JP2008107045A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator having high heat insulating property at an outer edge portion of an opening for taking in and out an object to be cooled, thereby capable of reducing power consumption. <P>SOLUTION: This refrigerator comprises an inner housing 10 provided with the opening for taking in and out the object to be cooled at a front face side and defining the object storing compartment 1 at its inside, an outer housing 20 disposed outside of the inner housing and forming an exterior package, a front flange portion 21 formed on a part of the outer housing 20 in a state that a packing member 2a disposed on an opening and closing door 2 is closely kept into contact with a face at its front face side at an outer edge of the opening for taking in and out, a grooved portion 22 formed on a part of the outer housing 20 for fitting an end portion 11 of the inner housing 10 at a back side of the front flange portion 21, and a cover member 50 composed of a material having sufficiently low heat conductivity such as a resin, covering at least a part of the front flange portion 21 and the grooved portion 22, and partitioning the front flange portion 21 and the grooved portion 22 in the closing state of the opening and closing door 2, from a space communicating with the storing compartment 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は，冷蔵庫に関し，特に，被冷却物の出し入れ口の外縁部における断熱性が高められた冷蔵庫に関するものである。   The present invention relates to a refrigerator, and more particularly, to a refrigerator with improved heat insulation at the outer edge of an inlet / outlet for an object to be cooled.

昨今，冷蔵庫は，省エネルギー化の要求が益々厳しくなっている。冷蔵庫の省エネルギー化において，被冷却物（食品等）の収容室と冷蔵庫の外部との断熱性を高めることが非常に重要である。
図１は，前面の開閉扉が開かれた状態の従来の冷蔵庫Ａの正面図を表す。
一般に，冷蔵庫は，図１に示すように，前面側に被冷却物（食品等）の出し入れ口が形成され，その内側が被冷却物の収容室１である樹脂製の内側筐体１０と，その内側筐体１０の外側に配置されて前記出し入れ口の前面側を除く部分においてその冷蔵庫Ａの外装を形成する金属製の外側筐体２０と，前記出し入れ口を開閉可能な開閉扉２とを備えている。また，前記内側筐体１０と前記外側筐体２０とは，前記出し入れ口の外縁部において連結されている。 In recent years, refrigerators have become more demanding for energy saving. In order to save energy in the refrigerator, it is very important to enhance the heat insulation between the storage room for the object to be cooled (food, etc.) and the outside of the refrigerator.
FIG. 1 shows a front view of a conventional refrigerator A in a state where a front opening / closing door is opened.
In general, as shown in FIG. 1, a refrigerator has a resin inner case 10 in which an inlet / outlet for an object to be cooled (food, etc.) is formed on the front side, and the inside of the refrigerator is a storage chamber 1 for the object to be cooled; A metal outer casing 20 which is disposed outside the inner casing 10 and forms the exterior of the refrigerator A in a portion excluding the front side of the inlet / outlet, and an opening / closing door 2 capable of opening and closing the inlet / outlet. I have. The inner casing 10 and the outer casing 20 are connected to each other at the outer edge of the entrance / exit.

図４は，従来の冷蔵庫Ａにおける前記内側筐体１０と前記外側筐体２０との連結構造を表す平断面図（図１におけるＢ−Ｂ断面の図）である。
図４に示すように，外側筐体２０の前面側の端部付近には，前記出し入れ口の外縁において開閉扉２に設けられたパッキン部材２ａがその前面側の面に密着する部分である前面フランジ部２１と，その前面フランジ部２１の背面側において内側筐体１０の端部１１が嵌入される断面略コの字状の溝状部２２とが設けられている。このように，内側筐体１０の端部１１が外側筐体２０の溝状部２２に嵌入される（嵌合する）ことにより，内側筐体１０と外側筐体２０とは，前記出し入れ口の外縁部において連結されている。また，内側筐体１０と外側筐体２０との間には，発泡断熱材３０が充填されている。また，パッキン部材２ａには，磁石２ｂが内包されており，開閉扉２が閉じられた状態において，前記磁石２ｂが金属製の外側筐体２０における前面フランジ部２１を引き寄せる磁力により，パッキン部材２ａが前面フランジ部２１に密着する。
このように，冷蔵庫は，開閉扉２が閉じられた状態において，収容室１が冷蔵庫の外部空間から遮蔽された状態となり，収容室１内への外気の流入や，収容室１から外部への冷気の流出がないよう構成されている。また，発泡断熱材３０により，収容室１と冷蔵庫外部との間の熱移動が抑えられている。
特開平８−１３６１１０号公報 FIG. 4 is a cross-sectional plan view (cross-sectional view taken along the line BB in FIG. 1) showing a connection structure between the inner housing 10 and the outer housing 20 in the conventional refrigerator A.
As shown in FIG. 4, near the front side end of the outer casing 20, the front surface is a portion where the packing member 2a provided on the open / close door 2 is in close contact with the front side surface at the outer edge of the loading / unloading port. A flange portion 21 and a groove-shaped portion 22 having a substantially U-shaped cross section into which the end portion 11 of the inner housing 10 is fitted are provided on the back side of the front flange portion 21. As described above, when the end portion 11 of the inner housing 10 is fitted (fitted) into the groove-like portion 22 of the outer housing 20, the inner housing 10 and the outer housing 20 are connected to each other at the entrance / exit. It is connected at the outer edge. Further, a foam heat insulating material 30 is filled between the inner housing 10 and the outer housing 20. The packing member 2a contains a magnet 2b, and when the door 2 is closed, the magnet 2b attracts the front flange portion 21 of the metal outer casing 20, and thereby the packing member 2a. Closely contacts the front flange portion 21.
Thus, the refrigerator is in a state in which the storage chamber 1 is shielded from the external space of the refrigerator when the open / close door 2 is closed, and the inflow of outside air into the storage chamber 1 or from the storage chamber 1 to the outside. It is configured so that there is no outflow of cold air. Moreover, the heat transfer between the storage chamber 1 and the outside of the refrigerator is suppressed by the foam heat insulating material 30.
JP-A-8-136110

