Power conversion device

Abstract

To provide a power conversion device 100 capable of protecting a power conversion device main body and a cover member against external impact.SOLUTION: This power conversion device 100 includes a power conversion device main body 1 and a cover member attached to the power conversion device main body 1, and the cover member includes a cover main body portion, a device main body mounting portion, and a buffer portion disposed between the cover main body portion and the power conversion device main body 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a power converter, and more particularly to a power converter to which a cover member is attached. [Background technology]

[0002] 2. Description of the Related Art Conventionally, a power conversion device having a cover member is known (see, for example, Patent Document 1).

[0003] The above-mentioned Patent Document 1 discloses an inverter device (power conversion device) including an inverter device main body provided with slits for heat dissipation and a protective cover that covers the inverter device main body. In the above-mentioned Patent Document 1, the protective cover is attached to the inverter device main body so as to cover the slits for heat dissipation. In addition, in the above-mentioned Patent Document 1, a gap is provided between the protective cover and the inverter device, so that when an impact is applied to the protective cover from the outside, the gap absorbs part of the impact, thereby protecting the inverter device main body from the external impact. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-99174 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the power conversion device (inverter device) of the above Patent Document 1, depending on the magnitude of the impact, the external impact may not be absorbed and may be directly applied to the inverter device main body. Therefore, there is a demand for reliable protection of the inverter device main body against external impacts.

[0006] The present invention has been made to solve the above-mentioned problems, and one object of the present invention is to provide a power conversion device that can protect the power conversion device main body against external impacts. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, a power conversion device according to one aspect of the present invention comprises a power conversion device main body having a plurality of ventilation holes, and a cover member attached to the power conversion device main body and covering the ventilation holes, the cover member including a cover main body portion, a device main body mounting portion for mounting the cover main body portion to the power conversion device main body, and a buffer portion disposed between the cover main body portion and the power conversion device main body.

[0008] As described above, in the power conversion device according to one aspect of the present invention, the buffer section buffers external shocks, thereby making it possible to protect the power conversion device main body against external shocks.

[0009] In the power converter according to the above aspect, preferably, the buffer portion has a protruding portion protruding from the cover body portion toward the power converter body. With this configuration, since the buffer portion has the protruding portion, a gap can be easily formed between the cover body portion and the power converter body, and the formed gap and the buffer portion can further reduce external impacts. As a result, external impacts applied to the power converter body are further reduced, and the power converter body can be effectively protected against external impacts.

[0010] In this case, the protrusion is preferably formed integrally with the cover body. With this configuration, unlike the case where the cover body and the protrusion are separate, it is not necessary to provide the cover body and the protrusion separately, and therefore it is possible to suppress an increase in the number of parts.

[0011] In the power converter in which the buffer portion has a protrusion, preferably, in a cross section cut along the extending direction of the cover body, the cross-sectional area of ​​the protrusion on the power converter body side is smaller than the cross-sectional area of ​​the protrusion on the cover body side. With this configuration, the cross-sectional area of ​​the protrusion on the power converter body side is smaller, so that the protrusion can be formed smaller toward the power converter body, making it easier for the tip of the protrusion to deform due to an external impact. As a result, the energy of the external impact is absorbed by the deformation of the tip of the protrusion, so that both the power converter body and the power converter body can be more effectively protected against the external impact.

[0012] In the power converter according to the above aspect, the protrusion is preferably configured to cushion an external impact by plastically deforming. With this configuration, the tip of the protrusion is plastically deformed upon receiving an external impact, so that the energy of the external impact can be easily absorbed.

[0013] In the power converter according to the above aspect, preferably, a plurality of the buffer parts are provided on the cover body part at a predetermined interval from each other. With this configuration, since the plurality of buffer parts can disperse an external impact, both the power converter body and the cover body can be effectively protected from the external impact. Furthermore, since the buffer parts are arranged at a predetermined interval, the cover body part can be supported by the buffer parts so that the cover member is not inclined with respect to the power converter body when the cover member is attached to the power converter body.

[0014] In the power converter according to the above aspect, preferably, the cover body is formed of a plate-shaped member, and the buffer portion is disposed near a corner of the plate-shaped member. With this configuration, the buffer portion is disposed near the corner of the plate-shaped member, so that the plate-shaped member is more likely to bend near its center. When an external impact is applied to the center of the plate-shaped member, the plate-shaped member bends near its center, so that the external impact can be buffered. Here, the vicinity of the corner is a broad concept including not only a position overlapping the corner, but also a position away from the corner and closer to the corner than the center.

[0015] In this case, the buffer section is preferably disposed near the center of the plate-like member in addition to near the corners. With this configuration, when an external impact is applied to the center, the center of the plate-like member is bent and the buffer section buffers the impact, making it easier to buffer the impact. Here, the term "near the center" is a broad concept that includes not only a position that overlaps with the center, but also a position away from the center and closer to the center than the corners.

[0016] In the power converter according to the above aspect, the device body mounting portion preferably has a fitting portion that fits into the ventilation hole by elastic deformation. With this configuration, the fitting portion is inserted into the ventilation hole in an elastically deformed state, and the fitting portion is returned to its original shape, so that the cover member can be attached to the ventilation hole, and the cover member can be easily attached to the power converter body. In addition, the cover member can be removed from the ventilation hole by elastically deforming the fitting portion, so that the cover member can be easily removed from the power converter body. In addition, since the cover member can be attached by utilizing the ventilation hole, there is no need to provide a dedicated mounting portion, and the structure can be simplified accordingly.

[0017] In the power converter according to the above aspect, preferably, the cover body is formed of a plate-like member, and a plurality of device body mounting parts are provided and arranged on the plate-like member at predetermined intervals. With this configuration, the device body mounting parts are arranged at predetermined intervals, so that the cover member can be attached to the power converter body by the device body mounting parts so that the cover member does not tilt with respect to the power converter body.

[0018] In the power converter according to the above aspect, preferably, the vents are provided on the top and both sides of the power converter body, and the cover members include a top cover member covering the vents provided on the top of the power converter body, a right side cover member covering the vents provided on the right side of the power converter body, and a left side cover member covering the vents provided on the left side of the power converter body, and the top cover member, the left side cover member, and the right side cover member are each provided separately. With this configuration, unlike the case where the top cover member, the left side cover member, and the right side cover member are integrally formed, it is not necessary to prepare a cover member for each power converter having a different external shape. In addition, since each of the top cover member, the left side cover member, and the right side cover member has a buffer portion, external impacts are buffered, so that the top and both sides of the power converter body, the top cover member, the left side cover member, and the right side cover member can be protected from external impacts.

[0019] In this case, the top cover member is preferably formed in an L-shape and configured to cover a part of the right side cover member or the left side cover member. With this configuration, the top cover member can press and fix the right side cover member or the left side cover member, so that the right side cover member or the left side cover member can be more firmly fixed to the power conversion device.

