JPH11301313A - Duct part structure of automobile air-conditioning facilities - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve installing performance of a side defroster duct and an air conditioning duct. SOLUTION: A side defroster duct component 30 having an open sectional shape is attached on a back side face of an instrument panel 2 so that a side defroster duct having a closed sectional shape is formed between those, and then, both side parts of the side defroster duct component 30 are bent so that an air guide part 31 leading to a side defroster grille 4 formed in the instrument panel 2 is formed. Flow straightening plates 32 straightening flows of air blown out from the side defroster grille 4 are provided near an entrance part of the side defroster grille 4 in the air guide part 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct structure of a vehicle air conditioner.

[0002]

2. Description of the Related Art Automobiles are equipped with air conditioning equipment. As the air conditioner, a side defroster duct that blows wind toward the front door window to prevent fogging of the front door window, and blows wind into the vehicle interior to adjust the temperature in the vehicle interior. Air conditioning ducts and the like are provided on the instrument panel.

FIGS. 9 to 11 show a conventional side defroster duct. An air conditioning unit (not shown) is provided substantially below the center of the instrument panel 2, and an air intake 3 is connected to the air conditioning unit. A tubular side defroster duct 1 extends from the air inlet 3 to the left and right along the front edge of the instrument panel 2. The tubular side defroster duct 1 is disposed apart from the instrument panel 2. Both ends of the side defroster duct 1 are bent and connected to a side defroster grill 4 provided on the instrument panel 2. At this time, the bend of the side defroster duct 1 is extended in the direction in which the wind from the side defroster grill 4 blows out, and
I am trying to be.

According to the above configuration, the wind from the air conditioning unit (not shown) enters the side defroster duct 1 from the air intake 3, passes through the side defroster duct 1 and the wind run-up portions 5 at both ends, and passes through the instrument panel 2. Is blown out from the side defroster grill 4 formed toward the front door window (not shown) to prevent the front door window from becoming cloudy.

At this time, the wind run-up portions 5 formed at both ends of the side defroster duct 1 are provided with side defroster grills 4.
It has the function of controlling the direction of the wind blown out of the wind and stabilizing the flow of the wind.

FIGS. 12 to 16 show a conventional air conditioning duct. A ventilator grille mounting opening 9 for mounting a center ventilator grille 8 is provided at the center of the rear surface 7 of the instrument panel 2. A ventilator grill attachment opening 11 for attaching a driver side ventilator grille 10 is provided at a right end portion of the rear surface 7 of the instrument panel 2, and a ventilator for attaching a passenger seat side ventilator grill 12 at a left end portion. A grill attachment opening 13 is provided. Further, an airbag attachment opening 16 for attaching a passenger-seat-side airbag unit 15 is formed in a portion of the upper surface 14 of the instrument panel 2 on the passenger seat side.

[0007] An air conditioning duct component 6 having a substantially U-shaped (or upward U-shaped) open cross section is fixedly abutted on the lower surface side of the instrument panel 2.
An air conditioning duct having a closed cross section is formed between the air conditioning duct and the instrument panel 2. The air conditioning duct component 6 is fixed to the instrument panel 2 using an adhesive or the like. Alternatively, it may be fixed by using a heat welding agent such as hot melt. Alternatively, it may be fixed by vibration welding or hot plate heating welding. Alternatively, a flange may be formed on the air conditioning duct component 6 and the flange portion may be fixed by screwing.

The air-conditioning duct member 6 has an air inlet 3 at the lower center thereof for connecting to an air-conditioning unit 17 provided substantially below the center of the instrument panel 2. The rear wall is provided with a ventilator grill insertion opening 19 for fitting the insertion end 18 of the center ventilator grill 8. Similarly,
A ventilator grill insertion opening 21 for fitting the insertion end 20 of the driver side ventilator grill 10 is provided in the right end wall portion of the air conditioning duct component 6, and an assistant is provided in the left end wall portion. A ventilator grill insertion opening 23 for fitting the insertion end 22 of the seat side ventilator grill 12 is provided.

