JP5381004B2 - Inverter device - Google Patents

Description

  The present invention relates to an inverter device that houses a fan unit and a main circuit portion.

An inverter device, which is a power conversion device, includes a printed circuit board on which a control circuit and a power supply circuit are configured, a main circuit portion including a semiconductor element, a cooling fin for the semiconductor element, and a cooling fan for cooling these. I have. Here, the cooling fan needs to be replaceable, and various mounting structures have been proposed (for example, see Patent Document 1).
8 to 10 are perspective views showing the external appearance of the conventional inverter device as described above.

As shown in FIG. 8, in this inverter device, a main circuit portion and a cooling fan are arranged inside a housing 1, and a cover 2 that closes an opening of the housing 1 is fixed with a plurality of screws 3.
As shown in FIGS. 9 and 10, the fan unit 4 is disposed at the upper part inside the housing 1, and the main circuit unit 5 is disposed at the lower part of the fan unit 4.
In the fan unit 4, a plurality of cooling fans 6 to 13 are mounted on a unit case 14.

  Then, when replacing the cooling fans 6 to 13, first, the screw 3 is removed and the cover 2 is opened (see FIG. 9) to expose the fan unit 4 inside the housing 1. Next, the screw (not shown) that fixes the wiring for supplying power to the cooling fans 6 to 13 and the screw 15 that fixes the fan unit 4 are removed. Then, the fan unit 4 is pulled forward (see FIG. 10), and the cooling fans 6 to 13 are replaced.

The replacement cooling fans 6 to 13 are housed in the reverse order. That is, after the fan unit 14 to which the cooling fans 6 to 13 are mounted is returned to the inside of the housing 1, the wiring is fixed with screws and the fan unit 4 is fixed with screws 15. Thereafter, the cover 2 is fixed to the housing 1 with a plurality of screws 3. The above components are removed and fixed using a predetermined tool such as a screwdriver.
JP 2007-325383 A

  However, in the conventional inverter device described above, there is no member that partitions between the fan unit 4 disposed in the upper part of the housing 1 and the main circuit unit 5 disposed in the lower part. When pulling out, the dust accumulated on the cooling fans 6 to 13 after many years of use falls to the main circuit part 5 side, so that the cleaning work is necessary or the cleaning work is incomplete. The main circuit unit 5 may cause problems such as poor insulation and ignition.

Further, when pulling out the fan unit 4 forward, the operator must support the weight of the unit, and if the inverter device has a large capacity and a large number of cooling fans, the burden on the operator increases.
Further, in the conventional inverter device in which there is no member that partitions between the fan unit 4 and the main circuit unit 5 inside the housing 1, the exhaust air from the cooling fans 10 to 13 for internal stirring returns to the inside of the housing 1. As a result, the cooling efficiency inside the housing 1 is reduced.

Furthermore, the cover 2 that closes the opening of the housing 1 is heavy, and there are many places to be fixed with screws, which increases the number of assembly steps, and when the cover 2 is removed during replacement work, the main circuit portion 5 Are completely exposed, and foreign matters such as screws and dust tend to enter the main circuit portion 5.
The present invention has been made in view of the above points, and it is easy to replace the fan mounted on the fan unit. At the time of replacing the fan, foreign matters such as screws and dust are present in the main circuit portion. An object of the present invention is to provide an inverter device that can be prevented from entering.

In order to achieve the above object, an inverter device according to a first aspect of the present invention includes a fan unit in which a plurality of fans are mounted in an upper space of a housing, and a main circuit portion including a heat generating component in the lower space of the housing. In the inverter device that is housed and has an opening that opens at the front surface of the housing closed by a detachable cover, a partition plate that partitions the upper space and the lower space inside the housing and forms a vent hole And the cover is composed of an upper cover that closes the opening on the upper space side and a lower cover that closes the opening on the lower space side, and the partition plate is formed of the upper cover. When the fan unit is removed and pulled out into the opening on the upper space side, the lower surface of the fan unit functions as a rail that slides and the fan unit When placing the sealing plate for closing said vent hole in the upper space side of the opening in the drawer and the partition plate on a provided fixing means for fixing the sealing plate to the lower cover.

