JP6615630B2 - Electrical equipment - Google Patents

Description

  The present invention relates to electrical equipment such as a power supply device, and more particularly to a cooling structure for electrical equipment.

  There are many electrical devices in which a first electronic circuit that requires protection by sealing (protection from foreign matter such as dust) is built in a housing (see, for example, Patent Document 1). Such an electric device has a cooling structure for cooling the first electronic circuit. Specifically, an intake port and an exhaust port are provided in the housing, and the housing has a first chamber in which a flow path for flowing air sucked from the intake port to the exhaust port is formed, and the first chamber And a second chamber disposed adjacent to the first chamber via a partition wall. The second chamber is sealed, and the first electronic circuit is installed in the second chamber. Also, fins for cooling the second chamber by heat exchange with the air flowing through the flow path are installed in the first chamber.

  In the electrical equipment described above, a second electronic circuit that does not require protection from foreign matters such as dust as much as the first electronic circuit (that is, does not require sealing) but requires appropriate cooling is built in the housing. There may be. In this case, the second electronic circuit is cooled as follows. As an example, the second electronic circuit is installed in the first chamber, and is cooled by outside air (that is, air flowing through the flow path) directly sucked into the first chamber from the intake port. As another example, the second electronic circuit is installed in a separate room provided in the housing, and is cooled by outside air directly drawn into the separate room from another intake port.

JP2015-133345A

  However, in the above-described electrical apparatus, a large amount of outside air is directly blown onto the second electronic circuit. For this reason, although the second electronic circuit is efficiently cooled, there is a concern that the following problems may occur. That is, when a substance that adversely affects the electronic circuit is contained in the outside air, if the outside air is blown directly and in large quantities on the second electronic circuit, the second electronic circuit is likely to be adversely affected. As a result, there is a risk of failure of the electrical equipment.

  Therefore, an object of the present invention is to efficiently cool the inside of the housing in an electric device that cools the inside of the housing using outside air, and to suppress adverse effects that the outside air can cause.

  The electrical device according to the present invention includes a housing having an intake port and an exhaust port. The housing includes a first chamber in which a main flow path for flowing air sucked from the intake port to the exhaust port is formed, a second chamber disposed adjacent to the first chamber via the first partition wall, and a second chamber A third chamber disposed adjacent to the first chamber via a second partition wall at a position opposite to the chamber, and the second chamber is hermetically sealed. The second partition wall is provided with a first vent hole that leads to the third chamber. With such a configuration, the electrical device is formed with a first sub-flow channel that allows a part of the air sucked from the air inlet to flow into the third chamber through the first vent.

  According to the electric device, the third chamber can be cooled using a part of the air sucked from the air inlet. In addition, since a part of the air sucked from the intake port flows into the third chamber from the first chamber through the first vent port, an appropriate amount of air that can suppress an adverse effect on the electrical equipment is supplied to the third chamber. Will be sent.

  According to the electric apparatus according to the present invention, the inside of the housing can be efficiently cooled, and adverse effects that can be caused by outside air can be suppressed.

It is the perspective view which showed the power supply device which is embodiment of this invention seeing from each of (a) front side and (b) back side. It is the cross-sectional view which showed partially the internal structure of the power supply device. It is the fracture | rupture perspective view which showed the part of the inlet port vicinity of a power supply device. It is the fracture | rupture perspective view which showed the part of the exhaust port vicinity among power supply devices. It is the cross-sectional view which showed partially the internal structure of the power supply device which concerns on a modification. It is a perspective view showing an example of a power supply system constructed by stacking a plurality of power supply devices. It is the longitudinal cross-sectional view which showed the power supply system partially.

  An embodiment in which the present invention is applied to a power supply apparatus will be specifically described with reference to the drawings. 1A and 1B are perspective views showing a power supply device according to an embodiment of the present invention as viewed from the front side and the back side. As shown in FIGS. 1A and 1B, the power supply device includes a housing 1 having an intake port 1a and an exhaust port 1b. The casing 1 includes a front wall 10A, a rear wall 10B, left and right side walls 10C and 10D, a top wall 10E, and a bottom wall 10F as box-shaped outer walls.

