JP3741082B2 - Defroster nozzle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a defroster nozzle that blows air onto the inner surface of a windshield of a vehicle to remove fogging, and more particularly to a defroster nozzle that substantially uniforms the direction and amount of air discharged from an air outlet.
[0002]
[Prior art]
In general, this type of defroster nozzle is installed between the air conditioning unit and the opening on the top surface of the instrument panel, and is composed of a flat cylindrical body whose lateral width extends in a fan shape from the air conditioning unit toward the opening. .
The air from the air conditioning unit is blown out from the opening of the instrument panel toward the inner surface of the windshield at a wide angle.
In order to blow out at this wide angle, conventionally, as shown in FIG. 7, a plurality of wind direction air volume adjustment ribs (B), (D), and wind direction adjustment ribs (A), (C) are provided inside the cylinder. (E) is provided to guide the air from the air conditioning unit 60 to adjust the blowing direction and the blowing amount.
[0003]
However, in the defroster nozzle 1 provided with such wind direction air volume adjusting ribs (b) and (d) and the wind direction adjusting ribs (a), (c) and (e), the defroster nozzle 1 is designed. Wind direction air volume adjustment ribs (b), (d), and wind direction adjustment ribs (a), (c), (e), subtle changes in the angle of the wind direction air volume adjustment ribs (b), (d), In addition, the wind direction adjusting ribs (A), (C), and (E) become a barrier and a portion where no wind occurs is generated, and there is a problem that it takes a lot of time to set this angle.
Also, wind direction air volume adjustment ribs (b) and (d) and wind direction adjustment ribs (a), (c) and (e) at the air outlet 1100 of the defroster nozzle 1 and an opening 71 of the instrument panel 70 are provided. However, there is a problem that a windless part is generated when these are generated due to variation in assembly.
[0004]
That is, as shown in FIG. 8A, for example, the air is divided into right and left depending on the angle of the wind direction adjusting rib (e), but the air flow is peeled off from the upper surface of the wind direction adjusting rib (e), and the air flow. There will be no windless parts.
Further, as shown in FIG. 8 (B) (C), in relation to the bridging rib 72 provided in the opening 71 of the wind direction adjustment rib (iii) and the instrument panel 70, as shown in FIG. 8 (B) When the bridging rib 72 and the upper end of the airflow direction adjusting rib (c) are aligned, the air flow along the airflow direction adjusting rib (c) is along the airflow and almost no wind is not generated.
However, as shown in FIG. 8C, when the bridging rib 72 and the upper end of the wind direction adjusting rib (c) are displaced in the left-right direction, for example, the bridging rib 72 is moved from the upper end of the wind direction adjusting rib (c) as shown in the figure. In the case of deviation to the left side, the air flow on the left side bends to the left side and is separated from the air flow on the right side, so that a windless portion is generated at the upper part of the bridging rib 72.
When the windless portion is generated, the windshield 80 is left behind without being fogged. For this reason, high assembly accuracy between the instrument panel 70 and the defroster nozzle 1 is required. However, since the instrument panel 70 is attached to the body and the defroster nozzle 1 is attached to the air conditioning unit 60, it is difficult to increase this accuracy. It was.
[0005]
On the other hand, a defroster nozzle is proposed in which air blown from the defroster nozzle is sent not only to the windshield but also to the side defrosters for the left and right door glasses (Japanese Patent Laid-Open No. 2000-318441). As shown in FIG. 9 (publication FIG. 3), the defroster nozzle has an intermediate portion between the air inlet 1000 and the air outlet 1100, and an inverted triangle in front view as shown in FIG. The air passage cross-sectional area is narrowed as a convex rib 4B with the lower end apex 42 facing the air intake port 1000. The portion where the cross-sectional area of the air passage is reduced functions as a guide for diverting and guiding a part of the air flow in the defroster nozzle to the left and right branch passages 3b and 3c. It does not control the direction and the amount of blowout.
