JP2003291627A - Blast duct structure of air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the blast structure of an air conditioner for vehicles, protecting a harness from condensate. <P>SOLUTION: Since the harness 8 is wired from the bottom wall face of a harness containing section 7 by a projection section 9 spacedly, even if dew condensation occurs on the external surface of the blast duct 1, the harness 8 does not get wet due to condensate by blasting cool air to the blast duct 1 for a long time, and the harness 8 itself causes no condensation. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation duct structure for an air conditioning system for vehicles.

[0002]

2. Description of the Related Art Inside a vehicle instrument panel, a synthetic resin blower duct is provided for guiding conditioned air conditioned by an air conditioning unit to a vent outlet and a defroster outlet provided in the instrument panel. However, as this air duct, for example, Japanese Patent Laid-Open No. 11-59290,
As shown in Japanese Utility Model Publication No. 3-15209,
It is known that a harness accommodating portion is recessed along a length direction on a side wall of a blower duct, and a harness is disposed in the harness accommodating portion to improve space efficiency.

[0003]

When the cool air is blown into the air duct for a long time when the air temperature is high, the temperature difference between the air temperature and the air duct causes dew condensation on the outer surface of the air duct to wet the harness. In addition, the harness itself may be cooled via the air duct wall, and dew condensation may occur on the harness itself.

In order to prevent such poor conduction of the harness due to dew condensation water, it has been considered to protect the harness with water absorbing material, water retaining material or the like, but this measure is disadvantageous in cost.

Therefore, the present invention provides a blower duct structure for a vehicle air conditioner, which has a simple structure and can cost-effectively protect the harness from dew condensation water.

[0006]

According to the invention of claim 1, the harness accommodating portion is provided along the lengthwise direction on the side wall of the air-conditioning air duct provided inside the instrument panel. A plurality of protrusions are provided on the wall surface of the harness accommodating portion, and the harness is arranged in the harness accommodating portion in a state of being separated from the wall surface of the harness accommodating portion by the protrusions.

According to a second aspect of the present invention, in the air duct structure for a vehicle air conditioner according to the first aspect, the ribs are provided so that the protrusions are orthogonal to the length direction of the harness accommodating portion. The harness is held and fixed by the ribs.

According to the invention of claim 3, claims 1 and 2 are provided.
In the blower duct structure for a vehicle air conditioner according to claim 1, the blower duct is divided into a plurality of duct portions by a partition wall in the front and rear, and a harness housing portion is formed in a portion of the upper wall of the blower duct corresponding to the partition wall. And the harness is installed almost directly above the partition wall.

According to a fourth aspect of the present invention, in the air duct structure for a vehicle air conditioner according to the third aspect, the partition wall has openings in a bottom wall of the harness accommodating portion and a bottom wall of the air duct. While a plurality of mounting holes that penetrate vertically are formed, the protrusion is formed separately from the air duct and has a clip portion for holding the harness on the upper surface, and the lower surface has a tip at the tip. A stay portion having a locking hook is provided, the stay portion is inserted from above the mounting hole, the locking hook at the tip is locked to the lower opening edge of the mounting hole, and the protrusion is the bottom wall surface of the harness accommodating portion. It is characterized by being fixed to.

According to a fifth aspect of the present invention, in the air duct structure for a vehicle air conditioner according to the fourth aspect, the clip portion is close to or in contact with the front and rear side wall surfaces of the harness accommodating portion. I am trying.

According to the invention of claim 6, the air-conditioning air-blowing duct disposed inside the instrument panel is
It is characterized in that it is divided into a plurality of duct parts by partition walls, and the partition walls are provided with a heat insulating space.

According to a seventh aspect of the present invention, in the air duct structure for a vehicle air conditioner according to the sixth aspect, the plurality of duct portions are separated by a partition wall in the front-rear direction, and the upper wall of the air duct is formed. It is characterized in that a harness accommodating portion for arranging the harness is recessed along the length direction at a portion corresponding to the partition wall.

According to an eighth aspect of the present invention, in the blower duct structure for a vehicle air conditioner according to the seventh aspect, the heat insulating space is provided on the bottom wall of the harness accommodating portion and the bottom wall of the blower duct. It is characterized in that it is provided so as to penetrate in the vertical direction.

