JPH11129744A - Defroster duct structure for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently defrost a windshield glass at a center part in the automobile width direction even when a main duct is provided with a pair of right and left air supply nozzles to be opened toward the windshield glass on its extension end side. SOLUTION: A pair of right and left air supply nozzles 23 to be opened toward a windshield glass 10 are formed on an extension end side of a main duct 22. A side duct 28 one end part which is connected to the air supply nozzles 23 and the other end part of which is extended toward a side window glass, is provided. A side plate 35 to constitute inner parts 33 opposite to each other in the automobile width direction of the air supply nozzle 23, is inclined so as to be gradually separated upward in the automobile width direction from the perpendicular 39 passing a branch point 38 of the inner parts 33. An air outlet 42 is formed in the side plate 35. The internal space of the main duct 22 is communicated with one end part 29 of the side duct 28 through the air outlet 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a windshield provided on a vehicle body and a heater unit for blowing air onto the inner surfaces of the respective side glasses so as to prevent the inner surfaces of the respective windshields from being fogged by water vapor. The present invention relates to an automobile defroster duct structure for guiding.

[0002]

2. Description of the Related Art Conventionally, a defroster duct structure of an air conditioner mounted on an automobile has been disclosed in Japanese Utility Model Application Laid-open No. 63-35657.
There is the one shown in Japanese Patent Publication No.

According to this, the defroster duct is provided at a front end portion of the vehicle compartment, and an instrument panel for covering the defroster duct from the vehicle compartment side is provided. The defroster duct includes a main duct that extends upward from the heater unit side and has a bifurcated bifurcated left and right end, and each branch portion of the main duct extends in the vehicle width direction as it goes upward. The blowout nozzle has an increased width and an upper end opening toward the front window glass. Further, a side duct is provided, one end of which is connected to the blowing nozzle, and the other end of which extends toward the side window glass.

When air is discharged from the heater unit by driving the heater unit, the air is blown out toward the front windshield through each blowout nozzle of the main duct, and is also blown toward the front window glass. , And is blown out toward the side window glass, so that the inner surfaces of the respective glass, which are surfaces on the vehicle interior side, are prevented from fogging.

As described above, the reason why the extended end side of the main duct is bifurcated to the left and right to form a pair of left and right blow nozzles is that a space is created between these two blow nozzles. Thus, the instrument panel is fastened to the vehicle body at the front end of the passenger compartment through this space.

On the other hand, the lower portions of the side plates constituting the inner portions of the blow nozzles which face each other in the vehicle width direction are substantially horizontal, but the upper portions of the respective side plates gradually approach each other as they move upward. It is inclined as follows.

For this reason, a part of the air flowing from the heater unit side to the blow-out nozzles in the main duct flows along the inner side of the blow-out nozzle and flows from the inner side of the blow-out nozzle. It is blown out toward the center of the front window glass in the vehicle width direction. Therefore, as described above, although the blowing nozzles are paired on the left and right, due to the air blown toward the center of the front windshield,
The central part is prevented from fogging.

[0008]

However, even with the above-mentioned conventional technique, there is a possibility that the fogging of the center portion of the front window glass may not always be sufficiently prevented for the following reasons.

That is, of the air flowing from the heater unit side of the main duct to the lower part of the side plate inside each of the blow nozzles, the air toward the blow nozzle is firstly separated from the horizontal side plate. After colliding with the lower surface of the side plate and flowing outward, it flows upward while largely curving along the inner surface of the upper portion of the inclined side plate.

[0010] For this reason, a large amount of vortex is likely to be generated near the inner surface of the upper portion of the side plate in the inner portion of the blowing nozzle due to the large curvature as described above. Tends to peel off greatly from the inner surface of the substrate.

Therefore, of the air blown from the blow nozzle toward the windshield, the amount of air blown from the inner portion of the blow nozzle tends to be insufficient, and accordingly, the wind of the windshield is reduced. The antifogging in the central portion may be insufficient, so that there is a possibility that a so-called sunny spot may occur.

The present invention has been made in view of the above-described circumstances. Even when the main duct has a pair of left and right blow-out nozzles that open toward the front window glass at the extending end thereof, It is an object of the present invention to prevent fogging at a central portion of the windshield in the vehicle width direction more sufficiently.

[0013]

A vehicle defroster duct structure according to the present invention for solving the above-mentioned problems extends upward from the heater unit 18 side and its extended end side bifurcates right and left. A main duct 22 is provided, and each branch portion of the main duct 22 is formed as a blow-out nozzle 23 whose inner width in the vehicle width direction increases as it goes upward and whose upper end opens toward the front window glass 10. Is connected to the blowing nozzle 23 and the other end 31 is provided with a side duct 28 extending toward the side window glass 12.

