JP4848332B2

JP4848332B2 - refrigerator

Info

Publication number: JP4848332B2
Application number: JP2007232152A
Authority: JP
Inventors: 良二河井; 昭義大平; 展昭荒川; 和文笹村; 陽平門傳
Original assignee: Hitachi Appliances Inc
Current assignee: Hitachi Appliances Inc
Priority date: 2007-09-07
Filing date: 2007-09-07
Publication date: 2011-12-28
Anticipated expiration: 2027-09-07
Also published as: JP2009063245A

Description

本発明は冷蔵庫に関する。 The present invention relates to a refrigerator.

従来の冷蔵庫としては、例えば、特開２００１−２２１５５４号公報（特許文献１），特許第３７３００９５号公報（特許文献２）に示されているものがある。 Examples of conventional refrigerators include those disclosed in Japanese Patent Application Laid-Open No. 2001-221554 (Patent Document 1) and Japanese Patent No. 3730095 (Patent Document 2).

一般的に、冷蔵庫の貯蔵室の背面側中央部や、側面側付近には冷気が届き難く、貯蔵室内部に温度分布が付き易い傾向にあった。それらを解決するために特開２００１−２２１５５４号公報に記載の冷蔵庫では、冷却器と連通した冷気風路に設けた吐出口から冷気を貯蔵室に吐出し、また吐出口に設けた指向性吐出部により、前記冷気風路の一部をなす部材の表面（金属パネル）に沿って冷気を吐出している。 In general, it is difficult for cold air to reach the central part on the back side of the storage room of the refrigerator or in the vicinity of the side surface, and the temperature distribution tends to be easily attached to the inside of the storage room. In order to solve these problems, in the refrigerator described in Japanese Patent Application Laid-Open No. 2001-221554, cold air is discharged from a discharge port provided in a cold air passage communicating with a cooler into a storage chamber, and a directional discharge provided in the discharge port. The portion discharges cold air along the surface (metal panel) of a member that forms part of the cold air path.

特許第３７３００９５号公報に記載の冷蔵庫は、貯蔵室の背面部にダクト形成部材を取り付け、ダクト前面部に設けた吐出口と、ダクトの左右両側に設けた吐出口に対向した背面ダクト側面と平行な平面部を、貯蔵室の左右の壁面から離間してダクト形成部材に設け、前記ダクト吐出口から左右に放出された冷気は、前記平面部により貯蔵室前方に向かって流れるようになっている。 The refrigerator described in Japanese Patent No. 3730095 has a duct forming member attached to the back surface of the storage room, and is parallel to the discharge port provided on the front surface of the duct and the side surface of the back duct facing the discharge ports provided on the left and right sides of the duct. The flat portion is provided on the duct forming member so as to be separated from the left and right wall surfaces of the storage chamber, and the cool air discharged to the left and right from the duct discharge port flows toward the front of the storage chamber by the flat portion. .

特開２００１−２２１５５４号公報JP 2001-221554 A 特許第３７３００９５号公報Japanese Patent No. 3730095

特開２００１−２２１５５４号公報記載の冷蔵庫では、冷気風路吐出口に設けた指向性吐出部により、冷蔵室の背壁の中央や側壁近くに冷気が行き渡るようになるため、冷蔵室内の温度分布が均一になり、また冷蔵室の背壁に結露した水滴を指向性吐出口から吐出される冷気の作用によって速やかに解消されることが記載されている。また、特許第３７３００９５号公報では、背面ダクト吐出口から左右に放出された冷気は、背面ダクト側面と平行な平面部に衝突して冷蔵室の前方に向かって流れることが記載れている。 In the refrigerator described in Japanese Patent Application Laid-Open No. 2001-221554, the directional discharge unit provided at the cold air duct discharge port allows cold air to be distributed near the center or near the side wall of the cold room. It is described that water droplets condensed on the back wall of the refrigerator compartment are quickly eliminated by the action of cold air discharged from the directional discharge port. Japanese Patent No. 3730095 describes that the cold air discharged from the left and right sides of the rear duct discharge port collides with a flat portion parallel to the rear duct side surface and flows toward the front of the refrigerator compartment.

しかしながら、このような従来型冷蔵庫では、冷蔵室の背面幅に対して比較的幅が狭い冷気ダクトを冷蔵室の中央に配設した場合、例えば、特開２００１−２２１５５４号公報記載の冷蔵庫のように、冷気を冷蔵室背面に沿って流すようにすると、冷蔵室背面において大きな熱損失が生じてしまい、省エネ性が悪化するという問題があった。また、特許第３７３００９５号公報に記載の冷蔵庫のように、冷気ダクトの吐出口から吐出される冷気を、前方に指向させて吐出するようにすると、冷蔵室内空間の冷気ダクト前方の領域が特に冷却されることになるため、冷蔵室内における温度ムラが大きくなり、食品の設置場所によって保存性能が異なるという問題があった。 However, in such a conventional refrigerator, when a cold air duct having a relatively narrow width with respect to the rear width of the refrigerator compartment is arranged in the center of the refrigerator compartment, for example, as in the refrigerator described in Japanese Patent Application Laid-Open No. 2001-221554. In addition, if cold air is caused to flow along the back of the refrigerator compartment, a large heat loss occurs on the back of the refrigerator compartment, resulting in a problem that energy saving performance deteriorates. Further, as in the refrigerator described in Japanese Patent No. 3730095, when the cold air discharged from the discharge port of the cold air duct is directed forward and discharged, the area in front of the cold air duct in the refrigerated room space is particularly cooled. Therefore, there is a problem that the temperature unevenness in the refrigerated room increases, and the storage performance varies depending on the place where the food is installed.

本発明は上記の従来の問題点に鑑みてなされたものであり、冷蔵室における熱損失をおさえることにより省エネ性に優れ、且つ、冷蔵室内の温度ムラを抑えた冷蔵庫を提供することを目的とする。 The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a refrigerator that is excellent in energy saving by suppressing heat loss in the refrigerator compartment and that suppresses temperature unevenness in the refrigerator compartment. To do.

