Power supply

Abstract

To provide an electric power supply capable of suppressing reduction in manufacturing efficiency.SOLUTION: An electric power supply (a power conditioner 100) comprises: a housing 10 having an aperture 121; a heat sink 20 attached to the housing 10; a sealing portion 30 mounted between the housing 10 and the heat sink 20 in an arranged state around the aperture 121; and a fixing portions 40 fixing together the housing 10 and the heat sink 20. The fixing portions 40 fix the sealing portion 30 to the housing 10 and the heat sink 20 by sandwiching the sealing portion 30 between the housing 10 and the heat sink 20. The sealing portion 30 includes: first sealing members 31 arranged along the aperture 121; and second sealing members 32 of which ends are arranged respectively near the first sealing members 31 and along the aperture 121. The fixing portions 40 fix the housing 10, the heat sink 20 and the sealing portion 30 without penetrating through the sealing portion 30.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a power supply device such as a power conditioner. [Background technology]

[0002] Power supply devices such as power conditioners that convert DC power generated by solar cells or the like into AC power for use in, for example, commercial facilities, hospitals, nursing homes, etc., and supply the power have become widespread. Patent Document 1 discloses a structure that uses a heat sink to cool multiple electrical components housed in a housing. Power supply devices installed outdoors are exposed to rainwater, etc. In order to prevent water, etc. from entering through the boundary between the heat sink and the housing, the power supply device is provided with a resin sealing member interposed between the heat sink and the housing, and screws that penetrate and fix the sealing member (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5896833 Summary of the Invention [Problem to be solved by the invention]

[0004] In the power supply device described above, through holes for passing the screws are formed in the sealing member. It is not easy to form through holes at a predetermined interval with high precision in a resin sealing member, which ultimately becomes a factor in reducing the manufacturing efficiency of the power supply device.

[0005] An object of the present invention is to provide a power supply device capable of suppressing a decrease in manufacturing efficiency. [Means for solving the problem]

[0006] A power supply device according to one embodiment of the present invention comprises a housing having an opening, a heat sink attached to the housing, a sealing portion interposed between the housing and the heat sink when arranged around the opening, and a fixing portion that fixes the housing, the heat sink and the sealing portion without penetrating the sealing portion sandwiched between the housing and the heat sink, wherein the sealing portion has a first sealing member arranged along the opening, and a second sealing member whose end is adjacent to the first sealing member and arranged along the opening. Effect of the Invention

[0007] According to the above aspect, it is possible to provide a power supply device that can suppress a decrease in manufacturing efficiency. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram showing an installation example of a power conditioner according to an embodiment. [Diagram 2] FIG. 2 is a perspective view showing a schematic front appearance of the power conditioner. [Diagram 3] FIG. 2 is a perspective view showing a schematic rear appearance of the power conditioner. [Figure 4] FIG. 2 is a schematic exploded front perspective view of a power conditioner. [Diagram 5] FIG. 4 is a plan view showing the heat sink and the sealing portion from the rear side of the power conditioner. [Figure 6] 4 is a cross-sectional view showing the positional relationship between one fixing portion and a sealing portion. FIG. [Figure 7] 7 is a plan view showing the positional relationship between the fixing portion and the sealing portion shown in FIG. 6. [Figure 8] FIG. 2 is a plan view illustrating a first sealing member and a second sealing member. [Figure 9] FIG. 2 is a plan view illustrating a first sealing member and a second sealing member. [Figure 10] 10 is a schematic diagram showing a planar positional relationship between a first sealing member and a second sealing member according to Modifications 1 to 3. FIG. [Figure 11] 13 is a cross-sectional view showing the positional relationship between a fixing portion, a first sealing member, and a second sealing member according to Modification 4. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A power supply device according to one aspect of the present invention comprises a housing having an opening, a heat sink attached to the housing, a sealing portion interposed between the housing and the heat sink when arranged around the opening, and a fixing portion that fixes the housing and the heat sink with the sealing portion sandwiched between them without penetrating the sealing portion, wherein the sealing portion has a first sealing member arranged along the opening, and a second sealing member whose end is adjacent to the first sealing member and arranged along the opening.

[0010] The sealing portion is manufactured, for example, by unrolling an elastic resin member in a roll shape and cutting it to a predetermined length. It is not easy to form through holes in such a resin member with high precision so that the positions of the through holes in the housing and the heat sink are aligned. In this embodiment, since it is not necessary to form through holes in each member (the first sealing member and the second sealing member) that constitutes the sealing portion, it is possible to improve the manufacturing efficiency of the power supply device. Therefore, it is possible to provide a power supply device that can suppress a decrease in manufacturing efficiency.

[0011] Furthermore, the housing and the heat sink are fixed to the sealing portion having the first sealing member and the second sealing member without the fixing portion penetrating, and there is no need to provide a through hole in the sealing portion through which the fixing portion penetrates. In other words, the function of the sealing portion to prevent the intrusion of water, etc. is exerted without being impaired. Since the sealing portion has the first sealing member and the second sealing member, it is easier to manufacture than a sealing portion formed from a single member, and the ease of assembly to the housing can also be improved.

[0012] The heat sink may have a plate portion positioned inside the housing relative to the opening, the sealing portion may be positioned inside the housing and interposed between the plate portion and the housing, and the plate portion may extend outward beyond at least one of the first sealing member and the second sealing member when viewed from a direction perpendicular to the plate portion.

