CN116001561A - Exhaust structure in carriage - Google Patents

Abstract

The invention provides an exhaust structure in a carriage. The vehicle interior exhaust structure is an exhaust structure that exhausts cooling air from a battery disposed in a vehicle interior, wherein a hollow rear floor cross member extending in a vehicle width direction is provided at a rear side of the battery, an introduction hole is formed in a front side surface of the rear floor cross member, the exhaust of the cooling air is introduced into an interior space of the rear floor cross member from the introduction hole, an exhaust hole is formed in a side surface on a downstream side in an exhaust direction of the cross member, and the exhaust introduced into the interior space of the cross member is discharged from the exhaust hole to the outside of the vehicle interior.

Description

Exhaust structure in carriage

Technical Field

The present invention relates to an in-vehicle exhaust structure that exhausts cooling air of an object to be cooled disposed in a vehicle cabin.

Background

The vehicle interior exhaust structure is a structure that exhausts cooling air when air-cooling an object to be cooled, such as a battery, disposed in the vehicle interior. The battery is mounted on a hybrid vehicle or the like, for example, and accumulates electric power for driving a motor for running. Further, the battery is required to be cooled because it is degraded with an increase in temperature.

Japanese patent application laid-open No. 2021-030966 discloses an in-vehicle exhaust structure in which an inner space of a rear cross member is utilized as an exhaust passage to exhaust cooling air of a battery. The rear cross member refers to a reinforcing member of the vehicle body that extends in the vehicle width direction.

Disclosure of Invention

In addition, in consideration of reducing the number of parts of the vehicle interior exhaust structure, there is room for improvement in the vehicle interior exhaust structure disclosed in japanese patent application laid-open No. 2021-030966. For example, in the case where the exhaust can be performed without providing a duct connected to the rear cross member, the number of parts can be reduced without providing a duct.

Accordingly, an object of the present invention is to provide an in-vehicle exhaust structure capable of exhausting without providing a duct.

In the vehicle interior exhaust structure according to the present invention, a hollow cross member extending in a vehicle width direction is provided on a downstream side in an exhaust direction of an object to be cooled, an introduction hole is formed in a side surface of the cross member on an upstream side in the exhaust direction, the exhaust of the cooling air is introduced into the cross member from the introduction hole, and an exhaust hole is formed in a side surface of the cross member on the downstream side in the exhaust direction, and the exhaust gas introduced into the cross member is discharged from the exhaust hole to the outside of the vehicle interior.

In this way, by introducing the exhaust gas into the inside of the cross member from the introduction hole formed on the side surface on the upstream side in the exhaust direction of the cross member, the cooling air of the object to be cooled can be exhausted without providing a duct.

Further, by discharging the exhaust gas from the discharge hole formed on the side surface on the downstream side in the exhaust direction of the cross member to the outside of the cross member, an exhaust passage that utilizes the inside of the cross member can be formed.

In the vehicle exhaust structure according to the present invention, it is preferable that both ends of the cross member in the vehicle width direction are connected to the side garnish in the vehicle cabin, so that the interior of the cross member is communicated with the outside of the side garnish, and the exhaust gas introduced into the interior of the cross member is discharged from the side garnish to the outside of the vehicle cabin.

In this way, by making the inside of the cross member communicate with the outside of the side garnish, it is possible to form an exhaust passage that utilizes the inside of the cross member.

According to the in-vehicle exhaust structure of the present invention, exhaust can be performed without providing a duct. Thus, the number of parts of the exhaust structure in the vehicle cabin can be reduced without providing a duct.

Drawings

The features, advantages, technical and industrial significance of representative embodiments of the present invention will be described in the following drawings for reference purposes, in which like numerals denote like elements.

Fig. 1 is a perspective view of an underfloor space in a vehicle cabin provided with an in-vehicle exhaust structure as an example of an embodiment, as viewed from the front.

Fig. 2 is a cross-sectional view of fig. 1 from II-II.

Fig. 3 is a perspective view when viewed from the rear, showing a vehicle interior provided with an in-vehicle exhaust structure as an example of an embodiment.

Detailed Description

An example of an embodiment of the present invention will be described in detail below. In the following description, specific shapes, materials, directions, numerical values, and the like are examples for facilitating understanding of the present invention, and may be appropriately changed in accordance with the application, purpose, specification, and the like.

