JP3510180B2 - Air duct - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower duct which is connected to an air conditioning unit of a vehicle and branches and guides blown air toward a plurality of outlets provided in an instrument panel or the like.

[0002]

2. Description of the Related Art Conventionally, in vehicles such as passenger cars, two central vent outlets are provided in the central portion of an instrument panel, and side vent outlets are provided on both left and right sides of the instrument panel. The air conditioning unit is configured to guide the air whose temperature is adjusted by mixing the air.

As such a conventional technique, for example, one described in Japanese Patent Laid-Open No. 11-147414 is known. In this publication, as shown in FIGS. 8 and 9, a main duct 100 extending upward from an air conditioning unit, and a branch duct 101 branched left and right from the main duct 100.
And a bulging portion 102 bulging the ceiling plate toward the inside of the main duct, and an outer surface of the bulging portion 102,
Adjacent guide surfaces 103, 103, that is, the guide surface 1 for guiding the air flowing through the main duct 100 to the branch duct 101.
03 and a partition plate 104 for partitioning the guide surface 103 leading to the downstream of the main duct 100.

Therefore, according to this conventional technique, the air flowing from the air conditioning unit is branched so as not to cause a pressure loss, is guided to each air outlet, and is distributed to each air outlet in a desired amount. As a result, each part of the vehicle compartment can be air-conditioned uniformly.

[0005]

However, the above-mentioned conventional techniques have the following problems to be solved. Since the partition plate 104 is provided inside the main duct 100, it cannot be manufactured using an inexpensive manufacturing means such as, for example, blow molding, resulting in high cost. Since the air flow is distributed by the guide plate 103 and the partition plate 104, in order to achieve both the air flow rate and the flow velocity, the shape of the branch duct 101 is limited to a substantially horizontal branch as shown in FIG. Yes, the degree of freedom in design is low. That is, it is not possible to obtain a high degree of design freedom while ensuring the air flow rate and the flow velocity. Further, in recent years, it has been desired to improve energy efficiency in a vehicle to improve fuel efficiency and reduce vehicle interior noise to improve a vehicle interior environment. Therefore, even in this conventional technique, it is desired to further improve the pressure loss, improve the ventilation efficiency, and reduce the wind noise. However, in the above-mentioned conventional technique, at the place where the air blow is branched,
Since the part that guides the main duct 100 and the part that guides the branch duct 101 are both completely independent, the ventilation resistance is high, and the improvement of the ventilation efficiency and the noise reduction are not sufficient. By the way,
The ventilation resistance that causes pressure loss is proportional to the surface area of the passage.

The present invention has been made by paying attention to the above-mentioned conventional problems, and by distributing the blast with a structure in which an independent partition plate is abolished, the degree of freedom in design can be increased while securing the air flow rate and the flow velocity. It is possible to improve the air flow rate, and to use an inexpensive manufacturing method such as blow molding, which can reduce the manufacturing cost, reduce the pressure loss, and improve the ventilation efficiency and wind noise. The purpose is to reduce and improve the vehicle interior environment.

[0007]

In order to achieve the above-mentioned object, the present invention is connected to an inlet for introducing air from an air conditioning unit mounted on a vehicle and a plurality of outlets provided in a passenger compartment. A plurality of branch ducts, a blower guide portion provided between the inlet and the branch ducts for guiding the blown air introduced from the inlet toward each branch duct, and a blower guide portion provided in the blower guide portion. A blower duct formed of resin as a raw material, comprising partitioning means for partitioning and forming a guide passage that extends toward the connection part of each branch duct inside the guide part and guides the blown air to a predetermined branch duct. The blower guide portion is recessed inward from the outer surface side in a groove shape, and the groove-like recess is directed from the branch point between the connecting portions connecting the plurality of branch ducts to the introduction port side. For extension and distribution on the outer surface By forming, the distribution wall is formed so as to be bulged from the inner surface of the blower guide portion to the facing surface side and to be erected, and to extend from the branch point toward the introduction port side. The partition means is constituted by the distribution wall, the distribution wall is formed with a depth that does not reach the facing surface, and the partition wall sandwiches between the distribution wall and the inner surface of the air guide section facing the distribution wall. Adjacent guide passages are connected by the passages.

