JPH11122932A - Power unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power unit having a weight balance and a size, which are suitable for mounting the power unit on a wall. SOLUTION: The enclosure of a power unit is divided into a central chamber 6 and side chambers 4 and 5 on both sides of the central chamber 6, and at the same time, the central chamber 6 is further divided into a front chamber 6A and a rear chamber 6B. In the central chamber 6, a substrate 18 mounted with a power-converting element 17, such as power transistor, etc., which generates high heat on its front side and fitted with heat radiating fins 18F on its back side is arranged in the rear chamber 6B. and a substrate 51 mounted with an electronic circuit element composed of the other transistors, etc., is arranged own the front chamber 6A. On the other hand, a noise filter 22 composed of a reactor having a core, a capacitor, and a coil is arranged separately in the side chambers 4 and 5 on both sides of the central chamber 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for supplying electric power generated by a photovoltaic power generation system as a part of electric power for general household use, and more particularly to a power supply device capable of being used on a wall. The present invention relates to an arrangement structure of each component in the apparatus.

[0002]

2. Description of the Related Art In recent years, power systems that use clean energy, for example, natural energy such as sunlight, wind power, and geothermal energy, have been actively developed due to the depletion of resource energy and environmental conservation problems.

[0003] Among them, a solar power generation system (hereinafter also referred to as a photovoltaic power generation system) is advantageous in that the system is small and inexpensive in terms of equipment cost and the like.
In addition, due to the development of solar cells having high power conversion rates and improved performance, power demand in ordinary households can be almost satisfied.

In order to use the photovoltaic power generation system in ordinary households, a power supply device for converting the obtained DC power into AC power and supplying power is required.

Here, the power supply device for power conversion includes power circuit components such as a hybrid IC mounted with a power transistor for power conversion, a smoothing (electrolytic) capacitor and a reactor, and other control ICs and transistors. Built-in inverter section consisting of a control board etc. with many electronic circuit components such as resistors, and also has many input / output terminals and connectors, etc., and cooling air provided to promote heat radiation of internal circuit components It has a structure in which a road and its cooling fan are mounted.

[0006] The power supply device can be used both outdoors and indoors, and has good versatility.

[0007]

However, when the power supply device is installed outdoors, the weight of the power supply device is about 20 kg. Therefore, if the power supply device is directly installed on the outer wall of a house, the outer wall may be damaged. Considering that the workability should be good so that it can be freely installed in a suitable place, it is convenient to use a separate mounting plate made of iron plate etc. so that the power supply can be mounted and supported on it. is there.

However, the problem here is that when the power supply device can be mounted on a wall as described above, for example, a power circuit component is a heavy or bulky component such as a reactor having an iron core or an electrolytic capacitor. Since it is used frequently, it has been difficult to make the weight balance and size (particularly depth thickness) of the device suitable for wall hanging.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to provide a power supply device in which the weight balance and size (particularly, depth thickness) of the device are suitable for hanging on a wall.

[0010]

In order to achieve the above-mentioned object, the present invention has a built-in inverter unit for converting DC power generated by a solar cell into AC power for home use. In a power supply device that can be mounted on the inner and outer wall surfaces of a house, for example, the housing is divided into a central room and side rooms on both sides thereof, and the central room is further divided into front and rear to form a front room. A rear chamber is formed, and in the rear chamber of the central chamber, a substrate on which a power conversion element such as a power transistor that generates a large amount of heat is mounted and a radiating fin is mounted on the rear side is disposed. Is characterized in that a substrate on which other electronic circuit elements such as transistors are mounted is arranged, and a noise filter including a reactor having an iron core and a capacitor or a coil is separately arranged in side chambers on both sides of the central chamber. It is intended to.

