JP2008298356A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of improving volume efficiency, with respect to the refrigerator having a discharge passage for discharging cold air produced by a cooler to a storage compartment and a return passage for returning cold air from the storage compartment to the cooler. <P>SOLUTION: This refrigerator comprises the storage compartment 3 for cooling and storing stored objects, the cooler 5 for producing cold air, the discharge passage 20 having a discharge port 20b for discharging the cold air to the storage compartment 3 and guiding the cold air produced by the cooler 5 to the storage compartment 3, and the return passage 23 having return ports 23a, 23b in which the cold air flows from the storage compartment 3, and returning the cold air flowing in from the return ports 23a, 23b to the cooler 5, the discharge passage 20 and the return passage 23 are juxtaposed on the same wall surface of the storage compartment 3, and a member 27 composed of a platy good conductor of heat is disposed at a side facing to the storage compartment 3, of the discharge passage 20 or the return passage 23. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、冷却器で生成した冷気を貯蔵室に吐出する吐出通路と貯蔵室から冷却器に冷気を戻す戻り通路とを有した冷蔵庫に関する。   The present invention relates to a refrigerator having a discharge passage for discharging cool air generated by a cooler to a storage chamber and a return passage for returning the cool air from the storage chamber to the cooler.

従来の冷蔵庫は特許文献１に開示されている。図１２、図１３はこの冷蔵庫の概略構成を示す正面断面図及び側面断面図である。冷蔵庫１は上部に冷凍室２が設けられ、冷凍室２の下方には冷蔵室３が設けられる。冷凍室２と冷蔵室３とは断熱材を充填した仕切壁４により仕切られる。冷凍室２の前面は扉２ａにより開閉され、冷蔵室３の前面は扉３ａにより開閉される。   A conventional refrigerator is disclosed in Patent Document 1. 12 and 13 are a front sectional view and a side sectional view showing a schematic configuration of the refrigerator. The refrigerator 1 is provided with a freezer compartment 2 at the top, and a refrigerator compartment 3 below the freezer compartment 2. The freezer compartment 2 and the refrigerator compartment 3 are partitioned by a partition wall 4 filled with a heat insulating material. The front surface of the freezer compartment 2 is opened and closed by a door 2a, and the front surface of the refrigerator compartment 3 is opened and closed by a door 3a.

冷凍室２の背面には冷気を生成する冷却器５が配され、冷却器５の上方には送風ファン６が配される。冷却器５及び送風ファン６は冷凍室２の背面に設けた冷凍室ダクト（不図示）内に配される。冷凍室ダクトには冷凍室３に臨んで開口する戻り口（不図示）が冷却器５の下方に設けられる。   A cooler 5 that generates cool air is disposed on the back of the freezer compartment 2, and a blower fan 6 is disposed above the cooler 5. The cooler 5 and the blower fan 6 are arranged in a freezer compartment duct (not shown) provided on the back surface of the freezer compartment 2. The freezer duct is provided with a return port (not shown) that opens toward the freezer 3 below the cooler 5.

冷却器５の側方には送風ファン６の排気側に連結される連通路７が設けられる。冷蔵室３の背面の左右方向の中央部には連通路７に連通する吐出通路８が鉛直方向に延びて設けられる。吐出通路８の両側部には冷気を吐出する吐出口８ａが開口する。仕切壁４内には冷蔵室３の前部に開口する戻り口９ａを有した戻り通路９が設けられる。戻り通路９は冷却器５の下方で冷凍室３の冷凍室ダクトに接続される。   A communication passage 7 connected to the exhaust side of the blower fan 6 is provided on the side of the cooler 5. A discharge passage 8 that communicates with the communication passage 7 extends in the vertical direction at a central portion in the left-right direction on the back surface of the refrigerator compartment 3. Discharge ports 8 a for discharging cool air are opened on both sides of the discharge passage 8. In the partition wall 4, a return passage 9 having a return port 9 a that opens at the front of the refrigerator compartment 3 is provided. The return passage 9 is connected to the freezer compartment duct of the freezer compartment 3 below the cooler 5.

上記構成の冷蔵庫１において、冷却器５と熱交換して生成される冷気は送風ファン６の駆動によって矢印Ｄ１に示すように冷凍室２内に吐出される。冷凍室２に吐出された冷気は冷凍室２内を流通して貯蔵物を冷却し、冷凍室ダクトの戻り口を介して冷却器５に戻る。   In the refrigerator 1 having the above configuration, the cold air generated by exchanging heat with the cooler 5 is discharged into the freezer compartment 2 as indicated by an arrow D 1 by driving the blower fan 6. The cold air discharged into the freezer compartment 2 flows through the freezer compartment 2 to cool the stored items, and returns to the cooler 5 through the return port of the freezer compartment duct.

また、冷凍室ダクトを流通する冷気は送風ファン６の排気側で分岐し、矢印Ｄ２に示すように連通路７を流通して吐出通路８を流通する。吐出通路８を流通する冷気は吐出口８ａから矢印Ｄ３に示すように冷蔵室３内に吐出される。冷蔵室３内に吐出された冷気は冷蔵室３内を流通して貯蔵物を冷却し、矢印Ｄ４に示すように冷蔵室３の前部で戻り口９ａから戻り通路９に流入する。戻り通路９を流通する冷気は矢印Ｄ５に示すように冷凍室３の冷凍室ダクトを介して冷却器５に戻る。   The cold air flowing through the freezer compartment duct branches on the exhaust side of the blower fan 6 and flows through the communication passage 7 and the discharge passage 8 as indicated by the arrow D2. The cold air flowing through the discharge passage 8 is discharged from the discharge port 8a into the refrigerator compartment 3 as indicated by an arrow D3. The cold air discharged into the refrigerator compartment 3 flows through the refrigerator compartment 3 to cool the stored items, and flows into the return passage 9 from the return port 9a at the front portion of the refrigerator compartment 3 as indicated by an arrow D4. The cold air flowing through the return passage 9 returns to the cooler 5 through the freezer compartment duct of the freezer compartment 3 as indicated by an arrow D5.

特許第３８９２８１４号公報（第４頁−第８頁、第１図）Japanese Patent No. 3892814 (pages 4-8, FIG. 1)

しかしながら、上記従来の冷蔵庫１によると、戻り通路９を流通する冷気は冷蔵室３内を流通する間に貯蔵物の水分等を含むため、凍結し易くなる。このため、仕切壁４内の戻り通路９の上下に所定の厚みの断熱材を設ける必要があり、仕切壁４の厚みが大きくなる。従って、冷蔵庫１の内容積が小さくなり、容積効率が低くなる問題があった。   However, according to the conventional refrigerator 1, the cold air flowing through the return passage 9 contains water and the like of stored items while flowing through the refrigerating chamber 3, and thus is easily frozen. For this reason, it is necessary to provide a heat insulating material having a predetermined thickness above and below the return passage 9 in the partition wall 4, and the thickness of the partition wall 4 increases. Therefore, there is a problem that the internal volume of the refrigerator 1 is reduced and the volumetric efficiency is lowered.

本発明は、容積効率を向上できる冷蔵庫を提供することを目的とする。   An object of this invention is to provide the refrigerator which can improve volumetric efficiency.

上記目的を達成するために本発明は、貯蔵物を冷却保存する貯蔵室と、冷気を生成する冷却器と、前記貯蔵室に冷気を吐出する吐出口を有して前記冷却器で生成した冷気を前記貯蔵室に導く吐出通路と、前記貯蔵室から冷気が流入する戻り口を有して前記戻り口から流入した冷気を前記冷却器に戻す戻り通路とを備え、前記吐出通路と前記戻り通路とを前記貯蔵室の背面に並設し、前記吐出通路または前記戻り通路の前記貯蔵室に面した側に配された板状の熱良導体から成る部材を設けたことを特徴としている。   In order to achieve the above object, the present invention provides a storage room that cools and preserves stored items, a cooler that generates cool air, and a cool air generated by the cooler having a discharge port that discharges cool air into the storage room. A discharge passage for guiding the air to the storage chamber, and a return passage having a return port through which cool air flows from the storage chamber and returning the cool air flowing in from the return port to the cooler, the discharge passage and the return passage Are arranged in parallel on the back surface of the storage chamber, and a member made of a plate-like heat good conductor disposed on the side of the discharge passage or the return passage facing the storage chamber is provided.

この構成によると、冷却器で生成された冷気は貯蔵室の背面に設けた吐出通路を流通し、吐出口から貯蔵室内に吐出される。貯蔵室内に吐出された冷気は貯蔵室内を流通して貯蔵物を冷却し、吐出通路に並設された戻り通路に戻り口を介して流入する。戻り通路を流通する冷気は冷却器に戻される。また、吐出通路または戻り通路を流通する冷気の冷熱が金属板等の熱良導体から成る部材を介して貯蔵室内に放出される。部材により吐出通路及び戻り通路の一方を覆ってもよく、両方を覆ってもよい。   According to this configuration, the cold air generated by the cooler flows through the discharge passage provided on the back surface of the storage chamber and is discharged from the discharge port into the storage chamber. The cool air discharged into the storage chamber flows through the storage chamber to cool the stored item, and flows into the return passage arranged in parallel with the discharge passage through the return port. The cold air flowing through the return passage is returned to the cooler. Further, the cold heat of the cold air flowing through the discharge passage or the return passage is discharged into the storage chamber through a member made of a good heat conductor such as a metal plate. One of the discharge passage and the return passage may be covered by the member, or both may be covered.