  FIG. 2 is a cross-sectional view partially showing the internal configuration of the power supply apparatus. As shown in FIG. 2, a first chamber 11, a second chamber 12, and a third chamber 13 are formed in the housing 1.

  Specifically, a first partition wall 14A and a second partition wall 14B extending from the front wall 10A to the rear wall 10B are erected on the inner surface of the bottom wall 10F so as to face each other. All the ceilings of the first chamber 11 to the third chamber 13 are constituted by the top wall 10E, and all the floors of the first chamber 11 to the third chamber 13 are constituted by the bottom wall 10F. More specifically, it is as follows.

  The intake port 1 a is formed in the front wall 10 </ b> A and is disposed at a position where the outside air can be directly sucked into the first chamber 11. In the present embodiment, a cover 8 having a plurality of slits is attached to the intake port 1a (see FIG. 1A).

  The exhaust port 1b is formed in the rear wall 10B, and is disposed at a position where the air in the first chamber 11 can be directly discharged to the outside. In the present embodiment, the exhaust port 1b is composed of a plurality of through holes formed in the rear wall 10B.

  As will be described later, in the first chamber 11, the distance from the first partition wall 14A to the second partition wall 14B in the direction D1 along the front wall 10A (or the rear wall 10B) is a distance in a region close to the front wall 10A. L1 is set to be larger than the distance L2 in the region near the rear wall 10B (L1> L2). The intake port 1a is formed to have a larger lateral width (full width in the direction D1) than the exhaust port 1b.

  The first chamber 11 is surrounded by the top wall 10E, the bottom wall 10F, the first partition wall 14A, and the second partition wall 14B, and these walls exhaust air sucked from the intake port 1a. A main flow path 21 is formed to flow to the mouth 1b.

  As shown in FIG. 2, the power supply device further includes a fan 3, a first fin 51, and a second fin 52, which are installed in the first chamber 11. Here, the fan 3 is installed in a position in the first chamber 11 and in the vicinity of the intake port 1a, and sucks air into the first chamber 11 from the intake port 1a. Note that the fan 3 may be installed at another position in the first chamber 11 or outside the housing 1 as long as air can be sucked into the first chamber 11 from the intake port 1a. It may be installed at a position.

  The air sucked from the air inlet 1 a by driving the fan 3 passes through the first fin 51 and the second fin 52. As the air flows in the first chamber 11 in this manner, the circuits, components, and the like in the housing 1 are cooled directly or indirectly through the first fins 51 and the second fins 52. As a target to be indirectly cooled, as will be described later, a main circuit 41 attached to the first fin 51 in the second chamber 12, and a circuit or component attached to the second fin 52 in the third chamber 13. Etc. Details of the first fin 51 and the second fin 52 will be described later.

  The second chamber 12 is surrounded by a wall excluding the side wall 10D of the outer wall constituting the housing 1 and the first partition wall 14A, and is sealed by these walls. That is, the second chamber 12 is disposed adjacent to the first chamber 11 via the first partition wall 14A and is sealed. Therefore, the second chamber 12 has a dustproof performance.

  The third chamber 13 is surrounded by a wall excluding the side wall 10C of the outer wall constituting the housing 1 and the second partition wall 14B. That is, the third chamber 13 is disposed adjacent to the first chamber 11 via the second partition wall 14B at a position opposite to the second chamber 12.

  FIG. 3 is a cutaway perspective view showing a portion in the vicinity of the air inlet 1a in the power supply device. FIG. 4 is a cutaway perspective view showing a portion near the exhaust port 1b in the power supply device. 3 and 4, the illustration of the fan 3, the power supply circuit, the first fin 51, and the second fin 52 (see FIG. 2) is selectively omitted. As shown in FIG. 2 to FIG. 4, the second partition wall 14 </ b> B has a stepped portion 150 protruding from the first chamber 11 toward the third chamber 13 and a first portion extending from the stepped portion 150 to the front wall 10 </ b> A. The flat part 151 and the 2nd flat part 152 extended from the level | step-difference part 150 to the rear wall 10B are formed.