[0011] Further, a wind tunnel for supplying cooling air to a rear chamber and both side chambers of the central chamber is provided below the central chamber, and the wind tunnel is formed so as to become narrower downward. A blower that sucks in outside air and blows the air into the wind tunnel is disposed on one side of the narrow portion, and an electrolytic capacitor is disposed on the other side.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the power supply device 1 is a box-shaped main body that is slightly laterally elongated.
Are formed. Further, the upper surface of the housing 2 is formed on an inclined surface 3 having a certain inclination angle, for example, 10 degrees or more so that the front half thereof is lowered toward the front side, and when the power supply device 1 is installed outdoors, We make it easy for rain that has fallen to flow.

Next, the structure of the power supply device 1 will be described with reference to FIGS.
When viewed from the front, left and right side chambers 4 and 5 communicating with each other via a lower space 15 and a central chamber 6 wider than the left and right side chambers 4 and 5 are viewed from the front. In the vacant chamber 15 below the central chamber 6, various electric parts provided in the left and right side chambers 4, 5 and the central chamber 6 are cooled as described later. In addition, a wind tunnel 7 having a special shape as shown in FIGS.

As shown in FIGS. 7 to 10, the wind tunnel 7 has a wind tunnel main body 7A having upper and left ends open as openings 27 and 28, and a screw 50 at its left end opening 28. And a front plate 7B closed and fixed by the front plate 7B.
At a position closer to one side than the center of B, the suction air port 8 is formed as a substantially square opening, and a slightly elongated air outlet 25 is provided at a substantially central position slightly above the suction air port 8. I have. An eave 16 is formed in the outlet 25 as a shielding member for preventing rainwater that enters from an exhaust port 32 (see FIG. 13) to be described later and falls downward from being blown out together with the blowing wind. . A rectangular rod-shaped heat insulating material 8A is bent and attached to the periphery of the suction air port 8 of the wind tunnel 7.

The eaves 16 are provided from the upper end position of the air outlet 25 into the wind tunnel 7 so as to block the blowing of rainwater in accordance with the air flow described later in the wind tunnel 7 and not to increase the ventilation resistance of the blown wind too much. It is formed to be inclined at a predetermined angle (here, 45 °). The width of the outlet 25 is slightly smaller than the width of the outlet 25, and the leading end is located slightly below the center of the outlet 25. With this configuration, even when the present apparatus is installed outdoors, it is possible to prevent rainwater from splashing on a motor portion of the blower 9 described later in rainy weather, and to use a shielding member without using a separate member. Outlet 2
5 can be formed simply and inexpensively simply by leaving the eaves 16 uncut and bending inward at a predetermined angle (45 °).

On the other hand, the upper side of the front plate 7B is bent outward in accordance with the left end opening 28 of the wind tunnel main body 7A.
A gentle slope 26A is formed. The bottom plate of the wind tunnel body 7A has a gentle slope 26B from the right end to almost the center,
From there, a steep slope 26C is formed, and at the lowest part, an opening 29A communicating with a drain port 29 (see FIG. 11) opening on the bottom side of the housing 2 is formed. Therefore, the blower 9 described later
The outside air blown into the wind tunnel 7 through the air inlet 8 from the air blows into the wind tunnel 7 and rises almost immediately above the steep slope 26C, and spreads over the entire upper opening 27 along the gentle slopes 26A and 26B. The part is returned to the outlet 25 from above and is blown out.

At this time, the rainwater which enters through the exhaust port 32 and falls in rainy weather is covered by the eaves 1 provided in the blowout port 25.
6 and fall down as water droplets,
The water is drained from the drain port 29 through A. Also, rainwater that has fallen on both gentle slopes 26A, 26B and steep slope 26C becomes water droplets, flows down each slope 26A to 26C, and is quickly drained from drain port 29. Further, water droplets flowing down from the gentle slope 26A on the upper side of the outlet 25 also
Since the eaves 5 have the eaves 16, the eaves 16 fall down and are drained from the drain port 29 without being blown out by the blowing wind.

