JP2015017737A

JP2015017737A - Refrigerator

Info

Publication number: JP2015017737A
Application number: JP2013144242A
Authority: JP
Inventors: 暢志郎小池; Nobushiro Koike
Original assignee: Hitachi Appliances Inc
Current assignee: Hitachi Appliances Inc
Priority date: 2013-07-10
Filing date: 2013-07-10
Publication date: 2015-01-29

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator preventing a vegetable chamber adjacent to a freezing chamber from being refrigerated due to cold air of the freezing chamber.SOLUTION: A cold air blocking member for preventing cold air from flowing into a space between a bottom surface wall of a storage container and a heat insulation partition wall forming a freezing chamber, and the cold air refrigerating the storage container is prevented from flowing into the space between the heat insulation partition wall and the bottom surface wall of the storage container by the cold air blocking member. According to such the structure, returned cold air flowed out from the storage container of the freezing chamber is prevented from passing through a top surface of the heat insulation partition wall partitioning the freezing chamber from the vegetable chamber, so that the heat insulation partition wall becomes hardly refrigerated. As a result, the vegetable chamber is prevented from being refrigerated by the cold air of the freezing chamber.

Description

本発明は食品や飲料水等を冷蔵或いは冷凍して貯留する冷蔵庫に係り、特に冷凍室の下方に野菜室を配置した冷蔵庫に関するものである。 The present invention relates to a refrigerator that stores food, drinking water, and the like by refrigeration or freezing, and particularly relates to a refrigerator in which a vegetable room is disposed below a freezing room.

最近の冷蔵庫では、冷蔵庫を構成する箱体内部の上部に冷蔵室、中間部に冷凍室、下部に野菜室を配置し、それぞれの貯蔵室同士は熱の移動が少ないように断熱仕切壁により区画されている。つまり、冷凍室と隣接する冷蔵室や野菜室に冷凍室の冷熱が流入しないように、冷凍室と隣接する冷蔵室や野菜室は真空断熱材やポリウレタンフォームが配置された断熱仕切壁によって区画されている。 In recent refrigerators, a refrigerator room is placed in the upper part of the box that constitutes the refrigerator, a freezer room is placed in the middle part, and a vegetable room is placed in the lower part. Has been. In other words, the refrigerator compartment and vegetable compartment adjacent to the freezer compartment are partitioned by a heat insulating partition wall with vacuum insulation and polyurethane foam so that the cold heat of the freezer compartment does not flow into the refrigerator compartment or vegetable compartment adjacent to the freezer compartment. ing.

そして、冷蔵庫として一般的に主流である間冷式冷蔵庫（冷却器で冷やされた冷気を、送風ファンによって冷凍室、冷蔵室、野菜室に吹き出す冷気強制循環方式の冷蔵庫）では、冷蔵庫内部に冷気を生成する冷凍サイクルを備え、この冷凍サイクルの冷却器で生成された冷気を送風機により各貯蔵室に循環させて貯蔵物の冷却を行っている。このような間冷式冷蔵庫は、例えば特開２０１１-２５７０８２号公報（特許文献１）において開示されている。 And in the cold-cooled refrigerator (cold air forced circulation system refrigerator in which the cold air cooled by the cooler is blown out to the freezer room, the refrigerator room, and the vegetable room by a blower fan) which is generally mainstream as a refrigerator, The refrigeration cycle for generating the refrigeration cycle is provided, and the cool air generated by the cooler of the refrigeration cycle is circulated to each storage chamber by a blower to cool the stored items. Such an intercooled refrigerator is disclosed in, for example, Japanese Patent Application Laid-Open No. 2011-257082 (Patent Document 1).

特許文献１においては、冷却器を含む冷凍サイクルを構成する各種機器、送風機、冷気が通過する冷気風路は、構造的な観点から冷蔵庫の背面側に配置されており、冷気風路を流れる冷気は各貯蔵室内の奥側壁面部に形成された吹き出し口より各貯蔵室内に送風されるものである。 In Patent Document 1, various devices constituting a refrigeration cycle including a cooler, a blower, and a cold air passage through which cold air passes are arranged on the back side of the refrigerator from a structural viewpoint, and the cold air flowing through the cold air passage Is blown into each storage chamber from a blow-out port formed in the inner wall surface of each storage chamber.

例えば冷凍室の場合を考えると、奥側壁面部に冷凍室に配置される各貯蔵容器に向かって冷気が吹き出す冷気吹き出し口があり、貯蔵容器の後部（奥側）から貯蔵容器内に冷気を流入させる構成となっている。 For example, considering the case of a freezer compartment, there is a cold air outlet through which cool air blows out toward each storage container placed in the freezer compartment on the back side wall surface part, and cold air flows into the storage container from the rear (back side) of the storage container It is the composition which makes it.

各貯蔵容器には冷気が流出するための冷気流出スリットが形成されており、冷気吹き出し口から流入した冷気は貯蔵容器内の貯蔵物を冷却したあと、冷気流出スリットから貯蔵容器外に流出する。この貯蔵容器から流出した冷気は、冷凍室を構成する冷凍室側面壁と貯蔵容器の側面壁の間の空間や、冷凍室を構成する冷凍室底面壁と貯蔵容器の底面との間の空間を通り、冷凍室の奥側壁面部の下部に設置した冷気戻り開口に流入して冷却器に戻る構造となっている。 Each storage container is formed with a cool air outflow slit through which cold air flows out, and the cool air flowing in from the cold air outlet cools the stored item in the storage container and then flows out of the storage container through the cold air outflow slit. The cold air that has flowed out of the storage container passes through the space between the side wall of the freezer compartment that constitutes the freezer compartment and the side wall of the storage container, and the space between the bottom wall of the freezer compartment that constitutes the freezer compartment and the bottom face of the storage container. It has a structure that flows into the cool air return opening installed in the lower part of the back side wall surface portion of the freezer compartment and returns to the cooler.

また貯蔵容器に形成する冷気流出スリットは、冷気を貯蔵容器全体に均一に行き渡らせるために、貯蔵容器の側面壁前方部に形成するものがある。 In addition, there is a cold air outflow slit formed in the storage container, which is formed in the front portion of the side wall of the storage container in order to distribute the cold air uniformly throughout the storage container.

特開２０１１-２５７０８２号公報JP 2011-257082 A

上述したように、冷蔵室、冷凍室、野菜室を備え、冷凍室に隣接して冷蔵室や野菜室を配置する場合、温度差が大きい冷凍室への熱の移動を防止するために、冷凍室を区画する断熱仕切壁は十分に厚くして断熱性を高くする必要がある。その一方で、各貯蔵室内の収納容積を確保するために、この断熱仕切壁はできるだけ薄く設計されることが必要である。 As described above, when a refrigerator room, a vegetable room is provided and a refrigerator room or a vegetable room is arranged adjacent to the freezer room, in order to prevent heat transfer to the freezer room having a large temperature difference, The heat insulating partition wall that divides the chamber needs to be sufficiently thick to increase the heat insulating property. On the other hand, in order to secure the storage capacity in each storage chamber, the heat insulating partition wall needs to be designed as thin as possible.

また、冷凍室に配置される最下段の貯蔵容器と断熱仕切壁（冷凍室の底面壁）との間の空間は、冷凍室内の冷気が冷気戻り開口に戻るためだけではなく、冷凍室の貯蔵容器の取り付けばらつきや経時的な歪みなどで冷凍室の底面壁と接触しないように設けているものでもあるので、この空間を無くすように断熱仕切壁を形成することは難しい。 In addition, the space between the lowermost storage container and the heat insulating partition wall (the bottom wall of the freezer compartment) arranged in the freezer compartment is not only for the cool air in the freezer compartment to return to the cool air return opening, but also for storing the freezer compartment. Since it is also provided so as not to come into contact with the bottom wall of the freezer compartment due to variations in container attachment or distortion over time, it is difficult to form a heat insulating partition wall so as to eliminate this space.

このような理由から、冷凍室と野菜室を区画する断熱仕切壁はあまり厚くできず、おのずと断熱性が低くなって野菜室の熱が冷凍室へ熱伝導により移動して野菜室温度が下がってしまうことがある。一般的に野菜類は低い温度で冷却すると低温障害や鮮度の低下を招く可能性があるため、野菜室の温度は貯蔵室の中では比較的高い温度、一例として３℃〜７℃程度にしておくことが好ましいが、冷凍室と野菜室との断熱性能が悪い場合は、外気温度が低い状態では野菜室内の温度が野菜の保存に適した温度よりも低下してしまう現象がある。 For this reason, the heat insulation partition wall that separates the freezer compartment and the vegetable compartment cannot be made too thick, and the heat insulation of the vegetable compartment is naturally lowered and the vegetable compartment heat is transferred to the freezer compartment due to heat conduction and the vegetable compartment temperature is lowered. May end up. In general, vegetables are cooled at a low temperature, which may cause low-temperature damage and a decrease in freshness. Therefore, the temperature of the vegetable room should be relatively high in the storage room, for example, about 3 ° C to 7 ° C. However, when the heat insulation performance between the freezer compartment and the vegetable compartment is poor, there is a phenomenon that the temperature in the vegetable compartment falls below the temperature suitable for preservation of vegetables when the outside air temperature is low.