また本発明は、上記構成の冷蔵庫において、上下に延びる複数の通路を有して前記壁面に取り付けられるダクトにより前記吐出通路と前記戻り通路とを一体に形成したことを特徴としている。   In the refrigerator having the above-described configuration, the discharge passage and the return passage are integrally formed by a duct having a plurality of passages extending vertically and attached to the wall surface.

また本発明は、上記構成の冷蔵庫において、前記戻り通路の両側方にそれぞれ前記吐出通路を配置し、前記戻り口が前記戻り通路の下部に配置されるとともに前記吐出口が前記戻り口よりも上方で前記吐出通路の側面に配置されることを特徴としている。   In the refrigerator configured as described above, the discharge passage may be disposed on both sides of the return passage, the return port may be disposed below the return passage, and the discharge port may be located above the return port. It is arranged on the side surface of the discharge passage.

この構成によると、貯蔵室の背面の中央部に戻り通路が設けられ、戻り通路の左右に吐出通路が設けられる。吐出通路を流通する冷気は両側面の上方に配された吐出口から部材の開口を介して側方に吐出され、貯蔵室内を降下した後に略中央部の戻り口に導かれる。   According to this configuration, the return passage is provided in the center of the back surface of the storage chamber, and the discharge passage is provided on the left and right of the return passage. The cool air flowing through the discharge passage is discharged from the discharge port disposed above both side surfaces to the side through the opening of the member, and after being lowered in the storage chamber, is guided to the return port in the substantially central portion.

また本発明は、上記構成の冷蔵庫において、前記部材よりも前面側に突出するとともに上面に凹部が形成される突出部を前記部材の下方に設けたことを特徴としている。この構成によると、部材に発生した結露が部材を流下して突出部の凹部に貯溜される。   Moreover, the present invention is characterized in that in the refrigerator having the above-described configuration, a protruding portion that protrudes to the front side of the member and has a recess formed on the upper surface is provided below the member. According to this structure, the dew condensation generated on the member flows down the member and is stored in the concave portion of the protruding portion.

また本発明は、上記構成の冷蔵庫において、前記部材は前記吐出通路及び前記戻り通路の周囲まで延びて前記貯蔵室の背面を覆うことを特徴としている。この構成によると、部材は貯蔵室の背面の広い面積を覆い、吐出通路または戻り通路を流通する冷気の冷熱が部材を熱伝導して広い範囲から放出される。   In the refrigerator having the above-described configuration, the member extends to the periphery of the discharge passage and the return passage to cover the back surface of the storage chamber. According to this configuration, the member covers a large area on the back surface of the storage chamber, and the cold air flowing through the discharge passage or the return passage is conducted through the member and discharged from a wide range.

また本発明は、上記構成の冷蔵庫において、仕切部により隔離されて前記貯蔵室の下部に設けられる隔離室と、前記仕切部により上面が塞がれるとともに周囲に隙間を有して前記隔離室内に配される収納ケースとを備え、前記貯蔵室の前部で前記仕切部の上下が連通し、前記隔離室に流入する冷気が前記収納ケースの周囲を流通して前記戻り口に導かれることを特徴としている。   Further, the present invention provides a refrigerator having the above-described configuration, an isolation chamber that is isolated by a partition portion and provided at a lower portion of the storage chamber, and an upper surface that is blocked by the partition portion and that has a gap around the isolation chamber. A storage case that is arranged, wherein the upper and lower sides of the partitioning portion communicate with each other at the front portion of the storage chamber, and the cold air flowing into the isolation chamber flows around the storage case and is guided to the return port. It is a feature.

この構成によると、吐出口から貯蔵室に吐出される冷気は貯蔵室内を降下し、貯蔵室の前部で仕切部の下方の隔離室に流入する。隔離室に流入した冷気は収納ケースの周囲を流通し、戻り口から戻り通路に流入する。戻り口は仕切部よりも上方に配されてもよく、仕切部よりも下方に配されてもよい。   According to this configuration, the cold air discharged from the discharge port into the storage chamber descends in the storage chamber and flows into the isolation chamber below the partition portion at the front portion of the storage chamber. The cold air that has flowed into the isolation chamber flows around the storage case and flows into the return passage from the return port. The return port may be disposed above the partition part or may be disposed below the partition part.

また本発明は、上記構成の冷蔵庫において、前記貯蔵室の上方に冷凍室を設け、前記冷却器を前記冷凍室の背面に配置したことを特徴としている。   Moreover, the present invention is characterized in that in the refrigerator configured as described above, a freezing room is provided above the storage room, and the cooler is disposed on the back surface of the freezing room.

本発明によると、貯蔵室の背面に冷気を吐出する吐出通路と冷気を冷却器に戻す戻り通路とを並設したので、他の貯蔵室との仕切壁に戻り通路を設ける必要がなく仕切壁の厚みを小さくすることができる。従って、冷蔵庫の容積効率を向上することができる。また、吐出通路または戻り通路を流通した冷気の冷熱が部材を熱伝導して貯蔵室の背面の広い範囲から放出されるため、貯蔵室内を均一に冷却することができる。   According to the present invention, since the discharge passage for discharging cold air and the return passage for returning the cold air to the cooler are arranged in parallel on the back surface of the storage chamber, there is no need to provide a return passage in the partition wall with the other storage chamber. Can be reduced in thickness. Therefore, the volumetric efficiency of the refrigerator can be improved. Further, since the cold heat of the cold air flowing through the discharge passage or the return passage is conducted through the member and released from a wide area on the back surface of the storage chamber, the storage chamber can be uniformly cooled.

また本発明によると、複数の通路を有して壁面に取り付けられるダクトにより吐出通路と戻り通路とを一体に形成したので、部品点数を削減して吐出通路と戻り通路とを並設した冷蔵庫を簡単に実現することができる。   According to the present invention, since the discharge passage and the return passage are integrally formed by a duct having a plurality of passages and attached to the wall surface, a refrigerator in which the number of parts is reduced and the discharge passage and the return passage are arranged in parallel is provided. It can be realized easily.

また本発明によると、戻り通路の両側方に吐出通路を配置して戻り口が下部に配置され、吐出口が上部の側面に配置されるので、貯蔵室の側方に吐出された冷気が降下して略中央部の戻り口に戻る。従って、貯蔵室内を冷気が循環し、ショートサーキットを防止して冷却効率を向上できるとともに貯蔵室内の温度をより均一にすることができる。   Further, according to the present invention, the discharge passage is arranged on both sides of the return passage, the return port is arranged at the lower part, and the discharge port is arranged on the side surface of the upper part, so that the cold air discharged to the side of the storage chamber is lowered. Then return to the return port in the approximate center. Therefore, the cold air circulates in the storage chamber, so that a short circuit can be prevented and the cooling efficiency can be improved, and the temperature in the storage chamber can be made more uniform.

また本発明によると、前方へ突出して上面に凹部を有した突出部を部材の下方に設けたので、部材の結露が流下して凹部に貯溜される。これにより、凹部に貯溜された結露水が蒸発して貯蔵室内の乾燥を防止することができる。   Further, according to the present invention, since the protruding portion that protrudes forward and has a recess on the upper surface is provided below the member, the dew condensation of the member flows down and is stored in the recess. Thereby, the dew condensation water stored in the recess can be evaporated to prevent drying in the storage chamber.

また本発明によると、部材が吐出通路及び戻り通路の周囲まで延びて貯蔵室の背面を覆うので、貯蔵室の背面のより広い範囲から貯蔵室内に冷熱を放出することができる。従って、貯蔵室の温度をより均一にすることができる。   Further, according to the present invention, the member extends to the periphery of the discharge passage and the return passage to cover the back surface of the storage chamber, so that cold heat can be discharged into the storage chamber from a wider range of the back surface of the storage chamber. Therefore, the temperature of the storage chamber can be made more uniform.

また本発明によると、隔離室を仕切る仕切部により上面が塞がれる収納ケースを周囲に隙間を有して隔離室内に配し、貯蔵室の前部で仕切部の上下が連通して冷気が収納ケースの周囲を流通して戻り口に導かれるので、収納ケース内の貯蔵物を間接冷却して貯蔵物の乾燥を防止することができる。   Further, according to the present invention, the storage case whose upper surface is closed by the partition portion that partitions the isolation chamber is arranged in the isolation chamber with a gap around the periphery, and the upper and lower sides of the partition portion communicate with each other at the front portion of the storage chamber to generate cold air. Since it circulates around the storage case and is guided to the return port, the stored item in the storage case can be indirectly cooled to prevent the stored item from drying.