[0014]

According to the first aspect of the present invention, by blowing the cool air to the air duct for a long time, even if dew condensation occurs on the outer surface of the air duct, the harness is provided with the protrusions. Since the wires are routed in a state of being separated from the wall surface of the harness accommodating portion, the harness does not get wet due to dew condensation and the harness itself does not dew.

According to the invention described in claim 2, claim 1
In addition to the effect of the invention described above, the harness is usually fixed by the harness clip, but since the rib exerts a function equivalent to that of the harness clip, the number of parts can be reduced and the cost can be advantageously obtained.

According to the third aspect of the invention, in addition to the effects of the first and second aspects of the invention, the harness is routed directly above the partition wall whose surface rigidity is increased by the partition wall.
It is possible to increase the support rigidity of the harness and prevent generation of abnormal noise even if the harness hits the bottom of the harness accommodating portion due to vehicle vibration.

According to the invention of claim 4, claim 3
In addition to the effect of the present invention, since the protrusion functions as a harness clip, the number of parts can be reduced, which is advantageous in terms of cost, and when the protrusion is attached to the bottom wall of the harness accommodating portion, the stay portion is Long, the position of the mounting hole can be visually checked to easily insert the stay part into the mounting hole, and the engagement state of the locking hook at the tip can be visually checked on the bottom wall side of the air duct to avoid incomplete mounting. can do.

According to the invention of claim 5, claim 4
In addition to the effect of the invention described above, even if the harness is forcibly removed from the clip portion, the clip portion is expanded and regulated by the front and rear side walls of the harness accommodating portion, so that the harness can be prevented from being removed unnecessarily.

According to the invention described in claim 6, even if cold air is blown to one of the plurality of duct portions for a long time to cause dew condensation on the outer surface of the other duct portion, Since the part is insulated by the heat insulating space of the partition wall and is not cooled, dew condensation does not occur.

Therefore, by arranging the harness on the other duct side, the harness can be protected from the condensed water.

Further, when air is blown to the ducts at different temperatures, there is no heat transfer between the ducts, and heat loss can be suppressed.

According to the invention of claim 7, claim 6
In addition to the effects of the invention of the above, since the harness accommodating portion is formed at a portion stiffened by the partition wall of the upper wall of the air duct,
The supporting rigidity of the harness can be increased.

According to the invention described in claim 8, claim 7
In addition to the effects of the invention described above, even if dew condensation occurs on the bottom wall surface of the harness accommodating portion, the heat insulating space also functions as a drainage port of the harness accommodating portion, and condensed water stays in the harness accommodating portion. Can be prevented.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a blower duct to which the present invention is applied. The blower duct 1 is arranged inside an instrument panel (not shown).

The blower duct 1 is made of an appropriate synthetic resin material, and the upper portion 1A and the lower portion 1B are butted and fitted together,
The fitting portion is fused to form a duct structure.

In this embodiment, as shown in FIG. 2, the blower duct 1 is divided into a plurality of duct parts, a vent duct 5 and a defroster duct 6, by a partition wall 4 extending over an upper wall 2 and a bottom wall 3 thereof. It is separated in the front-back direction.

The vent duct 5 is provided at the central portion and both left and right end portions of the instrument panel (not shown) on the rear side facing the occupant, the center ventilator outlet and the center vent connection port connected to the side ventilator outlet. 5
a and a side vent connection port 5b are provided,
At both left and right ends of the defroster duct 6, defroster connection ports 6a connected to defroster outlets provided on the upper surface of the instrument panel facing the front window panel.
Is provided.

On the upper wall 2 of the blower duct 1, the harness accommodating portion 7 is formed with a required front-back width around the portion where the partition wall 4 is formed.
Is provided in the longitudinal direction so that the harness 8 is arranged in the harness accommodating portion 7.

A plurality of protrusions 9 are provided on the wall surface of the harness accommodating portion 7, for example, the bottom wall surface, and the harness accommodating portion is separated from the bottom wall surface of the harness accommodating portion 7 by the protrusions 9. It is assigned to 7.

In this embodiment, a plurality of front and rear ribs 9A are integrally formed on the bottom wall surface of the harness accommodating portion 7 as the protrusion 9 in parallel with the length direction of the harness accommodating portion 7.