[0020] In the power converter according to the above aspect, the cover body is preferably made of resin and has a groove for suppressing warping. With this configuration, warping of the cover body is suppressed by the groove during resin molding, making it possible to make the cover member less likely to fall off the power converter body.

[0021] In the power conversion device according to the above aspect, preferably, the power conversion device main body includes a first housing part capable of accommodating the power conversion module and having an air vent, and a second housing part connected to the first housing part, and the cover member including the buffer part is attached to the power conversion device main body so as to cover the connection part between the first housing part and the second housing part. With this configuration, by covering the connection part between the first housing part and the second housing part with the cover member, the connection part between the first housing part and the second housing part is pressed against the power conversion device main body by the cover member, and therefore it is possible to prevent the connection state from being released. Effect of the Invention

[0022] According to the present invention, as described above, it is possible to provide a power conversion device capable of protecting the main body of the power conversion device against external impacts. [Brief description of the drawings]

[0023] [Figure 1] 1 is a front view of a power conversion device according to a first embodiment. [Diagram 2] FIG. 2 is a top view of the power conversion device according to the first embodiment. [Diagram 3] FIG. 2 is a left side view of the power conversion device according to the first embodiment. [Figure 4] FIG. 2 is a right side view of the power conversion device according to the first embodiment. [Diagram 5] FIG. 2 is a front view of a top cover member according to the first embodiment. [Figure 6] FIG. 4 is a bottom view of the top cover member according to the first embodiment. [Figure 7] FIG. 4 is a perspective view of a left side cover member according to the first embodiment. [Figure 8]FIG. 4 is a perspective view of a right side cover member according to the first embodiment. [Figure 9] 5A and 5B are diagrams showing how a cover member is attached, in which (A) shows the state before the cover member is attached, and (B) shows the state after the cover member has been attached. [Figure 10] 5A and 5B are diagrams showing a power converter according to a second embodiment, in which (A) shows a state before a cover member is attached, and (B) shows a state after the cover member is attached. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[0025] [First embodiment] The configuration of a power conversion device 100 according to the first embodiment will be described.

[0026] As shown in FIG. 1, the power converter 100 is provided with an operation unit 50. In this embodiment, the side where the operation unit 50 is provided is the front side, which is the Y1 side, the rear side opposite to the Y1 side is the Y2 side, and the direction connecting the Y1 side and the Y2 side is the Y direction. The vertical direction perpendicular to the Y direction is the Z direction, the top side is the Z1 side, and the bottom side is the Z2 side. The horizontal direction perpendicular to the Y direction and the Z direction is the X direction, and the left side when looking at the Y2 side from the Y1 side is the X1 side, and the right side is the X2 side.

[0027] The power conversion device 100 includes a power conversion device main body 1, a top cover member 2, a left side cover member 3, and a right side cover member 4. The top cover member 2, the left side cover member 3, and the right side cover member 4 can be attached to the power conversion device main body 1, and can also be detached from the power conversion device main body 1. The top cover member 2, the left side cover member 3, and the right side cover member 4 are examples of the "cover member" described in the claims.

[0028] As shown in Figs. 2 to 4, the power conversion device 100 is, for example, an inverter device. A power conversion module is housed inside the power conversion device main body 1. The power conversion device main body 1 has an air vent 11, and is capable of releasing heat generated from the power conversion module. In the first embodiment, the power conversion device 100 is operated so as to suppress the amount of heat generated inside the power conversion device main body 1. The power conversion device main body 1 is formed of a resin containing polyphenylene oxide (noryl resin).

[0029] A plurality of ventilation holes 11 are provided on each of the top surface, the left side surface, and the right side surface of the power conversion device main body 1. The plurality of ventilation holes 11 are openings formed by beam portions 11a and partitioned by the beam portions 11a. The ventilation holes 11 are provided to release heat generated inside the power conversion device main body 1 to the outside. In the first embodiment, the power conversion device 100 is operated so that the temperature inside the power conversion device main body 1 does not become too high. Therefore, since it is not necessary to actively release heat through the ventilation holes 11, a top cover member 2, a left side cover member 3, and a right side cover member 4 can be provided for the ventilation holes 11.

[0030] As shown in Fig. 3 and Fig. 4, the power conversion device main body 1 includes a first housing part 1a capable of accommodating a power conversion module and having a vent hole 11, and a second housing part 1b connected to the first housing part 1a. The first housing part 1a is open on the Y1 side, and the second housing part 1b is open on the Y2 side. The second housing part 1b is attached to the first housing part 1a and connected by a connection part 1c, thereby forming the power conversion device main body 1. The connection part 1c includes, for example, an engagement part provided in the second housing part 1b (not shown) and a hole part (not shown) provided in the first housing part 1a with which the engagement part (not shown) engages.

[0031] 2, the top cover member 2 is attached to the top surface of the power conversion device main body 1. The top cover member 2 is attached so as to cover the ventilation hole 11 provided on the top surface of the power conversion device main body 1. The top cover member 2 is formed of the same resin containing polyphenylene oxide (noryl resin) as the power conversion device main body 1.

[0032] 3, the left side cover member 3 is attached to the left side surface of the power conversion device main body 1. The left side cover member 3 is attached so as to cover the ventilation hole 11 provided on the left side surface of the power conversion device main body 1. The left side cover member 3 is formed of the same resin containing polyphenylene oxide (noryl resin) as the power conversion device main body 1.

[0033] 4, the right side cover member 4 is attached to the right side of the power conversion device main body 1. The right side cover member 4 is attached so as to cover the ventilation hole 11 provided on the right side of the power conversion device main body 1. The right side cover member 4 is made of the same resin containing polyphenylene oxide (noryl resin) as the power conversion device main body 1.

[0034] [Details of the top cover part] As shown in Figs. 5 and 6, the top cover member 2 includes a top cover main body 21, an top device main body mounting portion 22, and a top buffer portion 23. The top cover main body 21, the top device main body mounting portion 22, and the top buffer portion 23 are integrally formed. The top device main body mounting portion 22 and the top buffer portion 23 are provided on the surface of the top cover main body 21 facing the power conversion device main body 1. The top cover main body 21 is an example of a "cover main body portion" as recited in the claims. The top device main body mounting portion 22 is an example of a "device main body mounting portion" as recited in the claims. The top buffer portion 23 is an example of a "buffer portion" as recited in the claims.

[0035] The top cover member 2 has an L-shape when viewed from the front side. Specifically, the top cover body 21 of the top cover member 2 is attached to the top surface of the power conversion device main body 1, and is integrally formed with a rectangular first top plate member 21a and a rectangular second top plate member 21b that covers a part of the right side cover member 4. In FIG. 5, the second top plate member 21b includes a curved portion 2a, but may not include the curved portion 2a. In the first embodiment, in a front view, the length L1 in the extension direction (X direction) of the first top plate member 21a is greater than the length L2 in the extension direction (Z direction) of the second top plate member 21b. The aspect ratio (ratio of vertical length to horizontal length) of the first top plate member 21a is small. The first top plate member 21a and the second top plate member 21b are examples of the "plate member" described in the claims.