上記目的を達成するために、本発明の請求項１に記載の発明は、内箱と外箱の中に発泡断熱材が充填され、冷蔵室と該冷蔵室の下方に冷凍室や野菜室を有し、圧縮機と、凝縮器と、放熱パイプと、冷却器を少なくとも有する冷凍サイクルが構成され、前記冷蔵室内には中央付近に前記冷却器からの冷気を前記冷蔵室に吐出させる吐出口を有する冷気ダクトを有する冷蔵庫において、前記冷気ダクトの前記吐出口には、前記冷蔵室内へ斜め方向に冷気を吐出する冷気指向手段を備え、該冷気指向手段は、前記吐出口が形成された前記冷気ダクトの左右の側壁と、該側壁と対向して設けられて前記吐出口から吐出した冷気を斜めに変更させる傾斜部を有するリブ状部材と、を有し、前記冷気ダクトの左右の側壁は、前記冷蔵室を正面から見た場合に、前記側壁の庫内背壁から手前側になるに従って内側に第一の角度θ１で傾斜して第一段階の冷気指向手段として、前記リブ状部材の前記冷気が当たる傾斜部は、前記冷蔵庫を正面から見た場合に、前記リブ状部材の庫内背壁から手前側になるに従って外側に第二の角度θ２で傾斜して第二段階の冷気指向手段として、前記第一の角度θ１よりも前記第二の角度θ２が大きく、前記第一段階の冷気指向手段で庫内背壁から第一の指向角度α１で吐出した冷気を、前記第二段階の冷気指向手段で前記第一の指向角度α１より大きい第二の指向角度α２に指向して前記冷蔵室に吐出させることを特徴とする冷蔵庫にある。 In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is characterized in that an inner box and an outer box are filled with foam heat insulating material, and a freezer room and a vegetable room are provided under the refrigerator room and the refrigerator room. A refrigeration cycle having at least a compressor, a condenser, a heat radiating pipe, and a cooler, and a discharge port for discharging cool air from the cooler to the refrigerating chamber in the vicinity of the center in the refrigerating chamber. In the refrigerator having the cold air duct, the discharge port of the cold air duct includes cold air directing means for discharging cold air obliquely into the refrigerator compartment, and the cold air directing means includes the cold air in which the discharge port is formed. Left and right side walls of the duct, and rib-shaped members that are provided opposite to the side walls and have inclined portions that obliquely change the cold air discharged from the discharge ports, and the left and right side walls of the cold air duct are When the refrigerator compartment is viewed from the front As the first stage cold air directing means that inclines at the first angle θ1 as it comes to the near side from the inner back wall of the side wall, the inclined portion where the cold air of the rib-like member hits the refrigerator When viewed from the front, as the second-stage cold air directing means tilts outward at a second angle θ2 as it comes to the near side from the inner back wall of the rib-like member, it is more than the first angle θ1. The second angle θ2 is large, and the cold air discharged at the first directivity angle α1 from the back wall of the cabinet by the first stage cold air directing means is converted into the first directivity angle by the second stage cold air directing means. α1 directed to a larger second directional angle α2 in the refrigerator, wherein Rukoto discharged to the refrigerating chamber.

この構成によれば、冷蔵室背面における熱損失を抑えられ、また、冷蔵室内の温度ムラを抑えることができる。 According to this configuration, heat loss at the back of the refrigerator compartment can be suppressed, and temperature unevenness in the refrigerator compartment can be suppressed.

この構成によれば、吐出した冷気を斜めに変更することができる。 According to this configuration, the discharged cool air can be changed obliquely.

又、本発明の請求項２に記載の発明は、請求項１において、前記リブ状部材の庫内背壁からの高さは、前記吐出口の前縁部の前記庫内背壁からの高さと同じか、それ以上の高さに形成していることを特徴とする冷蔵庫にある。 In addition, the invention according to claim 2 of the present invention is the invention according to claim 1 , wherein the height of the rib-like member from the back wall in the warehouse is the height of the front edge portion of the discharge port from the back wall in the warehouse. The refrigerator has a height equal to or higher than that.

この構成によれば、冷気を冷蔵室斜め前方に指向させることができる。 According to this configuration, the cool air can be directed obliquely forward in the refrigerator compartment.

又、本発明の請求項３に記載の発明は、請求項１において、前記リブ状部材の前記冷気ダクトと反対側には、パネル状高熱伝導部材を配設したことを特徴とする冷蔵庫にある。 According to a third aspect of the present invention, there is provided a refrigerator according to the first aspect , wherein a panel-like high heat conduction member is disposed on the opposite side of the rib-like member to the cold air duct. .

この構成によれば、冷気が直接届かない冷蔵室背面近傍の冷却を補助でき、冷蔵室内の温度ムラを抑えることができる。 According to this configuration, it is possible to assist cooling in the vicinity of the back of the refrigerating room where the cold air does not reach directly, and to suppress temperature unevenness in the refrigerating room.

又、本発明の請求項４に記載の発明は、請求項１において、前記吐出口よりも前記庫内背壁側に、前記冷気ダクトの左右の側壁と前記リブ状部材の間に形成される空間を設けたことを特徴とする冷蔵庫にある。 The invention of claim 4 of the present invention, in claim 1, to the discharge the chamber in the back wall side than the opening is formed between the left and right side walls and the rib-like member of said cool air duct It is in the refrigerator characterized by providing a space.

この構成によれば、食品くず等が風路を閉塞することによって冷却性能が低下する事態が生じ難い信頼性の高い冷蔵庫とすることができる。 According to this structure, it can be set as the highly reliable refrigerator which cannot produce the situation where cooling performance falls by food waste etc. obstruct | occluding an air path.

又、本発明の請求項５に記載の発明は、請求項１において、前記冷気ダクトの前面にはスリット状の冷気吐出口を設けたことを特徴とする冷蔵庫にある。 According to a fifth aspect of the present invention, there is provided a refrigerator according to the first aspect, wherein a slit-shaped cold air discharge port is provided in front of the cold air duct.

この構成によれば、冷気ダクト前方の領域にも冷気が行き届くため、冷蔵室内の温度ムラをより小さく抑えることができる。 According to this configuration, since the cold air reaches the area in front of the cold air duct, the temperature unevenness in the refrigerator compartment can be further reduced.

又、本発明の請求項６に記載の発明は、請求項１において、前記冷蔵室の庫内壁に冷気ダクトを設けたことを特徴とする冷蔵庫にある。 According to a sixth aspect of the present invention, there is provided a refrigerator according to the first aspect, wherein a cold air duct is provided on the inner wall of the refrigerator compartment.

この構成によれば、冷気ダクトからの熱損失を抑制することができる。 According to this configuration, heat loss from the cold air duct can be suppressed.

又、本発明の請求項７に記載の発明は、請求項１において、冷蔵庫本体の左右側面の断熱壁内に真空断熱材を配設したことを特徴とする冷蔵庫にある。 According to a seventh aspect of the present invention, there is provided a refrigerator according to the first aspect, wherein a vacuum heat insulating material is disposed in the heat insulating walls on the left and right side surfaces of the refrigerator main body.

この構成によれば、特に冷気ダクトから冷蔵室斜め前方に向けて吐出される低温冷気が直接到達する冷蔵室の側面の熱損失を低減できる。 According to this structure, the heat loss of the side surface of the refrigerator compartment which the low temperature cold air discharged especially from the cold air duct toward diagonally forward of the refrigerator compartment can be reduced.

又、本発明の請求項８に記載の発明は、請求項１において、冷蔵庫本体の背面の断熱壁内に真空断熱材を配設したことを特徴とする冷蔵庫にある。 The invention according to claim 8 of the present invention is the refrigerator according to claim 1, wherein a vacuum heat insulating material is disposed in the heat insulating wall on the back surface of the refrigerator main body.

