JPS6093261A - Geothermic exchanging device - Google Patents

Abstract

PURPOSE:To improve heat conductivity between soil and a heat exchanging pipe and increase room cooling and heating efficiency by a method wherein generation of spaces, generated between the heat exchanging pipe and soil upon burying the heat exchanging pipe into the soil, is reduced. CONSTITUTION:The outer periphery of the heat exchanging pipe 1, made of a metal bent into U-shape substantially, is surrounded with a soft pipe 2, having flexibility along the whole length thereof, and the heat exchanging pipe is made by a double pipe structure. The heat exchanging pipe 1 is put on bases 7 so as to expose both openings 3 of the pipe above the surface of ground and is buried into the ground. Heat conductive medium 4, having fluidity such as water for example, is poured into a space between the outer periphery of the heat exchanging pipe 1 and the inner periphery of the soft pipe 2 from one end of the soft pipe 2 and, then, both ends of the soft pipe 2 are closed. According to this method, the soft pipe 2 is contacted with the soil 5 closely and generation of heat insulating space is precluded, therefore, heat exchanging (room heating and cooling) efficiency may be improved.

Description

[Detailed Description of the Invention] [Technical Field] The present invention is directed to a soil temperature that is almost constant throughout the year (in Tokyo).
The present invention relates to an underground heat exchange device for heating and cooling using geothermal heat, which maintains a temperature of about 14°C at 10rrL.

[Background technology]

Conventionally, as shown in Figure 1, a heat exchange pipe (1) with a substantially U-shaped conduit was directly buried in the soil, but as shown in Figure 2, a heat exchange pipe (1) A space (6) is likely to be formed between the outer periphery of 1) and the soil (5), and because of this insulating space (6) that holds air, thermal resistance increases and heat is transferred between the inside of the heat exchange pipe (1) and the soil. The disadvantage was that the heat exchange efficiency with the For example, if the thickness of the space (6) is Om, the amount of heat acquired is 100%, but when the thickness of the space (6) is 2 m and 4 storages, the amount of heat obtained decreases to 81% and 65%, respectively. This space (6) is either small above the heat exchange pipe (1) due to the Tonosho, or below the heat exchange pipe (1) because the base (force was placed) to prevent its deformation.
) did not sink and the space (6) gradually became larger.

[Purpose of the invention]

The present invention was made in view of the drawbacks of the conventional example of sloped construction, and eliminates the space created between the soil and the heat exchange pipe when the heat exchange pipe is buried in the soil. The purpose is to improve heating and cooling efficiency by improving heat conduction between the two.

[Disclosure of the invention]

(1) is a metal heat exchange pipe with a conduit bent in a substantially tJ shape, and the outer layer of A1 to exchange pipe (1) has a diameter smaller than the outer diameter of the heat exchange pipe (1) over the entire length. It is surrounded by flexible pipes (2) made of flexible film and has a double pipe structure. This heat exchange pipe (1) is placed on a foundation (forced) by digging the soil (5) so that the narrow openings (6) at both ends are exposed on the ground surface.
) will be backfilled and buried in soil in January. Next, after compacting the soil (5), a fluid thermally conductive medium is introduced from one end of the soft pipe (2) into the gap between the outer periphery of the heat exchange pipe (1) and the inner periphery of the soft pipe (2). (4), for example, injecting water,
Close both ends of the li'IC pipe (2). As a result, the soft pipe (2) is brought into close contact with the soil (5), and the space between the soft pipe (2) and the heat exchange pipe (1) is filled with a thermally conductive medium (4). can be smoothly transferred between the soil and the inside of the heat exchange pipe (1). For example, when using water, the thermal resistance of water is less than one-twentieth that of air, so even if the thickness of the water layer is 40 mm, the acquired heat P corresponding to the thickness of 0.2 rm in the air space is
C98%).

Air or water is forced into this heat exchange pipe (1) from one pipe port (5), and heat is exchanged with geothermal heat in the heat exchange pipe (1) underground, cooling the air or water in the summer. It is then taken out from the other pipe port (3) and used for cooling purposes, and in winter it is used for heating air or water by heating it.

〔Effect of the invention〕

Since the present invention is constructed as described above, the space created between the heat exchange pipe and the soil during construction can be filled with a thermally conductive medium filled in the soft pipe, thereby eliminating air space. This has the advantage of preventing the occurrence of heat exchange and improving heat exchange (cooling and heating) efficiency. Further, since the thermally conductive medium has fluidity, it can be injected into the soft pipe after the thermally conductive pipe is buried in the soil, which has the advantage of easy construction.

[Brief explanation of the drawing]

Figure 1 is a schematic cross-sectional view of the conventional example, and Figure 2 is the line XX in Figure 1.
FIG. 6 is a schematic sectional view showing an embodiment of the present invention, and 4rgJ is an enlarged sectional view taken along YY line in FIG. 6. 1'; 1t11...Heat exchange pipe, (2)...Soft pipe, (3)...Pipe opening, (4)...Thermally conductive medium, (5)...Soil. Special 1-1° Applicant Hirobe Kawada

Claims (1)

[Claims] (1) The outer periphery of the heat exchange pipe, which has a substantially U-shaped conduit, is surrounded by a flexible soft pipe over the entire length, and this heat exchange pipe is buried in the soil, with pipe ports at both ends. This is an underground heat exchange device that is made of a heat exchange pipe that is exposed to the ground surface, and a fluid thermally conductive medium is filled between the outer periphery of the heat exchange pipe and the inner periphery of the flexible pipe, so that the outer periphery of the flexible pipe is brought into close contact with the soil.