また本発明によると、貯蔵室の上方に設けた冷凍室の背面に冷却器を配置したので、冷却器から吐出通路に冷気が容易に導かれ、戻り通路から冷却器に冷気が容易に導かれる。従って、冷気が流通する経路の圧力損失を低減することができる。また、貯蔵室と冷凍室とを仕切る仕切壁に戻り通路を設けると低温の冷凍室により冷気内の水分が凍結し易くなるが、戻り通路が背面に設けられるため容易に凍結を防止できる。   According to the present invention, since the cooler is disposed on the back of the freezer compartment provided above the storage chamber, the cool air is easily guided from the cooler to the discharge passage, and the cool air is easily guided from the return passage to the cooler. . Therefore, it is possible to reduce the pressure loss of the path through which the cold air flows. In addition, if a return passage is provided in the partition wall that partitions the storage chamber and the freezer compartment, moisture in the cold air is easily frozen by the low-temperature freezer compartment, but freezing can be easily prevented because the return passage is provided on the back surface.

以下に本発明の実施形態を図面を参照して説明する。説明の便宜上、前述の図１２、図１３に示す従来例と同様の部分には同一の符号を付している。図１、図２は一実施形態の冷蔵庫を示す側面断面図及び正面断面図である。冷蔵庫１は上部に冷凍室２が設けられ、冷凍室２の下方には冷蔵室３（貯蔵室）が設けられる。冷凍室２と冷蔵室３とは断熱材を充填した仕切壁４により仕切られる。冷凍室２の前面は扉２ａにより開閉され、冷蔵室３の前面は扉３ａにより開閉される。   Embodiments of the present invention will be described below with reference to the drawings. For convenience of explanation, the same reference numerals are assigned to the same parts as those in the conventional example shown in FIGS. 1 and 2 are a side sectional view and a front sectional view showing a refrigerator according to one embodiment. The refrigerator 1 is provided with a freezer compartment 2 at the top, and a refrigerator compartment 3 (storage compartment) is provided below the freezer compartment 2. The freezer compartment 2 and the refrigerator compartment 3 are partitioned by a partition wall 4 filled with a heat insulating material. The front surface of the freezer compartment 2 is opened and closed by a door 2a, and the front surface of the refrigerator compartment 3 is opened and closed by a door 3a.

冷凍室２の背面には冷凍室ダクト１０が設けられる。冷凍室ダクト１０の前面側の上部には吐出口１０ａが設けられ、下部には戻り口１０ｂが設けられる。冷凍室ダクト１０内には冷気を生成する冷却器５が配され、冷却器５の上方に送風ファン６が配される。冷却器５の下方には冷却器５の除霜水を回収するドレンパン１１が設けられる。また、冷凍室ダクト１０は送風ファン６の排気側で分岐して冷却器５の右方に配された連通路７を有している。   A freezer compartment duct 10 is provided on the back of the freezer compartment 2. A discharge port 10a is provided in the upper part on the front side of the freezer compartment duct 10, and a return port 10b is provided in the lower part. A cooler 5 that generates cool air is disposed in the freezer compartment duct 10, and a blower fan 6 is disposed above the cooler 5. Below the cooler 5, a drain pan 11 that collects defrosted water from the cooler 5 is provided. Further, the freezer compartment duct 10 has a communication passage 7 that branches off on the exhaust side of the blower fan 6 and is arranged on the right side of the cooler 5.

冷蔵室３の上部にはチルド温度帯等の低温保存が可能な低温ケース１８が配される。低温ケース１８の背面は開口し、後述する吐出口２０ｃから冷気が流入する。低温ケース１８の下方には透明な樹脂成形品により形成して貯蔵物を載置する複数の載置棚１３が設けられる。載置棚１３は冷蔵室３の側壁に突設された複数のレール１３ａの上面に載せられ、高さ方向の位置を貯蔵物にあわせて適時変えられるようになっている。   A low-temperature case 18 capable of low-temperature storage such as a chilled temperature zone is disposed at the upper part of the refrigerator compartment 3. The back surface of the low-temperature case 18 is opened, and cold air flows from a discharge port 20c described later. Below the low-temperature case 18, a plurality of mounting shelves 13 that are formed of a transparent resin molded product and on which stored items are placed are provided. The mounting shelf 13 is placed on the upper surface of a plurality of rails 13a projecting from the side wall of the refrigerator compartment 3, and the position in the height direction can be changed in time according to the stored item.

冷蔵室３の下部には隔離室から成る野菜室１６が設けられる。野菜室１６は樹脂成形品により形成された板状の仕切部１４により冷蔵室３の上部と仕切られる。仕切部１４の上下は仕切部１４の前方の連通部１４ａで連通する。また、仕切部１４の後端には開口部１４ｂが設けられる。野菜室１６内には仕切部１４により上面が塞がれる収納ケース１５が出し入れ自在に配される。収納ケース１５は野菜室１６の壁面との間に冷気が流通する隙間１６ａを有して配される。   A vegetable room 16 comprising an isolation room is provided at the lower part of the refrigerator compartment 3. The vegetable compartment 16 is partitioned from the upper part of the refrigerator compartment 3 by a plate-shaped partition 14 formed of a resin molded product. The upper and lower sides of the partition part 14 communicate with each other through a communication part 14 a in front of the partition part 14. An opening 14 b is provided at the rear end of the partition 14. In the vegetable compartment 16, a storage case 15 whose upper surface is closed by the partition 14 is arranged to be freely put in and out. The storage case 15 is arranged with a gap 16 a through which cold air flows between the wall of the vegetable compartment 16.

冷蔵室３の背面には鉛直方向に延びた吐出通路２０及び戻り通路２３が並設される。吐出通路２０は戻り通路２３の左右にそれぞれ配された左通路２１及び右通路２２を有している。左通路２１の左側面及び右通路２２の右側面には冷気を吐出する複数の吐出口２０ｂがそれぞれ設けられる。   A discharge passage 20 and a return passage 23 extending in the vertical direction are arranged in parallel on the rear surface of the refrigerator compartment 3. The discharge passage 20 has a left passage 21 and a right passage 22 disposed on the left and right sides of the return passage 23, respectively. A plurality of discharge ports 20b for discharging cool air are provided on the left side surface of the left passage 21 and the right side surface of the right passage 22, respectively.

戻り通路２３の上部前方には前面を透明なランプカバー３１で覆われたランプ３０が配される。載置棚１３が透明な樹脂から成るためランプ３０の出射光は各載置棚１３を透過する。これにより、冷蔵室３の下部まで照明することができる。また、ランプ３０は後述する金属製の部材２７の上方に配される。このため、ランプ３０の出射光は部材２７で反射し、冷蔵室３内をより明るくすることができる。   A lamp 30 whose front surface is covered with a transparent lamp cover 31 is disposed in front of the upper portion of the return passage 23. Since the mounting shelf 13 is made of a transparent resin, the light emitted from the lamp 30 passes through each mounting shelf 13. Thereby, it can illuminate to the lower part of the refrigerator compartment 3. The lamp 30 is disposed above a metal member 27 described later. For this reason, the emitted light of the lamp 30 is reflected by the member 27, and the inside of the refrigerator compartment 3 can be made brighter.

載置棚１３に開口を設けると、冷蔵室３の下部まで照明光が届きやすくすることができる。また、吐出口２０ｂから吐出される冷気を下段の載置棚１３に導いて各載置棚１３上の貯蔵物をより冷却することができる。この時、載置棚１３の開口の周囲に補強のためのリブ状の突起を設けるとよい。また、透明なランプカバー３１をランプ３０下方まで覆うように配置すると、ランプ３０の出射光が冷蔵室３の下部まで届きやすくなる。   If an opening is provided in the mounting shelf 13, illumination light can easily reach the lower part of the refrigerator compartment 3. In addition, the cool air discharged from the discharge port 20b can be guided to the lower mounting shelf 13 to further cool the stored items on each mounting shelf 13. At this time, rib-shaped protrusions for reinforcement may be provided around the opening of the mounting shelf 13. Further, if the transparent lamp cover 31 is disposed so as to cover the lamp 30, the emitted light from the lamp 30 can easily reach the lower part of the refrigerator compartment 3.

また、戻り通路２３を流通する冷気の冷熱が後述するパネル３３（図４参照）を介してランプカバー３１内に放出される。これにより、ランプ３０を冷却してランプ３０の発熱による冷蔵室３の昇温を低減することができる。ランプ３０の駆動を制御する制御部をランプカバー３１内に設け、ランプカバー３１内を電装ボックスとしてもよい。この場合も、電装ボックス内の発熱が戻り通路２３を流通する冷気の冷熱によって冷却される。   Further, the cold heat of the cold air flowing through the return passage 23 is discharged into the lamp cover 31 through a panel 33 (see FIG. 4) described later. Thereby, the lamp 30 can be cooled, and the temperature rise of the refrigerator compartment 3 due to the heat generated by the lamp 30 can be reduced. A control unit for controlling the driving of the lamp 30 may be provided in the lamp cover 31, and the inside of the lamp cover 31 may be used as an electrical box. Also in this case, the heat generated in the electrical box is cooled by the cold heat of the cold air flowing through the return passage 23.

また、戻り通路２３に臨む開口部をランプカバー３１内に設けてもよい。これにより、開口部を介してランプカバー３１内の空気が戻り通路２３に吸い込まれる。このため、ランプ３０の発熱による冷蔵室３の昇温をより低減することができる。   An opening facing the return passage 23 may be provided in the lamp cover 31. Thereby, the air in the lamp cover 31 is sucked into the return passage 23 through the opening. For this reason, the temperature increase of the refrigerator compartment 3 due to the heat generated by the lamp 30 can be further reduced.