According to the present invention, when the fan unit is pulled out to the opening on the upper space side, the space between the lower space for storing the main circuit portion is partitioned by the partition plate. It becomes difficult for dust to fall to the main circuit part side, and cleaning work can be reduced. Further, the screws or the like that have fixed the fan unit are less likely to fall into the main circuit portion.
The upper cover that covers the upper space that houses the fan unit is small and lightweight. The upper cover can be easily attached and detached, and even if the upper cover is removed during replacement work, Since the main circuit portion arranged in the lower space is covered with the lower cover and is not exposed to the outside, it is difficult for foreign matters such as screws and dust to enter the main circuit portion.

Further , according to the present invention, when the fan unit is pulled out to the opening on the upper space side, the fan unit slides on the partition plate, so that it is not necessary for the operator to support the unit weight and the number of fans is reduced. Even with a large number of large-capacity fan units, the burden on the operator can be reduced.

Further , according to the present invention, the sealing plate is fixed to the lower cover by the fixing means, so that all the ventilation holes formed in the partition plate are completely closed by the sealing plate. It is possible to reliably prevent the dust and the parts such as screws from falling to the main circuit side.

According to a second aspect of the present invention, in the inverter device according to the first aspect, one of a male type and a female type relay connector that relays the power harness of the fan unit is fixed to the opening side of the partition plate. The connector fixing part to be formed was formed integrally.
According to this invention, since the connector fixing portion is provided on the opening side of the partition plate, the relay connector can be attached / detached immediately after the upper cover is removed.

According to a third aspect of the present invention, in the inverter device according to the second aspect , the height of one of the male-type and female-type relay connectors fixed to the connector fixing portion is the opening portion on the upper space side. The connector fixing portion is formed by being bent at a lower position with respect to the partition plate so as to be at a lower position than the lower surface of the fan unit that is pulled out.
According to the present invention, when the fan unit is pulled out, the relay connector fixed to the connector fixing portion does not get in the way, so that the fan unit can be pulled out immediately.

Furthermore, the invention according to claim 4 is the inverter device according to any one of claims 1 to 3 , wherein an end of the partition plate is fixed to a side plate extending in a vertical direction of the casing.
According to this invention, even if the drive vibration of the fan unit is transmitted to the side plate of the housing, the side plate is fixed to the partition plate and the rigidity due to the vibration is improved, so that resonance that adversely affects internal components is prevented. can do.

  According to the inverter device of the present invention, when the fan unit is pulled out from the upper space of the housing, the lower space that stores the main circuit portion is partitioned by the partition plate. Accumulated dust is less likely to fall to the main circuit portion side, so that cleaning work can be reduced, and screws and the like that have fixed the fan unit can also be made difficult to fall to the main circuit portion.

  In addition, since a large and heavy weight cover that covers the entire surface of the opening of the housing as in the conventional device is not used, a small and lightweight upper cover that covers the upper space that houses the fan unit is used. The cover can be easily attached and detached, and the main circuit portion is not exposed even if the upper cover is removed during replacement work, so that foreign matters such as screws and dust can be made difficult to enter the main circuit portion.

Hereinafter, the best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described in detail with reference to the drawings. The same components as those shown in FIGS. 8 to 10 are denoted by the same reference numerals, and detailed description thereof is omitted.
(First embodiment)
1 to 4 show an inverter device of a first embodiment according to the present invention, FIG. 1 is a perspective view showing an appearance of the inverter device of the first embodiment, and FIG. 2 is an inverter of the first embodiment. The figure which shows the state which removed the upper front cover of the apparatus, FIG. 3 is the figure which shows the state which pulled out the fan unit of the inverter apparatus of 1st Embodiment from the inside of a housing | casing, FIG. 4 (a) is AA of FIG. FIG. 4B is a diagram showing a state in the middle of pulling out the fan unit of the inverter device of the first embodiment from the inside of the housing.

As shown in FIGS. 1 and 2, the inverter device of the present embodiment includes a housing 20 made of a metal plate having an open front surface and an upper front cover 21 made of a metal plate that closes the opening of the housing 20. And a lower front cover 22, and a ceiling plate 23 constituting the housing 20 is provided with a ventilation opening 24 that is opened in a rectangular shape.
As shown in FIGS. 3 and 4 (a) and 4 (b), a partition plate 25 and a unit support 26 for partitioning the internal space into an upper space and a lower space are arranged inside the housing 20, and these partitions are arranged. The upper space of the plate 25 and the unit support portion 26 is a space for storing the fan unit 27, and the lower space of the partition plate 25 is a space for storing the main circuit portion 5 (see FIG. 4) including a heat generating component, The lower space of the unit support portion 26 is a space for storing the cooling fins 5a on which the heat generating parts such as IGBTs and diodes constituting the main circuit portion 5 are mounted.