[0013] This allows the sealing portion to be reliably positioned on the intrusion path of water, etc. Even if water or other foreign matter passes over the sealing portion, the plate portion extends further, and the foreign matter cannot reach electrical components, etc. unless it passes over the plate portion. This makes it possible to more reliably suppress the effects of water, etc.

[0014] The heat sink may have a plurality of fins protruding from a plate portion, and the plurality of fins may be inserted inside the opening.

[0015] According to this, since the fins of the heat sink are inserted into the opening, each fin is easily exposed to the outside air, and therefore, the heat dissipation effect of the heat sink itself can be improved.

[0016] The first sealing member may be arranged along a first direction, and the second sealing member may be arranged along a second direction intersecting the first direction and overlapping the first sealing member when viewed from the second direction.

[0017] For example, if the first direction is horizontal and the second direction is vertical, the second sealing member will be arranged to overlap the first sealing member when viewed from the vertical direction. In other words, the boundary between the first sealing member and the second sealing member will not be aligned along the vertical direction. Even if water or the like tries to infiltrate from this boundary, the effect of gravity on the progress of the water or the like can be suppressed because the boundary does not follow the vertical direction. Therefore, the infiltration of water or the like can be suppressed.

[0018] The end of the second sealing member may abut against the first sealing member.

[0019] According to this, since the end portion of the second sealing member abuts against the first sealing member, the boundary between the first sealing member and the second sealing member can be blocked, and therefore, intrusion of water or the like from the boundary can be more reliably prevented.

[0020] The first sealing member may protrude in the first direction further than the second sealing member when viewed from the second direction.

[0021] For example, when the first direction is horizontal and the second direction is vertical, the first sealing member protrudes in the first direction further than the second sealing member when viewed from the second direction, so that even if water or the like intrudes beyond the boundary between the first sealing member and the second sealing member, the further extending first sealing member can prevent the water or the like from falling into the housing, thereby preventing the water or the like from progressing into the inside of the power supply device.

[0022] The opening may be approximately rectangular, the first sealing members may be formed in a straight line and two of the first sealing members may be arranged along the two sides that are the ends of the opening in the second direction, and the second sealing members may be formed in a straight line and two of the second sealing members may be arranged along the two sides that are the ends of the opening in the first direction.

[0023] According to this, since the first sealing member and the second sealing member are each linear, the first sealing member and the second sealing member can be easily manufactured by feeding out the resin member. This can improve manufacturing efficiency. Furthermore, since the entire circumference of the opening is continuously surrounded by the two first sealing members and the two second sealing members, it is possible to further suppress the intrusion of water, etc.

[0024] The fixing portion may be positioned outside the opening relative to the first sealing member or the second sealing member when viewed from a third direction intersecting the first direction and the second direction.

[0025] According to this, when viewed from the third direction, the fixing portion is positioned outside the first sealing member or the second sealing member, so that the first sealing member or the second sealing member can be positioned closer to the opening, making it possible to more reliably seal off water, etc. that may attempt to infiltrate through the opening.

[0026] The fixing portion has an axis portion that is inserted into the housing and the heat sink, and a head portion provided at an end of the axis portion, and the head portion may overlap at least one of the first sealing member and the second sealing member when viewed from the axial direction of the axis portion.

[0027] With this, since the head of the fixing part overlaps with at least one of the first sealing member and the second sealing member when viewed from the axial direction of the shaft part, a pressing force from the head can be reliably applied to at least one of the first sealing member and the second sealing member, and therefore, when the housing and the heat sink are fixed with the fixing part, at least one of the first sealing member and the second sealing member can also be reliably fixed.

[0028] A power supply device according to an embodiment of the present invention (including its modified examples) will be described below with reference to the drawings. The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, component arrangement positions, connection forms, etc. shown in the following embodiments are merely examples and are not intended to limit the present invention. The dimensions, etc. in each drawing are not strictly illustrated.

[0029] In the following description and drawings, the width direction of the power supply device is defined as the X-axis direction, the depth direction is defined as the Y-axis direction, and the height direction is defined as the Z-axis direction. The X-axis direction is an example of a first direction, the Z-axis direction is an example of a second direction, and the Y-axis direction is an example of a third direction. These X-axis direction, Y-axis direction, and Z-axis direction are directions that intersect with each other (orthogonal in the following embodiments and modifications). In this embodiment, the X-axis direction and Y-axis direction are directions along a horizontal surface, and the Z-axis direction is a direction along a vertical direction that is the direction of gravity, but depending on the installation posture of the power supply device, the X-axis direction, Y-axis direction, and Z-axis direction may differ from the above-mentioned case. In the following description, for example, the positive X-axis direction indicates the direction of the X-axis arrow, and the negative X-axis direction indicates the opposite side to the positive X-axis direction. The same applies to the Y-axis direction and the Z-axis direction. Furthermore, expressions indicating relative directions or postures, such as parallel and perpendicular, also include cases where they are not strictly those directions or postures. For example, two directions being parallel does not only mean that the two directions are completely parallel, but also means that the two directions are substantially parallel, that is, that there is a difference of, for example, about a few percent.

