JPH0847355A - Heat-insulating sheet used for case for tropical fish - Google Patents

Abstract

PURPOSE:To obtain a low cost heat-insulating sheet excellent in water resistance, stable in an equilibrium temperature at a low temperature, capable of being used for a long period without anxiety with a small consumption electric power, capable of being used also as a back sheet for coloring the scene of a transparent case, and used for the case for tropical fishes. CONSTITUTION:Carbon short fibers (1a)... are homogeneously dispersed and mixed in paper pulp in an electric current-applicable state to form a thin sheet (1). Belt-like electrodes (2), (2) are formed on both the right and left edges of the sheet. The sheet (1) containing the electrodes are covered and sealed with a waterproof thin insulating synthetic resin film (3). A lead wire (4) is extended from the electrodes (2),(2), and an electric connector (6) is disposed at the tip of the lead wire.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating sheet for a tropical fish case, and in particular, it can be used as a heating element for keeping the temperature of hot water in a transparent case for tropical fish constant and color the background of the transparent case. The present invention relates to a heat insulating sheet that can also be used as a back sheet.

[0002]

2. Description of the Related Art As a well-known heat generating unit, there is a nichrome wire or a copper-nickel alloy wire sealed with plastic. In such a heat generating unit, the equilibrium temperature at a low temperature of 100 degrees or less is difficult to stabilize, and since a large amount of current flows during heat generation, it consumes a large amount of power and is uneconomical. In addition, it has a short service life because it may be corroded by acid and alkali due to long-term use and may be broken. Therefore, such a heat generating unit has a complicated structure and becomes expensive in order to be adapted for underwater use, and the temperature of the hot water often rises too much, causing a problem that an expensive tropical fish is killed. Further, the heater used in the conventional case for tropical fish has an awkward tubular shape, which has a drawback that the aesthetic appearance of the case is impaired.

[0003]

Therefore, the present invention is excellent in waterproofness, has a stable equilibrium temperature at a low temperature, and can be used with peace of mind for a long period of time with little power consumption, and a background that colors the background of the transparent case. The main purpose is to provide a new heat insulating sheet that can be used as a sheet at a low cost.

[0004]

In order to achieve the above object, the present invention takes the following technical means. That is, in the heat insulating sheet according to the present invention, the thin sheet material (1) is formed by diffusing and mixing the carbon short fibers (1a) ... into the paper pulp in an evenly and electrically conductive state. Strip-shaped electrodes (2), (2) are formed on both left and right edges of the sheet material, and the sheet material (1) including these electrodes is hermetically covered with a waterproof thin insulating synthetic resin film (3). Cage, the electrode (2),
The lead wire (4) is extended from (2) and the electrical connector is
The structure is provided with (5).

[0005]

[Function] The heat insulating sheet (A) is used as a heat source for hot water by putting it in the tropical fish case (B). Especially, in this heat insulating sheet, both sides of the thin sheet material (1) are used. Since it has a structure in which it is covered and sealed with an insulating synthetic resin film (3), it can be made very thin. Therefore, by applying an appropriate color and pattern to this sheet, it can be used by sticking it to the inner surface of one side of the case (B). By doing so, it can also be used as a back sheet that colors the background of the tropical fish case, which makes it possible to improve the aesthetic appearance of the case by eliminating the conventional awkward cylindrical heater and secure a wide storage space for the case. You can

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention will be described below based on an embodiment shown in the drawings. 1 to 3 show an embodiment of a heat insulating sheet according to the present invention, and this heat insulating sheet (A)
Is a thin sheet material formed by diffusing carbon short fibers (1a) ... into paper pulp evenly and in an energizable state.
(1), plus and minus electrodes (2) and (2) formed in strips on both left and right edges of the sheet material (1), and the front and back of the sheet material (1) including these electrodes are hermetically covered. Formed of a thin insulating film (3). The film (3)
Is formed of a waterproof synthetic resin material such as polyethylene. In the embodiment of FIG. 3, the strip-shaped material serving as the electrodes (2) and (2) is formed so as to sandwich the front and back sides of the edge of the sheet material (1), but as shown in FIG. It may be attached to only one side of 1).

