JPH11173493A - Heat insulating hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulating hose taking the global environment and health into consideration by using a resin in a polyolefin series, which is not harmful as a resin material. SOLUTION: In this heat insulating hose, an external layer material 12 and heat insulating material 13 are wound around the outer circumferential part of an internal layer material 11 in a spiral shape so as to be formed into a heat insulating hose body 10, mouths 21 and 25 are coupled in both the end parts of the hose body 10 so as to be bonded with adhesives 15. In this case, the internal layer material 11 and the external layer material 12 are made of a resin in a polyolefin series such as EVA, LDPE, and heat insulating material 13 is made of formed polyethylene. Besides, a hot melt type resin in a polyolefin series such as EVA, is used as adhesives. The mouths 21 and 25 are made of a resin in a polyolefin series such as PP, PE, EVA, TPE.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated hose, and more particularly to an insulated hose used as an insulated drain hose of an air conditioner.

[0002]

2. Description of the Related Art Conventionally, as a heat insulating hose connected to a drain board of an air conditioner indoor unit, a heat insulating material made of foamed polyethylene is filled in a hollow portion of an inner and outer layer material having a partition wall to produce a heat insulating hose body. A hose having a mouth (pipe material) bonded to both ends of the hose body has been used. This type of insulating hose uses a main material, that is, a partition wall, inner and outer layer materials, and a mouth using a vinyl chloride resin (PVC).

However, in recent global environmental problems, waste combustion of PVC generates toxic gas, causes acid rain, and PVC itself is regarded as a carcinogenic substance. Tend to be added.

[0004] Therefore, an object of the present invention is to provide an insulated hose which uses a non-hazardous polyolefin resin as a resin material and is considered for the global environment and health.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, an insulating hose according to the present invention comprises an insulating hose body made of a polyolefin resin and a polyolefin resin fitted and bonded to both ends of the hose body. And a hot melt type adhesive made of a polyolefin resin is used as the adhesive.

[0006] The hose body has a foamed polyethylene inserted as an insulating material between the inner and outer layers made of, for example, ethylene-vinyl acetate copolymer (EVA). The mouth uses hard PP, PE, etc. for connection to the drain board of the air-conditioning indoor unit, and soft EVA for connection to the extension drain hose,
Use TPE or the like. It is preferable to use a hot melt type EVA as the adhesive. Further, a reinforcing core wire is preferably spirally wound around the hose body, and iron, PE, PP, or the like is used as the core wire.

According to the present invention, since a polyolefin resin is used as the resin material, there is no harm that causes environmental destruction. In addition, since the hot melt adhesive is used for bonding the hose body made of polyolefin resin and the mouth, the hose can be easily and reliably bonded.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a heat insulating hose according to an embodiment of the present invention.

FIG. 1 shows a sectional structure of a heat insulating hose according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view. This insulated hose generally comprises a hose body 10,
The mouth 21 and 25 are attached to both ends. The hose body 10 includes an inner layer material 11, an outer layer material 12, a heat insulating material 13, and a reinforcing core wire 14.

The inner layer material 11 is an extruded strip 11a.
Are polymerized so that the halves overlap each other, and spirally wound. The reinforcing core wire 14 is inserted between the overlapping strips 11a, and a projection 11b is formed substantially at the center of the strip 11a. The reinforcing core wire 14
It is made of iron, PE, PP, or the like, is formed into a coil shape having the same diameter as the inner layer material 11, and is sandwiched between overlapping portions of the adjacent strips 11a. The inner layer material 11 is made of a soft polyolefin resin such as EVA or LDPE, and the overlapping portions of the adjacent strips 11a are fused and integrated.

The outer layer material 12 is composed of a partition wall portion 12a, a first coating portion 12b, and a second coating portion 12c. Like the inner layer material 11, the outer layer material 12 is formed by extrusion using a soft polyolefin resin such as EVA or LDPE. It was done. The heat insulating material 13 is a thick tape-shaped foamed polyethylene, is accommodated in a space formed by the partition wall portion 12a and the first coating portion 12b of the outer layer material 12, and has a spiral shape on the outer peripheral surface of the inner layer material 11. Wound without gaps. At the time of this winding,
The second coating portion 12c to be wound later is superimposed on the first coating portion 12b that has been wound first.

On the other hand, the mouths 21, 25 are connected to the connecting portions 21a, 2
5a, inner cylinder portions 21b and 25b, and outer cylinder portions 21c and 25c. The mouth 21 is for fitting into a drain board of an air conditioning indoor unit, and is integrally formed of a hard polyolefin resin such as PP or PE. The mouth 25 is for connecting with the extension drain hose, EVA, TP
It is integrally formed of a soft polyolefin resin such as E.

The mouths 21 and 25 are respectively provided at both ends of the hose body 10 with inner and outer cylinders 21b, 21c, 25b and 2b.
5c, the inner peripheral surface of the inner layer material 11 and the inner cylindrical portion 21b,
The adhesive 15 is interposed between the outer peripheral surface 25b and the outer peripheral surface of the adhesive 25b. As the adhesive 15, a hot-melt type polyolefin resin such as EVA is used.

In the present embodiment, all polyolefin resins are used as the resin material, no harmful PVC is used, and no problems such as environmental destruction and adverse effects on health are caused. . In addition, since the hot melt type polyolefin resin is used for bonding the hose body 10 to the mouths 21 and 25, the bonding itself is easy and reliable.

The heat-insulating hose according to the present invention is not limited to the above embodiment, but can be variously modified within the scope of the invention. In particular, the structure of the hose body is arbitrary, and the inner layer material, the outer layer material, the heat insulating material, and the core wire may have various cross-sectional shapes. Also, the mouth may be of various shapes.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a heat-insulating hose according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a part of the heat insulating hose.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Hose main body 11 ... Inner layer material 12 ... Outer layer material 13 ... Heat insulation material 14 ... Reinforcement core wire 15 ... Adhesive 21, 25 ... Mouth

Claims (1)

[Claims] An insulated hose body made of a polyolefin resin and a mouth made of a polyolefin resin fitted and bonded to both ends of the hose body, and a hot melt type adhesive made of a polyolefin resin. A heat-insulated hose, characterized in that it is used.