図３は図２のＡ−Ａ断面図を示している。吐出通路２０及び戻り通路２３は複数の通路を有した発泡樹脂成形品の断熱材から成るダクト２６を冷蔵室３の背壁に取り付けて形成される。吐出通路２０と戻り通路２３とはダクト２６に形成されたリブ２６ｄ、２６ｅにより隔離される。これにより、吐出通路２０と戻り通路２３とが一体に形成され、部品点数を削減することができる。   FIG. 3 shows a cross-sectional view taken along the line AA of FIG. The discharge passage 20 and the return passage 23 are formed by attaching a duct 26 formed of a heat insulating material of a foamed resin molded product having a plurality of passages to the back wall of the refrigerator compartment 3. The discharge passage 20 and the return passage 23 are isolated by ribs 26 d and 26 e formed in the duct 26. Thereby, the discharge passage 20 and the return passage 23 are integrally formed, and the number of parts can be reduced.

ダクト２６の上記各通路は断熱材によって隔てられる。このため、吐出通路２０を流通する冷気と戻り通路２３を流通する冷気に温度差があっても、これらの間の冷熱の受け渡し量が微小となる。このため、吐出通路２０を流通する冷気の冷熱が戻り通路２３を流通する冷気に伝達されることによる冷蔵室３の冷却効率の低下を防止することができる。   The passages of the duct 26 are separated by a heat insulating material. For this reason, even if there is a temperature difference between the cold air flowing through the discharge passage 20 and the cold air flowing through the return passage 23, the amount of cold heat transferred between them becomes minute. For this reason, it is possible to prevent the cooling efficiency of the refrigerator compartment 3 from being lowered due to the cold heat of the cold air flowing through the discharge passage 20 being transmitted to the cold air flowing through the return passage 23.

図４は図３の要部詳細図を示している。ダクト２６の前面側は樹脂成形品のパネル３３により覆われる。ダクト２６とパネル３３とは夫々に設けた凹部と凸部とが係合して一体となり、冷蔵室３の背面に着脱自在に取り付けられている。パネル３３は両側端部が後方に屈曲し、開放されたダクト２６の側面を覆う。パネル３３の側面に形成した開口によって吐出通路２０の吐出口２０ｂが形成されている。   FIG. 4 shows a detailed view of the main part of FIG. The front side of the duct 26 is covered with a panel 33 of a resin molded product. The duct 26 and the panel 33 are integrally formed by engaging a concave portion and a convex portion provided respectively, and are detachably attached to the back surface of the refrigerator compartment 3. Both ends of the panel 33 are bent backward to cover the side surface of the opened duct 26. A discharge port 20 b of the discharge passage 20 is formed by an opening formed on the side surface of the panel 33.

パネル３３の前面側は板状の部材２７により覆われている。部材２７はアルミニウムやステンレス等の金属板により形成され、高い熱伝導率を有する。熱伝導率の高い樹脂により部材２７を形成してもよい。部材２７は両側端部が後方に屈曲し、吐出口２０ｂに面した開口部２７ａが形成される。開口部２７ａはコ字型の切り込みを切り起こして形成され、この切り起こしによって係合爪２７ｂが形成される。   The front side of the panel 33 is covered with a plate-like member 27. The member 27 is formed of a metal plate such as aluminum or stainless steel, and has a high thermal conductivity. The member 27 may be formed of a resin having high thermal conductivity. Both ends of the member 27 are bent backward, and an opening 27a facing the discharge port 20b is formed. The opening 27a is formed by cutting and raising a U-shaped cut, and the engagement claw 27b is formed by this cutting and raising.

係合爪２７ｂはパネル３３に設けた吐出口２０ｂの前端及びダクト２６の背面側に係合する。これにより、部材２７が冷蔵室３の背面に取り付けられる。部材２７は弾性変形により係合爪２７ｂの係合を解除して容易に着脱することができる。係合爪２７ｂをパネル３３の後端に係合するように形成してもよい。   The engaging claw 27 b is engaged with the front end of the discharge port 20 b provided in the panel 33 and the back side of the duct 26. Thereby, the member 27 is attached to the back surface of the refrigerator compartment 3. The member 27 can be easily attached and detached by releasing the engagement of the engagement claw 27b by elastic deformation. The engaging claw 27 b may be formed to engage with the rear end of the panel 33.

部材２７によって吐出通路２０及び戻り通路２３を流通する冷気の冷熱が冷蔵室３内に放出される。これにより、冷蔵室３の温度分布を均一にすることができる。この時、吐出通路２０を流通する冷気の温度（約−１２〜−８℃）は戻り通路２３を流通する冷気の温度（約−２〜１℃）よりも低くなっている。しかし、吐出通路２０及び戻り通路２３が並設されるため部材２７の表面が熱伝導によって一様な温度になり、冷蔵室３の温度分布を容易に均一にすることができる。   The cold energy of the cold air flowing through the discharge passage 20 and the return passage 23 is released into the refrigerator compartment 3 by the member 27. Thereby, the temperature distribution of the refrigerator compartment 3 can be made uniform. At this time, the temperature of the cold air flowing through the discharge passage 20 (about −12 to −8 ° C.) is lower than the temperature of the cold air flowing through the return passage 23 (about −2 to 1 ° C.). However, since the discharge passage 20 and the return passage 23 are arranged side by side, the surface of the member 27 becomes a uniform temperature by heat conduction, and the temperature distribution in the refrigerator compartment 3 can be easily made uniform.

また、ダクト２６には戻り通路２３に面した断熱材の背面側に凹部２６ｃが設けられる。これにより、吐出通路２０に面した部分よりも戻り通路２３に面した部分の断熱材の厚みが薄く形成される。このため、戻り通路２３から部材２７に伝わる単位面積当たりの冷熱量と吐出通路２０から部材２７に伝わる単位面積当たり冷熱量とを同程度にできる。従って、部材２７の表面温度のばらつきを更に低減できるため、冷蔵室３の温度分布をより均一にすることができる。また、より低温の冷気が流通する吐出通路２０に面した断熱材の厚みを厚くして部材２７表面の結露を抑制することができる。   The duct 26 is provided with a recess 26 c on the back side of the heat insulating material facing the return passage 23. Thereby, the thickness of the heat insulating material in the portion facing the return passage 23 is made thinner than the portion facing the discharge passage 20. For this reason, the amount of cold per unit area transmitted from the return passage 23 to the member 27 and the amount of cold per unit area transmitted from the discharge passage 20 to the member 27 can be made comparable. Therefore, since the variation in the surface temperature of the member 27 can be further reduced, the temperature distribution in the refrigerator compartment 3 can be made more uniform. In addition, it is possible to suppress the condensation on the surface of the member 27 by increasing the thickness of the heat insulating material facing the discharge passage 20 through which cooler cold air flows.

尚、凹部２６ｃを複数設けてもよい。また、凹部２６ｃに替えて貫通孔を断熱材に形成してもよい。同様に、パネル３３の厚みを吐出通路２０に面した部分よりも戻り通路２３に面した部分を薄く形成してもよい。   A plurality of recesses 26c may be provided. Further, instead of the recess 26c, a through hole may be formed in the heat insulating material. Similarly, the portion of the panel 33 facing the return passage 23 may be formed thinner than the portion of the panel 33 facing the discharge passage 20.

また、係合爪２７ｂは吐出口２０ｂに係合するため、吐出口２０ｂから吐出される冷気の冷熱が係合爪２７ｂを介して部材２７に伝えられる。従って、部材２７から放出される冷熱量をより増加させることができる。   Further, since the engaging claw 27b engages with the discharge port 20b, the cold air discharged from the discharge port 20b is transmitted to the member 27 through the engaging claw 27b. Therefore, the amount of cold heat released from the member 27 can be further increased.

パネル３３の下部には前方に突出する突出部３３ａが設けられている。図５は突出部３３ａの詳細を示す側面断面図である。突出部３３ａの下面前部には下方に突出する凸部３３ｂが設けられる。突出部３３ａは断熱箱体３５の内箱３５ａに形成した段差部３５ｂに後端が係止され、凸部３３ｂが仕切部１４の上面に当接する。これにより、突出部３３ａが安定して支持される。また、突出部３３ａの前面及び下面に戻り口２３ａ、２３ｂが形成される。   A protrusion 33 a that protrudes forward is provided at the lower portion of the panel 33. FIG. 5 is a side sectional view showing details of the protruding portion 33a. A convex portion 33b that protrudes downward is provided at the lower front portion of the protruding portion 33a. The rear end of the protruding portion 33 a is locked to the step portion 35 b formed in the inner box 35 a of the heat insulating box 35, and the convex portion 33 b comes into contact with the upper surface of the partition portion 14. Thereby, the protrusion part 33a is supported stably. In addition, return ports 23a and 23b are formed on the front surface and the lower surface of the protruding portion 33a.

突出部３３ａは部材２７よりも前方に延びて部材２７の下方に形成される。部材２７の下端は突出部３３ａの上方でパネル３３から前方に延びた支持部３３ｃにより支持される。突出部３３ａの上面には切欠き部３３ｄが形成され、切欠き部３３ｄに受け部材３４が取り付けられる。   The protruding portion 33 a extends forward of the member 27 and is formed below the member 27. The lower end of the member 27 is supported by a support portion 33c extending forward from the panel 33 above the protruding portion 33a. A notch 33d is formed on the upper surface of the protrusion 33a, and the receiving member 34 is attached to the notch 33d.