Then, the upper front cover 21 closes the upper opening of the housing 20 that leads to the upper space in which the fan unit 27 is housed, and the lower opening of the housing 20 that leads to the lower space in which the main circuit portion 5 is housed is the lower front cover. 22 is blocked.
The lower front cover 22 is fixed detachably while closing the lower opening by screwing a plurality of screws 22a into a contact plate (not shown) provided at the periphery of the lower opening of the housing 20. .

  The upper front cover 21 is a rectangular plate-shaped metal member in which a large number of slits 21a are formed. A screw passage hole 21b is formed at the upper center in the longitudinal direction, and a pair of screw passage slits 21c are formed at both lower ends in the longitudinal direction. Has been. Further, screw holes 20d, 20e are formed at positions corresponding to the screw passage holes 21b and the pair of screw passage slits 21c in the contact plate portions 20a, 20b, 20c provided at the periphery of the upper opening of the housing 20. ing. The upper front cover 21 is screwed into the screw holes 20d, 20e of the contact plate portions 20a, 20b, 20c by screwing a plurality of screws 21f passed through the screw passage holes 21b and the pair of screw passage slits 21c. It is detachably fixed while closing the opening. The numerous slits 21a function as exhaust holes.

  As shown in FIG. 3, the fan unit 27 includes a unit case 29 that supports the plurality of cooling fans 28, and a subunit case 31 that is fixed to the front surface of the unit case 29 and supports the plurality of exhaust fans 30. Yes. The unit case 29 and the subunit case 31 are supported such that the lower surfaces of the plurality of exhaust fans 30 are positioned below the lower surfaces of the plurality of cooling fans 28.

  The partition plate 25 is a rectangular plate-shaped metal member. As shown in FIG. 3, the partition plate 25 corresponds to the plurality of exhaust fans 30 of the fan unit 27 disposed in the upper space from below, and communicates with the lower opening. Shaped holes are formed, and these rectangular holes function as the exhaust holes 25 a of the exhaust fan 30. Although this partition plate 25 is not shown in detail, a pair of bent portions are formed at both edges in the short direction, and one bent portion located on the front side is above the lower front cover 22. The other bent portion that is fixed to the edge and located on the back side is fixed to the unit support portion 26 via a screw.

The unit support portion 26 is formed with rectangular holes that correspond to the plurality of cooling fans 28 of the fan unit 27 disposed in the upper space from below and communicate with the lower opening, respectively. The hole having the shape is a hole 26 b for exhausting the outside air of the cooling fan 28.
As shown in FIG. 4A, the upper surface 25c of the partition plate 25 and the upper surface 26c of the unit support portion 26 extend in parallel while being different from each other.

  Further, as shown in FIGS. 3 and 4A, the fan unit 27 has a peripheral portion of the lower surface of each cooling fan 28 supported by the unit case 29 in contact with the upper surface 26c of the unit support portion 26, and the screw unit 27 is screwed. 27a passes through the screw passage hole 29a formed in the unit case 29 and is screwed into the screw hole 26a formed in the unit support portion 26, so that the space 27a is fixed to the casing 20 (including the unit support portion 26) while being fixed in the upper space. Be placed. Here, the member denoted by reference numeral 32 fixed to the inner wall of the housing 20 in FIG. 4A is a unit case 29 in which the peripheral edge portion of the lower surface of the cooling fan 28 is in contact with the upper surface 26c of the unit support portion 26. It is an elastic support member that presses and supports the unit support portion 26 side by elastic deformation. Further, the fan unit 27 can be slid in the front-rear direction toward the upper opening of the housing 20 by removing the screw 27a.

