JP3044210B2 - Duct 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 two-pipe duct, and more particularly to a two-pipe duct suitably used for air conditioning equipment.

[0002]

2. Description of the Related Art As ducts for air conditioning equipment, cylindrical or rectangular air conditioning ducts made of a metal such as a galvanized steel sheet or a noncombustible material are widely used. There are air-conditioning ducts, for example, those that allow cool air to pass through and those that allow warm air to pass, and such two cylindrical ducts are arranged in parallel.

[0003]

When ducting an air-conditioning duct, holes for passing the air-conditioning duct are formed in beams of a building. It is preferable that the number of the holes is small in terms of work and maintenance of the strength of the beam. However, when arranging two ducts in parallel, it is necessary to provide holes for the beams. Then, the strength of the beam is also likely to decrease.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and can compactly and neatly arrange a duct space, can reduce the number of holes in a beam of a building, and has good workability. It is intended to provide an air conditioning duct.

[0005]

[Means for Solving the Problems] (1) Galvanized steel
For sheet, stainless steel sheet and other metal materials or non-combustible materials
It is more configurations, and along the longitudinal direction consist duct pair having a conformable opposing surface to each other, wherein the opposing face to face bonded via the heat insulating material of the duct, and before
The heat insulating material is fibrous, and the direction of the fiber is on the facing surface portion.
This is a two-pipe duct formed to be substantially perpendicular to the duct. The opposing surface portions can be aligned along the longitudinal direction of the duct, that is, the direction in which air flows, and are formed so as to face each other with a predetermined interval. The facing surface of the duct
It may be constituted by a single flat plate portion, a plurality of flat plate portions or a curved surface portion. In addition, the cross section of the duct (cross section in the radial direction of the duct) may be configured as a rectangular duct or a rectangular duct in addition to a semicircular shape.

[Operation] A pair of ducts having opposing surface portions that can be aligned with each other along the longitudinal direction are formed, and the opposing surface portions of the ducts are joined to face each other. Since the ducts are provided with two conduits that are independent flow paths and are joined via a heat insulating material, heat transfer between the ducts is prevented.

In addition, the heat insulating material is made of a fibrous material.
Direction is substantially perpendicular to the facing surface portion.
To bring the opposing surfaces of the duct closer together from outside
Even under such a load, deformation such as crushing due to compression may occur.
It is difficult to reduce heat insulation performance.

(2) The duct includes the opposing surface portion,
The two-pipe duct according to (1), comprising a peripheral wall portion connected to the facing surface portion, wherein the peripheral wall portion has a curved surface portion facing the facing surface portion. For example, there is a case where a curved surface portion facing the facing surface portion is formed in an arc shape such as an arc shape bulging outward, and the peripheral wall portion has a C shape or a U shape. A duct in which the cross section (cross section in the radial direction of the duct) is substantially semicircular is one of preferred embodiments.

[Operation] The duct has an opposing surface portion and a peripheral wall portion connected to the opposing surface portion, and the peripheral wall portion has a curved surface portion opposing the opposing surface portion. By using a pair of ducts having excellent rigidity and a substantially semicircular cross section, a compact two-pipe duct having a cylindrical shape as a whole can be obtained.

In the above-mentioned two-pipe duct, it is preferable that a bent portion (toward the outside of the duct) is formed at an edge of the facing surface portion of the duct .

By forming a bent portion at the edge of the facing surface portion of the duct, the rigidity of the facing surface portion and hence the duct is enhanced, and the shape is maintained.

Further, preferably the one formed by coating the periphery of said double-lumen duct with a heat insulating material.

[0013] With those formed by coating the periphery of the secondary conduit duct with a heat insulating material, heat-insulating insulation work covering a duct with a heat insulating material is not necessary in the construction site.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following embodiments, and may be appropriately modified within the scope of the present invention. Can be implemented.

FIG. 1 is a partially cutaway perspective view of a two-pipe duct 1 showing an embodiment of the present invention, FIG. 2 is a plan view schematically illustrating the shape of the duct 11, and FIG. FIG. 4 is a plan view schematically showing an example of a seam of a part, and FIG. 4 is a perspective view showing a bent part 14 formed at an edge of the facing surface part 13 of the duct 11.

As shown in FIG. 1, the two-pipe duct 1 comprises a pair of ducts 11 having opposing surfaces 13 which can be aligned with each other along the longitudinal direction.
The three are joined via a heat insulating material 21.

The duct 11 is made of a galvanized steel sheet used for a normal duct having a thickness of about 0.5 to 1.6 mm,
It is composed of stainless steel sheet or other metal materials or non-combustible materials. When the duct 11 is made of a metal material, the inside of the duct 11 can be cleaned without any trouble.