この構成によれば、特に低温冷気が通る冷気ダクトの熱損失を効果的に低減できる。 According to this configuration, it is possible to effectively reduce the heat loss of the cold air duct through which low temperature cold air passes.

又、本発明の請求項９に記載の発明は、請求項１において、前記冷蔵庫本体の角部に前記放熱パイプを備え、真空断熱材を前記放熱パイプと離間して配設したことを特徴とする冷蔵庫にある。 The invention according to claim 9 of the present invention is characterized in that, in claim 1, the heat sink pipe is provided at a corner of the refrigerator main body, and a vacuum heat insulating material is disposed apart from the heat sink pipe. In the refrigerator.

この構成によれば、放熱パイプ配設位置がずれて真空断熱材と接触することにより、真空断熱材の外包材を介して放熱パイプの熱が庫内に侵入する量が増加する事態を回避することができる。 According to this structure, the situation where the amount of heat entering the heat-dissipating pipe through the outer packaging material of the vacuum heat-insulating material increases due to the displacement of the heat-dissipating pipe arrangement position and contact with the vacuum heat-insulating material is avoided. be able to.

又、本発明の請求項１０に記載の発明は、請求項９において、前記真空断熱材には熱溶着部である縁部を有し、前記縁部を庫内側に折り曲げた状態で前記外箱内面に配設したことを特徴とする冷蔵庫にある。

The invention of claim 1 0 of the present invention, in claim 9, comprising the edge as the vacuum heat insulating material is heat-welded portion, the outer in a folded state said edges compartment inside The refrigerator is arranged on the inner surface of the box.

この構成によれば、発泡断熱材発泡時の押付圧力により、冷蔵庫外表面に凹凸が生じ外観を損なうことが防止される。 According to this configuration, the pressing pressure at the time of foaming the foamed heat insulating material prevents the outer surface of the refrigerator from being uneven and impairing the appearance.

以上のような本発明によって、省エネ性に優れ、且つ、冷蔵室内の温度ムラを抑えた冷蔵庫を提供することができる。 According to the present invention as described above, it is possible to provide a refrigerator that is excellent in energy saving and suppresses temperature unevenness in the refrigerator compartment.

本発明の実施の形態を、図１〜図９を参照しながら説明する。なお、以下の説明では、同一機能部品については同一符号を付して重複説明を省略する。 Embodiments of the present invention will be described with reference to FIGS. In the following description, the same functional parts are denoted by the same reference numerals, and redundant description is omitted.

図１は本実施例の冷蔵庫を正面から見た図である。図１に示すように、冷蔵庫１は、上方から、冷蔵室２，製氷室３，上段冷凍室４，下段冷凍室５，野菜室６から構成される。また、冷蔵室２は前方に左右に分割された回転式の扉２ａ，２ａ′を、製氷室３，上段冷凍室４，下段冷凍室５，野菜室６は、それぞれ引き出し式の扉３ａ，４ａ，５ａ，６ａを備えている。 FIG. 1 is a front view of the refrigerator of this embodiment. As shown in FIG. 1, 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. The refrigerator compartment 2 has rotary doors 2a and 2a 'divided forward and left, and the ice making compartment 3, the upper freezer compartment 4, the lower freezer compartment 5 and the vegetable compartment 6 have drawer doors 3a and 4a, respectively. , 5a, 6a.

図２は、本実施例の冷蔵庫の庫内の構成を表す図である。図２に示すように、冷蔵庫１の庫外と庫内は、内箱５１と外箱５２間に発泡断熱材５３（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１０により隔てられている。 FIG. 2 is a diagram illustrating a configuration inside the refrigerator of the present embodiment. As shown in FIG. 2, the outside and the inside of the refrigerator 1 are separated by a heat insulating box 10 formed by filling a foam heat insulating material 53 (foamed polyurethane) between the inner box 51 and the outer box 52. Yes.

庫内は、断熱仕切壁２８により冷蔵室２と、上段冷凍室４及び製氷室３（図２中に図示しない）が隔てられ、断熱仕切壁２９により、下段冷凍室５と野菜室６が隔てられている。冷蔵室２の回転式の扉２ａには複数の扉ポケット３２が備えられている。また、冷蔵室２は複数の棚３６ａ〜３６ｄにより複数の貯蔵スペースに区画されている。棚３６ａ〜３６ｃはユーザーが設置高さを変更することができる。上段冷凍室４，下段冷凍室５及び野菜室６は、それぞれの室の前方に備えられた引き出し式の扉４ａ，５ａ，６ａに、それぞれ収納容器４ｂ，５ｂ，６ｂが備えられている。図１に示す製氷室３も同様に、引き出し式の扉３ａに、図示しない収納容器が備えられている。 The refrigerator compartment 2 separates the refrigerator compartment 2 from the upper freezer compartment 4 and the ice making chamber 3 (not shown in FIG. 2), and the insulated compartment wall 29 separates the lower freezer compartment 5 from the vegetable compartment 6. It has been. The rotary door 2 a of the refrigerator compartment 2 is provided with a plurality of door pockets 32. The refrigerator compartment 2 is divided into a plurality of storage spaces by a plurality of shelves 36a to 36d. The installation height of the shelves 36a to 36c can be changed by the user. The upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 are provided with storage containers 4b, 5b, and 6b on drawer-type doors 4a, 5a, and 6a provided in front of the respective compartments. Similarly, the ice making chamber 3 shown in FIG. 1 is provided with a storage container (not shown) in a drawer-type door 3a.

冷却器７は下段冷凍室５の略背部に備えられた冷却器収納室８内に備えられており、冷却器７の上方に備えられた庫内送風ファン９により冷却器７で熱交換した空気（本明細書中においては、熱交換した低温空気を冷気と称する）が各室へ送られる。各室への送風はダンパ２０の開閉により制御される。ダンパ２０が閉状態のときには、冷気は、上段冷凍室冷気ダクト１２，下段冷凍室冷気ダクト１３、及び図示しない製氷室冷気ダクトを介して、上段冷凍室４，下段冷凍室５，製氷室３に送られる。ダンパ２０が開状態のときには、冷気は、製氷室３，上段冷凍室４，下段冷凍室５へ送られると同時に、冷蔵室冷気ダクト１１、及び図示しない野菜室冷気ダクトを介して、冷蔵室２、及び野菜室６に送られる。したがって、冷蔵室２を冷却するために送られる冷気は、製氷室３，上段冷凍室４，下段冷凍室５へ送られる冷気と同程度の温度（−２０℃〜−２５℃程度）となる。 The cooler 7 is provided in a cooler storage chamber 8 provided substantially at the back of the lower freezer compartment 5, and air that has been heat-exchanged by the cooler 7 by an internal blower fan 9 provided above the cooler 7. (In this specification, heat-exchanged low-temperature air is referred to as cold air) is sent to each chamber. Air blowing to each chamber is controlled by opening and closing the damper 20. When the damper 20 is in the closed state, the cold air enters the upper freezer compartment 4, the lower freezer compartment 5, and the ice compartment 3 via the upper freezer compartment cold air duct 12, the lower freezer compartment cold air duct 13, and an ice making compartment cold air duct (not shown). Sent. When the damper 20 is in the open state, the cold air is sent to the ice making room 3, the upper freezer room 4, and the lower freezer room 5, and at the same time, the refrigerating room 2 through the refrigerating room cold air duct 11 and the vegetable room cold air duct (not shown). And to the vegetable room 6. Therefore, the cold air sent to cool the refrigerator compartment 2 has the same temperature (about −20 ° C. to −25 ° C.) as the cold air sent to the ice making room 3, the upper freezer room 4, and the lower freezer room 5.

