JP2013049388A - Air-conditioning duct of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-conditioning duct capable of flowing out air-conditioning air by branching it off in the desired direction, without receiving restriction on a layout and restriction on a die structure.SOLUTION: This air-conditioning duct 1 includes a tubular duct body 2, a blowout hole 3 and a recessed part 4 formed in the duct body 2. The duct body 2 partitions a flow passage 8 of the air-conditioning air inside along the predetermined flow direction 20 to the downstream side from the upstream side. The recessed part 4 integrally bends from the duct body 2 so as to project to the flow passage 8 in the peripheral edge vicinity on the downstream side of the blowout hole 3, and is recessed toward the flow passage 8 from the outer surface side of the duct body 2. An upstream side inner surface 11 of the recessed part 4 makes a part of the air-conditioning air of flowing in the flow passage 8 flow out of the blowout hole 3 by branching it off from the predetermined flow direction 20.

Description

  The present invention relates to an air conditioning duct of a vehicle.

  In general, the conditioned air generated by the air conditioning unit flows through the air conditioning duct and flows out of the downstream end into the vehicle interior.

JP 2010-189001 A JP 2005-186924 A

  When a part of the conditioned air is desired to flow out of the air conditioning duct into the passenger compartment on the upstream side of the downstream end of the air conditioning duct, it may be possible to form a blowout hole in the air conditioning duct. However, simply forming the blow hole does not cause the conditioned air to flow out from the blow hole in a desired direction due to the influence of the conditioned air flowing from the upstream side to the downstream side of the blow hole.

  Further, as another method, it is conceivable to provide a branch duct portion or a guide or the like that protrudes to the outside of the air conditioning duct. However, the branch duct portion and the guide protruding from the air conditioning duct are likely to be restricted in layout, and may be difficult to arrange or may be difficult to establish on the mold structure (on the mold structure).

  SUMMARY OF THE INVENTION An object of the present invention is to provide an air conditioning duct that is less susceptible to layout restrictions and mold structure restrictions and that allows air conditioned air to diverge and flow in a desired direction.

  In order to achieve the above object, an air conditioning duct according to the present invention includes a tubular duct body, and blowout holes and recesses formed in the duct body. The duct body divides a flow path of conditioned air along a predetermined flow direction from the upstream side to the downstream side.

  The concave portion is bent integrally from the duct body so as to protrude into the flow passage in the vicinity of the peripheral edge on the downstream side of the blowout hole, and is recessed from the outer surface side of the duct main body toward the flow passage. The upstream inner surface of the recess allows a part of the conditioned air flowing through the flow passage to branch out from a predetermined flow direction and to flow out from the blowout hole.

  In the said structure, a blowing hole is formed in the location which wants to flow out one part of air-conditioning wind among the intermediate parts of a duct main body, and a recessed part is formed in the peripheral vicinity of the downstream of a blowing hole. Part of the conditioned air flowing through the flow passage branches off from the predetermined flow direction by the upstream inner surface of the recess and flows out from the blowout hole. The direction of the conditioned air flowing out of the blow hole out of the conditioned air flowing upstream of the blow hole changes according to the increase / decrease of the protrusion height of the recess with respect to the peripheral edge of the blow hole, so the protrusion height of the recess is suitable. By setting the height to be high, the conditioned air can be branched in a desired direction and allowed to flow out of the blowout hole.

  In addition, since it is not necessary to provide a portion protruding from the outer surface of the duct body, it is difficult to be restricted in layout and can be arranged in a limited space.

  Furthermore, when providing a portion that protrudes from the outer surface of the duct body, such as a branch duct, in order to form an air conditioning duct by resin injection molding, a split mold mating surface (parting line) is projected from the outer surface. Must be set to On the other hand, in the said structure, since it is not necessary to provide the part which protrudes from the outer surface of a duct main body, a parting line can be set arbitrarily.

  Further, the upstream inner surface of the recess may have an inclined surface shape that is inclined toward the downstream side. The outflow angle of the conditioned air from the outlet hole with respect to the predetermined flow direction increases and decreases according to the increase and decrease of the inclination angle of the upstream inner surface with respect to the predetermined flow direction.

  In the said structure, an air conditioning wind can be made to flow out toward a desired direction from a blower hole by setting the inclination angle of the upstream inner surface of a recessed part to a suitable angle.

  According to the air-conditioning duct of the present invention, it is difficult to be restricted by layout restrictions and mold structure restrictions, and the conditioned air can be branched and discharged in a desired direction.

It is an appearance perspective view of an air-conditioning duct concerning one embodiment of the present invention. It is an external view which expands and shows the principal part of FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. It is sectional drawing which shows the aspect which decreased the inclination angle of the upstream inner surface of a recessed part.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 3, the air conditioning duct 1 for a vehicle includes a tubular duct body 2, and blowout holes 3 and recesses 4 formed in the duct body 2. The air conditioning duct 1 is made of resin and is integrally formed by injection molding. The air-conditioning duct 1 is fixed to the front lower side of the driver's seat in the passenger compartment (in front of the driver's feet) by a bracket 5, and airflow is distributed between the upstream end 6 and the downstream end 7 of the duct body 2. Road 8 is demarcated. The conditioned air in the flow passage 8 flows along the predetermined flow direction 20 from the upstream end 6 (upstream side) to the downstream end 7 (downstream side).