'in carriage'

The vehicle cabin 11 provided with the exhaust structure 10 as an example of the embodiment will be described with reference to fig. 1 and 2. In fig. 1, for ease of explanation, the resin upper floor panel 15 and the carpet 16 are not shown.

The exhaust structure 10 is a structure that exhausts cooling air of a battery 20, which is an object to be cooled, disposed in a cabin 11 of a vehicle. Although details will be described later, according to the exhaust structure 10, in particular, the cooling air of the battery 20 can be exhausted without providing a duct. Thus, no piping is required, and the number of parts of the exhaust structure 10 can be reduced.

The vehicle is a hybrid vehicle equipped with the battery 20, and travels by power of an engine and a motor. The vehicle is not limited to a hybrid vehicle, and may be a vehicle such as an electric vehicle on which the battery 20 is mounted.

The cabin 11 is a space partitioned for a passenger to ride in the vehicle. In this example, the cabin 11 further includes a rear seat (not shown), an underfloor space 12 below the feet of an occupant seated in the rear seat, a luggage space 13 in which luggage is stored, and the like.

Accumulator cell "

For example, a lithium ion secondary battery is preferably used as the battery 20. The battery 20 is charged by the brake regeneration device, and supplies electric power to drive the motor. Since the battery 20 is degraded with an increase in temperature, the battery is cooled by the cooling air in the above-described manner.

In the present example, the object to be cooled is the battery 20, but the object to be cooled is not limited to this. The object to be cooled may be a PCU (Power Control Unit: power supply control unit) composed of an inverter, a boost converter, and a DCDC converter, or an ECU (Electronic Control Unit: electronic control unit) for performing hybrid control or automatic driving control.

The battery 20 is disposed in the underfloor space 12 of the vehicle cabin 11. As described above, the underfloor space 12 is a space below the feet of the rear seat and the occupant seated in the rear seat, and is a space partitioned by the rear floor panel 14 and the resin upper floor panel 15. A carpet 16 is placed on the upper floor panel 15, thereby constituting the underfoot (floor surface) of the occupant seated in the rear seat.

As described above, the battery 20 is cooled by the cooling air. The cooling air is sent by a blower (not shown) disposed at the front of the battery 20, passes through the battery 20 in the vehicle front-rear direction, and is exhausted by an exhaust structure 10 disposed at the upper rear of the battery 20 (see arrow mark in fig. 2). The exhaust structure 10 will be described in detail later. Hereinafter, the cooling air to be discharged after cooling the battery 20 will be described as only discharged air.

Exhaust structure "

An exhaust structure 10 as an example of an embodiment will be described with reference to fig. 1 to 3.

As described above, the air discharge structure 10 is a structure that discharges the cooling air of the battery 20. Although the exhaust structure 10 is configured by the rear floor cross member 30 being a hollow cross member that is provided rearward of the battery 20 and extends in the vehicle width direction, the exhaust structure 10 may be configured in combination with side garnish 31 that configures left and right side wall surfaces in the vehicle width direction of the vehicle cabin 11, as required.

Rear floor cross-member "

As shown in fig. 1 and 2, the rear floor cross member 30 is an elongated reinforcing member formed with the vehicle width direction as the longitudinal direction. As described above, the rear floor cross member 30 is disposed rearward of the battery 20 and forward of the luggage space 13.

As described above, the rear floor cross member 30 is hollow in shape, and it has the inner space 30N. In more detail, the rear floor cross member 30 is formed in a substantially hat shape when viewed from the vehicle width direction. The lower end of the rear floor cross member 30 is fixed to the rear floor panel 14, thereby forming a closed cross section.

A plurality of introduction holes 30A are formed in the front side surface 30F of the rear floor cross member 30. The introduction hole 30A is formed as a long hole along the vehicle width direction at the lower end portion of the front side surface 30F. Thereby, by passing the exhaust gas discharged from the underfloor space 12 through the introduction hole 30A, the exhaust gas is easily introduced into the inner space 30N of the rear floor cross member 30.