  As shown in FIG. 2, the first flat portion 151 is disposed substantially parallel to the first partition wall 14A, and the distance L1 from the first partition wall 14A in the direction D1 is equal to the lateral width of the intake port 1a. They are arranged at substantially the same position or larger. The second flat portion 152 is disposed substantially parallel to the first partition wall 14A, and the distance L2 from the first partition wall 14A in the direction D1 is substantially the same as or greater than the lateral width of the exhaust port 1b. Arranged in position. The first flat portion 151 and the second flat portion 152 are arranged such that the distance L1 is larger than the distance L2, and are connected to each other through the step portion 150.

  Therefore, a region (region from the front wall 10 </ b> A to the stepped portion 150) in the first chamber 11 that is close to the intake port 1 a is approaching the third chamber 13. As described above, the stepped portion 150 is formed in the first chamber 11 so that the region close to the intake port 1a is wider than the region close to the exhaust port 1b. Note that the step 150 may be formed so as to be substantially perpendicular to the first flat portion 151 and the second flat portion 152, or formed so as to be inclined from such a posture. May be. In the present embodiment, the latter posture is employed (see FIGS. 2 and 3). As an example, the stepped portion 150 is formed by bending and deforming a flat plate constituting the second partition wall 14B in a crank shape.

  The intake port 1a is formed so as to partially overlap the third chamber 13 when the power supply device is viewed from the front wall 10A (that is, in front view). More specifically, in a front view, positions where the first partition wall 14A, the second flat portion 152, and the first flat portion 151 overlap the front wall 10A are positions P1, P2, and P3 (see FIG. 2), respectively. Then, the intake port 1a extends from the position P1 or the vicinity thereof to the position P3 or the vicinity thereof beyond the position P2.

  As shown in FIGS. 2 and 3, the step portion 150 is provided with a first vent 6 a that leads to the third chamber 13. As a result, a first sub-flow path 22 is formed in the housing 1 for allowing a portion of the air sucked from the air inlet 1a to flow into the third chamber 13 through the first vent 6a (FIG. 2). reference). Here, as described above, the air inlet 1a is formed so as to partially overlap the third chamber 13 in a front view. Therefore, it is possible to partially allow the air sucked from the intake port 1 a to flow into the third chamber 13.

  In the present embodiment, the first vent 6a is configured by one rectangular opening. The amount of air sent into the third chamber 13 can be adjusted by adjusting the opening area of the first vent 6a. In addition, the structure of the 1st ventilation hole 6a is not limited to this, A various deformation | transformation is possible. As an example, the 1st ventilation hole 6a may be comprised from the some opening (for example, rectangular opening) distribute | arranged to the vertical or horizontal one line or several rows. Further, by adjusting not only the opening area but also the shape and arrangement (arrangement of the opening) of the first vent 6a, the amount of air fed into the third chamber 13 can be adjusted.

  In the present embodiment, the first vent 6a is expanded from the stepped portion 150 to the second flat portion 152 (see FIGS. 2 and 3). As a result, a first winding 40 </ b> A, which will be described later, can be passed through the first vent 6 a and disposed from the first chamber 11 to the third chamber 13.

  As shown in FIGS. 2 and 4, in the second flat portion 152, the air flowing through the first auxiliary flow path 22 in the third chamber 13 is returned to the first chamber 11 at a position close to the exhaust port 1 b. A second vent 6b is provided. In the present embodiment, the second vent 6b is provided in the second flat portion 152 at a position close to the rear wall 10B. The air flowing through the first sub-channel 22 in the third chamber 13 is guided to the exhaust port 1b through the second vent 6b, and is discharged from the exhaust port 1b together with the air flowing through the main channel 21.

  Further, as shown in FIGS. 2 and 3, a portion of the bottom wall 10 </ b> F that is in contact with the main channel 21 (that is, a portion constituting the first chamber 11) communicates with the outside of the housing 1. Three vents 6c are provided. As a result, the housing 1 is provided with a second sub-flow channel 23 that guides part of the air sucked from the air inlet 1a to the outside (below the housing 1) through the third vent 6c. (See FIGS. 2 and 7). As an example, the third vent 6c is formed by cutting and raising a part of the bottom wall 10F.

