JPS6338295B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a heat insulating material with excellent heat generation effect.

[Prior art and its problems]

Traditionally, glass wool, rock wool,
Alternatively, foamed plastic or the like is used. However, the insulation effect of these insulation materials was not sufficient.

[Means for solving problems]

An object of the present invention is to provide a heat insulating material that prevents heat transfer due to heat conduction, heat convection, and heat radiation, and achieves an excellent heat insulating effect. A large number of air chambers, which are independent from each other and open at the top, are formed on at least one of the front and back surfaces of the sheet-like main body by walls having a rigidity that does not collapse when used as a heat generating material, Furthermore, it is characterized in that aluminum foil is attached to at least one of the front and back surfaces of the sheet-like main body.

[Effect]

The heat insulating material of the present invention has air chambers that are reliably scattered when the heat insulating material is in use, and the aluminum foil attached to the sheet-like body allows for heat conduction, heat convection, etc.
It has an excellent insulation effect by preventing heat transfer due to thermal radiation.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

In the figure, reference numeral 1 denotes a sheet-like main body, and a large number of air chambers R, which are independent from each other and open at the top, are formed on the upper surface side of the main body. In this example, the sheet-like main body 1 is an integrally molded product made of transparent plastic or the like, and has a cylindrical wall portion 1b protruding from the upper surface of the sheet-like portion 1a. The enclosed space is defined as an air chamber R. An aluminum foil 2 is attached to the lower surface of this sheet-like main body 1. In this way, the heat insulating material 3 is constituted by the sheet-like main body 1 and the aluminum foil 2. By the way, the wall portion 1b of the sheet-like main body 1 has enough rigidity to not collapse when the heat insulating material 3 is in use. In other words, the heat insulating material 3 is used in a form that is interposed between two objects that are to prevent heat transfer, and the wall portion 1b is not crushed in the state of use, but maintains the state in which the air chamber R is formed. It has enough rigidity to maintain the Therefore, the material, wall thickness, etc. of the wall portion 1b are set according to the usage conditions of the heat insulating material 3, and suitable rigidity is provided.

The thus constructed heat insulating material 3 is used, for example, as a heat insulating material covering the conduit 4 as shown in FIG. The conduit 4 is one in which a heat medium such as high temperature water or low temperature water flows,
For example, it is made of copper, other metals, vinyl chloride, etc. The circumference of this conduit 4 is first covered with a heat insulating tape 5, and then a heat insulating material 3 is attached to cover the tape. The insulation tape 5 is
It is made by attaching aluminum foil or vapor-depositing aluminum to the outer peripheral surface of a heat-resistant and heat-retaining material such as Tetron nonwoven fabric, glass cloth, or plastic fiber such as polyester. The heat insulating material 3 is attached with the air chamber R on the inner circumferential side and the aluminum foil 2 on the outer circumferential side. As a result, the upper opening of the air chamber R is closed with the heat insulating tape 5, and each air chamber R becomes an independently closed space. In this example, the aluminum foil 2 of the insulation material 3
The inner surface is said to be shiny.

Further, the outer periphery of the heat insulating material 3 is covered with a heat insulating tape 6 similar to the heat insulating tape 5 described above and an outer covering 7. The outer covering 7 is intended to further enhance the heat insulating effect and protect the inner part of the covering, and is made of polyester resin or the like having both heat insulating properties and strength.

The heat insulating material 3 covering the circumferential portion of the conduit 4 thus prevents the transfer of heat due to heat conduction, heat convection, and heat radiation, and achieves an excellent heat insulating effect as described below.