特に上述した間冷式冷蔵庫においては、冷凍室の貯蔵容器を冷却した冷気が貯蔵容器から流出したあとに、最下段の貯蔵容器と冷凍室の底面壁との間の空間、つまり冷凍室と野菜室を区画する断熱仕切壁の上面を通るため、断熱仕切壁の上面は冷凍室の冷凍温度帯の冷気の流れにより熱交換が促され野菜室内の温度が更に低下し易くなる傾向にある。このため、冷凍室と野菜室を区画する断熱仕切壁の壁面や野菜室の壁面に配設した電熱ヒーターに通電して野菜室の温度を上昇させる方法があるが、省エネルギー性が悪化するという問題があり、あまり好ましいものではなかった。 In particular, in the above-described cold-cooled refrigerator, after the cold air that has cooled the storage container of the freezer compartment flows out of the storage container, the space between the lowermost storage container and the bottom wall of the freezer compartment, that is, the freezer compartment and the vegetables Since it passes through the upper surface of the heat insulating partition wall that divides the chamber, the upper surface of the heat insulating partition wall tends to further decrease the temperature in the vegetable room because heat exchange is promoted by the flow of cold air in the freezing temperature zone of the freezer room. For this reason, there is a method to increase the temperature of the vegetable room by energizing the electric heaters arranged on the wall of the heat insulating partition wall and the wall of the vegetable room that divide the freezer room and the vegetable room, but the problem of worsening energy saving And was not very desirable.

本発明の目的は、冷凍室に隣接した野菜室が冷凍室の冷気によって冷却されるのを抑制することができる冷蔵庫を提供することにある。 The objective of this invention is providing the refrigerator which can suppress that the vegetable compartment adjacent to a freezer compartment is cooled with the cold air of a freezer compartment.

本発明の特徴は、貯蔵容器の底面壁と冷凍室を形成する断熱仕切壁との間の空間に冷気が流入するのを抑制する冷気遮蔽部材を設け、この冷気遮蔽部材によって貯蔵容器を冷却した冷気が断熱仕切壁と貯蔵容器の底面壁の間の空間に流入するのを抑制した、ところにある。 A feature of the present invention is that a cold air shielding member that suppresses the inflow of cold air into the space between the bottom wall of the storage container and the heat insulating partition wall that forms the freezer compartment is provided, and the storage container is cooled by the cold air shielding member. This is where the cold air is prevented from flowing into the space between the heat insulating partition wall and the bottom wall of the storage container.

本発明によれば、冷凍室の貯蔵容器から流出した戻り冷気が冷凍室と野菜室を区画する断熱仕切壁の上面を通過するのを抑制することで断熱仕切壁が冷却されづらくなり、この結果として野菜室が冷凍室の冷気によって冷却されるのを抑制することができる。尚、電熱ヒーターによって野菜室の温度を調整している場合では、電熱ヒーターの消費電力を低く抑えることができるため省エネルギー性能を向上できるものである。 According to the present invention, it is difficult to cool the heat insulating partition wall by suppressing the return cold air flowing out from the storage container of the freezer compartment from passing through the upper surface of the heat insulating partition wall that partitions the freezer compartment and the vegetable compartment. As a result, the vegetable room can be prevented from being cooled by the cold air in the freezer room. In addition, in the case where the temperature of the vegetable room is adjusted by the electric heater, the power saving performance can be improved because the power consumption of the electric heater can be kept low.

本発明が適用される冷蔵庫の正面外観図である。It is a front external view of the refrigerator to which the present invention is applied. 図１に示す冷蔵庫の縦断面を示す縦断面図である。It is a longitudinal cross-sectional view which shows the longitudinal cross-section of the refrigerator shown in FIG. 図２に示す冷蔵庫の庫内の背面内部の構成を示す正面図である。It is a front view which shows the structure inside the back surface in the store | warehouse | chamber of the refrigerator shown in FIG. 本発明の第１の実施形態になる冷凍室の断面と冷気の流れを前方からみた断面図である。It is sectional drawing which looked at the cross section of the freezer compartment which becomes the 1st Embodiment of this invention, and the flow of cold air from the front. 図４に示す冷凍室を側方から見た断面と冷気の流れを側方からみた断面図である。It is sectional drawing which looked at the cross section which looked at the freezer compartment shown in FIG. 4 from the side, and the flow of cold air from the side. 本発明の第２の実施形態になる冷凍室の断面を示す断面図である。It is sectional drawing which shows the cross section of the freezer compartment which becomes the 2nd Embodiment of this invention. 本発明の第３の実施形態になる冷凍室の断面を示す断面図である。It is sectional drawing which shows the cross section of the freezer compartment which becomes the 3rd Embodiment of this invention.

以下、本発明の実施形態について図面を用いて詳細に説明するが、本発明は以下の実施形態に限定されることなく、本発明の技術的な概念の中で種々の変形例や応用例をもその範囲に含むものである。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is also included in the range.

本発明の具体的な実施例を説明する前に、本発明が適用される間冷式冷蔵庫（以下、単に冷蔵庫という）の構成を図１乃至図３に基づいて説明する。 Before describing specific embodiments of the present invention, the configuration of an intercooled refrigerator (hereinafter simply referred to as a refrigerator) to which the present invention is applied will be described with reference to FIGS.

図１は冷蔵庫の正面外観図であり、図２は図１の縦断面を示す断面図である。尚、図２においては製氷室の断面は示されていない。 FIG. 1 is a front external view of the refrigerator, and FIG. 2 is a cross-sectional view showing a longitudinal cross section of FIG. In FIG. 2, the cross section of the ice making chamber is not shown.

図１、及び図２において、冷蔵庫１は、上方から冷蔵室２、製氷室３及び上部冷凍室４、下部冷凍室５、野菜室６を有する。ここで、製氷室３と上部冷凍室４は、冷蔵室２と下部冷凍室５との間に左右に並べて設けている。一例として、冷蔵室２はおよそ＋３℃、野菜室６はおよそ＋３℃〜＋７℃の冷蔵温度帯の貯蔵室である。また、製氷室３、上部冷凍室４及び下部冷凍室５は、およそ−１８℃の冷凍温度帯の貯蔵室である。 1 and 2, the refrigerator 1 includes a refrigerator room 2, an ice making room 3, an upper freezer room 4, a lower freezer room 5, and a vegetable room 6 from above. Here, the ice making chamber 3 and the upper freezer compartment 4 are provided side by side between the refrigerator compartment 2 and the lower freezer compartment 5. As an example, the refrigerating room 2 is a storage room having a refrigeration temperature range of about + 3 ° C., and the vegetable room 6 is a refrigerating temperature zone of about + 3 ° C. to + 7 ° C. Further, the ice making room 3, the upper freezing room 4, and the lower freezing room 5 are storage rooms in a freezing temperature zone of approximately −18 ° C.

冷蔵室２は前方側に、左右に分割された観音開き（いわゆるフレンチ型）の冷蔵室扉２ａ、２ｂを備えている。製氷室３、上部冷凍室４、下部冷凍室５、野菜室６は夫々引き出し式の製氷室扉３ａ、上部冷凍室扉４ａ、下部冷凍室扉５ａ、野菜室扉６ａを備えている。 The refrigerating room 2 is provided with a folding door (so-called French type) refrigerating room doors 2a and 2b divided into left and right sides on the front side. The ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 are each provided with a drawer type ice making room door 3a, an upper freezing room door 4a, a lower freezing room door 5a, and a vegetable room door 6a.

また、各扉の貯蔵室側の面には、各扉の外縁に沿うように磁石が内蔵されたパッキン（図示せず）を設けており、各扉の閉鎖時、鉄板で形成された冷蔵庫外箱のフランジや後述の各仕切り鉄板に密着し貯蔵室内への外気の侵入、及び貯蔵室からの冷気の漏れを抑制する構成とされている。 In addition, a packing (not shown) with magnets built in along the outer edge of each door is provided on the surface of each door on the storage room side. When each door is closed, the outside of the refrigerator formed of an iron plate is provided. It is set as the structure which closely_contact | adheres to the flange of a box and each partition iron plate mentioned later, and the penetration | invasion of the external air into a storage chamber, and the leak of the cold air from a storage chamber.

ここで、図２に示すように冷蔵庫本体１０の下部には機械室１１が形成され、この中に圧縮機１２が内蔵されている。冷却器収納室１３と機械室１１には水抜き通路１４によって連通され、凝縮水が排出出来るようになっている。 Here, as shown in FIG. 2, the machine room 11 is formed in the lower part of the refrigerator main body 10, and the compressor 12 is incorporated in this. The cooler storage chamber 13 and the machine chamber 11 are communicated with each other by a drain passage 14 so that condensed water can be discharged.

図２に示すように、冷蔵庫本体１０の庫外と庫内は、内箱と外箱との間に発泡断熱材（発泡ポリウレタン）を充填することにより形成される断熱箱体１５により隔てられている。また冷蔵庫本体１０の断熱箱体１５は複数の真空断熱材１６を実装している。冷蔵庫本体１０は、上側断熱仕切壁１７により冷蔵室２と上部冷凍室４及び製氷室３（図１参照、図２中で製氷室３は図示されていない）とが区画され、下側断熱仕切壁１８により下部冷凍室５と野菜室６とが区画されている。 As shown in FIG. 2, the outside of the refrigerator body 10 and the inside of the refrigerator are separated by a heat insulating box 15 formed by filling a foam heat insulating material (foamed polyurethane) between the inner box and the outer box. Yes. Further, the heat insulating box 15 of the refrigerator body 10 has a plurality of vacuum heat insulating materials 16 mounted thereon. The refrigerator body 10 is divided into a refrigerator compartment 2, an upper freezer compartment 4, and an ice making chamber 3 (see FIG. 1, the ice making chamber 3 is not shown in FIG. 2) by an upper heat insulating partition wall 17. A lower freezer compartment 5 and a vegetable compartment 6 are partitioned by a wall 18.