Further, the respective ventilator grill mounting openings 9, 11, 13 of the instrument panel 2 and the corresponding ventilator grill insertion openings 1 of the air conditioning duct component 6 are provided.
9, 21, and 23 are separated from each other and are connected to each other by a center ventilator grill 8, a driver-side ventilator grill 10, and a passenger-side ventilator grill 12. Then, the insertion end 18 of the center ventilator grill 8, the insertion end 20 of the driver side ventilator grill 10, and the passenger side ventilator grill 12
A sponge 24 for fitting to the corresponding ventilator grill insertion opening 19, 21, 23 of the air-conditioning duct component 6 is attached to the outer periphery of the insertion end 22.

The air-conditioning duct component 6 has a front detour portion 26 in which the portion on the driver's seat side detours forward to avoid interference with the meter display portion 25. The portion on the passenger seat side is a rear detour portion 27 that detours rearward to avoid detour with the passenger seat side airbag unit 15. As described above, the air-conditioning duct component 6 has a substantially U-shaped cross section as a whole.
The air conditioner 7 has a partially L-shaped cross-section because the air-conditioning duct having a closed cross-section can be formed by using a corner portion between the upper surface 14 and the rear surface 7 of the instrument panel 2. Further, a front turn-back portion 28 is formed at an end of the rear detour portion 27 on the passenger seat side in the air-conditioning duct component 6 in order to secure a required flow passage area.

According to the above configuration, the wind from the air conditioning unit 17 enters the air conditioning duct component 6 from the air inlet 3, passes through the air conditioning duct component 6, and a part of the outlet of the center ventilator grill 8. From the vehicle. Further, a part of the air is blown into the vehicle interior from the air outlet of the driver side ventilator grill 10 through the front detour portion 26. Furthermore, a part is formed in the rear detour part 27 and the front turn-back part 2.
8, the air is blown into the passenger compartment from the air outlet of the ventilator grille 12 on the passenger seat side. Thereby, the temperature in the vehicle compartment is adjusted.

[0012]

However, such a conventional duct structure of a vehicle air conditioner has the following problems.

That is, in the conventional side defroster duct 1, in order for the wind run-up portions 5 formed at both ends to perform the function of controlling the direction of the wind and stabilizing the flow of the wind, the wind run-up portion is usually provided. The length a must be about 100 mm or more, and there is a problem that if the wind run-up section 5 having a sufficient length is secured, space efficiency is poor.

Also, in the general part, since the tubular side defroster duct 1 is provided apart from the instrument panel 2, the space efficiency in the instrument panel 2 is low, and the rigidity of the instrument panel 2 is improved. Also does not contribute.

On the other hand, in the conventional air-conditioning duct component 6, when the portion of the air-conditioning duct component 6 on the passenger seat side is the rear detour portion 27 to avoid the passenger seat-side airbag unit 15, the above is described. At the end of the rear detour 27 so as to secure a required flow area.
However, the front turn-back portion 28 has a restriction that a required flow path area cannot be secured unless the dimensions b and c in FIG. It has been difficult to make the layout of the portion 27 avoiding interference with the passenger side airbag unit 15. Further, since the front turn-back portion 28 changes the direction of the flow of the wind by 180 degrees, an increase in pressure loss cannot be avoided.

Furthermore, the insertion end 18 of the center ventilator grill 8 and the insertion end 2 of the driver side ventilator grill 10
A sponge 24 is attached to the outer periphery of the insertion end 22 of the ventilator grille 12 of the passenger seat side and the passenger side, however, the sponge 24 has poor airtightness.
0 and the ventilator grille 12 on the passenger seat side are attached to the ventilator grille mounting openings 9 and 1 of the instrument panel 2.
At the time of attachment to the components 1 and 13, the sponge 24 of the insertion ends 18, 20, and 22 and the ventilator grill insertion openings 19, 21, and There is a problem that some gaps are formed between the sponges 23 and that some air leakage from the sponge 24 cannot be avoided. In addition, it takes time and effort to attach the sponge 24 to the outer periphery of the insertion ends 18, 20, and 22 of the center ventilator grill 8, the driver side ventilator grill 10, and the passenger side ventilator grill 12, and the sponge 24 requires a material cost. Therefore, there is a problem that the manufacturing cost is increased.
Furthermore, when the recycling of the parts after the scrapping is taken into consideration, the removal of the sponge 24 is troublesome, resulting in a problem in cost.