[0030] [Embodiment Mode] A power supply device according to an embodiment will be described. In the following embodiment, a power conditioner 100 will be described as an example of a power supply device. FIG. 1 is a schematic diagram showing an installation example of the power conditioner 100. As shown in FIG. 1, the power conditioner 100 is supported by a structure including a plurality of supports 310 installed in, for example, a commercial facility. A solar cell panel A is also supported on this structure. The power conditioner 100 is electrically connected to the solar cell panel A, a power storage device B installed outside the structure, and a load C. The power conditioner 100 is capable of converting DC power generated by the solar cell panel A into AC power and supplying it to the power storage device B and the load C. The power conditioner 100 is also electrically connected to a commercial power system (not shown), and can supply the converted AC power to the commercial power system for selling. The aspect of the power conditioner 100 shown in FIG. 1 is merely an example. The embodiment of the power conditioner 100 is not limited to the embodiment shown in FIG. 1, and may take various forms such as an independent power source, a power source with a storage battery, or a grid-stabilized power source.

[0031] A specific configuration of the power conditioner 100 will be described. Fig. 2 is a perspective view showing the external appearance of the power conditioner 100 from the front. Fig. 3 is a perspective view showing the external appearance of the power conditioner 100 from the rear. Fig. 4 is a perspective view showing the power conditioner 100 with a part of it disassembled and shown from the front.

[0032] As shown in FIGS. 2 to 4, the power conditioner 100 includes a housing 10 having a substantially rectangular parallelepiped shape, and a heat sink 20 that partially protrudes from the housing 10.

[0033] The housing 10 is composed of a rectangular lid-shaped front cover 11 and a main housing 12 having a rectangular parallelepiped outer shape. The shape of the housing 10 of the power conditioner 100 is not limited to a substantially rectangular parallelepiped shape, and may be a cylindrical shape such as a circular cylinder, an elliptical cylinder, or a polygonal prism, or may be another shape such as a sphere or an elliptical sphere.

[0034] The main housing 12 is a metal member formed in a rectangular tube shape with one end in the negative Y-axis direction open and the other end having a bottom. A rectangular opening 121 is formed in the bottom of the main housing 12. The opening 121 is formed in a substantially rectangular shape that is elongated in the X-axis direction. A plurality of holes 121a are arranged at intervals around the entire circumference of the periphery of the opening 121 at the bottom of the main housing 12. Each of the holes 121a penetrates the bottom of the main housing 12. Fixing parts 40 that attach the heat sink 20 to the bottom of the main housing 12 are inserted into the plurality of holes 121a.

[0035] The bottom of the main housing 12 is provided with four legs 122 extending outward from four corners of the bottom. The legs 122 are formed of a metal plate bent into a crank shape to form a step. A mounting hole is formed at the tip of the legs 122. Each leg 122 is fixed to the object to which it is to be attached by fastening a bolt (not shown) to the object to which it is to be attached with the bolt passing through the mounting hole. In this way, the main housing 12 is attached to the object to which it is to be attached. The steps of the legs 122 position the bottom of the main housing 12 at a predetermined distance from the object to which it is to be attached in the negative Y-axis direction.

[0036] The front cover 11 is a metal member fixed to the main housing 12 so as to cover the open portion of the main housing 12 from the negative Y-axis direction. The front cover 11 includes a rectangular front panel 11a and a rectangular tubular edge portion 11b extending from the outer edge of the front panel 11a by integral molding. The front panel 11a faces the open end of the main housing 12, and the edge portion 11b covers the outer periphery of the main housing 12. In addition, a rectangular frame-shaped sealant (not shown) is provided between the front panel 11a and the open end of the main housing 12 to hermetically seal the gap therebetween.

[0037] The housing 10 contains a plurality of electrical components. Although not shown, the electrical components include, for example, a terminal block, a DC breaker, an AC breaker, a DC reactor, an AC reactor, a DC circuit board, an AC circuit board, a conversion element, and a main control circuit board.

[0038] The terminal block is a terminal block to which electric wires connected to the solar cell panel A, the storage device B, and the load C are connected. The DC breaker and the AC breaker are breakers electrically connected to the terminals of the terminal block. The AC reactor is a reactor including a coil and the like that is electrically connected to the conversion element and the AC board. The DC reactor is a reactor including a coil and the like that is electrically connected to the conversion element and the DC board. The DC circuit board is a circuit board including a rectifier, a noise filter, and the like that controls DC power. The AC circuit board is a circuit board including a rectifier, a noise filter, and the like that controls AC power. The conversion element is an element that is composed of a semiconductor switching element, and the like, and converts DC power to AC power. The main control circuit board is a circuit board for controlling the operation of the power conditioner 100, including the control of the conversion element.

[0039] Next, the heat sink 20 will be described. Fig. 5 is a plan view showing the heat sink 20 and the sealing portion 30 from the rear side of the power conditioner 100. In Fig. 5, the opening 121 is indicated by a dashed line.

[0040] The heat sink 20 is a member for dissipating heat inside the housing 10 to the outside of the housing 10. Specifically, the heat sink 20 is made of a metal having a relatively high thermal conductivity, such as aluminum. As shown in Figs. 4 and 5, the heat sink 20 integrally includes a plate portion 21 and a plurality of fin portions 22.