The duct 11 has a flat plate-shaped opposing surface portion 13.
And a peripheral wall portion 17 having a curved surface portion 15 connected to the opposed surface portion 13 and opposed to the opposed surface portion 13. In the illustrated example, the curved surface portion 15 is formed in an arc shape bulging outward, As a whole, the peripheral wall portion 17 has an arc shape, and the duct 11
Has a semicircular cross section.

Another example of the peripheral wall 17 of the duct 11 is shown in FIG. FIG. 2A shows an example in which the peripheral wall portion 17 is formed in an oval arc shape, and FIG. 2B shows an example in which the peripheral wall portion 17 is formed in a U shape.

An example of a connecting portion between the facing surface portion 13 and the peripheral wall portion 17 in the duct 11 will be described with reference to FIG. FIG.
FIG. 4 is a plan view schematically showing an example of a seam of a corner of a duct 11. 3 (a) and 3 (b) show an example of a crimped fold, and FIG. 3 (c) shows an example of a weld (including spot welding). A caulking material is usually applied to the bent portion.

FIGS. 3 (b) and 3 (c) show that the outer surface of the nipple (pipe joint) does not have a complicated shape, is easily connected by the nipple, and the air from the nipple to be inserted. It has the advantage that no leakage can occur.

As is clear from FIGS.
A bent portion 14 is formed at the longitudinal edge of the outer surface of the duct 11 toward the outside of the duct 11, whereby the rigidity of the facing surface portion 13 and thus the duct 11 is enhanced, and the shape is maintained. . The width of the bent portion 14 is usually about 5 to 10 mm. The angle of the bending is not particularly limited, but is usually 90 to 180 °.

The pair of ducts 11 are preferably made of the same shape. By having the same shape, one two-pipe duct can be manufactured by combining two same objects, which is advantageous in design and manufacture. In some cases, different sizes may be used.

A pair of ducts 11 are joined via a heat insulating material 21 with their facing surfaces 13 facing each other. Normally, each surface of the heat insulating material 21 and each surface of the opposing surface portion 13 may be bonded with an adhesive or fixed using a fixing member such as a pin, a rivet, or a stud.

The heat insulating material 21 is a fibrous material, preferably non-combustible, and glass wool is suitably used. Rock wool, ceramic wool or other materials may be used. The thickness of the heat insulating material 21 is usually about 10 to 50 mm, but is appropriately selected as needed and is not particularly limited. In the case of glass wool, the density of the heat insulating material 21 is usually about 24 to 40 kg / m3, but is not limited thereto.

The heat insulating material 21 is formed such that the direction of the fiber is substantially perpendicular to the facing surface 13 as shown in the figure. By doing so, deformation such as crushing due to compression is unlikely to occur even when a load that brings the opposing surface portions of the ducts closer to each other from the outside, and the heat insulation performance is not easily reduced. The direction of the fiber of the heat insulating material 21 is such that the base paper 2
A heat-insulating heat-insulating sheet 25 bonded to the base paper 23 so as to be perpendicular to the three surfaces can be used.

The periphery of the two-pipe duct 1 constructed as described above can be further covered with a heat insulating material 31.
In this case, there is no need to perform heat insulation and heat insulation work for covering the two-pipe duct 1 with a heat insulating material at the construction site. In the illustrated example, a base paper 33 is adhered to the surface of the heat insulating material 31. That is, the heat insulating material 31 is bonded to the base paper 33 so that the direction of the fiber is perpendicular to the surface of the base paper 33 to form the heat insulating and heat retaining sheet 35, and the base paper 33 is on the front side. To cover the two-pipe duct 1. Therefore, even if it receives a load due to suspension or the like, it is hardly deformed, and the heat insulation performance is hardly reduced. Further, when the heat insulating and heat insulating sheet is wound around the duct and covered, the elastic restoring force based on the difference in diameter between the inner and outer peripheries of the rolled sheet is relatively small, and the duct can be easily covered.

The base papers 23 and 33 have 20 to 200
An aluminum foil having a thickness of .mu.m, a single glass cloth of 15 to 100 g / m @ 2, or a composite of the aluminum foil and the glass cloth is preferably used.

Heat insulating material 3 covering the periphery of the two-pipe duct 1
For 1, other than bonding with an adhesive, a known method, for example, a method of welding by applying an electric current using a stud pin may be used. After covering the periphery of the two-pipe duct 1 with the heat insulating material 31, a band or the like may be fastened if necessary.

