JP7702302B2 - controller - Google Patents

Description

The present invention relates to a controller that includes a housing that houses electronic elements that generate a large amount of heat, and a fan attached to the housing.

Patent Document 1 describes a controller for controlling a robot that includes a control circuit board and multiple drive circuit boards connected to the control circuit board. Each drive circuit board is arranged vertically relative to the control circuit board. A power module and a metal heat sink are attached to each drive circuit board.

The controller in Patent Document 1 has a rectangular parallelepiped housing that contains multiple units such as a power supply circuit board, a communication interface board, and a drive power supply circuit board in addition to a control circuit board and a drive circuit board. A cooling fan is attached to the housing so as to face the heat sinks mounted on the control circuit board and the drive circuit board.

Patent No. 5803213

Conventionally, a structure for attaching a cooling fan to a housing involves first fixing a fixing bracket to screw the fan into the opening of the housing with a rivet or the like, and then positioning the fan and fan cover relative to the fixing bracket and screwing it in place.

However, with conventional mounting structures, the fan and fan cover cannot be attached to or detached from the housing as a single unit. In addition, because the fan wiring cannot be accessed when the fan cover is attached to the fan, the fan wiring must be connected with the fan cover removed. This makes it difficult to attach or detach the fan and fan cover as a single unit, and requires a lot of work. Furthermore, because the screw holes for the fixing bracket are in a position hidden by the fan cover, the tips of the screws that secure the fan must be passed through the screw holes in the fixing bracket by feel. This makes the work difficult.

In view of the above problems, the objective of the present invention is to improve the ease of installation and removal of a fan from a controller housing and to reduce the amount of work required.

In order to solve the above problems, the present invention provides a housing, a fan unit that is detachably attached to an opening of the housing, and a substrate that is housed in the housing, the fan unit comprising a fan having an impeller and a casing, a fan cover that abuts against the casing, and an attachment member that abuts against the casing from the side opposite the fan cover, the attachment member comprising an attachment plate portion that extends outside the fan cover when viewed from the direction facing the fan cover and is fixed to the edge of the opening, the fan cover comprising an extension portion that extends outside the casing and a bent plate portion that bends from the tip of the extension portion toward the casing, and the wiring of the fan is arranged in a wiring passage between the bent plate portion and the casing.

According to the present invention, the fan, fan cover, and mounting member are unitized, and the mounting member has a mounting plate portion that extends outward beyond the fan cover. In addition, a wiring passage is provided between the fan cover and the casing. In this way, if the fan, fan cover, and mounting member are unitized, and the fan wiring can be pulled out between the fan cover and the casing when assembling the fan unit, the work of attaching and detaching the fan to the housing is good and the labor required is small. In other words, the entire fan unit can be tilted toward the opening with the mounting plate portion as the center, and the work of connecting the fan wiring to the power supply connector located inside the opening can be easily performed. In addition, after connecting the wiring, the fan unit can be positioned in the opening, and the fixing work can be performed with screws or the like while visually checking the overlapping portion of the mounting plate portion and the edge of the opening.

In the present invention, it is preferable that the fan cover and the casing are rectangular, the fan cover has a first edge where the extension is provided and a second edge that intersects with the first edge, the mounting plate extends to the outside of the second edge, and the wiring passage extends to the corner where the first edge and the second edge intersect. In this way, when assembling the fan unit, the wiring can be pulled out from the wiring passage to near the mounting plate. This makes it easy to connect the fan wiring to the power supply connector located inside the opening.

In the present invention, it is preferable that the casing is provided with a wiring groove that is connected to the wiring passage. In this way, the fan unit can be assembled by placing wiring in the wiring groove, so that the fan wiring can be easily pulled out into the wiring passage.

In the present invention, the casing preferably comprises an outer plate against which the fan cover abuts, an inner plate against which the mounting member abuts, and a body portion that connects the outer plate and the inner plate and surrounds the impeller, and a wiring holder is provided on the edge of the inner plate. In this way, the wiring that has been redirected toward the inside of the housing can be held by the wiring holder, improving workability when connecting the wiring to the connector disposed inside the housing.