[0041] The plate portion 21 is formed in a generally rectangular shape that is elongated in the X-axis direction, and its size in plan view (as viewed in the Y-axis direction) is larger than the opening 121. The plate portion 21 is disposed within the housing 10 so as to face the opening 121 from the inner side of the housing 10. Although not shown, at least some of a plurality of electrical components are attached to the main surface of the plate portion 21 in the negative Y-axis direction. This allows the heat sink 20 to directly dissipate heat from the electrical components attached to the plate portion 21. It is preferable that at least one of a conversion element, a DC reactor, and an AC reactor, which are relatively prone to generating heat, is attached to the plate portion 21, as this allows for effective heat dissipation.

[0042] On the other hand, the plate portion 21 has a plurality of fins 22 and a plurality of screw holes 23 on its main surface in the positive direction of the Y axis. Specifically, the plurality of fins 22 are arranged in a region corresponding to the opening 121 on the main surface in the positive direction of the Y axis of the plate portion 21. The fins 22 are not provided on the entire periphery of the plate portion 21. Each of the plurality of fins 22 is formed in a substantially rectangular shape elongated in the Z axis direction when viewed in the X axis direction, and is arranged at a predetermined interval in the X axis direction. The plurality of fins 22 protrude in the positive direction of the Y axis from the opening 121 of the main housing 12 (see FIG. 3, etc.). The periphery of the plate portion 21 faces the bottom of the main housing 12 over the entire periphery. A seal portion 30 is interposed between the periphery of the plate portion 21 and the bottom of the main housing 12 over the entire periphery.

[0043] 5, the sealing portion 30 is disposed so as to surround the multiple fin portions 22. The sealing portion 30 is joined to the peripheral edge portion of the plate portion 21 by double-sided tape or adhesive.

[0044] Alternatively, the sealing portion 30 may be fitted into the fin portion 22 and fixed to the plate portion 21 by being sandwiched between the fin portion 22 and the fixing portion 40 when viewed from the positive direction of the Y axis. This eliminates the need for double-sided tape and adhesive, improving manufacturing efficiency and reducing manufacturing costs.

[0045] A plurality of screw holes 23 are provided at a predetermined interval in the circumferential direction on the peripheral edge of the plate portion 21. Each screw hole 23 is disposed in a position adjacent to the sealing portion 30. Each hole portion 121a is disposed in the main housing 12 so as to correspond to each screw hole 23, and thus each screw hole 23 and each hole portion 121a are communicated with each other after assembly.

[0046] The sealing portion 30 is formed by combining a plurality of linear sheet-shaped rubber materials. Specifically, the sealing portion 30 has a pair of first sealing members 31 and a pair of second sealing members 32 as rubber materials.

[0047] A pair of first sealing members 31 are arranged parallel to each other so as to sandwich the fins 22 in the Z-axis direction, and are arranged along the X-axis direction. Specifically, the first sealing member 31 in the positive Z-axis direction is arranged to abut the end of each fin 22 in the positive Z-axis direction, and the first sealing member 31 in the negative Z-axis direction is arranged to abut the end of each fin 22 in the negative Z-axis direction. Each first sealing member 31 extends continuously between both ends of the plate 21 in the X-axis direction. When the heat sink 20 is attached to the bottom of the main housing 12 and each first sealing member 31 is sandwiched between the main housing 12 and the plate 21, each first sealing member 31 is arranged along two sides located at the ends of the opening 121 in the second direction.

[0048] A pair of second sealing members 32 are arranged parallel to each other so as to sandwich the fins 22 in the X-axis direction, and are arranged along the Z-axis direction. Specifically, the second sealing member 32 in the positive X-axis direction abuts against the fins 22 arranged most in the positive X-axis direction, and the second sealing member 32 in the negative X-axis direction abuts against the fins 22 arranged most in the negative X-axis direction. Each second sealing member 32 is arranged between a pair of first sealing members 31. When the heat sink 20 is attached to the bottom of the main housing 12 and each second sealing member 32 is sandwiched between the main housing 12 and the plate portion 21, each second sealing member 31 is arranged along two sides located at the ends of the opening 121 in the first direction. The ends of each second sealing member 32 in the positive Z-axis direction abut against the first sealing member 31 in the positive Z-axis direction, and the ends of each second sealing member 32 in the negative Z-axis direction abut against the first sealing member 31 in the negative Z-axis direction. That is, each second sealing member 32 is disposed so as to overlap with the first sealing member 31 when viewed from the vertical direction. As described above, each first sealing member 31 extends continuously between both ends of the plate portion 21 in the X-axis direction, so that both ends of each first sealing member 31 protrude from each second sealing member 32 to the opposite side of the opening 121 when viewed from the vertical direction. That is, both ends of each first sealing member 31 protrude from each second sealing member 32 in the first direction when viewed from the second direction. Also, the plate portion 21 extends outward relative to each of the first sealing member 31 and the second sealing member 32 when viewed from a direction perpendicular to the plate portion 21 (when viewed from the Y-axis direction). As shown in FIG. 5, the plate portion 21 does not extend outward at a portion of the first sealing member 31 corresponding to the portion protruding from the second sealing member 32, but the plate portion 21 may also extend outward at that portion. In the plate portion 21, the portion outside the first sealing member 31 or the second sealing member 32 is a portion that is disposed outside the opening 121. Even if water or the like intrudes from the boundary between the first sealing member 31 and the second sealing member 32, the water or the like will progress through the portion of the plate portion 21 outside the first sealing member 31 or the second sealing member 32. In other words, the path through which water intrudes can be lengthened, and the progress of water or the like into the inside of the power conditioner 100 can be suppressed.