受け部材３４は樹脂成形品から成り、上面を開口した凹部３４ａが形成される。凹部３４ａの周縁には外側に突出した突出部３４ｃが形成される。前部の突出部３４ｃの下方には凸部３４ｂが設けられる。後部の突出部３４ｃをパネル３３の垂直面に設けた溝部３３ｅに差し込み、凸部３４ｂが切欠き部３３ｄに押し込まれる。これにより、前部の突出部３４ｃと凸部３４ｂによって切欠き部３３ｄの前端が挟まれ、受け部材３４が取り付けられる。   The receiving member 34 is made of a resin molded product, and is formed with a recess 34a having an upper surface opened. A protrusion 34c protruding outward is formed on the periphery of the recess 34a. A convex portion 34b is provided below the front protruding portion 34c. The rear protrusion 34c is inserted into a groove 33e provided on the vertical surface of the panel 33, and the convex 34b is pushed into the notch 33d. Thereby, the front end of the notch 33d is sandwiched between the protrusion 34c and the protrusion 34b at the front, and the receiving member 34 is attached.

突出部３３ａは部材２７の下方に配されるため、部材２７で発生した結露は凹部３４ａに流下する。これにより、凹部３４ａに貯溜された結露水が蒸発して冷蔵室３内の乾燥を抑制することができる。受け部材３４と切欠き部３３ｄとをシール材等による接着や溶着すると、突出部３３ａ内部への結露水の侵入を防止することができる。   Since the protruding portion 33a is disposed below the member 27, the dew condensation generated in the member 27 flows down to the recess 34a. Thereby, the dew condensation water stored by the recessed part 34a can evaporate, and the drying in the refrigerator compartment 3 can be suppressed. By adhering or welding the receiving member 34 and the notch 33d with a sealant or the like, it is possible to prevent the intrusion of condensed water into the protrusion 33a.

尚、凹部３４ａと突出部３３ａの下面の凸部３３ｂに手指を掛けてパネル３３を容易に着脱することができる。   The panel 33 can be easily attached and detached by placing fingers on the concave portion 34a and the convex portion 33b on the lower surface of the protruding portion 33a.

部材２７の前面に水平方向に延びた凹凸を設け、部材２７で発生した結露を該凹凸で保持してもよい。これにより、部材２７表面の凹凸に保持された結露水が蒸発して冷蔵室３内の乾燥を更に抑制することができる。   Concavities and convexities extending in the horizontal direction may be provided on the front surface of the member 27, and the condensation generated on the member 27 may be retained by the concavities and convexities. Thereby, the dew condensation water hold | maintained at the unevenness | corrugation of the member 27 evaporates, and it can further suppress the drying in the refrigerator compartment 3. FIG.

図６は吐出通路２０を通る断面を示す側面断面図である。吐出通路２０は上部でダンパ１７を介して連通路７に連通する。また、図７は図２のＢ−Ｂ断面図を示している。吐出通路２０はダンパ１７の下方で戻り通路２３の前面側に配された分岐部２０ａを有している。吐出通路２０は分岐部２０ａで左右の左通路２１及び右通路２２（図２参照）に分岐する。   FIG. 6 is a side sectional view showing a section passing through the discharge passage 20. The discharge passage 20 communicates with the communication passage 7 via the damper 17 at the upper portion. FIG. 7 is a cross-sectional view taken along the line BB in FIG. The discharge passage 20 has a branch portion 20 a disposed below the damper 17 on the front side of the return passage 23. The discharge passage 20 branches into a left and right left passage 21 and a right passage 22 (see FIG. 2) at a branching portion 20a.

図２において、戻り通路２３は上部で左右に分岐した第１、第２分岐路２４、２５を有している。図８は戻り通路２３を通る断面を示す側面断面図である。第１、第２分岐路２４、２５は冷凍室ダクト１０の背面側に配される。冷却器５の下方で冷凍室ダクト１０の背面側に開口した連通口２４ａ、２５ａを介して冷凍室ダクト１０と第１、第２分岐路２４、２５とが連通する。   In FIG. 2, the return passage 23 has first and second branch passages 24, 25 that branch left and right at the top. FIG. 8 is a side sectional view showing a section passing through the return passage 23. The first and second branch paths 24 and 25 are disposed on the back side of the freezer compartment duct 10. The freezer compartment duct 10 and the first and second branch passages 24 and 25 communicate with each other through communication ports 24a and 25a opened to the back side of the freezer compartment duct 10 below the cooler 5.

戻り通路２３は前面側を覆う部材２７の下端に正面に開口する戻り口２３ａが設けられる。また、戻り通路２３は下面が開口し、開口部１４ｂ（図１参照）に面した戻り口２３ｂが形成される。戻り口２３ａ、２３ｂは仕切部１４（図１参照）の上側に配される。   The return passage 23 is provided with a return port 23a that opens to the front at the lower end of a member 27 that covers the front side. Further, the return passage 23 has an open bottom surface, and a return port 23b facing the opening 14b (see FIG. 1) is formed. The return ports 23a and 23b are arranged on the upper side of the partition portion 14 (see FIG. 1).

ドレンパン１１の排水口１１ａの下方には排水パイプ１２の受け部１２ａが配される。図８に示すように、受け部１２ａは第１、第２分岐路２４、２５の前方に配される。排水パイプ１２は受け部１２ａから第１、第２分岐路２４、２５の間を通って後方に延び、戻り通路２３の背後に配されて下方に延びる。ドレンパン１１に溜まる除霜水は排水パイプ１２を介して蒸発皿（不図示）に排水される。従って、戻り通路２３は第１、第２分岐路２４、２５に分岐して流路面積が縮小されず、戻り通路２３と排水パイプ１２の干渉を簡単に防止することができる。   A receiving portion 12 a of the drain pipe 12 is disposed below the drain port 11 a of the drain pan 11. As shown in FIG. 8, the receiving portion 12 a is disposed in front of the first and second branch paths 24 and 25. The drain pipe 12 extends rearward from the receiving portion 12a through the first and second branch paths 24 and 25, and is disposed behind the return passage 23 and extends downward. The defrost water collected in the drain pan 11 is drained to an evaporating dish (not shown) through the drain pipe 12. Therefore, the return passage 23 branches into the first and second branch passages 24 and 25 and the flow passage area is not reduced, and interference between the return passage 23 and the drainage pipe 12 can be easily prevented.

上記構成の冷蔵庫１において、送風ファン６の駆動によって冷凍室ダクト１０を流通する空気は冷却器５と熱交換して冷気が生成される。冷却器５により生成された冷気は吐出口１０ａから矢印Ｅ１（図１参照）に示すように冷凍室２内に吐出される。冷凍室２に吐出された冷気は冷凍室２内を流通して貯蔵物を冷却し、戻り口１０ｂを介して冷却器５に戻る。   In the refrigerator 1 having the above-described configuration, air flowing through the freezer compartment duct 10 is driven by the blower fan 6 to exchange heat with the cooler 5 to generate cold air. The cool air generated by the cooler 5 is discharged into the freezer compartment 2 from the discharge port 10a as indicated by an arrow E1 (see FIG. 1). The cold air discharged into the freezer compartment 2 flows through the freezer compartment 2 to cool the stored items, and returns to the cooler 5 through the return port 10b.

また、送風ファン６の排気側で冷気は矢印Ｅ２（図２、図６参照）に示すように分岐し、連通路７を流通する。連通路７を流通する冷気はダンパ１７を介して吐出通路２０に流入し、分岐部２０ａで分岐する。吐出通路２０に流入した冷気の一部は矢印Ｅ３（図１参照）に示すように分岐部２０ａから吐出口２０ｃを介して低温ケース１８内に吐出される。低温ケース１８はダンパ１７を通過した冷気が直ちに多量に供給されるため低温に維持される。低温ケース１８内を流通した冷気は主に低温ケース１８の前面側から冷蔵室３内に流出する。   Further, the cold air is branched on the exhaust side of the blower fan 6 as shown by an arrow E <b> 2 (see FIGS. 2 and 6) and flows through the communication path 7. The cold air flowing through the communication passage 7 flows into the discharge passage 20 via the damper 17 and branches at the branch portion 20a. A part of the cold air flowing into the discharge passage 20 is discharged into the low temperature case 18 from the branch portion 20a through the discharge port 20c as shown by an arrow E3 (see FIG. 1). The low temperature case 18 is maintained at a low temperature because a large amount of cold air that has passed through the damper 17 is immediately supplied. The cold air flowing through the low temperature case 18 flows out into the refrigerating chamber 3 mainly from the front side of the low temperature case 18.

尚、低温ケース１８内の冷気の冷熱や冷却された貯蔵物の冷熱は低温ケース１８の下面から下方へ放出される。低温ケース１８の下方に配された貯蔵物は低温ケース１８の前方に送られる冷気の降下により直接冷却され、低温ケース１８の下面側から放出される冷熱により間接冷却される。   The cold air in the low-temperature case 18 and the cold heat of the stored items are released downward from the lower surface of the low-temperature case 18. The stored items arranged below the low temperature case 18 are directly cooled by the cool air sent to the front of the low temperature case 18 and indirectly cooled by the cold heat released from the lower surface side of the low temperature case 18.

