JPH10204943A - Cover for piping - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve freezing prevention function by embracedly holding a piping with heat accumulating material vessels receiving heat accumulating material having specific phase change temperature, and winding a heater around the outer circumference. SOLUTION: Heat accumulating material 3 of which the phase change temperature 15 about -2 deg.-10 deg.C 15 received in a pair of heat accumulating material vessels 2 having curved faces along the circumferential surface of a piping 1. Next, after sandwiching the piping 1 for feeding hot or cold water made of copper pipe with the vessels 2 from both sides, a heater 4 is wound around the outer circumference, and further if necessary, a layer of heat insulating material is provided on the outer circumference. In this case, recessed and projecting parts 6 are formed on the outer circumference of the vessels, and the heater 4 is helically wound along the recessed and projecting parts 6. A filling port of the heat accumulating material is provided on the upper part of the vessel 2. After current is carried to the heater so as to accumulate heat in the heat accumulating material, the heater is set OFF and freezing is prevented. Hereby, in one's absence, freezing can be prevented without carrying current, in addition current carrying accident can be prevented, heat transfer efficiency can be improved, and further it can be simply executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe cover. More specifically, the invention of this application is useful for preventing freezing of indoor piping in cold regions, etc.
It is about a new piping cover.

[0002]

2. Description of the Related Art Water in indoor piping such as bathrooms, wash units, and toilets may freeze in winter in cold regions. Therefore, measures such as arranging the pipe not on the outer wall side but on the room partition side have been taken. However, there has been a problem that such an arrangement is limited by the structure of a building such as a house, layout circumstances, and the like.

[0003] Therefore, conventionally, it has been practiced to provide a heat insulating layer around the pipe or to wind a cord or a ribbon-shaped heater around the pipe to prevent freezing.

[0004]

However, even if a heat insulating layer is provided around the pipe, it is not effective in preventing freezing by itself. Actually, for example, taking the piping of a bathroom unit as an example, as shown in FIG.
When a 30 mm thick urethane foam heat insulating material is provided around the copper tube of 5.8, the outer wall heat insulating material G. W. (Glass wool) is pressed down by a pipe to have a thickness of about 24 mm. Then, since the pipe is insulated, heat from the high-temperature unit is shut off, and the inside of the pipe indicates a temperature between the outside air temperature and the unit temperature. For example, if the outside air temperature is −20 ° C. and the unit temperature is 5 ° C., the temperature in the pipe becomes −5 ° C. For this reason, freezing cannot be prevented only by heat insulation of the piping.

[0005] In addition, the freezing prevention method in which a heater is wound around a pipe has a problem in that the heater may be operated when it is absent and an accident may occur. Therefore, the invention of this application solves the above-mentioned drawbacks of the conventional anti-freezing method for piping, and appropriate and effective anti-freezing is made as a simple construction, and there is no worry about accidents. It aims to provide a new technical means of.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem by providing a pipe cover disposed around a hot or cold water supply pipe, which sandwiches the pipe from both sides. Having a curved surface along the circumference of the piping for
A pipe cover is provided, wherein a plurality of heat storage material containers for storing a heat storage material is provided therein, and a heating heater is wound around the outer periphery of the heat storage material container sandwiching the pipe.

Further, the invention of this application is characterized in that the heat storage material has a phase change temperature of about −2 ° C. to 10 ° C., a heat insulating material layer is further provided on the outer periphery of the heater, and The heat storage material container is provided with irregularities on the outer peripheral surface thereof, and the pipe cover on which the heater is wound along the irregularities and the irregularities on the outer peripheral surface are provided with the pipe cover provided so that the heater is spirally wound. In a pipe cover in which piping is sandwiched by two heat storage material containers, the two heat storage material containers are pipe covers that are movably connected to each other at one end of each curved surface, and the heat storage material container is: As an embodiment, a pipe cover or the like having a heat storage material inlet at an upper portion thereof and having an upper air layer after the heat storage material stored therein is provided therein.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention of this application is composed of a pipe cover having the above-mentioned features. Examples will be shown below and embodiments of the invention will be described in more detail.

[0009]

FIG. 1 is a perspective view illustrating a pipe cover according to the present invention. For example, as exemplified in FIG. 1, the pipe cover according to the present invention extends along the circumferential surface of the pipe (1) for sandwiching the hot or cold water supply pipe (1) made of copper pipe from both sides. Heat storage material containers having curved surfaces (2)
A heat storage material (3) having a phase change temperature in a range of about −2 ° C. to 10 ° C. is stored in the heat storage material container (2).