[0036] As shown in FIG. 9, the top device body mounting part 22 is configured to mount the top cover body part 21 to the power conversion device body 1. The top device body mounting part 22 has a fitting part 22a that fits into the beam part 11a of the ventilation hole 11 by elastic deformation. The fitting part 22a is, for example, a snap fit, and is inserted into the ventilation hole 11 while being pressed inward (the fitting part 22a on the X1 side is the X2 side, and the fitting part 22a on the X2 side is the X1 side), and the fitting part 22a is elastically deformed outward (the fitting part 22a on the X1 side is the X1 side, and the fitting part 22a on the X2 side is the X2 side), thereby fitting (hooking) into the beam part 11a of the ventilation hole 11. The top device body mounting part 22 is provided on the first top plate member 21a, but not on the second top plate member 21b.

[0037] As shown in Fig. 6, the upper device main body mounting parts 22 are arranged at a predetermined interval on the first upper device plate member 21a. The upper device main body mounting parts 22 are arranged corresponding to the positions of the ventilation holes 11. As shown in Fig. 6, the upper device main body mounting parts 22 are arranged in four locations. However, the number of locations at which the upper device main body mounting parts 22 are provided is not particularly limited as long as it is two or more. Also, although an example in which they are arranged on both end faces in the X direction is shown, they may be arranged in the center in the X direction.

[0038] The upper surface buffering parts 23 are provided in the upper surface cover main body 21 at a predetermined interval from each other. Specifically, the upper surface buffering parts 23 are arranged near the corners 2b of the first upper surface plate member 21a. Here, the vicinity of the corners 2b is a broad concept including not only a position overlapping the corners 2b but also a position away from the corners 2b and closer to the corners 2b than the center. The upper surface buffering parts 23 are arranged at four locations at the four corners. Furthermore, the upper surface buffering parts 23 are arranged near the center in addition to the vicinity of the corners. Here, the vicinity of the center is a broad concept including not only a position overlapping the center but also a position away from the center and closer to the center than the corners. In the case of FIG. 6, two upper surface buffering parts 23 are arranged above and below the center. Note that the upper surface buffering parts 23 arranged near the center are arranged at two or more locations. The upper surface buffering parts 23 are provided on the first upper surface plate member 21a but not on the second upper surface plate member 21b.

[0039] The top surface buffer section 23 is disposed between the top surface cover main body section 21 and the power conversion device main body 1, and is in contact with the power conversion device main body 1. The top surface buffer section 23 brings the top surface cover main body section 21 and the power conversion device main body 1 into contact with each other. A gap G (see FIG. 9 ) is formed between the power conversion device main body 1 and a portion of the surface of the top surface cover main body section 21 facing the power conversion device main body 1 other than the portion where the top surface device main body mounting section 22 and the top surface buffer section 23 are provided. Therefore, the top surface cover main body section 21 can bend toward the gap, and can buffer external impacts.

[0040] The top cushioning section 23 cushions external shocks. Specifically, the top cushioning section 23 has a protruding section 23a that protrudes from the top cover main body section 21 toward the power conversion device main body 1 and cushions external shocks. In a cross section cut along the extension direction (X direction) of the top cover main body section 21, the cross-sectional area of ​​the protruding section 23a on the power conversion device main body 1 side (Z2 side) is smaller than the cross-sectional area of ​​the protruding section 23a on the top cover main body section 21 side (Z2 side).

[0041] The protrusion 23a has a tapered shape tapering from the top cover main body 21 toward the power conversion device main body 1, and is configured to cushion external impacts by plastically deforming (crushing) the tapered tip. FIG. 6 shows an example in which the protrusion 23a has a truncated cone shape. The protrusion 23a is made of the same resin containing polyphenylene oxide (noryl resin) as the power conversion device main body 1 and the top cover main body 21. The protrusion 23a is also formed integrally with the top cover main body 21.

[0042] The top cover member 2 (top cover main body 21) comes into contact with the power conversion device main body 1 via the protrusion 23a. Therefore, the top cover main body 21 on which the protrusion 23a is not formed and the power conversion device main body 1 are arranged spaced apart from each other. In addition, since the top cover main body 21 on which the protrusion 23a is not formed and the power conversion device main body 1 are spaced apart, when an external impact is received, the top cover main body 21 on which the protrusion 23a is not formed will bend. This buffers the external impact.

[0043] [Details of the left side cover part] As shown in Fig. 7, the left side cover member 3 includes a left side cover main body portion 31, a left side device main body mounting portion 32, and a left side cushioning portion 33. The left side cover member 3 has a rectangular shape. The left side cover main body portion 31 is an example of a "cover main body portion" as recited in the claims. The left side device main body mounting portion 32 is an example of an "device main body mounting portion" as recited in the claims. The left side cushioning portion 33 is an example of a "cushioning portion" as recited in the claims.

[0044] The left side cover main body 31 is formed by a left side plate member 31a. The left side cover main body 31, the left side device main body mounting portion 32, and the left side buffer portion 33 are integrally formed. The left side device main body mounting portion 32 and the left side buffer portion 33 are provided on the surface of the left side cover main body 31 facing the power conversion device main body 1. The left side plate member 31a is rectangular with a large aspect ratio (ratio of vertical length to horizontal length).

[0045] 9, the left side device body attachment part 32 is configured to attach the left side cover body part 31 to the power conversion device body 1. The left side device body attachment part 32 has a fitting part 32a that fits into the beam part 11a of the ventilation hole 11 by elastic deformation. The fitting part 32a is, for example, a snap fit, and is inserted into the ventilation hole 11 while being pressed inward, and is elastically deformed outward to fit into the beam part 11a of the ventilation hole 11.

[0046] As shown in FIG. 7, the left side device body attachment part 32 is disposed at a predetermined interval on the left side cover body part 31. The left side device body attachment part 32 is disposed corresponding to the position of the ventilation hole 11. In the example shown in FIG. 7, since the left side device body attachment part 32 is elongated in the Z direction, in addition to two positions near the end on the Z1 side and the end on the Z2 side, the left side device body attachment part 32 is also disposed at a position shifted from the center in the Z direction to the Z2 side in order to prevent warping. The number of left side device body attachment parts 32 may be one or more as long as the left side cover member 3 can be attached to the power conversion device body 1 without warping.