これにより、後述する吐出口２０ｂから吐出される冷気の量を少なくしても冷蔵室３の下部を充分冷却することができる。特に下段の吐出口２０ｂから吐出される冷気量を抑えることができることになる。従って、冷気が貯蔵物に直接当ることによる貯蔵物の乾燥を極力抑制できるようになる。   Thereby, the lower part of the refrigerator compartment 3 can be sufficiently cooled even if the amount of cold air discharged from the discharge port 20b described later is reduced. In particular, the amount of cool air discharged from the lower discharge port 20b can be suppressed. Therefore, it becomes possible to suppress the drying of the stored product as much as possible by the cold air directly hitting the stored product.

更に、パネル３３の前方に設けた部材２７によって吐出通路２０及び戻り通路２３の少なくとも一方からの冷熱によって低温ケース１８の下方が間接冷却される。このため、更に吐出口２０ｂから吐出される冷気量を少なくしても均一に冷却することができ、貯蔵物の乾燥をより低減できる。特に生もの等の貯蔵物（例えば、ショートケーキ、生菓子、野菜、果物等）の乾燥による劣化を抑制することができる。   Furthermore, the member 27 provided in front of the panel 33 indirectly cools the lower portion of the low-temperature case 18 by cold heat from at least one of the discharge passage 20 and the return passage 23. For this reason, even if it reduces the amount of cool air discharged from the discharge port 20b, it can cool uniformly and can further reduce the drying of the stored product. In particular, deterioration due to drying of stored items such as raw foods (for example, short cakes, fresh confectionery, vegetables, fruits, etc.) can be suppressed.

分岐部２０ａで分岐した冷気は吐出通路２０の左通路２１及び右通路２２を矢印Ｅ４、Ｅ５（図２、図６参照）に示すように流下する。吐出通路２０を流下する冷気は吐出口２０ｂから矢印Ｅ６（図１〜図３参照）に示すように冷蔵室３内に吐出される。この時、吐出口２０ｂは左通路２１及び右通路２２の側面に設けられるため、図２、図３に示すように側方に向けて吐出される。また、吐出通路２０を流下する冷気の冷熱が部材２７を介して冷蔵室３に放出される。   The cold air branched at the branch portion 20a flows down the left passage 21 and the right passage 22 of the discharge passage 20 as shown by arrows E4 and E5 (see FIGS. 2 and 6). The cold air flowing down the discharge passage 20 is discharged from the discharge port 20b into the refrigerating chamber 3 as indicated by an arrow E6 (see FIGS. 1 to 3). At this time, since the discharge port 20b is provided on the side surfaces of the left passage 21 and the right passage 22, the discharge port 20b is discharged toward the side as shown in FIGS. Further, the cold heat of the cold air flowing down the discharge passage 20 is released to the refrigerator compartment 3 through the member 27.

冷蔵室３内に吐出された冷気は矢印Ｅ７（図１、図６参照）に示すように載置棚１３に沿って前方へ流通する。吐出口２０ｂが上下方向に複数設けられるので複数の載置棚１３により仕切られた各段の貯蔵物を容易に冷却することができる。尚、吐出口２０ｂが設けられない段の貯蔵物の場合は、上下の載置棚１３に沿って流通する冷気により載置棚１３を介して間接的に冷却される。   The cool air discharged into the refrigerator compartment 3 circulates forward along the mounting shelf 13 as shown by an arrow E7 (see FIGS. 1 and 6). Since a plurality of discharge ports 20b are provided in the vertical direction, the stored items at each stage partitioned by the plurality of mounting shelves 13 can be easily cooled. In addition, in the case of a stored item at a stage where the discharge port 20 b is not provided, the stored item is indirectly cooled via the mounting shelf 13 by the cold air flowing along the upper and lower mounting shelves 13.

載置棚１３に沿って流通する冷気は載置棚１３の前方で矢印Ｅ８（図１、図６参照）に示すように降下する。冷蔵室３の前部を降下する冷気の一部は仕切部１４上を矢印Ｅ９（図１参照）に示すように流通し、正面側の戻り口２３ａを介して戻り通路２３に流入する。   The cold air flowing along the mounting shelf 13 descends in front of the mounting shelf 13 as indicated by an arrow E8 (see FIGS. 1 and 6). A part of the cool air descending the front part of the refrigerator compartment 3 circulates on the partition 14 as shown by an arrow E9 (see FIG. 1) and flows into the return passage 23 through the return port 23a on the front side.

また、冷蔵室３の前部を降下する冷気の一部は仕切部１４の前方の連通部１４ａを介して野菜室１６内に流入する。野菜室１６に流入した冷気は矢印Ｅ１０（図１参照）に示すように収納ケース１５の周囲の隙間１６ａを流通する。尚、隙間１６ａは収納ケース１５の側方にも設けられる。   Further, a part of the cold air descending the front part of the refrigerator compartment 3 flows into the vegetable compartment 16 via the communication part 14 a in front of the partition part 14. The cold air that has flowed into the vegetable compartment 16 circulates in the gap 16a around the storage case 15 as shown by an arrow E10 (see FIG. 1). The gap 16 a is also provided on the side of the storage case 15.

収納ケース１５の周囲を流通する冷気は後方の開口部１４ｂを介して仕切部１４の上方に流通し、下面側の戻り口２３ｂを介して戻り通路２３に流入する。収納ケース１５は上面を塞ぐ仕切部１４に沿って流通する冷気（Ｅ９）と、周囲の隙間１６ａを流通する冷気（Ｅ１０）によって内部の貯蔵物が間接冷却される。   The cool air flowing around the storage case 15 flows above the partition 14 via the rear opening 14b and flows into the return passage 23 via the return port 23b on the lower surface side. In the storage case 15, the stored items inside are indirectly cooled by the cool air (E 9) that flows along the partition 14 that closes the upper surface and the cool air (E 10) that flows through the surrounding gap 16 a.

戻り通路２３に流入した冷気は矢印Ｅ１１（図２、図８参照）に示すように上昇する。戻り通路２３を上昇する冷気の冷熱は部材２７を介して冷蔵室３内に放出される。戻り通路２３を上昇する冷気は矢印Ｅ１２、Ｅ１３（図２、図８参照）に示すように第１、第２分岐路２４、２５に分岐する。第１、第２分岐路２４、２５を流通する冷気は連通口２４ａ、２５ａを介して冷凍室ダクト１０に流入し、冷却器５に戻る。   The cold air that has flowed into the return passage 23 rises as shown by an arrow E11 (see FIGS. 2 and 8). The cold heat of the cold air rising up the return passage 23 is released into the refrigerator compartment 3 through the member 27. The cool air rising in the return passage 23 branches to the first and second branch paths 24 and 25 as shown by arrows E12 and E13 (see FIGS. 2 and 8). The cold air flowing through the first and second branch passages 24 and 25 flows into the freezer compartment duct 10 through the communication ports 24a and 25a and returns to the cooler 5.

左右に設けた連通口２４ａ、２５ａを介して冷気を冷却器５に戻すため、連通口２４ａ、２５ａの開口面積を適切に形成することによって冷却器５に戻る冷気量を調整できる。これにより、冷却器５の霜付きの状態を容易に調整することができ、左右方向で均一に霜を付着させることができる。   Since the cool air is returned to the cooler 5 through the communication ports 24a and 25a provided on the left and right, the amount of cool air returning to the cooler 5 can be adjusted by appropriately forming the opening areas of the communication ports 24a and 25a. Thereby, the state with the frost of the cooler 5 can be adjusted easily, and frost can be made to adhere uniformly in the left-right direction.

従って、除霜の効率を向上することができ、除霜時間の短縮による省電力化を図ることができる。特に、冷却器５の左右方向の幅が大きい場合に該効果が大きい。このため、冷却器５の左右方向の幅を大きくすると、冷却器５の熱交換量が増加して冷却効率の向上が図られるとともに除霜時の電力消費を抑制することができる。   Accordingly, the efficiency of defrosting can be improved, and power saving can be achieved by shortening the defrosting time. This effect is particularly great when the width of the cooler 5 in the left-right direction is large. For this reason, when the width in the left-right direction of the cooler 5 is increased, the heat exchange amount of the cooler 5 is increased, and the cooling efficiency is improved, and the power consumption during defrosting can be suppressed.

本実施形態によると、冷蔵室３の同じ壁面である背面に冷気を吐出する吐出通路２０と冷気を冷却器５に戻す戻り通路２３とを並設したので、従来例のように冷凍室２との仕切壁４に戻り通路を設ける必要がなく仕切壁４の厚みを小さくすることができる。従って、冷蔵庫１の容積効率を向上することができる。   According to the present embodiment, the discharge passage 20 that discharges cold air and the return passage 23 that returns the cold air to the cooler 5 are arranged in parallel on the back surface, which is the same wall surface of the refrigerator compartment 3, so There is no need to provide a return passage in the partition wall 4, and the thickness of the partition wall 4 can be reduced. Therefore, the volumetric efficiency of the refrigerator 1 can be improved.

