JP2024016598A - Charging device for electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charging device for an electric vehicle that can improve the thermal arrangement environment of a charging unit on the upper side.

SOLUTION: A charging device 1 for an electric vehicle includes a chassis 2 that houses a plurality of charging units 30 inside. The plurality of charging units 30 includes a first air intake P1 provided at a lower portion of the chassis and housed in the chassis in a vertically aligned state, a second air intake P2 provided in the upper part of the chassis, a first exhaust port Q1 in the upper part of the chassis, a first flow path that allows air introduced into the chassis from the first air intake P1 to pass through the sides of the charging units 30 in the direction from the lowermost stage charging unit 30 to the uppermost stage charging unit 30 and to be discharged from the first exhaust port Q1 to the outside of the chassis, and a second flow path that allows air introduced into the chassis from the second intake port P2 to pass through the side of the charging units 30 on the upper stage and to be discharged from the first exhaust port Q1 to the outside of the chassis.

SELECTED DRAWING: Figure 7

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a charging device for an electric vehicle.

Patent Document 1 discloses a quick charger for charging the battery of an electric vehicle. This quick charger consists of a housing, multiple shelf boards that vertically divide the interior of the housing, a cylindrical duct that extends vertically inside the housing so as to penetrate the shelves, and a duct that extends vertically inside the housing. Equipped with a fixed charging unit. The charging unit includes a plurality of electrical devices that generate heat during operation, and these electrical devices are fixed to a base plate that also serves as a side surface of the duct. An intake port is provided at the bottom of the casing to take in outside air, and the air taken in through the intake port passes through a duct and is exhausted from an exhaust port provided at the top of the casing. It becomes.

Japanese Patent Application Publication No. 2013-85398

By the way, as in the technology described in Patent Document 1, a plurality of charging units are housed in a vertically lined state within a housing, and cooling air for cooling the charging units is supplied from the bottom to the top inside the housing. When the air is flowed toward the top of the case, the warm air generated by each charging unit flows upwards inside the case, and the temperature rises as the cooling air also flows toward the top of the case. is located in a more thermally harsh environment. Therefore, it is a challenge to improve the thermal arrangement environment of the charging unit on the upper stage side.

The present invention has been made to solve the above-mentioned problems, and includes a charging device for an electric vehicle that includes a plurality of charging units arranged vertically inside a housing. The purpose is to improve the deployment environment.

An electric vehicle charging device according to a first aspect of the present invention includes a housing that houses therein a plurality of charging units that convert electric power input from an external power source into electric power for charging an electric vehicle. In the vehicle charging device, the plurality of charging units are housed in a vertically lined state in the housing, and a first intake port provided at a lower part of the housing and a first intake port provided at a lower part of the housing A second intake port provided at the top, a first exhaust port provided at the top of the housing, and air introduced into the interior of the housing from the first intake port are transferred to the charging unit at the lowest stage. a first flow path that passes through the sides of the charging unit in the direction from the topmost charging unit and discharges the air from the first exhaust port to the outside of the housing; A second flow path is provided that allows the air introduced inside to pass through the side of the charging unit on the upper stage side and is discharged from the first exhaust port to the outside of the casing.

In the electric vehicle charging device according to the present invention, a plurality of charging units are housed in a vertically lined state inside the casing. This casing has a first intake port provided at the bottom of the casing, and a second intake port and a first exhaust port provided at the top of the casing. Inside the casing, air introduced into the casing from the first intake port is passed through the side of the charging unit in the direction from the bottom charging unit to the top charging unit, and then is passed through the side of the charging unit from the bottom charging unit to the top charging unit. A first flow path is formed for discharging the water to the outside. This first flow path generates an airflow inside the casing that rises from the first intake port provided at the bottom toward the first exhaust port provided at the top. It can cool multiple charging units. In addition, inside the housing, there is a second air intake port that allows the air introduced into the housing from the second intake port to pass through the side of the charging unit on the upper stage, and then to be discharged to the outside of the housing from the first exhaust port. Two channels are formed. Due to this second flow path, an air current is generated inside the casing from the second intake port toward the first exhaust port, which mainly discharges the air in the upper space of the casing to the outside. The upper charging unit can be cooled by the airflow. In this way, the flow of air in the upper space within the housing can be promoted, the thermal arrangement environment of the charging unit on the upper stage side can be improved, and the heat inside the housing can be efficiently dissipated.