また、断熱箱体１０の下部背面側には、機械室１９が備えられている。機械室１９には、圧縮機２４及び図２中に図示しない凝縮器が収納されており、図示しない庫外送風ファンにより通風される。 A machine room 19 is provided on the lower back side of the heat insulating box 10. In the machine room 19, a compressor 24 and a condenser (not shown in FIG. 2) are housed, and are ventilated by a fan outside the box (not shown).

冷却器７に付着した霜は、除霜ヒータ２２により定期的に除霜される。除霜によって生じた除霜水は冷却器収納室８の下部に備えられた樋２３に流入した後に、排水管２７を介して蒸発皿２１に達し、蒸発する。 The frost adhering to the cooler 7 is periodically defrosted by the defrost heater 22. The defrosted water generated by the defrosting flows into the eaves 23 provided at the lower part of the cooler storage chamber 8, then reaches the evaporating dish 21 through the drain pipe 27 and evaporates.

電気品を搭載した基板３１は、冷蔵庫１の天井壁背面側に設置されている。また、冷蔵庫１は複数の真空断熱材２５を実装している。 The substrate 31 on which the electrical product is mounted is installed on the back side of the ceiling wall of the refrigerator 1. The refrigerator 1 has a plurality of vacuum heat insulating materials 25 mounted thereon.

図３は本実施例の冷蔵庫の冷凍サイクルの配管を透視した図である。図３に示すように、冷蔵庫１の冷凍サイクルは、圧縮機２４と、凝縮器５５と、冷蔵庫１の断熱壁内に埋設される放熱パイプ５６と、絞り５７（キャピラリチューブ）と、冷却器７とを冷媒管で連結して構成されている。冷媒はイソブタンである。 FIG. 3 is a perspective view of the piping of the refrigeration cycle of the refrigerator of this embodiment. As shown in FIG. 3, the refrigeration cycle of the refrigerator 1 includes a compressor 24, a condenser 55, a heat radiating pipe 56 embedded in the heat insulating wall of the refrigerator 1, a throttle 57 (capillary tube), and a cooler 7. Are connected by a refrigerant pipe. The refrigerant is isobutane.

図４は本実施例の冷蔵庫の冷蔵室の扉を開けた状態を正面から見た図である。図４に示すように、幅Ｌ１（本実施例の冷蔵庫ではＬ１＝５００mm）の冷蔵室２背面の中央には、Ｌ１に対して幅が１／３以下の幅Ｌ２（本実施例の冷蔵庫ではＬ２＝７０mm）の冷蔵室冷気ダクト１１が備えられている。冷蔵室冷気ダクト１１の側面には側面吐出口３３が複数備えられている。また、冷蔵室冷気ダクト１１の前面には側面吐出口３３に比べて開口面積の小さい前面吐出口３４が複数備えられている。冷蔵室冷気ダクト１１の側面に対向する位置には上下に延伸するリブ６１が設けられている。なお、側面吐出口３３及びリブ６１近傍の詳細形状については後述する。冷蔵室２の背面の冷蔵室冷気ダクト１１の左右両側には、高熱伝導性の冷却パネル３５（アルミニウムパネル）が備えられている。また、棚３６ｃと棚３６ｄ間の貯蔵スペースの背部には温度センサ８０が備えられており、冷蔵室２内の温度を検知している。 FIG. 4 is a front view showing a state in which the door of the refrigerator compartment of the refrigerator of this embodiment is opened. As shown in FIG. 4, in the center of the back of the refrigerator compartment 2 having a width L1 (L1 = 500 mm in the refrigerator of the present embodiment), a width L2 having a width of 1/3 or less with respect to L1 (in the refrigerator of the present embodiment) L2 = 70 mm) refrigerator compartment cold air duct 11 is provided. A plurality of side surface discharge ports 33 are provided on the side surface of the refrigerator compartment cool air duct 11. In addition, a plurality of front discharge ports 34 having a smaller opening area than the side discharge ports 33 are provided on the front surface of the cold room cool air duct 11. A rib 61 extending vertically is provided at a position facing the side surface of the cold room cold air duct 11. The detailed shape near the side discharge port 33 and the rib 61 will be described later. On the left and right sides of the refrigeration chamber cool air duct 11 on the back side of the refrigeration chamber 2, high thermal conductivity cooling panels 35 (aluminum panels) are provided. In addition, a temperature sensor 80 is provided at the back of the storage space between the shelf 36c and the shelf 36d, and detects the temperature in the refrigerator compartment 2.

図５は図４中に示すＡ−Ａ断面を上方から見た図である。図５中に矢印で示すように、冷蔵室冷気ダクト１１の側面吐出口３３から吐出された冷気は、冷蔵室２の斜め前方に向けて流れる。冷蔵室２の背面と側面の断熱壁の外箱内面には真空断熱材２５が備えられている。また、冷蔵室冷気ダクト１１の前面内側には、冷蔵室冷気ダクト１１の表面への結露，着霜を防止するために断熱部材９０が配設されている。また、冷蔵庫１の背面角部には、冷蔵庫１の両側面と背面が遮蔽状態となった場合であっても、図２中に示す機械室１９内の凝縮器５５や圧縮機２４からの放熱が良好に行われるように、機械室１９から冷蔵庫１の上方空間に連通する通気スペース５８が上下に延伸して設けられている。通気スペース５８を形成する外箱面５２ａと、冷蔵庫１の背面を形成する外箱面５２ｂから成る角部内面に、冷蔵室２の背面に位置する断熱壁内に配設された真空断熱材２５と離間して冷凍サイクルの放熱パイプ５６が配設されている。 FIG. 5 is a view of the AA cross section shown in FIG. 4 as viewed from above. As indicated by arrows in FIG. 5, the cold air discharged from the side surface discharge port 33 of the cold room cold air duct 11 flows toward the oblique front of the cold room 2. A vacuum heat insulating material 25 is provided on the inner surface of the outer box of the rear and side heat insulating walls of the refrigerator compartment 2. Further, a heat insulating member 90 is disposed inside the front surface of the cold room cold air duct 11 in order to prevent condensation and frost formation on the surface of the cold room cold air duct 11. Further, even if both sides and the back of the refrigerator 1 are shielded at the rear corners of the refrigerator 1, heat is radiated from the condenser 55 and the compressor 24 in the machine room 19 shown in FIG. The ventilation space 58 that communicates from the machine room 19 to the upper space of the refrigerator 1 is provided extending vertically. The vacuum heat insulating material 25 disposed in the heat insulating wall located on the back surface of the refrigerator compartment 2 on the inner surface of the corner portion composed of the outer box surface 52a forming the ventilation space 58 and the outer box surface 52b forming the back surface of the refrigerator 1. A heat radiating pipe 56 of the refrigeration cycle is disposed apart from the refrigeration cycle.

