JPH07174292A - Heat insulating hose - Google Patents

Abstract

PURPOSE:To provide a heat insulating hose excellent in flexibility and heat insulating property and easily jointed and integrated with a joint member with the ill effect of a plasticizer hardly generated. CONSTITUTION:A hollow spiral protrusion 2 is integrally formed at the constant pitch on the outer peripheral surface of inner pipe material 1 formed of polyvinyl chloride resin. A core 3 formed of polyolefine resin such as polypropylene is included in the hollow spiral protrusion 2 without bonding. Strip heat insulating material 4 formed of foam polyethylene is spirally wound around the outer periphery of the inner pipe material 1 to cover it continuously. Outer pipe material 5 formed of polyethylene resin is fitted to the outer surface of the strip heat insulating material 4 formed of foam polyethylene and integrated with the strip heat insulating material 4 by fusion. That is, the surface of the strip heat insulating material 4 is integrated with the outer pipe material 5 to prevent the movement of the strip heat insulating material 4. This prevents the generation of a gap between the strip heat insulating material 4 at the time of bending a heat insulating hose A so as to maintain a desirale heat insulating effect for a long period of time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved heat insulating hose suitable for a heat insulating drain hose of an air conditioner and other heat insulating ducts of various devices.

[0002]

2. Description of the Related Art Conventionally, as this type of heat insulating hose, a flexible vinyl chloride heat insulating hose has been widely used. Generally, as shown in FIG. 5, a heat insulating material d made of expanded polyethylene is provided between inner and outer peripheral walls a and b made of polyvinyl chloride resin via a spiral partition wall c made of the same material (polyvinyl chloride resin). An iron wire e coated with a polyvinyl chloride resin f is spirally attached to the inner surface of the inner peripheral wall a so as to have strength so as to be integrated.

[0003]

However, the above conventional heat insulating hose has a heat insulating material d made of foamed polyethylene.
However, since it has poor adhesiveness with the polyvinyl chloride resin forming the outer tube b and the spiral partition wall c and cannot be integrally joined by adhesion or fusion, a heat insulating material made of expanded polyethylene from the cut end of the heat insulating hose. There is a problem that d tends to pop out, and the end treatment is difficult to perform.

Further, when the heat insulating hose is bent, since the spiral partition wall c and the heat insulating material d and the outer peripheral wall b and the heat insulating material d are not bonded, a gap due to bending strain is generated. There is a problem that the heat insulation effect is reduced.

Further, since the outer peripheral wall b is made of polyvinyl chloride resin and contains a plasticizer, the plasticizer migrates and is used as a heat insulating material for styrene or a drain pan of an air conditioner indoor unit body. There is a problem that the Styrofoam or the like is deformed or discolored.

On the other hand, as a method of preventing the adverse effect caused by the plasticizer, it is conceivable to form the inner and outer peripheral walls a and b and the partition wall c by the same material (polyethylene resin) as the heat insulating material d and integrally fuse the whole. However, in this case, the heat insulating material d
While there is no gap between the inner and outer peripheral walls a and b and the partition wall c, there is a problem that the entire structure becomes rigid and flexibility deteriorates. Also, when the whole is made of polyethylene resin, it is difficult to fix the joining member for joining with equipment such as an air conditioner by adhesion because the polyethylene resin has poor adhesiveness, and the joining member can be integrated. There is a problem that it lacks versatility.

The present invention has been made in view of the above problems of the prior art, is excellent in flexibility and heat insulation, is easy to bond and integrate with a joining member, and has the adverse effect of a plasticizer. The present invention provides a heat-insulating hose that is unlikely to occur.

[0008]

In order to achieve the above object, the present invention according to claim 1 is such that an outer peripheral surface of an inner pipe member made of polyvinyl chloride resin is spirally wound with a band-shaped heat insulating member made of expanded polyethylene. It is rotated and covered with heat insulation,
An outer hose made of polyethylene resin is fused and integrated with the outer peripheral surface of the band-shaped heat insulating material.

The invention of claim 2 is a heat-insulating hose characterized in that a joining member formed of polyvinyl chloride resin is bonded and integrated to the end portion of the inner pipe material made of polyvinyl chloride resin. is there.

