JP3106847B2 - External air intake structure for air conditioning - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outside air intake structure for air conditioning of a motor vehicle.

[0002]

2. Description of the Related Art Conventionally, as an outside air intake structure for air conditioning of a vehicle, a traveling wind is introduced into an outside air intake formed in a cowl box serving as a windshield mounting portion, and is taken into an air conditioning unit. There was a method. However, in recent years, there has been a demand for securing as large a living space as possible in the passenger compartment, and thus the passenger compartment length has tended to be gradually widened. Within the prescribed vehicle length range, the length of the engine compartment has been increased by the length of the passenger compartment. As the length of the engine room is shortened, there is a problem that maintenance of the engine such as inspection, repair, and detachment is deteriorated. This occurs because the engine interferes with the cowl box, especially when the engine is detached. Therefore, the traveling wind introduction path having the outside air intake is integrated with the bonnet, and the traveling wind introduction path is moved upward together with the bonnet when the hood is opened, so that the maintainability of the engine is not impaired even in a short engine room. An outside air intake structure for air conditioning is disclosed in JP-A-61-282114.

[0003]

However, in the technology disclosed in the above publication, a hole for draining water is provided in the traveling wind introduction path at the time of rain or during car washing. However, there is a problem that air enters the air conditioning unit together with air. In addition, since the traveling wind introduction path is provided so as to face the engine room, when the air conditioning unit is operated, air is sucked from the drain hole and air in the engine room is also sucked. There is a problem that air in the vehicle interior is polluted.

[0004] The present invention solves the above-mentioned problems, and reliably discharges water to the outside of the vehicle without impairing the maintainability of the engine even in a short engine room, and furthermore, does not pollute the air in the vehicle interior. The purpose is to provide an entry structure.

[0005]

According to the first aspect of the present invention,
A hood that covers the engine room and has a hood outside air intake for taking in outside air, and a vehicle that has a duct outside air intake attached to the back of the hood and that communicates with the hood outside air intake at the center in the vehicle width direction. An air duct having a compartment side duct opening provided with a compartment side duct on the side in the width direction and an outside duct opening provided with an outside duct, and in the vicinity of the compartment side duct opening inside the air duct, A rib disposed between the compartment side duct opening and the outside duct opening and between the compartment side duct opening and the duct outside air intake; And is extended to a location where a negative pressure is generated.

According to a second aspect of the present invention, in the air-conditioning outside air intake structure of the first aspect, the outside duct further extends to a rear upper portion of a front grill along a back surface of the hood. It is characterized by.

[0007] The invention described in claim 3 is claim 1 or 2.
The air-conditioning outside air intake structure according to the above, further characterized in that the vehicle exterior duct has a valve therein.

[0008]

[0009]

[0010]

[0011]

[0012]

[0013]

[0014]

According to the first aspect of the present invention, the outside air and water taken into the air duct through the hood outside air intake and the duct outside air intake are separated by the rib, and the water is provided outside the vehicle outside the duct opening outside the vehicle. It flows into the duct and is discharged outside the vehicle by negative pressure.

According to the second aspect of the present invention, the outside air and water taken into the air duct through the hood outside air intake and the duct outside air intake are separated by the rib, and the water is provided outside the vehicle outside the vehicle outside duct opening. It flows into the duct, flows along the inside of the vehicle outside duct along the inclination of the hood, and is discharged to the outside of the vehicle from the upper rear part of the front grill by negative pressure.

According to the third aspect of the present invention, the valve provided in the vehicle outside duct allows water to flow outside the vehicle, and prevents the inflow of air from outside the vehicle.

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

FIG. 1 is a schematic side view of a front portion of an automobile showing an outside air intake structure for air conditioning employing an embodiment of the present invention.
FIG. 2 is a partial perspective view of an external air intake structure for air conditioning employing one embodiment of the present invention.