According to a second aspect of the invention, in the air duct according to the first aspect, the branch walls are formed on each of two opposing surfaces of the air guide section.

According to a third aspect of the present invention, in the air duct according to the first aspect, the branch wall is formed only on one surface of the air guide section.

According to a fourth aspect of the invention, in the air duct according to the first to third aspects, the distribution wall has a slope whose height gradually increases from the introduction port side at the end portion on the introduction port side. It is characterized in that a portion is formed.

According to a fifth aspect of the present invention, in the air duct according to the first to fourth aspects, the air guide portion is a center guide passage connected to a center vent duct as a branch duct, and a side as a branch duct. It is characterized by being divided into two guide passages, a side guide passage connected to the vent duct.

According to a sixth aspect of the present invention, in the air duct according to the first to fourth aspects, the air guide portion is a center guide passage connected to a center differential duct as a branch duct, and a side differential as a branch duct. It is characterized in that it is divided into two guide passages, a side guide passage connected to the duct.

[0013]

According to the present invention, in dividing the blower guide portion into the plurality of guide passages by the dividing means, unlike the conventional structure in which the dividing wall is completely divided by the partition wall,
The ventilation guide portion is recessed from the outer surface side to form a distribution groove, and the inner surface of the ventilation guide portion is bulged toward the opposing surface side to partition the standing distribution wall into a plurality of guide passages as partitioning means. I decided. Therefore, the blower guide portion including the partition means can be formed in a tubular cross-sectional shape, and can be formed by blow molding. Therefore, there is an effect that the cost can be reduced.

Next, when air is blown by the air blow duct of the present invention, the air blown from the air conditioning unit to the inlet is branched into each guide passage in the air blow guide section, and then guided to the branch ducts. The air is blown into the passenger compartment from the branch duct through the outlet. In this way, when the blown air is guided by the guide passages, the guide passages are not completely partitioned by the communication passages over the entire length of the distribution wall. Is suppressed, which suppresses pressure loss, improves air distribution efficiency, and
Wind noise is reduced. As a result, the effect of improving the vehicle interior environment can be obtained. The communication passage is formed between the tip of the distribution wall on the bulging side and the inner surface facing this. The distribution wall is also formed on the inner surface facing the distribution wall. A communication passage may be formed therebetween (for example, the invention according to claim 2), or the distribution wall may be provided only on one of the facing inner surfaces so that the communication passage is formed between the facing flat surfaces. (For example, the invention according to claim 3).

Further, the distribution wall which divides each of the guide passages is formed by bulging the inner surface of the blower guide portion inward and extending in a streak manner from the inlet to the branch point. It is possible to form the blower guide portion in any shape, and as described above, it is possible to obtain a high degree of design freedom while having a structure with a small pressure loss that can secure the air flow rate and the flow velocity. Produce an effect. In the invention according to claim 3, since the branch groove and the branch wall are formed only on one surface of the blower guide portion, the cost can be reduced.

According to the invention described in claim 4, when the air blown from the inlet is distributed to each guide passage by the distribution wall in the air guide part, the air is first blown gradually toward the distribution wall. Is distributed while hitting the portion formed so as to have a higher height. That is, in the case of a configuration in which the distribution wall rises abruptly, turbulent flow is likely to occur at this rising portion and pressure loss tends to increase, but in the present invention, turbulence is generated due to the gradually increasing height. Generation of flow is suppressed, and pressure loss can be suppressed.