FIG. 1 is a partially exploded front perspective view of the electric vehicle charging device according to the embodiment. FIG. 1 is a partially exploded rear perspective view of the electric vehicle charging device according to the embodiment. FIG. 2 is a side view of the electric vehicle charging device according to the embodiment as viewed from the left side, and the side panel of the second space is omitted. FIG. 2 is an enlarged side view schematically showing a part of a cross section taken along line IV-IV in FIG. 1. FIG. FIG. 3 is an exploded perspective view of the charging unit. FIG. 3 is a schematic diagram for explaining a first flow path inside the casing. FIG. 3 is a schematic diagram for explaining a second flow path inside the casing. It is a schematic diagram for demonstrating the third flow path inside a housing|casing. FIG. 7 is a schematic diagram for explaining a fourth flow path inside the casing. FIG. 1 is a block diagram of an electric vehicle charging device according to an embodiment.

Hereinafter, an electric vehicle charging device 1 (hereinafter simply referred to as "charging device 1") according to an embodiment of the present invention will be described with reference to FIGS. 1 to 10. For convenience of explanation, the positions, orientations, etc. of the components will be explained by defining the front, rear, left, right, top, and bottom directions as appropriate in each figure as the front, rear, left, right, top, and bottom directions of the charging device 1. Further, in each figure, some symbols may be omitted to make the drawings easier to read.

FIG. 1 shows a perspective view of the front side (front side) of a charging device 1 according to the present embodiment. This charging device 1 is a device for charging an electric vehicle such as an electric vehicle or a plug-in hybrid vehicle. This charging device 1 is a charger that is installed, for example, in a private facility or a public facility along a public road, and used by a user. This charging device 1 is, for example, a two-vehicle charging type that can charge two electric vehicles at the same time. As a charging method of this charging device 1, a quick charging method is adopted. Note that when this charging device 1 is installed, for example, in a parking lot of an apartment complex, it may be configured to adopt a normal charging method. Moreover, the above-mentioned electric vehicle is not limited to a car, but may be a motorcycle.

This charging device 1 includes a housing 2 that houses therein a plurality of charging units 30 that convert power input from an AC power source 200 (see FIG. 10), which is an external power source, into power for charging an electric vehicle. We are prepared. The housing 2 has a substantially rectangular box shape. The interior of the housing 2 is partitioned into two spaces by a partition wall 29, forming two spaces S1 and S2. In the two spaces S1 and S2, electrical equipment necessary for charging the electric vehicle is housed separately for each predetermined function.

The front panel section 20 that constitutes the front wall of the housing 2 includes a display panel H1 (touch panel) that displays the usage status of the charging device 1, operation buttons, etc., an illustration display section H2 that shows the operating procedure of the charging device 1, A card reader H3 and the like for authentication is provided. Furthermore, box-shaped holders 7 for holding the charging connectors 5 are attached to the front sides of both left and right side surfaces of the housing 2, respectively. One end of a charging cable 6 is connected to the left and right charging connectors 5, and the other end of the charging cable 6 is connected to the upper part of the side panel section 24 forming the left and right walls of the housing 2, respectively. There is.

Here, the main configuration of the charging device 1 will be explained with reference to the block diagram of FIG. 10. The charging device 1 is, for example, a charger that charges an electric vehicle using a quick charging method, and converts AC power input from an AC power source 200 such as a commercial power source into high-output DC power. It has a converting section 3. The charging device 1 supplies high-output, DC power output from the power converter 3 to a battery (not shown) mounted on an electric vehicle via a charging cable 6 and a charging connector 5. Thereby, the charging device 1 has a configuration that can shorten the charging time compared to a normal charging method that performs charging with the same output as a commercial power source or the like.

The power converter 3 of this embodiment is composed of six charging units 30 connected in parallel. Each charging unit 30 has a rectifier circuit 30A, a booster circuit 30B, and a converter circuit 30C. The rectifier circuit 30A rectifies and outputs AC power supplied from the AC power supply 200. The booster circuit 30B boosts the power output from the rectifier circuit 30A and outputs the boosted power. Converter circuit 30C converts the power output from booster circuit 30B into charging voltage and controls it. In this way, each charging unit 30 converts the power input from the input side into DC power. Each charging unit 30 is arranged in the first space S1 in the housing 2 because circuit components such as semiconductor elements and coils that constitute the rectifier circuit 30A, booster circuit 30B, and converter circuit 30C generate heat during operation. , and are arranged separately from other electrical equipment arranged in the second space S2. The first space S1 is formed inside a first housing section 2A provided on the back side (rear side) of the housing 2.