また、下部冷凍室５の上部には横仕切部を設けている。横仕切部は、製氷室３及び上部冷凍室４と下部冷凍室５とを上下方向に仕切っている。また、横仕切部の上部には、製氷室３と上部冷凍室４との間を左右方向に仕切る縦仕切部を設けている。 In addition, a horizontal partition is provided in the upper part of the lower freezer compartment 5. The horizontal partitioning part partitions the ice making room 3 and the upper freezing room 4 and the lower freezing room 5 in the vertical direction. Moreover, the vertical partition part which partitions off between the ice-making room 3 and the upper freezer compartment 4 in the left-right direction is provided in the upper part of the horizontal partition part.

横仕切部は、下側断熱仕切壁１８の前面及び左右側壁前面と共に、下部冷凍室扉５ａの貯蔵室側の面に設けたパッキン（図示せず）と接触する。製氷室扉３ａと上部冷凍室扉４ａの貯蔵室側の面に設けたパッキン（図示せず）は、横仕切部、縦仕切部、上側断熱仕切壁５１及び冷蔵庫本体１の左右側壁前面と接することで、各貯蔵室と各扉との間での冷気の移動をそれぞれ抑制している。 A horizontal partition part contacts the packing (not shown) provided in the surface at the side of the storage room of the lower freezer compartment door 5a with the front surface of the lower heat insulation partition wall 18, and the front surface of the left and right side walls. Packings (not shown) provided on the storage room side surfaces of the ice making room door 3a and the upper freezing room door 4a are in contact with the horizontal partition, the vertical partition, the upper heat insulating partition wall 51, and the front surfaces of the left and right side walls of the refrigerator body 1. Thus, the movement of cold air between each storage room and each door is suppressed.

図２に示すように、上部冷凍室４、下部冷凍室５及び野菜室６は、それぞれの貯蔵室の前方に備えられた扉４ａ、５ａ、６ａが取り付けられている。また、上部冷凍室４には上部冷凍貯蔵容器４１が収納、配置され、下部冷凍室５には上段冷凍貯蔵容器６１、下段冷凍貯蔵容器６２が収納、配置されている。更に、野菜室６には上段野菜貯蔵容器７１、下段野菜貯蔵容器７２が収納、配置されている。 As shown in FIG. 2, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 are attached with doors 4a, 5a, 6a provided in front of the respective storage compartments. The upper freezer compartment 4 houses and arranges an upper frozen storage container 41, and the lower freezer compartment 5 houses and arranges an upper frozen storage container 61 and a lower frozen storage container 62. Further, an upper vegetable storage container 71 and a lower vegetable storage container 72 are stored and arranged in the vegetable compartment 6.

そして、製氷室扉３ａ、上部冷凍室扉４ａ、下部冷凍室扉５ａ及び野菜室扉６ａは、それぞれ図示しない取手部に手を掛けて手前側に引き出すことにより、製氷貯蔵容器３ｂ（図示せず）、上部冷凍貯蔵容器４１、下段冷凍貯蔵容器６２、下段野菜貯蔵容器７２が引き出せるようになっている。 Then, the ice making room door 3a, the upper freezing room door 4a, the lower freezing room door 5a, and the vegetable room door 6a are each put on a handle portion (not shown) and pulled out to the front side, thereby making an ice making storage container 3b (not shown). ), The upper frozen storage container 41, the lower frozen storage container 62, and the lower vegetable storage container 72 can be pulled out.

詳しくは、下段冷凍貯蔵容器６２は冷凍室扉内箱に取り付けられた支持アーム５ｄに下段冷凍貯蔵容器６２の側面上部のフランジ部が懸架されており、冷凍室扉５aを引き出すと同時に下段冷凍貯蔵容器６２のみが引き出される。上段冷凍貯蔵容器６１は冷凍室５の側面壁に形成された凹凸部（図示しない）に載置されており前後方向にスライド可能になっている。 More specifically, the lower refrigerated storage container 62 has a support arm 5d attached to the box inside the freezer compartment door, and a flange portion on the upper side of the lower refrigerated storage container 62 is suspended. Only the container 62 is withdrawn. The upper frozen storage container 61 is placed on an uneven portion (not shown) formed on the side wall of the freezer compartment 5 and is slidable in the front-rear direction.

下段野菜貯蔵容器７２も同様にフランジ部が野菜室扉６ａの内箱に取り付けられた支持アーム６ｄに懸架され、上段野菜貯蔵容器７１は野菜室側面壁の凹凸部に載置されている。また、この野菜室６には断熱箱体１５に固定された電熱ヒーター６Ｃが設けられており、この電熱ヒーター６Ｃによって野菜室６の温度が冷やし過ぎにならないように、野菜の貯蔵に適した温度になるようにしている。尚、この電熱ヒーター６Ｃは必要に応じて設けられれば良いものであるが、本実施例では野菜の貯蔵がより上手く行えるように電熱ヒーター６Ｃを設けるようにしている。 Similarly, the lower vegetable storage container 72 has a flange portion suspended on a support arm 6d attached to the inner box of the vegetable compartment door 6a, and the upper vegetable storage container 71 is placed on the uneven portion of the side wall of the vegetable compartment. In addition, the vegetable room 6 is provided with an electric heater 6C fixed to the heat insulating box 15, and a temperature suitable for storing vegetables so that the temperature of the vegetable room 6 is not overcooled by the electric heater 6C. It is trying to become. The electric heater 6C may be provided if necessary, but in the present embodiment, the electric heater 6C is provided so that vegetables can be stored better.

次に本実施形態の冷蔵庫の冷却方法について説明する。冷蔵庫本体１には冷却器収納室１３が形成され、この中に冷却手段として冷却器１９を備えている。冷却器１９（一例として、フィンチューブ熱交換器）は、下部冷凍室５の背部に備えられた冷却器収納室１３内に設けられている。また、冷却器収納室１３内であって冷却器１９の上方には送風手段として送風機２０（一例として、プロペラファン）が設けられている。 Next, the cooling method of the refrigerator of this embodiment is demonstrated. A refrigerator housing chamber 13 is formed in the refrigerator main body 1, and a cooler 19 is provided therein as a cooling means. The cooler 19 (for example, a fin tube heat exchanger) is provided in a cooler storage chamber 13 provided at the back of the lower freezer compartment 5. Further, a blower 20 (a propeller fan as an example) is provided as a blowing means in the cooler storage chamber 13 and above the cooler 19.

冷却器１９で熱交換して冷やされた空気（以下、冷却器１９で熱交換した低温の空気を「冷気」と称する）は、送風機２０によって冷蔵室送風ダクト２１、冷凍室送風ダクト２２、及び図示しない製氷室送風ダクトを介して、冷蔵室２、製氷室３、上部冷凍室４、下部冷凍室５、野菜室６の各貯蔵室へそれぞれ送られる。 Air cooled by heat exchange in the cooler 19 (hereinafter, low-temperature air heat-exchanged by the cooler 19 is referred to as “cold air”) is sent by the blower 20 to the refrigerator compartment air duct 21, the freezer compartment air duct 22, and It is sent to each storage room of the refrigeration room 2, the ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 through an ice making room air duct (not shown).

各貯蔵室への送風は、冷蔵温度帯の冷蔵室２への送風量を制御する第一の送風制御手段（以下、冷蔵室ダンパー２３という）と、冷凍温度帯の冷凍室４、５への送風量を制御する第二の送風量制御手段（以下、冷凍室ダンパー２４という）とにより制御される。ちなみに、冷蔵室２、製氷室３、上部冷凍室４、下部冷凍室５、及び野菜室６への各送風ダクトは、図３に破線で示すように冷蔵庫本体１の各貯蔵室の背面側に設けられている。具体的には、冷蔵室ダンパー２３が開状態、冷凍室ダンパー２４が閉状態のときには、冷気は、冷蔵室送風ダクト２１を経て多段に設けられた吹き出し口２５から冷蔵室２に送られる。 The air to each storage room is supplied to the first air blowing control means (hereinafter referred to as the cold room damper 23) for controlling the amount of air sent to the cold room 2 in the refrigeration temperature zone, and to the freezing rooms 4 and 5 in the freezing temperature zone. It is controlled by second air flow control means (hereinafter referred to as freezer damper 24) that controls the air flow. Incidentally, the air ducts to the refrigerator compartment 2, the ice making room 3, the upper freezer room 4, the lower freezer room 5, and the vegetable room 6 are arranged on the back side of each storage room of the refrigerator body 1 as shown by broken lines in FIG. Is provided. Specifically, when the refrigerator compartment damper 23 is in the open state and the freezer compartment damper 24 is in the closed state, the cold air is sent to the refrigerator compartment 2 from the outlets 25 provided in multiple stages through the refrigerator compartment air duct 21.

