Power supply device

Abstract

The present invention provides a power supply device that can uniformly cool each power supply unit, even when the number of power supply units increases or decreases. [Solution] The power supply unit comprises a housing, a connection part provided at one end, and a ventilation part provided at the other end opposite to the one end and connected to the outside of the housing, a main duct provided inside the housing, one or more cylindrical sub-ducts that are detachable from the connection part, and one or more power supply units provided in a one-to-one ratio for the one or more sub-ducts, with one or more power supply units housed inside each of the one or more sub-ducts.

Description

Technical Field

[0001] The present invention relates to a power supply device with improved reliability.

Background Art

[0002] An uninterruptible power supply device is known (see, for example, Patent Document 1). In this device, an exhaust duct is formed inside the housing. Cooling air is supplied to one power conversion module, and the air is discharged to the outside through one duct. Similarly, cooling air is supplied to another power conversion module, and the air is discharged to the outside through another duct different from the one duct.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Disclosure of the Invention

Problems to be Solved by the Invention

[0004] The number of power conversion modules varies depending on the product specifications and may increase or decrease depending on the product. On the other hand, when the number of power conversion modules increases, it is necessary to arrange the power conversion modules at a high density, and there is a risk that the cooling of the power conversion modules at the locations arranged at the high density cannot catch up. Then, the temperature becomes locally high at that location, and there is a possibility of causing problems such as failures in the power conversion modules.

[0005] Therefore, an object of the present invention is to provide a power supply device that can uniformly cool each power supply unit even when the number of power supply units increases or decreases.

Means for Solving the Problems

[0006] The above problems are solved by the present invention as follows. That is, the power supply device of the present invention (1) is The casing and A main duct is provided inside the housing, having a connecting portion at one end and a ventilation portion at the other end opposite to the first end and connected to the outside of the housing. One or more cylindrical sub-ducts that are detachable from the aforementioned connection part, One or more power supply units are provided in a one-to-one ratio for the one or more subducts, and each of the one or more power supply units is housed inside the one or more subducts. It is equipped with.

[0007] Furthermore, the power supply device of the present invention (2) is the power supply device described in (1), The aforementioned connection part is One or more openings to which the aforementioned one or more subducts can be connected, A closing member that can be attached to the main duct to close the one or more openings at locations where the one or more subducts are not connected, It has.

[0008] Furthermore, the power supply device of the present invention (3) is the power supply device described in (1) or (2), Each of the one or more subducts is: An air outlet connected to the one or more openings, An air inlet is provided at the end opposite to the aforementioned air outlet, A fan capable of sending air from the air inlet toward the air outlet, It is equipped with.

[0009] Furthermore, the power supply device of the present invention (4) is the power supply device described in any one of (1) to (3), The aforementioned enclosure is An opening provided on the extension line of the direction of attachment and detachment of the subduct from the connection portion, the opening being able to remove the subduct from inside the housing or house the subduct inside the housing, A door section that can close the opening or open the opening, It is equipped with.

[0010] Furthermore, the power supply device of the present invention (5) is the power supply device described in any one of (1) to (4), The housing has an air intake port for taking in outside air and an air filter section provided adjacent to the air intake port.

[0011] Furthermore, the power supply device of the present invention (6) is the power supply device described in any one of (1) to (5), The housing has an air filter section near the exhaust port on the opposite side of the intake port.

[0012] Furthermore, the power supply device of the present invention (7) is the power supply device described in any one of (1) to (6), The pressure loss of the air filter section adjacent to the exhaust port is smaller than the pressure loss of the air filter section adjacent to the intake port.

[0013] Furthermore, the power supply device of the present invention (8) is the power supply device described in any one of (1) to (7), The control circuit housed within the aforementioned enclosure, A plurality of passages provided in the main duct at a position between the connection portion and the ventilation portion, which send air from the main duct to the control circuit and recover the air sent to the control circuit, It is equipped with.

[0014] Furthermore, the power supply device of the present invention (9) is the power supply device described in any one of (1) to (8), The control circuit housed within the aforementioned enclosure, A passage provided in the middle of the subduct for sending air from the subduct to the control circuit, A passage is provided in the main duct at a position between the connection part and the ventilation part to recover the air sent to the control circuit, It is equipped with. [Effects of the Invention]

[0015] According to the present invention, even when the number of power supply units increases or decreases, a power supply device capable of uniformly cooling each power supply unit can be provided.