ところで，冷蔵庫が備える金属製（通常は鋼材製）の外側筐体２０は，熱伝導率が高い（約８０Ｗ／ｍ・Ｋ）。また，図４に示すように，従来の冷蔵庫Ａは，外側筐体２０の一部である前面フランジ部２１及び溝状部２２における一部２４は，開閉扉２が閉じられた状態においても，収容室１に連通する空間に曝されている。
このため，従来の冷蔵庫Ａは，開閉扉２が閉じられた状態においても，収容室１内と冷蔵庫Ａ外部との間で，外側筐体２０を通じて比較的大きな熱移動が生じてしまうという問題点があった。通常，冷蔵庫外部の方が収容室１内の温度よりも高いため，外側筐体２０を通じた熱移動（収容室１内への熱流入）は，冷蔵庫Ａの電力消費増大につながる。
また，外側筐体２０は，前面フランジ部２１及び溝状部２２における収容室１の空気に曝される部分２４とその近傍部分において低温となるため，その部分において，冷蔵庫Ａの設置環境の湿度が高い場合に結露が生じる。この結露を防止するため，従来の冷蔵庫Ａは，前面フランジ部２１の近傍の背面側に，収容室１内を冷凍サイクルにより冷却する冷却装置における放熱パイプ４０（高温高圧側の冷媒が流れるパイプ）が配設され，この放熱パイプ４０の放射熱によって前面フランジ部２１及び溝状部２２を加熱している。
また，特許文献１には，前記放熱パイプ４０の代わりに配設された電気ヒータと，温度センサの検知温度等に基づく結露条件の判別結果に応じて前記電気ヒータの通電制御を行う制御部とを備えた冷蔵庫が示されている。
しかしながら，放熱パイプ４０や前記電気ヒータによって前面フランジ部２１及び溝状部２２を加熱すると，結露は防止できるものの，外側筐体２０を通じた収容室１内への流入熱量が益々増大し，冷蔵庫Ａの電力消費の更なる増大につながるという問題点があった。
従って，本発明は上記事情に鑑みてなされたものであり，その目的とするところは，被冷却物の出し入れ口の外縁部における断熱性が高く，これによって消費電力を低減できる冷蔵庫を提供することにある。 By the way, the outer casing 20 made of metal (usually made of steel) provided in the refrigerator has high thermal conductivity (about 80 W / m · K). In addition, as shown in FIG. 4, in the conventional refrigerator A, the front flange portion 21 which is a part of the outer casing 20 and the part 24 in the groove-like portion 22 are also in a state where the open / close door 2 is closed. It is exposed to a space communicating with the storage chamber 1.
For this reason, the conventional refrigerator A has a problem that a relatively large heat transfer occurs between the inside of the storage chamber 1 and the outside of the refrigerator A through the outer casing 20 even when the open / close door 2 is closed. was there. Usually, since the temperature outside the refrigerator is higher than the temperature inside the storage chamber 1, heat transfer through the outer housing 20 (heat inflow into the storage chamber 1) leads to an increase in power consumption of the refrigerator A.
Further, since the outer casing 20 has a low temperature in the portion 24 exposed to the air in the housing chamber 1 in the front flange portion 21 and the groove-like portion 22 and in the vicinity thereof, the humidity of the installation environment of the refrigerator A in that portion. Condensation occurs when is high. In order to prevent this dew condensation, the conventional refrigerator A has a heat radiating pipe 40 (a pipe through which a high-temperature and high-pressure side refrigerant flows) in a cooling device that cools the inside of the storage chamber 1 by a refrigeration cycle on the back side near the front flange portion 21. The front flange portion 21 and the groove-shaped portion 22 are heated by the radiant heat of the heat radiating pipe 40.
Patent Document 1 discloses an electric heater disposed in place of the heat radiating pipe 40, a control unit that performs energization control of the electric heater according to a determination result of a dew condensation condition based on a temperature detected by a temperature sensor, and the like. A refrigerator with is shown.
However, if the front flange portion 21 and the groove-like portion 22 are heated by the heat radiating pipe 40 or the electric heater, although condensation can be prevented, the amount of heat flowing into the storage chamber 1 through the outer casing 20 increases more and more. There is a problem that it leads to further increase in power consumption.
Accordingly, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a refrigerator that has high heat insulation at the outer edge portion of the entrance and exit of the object to be cooled, thereby reducing power consumption. It is in.

