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

【発明の詳細な説明】 〔技術分野〕 本発明は、年間を通じてほぼ一定の土中温度（東京でｊ
ｌｌ下１０ｒｒＬにおいて約１４℃）を保っている地熱
を利用して冷暖房を行なうための土中熱交換装置に関す
る。[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.

〔背景技術〕[Background technology]

従来にあっては、第１図に示すように管路が略Ｕ字状に
屈曲した熱交換パイプ（１）を直接に土中に埋め込んで
いたが、第２図のように熱交換パイプ（１）の外周と土
（５）との間に空間（６）か生じ易く、この空気を保有
した断熱空間（６）のために熱抵抗が増えて熱交換パイ
プ（１）内と土中熱との熱交換効率が悪化するという欠
点があった。例えば、空間（６）の厚さがＯｍであれば
取得熱量が１００％であるものが、空間（６）の厚さが
２ｍ、４蔵では夫々８１％、６５％に低下する。この空
間（６）は熱交換パイプ（１）の上方では土庄のために
小さいか、熱交換パイプ（１）の下方ではその変形を防
ぐために土台（力を置いていたので、熱交換パイプ（１
）が沈下せず、空間（６）が次第に大きくなるという傾
回があった。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.

〔発明の目的〕[Purpose of the invention]

本発明は斜上の従来例の欠点に鑑みてなされたものであ
り、熱交換パイプを土中に埋込んだときに土との間で生
じる空間の発生をなくし、土と熱交換パイプとの間の熱
伝導を良くして冷暖房効率を向上させることを目的とす
る。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.

〔発明の開示〕[Disclosure of the invention]

（１）は管路が略ｔＪ字状に屈曲した金属製の熱交換パ
イプであり、Ａ１〜交換パイプ（１）の外層は全長に亘
って熱交換パイプ（１）の外径よりも径の大きな可撓性
を有する軟質フィルム製の軟質パイプ（２）ｉこより囲
繞されていて二重パイプ構造となっている。この熱交換
パイプ（１）は土（５）を掘って両端の細口（６）が地
表部に露出するように土台（力の上に納められ、土（５
）を埋め戻して土１月こ埋込まれる。次に、土（５）を
踏み固めた後、軟質パイプ（２）の一端から熱交換パイ
プ（１）外周と軟質パイプ（２）内周との間の空隙に流
動性を有する熱伝導性媒体（４）、例えば水を注入し、
ｌｉ′ＩＣ質パイプ（２）の両端を閉じて塞ぐ。これに
より軟質パイプ（２）が土（５）に密着させられ、軟質
パイプ（２）と熱交換パイプ（１）との間に熱伝導性媒
体（４）が充填されることになるので、熱が土中と熱交
換パイプ（１）内との間をスムーズに移肋できるように
なるのである。例えば、水を用いた場合、水の熱抵抗は
空気の２０分の１以下のため、水の層の厚さが４０あっ
ても空気の空間で厚さ０．２　ｒｍに相当する取得熱Ｐ
Ｃ９８％）となる。(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%).

この熱交換パイプ（１）は一方の管口（５）より空気又
は水を強制的に送り込まれ、土中において熱交換パイプ
（１）で地熱と熱交換され、夏期においては空気又は水
を冷却して他方の管口（３）より取り出して冷房用とし
て用いられ、冬期においては空気又は水を加温して暖房
用として用いられるものである。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.

〔発明の効果〕〔Effect of the invention〕

本発明は叙述の如く構成されているから、施工時に熱交
換パイプと土との間に生じる空間を軟質パイプ内に充填
した熱伝導性媒体により詰めて空気の空間を無くすこと
ができ、断熱空間の発生を阻止して熱交換（冷暖房）効
率を向上させることができる利点がある。又、熱伝導性
媒体は流動性を有しているために熱伝導性パイプを土中
に埋めた後軟質パイプ内に注入でき、施工が容易である
という利点がある。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.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来例の概略断面図、第２図は第１図のＸ−Ｘ
線拡大断面図、第６図は本発明の一実施例を示す概略断
面図、第４ｒｇＪは第６図のＹ−Ｙ線拡大断面図で−あ
る。 １’；１ｔ１１・・・熱交換パイプ、（２）・・・軟質
パイプ、（３）・・・管口、（４）・・・熱伝導性媒体
、（５）・・・土。 特１−１°出願人　川田裕部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)

【特許請求の範囲】[Claims] （１）管路が略Ｕ字状に屈曲した熱交換パイプの外周を
全長１こ亘って可撓性を有する軟質パイプにより囲繞し
、この熱交換パイプを土中に埋設して両端の管口を地表
部に露出させ、熱交換パイプ外周と軟性パイプ内周との
間に流動性を有する熱伝導性媒体を充填して軟質パイプ
外周を土に密着させて成る土中熱交換装置。(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.