JP6817495B1 - Power converter - Google Patents

Abstract

The power conversion device (1) includes a first housing (2) having a first flat surface portion (21) and a first side surface portion (22) on which a first penetration portion (23) is formed, and a box portion ( Obtained by a second housing (6) having a 61) and an outer peripheral portion (62), a power converter (8) located inside the first housing (2), and a power converter (8). It has a function of suppressing noise in electric power and has a reactor (9) located inside the box portion (61) of the second housing (6). The outer peripheral portion (62) of the second housing (6) is provided outside the second side surface portion (64) of the box portion (61). In the second housing (6), the second flat surface portion (63) is located outside the first housing (2) and the outer peripheral portion (62) is located inside the first housing (2). , Is located in the first penetrating portion (23) of the first housing (2).

Description

The present invention relates to, for example, a power converter used to charge a storage battery.

Conventionally, in a power conditioner that converts DC power obtained by a solar cell into AC power, a case for storing a reactor is screwed from the outside of the product housing and formed at the place where the case is placed. A technique for inserting a reactor from the inside of the housing into the penetrating portion of the housing has been proposed (see, for example, Patent Document 1).

JP-A-2015-70254

In the conventional technique, the case is fixed to the housing from the outside of the housing of the product, and then the reactor is inserted into the penetrating portion of the housing from the inside of the housing. Therefore, when manufacturing the power conditioner, It is necessary to replace the inside and the outside of the housing. Swapping the inside and outside of the housing takes time and effort, which reduces productivity. There is a demand for a technique capable of manufacturing a power conversion device without reducing productivity.

The present invention has been made in view of the above, and an object of the present invention is to obtain a power conversion device that can be manufactured without reducing productivity.

In order to solve the above-mentioned problems and achieve the object, the present invention has a first housing having a first plane portion and a first side surface portion on which a first penetration portion is formed, and a box portion and an outer peripheral portion. It has at least one of a function of converting AC power into DC power and a function of converting DC power into AC power, and is located inside the first housing. It has a power converter and a reactor that has a function of suppressing noise in the power obtained by the power converter and is located inside the box portion of the second housing. A first opening is formed in the first housing, and the first flat surface portion and the first opening are opposed to each other. The box portion of the second housing includes a second flat surface portion and a second side surface portion, and a second opening portion is formed in the box portion, and the second flat surface portion and the second opening portion face each other. The outer peripheral portion of the second housing is provided outside the second side surface portion. The second housing is located in the first penetrating portion of the first housing in a state where the second flat surface portion is located outside the first housing and the outer peripheral portion is located inside the first housing. .. The present invention further has a packing that is located at the edge portion surrounding the first penetrating portion of the first housing and fills the space between the first flat surface portion of the first housing and the outer peripheral portion of the second housing. The edge portion is recessed from the inside of the first housing toward the outside of the first housing. The packing is located inside the first housing and at a portion recessed toward the outside of the first housing at the edge. According to the present invention, the second housing is screwed and the packing is compressed so that the outer peripheral portion of the second housing and the outer side of the packing provided on the edge of the first housing are contacted and fixed. The first screw tightening portion is provided in the first housing. In the present invention, a first mounting plate to which a reactor is attached and separated from the second plane portion of the second housing from the reactor, and a plurality of first mounting plates for fixing the first mounting plate to the outer peripheral portion of the second housing. It also has screws. A plurality of first screws used for fixing the first mounting plate are inserted into a plurality of bag nuts through screw holes provided on the outer peripheral portion of the second housing, and are integrally screwed to the first housing.

The present invention has the effect that the power conversion device can be manufactured without lowering the productivity.

FIG. 1 schematically shows a configuration of a power conversion device according to an embodiment. FIG. 2 schematically shows a configuration of a power conversion device according to an embodiment. FIG. 3 schematically shows a configuration of a power conversion device according to an embodiment. FIG. 1 for explaining the effect obtained by the power conversion device according to the embodiment. FIG. 2 for explaining the effect obtained by the power conversion device according to the embodiment. FIG. 3 for explaining the effect obtained by the power conversion device according to the embodiment.

