JPH07127898A - Joint for air conditioning duct - Google Patents

Abstract

PURPOSE:To provide a joint which eliminates a heat insulation for preventing complicated condensation in a site, simplifies a retaining connector for an air conditioning duct and obviates an operation of preventing leakage of the air from the duct. CONSTITUTION:A joint (e.g. a cheese 5) for an air conditioning duct has a shape in which uneven parts (a), (b) are connected by a peripheral wall in an axial direction, and comprises a connecting part (e) to be connected to the parts (a), (b) and formed on a duct connecting surface, and a heat insulation layer (f) processed by flocked insulation on a surface in contact with the duct.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning duct joint.

[0002]

2. Description of the Related Art For example, in duct construction of an air conditioning equipment to be installed in a ceiling space for an office building or the like, first, a ductworker installs an air conditioning duct on an elbow, cheese or reducer on a stepladder or rolling tower scaffold. While connecting with various joints such as, it is suspended on the floor slab on the upper floor, and then the heat insulation worker performs heat insulation work and heat insulation work to prevent dew condensation.

By the way, in recent years, instead of designing and manufacturing an air-conditioning duct made of sheet metal according to the scale of the air-conditioning equipment and constructing it, a configuration in which spiral irregularities are connected to the peripheral wall in the axial direction, or There is a tendency to use a lightweight, inexpensive, and high-rigidity ready-made air-conditioning duct, which has a structure in which independent annular concavo-convex portions are connected to the peripheral wall in the axial direction, and to connect them with a joint.

To connect the air conditioning ducts to various joints, the duct ends are inserted into the joints, and both are secured with screws to prevent them from coming off. Adhesive tapes for ducts for preventing air leakage are attached to the inserted portions. It is done by getting involved. On the other hand, the heat insulation work of the air conditioning duct including the joint is
Generally, it is performed by winding glass wool with aluminum foil as a heat insulating material.

[0005]

However, in addition to the work of fixing screws to prevent coming off and the work of preventing air leakage that is performed in addition to this, it is troublesome, and the metal fittings for fittings to the floor slabs are also required. The heat insulation work around the hanging metal of the joint is likely to become incomplete, and as a result, accidents often occur that cause dew condensation on the outer surface of the joint.

Further, each of the duct work and the heat insulation work is an upward work of an unreasonable posture at a high place, and there is a problem that performing this work for a long time easily causes a safety problem. It was

In view of such actual circumstances, the present invention uses the rational technique to perform the work of heat insulation for the troublesome joint in the field and the work of preventing the air leakage of the joint insertion portion for the air conditioning duct. The present invention provides an air conditioning duct joint.

[0008]

The technical means taken by the present invention to achieve the above object are as follows. That is, the joint according to the present invention is intended for an air conditioning duct having a shape in which the peripheral wall connects the uneven portions in the axial direction, and the duct connecting surface portion is formed with an engaging portion that engages with the uneven portion of the air conditioning duct. In addition, it is characterized in that the surface portion in contact with the air conditioning duct is subjected to flocking heat insulation treatment.

[0009]

According to the above construction, since the joint itself is heat-insulated in advance, troublesome heat-insulating work for the joint in the field is unnecessary, and moreover, the surface portion which contacts the air conditioning duct is specified and the surface portion is fixed. By adopting the heat-insulating form for flocking and heat-insulating, this flocking heat-insulating layer exerts a sealing function between the air-conditioning duct and the joint, and therefore work for preventing air leakage at the joint insertion portion for the air-conditioning duct is also unnecessary.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a duct unit 1 of a terminal in an air conditioning facility having a wide range of duct systems, which is divided so as to correspond to a plurality of zones.

This duct unit 1 is manufactured in advance in a factory, transported and carried in to the construction site of the air conditioning equipment, and suspended and held on the floor slab on the upper floor. As shown in FIG. The cheese 3 for the branch duct 2 of the duct unit 1a branched from the duct unit 1 is provided on the upstream side of the main duct 4, and on the downstream side of the main duct 4 for the conditioned air outlet 6 via the cheese 5. It is formed by connecting branch ducts 7.

The main duct 4 has a straight tubular air-conditioning duct 4a connected to the upstream duct unit 1b through a socket 8 and a bend having a predetermined portion bent at 90 degrees to have an elbow function section 9. The tubular air-conditioning duct 4b,
It is connected via a reducer 10, and a blind cap 11 is provided at the end of the air conditioning duct 4b.