That is, the heat insulating material 3 and the heat insulating tape 5 inside the heat insulating material 3
Since the contact surface with the heat insulating material 3 is only the upper edge of the air chamber R, the heat transfer area is made small and the amount of heat transfer is reduced. This heat transfer is from the inside to the outside when a high temperature heat medium is passed through the conduit 4, and from the outside to the inside when a low temperature heat medium is passed through the conduit 4. . In addition, there is a lot of air inside the air chamber R and between the heat insulating material 3 and the heat insulating tape 5 inside it,
This acts as a poor conductor of heat, further reducing heat transfer. Furthermore, since the air chambers R are independent from each other, the air in each air chamber R does not circulate through each other due to convection, and the air that exists between the heat insulating material 3 and the heat insulating tape 5 on the inside thereof is The air chamber R prevents movement and no convection occurs. Therefore,
The amount of heat transferred by convection is also extremely small. Moreover, the aluminum foil 2 of the heat insulating material 3 suppresses heat radiation. In this example, since the inner surface of the aluminum foil 2 is a glossy surface, when a high-temperature heat medium is passed through the conduit 4, radiant heat from the conduit 4 side to the outside is radiated to the inside of the aluminum foil 2. The transmission of the radiant heat is suppressed by being reflected by the shiny surface of the In this respect, it is extremely advantageous for the sheet-like main body 1 to be transparent in terms of heat radiation.

Moreover, since the wall portion 1b forming the air chamber R in the heat insulating material 3 has enough rigidity to not be crushed under such usage conditions, the air chamber R does not deform significantly and can be used as a similar cylindrical chamber. exist. Therefore, the heat insulating material 3 uniformly and reliably performs the above-mentioned heat insulating effect around the conduit 4 due to the air chambers R having the same shape and certainly existing. By the way, when the air chamber R in the heat insulating material 3 is formed as a sealed air chamber by a polyethylene film with a thickness of about 200μ, that is, in the case where the air chamber R in the heat insulating material 3 of the present invention is sealed with the upper part closed. If the air chamber is formed in advance from a material with weak strength, the air chamber is likely to deform and collapse due to static loads when used wrapped around the conduit 4, and the air inside may escape. There is. In addition, when mass producing a conduit 4 wrapped with a heat insulating material having such a sealed air chamber, when the conduit 4 wrapped with the heat insulating material is passed between feed rollers and guide rollers in the mass production line. The sealed air chamber is easily crushed, and the air inside may escape, which may result in the insulating effect not being achieved as expected. In this respect, it is effective that the air chamber R of the heat insulating material 3 of the present invention has an upper opening type, and that the wall portion 1b forming the air chamber R is given a predetermined rigidity.

Furthermore, in the present embodiment shown in FIG.
Since the heat insulating tapes 5 and 6 and the outer covering 7 are placed around the heat insulating tapes 5, 6 and the outer covering 7, the heat insulating effect is also added. In the heat insulating tapes 5 and 6 as well, by making the inner surface of the aluminum foil therein a glossy surface, it is possible to expect the same reflection of radiant heat as in the above-mentioned heat insulating material 3.

By the way, in the above embodiment, the inner surface of the aluminum foil 2 in the heat insulating material 3 is made into a glossy surface, but the outer surface may be made into a shiny surface.
It is possible to suppress the radiation intensity of heat from the inside to the outside. Naturally, both the inner and outer surfaces of the aluminum foil 2 may be glossy surfaces. Further, in the cross-sectional tapes 5 and 6 as well, by making the outer surface of the aluminum foil therein a glossy surface, the radiation intensity of heat to the outside can be suppressed to a low level similarly to the heat insulating material 3.

Next, another example of a coated conduit provided with the heat insulating material 3 of the present invention will be described. Note that in the following examples, parts similar to those in the above example are given the same reference numerals.

The coated conduit shown in FIG. 4 has a spacer 8 interposed between the two conduits 4, 4, and both of these conduits 4, 4 are coated simultaneously in the same manner as in the above embodiment.

The coated conduit shown in FIG.
The entire structure is covered with an outer coating 7.

