JP2004257597A - Bent duct and method of manufacturing bent duct - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bent duct capable of easily forming a separation plate producing less pressure loss in air passing and generating less wind noise at the outlet part thereof in the bent duct forming a bent part between an inlet part and the outlet part. <P>SOLUTION: In the bent duct 10 forming the bent part between the inlet part 11 and the outlet part 12, the separation plate 20 allowing a plurality of passages to be formed in the bent duct 10 is installed therein ranging from the inlet part 11 to the outlet part 12. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

上表のように、本実施の形態では、従来例のものより、曲折ダクトの圧損が少なくなり、また曲折ダクト出口での風音も低くなっている。
【００１５】
また、図９に記すように、曲折ダクト１０が３次元的に曲折している場合でも、内部に挿入する分離体２０の分離板２１を、その曲折ダクト１０の曲折に対応可能に捩じれ形状に構成可能である。
【００１６】
なお、本実施の形態で説明した分離体２０の分離板２１は、予め曲折ダクト１０の曲折に対応可能に曲げた形状で製作する例を説明したが、これに限られるものではなく、製作時には、曲折していない平板形状で、曲折ダクト１０に挿入時に前記平板を曲げて挿入する曲折可能部材で製作しても良い。
なお、本実施の形態で説明した分離体２０は、必要に応じて分離板２１のサイズ、例えば、分離板２１の幅を変更することが可能である。そして、分離板２１の枚数や、設置位置は、曲折ダクト１０の断面形状や曲がり具合に応じて適宜に設定し得る。
なお、本実施の形態で説明した曲折ダクト１０には、右流路１４、左流路１５と２流路に分流する仕切壁１６を形成している曲折ダクト１０の例を説明したが、これに限定されるものでなく、例えば、曲折ダクト１０の内部には、仕切壁１６が形成していなくても良いし、３流路以上に分流する複数の仕切壁１６が形成していても良い。
なお、本実施の形態で説明した曲折ダクト１０は、空調機６０と、吹出口６１と、をボルト１７で接続する構成を例示したが、これに限られるものでなく、例えば、ウレタンシール（図、符号なし）で接続する構成でも良い。その場合には、例えば、空調機６０の出口部が曲折ダクト１０のフランジ１１ａに嵌合可能な構成である。そして空調機６０の出口部の全周にシール材（例えば、ウレタンシール）を巻き付けておき、曲折ダクト１０のフランジ１１ａに前記シール材を巻き付けた前記空調機６０の出口部を嵌合して接続する構成とする。また、吹出口６１の入口部と曲折ダクト１０のフランジ１２ａも同様な構成とするため説明は省略する。
【００１７】
【発明の効果】
以上説明したように、請求項１〜２のいずれかに記載の曲折ダクト１０を用いれば、通風時の圧損が少なく、その出口部１２で風音が少なく、且つ簡便に分離板２１を形成可能な曲折ダクト１０を提供することができる。また、請求項３に記載の曲折ダクトの製造方法を用いれば、通風時の圧損が少なく、その出口部１２で風音が少なく、且つ簡便に分離板２１を形成可能な曲折ダクト１０を製造することができる。
【図面の簡単な説明】
【図１】本発明の曲折ダクト１０を、自動車の室内空調に用いる空調機からの通風曲折ダクトに適用した一実施の形態の全体斜視図である。
【図２】（ａ）曲折ダクト１０の入口部１１、及び（ｂ）曲折ダクト１０の出口部１２について説明する図である。
【図３】分離体２０について説明する図である。
【図４】分離体２０を曲折ダクト１０に挿入する前の状態について説明する図である。
【図５】分離体２０を曲折ダクト１０に挿入した後の入口部１１について説明する図である。
【図６】分離体２０を曲折ダクト１０に挿入した後の出口部１２でバンド２３ａを曲げていない状態について説明する図である。
【図７】分離体２０を曲折ダクト１０に挿入した後の出口部１２でバンド２３ａをＬ字形状（９０度）に曲げた状態について説明する図である。
【図８】分離体２０を曲折ダクト１０に挿入した後の出口部１２でバンド２３ａをＵ字形状（１８０度）に曲げた状態について説明する図である。
【図９】３次元的に曲折している曲折ダクト１０の内部に、分離板２１を挿入した状態について説明する図である。
【図１０】従来の、「ａ形状」の曲折ダクト３０の斜視図（ａ）、及び前記（ａ）のＡ〜Ａ線断面図（ｂ）について説明する図である。
【図１１】従来の、「ｂ形状」の曲折ダクト４０の斜視図（ａ）、及び前記（ａ）のＢ〜Ｂ線断面図（ｂ）について説明する図である。
【図１２】従来の、「ｃ形状」の曲折ダクト５０の斜視図（ａ）、及び前記（ａ）のＣ〜Ｃ線断面図（ｂ）について説明する図である。
【符号の説明】
１０ 曲折ダクト
１１ 入口部
１２ 出口部
２０ 分離体
２１ 分離板[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a bent duct in which a bent portion is formed between an inlet portion and an outlet portion, and through which a fluid flows.