[0049] The positional relationship between the sealing portion 30 and the fixing portion 40 will be described. FIG. 6 is a cross-sectional view showing the positional relationship between one fixing portion 40 and the sealing portion 30 according to the embodiment. FIG. 6 is a cross-sectional view of a cut surface including the line VI-VI in FIG. 5. FIG. 7 is a plan view showing the positional relationship between the fixing portion 40 and the sealing portion 30 shown in FIG. 6. Note that, although the fixing portion 40 corresponding to one abutment portion between the first sealing member 31 and the second sealing member 32 will be described as an example here, the fixing portion 40 corresponding to the other abutment portions basically have the same positional relationship.

[0050] As shown in FIG. 6 and FIG. 7, the first sealing member 31 and the second sealing member 32 are fixed by the fixing portion 40 in a state where they are in close contact with the main surface of the plate portion 21 in the positive direction of the Y axis and the surface of the bottom of the main housing 12 in the negative direction of the Y axis. The fixing portion 40 is a screw having a screw shaft 41 as an axis portion and a head portion 42. The fixing portion 40 is screwed into the screw hole 23 of the heat sink 20 in a state where the screw shaft 41 penetrates the hole portion 121a of the main housing 12 from the positive direction of the Y axis. In this state, the screw shaft 41 is inserted into the main housing 12 and the heat sink 20. At this time, as shown in FIG. 7, the head portion 42 of the fixing portion 40 overlaps with the first sealing member 31 and the second sealing member 32, respectively, when viewed in the Y axis direction (when viewed in the axial direction of the screw shaft 41). Therefore, one fixing portion 40 presses the first sealing member 31 and the second sealing member 32, sandwiching them between the main housing 12 and the heat sink 20.

[0051] The screw shaft 41 of the fixing part 40 does not penetrate either the first sealing member 31 or the second sealing member 32. In other words, the positions of the hole 121a and the screw hole 23 are such that, as viewed in the Y-axis direction, the screw shaft 41 of the fixing part 40 does not overlap either the first sealing member 31 or the second sealing member 32, and the head 42 overlaps either the first sealing member 31 or the second sealing member 32.

[0052] The fixing portion 40 that does not correspond to the abutting portion between the first sealing member 31 and the second sealing member 32 fixes only one of the first sealing member 31 and the second sealing member 32. That is, in the fixing portion 40 that fixes only the first sealing member 31, the head 42 overlaps the first sealing member 31 as viewed in the Y-axis direction, with the screw shaft 41 not penetrating the first sealing member 31. On the other hand, in the fixing portion 40 that fixes only the second sealing member 32, the head 42 overlaps the second sealing member 32 as viewed in the Y-axis direction, with the screw shaft 41 not penetrating the second sealing member 32.

[0053] After fixing, the head 42 of each fixing part 40 is in close contact with the bottom of the main housing 12 over the entire periphery, preventing the intrusion of water, etc. from the boundary between the head 42 and the bottom. When a washer is attached to the screw shaft 41, it is sufficient that the washer overlaps at least one of the first sealing member 31 and the second sealing member 32 when viewed in the Y-axis direction. In this case, the washer is in close contact with the head 42 and the bottom of the main housing 12 over the entire periphery, preventing the intrusion of water, etc. If the washer is a rubber washer, it is possible to further improve waterproofing.

[0054] In this way, the first sealing member 31 and the second sealing member 32 are fixed to the main housing 12 in a state where the fixing parts 40 do not penetrate through them. Since the ends of the second sealing members 32 are in contact with the first sealing members 31, even if water or the like that has entered through the opening 121 reaches the boundary between the first sealing member 31 and the second sealing member 32, the contact part acts as a barrier to prevent further intrusion of water or the like. In particular, in this embodiment, the contact part between the first sealing member 31 and the second sealing member 32 is fixed by the fixing parts 40, and this fixation causes the contact part to be compressed and deformed more than other parts. This compressive deformation tightly blocks the boundary between the first sealing member 31 and the second sealing member 32, which is a path for water or the like to enter. Therefore, the intrusion of water or the like can be more reliably prevented.

[0055] [Effects, etc.] As described above, the power conditioner 100 according to the present embodiment includes the housing 10 having the opening 121, the heat sink 20 attached to the housing 10, the sealing portion 30 interposed between the housing 10 and the heat sink 20 in a state in which the sealing portion is disposed around the opening 121, and the fixing portion 40 that fixes the housing 10 and the heat sink 20 sandwiching the sealing portion in a state in which the fixing portion does not penetrate the sealing portion. The sealing portion 30 has a first sealing member 31 disposed along the opening 121, and a second sealing member 32 whose end is close to the first sealing member 31 and disposed along the opening 121.

[0056] The sealing portion 30 is manufactured, for example, by unrolling an elastic resin member in a roll shape. It is not easy to form through holes in such a resin member with high precision so that the positions of the through holes in the housing and the heat sink are aligned. However, as in the present embodiment, if it is not necessary to form through holes in each member (the first sealing member 31 and the second sealing member 32) that constitutes the sealing portion 30, it is possible to improve the manufacturing efficiency of the power conditioner 100.