On the other hand, reference numeral 9 in FIGS. 2 and 4 denotes a blower for sucking outside air and blowing it into the wind tunnel 7 through the suction air port 8, and is provided below the left chamber 4 as described above. It is installed using the space on the left side of the wind tunnel 7 formed so as to become narrower toward. This blower 9
It comprises a shading motor 10M and a sirocco fan 11 driven to rotate by the motor 10M. The shading motor 10M is located in front of the air outlet 25 of the wind tunnel 7 so as to blow the cooling air from the air outlet 25 over the entirety. And the bottom is covered with an open fan cover 11A. And, as shown in FIG. 11, a plurality of slit holes 14 are provided in the left area of the bottom plate 13 of the housing 2 to form a plurality of slit holes 14.

The central chamber 6 further includes a front chamber 6A.
And the rear room 6B. And the front room 6A
The board (chassis) 51 erected as shown in FIG.
Is provided with a control device formed by mounting IC components, transistors, resistors, and various other electronic circuit components.

As shown in FIGS. 2 and 3, a hybrid IC 17 mounted with a power transistor generating a large amount of heat is disposed in the rear chamber 6B.
Reference numeral 17 is attached to the center of the substrate portion of the heat radiating plate 18 having a large number of radiating fins 18F integrally formed on the back side thereof.

Further, the right room 5 on the right side of the central room 6
A terminal plate (not shown) having a large number of terminals such as a solar cell and input / output terminals for the power supply device 1 and home power wiring and input / output terminals for the power supply device 1 is provided at a lower position of the power supply device 1. A recess is provided and accommodated, and the opening of the recess is closed by a detachable lid 21 (see FIG. 1). Further, an electric part such as a noise filter 22 for AC / DC conversion, which includes a coil (L) and a capacitor (C), is accommodated in an upper portion thereof. Further, a plurality of smoothing (electrolytic) capacitors 23 having different thicknesses (capacities) are bundled together by a stop band 24 and attached and held by utilizing a space below the right side of the wind tunnel 7.

As shown in FIG. 22, a plurality of reactors 19 having different capacities are provided in the left chamber 4 by using the left wall 6L of the central chamber 6 in an inclined state and in a vertical direction, as shown in FIG. They are installed at appropriate intervals. Here, the reason for providing the reactor 19 at an angle is that the reactor 19 sends a part of the cooling air entering the central chamber 6 to the left chamber 4 from below through a lower gap communicating with the left chamber 4. This is because the ventilation is smoothly performed without causing the resistance of the cooling air, and the cooling effect of the reactor 19 is improved.

As described above, the inside of the housing 2 of the power supply device 1 is divided into a plurality of chambers 4, 5 and 6, and various electric parts are installed in each of the chambers. These parts generate heat. For,
Cooling air is taken in through the wind tunnel 7. That is, the cooling air flows from the opening 27 opening above the wind tunnel 7 to the rear chamber 6B in which the hybrid IC 17 in which the power transistor of the central chamber 6 is mounted is accommodated.
Is blown to the shading motor 10M from the elongated outlet 25 provided in the front plate 7B, and cooling air is further sent to the left chamber 4. A part of the outside air taken into the wind tunnel 7 is partly blown from the opening 27 to the left chamber 4 and the right chamber 5 through the lower end side gap of the central chamber 6. Incidentally, reference numeral 92 shown in FIGS. 4 to 6 and the like denotes a heat insulating material, which is inserted into the assembly surface of the housing 2.

Here, the structure for blowing the cooling air to the central chamber 6 will be further described. As shown in FIG. 12, a ventilation port 54 for the radiation fin 18F is formed in the bottom plate 53 of the central chamber 6 in a rectangular shape. In addition to being formed and provided, one ventilation slit hole 55 is provided in parallel with the ventilation port 54 so as to ventilate the hybrid IC 17 itself having a power transistor.