  The upstream end 6 of the duct body 2 is connected to an air conditioning unit (not shown) via a relay duct (not shown), and conditioned air generated by the air conditioning unit is supplied to the duct body 2 by an air conditioning fan (not shown). . The vehicle of the present embodiment is a right-hand drive vehicle, and an accelerator pedal (not shown), a brake pedal (not shown), and a footrest (not shown) are arranged from the right side to the left side in front of the driver's seat. . The air-conditioning duct 1 extends from the left front of the footrest to the left front of the brake pedal, and the upstream end 6 and the downstream end 7 of the duct body 2 are located at the left front of the footrest and the left front of the brake pedal, respectively. The downstream end 7 of the duct body 2 opens toward the accelerator pedal and the brake pedal, and the conditioned air from the opening of the downstream end 7 of the duct body 2 is the foot of the driver's right foot placed on the accelerator pedal or the brake pedal. Spill out towards.

  The blowout hole 3 is formed in the vicinity of the footrest. The recess 4 is bent integrally from the duct body 2 so as to protrude into the flow path 8 in the vicinity of the peripheral edge on the downstream side of the blowout hole 3, and is recessed from the outer surface 2 a side of the duct body 2 toward the flow path 8.

  The upstream inner surface 11 of the recess 4 causes part of the conditioned air flowing through the flow passage 8 to branch out from the predetermined flow direction 20 and flow out from the blowout hole 3. The upstream inner surface 11 has an inclined surface shape inclined toward the downstream side, and is formed in a semicircular arc shape along the peripheral edge of the blowing hole 3 in a region of about 180 ° on the downstream side of the blowing hole 3.

  The outflow angle θa of the conditioned air from the blowout hole 3 with respect to the predetermined flow direction 20 increases and decreases according to the increase and decrease of the inclination angle θb of the upstream inner surface 11 with respect to the predetermined flow direction 20. For example, as shown in FIG. 3, when the inclination angle θb of the upstream inner surface 11 is large (when it is close to a right angle with respect to the predetermined flow direction 20), the outlet angle θa of the conditioned air from the blowout hole 3 is also large (at a right angle) 4, when the inclination angle θb of the upstream inner surface 11 is small (when away from a right angle with respect to the predetermined flow direction 20), the outflow angle θa of the conditioned air from the blowout hole 3 is also It becomes smaller (close to the predetermined distribution direction 20). The inclination angle θb of the upstream inner surface 11 of the present embodiment is set so that the outflow direction 21 of the conditioned air from the blowout hole 3 is directed to the front of the footrest (the foot of the left foot of the driver placed on the footrest). .

  The downstream inner surface 12 of the blowing hole 3 is gently inclined and continues to the inner surface 2b of the duct body 2 so that the conditioned air flowing toward the downstream end 7 without flowing out of the blowing hole 3 flows smoothly.

  According to this embodiment, a part of the conditioned air flowing through the flow passage 8 of the duct body 2 branches off from the predetermined flow direction 20 by the upstream inner surface 11 of the recess 4 and flows out from the blowout hole 3. Then, by adjusting and setting the inclination angle θb of the upstream inner surface 11 of the recess 4 and the protrusion height H of the recess 4, a desired amount of conditioned air is supplied from the blowout hole 3 in a desired direction 21 (footrest To the front).

  Further, since it is not necessary to provide a portion protruding from the outer surface 2a of the duct body 2, it is difficult to be restricted by the layout and can be arranged in a limited space.

  In addition, when providing a portion that protrudes from the outer surface of the duct body, such as a branch duct, in order to form an air conditioning duct by resin injection molding, the mating surface (parting line) of the split mold (molding die) is the outer surface. However, in this embodiment, since it is not necessary to provide a portion protruding from the outer surface 2a of the duct body 2, the parting line 13 can be arbitrarily set, It is difficult to receive the restrictions. In addition, the parting line 13 of this embodiment is set in the position which does not pass the blowing hole 3. FIG.

  As described above, the present invention has been described based on the above embodiment, but the present invention is not limited to the content of the above embodiment, and can be appropriately changed without departing from the present invention. is there.

  For example, the shape of the blowout hole 3 is arbitrary, and may be a rectangle or the like in addition to the circular shape. The upstream inner surface 13 of the recess 4 may be substantially orthogonal to the flow direction 20 without being inclined with respect to the flow direction 20. The air-conditioning duct 1 is not limited to the one that allows the air-conditioning air to flow out to the feet of the driver, and may be any air-conditioning duct provided in the vehicle, and may be other than resin (for example, metal).

1: Air-conditioning duct 2: Duct body 2a: Duct body outer surface 2b: Duct body inner surface 3: Blow hole 4: Recess 6: Upstream end 7: Downstream end 8: Flow passage 11: Upstream inner surface 12 of the recess Downstream inner surface 13: Parting line 20: Flow direction 21: Outflow direction from blowout hole θa: Outflow angle of conditioned air θb: Inclination angle H of upstream inner surface H: Projection height of recess

Claims (2)

A tubular duct body that divides a flow path of conditioned air along a predetermined flow direction from the upstream side to the downstream side, and
A blowout hole formed in the duct body;
A concave portion that is integrally bent from the duct main body so as to protrude into the flow passage in the vicinity of the peripheral edge on the downstream side of the blowout hole, and is recessed from the outer surface side of the duct main body toward the flow passage;
An air conditioning duct of a vehicle characterized in that the upstream inner surface of the recess diverges part of the conditioned air flowing through the flow passage from the predetermined flow direction and flows out from the blowout hole. The air conditioning duct according to claim 1,
The upstream inner surface of the recess is an inclined surface inclined toward the downstream side,
An outflow angle of the conditioned air from the outlet hole with respect to the predetermined flow direction is increased or decreased according to an increase or decrease of an inclination angle of the upstream inner surface with respect to the predetermined flow direction.

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