[0057] Furthermore, compared to the case where a single annular sealing portion having a shape corresponding to opening 121 is attached to opening 121, in the present embodiment, sealing portion 30 is divided into first sealing member 31 and second sealing member 32, which makes it possible to increase the material yield of sealing portion 30.

[0058] At least one of the first sealing member 31 and the second sealing member 32 is fixed to the housing 10 without the fixing part 40 penetrating the sealing part 30 having the first sealing member 31 and the second sealing member 32, so there is no need to provide a through hole in the sealing part 30 through which the fixing part 40 penetrates. In other words, the sealing ability of the sealing part 30 is not reduced.

[0059] Also, for example, when a single annular sealing part having a shape corresponding to the opening 121 is attached to the opening 121, if a through hole for fixing is formed in the sealing part, the fixing part can be inserted into the through hole for positioning. However, if a through hole is not formed in the annular sealing part, positioning is difficult, and the ease of assembly to the main housing is reduced, and there is a risk of loss of airtightness. In this embodiment, since the sealing part 30 has the first sealing member 31 and the second sealing member 32, it is possible to make the sealing part 30 of a simple configuration compared to a sealing part formed from a single member. If the configuration of the sealing part 30 is simple, the ease of assembly to the housing 10 can be improved, and therefore the airtightness can be improved.

[0060] The heat sink 20 has a plate portion 21 that is positioned inside the housing 10 relative to the opening 121, and the sealing portion 30 is positioned inside the housing 10 and interposed between the plate portion 21 and the housing 10, and when viewed from a direction perpendicular to the plate portion 21, the plate portion 21 extends outward further than at least one of the first sealing member 31 and the second sealing member 32.

[0061] According to this, since the plate portion 21 of the heat sink 20 is disposed inside the housing 10 from the opening 121, the intrusion path of water, etc. can be made longer than when the plate portion 21 of the heat sink 20 is disposed outside the housing 10. Furthermore, since the sealing portion 30 is disposed inside the housing 10 and interposed between the plate portion 21 and the housing 10, the sealing portion 30 can be reliably disposed on the intrusion path of water, etc. When viewed from a direction perpendicular to the plate portion 21, the plate portion 21 is disposed so as to extend outward from at least one of the first sealing member 31 and the second sealing member 32, so the intrusion path of water, etc. can be made longer. Therefore, it is possible to more reliably suppress the intrusion of water, etc.

[0062] The heat sink 20 has a plurality of fins 22 protruding from one main surface of a plate portion 21, and the plurality of fins 22 protrude from an opening 121.

[0063] According to this, since the multiple fins 22 of the heat sink 20 protrude from the opening 121, each fin 22 is easily exposed to the outside air. Therefore, it is possible to improve the heat dissipation effect of the heat sink 20 itself.

[0064] The first sealing member 31 is arranged along a first direction (X-axis direction), and the second sealing member 32 is arranged along a second direction (Z-axis direction) that intersects the first direction, and overlaps the first sealing member 31 when viewed from the vertical direction.

[0065] According to this, since the second sealing member 32 is arranged so as to overlap the first sealing member 31 when viewed from the vertical direction, the boundary between the first sealing member 31 and the second sealing member 32 does not follow the vertical direction. Even if water or the like tries to infiltrate from this boundary, since the boundary does not follow the vertical direction, the effect of gravity on the progress of the water or the like can be suppressed. FIG. 8 is a plan view that typically shows the first sealing member 31 and the second sealing member 32 according to the embodiment. In FIG. 8, a form in which the second sealing member 32 does not overlap the first sealing member 31 when viewed from the vertical direction is shown by a two-dot chain line. In this form, when water or the like flows along the side surface of the second sealing member 32, the water or the like falls as it is without being blocked by the first sealing member 31 (arrow Y1). On the other hand, when the second sealing member 32 overlaps with the first sealing member 31 when viewed from the vertical direction as in this embodiment, even if water or the like flows along the side surface of the second sealing member 32, the first sealing member 31 blocks the water or the like from falling from below, and the effect of gravity on the progress of the water or the like can be suppressed (see arrow Y2). Therefore, the intrusion of water or the like can be further suppressed.

[0066] The second sealing member 32 has an end portion in contact with the first sealing member 31 .

[0067] According to this, since the end portion of the second sealing member 32 abuts against the first sealing member 31, it is possible to close the boundary between the first sealing member 31 and the second sealing member 32. Therefore, it is possible to more reliably prevent the intrusion of water or the like from the boundary.

[0068] When viewed from the second direction, the first sealing member 31 protrudes in the first direction beyond the second sealing member 32.