The overall thickness of the two-pipe duct 1 is usually about 100 to 600 mm in inner diameter, and 900 to 6000 m in length.
Although it is about m, it is appropriately implemented as needed and is not particularly limited.

The two-pipe duct 1 according to the present invention can be used in connection with a duct or the like adapted to each diameter. Further, in addition to the straight circular pipe described in the above embodiment, the present invention can be applied to a straight square pipe or a pipe of another shape, for example, a T pipe, an elbow pipe, a different diameter pipe, or the like.

FIGS. 5 and 6 show an example in which an elbow tube having a circular cross section is used instead of the straight circular tube as shown in FIG. 1 (the same reference numerals are used for members or elements equivalent to those described above). And its description is omitted). The two-pipe duct 1 shown in FIG. 5 includes ducts 11a (11a1, 11a2, 11a3, 11a1, 11a2, 11a3,
11a4) and duct 11b (11b1, 11b2, 11b3,
11b4). That is, duct 1
1a is located inside the bent portion (the shorter distance side), and the duct 11b is located outside the bent portion (the longer distance side), so that the two pipe ducts 1 are formed as a pair. I have.

The duct 11a and the duct 11b are respectively 11a1, 11a to form a bent portion of the elbow pipe.
2,11a3,11a4 and 11b1,11b2,11b3,11
Each part of b4 is connected and integrated by welding or other appropriate means. Duct 11a and duct 11
b has a plurality of flat plate-shaped opposing surface portions 13 and a peripheral wall portion 17 connected to the opposing surface portion 13 and provided with a curved surface portion 15 opposing the opposing surface portion 13. In the illustrated example, the curved surface portion 15 is formed in an arc shape that bulges outward, the peripheral wall portion 17 has an arc shape as a whole,
The cross sections of 1a and the duct 11b have a semicircular shape.

Then, the opposed surface portions 13 of the duct 11a and the duct 11b are opposed to each other, and are joined via a heat insulating material 21 to constitute the two-pipe duct 1 as an elbow pipe. Therefore, the two-pipe duct 1 is formed as an elbow pipe having a circular cross section as a whole. As described above, the heat insulating material 21 can be used as the heat insulating and heat retaining sheet 25 bonded to the base paper 23.

The periphery of the two-pipe duct 1 constructed as described above is further covered with a heat insulating material 31. In the illustrated example, a base paper 33 is adhered to the surface of the heat insulating material 31 similarly to the two-pipe duct 1 of FIG. That is, the heat insulating material 3
Reference numeral 1 denotes a heat insulating sheet 35 which is adhered to the base paper 33 so that the direction of the fibers is perpendicular to the surface of the base paper 33, and the heat insulating sheet 35 is formed such that the base paper 33 faces the front side. The double duct 1 is wound around the duct 1.

The two-pipe duct 1 constructed as an elbow pipe shown in FIG. 6 is different from the case of FIG. 5 in that the ducts 11a and 11b are located vertically along the plane bending direction of the elbow pipe.
It consists of: That is, the duct 11a is located above the bent portion, and the duct 11b is located below the bent portion.
Are formed.

The duct 11a and the duct 11b are different from those of FIG. 5 in that they each have one flat plate-shaped opposing surface portion 13 (the planar shape is shown in FIG. 6B). And a pair of the duct 11a and the duct 1
1b may be formed of the same shape.

Then, the opposed surface portions 13 of the duct 11a and the duct 11b are opposed to each other and joined via a heat insulating material 21 to constitute the two-pipe duct 1 as an elbow pipe. Therefore, the point that the two-pipe duct 1 is formed as an elbow pipe having a circular cross section as a whole is the same as that shown in FIG. Also, the point that the periphery of the two-pipe duct 1 is further covered with a heat insulating material 31 is the same as that shown in FIG.

Although the above-mentioned elbow pipe has a case where the bending angle is 90 °, it is needless to say that the two-pipe duct 1 can be formed as an elbow pipe having a bending angle of 45 °, 60 ° or the like. Absent.

FIG. 7 shows an example in which the tubes are configured as different diameter tubes (reducers). As shown in FIG. 7, the different-diameter pipe is shown in FIG. 1 in that the peripheral wall 17 having the curved surface 15 is composed of a small-diameter pipe A, a constricted section B, and a large-diameter pipe C. It is different from an equal diameter cylindrical tube. In the illustrated example, the curved surface portion 15 includes a peripheral wall portion 17 having a curved surface portion 15 connected to the opposed surface portion 13 and opposed to the opposed surface portion 13.
It is formed in an arc shape bulging outward, and as a whole, the peripheral wall portion 17 is formed.
Is similar to the one shown in FIG. 1 in that the duct 11 has a semicircular cross section.