As shown in FIGS. 4 and 6, each of the ducts 4a and 4b and the branch duct 7 constituting the main duct 4 is
The same applies to the branch duct 2 of the branch duct unit 1a,
It has a flexible and expandable / contractible spiral structure in which the peripheral wall connects the concave and convex portions a and b in the axial direction, and is made of metal such as aluminum or iron. The heat insulating layer c is attached.

This heat insulation layer c is formed by so-called flocking heat insulation treatment in which short carbon fibers are adhered to the outer surface of the duct with an adhesive, and the flexibility and stretchability of the ducts 4a, 4b, 7 are not impaired. It is like this. still,
The duct unit 1 shown in FIGS. 1 and 2 shows a factory manufactured state in which the flexible ducts 4a, 4b, and 7 are stretched to the specified dimensions and are connected to each other based on the design dimensions.

Next, cheeses 3 and 5 are the same in construction although they have different duct diameters to be attached. A concrete structure of the cheese 5 on the downstream side of the duct will be described with reference to FIGS. 3 and 4. The cheese 5 has a branch duct d in a branch hole d formed laterally at a predetermined position of the duct 4b. 7 are connected to each other and are made of metal such as iron.

Specifically, a pair of semi-cylindrical members 12, 12 for holding the duct 4b from both the left and right sides is provided with a flange 14 for the tightening means 13 for holding the duct, and is communicated with the branch hole d. The cylindrical branch duct connecting member 15 is continuously connected to the one semi-cylindrical member 12, and the ducts 4a, 4b, 7 are provided on the duct connecting surface portions of the semi-cylindrical members 12, 12 and the branch duct connecting member 15, respectively. Of the semi-cylindrical member 12,
Each of the inner surface of 12 and the inner and outer surfaces of the branch duct connecting member 15 is provided with a heat insulating layer f for heat retention and dew condensation prevention by the above-mentioned flocking heat insulating treatment.

The branch duct connecting member 15 has an engaging portion e.
Is formed by processing the end portion of the branch duct 7 as flat as possible when connecting the branch duct 7 to the branch duct connecting member 15, but the uneven portion a,
Since b is slightly left, the engaging portion e is formed in the branch duct connecting member 15 so as to engage with the uneven portions a and b.

According to this structure, the branch duct connecting member 15
Is aligned with the branch hole d, and the engaging portions e of the semi-cylindrical members 12, 12 are engaged with the concave-convex portions a, b of the ducts 4 a, 4 b, and the pair of semi-cylindrical members are provided via the tightening means 13. While holding the duct 4b between the member-shaped members 12, 12,
The branch duct 7 is screwed and connected to the branch duct connecting member 15 so as to engage the engaging portions e with the concave and convex portions a and b, and the branch duct 7 is tightened with the metal band 16 to form the duct 4b. As a result, the branch connection of the branch duct 7 to the downstream side of the main duct 4 is achieved in a retaining state.

As is apparent from the enlarged view of a portion taken out in FIG. 4, the heat insulation layer f attached to the outer surface of the branch duct connecting member 15 in order to keep the heat and prevent dew condensation is the same as the branch duct connecting member 15. It functions as a sealant between the branch duct 7 and the heat insulating layer c attached to the outer surface of the main duct 4 and the inner surface of the semi-cylindrical members 12, 12 with respect to the main duct 4.
f is pinched so that the short fibers thereof mesh with each other, so that the main duct 4 and the semi-cylindrical members 12, 12 are
Between them and, a two-layer seal is provided by the heat insulating layers c and f.

The heat insulating layer f is also provided on the inner surface of the branch duct connecting member 15 to prevent the formation of a cold bridge extending over the inner and outer surfaces of the cheese 5, for example, branch duct connecting. The heat insulating layer f on the outer surface of the member 15 is formed by the semi-cylindrical member 1
The heat insulating layer f is pushed out to the 2 side and the semi-cylindrical member 12
If the heat insulating layer f on the inner surface is polymerized so that a short-path cold bridge is not formed over the inner and outer surfaces of the cheese 5, the heat insulating layer f on the inner surface of the branch duct connecting member 15 may be omitted. Is also possible.