The charging device 1 includes an output control section 8 that controls the power output from the six charging units 30 and a charging control section 9 that controls charging of the power output from the six charging units 30. These control units 8 and 9 have a control device including at least one processor (CPU), and are configured to be able to communicate with each other using a predetermined communication standard such as CAN communication.

In a broad sense, a control device that controls the power supplied (input) from the AC power source 200 is connected to the input side of the six charging units 30. As an example, a leakage shielding section 10A is provided between the AC power source 200 and the six charging units 30. The earth leakage shielding section 10A is constituted by a known earth leakage shield. The earth leakage shielding part 10A is normally in an ON state that opens the primary circuit, but has a function of turning OFF and closing the primary circuit when an overcurrent or leakage is detected in the primary circuit. . Further, a capacitor (not shown) for noise cutting is connected between the AC power supply 200 and the earth leakage shielding part 10A. Further, a filter device 10B configured with a choke coil and an LC circuit for removing noise is connected between the earth leakage shielding section 10A and the six charging units 30.

The input-side control device including the earth leakage shielding part 10A is disposed inside the housing 2 in a second space S2 provided adjacent to the front side with respect to the first space S1. The second space S2 is formed inside the second housing section 2B, which is disposed on one side in the front-rear direction (the front side in FIGS. 1, 10, etc.) with respect to the first housing section 2A. In the second space S2, a DB section 11 is arranged in addition to the leakage shielding section 10A, the capacitor, and the filter device 10B. Further, the output control section 8 and the relay section 12 are arranged in the second space S2.

The DB section 11 is connected between the charging unit 30, the charging cable 6, and the charging connector 5 on the output side (secondary side) of the six charging units 30, respectively. The DB unit 11 is configured with a backflow prevention circuit including a plurality of diodes, and has a function of preventing current from flowing back between the six charging units 30 and the battery of the electric vehicle.

The output control section 8 is connected to the output sides of the six charging units 30 and controls the power output from the charging units 30. For example, the output control section 8 supplies the power output from each charging unit 30 to the charging cable 6 and the charging connector 5 by controlling ON/OFF of the relay section 12 based on a signal from the charging control section 9. do. When the relay unit 12 is turned on, it relays the power supply from the corresponding charging unit 30. By being turned off, the relay section 12 blocks power supply from the corresponding charging unit 30. In this way, the power supplied to the left and right charging connectors 5 can be controlled by the control of the output control unit 8. These output control section 8 and relay section 12 constitute an output control device 13 that controls the electric power output from the six charging units 30 to the electric vehicle. Further, the output control section 8 monitors the internal temperature of the charging unit 30 and the operation of the intake fan based on signals from various sensors mounted on each charging unit 30.

Electric power output from the second space of the housing 2 is supplied to the left and right charging cables 6 and the charging connector 5 via the charging control unit 9. The charging control unit 9 is configured to be able to communicate with the electric vehicle using a predetermined communication means such as CAN communication. The charging control unit 9 receives a control signal from the electric vehicle via the charging connector 5 connected to the charging plug of the electric vehicle. The signals received from the electric vehicle include a charging current command value and a signal regarding the start or end of charging. The charging control unit 9 receives a signal transmitted from the electric vehicle, determines the power output from the charging device 1 based on the received signal, and controls the start and end of charging.

As explained above, the interior of the housing 2 is divided into two spaces S1 and S2 to house electrical equipment necessary for charging. A plurality of charging units 30 forming the power converter 3 are arranged in the space S1. In the charging device 1, a plurality of channels for air cooling are provided inside the housing 2 in order to efficiently radiate heat generated in the charging unit 30 during operation. The structures of the housing 2 and the charging unit 30 will be described in detail below.

(Case)
As shown in FIGS. 1 and 2, the casing 2 includes a front panel part 20 that forms the front wall of the casing 2, a back panel part 22 that forms the rear wall of the casing 2, and a rear panel part 22 that forms the rear wall of the casing 2. It has side panel portions 24 that constitute left and right wall portions. These panel sections 20, 22, and 24 are erected on a pedestal section 26 that constitutes the bottom wall of the housing 2, and are, for example, a skeleton (not shown) in the form of a frame that includes the pedestal section 26. It is fixed to the part with screws. Further, the upper end opening of the casing 2 formed by the front panel section 20, the back panel section 22, and the left and right side panel sections 24 is closed by a ceiling panel section 28. In this way, the housing 2 has a substantially rectangular box shape.