上記目的を達成するために本発明は，前面側（正面側といってもよい）に被冷却物の出し入れ口が形成されその内側が前記被冷却物の収容室である内側筐体と，その内側筐体の外側に配置されて前記出し入れ口の前面側を除く部分において当該冷蔵庫の外装を形成する外側筐体と，前記出し入れ口を開閉可能な開閉扉とを備え，さらに以下の（１）〜（３）に示す構成要素を備えた冷蔵庫である。
（１）前記外側筐体の一部に形成され，前記出し入れ口の外縁において前記開閉扉に設けられたパッキン部材がその前面側の面に密着するパッキン密着部。
（２）前記外側筐体の一部に形成され，前記パッキン密着部の背面側において前記内側筐体の端部が嵌入される溝状部。
（３）前記外側筐体よりも熱伝導率が小さい材料からなり，前記パッキン密着部及び前記溝状部のうちの少なくとも一部を覆うことにより前記開閉扉が閉じられた状態における前記パッキン密着部及び前記溝状部を前記収容室に連通する空間から仕切るカバー部材。
例えば，前記外側筐体が金属製の部材であり，前記内側筐体及び前記カバー部材が樹脂製の部材であることが考えられる。
以上の構成を備えた冷蔵庫においては，前記外側筐体が，熱伝導率の小さい（即ち，断熱性が高い）前記カバー部材によって前記収容室に連通する空間から仕切られている。このため，前記開閉扉が閉じられた状態において，前記収容室内と当該冷蔵庫の外部との間で，前記外側筐体を通じた熱移動が生じにくい。
特に，前記カバー部材が，空間を介して前記パッキン密着部及び前記溝状部のうちの少なくとも一部を覆うものであれば，前記外側筐体と前記収容室に連通する空間との間の断熱性がより高まり，前記収容室内と当該冷蔵庫の外部との間の熱移動がさらに生じにくくなり好適である。
さらに，前記冷蔵庫において，前記パッキン密着部及び前記溝状部の近傍に，前記収容室内を冷凍サイクルにより冷却する冷却手段における放熱パイプが配設されることが考えられる。
これにより，当該冷蔵庫の設置環境の湿度が高い場合であっても，前記パッキン密着部や前記溝状部に結露が生じることを防止できる。また，前記カバー部材が，前記放熱パイプにより加熱された前記外側筐体から前記収容室内への熱移動を遮断するため，前記放熱パイプの熱によって前記収容室内の温度が上昇することを防止できる。 In order to achieve the above object, the present invention comprises an inner housing in which an inlet / outlet for an object to be cooled is formed on the front side (which may be referred to as the front side), and an inner side of the inner casing is a storage chamber for the object to be cooled. An outer casing that is disposed outside the inner casing and forms the exterior of the refrigerator in a portion excluding the front side of the outlet / inlet, and an open / close door that can open and close the inlet / outlet, and further includes the following (1) It is a refrigerator provided with the component shown in (3).
(1) A packing contact portion that is formed on a part of the outer casing and a packing member provided on the opening / closing door at the outer edge of the loading / unloading port is in close contact with the front surface.
(2) A groove-shaped portion formed in a part of the outer casing and into which the end of the inner casing is fitted on the back side of the packing contact portion.
(3) The packing contact portion in a state in which the door is closed by covering at least part of the packing contact portion and the groove-shaped portion, which is made of a material having a lower thermal conductivity than the outer casing. And a cover member for partitioning the groove-like portion from a space communicating with the storage chamber.
For example, it is conceivable that the outer casing is a metal member, and the inner casing and the cover member are resin members.
In the refrigerator having the above-described configuration, the outer casing is partitioned from the space communicating with the storage chamber by the cover member having low thermal conductivity (that is, high heat insulation). For this reason, when the door is closed, heat transfer through the outer casing is unlikely to occur between the storage chamber and the outside of the refrigerator.
In particular, if the cover member covers at least a part of the packing contact portion and the groove-like portion through a space, heat insulation between the outer casing and the space communicating with the storage chamber. Therefore, the heat transfer between the storage chamber and the outside of the refrigerator is less likely to occur, which is preferable.
Furthermore, in the refrigerator, it is conceivable that a heat radiating pipe in a cooling means for cooling the storage chamber by a refrigeration cycle is disposed in the vicinity of the packing contact portion and the groove-like portion.
Thereby, even if it is a case where the humidity of the installation environment of the said refrigerator is high, it can prevent that dew condensation arises in the said packing adhesion part and the said groove-shaped part. Further, since the cover member blocks heat transfer from the outer casing heated by the heat radiating pipe to the housing chamber, it is possible to prevent the temperature in the housing chamber from rising due to heat of the heat radiating pipe.

本発明に係る冷蔵庫は，熱伝導率の小さい前記カバー部材が，前記収容室内と冷蔵庫の外部との間での前記外側筐体を通じた熱移動を遮断するため，前記開閉扉が閉じられた状態において，被冷却物の出し入れ口の外縁部における断熱性が高い。その結果，本発明に係る冷蔵庫は，外気や前記放熱パイプからの熱によって前記収容室内の温度が上昇することが極力抑えられ，前記収容室内を一定温度に維持するために要する消費電力を低減することができる。   In the refrigerator according to the present invention, the cover member having a low thermal conductivity blocks the heat transfer through the outer casing between the storage chamber and the outside of the refrigerator, so that the open / close door is closed. However, the heat insulation at the outer edge of the inlet / outlet of the object to be cooled is high. As a result, the refrigerator according to the present invention suppresses as much as possible the temperature in the accommodation chamber from rising due to the outside air or heat from the heat radiating pipe, and reduces power consumption required to maintain the accommodation chamber at a constant temperature. be able to.