In the present invention, the housing includes an exterior plate having the opening, and the mounting plate is preferably located closer to the casing than the fan cover and inserted inside the exterior plate. In this way, the mounting plate can be inserted inside the exterior plate, and the fan unit can be tilted around the edge of the opening to connect the wiring to the connector. This improves workability when attaching and detaching the fan unit. In addition, because there is a step between the mounting plate and the fan cover, when the mounting plate is inserted inside the exterior plate, the step at the boundary between the back panel and the fan cover can be eliminated.

In the present invention, it is preferable that the opening faces the edge of the board, and a power supply connector connected to the wiring is disposed on the edge. In this way, the power supply connector can be easily accessed from the opening. Therefore, the fan wiring can be directly connected to the connector on the board without using an intermediate connector or the like. In addition, by driving the fan, a cooling air that flows along the board can be generated, providing a high cooling effect on the board.

In the present invention, the housing includes an exterior plate in which the openings are provided, and the openings include a first opening that is located closer to one edge of the exterior plate than the other edge of the exterior plate, and a second opening that is located closer to the one edge than the other edge, and it is preferable that the fan unit attached to the second opening is rotated 180° about an axis perpendicular to the fan cover with respect to the fan unit attached to the first opening. In this way, by shifting the position of the openings, it is possible to configure the cooling air to flow over a wide range, thereby improving the cooling effect. Also,
By mounting one of the two fan units rotated 180 degrees relative to the other, the position of the mounting plate and the position of the wiring passage can be optimized. For example, by arranging the mounting plates of the two fan units on opposite sides, the openings can be shifted more than when the mounting plates are arranged on the same side. This allows the cooling air to flow over a wide area. Also, the wiring for the two fan units can be routed close to each other, making the wiring work more efficient.

According to the present invention, the fan, fan cover, and mounting member are unitized, and the mounting member has a mounting plate portion that extends outward beyond the fan cover. In addition, a wiring passage is provided between the fan cover and the casing. In this way, if the fan, fan cover, and mounting member are unitized, and the fan wiring can be pulled out between the fan cover and the casing when assembling the fan unit, the work of attaching and detaching the fan to the housing is good and the labor hours are small. In other words, the entire fan unit can be tilted toward the opening with the mounting plate portion as the center, and the work of connecting the fan wiring to the power supply connector located inside the opening can be easily performed. In addition, after connecting the wiring, the fan unit can be tilted to close the opening, and the fixing work can be performed with screws or the like while visually checking the overlapping part of the mounting plate portion and the edge of the opening.

1 is an external perspective view of a controller to which the present invention is applied, as viewed from the rear side. FIG. 2 is an oblique view of the controller with the second case removed. FIG. 2 is an external perspective view showing a state in which a fan unit is removed from a housing. FIG. 4A and 4B are rear and side views of the fan unit. 13 is a cross-sectional view of a first fan unit and a housing arranged on the Y2 side. FIG. 13 is a cross-sectional view of a second fan unit and a housing arranged on the Y1 side. FIG.

Below, an embodiment of a controller to which the present invention is applied will be described with reference to the drawings. The controller 1 of this embodiment is a device that supplies power to a robot (manipulator) equipped with an actuator such as a motor.

Figure 1 is an external perspective view of a controller 1 to which the present invention is applied, as seen from the rear side. Figure 2 is an external perspective view of the controller with the second case 22 removed. Figure 3 is an external perspective view showing the state in which the fan unit has been removed from the housing. In this specification, the three directions XYZ are mutually orthogonal. For convenience, in this specification, the first direction Z is defined as the up-down direction of the controller 1. The Z1 direction is downward, and the Z2 direction is upward. The second direction X is the front-to-rear direction of the controller 1. The X1 direction is forward, and the X2 direction is backward. The third direction Y is the width direction of the controller 1. The Y1 direction and the Y2 direction are one side and the other side of the third direction Y. Note that in the actual manner in which the controller 1 is used, the first direction Z does not have to coincide with the up-down direction (vertical direction).