In FIG. 1, a hood denoted by reference numeral 1 is provided in front of the vehicle body of the automobile, and a deck panel 4, an instrument panel 5, a windshield 6, an engine room X, and a vehicle Known members such as a dash panel 7 for dividing the room Y are arranged. The bonnet 1 covers the upper part of the engine room X, and is provided rotatably in the direction of the arrow in the drawing with one end thereof as a fulcrum. A plurality of bonnet outside air intakes 1a for taking in outside air are formed near the end of the bonnet 1 on the side where the fulcrum is provided.

An air duct 2 is provided on the back of the bonnet 1.
Are provided integrally with the hood 1. As shown in FIG. 2, the air duct 2 is formed to be wide in the vehicle width direction, and has a hollow box shape with a central portion constricted. Are formed so as to communicate with the bonnet outside air intake 1a. Air duct 2
Outside duct openings 2b, 2b are formed on the left and right sides of the bottom plate 2e of the vehicle front side, and one of the outside duct openings 2b is formed.
A vehicle compartment side duct opening 2c is formed on the rear side of the vehicle.

Inside the air duct 2 and near the vicinity of the compartment-side duct port 2c, the area around the compartment-side duct port 2c is
A rib 3 covering the side is provided. The rib 3 is shown in FIG.
As shown in (a) and (b), the central portion is a plate material bent at a substantially right angle, and a leg 3a is formed at the lower end. The height of the rib 3 is formed to be approximately half the internal height of the air duct 2, and the upper end thereof forms an opening 3b. The rib 3 is attached to the leg 3 by bonding or screwing.
The lower surface of “a” and both side ends 3 c and 3 d are fixed inside the air duct 2.

On the lower surface of the bottom plate 2e, corresponding to the outside duct openings 2b, 2b, outside ducts 8, 8 are attached, respectively. In FIG. 2, only one of the outside ducts 8, 8 is shown, and the other is omitted. The vehicle exterior duct 8 is formed of a rectangular cylinder which is wide in the horizontal direction, and both ends thereof are bent in mutually opposite directions in the vertical direction. One end 8a of the vehicle exterior duct 8 bent upward is fixed to the lower surface of the bottom plate 2e around the vehicle exterior duct opening 2b by bonding or screwing. It is supported so as to extend slightly inclining toward the front of the vehicle. The other end 8b of the vehicle exterior duct 8 that is bent downward is located at the upper rear of the front grille 9 disposed at the front end of the vehicle, and has its opening directed substantially directly below. A well-known radiator 1 is provided below the vehicle exterior duct 8.
0, a bumper 11, a chassis member 12, and the like.

One end 8 of the inside of the outside duct 8 is located closer to the center than the center.
A valve 13 is mounted near the a side. As shown in FIG. 4, the valve 13 includes a valve body 13a, a base 13b, and a weight 13c. The base 13b is rotatably supported by a mounting plate 14 fixed to the vehicle outside duct 8. 4 between a closed position indicated by a solid line and an open position indicated by a two-dot chain line. The valve 13 is
Normally, the end on the side where the weight 13c is attached is brought into contact with a stopper 15 fixed to the vehicle outside duct 8 by its own weight, and water that has entered the inside of the air duct 2 is exposed to the vehicle outside duct opening 2b. It is configured to be opened by the weight of water when flowing into the interior of the vehicle outside duct 8.

A first compartment side duct 16 as a hood side duct is mounted on the lower surface of the bottom plate 2e at a position corresponding to the compartment side duct opening 2c. The first passenger compartment-side duct 16 has a substantially rectangular tube shape that is wide in the horizontal direction, and is bent in an elbow shape at a central portion thereof.
One end 16a of the first compartment side duct 16 is fixed to the lower surface of the bottom plate 2e around the compartment side duct opening 2c by bonding or screwing, and the first compartment side duct 16 is connected to the rear end 16b. It is supported substantially horizontally toward the passenger compartment Y.