特に、仕切壁４が低温の冷凍室２に隣接するため仕切壁４に戻り通路を設けると冷気内の水分が凍結し易くなるが、戻り通路２３が背面に設けられるため容易に凍結を防止できる。また、冷却器５が冷凍室２の背面に配されるため冷却器５から背面の吐出通路２０に冷気が容易に導かれ、背面の戻り通路２３から冷却器５に冷気が容易に導かれる。従って、冷気が流通する経路の圧力損失を低減することができる。尚、吐出通路２０及び戻り通路２３を貯蔵室の側壁面に並設してもよい。   In particular, since the partition wall 4 is adjacent to the low-temperature freezer compartment 2, if a return passage is provided in the partition wall 4, moisture in the cold air is likely to freeze, but since the return passage 23 is provided on the back surface, freezing can be easily prevented. . Further, since the cooler 5 is arranged on the back surface of the freezer compartment 2, the cool air is easily guided from the cooler 5 to the discharge passage 20 on the back surface, and the cool air is easily guided to the cooler 5 from the return passage 23 on the back surface. Therefore, it is possible to reduce the pressure loss of the path through which the cold air flows. The discharge passage 20 and the return passage 23 may be provided side by side on the side wall surface of the storage chamber.

また、吐出通路２０及び戻り通路２３を流通した冷気の冷熱が熱良導体から成る部材２７を熱伝導して冷蔵室３の背面の広い範囲から放出されるため、冷蔵室３内を均一に冷却することができる。部材２７によって吐出通路２０及び戻り通路２３の一方を覆ってもよい。   Further, since the cold heat of the cold air flowing through the discharge passage 20 and the return passage 23 is conducted through the member 27 made of a good heat conductor and is released from a wide area on the back surface of the refrigerator compartment 3, the inside of the refrigerator compartment 3 is uniformly cooled. be able to. One of the discharge passage 20 and the return passage 23 may be covered by the member 27.

また、部材２７を吐出通路２０及び戻り通路２３の周囲まで延びて冷蔵室３の背面を覆うようにしてもよい。これにより、冷蔵室３の背面のより広い範囲から冷蔵室３内に冷熱を放出することができる。従って、冷蔵室３の温度をより均一にすることができる。   Further, the member 27 may extend to the periphery of the discharge passage 20 and the return passage 23 so as to cover the back surface of the refrigerator compartment 3. Thereby, cold heat can be discharged into the refrigerator compartment 3 from a wider range on the back of the refrigerator compartment 3. Therefore, the temperature of the refrigerator compartment 3 can be made more uniform.

また、戻り通路２３の両側方に左通路２１及び右通路２２を配置して戻り口２３ａが下部に配置され、吐出口２０ｂが上部の左通路２１及び右通路２２の側面に配置されるので、冷蔵室３の側方に吐出された冷気が降下して略中央部の戻り口２３ａに戻る。従って、冷蔵室３内を冷気が循環し、ショートサーキットを防止して冷却効率を向上できるとともに冷蔵室３内の温度を均一にすることができる。吐出口２０ｂは戻り通路２３から離れた側部に配置されていれば正面に向けて形成してもよい。   Further, the left passage 21 and the right passage 22 are disposed on both sides of the return passage 23, the return port 23a is disposed at the lower portion, and the discharge port 20b is disposed on the side surfaces of the upper left passage 21 and the right passage 22. The cool air discharged to the side of the refrigerator compartment 3 descends and returns to the return port 23a at the substantially central portion. Therefore, cold air circulates in the refrigerating chamber 3 to prevent a short circuit and improve the cooling efficiency, and to make the temperature in the refrigerating chamber 3 uniform. The discharge port 20b may be formed toward the front as long as the discharge port 20b is disposed on a side portion away from the return passage 23.

また、部材２７が吐出口２０ｂに対応して開口して吐出口２０ｂに係合する係合爪２７ｂを有するので、部材２７を容易に着脱することができる。従って、部材２７及びダクト２６の前面側のパネル３３を簡単に清掃することができ、冷蔵室３内を清潔に維持することができる。加えて、開口部２７ａを切り起こして係合爪２７ｂを容易に形成することができる。   Moreover, since the member 27 has the engaging claw 27b which opens corresponding to the discharge port 20b and engages with the discharge port 20b, the member 27 can be easily attached and detached. Therefore, the member 27 and the panel 33 on the front side of the duct 26 can be easily cleaned, and the inside of the refrigerator compartment 3 can be kept clean. In addition, the engaging claw 27b can be easily formed by cutting and raising the opening 27a.

次に、図９は第２実施形態の冷蔵庫の冷蔵室背壁部分の詳細を示す上面断面図である。また、図１０は図９のＨ部詳細図である。説明の便宜上、前述の図１〜図８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第１実施形態のパネル３３に替えてパネル３６が設けられ、ダクト２６及び部材２７の形状が第１実施形態と一部異なっている。その他の部分は第１実施形態と同様である。   Next, FIG. 9 is a top sectional view showing details of the back wall portion of the refrigerator compartment of the refrigerator of the second embodiment. FIG. 10 is a detailed view of part H in FIG. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. In this embodiment, a panel 36 is provided instead of the panel 33 of the first embodiment, and the shapes of the duct 26 and the member 27 are partially different from those of the first embodiment. Other parts are the same as those in the first embodiment.

樹脂成形品から成るパネル３６は前面側の両端部にコ字型に屈曲する溝部３６ａが形成される。断熱材から成るダクト２６には溝部３６ａを逃げる凹部２６ｆが形成される。溝部３６ａの側壁には係合孔（不図示）が設けられる。部材２７は両端部が後方に折曲され、後方に延びた部分に設けた係合爪（不図示）が溝部３６ａの係合孔に係合する。これにより、吐出通路２０及び戻り通路２３の前面側を覆う部材２７が着脱自在に取り付けられる。   The panel 36 made of a resin molded product is provided with groove portions 36a that are bent in a U shape at both ends on the front side. The duct 26 made of a heat insulating material is formed with a recess 26f that escapes the groove 36a. An engagement hole (not shown) is provided on the side wall of the groove 36a. Both ends of the member 27 are bent rearward, and an engaging claw (not shown) provided in a portion extending rearward engages with the engaging hole of the groove 36a. Thereby, the member 27 which covers the front side of the discharge passage 20 and the return passage 23 is detachably attached.

また、パネル３６は図１１の正面図に示すように正面側に複数の開口部３６ｂが形成される。これにより、パネル３６の重量を削減して取付けを容易にすることができる。   Moreover, as shown in the front view of FIG. 11, the panel 36 has a plurality of openings 36b on the front side. Thereby, the weight of the panel 36 can be reduced and attachment can be made easy.

本実施形態によると、第１実施形態と同様の効果を得ることができる。また、前述の図４に示す第１実施形態では背面側に設けた係合爪２７ｂにより部材２７が取り付けられるが、本実施形態では側面に設けた係合爪により部材２７が取り付けられる。従って、部材２７をより簡単に着脱することができる。部材２７に係合孔を設けて溝部３６ａに係合爪を形成してもよい。   According to this embodiment, the same effect as that of the first embodiment can be obtained. Further, in the first embodiment shown in FIG. 4 described above, the member 27 is attached by the engaging claw 27b provided on the back surface side, but in this embodiment, the member 27 is attached by the engaging claw provided on the side surface. Therefore, the member 27 can be attached and detached more easily. An engagement hole may be provided in the member 27 to form an engagement claw in the groove 36a.

第１、第２実施形態において、戻り口２３ａ、２３ｂと吐出口２０ｂとの間を載置棚１３により仕切るとより望ましい。これにより、吐出口２０ｂから吐出された冷気のショートサーキットをより確実に防止することができる。従って、冷却効率がより向上するとともに、冷蔵室３内の温度をより均一にすることができる。これにより、背面に吐出通路２０と戻り通路２３を設けて仕切壁４の厚みを少なくして冷蔵室３の容積を大きくしても、冷却効率のよい冷蔵庫１を得ることができる。   In the first and second embodiments, it is more desirable to partition the return ports 23a, 23b and the discharge port 20b by the mounting shelf 13. Thereby, the short circuit of the cool air discharged from the discharge port 20b can be prevented more reliably. Therefore, the cooling efficiency can be further improved and the temperature in the refrigerator compartment 3 can be made more uniform. Thereby, even if the discharge passage 20 and the return passage 23 are provided on the rear surface, the thickness of the partition wall 4 is reduced, and the volume of the refrigerator compartment 3 is increased, the refrigerator 1 with good cooling efficiency can be obtained.

また、野菜室１６を仕切る仕切部１４により上面が塞がれる収納ケース１５を周囲に隙間１６ａを有して野菜室１６内に配し、戻り通路２３を配した背面から離れた前面側で仕切部１４の上下が連通して冷気が収納ケース１５の周囲を流通して戻り口２３ｂに導かれるので、収納ケース１５内の貯蔵物を間接冷却して貯蔵物の乾燥を防止することができる。   In addition, a storage case 15 whose upper surface is closed by a partition 14 that partitions the vegetable compartment 16 is arranged in the vegetable compartment 16 with a gap 16a around it, and is partitioned on the front side away from the rear side where the return passage 23 is arranged. Since the upper and lower portions of the portion 14 communicate with each other and the cool air flows around the storage case 15 and is guided to the return port 23b, the stored item in the storage case 15 can be indirectly cooled to prevent the stored item from drying.