Brief Description of the Drawings

[0016] [Figure 1] It is a block diagram showing the overall configuration of the power supply device of the first embodiment. [Figure 2] It is a perspective view showing the power supply device shown in FIG. 1 with the door portion of the housing open. [Figure 3] It is a cross-sectional view along the vertical direction of the power supply device shown in FIG. 2. [Figure 4] It is a perspective view showing the main duct and the driver unit of the power supply device shown in FIG. 2. [Figure 5] It is a perspective view schematically showing the state of attaching and detaching the driver unit to and from the main duct shown in FIG. 4. [Figure 6] It is a perspective view showing a first modification example of the power supply device shown in FIG. 2. [Figure 7] It shows a second modification example of the power supply device shown in FIG. 2, and is a front view showing the inside of the housing with the door portion of the housing omitted. [Figure 8] It is a perspective view showing one of the driver units shown in FIG. 7 enlarged. [Figure 9] It shows a third modification example of the power supply device shown in FIG. 2, and is a cross-sectional view along the vertical direction of the power supply device. [Figure 10] It is a cross-sectional view along the vertical direction of the power supply device of the second embodiment. [Figure 11] It is a perspective view showing one of the driver units of the power supply device shown in FIG. 10 enlarged. [Figure 12] It is a cross-sectional view along the vertical direction of the power supply device of the third embodiment. [Figure 13] It shows a fourth modification example of the power supply device of the third embodiment, and is a cross-sectional view along the vertical direction of the power supply device.

Embodiments for Carrying Out the Invention

[0017] Embodiments of the power supply device of the present invention will be described below with reference to the drawings. The power supply device of the present invention can supply power to a light source such as a UV irradiator (LED) 32. In the following description, as shown in Figure 2, the forward direction will be F, the rear direction will be R, the width direction will be W, and the height direction will be H. [First Embodiment]

[0018] Referring to Figures 1 to 8, the power supply unit 11 of the first embodiment will be described. As shown in Figures 1 to 4, the power supply unit 11 comprises a housing 12, a main duct 13 provided inside the housing 12, one or more cylindrical sub-ducts 15 that can be attached to and detached from the connection part 14 of the main duct 13, a control circuit 16 housed inside the housing 12, a power supply unit 17 housed inside the sub-duct 15, an operating section (operating panel) 22 and instruments 21 provided adjacent to the window part 18 (opening) of the door part 12A of the housing 12, an air filter section 23 provided in the door part 12A of the housing 12, and an exhaust fan 25 provided adjacent to the ventilation part 24 (exhaust port) of the main duct 13. The sub-ducts 15 and the power supply unit 17 constitute a driver unit 26 that can be attached to and detached integrally with the main duct 13. By operating the operating section 22, the operator can perform various operations on the appearance device 11. The instruments 21 display various statuses of the power supply unit 11. The fan 25 may be installed at any position in the flow path, which consists of the main duct 13 and the sub-duct 15, etc.

[0019] The housing 12 is formed of, for example, a metal material. The housing 12 has an opening 27 provided on the front of the power supply unit 11, and a door portion 12A that can close or open the opening 27. During maintenance, workers can perform maintenance work with the door portion 12A open.

[0020] As will be described later, the opening 27 is located on the extension line A (see Figures 2, 4, and 5) of the attachment / detachment direction of the subduct 15 attached to the connection part 14. Therefore, during maintenance, workers can remove the subduct 15 from inside the housing 12 or store the subduct 15 inside the housing 12 through the opening 27.

[0021] The door section 12A has an air intake port 28 that penetrates in the thickness direction. The air intake port 28 is provided to draw outside air into the housing 12. An air filter section 23 is detachably attached to the door section 12A adjacent to the air intake port 28 so as to cover the air intake port 28. The power supply unit 11 is used for maintenance such as repairs when the door section 12A is open.

[0022] As shown in Figure 5, etc., the main duct 13 is formed by bending and welding a metal plate, for example, to create a duct shape. The main duct 13 has an "L" shape when viewed from the side. The main duct 13 has a connection part 14 provided at one end (lower end) and a ventilation part 24 (exhaust port) provided at the other end (upper end) opposite to the one end. The ventilation part 24 is provided on the top surface of the housing 12 and is connected to the outside of the housing 12 to discharge the air inside the main duct 13 to the outside. An air filter part 23 may be provided inside the housing 12 adjacent to the ventilation part 24. In this case, it is desirable that the pressure loss of the air filter part 23 provided adjacent to the ventilation part 24 (exhaust port) be set to be smaller than the pressure loss of the air filter part 23 provided adjacent to the intake port 28, in order to reduce the overall pressure loss of the device.