The air passage structure as described above is formed inside the power supply device 1. Therefore, when the blower 9 is driven, the outside air is sucked in from the slit hole 14 on the bottom surface of the housing 2 by the rotation of the sirocco fan 11. Then, after entering the wind tunnel 7 from the suction air port 8, the air is blown to the left chamber 4 and the rear chamber 6B from the air outlet 25, the air port 54, and the air slit 55. As described above, the rear chamber 6B communicates with the left chamber 4 and the right chamber 5 through the gap formed at the lower portion, and a part of the cooling air flowing into the rear chamber 6B is introduced into the left chamber 4 and the right chamber 5 as well. Therefore, cooling air flows through the left chamber 4, the rear chamber 6B, and the right chamber 5 to cool the electrical components in each chamber.

The cooling air after passing through each of the chambers 4, 5, and 6B is exhausted to the outside. The exhaust ports of the left and right chambers 4 and 5 are shown in FIG. As described above, the exhaust ports 30 and 31 are formed of three slit holes 30S and 31S provided in the upper part of the rear wall 2D, and the rear chamber 6B also corresponds to the rear chamber 6B. In the upper part of the rear wall 2D of the portion, as shown in FIG.
An exhaust port 32 made of 2S.

As described above, the side chambers 4 formed on both sides of the central chamber 6 composed of the front chamber 6A and the rear chamber 6B.
By disposing the heavy and bulky reactor 19 and the noise filter 22 composed of a condenser and a coil separately on the device 5, the weight balance between the right and left sides of the device can be made suitable for hanging on a wall, and the device can be made thin. Can be Further, a wind tunnel 7 having a width narrowing downward is provided below the central chamber 6, and a space formed on both sides of the wind tunnel 7 is effectively used to provide a blower 9 or By arranging the condenser 23, not only the left and right sides of the apparatus but also the upper and lower weight balance can be made suitable for wall hanging, and the apparatus can be made thinner in the same manner as described above.

On the other hand, in the power supply device 1 having the above-described internal structure, a breaker 60 that performs a power cutoff operation when the power consumption exceeds the output power is provided at the bottom of the power supply device 1 as shown in FIG. The portion is provided at a position closer to the front.

The mounting structure of the breaker 60 will be described.
As shown in FIG. 11, the bottom plate 13 of the power supply device 1 is an insertion hole for mounting the breaker 60, and is a circular operation hole 61 into which a finger enters when the breaker 60 that has been shut off is returned. Are formed. The breaker 60 has a cylindrical shape, and a large-diameter skirt portion 60
b. Further, at the bottom end of the breaker 60, a push operation type breaker return switch 62S is provided.

A concave portion 63 is formed at the bottom of the power supply device 1 and communicates with the operation hole 61 and is formed by being depressed upward at a required height. Therefore, the recess 63 exists at the bottom of the power supply device 1 like a raised bottom, and the recess 63
A circular mounting hole 64 for mounting the cylindrical breaker 60 is formed in the upper bottom.

A ring-shaped eyelet 65 made of rubber is fitted and fixed to the inner peripheral edge of the circular mounting hole 64.

When the breaker 60 is inserted from below through the operation hole 61 into the mounting hole 64 into which the eyelet 65 is fitted, the breaker 60 is press-fitted into the eyelet 65 and Installed and fixed. In this case, a rubber eyelet 65 fitted with the breaker 60 is used.
Functions as a waterproof member. When the breaker 60 is mounted, the shoulder of the skirt portion 60b of the breaker 60 abuts on the edge of the mounting hole 64 to perform positioning.

Thus, the breaker 60 is mounted at a position slightly deeper (floating) above the bottom plate 13 of the housing, so that the power supply device 1 is installed outdoors such as by mounting it on an outer wall of a house. Even if it is done, it will be difficult for rainwater to enter from the bottom in rainy weather. In addition, rubber eyelets 65
Since the rainwater can be effectively prevented from entering from the mounting portion of the breaker 60, the waterproofness is more improved, and the failure of the breaker 60 or the short-circuit of the internal electric component and the failure of the power supply device 1 can be prevented. it can.

