JPH1194141A - Duct hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a duct hose which is a flexible duct capable of being utilized as a part for use such as a ventilating system in a high airtight and high heat insulating residence and has a structure which is excellent in sound absorbing property and flexibility and can be continuously molded into a long size, cope with structures and methods of various kinds of buildings and easily perform an execution by making universal piping. SOLUTION: This duct hose 1 is made to have a structure in which a long size molding is possible by a permeable inner wall 2 which is continuously molded into an indefinite length along a hose shaft direction by spirally winding a tape 3 made of a permeable material, connecting the side edges each other and keeping a form by a hard spiral reinforcing body, an intermediate foaming layer which includes a sound absorbing foaming layer 5 which is continuously molded into an indefinite length along the hose shaft direction and is continuously molded into an indefinite length by spirally winding of a soft foaming tape of a continuous air bubble structure on the outer periphery of at least the permeable inner wall 2 and a flexible outer wall 8 which is continuously molded into an indefinite length along the hose shaft direction by spirally winding a tape made of a flexible material on the outer periphery of the intermediate foaming layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct hose, and more particularly to a flexible duct hose which is excellent in sound absorption and heat insulation and can be continuously formed in a long length.

[0002]

2. Description of the Related Art Conventionally, a synthetic resin foam layer having closed cells on an inner surface of a metal duct connected to a main body of an air conditioner or heater,
Furthermore, a duct structure that provides a heat insulating sound absorbing property by providing a synthetic resin foam layer having open cells on its inner surface has been developed.
No. 85 is known.

[0003]

However, application of the above-described duct structure to a duct used for a new application such as a heat exchange air unit, which will be described later, cannot cope with various building structures and construction methods. Piping is difficult and construction is troublesome.

That is, in recent years, as one of energy-saving and comfortable living environments, there has been a demand for a highly airtight and highly insulated house that can not only save energy for cooling and heating but also maintain a stable indoor air environment all day long. In highly airtight and highly insulated homes, it is imperative to design aggressive ventilation systems to address the new problems of reduced air pollution, poor airflow and dew, mold and odor due to poor ventilation .

[0005] Then, it is required that a flexible duct as a component of the above-mentioned ventilation system be piped behind the ceiling of the house and that the external air supplied by a blower be supplied into the room through the duct. Sound absorption is required as one of the performances of this flexible duct. That is, it is necessary to impart sound absorbing properties in order to prevent the noise of the blower from propagating through the inside of the duct to the room.

[0006] In view of the above, the present invention is a flexible duct which can be used as a part of an application such as a ventilation system in a highly airtight and highly insulated house, and which is excellent in sound absorption and flexibility and is continuously formed in a long length. It is an object of the present invention to provide a duct hose having a structure that can be applied to various structures and construction methods of a building, and to easily perform construction by freely piping.

[0007]

According to the present invention, in order to solve the above-mentioned problems, a flexible duct hose is constituted by an inner wall, an intermediate foam layer and an outer wall, and the inner wall is spirally wound with a tape made of a breathable material. By turning the side edges together and holding the shape by the hard helical reinforcement, it is formed on the permeable inner wall continuously formed to have an indefinite length along the hose axis direction, and the intermediate foam layer is formed at least by the permeable inner wall. A flexible foam tape with an open-cell structure is spirally wound around the outer periphery of the hose. The sound-absorbing foam layer continuously formed to an indefinite length along the hose axis direction is continuously formed to an indefinite length along the hose axis direction. A flexible outer wall formed continuously in an indefinite length along the hose axial direction by spirally winding a tape made of a flexible material around the outer periphery of the intermediate foam layer. Form And by, it is an unit that it has a duct hose structure capable long molding.

[0008]

According to the present invention, since the inner wall of the duct hose is formed as an air-permeable inner wall, the airflow sound inside the hose can be absorbed and this can be absorbed by the sound-absorbing foam layer having an open-cell structure immediately outside. Since the inner wall, the intermediate foam layer and the outer wall, which are the components of the duct hose, are all formed by spirally winding a strip of flexible material, a hose of indefinite length with excellent flexibility can be continuously formed. Can be obtained efficiently, the piping can be made freely without using an elbow, the work is easy, and it can be formed into an appropriate diameter from small diameter to large diameter, so it can correspond to various building structures, for example, it can be narrow Piping in space is also easy.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a duct hose according to the present invention will be described below with reference to the accompanying drawings. In FIG. 1, a duct hose 1 includes a gas-permeable inner wall 2, an intermediate foam layer, a sound-absorbing foam layer 5 located on the inner surface side of the hose, an intermediate wall 6, and a heat-insulating foam layer located on the outer hose side of the intermediate foam layer. 7 and a flexible outer wall 8.

The permeable inner wall 2 is formed by crimping the bent edges formed on both sides of a metal band 4 such as a galvanized steel sheet formed by helically winding the side edges of a permeable wound tape 3 such as a polyester nonwoven fabric. The air-permeable tapes 3 are connected to each other, and the shape is reinforced and retained by the metal bands 4.