(Overall composition)
As shown in Fig. 1 and Fig. 2, the controller 1 includes a metal housing 2. The housing 2 is a rectangular parallelepiped, and includes a front plate 2a facing the X1 direction, a back plate 2b facing the X2 direction, a first side plate 2c facing the Y1 direction, a second side plate 2d facing the Y2 direction, a bottom plate 2e facing the Z1 direction, and a top plate 2f facing the Z2 direction. The front plate 2a, the back plate 2b, the first side plate 2c, the second side plate 2d, the bottom plate 2e, and the top plate 2f are exterior plates of the controller 1. In this embodiment, the members constituting the housing 2 include a first case 21 including the bottom plate 2e, the first side plate 2c, and the back plate 2b, a second case 22 including the top plate 2f and the second side plate 2d, a first interface panel 23 and a second interface panel 24 constituting the front plate 2a, and a housing frame 25.

As shown in FIG. 2, the housing frame 25 includes a rectangular front frame 26 to which the front panel 2a is fixed, a rectangular rear frame 27 to which the rear panel 2b is fixed, and a rectangular side frame 28 to which the second side panel 2d is fixed. The X1 end of the side frame 28 is fixed to the front frame 26, and the X2 end is fixed to the Y2 edge of the rear panel 2b.

As shown in Figures 2 and 3, the controller 1 includes a communication board unit (not shown) arranged inside the housing 2, a control circuit board 4, a drive circuit board unit 5, a drive power supply circuit board unit 6, and a power supply unit 7. The controller 1 also includes two fan units 8 attached to the rear plate 2b of the housing 2 in a line in the third direction Y, and a reinforcing member 9 that spans the inside of the housing 2 in the third direction Y and supports the top plate 2f from the bottom plate 2e side (Z1 side). The reinforcing member 9 is a beam member that spans between the power supply cover 10 fixed to the housing 2 and the side frame 28.

The communication board unit (not shown) is disposed on the rear side (X2 side) of the first interface panel 23. The communication board unit is a unit in which two communication boards and a board fixing panel are stacked in the first direction Z via a spacer. The multiple external connection connectors 34 mounted on the communication board unit are each disposed in a hole provided in the first interface panel 23 (see FIG. 1).

The drive power supply circuit board unit 6 and the drive circuit board unit 5 are arranged in this order on the rear side (X2 side) of the communication board unit. The drive power supply circuit board unit 6 is a unit in which two drive power supply circuit boards and a support plate are stacked in the first direction Z via spacers, and is fixed to the bottom plate 2e. Electronic elements such as a capacitor 64 are mounted on the drive power supply circuit board.

As shown in FIG. 2, the power supply unit 7 is disposed at the Y1 end of the housing 2. The power supply unit 7 is configured to be detachable from the housing 2, and can be removed in the X2 direction from an opening 20 provided at the Y1 end of the back panel 2b. The power supply unit 7 is a long and slender unit that extends from the back panel 2b to the rear side of the external power connector 70 disposed at the Y1 end of the second interface panel 24. The middle portion of the power supply unit 7 in the second direction X is disposed inside the power supply cover 10 fixed to the housing 2.

As shown in FIG. 2, a fuse 11 connected to an external power connector 70 is disposed on the Z2 side of the power supply cover 10. The fuse 11 is connected to a noise filter 12 disposed adjacent to the power supply cover 10 in the Y2 direction. The noise filter 12 includes a filter circuit for removing noise superimposed on the AC current supplied from the external power connector 70 via the fuse 11.

The AC current output from the noise filter 12 is distributed to the drive power supply circuit board unit 6 and the power supply unit 7. The power supply unit 7 converts the AC current distributed from the noise filter 12 into a DC current of 5 V and a DC current of 24 V, and supplies them to the control circuit board 4 (see FIG. 3) fixed to the bottom plate 2e of the housing 2. The DC current of 24 V is supplied to the fan unit 8 via the control circuit board 4. The power supply unit 7 also converts the AC current into a DC current of 15 V, and supplies it to the drive power supply circuit board unit 6. The drive power supply circuit board unit 6 converts the AC current distributed from the noise filter 12 into a drive current (DC current) of a different voltage than the supply voltage from the power supply unit 7, and supplies it to the drive circuit board unit 5.