[0069] According to this, since the first sealing member 31 protrudes from the second sealing member 32 in the first direction when viewed from the vertical direction, even if water or the like enters from the boundary between the first sealing member 31 and the second sealing member 32, the protruding portion of the first sealing member 31 can prevent the water or the like from falling. FIG. 9 is a plan view that typically shows the first sealing member 31 and the second sealing member 32 according to the embodiment. In FIG. 9, a form in which the first sealing member 31 does not protrude from the second sealing member 32 is shown by a two-dot chain line. In this form, when water or the like flows along the side surface of the second sealing member 32, the first sealing member 31 does not protrude from the second sealing member 32, so the water or the like flows along the end surface of the first sealing member 31 and falls (see arrow Y11). On the other hand, when the first sealing member 31 protrudes from the second sealing member 32 in the first direction as in this embodiment, even if water or the like flows along the side surface of the second sealing member 32, the protruding portion of the first sealing member 31 becomes a barrier against the water or the like, and can prevent the water or the like from falling (see arrow Y12). Therefore, the progress of water and the like into the inside of the power conditioner 100 can be suppressed.

[0070] Furthermore, even if the length of the first sealing member 31 becomes shorter than expected due to manufacturing variations or deterioration over time, the boundary between the first sealing member 31 and the second sealing member 32 can be more reliably sealed. Therefore, the intrusion of water or the like from the boundary can be more reliably suppressed.

[0071] The opening 121 is approximately rectangular, the first sealing members 31 are formed in a straight line and two are arranged along the upper and lower sides of the opening 121, and the second sealing members 32 are formed in a straight line and two are arranged along the two sides of the opening 121 in the second direction.

[0072] According to this, since the first sealing member 31 and the second sealing member 32 are each linear, the first sealing member and the second sealing member can be easily manufactured by feeding out the resin member. This can improve manufacturing efficiency. Furthermore, since the entire circumference of the opening 121 is continuously surrounded by the two first sealing members 31 and the two second sealing members 32, it is possible to further suppress the intrusion of water, etc.

[0073] If the direction intersecting the first direction and the second direction is a third direction (Y-axis direction), the fixing portion 40 is positioned outside the opening 121 more than the first sealing member 31 or the second sealing member 32 when viewed from the third direction.

[0074] According to this, since the fixing portion 40 is disposed outside the opening 121 relative to the first sealing member 31 or the second sealing member 32 when viewed from the third direction, the fixing portion 40 can be disposed at a position farther from the opening 121 than the first sealing member 31 or the second sealing member 32. In other words, since the first sealing member 31 or the second sealing member 32 can be disposed closer to the opening 121, it is possible to more reliably seal water or the like that attempts to infiltrate through the opening 121. In addition, since the first sealing member 31 and the second sealing member 32 can be formed small, the manufacturing costs of the first sealing member 31 and the second sealing member 32 can be reduced.

[0075] The fixing portion 40 has a screw shaft 41 that is inserted into the housing 10 and the heat sink 20, and a head 42 provided at the end of the screw shaft 41, and the head 42 overlaps at least one of the first sealing member 31 and the second sealing member 32 when viewed from the axial direction of the screw shaft 41.

[0076] According to this, the head 42 of the fixing part 40 overlaps with at least one of the first sealing member 31 and the second sealing member 32 when viewed from the axial direction of the screw shaft 41, so that the pressing force from the head 42 can be reliably applied to at least one of the first sealing member 31 and the second sealing member 32. Therefore, when the housing 10 and the heat sink 20 are fixed with the fixing part 40, at least one of the first sealing member 31 and the second sealing member 32 can also be reliably fixed.

[0077] [Variations] Modifications of the above embodiment will be described below. In the following description, the same parts as those in the above embodiment will be denoted by the same reference numerals, and the description thereof may be omitted.

[0078] In Modifications 1-3, a description will be given of modifications of the planar positional relationship between the first sealing member 31 and the second sealing member 32. Fig. 10 is a schematic diagram showing the planar positional relationship between the first sealing member and the second sealing member according to Modifications 1 to 3.

[0079] Fig. 10(a) shows a planar positional relationship between the first sealing member 31a and the second sealing member 32a according to the first modification. In the above embodiment, the first sealing member 31 protrudes from the second sealing member 32 to the side opposite the opening 121 when viewed in the vertical direction. However, as shown in Fig. 10(a), the first sealing member 31a does not have to protrude from the second sealing member 32a to the side opposite the opening 121 when viewed in the vertical direction. Note that, in Fig. 10(a), the end face of the first sealing member 31a is disposed flush with the outer surface of the second sealing member 32a, but they do not have to be flush with each other.

[0080] Fig. 10(b) shows a planar positional relationship between the first sealing member 31b and the second sealing member 32b according to Modification 2. In the above embodiment, the case where the end of the second sealing member 32 abuts against the first sealing member 31 is exemplified. However, as shown in Fig. 10(b), the end of the second sealing member 32b does not have to abut against the first sealing member 31b. Specifically, in Fig. 10(b), a corner of the second sealing member 32b and a corner of the first sealing member 31b are disposed close to each other.

[0081] FIG. 10(c) shows the planar positional relationship between the first sealing member 31c and the second sealing member 32c according to the third modified example. In the above embodiment, the second sealing member 32 is arranged so as to overlap the first sealing member 31 when viewed from the vertical direction. However, as shown in FIG. 10(c), the second sealing member 32c does not have to overlap the first sealing member 31c when viewed from the vertical direction. In this case, it is preferable from the viewpoint of sealing property if the end of the first sealing member 31c abuts against the second sealing member 32c. In FIG. 10(c), the end face of the second sealing member 32c is arranged flush with the lower surface of the first sealing member 31c, but it is not necessary that they are flush with each other.

