JP2015023655A - Electric power conversion system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric power conversion system that prevents failure of a circuit device, which is caused by dust intruding into a storage body, while improving cooling efficiency.SOLUTION: An electric power conversion system includes: a storage body 10 which mainly stores a power module 14 therein; and a frame body 20 which forms a device body 1 with the storage body 10, the frame body 20 forming a heat sink in which a cooling fan 22 mounted therein is driven to introduce external air into the interior, pass the air between cooling fins 21b attached to the interior, and then send the air to the exterior and thereby radiates heat from the power module 14. In the device body 1, the interior of the storage body 10 communicates with the interior of the frame body 20 through a communication hole 20c. The device body 1 includes filter members 30 and 40 which are disposed so as to cover openings 12 and 13 formed in the storage body 10.

Description

  The present invention relates to a power conversion device.

  Conventionally, for example, a power conversion device has been used in the control of an elevator, an air conditioner, etc., and this type of power conversion device has a power module such as a circuit device that is a main component stored in a storage body, and this power module. A heat sink is provided to cool the battery. The heat sink includes a frame body that forms an apparatus main body together with the storage main body. The frame body is manufactured by die casting, and a cooling fan and a cooling fin are mounted therein. In such a frame body, when the cooling fan is driven, the outside air is introduced into the interior of the frame body to pass between the cooling fins, and then is sent to the outside to radiate heat from the power module. On the other hand, a plurality of openings are formed in the storage body, and a part of the heat generated inside the storage body is discharged to the outside from the openings.

  However, in the above power conversion device, a part of the heat generated inside the storage body is released through an opening formed in the storage body. However, such release is performed by natural convection of air, and the high load There was a possibility that heat could not be released sufficiently.

  Therefore, in order to increase the release of heat and improve the cooling efficiency, the inside of the storage body is communicated with the inside of the frame body, and the heat inside the storage body is driven by the driving of the cooling fan provided inside the frame body. There is known a power conversion device that forcibly discharges to the outside (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 62-120398

  However, in the above-described power conversion device, the inside of the storage body and the inside of the frame body are communicated, and the heat inside the storage body is forcibly released to the outside by driving a cooling fan provided inside the frame body. Therefore, outside air is sucked into the inside of the opening of the storage main body, and there is a possibility that dust such as dust may enter from the opening. Such intrusion of dust is not preferable because it causes a failure of a circuit device such as a power module.

  In view of the above circumstances, an object of the present invention is to provide a power conversion device capable of preventing a circuit device from being broken due to dust intruding into a storage body while improving cooling efficiency. .

  In order to achieve the above object, a power conversion device according to the present invention includes a storage body that mainly stores circuit equipment therein, and a device body that forms the device body together with the storage body, and a cooling fan mounted therein is driven. And a frame body that constitutes a heat sink that dissipates heat from the circuit device by introducing outside air into the inside and passing between the cooling fins mounted inside and then sending the outside to the outside. The apparatus main body includes a filter member that communicates between the inside of the storage body and the inside of the frame body and that is disposed so as to cover an opening formed in the storage body. To do.

  According to the present invention, in the power conversion device, the filter member is detachably disposed on the device main body by a filter support member disposed in the vicinity of the opening.

  According to the present invention, the apparatus main body communicates with the inside of the storage main body and the inside of the frame body, so that the external air can be forced to enter the inside of the storage main body by driving the cooling fan. Devices inside the storage body can be cooled. In addition, since the filter member is disposed so as to cover the opening formed in the storage body, dust such as dust can be prevented from entering from the opening. Therefore, the cooling fan is driven to force the outside air into the storage body, so that the cooling efficiency of the equipment stored in the storage body can be improved and dust such as dust can be removed from the opening. Since intrusion can be prevented, there is an effect that failure of the circuit device and the like can be prevented.

FIG. 1 is a perspective view showing a power conversion device according to an embodiment of the present invention. FIG. 2 is a schematic diagram schematically showing the internal structure of the power conversion device according to the embodiment of the present invention. 3 is an exploded perspective view showing a part of the power conversion device shown in FIG. FIG. 4 is a schematic diagram for schematically explaining the air flow when the cooling fan is driven.