[0010]

Therefore, according to the heat-insulating hose of the present invention, since the inner pipe member is made of polyvinyl chloride resin, it has flexibility and various bonding members can be bonded to the inner pipe member. It will be possible. Further, since the heat insulating material is made of foamed polyethylene and the outer pipe material made of polyethylene resin is fusion-bonded to the outer peripheral surface of the heat insulating material, even between the heat insulating material and the outer pipe material and between the heat insulating materials even when bent. There is no gap between them. Further, since the heat insulating material is fused to the outer pipe material, the heat insulating material and the outer pipe material are integrated, and the heat insulating material is prevented from jumping out from the cut portion of the hose.

Further, a band-shaped heat insulating material made of expanded polyethylene is spirally wound to be heat-insulated and covered.
Since the outer tube material made of polyethylene resin is fused and integrated with the outer peripheral surface of the band-shaped heat insulating material, the heat insulating material can be prevented from being displaced by fusing the outer wall without providing a partition wall.

Further, according to the invention of claim 2, since the joining member formed of polyvinyl chloride resin is bonded and integrated to the end portion of the inner pipe material made of the polyvinyl chloride resin, it can be used for an air conditioner or the like. The joint member is firmly fixed by adhesion of the polyvinyl chloride resins to each other, and the joint portion is prevented from falling off.

[0013]

Embodiments of the heat insulating hose of the present invention will be described below with reference to the drawings. FIG. 1 shows a heat insulating hose A of the present invention, in which 1 is an inner pipe material made of polyvinyl chloride resin, and hollow spiral ridges 2 are integrally formed at a constant pitch on the outer peripheral surface of the inner pipe material 1. A core wire 3 made of a polyolefin resin such as polypropylene is formed in the hollow spiral ridge 2 without being adhered. Further, a band-shaped heat insulating material 4 made of expanded polyethylene is spirally wound around the outer peripheral surface of the inner pipe material 1 so as to be continuously heat-insulated.

That is, according to the structure of the inner pipe member 1,
Since the core wire 3 made of a polyolefin resin such as polypropylene is included in the hollow spiral ridge 2 without adhering, it is superior in flexibility as compared with the one in which the iron wire is attached, and
There is no need to worry about rusting as with iron wire.

An outer tube member 5 made of polyethylene resin is fitted on the outer peripheral surface of the band-shaped heat insulating member 4 made of foamed polyethylene, and is integrated with the band-shaped heat insulating member 4 by fusion bonding. That is, the outer peripheral surface of the band-shaped heat insulating material 4 is integrated with the inner surface of the outer tube material 5 to prevent the band-shaped heat insulating material 4 from moving, and the band-shaped heat insulating material 4 is bent when the heat insulating hose A is bent.
A gap is prevented from being generated between them, and a decrease in heat insulation at the bent portion is prevented.

As shown in FIG. 2, the heat-insulating hose A has the joining members 6 and 6 fixed to both ends of the heat-insulating hose A for joining with equipment such as an air conditioner. The joining member 6 is provided with a fitting groove portion 7 for fitting the end portion of the heat insulating hose A, and the inner groove material 1 and the heat insulating material 4 and the outer tube material of the heat insulating hose A are provided in the fitting groove portion 7. 5, the inner surface of the fitting groove portion 7 of the joining member 6 and the inner pipe material 1 of the heat insulating hose A are integrated by an adhesive, and the other end portion of the fitting groove portion 7 A fitting joint 8 for joining with equipment such as an air conditioner is formed on the.

FIG. 3 shows another embodiment of the heat insulating hose of the present invention. The heat insulating hose A is provided with joining members 6 and 6'having different shapes at the side ends thereof. That is, in FIG. 2, the joining members 6 having the same shape at both ends are provided to be joined to equipment such as an air conditioner.
In FIG. 3, a joining member that connects the heat insulating hoses A to each other is fixed. In this product, one end of the heat insulating hose A is formed into a thin structure, and a fitting member 6'for fitting is fitted to the thin portion.
Is provided.

According to this structure, the fitting joining member 6'provided on another heat insulating hose A is fitted into the joining member 6 at one end of the heat insulating hose A, and a plurality of heat insulating hoses A are connected to form a long member. A heat insulating duct can be configured and used.