また、冷蔵室２を冷却した冷気は、冷蔵室２の下部に設けられた冷蔵室戻り口２６から冷蔵室−野菜室連通ダクト２７を経て、下側断熱仕切壁１８の下部右奥側に設けた野菜室吹き出し口２８から野菜室６へ送風される。野菜室６からの戻り冷気は、下側断熱仕切壁１８の下部前方に設けられた野菜室戻りダクト入口２９から野菜室戻りダクト３０を経て、野菜室戻りダクト出口から冷却器収納室１３の下部に戻る。尚、別の構成として冷蔵室−野菜室連通ダクト２７を野菜室６へ連通せずに、図３において冷却器収納室１２の上面から見て、右側下部に戻す構成としてもよい。この場合の一例として、冷蔵室−野菜室連通ダクト２７の前方投影位置に野菜室送風ダクトを配置して、冷却器１９で熱交換した冷気を、野菜室吹き出し口２８から野菜室６へ直接送風するようになる。 The cold air that has cooled the refrigerator compartment 2 is provided on the lower right rear side of the lower heat insulating partition wall 18 from the refrigerator compartment return port 26 provided in the lower part of the refrigerator compartment 2 through the refrigerator compartment-vegetable compartment communication duct 27. The air is blown from the vegetable room outlet 28 to the vegetable room 6. The return cold air from the vegetable compartment 6 passes from the vegetable compartment return duct inlet 29 provided in front of the lower part of the lower heat insulating partition wall 18 through the vegetable compartment return duct 30 and from the vegetable compartment return duct outlet to the lower part of the cooler storage compartment 13. Return to. In addition, it is good also as a structure which returns to the lower right part seeing from the upper surface of the cooler storage chamber 12 in FIG. 3, without connecting the refrigerator compartment-vegetable compartment communication duct 27 to the vegetable compartment 6 as another structure. As an example in this case, a vegetable room air duct is arranged at the front projection position of the refrigerator compartment-vegetable room communication duct 27, and the cold air heat-exchanged by the cooler 19 is directly blown from the vegetable room outlet 28 to the vegetable room 6. To come.

図２、図３に示すように、冷却器収納室１３の前方には、各貯蔵室と冷却器収納室１２との間を仕切る仕切部材３１が設けられている。仕切部材３１には、図３にあるように上下に一対の吹き出し口３２ａ、３２ｂ、３３ａ、３３ｂが形成されており、冷凍室ダンパー２４が開状態のとき、冷却器１９で熱交換された冷気が送風機２０により図示を省略した製氷室送風ダクトや上段冷凍室送風ダクト３４を経て吹き出し口３２ａ、３２ｂからそれぞれ製氷室３、上部冷凍室４へ送風される。また、下段冷凍室送風ダクト３５を経て吹き出し口、３３ａ、３３ｂから下部冷凍室５へ送風される。尚、下部冷凍室５には必要に応じて吹き出し口を増設しても良いものである。 As shown in FIGS. 2 and 3, a partition member 31 is provided in front of the cooler storage chamber 13 to partition between the storage chambers and the cooler storage chamber 12. As shown in FIG. 3, the partition member 31 has a pair of upper and lower outlets 32 a, 32 b, 33 a, 33 b formed in the upper and lower sides. When the freezer damper 24 is in the open state, Are blown by the blower 20 to the ice making chamber 3 and the upper freezing chamber 4 from the blowout ports 32a and 32b through the ice making chamber blowing duct and the upper freezing chamber blowing duct 34 (not shown). Further, the air is blown from the outlets 33 a and 33 b to the lower freezer compartment 5 through the lower freezer compartment air duct 35. It should be noted that the lower freezer compartment 5 may be provided with additional outlets as necessary.

以上のような構成の冷蔵庫において、次に本発明の第１の実施形態について図４、図５を用いて説明する。 Next, the first embodiment of the present invention in the refrigerator configured as described above will be described with reference to FIGS.

上述したように、下部冷凍室５の上段冷凍貯蔵容器６１や下段冷凍貯蔵容器６２を冷却した冷気がこれらの貯蔵容器６１，６２から流出した後に、図２に示してある下段冷凍貯蔵容器５２と下部冷凍室５の底面壁との間の空間Ｇ、つまり下部冷凍室５と野菜室６を区画する下側断熱仕切壁１８の上面を通るため、下側断熱仕切壁１８の上面は下部冷凍室５の冷凍温度帯の冷気の流れにより熱交換が促され野菜室６内の温度が更に低下するようになる。このような、現象を回避、或いは抑制するために本実施例では以下に示す構成を採用するようにしたものである。 As described above, after the cold air that has cooled the upper refrigerated storage container 61 and the lower refrigerated storage container 62 of the lower freezer compartment 5 flows out of these storage containers 61, 62, the lower refrigerated storage container 52 shown in FIG. Since it passes through the space G between the bottom wall of the lower freezer compartment 5, that is, the upper surface of the lower heat insulating partition wall 18 that divides the lower freezer chamber 5 and the vegetable compartment 6, the upper surface of the lower heat insulating partition wall 18 is the lower freezer compartment. Heat exchange is promoted by the flow of cold air in the freezing temperature zone 5 and the temperature in the vegetable compartment 6 is further lowered. In order to avoid or suppress such a phenomenon, the present embodiment adopts the following configuration.

図４、図５において上側断熱仕切壁１７と下側断熱仕切壁１８との間に断熱側面壁６０ａ、６０ｂによって下部冷凍室５が形成されている。尚、本実施例では構成を簡単にして説明するため、製氷室３や上部冷凍室扉４を省略した構成を示している。したがって、製氷室３や上部冷凍室扉４を設ける場合は、上側断熱仕切壁１７の部分を図２に示すような構成にすれば良いものである。 4 and 5, the lower freezer compartment 5 is formed by the heat insulating side walls 60 a and 60 b between the upper heat insulating partition wall 17 and the lower heat insulating partition wall 18. In the present embodiment, in order to simplify the configuration, the configuration in which the ice making chamber 3 and the upper freezer compartment door 4 are omitted is shown. Therefore, when the ice making chamber 3 and the upper freezer compartment door 4 are provided, the upper heat insulating partition wall 17 may be configured as shown in FIG.

下部冷凍室５には上段冷凍貯蔵容器６１と下段冷凍貯蔵容器６２が重ねて収納、配置されており、下部冷凍室５の背面にある仕切部材３１に設けた冷気吹き出し口６４，６５が開口されている。冷気吹き出し口６４は上段冷凍貯蔵容器６１に冷気を供給するように上段冷凍貯蔵容器６１の上面周縁の位置と同等かそれ以上の高さ位置に開口されている。上段冷凍貯蔵容器６１の先端側（仕切部材３１とは反対側）の底部には冷気流出スリット６１ｃが形成されており、この冷気流出スリット６１ｃを介して冷気が下段冷凍貯蔵容器６２に流れ込むように構成されている。また、冷気吹き出し口６５は下段冷凍貯蔵容器６２に冷気を供給するように上段冷凍貯蔵容器６１の底面壁の下で上面周縁の位置と同等かそれ以上の高さ位置に開口されている。 In the lower freezer compartment 5, an upper freezer storage container 61 and a lower freezer storage container 62 are stored and arranged in an overlapping manner, and cold air outlets 64 and 65 provided in the partition member 31 on the back of the lower freezer compartment 5 are opened. ing. The cold air outlet 64 is opened at a height position equal to or higher than the position of the upper peripheral edge of the upper frozen storage container 61 so as to supply cold air to the upper frozen storage container 61. A cold air outflow slit 61c is formed at the bottom of the upper refrigerated storage container 61 (on the side opposite to the partition member 31), and cold air flows into the lower refrigeration storage container 62 through the cold air outflow slit 61c. It is configured. Further, the cold air outlet 65 is opened at a height position equal to or higher than the position of the upper peripheral edge under the bottom wall of the upper frozen storage container 61 so as to supply cold air to the lower frozen storage container 62.

上述したように、上段冷凍貯蔵容器６１は冷凍室５の断熱側面壁６０ａ、６０ｂに形成された凹凸部に載置されており、紙面に対して前後方向にスライド可能になっている。また、下段冷凍貯蔵容器６２は冷凍室扉５ａの内側に取り付けられた支持アーム５ｄに下段冷凍貯蔵容器６２の側面上部のフランジ部が懸架されており、冷凍室扉５aを引き出すと同時に下段冷凍貯蔵容器６２のみが引き出される構成となっている。 As described above, the upper refrigerated storage container 61 is placed on the concave and convex portions formed on the heat insulating side walls 60a and 60b of the freezer compartment 5, and is slidable in the front-rear direction with respect to the paper surface. The lower refrigerated storage container 62 has a support arm 5d attached to the inside of the freezer compartment door 5a, and a flange portion on the upper side of the lower refrigerated storage container 62 is suspended. Only the container 62 is pulled out.

上段冷凍貯蔵容器６１の側面壁６１ａ、６１ｂと下部冷凍室５の断熱側面壁６０ａ、６０ｂの間には冷気が下降して流れる隙間Ｇ１が形成され、同様に下段冷凍貯蔵容器６２の側面壁６２ａ、６２ｂと下部冷凍室５の断熱側面壁６０ａ、６０ｂの間には冷気が下降して流れる隙間Ｇ２が形成されている。ここで、下段冷凍貯蔵容器６２の側面壁６２ａ、６２ｂには冷気を隙間Ｇ２に向けて流出させる冷気流出スリット６２ｃが形成されている。 A gap G1 is formed between the side walls 61a and 61b of the upper refrigerated storage container 61 and the heat insulating side walls 60a and 60b of the lower freezer compartment 5, and the side wall 62a of the lower refrigerated storage container 62 is similarly formed. , 62b and the heat insulating side walls 60a, 60b of the lower freezer compartment 5 are formed with a gap G2 through which cool air flows down. Here, cold air outflow slits 62c are formed in the side walls 62a and 62b of the lower refrigerated storage container 62 to allow the cold air to flow out toward the gap G2.