[0047] A plurality of left side cushioning parts 33 are provided on the left side cover main body part 31 at a predetermined interval from each other. Specifically, the left side cushioning part 33 is disposed near the corner 3a of the left side cover main body part 31. Here, the vicinity of the corner 3a is a broad concept including not only a position overlapping the corner 3a but also a position away from the corner 3a and closer to the corner 3a than the center. A plurality of left side cushioning parts 33 are provided. The left side cushioning parts 33 are disposed at two positions at the corner 3a located on the Y1 side. The left side cushioning parts 33 are disposed at two positions shifted from the corner 3a on the Y2 side toward the center. The left side cushioning parts 33 are disposed near the center. In the case of FIG. 7, two positions are disposed above and below the center. The left side cushioning parts 33 disposed near the center are disposed at two or more positions. The left side cushioning parts 33 are made of the same material as the left side cover main body part 31.

[0048] The left side surface buffer section 33 is disposed between the left side surface cover main body section 31 and the power conversion device main body 1, and comes into contact with the power conversion device main body 1. The left side surface buffer section 33 brings the left side surface cover main body section 31 into contact with the power conversion device main body 1. A gap is formed between the power conversion device main body 1 and the portion of the surface of the left side surface cover main body section 31 facing the power conversion device main body 1 other than the portion where the left side surface device main body mounting section 32 and the left side surface buffer section 33 are provided. Therefore, the left side surface cover main body section 31 can bend toward the gap, and can buffer external impacts.

[0049] The left side cushioning part 33 cushions external shocks. Specifically, the left side cushioning part 33 has a protruding part 33a that protrudes from the left side cover main body part 31 toward the power conversion device main body 1 and cushions external shocks. In a cross section cut along the extension direction (X direction) of the left side cover main body part 31, the cross-sectional area of ​​the protruding part 33a on the power conversion device main body 1 side (Z2 side) is smaller than the cross-sectional area of ​​the protruding part 33a on the top cover main body part 21 side (Z2 side).

[0050] The protrusion 33a has a tapered shape tapering from the left side cover main body 31 toward the power conversion device main body 1, and is configured to cushion external impacts by plastically deforming (crushing) the tapered tip. FIG. 7 shows an example in which the protrusion 33a has a truncated cone shape. The protrusion 33a is made of the same resin containing polyphenylene oxide (noryl resin) as the power conversion device main body 1 and the left side cover main body 31. The protrusion 33a is also formed integrally with the left side cover main body 31.

[0051] The left side cover member 3 (left side cover main body 31) comes into contact with the power conversion device main body 1 via the protrusion 33a. Therefore, the left side cover main body 31 on which the protrusion 33a is not formed and the power conversion device main body 1 are arranged spaced apart from each other. Also, since the left side cover main body 31 on which the protrusion 33a is not formed and the power conversion device main body 1 are spaced apart, when an external impact is received, the left side cover main body 31 on which the protrusion 33a is not formed will bend. This cushions the external impact.

[0052] [Details of the right side cover part] As shown in FIG. 8, the right side cover member 4 includes a right side cover main body portion 41, a right side device main body mounting portion 42, a right side buffer portion 43, and a groove portion 44. The right side cover main body portion 41, the right side device main body mounting portion 42, and the right side buffer portion 43 are integrally formed. The right side device main body mounting portion 42 and the right side buffer portion 43 are provided on the surface of the right side cover main body portion 41 facing the power conversion device main body 1. The right side cover main body portion 41 is an example of a "cover main body portion" described in the claims. The right side device main body mounting portion 42 is an example of a "device main body mounting portion" described in the claims. The right side buffer portion 43 is an example of a "buffer portion" described in the claims.

[0053] The right side cover main body 41 is formed by a first right side plate member 41a located on the Z2 side and provided with a right side device main body attachment portion 42, a second right side plate member 41b located on the Z1 side and provided with the right side device main body attachment portion 42, and a third right side plate member 41c that is shorter in the Y direction than the first right side plate member 41a and the second right side plate member 41b and connects the first right side plate member 41a and the second right side plate member 41b. This makes the right side cover member 4 have a U-shape. The length L3 of the first right side plate member 41a in the Z direction is greater than the length L4 of the second right side plate member 41b in the Z direction. In the second right side plate member 41b, the length (thickness) t2 in the X direction at the end on the Z1 side is smaller than the length (thickness) t1 in the X direction at the end on the Z2 side. The first right side plate member 41a, the second right side plate member 41b, and the third right side plate member 41c are examples of the "plate member" set forth in the claims.

[0054] Like the top cover member 2 shown in Fig. 9, the right side device body attachment part 42 is configured to attach the right side cover body part 41 to the power conversion device body 1. The right side device body attachment part 42 has a fitting part 42a that fits into the beam part 11a of the ventilation hole 11 by elastic deformation. The fitting part 42a is, for example, a snap fit, and is inserted into the ventilation hole 11 while being pressed inward, and is elastically deformed outward to fit into the beam part 11a of the ventilation hole 11. The fitting part 42a is provided on the first right side plate member 41a.

[0055] The right side device body attachment part 42 has a claw part 42b that does not elastically deform. The claw part 42b is hooked on the ventilation hole 11 to attach the right side cover body part 41 to the power conversion device body 1. The claw part 42b is provided on the second right side plate member 41b. The Z1 side of the surface opposite to the surface on which the claw part 42b of the second right side plate member 41b is provided is thinner than the Z2 side. The claw part 42b is provided, for example, when it interferes with a component arranged inside the power conversion device body 1 and when the space for fitting the fitting part 42a is small, or when it interferes with a component arranged inside the power conversion device body 1 and the space for fitting the fitting part 42a is small.

[0056] 1, the second upper plate member 21b of the upper cover member 2 covers a thin portion of the second right side plate member 41b of the right side cover member 4. This makes it possible to reinforce the fixation by the claw portion 42b.

[0057] As shown in FIG. 8, the right side device body attachment portion 42 is disposed on the first right side plate member 41a and the second right side plate member 41b at a predetermined interval. The right side device body attachment portion 42 is disposed in correspondence with the position of the ventilation hole 11. In the example shown in FIG. 8, the aspect ratio (ratio of vertical length to horizontal length) of the right side cover member 4, which is the sum of the first right side plate member 41a, the second right side plate member 41b, and the third right side plate member 41c, is large and is long in the Z direction, so that the right side device body attachment portion 42 is provided at two locations, near the end portion on the Z1 side of the second right side plate member 41b and near the end portion on the Z2 side of the first right side plate member 41a. The number of the right side device body attachment portion 42 may be one or more. In addition, a right side device main body mounting portion 42 may be additionally provided in at least one location near the Z2 side end of the second right side plate member 41b, near the Z1 side end of the first right side plate member 41a, and the third right side plate member 41c.

[0058] A plurality of right side cushioning parts 43 are provided on the right side cover main body 41 at a predetermined interval from each other. Specifically, the right side cushioning parts 43 are arranged near the corners 4a of the first right side plate member 41a and the second right side plate member 41b. Here, the vicinity of the corners 4a is a broad concept including not only a position overlapping the corners 4a but also a position away from the corners 4a and closer to the corners 4a than the center. The corners 4a refer to the portions where two sides of the first right side plate member 41a and the second right side plate member 41b intersect. A plurality of right side cushioning parts 43 are provided. The right side cushioning parts 43 are arranged at two positions at the corners 4a located on the Y1 side. The right side cushioning parts 43 are arranged at two positions adjacent to the wall portion forming the recess on the Y2 side. The right side cushioning parts 43 are made of the same material as the right side cover main body 41.

