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JP4417335B2 - Freezer refrigerator - Google Patents

Freezer refrigerator Download PDF

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Publication number
JP4417335B2
JP4417335B2 JP2006040242A JP2006040242A JP4417335B2 JP 4417335 B2 JP4417335 B2 JP 4417335B2 JP 2006040242 A JP2006040242 A JP 2006040242A JP 2006040242 A JP2006040242 A JP 2006040242A JP 4417335 B2 JP4417335 B2 JP 4417335B2
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insertion portion
heat
refrigerator
outer box
inner box
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JP2007218509A (en
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恵美 多ヶ谷
悟 平國
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Description

本発明は、冷凍冷蔵庫に係り、より詳しくは、冷凍冷蔵庫の断熱箱体の前面開口部における断熱構造に関するものである。   The present invention relates to a refrigerator-freezer, and more particularly to a heat-insulating structure in a front opening of a heat-insulating box of a refrigerator-freezer.

従来の冷蔵庫の冷媒管固定装置に、冷凍冷蔵庫の外箱と内箱の間の断熱材注入空間と、外箱の前縁に形成した係合溝内とを小孔で連通し、この小孔から係合溝内に発泡液を注入して硬化させ、冷媒管支持部材としたものがある(例えば、特許文献1参照)。   The conventional refrigerant pipe fixing device of the refrigerator communicates with a small hole between the heat insulating material injection space between the outer box and the inner box of the refrigerator and the engagement groove formed at the front edge of the outer box. In some cases, a foaming liquid is injected into the engaging groove and cured to form a refrigerant tube support member (see, for example, Patent Document 1).

また、開口部内周面に形成した環状溝内に凹溝を有する断熱帯を嵌挿した外箱を有し、開口部外周に形成したフランジ部を断熱帯の凹部内に挿入した内箱を備えた冷蔵庫の断熱箱がある(例えば、特許文献2参照)。   In addition, it has an outer box in which a heat insulating band having a concave groove is fitted in an annular groove formed on the inner peripheral surface of the opening, and an inner box in which a flange formed on the outer periphery of the opening is inserted into the concave portion of the heat insulating band. There is a heat insulation box of a refrigerator (see, for example, Patent Document 2).

実開昭58−020886号公報(第1頁、図3)Japanese Utility Model Publication No. 58-020886 (first page, FIG. 3) 実開昭54−008163号公報(第1頁、図2)Japanese Utility Model Publication No. 54-008163 (first page, FIG. 2)

冷凍冷蔵庫では冷却器が庫内の熱量を吸収して冷却しているため、庫外から庫内に熱量が入ると庫内の温度が上昇し、その分、冷却器は余計に吸熱しなければならなくなる。このように、庫外から庫内へと入る熱量を熱ロスといい、熱ロスを少なくすれば、冷却器が吸熱する熱量も減り、圧縮機の運転負荷も減って、省エネルギーになる。   In refrigerators and refrigerators, the cooler absorbs the amount of heat in the cabinet and cools it. Therefore, if the amount of heat enters the cabinet from outside the cabinet, the temperature inside the cabinet rises, and the cooler must absorb more heat. No longer. In this way, the amount of heat entering from the outside to the inside of the chamber is called heat loss. If the heat loss is reduced, the amount of heat absorbed by the cooler is reduced, the operating load of the compressor is reduced, and energy is saved.

特許文献1にかかる従来の冷蔵庫の冷媒管固定装置は、外箱は扉パッキン内部に設けられたマグネットが吸着可能な金属板によって形成されているため熱の伝導がよく、また、前面開口部は庫内に臨む形状となるため、内箱の端縁を支持部材で支持しているものの、これのみでは熱ロスを防ぐのには充分ではなく、外箱と内箱の結合部等を伝わって庫外から庫内に進入する熱ロスが発生していた。また、外箱の挿着部に設けられた露付き防止用の放熱パイプと内箱挿入部が近接していると、放熱パイプからの熱が内箱を伝わって庫内に入り、熱ロスとなる場合があった。
また、特許文献2にかかる従来の断熱箱は、内箱と外箱とを断熱するものの、電熱ヒータを構成要件としていない。
In the conventional refrigerant pipe fixing device for a refrigerator according to Patent Document 1, the outer box is formed of a metal plate that can adsorb a magnet provided inside the door packing, so that heat conduction is good, and the front opening is Because it is shaped to face the interior, the edge of the inner box is supported by a support member, but this alone is not sufficient to prevent heat loss, and it is transmitted through the joint between the outer box and the inner box There was a heat loss that entered the cabinet from outside. In addition, if the heat release pipe for preventing dew condensation provided in the insertion part of the outer box and the inner box insertion part are close to each other, the heat from the heat release pipe is transmitted through the inner box and enters the cabinet. There was a case.
Moreover, although the conventional heat insulation box concerning patent document 2 insulates an inner box and an outer box, it does not make an electric heater a structural requirement.