The sound-absorbing foam layer 5 is formed by spirally winding a flexible foamed resin tape having an open-cell structure such as urethane foam on the outer periphery of the gas-permeable inner wall 2 while abutting adjacent side edges thereof.

The intermediate wall 6 is formed by spirally winding a synthetic resin tape such as polyethylene around the outer periphery of the sound absorbing foam layer 5.

The heat-insulating foam layer 7 is formed by spirally winding a soft foam resin tape having a closed cell structure made of foamed polyethylene or the like around the outer periphery of the intermediate wall 6 while abutting the adjacent side edges thereof. The contact portion 7A of the adjacent side edge of the tape is displaced from the contact portion 5A of the adjacent side edge of the soft foamed resin tape forming the sound absorbing foam layer 5 in the hose axial direction and is on the same line. It is not located.

The flexible outer wall 8 is formed by spirally winding a synthetic resin tape such as polyethylene around the outer periphery of the heat insulating foam layer 7.

Therefore, the duct hose of this embodiment is excellent in flexibility and is formed to have an indefinite length and a long length, so that it is easy to handle in piping work and has a good sound absorbing and heat insulating property. Test results were obtained.

Regarding the heat insulating property, a cold air of -10 ° C. in a 20 ° C. atmosphere is introduced into a hose (hose length of about 3 m).
After flowing for 4 hours, it was visually observed whether or not dew condensation was generated on the outer surface of the hose. As a result, fine adhesion was recognized, but no dripping was observed and there was no problem in use.

Regarding sound absorption, a hose (hose length of about 3
An alarm for generating a sound source of 99 dB was attached to the end of m), and a microphone was attached to the rear end of the hose. The sound absorption was measured, and it was confirmed that the sound attenuated to about 65 dB.

The duct hose according to the present invention is not limited to the above embodiment, but can be variously modified within the scope of the invention. For example, a synthetic resin provided with other fibers or through holes other than the non-woven fabric can be used as the air permeable tape constituting the inner wall, and a hard helical reinforcing member may be used as long as it can shape-reinforce the inner wall. Metal wires such as steel wires can also be used. The outer wall and the intermediate wall may be formed by spirally winding a tape of a flexible material such as cloth or rubber other than synthetic resin. Further, in some cases, the formation of the intermediate wall may be omitted.

FIG. 2 shows a duct hose 1 'as another embodiment. The duct hose 1 'has the same structure of the air-permeable inner wall 2 and the sound absorbing foam layer 5 as the embodiment of FIG. It is formed simultaneously with a conductive material tape.

That is, a wide soft vinyl chloride resin tape T extruded on the outer periphery of the sound absorbing foam layer 5 is spirally wound so as to overlap the preceding tape, and the side edges thereof are thermally fused to each other to form an intermediate wall. 6. A heat insulating foam layer 7 is formed by inserting a soft foam tape having a closed cell structure in a non-adhered state into a spiral space formed by the flexible outer wall 8 and the partition wall 9. According to the present embodiment, even when the hose is bent at the time of storage or at the time of piping, since the heat insulating foam layer 7 is surrounded by the tape T around the periphery thereof, no displacement occurs.
The generation of voids in the heat insulating layer can be reliably prevented.

The above-described duct hose according to the embodiment of the present invention is mounted on a conventionally known rotary shaft for forming a hose.
It is obtained by sequentially winding a strip of a hose constituent material in a spiral shape, and does not require a special new forming device.

[0022]

According to the present invention, at least the sound absorbing foam layer of the intermediate foam layer is formed by spirally winding a soft foam tape so that the sound absorbing foam layer has an indefinite length along the hose axis direction. The flexible duct hose having excellent sound absorption can be obtained. Therefore, the duct hose piping can be freely performed without using an elbow, and the construction is simple.
It is of great practical value as a new air-conditioning duct hose such as a ventilation system in a highly airtight and highly insulated house.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal side view of a duct hose showing one embodiment of the present invention.

FIG. 2 is a partial vertical sectional side view of a duct hose showing another embodiment.

[Explanation of symbols]

 1, 1 '... duct hose 2 ... permeable inner wall 3 ... permeable tape 4 ... metal strip 5 ... sound absorbing foam layer 6 ... intermediate wall 7 ... heat insulating foam layer 8 ... flexible outer wall

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seiji Hattori 6 Titan Polymer, Shizuoka Pref. in the factory

Claims (1)

[Claims] 1. A flexible hose comprising an inner wall, an intermediate foam layer, and an outer wall, wherein the inner wall is spirally wound with a tape made of a breathable material, the side edges thereof are connected to each other, and the inner wall is shaped by a hard spiral reinforcement. By forming the intermediate foam layer on the air-permeable inner wall continuously formed to have an indefinite length along the hose axial direction, a soft foam tape having an open-cell structure is spirally wound around at least the outer periphery of the air-permeable inner wall. By forming a sound absorbing foam layer continuously formed in an indefinite length along the hose axis direction to form an intermediate foam layer continuously formed in an indefinite length along the hose axis direction, the outer wall of the intermediate foam layer A structure in which a long length can be formed by forming a flexible outer wall continuously formed into an indefinite length along the hose axis direction by spirally winding a tape made of a flexible material on the outer periphery. Features Duct hose that.