JP6146364B2 - Power converter - Google Patents

Description

  The present invention relates to a power conversion device.

  Conventionally, for example, a power conversion device is used in the control of an elevator, an air conditioner, and the like. This type of power conversion device is used to house a semiconductor element as a main component in the apparatus body and to cool the semiconductor element. The heat sink is provided (for example, refer to Patent Document 1).

Japanese Patent No. 4936019

  In the power conversion device proposed in Patent Document 1, a heat sink is relatively inserted into a frame constituting the device body, and the heat sink is fixedly disposed at a predetermined position of the frame. A special jig or the like is required to place the frame at a predetermined position on the frame. Therefore, in the above-described power conversion device, there is a possibility that the work for incorporating the heat sink into the frame becomes complicated.

  In view of the above circumstances, an object of the present invention is to provide a power conversion device capable of improving the work efficiency of the work of incorporating a heat sink into a frame.

  In order to achieve the above object, a power conversion device according to the present invention includes a frame in which a rear opening is formed at least on a rear surface and a heat sink for dissipating heat from a semiconductor element housed in the device body is disposed. In the power conversion device, a guide that is disposed on at least one of the frame and the heat sink and guides the heat sink to a predetermined position of the frame when the heat sink is relatively advanced into the frame through the rear opening. A member is provided.

  According to the present invention, in the power conversion device, at least one of the guide members is formed in the vicinity of edge portions facing each other in a predetermined substantially rectangular heat sink arrangement region in the frame. It is characterized by that.

  According to the present invention, in the power converter, the guide member includes a guide inclined portion that is inclined so as to gradually approach the edge portion as the guide member is separated from the rear opening.

  According to the present invention, in the power conversion device, the heat sink includes a heat sink inclined portion that gradually inclines outward toward the rear at the edge portion of the front end surface.

  According to the present invention, the guide member disposed in at least one of the frame and the heat sink guides the heat sink to a predetermined position of the frame when the heat sink is relatively advanced into the frame through the rear opening. Thus, the heat sink can be positioned with respect to the frame without requiring a dedicated jig or the like as in the prior art, and the working efficiency of the work of incorporating the heat sink into the frame can be improved.

FIG. 1 is a side view schematically showing a power conversion device according to an embodiment of the present invention. FIG. 2 is a rear view showing a case where the frame constituting the power conversion device shown in FIG. 1 is viewed from the rear side. FIG. 3 is a cross-sectional side view schematically showing the operation of assembling the fin unit into the frame. FIG. 4 is a cross-sectional side view schematically showing the work of assembling the fin unit into the frame. FIG. 5 is a cross-sectional side view schematically showing the operation of assembling the fin unit into the frame.

  Exemplary embodiments of a power conversion device according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a side view schematically showing a power conversion device according to an embodiment of the present invention. The power conversion device illustrated here includes a device main body 1.

  The apparatus main body 1 includes a storage main body 2 and a frame 10. The storage body 2 is a box having a rectangular shape with an open rear surface, and is connected to the frame 10 so as to cover the front area of the frame 10.

  The storage body 2 is formed of a resin material such as plastic, and defines a storage space 3 for storing various control devices between the storage body 2 and the frame 10.

  The frame 10 is made of a resin material such as plastic or a metal material such as aluminum (or aluminum alloy). The frame 10 includes a front part 11 covered by the storage body 2 so as to face the inside of the storage body 2 and a pair of left and right side parts 12 extending from the left and right ends of the front part 11 toward the front and rear. By being formed integrally, ventilation openings 13 and 14 through which external air passes are formed on the upper surface and the lower surface, and a rear opening 15 is also formed on the rear surface.

  And the ventilation opening 13 of the upper surface is obstruct | occluded by the ventilation fan F supported by the flame | frame 10 being arrange | positioned. Here, the blower fan F is driven to introduce outside air into the frame 10 through the ventilation opening 14 formed on the lower surface, and the air that has passed through the inside of the frame 10 is made outside through the ventilation opening 13 on the upper surface. To be sent. Further, the ventilation opening 14 on the lower surface is appropriately covered with a filter or the like (not shown).

  As shown in FIG. 1, the frame 10 is provided with a fin unit 20 that is a heat sink.

  The fin unit 20 is formed of a high thermal conductivity material having good thermal conductivity such as aluminum (or aluminum alloy), and includes a base portion 21 and a plurality of fins 22.