更に、本実施例の特徴的な構成として、下段冷凍貯蔵容器６２の底面壁６２ｄの付近には冷気遮蔽機能を備える冷気遮蔽部６６が設けられている。この冷気遮蔽部６６は下部冷凍室５の断熱側面壁６０ａ、６０ｂに板状の冷気遮蔽板６６として形成されている。 Further, as a characteristic configuration of the present embodiment, a cold air shielding portion 66 having a cold air shielding function is provided in the vicinity of the bottom wall 62d of the lower frozen storage container 62. The cold air shielding portion 66 is formed as a plate-like cold air shielding plate 66 on the heat insulating side walls 60 a and 60 b of the lower freezer compartment 5.

冷気遮蔽板６６は硬質の合成樹脂部材で形成してあり、下段冷凍貯蔵容器６２の冷気流出スリット６２ｃよりも下方の位置で、下部冷凍室５の左右の断熱側面壁６０ａ、６０ｂにブッシュやねじ等の固定具６６ａにより取り付けられている。また、冷気遮蔽板６６は、先端が下段冷凍貯蔵容器６２の側面壁６２ａ、６２ｂに近接するように断熱側面壁６０ａ、６０ｂから内側に水平方向に突出しており、下部冷凍室５の開口付近（下部冷凍扉５ａが開閉する取り出し開口部）から奥行き方向に延在している。本実施例においては、奥行き方向の長さは下部冷凍室扉５ａが閉まったときの下段冷凍貯蔵容器６２が位置する背面位置までの長さとしている。 The cold air shielding plate 66 is formed of a hard synthetic resin member, and has bushes and screws on the left and right heat insulating side walls 60a and 60b of the lower freezer compartment 5 at a position below the cold air outflow slit 62c of the lower refrigeration storage container 62. It attaches with fixtures 66a, such as. Further, the cold air shielding plate 66 protrudes inward from the heat insulating side walls 60a, 60b so that the tip thereof is close to the side walls 62a, 62b of the lower frozen storage container 62, and is near the opening of the lower freezer compartment 5 ( The lower refrigerating door 5a extends in the depth direction from the opening (opening and closing opening). In the present embodiment, the length in the depth direction is the length to the back position where the lower frozen storage container 62 is located when the lower freezer compartment door 5a is closed.

好ましくは、冷気遮蔽板６６は下段冷凍貯蔵容器６２の底面壁部６２ｄ付近に位置するように固定されているのが良い。このようにすることで、隙間Ｇ１、隙間Ｇ２を流れてきた冷気を円滑に冷気戻り口６７に誘導することができる。この場合、冷気戻り口６７は仕切部材３１と下側断熱部材１８の交接部付近に開口されているので、冷気遮蔽板６６はこれに合わせてなるべく低い位置に取り付けいられるのが良い。もちろん、この場合でも冷気遮蔽板６６は下段冷凍貯蔵容器６２の側面壁６２ａ、６２ｂと対向するようにして、冷気が下側に漏れないようにすることが重要である。 Preferably, the cold air shielding plate 66 is fixed so as to be positioned in the vicinity of the bottom wall portion 62d of the lower frozen storage container 62. By doing in this way, the cold air that has flowed through the gap G1 and the gap G2 can be smoothly guided to the cold air return port 67. In this case, since the cool air return port 67 is opened near the intersection of the partition member 31 and the lower heat insulating member 18, the cool air shielding plate 66 is preferably attached to a position as low as possible. Of course, in this case as well, it is important that the cold air shielding plate 66 is opposed to the side walls 62a and 62b of the lower frozen storage container 62 so that the cold air does not leak downward.

また、本実施例では冷気遮蔽板６６の先端部分には柔軟性のある軟質部材６６ｂを使用しており、冷気遮蔽板６６と下段冷凍室貯蔵容器６２の側面壁６２ａ、６２ｂが接触したとしても、下部冷凍室扉５ａの引き出し動作時の抵抗が少なくなるようにしている。また、冷気遮蔽板６６が破損したりすることもないものである。 In the present embodiment, a flexible soft member 66b is used at the tip of the cold air shielding plate 66, and even if the cold air shielding plate 66 and the side walls 62a and 62b of the lower freezer compartment storage container 62 come into contact with each other. The resistance during the pulling-out operation of the lower freezer compartment door 5a is reduced. Further, the cold air shielding plate 66 is not damaged.

下段冷凍貯蔵容器６２の前面と冷凍室扉内壁の間に隙間がある場合は、冷気がその隙間から下段冷凍貯蔵容器６２の下方に流れないように、下段冷凍貯蔵容器の前面に位置する下部冷凍室扉５ａの下方には発泡ポリエチレンシートなどの軟質材料で形成された遮蔽部材７０を貼り付けて冷気を遮蔽しておくのが良いものである。この遮蔽部材７０は、冷気遮蔽板６６の前面端と近接して対向配置されており、冷気が下段冷凍貯蔵容器６２の底面壁部６２ｄと下側断熱仕切壁１８の上面の間の空間に侵入するのを抑制している。更に、遮蔽部材７０は図５からわかるように冷気遮蔽板６６の上側に位置するが、冷気遮蔽板６６の下側に位置するようにしても良い。 If there is a gap between the front surface of the lower refrigerated storage container 62 and the inner wall of the freezer compartment door, the lower refrigeration located on the front surface of the lower refrigerated storage container so that cold air does not flow below the lower refrigerated storage container 62 from the gap. It is preferable that a cold member is shielded by attaching a shielding member 70 made of a soft material such as a foamed polyethylene sheet below the chamber door 5a. The shielding member 70 is disposed in opposition to the front end of the cold air shielding plate 66 so that the cold air enters the space between the bottom wall portion 62d of the lower refrigerated storage container 62 and the upper surface of the lower heat insulating partition wall 18. It is restrained to do. Further, as can be seen from FIG. 5, the shielding member 70 is located above the cold air shielding plate 66, but may be located below the cold air shielding plate 66.

以上のような構成において、次に冷気の流れについて説明する。図４は本実施形態にかかる下部冷凍室の冷気の流れを前方からみた図であり、図５は側方からみた図である。 Next, the flow of cold air in the above configuration will be described. FIG. 4 is a view of the flow of cold air in the lower freezer compartment according to the present embodiment as viewed from the front, and FIG. 5 is a view as viewed from the side.

吹き出し口６４から吹き出された冷気は、上段冷凍貯蔵容器６１に流入して貯蔵容器内の貯蔵物を冷却した後、一部の冷気は上段冷凍貯蔵容器６１の側面壁６１ａ、６１ｂと下部冷凍室５の断熱側面壁６０ａ、６０ｂの間の空間Ｇ１に流出し、また一部の冷気は上段冷凍貯蔵容器６１の前面から底面かけて設けられた冷気流出スリット６１ｃより流出して下段冷凍貯蔵容器６２に上方から流入する。 The cold air blown out from the outlet 64 flows into the upper freezer storage container 61 to cool the stored items in the storage container, and then some of the cold air flows into the side walls 61a and 61b of the upper freezer storage container 61 and the lower freezer compartment. 5 flows out into the space G1 between the heat insulating side walls 60a and 60b, and a part of the cold air flows out from the cold air outlet slit 61c provided from the front surface to the bottom surface of the upper frozen storage container 61 and flows into the lower frozen storage container 62. From above.

また吹き出し口６５より吹き出された冷気は、上段冷凍貯蔵容器６１の背面壁に形成された傾斜面６１ｄに導かれて下段冷凍貯蔵容器６２の背面壁上部との隙間より貯蔵容器内に流入する。 The cold air blown out from the outlet 65 is guided to an inclined surface 61 d formed on the back wall of the upper frozen storage container 61 and flows into the storage container through a gap with the upper part of the rear wall of the lower frozen storage container 62.

下段冷凍貯蔵容器６２に流入された冷気は貯蔵容器内の貯蔵物を冷却した後、下段冷凍貯蔵容器６２の側面壁６２ａ、６２ｂの前方側に開口された冷気流出スリット６２ｃより下段冷凍貯蔵容器６２の外側に流出する。この流出した冷気は、従来の構成においては以下に述べる流路を通って冷気戻り口へと流れるものであった。 The cold air flowing into the lower refrigerated storage container 62 cools the storage in the storage container, and then the lower refrigerated storage container 62 from the cold air outflow slit 62c opened in front of the side walls 62a and 62b of the lower refrigerated storage container 62. Spills out of the outside. In the conventional configuration, the cold air that has flowed out flows through the flow path described below to the cold air return port.

つまり、下段冷凍貯蔵容器６２の外側に流出した冷気は下部冷凍室の断熱側面壁６０ａ、６０ｂと下段冷凍貯蔵容器６２の側面壁６２ａ、６２ｂの空間Ｇ、及び下部冷凍室５と野菜室６を区画する断熱仕切壁１８の上面と下段冷凍貯蔵容器６２の底面壁６２ｄとの間の空間Ｇを通って冷気戻り開口６７に戻るものであった。このように冷凍温度帯の冷気が断熱仕切壁１８の上面を流れることにより、熱交換を促し断熱仕切壁１８の温度が低下するようになる。 That is, the cold air that flows out of the lower freezing storage container 62 passes through the heat insulating side walls 60a and 60b of the lower freezing compartment and the space G of the side walls 62a and 62b of the lower freezing storage container 62, and the lower freezing compartment 5 and the vegetable compartment 6. It returned to the cold air return opening 67 through the space G between the upper surface of the partition wall 18 and the bottom wall 62d of the lower frozen storage container 62. Thus, the cold air in the refrigeration temperature zone flows on the upper surface of the heat insulating partition wall 18, thereby promoting heat exchange and lowering the temperature of the heat insulating partition wall 18.