[0002]
[Prior art]
Conventionally, for example, a ventilation duct having a bent portion from an air conditioner used for air conditioning in a vehicle (hereinafter, referred to as a “bent duct”) has a non-uniform ventilation at the bent portion and generates drift and wind noise. In addition, a separating plate is provided at the bent portion for the purpose of reducing the number of the bent portions. The separation plate reduces the unevenness of the air sent from the air conditioner at the bent portion, so that the air flow from the outlet (for example, a register) reduces the drift and reduces the wind noise. And the passengers have a comfortable interior space.
For example, one of the following shapes is mainly used for the bent duct, which will be described with reference to FIGS.
(1) First, the bent duct 30 shown in FIG. 10 will be described. FIG. 10A is a perspective view of a bent duct having a square cross section, and FIG.
At the center of the bent portion of the bent duct 30, a separation plate 31 is formed integrally with a protrusion that is bent in the flow path direction and protrudes from the side wall toward the other side wall to approximately half of the cross-sectional diameter. . The separation plate 31 divides approximately half of the cross-sectional diameter into the upper channel 35 and the lower channel 36 so that the fluid flows. Hereinafter, the shape of the bent duct 30 will be described as “a shape”.
(2) Next, the bent duct 40 shown in FIG. 11 will be described. FIG. 11A is a perspective view of a bent duct having a square cross section, and FIG. 11B is a cross-sectional view of BB.
In the center of the bent portion of the bent duct 40, a crescent-shaped insertion hole 43 is formed in one side wall by bending in the flow channel direction. Further, the separating plate 41 is configured by a crescent-shaped separating plate 41 which can be inserted from the insertion hole 43 and extends to approximately half the diameter of the duct, and a flange 44 provided at an end of the separating plate 41. is there. When the separation plate 41 is inserted through the insertion hole 43, approximately half of the cross-sectional diameter is divided into the upper flow path 45 and the lower flow path 46, so that the fluid flows. Hereinafter, the shape of the bent duct 40 will be described as “b shape”.
(3) Further, the bent duct 50 shown in FIG. 12 will be described. FIG. 12A is a perspective view of a bent duct having a square cross section, and FIG. 12B is a cross-sectional view taken along line CC.
The bent duct 50 is configured to assemble bent duct members 50a and 50b that are divided in advance so as to be symmetrical with respect to the flow path direction. A separation plate 51 is formed integrally with a projection projecting from the inner surface of the side wall of the bent duct member 50b toward the inner surface of the side wall of the other bent duct member 50a to approximately half the cross-sectional diameter. The separation plate 51 divides approximately half of the cross-sectional diameter into the upper channel 55 and the lower channel 56 so that the fluid flows. Hereinafter, the shape of the bent duct 50 will be described as “c shape”.