The internal space of the casing 2 is divided into front and rear sections by a partition wall 29. Thereby, in the case 2, the rear side with respect to the partition wall part 29 constitutes a first case part 2A, and the front side with respect to the partition wall part 29 constitutes a second case part 2B.

The front panel section 20 is provided with a display panel H1 and a card reader H3. The front panel portion 20 is, for example, a design panel formed from a sheet metal material through NC processing or bender processing.

On the lower side of the front panel section 20, a pedestal section 26 formed in a rectangular frame shape is arranged. The front side of the pedestal section 26 is formed, for example, in a lattice shape with a plurality of openings, and constitutes a first intake port P1 provided at the lower part of the casing 2. The first intake port P1 introduces air from outside the casing 2 into the inside of the pedestal section 26, and introduces the introduced air from the lower side of the casing 2 into the internal space S1 of the first casing section 2A. .

As shown in FIG. 2, the back panel portion 22 is a design panel formed from, for example, a sheet metal material through NC processing or bender processing. A plurality of panel openings 42 are formed in this back panel portion 22 to communicate the inside and outside of the first housing portion 2A. The plurality of panel openings 42 are arranged in a straight line along the up-down direction on the left side and right side of the back panel section 22, respectively. The plurality of panel openings 42 are covered with a plurality of lattice panels 44 formed in the shape of long plates. Each lattice panel 44 has a lattice shape with a plurality of slit-shaped openings formed therethrough.

Specifically, on the left side of the back panel section 22, the plurality of panel openings 42 formed at the top of the back panel section 22 are covered by the first lattice panel 44A, and the plurality of panel openings 42 formed at the bottom of the back panel section 22 are covered by the first lattice panel 44A. A plurality of panel openings 42 are covered by a second lattice panel 44B.

Here, in the case 2, the inner surface of the second lattice panel 44B is covered with a sheet metal or the like. Therefore, among the plurality of panel openings 42, the portion covered by the second lattice panel 44B is configured not to communicate with the inside and outside of the first housing portion 2A. On the other hand, a portion of the plurality of panel openings 42 covered by the first lattice panel 44A is configured to communicate with the inside and outside of the first housing portion 2A. In this way, the second air intake port P2 for introducing external air to the left side of the back panel portion 22 is formed in the upper part of the housing 2.

On the right side of the back panel section 22, a plurality of panel openings 42 formed at the top of the back panel section 22 are covered by a third lattice panel 44C, and a plurality of panel openings 42 formed at the bottom of the back panel section 22 are covered by a third lattice panel 44C. Panel opening 42 is covered by fourth grid panel 44D.

Here, in the case 2, the inner surface of the third lattice panel 44C is covered with a sheet metal or the like. Therefore, among the plurality of panel openings 42, the portion covered by the third lattice panel 44C is configured not to communicate with the inside and outside of the first housing portion 2A. On the other hand, a portion of the plurality of panel openings 42 covered by the fourth lattice panel 44D is configured to communicate with the inside and outside of the first housing portion 2A. In this way, the third intake port P3 for introducing external air to the right side of the back panel portion 22 is formed in the lower part of the housing 2.

As shown in FIGS. 1 and 2, the side panel section 24 of the housing 2 includes a rear side panel section 241 disposed at the rear in the front-rear direction and a front side panel section 242 arranged at the front section in the front-rear direction. have. The rear side panel section 241 constitutes the left and right side surfaces of the first housing section 2A. The front side panel section 242 constitutes the left and right side surfaces of the second housing section 2B. That is, in the case 2, the rear panel section 22, the left and right rear side panel sections 241, the partition wall section 29, the pedestal section 26, and the rear part of the ceiling panel section 28 constitute the first case section 2A, and the inside thereof A first space S1 is formed in the first space S1. Further, in the case 2, the front panel section 20, the left and right front side panel sections 242, the partition wall section 29, the mount section 26, and the front part of the ceiling panel section 28 constitute a second case section 2B, and the inside thereof A second space S2 is formed in the second space S2.