The two duct ducts 1 are formed as different-diameter pipes, with the opposing surfaces 13 of the ducts 11a and 11b facing each other and joined via a heat insulating material 21. Therefore, the point that the two-pipe duct 1 having a circular cross section as a whole is formed is the same as that shown in FIG. Also,
The point that the periphery of the two-pipe duct 1 is further covered with a heat insulating material 31 is the same as that shown in FIG.

FIG. 8 shows an example in which the duct is formed as a rectangular duct having a rectangular cross section and as an elbow pipe. The two-pipe duct 1 shown in FIG. 8 is composed of ducts 11a and 11b which are vertically located along the bending direction of the elbow pipe when the bending direction is a plane. The pair of ducts 11a and 11b
Each has the same (or symmetric) shape. Further, the duct 11a and the duct 11b are configured to have flat facing surfaces 13, 13, respectively.

Then, the opposed surface portions 13 of the duct 11a and the duct 11b are opposed to each other and joined via a heat insulating material 21 to constitute the two-pipe duct 1 as an elbow pipe. Therefore, the heat insulating material 21 is provided on each of the flat facing surfaces 13.
And the ducts 11 on both sides around the heat insulating material 21.
a and the duct 11b are located, and the overall duct duct 1 is formed as an elbow pipe having a square cross section.

The connecting portions 12, 12 at both ends of the duct 11a and the duct 11b are semicircular, and when they are paired, they are circular so that they can be connected to a tubular duct or the like. Of course, you may comprise as square shape or other shapes. Although not shown, the periphery of the two-pipe duct 1 may be further covered with a heat insulating material 21.

The duct duct 1 shown in FIG. 9 differs from that shown in FIG. 8 in the arrangement of the ducts. When the bending direction of the elbow pipe is a plane, the ducts 11a are located inside and outside along the bending direction. And a duct 11b. That is, the duct 11a is located inside the bent portion (the shorter distance side), and the duct 11b is located outside the bent portion (the longer distance side).
, The two ducts 1 are formed in pairs. Duct 11a and Duct 1
1b is configured to have curved facing surface portions 13, 13 which can be aligned with each other along the longitudinal direction. The facing surfaces 13 of the duct 11a and the duct 11b are
1 are joined.

In the construction of the two-pipe duct,
There may be a case where it is desired to change the positional relationship between the pipes in the two-pipe duct. For example, on the same plane, there is a case where it is desired to change two pipeline ducts in which each pipeline is located on the left and right so that each pipeline is located vertically (or vice versa). FIG. 11 shows a pipeline changing unit 51 applicable in such a case.

In the conduit changing unit 51 shown in FIG. 10, openings A and B of the conduits are arranged on one side of the tubular main body 52 on the left and right sides, and a connecting portion 58 is provided. The openings C and D of the respective conduits are arranged vertically and a connection portion 58 is provided. One opening A at one end and one opening C at the other end communicate in one space within the tubular body, and the other opening B at one end and the other opening D at the other end are tubular. The other space in the main body is in communication with another space in the tubular body, and the other space in the tubular body is separated from the partition wall 5 in the tubular body.
3,55.

In the illustrated example, a rectangular parallelepiped tubular main body has:
A partition wall 53 located in the vertical direction of the tubular body 52 (bridged) and a partition wall 53 located in the lateral direction of the tubular body (bridged)
A partition wall 55 is provided. The partition wall 53 located in the vertical direction separates the left and right openings A and B at one end (left side in the drawing, entrance side) of the tubular main body 52. The partition wall 55 located in the left-right direction separates the upper and lower openings C and D at the other end (right side in the drawing, outlet side) of the tubular main body 52. And the partition wall 53 located in the up-down direction is
A partition wall 55 that extends obliquely from one end to the left side surface (or right side surface) of the tubular body on the other end side and is joined to the inner wall surface of the tubular body, and a partition wall 55 located in the left-right direction is one end from the other end. It extends obliquely toward the bottom of the tubular body on the side of the part and is joined to the inner wall surface of the tubular body. The two partition walls 53 and 55 are joined to each other at an oblique crossing side 57 where the two partition walls 53 and 55 cross.

The partition walls 53 and 55 form one space and another space separated from each other in the tubular main body. One opening A at one end (opening on the right side in the traveling direction) and the other end. Is connected to one opening C (upper opening) in one space in the tubular body, and the other opening B at one end (opening on the left in the traveling direction) and the other opening D at the other end (lower opening). (Opening) communicates with another space in the tubular body.