[0023] The air filter unit 23 can be installed anywhere within the housing 12, but it is preferable that it be located at the end of the flow path, which consists of the main duct 13 and sub-duct 15, etc., considering the performance of the dustproof function and ease of maintenance (e.g., replacement of the air filter unit 23). The pressure loss of the air filter unit 23 can be increased or decreased as appropriate by adjusting the mesh opening and pore size.

[0024] The connection section 14 has, for example, two openings 14A, each of which is connected to a subduct 15. The number of openings 14A in the connection section 14 may be one or three or more. The ventilation section 24 is mainly used for exhaust, but its location is not limited to the top surface. The ventilation section 24 may be provided on the side of the housing 12 or on the bottom surface of the housing 12.

[0025] Fan 25 is a commercially available, general-purpose fan (axial fan), but is not limited to this; it may also be a blower fan. Fan 25 is located at the top of the housing 12. The number of fans 25 can be changed; increasing the number of fans 25 increases the airflow rate, thus accommodating cases where the power supply unit 17 generates a large amount of heat. Fan 25 can discharge air from the main duct 13 to the outside of the housing 12. In this embodiment, two driver units 26 (sub-ducts 15) are connected to two openings 14A. Note that fan 25 may also be an intake fan. In this case, the airflow within the housing 12 is reversed, and outside air can be drawn into the main duct 13 and supplied to the driver units 26 (sub-ducts 15). The air that has cooled the driver units 26 is discharged to the outside of the housing 12 through the intake port 28. Note that if fan 25 is a blower fan, its arrangement is not limited to the above, and the blower fan may be placed near the intake port 28. Furthermore, it is also possible to create a hole in the main duct 13 or sub-duct 15 to bring the blower fan's intake port outside the duct and direct the exhaust air from the blower fan directly towards the power supply unit 17, which is the heat source.

[0026] The subduct 15 is rectangular in shape and has an air outlet 15B at one end (rear end) and an air inlet 15A at the opposite end (front end). The subduct 15 is formed, for example, by bending and welding a metal plate to form a duct. The power supply unit 17 is housed inside the subduct 15. The subduct 15 is connected to the connection part 14 at the air outlet 15B. The subduct 15 can be fixed to the main duct 13 by means of, for example, screws, hooks, pins, or other means.

[0027] One or more power supply units are provided in a one-to-one ratio for one or more subducts. As shown in Figure 1, the power supply unit 17 includes a power supply circuit 31 that is connected to an external AC power supply 19 and converts AC current to DC current, and a drive circuit 33 that adjusts the voltage of the power from the power supply circuit 31 and is connected to a UV irradiator 32, etc., and directly supplies power to the individual LEDs in the UV irradiator 32. The power supply circuit 31, which carries a large current when the UV irradiator 32 is in use, releases a large amount of heat into the surroundings compared to other components.

[0028] The control circuit 16 can control the drive circuit 33 to switch the power supply to the UV irradiator 32 on and off.

[0029] Next, with reference to Figure 3, the heat dissipation function of the power supply unit 17 in the power supply device 11 of this embodiment will be explained. When UV irradiation is performed in the UV irradiator 32 for a certain period of time, the power supply unit 17 becomes hot and releases heat into the surroundings. On the other hand, when the UV irradiator 32 and the power supply device 11 are running, the fan 25 is constantly rotating, and the air in the main duct 13 is discharged to the outside of the housing 12. Therefore, the air taken into the housing 12 through the intake port 28 of the door section 12A passes through the air filter section 23 to remove dust and other debris, and is then taken into the sub-duct 15 from the air inlet 15A of the sub-duct 15 and passes around the power supply circuit 31 and the drive circuit 33. At that time, the air passing around the power supply circuit 31 and the drive circuit 33 takes heat from the power supply circuit 31 and the drive circuit 33 and moves into the main duct 13 via the air outlet 15B of the sub-duct 15 and the connection part 14 of the main duct 13. The air in the main duct 13 is discharged to the outside of the enclosure 12 by the fan 25. In this embodiment, since the power supply units 17 are separated from each other by the sub-ducts 15, even if the power supply units 17 are arranged at high density, it is prevented that a large amount of heat will accumulate in one place. In addition, the heat discharged from the power supply units 17 does not accumulate inside the enclosure 12, and the possibility of malfunctions such as damage to the power supply circuit 31 due to heat is minimized.