When the breaker 60 provided at the bottom of the housing of the power supply unit 1 is provided with the waterproof structure and the power is excessively used, the power is cut off, and after the power is turned off, the operation load is reduced. By inserting a finger (indicated by an arrow in FIG. 20) from below through the hole 61 and pressing the breaker return switch 62S in the concave portion 63, the breaker 60 can be easily returned.

The place where the breaker 60 is provided as described above is as follows.
Since it is the bottom of the power supply device 1, it is hard to see, and its location can only be known by a specific person such as the user of the power supply device 1, thus avoiding mischievous operations.

In order to return the breaker 60 without exposing the breaker 60, a gesture of intentionally pushing a finger into the concave portion 63 recessed in the bottom must be performed. Can be disabled, and malfunction can be prevented.

Here, when the power supply device 1 is installed outdoors, an electric cord for connection from the bottom of the power supply device 1 is connected from the bottom of the power supply device 1 for relay connection between the solar cell device and the household power supply line. Each of the two electric cords 80 is pulled out downward through a cord extraction hole 81 provided in the bottom plate 13 of the casing 2 as shown in FIG. Measures are taken such as passing through a protective pipe for coating, etc., and the cord is connected externally to the solar cell device. To connect.

By the way, the power supply device 1 can be installed indoors and used. In this case, the power supply 1
The electric cord 80 for connection from the bottom of the power supply device 1 is not pulled down from the bottom of the power supply device 1 as in the case of external installation from the aesthetic aspect of the indoor situation, and is shown in FIGS. As described above, the connection electric cord 80 is pulled out horizontally along the bottom rear surface side of the power supply device 1 to connect with the home power supply line, and the solar cell device is connected to the electric cord 80 from the inner wall of the house to the outside. Connect through.

In addition to the above-described cord connection processing, as shown in FIG. 21, the bottom of the power supply 1 is provided with a bottomed box so that the electric cord 80 at the bottom of the power supply 1 is not exposed. The wiring cover 66 is mounted.

As shown in FIG. 18, the bottomed box-shaped wiring cover 66 has a frame height T, and has a U-shape so that three sides are formed by a front surface 67A and left and right side surfaces 67B. A frame 67 having upper and lower mounting flanges 67F, and a cover bottom plate 68 as shown in FIG. 19, which is mounted and fixed by a lower edge mounting flange 67F so as to close the bottom opening 67K of the frame 67. Consists of In addition, a slit hole 69 is formed in the cover bottom plate 68 so as to coincide with the slit hole 14 that is the suction port 12 of the bottom plate 13 of the power supply device 1 to form an outside air suction port 69A. In addition, one end side of the frame 67 (facing the front surface 67A).
The open portion 72 is provided with an electric cord 80 which is pulled out horizontally.
In the case of drawing out to the outside through a wall of a house or the like.

The bottomed box-shaped wiring cover 66
However, with the upper edge flange 67F, four places are screwed to the bottom of the power supply device 1 with screws or the like, and the power supply device 1 is mounted and fixed like a bottom stand.

As described above, the bottomed box-shaped wiring cover 66
Is attached, the electric cord 80 is hidden,
The appearance is good and the appearance is maintained. However, when the wiring cover 66 is attached, the operation hole 61 is closed, and the return operation of the breaker 60 cannot be pressed from below.

Therefore, a circular finger insertion hole 71 into which a finger can be inserted from the near side is formed in the front surface 67A of the bottomed box-shaped wiring cover 66 in correspondence with the operation hole 61 of the breaker 60. In this case, as shown in FIG. 21, the finger (for example,
Index finger; indicated by an arrow) into this finger insertion hole 71,
If the fingertip is further inserted into the operation hole 61 and the breaker return switch 62S of the breaker 60 is pushed upward, the switch can be pressed, and the return operation of the breaker 60 can be performed easily as in the case where the wiring cover 66 is not provided.