  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 perspective view showing a power conversion device according to an embodiment of the present invention, and FIG. 2 is a schematic diagram schematically showing an internal structure of the power conversion device according to an embodiment of the present invention. 3 is an exploded perspective view showing a part of the power conversion device shown in FIG. The power conversion device illustrated here includes a device main body 1.

  The apparatus main body 1 includes a storage main body 10 and a frame body 20. The storage body 10 has a rectangular shape with an open rear surface, and is connected to the frame body 20 so as to cover the front area of the frame body 20. The storage main body 10 defines a storage space 11 for storing various control devices between the storage body 10 and the frame body 20. Further, the storage body 10 is formed with an upper surface opening 12 and a side surface opening 13. A plurality of upper surface openings 12 are formed on the upper surface of the storage body 10. A plurality of side openings 13 are formed below the left and right side surfaces of the storage body 10.

  The frame body 20 has a rectangular shape with an upper surface and a lower surface opened, and is formed by die casting, for example. The frame body 20 is provided with a fin unit 21, a cooling fan 22, and a capacitor 23.

  The fin unit 21 is configured by arranging a plurality of cooling fins 21b extending in the vertical direction on the rear surface of the base portion 21a in parallel in the horizontal direction. The base portion 21 a of the fin unit 21 is thermally connected to the power module 14 that passes through the upper opening 20 b of the front surface 20 a of the frame body 20.

  The power module 14 is mounted on the rear surface of the substrate 15 disposed in the storage body 10 and includes a circuit unit including a converter unit that converts the input forward and an inverter unit that reversely converts the output of the converter unit. It is. Such a power module 14 is a known one.

  The cooling fan 22 is disposed so as to close the opening on the upper surface of the frame body 20. The cooling fan 22 is driven to introduce external air into the frame body 20 through a frame opening 24 formed on the lower side of the frame body 20 or on the side surface of the frame body 20, and the air is introduced between the cooling fins 21b. It is a blowing means that passes and sends it out. Since air passes between the cooling fins 21b as described above, heat exchange is positively performed in the fin unit 21, and the frame body 20 constitutes a heat sink of a device such as the power module 14.

  A plurality of capacitors 23 are provided, each of which is electrically connected to the power module 14 via a bus bar (conductor) (not shown), and each of them smoothes the output of the converter unit.

  Such an apparatus main body 1 includes the communication hole 20c, the first filter member 30, and the second filter member 40 in addition to the above configuration. A plurality of communication holes 20 c are formed on the upper side of the front surface 20 a of the frame body 20. The communication hole 20c is for communicating the inside of the frame body 20 and the inside of the storage body 10 (the storage space 11). Thereby, the inside of the frame body 20 and the storage space 11 communicate with each other through the communication hole 20c.

  The first filter member 30 is a plate-like structure including a filter such as a hepa filter, for example, and a handle 30a is provided at the front end thereof. Such a first filter member 30 is arranged in such a manner as to cover the upper surface opening 12 by being supported by the first filter support member 31.

  More specifically, the first filter support member 31 is configured by arranging a left support member 311 and a right support member 312 in a pair of left and right. The left support member 311 includes an upper left extension 311a that extends upward from the left end of the upper surface of the storage body 10, and a left and right extension 311b that extends to the right from the extension end of the upper left extension 311a. A gap having a size that allows the first filter member 30 to enter is formed between the left and right extending portion 311 b and the upper surface of the storage body 10. The right support member 312 includes a right upper extension 312a that extends upward from the right end of the upper surface of the storage body 10, and a right left extension 312b that extends leftward from the extension end of the right upper extension 312a. In addition, a gap of a size that allows the first filter member 30 to enter is formed between the right and left extending portion 312 b and the upper surface of the storage main body 10.

  As shown in FIG. 3, the first filter member 30 enters from the front between the left support member 311 and the upper surface of the storage body 10 and between the right support member 312 and the upper surface of the storage body 10. The first filter member 30 is supported by the first filter support member 31 so as to cover the upper surface opening 12. In addition, the code | symbol 50 in FIG. 1 is a stopper member.

  Further, since the first filter support member 31 allows the first filter member 30 to be supported to move forward, this allows the first filter member 30 to be attached to and detached from the apparatus main body 1 (storage main body 10). It is arranged to be possible.