The means for producing the sheet material (1) is carried out in the conventional paper making process, but as the raw material of the paper pulp, fibers having relatively high strength such as mulberry and mitsumata are preferable. The short carbon fibers (1a) are carbonized by firing at a high temperature (1600 to 2000 degrees Celsius) and have a predetermined electric resistance value, and a desired electric resistance value can be easily set by voltage. it can. Also, it is very effective in that it has high heating efficiency and excellent service life due to the emission of far infrared rays.

Thus, the lead wire (4) is pulled out from the electrodes (2) and (2) of the sheet material (1), the switch (5) is provided at the middle portion of the lead wire (4), and the tip thereof is provided. An electrical connection (6) is provided. Although the plug is shown as the electric connecting device in the embodiments, the plug may be replaced with an outlet having a plug insertion hole.

Further, in this embodiment, the thermostat (7) is incorporated in the heat insulation sheet (A), and the electric circuit is formed so as to be turned on and off at the temperature set by the adjusting knob (8). .

Thermal insulation sheet (A) configured as described above
Is attached to one side inner surface of the transparent tropical fish case (B) as shown in FIG. This attaching means can be performed by, for example, a suction cup (9), but a clip or other means may be used. In addition, the role of the case (B) as a background sheet can be achieved by providing the film (3) with blue, light blue, or any other suitable color scheme or pattern.

Further, the heat insulating sheet (A) of the present invention may be rolled into a cylindrical shape or may be used as a heat source for hot water by immersing it in a flat plate state and immersing it in the bottom of the case (B). .

Although the embodiments considered to be typical of the present invention have been described above, the present invention is not necessarily limited to the structures of these embodiments, and has the constitutional requirements of the present invention and the object of the present invention. Can be carried out by appropriately modifying it within the range in which the following effects are achieved.

[0013]

As described above, according to the present invention, it is used as a heat source of hot water by being put in a tropical fish case. Particularly, in the present invention, both sides of a thin sheet material are insulated and synthesized. Since it has a structure in which it is covered and sealed with a resin film,
It can be formed very thinly.Therefore, it can be used as a back sheet to decorate the background of the tropical fish case by attaching it to the inner surface of one side of the case with a suitable color scheme and pattern, and thereby It is possible to improve the aesthetic appearance of the case by eliminating the conventional awkward tubular heater and to secure a wide storage space for the case. In addition, in the heat insulating sheet of the present invention, by using the carbon short fibers incorporated in the paper pulp as the heat generating medium, the equilibrium temperature at a low temperature is stable and can be used safely for a long time, and the hot water rises abnormally. It is possible to prevent troubles such as rusting etc., can be economically used with low power consumption, and further, the inner sheet material is completely sealed with a waterproof insulating synthetic resin film. Therefore, there are various excellent effects such that the heating element is not corroded by an acid or an alkali even if it is used for a long time in water and the wire is not broken.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a heat insulating sheet according to the present invention.

FIG. 2 is a partially cutaway plan view of the heat insulating sheet.

FIG. 3 is an enlarged cross-sectional view taken along the line CC of FIG.

FIG. 4 is a sectional view similar to FIG. 3, showing another embodiment of the heat retaining sheet.

[Explanation of symbols]

 (1) Sheet material (1a) Short carbon fiber (2) Electrode (3) Insulating synthetic resin film (4) Lead wire (5) Switch (6) Electrical connection tool (A) Thermal insulation sheet (B) Case

Claims (1)

[Claims] 1. A thin sheet material in which short carbon fibers (1a) are uniformly dispersed in a paper pulp in a state in which electricity can be applied.
(1) is formed, strip-shaped electrodes (2), (2) are formed on both left and right edges of the sheet material, and the sheet material (1) including these electrodes is a thin insulating synthetic material having waterproofness. Sealed with a resin film (3), the electrodes (2), (2) to the lead wire (4)
A thermal insulation sheet for a case for tropical fish, which is extended and provided with an electrical connector (6) at its tip.