JP2013191703A - Exhaust fan support structure of semiconductor power converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust fan support structure of a semiconductor power converter in which an exhaust fan body can be extracted in a horizontal direction without providing a maintenance space over an exhaust part.SOLUTION: A centrifugal exhaust fan 18 is supported in an opening part formed on a housing upper part of a semiconductor power converter through a mounting plate 11. The centrifugal exhaust fan comprises an exhaust fan body 15 with a fan mounting plate fixed to an upper part thereof, and an inlet nozzle 13 whose tip is inserted into a suction opening of the exhaust fan body. On top of the mounting plate is formed a surrounding part 12 comprising a pair of guide support side plates for guiding a pair of mutually facing guide parts of the fan mounting plate of the exhaust fan body in the horizontal direction, and a pair of side plates at least one of which is detachable, and on bottom is supported in a vertically movable manner an inlet nozzle mounting plate 14 for fixedly supporting the inlet nozzle 13.

Description

  The present invention relates to an exhaust fan support structure for a semiconductor power conversion apparatus that supports an exhaust fan that exhausts hot air in a housing of the semiconductor power conversion apparatus to the outside.

  As an exhaust fan support structure of this type of semiconductor power conversion device, for example, the one described in Patent Document 1 is known. In this semiconductor power conversion device, a switching module, a rectifier module, an electrolytic capacitor, and the like that incorporate an insulated gate bipolar transistor (IGBT) as a heat generating component are incorporated in a casing. In this semiconductor power conversion device, the switching module, the rectifier module, the electrolytic capacitor, and the like are cooled by the cold air taken in from the lower part by exhausting upward from an exhaust fan disposed in the upper part of the casing.

In the conventional example described in Patent Document 1, hot air in the housing is exhausted upward by the exhaust fan, so that the storage space in which the semiconductor power converter is arranged is wide on the upper side of the semiconductor power converter. Requires space for exhaust.
However, when a large exhaust space cannot be obtained in the upper space of the semiconductor power converter, a centrifugal exhaust fan that exhausts in the centrifugal direction is used as the exhaust fan.

As a semiconductor power conversion device equipped with this centrifugal exhaust fan, for example, those having the configuration shown in FIGS. 7 to 9 are conventionally known.
In this conventional example, as shown in FIG. 7, for example, an electrolytic capacitor is housed in the lower portion, and an exhaust portion 101 is disposed in the upper portion of the casing 100 in which the switching module and the rectifier module are disposed in the upper portion. Here, as shown in FIGS. 8 and 9, the exhaust portion 101 has an inlet nozzle 102 disposed on an inlet nozzle mounting plate 103, and front, rear, left and right side plates 104 to 107 are arranged on the outer peripheral side of the top surface of the inlet nozzle mounting plate 103. And support columns 108 to 111 are arranged inside the side plates 104 to 107. An exhaust fan mounting plate 113 that supports the exhaust fan main body 112 is supported on the upper ends of the columns 108 to 111, and the upper surface of the exhaust fan mounting plate 113 is covered with the upper surface plate 114.

JP 2004-180424 A

By the way, in the exhaust fan support structure of the semiconductor power converter shown in FIGS. 7-9, since the centrifugal exhaust fan is applied, the exhaust from the exhaust fan is exhausted horizontally by centrifugal force. For this reason, the space for exhaust is not required in the upper part of the exhaust part 101, and it becomes possible to arrange | position a semiconductor power converter device also in the storage space where there is no room in the upper space.
However, since the centrifugal exhaust fan is applied in the conventional example, the tip of the inlet nozzle is fixed in the suction port of the exhaust fan main body.