Further, the harness 8 is fixedly fixed on these ribs 9A, especially at a position substantially directly above the partition wall 4 by a harness clip or harness clamp (not shown).

According to the structure of the above embodiment, when dew condensation occurs on the outer surface of the blower duct 1 by blowing cool air to the blower duct 1 for a long time when the outside air temperature is high, its upper wall Condensation also occurs on the wall surface of the harness accommodating portion 7 recessed in 2, but since the harness 8 is routed in a state of being separated from the bottom wall surface of the harness accommodating portion 7 by the ribs 9A, the harness 8 gets wet with dew condensation. Therefore, it is possible to prevent poor conduction due to attachment of dew condensation water.

Further, since the harness 8 is arranged on the plurality of ribs 9A so as to be separated from the bottom wall surface of the harness accommodating portion 7 as described above, the harness 8 itself is cooled by heat transfer from the bottom wall surface and its outer surface. There is no condensation on the surface.

Therefore, it is not necessary to provide a water absorbing and water retaining material in the harness wiring portion for the purpose of preventing dew condensation, so that the cost can be obtained advantageously.

In addition to such a dew condensation preventing effect, the harness 8 is routed almost directly above the partition wall 4 whose surface rigidity is increased by the partition wall 4, so that the supporting rigidity of the harness 8 can be enhanced. At the same time, even if the harness 8 hits the bottom of the harness accommodating portion 7 between the fixing points by the harness clip or the harness clamp due to the vibration of the vehicle body, it is possible to prevent the abnormal noise from being generated.

In the embodiment shown in FIG. 2, the rib 9A is formed in the length direction of the harness accommodating portion 7. However, as in the second embodiment shown in FIGS.
A plurality of them may be provided orthogonally to the length direction, and the same effect as the first embodiment can be obtained.

FIG. 5 shows a third embodiment of the present invention. In this embodiment, the rib 9A in the second embodiment is extended upward along the front and rear side wall surfaces of the harness accommodating portion 7. Then, a harness holding portion 9a is formed on the rib 9A with a width substantially the same as the outer diameter of the harness 8, and the harness holding portion 9a is formed.
The harness 8 can be held.

Therefore, according to the structure of the third embodiment, in addition to the effect similar to that of the first embodiment, the rib 9A exerts a function equivalent to that of the harness clip. Since the harness clamp is not required, the number of parts can be reduced and the cost can be further improved.

FIG. 6 shows a fourth embodiment of the present invention. In this embodiment, the rib 9A in the first embodiment is used.
In place of the above, a plurality of pins 9B are integrally formed as the protrusions 9 on the bottom wall surface of the harness accommodating portion 7, and the structure of this embodiment can also obtain the same effect as that of the first embodiment.

7 and 8 show a fifth embodiment of the present invention. In this embodiment, a rectangular block-shaped projection 9 is formed on the bottom wall surface of the harness accommodating portion 7 in the first embodiment. A plurality of pedestals 9C are provided in the length direction of the harness accommodating portion 7, and the harness 8 is arranged on the pedestals 9C and fixed by the harness clamp 10.

Therefore, even in the structure of the fifth embodiment, the same effect as that of the first embodiment can be obtained.

FIG. 9 shows a sixth embodiment of the present invention. In this embodiment, a partition wall 4 is formed which divides the inside of the air blow duct 1 into a vent duct 5 and a defroster duct 6 in the front-rear direction. A heat insulating space 11 is formed in the lengthwise direction.

In this embodiment, the protrusion 9 is not provided on the bottom wall surface of the harness accommodating portion 7 recessed in the upper wall 2 of the blower duct 1, but is provided directly above the partition wall 4 provided with the heat insulating space 11. Although the harness 8 is fixedly fixed by a harness clip (not shown) or the like, this is of course the state in which the harness 8 is separated from the bottom wall surface of the harness accommodating portion 7 by the protrusion 9 as in the first to fifth embodiments. It may be arranged in.