Hereinafter, the power conversion device according to the embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

Embodiment.
First, the configuration of the power conversion device 1 according to the embodiment will be described. FIG. 1 is a diagram schematically showing a configuration of a power conversion device 1 according to an embodiment. Specifically, FIG. 1 is a perspective view schematically showing a state in which a plurality of components of the power conversion device 1 are disassembled when viewed from the front side. FIG. 1 does not show some components and parts of the power converter 1. The power conversion device 1 is used, for example, to charge a storage battery.

As shown in FIG. 1, the power conversion device 1 has a first housing 2 having a first plane portion 21 and a first side surface portion 22. The first housing 2 is made of, for example, iron. A first penetrating portion 23 is formed on the first flat surface portion 21. A first opening 24 is formed in the first housing 2, and the first flat surface portion 21 and the first opening 24 face each other. Most of the first side surface portion 22 is located on the front side of the first flat surface portion 21. That is, most of the first side surface portion 22 is located closer to the first opening 24 than the first flat surface portion 21.

The power conversion device 1 further includes a heat sink 3 located on the back side of the first flat surface portion 21 of the first housing 2, and a shield member 4 that fills the space between the first flat surface portion 21 and the heat sink 3. .. The back side is the outside of the first housing 2. The power conversion device 1 further includes an outer cover 5 that covers the outer side of the first housing 2 and the heat sink 3. The outer cover 5 constitutes a cooling duct together with the first housing 2 and, more specifically, the first flat surface portion 21 of the first housing 2.

The power conversion device 1 further includes a second housing 6 located in the first penetrating portion 23 of the first housing 2. The second housing 6 is made of, for example, aluminum. The second housing 6 has a box portion 61 and an outer peripheral portion 62. The box portion 61 has a second flat surface portion 63 and a second side surface portion 64, and the box portion 61 is formed with a second opening 65. The second flat surface portion 63 and the second opening 65 are opposed to each other. The outer peripheral portion 62 is provided outside the second side surface portion 64. The details will be described later with reference to FIG. 2, but in the second housing 6, the second plane portion 63 is located outside the first housing 2 and the outer peripheral portion 62 is located inside the first housing 2. In the state, it is located in the first penetrating portion 23 of the first housing 2.

The power conversion device 1 includes a packing 7 that fills the space between the first flat surface portion 21 of the first housing 2 and the outer peripheral portion 62 of the second housing 6, and a power conversion located inside the first housing 2. It further has a vessel 8. The power converter 8 has at least one of a function of converting AC power into DC power and a function of converting DC power into AC power. For example, the power converter 8 has a function of converting AC power supplied from the outside of the power converter 1 into DC power. The power converter 1 further includes a reactor 9 having a function of suppressing noise in the power obtained by the power converter 8. For example, the reactor 9 suppresses the harmonic current in the DC power obtained by the power converter 8. The reactor 9 is located inside the box portion 61 of the second housing 6.

The power converter 1 further includes a first mounting plate 10 to which the reactor 9 is mounted. The first mounting plate 10 is separated from the second flat surface portion 63 of the second housing 6 by the reactor 9. The power conversion device 1 further includes a plurality of first screws 11 for fixing the first mounting plate 10 to the outer peripheral portion 62 of the second housing 6. The power conversion device 1 has a cover that covers the front side of the power conversion device 1. The cover is not shown in the drawing.

FIG. 2 is a second diagram schematically showing the configuration of the power conversion device 1 according to the embodiment. Specifically, FIG. 2 is a cross-sectional view showing the configuration of the power conversion device 1 in one plane including the second housing 6 and the power converter 8. In FIG. 2, some components are not hatched. FIG. 2 does not show some components of the power converter 1.

As shown in FIG. 2, in the second housing 6, the first housing 6 has a second flat surface portion 63 located outside the first housing 2 and an outer peripheral portion 62 located inside the first housing 2. It is located at the first penetrating portion 23 of the body 2.