[0059] The right side cushioning part 43 is disposed between the right side cover main body part 41 and the power conversion device main body 1, and comes into contact with the power conversion device main body 1. The right side cushioning part 43 brings the right side cover main body part 41 into contact with the power conversion device main body 1. A gap is formed between the power conversion device main body 1 and a part of the surface of the right side cover main body part 41 facing the power conversion device main body 1 other than the part where the right side device main body mounting part 42 and the right side cushioning part 43 are provided. Therefore, the right side cover main body part 41 can bend toward the gap, and can cushion external impacts.

[0060] The right side cushioning part 43 cushions external shocks. Specifically, the right side cushioning part 43 has a protruding part 43a that protrudes from the right side cover main body part 41 toward the power conversion device main body 1 and cushions external shocks. In a cross section cut along the extension direction (X direction) of the right side cover main body part 41, the cross-sectional area of ​​the protruding part 43a on the power conversion device main body 1 side (Z2 side) is smaller than the cross-sectional area of ​​the protruding part 43a on the top cover main body part 21 side (Z2 side).

[0061] The protrusion 43a has a tapered shape tapering from the right side cover main body 41 toward the power conversion device main body 1, and is configured to cushion external impacts by plastically deforming (crushing) the tapered tip. FIG. 8 shows an example in which the protrusion 23a has a truncated cone shape. The protrusion 43a is made of the same resin containing polyphenylene oxide (noryl resin) as the power conversion device main body 1 and the right side cover main body 41. The protrusion 43a is also formed integrally with the right side cover main body 41.

[0062] The right side cover member 4 (right side cover main body 41) comes into contact with the power conversion device main body 1 via the protrusion 43a. Therefore, the right side cover main body 41, on which the protrusion 43a is not formed, and the power conversion device main body 1 are disposed spaced apart from each other. Also, since the left side cover main body 31, on which the protrusion 43a is not formed, and the power conversion device main body 1 are spaced apart, when an external impact is received, the right side cover main body 41, on which the protrusion 43a is not formed, bends. This cushions the external impact.

[0063] The groove 44 is provided to suppress warping of the right side cover member 4. The groove 44 is continuously formed so as to extend in the Z direction. As shown in Fig. 8, the groove 44 is not provided to both end faces of the right side cover member 4 in the Z direction.

[0064] (Effects of the first embodiment) In the first embodiment, the following effects can be obtained.

[0065] In the first embodiment, the power conversion device 100 includes a power conversion device main body 1 provided with a plurality of ventilation holes 11, and cover members (top cover member 2, left side cover member 3, right side cover member 4) attached to the power conversion device main body 1 and covering the ventilation holes 11. The cover members (top cover member 2, left side cover member 3, right side cover member 4) include cover main body parts (top cover main body part 21, left side cover main body part 31, right side cover main body part 41) and cover main body parts (top cover main body part 21, left side cover main body part 31, right side cover main body part 41). The cover includes a device body mounting portion (top device body mounting portion 22, left device body mounting portion 32, right device body mounting portion 42) that mounts the cover body portion (top cover body portion 21, left side cover body portion 31, right side cover body portion 41) to the power conversion device body 1, and a buffer portion (top buffer portion 23, left side buffer portion 33, right side buffer portion 43) that is disposed between the cover body portion (top cover body portion 21, left side cover body portion 31, right side cover body portion 41) and the power conversion device body 1. As a result, the buffer portions (top buffer portion 23, left side buffer portion 33, right side buffer portion 43) buffer external impacts, thereby protecting the power conversion device body 1 from external impacts.

[0066] In the first embodiment, as described above, the buffer parts (upper buffer part 23, left side buffer part 33, right side buffer part 43) have protrusions (protrusions 23a, 33a, 43a) that protrude toward the power converter body 1. As a result, since the buffer parts (upper buffer part 23, left side buffer part 33, right side buffer part 43) have protrusions, a gap can be easily formed between the cover body part (upper cover body part 21, left side cover body part 31, right side cover body part 41) and the power converter body 1, and the formed gap and the buffer parts (upper buffer part 23, left side buffer part 33, right side buffer part 43) can further reduce external impacts. As a result, external impacts applied to the power converter body 1 are further reduced, and the power converter body 1 can be effectively protected against external impacts.

[0067] In the first embodiment, as described above, the protrusions (protrusions 23a, 33a, 43a) are integrally formed with the cover main body (top cover main body 21, left side cover main body 31, right side cover main body 41). This makes it possible to suppress an increase in the number of parts because it is not necessary to separately provide the cover main body (top cover main body 21, left side cover main body 31, right side cover main body 41) and the protrusions (protrusions 23a, 33a, 43a), unlike when the cover main body (top cover main body 21, left side cover main body 31, right side cover main body 41) and the protrusions (protrusions 23a, 33a, 43a) are separate bodies.

[0068] In the first embodiment, as described above, in a cross section cut along the extending direction of the cover main body portion (top cover main body portion 21, left side cover main body portion 31, right side cover main body portion 41), the cross-sectional area of ​​the protrusion portion (protrusion portion 23a, protrusion portion 33a, protrusion portion 43a) on the power conversion device main body 1 side is smaller than the cross-sectional area of ​​the protrusion portion (protrusion portion 23a, protrusion portion 33a, protrusion portion 43a) on the cover main body portion (top cover main body portion 21, left side cover main body portion 31, right side cover main body portion 41). As a result, since the cross-sectional area of ​​the protrusion portion (protrusion portion 23a, protrusion portion 33a, protrusion portion 43a) on the power conversion device main body 1 side is small, the protrusion portion (protrusion portion 23a, protrusion portion 33a, protrusion portion 43a) can be formed small toward the power conversion device main body 1, and the tip portion of the protrusion portion (protrusion portion 23a, protrusion portion 33a, protrusion portion 43a) can be easily deformed by an external impact. As a result, the tip ends of the protrusions (protrusions 23a, 33a, 43a) are deformed, thereby absorbing the energy of external impact, thereby more effectively protecting the power conversion device main body 1 against external impact.

[0069] In the first embodiment, as described above, the protrusions (protrusions 23a, 33a, and 43a) are configured to cushion an external impact by plastically deforming. As a result, the tips of the protrusions (protrusions 23a, 33a, and 43a) are plastically deformed upon receiving an external impact, and the energy of the external impact can be easily absorbed.

