality of functional units, the functional unit having a heat generating portion among the functional units includes a wiring board on which heat generating components are mounted, and a cooling fan. The heat generating component is provided in a section along the cooling air flow direction of the wiring board, a heat sink is attached to the section, and a rectifying plate for blocking cooling air from flowing into other sections other than the section is provided on the wiring board. The communication device is configured so that cooling air from the cooling fan flows through the heat sink.

  (Supplementary note 2) The communication device according to supplementary note 1, wherein the rectifying plate is inclined with respect to a flow direction and guides the cooling air to the heat sink.

  (Supplementary Note 3) The rectifying plate is provided with a cable clamp, and the cable clamp binds the cable passing through the functional unit and fixes the cable so as not to interfere with the electronic component mounted on the wiring board. The communication apparatus according to appendix 1.

  (Supplementary Note 4) The functional unit is housed in a subrack, and the subrack has a plurality of shelves on which the functional unit is placed, and a bar extending over the upper and lower shelves is provided on the rear surface of the subrack. The communication apparatus according to appendix 1, wherein cables are clamped to the bar.

  (Supplementary note 5) The communication device according to supplementary note 4, wherein the bar is a wiring duct having a U-shaped cross section, and the wiring duct accommodates the cables and functions as a strength member.

It is a perspective view which shows the signal amplification part of the communication apparatus which concerns on this invention. It is a perspective view of the subrack of the communication apparatus which concerns on this invention. It is a perspective view of the relay amplification apparatus which is one of the functional units which comprise a signal amplification part. It is a perspective view of the relay amplification apparatus in other embodiment of this invention. It is a perspective view of the conventional relay amplification apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 4 Wiring board 5 Heat sink 6 Cooling fan 8 Cable 10 Electronic component 13 Signal amplification part 14 Subrack 15 Relay amplification apparatus 16 Amplification apparatus switching machine 17 Transmission / reception switching / synthesis machine 26 Wiring duct 27 Duct cover 35 Rectification plate 36 Rectification part

Claims (1)

  In a communication device including a plurality of functional units, the functional unit having a heat generating part among the functional units includes a wiring board on which a heat generating component is mounted, and a cooling fan. The wiring board is provided in a section along the cooling air flow direction, a heat sink is attached to the section, and a rectifying plate is provided on the wiring board for blocking cooling air from flowing into other sections other than the section. A communication device, wherein cooling air from a cooling fan is circulated through the heat sink.

Images