図６は本実施例の冷蔵庫に用いられている真空断熱材を表す断面図である。図６に示すように真空断熱材２５は、コア材７０（グラスウール）を、吸着剤７１（合成ゼオライト）と共に内袋７２（ポリエチレン）内に圧縮密閉し、外包材７３（アルミ蒸着フィルム層を含むラミネートフィルム）内に挿入し、真空引き後、端部を熱溶着することで製造される。したがって、真空断熱材の端部には、熱溶着部２５ａが残る。本実施例の冷蔵庫の真空断熱材２５は、図５に示すように熱溶着部２５ａは、庫内側に折り返して固定した後に、発泡断熱材を発泡させることで発泡断熱材５３内に埋設される。 FIG. 6 is a cross-sectional view showing a vacuum heat insulating material used in the refrigerator of this embodiment. As shown in FIG. 6, the vacuum heat insulating material 25 compresses and seals the core material 70 (glass wool) in the inner bag 72 (polyethylene) together with the adsorbent 71 (synthetic zeolite), and includes an outer packaging material 73 (including an aluminum vapor deposition film layer). (Laminate film) is inserted, and after vacuuming, the end is thermally welded. Therefore, the heat welding part 25a remains in the edge part of a vacuum heat insulating material. The vacuum heat insulating material 25 of the refrigerator of the present embodiment is embedded in the foam heat insulating material 53 by foaming the foam heat insulating material after the heat welded portion 25a is folded and fixed inside the cabinet as shown in FIG. .

図７は本実施例の冷蔵庫の冷蔵室冷気ダクトに備えられた側面吐出口とその周辺の構造を表す図である。図７に示すように、冷蔵室冷気ダクト１１の側面１１ａは冷蔵室２の前方に向くように角度θ１（本実施例の冷蔵庫ではθ１＝４.０９°）だけ傾斜している。側面吐出口３３から吐出される冷気８１は、側面１１ａにほぼ直角に吐出されるので、冷気８１の指向角度α１はθ１にほぼ等しい。側面吐出口３３から吐出された冷気８１は側面１１ａに対向して設けられた、側面吐出口３３の前端部３３ａと同程度の位置まで冷蔵室２の前方に向けて突出したリブ６１のθ２だけ傾斜した傾斜面６１ａ（本実施例の冷蔵庫ではθ２＝７.５７゜）に当たり、さらに転向され、角度α２程度（本実施例の冷蔵庫ではα２≒４５゜）に指向した冷気８２となり冷蔵室２の斜め前方に向けて放出される。また、側面吐出口３３の背面側端部３３ｂは、リブ６１の根元部６１ｂから距離Ｌ３（本実施例の冷蔵庫ではＬ３＝５mm）だけ離間している。 FIG. 7 is a diagram showing the structure of the side discharge port provided in the refrigerator air cooler duct of the refrigerator of the present embodiment and its surroundings. As shown in FIG. 7, the side surface 11 a of the refrigerator compartment cold air duct 11 is inclined by an angle θ1 (θ1 = 4.09 ° in the refrigerator of this embodiment) so as to face the front of the refrigerator compartment 2. Since the cold air 81 discharged from the side discharge port 33 is discharged at a substantially right angle to the side surface 11a, the directivity angle α1 of the cold air 81 is substantially equal to θ1. The cool air 81 discharged from the side discharge port 33 is only θ2 of the rib 61 that is provided facing the side surface 11a and protrudes toward the front of the refrigerating chamber 2 to the same position as the front end portion 33a of the side discharge port 33. It hits the inclined surface 61a (θ2 = 7.57 ° in the refrigerator of this embodiment) and is further turned to become cold air 82 directed at an angle α2 (α2≈45 ° in the refrigerator of this embodiment). Released diagonally forward. Further, the rear side end portion 33b of the side surface discharge port 33 is separated from the root portion 61b of the rib 61 by a distance L3 (L3 = 5 mm in the refrigerator of the present embodiment).

以上で、本実施例の冷蔵庫の構成を説明したが、以下では、本実施例の冷蔵庫の奏する効果を説明する。 The configuration of the refrigerator according to the present embodiment has been described above. Hereinafter, effects achieved by the refrigerator according to the present embodiment will be described.

本実施例の冷蔵庫は、図５に示すように、冷蔵室冷気ダクト１１の側面吐出口３３からの冷気は、冷蔵室２の斜め前方に向けて吐出される。これにより、熱損失を抑えられ、また、冷蔵室内の温度ムラを抑えることができる。以下で図５，図８及び図９を参照しながらその理由を説明する。 In the refrigerator of this embodiment, as shown in FIG. 5, the cold air from the side discharge port 33 of the cold room cold air duct 11 is discharged obliquely forward of the cold room 2. Thereby, heat loss can be suppressed and temperature unevenness in the refrigerator compartment can be suppressed. The reason will be described below with reference to FIGS.

図８はダクトから側方に冷気を吐出した場合の冷気の流れを表す図、図９はダクトから前方に冷気を吐出した場合の冷気の流れを表す図である。 FIG. 8 is a diagram illustrating the flow of cold air when the cool air is discharged from the duct to the side, and FIG. 9 is a diagram illustrating the flow of cold air when the cool air is discharged forward from the duct.