  In the present embodiment, the third vent 6c is formed at a position close to the intake port 1a. The third vent 6c extends substantially in parallel to the fan 3 in the direction substantially the same as the width direction of the fan 3 (in the present embodiment, the direction substantially the same as the direction D1), and in plan view (see FIG. 2). The entirety is formed to face the fan 3. Note that the third vent 6c may be arranged so that the entirety of the third vent 6c faces the intake port 1a. Further, the third vent 6c may be formed at a position away from the intake port 1a as long as it is a part of the bottom wall 10F in contact with the main flow path 21.

  As shown in FIG. 2, the power supply device further includes a power supply circuit constructed in the housing 1. The power supply circuit includes a first winding 40A, a second winding 40B, a main circuit 41, an input / output circuit 42, and a control circuit (not shown). The first winding 40 </ b> A is passed through the first vent 6 a and is disposed from the first chamber 11 to the third chamber 13. Therefore, the first winding 40A is arranged from the first chamber 11 to the third chamber 13 at a position close to the front wall 10A. The second winding 40B is arranged in a state facing the exhaust port 1b at a position close to the rear wall 10B in the first chamber 11. The main circuit 41 is disposed in the sealed second chamber 12. The input / output circuit 42 is disposed in the third chamber 13. Note that the components of the main circuit 41 and the input / output circuit 42 are partially omitted. A control circuit (not shown) is arranged with the main circuit 41 in the sealed second chamber 12.

  The main circuit 41 includes a smoothing circuit, a converter circuit, and the like, and these circuits include many precision components that require protection from foreign matters such as dust, such as the switch element 411. Therefore, the main circuit 41 is disposed in the second chamber 12 which is sealed and has dustproof performance. Further, when the main circuit 41 operates, the switch element 411 mainly generates heat. For this reason, the main circuit 41 requires cooling. Therefore, the power supply device has the following configuration.

  As shown in FIG. 2, a first opening 71 is formed in the first partition wall 14 </ b> A, and the first fin 51 has a flat surface on the first partition wall so as to close the first opening 71 without a gap. It is installed in the first chamber 11 in close contact with 14A. That is, the first fins 51 are tightly fixed to the surface of the first partition wall 14A on the first chamber 11 side. Therefore, in the second chamber 12, the state in which the inside is shut off from the outside air (sealed state) is maintained by the first partition wall 14A and the first fins 51 (mainly flat surfaces). That is, the first fin 51 bears a part of the structure that seals the second chamber 12.

  The first fin 51 cools the inside of the second chamber 12 by heat exchange with air flowing through the main flow path 21. Specifically, the switch element 411 (main heat generation source) is directly applied to a portion exposed from the first opening 71 in the flat surface of the first fin 51 (the surface in close contact with the first partition wall 14A). It is fixed to. Therefore, the switch element 411 is cooled through the first fin 51 as a main cooling target. When the first partition wall 14A has thermal conductivity, the inside of the second chamber 12 can be cooled via the first partition wall 14A without the first opening 71. In this case, the first fin 51 is brought into close contact with the surface of the first partition wall 14A on the first chamber 11 side, and the precision component such as the switch element 411 is disposed on the surface of the first partition wall 14A on the second chamber 12 side. It is preferable that a substrate on which the main circuit 41 or the like is mounted is in close contact.

  The input / output circuit 42 includes an input / output terminal 421, wiring 422 in the power supply circuit, and the like. And the input / output terminal 421 is drawn out from the part which comprises the 3rd chamber 13 among the back walls 10B. The wiring 422 is responsible for connection between components and circuits necessary for construction of the power supply circuit. The input / output circuit 42 does not require protection from foreign matters such as dust as much as the main circuit 41, but requires appropriate cooling. Therefore, the input / output circuit 42 is arranged in the third chamber 13 and the power supply device further has the following configuration.