以下添付図面を参照しながら，本発明の実施の形態について説明し，本発明の理解に供する。なお，以下の実施の形態は，本発明を具体化した一例であって，本発明の技術的範囲を限定する性格のものではない。
ここに，図１は本発明の実施形態に係る冷蔵庫Ｘにおける前面の開閉扉が開かれた状態を表す正面図，図２は冷蔵庫Ｘにおける内側筐体と外側筐体との連結構造を表す平断面図，図３は冷蔵庫Ｘにおける内側筐体と外側筐体との連結構造を表す拡大平断面図，図４は従来の冷蔵庫Ａにおける内側筐体と外側筐体との連結構造を表す平断面図である。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that the present invention can be understood. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.
FIG. 1 is a front view showing a state in which the front door is opened in the refrigerator X according to the embodiment of the present invention. FIG. 2 is a plan view showing a connection structure between the inner housing and the outer housing in the refrigerator X. FIG. 3 is an enlarged plan sectional view showing a connection structure between the inner housing and the outer housing in the refrigerator X, and FIG. 4 is a plane section showing a connection structure between the inner housing and the outer housing in the conventional refrigerator A. FIG.

まず，図１に示す正面図を参照しつつ，本発明の実施形態に係る冷蔵庫Ｘの全体構成の概略について説明する。なお，冷蔵庫Ｘの外観は，前述した従来の冷蔵庫Ａと概ね同じであるため，前記冷蔵庫Ａの場合と同じ図１を用いて冷蔵庫Ｘの全体構成の概略について説明する。また，冷蔵庫Ｘと冷蔵庫Ａとにおいて共通する構成要素には同じ符号を付している。
図１に示すように，冷蔵庫Ｘは，その内部に前面が被冷却物の出し入れ口となっている４つの収容室１，３，５，７が形成されている。即ち，冷蔵庫Ｘ全体を上下に分割した上側の領域に形成された冷蔵室１と，その下側の領域をさらに左右に分割した領域の一方（左側）に形成された野菜室３と，その他方（右側）に形成された製氷室５及び冷凍室７とが形成されており，それら収容室１，３，５，７各々の前面の出し入れ口を個別に開閉可能な開閉扉２，４，６，８が，不図示のヒンジによって略水平方向に回動自在に設けられている。
また，前記冷蔵庫Ｘは，前面側に被冷却物の出し入れ口が形成され，その内側が前記収容室１，３，５，７である内側筐体１０と，その内側筐体１０の外側に配置され，前記出し入れ口の前面側を除く部分において冷蔵庫Ｘの外装を形成する外側筐体２０とを備えている。
前記外側筐体２０は，冷蔵庫Ｘに必要な剛性（強度）を確保するため，例えば鋼材等の金属製の部材が採用されている。また，前記内側筐体１０は，軽量性，断熱性及び様々な形状への加工性が高い部材であることが望ましいため，例えばＡＢＳ樹脂等の部材が採用されている。 First, the outline of the whole structure of the refrigerator X which concerns on embodiment of this invention is demonstrated, referring the front view shown in FIG. The external appearance of the refrigerator X is substantially the same as that of the conventional refrigerator A described above, and therefore the overall configuration of the refrigerator X will be described with reference to FIG. Moreover, the same code | symbol is attached | subjected to the component which is common in the refrigerator X and the refrigerator A. FIG.
As shown in FIG. 1, the refrigerator X has four storage chambers 1, 3, 5, and 7 having a front surface serving as an inlet / outlet for an object to be cooled. That is, the refrigerator compartment 1 formed in the upper region divided into the entire upper part of the refrigerator X, the vegetable compartment 3 formed in one (left side) of the region further divided into the left and right sides, and the other The ice making chamber 5 and the freezing chamber 7 formed on the right side are formed, and the open / close doors 2, 4, 6 that can individually open and close the front and rear entrances of the storage chambers 1, 3, 5, 7 respectively. , 8 are rotatably provided in a substantially horizontal direction by a hinge (not shown).
In addition, the refrigerator X has an inlet / outlet port for an object to be cooled on the front side, and an inner case 10 inside the storage chambers 1, 3, 5, and 7 and an outer side of the inner case 10. And an outer casing 20 that forms an exterior of the refrigerator X in a portion excluding the front side of the entrance / exit.
In order to ensure the rigidity (strength) required for the refrigerator X, the outer casing 20 is made of a metal member such as steel. Further, since the inner casing 10 is desirably a member that is lightweight, heat-insulating, and highly workable into various shapes, for example, a member such as ABS resin is employed.