2, the drive circuit board unit 5 includes four drive circuit boards 51 arranged at regular intervals in the third direction Y, a heat dissipation member 52 fixed to each drive circuit board 51, and a board holder 53. A power module such as an IGBT module is mounted on the drive circuit board 51. The heat dissipation member 52 is attached so as to contact or face the power module, and includes fins extending in the second direction X. The board holder 53 is fixed to the bottom plate 2e of the housing 2. The four drive circuit boards 51 are held in a position parallel to the XZ plane by the board holder 53, and face two fan units 8 attached to the back plate 2b of the housing 2 in the second direction X. Therefore, when the two fan units 8 are driven, air is blown into the gaps between the drive circuit boards 51, cooling the drive circuit boards 51 and the heat dissipation member 52.

The reinforcing member 9 arranged on the X1 side of the drive circuit board unit 5 has a number of ventilation holes 93. The reinforcing member 9 faces the fan unit 8 attached to the rear plate 2b and the ventilation holes 2i provided in the front plate 2a. Therefore, when the fan unit 8 is driven, the external air (cooling air) taken into the housing 2 from the ventilation holes 2i is blown through the ventilation holes 93 and the space on the Z1 side of the reinforcing member 9 to the drive circuit board unit 5, passes through the gap between the drive circuit board 51 and the heat dissipation member 52, and is exhausted to the outside of the housing 2 via the fan unit 8.

As shown in FIG. 3, the control circuit board 4 is arranged on the bottom of the housing 2 so as to be parallel to the bottom plate 2e. The control circuit board 4 is screwed to the tip of a stepped pin 2g protruding from the bottom plate 2e in the Z2 direction. Above the control circuit board 4 (Z2 direction), a drive circuit board 51 is arranged in a vertical position relative to the control circuit board 4. The drive circuit board 51 is connected to the control circuit board 4 via a connector that fits in the first direction Z. One of the two fan units 8 (first fan unit 8A described later) is arranged at a position offset to the edge of the Z1 side of the back plate 2b, and faces the control circuit board 4 fixed to the bottom plate 2e in the second direction X. Therefore, when the fan unit 8 is driven, air is blown to the control circuit board 4, and the electronic elements mounted on the control circuit board 4 are cooled.

As shown in FIG. 2, an output connector 56 is disposed at the end on the X1 side of each drive circuit board 51. Wiring 57 connected to the output connector 56 is passed through a noise removal ring 58, pulled out to the X1 side from a wiring hole provided in the reinforcing member 9, and connected to an external output connector 59 provided on the second interface panel 24. When the connector on the manipulator side is connected to the external output connector 59, power is supplied from the controller 1 to the manipulator.

(Fan unit)
1 and 3, the rear panel 2b has two openings 80 aligned in the third direction Y. In the following description, the opening 80 on the Y2 side is referred to as a first opening 80A, and the opening 80 on the Y1 side is referred to as a second opening 80B. Fan units 8 of the same configuration are attached to the first opening 80A and the second opening 80B. In the following description, the fan unit 8 arranged in the first opening 80A is referred to as a first fan unit 8A, and the fan unit 8 arranged in the second opening 80B is referred to as a second fan unit 8B.

The first opening 80A and the second opening 80B are misaligned in the Z direction. The first opening 80A is provided at a position offset toward the edge of the Z1 side of the rear panel 2b. The second opening 80B is provided at a position offset toward the edge of the Z2 side of the rear panel 2b. As shown in FIG. 3, a fixing hole 81A for fixing the first fan unit 8A is provided at the edge of the Z2 side of the first opening 80A. In addition, a fixing hole 81B for fixing the second fan unit 8B is provided at the edge of the Z1 side of the second opening 80B.

As shown in FIG. 3, a control circuit board 4 intersecting with the back plate 2b and a drive circuit board 51 intersecting with the back plate 2b and the control circuit board 4 are arranged on the inside of the back plate 2b. A connector 82 for supplying power to the fan unit 8 is arranged on the X2 side edge of the control circuit board 4 extending in the third direction Y. In this embodiment, the connector 82 includes a first connector 82A for supplying power to the first fan unit 8A and a second connector 82B for supplying power to the second fan unit 8B.