[0006]
[Problems to be solved by the invention]
The present invention has been made to solve such a problem, and a defroster nozzle that does not generate a portion where no wind occurs, can easily finely adjust the blowing direction and the blowing amount, and does not need to take into account the effects of assembly variations. The purpose is to provide.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a defroster nozzle that connects an air conditioning unit installed below an instrument panel and a horizontally elongated opening formed in the instrument panel, through which the front windshield of the vehicle is connected. A defroster nozzle that blows air toward the inner surface, and a cylinder that expands in a fan shape from an air inlet at a lower end connected to the air conditioning unit to an air outlet at an upper end connected to the opening of the instrument panel In the cylindrical defroster nozzle, at the intermediate position in the width direction before the air outlet, a passage cross-sectional area is partially reduced, and a throttle portion that disperses part of the air from the air inlet in the left-right direction is formed It is characterized by. Therefore, the air is throttled at the throttle part in which the passage cross-sectional area in front of the air outlet is partially reduced, and a part of the air is dispersed in the left-right direction, so the air blowing amount at the air outlet becomes substantially uniform, The fogging of the windshield can be removed over substantially the entire surface within a predetermined time.
[0008]
Moreover, the defroster nozzle according to claim 2 according to the present invention is characterized in that the throttle portion is formed in a triangular pyramid shape or a quadrangular pyramid shape bulging inward on the front side or the rear side of the defroster nozzle. To do.
Therefore, since the air flow in the passage is guided to the air outlet without being disturbed, the air flow blown to the inner surface of the windshield can easily follow the windshield.
[0009]
The defroster nozzle according to claim 3 of the present invention is characterized in that the inclined surface of the throttle portion is formed in a step shape and the overall height of the throttle portion is lowered.
Therefore, since the inclination angle can be set large by the step-like cross section, without increasing the overall height of the throttle portion, that is, without greatly reducing the amount of air blown at the center of the defroster nozzle, The degree of dispersion can be increased.
[0010]
According to a fourth aspect of the present invention, the defroster nozzle according to the fourth aspect of the present invention is characterized in that the upper part of the defroster nozzle is curved backward in a vertical cross section, and the throttle part is formed so as to hang on the curved part. .
Therefore, after the air from the air inlet is throttled in the required direction and amount by the throttle part, it is accelerated by the curved part and blown out from the air outlet, so the air dispersed in the left and right direction is evenly distributed from the air outlet There is no need to provide a guide rib or the like in the vicinity of the air outlet.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a defroster nozzle according to the present invention will be described below with reference to the drawings.
Here, FIG. 1 is a rear view of the defroster nozzle with the rear plate omitted, and FIG. 2 is a longitudinal sectional view of the defroster nozzle.
[0012]
(Constitution)
The configuration of the defroster nozzle will be described. As shown in FIGS. 1 to 3, the defroster nozzle 10 according to the first embodiment of the present invention connects the lower air inlet 100 to the connecting port 61 of the air conditioning unit 60 and the upper air outlet 110. A front plate 11 and a rear plate, which are made of a synthetic resin and connected to the upper surface opening 71 of the instrument panel 70 and have a fan-shaped width extending from the lower air inlet 100 toward the upper air outlet 110 in a fan shape. 12 is formed into a flat shape.
In the longitudinal section, as shown in FIG. 2, the air is gradually inclined forward from the rear lower air intake 100, and is tapered and bent rearward in a curved shape at the curved portion 13. A flange 111 is brought into contact with and connected to the upper surface opening 71 of the instrument panel 70 at the air outlet 110.
[0013]
In the substantially central portion of the fan-shaped inverted triangle of the front plate 11, a throttle portion 20 that partially reduces the cross-sectional area of the air passage 14 formed by the front plate 11 and the rear plate 12 hangs on the curved portion 13. Is formed.