次に，図２及び図３に示す平断面図を参照しつつ，前記冷蔵庫Ｘにおける前記内側筐体１０と前記外側筐体２０との連結構造について説明する。なお，図２は，図１におけるＢ−Ｂ断面を表し，図３は図２に示すＢ−Ｂ断面図の一部の拡大図である。また，冷蔵庫Ｘは，その左右における側面から前面に渡るコーナー部の上下方向ほぼ全体に渡って，図２及び図３に示される断面と同様の断面構造を有している。また，以下の説明では冷蔵室１のことを収容室１として記載する。
図２及び図３に示すように，前記外側筐体２０は，前面側の部分（前記出し入れ口の外縁の部分）に，前面フランジ部２１（パッキン密着部の一例）及び溝状部２２が形成されている。
前記前面フランジ部２１は，前記出し入れ口の外縁において前記開閉扉２に設けられたパッキン部材２ａがその前面側の面に密着する部分である。
また，前記溝状部２２は，前記前面フランジ部２１の背面側において，前記内側筐体１０の端部１１が嵌入される断面略コの字状（断面略Ｕ字状といってもよい）の部分である。
このように，前記外側筐体２０における前記溝状部２２に前記内側筐体１０の端部１１が嵌入される（嵌合する）ことにより，前記外側筐体２０と前記内側筐体１０とが，それらの間に空間が形成された状態で前記出し入れ口の外縁部において連結されている。
また，前記内側筐体１０と前記外側筐体２０との間には，発泡断熱材３０が充填されている。また，前記パッキン部材２ａには，磁石２ｂが内包されており，前記開閉扉２が閉じられた状態において，前記磁石２ｂが金属製の前記前面フランジ部２１を引き寄せる磁力により，パッキン部材２ａが前面フランジ部２１に密着する。
前記パッキン部材２ａは，例えば，熱伝導率が小さい軟性部材からなり，例えば，ＰＶＣ樹脂製の部材である。なお，図３において，前記パッキン部材２ａは破線で示されている。 Next, a connection structure between the inner housing 10 and the outer housing 20 in the refrigerator X will be described with reference to the cross-sectional views shown in FIGS. 2 represents a BB cross section in FIG. 1, and FIG. 3 is an enlarged view of a part of the BB cross section shown in FIG. Moreover, the refrigerator X has the same cross-sectional structure as the cross section shown by FIG.2 and FIG.3 over the whole up-down direction of the corner part over the front surface from the side surface in the right and left. Moreover, in the following description, the refrigerator compartment 1 is described as the storage compartment 1.
As shown in FIGS. 2 and 3, the outer casing 20 has a front flange portion 21 (an example of a packing contact portion) and a groove-like portion 22 formed on the front side portion (the outer edge portion of the inlet / outlet). Has been.
The front flange portion 21 is a portion where the packing member 2a provided on the open / close door 2 is in close contact with the front side surface at the outer edge of the entrance / exit.
Further, the groove-like portion 22 has a substantially U-shaped cross section (may be called a substantially U-shaped cross section) in which the end portion 11 of the inner housing 10 is fitted on the back side of the front flange portion 21. It is a part of.
As described above, when the end portion 11 of the inner casing 10 is fitted (fitted) into the groove-shaped portion 22 in the outer casing 20, the outer casing 20 and the inner casing 10 are connected to each other. , They are connected at the outer edge of the inlet / outlet with a space formed between them.
Further, a foam heat insulating material 30 is filled between the inner housing 10 and the outer housing 20. The packing member 2a includes a magnet 2b. When the door 2 is closed, the magnet 2b attracts the metal front flange portion 21 to bring the packing member 2a to the front surface. The flange portion 21 is in close contact.
The packing member 2a is made of, for example, a soft member having a low thermal conductivity, and is, for example, a member made of PVC resin. In FIG. 3, the packing member 2a is indicated by a broken line.

図３に示すように，前記外側筐体２０は，冷蔵庫Ｘの側面から前面にかけて概ね９０度折れ曲がる第１の曲げ部２３と，その第１の曲げ部２３の延長部分（冷蔵庫Ｘの前面）から背面側へ概ね１８０度折り返された折り返し部２４と，その折り返し部２４の延長部分から背面側へ概ね９０度折れ曲がる第２の曲げ部２５と，その第２の曲げ部２５の延長部分から冷蔵庫Ｘの内側の方向へ概ね９０度折れ曲がる第３の曲げ部２６とが形成されている。
そして，前記第１の曲げ部２３から前記折り返し部２４に渡る部分が，前記前面フランジ部２１となっている。また，前記折り返し部２４から前記第２の曲げ部２５に渡る部分２２ａ，前記第２の曲げ部２５から前記第３の曲げ部２６に渡る部分２２ｂ，及び前記第３の曲げ部２６から前記外側筐体２０の端部に渡る部分２２ｃが，断面略コの字状（或いはＵ字状）の前記溝状部２２となっている。
また，前記内側筐体１０の端部も，断面略Ｕ字状の湾曲部１１ａが形成されており，その湾曲部１１ａが前記溝状部２２に嵌入されている。 As shown in FIG. 3, the outer casing 20 includes a first bent portion 23 that bends approximately 90 degrees from the side surface to the front surface of the refrigerator X, and an extended portion of the first bent portion 23 (the front surface of the refrigerator X). The folded portion 24 folded back approximately 180 degrees to the back side, the second bent portion 25 bent approximately 90 degrees from the extended portion of the folded portion 24 to the back side, and the extended portion of the second bent portion 25 to the refrigerator X And a third bent portion 26 that is bent approximately 90 degrees in the inner direction.
A portion extending from the first bent portion 23 to the folded portion 24 is the front flange portion 21. Further, a portion 22 a extending from the folded portion 24 to the second bent portion 25, a portion 22 b extending from the second bent portion 25 to the third bent portion 26, and the outer side from the third bent portion 26. A portion 22c extending over the end of the housing 20 is the groove-shaped portion 22 having a substantially U-shaped cross section (or U-shape).
Further, an end portion of the inner housing 10 is also formed with a curved portion 11 a having a substantially U-shaped cross section, and the curved portion 11 a is fitted into the groove-shaped portion 22.

