JPH0999727A - Air conditioning duct structure for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an air conditioning duct for an automobile, stabilize walking of an occupant, prevent leakage of a wind, and uniformize the distribution of an air quantity of a blowoff port. SOLUTION: An air conditioning duct 1 which has a width almost equal to a width of a passage F1 and whose upper surface wall 11 is formed as a horizontal plane and has reinforcing ribs 4A, 4B, 4C, 4D and 4E in which the upper end of a reinforcing rib 4 projecting from a lower surface wall 12 comes into contact with the upper surface wall 11 and which is made of a synthetic resin material and is formed as an integral structure by blow molding, is placed and arranged on the passage F1 extending in the longitudinal direction in the center of a floor F of a van type vehicle. Partial reinforcing ribs 4D and 4E are made to act as stream straightening plates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning duct for an automobile, and more particularly to an air conditioning duct structure installed along a floor on which an occupant can walk.

[0002]

2. Description of the Related Art As an air-conditioning duct for a vehicle interior of an automobile, there is one that is installed along the floor from an air-conditioning device in the front of the room and blows conditioned air toward a rear seat (Japanese Utility Model Publication No. 59-182412). Conventionally, as this type of air conditioning duct, as shown in FIG. 3, a pair of left and right symmetrical air conditioning ducts 1A and 1B are provided along the floor F from the air conditioner provided in the lower center of the dashboard D in the front of the passenger compartment. The first duct 1a extending toward the rear seat through the underside of the air conditioning duct, and each of the air conditioning ducts 1A and 1B is divided into three parts. A second duct 1b extending rearward along the lower floor F of the front seat and having an outlet 3 at the rear end, and a second duct 1b which is connected to a side portion of the second duct 1b and extends along the lower floor F of the front seat. There is often used a structure in which a second duct 1b extending rearward in an L shape and connected to a third duct 1c having an outlet 3 parallel to the second duct 1b at the rear end. Then, a carpet is put on the air conditioning ducts 1A and 1B.

In a wagon type vehicle, a passage in the center of the floor extends from the left and right front seats to the left and right front row rear seats (first rear seats) and the left and right rear row rear seats (second rear seats). Air-conditioning ducts are arranged along the air-conditioning duct. As the air-conditioning duct, there is used an air-conditioning duct having a blowout port toward each sheet and connecting a plurality of blow-molded synthetic resin ducts.

[0004]

By the way, in the above-mentioned conventional air-conditioning duct structure provided in the passage in the center of the floor, even if carpet is laid to cover the air-conditioning duct, there is a step between the floor and the air-conditioning duct. When the passenger steps on the air conditioning duct, the air conditioning duct is elastically deformed, which makes the occupant's walking in the vehicle compartment unstable. Further, since the air-conditioning duct has a divided structure, when an occupant steps on the vicinity of the connecting portion, a gap may be generated in the connecting portion, which may cause wind leakage or wind noise.

Therefore, the present invention eliminates the step on the passenger compartment floor and eliminates the deformation caused by the occupant's stepping on,
The task was to realize an air-conditioning duct structure that stabilizes occupant's walking in the passenger compartment, does not cause wind leakage and wind noise, and improves air volume distribution and air flow distribution at each outlet. It is a thing.

[0006]

As shown in FIGS. 1 and 2, the present invention blows on an occupant passage F1 on a floor F from a conditioned air intake 2 with a width substantially equal to the width of the passage F1. An air conditioning duct 1 made by blow molding a synthetic resin material having an integral structure is placed up to the outlets 3A, 3B, 3C, 3D. The air-conditioning duct 1 has an upper surface wall 11 which is a horizontal surface, and a plurality of reinforcing ribs 4 which project upward from the duct and whose upper ends contact the upper surface wall 11 are formed on the lower surface wall 12 (claim 1). Further, the upper surface wall 11 and the lower surface wall 12 are welded to each other by welding the upper ends of the reinforcing ribs 4 to the upper surface wall 11 (claim 3). INDUSTRIAL APPLICABILITY The present invention is particularly effective when applied to a wagon type vehicle having a passage extending in the front and rear direction in the center of the floor (Claim 2), the passage F1 of the floor F has no step, and the reinforcing rib 4 is provided. Because it is not deformed due to trampling, it is easy for occupants to walk. Moreover, since the air-conditioning duct 1 has an integral structure and the connecting portion between the ducts is abolished, there is no risk of air leakage or wind noise.