[0010] A heating heater (4) is wound around the outer periphery of the heat storage material container (2) sandwiching the pipe as shown in FIG. 1, and further around the heating heater (4), FIG. As shown, a layer of thermal insulation (5) is provided. Further, in this example, the heat storage material container (2) has irregularities (6) on its outer periphery as illustrated in FIG. 3 together with FIGS. 1 and 2, and along the irregularities (6). The heater (4) can be spirally wound, for example. Furthermore, a heat storage material filling port (7) is provided in the upper part of the heat storage material container (2).

As the heat storage material (3), a material obtained by mixing a supercooling inhibitor with water (phase transition temperature: 0 ° C.) or sodium sulfate 1
0 water salt mixture (phase transition temperature 5 ° C. to 9 ° C.) and the like. Since the heat storage material (3) becomes liquid when heated, it is sealed in the heat storage material container (2). As the container (2), various containers such as resin containers of polyethylene and polypropylene and resin film bags can be used. Still water in the pipe (1) usually undercools and does not start freezing until the temperature becomes lower than -4 ° C. In order to prevent cooling to this temperature, the phase change temperature of the heat storage material (3) is desirably about −2 to 10 ° C.
In order to surely prevent freezing, it is desirable that the change temperature of the heat storage material (3) is preferably -1 ° C or more.

The temperature of tap water may drop to about 3 ° C. in winter, and even in such a case, the irregularities are formed on the outer peripheral side of the heat storage material container (2) as described above so that heat can be stored in the heat storage material (3). (6) is formed, and a heater (4) for heating is provided on the uneven portion (6) to store heat. The irregularities (6) are preferably formed so that the cord heater (4) can be spirally wound as a whole. Further, it is preferable that the heat storage material container (2) can be divided into at least two as shown in FIGS. 1 and 3 so that the heat storage material container (2) can be easily installed on the pipe (1).

It is effective to provide a heat insulating material layer around the heat storage layer as shown in FIG. As the heat insulating material (5), various kinds of foamed polyethylene, urethane foam, glass wool, rock wool and the like can be used, but from the viewpoint of heat insulating performance, the thermal conductivity is desirably 0.1 W / mk or less. The thickness of the heat insulation layer is 2 in consideration of the heat insulation performance and the pipe storage in the wall.
About 30 mm is desirable.

[0014] The heat storage material container (2) may be divided into two or more, but two cases are convenient for construction.
However, in any case, when the pipe (1) is sandwiched, it is necessary to fix these containers (2) to each other. As means for that, it is also possible to wind the heater (4), or to wind another wire, cord, ribbon, or the like other than the heater (4). Alternatively, means for fitting unevenness, pins and holes, engaging means for hooks and steps, and the like may be appropriately provided at the mutual connection portion of the container (2).

In order to prevent the curved surface (21) of the container (2) shown in FIG. 3 from slipping, the curved surface (21) may be roughened or provided with small irregularities to form a pipe ( 1) The friction on the outer peripheral surface may be increased. The heater (4) may be a so-called cord heater, a ribbon heater, or the like.

According to the invention of this application exemplified as described above, heat can be stored in the heat storage material (3) by energizing the heater (4), and freezing is prevented for a long time even when the heater (4) is turned off. it can. Since the heat storage material container (2) is formed with irregularities (6) for winding the heater (4), the construction is simple, the heat transfer efficiency is good, and the container strength is increased. Compared to a freeze prevention device that uses only a heater, there is no risk of an accident due to turning on the heater when not present.

FIG. 4 shows another embodiment.
In this example, two heat storage material containers (2) are movably connected to each other at one side end (22) of the curved surface, and the other side end (23) is in a free state. . With the side end (23) opened, it is mounted on the pipe (1) and the container (2) is rotated at the movably connected side end (22) so as to sandwich the pipe (1). . With such a heat storage material container (2), simpler construction is possible, and one of the heat storage material containers (2) required for combination is provided.
There is no worry that the construction will be lost and will not be possible.

In the case of the heat storage material container (2), depending on the type and amount of the heat storage material (3) to be housed therein, when the heat storage material (3) is used for a pipe cover, the heat storage material (3) expands due to a change in temperature. Leakage of material (3) from container (2),
Alternatively, it is not inconceivable that the container (2) may be damaged. In most cases, such a concern is actually not a problem. However, when a complete countermeasure is taken, the expansion of the heat storage material (3) may be absorbed. For example, as shown in the perspective view of FIG. 5 and the plan view of FIG. 6, a heat storage material container is fitted as a two-part unit having a stepped uneven portion (24) at the connection side end. Taking (2) as an example, the heat storage material injection port (2
5) is arranged so that an air layer is present above the container (2) when the heat storage material is filled.