  As shown in FIGS. 2 to 4, a second opening 72 is formed in the second flat portion 152 of the second partition wall 14 </ b> B, and the second opening 72 is to be closed (a gap is partially generated). Alternatively, the second fin 52 is installed in the first chamber 11 with the flat surface thereof being in close contact with the second flat portion 152. In other words, the second fin 52 is tightly fixed to the surface of the second flat portion 152 on the first chamber 11 side. On the other hand, the length and installation position of the second fin 52 are determined so as not to block the first vent 6a and the second vent 6b. In other words, the first vent 6a is disposed closer to the intake port 1a than the second fin 52, and the second vent 6b is disposed closer to the exhaust port 1b than the second fin 52. Therefore, the flow of air entering the third chamber 13 is not hindered by the second fins 52. Further, most of the air flowing through the first sub-channel 22 is guided to the second vent 6b without leaking from the second opening 72. That is, the second fin 52 bears a part of the structure that forms the first sub-channel 22.

  The second fin 52 cools the inside of the third chamber 13 by heat exchange with the air flowing through the main flow path 21. Specifically, the connection terminal or the like (heat generation source) included in the wiring 422 is exposed to a portion exposed from the second opening 72 in the flat surface of the second fin 52 (the surface in close contact with the second partition wall 14B). Directly fixed. Therefore, the wiring 422 is cooled through the second fin 52 as a cooling target. In addition, when the 2nd partition wall 14B has thermal conductivity, even if there is no 2nd opening 72, it is possible to cool the inside of the 3rd chamber 13 via the 2nd partition wall 14B. In this case, the second fin 52 is brought into close contact with the surface of the second partition wall 14B on the first chamber 11 side, and the connection terminal included in the wiring 422 is provided on the surface of the second partition wall 14B on the third chamber 13 side. It is preferable to adhere.

  Further, the input / output circuit 42 disposed in the third chamber 13 is directly cooled by the air flowing through the first sub-flow path 22. Therefore, the inside of the third chamber 13 is cooled directly through the first sub-channel 22 and indirectly through the second fins 52.

  In this way, precision parts that require protection from foreign substances such as dust are placed in the second chamber 12 that is sealed and has dustproof performance. On the other hand, the first chamber 11 or the third chamber 13 does not require protection from foreign objects as much as precision parts, depending on how much the windings, terminals, wiring, etc. need to be protected or cooled from foreign objects. Selectively arranged. The first fin 51 and the second fin 52 perform heat exchange with the air flowing through the main flow path 21 in the first chamber 11, so that components or circuits attached or closely fixed to these fins are indirect. To be cooled. Further, the air flowing through the main flow path 21 passes through the first chamber 11, and the air flowing through the first sub flow path 22 passes through the third chamber 13, whereby the first chamber 11 and the third chamber 13. Circuits, components, etc. arranged inside are directly cooled.

  Specifically, the air flowing through the main channel 21 passes through the cooling of the first winding 40 </ b> A disposed in the main channel 21 and the passage through the first fin 51 and the second fin 52, and then enters the main channel 21. The air is blown to the arranged second winding 40B and then discharged from the exhaust port 1b. Thereby, the first winding 40A and the second winding 40B are directly cooled, and the main circuit 41 in the second chamber 12 and the input / output circuit 42 in the third chamber 13 are respectively connected to the first fin 51 and Cooled indirectly through the second fins 52. In addition, after a part of the air sucked from the air inlet 1a is blown to the first winding 40A disposed at a location where the first sub-channel 22 branches from the main channel 21, the first vent 6a. Through the third chamber 13. The air flowing through the first sub-channel 22 in the third chamber 13 directly cools the input / output circuit 42 in the third chamber 13, and then temporarily enters the first chamber 11 through the second vent 6 b. After returning, it is discharged from the exhaust port 1b.

  The first winding 40A and the second winding 40B are parts that do not require protection from foreign matters such as dust and have corrosion resistance, and generate heat during operation. Such components are arranged in the first chamber 11 because it is possible to directly cool a large amount of air sucked from the intake port 1a.

  According to the above power supply device, a part of the air sucked from the intake port 1a flows into the third chamber 13 from the first chamber 11 through the first vent 6a, so that the power supply device (mainly the input / output circuit 42). An appropriate amount of air that can suppress adverse effects on the air is sent into the third chamber 13. Therefore, the inside of the housing 1 can be efficiently cooled, and adverse effects that can be caused by outside air can be suppressed. And in the said power supply device, in order to optimize the quantity of the air sent into the 3rd chamber 13, it is possible to adjust the opening area, shape, etc. of the 1st ventilation hole 6a.