According to the above configuration, one end is connected to a two-pipe duct in which each pipe is positioned on the left and right, and the other end is connected to a two-pipe duct in which each pipe is positioned vertically. Therefore, two pipe ducts in which each pipe is located on the left and right can be changed so that each pipe is located up and down on the same plane (and vice versa). When piping the road duct, the positional relationship between the pipes can be easily changed.

In the above-mentioned conduit changing unit, it is preferable that the partition walls 53 and 55 be made of the above-mentioned heat insulating material or other materials having heat insulating properties. Further, the shape of the connecting portion may be configured as a square shape or another shape in addition to the circular shape. Further, the tubular body may be covered with a heat insulating material. Although a rectangular parallelepiped tubular body is exemplified, the tubular body is formed into a cylindrical shape, and a partition wall having a twisted flat plate is provided in the tubular body,
It is also possible to configure a conduit changing unit that can change the positional relationship between the conduits of the two conduit ducts connected to both ends of the tubular body.

[0052]

(1) As described above, the present invention provides:
It is composed of a pair of ducts having opposing surfaces, and the two opposing surfaces of the ducts are joined to each other so as to be opposed to each other. In addition, since the ducts are joined via a heat insulating material, generation of heat transfer between the ducts is prevented.
Further, the piping space can be compactly and orderly arranged, the number of openings in the beams of the building can be reduced, and the workability is good. Cleaning and inspection are easy.

Further , the heat insulating material is made of a fibrous material,
Direction is substantially perpendicular to the facing surface portion.
To bring the opposing surfaces of the duct closer together from outside
Even under such a load, deformation such as crushing due to compression may occur.
It is difficult to reduce heat insulation performance.

(2) The duct has an opposing surface portion and a peripheral wall portion connected to the opposing surface portion, and the peripheral wall portion has a curved surface portion opposing the opposing surface portion. By using a pair of ducts that are simple, have excellent rigidity, and have a substantially semicircular cross section, a compact two-pipe duct having a cylindrical shape as a whole can be obtained.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a two-pipe duct 1 showing an embodiment of the present invention.

FIG. 2 is a plan view schematically illustrating the shape of a duct 11. FIG.

FIG. 3 is a plan view schematically showing an example of a joint at a corner of a duct 11;

FIG. 4 is a perspective view showing a bent portion formed at an edge of the facing surface portion of the duct.

FIG. 5 shows an example of a two-pipe duct 1 configured as an elbow pipe having a circular cross section, where (a) is a plan view,
(B) is a plan sectional view, and (c) is an end view taken along line cc in (a).

FIG. 6 shows another example of a two-pipe duct 1 configured as an elbow pipe having a circular cross section, where (a) is a plan view,
(B) is a plan view showing the shape of the facing surface portion 13, and (c) is an end view taken along line cc in (a).

FIGS. 7A and 7B show an example of the two-pipe duct 1 configured as different-diameter pipes, where FIG. 7A is a perspective view and FIG. 7B is a cross-sectional view taken along line cc in FIG.

FIG. 8 is a perspective view showing another example of the two-pipe duct 1 configured as an elbow pipe having a rectangular cross section.

FIG. 9 is a perspective view showing another example of the two-pipe duct 1 configured as an elbow pipe having a rectangular cross section.

FIG. 10 is a perspective view illustrating a pipeline change unit 51 to which two pipeline ducts can be connected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Two duct duct 11 Duct 13 Opposing surface part 14 Bent part 15 Curved surface part 17 Peripheral wall part 21 Insulation material 31 Insulation material

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Toshio Suzuki 2-4 Yotsuya, Shinjuku-ku, Tokyo Shinryo Corporation Co., Ltd. (72) Inventor Kazuhiko Noguchi 1-2-17 Higashi-Shimbashi, Minato-ku, Tokyo Fuji Within Mori Sangyo Co., Ltd. (56) References JP-A-3-251639 (JP, A) JP-A-5-306831 (JP, A) JP-A-63-190851 (JP, U) (58) Fields surveyed ( Int.Cl. ⁷ , DB name) F24F 13/02

Claims (2)

(57) [Claims] 1. Galvanized steel sheet, stainless steel sheet and others
It is composed of a pair of ducts made of a metal material or a non-combustible material and having opposing surface portions that can be aligned with each other along the longitudinal direction , and the opposing surface portions of the ducts are joined to each other via a heat insulating material , and Insulation is fibrous
So that the direction of the fiber is substantially perpendicular to the facing surface
A two-pipe duct formed. 2. The two-pipe conduit according to claim 1, wherein the duct includes the facing surface portion and a peripheral wall portion connected to the facing surface portion, and the peripheral wall portion has a curved surface portion facing the facing surface portion. duct.