[0030] In this embodiment, the fan 25 is configured as an exhaust fan, but it may also be configured as an intake fan. In that case, an air filter section 23 is provided directly below the fan 25. In that case, for example, the intake port 28 of the door section 12A becomes the exhaust port.

[0031] Furthermore, if the power supply circuit 31 or the drive circuit 33 fails, the worker can remove the driver unit 26 from the main duct 13 through the opening 27 while the door section 12A is open. This allows the worker to perform tasks such as replacing the power supply circuit 31 or the drive circuit 33 with the driver unit 26 outside the housing 12. Therefore, these replacement tasks can be performed efficiently in a spacious workspace.

[0032] In this embodiment, two driver units 26 (subducts 15) are connected to the two openings 14A of the connection section 14, but this is not the only example. For example, if the power supply unit 17 consists of one unit, one driver unit 26 may be attached to one opening 14A, as shown in the first modified example in Figure 6. In this case, a flat-plate-shaped blocking member 34 can be attached to the main duct 13 at the location of the other opening 14A where one or more subducts 15 are not connected. This flat-plate-shaped blocking member 34 closes the other opening 14A. This prevents air heated by the power supply unit 17 from flowing back into the housing 12 through the other opening 14A. Here, "locations where one or more subducts 15 are not connected" refers to locations away from where the subducts 15 are connected, where a member that obstructs the flow of fluid between the main duct and the inside of the housing (in this example, the blocking member 34) is placed.

[0033] Furthermore, the number of power supply units 17 is not limited to the above and can be increased as appropriate. Figure 7 shows a second modified example in which the number of power supply units 17 is increased according to the number of LEDs in the UV irradiator 32. In this modified example, three driver units 26 are connected to the upper opening 14A of the connection part 14, and three driver units 26 are connected to the lower opening 14A. As shown in Figure 8, each of the subducts 15 of the driver unit 26 is formed to be thinner in the width direction W than in the above embodiment. In this modified example as well, since the power supply units 17 are separated from each other by the subducts 15, even when the power supply units 17 are arranged at high density, it is prevented that a lot of heat will accumulate in one place.

[0034] As shown in Figure 9, in a third modification, the intake port 28 may be provided at the bottom of the housing 12. In this modification, the air filter unit 23 is detachably attached to the bottom of the housing 12. In this modification as well, the fan 25 is constantly rotating, and the air in the main duct 13 is discharged to the outside of the housing 12. Therefore, the air taken into the housing 12 through the intake port 28 at the bottom of the housing 12 passes through the air filter unit 23 to remove dust and other debris, and is then taken into the sub-duct 15 from the air inlet 15A of the sub-duct 15 and passes around the power supply circuit 31 and the drive circuit 33. At that time, the air passing around the power supply circuit 31 and the drive circuit 33 absorbs heat from the power supply circuit 31 and the drive circuit 33 and moves into the main duct 13 via the air outlet 15B of the sub-duct 15 and the connection part 14 of the main duct 13. The air in the main duct 13 is discharged to the outside of the housing 12 by the fan 25. As shown in this modified example, even when the positions of the air intake ports 28 are different, the power supply units 17 are separated by the subduct 15, so even when the power supply units 17 are arranged at high density, it is prevented that a large amount of heat will accumulate in one place.

[0035] According to this embodiment, the following can be said. The power supply unit 11 has a housing 12, a connection part 14 provided at one end, and a ventilation part 24 provided at the other end opposite to the one end and connected to the outside of the housing 12, and comprises a main duct 13 provided inside the housing 12, one or more cylindrical sub-ducts 15 that are detachable from the connection part 14, and one or more power supply units 17 provided in a one-to-one ratio for one or more sub-ducts 15, with one or more power supply units 17 housed inside each of the one or more sub-ducts 15.

[0036] This configuration allows for one power supply unit 17 to be placed in each subduct 15. As a result, even when the power supply units 17 are arranged at high density, they are separated from each other by the subducts 15, preventing heat from accumulating around them. This allows for efficient cooling of the power supply units 17 even when they are arranged at high density. This minimizes the possibility of the power supply units 17 failing due to heat, thereby improving the reliability of the power supply unit 11.

[0037] In this case, the connection part 14 has one or more openings 14A to which one or more subducts 15 can be connected, and a closing member 34 that can be attached to the main duct to close one or more openings 14A at locations where one or more subducts 15 are not connected.

