JP6914032B2 - Thermal insulation flexible duct - Google Patents

Description

The present invention relates to, for example, a heat insulating flexible duct used for an air conditioning duct for building equipment.

Conventionally, as an air-conditioning duct for building equipment, a heat-retaining flexible duct having a structure in which a heat-retaining material made of glass wool or hard steel wire is provided on the inner surface of an outer cover material such as a vinyl chloride film is known. In such a heat-retaining flexible duct, heat-retaining work is not required, the length dimension can be compressed, and the overall capacity can be reduced, so that the hanging work is easy, and it has been widely adopted in recent years. (See, for example, Patent Document 1).

This conventional heat-retaining flexible duct has a configuration including a tubular inner core, a heat-retaining material provided so as to cover the inner core, and an outer covering material covering the heat-retaining material, and the inner core has a predetermined width. The non-woven fabric that has been cut into a ribbon shape is laminated into a tubular shape, and steel wires are laminated on the bonded surface to maintain the tubular shape while being integrated. The outer cover material is a heat insulating material using a resin film. It covers.

Japanese Unexamined Patent Publication No. 8-82436

Conventional heat-retaining flexible ducts are used in many sites because they are lightweight, flexible, and easy to install. Since it is processed only in a certain direction, when stress is applied in the same direction as the winding direction, the resistance to stress is small, which causes the heat-retaining flexible duct to easily tilt and deform easily. be. In particular, if the construction is performed in an S-shape or if the construction is performed in an L-shape with no margin, the circular shape of the heat-retaining flexible duct may be crushed.

The present invention has been made to solve such a conventional problem, and provides a heat-retaining flexible duct having high duct strength, light weight and flexibility, which is not easily deformed by stress and is not likely to be crushed. The purpose is to provide.

In order to solve the above problems and achieve the object, the present invention is configured as follows.

The invention according to claim 1 is a heat insulating flexible duct including a tubular inner core, a heat insulating material provided so as to cover the inner core, and an outer covering material covering the heat insulating material.
The inner core is formed by winding a ribbon-shaped material cut to a predetermined width into a cylinder and laminating only the material ends, and when the material ends are wound and bonded, the bonding surface of the material end is laminated. The steel wire of the inner core is superposed on the inner core to maintain the tubular shape.
The outer cover material is formed by winding a ribbon-shaped film material cut to a predetermined width into a tubular shape and laminating only the end portions of the film material, and when winding the film material into a tubular shape and laminating the film material end portion. The steel wire of the outer cover material is overlapped on the bonded surface of the above material to maintain the tubular shape.
In the inner core, only the portion where the steel wires at the end of the material are overlapped is the double bonding surface of the material.
In the outer cover material, only the portion where the steel wires at the end of the film material are overlapped is the double bonding surface of the film material.
The direction in which the material of the inner core is wound and bonded is opposite to the direction in which the film material of the outer cover material is wound and bonded, and the structure is characterized in that resistance to stress can be obtained. It is a heat-retaining flexible duct.

With the above configuration, the present invention has the following effects.

In the invention according to claim 1, when the inner core is made by winding a ribbon-shaped material cut to a predetermined width into a tubular shape and laminating only the end portions of the material, and then winding the inner core into a tubular shape and laminating them. The structure is such that the steel wire of the inner core is overlapped on the bonded surface at the end of the material to maintain the tubular shape, and the outer cover material is a film made by winding a ribbon-shaped film material cut to a predetermined width into a tubular shape. When only the end parts of the material are overlapped and bonded, and when they are wound into a cylinder and bonded, the steel wire of the outer cover material is overlapped on the bonding surface of the end of the film material to maintain the tubular shape. Only the part where the steel wire at the end of the material is overlapped is the double bonding surface of the material, and as for the outer cover material, only the part where the steel wire at the end of the film material is overlapped is the double bonding surface of the film material. Since it is a mating surface, the duct strength is high, and it is lightweight and flexible, so that construction is easy. Further, the direction in which the material of the inner core is wound and bonded is opposite to the direction in which the film material of the outer cover material is wound and bonded, and the structure is such that resistance to stress can be obtained, so that the weight is lightweight. Moreover, although it is flexible, it does not tilt in one direction, the resistance to stress increases, the heat-retaining flexible duct is not easily deformed, and there is no risk of collapse.

It is a figure which shows the structure of a heat-retaining flexible duct. It is a side view of a part of a heat-retaining flexible duct. It is sectional drawing of the heat insulation flexible duct. It is a figure which shows the inner core, the heat insulating material, and the outer cover material of a heat insulating flexible duct. It is an enlarged side view of a part of an inner core and an outer cover material.

Hereinafter, embodiments of the heat-retaining flexible duct of the present invention will be described. Embodiments of the present invention represent the most preferred form of the invention, and the invention is not limited thereto.