図８に示すように、冷蔵室冷気ダクト１１から側方に向けて冷気を吐出する場合、冷蔵室冷気ダクト１１内からの低温冷気が直接冷蔵室２の背面を冷却することになる。熱損失は温度差に比例して大きくなることから、冷蔵室冷気ダクト１１内の冷凍室並の低温冷気を側方に放出して冷蔵室２の背面に沿って流すと、冷蔵室２の背面における庫外と庫内の温度差が大きくなるため熱損失は大きくなる。また、冷気は、冷蔵室２の背面に沿って流れた後に、冷蔵室２の側面によって前方に転向され、冷蔵室扉２ａ及び２ａ′方向に向かって流れ、冷蔵室扉２ａに備えられている扉ポケット３２に至り扉ポケット３２内の食品が冷却される。このような流れにより冷蔵室２を冷却する場合、低温冷気がはじめに通る冷蔵室２の背面近傍の領域（領域ｃ′）は十分冷却され、次に冷気が通る、冷蔵室２の側面近傍の領域（領域ａ′）は比較的良く冷却される。一方で、扉ポケット３２に至るまでに冷気は冷蔵室２の背面及び側面と熱交換し温度が上昇し、さらに、冷蔵室冷気ダクト１１から扉ポケット３２に至るまでの経路が長いため、風速も落ちている。したがって、扉ポケット３２の冷却性能が悪くなり、温度が高くなるという問題が生じる。また、食品が多く設置される中心付近の広い領域（領域ｂ′）には、冷気がほとんど到達しないため、領域ｂ′付近の温度は高くなる。以上のように、冷蔵室冷気ダクト１１から側方に向けて冷気を吐出するようにすると、熱損失が大きく、冷蔵室２内の温度ムラも大きくなる。 As shown in FIG. 8, when the cold air is discharged from the cold room cold air duct 11 to the side, the low temperature cold air from the cold room cold air duct 11 directly cools the back surface of the cold room 2. Since the heat loss increases in proportion to the temperature difference, when the low-temperature cold air in the refrigerator compartment cold air duct 11 is discharged to the side and flows along the rear surface of the refrigerator compartment 2, the rear surface of the refrigerator compartment 2 is returned. Since the temperature difference between the outside and inside of the container becomes large, the heat loss becomes large. In addition, the cold air flows along the back surface of the refrigerating chamber 2, and then is turned forward by the side surface of the refrigerating chamber 2, flows toward the refrigerating chamber doors 2a and 2a ', and is provided in the refrigerating chamber door 2a. The food in the door pocket 32 is cooled down to the door pocket 32. When the refrigerator compartment 2 is cooled by such a flow, the region in the vicinity of the back surface of the refrigerator compartment 2 (region c ′) through which the low temperature cold air first passes is sufficiently cooled, and then the region in the vicinity of the side surface of the refrigerator compartment 2 through which the cold air passes. (Region a ') is cooled relatively well. On the other hand, the cold air exchanges heat with the back and side surfaces of the refrigerator compartment 2 until reaching the door pocket 32, and the temperature rises. Further, since the path from the refrigerator compartment cold air duct 11 to the door pocket 32 is long, the wind speed is also high. falling. Therefore, the cooling performance of the door pocket 32 is deteriorated and the temperature is increased. Further, since the cold air hardly reaches the wide area (area b ′) near the center where many foods are installed, the temperature near the area b ′ becomes high. As described above, when cold air is discharged from the cold room cold air duct 11 to the side, heat loss is large and temperature unevenness in the cold room 2 is also large.

また、図９に示すように、冷蔵室冷気ダクト１１から前方に向けて冷気を吐出する場合、冷蔵室冷気ダクト１１の前方の領域（領域ｂ″）は十分冷却されるが、冷蔵室２の背面の幅に対して冷蔵室冷気ダクト１１の幅が狭いため、冷蔵室２の左右の領域（領域ａ″）は十分冷却されず温度が高くなるという問題が生じる。また、本実施例の冷蔵庫のように冷蔵室扉２ａが左右に分割された冷蔵庫では、扉２ａ−２ａ′間に断熱性能が低い部分（領域ｄ）が存在する。図９に示すように冷蔵室冷気ダクト１１から前方に向けて冷気を吐出する場合、この領域ｄに直接多量の低温冷気が到達することになり、熱損失が大きくなるという問題も生じる。以上のように、冷蔵室冷気ダクト１１から前方に向けて冷気を吐出するようにすると、熱損失が大きく、冷蔵室２内の温度ムラも大きくなる。 Further, as shown in FIG. 9, when the cold air is discharged forward from the cold room cold air duct 11, the area in front of the cold room cold air duct 11 (area b ″) is sufficiently cooled. Since the width of the refrigerator compartment cool air duct 11 is narrower than the width of the rear surface, the left and right regions (region a ″) of the refrigerator compartment 2 are not sufficiently cooled, resulting in a problem that the temperature rises. Moreover, in the refrigerator in which the refrigerator compartment door 2a is divided into right and left like the refrigerator of the present embodiment, there is a portion (region d) having low heat insulation performance between the doors 2a-2a ′. As shown in FIG. 9, when the cool air is discharged forward from the cold room cool air duct 11, a large amount of low temperature cool air directly reaches this region d, which causes a problem that heat loss increases. As described above, if cold air is discharged forward from the cold room cold air duct 11, heat loss is large and temperature unevenness in the cold room 2 is also large.

また、例えば、冷蔵室冷気ダクト１１から冷気を、側方と前方の双方に吐出するようにした場合、温度ムラは側方のみあるいは前方のみに吐出する場合に比べてやや改善するものの、熱損失が大きくなってしまい省エネ性が悪化し望ましくない。 Further, for example, when the cool air is discharged from the cold room cool air duct 11 to both the side and the front, the temperature unevenness is slightly improved as compared with the case where the temperature unevenness is discharged only to the side or only the front, but heat loss Is undesirably deteriorated due to the large energy consumption.

一方、本実施例の冷蔵庫では、図５に示すように、冷蔵室冷気ダクト１１から斜め前方に向けて冷気を吐出しているため、冷蔵室２の背面には直接低温冷気が到達せず、冷蔵室２の背面における熱損失は小さく抑えられている。また、扉ポケット３２に至るまでに冷気は冷蔵室２の側面の扉２ａ（２ａ′）側の一部と熱交換するのみであるため、比較的低温の冷気が扉ポケット３２に到達する。また、冷気が斜め前方に向かうことから、扉ポケット３２に至る経路が、図８に示す流れに比べて短くなるため、比較的高い風速の流れが扉ポケット３２に到達する。よって、扉ポケット３２は良好に冷却される。また、冷気は冷蔵室冷気ダクト１１から斜め前方に向けて拡散しながら進むため、冷蔵室冷気ダクト１１の斜め前方の広い領域（領域ａ）を比較的均一に冷却できる。また、冷蔵室扉２ａ−２ａ′間の断熱性能が低い部分（領域ｄ）に直接多量の低温冷気が到達することはないため、領域ｄにおける熱損失も小さく抑えられている。これらにより、本実施例の冷蔵庫では、冷蔵室における熱損失が抑えられ、また、冷蔵室内の温度ムラも小さく抑えることができる。 On the other hand, in the refrigerator of the present embodiment, as shown in FIG. 5, since cold air is discharged obliquely forward from the cold room cold air duct 11, low temperature cold air does not reach the back of the cold room 2 directly, The heat loss at the back of the refrigerator compartment 2 is kept small. Further, since the cold air only exchanges heat with a part of the side surface of the refrigerator compartment 2 on the side of the door 2a (2a ') before reaching the door pocket 32, relatively low temperature cold air reaches the door pocket 32. Further, since the cool air is directed obliquely forward, the path to the door pocket 32 is shorter than the flow illustrated in FIG. 8, and thus a relatively high wind speed flow reaches the door pocket 32. Therefore, the door pocket 32 is cooled well. Further, since the cold air diffuses from the cold room cold air duct 11 while being diffused obliquely forward, the wide area (region a) obliquely forward of the cold room cold air duct 11 can be cooled relatively uniformly. In addition, since a large amount of low-temperature cold air does not directly reach the portion (region d) where the heat insulating performance between the refrigerator compartment doors 2a-2a 'is low, heat loss in the region d is also kept small. As a result, in the refrigerator according to the present embodiment, heat loss in the refrigerator compartment can be suppressed, and temperature unevenness in the refrigerator compartment can be reduced.