本発明は上記のような課題を解決するためになされたもので、放熱パイプを備えた断熱箱体の前面開口部から庫内に入る熱量を減らすことができる冷凍冷蔵庫を提供することを目的とする。   This invention was made in order to solve the above problems, and it aims at providing the refrigerator-freezer which can reduce the calorie | heat amount which enters into a warehouse from the front opening part of the heat insulation box provided with the heat radiating pipe. To do.

本発明に係る冷凍冷蔵庫は、外箱及び内箱からなり前面が開口した断熱箱体を有する冷蔵庫本体と、該冷蔵庫本体の前面に開閉自在に取り付けられた扉とを備え、前記断熱箱体の外箱はその前側縁部を折り曲げて内側に開口し前面側に開口縁が形成されたほぼコ字状の外箱挿着部が設けられると共に、前記断熱箱体の内箱はその前側縁部を前記外箱挿着部側に折り曲げて該外箱挿着部内に挿入される内箱挿入部が設けられ、前記外箱装着部内に放熱パイプが配設され、前記内箱挿入部の一部は前記放熱パイプに沿ってほぼU字状に折り曲げられ、この曲げ部の高さを前記外箱挿着部の開口より大きくして前記内箱挿入部が前記外箱挿着部を押し広げて嵌入できるようにし、前記内箱挿入部の曲げ部の凹部側と前記外側挿着部の前面開口縁との間に前記放熱パイプが配設されると共に、前記内箱挿入部の表と裏の少なくとも放熱パイプ側の面にシート状の断熱手段が設けられ、手前記断熱手段は前記内箱挿入部に沿ってその曲げ部の両側に延在されて前記外箱挿着部の前面開口縁の裏面と接触し、前記放熱管を前記断熱手段と前記前面開口縁とによって覆い、前記断熱手段により内箱挿入部への放熱を妨げると共に前記前面開口縁に熱を逃がすようにしたものである。 A refrigerator-freezer according to the present invention includes a refrigerator main body having a heat insulating box body including an outer box and an inner box and having a front surface opened, and a door attached to the front surface of the refrigerator main body so as to be openable and closable. The outer box is provided with a substantially U-shaped outer box insertion part that is bent in its front edge and opened to the inside, and an opening edge is formed on the front side, and the inner box of the heat insulation box has its front edge An inner box insertion portion that is bent into the outer box insertion portion side and inserted into the outer box insertion portion, a heat radiating pipe is provided in the outer box attachment portion, and a part of the inner box insertion portion Is bent in a substantially U shape along the heat radiating pipe, the height of the bent portion is made larger than the opening of the outer box insertion portion, and the inner box insertion portion pushes the outer box insertion portion wide. It is possible to insert, the concave side of the bent portion of the inner box insertion portion and the front opening edge of the outer insertion portion The heat radiating pipe is disposed on the front side and the back side of the inner box insertion portion, and at least a surface of the heat radiating pipe side of the inner box insertion portion is provided with a sheet-like heat insulation means. It extends on both sides of the bent portion and contacts the back surface of the front opening edge of the outer box insertion portion, covers the heat radiating pipe with the heat insulating means and the front opening edge, and the heat insulating means inserts the inner box insertion portion. The heat radiation to the front is prevented and heat is released to the front opening edge .

