JP3071395U - Heat insulation structure of duct - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is to provide a new heat insulation structure for a duct to be factory-shipped with a heat insulation material attached in advance. The present invention is made of a suitable thickness plate having a large number of independent fine holes, flexibility and some elasticity inside and outside the entire surface of the rectangular or cylindrical duct or the cylindrical duct. A duct heat insulating structure, characterized in that a plate-shaped heat insulating material made of a synthetic resin closed-cell foam is attached and the duct is made into a heat insulating duct before shipment from a factory.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 This invention relates to a heat insulating structure for a duct.

[0002]

[Prior art]

 Conventionally, ducts installed in pipes in buildings have been dew-condensed due to the difference in heat retention between the inside and outside, so that heat insulation materials such as glass wool, asbestos, and urethane foam are mainly wrapped around the outside to keep the heat. Although dew condensation is prevented, asbestos has not been used in recent years because of its carcinogenicity, and urethane foam is infrequently used due to poor workability and dirty appearance after work. For this reason, most of the heat insulation of air conditioning ducts is made of glass wool.

[0003]

[Problems to be solved by the invention]

 However, since glass wool has a high moisture absorption, it has a problem that it absorbs a large amount of moisture in the outside air, increases the amount of water in the body, increases thermal conductivity, and tends to reduce the heat insulation effect. Must be covered with a vinyl sheet or aluminum foil, and further over it with a moisture-proof cover such as a wire mesh, iron plate, or highly moisture-resistant cloth. .

Further, since the moisture-proof cover is very fragile, it is not possible to carry out a heat retaining process at the time of shipment from a factory. Therefore, a duct shipped from a factory is provided with a heat insulation structure after being piped to a ceiling or the like in a site room. Working. However, the installation of heat insulators is dangerous due to the work at heights, and uncertain work may occur in narrow spaces such as behind the ceiling.Additionally, it takes a long time to install the heat insulators, which increases the cost of duct piping. There is a problem that they do. In addition, glass wool dust penetrates the skin and causes pruritus and pain, and the results of research have shown that inhaling it can cause health damage to respiratory diseases, harming the health of workers as well as people. There is a problem of danger.

[0005]

[Means for Solving the Problems]

 The present invention is based on a synthetic resin that is formed of a suitable thickness plate with a large number of independent fine holes inside and outside and inside the entire surface of the rectangular or cylindrical duct and cylindrical duct, and with flexibility and some elasticity. This problem is solved by attaching a plate-like heat insulating material made of a closed-cell foam to make the duct a heat insulating duct before shipment from the factory.

[0006]

[Embodiment of the invention]

 1 (a) and 1 (b) show a state in which a plate-shaped heat insulating material 2 made of a synthetic resin-independent foamed foam is adhered and attached to the entire outer periphery of a rectangular cylindrical duct 1 to form a heat insulating duct 3 before shipment from a factory. Is shown. 4 is an adhesive.

[0007] The synthetic resin closed-cell foam is formed of a plate material having a suitable thickness with a large number of independent fine pores and flexibility and a certain degree of elasticity inside. By having this, even if it is thin, it is excellent in heat retention, and furthermore, there is no hygroscopicity due to the fine pores, that is, each bubble is independent, and therefore, there is almost no decrease in the heat insulation rate due to moisture absorption. In addition, due to the lack of hygroscopicity, the closed-cell foam of synthetic resin does not need to be covered with a moisture-proof cover, etc., and has flexibility and some elasticity to cope with irregularities and bends. Buildings that are easy to handle and easy to install, work efficiency is high, and that the synthetic resin closed-cell foam itself is lightweight, suppresses the weight increase of moisture-proof covers, etc., and makes it easy to handle the heat-retaining duct. And so on. Furthermore, since the closed surface of the synthetic resin foam is extremely strong without generating dust, etc., and even if it is damaged, there is no danger of moisture infiltration, so there is no problem in performing work before shipment from the factory. It will not occur.

FIGS. 2 (a) and 2 (b) are the same as FIG. 1 except that a heat insulating material 2 made of a synthetic resin closed-cell foam is adhered and attached to the entire inner periphery of the rectangular tubular duct 1.

FIG. 3 (a) shows a heat insulating duct which is bonded to the outside of the cylindrical duct 5, and FIG. 3 (b) shows a heat insulating material 2 made of a synthetic resin closed cell foam, which is adhered to the inside of the cylindrical duct 5. 6 indicates the state of shipment from the factory.