As shown in FIG. 1, a plurality of fourth intake ports P4 arranged in the vertical direction are formed in the rear side panel portion 241 on the left side of the housing 2. The plurality of fourth intake ports P4 are constituted by, for example, a plurality of slit-shaped openings formed through the rear side panel portion 241. The plurality of fourth intake ports P4 are respectively provided corresponding to unit intake ports 36B, which will be described later, of the plurality of charging units 30 accommodated in the first space S1. As a result, in the housing 2, air is introduced into the interior of the housing 2 from the fourth intake port P4 provided on the left side, and air is introduced into the interior of each charging unit 30 from the unit intake port 36B of each charging unit 30. It is being introduced.

As shown in FIG. 2, a first exhaust port Q1 and a second exhaust port Q2 are formed in the rear side panel portion 241 on the right side of the housing 2. The first exhaust port Q1 is provided at the upper part of the rear side panel section 241. The first exhaust port Q1 is composed of, for example, a plurality of slit-shaped openings formed through the rear side panel portion 241. Note that in the first space S1 of the housing 22, an exhaust fan 46 is disposed corresponding to the first exhaust port Q1. The exhaust fan 46 is attached to the inside of the rear side panel portion 241 with screws. As a result, when the exhaust fan 46 operates, air in the upper space of the first space S1 is exhausted to the outside through the first exhaust port Q1.

A plurality of second exhaust ports Q2 arranged in the vertical direction are formed below the first exhaust port Q1. The plurality of second exhaust ports Q2 are constituted by, for example, a plurality of slit-shaped openings formed through the rear side panel portion 241. Each of the plurality of second exhaust ports Q2 is provided corresponding to a unit exhaust port 38A, which will be described later, of the plurality of charging units 30 accommodated in the first space S1. Thereby, the air discharged from the unit exhaust port 38A of each charging unit 30 is discharged to the outside of the housing 2 from the second exhaust port Q2 provided on the right side of the housing 2.

On the other hand, as shown in FIGS. 1 and 2, the second housing section 2B of the housing 2 includes a front panel section 20 that constitutes a part of the outer wall of the housing 2, and left and right front side panel sections 242. , and no opening is formed in the front portion of the ceiling panel portion 28 to allow communication between the inside and outside of the outer wall portion of the housing 2 . Therefore, the second housing part 2B has a sealed structure with excellent waterproof and dustproof performance to prevent rain, dust, etc. from entering the second space part S2, and is housed in the second housing part 2B. It is possible to protect electrical equipment such as control boards from rain and dust.

(charging unit)
FIG. 3 shows a state in which the rear side panel portion 241 is removed from the left side of the housing 2. Further, FIG. 4 schematically shows the storage state of the plurality of charging units 30 in the first space S1. As shown in these figures, a plurality of charging units 30 are arranged vertically in the first space S1 within the housing 2. Specifically, in this embodiment, six charging units 30 are housed in the first space S1. Each charging unit 30 is placed on six shelf boards 48 provided across the partition wall 29 and the back panel 22 in the first space S1. Each shelf board 48 is fixed to the partition wall 29 and the back panel 22 directly or via a bracket so as to provide a space between the partition wall 29 and the back panel 22.

As shown in FIGS. 4 and 6, a flow regulating member 50 made of an elastic material is attached to the lower surface of the upper shelf boards 48 except for the lowest shelf board 48. The flow regulating member 50 is formed in an elongated shape along the front end of the shelf board 48, and has a closed triangular cross section in the front-back and up-down directions. Specifically, the flow regulating member 50 includes a plate-shaped fixing part 52 fixed to the lower surface of the shelf, a plate-shaped regulating part 54 hanging down from the front end of the fixing part 52, and a rear end of the fixing part 52. It is configured to include a plate-shaped elastic section 56 that extends across the lower end of the rectifying section 54 . These structures are constructed by, for example, bending a plate-shaped elastic material into a cylindrical shape having a triangular closed cross section. The fixing part 52 is fixed to the lower surface of the shelf board 48 with screws, with the end of the elastic part 56 overlapping the rear end of the fixing part 52 .

In this configuration, when the six charging units 30 are placed on each shelf board 48, the rectifier 54 hanging down from the fixed part 52 is arranged so as to close the gap formed between the charging units 30. .

Further, the elastic portion 56 is arranged to face the corner of the charging unit 30 when each charging unit 30 is placed on each shelf board 48 . Each charging unit 30 is inserted or removed on the shelf board 48 with the left-right direction of the housing 2 as an insertion/removal direction, and is installed in the first housing portion 2A. When the charging unit 30 is inserted onto the shelf board 48, the elastic portion 56 comes into contact with a corner of the charging unit 30 and is elastically deformed. As a result, when the charging units 30 are in the stored state, the elastic parts 56 supported by the shelf board 48 on the upper side of each charging unit 30 are in close contact with each other so as to hold the upper end corners of the charging units 30, and the rectifying parts 54 This improves the sealing function between units.