A protective guard made of a metal plate bent in a U-shape is provided inside the finger insertion hole 71 so that the inserted finger tip does not enter too deeply to touch the electric cord 80 or the wiring. A plate 74 is provided. Thereby, safety when operating the breaker 60 is also maintained.

When the power supply device 1 is installed outdoors,
As shown in FIG. 15 to FIG.
Is attached and fixed thereto. That is, a pair of locking pieces 37, 37 having hooks 37 f at the ends provided on the mounting plate 33 are attached to the rear wall 2 of the power supply 1.
By hooking the upper locking holes 35A, 35B provided in the direction D, the hooks 37f of the locking pieces 37, 37 and the locking holes 3
The engagement projections 36 of 5A and 35B are hooked, so that they can be easily attached and fixed. Further, as described above, in the power supply device 1, since the respective components are arranged in a well-balanced manner and are formed thin, the mounting plate 33
Can be stably mounted and fixed. However, when the power supply device 1 is mounted in close contact with the mounting plate 33, the exhaust slit holes 30S, 31S, and 32S are blocked, and the discharge of the cooling air becomes poor, resulting in insufficient cooling. , 31S, 32S and the spacing plate 38 having the abutting portion 38m at four locations around the mounting plate 33, larger than the locking pieces 37, 37 so that a space (gap G) can be maintained between the mounting plate 33 and the mounting plate 33. It protrudes with a length shorter by b. Further, the width of the locking holes 35A and 35B is
7 and 37, the locking hole 35
A, 35B and the engaging pieces 37, 37 are easily engaged with each other, so that the power supply device 1 can be easily suspended and fixed to the mounting plate 33.

Also, even if rain enters from the exhaust ports 30, 31, it flows downward, and finally drains outside as shown by the arrows using the locking holes 35A, 35B as shown in FIG. As shown in FIG. 14, the rain intrusion prevention guard 40 that can form the water passage 41 for
The power supply device 1 is attached to the inner surface side of the rear wall 2D so as to face 0 and 31. This rain intrusion prevention guard 4
No. 0 is formed by bending an iron plate or the like into a U-shaped cross section, and secures the left and right mounting pieces 40m and the lower mounting piece 40n with screws or the like.

As a result, as shown in FIG.
Even if tentatively enters through the exhaust ports 30 and 31, it falls down by hitting the inner wall 40 b of the rain intrusion prevention guard 40 or hitting the inner surface 2 d of the rear wall, and falls from the bottom surface 41 b.
A and 35B are discharged using the discharge port, so that the power supply device 1
To prevent the power supply device 1 from being broken down due to a short circuit or the like.

In the above embodiment, the eaves 16 provided at the air outlet 25 of the wind tunnel 7 are formed such that the tip thereof is located slightly below the center of the air outlet 25.
Is formed below the lower edge of the outlet 25, the ventilation resistance is increased by that amount, but the rainwater can be more reliably prevented from blowing out.

[0050]

As described above, according to the present invention, a heavy or bulky reactor, a condenser, and a coil are separately arranged in side chambers formed on both sides of a central chamber including a front chamber and a rear chamber. Thereby, the weight balance between the left and right sides of the device can be made suitable for hanging on a wall, and the device can be made thin.

Further, a lower portion of the central chamber is provided with a wind tunnel which becomes narrower downward, and a space formed on both sides of the wind tunnel is effectively used to provide a heavy blower or an electrolytic condenser. By arranging, the weight balance of the device in the left and right and up and down directions can be made suitable for hanging on a wall, and the device can be made thinner.

[Brief description of the drawings]

FIG. 1 is an overall view of a power supply device of the present invention, in which FIG. 1 (a) is a front view, FIG. 1 (b) and FIG. 1 (c) are left and right side views, and FIG.

FIG. 2 is an internal structural view of the power supply device in which the inside of the power supply device is divided into three rooms of a central room including left and right side chambers and two front and rear rooms and has a breaker at a bottom portion. The front view explaining the structure in a room.

FIG. 3 is a top structural view of the same.