On the vehicle rear side of the first compartment side duct 16,
Second compartment side duct 17 as dash panel side duct
Are arranged. The second compartment side duct 17 has the same rectangular cross section as the first compartment side duct 16. The rear end 17a of the second compartment side duct 17 is fixed to the dash panel 7 by bonding or screwing, and the front end 17b of the second compartment side duct 17 is sealed via a sealing member 18 made of an elastic material such as rubber or urethane. It is connected to the rear end 16b of the room-side duct 16.

On the vehicle rear side of the second compartment side duct 17,
An air conditioner 19 that blows air toward the passenger compartment Y is provided. The air conditioner 19 includes an outside air introduction unit 19a, a switching plate 19b,
It has an inside air inlet 19c and the like, and the front end 19d of the outside air inlet 19a is fixedly supported by the dash panel 7. Here, the front end 19d is fixed at a position corresponding to the rear end 17a, and a hole (not shown) is formed in the dash panel 7 between the front end 19d and the rear end 17a. It is configured to communicate with the part 19a. The switching plate 19b is connected to the rear end 1 of the outside air introduction portion 19a.
9e is swingably supported. When an inside / outside air changeover switch (not shown) is placed at the outside air introduction position, the inside air introduction port 19c is closed at the solid line position in FIG. 1, and when it is placed at the inside air circulation position, outside air is introduced. The switching unit (not shown) selectively switches to a position indicated by a two-dot chain line in the figure that covers the portion 19a.

When the inside / outside air changeover switch is set to the outside air introduction position when the engine is stopped during car washing or during rainfall, the inside / outside air intake 1a and the duct outside air intake 2a enter the inside of the air duct 2 through the outside air introduction position. Water is rib 3
Is prevented from entering the passenger compartment side duct port 2c by the vertical wall of the vehicle, and the vehicle side ducts 8
Introduced to. Then, the valve 13 is opened by its own weight, and flows out of the vehicle from the other end 8b. On the other hand, outside air
From the opening 3b, it reaches the air conditioner 19 through the first compartment side duct 16 and the second compartment side duct 17.

When the inside / outside air changeover switch is located at the outside air introduction position during running of the vehicle during rainfall, water that has entered the inside of the air duct 2 flows out of the vehicle from the other end 8b in the same manner as described above. At that time, the other end 8b
As shown in FIG. 1, the air flow taken in from the front grill 9 as the vehicle travels acts as a negative pressure as indicated by an alternate long and short dash line arrow, and assists the discharge of water from the other end 8b. Outside air is taken into the air conditioner 19 through the opening 3b in the same manner as described above.

When the air conditioner 19 operates, the air inside the air duct 2 is actively taken into the air conditioner 19. At this time, the outside air is supplied only from the duct outside air intake 2a, and the outside air from the other end 8b is shut off by the valve 13.

When performing engine maintenance for a vehicle having the air-conditioning outside air intake structure described in the above embodiment,
As shown in FIG. 5, when the bonnet 1 is opened, the air duct 2, the outside duct 8, and the first compartment side duct 16 move upward simultaneously with the bonnet 1, so that the maintainability of the engine is not impaired.

In the above embodiment, the air duct 2 and the ribs 3 are fixed separately, but the ribs may be integrated with the air duct 2 as shown in FIGS. 6 (a) and 6 (b). Further, in place of the rib 3, FIGS.
As shown in FIGS. 9 (a) and 9 (b), ribs 20 and 21 which cover three sides around the passenger compartment side duct opening 2c, or FIGS.
As shown in (b), a rib 22 that covers four sides around the compartment side duct opening 2c may be used. Also, the first compartment side duct 1
6. Instead of the second compartment side duct 17 and the seal member 18, as shown in FIG. 10, the first compartment side duct 23 whose press contact portion is inclined downward toward the compartment Y side, and the second car The room side duct 24 and the sealing material 25 may be used. With such a configuration, the gravity load on the sealing material 25 is reduced, and the durability of the sealing material 25 can be improved.