With this configuration, the rectifying member 50 allows air passing through the gap provided between the charging unit 30 and the partition wall 29 to flow through the gap between the charging units 30 and between the back panel 22 and the charging unit 30. This prevents it from flowing into the gaps between them. Thereby, air passing through the first flow path R1, which will be described later, through the first intake port P1 of the pedestal section 26 can be restricted from entering the second flow path R2 and the third flow path R3.

FIG. 5 shows an exploded perspective view of the charging unit 30. As shown in this figure, the charging unit 30 has an outer cylinder part 32 formed into an elongated rectangular cylinder shape. An inner cylinder part 34 is arranged inside the outer cylinder part 32 and is formed into a rectangular cylinder shape with an outer diameter one size smaller than that of the outer cylinder part 32 .

A housing space is formed inside the outer cylinder part 32 and between it and the inner cylinder part 34 . In this accommodation space, electric devices that constitute the charging unit 30, such as the above-mentioned rectifier circuit 30A, booster circuit 30B, and converter circuit 30C, are arranged. These electrical devices are fixed to the inner surface of the outer cylindrical section 32 and the outer surface of the inner cylindrical section 34. In this configuration, the outer cylindrical portion 32 constituting the outer layer protects electrical equipment such as the rectifier circuit 30A, the booster circuit 30B, and the converter circuit 30C from rainwater, dust, and the like. Further, the internal space of the inner cylindrical portion 34 constitutes a duct space for dissipating heat generated in the accommodation space provided between the outer cylindrical portion 32 and the inner cylindrical portion 34.

The charging unit 30 is housed inside the casing 2 with the left-right direction of the casing 2 being the axial direction of the outer cylindrical portion 32 . In this state, a rectangular unit intake portion 36 is provided at one end on the left side of the charging unit 30. Furthermore, a rectangular unit exhaust section 38 is provided at the other end on the right side of the charging unit 30.

The unit intake section 36 has a plate-shaped base section 36A that closes the left open end of the outer cylinder section 32, and a unit intake port 36B provided in the base section 36A. The unit intake port 36B includes an intake fan 40 that communicates the inside and outside of the inner cylinder portion 34. This intake fan 40 is arranged to face a fourth intake port P4 provided on the left side of the housing 2. As a result, when the intake fan 40 operates, the air introduced into the housing 2 through the fourth intake port P4 is introduced into the charging unit 30 (inner cylindrical portion 34) from the unit intake port 36B. Ru.

The unit intake section 36 also includes a unit grip section 36C and a wiring connection section 36D. The unit gripping portion 36C is a handle that is gripped when installing or removing the charging unit 30. The wiring connection portion 36D is provided to electrically connect the electrical equipment constituting the charging unit 30 and the wiring drawn out from inside the second housing portion 2B through the partition wall portion 29.

The unit exhaust section 38 has a plate-shaped base section 38B that closes the right opening end of the outer cylinder section 32, and a unit exhaust port 38A provided in the base section 38B. The unit exhaust port 38A is provided as an exhaust port that communicates the inside and outside of the inner cylinder portion 34. This unit exhaust port 38A is arranged opposite to the second exhaust port Q2 provided on the right side of the housing 2. As a result, the air introduced into the charging unit 30 (inner cylindrical portion 34) from the unit intake port 36B by the intake fan 40 is discharged to the outside of the charging unit 30 from the unit exhaust port 38A, and the air is discharged from the second exhaust port Q2. and is discharged to the outside of the casing 2.

In the charging device 1 according to the present embodiment described above, four flow paths (air flows) are formed in the first space S1 of the housing 2, and the heat generated in the charging unit 30 is efficiently radiated. The four channels will be specifically explained below with reference to FIGS. 6 to 9. Note that in each of the figures of FIGS. 6 to 9, for convenience of explanation, inlet ports or exhaust ports that are unnecessary for explanation of the target flow path may be omitted from illustration.