According to the fifth aspect of the present invention, when the vent mode is set during the operation of the air conditioning unit, in the air conditioning unit, the air set to the optimum temperature or humidity for air conditioning of the passenger compartment is generated. The air is blown from the introduction port to the blower guide portion, branched into the center guide passage and the side guide passage, and then sent to the center vent duct and the side vent duct, respectively, and blown from the air outlet toward the vehicle compartment. In the invention according to claim 6, when the differential mode is set at the time of operating the air conditioning unit, in the air conditioning unit,
The air set to the optimum temperature or humidity for defrosting the window glass is blown from the inlet to the air guide section and branched into the center guide passage and the side guide passage. It is sent to the side differential duct and blown from the outlet toward the window glass.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall configuration diagram of a blower duct according to an embodiment of the present invention. A ventilation vent duct 1 and a ventilation differential duct 2 are connected to the air conditioning unit 3 so as to be blown.

The blower vent duct 1 is the first embodiment of the present invention and corresponds to the invention described in claims 1, 2 and 45. FIG. 2 is a perspective view of the blower vent duct 1 as seen diagonally from the front and diagonally above the vehicle, FIG. 3 is a perspective view of the blower vent duct 1 as seen from diagonally rearward and diagonally below the vehicle, and FIG. 4 is the blow vent duct 1 FIG. Figure 2
As shown in FIG. 4, the blower vent duct 1 is connected to the central main duct 11 that serves as a blower guide portion of the claims and upper portions of the left and right end portions of the main duct 11 and extends rearward of the vehicle. A center vent duct 12 as a branch duct, and a side vent duct 13 as a branch duct in the claims, which is connected to the side surfaces of the left and right ends of the main duct 11 and extends left and right. It is configured by being integrated.

The main duct 11 has an air conditioning unit connection port 16 provided at the lower end thereof connected to the upper surface of the air conditioning unit 3 (see FIG. 1). From the air conditioning unit 3, a heater core (not shown) is passed through. The generated air and the air that has passed through the evaporator (not shown) are blown in a state of being mixed at a predetermined distribution by an air mix door (not shown). Also, in the main duct 11, at each of the left and right end portions,
An upper center connecting portion 17 and a side connecting portion 18 are provided with the branch point 14 interposed therebetween, and a center guide passage 22 extending from the air conditioning unit connecting port 16 to the center connecting portion 17 and the side connecting portions 18 provided on the left and right, and The side guide passages 23 are formed on the left and right (see FIG. 5).

Each of the center vent ducts 12 has a base end portion connected to the center connection portion 17 of the main duct 11, and a tip end portion provided at the center left and right of the instrument panel (not shown). A center vent outlet 19 connected to the vent outlet is formed. Further, while the side duct 13 has a base end portion connected to the side connection portion 18 of the main duct 11,
Side vent outlets 20 connected to the side vent outlets provided at the left and right ends of the instrument panel (not shown) are formed at the tip portion.

Further, the front surface 11 of the main duct 11
The outer surface of a (see FIG. 2) and the outer surface of the rear surface 11b (see FIG. 3) are both grooved inward from the outer surface side, and the grooved recesses are provided in the air conditioning unit connection port. A distribution groove 15 extending in the shape of a streak from the vicinity of 16 toward the branch point 14 is formed, whereby A- in FIG.
As shown in FIG. 5 which is a sectional view taken along the line A, a distribution wall 21 is erected on the inner surface of the main duct 11 so as to bulge inwardly toward the facing surface and acts as a partitioning means. It is divided into a center guide passage 22 and a side guide passage 23. In the present embodiment, the distribution walls 21 are formed so as to face each other, and the bulged ends 21a, 2 of the both are formed.
A communication passage A, which is a narrow space that communicates the adjacent center guide passage 22 and side guide passage 23, is formed between 1a. Further, the distribution wall 21 is formed such that the height gradually increases at the end portion on the side near the air conditioning unit connection port 16, and the communication passage A has the branch point 14 at the branch point 14.
The side near the air conditioning unit connection port 16 is formed wider than the side.

