JP2024007940A - Power source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power source device to which outside air is introduced to encourage a heat generation component to generate heat while waterproof properties and dustproof properties are ensured.

SOLUTION: A power source device includes: a casing 10 having a first wall and a second wall 12 that face each other; a side surface wall (third wall); a side surface wall 14 facing the third wall; a top wall 15; an introduction duct 16 provided in the first wall and opening downward; an exhaust duct 17 provided in the second wall 12 so as to be at a height position higher than the introduction duct 16 and opening downward; an air blower 30 provided on the second wall 12 or the exhaust duct 17 and exhausting air in the casing 10 via the exhaust duct 17; and a power converter 50 disposed in the middle of a flow path from the introduction duct 16 to the air blower 30.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2024,JPO&INPIT

Description

One aspect of the present invention relates to a power supply device.

Patent Document 1 discloses a power supply cabinet installed outdoors.

Patent No. 6562146

A mobile phone base station uses a DC power supply device that supplies DC power rectified from AC input power to a radio device as a load. In the fifth generation mobile communication system (so-called "5G"), many base stations are expected to be installed.

In a power supply device installed outdoors, from the viewpoint of waterproofness and dustproofness, it is preferable to seal the internal power converter and storage battery with a housing. However, since the power converter and wiring components generate heat within the housing, it is necessary to dissipate the heat to the outside.

By installing a heat exchanger in the casing, a certain degree of heat dissipation effect can be expected while maintaining airtightness. However, heat exchangers may not be sufficiently cost effective.

One aspect of the present invention provides a power supply device that introduces outside air and promotes heat dissipation from heat generating components while ensuring waterproofness and dustproofness.

A power supply device according to one aspect of the present invention includes a housing having a first wall and a second wall facing each other, an introduction duct provided in the first wall and opening downward, and a position at a higher height than the introduction duct. a discharge duct provided on the second wall and opening downward; a blower provided on the second wall or the discharge duct for discharging air within the housing through the discharge duct; and a power converter disposed in the middle of the flow path to the blower.

According to the above aspect, it is possible to provide a power supply device that introduces outside air and promotes heat dissipation from heat generating components while ensuring waterproofness and dustproofness.

FIG. 3 is a front perspective view showing the DC power supply device. FIG. 3 is a perspective view showing the internal structure of the DC power supply device. FIG. 3 is a perspective view showing a blower and a discharge duct of the DC power supply device. FIG. 2 is a perspective view showing a board unit having a circuit breaker and wiring components. FIG. 3 is a side view showing a flow path from an inlet duct to an outlet duct.

Hereinafter, an outline of a power supply device according to an embodiment of the present invention will be explained.

(1) The power supply device includes a casing having a first wall and a second wall facing each other, an introduction duct provided in the first wall and opening downward, and a second wall located at a height higher than the introduction duct. a discharge duct provided on a wall and opening downward; a blower provided on the second wall or the discharge duct for discharging air within the housing through the discharge duct; and a blower discharging air from the introduction duct to the blower. A power converter disposed in the middle of the flow path.

According to the above configuration, since the introduction duct and the discharge duct are each opened downward, it is possible to ensure waterproofness and dustproofness of the power supply device. A blower and a discharge duct are provided at a higher height than the introduction duct, and a power converter is placed in the middle of the flow path from the introduction duct to the blower. Therefore, the blower can introduce and flow outside air to promote heat dissipation from the heat-generating components without going against the rising airflow that occurs due to the heat generation of the power converter and components such as wiring components connected thereto.

(2) In the power supply device according to (1) above, a power storage element may be disposed below the power converter in the housing.

According to the above configuration, it is possible to suppress the progress of deterioration of the power storage element due to the power storage element being warmed by the heat of the power converter and the wiring components connected thereto. In addition, power storage elements such as storage batteries in DC power supplies and uninterruptible power supplies are float-charged during normal times (for example, during non-power outages) and do not generate much heat, so the power storage elements are placed on the upstream side of the flow path. However, the introduced air is not heated that much by the energy storage element. Therefore, the introduced air can promote heat dissipation from heat generating components such as wiring components after passing around the electricity storage element.

(3) The power supply device according to (1) or (2) above may include a component cooling section that forms part of the flow path on a side of the power converter within the housing.

According to the above configuration, even when the power consumption of the load connected to the power supply device is large, the introduced air is directed toward the component cooling section (concentrated in a narrow part of the flow path), and the It can promote heat dissipation from heat generating parts such as metal bars.

(4) In the power supply device according to any one of (1) to (3) above, the blower may be provided on the second wall or the discharge duct so as to face upward.

The blower may be provided so as to face obliquely upward, but is not limited to this form. According to the above configuration, heat dissipation from the heat generating components can be promoted to every corner of the housing, and air can be smoothly blown from the blower to the discharge duct opening downward.