The side plates 35 constituting the inner portions 33 of the blow-out nozzles 23 facing each other in the vehicle width direction are moved upward from a perpendicular 39 passing through a branch point 38 of the inner portions 33, 33 in the vehicle width direction. An air outlet 42 is formed in the inclined side plate 35, and the internal space of the main duct 22 communicates with one end 29 of the side duct 28 through the air outlet 42. is there.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment)

1 to 3 show a first embodiment.

In FIG. 1, reference numeral 1 denotes the body of an automobile, and an arrow Fr indicates the front thereof. The left and right described below refer to the vehicle width direction toward the front (the direction toward FIGS. 1 and 2).

The interior of the vehicle body 1 is a vehicle compartment 2, and an instrument panel 4 is provided along the front end of the vehicle compartment 2 and extends in the vehicle width direction.
Is fastened to the vehicle body 1 by a plurality of fasteners 5 in the vehicle width direction and supported.

A front window 9 is provided at the front end of the vehicle cabin 2 with the center 8 of the vehicle body in the vehicle width direction as the center in the vehicle width direction. The front window 9 has a front window glass 10. Side doors 11 are provided on each of the left and right sides of the vehicle body 1 so as to be connected to the rear of each of the left and right side ends of the front window 9. The side doors 11 have side window glasses 12 on their upper parts. doing.

An air conditioner 14 mounted on an automobile is provided at a front portion of the cabin 2. Hereinafter, the air conditioner 14 will be described.

On the upper surface of the instrument panel 4, a pair of left and right central outlets 15 are formed so as to be distributed to the left and right with respect to the center 8 of the vehicle body. 10
It is open toward the lower inner surface. Side outlets 16 are formed on the left and right sides of the upper surface of the instrument panel 4, respectively.
6 is open toward the lower inner surface of each side window glass 12.

A heater unit 18 provided with a fan and the like is provided below the front end of the compartment 2. A resin-made defroster duct 21 for guiding the air 19 discharged from the heater unit 18 to each of the central outlets 15 and the side outlets 16 is provided, and the defroster duct 21 is provided on the instrument panel 4. It is housed inside.

The defroster duct 21 has a main duct 22 extending vertically. One end (lower end) of the main duct 22 communicates with the discharge port of the heater unit 18, and the other end (upper end) extends upward from the heater unit 18 side and has an extended end. The side is bifurcated to the left and right.

Each of the left and right branches on the extension end side of the main duct 22 has an inner width dimension in the vehicle width direction increasing upward and an inner width dimension in the front-rear direction decreasing as viewed upward. And a fan-shaped blowing nozzle 23. The upper end of each of the blowing nozzles 23 is fastened to the instrument panel 4 by a fastener, and the opening at the upper end of each of the blowing nozzles 23 is directed toward the lower inner surface of the front window glass 10 through the central outlet 15. It is open.

A space 25 is provided between the left and right outlet nozzles 23 in the vehicle width direction. This space 2
Reference numeral 5 denotes an arrangement space for the fastener 5 for fastening the central portion of the instrument panel 4 in the vehicle width direction to the vehicle body 1 by the fastener 5.

The defroster duct 21 has a pair of left and right side ducts 28,28. Each of the side ducts 28 is integrally formed of a single pipe material extending in the vehicle width direction, and one end 29 of the side duct 28 at the vehicle body center 8 side is connected to each of the blowing nozzles 23. Further, the other end portions 31 which are the outer portions in the vehicle width direction of the respective side ducts 28 extend toward the corresponding side window glass 12 and correspond to the other end portions 3 of the side ducts 28.
The opening 1 is opened toward the lower inner surface of the side window glass 12 through the side outlets 16.

Of the outer portions 33 and 34 of the blow-out nozzles 23 in the vehicle width direction, the inner portions 33 are opposed to each other in the vehicle width direction with the vehicle body center 8 interposed therebetween. The lower portion 35a of each side plate 35 is inclined so as to gradually move away from a vertical line 39 passing through a branch point 38 of the inside portions 33, 33 in the vehicle width direction as going upward. The branch point 38 corresponds to a joint between the lower ends of the side plates 35, 35 and is located near the vehicle body center 8 in the vehicle width direction. On the other hand, the upper part 35b of each of the side plates 35 is inclined so as to gradually approach the perpendicular 39 in the vehicle width direction as it goes upward.

Thus, the left and right side plates 35, 35
When viewed from the front (rear view), each of the side plates 35, 3 has a substantially shell shape in which the axial center extends in the vertical direction and the tip is directed downward.
Between 5, there is a closed air chamber 4 having a substantially shell-like shape as described above.
0 is formed, and an upper portion of the air chamber 40 is communicated with one end portion 29 of each of the side ducts 28.