[0038] This configuration prevents the high-temperature air discharged from the sub-duct 15 into the main duct 13 from flowing back into the housing 12 through one or more openings 14A where the sub-duct 15 is not connected. This ensures that the proper discharge of high-temperature air is not hindered, preventing the problem of the temperature inside the housing 12 rising.

[0039] In this case, the housing 12 includes an opening 27 provided on the extension line A in the direction of attachment and detachment of the subduct 15 attached to the connection part 14, the opening 27 from which the subduct 15 can be taken out of the housing 12 or stored inside the housing 12, and a door part 12A that can close the opening 27 or open the opening 27.

[0040] This configuration makes it easy to attach and detach the subduct 15 through the opening 27.

[0041] In this case, the housing 12 has an air intake port 28 for taking in outside air and an air filter section 23 provided adjacent to the air intake port 28. This configuration prevents dust and other particles from entering the housing 12.

[0042] Next, a modified embodiment of the power supply device 11 of this embodiment will be described. In the following embodiment, the parts that differ mainly from the first embodiment described above will be described, and the parts that are common to the first embodiment will not be described. [Second Embodiment]

[0043] The power supply unit 11 of the second embodiment will be described with reference to Figures 10 and 11. In this embodiment, the fan 25 is attached to the subduct 15, which is different from the first embodiment, but other parts are the same as in the first embodiment.

[0044] Fan 25 is an intake fan and is attached to an air inlet 15A provided at the end (front end) of the subduct 15 (driver unit 26). In this embodiment, a pair of fans 25 are provided for each subduct 15, but only one fan 25 may be provided for each subduct 15. Fan 25 may be directly attached to the power supply unit 17. In this embodiment, the fan 25 provided adjacent to the ventilation section 24 of the main duct 13 is omitted. Adjacent to the ventilation section 24, there is an exhaust port 41 and a plurality of fins 42 provided to finely partition the exhaust port 41.

[0045] Next, with reference to Figure 10, the heat dissipation function of the power supply unit 17 in the power supply device 11 of this embodiment will be explained. When UV irradiation is performed in the UV irradiator 32 for a certain period of time, the power supply unit 17 becomes hot and releases heat into the surroundings. On the other hand, when the UV irradiator 32 and the power supply device 11 are running, the fan 25 is constantly rotating, and air is drawn into the sub-duct 15. Therefore, the air drawn into the housing 12 through the intake port 28 of the door section 12A passes through the air filter section 23 to remove dust and other debris, and is then drawn into the sub-duct 15 from the air inlet 15A of the sub-duct 15 and passes around the power supply circuit 31 and the drive circuit 33. At that time, the air passing around the power supply circuit 31 and the drive circuit 33 absorbs heat from the power supply circuit 31 and the drive circuit 33 and moves into the main duct 13 via the air outlet 15B of the sub-duct 15 and the connection part 14 of the main duct 13. The air inside the main duct 13 rises along the flow path of the main duct 13 and is released to the outside of the housing 12. In this way, even in this embodiment, the power supply units 17 are separated from each other by the sub-ducts 15, so even if the power supply units 17 are arranged at high density, it is prevented that a large amount of heat will accumulate in one place. In addition, the heat released from the power supply units 17 does not accumulate inside the housing 12, so that malfunctions such as damage to the power supply circuit 31 due to heat do not occur.

[0046] The fan 25 may also be an exhaust fan. In this case, the airflow within the housing 12 will be reversed from the above, and outside air can be drawn into the main duct 13 and supplied to the driver unit 26 (sub-duct 15). The air that has cooled the driver unit 26 is discharged outside the housing 12 via the fan 25 and the intake port 28.

[0047] According to this embodiment, the following can be said: Each of the one or more subducts 15 includes an air outlet 15B connected to one or more openings 14A, an air inlet 15A provided at the end opposite to the air outlet 15B, and an intake fan 25 capable of sending air from the air inlet 15A toward the air outlet 15B.

[0048] With this configuration, the intake fan 25 can actively send cooling air into the subduct 15. This further improves the cooling efficiency of the power supply unit 17. [Third Embodiment]

[0049] Referring to Figure 12, the power supply unit 11 of the third embodiment will be described. This embodiment differs from the first embodiment in that a first passage 51 and a second passage 52 for cooling the control circuit 16 are provided in the middle of the main duct 13, but other parts are common with the first embodiment.