As described above, in the bent ducts 30, 40, and 50 described in the above (1) to (3), only approximately half of the bent portion in the bent portion is formed by the upper channels 35, 45, and 55 by the separation plates 31, 41, and 51. And the lower ducts 36, 46, and 56 are separated into bent ducts (not shown) without the separation plates 31, 41, and 51. Have been. Although the separation plates 31, 41, and 51 have been shown to protrude to approximately half the cross-sectional diameter, even if they protrude to cross the cross-sectional diameter, the non-uniform ventilation is similarly improved.
[0003]
Note that the shapes of the bent ducts 30, 40, and 50 described in (1) to (3) described above are more general than ever, and thus no prior art document is described.
[0004]
[Problems to be solved by the invention]
However, the conventional bent ducts 30, 40, and 50 have the following problems.
(1) In the “a shape” described above, since the separation plate 31 is formed by pressing the outer surface of the side wall of the bent duct 30, the separation plate 31 becomes too thick (see FIG. 10B), and Pressure loss and wind noise have also been reduced, but are still insufficient.
(2) In the “b shape” described above, the insertion hole 43 is closed by the flange 44, but there is a fear of ventilation leakage. Further, a drilling step for forming the insertion hole 43 is required, and the number of steps in the manufacturing process of the bent duct 40 increases. In addition, pressure loss and wind noise during ventilation are reduced, but are still insufficient.
(3) The above-mentioned "c-shape" requires an assembling step (for example, welding or the like) of the bent duct members 50a and 50b, and also requires an adhesive property so as to prevent air leakage from the assembling location. Although the number of steps in the manufacturing process of the bent duct 50 has been increased and the pressure loss and wind noise during ventilation have been reduced, they are still insufficient.
The present invention has been made in view of such a point, and in a bent duct having a bent portion formed between an inlet portion and an outlet portion, pressure loss at the time of ventilation is small, and wind noise is generated at the outlet portion. It is an object of the present invention to provide a bent duct that can easily form a separation plate with reduced number.
[0005]
[Means for Solving the Problems]
As a means for solving the above problems, a first invention of the present invention is a bent duct as described in claim 1.
When the bent duct according to claim 1 is used, a separator capable of forming a plurality of passages is installed inside the bent duct from the inlet to the outlet, so that pressure loss during ventilation can be easily achieved, and Wind noise at the exit can be reduced.
[0006]
A second aspect of the present invention is a bent duct as described in claim 2.
If the bent duct according to claim 2 is used, a cutout portion is provided at each of the inlet portion and the outlet portion, and a part of the separation body can be fitted and fixed to the cutout portion.
Accordingly, since a part of the separator can be fitted into the cutouts of the inlet and the outlet, respectively, and fixed at that position, the separator does not come off or deviate from the inside of the bent duct.
[0007]
A third invention of the present invention is a method for manufacturing a bent duct as described in claim 3.
According to a third aspect of the present invention, there is provided a method of manufacturing a bent duct, comprising the steps of manufacturing a bent duct and manufacturing a separator. Thus, the manufactured separator can be inserted from one of the entrance and the exit of the manufactured bent duct. This makes it possible to manufacture a bent duct in which the separator is easily mounted in the bent duct.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall perspective view of an embodiment in which a bent duct 10 of the present invention is applied to a ventilation duct from an air conditioner 60 used for indoor air conditioning of an automobile. In addition, the bent duct 10 generally has various shapes such as a cylindrical shape and a rectangular cylindrical shape. In the present embodiment, a rectangular cylindrical shape will be described as an example.
[0009]
With reference to FIGS. 2A and 2B, a description will be given of a bent duct 10 having a bent portion between an inlet 11 and an outlet 12, and through which a fluid flows. In the bent duct 10, an inlet portion 11 and an outlet portion 12 are changed in position by 90 degrees to form a flow passage having a square cross section. The flow path is provided with a partition wall 16 so as to have the same opening, and is divided into a right flow path 14 and a left flow path 15. Flanges 11a and 12a are attached to the inlet 11 and the outlet 12, respectively. The inlet 11 is connected to the air conditioner 60, and the outlet 12 is connected to the outlet 61 by the bolts 17 via the flanges 11a and 12a. . In addition, the inlet 11 and the outlet 12 of the partition wall 16 have an end of a slit 22 formed in the separator 20 described later, and a concave inlet notch 11c into which the cross-sectional shape of the band 23a fits, and An outlet notch 12c is formed.