Further, according to the present invention, in the air conditioning duct 1, a part of the reinforcing rib 4 is provided at a branch portion where the rear outlets 3C and 3D branch. As a result, the part of the reinforcing ribs 4D and 4E act as a current plate.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. By providing a passage in the center of the passenger compartment,
The present invention is applied to a wagon type vehicle in which an occupant can walk between a front seat, a first rear seat in the front row and a second rear seat in the rear row. As shown in FIG. 1 (A),
In the passenger compartment, a passage F1 is formed between the pair of left and right front seats FS1 and FS2 and between the pair of left and right first rear seats RS1 and RS2. The passage F1 is shown in FIG.
As shown in (A) and (B), it is slightly higher than the general surface of the floor F and extends in the vehicle front-rear direction to form a horizontal plane. The first rear seat RS is provided on the passage F1.
1, RS2 and a second rear seat (not shown) are provided with an air conditioning duct 1 for sending conditioned air to the feet of a seated person.
F2 in the figure is an uneven surface formed with a plurality of beads extending in the vehicle width direction to reinforce the floor F and the passage F1.

The air conditioning duct 1 is an integrally molded body formed by blow molding a synthetic resin material, and has a width substantially equal to the width of the passage F1 and a rectangular shape in plan view extending in the vehicle front-rear direction.
At the front end of the air conditioning duct 1, a protrusion 13 is formed on the left side (lower side in FIG. 1A) that protrudes from the front end side surface toward the lower side of the front seat FS2 on the vehicle left side. An air conditioning air intake 2 connected to the air conditioning device 6 is formed at the tip of the. An air conditioning air outlet 3A is formed at the base of the protruding portion 13 so as to project obliquely rearward toward the lower side of the front seat FS2 and has an open front end. Also,
Also on the right side surface of the air conditioning duct 1, the air outlet 3 on the left side surface
Front seat F with symmetrical shape at a position corresponding to A
An air outlet 3B is formed so as to protrude toward the lower side of S1. Further, the area behind the air outlet 3B is concave so as to avoid the cover 71 of the operating lever 7 of the side brake installed in the passage F1.

On the other hand, at the rear end of the air conditioning duct 1, left and right first rear seats RS1 and RS2 are formed with bilaterally symmetrical protruding portions 14 respectively projecting downward from the rear ends thereof. These protrusions 14 are substantially L-shaped and are bent toward the rear of the vehicle.
As shown in (1), the shape of the floor F is adjusted so that the floor F can be bid upward. Air-conditioning air outlets 3C and 3D are formed at the rear end of each protrusion 14.

The air-conditioning duct 1 is in the shape of a rectangular tube having a low height, the upper surface wall 11 is a horizontal surface, and the lower surface wall 12 is
A plurality of mountain-shaped reinforcing ribs 4 protruding toward the inside of the air conditioning duct 1 are formed. That is, the air conditioning duct 1
A plurality of reinforcing ribs 4A are provided in one row at predetermined intervals in the front-rear direction through the center of the narrow portion avoiding the cover 71 of the operating lever 7 of the side brake. In the wide portion of the duct, reinforcing ribs 4B and 4C are formed in rows in the front-rear direction at the center in the width direction and at a position symmetrical with the reinforcing rib 4A. The upper ends of the reinforcing ribs 4A, 4B and 4C are welded to the upper wall 11 of the air conditioning duct 1.

At the front part of the air conditioning duct 1, the air outlet 3A is provided.
On the side, a reinforcing rib 4D having a mountain-shaped cross section and extending slenderly from the front wall of the air conditioning duct 1 toward the center of the duct is formed. Further, in the rear portion of the air conditioning duct 1, a slender reinforcing rib 4E having a mountain-shaped cross section and branching in a Y-shape toward the rear is formed at a branch portion in the center in the width direction. The reinforcing rib 4D is for guiding a part of the conditioned air that has entered from the conditioned air intake 2 to the outlet 3A, and the reinforcing rib 4E is
The conditioned air is diverted and led out to the air outlets 3C and 3D, both of which function as a current plate.
The upper ends of the reinforcing ribs 4D and 4E are welded to the upper wall 11 of the air conditioning duct 1.