(first flow path)
FIG. 6 schematically shows the first flow path R1 formed in the first space S1. In this first flow path R1, air introduced into the housing 2 from the first intake port P1 by the exhaust fan 46 is directed from the lowest charging unit 30 to the highest charging unit 30 of each charging unit 30. It passes through the sides (the space between each charging unit 30 and the partition wall part 29) and is discharged to the outside of the casing 2 from the first exhaust port Q1. That is, air introduced into the interior from the lower part of the housing 2 passes through the sides of the charging unit 30, rises, and is discharged to the outside from the upper part of the housing 2.

(Second flow path)
FIG. 7 schematically shows the second flow path R2 formed in the first space S1. In this second flow path R2, the air introduced into the housing 2 from the second intake port P2 by the exhaust fan 46 is passed through the side of the charging unit 30 on the upper stage side, and is passed through the first exhaust port Q1. The liquid is discharged to the outside of the housing 2. That is, air introduced into the interior from the top of the housing 2 passes through the side of the charging unit 30 from the intake side to the exhaust side of the charging unit 30, and is discharged from the top of the housing 2 to the outside. Further, in this second flow path R2, a second air intake port P2 is provided in the back panel portion 22 that does not face the unit air intake port 36B of the charging unit 30. Thereby, the air introduced into the housing 2 from the second intake port P2 is configured to flow smoothly to the side of the charging unit 30 without passing through the inside of the charging unit 30.

(Third flow path)
FIG. 8 schematically shows the third flow path R3 formed in the first space S1. In this third flow path R3, the air introduced into the housing 2 from the third intake port P3 by the intake fan 40 of each charging unit 30 passes through the side of the charging unit 30 and then enters the charging unit 30. After passing through the inside of each charging unit 30, it is discharged to the outside of the housing 2 from the second exhaust port Q2. In other words, after the air introduced into the interior from the lower part of the housing 2 passes through the side of the charging unit 30 from the exhaust side to the intake side of the charging unit 30, the air enters the charging unit 30 from the unit intake port 36B. pass through the interior of. Then, it is discharged to the outside of the casing 2 through the unit exhaust port 38A and the second exhaust port Q2. Further, in this third flow path R3, a third intake port P3 is provided in the back panel portion 22 that does not face the unit exhaust port 38A of the charging unit 30. This allows the air introduced into the housing 2 from the third intake port P3 to flow smoothly to the side of the charging unit 30 without being affected by the air flow discharged from the unit exhaust port 38A. There is.

(Fourth channel)
FIG. 9 schematically shows the fourth flow path R4 formed in the first space S1. In this fourth flow path R4, the air introduced into the interior of the housing 2 from the fourth intake port P4 by the intake fan 40 of each charging unit 30 is passed through the inside of the charging unit 30, and is passed through the second exhaust port Q2. The liquid is discharged from the housing 2 to the outside of the housing 2. In other words, the air introduced into the housing 2 from the fourth intake port P4 provided on the left side of the housing 2 passes through the unit intake port 36B of each charging unit 30 and passes through the interior of the charging unit 30. After being exhausted from the unit exhaust port 38A, it is exhausted to the outside from the second exhaust port Q2 provided on the right side of the housing 2.

(action and effect)
As explained above, according to the charging device 1 according to the present embodiment, a plurality of charging units 30 are housed inside the housing 2 in a vertically lined manner. This casing 2 has a first intake port P1 provided at the bottom of the casing 2, and a second intake port P2 and a first exhaust port Q1 provided at the top of the casing 2.

As shown in FIGS. 6 and 7, inside the housing 2, a first flow path R1 and a second flow path R2 are formed. In the first flow path R1, air introduced into the housing 2 from the first intake port P1 is passed through the sides of the charging unit 30 in the direction from the lowest charging unit 30 to the highest charging unit 30. , is discharged to the outside from the first exhaust port Q1. This first flow path R1 generates an airflow inside the housing 2 that rises from the first intake port P1 provided at the bottom toward the first exhaust port Q1 provided at the top. A plurality of charging units 30 arranged in the direction can be cooled.

In the second flow path R2, the air introduced into the interior of the housing 2 from the second intake port P2 is passed through the side of the charging unit 30 on the upper stage side, and is passed through the outside of the housing 2 from the first exhaust port Q1. be discharged. Due to this second flow path R2, an air current is generated inside the housing 2 from the second intake port P2 toward the first exhaust port Q1, which mainly discharges the air in the upper space inside the housing 2 to the outside. , it is possible to promote the flow of air in the upper space within the housing 2, and the charging unit 30 on the upper stage side can be cooled by the airflow.