For this reason, when inspecting or replacing the exhaust fan body, pull the exhaust fan body upward or move the exhaust fan body upward to separate the inlet of the exhaust fan body from the tip of the inlet nozzle. After that, it is necessary to pull out the exhaust fan main body forward and the like, and there is an unsolved problem that a predetermined maintenance space is required above the exhaust section.
Accordingly, the present invention has been made paying attention to the unsolved problems of the above-described conventional example, and is a semiconductor power conversion capable of pulling out the exhaust fan main body in the horizontal direction without providing a maintenance space above the exhaust section. An object of the present invention is to provide an exhaust fan support structure for an apparatus.

  In order to achieve the above object, a first aspect of an exhaust fan support structure for a semiconductor power converter according to the present invention is a centrifugal type through an attachment plate in an opening formed in an upper part of a housing of the semiconductor power converter. Supports the exhaust fan. The centrifugal exhaust fan includes an exhaust fan main body having a fan mounting plate fixed on an upper portion thereof, and an inlet nozzle whose tip is inserted into a suction port of the exhaust fan main body. The mounting plate includes a pair of guide support side plates for horizontally guiding a pair of opposing guide portions of the fan mounting plate of the exhaust fan body, and a pair of side plates at least one of which is detachable. In addition, an upper surface plate is formed in the upper portion, and at least one of the guide support side plate and the side plate has a vent hole, and an inlet nozzle mounting plate that fixes and supports the inlet nozzle in the lower portion can be moved up and down. I support it.

  According to the first aspect, the inlet nozzle mounting plate that supports and fixes the inlet nozzle is supported on the lower surface side of the mounting plate that forms the enclosure surrounding the exhaust fan main body at the upper portion thereof so as to be movable up and down. For this reason, the tip of the inlet nozzle can be detached from the suction port of the exhaust fan main body by lowering the inlet nozzle mounting plate when checking or repairing the exhaust fan. In this state, the exhaust fan main body can be pulled out in the horizontal direction.

  Further, according to a second aspect of the exhaust fan support structure of the semiconductor power converter according to the present invention, the mounting plate includes a mounting position in which a tip of the inlet nozzle is inserted into a suction port of the exhaust fan body, and the fixed position. A nozzle support member that supports the inlet nozzle mounting plate so that the inlet nozzle mounting plate can be moved up and down between the exhaust fan mounting position where the tip of the inlet nozzle descends from the suction port of the exhaust fan main body.

  According to the second aspect, the nozzle support member provided on the mounting plate supports the inlet nozzle mounting plate that supports the inlet nozzle so that it can be moved up and down in the vertical direction. The inlet nozzle is moved downward from the suction port of the exhaust fan main body to move the exhaust fan main body in the horizontal direction.

Further, in a third form of the exhaust fan structure of the semiconductor power conversion device according to the present invention, the nozzle support member is inserted into a nut fixed to the inlet nozzle mounting plate and an outer peripheral side of the mounting plate, and And a position adjusting bolt that is screwed onto the nut.
According to the third embodiment, the inlet nozzle mounting plate can be moved up and down between the mounting position and the detaching position by adjusting the screwing position of the position adjusting bolt with the nut.

The fourth aspect of the exhaust fan support structure of the semiconductor power conversion device according to the present invention is the drop prevention that prevents the position adjustment bolt from dropping by the nozzle support member being screwed to the tip of the position adjustment bolt. A nut is further provided.
According to the fourth aspect, since the drop-off preventing nut is provided at the tip of the fixing bolt, it is possible to reliably prevent the position adjusting nut from being detached from the fixing bolt and falling.

According to a fifth aspect of the exhaust fan support structure for a semiconductor power converter according to the present invention, the nozzle support member includes a spring washer interposed between the head of the position adjusting bolt and the mounting plate. It has more.
According to the fifth aspect, the position adjusting nut can be prevented from loosening by inserting the spring washer between the head of the position adjusting bolt and the mounting plate.

In the sixth aspect of the exhaust fan support structure of the semiconductor power conversion device according to the present invention, the inlet nozzle mounting plate includes a nozzle accommodating portion that projects from the lower surface and accommodates the inlet nozzle.
According to the sixth aspect, the inlet nozzle can be fixed at a low position, and the overall height of the exhaust fan can be kept low.