  In the power supply device, the first winding 40 </ b> A is passed through the first vent 6 a and disposed from the first chamber 11 to the third chamber 13. That is, the first winding 40 </ b> A is disposed at a location where the first sub-channel 22 branches from the main channel 21 (inlet of the first sub-channel 22). Therefore, the air sucked from the intake port 1a is partially received by the first winding 40A, and as a result, the momentum of the air flowing into the third chamber 13 through the first vent 6a is weakened. Therefore, air flows gently through the first sub-channel 22. That is, an appropriate amount of air flows through the first sub-channel 22 for cooling the inside of the third chamber 13.

  In this way, the air sucked from the air inlet 1a is received by a part that does not require protection from foreign matters such as dust and has corrosion resistance (in this embodiment, the first winding 40A). Foreign substances in the air can be attached to the surface. Therefore, the inflow of foreign matter into the third chamber 13 can be prevented. In addition, as an object to which foreign matter is attached, an obstruction capable of receiving air may be installed instead of an electric component such as a winding.

  As shown in FIG. 2, in the present embodiment, the wiring 422 includes a plate-like bus bar 422a. The bus bar 422 a is disposed substantially parallel to the second flat portion 152 and is connected to the input / output terminal 421. By the bus bar 422a and the second partition wall 14B (including the second fin 52 that closes the second opening 72) arranged in this manner, the air flowing through the first sub-passage 22 is guided to the second vent 6b.

  As shown in FIG. 5, in order to guide the air flowing in the third chamber 13 to the second vent 6b, the bus bar 422a may be provided with a guide portion 422b formed by bending it. Good. In addition, the guide part 422b may be bent smoothly in a curved shape. Thereby, the direction of the 1st subchannel 22 can be changed in the direction which goes to the 2nd vent 6b in the position near the 2nd vent 6b. According to such a configuration, it is possible to efficiently guide the air flowing through the first sub-channel 22 to the exhaust port 1b.

  In the above power supply device, the wiring 422 may be provided with a crossing portion that crosses the wiring 422 in the middle of the first sub-flow path 22. According to such a configuration, since the air flows around the intersection, it is possible to prevent the air from being directly blown to the electronic components included in the input / output circuit 42.

  According to the power supply device, the third chamber 13 can be cooled using a part of the air sucked from the intake port 1a. Therefore, it is not necessary to separately provide a fan for cooling the third chamber 13, and thus the power supply device can be reduced in size and weight. In other words, the cooling structure of the power supply device is particularly suitable for an electrical device in which the following two parts are built in the housing 1. That is, the first part includes precision parts, and is a part (main circuit 41 and control circuit in the present embodiment) that requires cooling together with protection by sealing (protection from foreign matters such as dust). The second part does not need to be shielded from the outside air as much as the circuits and parts arranged in the second chamber 12, but requires more protection from foreign matter than the parts arranged in the first chamber 11. In addition, it is a portion that requires cooling (the input / output circuit 42 in this embodiment).

  FIG. 6 is a perspective view showing an example of a power supply system constructed by stacking a plurality of the power supply devices. FIG. 7 is a longitudinal sectional view partially showing the power supply system. As described above, the third vent 6c is provided in the bottom wall 10F. And the air guide | induced to the lower side of the housing | casing 1 through the 3rd vent 6c from the 1st chamber 11 forms the 2nd subchannel 23 as FIG. 7 shows, and is distribute | arranged directly under it. Sprayed on the top wall 10E of the power supply. As a result, the power supply device directly below is cooled. In this way, the air discharged from the third vent 6c flows into the gap 16 formed between the adjacent power supply devices, so that the heat retention in the gap 16 is eliminated. As a result, the power supply device Each is efficiently cooled. That is, the second subchannel 23 is used for cooling a power supply system constructed by stacking a plurality of the power supply devices.