Vent duct 5 as in the sixth embodiment
By providing the heat insulating space 11 in the partition wall 4 that separates the defroster duct 6 from the defroster duct 6, a situation in which cold air is blown to the vent duct 5 for a long time and is not sent to the defroster duct 6 (normally Even in the vent mode operation), the heat insulating space 11 blocks the heat transfer from the vent duct 5 side to the defroster duct 6 side. Therefore, even when dew condensation occurs on the outer surface of the vent duct 5, the harness accommodating portion 7 Then, the amount of dew condensation can be suppressed to a small extent only by dew condensation on the wall surface on the side of the vent duct. Therefore, as described above, the harness 8 is directly attached to the harness accommodating portion 7 directly above the heat insulating space 11. Even if it is installed on the bottom wall of
It is possible to protect the harness 8 by avoiding the adhesion of dew condensation on the harness 8 to the extent that conduction failure occurs.

Of course, in the structure of the sixth embodiment as well, if the structure for separating the harness 8 from the wall surface by the projecting portion 9 as in the first to fifth embodiments is adopted as described above, the harness 8 is further improved. Can be protected from condensation water.

Further, according to the structure of the sixth embodiment,
Since it is possible to prevent the defroster duct 6 from being cooled by the heat insulation space 11 and cooling the defroster duct 6, it is possible to prevent dew condensation on the outer surface of the defroster duct 6. Can be prevented.

Further, when the vent duct 5 and the defroster duct 6 are blown at different temperatures, these ducts 5, 5
The transfer of heat is blocked between 6 and the loss of heat can be suppressed.

In the sixth embodiment, the heat insulating space portion 11 is formed in the partition wall 4 in the length direction thereof, but as in the seventh embodiment shown in FIG. 10, a plurality of heat insulating space portions 11 are formed in the partition wall 4.
May be opened in the bottom wall of the harness accommodating portion 7 and the bottom wall 3 of the blower duct 1 so as to penetrate vertically.

According to the structure of the seventh embodiment, the same effect as that of the sixth embodiment can be obtained, and even if dew condensation occurs on the bottom wall surface of the harness accommodating portion 7, the heat insulating space portion 11 is obtained.
Can function as a drainage port of the harness accommodating portion 7 and prevent condensed water from staying in the harness accommodating portion 7.

11 and 12 show an eighth embodiment of the present invention. This embodiment is a combination of the fifth embodiment shown in FIGS. 7 and 8 and the seventh embodiment shown in FIG. This is a combined example.

That is, in this embodiment, some of the heat insulating space portions 11 in the seventh embodiment are connected to the harness 8
Is effectively used as the mounting hole 11A.

On the other hand, the protrusion 9 in the fifth embodiment.
The pedestal 9C is formed separately from the blower duct 1 and has an upper surface on which an expandable and restorable two-forked clip portion 12 for holding the harness 8 is integrally formed. A stay portion 13 having a locking hook 14 at its tip is integrally formed.

Then, the stay portion 13 is attached to the mounting hole 11a.
From above, and attach the locking hook 14 at the tip to the mounting hole 11
The pedestal 9C is fixed to the bottom wall surface of the harness accommodating portion 7 by being locked to the lower opening edge of a, and the harness 8 is held and fixed.

Therefore, according to the structure of the eighth embodiment, in addition to the effects of the fifth and seventh embodiments, the pedestal 9C functions as a harness clip, so that the number of parts can be reduced, which is advantageous in terms of cost. Obtainable.

When the pedestal 9C, that is, the clip portion 12 is attached to the bottom wall of the harness accommodating portion 7, the stay portion 13 is
Is long, and the stay portion 1
3 can be easily inserted into the mounting hole 11a to improve workability, and moreover, the engagement state of the locking hook 14 at the tip can be visually confirmed on the side of the bottom wall 3 of the blower duct 1 so that incomplete mounting can be achieved. It can be avoided.

FIG. 13 shows a ninth embodiment of the present invention. In the present embodiment, the outer surface of the clip portion 12 in the eighth embodiment is brought into contact with the front and rear side wall surfaces of the harness accommodating portion 7. The protrusion 12a is integrally formed.

Therefore, according to the structure of the ninth embodiment, in addition to the effects of the eighth embodiment, even if the harness 8 is forcibly detached from the clip portion 12, the clip portion 12 is located in front of and behind the harness accommodating portion 7. Since the expansion is restricted by the side wall, it is possible to prevent the harness 8 from being removed unnecessarily.

[Brief description of drawings]

FIG. 1 is a perspective view of a blower duct which is a target of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1 showing the first embodiment of the present invention.

