JPH1054497A - Duct hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve heat insulating sound absorption and flexibility, by arranging an inner wall in which an air permeable tape is spirally wound and an outer wall in which a flexible tape is spirally wound, and arranging a hard spiral partitioning wall between the inner and outer walls, and filling a sound absorbing heat insulating member in a spiral space. SOLUTION: In an inner wall 2, an air permeable tape such as a polyester nonwoven fabric is spirally wound and the side edges of the permeable tape are connected to each other. In an outer wall 3, a synthetic resin tape such as soft vinyl chloride is spirally wound at a constant interval around the periphery of the inner wall 2, and the side edges of the synthetic resin tape are connected to each other. In a hard spiral reinforced partitioning wall 4, a platelike synthetic resin such as polyethylene is spirally wound around the peripheral surface of the inner wall 2 while a lower end surface 4a whose thickness is a little bit increased is fixed and erected in a peripheral direction, and an upper end surface 4b is fixed to the inner circumferential surface of the outer wall 3. Therefore, the partitioning wall 4 is made to serve as a spiral partitioning wall between the inner wall 2 and the outer wall 3 so as to form a spiral space, and a sound absorbing heat insulating member 5 formed of a foaming resin tape having a successive bubble structure, such as foaming urethane, is filled into the spiral space. Therefore, flexibility, heat insulation and sound absorbing property can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a duct hose,
In particular, the present invention relates to a flexible duct hose excellent in both heat insulation and sound absorption.

[0002]

2. Description of the Related Art Conventionally, a synthetic resin foam layer having closed cells is provided on the inner surface of a duct made of metal or the like connected to a main body of an air conditioner, and a synthetic resin foam layer having open cells is further provided on the inner surface thereof. 48-
No. 2,785.

However, application of the above duct structure to a flexible duct used for a new application such as a heat exchange air unit to be described later cannot be applied to various building structures and construction methods, and piping is difficult due to difficulty in construction. Will also be troublesome.

That is, in recent years, as one of the energy-saving and comfortable living environments, there has been a demand for a highly confidential and highly insulated house which can not only save energy for cooling and heating but also maintain a stable indoor air environment all day long. Designing an aggressive ventilation system is essential for highly sensitive and highly insulated homes to address the new problems of reduced natural ventilation and poor airflow resulting in air pollution, condensation, mold and odors .

[0005] As a part of the ventilation system, a flexible duct is piped above the ceiling of the house, and it is required that external air supplied by a blower be supplied into the room through the duct. In terms of performance, both heat insulation and sound absorption are required. In other words, due to the significant temperature difference inside and outside the duct, it is necessary to provide heat insulation to prevent condensation on the outside of the duct, and at the same time, the noise of the blower propagates through the inside of the duct to the room It is necessary to provide a sound absorbing property in order to prevent noise.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention has excellent heat insulation and sound absorption and flexibility as a component of the above-mentioned application, and is applicable to various structures and construction methods of buildings. It is an object of the present invention to provide a flexible duct that can be freely plumbed and that can be easily constructed.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an inner wall formed by spirally winding a tape made of a breathable material and joining the side edges thereof, and an outer wall of the inner wall. An outer wall formed by spirally winding a tape made of a flexible material at regular intervals in the radial direction and joining the side edges thereof,
A hard helical partition wall vertically fixed between the inner and outer walls so as to helically partition the inner and outer walls, and a duct hose filled with a sound absorbing heat insulating material in a helical space formed between the inner and outer walls. To provide.

In the above-mentioned duct hose, the inner wall is formed of a non-woven fabric strip, the outer wall is formed of a soft synthetic resin tape, and the hard spiral partition is formed of a hard synthetic resin plate to form a spiral. The inner wall and the outer wall are connected to form a shape-reinforcing reinforcement, and a foamed resin tape having an open-cell structure is spirally wound and filled as a sound-absorbing heat insulating material.