The heat-retaining flexible duct of this embodiment will be described with reference to FIGS. 1 to 5. FIG. 1 is a diagram showing the structure of the heat insulating flexible duct, FIG. 2 is a side view of a part of the heat insulating flexible duct, FIG. 3 is a cross-sectional view of the heat insulating flexible duct, and FIG. 4 is an inner core, a heat insulating material, and an outer cover of the heat insulating flexible duct. A view showing the material, FIG. 5 is an enlarged side view of a part of the inner core and the outer cover material.

The heat-retaining flexible duct 1 of this embodiment includes a tubular inner core 10, a heat-retaining material 20 provided so as to cover the inner core 10, and an outer covering material 30 that covers the heat-retaining material 20, for example. Used for air conditioning ducts for building equipment.

The inner core 10 has a structure in which a material 11 cut into a predetermined width and formed into a ribbon shape is wound into a tubular shape and bonded to each other, and a steel wire 12 is laminated on the bonded surface to maintain the tubular shape. As the material 11, a PET-based non-woven fabric, a woven fabric, a PET-based film, or the like is used.

As the heat insulating material 20, a glass wool heat insulating material, a PET fiber-based heat insulating material, or the like is used. The glass wool heat insulating material preferably has a standard value of ^{24 kg / m 2 × 25 mm.}

The outer cover material 30 has a structure in which a film material 31 cut into a predetermined width and formed into a ribbon shape is wound into a tubular shape and bonded to each other, and a steel wire 32 is laminated on the bonded surface to maintain the tubular shape. As the film material 31, a soft vinyl chloride resin film or a polyethylene resin film is used, but a polyethylene resin film is preferable. Further, a material obtained by laminating an aluminum metal foil and a polystyrene resin film, or an aluminum-deposited polyethylene film may be used.

The direction X in which the inner core 10 is wound and bonded is opposite to the direction Y in which the outer cover material 30 is wound and bonded. The angles θ1 and θ2 of the bonding direction X and the bonding direction Y with respect to the respective axial directions Z are not particularly limited. Further, the bonding direction X and the bonding direction Y do not have to be the same angle, but the same angle is preferable.

The end 1a of the heat-retaining flexible duct 1 is treated with a duct tape or the like so that it can be easily inserted into a spiral duct, a muffling box, or the like.

The heat-retaining flexible duct 1 of this embodiment is used as an air-conditioning duct for building equipment, and may be constructed in an S-shape in particular, or may be constructed in an L-shape with no margin. The inner core 10 has a configuration in which a material 11 cut into a predetermined width and formed into a ribbon shape is wound into a tubular shape and bonded to each other, and a steel wire 12 is overlapped on the bonded surface to maintain the tubular shape. Is a structure in which a film material 31 cut into a predetermined width and formed into a ribbon shape is wound into a tubular shape and bonded, and a steel wire 32 is overlapped on the bonded surface to maintain the tubular shape, and the duct strength is increased. Moreover, it is lightweight and flexible, so it is easy to install. Further, since the direction X in which the inner core 10 is wound and bonded and the direction Y in which the outer cover material 30 is wound and bonded are opposite, the heat insulating flexible duct 1 does not tilt in one direction and resists stress. The force becomes large, and it is hard to be deformed even when used in an L-shape or S-shape, and there is no risk of crushing.

The present invention can be applied to, for example, a heat-retaining flexible duct used for an air-conditioning duct for building equipment, has high duct strength, is lightweight and flexible, is not easily deformed by stress, and is not likely to be crushed.

1 Thermal insulation flexible duct 10 Inner core 11 Material 12 Steel wire 20 Thermal insulation material 30 Outer cover material 31 Film material 32 Steel wire X Inner core 10 winding and bonding direction Y Outer cover material 30 winding and bonding direction

Claims (1)

A heat-retaining flexible duct including a tubular inner core, a heat-retaining material provided so as to cover the inner core, and an outer cover material covering the heat-retaining material.
The inner core is formed by winding a ribbon-shaped material cut to a predetermined width into a cylinder and laminating only the material ends, and when the material ends are wound and bonded, the bonding surface of the material end is laminated. The steel wire of the inner core is superposed on the inner core to maintain the tubular shape.
The outer cover material is formed by winding a ribbon-shaped film material cut to a predetermined width into a tubular shape and laminating only the end portions of the film material, and when winding the film material into a tubular shape and laminating the film material end portion. The steel wire of the outer cover material is overlapped on the bonded surface of the above material to maintain the tubular shape.
In the inner core, only the portion where the steel wires at the end of the material are overlapped is the double bonding surface of the material.
In the outer cover material, only the portion where the steel wires at the end of the film material are overlapped is the double bonding surface of the film material.
The direction in which the material of the inner core is wound and bonded is opposite to the direction in which the film material of the outer cover material is wound and bonded, and the structure is characterized in that resistance to stress can be obtained. Thermal insulation flexible duct.

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