Further, in the above embodiment, the valve 13 is closed by its own weight. However, the valve 13 may be urged toward the outside duct opening 2b by a spring or the like. Valve 1 made of an elastic member
The valve 13 may be opened by the modification of the third embodiment. Further, in the above-described embodiment, the vehicle exterior duct 8 is extended to the rear upper portion of the front grille 9; You may.

[0038]

According to the first aspect of the present invention, the outside air and the water are reliably separated by the rib provided in the air duct to prevent a problem that the water enters the air conditioner, and also to prevent the air from flowing into the air conditioner. By using the negative pressure, it is possible to positively discharge water from the vehicle outside duct to the outside of the vehicle.

According to the second aspect of the present invention, the water in the vehicle outside duct flows along the inclination of the bonnet, so that the water can be efficiently discharged from the vehicle outside duct to the outside of the vehicle. In addition, since the vehicle exterior duct extends along the back surface of the hood, a reduction in the engine room space due to the vehicle exterior duct piping can be minimized. .

According to the third aspect of the invention, the valve blocks the flow of air from the outside duct without obstructing the flow of water, so that the intrusion of water into the air conditioner and the air in the vehicle compartment are prevented. Contamination can be prevented at the same time.

[0041]

[0042]

[0043]

[0044]

[0045]

[0046]

[Brief description of the drawings]

FIG. 1 is a schematic side view of a front portion of an automobile showing an outside air intake structure for air conditioning employing an embodiment of the present invention.

FIG. 2 is a partial perspective view of an outside air intake structure for air conditioning employing one embodiment of the present invention.

3A and 3B are a partial cross-sectional plan view and a partial side view of an air duct and a rib illustrating an embodiment of the present invention.

FIG. 4 is a partial side sectional view of an outside duct for explaining an embodiment of the present invention.

FIG. 5 is a schematic side view of a front portion of a vehicle showing an air-conditioning outside air intake structure for explaining an embodiment of the present invention.

6A and 6B are a partial cross-sectional plan view and a partial side view of an air duct and a rib illustrating a modification of the present invention.

FIGS. 7A and 7B are (a) a partial plan sectional view and (b) a partial side view of an air duct and a rib illustrating another modified example of the present invention.

8A and 8B are a partial cross-sectional plan view and a partial side view of an air duct and a rib illustrating another modified example of the present invention.

FIG. 9 is a (a) partial cross-sectional view and (b) a partial side view of an air duct and a rib illustrating another modified example of the present invention.

FIG. 10 is a partial sectional side view showing a joint between a hood-side duct and a dash panel-side duct for explaining another modification of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Bonnet 1a Bonnet outside air intake 2 Air duct 2a Duct outside air intake 2b Vehicle outside duct opening 2c Car room side duct opening 3,20,21,22 Rib 3b Opening 6 Windshield 8 Vehicle outside duct 9 Front grille 13 Valve 16,23 Bonnet side duct (first compartment side duct) 17, 24 Dash panel side duct (second compartment side duct) X Engine room

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60H 1/28

Claims (3)

(57) [Claims] 1. A bonnet which covers an engine room and has a bonnet outside air intake for taking in outside air, and a bonnet attached to a back surface of the bonnet, the center in the vehicle width direction.
Having a duct outside air intake communicating with the bonnet outside air intake in the portion, a vehicle interior side duct opening provided with a vehicle interior side duct on the lateral side of the vehicle width direction, and an vehicle exterior side duct opening provided with an external vehicle side duct. An air duct having the airbag, and a vicinity of a periphery of the compartment-side duct opening inside the air duct.
In the between the casing-side duct opening and the vehicle outer duct opening
And a rib which is disposed and between the duct outside air inlet and the casing-side duct opening, the vehicle outer duct, characterized in that it is extended to a point of occurrence of negative pressure while the vehicle is traveling Outside air intake structure for air conditioning. 2. The air-conditioning outside air intake structure according to claim 1, wherein the vehicle outside duct extends along a back surface of the hood to a rear upper portion of a front grill. 3. The air-conditioning outside air intake structure according to claim 1, wherein the vehicle outside duct has a valve therein.