  As shown in FIG. 1, the fan unit 27 of the inverter device configured as described above drives the cooling fan 28 and the outside air introduced from the lower surface and the lower side surface of the housing 20 passes through the cooling fins 5a to perform heat exchange. The exhaust air is exhausted from the ventilation opening 24 through the exhaust hole 26b, and the high-temperature air existing on the main circuit portion 5 side in the lower space is exhausted by the suction operation of the air inside the housing 20 by driving the exhaust fan 30. Are passed through the holes 25a and the exhaust fan 30 and introduced into the upper space, and are discharged from the upper space through the numerous slits 21a formed in the upper front cover 21 to the outside.

Next, a procedure for replacing the cooling fan 28 and the exhaust fan 30 in the inverter device of this embodiment will be described with reference to FIGS. 4 (a) and 4 (b).
First, the upper front cover 21 that closes the upper opening of the housing 20 is removed by removing the plurality of screws 21f. Next, the fixed state of the fan unit 27 with respect to the housing 20 and the unit support portion 26 is released by removing the plurality of screws 27a.

Then, the fan unit 27 is moved toward the upper opening of the housing 20. At this time, the fixing bolt 30a of the exhaust fan 30 supported by the sub unit case 31 slides on the upper surface 25c of the partition plate 25, and the peripheral edge portion of the lower surface of the cooling fan 28 supported by the unit case 29 is formed. The upper surface 26c of the unit support portion 26 is slid and moved.
For this reason, as shown in FIG. 4B, the thick solid line indicating the upper surface 25c of the partition plate 25 and the upper surface 26c of the unit support portion 26 becomes the rail surface 33 when the fan unit 27 is pulled out. The rail surface 33 is pulled out to the front side of the housing 20 while sliding.

  In this way, the fan unit 27 is pulled out to the front side of the housing 20, the cooling fan 28 and the exhaust fan 30 are replaced, and a fan in which the replaced cooling fan 28 and exhaust fan 30 are arranged in the reverse procedure to the above. The unit 27 is disposed in the upper opening of the housing 20 while sliding the rail surface 33, and the screw 27a is attached to the unit support in a state where the unit case 29 is pressed toward the unit support 26 by the elastic support member 32. The screw holes 26a of 26 and the screw holes provided in the inner wall of the housing 20 are screwed. Then, the upper opening of the housing 20 is closed with the upper front cover 21, and the screws 21 f are screwed into the screw holes 20 d and 20 e of the contact plate portions 20 a, 20 b and 20 c to fix the upper front cover 21 to the housing 20. Thus, the replacement work of the cooling fan 28 and the exhaust fan 30 is completed.

Next, the effect of this embodiment is demonstrated.
According to the present embodiment, when the fan unit 27 is pulled out from the inside of the housing 20, at least the upper space that houses the fan unit 27 and the lower space that houses the main circuit unit 5 are partitioned by the partition plate 25. In addition, the dust accumulated on the cooling fan 28 and the exhaust fan 30 after many years of use is less likely to fall to the main circuit unit 5 side, so that the cleaning work can be reduced and the insulation failure of the main circuit unit 5 due to the adhesion of dust. Can prevent problems such as ignition.

  Further, when the fan unit 27 is pulled out to the front side of the housing 20, the fan unit 27 slides on the rail surface 33 constituted by the upper surface 25 c of the partition plate 25 and the upper surface 26 c of the unit support portion 26. It is not necessary for the operator to support the unit weight, and the burden on the operator can be reduced even with the large capacity fan unit 27 having a large number of cooling fans 28 and exhaust fans 30.

Further, the partition plate 25 is disposed below the exhaust fan 30, and the upper space above the partition plate 25 is partitioned from the cooling fan 28 side by the unit case 29 of the fan unit 27. The air discharged from 30 does not return to the lower space of the housing 20, and the cooling efficiency in the lower space of the housing 20 does not decrease.
When the cooling fan 28 and the exhaust fan 30 are exchanged, an upper portion that houses the fan unit 27 without using a large and heavy cover that covers the entire surface of the opening of the housing as in the conventional apparatus. Since the small and lightweight upper front cover 21 covering the space is used, the upper front cover 21 can be easily attached and detached, and even if the upper front cover 21 is removed during replacement work, it is arranged in the lower space. Since the main circuit portion 5 is covered with the lower front cover 22 and is not exposed to the outside, foreign matters such as screws and dust can be prevented from entering the main circuit portion 5.
As described above, according to the present embodiment, the replacement work of the cooling fan 28 and the exhaust fan 30 is facilitated, the number of parts is reduced, the cooling efficiency is improved, and a highly reliable inverter device can be provided.