冷凍冷蔵庫の断熱箱体の前面開口部において、外箱の挿着部に挿入される内箱の挿入部にシート状の断熱手段を設けたので、外箱の挿着部から内箱の挿入部を伝わって庫外から庫内に進入する熱ロスを防ぐことができるとともに、放熱パイプから内箱の挿入部を伝わって庫内に進入する熱ロスも防ぐことができる。   In the front opening of the heat insulation box body of the refrigerator / freezer, since the sheet-like heat insulating means is provided in the insertion portion of the inner box inserted into the insertion portion of the outer box, the insertion portion of the inner box from the insertion portion of the outer box It is possible to prevent heat loss from entering the inside of the cabinet from outside the warehouse and to prevent heat loss from entering the inside of the cabinet through the insertion portion of the inner box from the heat radiating pipe.

実施の形態1.
図1は本発明の実施の形態1に係る冷凍冷蔵庫の斜視図、図2は図1のA−A断面図、図3は図1のB−B断面図である。
図において、冷凍冷蔵庫は、冷蔵庫本体1とこの冷蔵庫本体1に開閉自在に取り付けられた扉20及び引出し式の扉20a,20bを備えている。冷蔵庫本体1には断熱箱体2が設けられ、この断熱箱体2は、鋼板よりなる外箱3と、合成樹脂製の内箱4と、これら両者間に充填された断熱材5等によって構成され、断熱箱体2の前面には前面開口部10が設けられている。そして、外箱3の前面開口縁31には、前面開口部10側に向かって狭まり開口した断面ほぼコ字状の挿着部aが形成されており、この挿着部aに内箱4の挿入部(後述する)が嵌め込まれている。
Embodiment 1 FIG.
1 is a perspective view of a refrigerator-freezer according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG.
In the figure, the refrigerator-freezer includes a refrigerator main body 1, a door 20 attached to the refrigerator main body 1 so as to be openable and closable, and drawer-type doors 20a and 20b. The refrigerator main body 1 is provided with a heat insulating box 2, and this heat insulating box 2 is constituted by an outer box 3 made of a steel plate, an inner box 4 made of a synthetic resin, a heat insulating material 5 filled between the two, and the like. A front opening 10 is provided on the front surface of the heat insulation box 2. The front opening edge 31 of the outer box 3 is formed with an insertion portion a having a substantially U-shaped cross-section that narrows and opens toward the front opening 10 side. An insertion part (described later) is fitted.

外箱3の前面開口縁31に設けた挿着部aは、外箱3の端部を複数回折り曲げて形成したものである。すなわち、外箱3の端面を、第1の曲げ部イにおいて前面開口部10側(図3の右側)に向けてほぼ直角に折り曲げて吸着面3aを形成し、ついで第2の曲げ部ロにおいて吸着面3aに沿うようにほぼ180度内側に折り返して第1の挿入面3bを形成し、次に第3の曲げ部ハ(第1の曲げ部イの内側に位置する)において外箱3の側壁30に沿って冷蔵庫の奥行側(図3の上部側)に折り曲げて第2の挿入面3cを形成し、さらに第4の曲げ部ニ(例えば第3の曲げ部ハより約5〜10mmの距離に位置する第4の曲げ部ニ)において、前面開口部10側に鋭角に折り曲げて第3の挿入面3dを形成し、これらの第1、第2、第3の挿入面3b,3c,3dによって囲まれた部分により挿着部aを形成する。   The insertion portion a provided on the front opening edge 31 of the outer box 3 is formed by bending the end of the outer box 3 a plurality of times. That is, the end surface of the outer box 3 is bent at a substantially right angle toward the front opening 10 side (the right side in FIG. 3) at the first bent portion (a) to form the suction surface 3a, and then at the second bent portion (B). The first insertion surface 3b is formed by folding back substantially 180 degrees along the suction surface 3a, and then the third bending portion C (located inside the first bending portion A) of the outer box 3 A second insertion surface 3c is formed by bending along the side wall 30 to the depth side of the refrigerator (upper side in FIG. 3), and a fourth bent portion (for example, about 5 to 10 mm from the third bent portion c). In the fourth bending portion d) located at a distance, the third insertion surface 3d is formed by bending the front opening 10 side at an acute angle, and these first, second, and third insertion surfaces 3b, 3c, The insertion part a is formed by the part surrounded by 3d.