SUMMARY OF THE INVENTION An object of the present invention is to provide a duct structure of an air conditioning system for an automobile, which solves the above-mentioned problems and improves the manageability of a side defroster duct and an air conditioning duct.

[0018]

In order to solve the above problems, according to the first aspect of the present invention, a side defroster duct member having an open cross section is fixedly abutted on the lower surface of the instrument panel. Forming a side defroster duct having a closed cross section with the instrument panel, bending both ends of the side defroster duct constituent members to form a wind guide portion communicating with the side defroster grill provided on the instrument panel, A rectifying plate for controlling the flow of air blown out from the side defroster grill is provided at an inlet of the side defroster grill of the wind guide.

According to the first aspect of the present invention, the side defroster duct member has an open cross section and is fixed to the lower surface of the instrument panel so as to be closed with the instrument panel. Since the side defroster duct is formed, the space efficiency in the instrument panel is improved, and the rigidity of the instrument panel can be improved.

A straightening plate is provided at the inlet of the side defroster grill of the wind guide to control the direction of the air blown from the side defroster grill and stabilize the flow of the air. It is possible to eliminate the necessity of forming the wind running part, and it is not necessary to separate the duct position of the wind guide part from the back of the instrument panel, so that the space efficiency in the instrument panel can be further improved.

According to the second aspect of the present invention, the air conditioning duct having an open cross section is fixed to the lower surface of the instrument panel so as to abut the air conditioning duct having a closed cross section between the air conditioning duct and the instrument panel. And forming a detour that bypasses the electrical components attached to the instrument panel at the seat-side portion of the air-conditioning duct component, and at the end of the detour, a seat side with respect to the instrument panel. Surrounds the insertion end of the seat-side ventilator grill, which is directly connected so as to cover the ventilator grille mounting opening and is inserted and fixed into the ventilator grille mounting opening so as to blow air toward the seat, in a non-contact state. And a ventilator grill surrounding portion is provided.

According to the second aspect of the present invention, an air conditioning duct component having a closed cross section formed between the instrument panel and the instrument panel is provided with an instrument at an end of a detour. Since the ventilator grill surrounding portion is directly connected to the panel so as to cover the ventilator grill mounting opening on the seat side, and surrounds the insertion end of the seat side ventilator grill in a non-contact state, the instrument panel and There is no gap between the air-conditioning duct component and the end of the air-conditioning duct component, so that air leakage from the gap can be eliminated. Further, since the insertion end of the seat-side ventilator grill is free, a sponge for connecting to the air conditioning duct component can be eliminated. Since there is no need to attach a sponge to the outer periphery of the insertion end of the seat side ventilator grille, it is possible to reduce the manufacturing cost. Further, also in the case of recycling the parts after the scrapping, there is no need to remove the sponge, so that the seat side ventilator grill can be easily recycled.

Further, since the insertion end of the ventilator grille on the seat side is free, air can enter from all directions of the outer periphery of the insertion end, so that a large flow passage area can be obtained.
Therefore, the ventilator grill enclosing portion can be made smaller than the conventional front folded portion. This allows
This facilitates a layout that avoids interference with the passenger side airbag unit and the meter.

Further, since the ventilator grill enclosing portion has a simple shape, the pressure loss is smaller than that of the conventional folded front portion having a complicated shape, so that the wind can smoothly pass through.

[0025]

First Embodiment A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 to FIG. 5 show a first embodiment of the present invention. Note that the same or equivalent parts as those in the conventional example of FIGS. 9 to 11 are denoted by the same reference numerals and described.

First, the structure will be described. In the first embodiment, a side defroster duct member 30 having an open section having a substantially U-shape (or upward U-shape) is provided. By fixing the component member 30 to the lower surface side of the instrument panel 2, a side defroster duct having a closed cross section is formed between the instrument panel 2 and the instrument panel 2. In addition,
The side defroster duct component 30 is fixed to the instrument panel 2 using an adhesive or the like.
Alternatively, it may be fixed by using a heat welding agent such as hot melt. Alternatively, it may be fixed by vibration welding or hot plate heating welding. Alternatively, the side defroster duct component 3
Alternatively, a flange may be formed at 0 and the flange portion may be fixed by screwing.