Further, according to a seventh aspect of the exhaust fan support structure of the semiconductor power conversion device according to the present invention, the pair of guide portions of the fan mounting plate is constituted by guide grooves having a reverse concave shape with a lower surface opened.
According to the seventh aspect, the fan mounting plate can be moved in the horizontal direction only by engaging the guide groove of the fan mounting plate with the upper surfaces of the pair of guide side plates.

According to an eighth aspect of the exhaust fan support structure for a semiconductor power converter according to the present invention, the fan mounting plate forms a hook locking portion for locking a crane hook on an outer surface forming the guide groove. doing.
According to the eighth aspect, since the hook locking portion for directly locking the crane hook to the fan mounting plate is formed, the hook hooking portion is not separately formed on the upper surface of the fan mounting portion. And the fan mounting portion and the exhaust fan main body can be lifted by a crane.

Moreover, as for the 9th aspect of the exhaust fan support structure of the semiconductor power converter device which concerns on this invention, the said enclosure is comprised so that a front plate can be attached or detached.
According to the ninth aspect, by removing the front plate, the fan mounting plate and the exhaust fan main body can be pulled out to the front side, and the maintainability can be improved.

  According to the present invention, when a centrifugal exhaust fan is applied, an effect of easily attaching and detaching the exhaust fan main body can be obtained without providing a maintenance space on the upper side of the housing.

It is a whole lineblock diagram showing one embodiment of the present invention. It is a figure which shows an exhaust part, Comprising: (a) is a front view, (b) is a perspective view. It is a disassembled perspective view of an exhaust part. It is sectional drawing which expands and shows the principal part in the state which made the inlet nozzle attachment plate of the exhaust part the mounting position. It is sectional drawing which expands and shows the principal part in the state which made the inlet nozzle attachment plate of the exhaust part the removal | desorption position. It is a perspective view which shows the state which removed the fan mounting plate of the exhaust part. It is a whole block diagram which shows a prior art example. It is a figure which shows the exhaust part of a prior art example, Comprising: (a) is a front view, (b) is a perspective view. It is a disassembled perspective view which shows the exhaust part of a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. In the figure, reference numeral 1 denotes a semiconductor power conversion device. The semiconductor power conversion device 1 includes, for example, a lower housing 2 containing an electrolytic capacitor, a switching module including an insulated gate bipolar transistor (IGBT), a rectifier module, and the like. The upper housing | casing 3 is provided.
The lower housing 2 and the upper housing 3 communicate with each other inside, and the lower housing 3 is formed with vent holes 5 in the front opening / closing door 4 in substantially the entire vertical direction. The upper housing 3 is formed with a vent hole 7 above the front opening / closing door 6 and an exhaust portion 9 is disposed in an opening 8 formed in the upper portion.

  The exhaust part 9 is formed in the rectangular parallelepiped shape which has a square cross section, as shown in FIGS. As clearly shown in FIG. 3, the exhaust portion 9 includes a mounting plate 11 that is attached to the opening 8 of the upper housing 3, a surrounding portion 12 that is attached to the upper outer peripheral portion of the mounting plate 11, and a mounting plate. 11, an inlet nozzle mounting plate 14 having an inlet nozzle 13 supported so as to be movable up and down, a fan mounting plate 16 having a centrifugal exhaust fan body 15 supported on the upper surface of the enclosure 12, and an upper surface. The upper surface plate 17 is closed.

  As shown in FIGS. 3 and 4, the mounting plate 11 includes a rectangular horizontal plate portion 22 having an opening 21 through which the inlet nozzle 13 is inserted at the center, and an upper portion from each outer periphery of the horizontal plate portion 22. And a bent plate portion 23 that is bent in a straight line. And the bolt insertion hole 24 is formed in the four corner positions inside the bending board part 23 in the horizontal board part 22, as shown in FIG.