  The base portion 21 has a substantially flat plate shape, and is attached to the front surface portion 11 so as to close an attachment opening 11 a (see FIG. 2 and the like) formed in the front surface portion 11 of the frame 10. A semiconductor element H such as an IGBT (Insulated Gate Bipolar Transistor) is thermally connected to the front surface of the base portion 21 so as to penetrate the mounting opening 11a.

  The plurality of fins 22 each have a thin plate shape. These fins 22 are arranged in a standing posture at predetermined intervals so as to be arranged along the left-right direction on the rear surface of the base portion 21.

  As shown in FIG. 2, a plurality of (four in the illustrated example) guide members 16 are provided on the frame 10 on which the fin unit 20 is disposed.

  The guide member 16 is a thin plate that is integrally formed in a manner of projecting rearward on the rear surface of the front surface portion 11 of the frame 10. These guide members 16 are provided in the vicinity of edge portions S1 and S2 facing each other in a predetermined substantially rectangular fin unit arrangement region (heat sink arrangement region) S on the rear surface of the front surface portion 11 of the frame 10. It has been.

  More specifically, of the four guide members 16, the two upper guide members 16 a are arranged in the vertical direction in the vicinity of the upper side edge portion S <b> 1 in the fin unit disposition region S while being separated from each other left and right. It is arranged in an extending manner. Further, the remaining two lower guide members 16b are disposed in the vicinity of the lower side edge portion S2 in the fin unit disposition region S so as to extend along the vertical direction while being separated from each other in the left-right direction. Yes.

  The upper guide member 16a is formed with an upper guide inclined portion 17a as shown in FIG. The upper guide inclined portion 17 a is formed from a part on the lower side of the rear end portion of the upper guide member 16 a to a part on the rear side of the lower end portion of the upper guide member 16 a and is separated from the rear opening 15. Accordingly, it is inclined downward so as to gradually approach the upper side edge S1 in the fin unit disposition region S.

  Further, as shown in FIG. 3, the lower guide member 16b is formed with a lower guide inclined portion 17b. The lower guide inclined portion 17b is formed from a portion on the upper side of the rear end portion of the lower guide member 16b to a portion on the rear side of the upper end portion of the lower guide member 16b, and is separated from the rear opening 15. Accordingly, it is inclined upward so as to gradually approach the lower edge S2 in the fin unit disposition region S.

  Furthermore, also in the fin unit 20 arrange | positioned at such a flame | frame 10, as shown in FIG. 3, the fin inclination part (heat sink inclination part) 23 is formed. The fin inclined portion 23 has an upper fin inclined portion 23a and a lower fin inclined portion 23b.

  The upper fin inclined portion 23a is formed in a manner that gradually inclines upward (outward) toward the rear at the upper edge portion of the front end surface of the base portion 21 in the fin unit 20. The lower fin inclined portion 23b is formed in a manner that gradually inclines downward toward the rear at the lower edge portion of the front end surface of the base portion 21 in the fin unit 20.

  In order to arrange the fin unit 20 in the frame 10, as shown in FIG. 3, the fin unit 20 is inserted into the frame 10 so that the fin unit 20 relatively enters the inside of the frame 10 through the rear opening 15 of the frame 10. It is necessary to perform work to be incorporated into

  In the operation of assembling the fin unit 20 into the frame 10, even when the fin unit 20 is located slightly above the fin unit installation region S as shown in FIG. The fin unit 20 can be moved downward relative to the frame 10 by sliding the upper fin inclined portion 23a of the fin unit 20 in sliding contact with the upper guide inclined portion 17a of the member 16a. As a result, as shown in FIG. 5, the fin unit 20 can be disposed in the fin unit disposition region S, and then the fin unit 20 is fixedly disposed on the front surface portion 11 of the frame 10 via a fastening member such as a screw. Can be made.

  Here, as an example, the case where the fin unit 20 is positioned slightly above the fin unit arrangement area S has been described. However, the fin unit 20 is slightly below the fin unit arrangement area S. Even when the fin unit 20 is positioned, the lower fin inclined portion 23b of the fin unit 20 is in sliding contact with the lower guide inclined portion 17b of the lower guide member 16b formed on the frame 10, so that the fin unit 20 is relative to the frame 10. Can be moved upward. As a result, the fin unit 20 can be disposed in the fin unit disposition region S, and thereafter, the fin unit 20 can be fixedly disposed on the front surface portion 11 of the frame 10 via a fastening member such as a screw.