Next, the reducer 1 will be described with reference to FIGS.
The structure of the reducer 1 will be described below.
No. 0 is also made of metal such as iron, and its outer surface is provided with a heat insulating layer i for heat retention and dew condensation prevention by the above-mentioned flocking heat insulating treatment, depending on the branch amount of conditioned air by the cheese 3 on the upstream side of the duct. The funnel-shaped portion 10a is formed so that the cross-sectional area thereof is reduced toward the downstream side, and the duct insertion ports 10b and 10c are connected to the upstream side and the downstream side of the funnel-shaped portion 10a.

Then, in the same manner as the connection of the branch duct 7 to the branch duct connecting member 15, the concave and convex portions a and b slightly left at the end portions of the ducts 4a and 4b are respectively attached to the insertion ports 10b and 10c. Engaging portions j that engage with each other are formed on the insertion ports 10b and 10c.

Even in such a structure, the insertion port 10
The ducts 4a and 4b are screwed into and connected to b and 10c, and the ducts 4a and 4b are tightened with the metal band 17 to achieve the connection between the ducts 4a and 4b in a retaining state. As is clear by taking out the part and enlarging it, the heat insulating layer i attached to the outer surface of the branch duct connecting member 15 for keeping heat and preventing dew condensation is the sealing material between the ducts 4a, 4b and the reducer 10. Function as.

As shown in FIGS. 7 and 8, the blind cap 11
Is structurally the same as the above-described reducer 10 except that it includes a lid member 18 for closing the flow path, the same components including the metal band 17 for tightening are given the same reference numerals, and the details thereof will be described. The description will be omitted.

It is to be noted that the reducer 10 is provided with an upward bracket 19 in series, and the bracket 19 and the cheese 5 are connected together.
Each of the flange 14 and the duct tightening metal band 17 of the blind cap 11 is formed with a locking hole h for locking the unit suspending tool 20 to the floor slab on the upper floor.

The duct unit 1 of the present invention used for construction of the air conditioning equipment is constructed as described above, and for example, as shown in FIG.
As shown in FIG. 2, the main duct 4 is bent into a loop shape or a half-folded state, and the branch duct 7 is bent along the main duct 4 so that the shape of the duct unit 1 can be adjusted appropriately with a wire or the like to construct the duct unit 1. Truck transportation to the site and delivery to the construction site can be done without difficulty.

Alternatively, as shown in FIG. 10, the duct 4
The elbow function part 9 of b is bent back as necessary to shrink the ducts 4a, 4b, 7 and, although not shown, the contracted duct unit 1 can be shaped into a loop, for example. Thus, the duct unit 1 can be easily transported or carried into the construction site.

Then, while returning the duct unit 1 carried into the construction site to the actual construction shape shown in FIG. 1, it is simply suspended by the suspension bolts 20 and held on the floor slab on the upper floor. Thus, an air-conditioning duct that is heat-insulated for each unit can be obtained.

Therefore, after that, the main duct 4 and the cheese 3 of the duct unit 1 and the branch duct 7 are similarly hung and held on the floor slab of the upper floor, and the branch duct unit 1a and the duct on the upstream side. By connecting the unit 1b and the air outlet 6 installed on the ceiling, and further connecting the main ducts of the duct units sequentially connected to the upstream side to the air conditioner, the air conditioning equipment of a predetermined scale is constructed. It

At the time of this connection, since the main duct 4 and the branch duct 7 are respectively flexible, there is an error in the installation position of the duct unit 1b on the upstream side, the air outlet 17, etc., and the hanging position of the duct unit 1. Even if there is, this error can be absorbed and connection can be made without difficulty.

In summary, according to the above-mentioned construction means, since the duct unit 1 is manufactured in a state in which the heat insulation treatment has been completed, it is possible to perform the heat insulation treatment completely in every corner without any trouble at this stage. The occurrence of condensation accidents is reliably prevented.

In addition to eliminating the need for any on-site heat insulation work, the duct unit 1 that has already undergone duct work is simply hung and held on the floor slab on the upper floor. Work can be accomplished in a short time by work in one industry, and safety can be improved by being freed from work in an unreasonable posture at high places.