[0070] In the first embodiment, as described above, a plurality of the buffer sections (top buffer section 23, left buffer section 33, right buffer section 43) are provided at predetermined intervals on the cover main body section (top cover main body section 21, left cover main body section 31, right cover main body section 41). As a result, by arranging a plurality of the buffer sections (top buffer section 23, left buffer section 33, right buffer section 43), it is possible to disperse an external impact, and therefore it is possible to effectively protect both the cover members (top cover member 2, left cover member 3, right cover member 4) and the power conversion device main body 1 against an external impact. In addition, by arranging the buffer sections (top buffer section 23, left side buffer section 33, right side buffer section 43) at a predetermined interval, the buffer sections (top buffer section 23, left side buffer section 33, right side buffer section 43) can support the cover main body sections (top cover main body section 21, left side cover main body section 31, right side cover main body section 41) so that the cover members (top cover member 2, left side cover member 3, right side cover member 4) do not tilt relative to the power conversion device main body 1 when the cover members (top cover member 2, left side cover member 3, right side cover member 4) are attached to the power conversion device main body 1.

[0071] Furthermore, in the first embodiment, as described above, the cover main body portion (top cover main body portion 21, left side cover main body portion 31, right side cover main body portion 41) is formed from plate-shaped members (first top plate member 21a, second top plate member 21b, left side plate member 31a, first right side plate member 41a, second right side plate member 41b, third right side plate member 41c), and the buffer portions (top buffer portion 23, left side buffer portion 33, right side buffer portion 43) are positioned near the corners of the plate-shaped members (first top plate member 21a, second top plate member 21b, left side plate member 31a, first right side plate member 41a, second right side plate member 41b, third right side plate member 41c). As a result, since the buffer sections (top surface buffer section 23, left surface buffer section 33, right surface buffer section 43) are positioned near the corners of the plate-shaped members (first top surface plate member 21a, second top surface plate member 21b, left surface plate member 31a, first right surface plate member 41a, second right surface plate member 41b, third right surface plate member 41c), the areas near the centers of the plate-shaped members (first top surface plate member 21a, second top surface plate member 21b, left surface plate member 31a, first right surface plate member 41a, second right surface plate member 41b, third right surface plate member 41c) are more likely to flex. When an external impact is applied near the center of the plate-shaped members (first upper surface plate member 21a, second upper surface plate member 21b, left side plate member 31a, first right side plate member 41a, second right side plate member 41b, third right side plate member 41c), the vicinity of the center of the plate-shaped members (first upper surface plate member 21a, second upper surface plate member 21b, left side plate member 31a, first right side plate member 41a, second right side plate member 41b, third right side plate member 41c) bends, thereby cushioning the external impact.

[0072] In the first embodiment, as described above, the buffer sections (upper buffer section 23, left buffer section 33, right buffer section 43) are arranged near the corners of the plate members (first upper plate member 21a, second upper plate member 21b, left plate member 31a, first right plate member 41a, second right plate member 41b, third right plate member 41c) as well as near the centers. This makes it easier to buffer the impact when an external impact is applied near the centers, as the plate members (first upper plate member 21a, second upper plate member 21b, left plate member 31a, first right plate member 41a, second right plate member 41b, third right plate member 41c) bend near the centers, and the buffer sections (upper buffer section 23, left buffer section 33, right buffer section 43) buffer the impact.

[0073] In the first embodiment, as described above, the device main body mounting parts (top device main body mounting part 22, left side device main body mounting part 32, right side device main body mounting part 42) have fitting parts (fitting part 22a, fitting part 32a, fitting part 42a) that fit into the ventilation hole 11 by elastic deformation. As a result, the fitting parts (fitting part 22a, fitting part 32a, fitting part 42a) are inserted into the ventilation hole 11 in an elastically deformed state, and the fitting parts (fitting part 22a, fitting part 32a, fitting part 42a) are returned to their original shapes, so that the cover members (top cover member 2, left side cover member 3, right side cover member 4) can be attached to the ventilation hole 11, and therefore the cover members (top cover member 2, left side cover member 3, right side cover member 4) can be easily attached to the power conversion device main body 1. Moreover, by elastically deforming the fitting portions (fitting portion 22a, fitting portion 32a, fitting portion 42a), the cover members (top cover member 2, left side cover member 3, right side cover member 4) can be removed from the ventilation hole 11, so that the cover members (top cover member 2, left side cover member 3, right side cover member 4) can be easily removed from the power conversion device main body 1. Moreover, since the cover members (top cover member 2, left side cover member 3, right side cover member 4) can be attached using the ventilation hole 11, there is no need to provide a dedicated attachment portion, and the structure can be simplified accordingly.

[0074] Furthermore, in the first embodiment, as described above, the cover main body parts (top cover main body part 21, left side cover main body part 31, right side cover main body part 41) are formed from plate-shaped members (first top plate member 21a, second top plate member 21b, left side plate member 31a, first right side plate member 41a, second right side plate member 41b, third right side plate member 41c), and the device main body mounting parts (top device main body mounting part 22, left side device main body mounting part 32, right side device main body mounting part 42) are provided in multiple parts and are arranged on the plate-shaped members at a predetermined interval. As a result, by arranging the device main body mounting parts (top device main body mounting part 22, left side device main body mounting part 32, right side device main body mounting part 42) at a predetermined distance, the cover members (top cover member 2, left side cover member 3, right side cover member 4) can be attached to the power conversion device main body 1 by the device main body mounting parts (top device main body mounting part 22, left side device main body mounting part 32, right side device main body mounting part 42) so that the cover members (top cover member 2, left side cover member 3, right side cover member 4) are not tilted relative to the power conversion device main body 1.

[0075] In the first embodiment, as described above, the vent hole 11 is provided on each of the top and both sides of the power conversion device main body 1, and the cover members include a top cover member 2 that covers the vent hole 11 provided on the top surface of the power conversion device main body 1, a right side cover member 4 that covers the vent hole 11 provided on the right side of the power conversion device main body 1, and a left side cover member 3 that covers the vent hole 11 provided on the left side of the power conversion device main body 1, and the top cover member 2, the left side cover member 3, and the right side cover member 4 are each provided separately and have deformable buffer parts (top buffer part 23, left side buffer part 33, right side buffer part 43) that buffer shocks from the outside. This makes it unnecessary to prepare a cover member for each power conversion device 100 having a different external shape, unlike the case where the top cover member 2, the left side cover member 3, and the right side cover member 4 are integrally formed. In addition, since the top cover member 2, left side cover member 3, and right side cover member 4 each have a cushioning section (top cushioning section 23, left side cushioning section 33, right side cushioning section 43), external impacts are cushioned, and the top and both side surfaces of the power conversion device main body 1, the top cover member 2, the left side cover member 3, and the right side cover member 4 can be protected from external impacts.

[0076] Furthermore, in the first embodiment, as described above, the top cover member 2 is formed in an L-shape and configured to cover a portion of the right side cover member 4 or the left side cover member 3. This allows the top cover member 2 to press and fix the right side cover member 4 or the left side cover member 3, so that the right side cover member 4 or the left side cover member 3 can be fixed to the power conversion device 100 more firmly.