FIG. 4 is an internal structural view of the power supply device, and is a front view illustrating a structure in a front chamber of two front and rear chambers.

FIG. 5 is a top structural view of the same.

FIG. 6 is a diagram showing a mounting structure of a capacitor.

FIG. 7 is a front view showing a wind tunnel for sending cooling air to each of the three chambers and the fan motor of the power supply device.

FIG. 8 is a left side view of the same.

FIG. 9 is a top view of the same.

FIG. 10 is a sectional view taken along line AA of FIG. 8;

FIG. 11 is a bottom view of the power supply device in which an outside air suction port communicating with the wind tunnel is formed.

FIG. 12 is a plan view showing a cooling air blowing port and a blowing slit formed in a lower bottom portion of the central chamber.

FIG. 13 is a rear view of the power supply device in which an exhaust port through which cooling air that has passed through each of the three chambers of the power supply device is discharged is formed, and a cross-sectional view taken along the line AA showing the structure of the exhaust port portion.

FIG. 14 is a rear view of the rear wall of the power supply device, showing a state in which rainwater intrusion prevention guards for letting out rainwater entering from the exhaust ports in the left and right side chambers to the outside of the power supply apparatus are provided inside the exhaust port. FIG.

FIG. 15 is an external view of a wall hanging plate for attaching the power supply device to an outdoor wall surface or the like.

FIG. 16 shows a case where a power supply device is mounted on an outer wall of a house using a wall hanging plate,
FIG. 4 is a mounting structure diagram of a power supply device for explaining a mounting method enabling installation at a distance so as not to block an exhaust port.

FIG. 17 is an explanatory view showing an aspect in which rainwater intruding by a rainwater intrusion prevention guard flows out to the outside when a power supply device is attached.

18A and 18B are diagrams showing a frame which is one member forming a wiring cover, wherein FIG. 18A is a front view, FIG.
(C) The figure is a right side view.

FIG. 19 is a plan view of a cover bottom plate as the other member forming the wiring cover.

FIG. 20 is a schematic side sectional view of a power supply device having a breaker mounted on a bottom portion.

FIG. 21 is a schematic cross-sectional side view of the power supply device when the power supply unit is used indoors, with a wiring cover configured to allow a breaker return operation to be attached to a lower portion.

FIG. 22 is a schematic side view showing an arrangement structure of a reactor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power supply unit 2 Case 4,5 Left and right side chamber 6 Central chamber 7 Wind tunnel 8 Suction air port 9 Blower 10M Shading motor 11 Sirocco fan 12 Suction port 16 Eave 19 Reactor 22 Noise filter 23 Electrolytic capacitor 25 Air outlet 26A, 26B Slow slope 26C Steep slope 29 Drain hole 30, 31, 32 Exhaust port 60 Breaker

Claims (2)

[Claims] An inverter unit for converting DC power generated by a solar cell into AC power for home use in a housing,
In a power supply device that can be mounted on a wall by, for example, installing the housing on the inner and outer wall surfaces of a house, the housing is partitioned into a central room and side chambers on both sides thereof, and the central room is further partitioned forward and backward. Forming a front chamber and a rear chamber, and a rear chamber on which a power conversion element such as a power transistor having a large heat generation is mounted and a radiating fin is mounted on the rear side is disposed in the rear chamber of the central chamber; In the front chamber, a substrate on which other electronic circuit elements such as transistors are mounted is arranged, and in the side chambers on both sides of the central chamber, a reactor having an iron core and a noise filter including a coil and a capacitor are separately arranged. A power supply device, characterized in that: 2. A lower part of the central chamber is provided with a wind tunnel for supplying cooling air to a rear chamber and both side chambers of the central chamber, and the wind tunnel is formed so as to become narrower downward. The power supply device according to claim 1, wherein a blower that sucks in outside air and blows into the wind tunnel is arranged on one side of the narrow portion, and an electrolytic capacitor is arranged on the other side.