  The enclosure portion 12 connects the pair of guide support side plates 31 and 32 fixed at the left and right positions on the upper surface of the horizontal plate portion 22 of the mounting plate 11 and the rear end surfaces of the guide support side plates 31 and 32 to The rear side plate 33 is fixed to the rear surface position on the upper surface, and the front side plate 34 is detachably attached to the front position on the upper surface of the mounting plate 11 by connecting the front end surfaces of the guide support side plates 31 and 32. . Each of the side plates 31 to 34 is formed with, for example, a lattice-shaped vent hole 35 that discharges the exhaust to the outside. In addition, the left and right guide support side plates 31 and 32 are formed with bent portions 37 formed by bending the four sides of a flat rectangular plate portion 36 inward to enhance rigidity. The front and rear back side plates 33 and the front side plate 34 are formed of flat plates.

  As shown in FIGS. 3 and 4, the inlet nozzle mounting plate 14 includes a horizontal plate portion 41 that can contact the outer peripheral side of the opening 21 in the horizontal plate portion 22 of the mounting plate 11, and an outer peripheral edge of the horizontal plate portion 41. And an inlet nozzle housing portion 42 formed of a concave portion that protrudes downward on the inner side. In the horizontal plate portion 41, bolt insertion holes 43 are formed at positions facing the bolt insertion holes 24 formed in the horizontal plate portion 22 of the mounting plate 11. An inlet nozzle 13 that opens to the upper housing 3 side is attached to the inlet nozzle storage portion 42, and the tip of the inlet nozzle 13 protrudes upward from the horizontal plate portion 41.

  As shown in FIGS. 3 and 4, the fan mounting plate 16 is formed by bending the horizontal plate portion 51 in contact with the inner peripheral surfaces of the left and right guide support side plates 31 and 32 and the left and right ends of the horizontal plate portion 51. Inverted guide grooves 52 and 53 are provided. On the front and rear end surfaces of the horizontal flat plate portion 51, a bent portion 54 that is bent downward is formed. Further, on the lower surface side of the horizontal plate portion 51, a suction port 15a is provided at the lower end, and an exhaust fan main body 15 of a centrifugal exhaust fan for exhausting the exhaust sucked from the suction port 15a from the outer peripheral surface of the cylinder is attached. As shown in FIG. 4, the centrifugal exhaust fan 18 is configured by inserting the tip of the inlet nozzle 13 into the inner peripheral surface of the suction port 15 a formed on the lower surface of the exhaust fan main body 15.

In addition, as shown in FIG. 4, it is preferable to form the left and right side surfaces of the exhaust fan main body 15 in a tapered surface so as to become narrower as it goes upward from the lower end. Thus, by making the left and right side surfaces of the exhaust fan body 15 tapered, the sliding resistance between the left and right guide support plates 31 and 32 can be reduced when the exhaust fan body 15 is slid, The exhaust fan body 15 can be easily extracted and attached.
However, the left and right side surfaces of the exhaust fan main body 15 may be formed as a surface shape other than the tapered surface.

  Also, as shown in FIG. 4, it is preferable to form a guide protrusion 39 that engages with a notch 38 formed in the bent portion 37 of the left and right guide support plates 31 and 32 on the lower surface side of the exhaust fan main body 15. . Thus, by forming the guide protrusion 39 on the lower surface side of the exhaust fan main body 15, the mounting position of the exhaust fan main body 15 can be accurately determined by the guide protrusion 39 and the guide grooves 52 and 53 of the fan mounting plate 16. Can be regulated. Therefore, the insertion amount of the tip of the inlet nozzle 13 into the suction port 15a of the exhaust fan main body 15 can be adjusted with high accuracy.