FIG. 3 is a sectional view similar to FIG. 2, showing a second embodiment of the present invention.

FIG. 4 is a sectional view taken along the line BB of FIG.

FIG. 5 is a partial cross-sectional perspective view showing a third embodiment of the present invention.

FIG. 6 is a partial cross-sectional perspective view showing a fourth embodiment of the present invention.

FIG. 7 is a sectional view similar to FIG. 2, showing a fifth embodiment of the present invention.

8 is a cross-sectional view taken along the line CC of FIG.

FIG. 9 is a sectional view similar to FIG. 2, showing a sixth embodiment of the present invention.

FIG. 10 is a partial cross-sectional perspective view showing a seventh embodiment of the present invention.

FIG. 11 is a sectional view similar to FIG. 2, showing an eighth embodiment of the present invention.

FIG. 12 is a cross-sectional view showing a state where the harness shown in FIG. 11 is attached.

FIG. 13 is a sectional view similar to FIG. 12, showing a ninth embodiment of the present invention.

[Explanation of symbols]

1 ... Blower duct 2 ... Top wall 3 ... Bottom wall 4 ... Partition 5 ... Vent duct (duct part) 6 ... Defroster duct (duct part) 7 ... Harness storage 8 ... Harness 9 ... Projection 9A ... Rib (projection) 9C ... Pedestal (projection) 11 ... Space for heat insulation 11a ... Mounting hole 12 ... Clip part 13 ... Stay department 14 ... Locking hook

Claims (8)

[Claims] 1. A harness accommodating portion (7) is provided in a side wall of a ventilation duct (1) for air conditioning arranged inside an instrument panel along the lengthwise direction, and the harness accommodating portion (7) is recessed. A plurality of protrusions (9) are provided on the wall surface of the harness, and the harness (8) is arranged in the harness accommodating portion (7) in a state of being separated from the wall surface of the harness accommodating portion (7) by the protrusions (9). A blower duct structure for a vehicle air conditioner, which is characterized in that 2. The rib (9A), wherein the protrusion (9) is provided orthogonally to the length direction of the harness accommodating portion (7), and the harness (8) is held by the rib (9A). The air duct structure for a vehicle air conditioner according to claim 1, wherein the air duct structure is held and fixed. 3. The air duct (1) is divided into a plurality of duct parts (5), (6) by a partition wall (4) in the front and rear, and the harness accommodating part (7) has an upper wall of the air duct (1). The vehicle according to claim 1 or 2, wherein the harness (8) is formed in a portion of the partition wall (2) corresponding to the partition wall (4), and the harness (8) is arranged substantially directly above the partition wall (4). Ventilation duct structure for the air conditioner. 4. The partition wall (4) is provided with a plurality of mounting holes (11a) which are open in the bottom wall of the harness housing portion (7) and the bottom wall (3) of the blower duct (1) and penetrate vertically. On the other hand, the projection (9) is formed separately from the air duct (1), and the clip (12) holds the harness (8) on the upper surface thereof.
It is equipped with a hook (1
4) is provided, the stay portion (13) is inserted from above the attachment hole (11a), and the locking hook (14) at the tip is provided at the lower opening edge of the attachment hole (11a). The air duct structure for a vehicle air conditioner according to claim 3, wherein the projection (9) is locked and fixed to the bottom wall surface of the harness accommodating portion (7). 5. The air duct structure for a vehicle air conditioner according to claim 4, wherein the clip portion (12) is close to or in contact with the front and rear side wall surfaces of the harness housing portion (7). 6. A ventilation duct (1) for air conditioning arranged inside an instrument panel is divided by a partition wall (4) into a plurality of duct parts (5), (6), and the partition wall (4). ) Is provided with a heat insulating space portion (11). 7. A plurality of duct parts (5), (6) are separated by a partition wall (4) in the front-rear direction, and at a portion corresponding to the partition wall (4) of the upper wall (2) of the blower duct (1). The air duct structure for a vehicle air conditioner according to claim 6, wherein the harness accommodating portion (7) for arranging the harness (8) is recessed along the length direction. 8. A heat insulating space portion (11) is vertically penetrated through a bottom wall of the harness accommodating portion (7) and a bottom wall (3) of the blower duct (1). The air duct structure for the vehicle air conditioner according to claim 7.