The narrowed portion 20 is formed with inclined surfaces 21, 21 that extend from the front plate 11 toward the rear plate 12 in the center from the ridge line 22 that passes in the vertical direction. It has a shape with a quadrangular pyramid.
The shape of the throttle portion 20 is determined so as to uniformly control the amount of air blown from the air outlet 110 through the air passage 14. For example, as shown in the cross section of FIG. 3, when the ridge line 22 of the narrowed portion 20 is one in the center and tilts to the left and right from there, a part of the air is uniformly distributed to the left and right where the air volume tends to be insufficient. It becomes.
[0014]
When it is desired to further increase the dispersion of air, it is necessary to increase the inclination angle of the inclined surface 21, but the distance between the front plate 11 and the rear plate 12 is narrow, so that it cannot be a steep angle. Moreover, if the inclination angle of the inclined surface 21 is increased, the air volume at the center of the outlet 110 will be insufficient. Therefore, as shown in the sectional view of FIG. 4 which is the second embodiment of the present invention, when the inclined surface 21 is formed in the stepped shape 211, the air direction is changed without reducing the air volume at the center of the outlet 110. be able to.
[0015]
Alternatively, when the air volume at the center of the outlet 110 is required to some extent, as shown in FIGS. 5 (A) and 5 (B), which is the third embodiment of the present invention, the top of the throttle portion 20 is a plane. That is, it forms so that the ridgeline 22 which passes up and down may become two, and the inclined surfaces 21 and 21 which spread from these two ridgelines 22 to the left and right and up and down, respectively are formed.
According to this third embodiment, it is possible to adjust the air volume and the air direction to the left and right while securing the air volume at the center of the outlet 110 to some extent.
[0016]
(Function)
Next, the operation of the defroster nozzle configured as described above will be described. When the air conditioning unit 60 is operated, air is sent from the connection port 61, flows upward from the air intake 100 through the air passage 14, and the fan-shaped central portion is squeezed by the squeezing part 20 and dispersed in the left-right direction. It blows out from the air blower outlet 110 and the upper surface opening 71 of the instrument panel 70 to which the air blower outlet 110 is connected and comes into contact with the inner surface of the windshield 80 to remove the fog on the windshield 80.
FIG. 6 shows the fogging removal state of the windshield 80 in comparison with the conventional one, and FIG. 6 (A) is provided with the throttle unit 20 of the third embodiment shown in FIG. This is based on the defroster nozzle 10, and FIG. 6B is based on a fan-shaped cylindrical defroster nozzle that is not provided with a throttle portion or a wind direction adjusting rib.
[0017]
Comparing both, the defroster nozzle 10 provided with the throttle portion 20 in FIG. 6A produced a slightly cloudy residue in the j portion hatched at the lower left and right corners of the windshield 80. It can be seen that the other parts have been removed.
On the other hand, FIG. 6 (B) with the defroster nozzle 1 provided with nothing is the k portion where the air is supplied to the central portion of the windshield 80 and the amount of airflow to the left and right is small, so that the hatching is applied from the left and right top to bottom. It is clear that there is a large cloudy residue.
[0018]
According to the defroster nozzle 10 configured as described above, since the air passage cross-sectional area is partially reduced by the throttle portion 20, a part of the air taken in from the air intake 100 is dispersed in the left-right direction. Thus, the air blower 110 comes into contact with the windshield 80 through the upper surface opening 71 of the instrument panel 70, and the fog of the windshield 80 can be widely removed.
[0019]
In addition, this invention is not limited to the thing of the said embodiment, A various change is possible in the range which does not deviate from the meaning.
For example, in the above-described embodiment, the throttle part is provided on the front plate and the throttle part protrudes in the direction of the rear plate. However, the present invention is not limited thereto, and the throttle part is provided on the rear plate. It is also possible to reduce the cross section of the passage by projecting to the front plate side.
Further, although the diaphragm portion is shown as a quadrangular pyramid, it may be a triangular pyramid.