  The 2nd filter member 40 is a plate-shaped structure provided with filters, such as a hepa filter, for example, and the handle 40a is provided in the front-end part. Such a 2nd filter member 40 is arrange | positioned in the aspect which covers the side surface opening 13 by being supported by the 2nd filter support member 41. FIG.

  More specifically, the second filter support member 41 is configured by arranging an upper support member 411 and a lower support member 412 in a pair of upper and lower sides. The upper support member 411 extends to the right from the upper region of the side opening 13 on the right side surface of the storage body 10, and extends downward from the extended end of the upper right extension 411 a. A vertically extending portion 411b is formed, and a gap having a size that allows the second filter member 40 to enter is formed between the vertically extending portion 411b and the right side surface of the storage body 10. The lower support member 412 includes a lower right extension 412a extending to the right from the lower end of the right side surface of the storage body 10, and a lower upper extension extending upward from the extension end of the lower right extension 412a. 412b, and a gap is formed between the lower upper extension 412b and the right side surface of the storage body 10 to allow the second filter member 40 to enter.

  As shown in FIG. 3, the second filter member 40 enters from the front between the upper support member 411 and the right side surface of the storage body 10 and between the lower support member 412 and the right side surface of the storage body 10. Thus, the second filter member 40 is arranged in a manner to be supported by the second filter support member 41 and to cover the side opening 13.

  Further, since the second filter support member 41 allows the second filter member 40 to be supported to move forward, this allows the second filter member 40 to be attached to and detached from the apparatus main body 1 (storage main body 10). It is arranged to be possible. Although not clearly shown in the drawing, as with the right side surface, the second filter member (40) is supported on the left side surface by the second filter support member (41), so that the left side surface opening (13 ).

  In the power conversion device having such a configuration, the interior of the frame body 20 and the storage space 11 are communicated with each other through the communication hole 20c, so that the upper surface opening 12 is driven by the cooling fan 22 as shown in FIG. External air also enters from the side opening 13 and the intruded air reaches the inside of the frame body 20 through the communication hole 20c and is then released to the outside. In this case, since the first filter member 30 is disposed in a manner covering the upper surface opening 12 and the second filter member 40 is disposed in a manner covering the side surface opening 13, dust such as dust is exposed to the upper surface opening. 12 and the side opening 13 can be prevented from entering.

  Therefore, according to the power conversion device of the present embodiment, since the external air is forcibly entered into the storage space 11 by driving the cooling fan 22, the cooling efficiency is improved by cooling the devices in the storage space 11. In addition, since dusts such as dust can be prevented from entering from the upper surface opening 12 and the side surface opening 13, failure of circuit devices such as the power module 14 can be prevented.

  Moreover, according to the power converter device which is this Embodiment, while the 1st filter member 30 is arrange | positioned by the 1st filter support member 31 so that attachment or detachment is possible, the 2nd filter member 40 is 2nd. Since the filter support member 41 is detachably attached to the apparatus main body 1, if the filter members 30 and 40 are conspicuously soiled, they can be replaced with new filter members. The filtering performance can be improved.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to this, and various modifications can be made.

  In the above-described embodiment, the case where the upper surface opening 12 and the side surface opening 13 of the storage main body 10 are covered with the filter member has been described. However, in the present invention, the location where the opening of the storage main body is provided is not particularly limited. In addition, the method of supporting the filter member may be determined by an optimum one each time.

DESCRIPTION OF SYMBOLS 1 Apparatus main body 10 Storage main body 11 Storage space 12 Upper surface opening 13 Side surface opening 14 Power module 15 Board | substrate 20 Frame body 20c Communication hole 21 Fin unit 21a Base part 21b Cooling fin 22 Cooling fan 23 Capacitor 30 1st filter member 31 1st filter support Member 40 Second filter member 41 Second filter support member

Claims (2)

A storage body that mainly stores circuit devices therein;
An apparatus body is formed together with the housing body, and a cooling fan mounted inside is driven to introduce outside air into the interior and pass between cooling fins mounted inside and then send it out. In a power converter comprising a frame body that constitutes a heat sink that dissipates heat from the circuit device,
The apparatus main body includes a filter member disposed so as to cover an opening formed in the housing main body, and the inside of the housing main body communicates with the inside of the frame body. Conversion device.   The power converter according to claim 1, wherein the filter member is detachably disposed on the apparatus main body by a filter support member disposed in the vicinity of the opening.

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