また、送風機２０が停止して冷気が循環していないときにも、自然対流効果により下部冷凍室５の内部の低温の冷気が下方に溜まっていくため断熱仕切壁１８を冷却してしまうことがある。このため、断熱仕切壁１８の厚みが十分に厚くない場合、断熱仕切壁１８の上面が冷却されて温度が低下すると、熱伝導によって断熱仕切壁１８の下面に位置する野菜室の天井面の温度も低下していき、野菜室６の温度が低下するようになる。 Further, even when the blower 20 is stopped and the cold air is not circulated, the low temperature cold air inside the lower freezer compartment 5 accumulates downward due to the natural convection effect, so that the heat insulating partition wall 18 may be cooled. is there. For this reason, when the upper surface of the heat insulation partition wall 18 is cooled and temperature falls when the thickness of the heat insulation partition wall 18 is not thick enough, the temperature of the ceiling surface of the vegetable room located in the lower surface of the heat insulation partition wall 18 by heat conduction As the temperature decreases, the temperature of the vegetable compartment 6 decreases.

このため、野菜室６の温度を上昇させるためには、野菜室６の奥壁に内蔵された野菜室専用の電熱ヒーターを駆動することが考えられるが、野菜室６全体の温度を上昇するためには大きな容量の電熱ヒーターが必要であり、消費電力量が増大してしまうという新たな課題が発生する。 For this reason, in order to raise the temperature of the vegetable compartment 6, it is possible to drive the electric heater only for the vegetable compartment built in the back wall of the vegetable compartment 6, but to raise the temperature of the whole vegetable compartment 6 Requires a large-capacity electric heater, which causes a new problem that power consumption increases.

本実施例においては、上段冷凍貯蔵容器６１、及び下段冷凍貯蔵容器６２から流出した冷気や自然対流効果により下部冷凍室５の下方に向かって流れる冷気が、下部冷凍室５と野菜室６を区画する断熱仕切壁１８の上面まで到達しないように冷気遮蔽板６６を取り付けている。 In the present embodiment, the cold air flowing out from the upper freezing storage container 61 and the lower freezing storage container 62 and the cold air flowing toward the lower side of the lower freezing room 5 due to the natural convection effect partition the lower freezing room 5 and the vegetable room 6. The cold air shielding plate 66 is attached so as not to reach the upper surface of the heat insulating partition wall 18 to be performed.

この冷気遮蔽板６６を設置したことにより、下部冷凍室５に冷気を送風しているときに、上段冷凍貯蔵容器６１、及び下段冷凍貯蔵容器６２から流出した冷気は図４、図５に示すように、下段冷凍室貯蔵容器６２の側面壁６２ａ、６２ｂと断熱側面壁６０ａ、６０ｂを流れるが、冷気遮蔽板６６によって下降方向の流れが遮蔽され、冷気は冷気遮蔽板６６の上面を通って冷気戻り口６７に誘導されるように流れていくようになる。このため、冷気は断熱仕切壁１８と下段冷凍室貯蔵容器６２の底面壁部６２ｄとで形成される空間Ｇに回り込まず、断熱仕切壁１８が過度に冷却されるのを回避できる、或いは抑制できるようになる。 By installing this cold air shielding plate 66, when the cold air is blown into the lower freezer compartment 5, the cold air flowing out from the upper frozen storage container 61 and the lower frozen storage container 62 is as shown in FIGS. In addition, although it flows through the side walls 62 a and 62 b and the heat insulating side walls 60 a and 60 b of the lower freezer compartment storage container 62, the flow in the downward direction is shielded by the cold air shielding plate 66, and the cold air passes through the upper surface of the cold air shielding plate 66. It flows so as to be guided to the return port 67. For this reason, the cold air does not enter the space G formed by the heat insulating partition wall 18 and the bottom wall portion 62d of the lower freezer compartment storage container 62, and the heat insulating partition wall 18 can be avoided or suppressed from being excessively cooled. It becomes like this.

また送風機２０が停止している場合でも、自然対流効果により冷凍室５内部の低温の冷気が下方に流れてくるが、この冷気遮蔽板６６によって冷気の下降を遮蔽し、低温の冷気を断熱仕切壁１８と下段冷凍室貯蔵容器６２の底面壁部６２ｄとで形成される空間Ｇまで到達させることがないものである。 Even when the blower 20 is stopped, the cold air in the freezer compartment 5 flows downward due to the natural convection effect. However, the cold air shielding plate 66 shields the cool air from descending, and the cold air is insulated from the heat insulation partition. It does not reach the space G formed by the wall 18 and the bottom wall portion 62d of the lower freezer compartment storage container 62.

このように、本実施例においては断熱仕切壁１８の上面が冷凍室温度帯の冷気により冷却されるのが抑制されるので、下部冷凍室５と野菜室６とを区画する断熱仕切壁１８の厚みが十分でなくても、野菜室６の天井面の温度が従来構成に比べて低下しなくなり、外気温度が低くても野菜室６内の温度が低下しづらくなるものである。更に、本実施例のように、野菜室６の温度を上昇させるための電熱ヒーター６Ｃを備えているものにおいては、電熱ヒーター６Ｃの消費電力を下げることが可能となり省エネルギー性能を向上できるようになる。 Thus, in this embodiment, since the upper surface of the heat insulating partition wall 18 is suppressed from being cooled by the cold air in the freezer compartment temperature zone, the heat insulating partition wall 18 that partitions the lower freezer compartment 5 and the vegetable compartment 6 is used. Even if the thickness is not sufficient, the temperature of the ceiling surface of the vegetable chamber 6 does not decrease compared to the conventional configuration, and the temperature in the vegetable chamber 6 is difficult to decrease even if the outside air temperature is low. Further, as in this embodiment, in the case where the electric heater 6C for raising the temperature of the vegetable compartment 6 is provided, the power consumption of the electric heater 6C can be reduced and the energy saving performance can be improved. .

次に本発明の第２の実施形態について図６を用いて詳細に説明する。第１の実施形態では冷気遮蔽板６６は下部冷凍室５の断熱側面壁６０ａ、６０ｂに固定されていたが、本実施例では断熱仕切壁１８の上面に冷気遮蔽板６８を固定するようにしたものである。 Next, a second embodiment of the present invention will be described in detail with reference to FIG. In the first embodiment, the cold air shielding plate 66 is fixed to the heat insulating side walls 60a and 60b of the lower freezer compartment 5, but in this embodiment, the cold air shielding plate 68 is fixed to the upper surface of the heat insulating partition wall 18. Is.

図６において、本実施例の特徴的な構成として、下段冷凍貯蔵容器６２の底面壁６２ｄに対向する断熱仕切壁１８の上面には冷気遮蔽機能を備える冷気遮蔽部６８が設けられている。この冷気遮蔽部６６は断熱仕切壁１８に板状の冷気遮蔽板６８として形成されている。冷気遮蔽板６８は硬質の合成樹脂部材で形成してあり、下段冷凍貯蔵容器６２の側面壁６２ａ、６２ｂが位置する付近にブッシュやねじ等の固定具６８ａにより取り付けられている。 In FIG. 6, as a characteristic configuration of the present embodiment, a cold air shielding portion 68 having a cold air shielding function is provided on the upper surface of the heat insulating partition wall 18 facing the bottom wall 62 d of the lower refrigerated storage container 62. The cold air shielding portion 66 is formed on the heat insulating partition wall 18 as a plate-like cold air shielding plate 68. The cold air shielding plate 68 is formed of a hard synthetic resin member, and is attached by a fixing tool 68a such as a bush or a screw in the vicinity of the side walls 62a and 62b of the lower frozen storage container 62.

また、冷気遮蔽板６８は、先端が下段冷凍貯蔵容器６２の底面壁６２ｄに近接するように断熱仕切壁１８から内側に垂直方向に突出しており、下部冷凍室５の開口付近（下部冷凍扉５ａが開閉する取り出し開口部）から奥行き方向に延在している。本実施例においては、奥行き方向の長さは下部冷凍室扉５ａが閉まったときの下段冷凍貯蔵容器６２が位置する背面位置までの長さとしている。 Further, the cold air shielding plate 68 protrudes inward from the heat insulating partition wall 18 so that the tip thereof is close to the bottom wall 62d of the lower refrigerated storage container 62, and is near the opening of the lower freezer compartment 5 (lower refrigeration door 5a). Extends in the depth direction from the take-out opening that opens and closes. In the present embodiment, the length in the depth direction is the length to the back position where the lower frozen storage container 62 is located when the lower freezer compartment door 5a is closed.