FIG. 7 shows an example of the heat storage material container (2) as a cross section. In the heat storage material inlet (25) at the upper part of the heat storage material container (2), the heat storage material container (2) has an inlet (251). , An aluminum film or other sealing material (252) is provided,
A cap (253) is provided from above. Then, inside this container (2), the air layer (26) is made to exist even when the heat storage material (3) is filled. With this structure, the sealing material (252) is peeled off after the pipe cover is applied, and the inside of the container (2) is open to the atmosphere, and the heat storage material (3) does not leak.

The sealing material (252) is for preventing leakage during transportation. Similarly, a structure as shown in FIG. 8 may be used. A retaining cap (253) having a communication port (254) to the atmosphere is provided, and a sealing material (252) is attached before the construction. In the case of the structure of FIG. 9, the ball (255) opens and closes the communication port (254) of the cap (253). That is, when the heat storage material (3) expands, the heat storage material (3) rising through the opening of the ring (256) pushes up the ball (255) to close the communication port (254) to the atmosphere, thereby preventing leakage. On the other hand, during contraction, the ball (255) descends and the ring (2)
56). At this time, air enters the container (2).

In any of the above cases, the heat storage material container (2) can absorb the expansion of the heat storage material (3). This effectively prevents the container from being damaged or leaked due to the expansion of the heat storage material (3). In order to increase the strength of the container (2), as shown in FIGS. 7 and 10, irregularities (27) may be provided at the bottom. Then, as shown in FIG. 10, unevenness (28) may be formed on the surface in contact with the pipe (1).

Of course, the invention of this application is not limited by the above examples. Various details are possible in the configuration of the details.

[0023]

As described above in detail, water in winter piping may freeze in a cold place in the piping of a bathroom or a washing unit, but according to the invention of this application,
By energizing the heater, heat can be stored in the heat storage material, and freezing can be prevented for a long time even when the heater is turned off. Since the heat storage material container is formed with irregularities around the heater, the construction is simple, the heat transfer efficiency is good, and the strength of the container is increased. Compared to a freeze prevention device that uses only a heater, there is no risk of an accident due to turning on the heater when not present.

[0024] The container itself has a structure capable of absorbing the expansion of the heat storage material, so that damage to the container and leakage of the heat storage material due to expansion due to temperature change of the heat storage material can be effectively prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of FIG.

FIG. 3 is a perspective view illustrating a heat storage material container.

FIG. 4 is a perspective view showing another embodiment of the present invention.

FIG. 5 is a perspective view illustrating a heat storage material container.

FIG. 6 is a plan view corresponding to FIG.

FIG. 7 is a cross-sectional view of a container illustrating an expansion absorbing structure of a heat storage material.

FIG. 8 is a cross-sectional view of a main part illustrating a structure different from that of FIG. 7;

FIG. 9 is a cross-sectional view of a main part illustrating still another structure.

FIG. 10 is a cross-sectional view showing an example of the outer shape of the container.

FIG. 11 is a cross-sectional view showing a structure for preventing freezing of a conventional pipe.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 piping 2 heat storage material container 3 heat storage material 4 heater 5 heat insulating material 6 unevenness 7 heat storage material filling port 21 curved surface 22 movably connected side end 23 free side end 24 unevenness 25 heat storage material injection port 26 air layer 27, 28 unevenness 251 Inlet 252 Seal material 253 Cap 254 Communication hole 255 Ball 256 Ring

Claims (7)

[Claims] 1. A pipe cover disposed around a hot or cold water supply pipe, the pipe cover having a curved surface along a circumferential surface of the pipe for sandwiching the pipe from both sides. A pipe cover comprising a plurality of heat storage material containers each containing a heat storage material, wherein a heating heater is wound around an outer periphery of the heat storage material container sandwiching the pipe. 2. The heat storage material has a phase change temperature of −2 ° C. to 1 ° C.
The piping cover according to claim 1, wherein the temperature is about 0 ° C. 3. The pipe cover according to claim 1, wherein a heat insulating material layer is provided on an outer periphery of the heater. 4. The pipe cover according to claim 1, wherein the heat storage material container has irregularities on the outer peripheral surface thereof, and the heater is wound along the irregularities. 5. The piping cover according to claim 4, wherein the unevenness on the outer peripheral surface is provided so that the heater is spirally wound. 6. The pipe cover according to claim 1, wherein the pipe is sandwiched by the two heat storage material containers, wherein the two heat storage material containers are movably connected to each other at one end of each curved surface. Plumbing covers. 7. The pipe cover according to claim 1, wherein the heat storage material container has a heat storage material inlet at an upper portion thereof, and has an upper air after storing the heat storage material therein. Piping cover provided with layers.