(Second Embodiment)
Next, FIG. 5 shows a main part of the inverter device of the second embodiment according to the present invention, and FIG. 5 (a) is a diagram showing a state in which the fan unit is pulled out from the upper space of the housing. FIG. 5B is a perspective view showing a seal plate disposed on the partition plate. The same components as those shown in FIGS. 1 to 4 are denoted by the same reference numerals and description thereof is omitted.

In this embodiment, as shown in FIG. 4, after the fan unit 27 is pulled out from the upper space of the housing 20, a seal plate 34 that closes the plurality of exhaust holes 25 a formed in the partition plate 25 is attached. Has been.
The seal plate 34 includes a flat plate-shaped seal portion 34a that closes the plurality of exhaust holes 25a, and a pair of screw passage slits 34c provided in a bent portion 34b that is bent at a right angle from the seal portion 34a. ing.

  In the present embodiment, the upper screw 22a that fixes the lower front cover 22 to the housing 20 is removed, and the seal portion 34a of the seal plate 34 is brought into contact with the upper surface 25c of the partition plate 25 so that all the exhaust holes are exhausted. The seal plate 34 is temporarily fixed on the partition plate 25 by closing the screw 25a, corresponding the screw passage slit 34c to a screw passage hole (not shown) of the lower front cover 22, and screwing the removed screw 22a.

  According to the present embodiment, immediately before the fan unit 27 is pulled out from the inside of the housing 20, all the exhaust holes 25 a formed in the partition plate 25 are fixed by temporarily fixing the seal plate 34 on the partition plate 25. Since it is completely closed by the seal portion 34a of the seal plate 34, it is possible to reliably prevent dust, screws, and other components accumulated on the cooling fan 28 and the exhaust fan 30 from falling to the main circuit portion 5 side. it can.

(Third embodiment)
6 and 7 show the main part of the inverter device according to the third embodiment of the present invention, and FIG. 6 shows the main part of the upper space of the housing in which the fan unit is arranged. FIG. 7 is a perspective view showing the external shape of a partition plate having a different structure.
As shown in FIG. 7, the partition plate 35 of the present embodiment is a rectangular plate-shaped metal member, and corresponds to the plurality of exhaust fans 30 of the fan unit 27 from below and communicates with the lower opening. Hole 35a is formed. A pair of bent portions 35 b and 35 c are formed on both edges in the longitudinal direction of the partition plate 35, and one bent portion 35 b located on the front side of the housing 20 is the upper edge of the lower front cover 22. The other bent portion 35c located on the back side is fixed to the unit support portion 26 via a screw (not shown). A bent portion 25d is also formed at one edge in the longitudinal direction of the partition plate 35, and is fixed to the side plate of the housing 20 via screws (not shown).

On the front side of the other edge of the partition plate 35 in the longitudinal direction, a connector fixing portion 36 is formed that is bent so that a stepped portion 36a exists at a lower position with respect to the surface on which the exhaust hole 35a is formed. Has been.
The connector fixing portion 36 includes a bent portion 36b formed by bending from an end portion of the step portion 36a, and a connector fitting hole 36c formed in the step portion 36a.

As shown in FIG. 6, the screw 37 passing through the side plate of the housing 20 is screwed into the screw hole provided in the bent portion 36 b, so that the connector fixing portion 36 is fixed to the housing 20.
A female relay connector 39 is fitted into the connector fitting hole 36c of the stepped portion 36a, and this relay connector 39 extends from the drive portion (not shown) of the main circuit portion 5. The tip of 38 is fixed. Here, the upper end of the relay connector 39 is set to a position below the lower surface of the fan unit 27 (unit support portion 26) by a dimension T.

A power harness 40 of the cooling fan 28 is drawn out from the front of the unit case 29 of the fan unit 27, and a male relay connector connected to a female relay connector 39 is connected to the tip of the power harness 40. 41 is fixed.
According to the present embodiment, the relay connectors 39 and 41 that electrically connect the drive unit of the main circuit unit 5 and the cooling fan 28 are provided on the opening side of the housing 20, and are fixed to the connector fixing unit 36. Since the upper end of the relay connector 39 is disposed below the lower surface of the fan unit 27 so as not to obstruct the drawer of the fan unit 27, the relay connector 39, The operation of attaching and detaching 41 and the operation of pulling out the fan unit 27 and replacing the cooling fan 28 and the exhaust fan 30 can be performed efficiently.