Further, in the above duct hose, it is preferable that glass wool is filled as a sound absorbing and heat insulating material.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a duct hose according to the present invention will be described below with reference to the drawings. In FIG. 1, a duct hose 1 includes an inner wall 2, an outer wall 3, a hard spiral reinforcing partition 4, and a sound absorbing heat insulating material 5. The inner wall 2 is formed by spirally winding a breathable tape such as a polyester nonwoven fabric and joining the side edges thereof. The outer wall 3 is formed by spirally winding a synthetic resin tape such as soft vinyl chloride around the outer periphery of the inner wall 2 at a predetermined interval, and joining the side edges thereof.

The hard spiral reinforcing partition wall 4 is formed in a substantially plate shape from a hard synthetic resin such as polyethylene. In a state of being spirally wound in a state where the outer wall 3 rises up, and the upper end surface 4 b thereof is fixed to the inner peripheral surface of the outer wall 3. Therefore, the space between the inner wall 2 and the outer wall 3 is formed as a spirally continuous space with the hard spiral reinforcing partition walls 4 serving as a spiral partition wall. The sound-absorbing heat-insulating material 5 made of a foamed resin tape is filled to form a sound-absorbing heat-insulating layer. Further, instead of the foamed resin tape, glass wool may be filled in the spiral space as the sound absorbing heat insulating material 5 to form a sound absorbing heat insulating layer.

The duct hose according to the present invention is formed by extruding an outer peripheral surface of an inner wall from an extruder while spirally winding an air-permeable tape on a conventionally known rotary shaft for forming a hose. A hard spiral reinforcing partition made of hard synthetic resin is attached, and a soft synthetic resin tape being extruded and molded from another extruder is spirally wound on the outside thereof, and the outer wall is fused to the upper end surface of the hard spiral reinforcing partition. Is formed, and a hose body having a spiral space formed therein is formed, and the spiral space is filled with a sound absorbing heat insulating material.

The duct hose according to the present invention is not limited to the above-described embodiment, but can be variously modified within the scope of the invention. Other fibers or synthetic resin with a large number of through holes can be used, and the hard spiral reinforcing partition is not limited to hard synthetic resin, but may be one that connects the inner and outer walls and can shape-reinforce it. Alternatively, the outer wall may be formed by spirally winding a tape of a flexible material such as cloth or rubber other than synthetic resin.

[0014]

According to the present invention, since the inner wall of the duct hose is formed of a breathable material, the air flow noise inside the hose is absorbed,
The sound absorbing and heat insulating properties can be ensured by the sound absorbing and heat insulating material, and the noise of the blower and the like can be suppressed, and at the same time, the occurrence of dew condensation on the outer surface of the hose can be prevented. Further, since the inner wall, the sound-absorbing heat insulating material and the outer wall are formed of a flexible material, the flexibility is excellent, and the piping can be made freely without using an elbow, and the work is easy. As described above, according to the present invention, it is possible to obtain a duct hose that is excellent in flexibility, easy to handle in piping work, and rich in both heat insulation and sound absorption.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal side view showing a duct hose according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Duct hose 2 ... Inner wall 3 ... Outer wall 4 ... Hard spiral reinforcement partition wall 5 ... Sound absorbing heat insulating material

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

Claims (3)

[Claims] An inner wall formed by spirally winding a tape made of a gas-permeable material and joining its side edges to each other, and a tape made of a flexible material formed on the outer periphery of the inner wall at regular intervals in a radial direction. An outer wall formed by spirally winding and joining the side edges thereof,
A hard helical reinforcing partition that is erected and fixed between the inner and outer walls so as to helically partition between the inner and outer walls, and that a helical space formed between the inner and outer walls is filled with a sound absorbing heat insulating material. Characteristic duct hose. 2. The inner wall is formed by spirally winding an inner wall with a non-woven fabric strip, an outer wall with a soft synthetic resin tape, and a hard spiral reinforcing partition with a hard synthetic resin plate-like body. 2. The duct hose according to claim 1, wherein the foamed resin tape having an open-cell structure is spirally wound and filled as a sound-absorbing heat insulating material. 3. The duct hose according to claim 2, wherein glass wool is filled as the sound absorbing and heat insulating material.