As shown in fig. 3, a plurality of discharge holes 30B are formed on the rear side surface 30R of the rear floor cross member 30. The formation position and shape of the discharge hole 30B are not particularly limited. Thereby, the exhaust gas introduced into the interior space 30N of the rear floor cross member 30 is discharged toward the luggage space 13 by passing through the discharge hole 30B, and is finally discharged from the luggage space 13 to the outside of the vehicle cabin.

Further, both ends in the vehicle width direction of the rear floor cross member 30 are connected with the side garnish 31 described above as needed. By adopting such a structure, the inner space 30N of the rear floor cross member 30 is communicated with the outer space 31N of the side garnish 31. Thereby, the exhaust gas introduced into the interior space 30N of the rear floor cross-member 30 will be discharged into the outside space 31N of the side garnish 31.

Side ornament "

As described above, the side garnish 31 is a garnish on the left and right sides in the vehicle width direction of the indoor side of the vehicle interior 11 other than the door. The outside space 31N of the side garnish 31 is a space outside the vehicle cabin partitioned by the side garnish 31 and the vehicle body.

Exhaust path "

The exhaust path formed by the exhaust structure 10 will be described with reference to fig. 2. In addition, in fig. 2, the exhaust path is shown by an arrow mark.

The cooling air after cooling the battery 20 flows from the underfloor space 12 toward the upper rear along the rear floor panel 14 as exhaust air, and is discharged from the space between the rear floor panel 14 and the upper floor panel 15.

The exhaust gas discharged from the underfloor space 12 is introduced into the inner space 30N of the rear floor cross member 30 from the introduction hole 30A of the rear floor cross member 30. In this way, in particular, the exhaust gas can be introduced into the internal space 30N of the rear floor cross member 30 by forming the introduction hole 30A in the rear floor cross member 30 without providing a duct or the like.

The exhaust gas introduced into the interior space 30N of the rear floor cross-member 30 is discharged from the discharge hole 30B of the rear floor cross-member 30 toward the luggage space 13. By setting the inner space 30N of the rear floor cross member 30 as the exhaust path in this manner, the exhaust gas discharged from the underfloor space 12 can be discharged to the luggage space 13. Thus, the exhaust gas does not contact the occupant seated in the rear seat.

Further, a part of the exhaust gas introduced into the interior space 30N of the rear floor cross member 30 is discharged from both end portions of the rear floor cross member 30 to the outer side space 31N of the side garnish 31 as needed. By setting the inner space 30N of the rear floor cross member 30 as the exhaust path in this manner, the exhaust gas discharged from the underfloor space 12 can be discharged to the outside space 31N of the side garnish 31, that is, to the outside of the vehicle cabin. Thus, the exhaust gas does not contact the occupant seated in the rear seat.

Effect "

In the exhaust structure 10, the duct is provided effectively when the exhaust path is formed without the exhaust touching the occupant seated in the rear seat. However, in the case of providing a duct, there are many restrictions on space. Further, there are cases where an increase in the air volume is required in consideration of the pressure loss in the duct, resulting in an increase in noise.

According to the exhaust structure 10 of the present embodiment, in particular, the cooling air of the battery 20 can be exhausted without providing a duct. Thus, the above-described problems in installing the pipe do not occur. In addition, no piping is required, so that the number of parts of the exhaust structure 10 can be reduced.

The present invention is not limited to the above-described embodiments and modifications thereof, and can be modified and improved within the scope of the matters described in the claims of the present application.

Claims (2)

1. An in-vehicle exhaust structure for exhausting cooling air of an object to be cooled disposed in a vehicle, the in-vehicle exhaust structure,

at a downstream side in an exhaust direction from the object to be cooled, a hollow-shaped cross member extending in a vehicle width direction is provided,

an introduction hole is formed in a side surface of an upstream side of the cross member in an exhaust direction,

the exhaust gas of the cooling air is introduced from the introduction hole to the inside of the cross member,

a discharge hole is formed on a side surface of a downstream side of the cross member in the exhaust direction,

the exhaust gas introduced into the interior of the cross member is discharged from the discharge hole to the outside of the vehicle cabin.

2. The in-vehicle exhaust structure according to claim 1, wherein,

by connecting both ends of the cross member in the vehicle width direction with the side garnish in the vehicle compartment, the interior of the cross member and the outside of the side garnish are communicated,

the exhaust gas introduced into the interior of the cross member is discharged from the side garnish to the outside of the vehicle cabin.

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