Then, the wind guide portion 31 communicating with the side defroster grill 4 is formed by bending both end portions of the side defroster duct component 30. At this time, the cross section of the flow passage of the wind guide portion 31 is set to be substantially equal to other portions of the side defroster duct component 30. Then, a rectifying plate 32 for controlling the flow of wind is integrally provided in advance at the entrance of the side defroster grill 4 of the wind guide portion 31.

As shown in FIGS. 2 and 3, the wind guide portion 31 and its peripheral portion are provided with a duct outer member 33 having an L-shaped cross section.
And a duct inner member 34 having an I-shaped cross section, and formed so that they can be assembled by fitting and welding the mating portions 35 of the two. May be integrally formed on the side. Alternatively, the wind guide section 31 and its peripheral portion
As shown in FIGS. 4 and 5, the duct outer member 3 having an I-shaped section
6 and a duct inner member 37 having an L-shaped cross section. 37 may be formed integrally.

Next, the operation of the first embodiment will be described.
This will be described with reference to FIGS.

Air from an air conditioning unit (not shown) enters the side defroster duct member 30 from the air inlet, passes through the side defroster duct member 30 and the wind guides 31 at both ends, and is formed on the instrument panel 2. The side defroster grill 4 blows out toward a front door window (not shown) to prevent the front door window from being clouded.

At this time, a rectifying plate 32 integrally provided in advance at the entrance of the side defroster grill 4 of the wind guide portion 31 controls the direction of the wind blown from the side defroster grill 4 and stabilizes the flow of the wind.

As described above, according to the first embodiment, the side defroster duct constituting member 30 has a substantially U-shaped cross section, and is fixed to the lower surface of the instrument panel 2 so as to be in contact with the instrument panel 2. Since the side defroster duct having a closed cross section is formed between the instrument panel 2 and the space, the space efficiency in the instrument panel 2 is improved, and the rigidity of the instrument panel 2 can be improved.

In addition, a rectifying plate 32 is provided at the entrance of the side defroster grill 4 of the wind guide section 31 to control the direction of the wind blown from the side defroster grill 4 and stabilize the flow of the wind. It is possible to eliminate the need to form a long wind run-in portion as in the above. In addition, since the flow of the wind is controlled by the rectifying plate 32, it is not necessary to separate the duct position of the wind guide portion 31 from the back surface of the instrument panel, so that the space efficiency in the instrument panel 2 is further improved. be able to.

Further, as shown in FIGS. 2 and 3, the wind guide portion 31 and its peripheral portion are divided into an L-shaped cross section duct outer member 33 and an I-shaped cross section duct inner member 34. Of the rectifying plate 32
Are integrally formed on the side of the duct inner member 34 having the I-shaped cross section, so that the wind guide portion 31 provided with the current plate 32
Can be easily manufactured. Similarly, the wind guide 31
As shown in FIGS. 4 and 5, the peripheral portion thereof is divided into a duct outer member 36 having an I-shaped cross section and a duct inner member 37 having an L-shaped cross section. The wind guide portion 31 having the rectifying plate 32 can be easily manufactured by forming the rectifying plate 32 so as to be assembled by welding or the like and integrally forming the rectifying plate 32 on the side of the duct inner member 37 having the L-shaped cross section. It becomes possible.

[0036]

Second Embodiment FIGS. 6 to 8 show a second embodiment of the present invention. Note that FIGS.
The same or equivalent parts as those of the prior art will be described with the same reference numerals.

First, the structure will be described. In the second embodiment, the portion of the air-conditioning duct component 6 on the driver's seat side is a front detour portion 26 that detours forward to avoid the meter display portion 25. The portion of the air conditioning duct component 6 on the passenger seat side is a rear detour portion 27 that detours backward to avoid the passenger seat side airbag unit 15 and has a substantially U-shape (or upward U-shape). When the air-conditioning duct component 6 having an open section is fixed to the lower surface of the instrument panel 2 to form an air-conditioning duct having a closed section with the instrument panel 2, the front detour portion 26 and the rear detour portion are formed. 27 is directly connected to the instrument panel 2 so as to cover the ventilator grille mounting opening 11 on the driver's seat side, and the driver's side ventilator tag. Providing a ventilator grill enclosure 39 that surrounds the insertion end 20 Le 10 in a non-contact state. Further, there is provided a ventilator grill surrounding portion 40 which is directly connected to cover the ventilator grill mounting opening 13 on the passenger seat side and surrounds the insertion end 22 of the ventilator grill 12 on the passenger seat side in a non-contact state.