The edge portion 25 surrounding the first penetrating portion 23 of the first housing 2 is the first from the inside of the first housing 2 when viewed from the inside of the first housing 2 to the outside of the first housing 2. 1 It is recessed toward the outside of the housing 2. The packing 7 is located at a portion inside the first housing 2 and recessed toward the outside of the first housing 2 at the edge portion 25. An intake window 51 is provided on the side of the first end of the outer cover 5, and an exhaust window 52 is provided on the side of the second end of the outer cover 5.

A second penetrating portion 26 is formed on the first flat portion 21 of the first housing 2. The power converter 8 is located inside the first housing 2 with a part of the power converter 8 located in the second penetrating portion 26. The heat sink 3 is located between the outer cover 5 and the first housing 2, and dissipates the heat generated by the power converter 8. Furthermore, the heat sink 3 is in contact with the power converter 8 and dissipates the heat generated by the power converter 8.

The power conversion device 1 further includes a fan 12 located between the outer cover 5 and the first housing 2 on the side of the exhaust window 52 with respect to the heat sink 3.

The power conversion device 1 has a plurality of bag nuts 13 that are outside the first flat surface portion 21 of the first housing 2 and are in contact with the first flat surface portion 21. Each of the plurality of bag nuts 13 corresponds to any one of the plurality of first screws 11, and each of the plurality of first screws 11 corresponds to any one of the plurality of bag nuts 13. Each of the plurality of first screws 11 is inserted into the corresponding bag nut of the plurality of bag nuts 13 via the first mounting plate 10 and the outer peripheral portion 62 of the second housing 6, and is housed in the bag nut. Be done. As a result, the plurality of first screws 11, together with the plurality of bag nuts 13, bring the first mounting plate 10 to which the reactor 9 is mounted and the outer peripheral portion 62 into close contact with each other, and the first flat portion 21 of the first housing 2 It is fixed to.

The power converter 1 includes a second mounting plate 14 to which the power converter 8 is mounted, and a plurality of second screws 15 for fixing the second mounting plate 14 to the first flat surface portion 21 of the first housing 2. And further. The power conversion device 1 further includes a substrate 16 located inside the first housing 2 and in which a plurality of elements are arranged.

FIG. 3 is a diagram schematically showing the configuration of the power conversion device 1 according to the embodiment. Specifically, FIG. 3 is a cross-sectional view showing the second housing 6 of FIG. 2 and the components located relatively close to the second housing 6. The power conversion device 1 is located inside the box portion 61 of the second housing 6 and is in contact with the box portion 61, and has a heat conductive sheet 17 that conducts heat inside the box portion 61 to the box portion 61. Have more. The heat conductive sheet 17 is also in contact with the reactor 9.

Next, the main part of the manufacturing method of the power conversion device 1 according to the embodiment will be described with reference to FIG. First, the first housing 2 is placed on the workbench with the first opening 24 of the first housing 2 positioned on the front side of the first flat surface portion 21. The workbench is not shown in the drawing. Next, the heat sink 3 is arranged on the outside of the first flat surface portion 21 via the shield member 4, and then the outer cover 5 is arranged on the outside of the first housing 2, and the heat sink is placed on the outside of the first housing 2. 3 and 3 are covered with the outer cover 5.

Next, inside the first housing 2, the packing 7 is arranged at a portion of the edge 25 surrounding the first penetrating portion 23 of the first housing 2 that is recessed toward the outside of the first housing 2. After that, the box portion 61 of the second housing 6 is inserted into the first penetrating portion 23 of the first housing 2 in the direction from the inside of the first housing 2 to the outside of the first housing 2, and the second housing 6 is arranged in the first penetrating portion 23 of the first housing 2. As a result, in the second housing 6, the second flat surface portion 63 is located outside the first housing 2, and the outer peripheral portion 62 is located inside the first housing 2. It is arranged in the first penetrating portion 23.