また，冷蔵庫Ｘの設置環境の湿度が高い場合に，前記前面フランジ部２１及び前記溝状部２２に結露が生じることを防止するため，前記前面フランジ部２１の近傍に，前記収容室１内を冷凍サイクルにより冷却する冷却装置（不図示）における放熱パイプ４０（高温高圧側の冷媒が流れるパイプ）が配設され，この放熱パイプ４０の放射熱によって前記前面フランジ部２１及び前記溝状部２２が加熱される。なお，図２及び図３に示す例では，前記放熱パイプ４０が，前記前面フランジ部２１の背面側における前記溝状部２２の内側に配設されているが，前記放熱パイプ４０は，前記前面フランジ部２１及び前記溝状部２２を加熱できる近傍位置であれば他の位置に配設されてもかまわない。   In addition, when the humidity of the installation environment of the refrigerator X is high, the inside of the storage chamber 1 is placed in the vicinity of the front flange portion 21 in order to prevent condensation on the front flange portion 21 and the groove-like portion 22. A heat radiating pipe 40 (a pipe through which a refrigerant on a high temperature and high pressure side flows) is disposed in a cooling device (not shown) that is cooled by a refrigeration cycle. Heated. In the example shown in FIGS. 2 and 3, the heat radiating pipe 40 is disposed on the inner side of the groove-like portion 22 on the back side of the front flange portion 21. As long as the flange portion 21 and the groove-like portion 22 can be heated in the vicinity, they may be disposed at other positions.

また，冷蔵庫Ｘは，前記前面フランジ部２１及び前記溝状部２２のうちの一部を覆うカバー部材５０を備えている。このカバー部材５０は，前記開閉扉２が閉じられた状態における前記前面フランジ部２１及び前記溝状部２２を，前記収容室１に連通する空間から仕切るものである。また，前記カバー部材５０は，前記外側筐体２０よりも熱伝導率が十分に小さい材料からなり，例えば，ＡＢＳ樹脂製の部材である。鋼材である前記外側筐体２０の熱伝導率は約８０Ｗ／ｍ・Ｋであるのに対し，ＡＢＳ樹脂製の部材である前記カバー部材５０や，ＰＶＣ樹脂製の部材である前記パッキン部材２ａの熱伝導率は約０．２Ｗ／ｍ・Ｋと十分に小さい。
また，前記カバー部材５０は，前記溝状部２２の表面に当接する第１突起部５１，及び前記前面フランジ部２１の表面に当接する第２突起部５２が形成されている。前記カバー部材５０は，これら両突起部５１，５２がスペーサとして機能することにより，空間を介して前記前面フランジ部２１及び前記溝状部２２の一部を覆うよう設けられている。前記カバー部材５０の厚みは，例えば１ｍｍ程度である。 The refrigerator X includes a cover member 50 that covers a part of the front flange portion 21 and the groove-like portion 22. The cover member 50 divides the front flange portion 21 and the groove-like portion 22 in a state where the open / close door 2 is closed from a space communicating with the storage chamber 1. The cover member 50 is made of a material having a sufficiently lower thermal conductivity than the outer casing 20, and is a member made of ABS resin, for example. The thermal conductivity of the outer casing 20 made of steel is about 80 W / m · K, whereas the cover member 50 made of ABS resin or the packing member 2a made of PVC resin is used. The thermal conductivity is sufficiently small at about 0.2 W / m · K.
The cover member 50 is formed with a first protrusion 51 that contacts the surface of the groove-shaped part 22 and a second protrusion 52 that contacts the surface of the front flange part 21. The cover member 50 is provided so as to cover a part of the front flange portion 21 and the groove-like portion 22 through a space when both the protruding portions 51 and 52 function as spacers. The cover member 50 has a thickness of about 1 mm, for example.

また，図３に示すように，前記カバー部材５０は，前記開閉扉２が閉じられた状態において，軟性部材である前記パッキン部材２ａの一部と干渉する（前記パッキン部材２ａの一部が覆いかぶさる）が，前記磁石２ｂとは干渉しない範囲において前面フランジ部２１の一部を覆っている。
これにより，前記磁石２ｂの磁力によって前記パッキン部材２ａが前記前面フランジ部２１に密着する力が阻害されず，また，前記前面フランジ部２１が，前記カバー部材５０によって前記収容室１に連通する空間から確実に仕切られる。
さらに，前記カバー部材５０の背面側には，前記内側筐体１０の湾曲部１１ａの内側により係止される第１被係止部５３及び第２被係止部５４が突設されている。これら第１被係止部５３及び第２被係止部５４が前記内側筐体１０の一部に係止されることにより，前記カバー部材５０の位置が固定されている。即ち，前記第１被係止部５３は，前記カバー部材５０の側面方向への移動を規制するものであり，前記第２被係止部５４は，前記カバー部材５０の前記出し入れ口側方向への移動を規制するものである。 As shown in FIG. 3, the cover member 50 interferes with a part of the packing member 2a, which is a soft member, in a state where the door 2 is closed (a part of the packing member 2a covers the cover member 50). Covers a part of the front flange portion 21 in a range where it does not interfere with the magnet 2b.
Thereby, the force by which the packing member 2a is in close contact with the front flange portion 21 is not hindered by the magnetic force of the magnet 2b, and the front flange portion 21 communicates with the storage chamber 1 by the cover member 50. It is surely partitioned from.
Further, a first locked portion 53 and a second locked portion 54 that are locked by the inner side of the curved portion 11 a of the inner housing 10 protrude from the back side of the cover member 50. The position of the cover member 50 is fixed by the first locked portion 53 and the second locked portion 54 being locked to a part of the inner housing 10. That is, the first locked portion 53 restricts the movement of the cover member 50 in the side surface direction, and the second locked portion 54 moves in the direction of the access port side of the cover member 50. Is restricted.