At this time, since the grill surrounding portions 39 and 40 of the air conditioning duct constituting member 6 can form an air conditioning duct having a closed cross section by using a corner portion between the upper surface 14 and the rear surface 7 of the instrument panel 2. It has an L-shaped cross section similarly to the front detour portion 26 and the rear detour portion 27. The ventilator grille surrounding portions 39 and 40 of the air conditioning duct component 6 are connected to the front detour portion 26 and the rear detour portion 27.
As compared with the above, the height dimension may be substantially the same and the dimension in the front-rear direction may be longer, or other dimensions may be used.

The sponge 2 as in the prior art is provided on the outer periphery of the insertion end 20 of the ventilator grille 10 on the driver's seat side and on the outer periphery of the insertion end 22 of the ventilator grille 12 on the passenger's side.
4 does not need to be attached.

Next, the operation of the second embodiment will be described.
This will be described with reference to FIGS.

The air from the air conditioning unit 17 enters the air conditioning duct component 6 from the air intake, passes through the air conditioning duct component 6, and partially blows out from the outlet of the center ventilator grill 8 into the vehicle interior. . Further, a part of the air passes through the front detour portion 26 and the ventilator grille surrounding portion 39 and is blown out from the outlet of the driver's seat side ventilator grille 10 into the vehicle interior. Further, a part of the air passes through the rear detour portion 27 and the ventilator grill enclosing portion 40 and is blown out from the outlet of the front passenger side ventilator grill 12 into the vehicle interior. Thereby, the temperature in the vehicle compartment is adjusted.

As described above, according to the second embodiment, the front detour portion 26 and the rear detour portion 27 in the air-conditioning duct component 6 that forms a closed-section air-conditioning duct with the instrument panel 2. Is connected directly to the instrument panel 2 so as to cover the ventilator grille mounting opening 11 on the driver's seat side and the ventilator grille mounting opening 13 on the passenger's seat side. Since the ventilator grill surrounding portions 39 and 40 that surround the insertion end 20 and the insertion end 22 of the front passenger side ventilator grill 12 in a non-contact state are provided, the instrument panel 2 and the end of the air conditioning duct component 6 are connected. There is no gap between them, so that air leakage from the gap can be eliminated. Further, the insertion ends 20 of the ventilator grills 10 and 12 on the driver's seat side and the passenger's seat side,
Since 22 is free, a sponge for connecting to the air conditioning duct component 6 can be dispensed with. Since there is no need to attach sponges to the outer peripheries of the insertion ends 20, 22 of the ventilator grills 10, 12 on the driver's seat side and the passenger's seat side, it is possible to reduce the manufacturing cost. Furthermore, when the parts are recycled after the scrapping, there is no need to remove the sponge, so that the ventilator grills 10 and 12 on the driver side and the passenger side can be easily recycled.

Furthermore, since the insertion ends 20 and 22 of the ventilator grills 10 and 12 on the driver's seat side and the passenger's side are free, wind can enter from all directions around the insertion ends 20 and 22. Accordingly, the flow path area can be made large, so that the ventilator grille surrounding portions 39 and 40 can be made smaller than the conventional front folded portion. This facilitates a layout in which the front or rear detours 26 and 27 avoid interference with electrical components such as the meter display unit 25 and the passenger side airbag unit 15.

Further, the ventilator grill surrounding portions 39, 4
Since 0 has a simple shape, the pressure loss is smaller than that of the conventional folded front portion having a complicated shape, and the wind can smoothly pass through.

[0045]

As described above, according to the first aspect of the present invention, the side defroster duct member has an open cross section and is fixed to the lower surface of the instrument panel so as to be in contact with the instrument panel. Since the side defroster duct having the closed cross section is formed between them, the space efficiency in the instrument panel is improved, and the rigidity of the instrument panel can be improved.

Also, a flow straightening plate is provided at the inlet of the side defroster grill of the wind guide to control the direction of the wind blown from the side defroster grill and stabilize the flow of the wind. This eliminates the need to form a wind run-up section. In addition, since the flow of the wind is controlled by the rectifying plate, it is not necessary to separate the duct position of the wind guide from the back of the instrument panel, so that the space efficiency in the instrument panel can be further improved. .