  Further, for example, even if vibration is transmitted from the fan unit 27 to the side plate of the housing 20, the side plate of the housing 20 is improved in rigidity due to vibration because the bent portion 36b of the connector fixing portion 36 is fixed. Resonance that adversely affects internal components can be prevented.

1 is a perspective view showing an external appearance of an inverter device according to a first embodiment of the present invention. It is a figure which shows the state which removed the upper front cover of the inverter apparatus of 1st Embodiment which concerns on this invention. It is a figure which shows the state which pulled out the fan unit of the inverter apparatus of 1st Embodiment which concerns on this invention from the inside of a housing | casing. (A) is the AA arrow directional view of FIG. 1, (b) is a figure which shows the state in the middle of pulling out the fan unit of the inverter apparatus of 1st Embodiment which concerns on this invention from the inside of a housing | casing. (A) is a figure which shows the state which pulled out the fan unit from the upper space of the housing | casing of 2nd Embodiment which concerns on this invention, (b) is a perspective view which shows the seal plate arrange | positioned on a partition plate. It is a figure which shows the principal part which has arrange | positioned the fan unit in the upper space of the housing | casing of 3rd Embodiment which concerns on this invention. It is a perspective view which shows the external appearance shape of the partition plate of 3rd Embodiment which concerns on this invention. It is a perspective view which shows the external appearance of the conventional inverter apparatus. It is a figure which shows the state which removed the front cover of the conventional inverter apparatus. It is a figure which shows the state which removed the fan unit of the conventional inverter apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 5 ... Main circuit part, 5a ... Cooling fin, 20 ... Housing, 20a, 20b, 20c ... Contact plate part, 21 ... Upper front cover (upper cover), 21a ... Slit, 22 ... Lower front cover (lower cover) 25 ... Partition plate, 25a ... Exhaust hole (ventilation hole), 25c ... Upper surface of partition plate, 25d ... Bent part, 26 ... Unit support part, 26a ... Screw hole, 26b ... Hole for exhausting outside air, 26c ... upper surface of unit support, 27 ... fan unit, 27a ... screw, 28 ... cooling fan (fan), 29 ... unit case, 29a ... screw passage hole, 30 ... exhaust fan (fan), 30a ... fixing bolt, 31 ... Sub unit case, 32 ... elastic support member, 33 ... rail surface (rail), 34 ... seal plate, 34a ... seal portion, 34b ... bent portion, 34c ... screw passage slit, 35 ... partition 35a ... exhaust holes, 35b, 35c ... bent portions, 36 ... connector fixing portions, 36a ... stepped portions, 36b ... bent portions, 36c ... connector fitting holes, 37 ... screws, 38, 40 ... power harness , 39, 41 ... relay connector, 40 ... power harness, 41 ... relay connector

Claims (4)

A fan unit with a plurality of fans mounted is housed in the upper space of the housing, a main circuit section including a heat generating component is housed in the lower space of the housing, and an opening opening on the front surface of the housing is removable. In an inverter device that is closed with a cover,
A partition plate that divides the upper space and the lower space and forms a vent hole is disposed inside the housing, and the cover includes an upper cover that closes the opening on the upper space side, and the lower space. A lower cover that closes the opening on the side ,
The partition plate functions as a rail on which the lower surface of the fan unit slides when the upper cover is removed and the fan unit is pulled out to the opening on the upper space side.
Fixing means is provided for fixing the seal plate to the lower cover when the fan unit is pulled out to the opening on the upper space side and a seal plate for closing the vent hole is disposed on the partition plate. An inverter device characterized by. The connector fixing part which fixes one of the male type and female type relay connector which relays the power supply harness of the said fan unit was integrally formed in the said opening part side of the said partition plate. Inverter device. The connector fixing so that one height of the male and female relay connectors fixed to the connector fixing portion is lower than the lower surface of the fan unit drawn out to the opening on the upper space side. The inverter device according to claim 2 , wherein the portion is formed by being bent at a low position with respect to the partition plate . The inverter device according to any one of claims 1 to 3 , wherein an end portion of the partition plate is fixed to a side plate extending in a vertical direction of the housing .

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