また、戻り口２３ａ、２３ｂが仕切部１４の上側に配され、仕切部１４が戻り口２３ａ、２３ｂ近傍で開口するので、仕切部１４の上面に沿って冷気を容易に流通させて収納ケース１５内をより冷却することができる。また、野菜室１６を流通した冷気を簡単に戻り口２３ｂに導くことができる。   Moreover, since the return ports 23a and 23b are arranged on the upper side of the partition part 14 and the partition part 14 opens near the return ports 23a and 23b, it is possible to easily circulate cool air along the upper surface of the partition part 14 and store the case 15 The inside can be further cooled. Moreover, the cold air which distribute | circulated the vegetable compartment 16 can be easily guide | induced to the return port 23b.

また、戻り口２３ａ、２３ｂが戻り通路２３の正面と下面とに設けられるので、仕切部１４の上面に沿って流通する冷気が正面側の戻り口２３ａに流入し、野菜室１６を流通して仕切部１４の開口部１４ｂを上昇する冷気が下面側の戻り口２３ｂに流入する。従って、冷気が円滑に流通して圧力損失を低くすることができる。尚、戻り通路２３を野菜室１６内まで延設して戻り口２３ｂを野菜室１６内に設けてもよい。   Moreover, since the return ports 23a and 23b are provided on the front and lower surfaces of the return passage 23, the cold air flowing along the upper surface of the partition 14 flows into the front return port 23a and flows through the vegetable compartment 16. Cold air rising through the opening 14b of the partition 14 flows into the return port 23b on the lower surface side. Therefore, cold air can flow smoothly and pressure loss can be reduced. The return passage 23 may be extended into the vegetable compartment 16 and the return port 23 b may be provided in the vegetable compartment 16.

本発明によると、冷気を吐出する吐出通路と冷気を冷却器に戻す戻り通路とを有する冷蔵庫に利用することができる。   ADVANTAGE OF THE INVENTION According to this invention, it can utilize for the refrigerator which has the discharge channel which discharges cold air, and the return channel | path which returns cold air to a cooler.

本発明の第１実施形態の冷蔵庫を示す側面断面図Side surface sectional drawing which shows the refrigerator of 1st Embodiment of this invention. 本発明の第１実施形態の冷蔵庫を示す正面断面図Front sectional drawing which shows the refrigerator of 1st Embodiment of this invention. 図２のＡ−Ａ断面図AA sectional view of FIG. 図３の要部詳細図Detailed view of the main part of FIG. 本発明の第１実施形態の冷蔵庫の突出部の詳細を示す側面断面図Side surface sectional drawing which shows the detail of the protrusion part of the refrigerator of 1st Embodiment of this invention 本発明の第１実施形態の冷蔵庫の吐出通路を通る断面を示す側面断面図Side surface sectional drawing which shows the cross section which passes along the discharge passage of the refrigerator of 1st Embodiment of this invention. 図２のＢ−Ｂ断面図BB sectional view of FIG. 本発明の第１実施形態の冷蔵庫の戻り通路を通る断面を示す側面断面図Side surface sectional drawing which shows the cross section which passes along the return channel | path of the refrigerator of 1st Embodiment of this invention 本発明の第２実施形態の冷蔵庫の冷蔵庫の背壁部分を示す上面断面図Top surface sectional drawing which shows the back wall part of the refrigerator of the refrigerator of 2nd Embodiment of this invention 図９のＨ部詳細図Detailed view of part H in FIG. 本発明の第２実施形態の冷蔵庫の冷蔵庫のパネルを示す正面図The front view which shows the panel of the refrigerator of the refrigerator of 2nd Embodiment of this invention. 従来の冷蔵庫を示す正面断面図Front sectional view showing a conventional refrigerator 従来の冷蔵庫を示す側面断面図Side sectional view showing a conventional refrigerator

符号の説明Explanation of symbols

１ 冷蔵庫
２ 冷凍室
３ 冷蔵室
４ 仕切壁
５ 冷却器
６ 送風ファン
７ 連通路
８、２０ 吐出通路
８ａ、２０ｂ、２０ｃ 吐出口
９、２３ 戻り通路
９ａ、２３ａ、２３ｂ 戻り口
１０ 冷凍室ダクト
１１ ドレンパン
１２ 排水パイプ
１３ 載置棚
１４ 仕切部
１４ｂ 開口部
１５ 収納ケース
１６ 野菜室
１７ ダンパ
１８ 低温ケース
２１ 左通路
２２ 右通路
２４ 第１分岐路
２５ 第２分岐路
２６ ダクト
２７ 部材
２７ｂ 係合爪
３０ ランプ
３１ ランプカバー
３３、３６ パネル
３３ａ 突出部
３４ 受け部材
３４ａ 凹部
３５ 断熱箱体
３５ａ 内箱 DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Freezing room 3 Refrigerating room 4 Partition wall 5 Cooler 6 Blower fan 7 Communication path 8, 20 Discharge path 8a, 20b, 20c Discharge port 9, 23 Return path 9a, 23a, 23b Return port 10 Freezer chamber duct 11 Drain pan DESCRIPTION OF SYMBOLS 12 Drain pipe 13 Mounting shelf 14 Partition part 14b Opening part 15 Storage case 16 Vegetable room 17 Damper 18 Low temperature case 21 Left channel 22 Right channel 24 First branch channel 25 Second branch channel 26 Duct 27 Member 27b Engagement claw 30 Lamp 31 Lamp cover 33, 36 Panel 33a Protruding part 34 Receiving member 34a Concave part 35 Heat insulation box 35a Inner box

Claims (7)

貯蔵物を冷却保存する貯蔵室と、冷気を生成する冷却器と、前記貯蔵室に冷気を吐出する吐出口を有して前記冷却器で生成した冷気を前記貯蔵室に導く吐出通路と、前記貯蔵室から冷気が流入する戻り口を有して前記戻り口から流入した冷気を前記冷却器に戻す戻り通路とを備え、前記吐出通路と前記戻り通路とを前記貯蔵室の背面に並設し、前記吐出通路または前記戻り通路の前記貯蔵室に面した側に配された板状の熱良導体から成る部材を設けたことを特徴とする冷蔵庫。   A storage chamber that cools and stores the stored material; a cooler that generates cold air; a discharge passage that discharges the cold air into the storage chamber and guides the cold air generated by the cooler to the storage chamber; and A return passage through which cool air flows from the storage chamber returns to the cooler, and the discharge passage and the return passage are arranged in parallel on the back of the storage chamber. A refrigerator comprising a member made of a plate-like heat good conductor disposed on a side of the discharge passage or the return passage facing the storage chamber. 上下に延びる複数の通路を有して前記貯蔵室の背面に取り付けられるダクトにより前記吐出通路と前記戻り通路とを一体に形成したことを特徴とする請求項１に記載の冷蔵庫。   The refrigerator according to claim 1, wherein the discharge passage and the return passage are integrally formed by a duct having a plurality of passages extending vertically and attached to a back surface of the storage chamber. 前記戻り通路の両側方にそれぞれ前記吐出通路を配置し、前記戻り口が前記戻り通路の下部に配置されるとともに前記吐出口が前記戻り口よりも上方で前記吐出通路の側面に配置されることを特徴とする請求項２に記載の冷蔵庫。   The discharge passages are disposed on both sides of the return passage, the return port is disposed at a lower portion of the return passage, and the discharge port is disposed on a side surface of the discharge passage above the return port. The refrigerator according to claim 2. 前記部材よりも前面側に突出するとともに上面に凹部が形成される突出部を前記部材の下方に設けたことを特徴とする請求項２または請求項３に記載の冷蔵庫。   The refrigerator according to claim 2 or 3, wherein a protruding portion that protrudes to the front side of the member and has a recess formed on the upper surface is provided below the member. 前記部材は前記吐出通路及び前記戻り通路の周囲まで延びて前記貯蔵室の背面を覆うことを特徴とする請求項１〜請求項４のいずれかに記載の冷蔵庫。   The refrigerator according to any one of claims 1 to 4, wherein the member extends to the periphery of the discharge passage and the return passage to cover the back surface of the storage chamber. 仕切部により隔離されて前記貯蔵室の下部に設けられる隔離室と、前記仕切部により上面が塞がれるとともに周囲に隙間を有して前記隔離室内に配される収納ケースとを備え、前記貯蔵室の前部で前記仕切部の上下が連通し、前記隔離室に流入する冷気が前記収納ケースの周囲を流通して前記戻り口に導かれることを特徴とする請求項１〜請求項５のいずれかに記載の冷蔵庫。   An isolation chamber that is isolated by a partition and provided at a lower portion of the storage chamber; and a storage case that is closed in the upper surface by the partition and has a clearance around the storage chamber, and is disposed in the isolation chamber. The upper and lower sides of the partition part communicate with each other at the front part of the chamber, and cool air flowing into the isolation chamber flows around the storage case and is guided to the return port. The refrigerator in any one. 前記貯蔵室の上方に冷凍室を設け、前記冷却器を前記冷凍室の背面に配置したことを特徴とする請求項１〜請求項６のいずれかに記載の冷蔵庫。   The refrigerator according to any one of claims 1 to 6, wherein a freezing room is provided above the storage room, and the cooler is disposed on a back surface of the freezing room.

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