Figure 4 is an exploded perspective view of the fan unit 8. Figure 5(a) is a plan view of the fan unit 8, and Figure 5(b) is a side view of the fan unit 8. The XYZ directions shown in Figures 4 and 5 are the directions when the fan unit 8 is attached to the second opening 80B. The fan unit 8 includes a fan 85 having an impeller 83 and a casing 84, a fan cover 86 that abuts against the casing 84 from the X2 side, an attachment member 87 that abuts against the casing 84 from the X1 side, and fixing members (not shown) such as bolts that fix the fan cover 86 and the attachment member 87 to the casing 84.

As shown in FIG. 4, the casing 84 includes an outer plate 84a that abuts against the fan cover 86, an inner plate 84b that is parallel to the outer plate 84a, and a body portion 84c that connects the outer plate 84a and the inner plate 84b and surrounds the impeller 83. The casing 84 is rectangular when viewed from the second direction X. The casing 84 includes through holes 84d that penetrate four corners in the second direction X. Two of the four through holes 84d are used to fix the fan cover 86 and the mounting member 87 to the casing 84.

As shown in Figures 4 and 5, the mounting member 87 is a plate with a Z-shaped cross section, which includes a side plate portion 87a that is parallel to the XY plane and elongated in the third direction Y, a support plate portion 87b that extends in the Z2 direction from the X1 side edge of the side plate portion 87a, and a mounting plate portion 87c that extends in the Z1 direction (i.e., the opposite side to the support plate portion 87b) from the X2 side edge of the side plate portion 87a. The support plate portion 87b abuts against the inner plate 84b of the casing 84 from the X1 side. Two through holes 87d provided in the support plate portion 87b overlap with the through holes 84d of the casing 84. In addition, fixing holes 87e are provided at both ends of the mounting plate portion 87c in the third direction Y for fixing the fan unit 8 to the back plate 2b.

The fan cover 86 has a flat plate portion 86a that abuts against the outer plate 84a of the casing 84. The flat plate portion 86a has a number of ventilation holes. As shown in FIG. 5(b), a first edge portion 86b, which is the edge portion on the Y2 side of the flat plate portion 86a, has an extension portion 86c that extends outward from the casing 84. In addition, a second edge portion 86d, which is the edge portion on the Z1 side of the flat plate portion 86a, has two through holes 86f that overlap with the through holes 84d of the casing 84. When the fan unit 8 is assembled, the mounting plate portion 87c is disposed on the outer periphery (Z1 side) of the second edge portion 86d.

The fan cover 86 has a bent plate portion 86e that is bent at a right angle from the tip of the extension portion 86c toward the X1 side. As shown in FIG. 5(a), the extension portion 86c and the bent plate portion 86e form a wiring passage 89 that extends in the first direction Z along the side surface on the Y2 side of the casing 84. The wiring passage 89 extends to the corner where the first edge portion 86b and the second edge portion 86d of the fan cover 86 intersect. The casing 84 has a wiring groove 90 provided in the outer plate 84a and a wiring holder 91 provided on the edge of the inner plate 84b. The wiring groove 90 extends to the edge of the outer plate 84a and is connected to the wiring passage 89. The wiring 92 of the fan 85 drawn out from the casing 84 is drawn out from the wiring groove 90 to the wiring passage 89, held by the wiring holder 91, and drawn out from the fan unit 8 in the X1 direction.

6 is a cross-sectional view of the first fan unit 8A arranged on the Y2 side and the housing 2, taken along the line A-A in FIG. 1. FIG. 7 is a cross-sectional view of the second fan unit 8A arranged on the Y1 side and the housing 2.
3 and 6, the mounting posture of the first fan unit 8A is a posture in which the mounting plate portion 87c extends on the Z2 side of the fan cover 86. The mounting plate portion 87c is inserted into the inside of the edge on the Z2 side of the first opening 80A and is fixed to the back plate 2b by a fixing member 88 (see FIG. 6) such as a bolt.