Next, the reactor 9 is attached to the first mounting plate 10, the reactor 9 is inserted into the box portion 61 from the inside of the first housing 2, and the first mounting plate 10 and the second housing 6 to which the reactor 9 is attached are inserted. The outer peripheral portion 62 is fixed to the first flat portion 21 of the first housing 2 using a plurality of first screws 11. Next, the power converter 8 is arranged inside the first housing 2, and then the front side of the power converter 1 is covered with a cover. As a result, the power conversion device 1 is manufactured. The power converter 8 may be arranged before the packing 7 and the second housing 6 are arranged.

Next, the effects obtained by the power conversion device 1 according to the embodiment will be described with reference to FIGS. 4, 5 and 6. FIG. 4 is a diagram for explaining the effect obtained by the power conversion device 1 according to the embodiment. FIG. 5 is a second diagram for explaining the effect obtained by the power conversion device 1 according to the embodiment. FIG. 6 is a third diagram for explaining the effect obtained by the power conversion device 1 according to the embodiment. Specifically, FIGS. 4, 5 and 6 show a part of the manufacturing method of the power conversion device 1. After arranging the first housing 2 as shown in FIG. 4, as shown in FIG. 5, the box portion 61 of the second housing 6 faces from the inside of the first housing 2 to the outside of the first housing 2. Is inserted into the first penetrating portion 23 of the first housing 2, thereby arranging the second housing 6 in the first penetrating portion 23 of the first housing 2.

When the process of FIG. 5 is completed, the second housing 6 is in a state where the second flat surface portion 63 is located outside the first housing 2 and the outer peripheral portion 62 is located inside the first housing 2. It is located at the first penetration portion 23 of the housing 2. Next, as shown in FIG. 6, the reactor 9 attached to the first mounting plate 10 from the inside of the first housing 2 to the outside of the first housing 2 is attached to the box portion 61 of the second housing 6. insert.

As described above, in the method of manufacturing the power conversion device 1 according to the embodiment, both the direction in which the second housing 6 is inserted and the direction in which the reactor 9 is inserted are from the inside of the first housing 2 to the first housing. It is the same as the outward orientation of the body 2. That is, the method of manufacturing the power conversion device 1 according to the embodiment makes it possible to manufacture the power conversion device 1 without exchanging the inside and the outside of the first housing 2. Therefore, the manufacturing method can improve the productivity of the power conversion device 1 as compared with the conventional case.

Furthermore, in the power conversion device 1 according to the embodiment, in the second housing 6, the second flat surface portion 63 is located outside the first housing 2, and the outer peripheral portion 62 is inside the first housing 2. It is located in the first penetrating portion 23 of the first housing 2 in the state of being located in. That is, the power conversion device 1 can be manufactured without exchanging the inside and the outside of the first housing 2. Therefore, the power conversion device 1 according to the embodiment makes it possible to manufacture the power conversion device 1 without lowering the productivity.

At the time of manufacturing the power conversion device 1, each of the plurality of first screws 11 is inserted into the corresponding bag nut 13 in the direction in which the second housing 6 and the reactor 9 are inserted, and is housed in the bag nut. As a result, the first mounting plate 10 to which the reactor 9 is mounted and the outer peripheral portion 62 of the second housing 6 are brought into close contact with each other. The power conversion device 1 may be arranged outdoors or in a place where water from the outside may enter when it rains, but the first mounting plate 10 and the outer peripheral portion 62 are in close contact with each other. Therefore, the power conversion device 1 can prevent water from entering the inside of the box body 61 of the second housing 6. The water is, for example, rain.

The power conversion device 1 has a packing 7 that fills the space between the first flat surface portion 21 of the first housing 2 and the outer peripheral portion 62 of the second housing 6. Therefore, the power conversion device 1 can prevent water from entering the inside of the cooling duct composed of the first housing 2 and the outer cover 5. The water is, for example, rain.

The power conversion device 1 has a heat conductive sheet 17 located inside the box portion 61 of the second housing 6. Therefore, the power conversion device 1 can conduct the heat generated by the reactor 9 to the second housing 6 and efficiently release the heat to the outside of the first housing 2 via the second housing 6. it can.