[0077] In the first embodiment, as described above, the right side cover main body 41 is made of resin and has a groove 44 for suppressing warping. As a result, the groove 44 suppresses warping of the cover main bodies (top cover main body 21, left side cover main body 31, right side cover main body 41) during resin formation, making it possible to make the cover members (top cover member 2, left side cover member 3, right side cover member 4) less likely to fall off from the power conversion device main body 1.

[0078] [Second embodiment] Next, the configuration of a right side cover member 4 according to a second embodiment of the present invention will be described with reference to Fig. 10. In a power conversion device 200 of the second embodiment, the right side cover member 4 is configured to improve the connection strength of the connection portion 1c of the power conversion device main body 1. Note that the same configurations as those in the first embodiment are given the same reference numerals as those in the first embodiment, and descriptions thereof will be omitted.

[0079] 10, in the power converter 200 of the second embodiment, the right side cover member 4 is attached to the right side of the power converter main body 1 so as to cover the connection portion 1c between the first housing portion 1a and the second housing portion 1b. This makes it possible to prevent the right side cover member 4 from releasing the connection state of the connection portion 1c. In addition, since the right side cover member 4 is covered and fixed by the top cover member 2, the connection of the connection portion 1c can be made stronger.

[0080] The other configurations of the second embodiment are similar to those of the first embodiment.

[0081] (Effects of the second embodiment) In the second embodiment, as described above, the power conversion device 200 includes a power conversion device main body 1 provided with a plurality of ventilation holes 11, and cover members (top cover member 2, left side cover member 3, right side cover member 4) attached to the power conversion device main body 1 and covering the ventilation holes 11. The cover members (top cover member 2, left side cover member 3, right side cover member 4) include cover main body parts (top cover main body part 21, left side cover main body part 31, right side cover main body part 41) and The cover body includes an apparatus body mounting portion (upper apparatus body mounting portion 22, left apparatus body mounting portion 32, right apparatus body mounting portion 42) that mounts the bar body portion (upper cover body portion 21, left side cover body portion 31, right side cover body portion 41) to the power conversion apparatus body 1, and a buffer portion (upper buffer portion 23, left side buffer portion 33, right side buffer portion 43) that is disposed between the cover body portion (upper cover body portion 21, left side cover body portion 31, right side cover body portion 41) and the power conversion apparatus body 1. As a result, the buffer portions (upper buffer portion 23, left side buffer portion 33, right side buffer portion 43) buffer external impacts, thereby protecting the power conversion apparatus body 1 from external impacts.

[0082] In the second embodiment, as described above, the power conversion device main body 1 includes a first housing part 1a capable of accommodating a power conversion module and having an air vent 11, and a second housing part 1b connected to the first housing part 1a, and the right side cover member 4 including the right side cushioning part 43 is attached to the power conversion device main body 1 so as to cover the connection part 1c between the first housing part 1a and the second housing part 1b. As a result, by covering the connection part 1c between the first housing part 1a and the second housing part 1b with the right side cover member 4, the connection part 1c between the first housing part 1a and the second housing part 1b is pressed against the power conversion device main body 1 by the right side cover member 4, and therefore, it is possible to prevent the connection state from being released.

[0083] Other effects of the second embodiment are similar to those of the first embodiment.

[0084] [Variations] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not by the description of the embodiments above, and further includes all modifications (variations) within the meaning and scope of the claims.

[0085] For example, in the above first and second embodiments, the top cover member 2, the left side cover member 3, and the right side cover member 4 are separate bodies, but the present invention is not limited to this. In the present invention, the top cover member 2, the left side cover member 3, and the right side cover member 4 may be integrated. In this case, buffer parts are provided on the top surface and both side surfaces of the cover members facing the power conversion device main body 1.

[0086] In the above first and second embodiments, the power converter main body 1, the top cover member 2, the left side cover member 3, and the right side cover member 4 are made of resin, but the present invention is not limited to this. In the present invention, the power converter main body 1, the top cover member 2, the left side cover member 3, and the right side cover member 4 may be made of a material other than resin, for example, metal.

[0087] In the above first and second embodiments, the power conversion device main body 1, the top cover member 2, the left side cover member 3, and the right side cover member 4 are made of the same material, but the present invention is not limited to this. In the present invention, the power conversion device main body 1, the top cover member 2, the left side cover member 3, and the right side cover member 4 may be made of different materials. In this case, the power conversion device main body 1 is made of a material that is harder than the materials that make up the top cover member 2, the left side cover member 3, and the right side cover member 4.

[0088] In the above first and second embodiments, an example in which the buffer part is formed integrally with the cover main body part has been shown, but the present invention is not limited to this. In the present invention, the buffer part may be formed separately from the cover main body part. In this case, the method of fixing the buffer part to the cover main body part is not particularly limited. In addition, an example in which the buffer part is formed integrally with the cover main body part has been shown, but the buffer part may be formed integrally with the power conversion device main body, or may be formed integrally with both the cover main body part and the power conversion device main body.

[0089] In the above first and second embodiments, the buffer portion (protrusion) and the cover body are made of the same material, but the present invention is not limited to this. In the present invention, the buffer portion (protrusion) and the cover body may be made of different materials. In this case, the buffer portion (protrusion) may be made of a material that elastically deforms, or may be made of a material that plastically deforms.

[0090] In the above first and second embodiments, the buffer portion (protrusion) and the power conversion device main body 1 are made of the same material, but the present invention is not limited to this. In the present invention, the buffer portion (protrusion) and the power conversion device main body 1 may be made of different materials. In this case, the buffer portion (protrusion) may be made of a material softer than the power conversion device main body 1.

[0091] In the above first and second embodiments, the buffer portion (protrusion) is disposed both near the corner and near the center of the plate-like member, but the present invention is not limited to this. In the present invention, the buffer portion (protrusion) may be disposed only near either the corner or the center of the plate-like member.

[0092] In the above first and second embodiments, the fitting portion 22a of the top device body mounting portion 22 of the top cover member 2, the fitting portion 32a of the left device body mounting portion 32 of the left side cover member 3, and the fitting portion 42a of the right device body mounting portion 42 of the right side cover member 4 are snap-fitted, but the present invention is not limited to this. In the present invention, a fitting method other than snap-fitting, for example, bolts and nuts, may be used. Also, the top cover member 2, the left side cover member 3, and the right side cover member 4 may be attached to the power conversion device body 1 by a method other than fitting, for example, screw fastening.

[0093] In the above first and second embodiments, the protrusion is shaped like a truncated cone, but the present invention is not limited to this. In the present invention, the shape of the protrusion is not limited to a truncated cone, and may be a cylindrical shape or a conical shape. In other words, the tip of the protrusion may be flat, pointed, or arc-shaped. Furthermore, the base of the protrusion (the portion in contact with the cover body) may be circular or polygonal. Furthermore, the protrusion may have a step between the cover body side and the tip side.