As shown in FIG. 3, the first opening 80A is positioned toward the edge of the Z1 side of the back plate 2b, so that the first fan unit 8A attached to the first opening 80A faces the edge of the control circuit board 4 fixed to the bottom plate 2e. When attaching or detaching the first fan unit 8A to or from the housing 2, the mounting plate portion 87c is inserted inside the edge of the Z2 side of the back plate 2b, and the first fan unit 8A is tilted in the direction of arrow C1 in FIG. 6. This allows access to the first connector 82A located on the edge of the control circuit board 4, so that the wiring 92 of the first fan unit 8A can be connected to the first connector 82A.

In this embodiment, the orientation of the same fan unit 8 is changed to optimize the posture of the fan unit 8 according to the position of the opening 80. As shown in Figs. 3 and 7, the mounting posture of the second fan unit 8B is a posture in which the mounting plate portion 87c extends toward the Z1 side of the fan cover 86. In other words, the mounting posture of the second fan unit 8B is a posture in which the first fan unit 8A is rotated 180 degrees around an axis perpendicular to the fan cover 86. The mounting plate portion 87c of the second fan unit 8B is inserted inside the edge on the Z1 side of the second opening 80B and is fixed to the back plate 2b by a fixing member 88 (see Fig. 7) such as a bolt.

3 and 7, the second opening 80B is provided at a position offset toward the edge of the Z2 side of the rear panel 2b. Therefore, since the second fan unit 8B does not face the control circuit board 4, it is difficult to access the second connector 82B from the second opening 80B. Therefore, the installation work of the second fan unit 8B is performed in a state in which the first fan unit 8A is not installed. When attaching or detaching the second fan unit 8B to the housing 2, the mounting plate portion 87c is inserted into the edge of the Z1 side of the second opening 80, and the second fan unit 8B is tilted in the direction of the arrow C2 in FIG. 7. Then, the wiring of the second fan unit 8B is extended from the second opening 80B to the inside of the housing 2, and the second connector 82B is accessed from the first opening 80A to connect the wiring 92.

As shown in FIG. 3, in the mounting position of the second fan unit 8B, the wiring passage 89 formed by the extension portion 86c and the bent plate portion 86e of the fan cover 86 is disposed at the end of the second fan unit 8B on the Y2 side (i.e., the first opening 80A side). Therefore, the wiring 92 of the second fan unit 8B can be pulled out to a position close to the first opening 80A, and the wiring 92 of the second fan unit 8B can be easily connected to the second connector 82B from the first opening 80A.

As shown in Figures 6 and 7, the mounting plate portions 87c of the first fan unit 8A and the second fan unit 8B are located on the same plane as the outer plate 84a of the casing 84, and are positioned further back than the fan cover 86 toward the X1 side (i.e., toward the casing 84). In this embodiment, the step in the second direction X between the fan cover 86 and the mounting plate portions 87c matches the plate thickness of the back plate 2b. Therefore, when the first fan unit 8A and the second fan unit 8B are fixed to the housing 2, the fan cover 86 and the back plate 2b are located on the same plane, and no step occurs at the boundary between the fan cover 86 and the back plate 2b.

(Main effects of this embodiment)
As described above, the controller 1 of the present invention includes the housing 2, the fan unit 8 detachably attached to the opening 80 of the housing 2, and the control circuit board 4 housed in the housing 2. The fan unit 8 includes a fan 85 including an impeller 83 and a casing 84, a fan cover 86 that abuts against the casing 84, and an attachment member 87 that abuts against the casing 84 from the side opposite to the fan cover 86. The attachment member 87 includes an attachment plate portion 87c that extends outside the fan cover 86 when viewed from the direction facing the fan cover 86 (X2 direction) and is fixed to the edge of the opening 80. The fan cover 86 also includes an extension portion 86c that extends outside the casing 84 and a bent plate portion 86e that bends from the tip of the extension portion 86c toward the casing 84 side (X1 side), and the wiring 92 of the fan 85 is arranged in a wiring passage 89 between the bent plate portion 86e and the casing 84.