Further, as shown in FIG. 3, the outer plate portions 55 and 56 forming the guide grooves 52 and 53 are respectively provided with two hook locking portions 57 for locking a crane hook (not shown) on the front and rear end portions. Yes.
The nozzle support member 60 is fixed to the bolt insertion hole 24 of the mounting plate 11. As clearly shown in the enlarged view of FIG. 4, the nozzle support member 60 is inserted into the bolt insertion hole 24 and the bolt insertion hole 43 of the inlet nozzle mounting plate 14 from the upper surface side of the bolt insertion hole 24 of the mounting plate 11. The position adjustment bolt 61 is provided. The nozzle support member 60 includes a spring washer 62 and a washer 63 that are inserted between the head 61 a of the position adjustment bolt 61 and the upper surface of the mounting plate 11. Further, the nozzle support member 60 is screwed onto the position adjustment bolt 61 on the lower surface side of the inlet nozzle mounting plate 14 and fixed to the lower surface side of the bolt insertion hole 43 by fixing means such as welding, and the nut 64. A dropout prevention nut 65 constituted by two set nuts screwed to the position adjusting bolt 61 on the lower side is provided.

  Here, the screwing position of the drop-off prevention nut 65 with respect to the position adjustment bolt 61 is rotated by rotating the position adjustment bolt 61 so as to move upward (in the case of a right-hand screw system, counterclockwise), and at least the nut. The inlet nozzle mounting plate 14 is set at a position where the tip of the inlet nozzle 13 is detached below the suction port 15a of the fan body 15 at a position where the upper surface of the drop-off prevention nut 65 is in contact with the bottom surface of 64. .

  Further, the position adjusting bolt 61 is rotated so as to move downward (in the case of a right-hand thread system, it is rotated clockwise) so that the upper surface of the inlet nozzle mounting plate 14 is brought into the lower surface of the mounting plate 11. The inlet nozzle mounting plate 14 is set so that the tip of the inlet nozzle 13 is a mounting position to be inserted into the suction port 15a of the fan body 15 when the tightening position to be brought into contact is set.

Next, the operation of the above embodiment will be described.
Now, as shown in FIG. 1, it is assumed that the exhaust portion 9 is attached to the position of the opening 8 of the upper housing 3. In this state, as shown in FIG. 4, the position adjustment bolt 61 that is screwed into the nut 64 of the nozzle support member 60 is tightened. As a result, the upper surface of the horizontal plate portion 41 of the inlet nozzle mounting plate 14 is brought into contact with the lower surface of the horizontal plate portion 22 of the mounting plate 11 by the head portion 61a of the position adjusting bolt 61 and the nut 64, and the inlet nozzle mounting plate 14 is moved. Fixed at the mounting position.

At this time, as shown in FIG. 4, the horizontal plate portion of the fan mounting plate 16 in which the tip of the inlet nozzle 13 mounted on the inlet nozzle mounting plate 14 is supported by the left and right guide support side plates 31 and 32 of the enclosure portion 12. A centrifugal fan is configured by being inserted into a suction port 15a of an exhaust fan main body 15 attached to the lower surface of 51.
In this state, by rotating and driving a fan (not shown) in the exhaust fan main body 15, hot air in the upper housing 3 is sucked into the exhaust fan main body 15 through the inlet nozzle 13 and then blown out in the circumferential direction. And released to the outside through the vent hole 35 of the enclosure 12.

At this time, since the lower casing 2 and the upper casing 3 are under negative pressure, the lower casing 2 sucks cold air through the vent hole 5, and the upper casing 3 sucks cold air through the vent hole 7. The sucked cold air cools the electrolytic capacitor, cools the switching module and the rectifier module, and then sucks it into the exhaust fan main body 15 through the inlet nozzle 13 through the opening 8 formed on the upper surface of the upper housing 3. Is done.
For this reason, the electrolytic capacitor, the switching module, and the rectifier module that generate heat can be efficiently cooled by the cold air. In this state, since the exhaust discharged from the exhaust unit 9 is discharged in the horizontal direction through the enclosure 12, it is not necessary to provide an exhaust space above the exhaust unit 9.