The coated conduits shown in FIGS. 6 to 8 are modified examples of the coated conduits shown in FIGS. 3 to 5, and have triangular cross-sectional protrusions extending in the axial direction on the inner circumferential surface of the outer sheath 7. 7a are formed adjacent to each other in the circumferential direction. In this case, the contact area between the heat insulating tape 6 and the external covering 7 can be reduced, and since there is a space between the adjacent protrusions 7a, 7a and the heat insulating tape 6, the heat insulating effect can be further improved. It can be made into something big.

The coated conduits shown in FIGS. 9 to 11 are modified examples of those shown in FIGS. 6 to 8, respectively, and have so-called knurled concavities and convexities formed on the outer periphery of the outer sheath 7. This is intended to improve the aesthetic appearance by making wrinkles and the like on the surface of 7 less noticeable.

The coated conduits shown in FIGS. 12 and 13 are modified examples of the coated conduits shown in FIGS. 3 and 4, respectively, and by forming an annular groove 7b on the outer periphery of the outer sheath 7, It is possible to easily bend the coated conduit without substantially impairing its strength against external pressure 7, and to reduce the gap 9 between the outer sheath 7 and the heat insulating tape 6.
By forming this, the insulation properties are further improved.

The coated conduit shown in FIG.
is provided so that a gap 11 is formed between its inner periphery and the outer covering 7.

The coated conduits shown in FIGS. 15 to 17 are modified examples of the coated conduits shown in FIGS. 6 to 7, and have a corrugated tube 10 having an annular groove 10a on the outer periphery on the outside of the outer sheath 7. is provided so that a gap 11 is formed between its inner periphery and the outer covering 7.

In each of the above embodiments, the air chamber R is provided on one side of the sheet-like main body 1, but the air chamber R may be provided on both sides of the main body 1, and the sheet-like main body 1 may be formed by integral molding. It is not limited to a product, and may be a joined structure of multiple members. Also, air chamber R
The cross-sectional shape of the air chambers R can be arbitrary, such as circular, square, or rhombic, and the arrangement of the air chambers R can be arbitrary, such as regularly scattered like a staggered pattern, or irregularly scattered. Further, the aluminum foil 2 may be attached to the surface of the sheet-like main body 1 on the air chamber R side, or may be attached to both sides of the main body 1. Also,
In the embodiments shown in FIGS. 3, 5, and 14, it is appropriate to make the inner surface of the aluminum foil 2 a glossy surface in order to keep the heat radiation level low.

Furthermore, when the present heat insulating material 3 is provided around the conduit 4, the air chamber R may be placed on the outside, and it goes without saying that the present insulating material 3 can be widely applied as a heat insulating material other than the heat insulating material for the conduit 4. be.

〔Effect of the invention〕

As explained above, the heat insulating material according to the present invention forms a large number of air chambers that are independent from each other and are open at the top on at least one of the front and back surfaces of the sheet-like main body, and Since it has a structure in which aluminum foil is attached to at least one surface, it can prevent heat transfer due to thermal conduction, thermal convection, and thermal radiation, and can achieve an excellent heat insulating effect.

Moreover, the walls of the sheet-like main body that form the air chambers are given enough rigidity to not collapse when the insulation material is used, so all the air chambers have the same shape and are reliably present, ensuring that the desired insulation is achieved. The effect can be achieved reliably.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, in which FIG. 1 is a perspective view, FIG. 2 is a longitudinal sectional view, and FIGS. A in each figure is a partially cutaway perspective view, and B in each figure is a sectional view taken along the line X--X of A in each figure. 1... Sheet-like main body, 2... Aluminum foil, 3...
Insulation material, 4... conduit, R... air chamber.

Claims (1)

[Claims] 1. On at least one of the front and back surfaces of the sheet-like main body, a large number of air chambers that are independent from each other and open at the top are formed by walls having a rigidity that does not collapse when used as a heat insulating material, The heat insulating material further comprises aluminum foil attached to at least one of the front and back surfaces of the sheet-like main body.