  As described above, according to the power conversion device according to the embodiment of the present invention, the guide member 16 formed in the frame 10 causes the fin unit 20 to relatively enter the inside of the frame 10 through the rear opening 15. When the fin unit 20 is assembled, the fin unit 20 is guided to the fin unit disposition region S, so that the fin unit 20 is positioned with respect to the frame 10 without using a special jig or the like as in the prior art. Therefore, it is possible to improve the work efficiency of the work of incorporating the fin unit 20 into the frame 10.

  According to the power conversion device, the guide member 16 is formed on the rear surface of the front portion 11 of the frame 10, so that the guide member 16 functions as a rib and serves as a reinforcing material for the frame 10. Thus, the strength of the frame 10 can be improved.

  According to the power converter, the upper guide inclined portion 17a and the lower guide inclined portion 17b are formed by forming the upper guide inclined portion 17a on the upper guide member 16a and the lower guide inclined portion 17b on the lower guide member 16b. The fin unit 20 can be guided easily by sliding the fin unit 20 in sliding contact with the end surface of the fin unit 20. Further, since the upper fin inclined portion 23a and the lower fin inclined portion 23b are also formed in the fin unit 20, the guide member 16 is brought into sliding contact with the end surfaces of the upper fin inclined portion 23a and the lower fin inclined portion 23b. The guide of the fin unit 20 can be made easy.

  As mentioned above, although preferred embodiment and its modification example of this invention were described, this invention is not limited to these, A various change can be made.

  In the embodiment described above, the guide inclined portions (upper guide inclined portion 17a and lower guide inclined portion 17b) are formed on the guide member 16 (upper guide member 16a and lower guide member 16b), and the fin inclined portion is formed on the fin unit 20. 23 (the upper fin inclined portion 23a and the lower fin inclined portion 23b) are formed. However, in the present invention, the guide inclined portion may be formed only on the guide member, or the heat sink inclined portion is formed on the heat sink. It may just be done.

  In the embodiment described above, the guide member 16 is formed in the vicinity of the upper edge end S1 and the lower edge end S2 of the fin unit disposition region S. However, in the present invention, the guide member 16 is determined in advance in the frame. If guide members are disposed in the vicinity of the opposite edge portions of the substantially rectangular heat sink arrangement region, the number and shape of the guide members and the formation of the guide members at the other edge portions Is not particularly limited. For example, the guide member is formed in the vicinity of the right side edge and the left side edge of the fin unit arrangement region S, or the upper side edge S1 and the lower side edge of the fin unit installation region S. You may make it form in each vicinity of edge part S2, right side edge edge part, and left side edge edge part.

  In the above-described embodiment, the guide member 16 is formed on the frame 10, but in the present invention, it may be formed on a heat sink (fin unit).

DESCRIPTION OF SYMBOLS 1 Apparatus main body 2 Storage main body 10 Frame 11 Front part 11a Mounting opening 12 Side part 15 Back opening 16 Guide member 16a Upper guide member 16b Lower guide member 17a Upper guide inclined part 17b Lower guide inclined part 20 Fin unit 21 Base part 22 Fin 23 Fin inclined portion 23a Upper fin inclined portion 23b Lower fin inclined portion H Semiconductor element S Fin unit arrangement region S1 Upper side edge portion S2 Lower side edge portion

Claims (2)

In a power conversion device comprising a frame in which a rear opening is formed at least on the rear surface and a heat sink for dissipating heat from a semiconductor element housed in the device body is disposed.
A thin plate that is integrally formed in a manner that protrudes rearward from the rear surface in the vicinity of the edge portions facing each other in a predetermined rectangular heat sink arrangement region on the rear surface of the front surface of the frame. A guide member,
The guide member includes a guide inclined portion that is inclined so as to gradually approach the edge portion as the guide member is separated from the rear opening, and allows the heat sink to relatively enter the inside of the frame through the rear opening. power converter, wherein the benzalkonium to guide the heat sink at a predetermined position of the frame by the heat sink comes into sliding contact with the guide slope portion when. 2. The power conversion device according to claim 1 , wherein the heat sink includes a heat sink inclined portion that gradually inclines outward toward the rear at an edge portion of a front end surface.

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