[0082] FIG. 11 is a cross-sectional view showing the positional relationship of the fixing portion 40, the first sealing member 31d, and the second sealing member 32d according to the fourth modification. Specifically, FIG. 11 is a view corresponding to FIG. 6. In the above embodiment, the plate portion 21 of the heat sink 20 is disposed inside the main housing 12, but as shown in FIG. 11, the plate portion 21d may be disposed outside the main housing 12d. In this case, the plate portion 21d is formed with a hole portion 211d through which the screw shaft 41 of the fixing portion 40 is inserted, and the main housing 12d is formed with a screw hole 125d into which the screw shaft 41 is screwed. The first sealing member 31d and the second sealing member 32d are fixed by the fixing portion 40 in a state of being in close contact with the main surface of the plate portion 21d in the negative Y-axis direction and the surface of the bottom of the main housing 12d in the positive Y-axis direction.

[0083] This will enable the production of highly reliable power supplies and power conditioners, which will contribute to Goal 7 of the United Nations Sustainable Development Goals (SDGs) - "Ensure access to affordable, reliable, sustainable and modern energy for all" and Goal 13 - "Take urgent action to combat climate change and its impacts."

[0084] [Other variations] Although the power supply device according to the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. In other words, the embodiment disclosed herein is illustrative in all respects and is not restrictive. The scope of the present invention is defined by the claims, and it is intended to include all modifications within the meaning and scope of the claims.

[0085] For example, in the embodiment, a power conditioner is exemplified as an example of a power supply device, but the power supply device according to the present invention is not limited to a power conditioner. The power supply device may be a simple switching power supply, an inverter other than the above, a converter, a UPS (uninterruptible power supply), or the like.

[0086] In addition, in the embodiment, a terminal block, a DC breaker, an AC breaker, a DC reactor, an AC reactor, a DC circuit board, an AC circuit board, a conversion element, and a main control circuit board are exemplified as electrical components accommodated in housing 10, but other heat-generating components may also be used.

[0087] In addition, in the embodiment, the case where the fins 22 protrude from the opening 121 is illustrated, but the fins do not have to protrude from the opening as long as they are inserted into the opening. Even in this case, the fins are easily exposed to the outside air.

[0088] In the embodiment, the fixing portion 40 is disposed on the opposite side of the opening 121 with respect to at least one of the first sealing member 31 and the second sealing member 32. However, the fixing portion may be disposed closer to the opening 121 than at least one of the first sealing member 31 and the second sealing member 32.

[0089] Any combination of the components included in the embodiments and their modifications is also included within the scope of the present invention. [Industrial Applicability]

[0090] The present invention is applicable to a power supply device having a heat sink. [Explanation of symbols]

[0091] 10. Chassis 11 Front cover 11a Front Panel 11b Edge 12, 12d Main housing 20 Heat sink 21, 21d plate part 22 Fin section 23 Screw holes 30 Sealing part 31, 31a, 31b, 31c, 31d first sealing member 32, 32a, 32b, 32c, 32d Second sealing member 40 Fixed part 41 Screw shaft (shaft) 42 Head 100 Power conditioner (power supply unit) 121 Opening 121a Hole 122 Legs 125d screw hole 211d Hole A Solar panel B Energy storage device C load

Claims

1. A housing having an opening; a heat sink attached to the housing so as to cover the opening; a sealing portion disposed around the opening and interposed between the housing and the heat sink; a fixing portion that fixes the housing, the heat sink, and the sealing portion in a state where the fixing portion does not penetrate the sealing portion sandwiched between the housing and the heat sink, the sealing portion includes a first sealing member arranged along the opening, and a second sealing member having an end portion adjacent to the first sealing member and arranged along the opening, the fixing portion has a shaft portion to be inserted into the housing and the heat sink, and a head portion provided at an end of the shaft portion, The head portion overlaps at least one of the first sealing member and the second sealing member when viewed in the axial direction of the shaft portion. power supply.

2. the heat sink has a plate portion that is disposed inward of the housing with respect to the opening, the sealing portion is disposed inside the housing and is interposed between the plate portion and the housing, The plate portion extends outward from the opening portion further than at least one of the first sealing member and the second sealing member when viewed in a direction perpendicular to the plate portion.

2. The power supply device of claim 1.

3. The heat sink has a plurality of fins protruding from the plate portion, The plurality of fins are inserted into the opening.

3. The power supply device of claim 2.

4. The first sealing member is disposed along a first direction, The second sealing member is disposed along a second direction intersecting the first direction and overlapping the first sealing member when viewed from the second direction. The power supply device according to any one of claims 1 to 3.

5. The second sealing member has the end portion abutting against the first sealing member.

5. The power supply device according to claim 4.

6. The first sealing member protrudes in the first direction further than the second sealing member when viewed in the second direction. The power supply device according to claim 4 or 5.

7. The opening is generally rectangular; The first sealing member is formed in a linear shape, and two of the first sealing members are arranged along the upper and lower sides of the opening, The second sealing member is formed in a linear shape, and two of the second sealing members are disposed along two sides of the opening in the second direction. The power supply device according to any one of claims 4 to 6.

8. When viewed from a third direction intersecting the first direction and the second direction, the fixing portion is disposed outside the opening with respect to the first sealing member or the second sealing member. The power supply device according to any one of claims 4 to 7.

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