As shown in FIGS. 1 (A) and 1 (B), the air-conditioning duct 1 is placed on a passage F1 of a floor F so as to be aligned with the passage F1 and is projected from the front end of the air-conditioning duct 1. The stay portion 5A protruding from the portion 5 and the left and right protruding portions 14 at the rear end is fastened and fixed to stud bolts provided on the passage F1 and the floor F, and a fixed seat surface 5B provided substantially at the center of the air conditioning duct 1. Is fastened and fixed to the stud bolt of the passage F1 to fix the air conditioning duct 1.
Then, as shown in FIGS. 2A and 2B, the carpet 8 is spread over the upper surface of the air conditioning duct 1 and the entire surface of the floor F via the cushion member 9.

According to this embodiment, since the air-conditioning duct 1 having a width substantially equal to that of the passage F1 is installed in the passage F1, there is no step in the passage. Moreover, since the air-conditioning duct 1 has a wide width, it is reinforced by providing a plurality of reinforcing ribs 4 inside the air-conditioning duct 1. Therefore, even if an occupant walks on the air-conditioning duct 1, the air-conditioning duct 1 is deformed by the trampling. It is easy for occupants to walk. In addition, since the air conditioning duct 1 has an integral structure of blow-molded bodies and the connecting structure between the ducts is abolished, there is no risk of air leakage or wind noise.

A part of the reinforcing ribs 4D of the air conditioning duct 1,
4E reinforces the air conditioning duct 1 and also functions as a rectifying plate for conditioned air. The reinforcing ribs 4D convert the conditioned air flowing laterally from the conditioned air intake 2 into a smooth vertical flow, and a part of the conditioned air is smoothly discharged from the air outlet 3A. In addition, the reinforcing ribs 4E allow the conditioned air flowing backward in the air conditioning duct 1 to project to the left and right protrusions 1
4, the flow splits in the left-right direction, flows smoothly and uniformly into both protrusions 14, and is discharged from the outlets 3C and 3D.

[0016]

According to the air-conditioning duct of the present invention, the level difference on the floor of the passenger compartment is eliminated, the deformation caused by the passenger's stepping is eliminated to stabilize the passenger's indoor walking, and the generation of wind leakage and wind noise. Therefore, it is possible to improve the air flow distribution and the air flow of the air outlets.

[Brief description of drawings]

1 shows an air conditioning duct of the present invention, and FIG.
Is a plan view thereof, and FIG. 1 (B) is a side view thereof.

2A is a cross-sectional view taken along the line IIA-IIA in FIG. 1A, and FIG. 2B is IIB-IIB in FIG. 1A.
It is sectional drawing in the position along a line.

FIG. 3 is a perspective view showing a structure of a conventional air conditioning duct.

[Explanation of symbols]

 F floor F1 passage 1 air conditioning duct 11 upper surface wall 12 lower surface wall 2 conditioned air intake 3,3A, 3B, 3C conditioned air outlet 4,4A, 4B, 4C, 4E reinforcing ribs

Claims (4)

[Claims] 1. An air-conditioning duct, which is arranged along a passage on a floor of an automobile, has an air-conditioning air intake connected to an air-conditioning device at one end, and has a plurality of air-conditioning air outlets at the other end, The air-conditioning duct has a width substantially equal to the passage width, the upper surface wall is a horizontal surface, and the upper end of the reinforcing rib protruding from the lower surface wall is made of a blow molded body of a synthetic resin material abutting against the upper surface wall. Characteristic automobile air-conditioning duct structure. 2. The air conditioning duct structure for an automobile according to claim 1, wherein the air conditioning duct is provided in a passage extending in the front-rear direction at the center of the floor of the wagon type vehicle. 3. The air conditioning duct structure for an automobile according to claim 1, wherein the upper ends of the reinforcing ribs are welded to and joined to the upper wall. 4. A straightening vane for branching a rear portion of the air conditioning duct to form a plurality of air outlets, and forming a part of the reinforcing ribs at the bifurcation portion to control an air blowing amount of the air outlet. The automobile air-conditioning duct structure according to 1.