As described above, according to the charging device 1, it is possible to promote the air flow in the upper space within the housing 2 and improve the thermal arrangement environment of the charging unit 30 on the upper stage side. Heat can be dissipated efficiently.

As shown in FIG. 8, inside the housing 2, a third flow path R3 is formed. In this third flow path R3, air introduced into the interior from the lower part of the housing 2 passes through the sides of the charging unit 30 from the exhaust side to the intake side of the charging unit 30, and then the air enters the unit intake air. It passes through the inside of the charging unit 30 from the port 36B and is discharged to the outside of the housing 2 via the unit exhaust port 38A and the second exhaust port Q2. That is, in the lower space where it is easier to maintain a lower temperature than the upper space inside the casing 2, the air introduced into the casing 2 passes through the sides of the charging unit 30 and then enters the inside of the charging unit 30. Used for air cooling. Thereby, it is possible to suppress a difference in temperature between the inside and outside of the charging unit 30 between the upper side and the lower side of the housing 2, and to average out the temperature distribution inside the housing 2.

As shown in FIG. 9, inside the housing 2, a fourth flow path R4 is formed. In this fourth flow path R4, the air introduced into the interior from the fourth intake port P4 provided on the left side of the housing 2 passes through the inside of the charging unit 30 through the unit intake port 36B, and the air is discharged from the unit exhaust port 36B. After being discharged from the port 38A, it is discharged to the outside from the second exhaust port Q2 provided on the right side of the housing 2. Thereby, the internal temperature of the charging unit 30 can be air-cooled efficiently.

Further, a plurality of fourth intake ports P4 and second exhaust ports Q2 provided on the left and right side surfaces of the housing 2 are provided corresponding to the plurality of charging units 30. Therefore, air from outside the housing 2 can be efficiently introduced into the charging unit 30 from the fourth intake port P4. On the other hand, the second exhaust port Q2 can efficiently exhaust the air exhausted from the charging unit 30 to the outside of the housing 2.

Although the charging device 1 according to the embodiment has been described above, the present invention can be implemented with various changes without departing from the gist thereof. Moreover, it goes without saying that the scope of the rights of the present invention is not limited to the above embodiments. For example, in the embodiment described above, in the second flow path R2, the air introduced into the housing 2 from the second intake port P2 passes through the side of the charging unit 30 in the uppermost stage, and then passes through the first exhaust port Q1. However, the air is discharged not only from the side of the charging unit 30 in the top tier but also the side of the charging unit 30 in the second and third tier from the top. It may also be configured so that it passes through.

1 Charging device for electric vehicles (charging device)
2 Housing 30 Charging unit P1 First intake port P2 Second intake port P3 Third intake port P4 Fourth intake port Q1 First exhaust port Q2 Second exhaust port R1 First flow path R2 Second flow path R3 Third flow path R4 Fourth flow path

Claims (5)

An electric vehicle charging device comprising a casing that houses therein a plurality of charging units that convert power input from an external power source into power for charging the electric vehicle,
The plurality of charging units are housed in a vertically lined state within the housing,
a first intake port provided at the bottom of the housing;
a second intake port provided at the top of the housing;
a first exhaust port provided at the top of the housing;
The air introduced into the housing from the first intake port is passed through the side of the charging unit in the direction from the charging unit at the lowest stage to the charging unit at the top stage, and is then connected to the first exhaust port. a first flow path for discharging from the casing to the outside of the casing;
a second flow path that causes air introduced into the housing from the second intake port to pass through a side of the charging unit on the upper stage side and to be discharged to the outside of the housing from the first exhaust port; An electric vehicle charging device comprising: a third intake port provided in the housing;
a second exhaust port provided in the housing;
The air introduced into the interior of the casing from the third intake port passes through the side of the charging unit and then through the inside of the charging unit, and then flows to the outside of the casing from the second exhaust port. The electric vehicle charging device according to claim 1, further comprising a third flow path for discharging the electric vehicle. The electric vehicle charging device according to claim 2, wherein a plurality of said second exhaust ports are provided corresponding to said plurality of charging units. a fourth intake port provided in the housing;
a fourth flow path that causes air introduced into the housing from the fourth intake port to pass through the charging unit and to be discharged to the outside of the housing from the second exhaust port. The electric vehicle charging device according to claim 2. The electric vehicle charging device according to claim 4, wherein a plurality of said fourth intake ports are provided corresponding to said plurality of charging units.