[0020]
【The invention's effect】
The present invention relates to a defroster nozzle that connects an air conditioning unit installed below an instrument panel and a horizontally elongated opening formed in the instrument panel, and blows air from the opening toward the inner surface of a vehicle windshield. A cylindrical defroster nozzle having a fan-shaped width extending from an air inlet at a lower end connected to the air conditioning unit to an air outlet at an upper end connected to the opening of the instrument panel. Since the passage cross-sectional area is partially reduced at the intermediate position in the width direction on the front side and a throttle part that disperses part of the air from the air intake port in the left-right direction is formed, the amount of air blown out at the air blow-out port is substantially reduced. To provide a defroster nozzle that becomes uniform and can remove the fogging of the windshield over almost the entire surface within a predetermined time. It has become possible.
[Brief description of the drawings]
FIG. 1 is a rear view of a defroster nozzle without a rear plate according to a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view taken along the line II-II of FIG. 1 of the defroster nozzle according to the first embodiment of the present invention.
3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is a cross-sectional view corresponding to FIG. 3 of a defroster nozzle according to a second embodiment of the present invention.
5A is a rear view of a defroster nozzle according to a third embodiment of the present invention, with a rear plate omitted, and FIG. 5B is a cross-sectional view taken along line VB-VB in FIG. is there.
FIGS. 6A and 6B are diagrams showing a state of removing windshield fogging by a defroster nozzle, wherein FIG. 6A is a defroster nozzle according to a third embodiment of the present invention, and FIG. 6B is a conventional defroster nozzle. Show things.
FIG. 7 is a rear view in which a rear plate of a conventional defroster nozzle is omitted.
FIGS. 8A and 8B are enlarged cross-sectional views showing the flow of air by a conventional defroster nozzle, in which FIG. 8A shows the occurrence of a windless portion due to a wind direction adjusting rib, and FIG. 8B is a bridge provided at the upper opening of the instrument panel; The case where the relationship between the rib and the wind direction adjusting rib is normal is shown, and (C) shows the case where the bridging rib and the wind direction adjusting rib are displaced.
9A and 9B show a conventional defroster nozzle provided with convex ribs, where FIG. 9A is a longitudinal sectional view in the width direction, and FIG. 9B is a longitudinal sectional view in the front-rear direction.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Defroster nozzle 100 Air intake port 110 Air outlet 11 Front plate 12 Rear plate 13 Bending part 20 Restriction part 22 Ridge line 60 Air conditioning unit 70 Instrument panel 80 Windshield

Claims (4)

A defroster nozzle that connects an air conditioning unit installed below the instrument panel and a horizontally elongated opening formed in the instrument panel and blows air from the opening toward the inner surface of the windshield of the vehicle, In the cylindrical defroster nozzle whose width expands in a fan shape toward the air outlet at the upper end connected to the opening of the instrument panel from the air inlet at the lower end connected to the air conditioning unit,
At the middle position in the width direction before the air outlet, the one side of the fan-shaped cylindrical shape is inclined so as to gradually protrude upward from below toward the other side, and passes in the vertical direction. An inclined surface extending left and right from the ridge line of 1 or 2 is formed, the passage cross-sectional area is partially reduced, and a throttle portion that disperses part of the air from the air intake port in the left-right direction is formed. Defroster nozzle. The defroster nozzle according to claim 1,
The defroster nozzle, wherein the throttle portion is formed in a triangular pyramid or a quadrangular pyramid shape that bulges inward on the front side or the rear side of the defroster nozzle. The defroster nozzle according to claim 2,
The defroster nozzle according to claim 1, wherein the throttle portion has an inclined surface formed in a stepped shape and has a low overall height. The defroster nozzle according to any one of claims 1 to 3,
In the longitudinal section, the upper part is curved backwards like a letter,
The defroster nozzle, wherein the throttle portion is formed so as to hang over the curved portion.

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