  When performing maintenance or replacement of the centrifugal fan from the operating state of the power converter 1, first, at least the front side plate 34 is removed. Next, or before that, the position adjusting bolt 61 disposed inside the bent plate portion 23 on the outer periphery of the horizontal plate portion 22 of the mounting plate 11 is loosened. Accordingly, the distance between the head 61a of the position adjusting bolt 61 and the nut 64 is increased, whereby the inlet nozzle mounting plate 14 is lowered with respect to the mounting plate 11, and the inlet nozzle 13 is also lowered. Then, as shown in FIG. 5, when the bottom surface of the nut 64 comes into contact with the top surface of the drop-off prevention nut 65, the inlet nozzle mounting plate 14 becomes the detaching position, and the tip of the inlet nozzle 13 is connected to the exhaust fan main body 15. It separates downward from the suction port 15a. Accordingly, when viewed from the horizontal direction, the tip of the inlet nozzle 13 and the suction port of the exhaust fan main body 15 are in a position where they do not interfere with each other.

  In this state, as shown in FIG. 6, the fan mounting plate 11 can be pulled forward while engaging the guide grooves 32 and 33 with the upper surfaces of the left and right guide support side plates 31 and 32, respectively. Thus, maintenance and replacement of the exhaust fan main body 15 can be performed. Also in this case, it is not necessary to provide a maintenance space above the exhaust unit 9 in order to separate the inlet nozzle 13 and the exhaust fan main body 15 constituting the centrifugal exhaust fan.

In addition, the fan mounting plate 11 can be easily pulled out by sliding the fan mounting plate 11 with the guide support side plates 31 and 32 engaged in the guide grooves 32 and 33. Therefore, maintenance work and replacement work for the fan body can be easily performed in a short time.
Further, the fan mounting plate 11 has a horizontal plate portion 51, guide grooves 52 and 53 bent at the left and right end portions of the horizontal plate portion 51, and a downward bent portion formed at the front and rear end portions of the horizontal plate portion 51. 54, the rigidity of the fan mounting plate 11 can be ensured, and the thickness of the plate material can be reduced.

  Further, since the hook engaging portions 57 for engaging the crane hooks are formed on the left and right side plate portions 55 and 56 forming the guide grooves 52 and 53, the crane hooks are directly engaged with the hook engaging portions 57. The fan mounting plate 11 and the fan main body 51 can be lifted without using a locking member for separately locking the crane hook.

Incidentally, in the conventional example shown in FIGS. 7 to 9, the hook locking portion for locking the crane hook could not be formed. Therefore, for example, it has been necessary to form a female screw on the upper surface plate 114, and attach and hook a hook locking portion of another member to the female screw, and then lift the crane hook to the hook locking portion. Therefore, when the movement of the fan mounting plate and the fan main body is completed, if the hook locking portion is left as it is, an additional space is required for the height of the hook locking portion, so that it is necessary to remove the hook locking portion. .
However, in the above embodiment, the hook locking portion 57 is formed integrally with the fan mounting plate 11, and the hook locking portion 57 does not protrude upward, so that the inconvenience of the conventional example does not occur.

  Further, in the present embodiment, the configuration for raising and lowering the inlet nozzle mounting plate 14 between the mounting position and the detaching position is screwed into the position adjusting bolt 61 and the position adjusting bolt 61 so that the nozzle mounting plate 14 is horizontal. Has the configuration simply required to provide the nozzle support member 60 having the nut 64 fixed to the lower surface side of the bolt insertion hole 43 in the plate portion 41, and whether the inlet nozzle mounting plate 14 has reached the mounting position and the detaching position? It can be determined whether or not the position adjusting bolt 61 cannot rotate. For this reason, even when the hand is dark, it is possible to reliably detect mounting at the mounting position and the detaching position.