(5) In the power supply device according to any one of (1) to (4) above, the second wall may have a door that can be opened and closed, and the blower may be provided on the door.

According to the above configuration, the blower can be easily attached to the housing when manufacturing the power supply device, and maintenance after the start of operation can be easily performed. A blower made up of a fan or the like is a component that deteriorates relatively easily. By providing the blower on a door that can be opened and closed, the owner or maintenance personnel of the power supply device can easily access the blower.

(6) In the power supply device according to any one of (1) to (5) above, the blower may be provided on the second wall or the discharge duct over a length that is approximately the same as a width dimension of the second wall. good.

Here, "the length that is substantially the same as the width of the second wall" may be any length that is at least half the width of the second wall. In particular, it is preferable that the blower is provided on the second wall over a length that is at least 2/3 of the width of the second wall and not more than the width of the second wall.
According to the above configuration, it is possible to promote heat dissipation from the heat generating components to every corner of the power supply device, and to obtain a high cooling effect.

(7) In the power supply device according to any one of (1) to (6) above, the first wall is provided on the first wall over approximately the same length as the width dimension of the first wall, and It may have an introduction opening that communicates with the introduction duct.

According to the above configuration, it is possible to smoothly introduce outside air and promote heat dissipation from the heat generating components to every corner of the power supply device, thereby achieving a high cooling effect.

Hereinafter, embodiments will be described in detail with reference to the drawings. FIG. 1 is a front perspective view of a DC power supply device 100 for a mobile phone base station. The DC power supply device 100 has a casing 10 that can be installed outdoors. The housing 10 includes a front wall (first wall) 11, a rear wall (second wall) 12 opposite to the front wall 11, a side wall (third wall) 13, and a side wall 14 opposite to the side wall 13. (see FIG. 3) and a ceiling wall 15.

As shown in FIG. 1, the front wall 11 in this embodiment is a front door having a handle 20. As shown in FIG. An introduction duct 16 is provided at the lower part of the front wall 11.

The introduction duct 16 in this embodiment has a hood-like shape, projects forward from the front wall 11, and is open downward. The introduction duct 16 in this embodiment opens vertically downward to improve waterproofness and dustproofness, but alternatively, it may open diagonally downward as long as waterproofness and dustproofness can be ensured. good.

A discharge duct 17 is provided on the rear wall 12 at a higher height position than the introduction duct 16 on the front wall 11.
In this way, the introduction duct 16 and the discharge duct 17 are provided on the front wall 11 and the rear wall 12 that face each other. Therefore, outside air is smoothly introduced from the lower part of the front surface of the casing 10 by a blower (described later) provided on the back wall 12 or the exhaust duct 17.

The discharge duct 17 in this embodiment has a hood-like shape similar to the introduction duct 16, projects rearward from the rear wall 12, and is open downward. The discharge duct 17 in this embodiment opens vertically downward to improve waterproofness and dustproofness, but alternatively, the discharge duct 17 may open diagonally downward as long as waterproofness and dustproofness can be ensured. good.

FIG. 2 is a perspective view showing the internal structure of the DC power supply device with the front wall 11 and the back wall (back door) 12 open and the side wall 13 not shown. In FIG. 2 and FIG. 3 described later, illustration of a power storage element (a storage battery such as a lead acid battery or a lithium ion battery, a capacitor, or a flywheel) is omitted.

As shown in FIG. 2, an introduction opening 11a communicating with the introduction duct 16 is provided at the lower part of the front wall 11. The introduction opening 11a is provided in the front wall 11 over a length that is approximately the same as the width of the front wall 11, and communicates with the introduction duct 16. The lower end of the introduction duct 16 extends downward from the lower end of the introduction opening 11a.
In this embodiment, one introduction duct 16 is provided so as to straddle the three introduction openings 11a in order to improve assemblability. One inlet duct may be provided for each.

Four pillars 22a, 22b, 22c, and 22d are provided inside the casing 10, and heat-generating components such as a power converter 50 and wiring components are mounted above the pillars (above the center in the height direction). It is located. A housing portion 25 is provided below the power converter 50 for arranging a power storage element.

The power converter 50 in this embodiment includes a plurality of (for example, 6 to 7) flat rectifier units (including AC-DC converters and DC-DC converters) stacked and electrically connected in parallel. It is configured as follows. A component cooling section 26 is provided on the side of the power converter 50 (between the side surfaces of the plurality of rectifier units and the inner surface of the side wall 13 of the housing 10) for arranging a board unit, etc., which will be described later. ing.

After passing around a power storage element (not shown), the air introduced from the introduction duct 16 hits the lower surface of the power converter 50 or the lower surface of a plate-shaped member located below the power converter 50, and flows along the lower surface. To the side, that is, to the component cooling section 26. The introduced air is concentrated in the component cooling section 26, which is a narrow part of the flow path.