A plurality of (three) rectangular air outlets 42 are formed vertically in the lower portion 35a of each side plate 35 inclined as described above. These air outlets 42 connect the internal spaces of the blow-out nozzles 23 in the main duct 22 and the air chamber 40 to each other. For this reason, the internal space of each of the blowing nozzles 23 is communicated with one end portion 29 of each of the side ducts 28 through the air chamber 40.

In the above configuration, when the heater unit 18 is driven, the air 19 outside the vehicle and / or
Is heated by being sucked into the heater unit 18 and discharged from the heater unit 18.

Of the air 19 (A) discharged from the heater unit 18 and flowing upward from the side of the heater unit 18 in the main duct 22, the air 19 (A) particularly passes upward through each side of the main duct 22. The flowing air 19 (B) is blown out toward the inner surface of the front window glass 10 through each of the blowing nozzles 23, and the air 19 (B) prevents the front window glass 10 from fogging.

The air 1 flowing upward from the side of the heater unit 18 in the main duct 22 flows upward.
9 (A), a part of the air 19 (C) which has passed through the central portion of the main duct 22 in the vehicle width direction in particular passes through the air outlets 42 and the air chamber 40 in order, and the air 19 (C). It is supplied into one end 29 of the side duct 28.

Here, as described above, the lower portion 35a of each side plate 35 is inclined so as to gradually separate from the perpendicular 39 in the vehicle width direction as it goes upward, so that the lower portion 35a of each side plate 35 is formed. Each of the air outlets 42 thus opened is inclined downward. For this reason, as described above, the air 19 (C) flowing upward through the center of the main duct 22 is forced into the air chamber 40 through the air outlets 42 by the dynamic pressure. Then, a sufficient amount of air 19 (C) is supplied into the one end 29 of the side duct 28 through the air chamber 40.

Accordingly, a sufficient amount of the air 19 (D) blown toward the inner surface of the side window glass 12 through the side duct 28 is ensured. The fogging of the wind glass 12 is sufficiently performed.

In the above case, the lower portion 35a of each of the side plates 35 is not horizontal but inclined with respect to the vertical line 39 as in the above-described prior art. Of the air 19 (A) flowing upward through the center of the main duct 22, the air 19 (B) ′ that goes to each of the blow-out nozzles 23 without going to the above-mentioned air outlet 42 is the above-mentioned conventional one. The flow smoothly flows along the inner surface (lower surface) of the lower portion 35a of each of the side plates 35 without being greatly curved as in the technique of the first embodiment, whereby the vortex 43 flows near the inner surface of the lower portion 35a of each of the side plates 35.
Is suppressed.

Further, the air 19 (B) 'flowing along the inner surface of the lower portion 35a of each of the side plates 35 and the respective side plates 35
Since the air 19 (C) between the inner surface of the lower portion 35 a of the side plate 35 flows into the air chamber 40 sequentially through the air outlet 42, the air 19 (B) ′ is As a result, the vortex 43 is more reliably prevented from flowing near the inner surface of the lower portion 35a of each of the side plates 35.

Therefore, it is possible to prevent the air 19 (B) 'from being largely separated from the inner surface of the inner portion 33 of each of the blow-out nozzles 23 and to suppress the turbulent flow. ) 'Is caused to flow upward along the inner portions 33 of the respective blowing nozzles 23, so that the amount of the air 19 (B)' blown out from the respective inner portions 33 is sufficiently ensured, and as described above. The air 19 (B) 'blown out reaches farther to the extent that the turbulence is suppressed, so that the fogging at the central portion of the front window glass 10 is sufficient and the vertical It will be more uniform.

Although the above description is based on the illustrated example, the left and right side plates 35, 35 may have an inverted triangular top shape in a front view (back view). In addition, the air outlet 42 may be one or more than two, and may be circular or elliptical. Only one lower part 35a of the lower part 35a of each side plate 35 is formed. You may.

(Second Embodiment)

FIG. 4 shows a second embodiment.

According to this, the heater unit 18 is deviated to one side (right side) in the vehicle width direction with respect to the center 8 of the vehicle body. Therefore, only the lower portion 35a of the side plate 35 in the inner portion 33 of the outlet nozzle 23 on the deviated side (right side) is more greatly inclined with respect to the perpendicular 39, and the air outlet 42 is provided only in the lower portion 35a of the side plate 35. Are formed.

The other configuration and operation are the same as those of the first embodiment, and the description thereof is omitted.

(Third Embodiment)

FIG. 5 shows a third embodiment.

According to this, an extension piece 45 is provided which extends integrally downward from the joint (branch point 38) between the lower ends of the side plates 35, 35.

The flow rate of the air 19 (B) to the left and right blowing nozzles 23 can be adjusted by selecting the inclination of the extending piece 45 when viewed from the front.

The other configuration and operation are the same as those of the first embodiment, and the description thereof will be omitted.