In addition, since the nozzle support member 60 is provided with the fall prevention nut 65 that is screwed to the lower end of the position adjustment bolt 61, it is ensured that the nut 64 is detached from the fixing bolt 61 and the nozzle mounting plate 14 falls downward. It is possible to prevent the inlet nozzle mounting plate 14 from moving up and down smoothly.
Further, since the spring washer 62 is mounted between the head 61a of the fixing bolt 61 and the mounting plate 11 on the nozzle support member 60, the position adjusting nut 64 can be prevented from loosening.

  In the above embodiment, the case where the position adjusting bolt 61 constituting the nozzle support member 60 is inserted from the upper side of the mounting plate 11 has been described, but the present invention is not limited to this, and the position adjusting bolt 61, the nut 64, The position adjusting bolt 61 can also be fixed to the horizontal plate portion 41 of the inlet nozzle mounting plate 14 with the fall prevention nuts turned upside down. In this case, a nut 64 that is screwed to the position adjusting bolt 61 is disposed on the upper surface side of the horizontal plate portion 22 of the mounting plate 11, so that the inlet nozzle mounting plate 14 is moved up and down by rotating the nut 64. It can be performed. Furthermore, although the case where the nut 64 is fixed to the inlet nozzle mounting plate 14 has been described in the above embodiment, the present invention is not limited to this, and the nut 64 can be rotated with respect to the inlet nozzle mounting plate 14. The inlet nozzle mounting plate 14 may be moved up and down by rotating the nut 64 from within the housing 3.

  In the above embodiment, the case where the drop prevention nut 65 is provided on the nozzle support member 60 has been described. However, the fall prevention nut 65 is omitted, and the position adjusting bolt 61 is screwed onto the nut 64 and then the fixing bolt 61. It is also possible to caulk the lower end of the armor or to weld a fall prevention tool. The spring washer 62 may be inserted between the position adjustment nut 64 and the inlet nozzle mounting plate 14.

  Moreover, in the said embodiment, although the case where the nozzle support member 60 was comprised with the position adjustment volt | bolt 61 and the nut 64 was demonstrated, it is not limited to this, The horizontal plate part 22 or inlet nozzle attachment of the attachment plate 11 A spiral inclined surface is formed on the horizontal plate portion 41 of the plate 14, and a rotation shaft provided with an engagement surface that engages with the spiral inclined surface is rotated from the upper surface side of the horizontal plate portion 22 of the mounting plate 11. You may make it arrange | position so that it can move. In this case, the nozzle mounting plate 14 can be moved up and down by rotating the rotating shaft to change the engaging position of the engaging surface with the spiral inclined surface in the vertical direction. For example, it is preferable to provide a lock means for locking the rotation shaft in a state where the horizontal plate portion 22 of the mounting plate 11 and the horizontal plate portion 41 of the inlet nozzle mounting plate 14 are in contact with each other. As this locking means, for example, it can be constituted by an engaging piece projecting in the radial direction formed on the rotating shaft and a detachable engaging pin engaging therewith. Further, a taper surface extending in the horizontal direction is formed on the upper surface of the horizontal plate portion 41 of the horizontal plate portion 22 of the mounting plate 11, and the engaging roller engaging with the taper surface is moved in the horizontal direction along the taper surface. The engaging roller may be arranged so as to be connected to the inlet nozzle mounting plate. Also in this case, it is preferable to provide a locking means for locking the engaging roller in a state where, for example, the horizontal plate portion 22 of the mounting plate 11 and the horizontal plate portion 41 of the inlet nozzle mounting plate 14 are in contact. As an example of the locking means, it is conceivable to form a locking recess for locking the engaging roller at the uppermost portion of the tapered surface.

  Moreover, in the said embodiment, the case where the guide grooves 52 and 53 were formed in the fan attachment board 16 was demonstrated. However, the present invention is not limited to the above-described configuration, and a ridge extending downward is formed on the left and right ends of the fan mounting plate 16, and guide grooves are formed on the upper ends of the left and right guide support side plates 31 and 32. You may do it.