As a branching form of the duct, the branch duct 7 is branched and connected to the main duct 4 via the T-shaped cheese 5, but the cheese 5 is replaced with a Y-shaped cheese. It is feasible. Alternatively, it is possible to replace the cheese 5 with a cross-shaped so-called cross, and to change into a form in which two branch ducts 7 are branched and connected. This cross is connected to each of the semi-cylindrical members 12, 12 by the branch duct connecting member 1
It can be simply constructed by connecting 5 in series, and in the present invention, these are collectively referred to as a joint.

Further, the structure of each air conditioning duct 4a, 4b, 7 is such that the uneven portions a, b are connected in a spiral, but like the cheese 5 described above, the joint is divided into two parts to hold the air conditioning duct. In the case of the configuration, the present invention can be implemented for an air conditioning duct having a configuration in which independent annular irregular portions are connected in the axial direction.

Further, in the above-mentioned embodiment, the surface portions of the cheese 5, the reducer 10 and the blind cap 11 which are in contact with the air-conditioning ducts are subjected to flocking heat insulation treatment, and the ducts 4a, 4
Although the description has been given of the form in which the bristles are heat-insulated on the outer surfaces of b and 7, it is difficult to apply the heat insulation to the joint (cheese 5, reducer 10 and blind cap 11) to which the unit suspender for the floor slab is attached. However, the heat insulation process for the ducts 4a, 4b, 7 is not so difficult.

From this fact, the ducts 1a, 4b, 7 which are not subjected to the heat insulation treatment are connected to each other by the joints for which the flocking heat treatment is applied to form the duct unit 1, and the duct unit 1 is arranged on the upper floor. Even if the ducts 4a, 4b, 7 are heat-insulated by well-known means before or after being suspended and retained on the floor slab 8, no troublesome on-site insulation work is required for the joints. Therefore, it is possible to construct the air conditioning equipment more safely and in a shorter construction period than the conventional one.

Further, although the duct 4b is provided with the elbow function portion 9 by bending by utilizing the flexible function of the duct itself, it is also possible to use the same elbow connection configuration as the reducer 10 structurally.

[0038]

As described above, according to the present invention, since the joint itself is preliminarily subjected to the heat insulation treatment, the heat insulation work for the particularly troublesome joint on the site is completely unnecessary, which makes it impossible to perform the operation on the site. By significantly reducing the work at high altitude, the air conditioning equipment can be constructed safely and in a short construction period.

Moreover, since the surface portion in contact with the air conditioning duct is specified and the surface portion is heat-insulated by flocking,
This flocked heat insulation layer can also have a sealing function between the air conditioning duct and the joint, so that the work of preventing air leakage at the joint insertion portion of the air conditioning duct is also unnecessary. Since the engaging portion that engages with the uneven portion is formed on the duct connecting surface portion of the joint by making good use of the uneven portion, the connection for preventing the duct from coming out of the joint can be made more secure than the conventional screw fastening means. It was achieved easily.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a duct unit of a terminal in which a duct system covering a wide range is divided so as to correspond to a plurality of zones.

FIG. 2 is a plan view of a duct unit.

FIG. 3 is an exploded perspective view of cheese.

FIG. 4 is a cross-sectional plan view of the cheese with a part taken out and enlarged.

FIG. 5 is a perspective view showing a connecting portion of the reducer.

FIG. 6 is a vertical cross-sectional side view of a reducer with a part taken out and enlarged.

FIG. 7 is a perspective view showing a connecting portion of a blind cap.

FIG. 8 is a vertical side view of the blind cap.

FIG. 9 is a perspective view showing a state in which the duct unit is shaped into a loop.

FIG. 10 is a plan view showing a state in which each duct of the duct unit is contracted.

[Explanation of Codes] 4a, 4b, 7 ... Air-conditioning duct, e, j ... Engaging portion, f, i
... Flocking insulation treatment.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Taiwa Okubo 4-1-1-13 Honcho, Chuo-ku, Osaka City Stock company Takenaka Corporation Osaka Main Store (72) Inventor Toshiki Nishi 4-chome, Honmachi, Chuo-ku, Osaka No. 13 Stock Company Takenaka Corporation Osaka Main Store

Claims (1)

[Claims] 1. A joint for an air-conditioning duct having a peripheral wall in which the concavo-convex portions are connected in the axial direction, wherein an engaging portion that engages with the concavo-convex portion of the air-conditioning duct is formed on the duct connecting surface portion,
A joint for an air-conditioning duct, characterized in that the surface portion in contact with the air-conditioning duct is heat-treated for flocking.