本実施例の冷蔵庫は、冷蔵室冷気ダクト１１の側面を傾斜面１１ａとして、傾斜面１１ａに側面吐出口３３を設けることで、冷気を冷蔵室２の斜め前方に指向させる冷気指向手段としている。これにより、冷気に指向性を与えるための複雑な構造を必要としないため低コストにできる。 The refrigerator of the present embodiment is a cold air directing means for directing cold air diagonally forward of the refrigerator compartment 2 by providing the side surface of the refrigerator compartment cold air duct 11 as the inclined surface 11a and providing the side surface discharge port 33 on the inclined surface 11a. Thereby, since a complicated structure for giving directivity to the cold air is not required, the cost can be reduced.

本実施例の冷蔵庫は、図７に示すように、第一段階の冷気指向手段として、側面吐出口３３を設ける冷蔵室冷気ダクト側面１１ａを傾斜面として、第二段階の冷気指向手段として、冷蔵室冷気ダクト１１ａ側面に対向する位置にリブ６１を設けている。このように、冷気指向手段を二段階に設けることによって、側面吐出口３３近傍に着霜が生じた場合であっても、冷蔵室２内に吐出される冷気の指向角度α２の変化を小さくでき、性能が低下し難い信頼性の高い冷蔵庫にできる。以下で図７を参照しながらその理由を説明する。 As shown in FIG. 7, the refrigerator of the present embodiment has a refrigerator compartment cold air duct side surface 11a provided with a side discharge port 33 as an inclined surface as a first stage cold air directing means, and a cold storage as a second stage cold air directing means. The rib 61 is provided in the position facing the side surface of the room cool air duct 11a. Thus, by providing the cold air directing means in two stages, even if frost is formed near the side discharge port 33, the change in the directivity angle α2 of the cold air discharged into the refrigerator compartment 2 can be reduced. It is possible to make a highly reliable refrigerator whose performance is difficult to deteriorate. The reason will be described below with reference to FIG.

冷蔵室２内には、望ましくはないが、水分を多く含み比較的温度の高い食品が投入されることがあり得る（例えば十分冷ましていない汁物の入った鍋等）。そのような食品を投入すると、食品の熱で冷蔵室内温度は上昇し、また、食品の水分で冷蔵室内湿度も上昇する。一方、冷蔵庫１は、冷蔵室２内に設置された温度センサ８０（図４参照）により冷蔵室２内の温度上昇を検知し、所定温度に下げるために低温冷気を冷蔵室２内に送る運転を開始する。このとき、冷蔵室２内は湿度が高い状態にあるため、氷点以下の壁面には霜が成長しやすい状態となっている。冷蔵室２内の冷却運転が行われている場合、冷凍室並の低温冷気が通過する側面吐出口３３近傍には氷点以下の領域が生じ、特に庫内空気と接していて、かつ冷気がよどんでいる図７中に示す領域Ａ，領域Ｂには着霜が生じやすい（領域Ｃは冷気がよどんでいるが、冷蔵室２内の空気と接していないため着霜は生じ難い）。領域Ａに霜が成長した場合、側面吐出口３３における吐出冷気が前方に向くことを遮るため角度α１は小さくなる方向に変化する。一方、着霜が生じやすいリブ６１の領域Ｂにも霜が成長するが、領域Ｂに霜が成長した場合、見かけ上リブ６１の高さが高くなることになるため、リブによる転向作用は着霜がない場合より大きくなる。よって、結果として、霜が成長した場合であっても、冷蔵室２内に放出される冷気の指向角度α２の変化を小さく抑えることができる。これにより、ユーザーが水分を多く含み比較的温度の高い食品を冷蔵室内に投入する等によって側面吐出口３３近傍に着霜が生じても、冷気の吐出方向の変化が小さく抑えられ、良好な冷却性能を維持することができ、信頼性の高い冷蔵庫となる。 Although not desirable, the refrigerator compartment 2 may be filled with a food containing a large amount of water and having a relatively high temperature (for example, a pan containing soup that has not been sufficiently cooled). When such food is introduced, the temperature of the refrigerator compartment increases due to the heat of the food, and the humidity of the refrigerator compartment increases due to the moisture of the food. On the other hand, the refrigerator 1 detects the temperature rise in the refrigerator compartment 2 by a temperature sensor 80 (see FIG. 4) installed in the refrigerator compartment 2, and sends low-temperature cold air into the refrigerator compartment 2 to lower it to a predetermined temperature. To start. At this time, since the humidity in the refrigerator compartment 2 is high, frost tends to grow on the wall surface below the freezing point. When the cooling operation in the refrigerator compartment 2 is performed, a region below the freezing point is generated in the vicinity of the side discharge port 33 through which low-temperature cold air similar to that in the freezer compartment passes, and in particular, the cold air is in contact with the internal air and cold In the area A and area B shown in FIG. 7, frost formation is likely to occur (in the area C, cold air is stagnant, but since it is not in contact with the air in the refrigerator compartment 2, frost formation is difficult to occur). When frost grows in the region A, the angle α1 changes in the direction of decreasing in order to block the cool discharge air from the side discharge port 33 from moving forward. On the other hand, frost also grows in the region B of the rib 61 where frost formation is likely to occur. However, when the frost grows in the region B, the height of the rib 61 is apparently increased. Greater than without frost. Therefore, as a result, even if frost grows, the change in the directivity angle α2 of the cold air discharged into the refrigerator compartment 2 can be suppressed to a small level. As a result, even if frosting occurs in the vicinity of the side discharge port 33, such as when a user puts a lot of water and relatively high temperature food into the refrigeration chamber, the change in the discharge direction of the cold air is suppressed to a small level and good cooling is achieved. The performance can be maintained and the refrigerator becomes highly reliable.

