Cooling device for on-vehicle charging unit

Abstract

To suppress exhaust air leakage due to a drain hole of an exhaust duct.SOLUTION: A cooling device includes a cooling blower for ventilating the interior of a charging unit and an exhaust duct that guides exhaust air from a casing of the charging unit by means of the cooling blower. The exhaust duct extends diagonally upward from its upstream end toward its downstream end, and in an intermediate part of the exhaust duct, its lower surface has a recessed shape that is recessed downward. A drain hole is formed within the range of this recessed shape.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a cooling device for air-cooling a charging unit mounted on a vehicle. [Background technology]

[0002] Patent Document 1 describes a cooling device for air-cooling a vehicle battery. The intake duct of the cooling device has a water drain hole, and moisture and the like that has entered the intake duct can be discharged to the outside. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2018-79906 Summary of the Invention [Problem to be solved by the invention]

[0004] The above-mentioned drain holes can also be provided in the exhaust duct of the cooling device. However, when the exhaust duct has a drain hole, exhaust air leakage occurs through the drain hole. This specification provides a technology that can suppress exhaust air leakage through the drain hole. [Means for solving the problem]

[0005] This specification discloses a cooling device for air-cooling a charging unit mounted on a vehicle. The cooling device includes a cooling blower for ventilating the inside of the charging unit, and an exhaust duct for guiding the exhaust air from the casing of the charging unit by the cooling blower. The exhaust duct extends obliquely upward from the upstream end to the downstream end, and the lower surface of the intermediate portion of the exhaust duct has a recessed shape recessed downward, and a drain hole is formed within the recessed shape.

[0006] In the above-described configuration, a recess is provided around the drain hole, which prevents the main flow of exhaust air flowing through the exhaust duct from flowing near the drain hole, thereby suppressing exhaust air leakage through the drain hole. [Brief description of the drawings]

[0007] [Figure 1] 1 shows a schematic configuration of a cooling device. [Diagram 2] 2 is an enlarged cross-sectional view of an exhaust duct in part II of FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS EXAMPLES

[0008] A vehicle 10 equipped with a cooling device 20 of an embodiment will be described with reference to the drawings. As shown in Fig. 1, the vehicle 10 includes a vehicle body 12, a seat 14, a charging unit 16, a battery 18, and a driving motor (not shown) in addition to the cooling device 20. The vehicle 10 is an electric vehicle that drives the driving motor using power supplied from the battery 18. The battery 18 is composed of a plurality of secondary battery cells that can be charged and discharged.

[0009] Here, the directions of the cooling device 20 in the drawings correspond to the directions when the cooling device 20 is mounted on the vehicle 10, i.e., the directions of the vehicle 10. In the drawings, the direction FR indicates the front in the fore-aft direction of the vehicle 10, and the direction RR indicates the rear in the fore-aft direction of the vehicle 10. Furthermore, the direction LH indicates the left in the left-right direction of the vehicle 10, and the direction RH indicates the right in the left-right direction of the vehicle 10. Furthermore, the direction UP indicates the upward direction in the vertical direction of the vehicle 10, and the direction DW indicates the downward direction in the vertical direction of the vehicle 10.

[0010] The vehicle body 12 has a floor panel 12f. A battery 18 is disposed under the floor panel 12f. The vehicle body 12 has a cabin 12c and a luggage space 12b therein. The cabin 12c and the luggage space 12b are defined on the floor panel 12f. A seat 14 in which a passenger of the vehicle 10 sits is disposed in the cabin 12c. The seat 14 is a rear seat disposed at the rear of the cabin 12c. The luggage space 12b is located behind the seat 14.

[0011] The charging unit 16 is disposed under the seat 14 in the cabin 12c. The charging unit 16 has a charger (not shown) and a casing 16a that houses the charger. The charger is a type of power converter and includes a converter and / or an inverter. The charger converts power supplied from an external power source into charging power and supplies it to the battery 18. The casing 16a is a housing member. A cooling device 20 is attached to the casing 16a.

[0012] Cooling device 20 includes cooling blower 22 and exhaust duct 24. Cooling device 20 air-cools charging unit 16. Cooling blower 22 has a fan. Cooling blower 22 drives the fan to ventilate the inside of charging unit 16. In detail, cooling blower 22 is attached to casing 16a, and is configured to suck in and exhaust air inside casing 16a.

[0013] The exhaust duct 24 is a long cylindrical member. The exhaust duct 24 is a member that guides the exhaust air from the casing 16a by the cooling blower 22. The upstream end 24a of the exhaust duct 24 is connected to the cooling blower 22. The downstream end 24b of the exhaust duct 24 is located in the luggage space 12b. The exhaust duct 24 extends obliquely upward from the upstream end 24a to the downstream end 24b. The downstream end 24b of the exhaust duct 24 is an exhaust port 24d that exhausts the exhaust air from the charging unit 16 to the luggage space 12b. The specific position of the cooling blower 22 is not particularly limited. The cooling blower 22 may be provided in the casing 16a, may be provided on the intake side in the casing 16a, or may be provided on the exhaust duct 24. In these cases, the upstream end 24a of the exhaust duct 24 may be directly connected to the casing 16a.

[0014] As shown in FIG. 2, the middle portion 24c of the exhaust duct 24 has a recessed shape 24f in the lower surface 24e. A drain hole 24g is formed within the recessed shape 24f of the exhaust duct 24. The drain hole 24g is a through hole extending from the inner surface to the outer surface of the exhaust duct 24. As described above, the exhaust duct 24 is inclined obliquely upward toward the downstream end 24b. Therefore, moisture and the like that has entered the exhaust duct 24 from the exhaust port 24d of the downstream end 24b may reach the cooling blower 22 or the charging unit 16 through the exhaust duct 24. For this reason, the middle portion 24c of the exhaust duct 24 has a drain hole 24g formed in the lower surface 24e. As a result, moisture and the like that has entered the exhaust duct 24 is discharged to the outside through the drain hole 24g.

[0015] On the other hand, if the exhaust duct 24 has a water drain hole 24g, exhaust air leakage occurs through the water drain hole 24g. In this regard, the exhaust duct 24 according to the present technology has a recessed shape 24f around the water drain hole 24g. This prevents the main flow of exhaust air flowing through the exhaust duct 24 from flowing near the water drain hole 24g, thereby suppressing exhaust air leakage through the water drain hole 24g.

[0016] In particular, in exhaust duct 24 of this embodiment, water drain holes 24g are provided in a range on the upstream side of recessed shape 24f, where the cross-sectional area of ​​exhaust duct 24 increases. With this configuration, exhaust air in exhaust duct 24 is less likely to flow into the vicinity of water drain holes 24g, and exhaust air leakage through water drain holes 24g is effectively suppressed. [Explanation of symbols]

[0017] 10: vehicle, 16: charging unit, 16a: casing, 20: cooling device, 22: cooling blower, 24: exhaust duct, 24a: upstream end, 24b: downstream end, 24c: middle part, 24e: underside, 24f: recessed shape, 24g: drain hole

Claims

[Claim 1] A cooling device for air-cooling a charging unit mounted on a vehicle, comprising: a cooling blower for ventilating the inside of the charging unit; an exhaust duct that guides exhaust air from a casing of the charging unit by the cooling blower; Equipped with The exhaust duct extends obliquely upward from an upstream end to a downstream end, In the middle portion of the exhaust duct, the lower surface has a recessed shape recessed downward, and a drain hole is formed within the recessed shape. Cooling device.

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