内箱4の前面開口部10側は全周にわたって外箱3の側壁30側(図3の左側)にほぼ直角に折り曲げられ、その折り曲げ部が外箱3の挿着部aによって挟まれて、挿着部aへの挿入部4aを構成している。そして、内箱4の挿入部4aには、断面ほぼ逆U字状に曲げられて冷蔵庫の奥行側に突起したU字状曲げ部4bが形成されており、U字状曲げ部4bの高さを外箱3の挿着部aの開口幅よりも大きくすることで、内箱4の挿入部4aが外箱3の挿着部aを押し広げて嵌入され、固定されるようにしてある。   The front opening 10 side of the inner box 4 is bent substantially at right angles to the side wall 30 side (left side in FIG. 3) of the outer box 3 over the entire circumference, and the bent portion is sandwiched between the insertion portions a of the outer box 3, The insertion part 4a to the insertion part a is comprised. And the insertion part 4a of the inner box 4 is formed with a U-shaped bent part 4b that is bent in a substantially inverted U-shaped cross section and protrudes toward the depth side of the refrigerator. The height of the U-shaped bent part 4b Is made larger than the opening width of the insertion portion a of the outer box 3, so that the insertion portion 4a of the inner box 4 is inserted and fixed by pushing the insertion portion a of the outer box 3 wide.

内箱4の挿入部4aの表裏のほぼ全周は断熱手段である断熱シート11によって覆われている。内箱4の挿入部4aの幅は例えば約2cmなので、幅約2cmの断熱シート11を内箱4の挿入部4aの表と裏に一枚ずつ貼り付けるか、幅約4cmの1枚の断熱シート11を内箱4の挿入部4aの表から裏にかけて張り合わせるようにする。
断熱シート11は、グラス繊維等によって厚さが1.5mm〜3.0mm程度のフェルト状に形成され、熱伝導率約0.03(W/m K)の物性を有する。鋼板の熱伝導率は約20(W/m K)、合成樹脂の熱伝導率は約0.2(W/m K)であるため、断熱シート11は鋼板の外箱3や合成樹脂製の内箱4よりも断熱性に優れており、断熱シート11の片面に粘着加工を施すことで内箱4の挿入部4aに貼り付けられる構造になっている。
Almost the entire circumference of the front and back of the insertion portion 4a of the inner box 4 is covered with a heat insulating sheet 11 which is a heat insulating means. Since the width of the insertion portion 4a of the inner box 4 is, for example, about 2 cm, a heat insulation sheet 11 having a width of about 2 cm is attached to the front and back of the insertion portion 4a of the inner box 4 one by one, or one piece of heat insulation having a width of about 4 cm. The sheet 11 is pasted from the front to the back of the insertion portion 4a of the inner box 4.
The heat insulating sheet 11 is formed of a glass fiber or the like into a felt shape having a thickness of about 1.5 mm to 3.0 mm, and has a physical property of thermal conductivity of about 0.03 (W / m K). Since the thermal conductivity of the steel plate is about 20 (W / m K) and the thermal conductivity of the synthetic resin is about 0.2 (W / m K), the heat insulating sheet 11 is made of the outer casing 3 of the steel plate or made of synthetic resin. It has better heat insulation than the inner box 4, and has a structure that is attached to the insertion portion 4 a of the inner box 4 by applying an adhesive process to one side of the heat insulating sheet 11.

図5は断熱シート11の1m2 あたりの熱抵抗(K/W)と省エネルギー率(%)との関係を示す線図である。省エネルギー率1%を達成するには、熱抵抗0.02(K/W)の断熱シートを用いる必要がある。断熱シートの熱抵抗が、0.00〜0.10(K/W)の間は、熱抵抗が大きいほど省エネルギーを達成することができ、最大約2(%)の効果が出るが、図には熱抵抗が約0.05(K/W)で2(%)に漸近する傾向を示しており、熱抵抗を0.10(K/W)以上大きくしても効果は上がらず、適切な断熱シートの熱抵抗は、0.05〜0.10(K/W)となる。 FIG. 5 is a diagram showing the relationship between the thermal resistance (K / W) per 1 m 2 of the heat insulating sheet 11 and the energy saving rate (%). In order to achieve an energy saving rate of 1%, it is necessary to use a heat insulating sheet having a thermal resistance of 0.02 (K / W). While the thermal resistance of the heat insulating sheet is between 0.00 and 0.10 (K / W), the greater the thermal resistance, the more energy saving can be achieved, and the maximum effect of about 2 (%) is obtained. Shows a tendency that the thermal resistance is approximately 0.05 (K / W) and gradually approaches 2 (%), and even if the thermal resistance is increased to 0.10 (K / W) or more, the effect is not improved. The heat resistance of the heat insulating sheet is 0.05 to 0.10 (K / W).

図6は内箱4の熱ロス分布を示す線図であり、横軸xは扉パッキン21(後述)から内箱4に沿った奥行方向の距離を表しており、内箱4と扉パッキン21の接点100を原点とし、xが大きくなるほど内箱4に沿って庫内の奥へと進むようになっている。図では、外箱3と内箱4の結合部に近いほど熱ロスが大きくなっているが、断熱シート11の熱抵抗を0.05(K/W)、0.10(K/W)と増すことで熱ロスの曲線が下がることがわかる。   FIG. 6 is a diagram showing the heat loss distribution of the inner box 4, and the horizontal axis x represents the distance in the depth direction along the inner box 4 from the door packing 21 (described later), and the inner box 4 and the door packing 21. The point of contact 100 is the origin, and as x increases, the inner box 4 advances toward the back of the interior. In the figure, the heat loss increases as it is closer to the joint between the outer box 3 and the inner box 4, but the thermal resistance of the heat insulating sheet 11 is 0.05 (K / W) and 0.10 (K / W). It can be seen that the heat loss curve decreases as the value increases.

内箱4の挿入部4aに設けたU字状曲げ部4bの凹部側(図3の下部側)と外箱3の第1の挿入面3bとの間には、冷蔵庫の上下方向(図3の前後方向)に露付き防止用の放熱パイプ12が配設され、挿入部4aと放熱パイプ12との間には断熱シート11が介装されている。この放熱パイプ12は、外箱3の前面開口縁31(第1の挿入面3b、吸着面3a)に熱を逃がし温度を上昇させて露付きを防止する。   Between the concave side (the lower side in FIG. 3) of the U-shaped bent portion 4 b provided in the insertion portion 4 a of the inner box 4 and the first insertion surface 3 b of the outer box 3, the vertical direction of the refrigerator (FIG. 3). The heat-dissipating pipe 12 for preventing dew condensation is disposed in the front-rear direction, and a heat insulating sheet 11 is interposed between the insertion portion 4a and the heat-radiating pipe 12. This heat radiating pipe 12 releases heat to the front opening edge 31 (first insertion surface 3b, adsorption surface 3a) of the outer box 3 to increase the temperature and prevent dew condensation.

また、冷凍冷蔵庫の扉20には、外箱3の前面開口縁31の吸着面3aと当接しあう中空の扉パッキン21が設けられており、この扉パッキン21の中空内部には外箱3の吸着面3aと吸着するマグネット22が設けられている。   The door 20 of the refrigerator / freezer is provided with a hollow door packing 21 that comes into contact with the suction surface 3 a of the front opening edge 31 of the outer box 3. A magnet 22 for attracting the attracting surface 3a is provided.

上記のように構成した冷凍冷蔵庫では、図2に示すように、冷媒を圧縮する圧縮機40と、冷媒が凝縮する凝縮器41と、凝縮器41の一部を冷蔵庫本体1の前面開口部10に通した露付き防止用の放熱パイプ12と、冷媒を減圧する絞り装置42と、冷媒が蒸発する冷却器43とを、この順序において直列に接続して、冷凍サイクルを構成している。   In the refrigerator refrigerator configured as described above, as shown in FIG. 2, the compressor 40 that compresses the refrigerant, the condenser 41 that condenses the refrigerant, and a part of the condenser 41 are connected to the front opening 10 of the refrigerator body 1. A refrigeration cycle is configured by connecting in series, in this order, a heat-dissipating pipe 12 for preventing dew that has been passed through, a throttle device 42 for decompressing the refrigerant, and a cooler 43 for evaporating the refrigerant.

上記のように構成した冷凍冷蔵庫は、図4に示すように、背面が閉じられ前面が開口したほぼ直方体形状をなし開口側縁部がほぼ直角に折り曲げられた挿入部4aを有する内箱4を準備し、挿入部4aの両面に断熱シート11を貼り付け、ついで断熱シート11のU字状曲げ部4bの凹部側に放熱パイプ12を埋め込んで、その挿入部4aを、ほぼコ字状をなす外箱3の下方から前面開口縁31に設けた挿着部aに嵌入し、内箱4と外箱3とを結合する。   As shown in FIG. 4, the refrigerator-freezer configured as described above has an inner box 4 having an insertion portion 4a having a substantially rectangular parallelepiped shape whose back is closed and whose front is open and whose opening side edge is bent at a substantially right angle. Prepare the heat insulating sheet 11 on both sides of the insertion portion 4a, and then embed the heat radiating pipe 12 in the concave side of the U-shaped bent portion 4b of the heat insulating sheet 11, so that the insertion portion 4a is substantially U-shaped. The inner box 4 and the outer box 3 are joined by being inserted into the insertion portion a provided on the front opening edge 31 from below the outer box 3.

次に、冷凍冷蔵庫の動作について説明する。外箱3側より内箱4側に、すなわち庫外より庫内に向かう熱は、外箱3の挿着部aと内箱4の挿入部4aの間に介在する断熱シート11によって遮られる。
また、外箱3の挿着部aに設けた放熱パイプ12は、外箱3の前面開口縁31(第1の挿入面3b、吸着面3a)に熱を逃がし温度を上昇させて露付きを防止する。放熱パイプ12から挿入部4aへ向かう熱は、外箱3の挿着部a内に配置された放熱パイプ12と内箱4の挿入部4aとの間に介装された断熱シート11によって遮られて、挿入部4aに伝わらない。
Next, the operation of the refrigerator-freezer will be described. Heat directed from the outer box 3 side to the inner box 4 side, that is, from the outside of the box to the inside of the box, is blocked by the heat insulating sheet 11 interposed between the insertion portion a of the outer box 3 and the insertion portion 4a of the inner box 4.
Moreover, the heat radiating pipe 12 provided in the insertion portion a of the outer box 3 releases heat to the front opening edge 31 (first insertion surface 3b, adsorption surface 3a) of the outer box 3 to increase the temperature and cause dew. To prevent. The heat from the heat radiating pipe 12 toward the insertion portion 4a is blocked by the heat insulating sheet 11 interposed between the heat radiating pipe 12 disposed in the insertion portion a of the outer box 3 and the insertion portion 4a of the inner box 4. Thus, it is not transmitted to the insertion portion 4a.

本実施の形態1によれば、外箱3の挿着部aと内箱4の挿入部4aとの間に断熱シート11が介在するため、外箱3と内箱4の結合部を伝わって庫外から庫内に進入する熱ロスを少なくすることができる。また、放熱パイプ12と挿入部4aの間には断熱シート11が介装されているため、放熱パイプ12から挿入部4aへと伝わる熱ロスも少なくなる。   According to the first embodiment, since the heat insulating sheet 11 is interposed between the insertion portion a of the outer box 3 and the insertion portion 4a of the inner box 4, it is transmitted through the connecting portion of the outer box 3 and the inner box 4. It is possible to reduce the heat loss entering from the outside to the inside. Moreover, since the heat insulation sheet 11 is interposed between the heat radiating pipe 12 and the insertion portion 4a, heat loss transmitted from the heat radiating pipe 12 to the insertion portion 4a is reduced.

実施の形態2.
図7は本発明の実施の形態2に係る冷凍冷蔵庫の断面図である。なお、実施の形態1と同一部分には同じ符号を付し、説明を省略する。
実施の形態1では、内箱4の挿入部4aの表と裏のほぼ全周が断熱シート11によって覆われている場合を示したが、本実施の形態2では、内箱4の挿入部4aの放熱パイプ12が位置する側の面だけを断熱シート11で覆うようにしたものである。すなわち、図7に示すように、内箱4の挿入部4aに設けられたU字状曲げ部4bの凹部側にだけ、例えば厚さ3mmの断熱シート11を貼り付けるようにしたものである。
Embodiment 2. FIG.
FIG. 7 is a cross-sectional view of a refrigerator-freezer according to Embodiment 2 of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
In Embodiment 1, although the case where the front and back of the insertion portion 4a of the inner box 4 were almost entirely covered with the heat insulating sheet 11 was shown, in Embodiment 2, the insertion portion 4a of the inner box 4 is covered. Only the surface on the side where the heat radiating pipe 12 is located is covered with the heat insulating sheet 11. That is, as shown in FIG. 7, for example, a heat insulating sheet 11 having a thickness of 3 mm is attached only to the concave side of the U-shaped bent portion 4 b provided in the insertion portion 4 a of the inner box 4.

外箱3の挿着部aよりも放熱パイプ12の方が温度が高いため、内箱4の挿入部4aに伝わる熱ロスは、外箱3の挿着部a(第3の挿入面3d)からよりも放熱パイプ12からの方が大きい。
本実施の形態2によれば、内箱4の挿入部4aの放熱パイプ12が位置する側の面だけに断熱シート11を貼り付けるようにしたので、断熱シート11の厚みを増すことができ、放熱パイプ12からの熱ロスを効率よく減少させることができる。また、挿入部4aに断熱シート11を貼り付ける作業が、挿入部4aの放熱パイプ12が位置する側の面だけで済むため、作業の効率性が良い。
Since the temperature of the heat radiating pipe 12 is higher than that of the insertion part a of the outer box 3, the heat loss transmitted to the insertion part 4 a of the inner box 4 is reduced by the insertion part a (third insertion surface 3 d) of the outer box 3. The heat radiation pipe 12 is larger than the heat radiation pipe 12.
According to the second embodiment, since the heat insulating sheet 11 is attached only to the surface of the insertion portion 4a of the inner box 4 where the heat radiating pipe 12 is located, the thickness of the heat insulating sheet 11 can be increased. The heat loss from the heat radiating pipe 12 can be reduced efficiently. Moreover, since the operation | work which sticks the heat insulation sheet 11 to the insertion part 4a only needs to be the surface by which the heat radiating pipe 12 of the insertion part 4a is located, work efficiency is good.

以上のように、内箱4の挿入部4aに設けられたU字状曲げ部4bの凹部側を覆っている断熱シート11が、外箱3の挿着部aから内箱4の挿入部4aに伝わる熱や、放熱パイプ12から内箱4の挿入部4aに伝わる熱を妨げるので、庫内に入る熱ロスを減らすことができ、省エネルギーを達成することができる。   As described above, the heat insulating sheet 11 covering the concave side of the U-shaped bent portion 4b provided in the insertion portion 4a of the inner box 4 is inserted from the insertion portion a of the outer box 3 into the insertion portion 4a of the inner box 4. Therefore, the heat loss from the heat radiating pipe 12 to the insertion portion 4a of the inner box 4 can be prevented, so that the heat loss entering the interior can be reduced and energy saving can be achieved.

上記の説明では、図示の冷凍冷蔵庫に本発明を実施した場合を示したが、これに限定するものではなく、他の構造の冷凍冷蔵庫にも本発明を実施することができる。   In the above description, the case where the present invention is implemented in the illustrated refrigerator-freezer is shown. However, the present invention is not limited to this, and the present invention can also be implemented in a refrigerator-freezer having another structure.

本発明の実施の形態1に係る冷凍冷蔵庫の斜視図である。It is a perspective view of the refrigerator-freezer which concerns on Embodiment 1 of this invention. 図1のA−A断面図である。It is AA sectional drawing of FIG. 図1のB−B断面図である。It is BB sectional drawing of FIG. 実施の形態1に係る冷凍冷蔵庫の組立方法を示す説明図である。It is explanatory drawing which shows the assembly method of the refrigerator-freezer which concerns on Embodiment. 実施の形態1に係る断熱シートの熱抵抗と省エネルギー率の関係を示した線図である。It is the diagram which showed the relationship between the thermal resistance of the heat insulation sheet which concerns on Embodiment 1, and an energy saving rate. 実施の形態1に係る熱ロス分布を表す線図である。4 is a diagram showing a heat loss distribution according to Embodiment 1. FIG. 本発明の実施の形態2に係る冷凍冷蔵庫の断面図である。It is sectional drawing of the freezer refrigerator which concerns on Embodiment 2 of this invention.

符号の説明Explanation of symbols

1 冷蔵庫本体、3 外箱、3a 吸着面、3b 第1の挿入面、3c 第2の挿入面、3d 第3の挿入面、4 内箱、4a 挿入部、4b U字状曲げ部、5 断熱材、11 断熱シート(断熱手段)、12 放熱パイプ、a 挿着部。
DESCRIPTION OF SYMBOLS 1 Refrigerator main body, 3 outer box, 3a adsorption surface, 3b 1st insertion surface, 3c 2nd insertion surface, 3d 3rd insertion surface, 4 inner box, 4a insertion part, 4b U-shaped bending part, 5 heat insulation Material, 11 heat insulation sheet (heat insulation means), 12 heat radiation pipe, a insertion part.