In this way, the heat insulating material 2 is bonded and attached in advance, and the pipes are installed in the room above the ceiling using the heat insulating ducts 3 and 6, which are shipped from the factory. can do.

[0011] The present invention provides a plate material 9 made of a synthetic resin closed cell foam as shown in an enlarged partial view of FIG. A heat insulating material 12 coated with an adhesive 10 on one surface of a rolled material and protected by a removable protective paper 11 is prepared, and the heat insulating material 12 is attached and adhered to the outer periphery of an existing duct to easily heat the structure. And so that you can.

When the plate flanges 7a, 7a or the angle flanges 7b, 7b are kept warm even when the ducts are connected to each other, as shown in FIGS. 5 and 6, a flange made of synthetic resin closed-cell foam is used. The covers 8a and 8b are separately formed, and are straddled to keep the envelope warm. 7c is a clip for connecting the plate flanges, 7d is a packing, 7e is a bolt, and 7f is a nut.

[0013]

[Effect of the invention]

 As described above, the present invention uses a synthetic resin closed-cell foam made of an appropriately thick plate with a large number of independent micropores and flexibility and some elasticity as an insulating material. Unlike conventional heat insulating materials such as glass wool, it is not necessary to wrap with vinyl or aluminum foil and tie up with a wire mesh. Because it is excellent and has no hygroscopicity, the synthetic resin foam itself can be lightweight, and the weight of the moisturizing cover can be eliminated, making the heat insulating duct easy to handle and reducing the burden on buildings. The effect that remarkable reduction can be obtained is brought about. In addition, due to its flexibility and some degree of elasticity, there is an effect that the heat insulating material can be easily and efficiently attached not only to the outside but also to the inside of the duct, and also to the uneven portion and the bent portion.

The insulating material made of synthetic resin closed-cell foam can be pre-installed on the entire surface of the outside or inside of the duct and shipped from the factory. This eliminates the necessity of installing a heat insulating material, thereby greatly improving work efficiency.

Since the synthetic resin closed cell foam does not generate dust and the like, there is no risk of damaging the skin or inducing respiratory illness due to suction. The effect is that the living environment of building users can be improved safely.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example in which a heat insulating duct made of a synthetic resin closed cell foam having a thick plate shape is adhesively attached to the entire outer periphery of a rectangular cylindrical duct to form a heat insulating duct.

FIG. 2 is a perspective view showing an example in which a heat insulating material made of a synthetic resin closed-cell foam is adhered and attached to the entire inner periphery of a rectangular tubular duct to form a heat insulating duct.

FIG. 3 (a) shows the outside of a cylindrical duct, FIG.
Is a perspective view showing an example in which a heat insulating material made of synthetic resin closed-cell foam is bonded and attached to the inside of a cylindrical duct to form a heat insulating duct.

FIG. 4 is a perspective view showing a plate made of a synthetic resin closed-cell foam in which an adhesive applied on one surface is protected by a peelable protective paper.

FIG. 5 is a perspective view showing a flange cover for both plate flanges and an attached state thereof.

FIG. 6 is a perspective view showing a flange cover for an angle flange and an attached state thereof.

[Explanation of symbols]

1 is a square tubular duct 2 is a heat insulating material made of a synthetic resin closed cell foam 3, 6 is a heat insulating duct 4 is an adhesive 5 is a cylindrical duct 7a is a plate flange 7b is an angle flange 7c is a plate flange connecting Clip 7d is packing 7e is bolt 7f is nut 8a, 8b is flange cover made of synthetic resin closed cell foam 9 is plate made of synthetic resin closed cell foam 10 is adhesive 11 is protective paper 12 is heat insulating material

Claims (3)

[Utility model registration claims] 1. A composite formed of a suitably thick plate material having a large number of independent fine holes and flexibility and some elasticity inside and outside the entire surface of the rectangular or cylindrical duct and the cylindrical duct. A heat insulating structure for a duct, wherein the heat insulating duct is formed by attaching a plate-like heat insulating material made of a resin closed-cell foam. 2. A duct made of a synthetic resin closed-cell foam which is coated on one surface and adhered and protected with a protective paper capable of peeling off the adhesive-coated surface, or rolled so as to be expandable in a deployable manner. 2. The heat insulating structure for a duct according to claim 1, wherein the heat insulating material is formed and attached to the outside or inside of the formed duct. 3. The connected flange portion of the duct is covered with a heat insulating material made of synthetic resin closed cell foam.
Or the heat insulating structure of the duct according to 2.