  DESCRIPTION OF SYMBOLS 1 ... Semiconductor power converter device, 2 ... Lower housing | casing, 3 ... Upper housing | casing, 9 ... Exhaust part, 11 ... Mounting plate, 12 ... Enclosure, 13 ... Inlet nozzle, 14 ... Inlet nozzle mounting plate, 15 ... Fan main body , 16 ... Fan mounting plate, 21 ... Opening part, 22 ... Plate part, 23 ... Bending part, 24 ... Bolt insertion hole, 31, 32 ... Guide support side plate, 33 ... Back side plate, 34 ... Front side plate, 41 ... Horizontal plate part, 42 ... Inlet nozzle housing part, 43 ... Bolt insertion hole, 51 ... Horizontal plate part, 52, 53 ... Guide groove, 54 ... Bent part, 55, 56 ... Side plate part, 57 ... Hook locking part, 60 ... Nozzle support member, 61 ... Position adjustment bolt, 62 ... Spring washer, 63 ... Washer, 64 ... Nut, 65 ... Fall-off prevention nut

Claims (9)

Support the centrifugal exhaust fan through the mounting plate in the opening formed in the upper part of the housing of the semiconductor power converter,
The centrifugal exhaust fan is composed of an exhaust fan main body having a fan mounting plate fixed on an upper portion thereof, and an inlet nozzle whose tip is inserted into a suction port of the exhaust fan main body.
The mounting plate is composed of a pair of guide support side plates for horizontally guiding a pair of opposing guide portions of the fan mounting plate of the exhaust fan body, and a pair of side plates at least one of which can be attached and detached. In addition, an upper surface plate is formed in the upper portion, and at least one of the guide support side plate and the side plate has a vent hole, and an inlet nozzle mounting plate for fixing and supporting the inlet nozzle in the lower portion is supported to be vertically movable. A structure for supporting an exhaust fan of a semiconductor power converter characterized by the above.   The mounting plate includes a fixed position where the tip of the inlet nozzle is inserted into the suction port of the exhaust fan body, and an exhaust fan attachment / detachment position where the tip of the inlet nozzle descends from the suction port of the exhaust fan body from the fixed position. The exhaust fan support structure of the semiconductor power converter according to claim 1, further comprising a nozzle support member that supports the inlet nozzle mounting plate so as to be movable up and down.   The nozzle support member includes at least a nut fixed to the inlet nozzle mounting plate and a position adjusting bolt that is inserted into an outer peripheral side of the mounting plate and screwed into the nut. 3. An exhaust fan support structure for a semiconductor power conversion device according to 2.   4. The semiconductor power conversion device according to claim 3, wherein the nozzle support member further includes a drop-off prevention nut that is screwed onto a tip of the position adjustment bolt to prevent the position adjustment bolt from falling off. 5. Exhaust fan support structure.   5. The semiconductor power conversion device according to claim 3, wherein the nozzle support member further includes a spring washer interposed between a head of the position adjustment bolt and the mounting plate. Exhaust fan support structure.   6. The exhaust fan support for a semiconductor power conversion device according to claim 1, wherein the inlet nozzle mounting plate includes a nozzle accommodating portion that protrudes from a lower surface and accommodates the inlet nozzle. 7. Construction.   The exhaust of the semiconductor power conversion device according to any one of claims 1 to 5, wherein the pair of guide portions of the fan mounting plate is configured by guide grooves having a reverse concave shape with an open bottom surface. Fan support structure.   The exhaust fan support of the semiconductor power converter according to claim 6, wherein the fan mounting plate is formed with a hook locking portion for locking a crane hook on an outer surface forming the guide groove. Construction.   The exhaust fan support structure for a semiconductor power converter according to any one of claims 1 to 8, wherein the enclosure is configured such that a front plate is detachable.

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