Next, the operation and effect of the first embodiment will be described. In the ventilation vent duct 1 of the above-described first embodiment, the outer surface of the main duct 11 is linearly recessed to form the distribution groove 15, so that the inner surface of the main duct 11 bulges inward. The distribution wall 21 is formed, and the distribution wall 21 divides the center guide passage 22 and the side guide passage 23 as shown in the sectional view of FIG. Therefore, since the partitioning means has a cylindrical configuration without a partition member such as a partition plate, it can be formed by blow molding. In this way, the main duct 11
Since all are formed by blow molding, it is possible to obtain an effect that the manufacturing cost can be reduced and the cost can be reduced. In addition, when the air is blown by the ventilation vent duct 1,
The air blown from the air conditioning unit 3 to the air conditioning unit connection port 16 is guided to the upper left and right through the main duct 11, and is distributed by the distribution wall 21 to the center guide passage 22.
And the side guide passage 23. The air blown through the center guide passage 22 is sent to the center vent duct 12, while the air blown through the side guide passage 23 is sent from the side connecting portion 18 to the side vent duct 13.
Sent to. In this way, the blown air is sent to the main duct 11 and distributed to the center guide passage 22 and the side guide passage 23, but both guide passages 22 and 23 are communicated with the communication passage A and are completely partitioned. Therefore, the ventilation resistance in each passage is suppressed, which suppresses the pressure loss, improves the air distribution efficiency, and reduces the generation of wind noise. As a result, the effect of improving the vehicle interior environment can be obtained.

Further, as described above, the main duct 1
The distribution wall 21 that divides the air blown to the air duct 1 into the center guide passage 22 and the side guide passage 23 into two is provided from the air conditioning unit connection port 16 toward the branch point 14 to the main duct 1
No matter what shape the main duct 11 has, the center guide passage 2 can be bulged inward.
The structure can be divided into two and the side guide passages 23, and as described above, there is an effect that a high degree of freedom in design can be obtained even though the structure has a small pressure loss that can secure the air flow rate and the flow velocity.

Further, since the distribution wall 21 is formed so that the height at the end near the air conditioning unit connection port 16 gradually increases, the distribution wall suddenly rises. In the case of such a configuration, turbulent flow is likely to occur in the rising portion and the pressure loss is likely to increase, but the turbulent flow is suppressed by the slope portion, and the pressure loss can be further reduced.

(Embodiment 2) FIG. 6 shows a perspective view of an air blowing differential duct 2 as Embodiment 2 of the present invention. The second embodiment corresponds to the invention described in claims 1, 2, 4, and 6, and in the first embodiment, it is applied to a portion for distributing the air blow to the center vent duct 12 and the side vent duct 13. However, in the second embodiment, as shown in FIG. 6, the present invention is applied to the distribution from the main duct 30 as a blower guide portion to the front differential duct 31 and the side differential duct 32 as branch ducts in the blower differential duct 2. Therefore, in the second embodiment, the front differential duct 31 as the branch duct is the main duct 3
It is formed integrally with 0. In addition, in this figure,
34 is a distribution groove. Further, as shown in FIG. 7 which is a sectional view taken along line BB of FIG. 6, the distribution groove 34 and the distribution wall 3 are provided.
5 is formed on both surfaces facing each other as in the first embodiment, but these are formed alternately, so that the inside of the main duct 30 is divided into a side differential guide passage 36 and a center differential guide passage 37. There is.

In the second embodiment, the air blown from the air conditioning unit 3 is guided to the front differential duct 31 through the center differential guide passage 37 and to the side differential duct 32 through the side differential guide passage 36. .
Further, in the second embodiment, since the distribution walls 35 are formed so as to alternate with each other, the main duct 30
Even if the inside of the passage has a small height, the communication passage A can be secured, and as a result, as in the first embodiment,
It is possible to distribute the blast while having a structure with little pressure loss. Although the embodiment has been described with reference to the drawings, the present invention is not limited to this. For example,
In the embodiment, the distribution walls 21 partitioning the guide passage of the main duct 11 into the center guide passage 22 and the side guide passages 23 may face each other as shown in FIG. 5, or as shown in FIG. In addition, they may be provided alternately, or they may be provided on only one side surface. In short, when distributing the blast into a plurality of parts, the present invention can be applied to one in which a distribution wall can be formed from the vicinity of the air conditioning unit connection port toward the branch point.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing a blower duct of an air conditioning unit of an embodiment.