FIG. 3 is a perspective view of the back with the back wall (back door) 12 open. As mentioned above, the exhaust duct 17 is provided on the outer surface of the rear wall 12 so as to protrude rearward from the rear wall 12. A fan 30 is provided on the inner surface of the back wall 12 at a height corresponding to the exhaust duct 17. The fan 30 may be provided in the exhaust duct 17 and attached to the back wall 12 together with the exhaust duct 17. At least a portion of the fan 30 in this embodiment is housed in the recess of the exhaust duct 17 so as not to protrude inward from the inner surface (vertical surface) of the rear wall 12 into the housing 10 .
Since the front wall 11 and the rear wall 12 are configured to be openable and closable, the power supply device is easy to assemble and maintain.

The fan 30 in this embodiment is configured by arranging a plurality (three) of exhaust fans horizontally on the back wall 12. A plurality of fans 30 are provided on the back wall 12 or the exhaust duct 17 over a length that is approximately the same as the width dimension of the back wall 12. Each fan 30 is provided such that its rotation axis or rotation center axis faces inward and upward of the housing 10 . Each fan 30 is provided diagonally with respect to the rear wall 12 so as to face the top of the power converter 50.
In this embodiment, one exhaust duct 17 is provided so as to straddle the three fans 30 in order to improve assembly efficiency. One introduction duct may be provided for each.
The lower end of the discharge duct 17 extends downward from the lower end of the fan 30 and is open.

A wiring guide plate 12b is provided below the back wall 12 and has an insertion hole 12a through which the wiring is inserted. The wiring guide plate 12b is fixed to the housing 10 without opening or closing together with the rear wall 12.

In the component cooling section 26 shown in FIG. 2, a board unit 40 as shown in FIG. 4 and other heat generating components (not shown) are arranged. The board unit 40 includes a board 41, a circuit breaker (switching element) 42 provided on the board 41, a heat dissipation component 43 that cools the circuit breaker 42, and a power line (power line) that is turned on and off by the circuit breaker 42. It has a metal bar 45 that constitutes. When the heat radiation performance of the circuit breaker 42 is sufficient, the heat radiation component 43 may not be provided. The metal bar 45 may be a copper bar, which is inexpensive and has excellent performance.

When the power consumption of the electrical load connected to the power supply device is large, a relatively large current (several hundred amperes) flows through the metal bar 45, causing the metal bar 45 to generate heat. A power supply device for a 5G mobile phone base station tends to have a load that consumes a large amount of power or a large number of loads connected thereto, and the metal bar 45 generates heat.

In this embodiment, the component elixir section 26 is provided only on one side of the power converter 50 (only on the right side in FIG. 1). Since the air introduced from the introduction duct 16 is concentrated in the component cooling section 26, which is a narrow part of the flow path, the board unit 40 disposed there is efficiently cooled. Compared to the case where the heat-generating components are arranged dispersedly within the housing, by arranging the plurality of heat-generating metal bars 45 in a concentrated manner in the component cooling section 26 as in this embodiment, there is no restriction caused by the fan 30 or the like. Efficient heat dissipation is possible with the improved heat dissipation capacity.

FIG. 5 is a side view showing the air flow path from the introduction duct 16 to the discharge duct 17. By driving the fan 30 shown in FIG. 3, outside air is introduced into the housing 10 through the introduction duct 16 and the introduction opening 11a (see FIG. 2).

As shown in FIG. 5, the introduced air passes around a power storage element (not shown) and then hits the lower surface of the power converter 50 (see FIG. 2) or other plate-shaped member, cooling the parts along the lower surface. Head to section 26. In this way, the introduced air is concentrated in the component cooling section 26, which is a narrow part of the flow path.

The introduced air flows upward through the component cooling section 26 to promote heat radiation from the heat generating components disposed there, and then flows toward the rear wall 12 (toward the fan 30 shown in FIG. 3). It is discharged downward via the discharge duct 17. Since the exhaust fan 30 is provided obliquely to the back wall 12 so as to face the top of the housing 10 (to suck air from the top of the housing 10), Air is sucked diagonally downward.

According to the DC power supply device 100 described above, the introduction duct 16 and the discharge duct 17 extend and open below the lower end of the introduction opening 11a and below the lower end of the fan 30, respectively. Therefore, the DC power supply device 100 can ensure waterproofness and dustproofness, and is suitable for outdoor installation.

Further, a fan 30 and a discharge duct 17 are provided at a higher height than the introduction duct 16, and a power converter 50 is arranged in the middle of the flow path from the introduction duct 16 to the fan 30. Therefore, the fan 30 can introduce and flow outside air to promote heat dissipation from the heat-generating components without going against the rising airflow that occurs due to the heat generation of the power converter 50 and components such as wiring components connected thereto.