[0049]

According to the present invention, there is provided a main duct which extends upward from the heater unit side and has a bifurcated left and right branch at its extending end, and each branch of the main duct faces upward. The inner width in the vehicle width direction increases in accordance with the above, and the upper end thereof is a blowing nozzle opening toward the front window glass, and one end is connected to the blowing nozzle and the other end extends toward the side window glass. In a car defroster duct structure with a duct,

The side plates forming the inner portions of the blow-out nozzles facing each other in the vehicle width direction are inclined so as to gradually move away from the perpendicular passing through the branch point of the inner portions in the vehicle width direction as going upward. An air outlet is formed in the inclined side plate, and the internal space of the main duct communicates with one end of the side duct through the air outlet.

For this reason, of the air discharged from the heater unit and flowing upward from the heater unit side in the main duct, particularly the air flowing upward through each side of the main duct is The air is blown toward the inner surface of the windshield through each of the blowing nozzles, and the air prevents fogging of the windshield.

Of the air flowing upward from the heater unit side of the main duct, a part of the air that has passed through the central portion of the main duct in the vehicle width direction, in particular, passes through the air outlets. Then, it is supplied into one end of each of the side ducts.

Here, as described above, the lower portion of the side plate is inclined so as to gradually move away from the perpendicular in the vehicle width direction as it goes upward, so that each air outlet formed at the lower portion of each side plate has It opens to the inclined lower side. Therefore, as described above, the air that has flowed upward through the central portion of the main duct is forced to flow into each of the air outlets by the dynamic pressure, and sufficient air flows into one end of the side duct. A quantity of air will be supplied.

Therefore, the amount of air blown toward the inner surface of the side window glass through the side duct is sufficiently ensured, and the sufficient amount of air sufficiently prevents fogging of the side window glass. .

In the above case, the lower part of each side plate is
As described above, since it is not horizontal but is gently inclined with respect to the vertical line, as described above, of the air flowing upward from the heater unit side through the center of the main duct, The air flowing toward the blow-out nozzle side without going to the air outlet flows smoothly along the inner surface of the lower part of each of the side plates without being greatly curved as in the above-described conventional technology. The generation of a vortex near the lower inner surface is suppressed.

Further, the air flowing along the inner surface of the lower part of each side plate and the air between the inner surface of the lower part of each side plate flow into the air outlet, and the former air is It flows nearer to the lower inner surface, whereby the generation of vortices near the lower inner surface of each side plate is more reliably suppressed.

Therefore, it is possible to prevent the air from being largely separated from the inner surface of the inner portion of each of the blowing nozzles.
In addition, the turbulence is suppressed, and the air is caused to flow upward along the inside of each of the blowing nozzles, so that the amount of air blown from each of the insides is sufficiently ensured. At the same time, since the turbulent flow is suppressed as described above, the blown air reaches farther, and the fogging at the center of the front window glass is sufficiently prevented.

That is, as described above, the front window glass and the side window glass are sufficiently prevented from fogging, and the main duct is provided at the extending end side.
Even when a pair of left and right blow-out nozzles that open toward the front windshield is provided, the fogging at the center of the front windshield in the vehicle width direction can be more sufficiently ensured.

[Brief description of the drawings]

FIG. 1 is a partially enlarged partial sectional view of FIG. 2 in a first embodiment.

FIG. 2 is an overall rear view of the defroster duct according to the first embodiment, as viewed from the passenger compartment side;

FIG. 3 is a partial perspective partial sectional view of a defroster duct in the first embodiment.

FIG. 4 is a diagram corresponding to FIG. 1 in a second embodiment.

FIG. 5 is a diagram corresponding to FIG. 1 in a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Cabin 4 Instrument panel 8 Body center 10 Front window glass 12 Side window glass 14 Air conditioner 18 Heater unit 19 Air 21 Defroster duct 22 Main duct 23 Blowout nozzle 28 Side duct 29 One end 31 Other end 33 Inner part 34 Outer part 35 Side plate 35a Lower part 35b Upper part 38 Branch point 39 Perpendicular line 40 Air chamber 42 Air outlet 43 Vortex 45 Extension piece

Claims (1)

[Claims] 1. A main duct which extends upward from a heater unit side and has a bifurcated bifurcated left and right end, and each branch of the main duct extends upward in the vehicle width direction. For an automobile having a blowout nozzle whose width is increased and whose upper end is opened toward the front window glass, one end of which is connected to the blowout nozzle and the other end is provided with a side duct extending toward the side window glass. In the defroster duct structure, the side plates forming the respective inner portions facing each other in the vehicle width direction of the respective blowing nozzles are inclined so as to gradually separate in the vehicle width direction from a perpendicular passing through the branch point of the both inner portions as going upward. An air outlet is formed in the inclined side plate, and the internal space of the main duct is connected to one end of the side duct through the air outlet. Automotive defroster duct structure that was.