FIG. 4 shows still another embodiment of the heat insulating hose A of the present invention, in which the joining member 6 is provided only at one end of the heat insulating hose A and the inner pipe material 1 is provided at the other end. Cylindrical joining member 9 that is exposed without being covered with the band-shaped heat insulating material 4
The joint end portion is formed by inserting the.

According to this structure, the tubular joint member 9
Since it has been inserted, the end portion has excellent shock absorbing properties, the joint portion is soft and has excellent flexibility, and there is an advantage that connection to a bent joint portion or the like can be easily performed.

In the above embodiment, the case where the joint member 6 is integrally provided is shown. However, the heat insulating hose A is left as it is without the joint member 6 and the heat insulating hose A is provided on the machine side. Providing the desired joint part for joining
You may form so that it may join from a mechanical device side.

[0022]

As described above, according to the present invention, the outer peripheral surface of the inner pipe member made of polyvinyl chloride resin is coated with the heat insulation coating by spirally winding the band-shaped heat insulating material made of expanded polyethylene. Since the outer hose made of polyethylene resin is fused and integrated with the outer peripheral surface of the band-shaped heat insulator, the heat hose made of foamed polyethylene is integrally fused and formed on the outer hose. Therefore, there is no gap between the heat insulating material and the outer pipe material or between the heat insulating materials, and excellent heat insulating property can be maintained for a long period of time.

Further, since the spirally wound heat insulating material is fixed to the polyethylene resin outer pipe material by fusion bonding, the partition wall for preventing movement and displacement of the heat insulating material is used as an inner pipe material as in the conventional case. Since it is not necessary to provide the heat insulating hose with the outer pipe material, the manufacturing process of the heat insulating hose can be simplified and the productivity can be improved.

Further, since the inner pipe member is made of polyvinyl chloride resin, it has excellent flexibility and adhesive bondability, and the inner pipe member can be directly adhered and fixed to various joint members. With the joining member adhered to the inner pipe material, the joining portion to be joined to various devices such as an air conditioner can be easily integrated and formed.

Further, according to the invention of claim 2, in the heat insulating hose, a joining member formed of polyvinyl chloride resin is bonded and integrated to an end portion of the inner pipe material made of polyvinyl chloride resin. Since this is a feature, the joint part and the heat-insulating hose body are integrally bonded, and polyethylene, which is difficult to bond, is used as the outer pipe material, and a plurality of heat-insulating hoses are continuously bonded by a bonding member such as by fitting. This has the effect that it is possible to construct a full-scale heat insulating duct.

Further, when a hollow spiral ridge is provided on the outer peripheral surface of the inner pipe material and a core wire made of a polyolefin resin such as polypropylene is included in the hollow spiral ridge without being adhered, polychlorination is achieved. The inner tube made of vinyl resin is prevented from being deformed by compression, and is excellent in strength, and the overall flexibility is higher and more flexible than the conventional iron wire spliced. It has the advantage of not worrying about the occurrence of such problems.

[Brief description of drawings]

FIG. 1 is a partially enlarged sectional view of a heat insulating hose according to the present invention.

FIG. 2 is a partially cut sectional view illustrating a joint portion of the heat insulating hose of the present invention.

FIG. 3 is a partially cut sectional view showing the shape of another joint portion of the heat insulating hose of the present invention.

FIG. 4 is a partially cut sectional view for explaining another embodiment of the joint portion of the heat insulating hose of the present invention.

FIG. 5 is a sectional view illustrating an example of a conventional heat insulating hose.

[Explanation of symbols]

 A heat insulating hose 1 inner tube material 2 hollow spiral ridge 3 core wire 4 band heat insulating material 5 outer tube material 6 6'joining member 7 fitting groove portion 8 fitting joint portion 9 tubular joining member

Claims (2)

[Claims] 1. An outer peripheral surface of an inner pipe made of polyvinyl chloride resin is covered with a heat insulation material made of expanded polyethylene in a spiral shape and is heat-insulated, and a polyethylene resin is formed on the outer peripheral surface of the heat insulation material. A heat insulating hose in which an outer tube material made of is fitted and fused and integrated. 2. The heat insulating hose according to claim 1, wherein a joining member formed of polyvinyl chloride resin is adhesively integrated with an end portion of the inner pipe material made of polyvinyl chloride resin.