前記冷蔵庫Ｘにおいては，前記外側筐体２０が，熱伝導率の小さい（即ち，断熱性が高い）前記カバー部材５０によって前記収容室１に連通する空間から仕切られている。このため，前記開閉扉２が閉じられた状態において，前記収容室１内と当該冷蔵庫Ｘの外部との間で，前記外側筐体２０の前記前面フランジ部２１及び溝状部２２を通じた熱移動が生じにくい。
特に，前記カバー部材５０が，空間を介して前記前面フランジ部２１及び前記溝状部２２を覆っているので，前記外側筐体２０と前記収容室１に連通する空間との間の断熱性がより高められている。従って，冷蔵庫Ｘは，前記開閉扉２が閉じられた状態において，被冷却物の出し入れ口の外縁部における断熱性が高い。
例えば，前記外側筐体２０が鋼材，前記内側筐体１０及び前記カバー部材５０がＡＢＳ樹脂製の部材，前記パッキン部材２ａがＰＶＣ樹脂製の部材，前記カバー部材５０の厚みが１ｍｍである場合を考える。
この場合，図２及び図３に示す構造と図４に示す構造とについて，二次元モデルの有限要素法により，外側筐体２０から収容室１へ漏れる熱量（放熱量）のシミュレーション計算を行った結果，収容室１へ漏れる熱量が，図２及び図３に示す構造の方が，図４に示す構造に比べて１３％余り改善（低減）されるという結果が得られた。 In the refrigerator X, the outer casing 20 is partitioned from the space communicating with the storage chamber 1 by the cover member 50 having a low thermal conductivity (that is, high heat insulation). For this reason, in the state where the open / close door 2 is closed, the heat transfer through the front flange portion 21 and the groove-like portion 22 of the outer casing 20 between the inside of the storage chamber 1 and the outside of the refrigerator X. Is unlikely to occur.
In particular, since the cover member 50 covers the front flange portion 21 and the groove-like portion 22 through a space, there is heat insulation between the outer casing 20 and the space communicating with the storage chamber 1. It is more enhanced. Therefore, the refrigerator X has high heat insulating properties at the outer edge portion of the inlet / outlet of the object to be cooled in a state where the open / close door 2 is closed.
For example, the outer casing 20 is made of steel, the inner casing 10 and the cover member 50 are made of ABS resin, the packing member 2a is made of PVC resin, and the cover member 50 has a thickness of 1 mm. Think.
In this case, for the structure shown in FIG. 2 and FIG. 3 and the structure shown in FIG. As a result, the amount of heat leaking into the storage chamber 1 was improved (reduced) by 13% in the structure shown in FIGS. 2 and 3 compared to the structure shown in FIG.

また，前記放熱パイプ４０によって前記 前記冷蔵庫Ｘの設置環境の湿度が高い場合であっても，前記前面フランジ部２１及び前記溝状部２２が加熱されるので，その前面フランジ部２１や溝状部２２に結露が生じることを防止できる。また，前記カバー部材５０が，放熱パイプ４０により加熱された前記外側筐体２０から前記収容室１内への熱移動を遮断するため，放熱パイプ４０の熱によって前記収容室１内の温度が上昇することを防止できる。
以上の結果，前記冷蔵庫Ｘは，外気や前記放熱パイプ４０からの熱によって収容室１内の温度が上昇することが極力抑えられ，収容室１内を一定温度に維持するために要する消費電力が従来よりも小さくて済む。
なお，本発明による作用効果は，各収容室（冷蔵室１，野菜室３，製氷室５及び冷凍室７）の全てにおいて同様である。
また，前記カバー部材５０は，前記外側筐体２０の一部が前記収容室１に連通する空間に曝されないようにするものであれば，例えば，前記前面フランジ部２１及び前記溝状部２２の全体を覆うものであってもかまわない。 Moreover, even if the humidity of the installation environment of the refrigerator X is high by the heat radiating pipe 40, the front flange portion 21 and the groove-like portion 22 are heated. It is possible to prevent dew condensation from occurring on 22. Further, since the cover member 50 blocks heat transfer from the outer casing 20 heated by the heat radiating pipe 40 into the housing chamber 1, the temperature in the housing chamber 1 is increased by the heat of the heat radiating pipe 40. Can be prevented.
As a result, in the refrigerator X, the temperature inside the storage chamber 1 is suppressed as much as possible from the outside air and heat from the heat radiating pipe 40, and the power consumption required to maintain the storage chamber 1 at a constant temperature is reduced. Smaller than before.
In addition, the effect by this invention is the same in all the storage chambers (refrigeration room 1, vegetable room 3, ice making room 5, and freezer room 7).
The cover member 50 may be, for example, the front flange portion 21 and the groove-like portion 22 as long as a part of the outer casing 20 is not exposed to the space communicating with the storage chamber 1. It does not matter even if it covers the whole.