FIG. 2 is a perspective view of the ventilation vent duct according to the first embodiment as seen from diagonally front and diagonally above the vehicle.

FIG. 3 is a perspective view of the ventilation vent duct according to the first embodiment as seen from diagonally rearward and diagonally downward of the vehicle.

FIG. 4 is a plan view of the ventilation vent duct according to the first embodiment.

FIG. 5 is a cross-sectional view taken along line AA of the ventilation vent duct according to the first exemplary embodiment.

FIG. 6 is a perspective view of a blower diff duct according to a second embodiment.

FIG. 7 is a cross-sectional view taken along line BB of the blower diff duct according to the second embodiment.

FIG. 8 is a perspective view of a conventional air blow duct.

FIG. 9 is an enlarged view of a branched portion of a conventional air blow duct.

[Explanation of symbols]

A communication passage 1 Bent vent duct 2 blast diff duct 3 air conditioning unit 11 Main duct 11a front 11b rear side 12 Center vent duct 13 Side vent duct 14 fork 15 distribution grooves 16 Air conditioning unit connection port 17 Center connection part 18 Side connection 19 Center vent outlet 20 Side vent outlet 21 distribution wall 22 Center guide passage 23 Side guide passage 30 main duct 31 front differential duct 32 side differential duct 33 fork 34 distribution groove 35 distribution wall 36 Side differential guide passage 37 Center differential guide passage 100 main duct 101 branch duct 102 bulge 103 guideway 104 partition plate

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-11-245642 (JP, A) JP-A-10-309926 (JP, A) Actually open 62-43914 (JP, U) Actually open 62- 163457 (JP, U) Actual development Sho 62-162111 (JP, U) Actual development Sho 64-43914 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60H 1/00-3 / 06 F24F 13/00-13/18

Claims (6)

(57) [Claims] 1. An inlet for introducing air from an on-vehicle air conditioning unit, a plurality of branch ducts respectively connected to a plurality of outlets provided in a vehicle compartment, and between the inlet and the branch duct. And a blower guide part for guiding the blown air introduced from the inlet toward each branch duct, and a blower guide part provided in this blower guide part and extending inside the blower guide part toward the connection part of each branch duct. And a partitioning means for partitioning and forming a guide passage for guiding the blast to a predetermined branch duct, the blast duct being formed of a resin material, wherein the blast guide is recessed inward from the outer surface side to the inner side. And, by forming the groove for distribution on the outer surface by extending from the branch point between the connecting portions connecting the plurality of branch ducts to the introduction port side, the distribution groove is formed on the outer surface. ,
A distribution wall is formed which is bulged from the inner surface of the blower guide portion to the opposite surface side and is erected, and extends from the branch point toward the introduction port side, and the partitioning means is formed by the distribution wall. A guide passage adjacent to the distribution wall formed by a depth that does not reach the facing surface and sandwiched between the distribution wall and the inner surface of the air guide section facing the distribution wall. A ventilation duct characterized by being communicated with. 2. The air duct according to claim 1, wherein the branching wall is formed on each of two opposing surfaces of the air guide section. 3. The blow duct according to claim 1, wherein the branch wall is formed only on one surface of the blow guide portion. 4. The distribution wall is formed at the end on the introduction port side so that the height gradually increases from the introduction port side. Air duct. 5. The blower guide portion is divided into two guide passages, a center guide passage connected to a center vent duct as a branch duct and a side guide passage connected to a side vent duct as a branch duct. The blower duct according to any one of claims 1 to 4, wherein: 6. The air guide section is divided into two guide passages, a center guide passage connected to a center differential duct as a branch duct and a side guide passage connected to a side differential duct as a branch duct. The blower duct according to any one of claims 1 to 4, wherein: