JPH0448428Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an air conditioning/ventilation duct using a hard foam board as a duct forming material.

[Conventional technology]

Conventional air conditioning and ventilation ducts are made by bending and welding steel plates into a box shape to form the duct body, and then coating the outside of the duct body with a heat insulating material such as glass wool, rock wool, or styrofoam. It was constructed by covering the outside with an exterior material made of a composite sheet material of glass cloth and thin aluminum film.

[Problem that the invention attempts to solve]

However, when configuring an air conditioning/ventilation duct as described above, it is necessary to form the duct body by bending and welding steel plates, cover the outside of the duct body with heat insulating material, and apply the exterior material. It takes a lot of time to manufacture the specified duct, and the cross-sectional structure of the duct has a three-layer structure of steel plate, heat insulation material, and exterior material, which makes it heavy and costly. There was a problem.

[Means for solving the problems] The air conditioning/ventilation duct of the present invention, which solves the above-mentioned conventional problems, has excellent mechanical strength and heat insulation properties, has little volume change even when exposed to high temperatures, and is resistant to brittleness. A rigid foam board 1 having an appropriate thickness is bent into a box shape and bonded to form a duct body 4 having concave and convex fitting parts 2 and 3 for duct connection at both lengthwise ends. The outer periphery of the duct body 4 is coated and bonded with an exterior material 5 made of a composite sheet material of glass cloth 5a and aluminum thin film 5b.

[Effect]

According to the air conditioning/ventilation duct having the above structure, the duct body 4 is constructed by bending and gluing the rigid foam board 1 into a box shape, and the outer periphery of the duct body 4 is coated and bonded with the exterior material 5. Through this work, a duct with a desired cross-sectional dimension can be easily manufactured. In addition, the air conditioning/ventilation duct of the present invention manufactured using the hard foam board body 1 as the main body material has a double cross-sectional structure of the hard foam board body 1 and the exterior material 5, and is light in weight and cost effective. Due to the characteristics of the inexpensive and hard foam board 1, it has excellent mechanical strength and heat insulation, and its volume hardly changes even when exposed to high temperatures, and problems such as cracking and collapse do not occur.

〔Example〕

An embodiment of this invention will be described below with reference to Fig. 1.This air conditioning/ventilation duct has excellent mechanical strength and heat insulation, and has an appropriate plate thickness that exhibits little volume change and does not become brittle even when exposed to high temperatures. (e.g. 15mm
A duct body 4 is made by bending and gluing a hard foam board 1 having a thickness of about 100 ml to a box shape, and having concave and convex fitting parts 2 and 3 for duct connection at both lengthwise ends.
The entire outer periphery of the duct body 4 is coated with an exterior material 5 made of a composite sheet material of a glass cloth 5a and an aluminum thin film 5b as shown in FIGS. 1 and 2.

In addition, the hard foam board body 1 is
According to the method disclosed in Japanese Patent No. 26776, an organic solvent is added to an inorganic powder and wetted to obtain wet powder A.
Separately, a mixture of vinyl chloride resin powder and an inorganic fiber agent is designated as B, and the wet powder A and mixture B are
This material was obtained by a manufacturing method in which a sol-like product obtained by adding an organic solvent and butane chloride to the mixture was foam-molded by a conventional method. V-shaped grooves 6a, 6b, 6c for bending into a box shape with predetermined cross-sectional dimensions as shown by imaginary lines in FIG.
and a step-like notch 2a on the inner surface side of one end for forming uneven fitting parts 2 and 3 for duct connection as shown in FIG. 2 at both lengthwise ends of the board body 1. A stepped notch 3a is provided on the outer side of the other end, and a stepped notch 7a is provided on the inner side for forming a box closing joint surface 7 on one side of the board body 1.
An adhesive (not shown) is applied to the cut surfaces of the V-shaped grooves 6a to 6c and the stepped notch surface 7a on one side of the board, and the board body 1 is assembled as shown by imaginary lines in FIG. By bending it into a box shape and gluing it together, a duct main body 4 having a desired cross-sectional dimension is constructed.

[Effect of idea]

Since the air conditioning/ventilation duct of this invention is as described above, the duct body is constructed by bending and gluing the rigid foam board 1 into a box shape, and the outer periphery of the duct body 4 is covered with an exterior material 5. A duct with a desired cross-sectional size can be easily manufactured by simply applying the coating and bonding. In addition, the air conditioning/ventilation duct of the present invention manufactured using the hard foam board body 1 as the main body material has a cross-sectional structure of a two-layer structure of the hard foam board body 1 and the exterior material 5, and is light in weight and cost effective. It is inexpensive, and due to the characteristics of the rigid foam board 1, it has excellent mechanical strength and insulation properties, and its volume hardly changes even when exposed to high temperatures.
Moreover, problems such as cracks and collapse do not occur.

[Brief explanation of the drawing]

Figure 1 is an end view showing the air conditioning/ventilation duct of the present invention, Figure 2 is a perspective view of the air conditioning/ventilation duct, and Figure 3 is a plan view of the rigid foam board that is the constituent material of the duct body. 4 is a right side view of FIG. 3, and FIG. 5 is a bottom side view of FIG. 3. DESCRIPTION OF SYMBOLS 1... Hard foam board body, 2, 3... Concave-convex fitting part for duct connection, 2a, 3a... Stepped notch part for forming a concave-convex fitting part for duct connection, 4...
...Duct body, 5...Exterior material, 5a...Glass cloth, 5b...Aluminum thin film, 6a-6c...
...V-shaped groove, 7...Box closing joint surface, 7a...
Stepped cutout to form box closure joint surface.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A rigid foam board with an appropriate thickness that has excellent mechanical strength and heat insulation properties, exhibits little change in volume and does not become brittle even when exposed to high temperatures, and is folded into a box shape. The duct body is bent and bonded to form a duct body having uneven fitting parts for duct connection at both lengthwise ends, and an exterior material made of a composite sheet material of glass cloth and aluminum thin film is covered and bonded to the outer periphery of this duct body. air conditioning and ventilation ducts. (2) The rigid foam board is made by adding an organic solvent to an inorganic powder and moistening it to make a wet powder A, separately mixing a vinyl chloride resin powder and an inorganic fiber agent to make a mixture B, and combining the wet powder A and the mixture B. This product is obtained by foam-molding a sol-like product obtained by adding an organic solvent and liquefied butane to this mixture using a conventional method. A stepped notch on the inner surface of one end and a stepped notch on the other side for forming a V-shaped groove for bending and forming uneven fitting parts for duct connection at both longitudinal ends of the board body. A stepped notch is provided on the outer surface side, and a stepped notch is provided on the inner side for forming a box closing joint surface on one side of the board body, and the cut surface of the V-shaped groove and one side of the board are provided with a stepped notch on the inner side for forming a box closing joint surface. Utility model registration claim 1, characterized in that a duct body with a desired cross-sectional dimension is constructed by applying an adhesive to the step-like notched surfaces of the sides, bending this board body into a box shape, and gluing it together. Air conditioning/ventilation ducts as described in section.