本発明は，冷蔵庫への利用が可能である。   The present invention can be used for a refrigerator.

本発明の実施形態に係る冷蔵庫Ｘにおける前面の開閉扉が開かれた状態を表す正面図。The front view showing the state where the front opening-and-closing door in refrigerator X concerning the embodiment of the present invention was opened. 冷蔵庫Ｘにおける内側筐体と外側筐体との連結構造を表す平断面図。FIG. 3 is a cross-sectional plan view illustrating a connection structure between an inner housing and an outer housing in the refrigerator X. 冷蔵庫Ｘにおける内側筐体と外側筐体との連結構造を表す拡大平断面図。FIG. 3 is an enlarged plan cross-sectional view illustrating a connection structure between an inner housing and an outer housing in the refrigerator X. 従来の冷蔵庫Ａにおける内側筐体と外側筐体との連結構造を表す平断面図。The plane sectional view showing the connection structure of the inner case and the outside case in conventional refrigerator A.

符号の説明Explanation of symbols

Ｘ…本発明の実施形態に係る冷蔵庫
１，３，５，７…収容室（冷蔵室，野菜室，製氷室，冷凍室）
２，４，６，８…開閉扉
２ａ…パッキン部材
２ｂ…磁石
１０…内側筐体
１１…内側筐体の端部
１１ａ…湾曲部
２０…外側筐体
２１…前面フランジ部
２２…溝状部
２３，２５，２６…曲げ部
２４…折り返し部
３０…発泡断熱材
４０…放熱パイプ
５０…カバー部材 X: Refrigerators 1, 3, 5, 7 according to an embodiment of the present invention. Storage room (refrigeration room, vegetable room, ice making room, freezer room)
2, 4, 6, 8 ... opening / closing door 2a ... packing member 2b ... magnet 10 ... inner housing 11 ... end 11a of inner housing ... curved portion 20 ... outer housing 21 ... front flange portion 22 ... groove-like portion 23 , 25, 26 ... bent portion 24 ... folded portion 30 ... foam insulation 40 ... heat radiating pipe 50 ... cover member

Claims (4)

前面側に被冷却物の出し入れ口が形成されその内側が前記被冷却物の収容室である内側筐体と，該内側筐体の外側に配置されて前記出し入れ口の前面側を除く部分において当該冷蔵庫の外装を形成する外側筐体と，前記出し入れ口を開閉可能な開閉扉とを備えた冷蔵庫であって，
前記外側筐体の一部に形成され，前記出し入れ口の外縁において前記開閉扉に設けられたパッキン部材がその前面側の面に密着するパッキン密着部と，
前記外側筐体の一部に形成され，前記パッキン密着部の背面側において前記内側筐体の端部が嵌入される溝状部と，
前記外側筐体よりも熱伝導率が小さい材料からなり，前記パッキン密着部及び前記溝状部のうちの少なくとも一部を覆うことにより前記開閉扉が閉じられた状態における前記パッキン密着部及び前記溝状部を前記収容室に連通する空間から仕切るカバー部材と，
を具備してなることを特徴とする冷蔵庫。 In the front side, an inlet / outlet port for the object to be cooled is formed, and the inside of the inner case serves as a storage chamber for the object to be cooled, and the portion disposed outside the inner case and excluding the front side of the inlet / outlet port A refrigerator comprising an outer casing forming an exterior of the refrigerator, and an opening / closing door capable of opening and closing the entrance / exit,
A packing contact portion formed in a part of the outer casing, and a packing member provided on the opening / closing door at an outer edge of the outlet / entrance, in close contact with the front surface;
A groove-shaped part formed in a part of the outer casing and into which an end of the inner casing is fitted on the back side of the packing contact part;
The packing contact portion and the groove in a state in which the door is closed by covering at least a part of the packing contact portion and the groove-shaped portion, which is made of a material having a lower thermal conductivity than the outer casing. A cover member for partitioning the shape portion from a space communicating with the storage chamber;
The refrigerator characterized by comprising. 前記カバー部材が，空間を介して前記パッキン密着部及び前記溝状部のうちの少なくとも一部を覆うものである請求項１に記載の冷蔵庫。   The refrigerator according to claim 1, wherein the cover member covers at least a part of the packing contact portion and the groove-like portion through a space. 前記パッキン密着部及び前記溝状部の近傍に，前記収容室内を冷凍サイクルにより冷却する冷却手段における放熱パイプが配設されてなる請求項１又は２のいずれかに記載の冷蔵庫。   The refrigerator according to claim 1, wherein a heat radiating pipe in a cooling means for cooling the storage chamber by a refrigeration cycle is disposed in the vicinity of the packing contact portion and the groove-like portion. 前記外側筐体が金属製の部材であり，前記内側筐体及び前記カバー部材が樹脂製の部材である請求項１〜３のいずれかに記載の冷蔵庫。   The refrigerator according to any one of claims 1 to 3, wherein the outer casing is a metal member, and the inner casing and the cover member are resin members.

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