[0050] In other words, in this embodiment, a first passage 51 is provided in the main duct 13 at a location upstream of the control circuit 16. Similarly, a second passage 52 is provided in the main duct 13 at a location downstream of the control circuit 16. By thus drawing a portion of the airflow through the main duct 13 to the control circuit 16 side via the first passage 51 (through-hole) and the second passage 52 (through-hole), the control circuit 16 can also be cooled in the same way as the power supply unit 17.

[0051] In this embodiment, a first passage 51 is provided in the main duct 13, but the location of the air intake for cooling the control circuit 16 is not limited to this. For example, as shown by the dashed line in Figure 12, a third passage 53 (through hole) may be provided in a part of the sub-duct 15 (for example, the top surface), and air may be drawn into the control circuit 16 side through this third passage 53.

[0052] Figure 13 shows a fourth modification of this embodiment. In this modification, instead of forming an air intake for cooling the control circuit 16 in the main duct 13, outside air is taken in directly from a part 28A of the air intake 28 (air filter part 23) of the door part 12A. The outside air taken in on the control circuit 16 side in this way is discharged outside the housing 12 via the second passage 52 (through hole) and the main duct 13.

[0053] According to this embodiment and its modifications, the following can be said: The power supply unit 11 comprises a control circuit 16 housed in the housing 12, and a plurality of passages provided in the main duct 13 at a position between the connection part 14 and the ventilation part 24, which send air from the main duct 13 to the control circuit 16 and collect the air sent to the control circuit 16.

[0054] With this configuration, not only the power supply unit 17 but also the control circuit 16 can be cooled.

[0055] The power supply unit 11 includes a control circuit 16 housed within the housing 12, a passage provided midway through the subduct 15 to send air from the subduct 15 to the control circuit 16, and a passage provided in the main duct 13 between the connection part 14 and the ventilation part 24 to recover the air sent to the control circuit 16.

[0056] With this configuration, not only the power supply unit 17 but also the control circuit 16 can be cooled.

[0057] The embodiments described above can be implemented with various further substitutions and modifications. Naturally, it is also possible to combine the different embodiments described above as appropriate to constitute a single invention. [Explanation of Symbols]

[0058] 11 Power supply 12 cabinets 12A Door section 13 Main duct 14 Connection part 14A aperture 15 Subduct 15A Air Inlet 15B Air outlet 17 Power supply unit 24 Ventilation section 25 Fans 27 Opening A extension line 34 Closure member

Claims

1. The casing and A main duct is provided inside the housing, having a connecting portion at one end and a ventilation portion at the other end opposite to the first end and connected to the outside of the housing. One or more cylindrical sub-ducts that are detachable from the aforementioned connection part, One or more power supply units are provided in a one-to-one ratio for the one or more subducts, and each of the one or more power supply units is housed inside the one or more subducts. A power supply unit equipped with the following features.

2. The aforementioned connection part is One or more openings to which the aforementioned one or more subducts can be connected, A closing member that can be attached to the main duct to close the one or more openings at locations where the one or more subducts are not connected, A power supply device according to claim 1, having the following features.

3. Each of the one or more subducts is, An air outlet connected to the one or more openings, An air inlet is provided at the end opposite to the aforementioned air outlet, A fan capable of sending air from the air inlet toward the air outlet, The power supply device according to claim 2, comprising:

4. The aforementioned enclosure is An opening provided on the extension line of the direction of attachment and detachment of the subduct from the connection portion, the opening being able to remove the subduct from inside the housing or house the subduct inside the housing, A door section that can close the opening or open the opening, A power supply device according to any one of claims 1 to 3, comprising:

5. The power supply device according to claim 1, wherein the housing has an air intake port for taking in outside air and an air filter section provided adjacent to the air intake port.

6. The power supply device according to claim 5, wherein the housing has an air filter section near the exhaust port on the opposite side of the intake port.

7. The power supply device according to claim 6, wherein the pressure loss of the air filter section provided adjacent to the exhaust port is smaller than the pressure loss of the air filter section provided adjacent to the intake port.

8. The control circuit housed within the aforementioned enclosure, A plurality of passages provided in the main duct at a position between the connection portion and the ventilation portion, which send air from the main duct to the control circuit and recover the air sent to the control circuit, The power supply device according to claim 1, comprising:

9. The control circuit housed within the aforementioned enclosure, A passage provided in the middle of the subduct for sending air from the subduct to the control circuit, A passage is provided in the main duct at a position between the connection part and the ventilation part to recover the air sent to the control circuit, The power supply device according to claim 1, comprising:

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