Claims (4)

外箱及び内箱からなり前面が開口した断熱箱体を有する冷蔵庫本体と、該冷蔵庫本体の前面に開閉自在に取り付けられた扉とを備え、
前記断熱箱体の外箱はその前側縁部を折り曲げて内側に開口し前面側に開口縁が形成されたほぼコ字状の外箱挿着部が設けられると共に、前記断熱箱体の内箱はその前側縁部を前記外箱挿着部側に折り曲げて該外箱挿着部内に挿入される内箱挿入部が設けられ、前記外箱装着部内に放熱パイプが配設され、
前記内箱挿入部の一部は前記放熱パイプに沿ってほぼU字状に折り曲げられ、この曲げ部の高さを前記外箱挿着部の開口より大きくして前記内箱挿入部が前記外箱挿着部を押し広げて嵌入できるようにし、
前記内箱挿入部の曲げ部の凹部側と前記外側挿着部の前面開口縁との間に前記放熱パイプが配設されると共に、前記内箱挿入部の表と裏の少なくとも放熱パイプ側の面にシート状の断熱手段が設けられ、
前記断熱手段は前記内箱挿入部に沿ってその曲げ部の両側に延在されて前記外箱挿着部の前面開口縁の裏面と接触し、前記放熱管を前記断熱手段と前記前面開口縁とによって覆い、前記断熱手段により内箱挿入部への放熱を妨げると共に前記前面開口縁に熱を逃がすようにした、
ことを特徴とする冷凍冷蔵庫。
A refrigerator main body having a heat insulating box made of an outer box and an inner box and having a front surface opened, and a door attached to the front surface of the refrigerator main body so as to be opened and closed.
The outer box of the heat insulation box is provided with a substantially U-shaped outer box insertion part that is bent in front and is opened inward and an opening edge is formed on the front side. Is provided with an inner box insertion portion which is inserted into the outer box insertion portion by bending the front side edge portion to the outer box insertion portion side, and a heat radiating pipe is disposed in the outer box mounting portion,
A part of the inner box insertion portion is bent in a substantially U shape along the heat radiating pipe, and the height of the bent portion is larger than the opening of the outer box insertion portion so that the inner box insertion portion is So that the box insertion part can be expanded and inserted,
The heat radiating pipe is disposed between the concave side of the bent portion of the inner box insertion portion and the front opening edge of the outer insertion portion, and at least on the heat radiating pipe side of the front and back of the inner box insertion portion. Sheet-like heat insulation means is provided on the surface,
The heat insulating means extends along both sides of the bent portion along the inner box insertion portion and contacts the back surface of the front opening edge of the outer box insertion portion, and the heat radiating pipe is connected to the heat insulating means and the front opening edge. And the heat insulation means to prevent heat dissipation to the inner box insertion portion and to release heat to the front opening edge,
A refrigerator-freezer characterized by that.
前記外箱挿着部は、前記外箱の前側縁部が前記断熱箱体の開口部側に折り曲げられ、さらにその奥側で1往復折り曲げられて、側面内側方向に開くほぼコ字状に形成されたことを特徴とする請求項1記載の冷凍冷蔵庫。 The outer box insertion portion is formed in a substantially U-shape in which the front edge of the outer box is bent toward the opening side of the heat insulating box body, and further bent back and forth one time, and is opened inward in the side surface. The refrigerator-freezer according to claim 1, wherein the refrigerator is a refrigerator. 前記断熱手段はフェルト状の断熱シートによって形成されたことを特徴とする請求項1または2記載の冷凍冷蔵庫。   3. The refrigerator-freezer according to claim 1, wherein the heat insulating means is formed of a felt-like heat insulating sheet. 前記フェルト状の断熱シートはグラス繊維によって形成されたことを特徴とする請求項3記載の冷凍冷蔵庫。   The refrigerator-freezer according to claim 3, wherein the felt-like heat insulating sheet is formed of glass fiber.
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