[0010]
Next, the separator 20 to be inserted into the bent duct 10 will be described with reference to FIG. The separator 20 is formed by bending a rectangular thin plate so that the right flow path 14 and the left flow path 15 of the bent duct 10 can be divided into an upper flow path and a lower flow path, respectively, so as to fit in a bent shape. A slit 22 having a closed end at the other end that can be fitted to the partition wall 16 and an open end at the end is formed. By inserting the separator 20 into the bent duct 10, the flow path in the bent duct 10 is divided into the same height in the vertical direction, and the upper right flow path 14a, the upper left flow path 15a, the lower right flow path 14b, the lower left flow path A path 15b is formed. Further, plate-like fixed bodies 23c and 23e are attached to both ends of the outlet portion 12 of the slit 22. A bendable and flexible band 23a having an opening 23b formed at one end is fixed to one of the fixed bodies 23c, and the band 23a is formed outside the other fixed body 23e (opposite the slit side). A band projection 23d is formed to fit the opening 23b.
[0011]
Next, a method of inserting the separator 20 into the bent duct 10 and assembling the same will be described with reference to FIGS. The bent duct 10 and the separated body 20 are manufactured in advance in separate steps. First, as shown in FIG. 4, the side having the band 23 a of the separator 20 is inserted into the bent duct 10 from the inlet 11, and the slit 22 is fitted to the partition wall 16 while the slit 22 is fitted to the outlet 12. 5, the ends of the slits 22 and the ends of the inlet notches 11 c are fitted together as shown in FIG. 5. Next, in a state where the fitting is maintained, the band 23a of the separator 20 emerging from the outlet portion 12 is gripped as shown in FIGS. After the alignment is made so that the notch 23a and the outlet notch 12c can be fitted, the band opening 23b formed in the band 23a is fitted to the band projection 23d to support the separator 20 inside the bent duct 10. , Fix.
As described above, the separated body 20 having a different structure from the bent duct 10 can be easily supported and fixed inside the bent duct 10.
[0012]
In addition, as described above, the separation body 20 and the bent duct 10 are manufactured in separate processes, and thereafter, the separation body 20 is inserted into the bent duct 10 to assemble the separation body 20. 20 can be inserted, and the shape of the separation plate 21 of the separation body 20 can be easily changed.
[0013]
Next, Table 1 shows the results of a comparison experiment of wind noise and pressure loss between the bent duct 10 of the present embodiment and the conventional bent duct 30.
[0014]
[Table 1]

As shown in the above table, in the present embodiment, the pressure loss of the bent duct is smaller than that of the conventional example, and the wind noise at the outlet of the bent duct is also lower.
[0015]
Also, as shown in FIG. 9, even when the bent duct 10 is bent three-dimensionally, the separation plate 21 of the separator 20 inserted therein is formed into a twisted shape so as to be able to cope with the bent of the bent duct 10. Configurable.
[0016]
In addition, although the example in which the separation plate 21 of the separation body 20 described in the present embodiment is manufactured in a shape bent in advance so as to be able to correspond to the bending of the bent duct 10 has been described, the present invention is not limited to this. Alternatively, it may be made of a non-bent flat plate shape and a bendable member that bends and inserts the flat plate when inserted into the bent duct 10.
In the separator 20 described in the present embodiment, the size of the separation plate 21, for example, the width of the separation plate 21 can be changed as necessary. Then, the number of separation plates 21 and the installation position can be appropriately set according to the cross-sectional shape and the degree of bending of the bent duct 10.