好ましくは、冷気遮蔽板６８は下段冷凍貯蔵容器６２の側面壁６２ａ、６２ｂ付近に位置するように固定されているのが良い。このようにすることで、隙間Ｇ１、隙間Ｇ２を流れてきた冷気を円滑に冷気戻り口６７に誘導することができる。この場合、冷気遮蔽板６８は下段冷凍貯蔵容器６２の底面壁６２ｄと対向するようにして、断熱仕切壁１８と下段冷凍室貯蔵容器６２の底面壁部６２ｄとで形成される空間Ｇまで冷気が漏れないようにすることが重要である。 Preferably, the cold air shielding plate 68 is fixed so as to be positioned in the vicinity of the side walls 62a and 62b of the lower frozen storage container 62. By doing in this way, the cold air that has flowed through the gap G1 and the gap G2 can be smoothly guided to the cold air return port 67. In this case, the cool air shielding plate 68 is opposed to the bottom wall 62d of the lower refrigeration storage container 62 so that the cold air can reach the space G formed by the heat insulating partition wall 18 and the bottom wall 62d of the lower refrigeration chamber storage container 62. It is important not to leak.

また、本実施例では実施例１と同様に冷気遮蔽板６８の先端部分には柔軟性のある軟質部材を使用しており、冷気遮蔽板６８と下段冷凍室貯蔵容器６２の底面壁６２ｄが接触したとしても、下部冷凍室扉５ａの引き出し動作時の抵抗が少なくなるようにしていると共に、冷気遮蔽板６８が破損したりすることもないものである。 Further, in the present embodiment, a flexible soft member is used at the tip of the cold air shielding plate 68 as in the first embodiment, and the cold air shielding plate 68 and the bottom wall 62d of the lower freezer compartment storage container 62 are in contact with each other. Even so, the resistance during the drawer operation of the lower freezer compartment door 5a is reduced, and the cold air shielding plate 68 is not damaged.

また、実施例１と同様に、下段冷凍貯蔵容器６２の前面と冷凍室扉内壁の間に隙間がある場合は、冷気がその隙間から下段冷凍貯蔵容器６２の下方に流れないように、下段冷凍貯蔵容器の前面に位置する下部冷凍室扉５ａの下方には発泡ポリエチレンシートなどの軟質材料で形成された遮蔽部材７０を貼り付けて冷気を遮蔽しておくようにしても良い。 Similarly to the first embodiment, when there is a gap between the front surface of the lower refrigerated storage container 62 and the inner wall of the freezer compartment door, the lower refrigeration is performed so that cold air does not flow below the lower refrigerated storage container 62 from the gap. You may make it shield cold air by sticking the shielding member 70 formed with soft materials, such as a foamed polyethylene sheet, under the lower freezer compartment door 5a located in the front surface of a storage container.

この他に、冷気遮蔽板６８は下部断熱仕切壁１８と一体に形成されていても良いものである。このように下部断熱仕切壁１８と一体にする場合は、断熱箱体１５の内箱に形成した下部断熱仕切壁１８に下部冷凍室５側に向けて突出した冷気遮蔽突起を形成し、この部分にウレタンフォームを充填して形成することができる。この構成によっても冷気は断熱仕切壁１８と下段冷凍室貯蔵容器６２の底面壁部６２ｄとで形成される空間Ｇに回り込まず、断熱仕切壁１８が過度に冷却されるのを回避できる、或いは抑制できるようになる。 In addition, the cold air shielding plate 68 may be formed integrally with the lower heat insulating partition wall 18. Thus, when integrating with the lower heat insulation partition wall 18, the cold insulation protrusion which protruded toward the lower freezer compartment 5 side is formed in the lower heat insulation partition wall 18 formed in the inner box of the heat insulation box 15, and this part Can be filled with urethane foam. Even with this configuration, the cold air does not enter the space G formed by the heat insulating partition wall 18 and the bottom wall portion 62d of the lower freezer compartment storage container 62, and the heat insulating partition wall 18 can be avoided or suppressed from being excessively cooled. become able to.

以上述べた通り、本実施例においては上段冷凍貯蔵容器６１、及び下段冷凍貯蔵容器６２から流出した冷気や自然対流効果により下部冷凍室５の下方に向かって流れる冷気が、下部冷凍室５と野菜室６を区画する断熱仕切壁１８の上面まで到達しないように冷気遮蔽板６８を取り付けている。この冷気遮蔽板６８を設置したことにより、下部冷凍室５に冷気を送風しているときに、上段冷凍貯蔵容器６１、及び下段冷凍貯蔵容器６２から流出した冷気は下段冷凍室貯蔵容器６２の側面壁６２ａ、６２ｂと断熱側面壁６０ａ、６０ｂを流れるが、冷気遮蔽板６８によって冷気は冷気遮蔽板６８の側面を通って冷気戻り口６７に誘導されるように流れていくようになる。このため、冷気は断熱仕切壁１８と下段冷凍室貯蔵容器６２の底面壁部６２ｄとで形成される空間Ｇに回り込まず、断熱仕切壁１８が過度に冷却されるのを回避できる、或いは抑制できるようになる。また、これ以外にも実施例１と同様の作用効果をそうすることができるものである。 As described above, in this embodiment, the cold air flowing out from the upper freezing storage container 61 and the lower freezing storage container 62 and the cold air flowing downward from the lower freezing room 5 due to the natural convection effect are the lower freezing room 5 and the vegetables. A cool air shielding plate 68 is attached so as not to reach the upper surface of the heat insulating partition wall 18 that partitions the chamber 6. By installing this cold air shielding plate 68, when the cold air is blown into the lower freezer compartment 5, the cold air flowing out from the upper freezer storage container 61 and the lower freezer storage container 62 will be side surfaces of the lower freezer compartment storage container 62. Although it flows through the walls 62a and 62b and the heat insulating side walls 60a and 60b, the cool air shielding plate 68 causes the cool air to flow through the side surfaces of the cool air shielding plate 68 so as to be guided to the cool air return port 67. For this reason, the cold air does not enter the space G formed by the heat insulating partition wall 18 and the bottom wall portion 62d of the lower freezer compartment storage container 62, and the heat insulating partition wall 18 can be avoided or suppressed from being excessively cooled. It becomes like this. In addition, the same function and effect as in the first embodiment can be achieved.

次に本発明の第３の実施形態について図７を用いて詳細に説明する。第２の実施形態では冷気遮蔽板６８は下部冷凍室５の断熱仕切壁１８に固定されていたが、本実施例では下段冷凍貯蔵容器６２の側面壁部６２ａ、６２ｂを下側に延長して冷気遮蔽部６９を形成するようにしたものである。 Next, a third embodiment of the present invention will be described in detail with reference to FIG. In the second embodiment, the cold air shielding plate 68 is fixed to the heat insulating partition wall 18 of the lower freezer compartment 5, but in this embodiment, the side wall portions 62a and 62b of the lower frozen storage container 62 are extended downward. The cold air shielding portion 69 is formed.

図７において、本実施例の特徴的な構成として、下段冷凍貯蔵容器６２の側面壁部６２ａ、６２ｂは下側に延長されて冷気遮蔽部６９が一体的に形成されている。この冷気遮蔽部６９は下段冷凍貯蔵容器６２の側面壁６２ａ、６２ｂと一体に形成され、下段冷凍貯蔵容器６２が収納された状態で断熱仕切壁１８の上面と近接、或いは接触する長さに決められている。冷気遮蔽部６９は、下部冷凍室５の開口付近（下部冷凍扉５ａが開閉する取り出し開口部）から奥行き方向に延在している。本実施例においては、奥行き方向の長さは下部冷凍室扉５ａが閉まったときの下段冷凍貯蔵容器６２が位置する背面位置までの長さとしている。 In FIG. 7, as a characteristic configuration of the present embodiment, the side wall portions 62 a and 62 b of the lower refrigerated storage container 62 are extended downward to integrally form a cold air shielding portion 69. The cold air shielding portion 69 is formed integrally with the side walls 62a and 62b of the lower refrigerated storage container 62, and is determined to be close to or in contact with the upper surface of the heat insulating partition wall 18 in a state where the lower refrigerated storage container 62 is accommodated. It has been. The cold air shielding portion 69 extends in the depth direction from the vicinity of the opening of the lower freezer compartment 5 (the extraction opening that opens and closes the lower freezing door 5a). In the present embodiment, the length in the depth direction is the length to the back position where the lower frozen storage container 62 is located when the lower freezer compartment door 5a is closed.

本実施例においては、上段冷凍貯蔵容器６１、及び下段冷凍貯蔵容器６２から流出した冷気や自然対流効果により下部冷凍室５の下方に向かって流れる冷気が、下部冷凍室５と野菜室６を区画する断熱仕切壁１８の上面まで到達しないように、冷気遮蔽部６９を下段冷凍貯蔵容器６２の側面壁６２ａ、６２ｂを下側に延長して一体的に形成している。 In the present embodiment, the cold air flowing out from the upper freezing storage container 61 and the lower freezing storage container 62 and the cold air flowing toward the lower side of the lower freezing room 5 due to the natural convection effect partition the lower freezing room 5 and the vegetable room 6. The cold shielding portion 69 is integrally formed by extending the side walls 62a and 62b of the lower refrigerated storage container 62 downward so as not to reach the upper surface of the heat insulating partition wall 18 to be performed.