In the DC power supply device 100, the power storage element is disposed below the power converter 50 in the housing 10, so that the power storage element is heated by the heat of the power converter 50 and the wiring components connected to it. Progress of deterioration can be suppressed. A power storage element such as a storage battery in a backup power source such as the DC power supply device 100 or an uninterruptible power supply device is float-charged during normal times and does not generate much heat. Even if the electricity storage element is arranged on the upstream side of the flow path, the introduced air is not heated by the electricity storage element very much. Therefore, the introduced air can promote heat dissipation from heat generating components such as wiring components after passing around the electricity storage element.

The DC power supply device 100 includes a component cooling section 26 that forms part of the flow path on the side of the power converter 50 within the housing 10 . Therefore, even if the power consumption of the load connected to the power supply device 100 is large, the introduced air is directed toward the component cooling section (concentrated in the narrow part of the flow path), and the metal bar placed there can promote heat dissipation from heat-generating parts.

The DC power supply device 100 is provided on the rear wall 12 or the exhaust duct 17 so that the fan 30 (the suction surface) faces obliquely upward. Therefore, heat dissipation from the heat-generating components can be promoted to every corner of the housing 10, and air can be smoothly blown from the fan 30 to the discharge duct 17 that opens downward.

The rear wall 12 of the DC power supply device 100 has a door that can be opened and closed, and the fan 30 is installed on the door. Therefore, the fan 30 can be easily attached to the housing 10 during the manufacture of the power supply device 100, and the operation Maintenance after starting is also easy. The fan 30 is a component that deteriorates relatively easily. By providing the fan 30 on a door that can be opened and closed, the owner and maintenance personnel of the power supply device 100 can easily access the blower.

Since the fan 30 of the DC power supply 100 is provided on the rear wall 12 or the exhaust duct 17 over a length (horizontal length) that is approximately the same as the width of the rear wall, the fan 30 is installed in the rear wall 12 or the exhaust duct 17 over a length (horizontal length) that is approximately the same as the width of the rear wall. It promotes heat dissipation and provides a high cooling effect.

The front wall 12 of the DC power supply device 100 has an introduction opening 11 a that is provided in the front wall 12 over a length (horizontal direction length) that is approximately the same as the width dimension of the front wall 12 and communicates with the introduction duct 16 . With this configuration, outside air can be introduced smoothly to promote heat dissipation from the heat generating components to every corner of the power supply device 100, and a high cooling effect can be obtained.

The invention is not limited to the embodiments described above.
In the embodiment, a DC power supply device for a mobile phone base station has been described, but the present invention can also be applied to a DC power supply device for other uses and a power supply device such as an uninterruptible power supply (UPS). In particular, it is preferable to apply the present invention to applications where a large number of power supply devices are installed at various locations outdoors.

The power supply device may be installed indoors. The housing 10 is not limited to a rectangular parallelepiped shape as in the embodiment. The first wall and the second wall are not limited to the front wall 11 and the back wall 12, and may be any pair of opposing walls. Opposing as used herein does not necessarily have to be completely parallel.

The power converter included in the power supply device may have at least one of AC-DC, DC-DC, and DC-AC power conversion functions.

In the embodiment, the fan 30 is used as the blower, but the form is not limited to this, and other blowers may be used. The blower may have a function of cooling the air within the housing 10 (heat exchange function).

10 Housing 11 Front wall (first wall)
12 Back wall (second wall)
13,14 Side wall (third wall)
16 Introductory duct 17 Discharge duct 26 Component cooling section 30 Fan (blower)
50 Power converter 100 DC power supply device (power supply device)

Claims (7)

a casing having a first wall and a second wall facing each other;
an introduction duct provided in the first wall and opening downward;
a discharge duct that is provided on the second wall at a higher height than the introduction duct and opens downward;
a blower that is installed on the second wall or the exhaust duct and discharges the air inside the housing through the exhaust duct;
A power supply device comprising: a power converter disposed in the middle of a flow path from the introduction duct to the blower. The power supply device according to claim 1, wherein a power storage element is arranged below the power converter in the housing. The power supply device according to claim 1 or 2, further comprising a component cooling section that forms a part of the flow path on a side of the power converter in the housing. The power supply device according to claim 1 or 2, wherein the blower is provided on the second wall or the discharge duct so as to face upward. The power supply device according to claim 1 or 2, wherein the second wall has a door that can be opened and closed, and the blower is provided on the door. The power supply device according to claim 1 or 2, wherein the blower is provided on the second wall or the discharge duct over a length that is approximately the same as a width dimension of the second wall. The power source according to claim 1 or 2, wherein the first wall has an introduction opening that is provided in the first wall over a length that is approximately the same as a width dimension of the first wall and that communicates with the introduction duct. Device.

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