In this embodiment, the fan unit 8 is a unit in which the fan 85, the fan cover 86, and the mounting member 87 are preassembled, and a wiring passage 89 is provided between the fan cover 86 and the casing 84 of the fan 85 through which the wiring 92 of the fan 85 can be drawn, so that the work of attaching and detaching the fan to and from the housing 2 is easy and the number of steps is small. For example, the entire fan unit 8 can be tilted toward the opening 80 around the mounting plate portion 87c, and the wiring 92 of the fan 85 can be easily connected to the power supply connector 82 arranged inside the opening 80. After connecting the wiring 92, the fixing work can be easily performed with screws or the like while visually checking the overlapping portion of the mounting plate portion 87c and the edge of the opening 80.

In this embodiment, the fan cover 86 and the casing 84 are rectangular when viewed from the second direction X. The fan cover 86 has a first edge 86b provided with an extension 86c that constitutes a wiring passage 89, and a second edge 86d that intersects with the first edge 86b, and the mounting plate 87c extends to the outside of the second edge 86d. Since the wiring passage 89 extends to the corner where the first edge 86b and the second edge 86d intersect, when assembling the fan unit 8, the wiring 92 can be drawn out from the wiring passage 89 to the vicinity of the mounting plate 87c provided on the second edge 86d. Therefore, since the wiring 92 can be drawn out near the power supply connector 82 that is arranged inside the opening 80, the work of connecting the wiring 92 to the connector 82 is easy.

In this embodiment, the casing 84 is provided with a wiring groove 90 that is connected to the wiring passage 89. Therefore, the wiring 92 can be arranged in the wiring groove 90 to assemble the fan unit 8, so that the wiring 92 of the fan 85 can be easily drawn out to the wiring passage 89. For example, when the casing 84 includes an outer plate 84a against which the fan cover 86 abuts, an inner plate 84b against which the mounting member 87 abuts, and a body portion 84c that connects the outer plate 84a and the inner plate 84b and surrounds the impeller 83, the wiring groove 90 can be provided in the outer plate 84a. In addition, a wiring holder 91 is provided on the edge of the inner plate 84b. Therefore, the wiring 92 that has been turned so as to face the inside (X1 side) of the housing 2 can be held by the wiring holder 91, so that the workability when connecting the wiring 92 to the connector 82 arranged in the housing 2 is good.

In this embodiment, the housing 2 has a rear plate 2b, which is an exterior plate with an opening 80, and the mounting plate 87c of the fan unit 8 is inserted inside the rear plate 2b. Therefore, with the mounting plate 87c hooked onto the rear plate 2b, the fan unit 8 can be tilted around the edge of the opening 80 to connect the wiring 92 to the connector 82. This improves the workability when attaching and detaching the fan unit 8. In addition, the mounting plate 87c is positioned further back toward the casing 84 than the fan cover 86, and there is a step between the mounting plate 87c and the fan cover 86, so that when the mounting plate 87c is inserted inside the rear plate 2b, the step at the boundary between the rear plate 2b and the fan cover 86 can be eliminated.

In this embodiment, the control circuit board 4 faces the back plate 2b, an opening 80 provided in the back plate 2b faces the edge of the control circuit board 4, and a power supply connector 82 connected to wiring 92 is disposed on the edge of the control circuit board 4. Therefore, since the power supply connector 82 is easily accessible from the opening 80, the power supply connector 82 can be directly connected to the connector 82 on the control circuit board 4 without using a relay connector or the like.
A wiring 92 of the fan 85 can be connected to the fan 85. In addition, by driving the fan 85, a cooling air flow can be generated that flows along the board, so that the cooling effect on the control circuit board 4 is high.

In this embodiment, the opening 80 in which the fan unit 8 is arranged includes a first opening 80A arranged at a position closer to the edge on the Z1 side than the edge on the Z2 side of the back plate 2b, and a second opening 80B arranged at a position closer to the edge on the Z2 side than the edge on the Z1 side. The second fan unit 8B attached to the second opening 80B is rotated 180° around an axis perpendicular to the fan cover 86 with respect to the first fan unit 8A attached to the first opening 80A. In this way, by shifting the positions of the first opening 80A and the second opening 80B, it is possible to configure the cooling air to flow over a wide range, thereby improving the cooling effect. In addition, even if the positions of the first opening 80A and the second opening 80B are shifted, the position of the mounting plate portion 87c and the position of the wiring passage 89 can be optimized by rotating two fan units 8 of the same configuration by 180 degrees and attaching them. That is, by arranging the mounting plate portions 87c of the two fan units 8 on opposite sides in the first direction Z, the first opening 80A and the second opening 80B can be arranged with a greater offset in the first direction Z than when the mounting plate portions 87c are arranged on the same side. This allows the cooling air to flow over a wide range. Also, the wiring 92 of the two fan units 8 can be routed in close positions, making the wiring work more efficient.