この冷気遮蔽部６９を形成したことにより、下部冷凍室５に冷気を送風しているときに、上段冷凍貯蔵容器６１、及び下段冷凍貯蔵容器６２から流出した冷気は下段冷凍室貯蔵容器６２の側面壁６２ａ、６２ｂと断熱側面壁６０ａ、６０ｂを流れるが、冷気遮蔽部６９によって冷気は冷気遮蔽部６９の側面を通って冷気戻り口６７に誘導されるように流れていくことになる。このため、冷気は断熱仕切壁１８と下段冷凍室貯蔵容器６２の底面壁部６２ｄとで形成される空間Ｇに回り込まず、断熱仕切壁１８が過度に冷却されるのを回避できる、或いは抑制できるようになる。また、これ以外にも実施例１と同様の作用効果を奏することができるものである。更に、冷気遮蔽部６９を下段冷凍貯蔵容器６２と一体的に同時成形できるのでコストの低減と、組み立て工数の低減を図ることができる。 By forming this cool air shielding portion 69, when the cool air is blown to the lower freezer compartment 5, the cold air flowing out from the upper freezer storage container 61 and the lower freezer storage container 62 will be side surfaces of the lower freezer compartment storage container 62. Although it flows through the walls 62a and 62b and the heat insulating side walls 60a and 60b, the cold air flows through the cold air shielding portion 69 so as to be guided to the cold air return port 67 through the side surface of the cold air shielding portion 69. For this reason, the cold air does not enter the space G formed by the heat insulating partition wall 18 and the bottom wall portion 62d of the lower freezer compartment storage container 62, and the heat insulating partition wall 18 can be avoided or suppressed from being excessively cooled. It becomes like this. In addition, the same operational effects as those of the first embodiment can be obtained. Further, since the cold air shielding portion 69 can be integrally molded integrally with the lower frozen storage container 62, the cost can be reduced and the number of assembly steps can be reduced.

以上説明したように、従来の冷蔵庫においては冷凍室の冷凍貯蔵容器を冷却した冷気がこれらの貯蔵容器から流出した後に、冷凍貯蔵容器と冷凍室の底面壁（断熱仕切壁）との間の空間、つまり冷凍室と野菜室を区画する断熱仕切壁の上面を通るため、断熱仕切壁の上面は冷凍室の冷凍温度帯の冷気の流れにより熱交換が促され野菜室内の温度が更に低下するようになる。 As described above, in the conventional refrigerator, after the cold air that has cooled the frozen storage containers in the freezing room flows out of these storage containers, the space between the frozen storage container and the bottom wall (thermal insulating partition wall) of the freezing room That is, since the upper surface of the heat insulating partition wall that divides the freezer compartment and the vegetable compartment is passed, heat exchange is promoted by the flow of cold air in the freezing temperature zone of the freezer compartment so that the temperature in the vegetable compartment further decreases. become.

これに対して、本発明では貯蔵容器の底面壁と冷凍室を形成する断熱仕切壁との間の空間に冷気が流入するのを抑制する冷気遮蔽部材を設け、この冷気遮蔽部材によって貯蔵容器を冷却した冷気が断熱仕切壁と貯蔵容器の底面壁の間の空間に流入するのを抑制するような構成を採用した。 On the other hand, in the present invention, a cold air shielding member that suppresses the inflow of cold air into the space between the bottom wall of the storage container and the heat insulating partition wall that forms the freezer compartment is provided. A configuration was adopted in which the cooled cold air is prevented from flowing into the space between the heat insulating partition wall and the bottom wall of the storage container.

このような構成によって、冷凍室の貯蔵容器から流出した戻り冷気が冷凍室と野菜室を区画する断熱仕切壁の上面を通過するのを抑制することで断熱仕切壁が冷却されづらくなり、この結果として野菜室が冷凍室の冷気によって冷却されるのを抑制することができる。尚、電熱ヒーターによって野菜室の温度を調整している場合では、電熱ヒーターの消費電力を低く抑えることができるため省エネルギー性能を向上できるものである。 With such a configuration, it is difficult to cool the heat insulating partition wall by suppressing the return cold air flowing out from the storage container of the freezer room from passing through the upper surface of the heat insulating partition wall that partitions the freezer room and the vegetable room. As a result, the vegetable room can be prevented from being cooled by the cold air in the freezer room. In addition, in the case where the temperature of the vegetable room is adjusted by the electric heater, the power saving performance can be improved because the power consumption of the electric heater can be kept low.

１０…冷蔵庫本体、２…冷蔵室、３…製氷室、４…上部冷凍室、５…下部冷凍室、６…野菜室、１９…冷却器、１２…冷却器収納室、１８…断熱仕切壁、２０…送風機、６０ａ、６０ｂ…断熱側面壁、６１…上段冷凍貯蔵容器、６２…下段冷凍貯蔵容器、６２ａ、６２ｂ…側面壁部、６６，６８，６８…冷気遮蔽部。 DESCRIPTION OF SYMBOLS 10 ... Refrigerator main body, 2 ... Refrigeration room, 3 ... Ice making room, 4 ... Upper freezing room, 5 ... Lower freezing room, 6 ... Vegetable room, 19 ... Cooler, 12 ... Cooler storage room, 18 ... Thermal insulation partition wall, DESCRIPTION OF SYMBOLS 20 ... Blower, 60a, 60b ... Heat insulation side wall, 61 ... Upper stage frozen storage container, 62 ... Lower stage frozen storage container, 62a, 62b ... Side wall part, 66, 68, 68 ... Cold air shielding part.

Claims

断熱箱体に少なくとも冷気が供給される冷凍室、断熱仕切壁、及び冷気が供給される野菜室の順で配置すると共に、前記冷凍室に冷凍貯蔵容器を収納してなる冷蔵庫において、
前記冷凍貯蔵容器の底面壁と前記冷凍室を形成する前記断熱仕切壁との間に形成される空間に前記冷凍室に供給された冷気が流入するのを抑制する冷気遮蔽部材を設け、前前記冷気遮蔽部材によって前記冷凍貯蔵容器を冷却した冷気を冷気戻り口に誘導することを特徴とする冷蔵庫。 In the refrigerator formed by storing a frozen storage container in the freezer compartment in the order of the freezer compartment to which at least cold air is supplied to the heat insulation box, the insulating partition wall, and the vegetable compartment to which the cold air is supplied,
A cold air shielding member is provided to suppress the flow of cold air supplied to the freezer compartment into a space formed between the bottom wall of the frozen storage container and the heat insulating partition wall forming the freezer compartment, A refrigerator characterized in that cold air that has cooled the frozen storage container is guided to a cold air return port by a cold air shielding member.

請求項１に記載の冷蔵庫において、
前記凍貯蔵容器の底面壁と、この底面壁に対向する前記冷凍室の断熱仕切壁の間の隙間を塞ぐように、前記冷凍貯蔵容器の側面壁から前記冷凍室の断熱仕切壁に向けて延びる前記冷気遮蔽部材を前記冷凍貯蔵容器と一体に形成し、更に前記冷凍貯蔵容器と一体に形成された前記冷気遮蔽部材を前記冷凍室の奥側方向に向けて延在させたことを特徴とする冷蔵庫。 The refrigerator according to claim 1,
It extends from the side wall of the freezer storage container toward the heat insulating partition wall of the freezer compartment so as to close a gap between the bottom wall of the frozen storage container and the heat insulating partition wall of the freezer compartment facing the bottom wall. The cold air shielding member is formed integrally with the frozen storage container, and the cold air shielding member formed integrally with the frozen storage container is extended toward the back side of the freezer compartment. refrigerator.

請求項１に記載の冷蔵庫において、
前記冷凍貯蔵容器の側面壁と、この側面壁に対向する前記冷凍室の断熱側面壁の間の隙間を塞ぐように、前記冷気遮蔽部材を前記冷凍室の奥側方向に向けて延在させたことを特徴とする冷蔵庫。 The refrigerator according to claim 1,
The cold air shielding member is extended toward the back side of the freezer compartment so as to close a gap between the side wall of the frozen storage container and the heat insulating side wall of the freezer compartment facing the side wall. A refrigerator characterized by that.

請求項１に記載の冷蔵庫において、
前記冷凍貯蔵容器の底面壁と、この底面壁に対向する前記冷凍室の断熱仕切壁の間の隙間を塞ぐように、前記冷気遮蔽部材を前記冷凍室の奥側方向に向けて延在させたことを特徴とする冷蔵庫。 The refrigerator according to claim 1,
The cold air shielding member is extended toward the back side of the freezer compartment so as to close a gap between the bottom wall of the frozen storage container and the heat insulating partition wall of the freezer compartment facing the bottom wall. A refrigerator characterized by that.

請求項３或いは請求項４に記載の冷蔵庫において、
前記冷気遮蔽部材が前記冷凍貯蔵容器の側面壁と前記側面壁に対向する前記冷凍室の断熱側面壁の間の隙間を塞ぐ場合は、前記冷気遮蔽部材は前記冷凍室の前記断熱側面壁に取り付けられ、
前記冷気遮蔽部材が前記冷凍貯蔵容器の底面壁と前記底面壁に対向する前記冷凍室の断熱仕切壁の間の隙間を塞ぐ場合は、前記冷気遮蔽部材は前記断熱仕切壁に取り付けられていることを特徴とする冷蔵庫。 In the refrigerator according to claim 3 or claim 4,
When the cold air shielding member closes a gap between the side wall of the frozen storage container and the heat insulating side wall of the freezing chamber facing the side wall, the cold air shielding member is attached to the heat insulating side wall of the freezing chamber And
When the cold air shielding member closes a gap between the bottom wall of the frozen storage container and the heat insulating partition wall of the freezer compartment facing the bottom wall, the cold air shielding member is attached to the heat insulating partition wall. A refrigerator characterized by.