  The third vent 6c may be provided in the side wall 10D that constitutes the third chamber 13. In this case, the second sub-flow path 23 is the casing 1 as a flow path for guiding a part of the air flowing through the first sub-flow path 22 to the outside (the right side or the left side of the casing 1) through the third vent 6c. Will be formed. According to such a configuration, in the power supply system constructed by arranging a plurality of power supply devices side by side, each of the power supply devices can be efficiently cooled.

  The power supply device may have a configuration without the second fin 52. In this case, it is preferable that the second partition wall 14 </ b> B is used as a heat exchanging part instead of the second fin 52 by giving the second partition wall 14 </ b> B thermal conductivity. By providing not only the second partition wall 14B but also the first partition wall 14A with thermal conductivity, the first partition wall 14A and the second partition wall 14B replace the first fin 51 and the second fin 52, respectively. It may be used as a heat exchange part.

  The above description of the embodiment is to be considered in all respects as illustrative and not restrictive. The scope of the present invention is shown not by the above embodiments but by the claims. Further, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

  For example, each configuration of the cooling structure of the power supply device is not limited to the power supply device, and can be applied to various electrical devices.

DESCRIPTION OF SYMBOLS 1 Housing | casing 1a Intake port 1b Exhaust port 3 Fan 6a 1st ventilation port 6b 2nd ventilation port 6c 3rd ventilation port 8 Cover 10A Front wall 10B Rear wall 10C, 10D Side wall 10E Top wall 10F Bottom wall 11 1st chamber 12 1st Two chambers 13 Third chamber 14A First partition wall 14B Second partition wall 16 Clearance 21 Main flow path 22 First sub flow path 23 Second sub flow path 40A First winding 40B Second winding 41 Main circuit 42 Input / output circuit 51 1st fin 52 2nd fin 71 1st opening 72 2nd opening 150 Step part 151 1st flat part 152 2nd flat part 411 Switch element 421 Input / output terminal 422 Wiring 422a Bus bar 422b Guide part D1 Direction L1, L2 Distance P1 , P2, P3 position

Claims (9)

A housing having an intake port and an exhaust port, wherein the first chamber is formed with a main flow path through which air sucked from the intake port flows to the exhaust port; A second chamber disposed adjacent to the first chamber, and a third chamber disposed adjacent to the first chamber via a second partition wall at a position opposite to the second chamber, The chamber has a sealed enclosure,
The second partition wall is provided with a first vent leading to the third chamber,
An electrical device in which a first sub-flow path is formed to allow a part of air sucked from the air inlet to flow into the third chamber through the first vent.   The second partition wall has a second vent that returns air flowing through the first sub-flow path in the third chamber to the first chamber at a position closer to the exhaust port than to the first vent. The electrical apparatus according to claim 1, wherein: In the first chamber, the second partition wall squeezed from the first chamber toward the third chamber so that the region near the intake port is wider than the region near the exhaust port. A step is formed,
The electrical device according to claim 1, wherein the first vent is provided in the stepped portion.   The electrical apparatus according to any one of claims 1 to 3, further comprising a first fin that is installed in the first chamber and that cools the second chamber by heat exchange with air flowing through the main flow path. .   The electric device according to claim 4, wherein at least a part of the first partition wall is formed by the first fin. A second fin that is installed in the first chamber and cools the third chamber by heat exchange with the air flowing through the main flow path;
The electrical device according to any one of claims 1 to 5, wherein the first ventilation port is disposed closer to the intake port than the second fin.   The electric device according to claim 6, wherein at least a part of the second partition wall is formed by the second fin. The first partition wall and the second partition wall are erected on the inner surface of the outer wall constituting the housing;
A portion of the outer wall that is in contact with the main flow path is provided with a third vent that leads to the outside of the housing,
The electrical device according to any one of claims 1 to 7, further comprising a second sub-flow channel that guides a part of the air flowing through the main flow channel to the outside through the third vent. A power circuit is constructed in the housing,
The power supply circuit includes a winding disposed in the first chamber, a main circuit disposed in the second chamber, and an input / output circuit disposed in the third chamber,
The input / output circuit includes an input / output terminal and a wiring in the power supply circuit, and the wiring is formed with a guide portion for changing a direction of the first sub-flow path. Item 9. The electrical device according to any one of Items 1 to 8.

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