1...controller, 2...housing, 2a...front panel, 2b...rear panel, 2c...first side panel, 2d...second side panel, 2e...bottom panel, 2f...top panel, 2g...step pin, 2i...ventilation hole, 4...control circuit board, 5...drive circuit board unit, 6...drive power supply circuit board unit, 7...power supply unit, 8...fan unit, 8A...first fan unit, 8B...second fan unit, 9...reinforcing member, 10...power supply cover, 11...fuse, 12...noise filter, 21...first case, 22...second case, 23...first interface panel, 24...second interface panel, 25...housing frame, 26...front frame, 27...rear frame, 28...side frame, 34...external connection connector, 51...drive circuit board, 52...heat dissipation member, 53...board holder, 56...output connector, 57...wiring, 58...noise Removal ring, 59...external output connector, 64...condenser, 70...external power connector, 80...opening, 80A...first opening, 80B...second opening, 81A...fixing hole, 81B...fixing hole, 82...connector, 82A...first connector, 82B...second connector, 83...impeller, 84...casing, 84a...outer plate, 84b...inner plate, 84c...body, 84d...through hole, 85...fan, 86...fan cover, 86a...flat plate portion, 86b...first edge portion, 86c...extending portion, 86d...second edge portion, 86e...bent plate portion, 86f...through hole, 87...mounting member, 87a...side plate portion, 87b...support plate portion, 87c...mounting plate portion, 87d...through hole, 87e...fixing hole, 88...fixing member, 89...wiring passage, 90...wiring groove, 91...wiring holding portion, 92...wiring, 93...ventilation hole, X...second direction, Y...third direction, Z...first direction

Claims (7)

The electronic device includes a housing, a fan unit that is detachably attached to an opening of the housing, and a board that is accommodated in the housing;
the fan unit includes a fan having an impeller and a casing, a fan cover in contact with the casing, and a mounting member in contact with the casing from a side opposite to the fan cover;
the mounting member includes a mounting plate portion that extends outward from the fan cover when viewed from a direction facing the fan cover and is fixed to an edge of the opening,
The fan cover includes a first edge portion having an extension portion extending outward from the casing, and a bent plate portion bent from a tip of the extension portion toward the casing,
A controller characterized in that the bent plate portion and the extension portion form a wiring passage extending in a direction along the first edge portion along the side of the casing, and wiring for the fan is arranged in the wiring passage. the fan cover and the casing are rectangular;
The fan cover has a second edge portion intersecting the first edge portion, and the mounting plate portion extends outward from the second edge portion.
The controller of claim 1 , wherein the wire passage extends to a corner where the first edge and the second edge intersect. The controller according to claim 1 or 2, characterized in that the casing is provided with a wiring groove that connects to the wiring passage. the casing includes an outer plate against which the fan cover abuts, an inner plate against which the mounting member abuts, and a body portion that connects the outer plate and the inner plate and surrounds the impeller,
4. The controller according to claim 1, wherein a wiring holder is provided on an edge of the inner plate. the housing includes an exterior plate having the opening,
The controller according to claim 1 , wherein the mounting plate portion is located closer to the casing than the fan cover is, and is inserted inside the exterior plate. the opening faces an edge of the substrate;
6. The controller according to claim 1, wherein a power supply connector connected to the wiring is disposed on the edge. the housing includes an exterior plate having the opening,
The opening includes a first opening arranged at a position closer to the other edge of the exterior plate than the one edge of the exterior plate, and a second opening arranged at a position closer to the one edge than the other edge,
A controller as described in any one of claims 1 to 6, characterized in that the fan unit attached to the second opening is in an orientation rotated 180 degrees around an axis perpendicular to the fan cover relative to the fan unit attached to the first opening.

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