[0094] In the above first and second embodiments, an example has been shown in which the groove portion 44 is not provided to both end faces in the Z direction, but the present invention is not limited to this. In the present invention, the groove portion 44 may be provided to both end faces in the Z direction. In addition, the groove portion 44 is not limited to one continuous groove portion 44, and may be composed of a plurality of discontinuously formed groove portions 44.

[0095] In the above first and second embodiments, the groove portion 44 is provided in the right side cover member 4, but the present invention is not limited to this. In the present invention, the groove portion 44 may be provided in the top cover member 2 or the left side cover member 3.

[0096] In the first and second embodiments, the length in the extension direction (X direction) of the first upper surface plate member 21a is greater than the length in the extension direction (Z direction) of the second upper surface plate member 21b when viewed from the front, but the present invention is not limited to this. In the present invention, the length in the extension direction (X direction) of the first upper surface plate member 21a may be less than or the same as the length in the extension direction (Z direction) of the second upper surface plate member 21b when viewed from the front.

[0097] In the above first and second embodiments, an example has been shown in which a part of the top cover member 2 covers a part of the right side cover member 4, but the present invention is not limited to this. In the present invention, a part of the top cover member 2 may cover a part of the left side cover member 3 instead of the right side cover member 4, or may cover both the left side cover member 3 and the right side cover member 4. In addition, the top cover member 2 does not have to cover either the left side cover member 3 or the right side cover member 4.

[0098] In the above first and second embodiments, the first and second upper surface plate members 21a and 21b are rectangular, but the present invention is not limited to this. In the present invention, the first and second upper surface plate members 21a and 21b may be quadrangular, including square, or polygonal, other than rectangular.

[0099] In the above first and second embodiments, the left side plate member 31a is rectangular with a large aspect ratio, but the present invention is not limited to this. In the present invention, the left side plate member 31a may have a small aspect ratio. In addition, the left side plate member 31a may be quadrangular, including a square, other than a rectangular shape, or may be polygonal other than a quadrangular shape.

[0100] In the above first and second embodiments, an example has been shown in which the right side device body mounting portion 42 of the right side cover member 4 has the claw portion 42b, but the present invention is not limited to this. In the present invention, the right side device body mounting portion 42 does not have to have the claw portion 42b. Also, the top device body mounting portion 22 of the top cover member 2 and the left side device body mounting portion 32 of the left side cover member 3 may have the claw portion 42b.

[0101] In the above first and second embodiments, the length of the first right side plate member 41a in the Z direction is greater than the length of the second right side plate member 41b in the Z direction, but the present invention is not limited to this. In the present invention, the length of the first right side plate member 41a in the Z direction may be the same as or smaller than the length of the second right side plate member 41b in the Z direction.

[0102] In the above first and second embodiments, the right side cover member 4 has a U-shape, but the present invention is not limited to this. In the present invention, the right side cover member 4 may have a quadrangular shape including a rectangular shape, or may have a polygonal shape other than a quadrangular shape.

[0103] In the second embodiment, the right side cover member 4 is attached to the power conversion device body 1 so as to cover the connection portion 1c, but the present invention is not limited to this. In the present invention, the left side cover member 3 may be attached to the power conversion device body 1 so as to cover the connection portion 1c. [Explanation of symbols]

[0104] 1 Power conversion device body 1a First housing part 1b Second housing part 1c Connection 2 Top cover part (cover part) 3 Left side cover part (cover part) 4 Right side cover part (cover part) 11 Ventilation hole 21 Top cover body (cover body) 21a: First upper plate member (plate member) 21b Second upper surface plate member (plate member) 22 Upper device body mounting part (device body mounting part) 22a, 32a, 42a mating part 23 Top buffer section (buffer section) 23a, 33a, 43a protrusion 31 Left side cover body (cover body) 31a Left side plate member (plate member) 32 Left side device body mounting part (device body mounting part) 33 Left side buffer section (buffer section) 41 Right side cover body (cover body) 41a: First right side plate member (plate member) 41b Second right side plate member (plate member) 41c Third right side plate member (plate member) 42 Right side device body mounting part (device body mounting part) 42b Claw portion (device body mounting portion) 43 Right side buffer section (buffer section) 44 Groove 100, 200 Power converter

Claims

1. a power conversion device body provided with a plurality of ventilation holes; a cover member attached to the power conversion device body and covering the ventilation hole, A power conversion device, wherein the cover member includes a cover main body portion, a device main body mounting portion that mounts the cover main body portion to the power conversion device main body, and a buffer portion arranged between the cover main body portion and the power conversion device main body.

2. The power converter according to claim 1 , wherein the buffer portion has a protrusion that protrudes from the cover body portion toward the power converter body.

3. The power conversion device according to claim 2 , wherein the protrusion is formed integrally with the cover body.

4. The power conversion device according to claim 2 , wherein in a cross section cut along the extension direction of the cover main body portion, a cross-sectional area of ​​the protrusion on the power conversion device main body side is smaller than a cross-sectional area of ​​the protrusion on the cover main body side.

5. The power conversion device according to claim 2 , wherein the protrusion is configured to absorb an external shock by plastic deformation.

6. The power conversion device according to claim 1 , wherein the buffer portion comprises a plurality of buffer portions provided on the cover body portion at predetermined intervals from each other.

7. The cover body is formed of a plate-shaped member, The power conversion device according to claim 1 , wherein the buffer portion is disposed near a corner of the plate-like member.

8. The power conversion device according to claim 7 , wherein the buffer portions are arranged near a center of the plate-like member in addition to near corners of the plate-like member.

9. The power conversion device according to claim 1 , wherein the device body mounting portion has a fitting portion that fits into the ventilation hole by elastic deformation.

10. The cover body is formed of a plate-shaped member, The power conversion device according to claim 1 , wherein a plurality of the device body mounting portions are provided and are arranged on the plate-like member at predetermined intervals.

11. The vent holes are provided on a top surface and both side surfaces of the power conversion device body, The power conversion device of claim 1, wherein the cover members include a top cover member covering the ventilation hole provided on the top surface of the power conversion device main body, a right side cover member covering the ventilation hole provided on the right side of the power conversion device main body, and a left side cover member covering the ventilation hole provided on the left side of the power conversion device main body, and the top cover member, the left side cover member, and the right side cover member are each provided separately.

12. The power conversion device according to claim 11 , wherein the top cover member is formed in an L-shape and configured to cover a portion of the right side cover member or the left side cover member.

13. The power conversion device according to claim 1 , wherein the cover body is made of resin and has a groove for suppressing warping.

14. the power conversion device main body includes a first housing portion capable of accommodating a power conversion module and having the vent hole, and a second housing portion connected to the first housing portion; The power conversion device according to claim 1 , wherein the cover member including the buffer portion is attached to the power conversion device body so as to cover a connection portion between the first housing portion and the second housing portion.

Images