The power conversion device 1 has a fan 12 located between the outer cover 5 and the first housing 2 on the side of the exhaust window 52 with respect to the heat sink 3. As the fan 12 rotates, wind enters the inside of the cooling duct composed of the first housing 2 and the outer cover 5 from the intake window 51, and enters the outside of the power conversion device 1 from the exhaust window 52. Get out. As a result, the heat generated by the power converter 8 is discharged to the outside of the power converter 1 via the heat sink 3 and the cooling duct. That is, the power converter 1 can efficiently discharge the heat generated by the power converter 8 to the outside of the power converter 1 by rotating the fan 12.

The configuration shown in the above-described embodiment shows an example of the content of the present invention, can be combined with another known technique, and is one of the configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

1 power converter, 2 first housing, 3 heat sink, 4 shield member, 5 outer cover, 6 second housing, 7 packing, 8 power converter, 9 reactor, 10 first mounting plate, 11 first screw, 12 fan, 13 bag nut, 14 second mounting plate, 15 second screw, 16 substrate, 17 heat conductive sheet, 21 first flat part, 22 first side surface part, 23 first penetration part, 24 first opening, 25 edge part, 26 second penetration part, 51 intake window, 52 exhaust window, 61 box part, 62 outer peripheral part, 63 second flat part, 64 second side surface part, 65 second opening.

Claims (3)

A first housing having a first flat surface portion and a first side surface portion on which a first penetration portion is formed,
A second housing having a box part and an outer peripheral part,
A power converter having at least one of a function of converting AC power into DC power and a function of converting DC power into AC power and located inside the first housing, and a power converter.
It has a function of suppressing noise in the electric power obtained by the power converter, and is provided with a reactor located inside the box portion of the second housing.
A first opening is formed in the first housing, and the first flat surface portion and the first opening are opposed to each other.
The box portion included in the second housing includes a second flat surface portion and a second side surface portion, and a second opening portion is formed in the box portion, and the second flat surface portion and the second opening portion are formed. The outer peripheral portion of the second housing is provided outside the second side surface portion.
In the second housing, the first of the first housing is in a state where the second flat surface portion is located outside the first housing and the outer peripheral portion is located inside the first housing. Located in the penetration,
An electric power provided at an edge portion surrounding the first penetrating portion of the first housing and provided with a packing for filling between the first flat surface portion of the first housing and the outer peripheral portion of the second housing. In the converter
The edge portion is recessed from the inside of the first housing toward the outside of the first housing.
The packing is located inside the first housing and at a portion of the edge portion recessed toward the outside of the first housing.
By fixing the second housing with screws and compressing the packing, the outer peripheral portion of the second housing and the outer side of the packing provided on the edge portion of the first housing are contacted and fixed. A plurality of first screw tightening portions are provided in the first housing .
A first mounting plate to which the reactor is attached and separated from the second plane portion of the second housing from the reactor.
Further provided with a plurality of first screws for fixing the first mounting plate to the outer peripheral portion of the second housing.
The plurality of first screws used for fixing the first mounting plate are inserted into a plurality of bag nuts through screw holes provided in the outer peripheral portion of the second housing, and the screws are integrated with the first housing. A power conversion device characterized by being fastened . It is attached to the inside of the box portion of the second housing and in contact with the box portion, and at a position in contact with the winding portion provided on the reactor on the inner side wall portion of the box portion. The power conversion device according to claim 1, further comprising a heat conductive sheet for conducting the heat of the reactor to the box portion. An intake window is provided on the side of the first end portion while covering the outside of the first housing, and an exhaust window is provided on the side of the second end portion, forming a cooling duct together with the first housing. With the outer cover,
A heat sink located between the outer cover and the first housing and dissipating heat generated by the power converter.
A fan located between the outer cover and the first housing and located closer to the exhaust window than the heat sink is further provided.
The power conversion device according to claim 1 or 2 , wherein the second housing is provided on the intake window side, and the heat sink of the power converter is provided on the exhaust window side.

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