In the meantime, in the bent duct 10 described in the present embodiment, the example of the bent duct 10 forming the partition wall 16 that divides into the right flow path 14, the left flow path 15 and the two flow paths has been described. However, the present invention is not limited to this. For example, the partition wall 16 may not be formed inside the bent duct 10, and a plurality of partition walls 16 that diverge into three or more flow paths may be formed. .
In the meantime, the bent duct 10 described in the present embodiment exemplifies a configuration in which the air conditioner 60 and the air outlet 61 are connected with the bolt 17, but the present invention is not limited to this. For example, a urethane seal (see FIG. , No sign). In this case, for example, the outlet of the air conditioner 60 can be fitted to the flange 11a of the bent duct 10. Then, a sealing material (for example, urethane seal) is wrapped around the entire periphery of the outlet of the air conditioner 60, and the outlet of the air conditioner 60 in which the sealing material is wound around the flange 11a of the bent duct 10 is fitted and connected. Configuration. In addition, the inlet portion of the outlet 61 and the flange 12a of the bent duct 10 have the same configuration, and a description thereof will be omitted.
[0017]
【The invention's effect】
As described above, if the bent duct 10 according to any one of claims 1 to 2 is used, the pressure loss at the time of ventilation is small, the wind noise is small at the outlet portion 12, and the separation plate 21 can be easily formed. The flexible bent duct 10 can be provided. Further, by using the method for manufacturing a bent duct according to the third aspect, the bent duct 10 which has a small pressure loss at the time of ventilation, has a small wind noise at its outlet 12 and can easily form the separation plate 21 is manufactured. be able to.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of an embodiment in which a bent duct 10 of the present invention is applied to a ventilation bent duct from an air conditioner used for indoor air conditioning of an automobile.
FIGS. 2A and 2B are diagrams illustrating an inlet 11 of a bent duct 10 and an outlet 12 of a bent duct 10;
FIG. 3 is a diagram illustrating a separator 20.
FIG. 4 is a diagram illustrating a state before a separator 20 is inserted into a bent duct 10.
FIG. 5 is a diagram illustrating an inlet 11 after a separator 20 has been inserted into a bent duct 10.
FIG. 6 is a diagram illustrating a state in which the band 23a is not bent at the outlet 12 after the separator 20 is inserted into the bent duct 10.
FIG. 7 is a diagram illustrating a state in which the band 23a is bent into an L-shape (90 degrees) at the outlet 12 after the separator 20 has been inserted into the bent duct 10.
FIG. 8 is a diagram illustrating a state in which the band 23a is bent into a U-shape (180 degrees) at the outlet 12 after the separator 20 has been inserted into the bent duct 10.
FIG. 9 is a diagram illustrating a state in which a separating plate 21 is inserted into a bent duct 10 that is bent three-dimensionally.
FIG. 10 is a diagram illustrating a perspective view (a) of a conventional “a-shaped” bent duct 30 and a cross-sectional view (b) taken along line A-A of (a).
FIG. 11 is a diagram illustrating a perspective view (a) of a conventional “b-shaped” bent duct 40 and a cross-sectional view (b) of FIG.
FIG. 12 is a diagram illustrating a perspective view (a) of a conventional “c-shaped” bent duct 50 and a cross-sectional view (b) of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Bent duct 11 Inlet part 12 Outlet part 20 Separator 21 Separation plate

Claims (3)

A bent duct forming a bent portion between an inlet portion and an outlet portion,
Attaching the separator capable of forming a plurality of passages in the bent duct, from the inlet to the outlet.
A bent duct characterized by the fact that: The bent duct according to claim 1,
The inlet portion, and the outlet portion, each has a notch,
A part of the separation body is fitted and fixed in the notch,
A bent duct characterized by the fact that: The bent duct according to any one of claims 1 and 2,
A step of manufacturing a bent duct and a step of manufacturing a separation body,
From one of the entrance portion or the exit portion of the manufactured bent duct, insert the separation body and attach the inside of the bent duct,
A method for manufacturing a bent duct.

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