According to the second aspect of the present invention, an air conditioning duct component having an air conditioning duct having a closed cross section formed between the instrument panel and the instrument panel is provided at the end of the detour portion with respect to the instrument panel. The ventilator grille surrounding portion is directly connected to cover the ventilator grille mounting opening on the seat side, and surrounds the insertion end of the seat side ventilator grille in a non-contact state. There is no gap between the end of the member and the air leakage from the gap can be eliminated. Further, since the insertion end of the seat-side ventilator grill is free, a sponge for connecting to the air conditioning duct component can be eliminated. Since there is no need to attach a sponge to the outer periphery of the insertion end of the seat side ventilator grille, it is possible to reduce the manufacturing cost. Further, also in the case of recycling the parts after the scrapping, there is no need to remove the sponge, so that the seat side ventilator grill can be easily recycled.

Further, since the insertion end of the ventilator grille on the seat side is free, air can enter from all directions of the outer periphery of the insertion end, so that a large flow passage area can be obtained.
Therefore, the ventilator grill enclosing portion can be made smaller than the conventional front folded portion. This allows
This facilitates the layout of the detour section so as to avoid interference with electric components such as the passenger side airbag unit or the meter.

Further, since the ventilator grill enclosing portion has a simple shape, the pressure loss is smaller than that of the conventional folded front portion having a complicated shape, and the ventilating grill can be smoothly ventilated. It can be effective.

[Brief description of the drawings]

FIG. 1 is a side sectional view of Embodiment 1 of the present invention.

FIG. 2 is an exploded perspective view of a wind guide unit of FIG.

FIG. 3 is an assembled front view of FIG. 2;

FIG. 4 is an exploded perspective view of another example of the wind guide section of FIG.

FIG. 5 is an assembled front view of FIG. 4;

FIG. 6 is an exploded perspective sectional view of Embodiment 2 of the present invention.

FIG. 7 is a partial plan view of FIG. 6;

FIG. 8 is a sectional view taken along the line AA of FIG. 6;

FIG. 9 is a perspective view of a conventional example.

FIG. 10 is a plan view of FIG. 9;

11 is a view taken in the direction of arrows BB in FIG. 10;

FIG. 12 is an exploded perspective view of another conventional example.

FIG. 13 is a partial plan view of FIG.

14 is a sectional view taken along the line CC in FIG.

FIG. 15 is a sectional view taken along the line DD in FIG. 12;

FIG. 16 is a sectional view taken along the line EE in FIG. 12;

[Explanation of symbols]

2 Instrument Panel 4 Side Defroster Grill 6 Air-Conditioning Duct Component 10 Driver-Side Ventilator Grill (Seat-Side Ventilator Grill) 12 Passenger-Side Ventilator Grill (Seat-Side Ventilator Grill) 13 Ventilator Grill Mounting Opening 20 Plug-In End 22 Plug-In End 26 Front detour part (detour part) 27 Rear detour part (detour part) 30 Side defroster duct constituent member 31 Wind guide part 32 Rectifier plate 39 Ventilator grill enclosure 40 Ventilator grill enclosure

Claims (2)

[Claims] 1. A side defroster duct having a closed cross section is formed between an instrument panel and an instrument panel by fixing a side defroster duct component having an open cross section to the lower surface side of the instrument panel. Bending both ends of the member to form a wind guide portion communicating with the side defroster grill provided on the instrument panel, and at a side defroster grill entrance portion of the wind guide portion, a flow of wind blown out from the side defroster grill is formed. A duct part structure for an automobile air conditioner, comprising a rectifying plate for control. 2. An air conditioning duct component having an open cross section is fixed to the lower surface side of the instrument panel to form an air conditioning duct with a closed cross section between the instrument panel and the air conditioning duct component. A detour portion is formed around the seat side to bypass the electrical components mounted in the instrument panel, and the end of the detour portion is directly connected to the instrument panel so as to cover the ventilator grill mounting opening on the seat side with respect to the instrument panel. A ventilator grill enclosing portion that is connected and inserted into and fixed to the ventilator grille mounting opening so as to blow out the wind toward the seat so as to surround the insertion end of the seat side ventilator grill in a non-contact state. Characteristic duct structure of automotive air conditioning equipment.