本実施例の冷蔵庫は、図７に示すように、リブ６１に斜め前方に向く傾斜面６１ａを持たせている。これにより、リブ６１における転向がスムーズに行われ、転向の際の損失を比較的小さくできる。 In the refrigerator of this embodiment, as shown in FIG. 7, the rib 61 has an inclined surface 61 a that faces obliquely forward. Thereby, the turn in the rib 61 is performed smoothly and the loss at the time of the turn can be made comparatively small.

本実施例の冷蔵庫は、図７に示すように、リブ６１は、側面吐出口３３の前端３３ａと同程度冷蔵室２内に突出させている。これにより、側面吐出口３３から吐出される冷気を確実に前方に指向させることができる。 In the refrigerator of this embodiment, as shown in FIG. 7, the rib 61 protrudes into the refrigerator compartment 2 to the same extent as the front end 33 a of the side discharge port 33. Thereby, the cold air discharged from the side surface discharge port 33 can be reliably directed forward.

本実施例の冷蔵庫は、図４及び図５に示すように、冷蔵室冷気ダクト１１の左右両側の冷蔵室背面に、冷却パネル３５を備えている。これにより、冷気が直接届き難い冷蔵室冷気ダクト１１の左右両側の背面近傍領域（図５中に示す領域ｃ）を補助的に冷却でき、温度ムラの小さい冷蔵庫にできる。また、冷蔵室冷気ダクト１１から吐出される冷凍室並の低温冷気が、冷却パネル３５上に直接流れると、冷蔵室背面の広範囲が冷却パネル３５によって非常に低温となり、表面に霜が成長するといった不具合が生じることがあるが、本実施例の冷蔵庫では、側面吐出口３３から吐出される冷気は、冷蔵室２の斜め前方に向けて流れるため、直接低温冷気が冷却パネル３５を冷却することはなく、上記のような不具合は生じない。 As shown in FIGS. 4 and 5, the refrigerator of the present embodiment includes a cooling panel 35 on the back of the left and right refrigerator compartments of the refrigerator compartment cool air duct 11. Thereby, the back surface vicinity area | region (area | region c shown in FIG. 5) of the right-and-left both sides of the refrigerator compartment cold air duct 11 to which cold air cannot reach directly can be supplementarily cooled, and it can be set as the refrigerator with small temperature nonuniformity. In addition, when low-temperature cold air similar to the freezer compartment discharged from the cold-chamber cold air duct 11 flows directly on the cooling panel 35, the wide area on the back of the refrigerator compartment becomes very low temperature by the cooling panel 35, and frost grows on the surface. In the refrigerator of the present embodiment, the cold air discharged from the side discharge port 33 flows toward the diagonally front of the refrigerator compartment 2, and therefore the low temperature cold air directly cools the cooling panel 35. There is no such problem.

本実施例の冷蔵庫は、図７に示すように、側面吐出口３３の背面側端部３３ｂは、リブ６１の根元部６１ｂから距離Ｌ２だけ離間している。これにより、食品くず等が風路を閉塞することによって冷却性能が低下するといった不具合が生じ難い信頼性の高い冷蔵庫とすることができる。その理由を以下で説明する。 In the refrigerator of the present embodiment, as shown in FIG. 7, the rear side end portion 33 b of the side surface discharge port 33 is separated from the root portion 61 b of the rib 61 by a distance L <b> 2. Thereby, it can be set as the highly reliable refrigerator which cannot produce the malfunction that a cooling performance falls by food waste etc. obstruct | occluding an air path. The reason will be described below.

食品くず等は狭い領域に溜まりやすい傾向にある。したがって、そのように食品くずが溜まりやすい場所に吐出口を設けると、食品くずが吐出口を閉塞したり、食品くずがダクト内に入り込む事態が生じる。吐出口が閉塞されると、冷気供給量が減少し、冷却性能が低下する。また、食品くずがダクト内に入り込んだ場合、食品くずがダクト内を落下し、ダクト内に蓄積される。ダクト内に蓄積された食品くずはユーザーが取り除くことは困難なため、やがて、ダクトの流路断面が減少し、冷却性能の低下を招く。本実施例の冷蔵庫は、側面吐出口３３の背面側端部３３ｂは、リブ６１の根元部６１ｂから距離Ｌ２だけ離間している。よって、冷蔵室冷気ダクト側面１１ａとリブ６１間領域の奥部に、高さ（深さ）Ｌ２程度の食品くずが溜まりやすい狭領域（領域Ｃ）を設けている。これにより、食品くずが冷蔵室冷気ダクト側面１１ａとリブ６１の間に入った場合であっても、食品くずは領域Ｃに留まりやすく、側面吐出口３３を介して冷蔵室冷気ダクト１１内に侵入する、あるいは、側面吐出口３３近傍に留まり、側面吐出口３３を閉塞するといった不具合が生じ難くなっている。なお、領域Ｃに溜まった食品くずは、ユーザーが容易に除去することができる。 Food waste and the like tend to accumulate in a narrow area. Therefore, when the discharge port is provided in such a place where food waste is likely to accumulate, food waste may block the discharge port, or food waste may enter the duct. When the discharge port is closed, the amount of cold air supplied decreases and the cooling performance deteriorates. When food waste enters the duct, the food waste falls in the duct and accumulates in the duct. Since it is difficult for the user to remove the food waste accumulated in the duct, the flow passage cross section of the duct is eventually reduced, leading to a decrease in cooling performance. In the refrigerator of this embodiment, the rear side end portion 33 b of the side surface discharge port 33 is separated from the root portion 61 b of the rib 61 by a distance L 2. Therefore, a narrow region (region C) in which food waste having a height (depth) of L2 is likely to accumulate is provided at the back of the region between the cold air duct side wall 11a and the rib 61. Thereby, even when food waste enters between the refrigerator compartment cold air duct side surface 11a and the rib 61, the food waste tends to stay in the region C and enters the refrigerator compartment cold air duct 11 via the side discharge port 33. Alternatively, it is difficult to cause a problem that the side discharge port 33 is blocked by staying in the vicinity of the side discharge port 33. Note that the food waste collected in the region C can be easily removed by the user.

本実施例の冷蔵庫は、図４に示すように、冷蔵室冷気ダクト１１の前面に、側面吐出口３３より開口面積の小さい前面吐出口３４を備えている。これにより、冷気が直接届き難い冷蔵室冷気ダクト１１の正面の領域（図５中に示す領域ｂ）を補助的に冷却でき、温度ムラの小さい冷蔵庫にできる。また、側面吐出口３３に比べて開口面積が小さいため、側面吐出口３３からの吐出冷気に比べて少量の冷気が吐出される。よって、冷蔵室２の前方に向けて吐出しても、図５に示す冷蔵室扉２ａ−２ａ′間の断熱性能が低い部分（図５中に示す領域ｄ）に多量の低温冷気が到達することはないため、領域ｄにおける熱損失の増加の影響は小さく抑えられている。 As shown in FIG. 4, the refrigerator according to the present embodiment includes a front discharge port 34 having an opening area smaller than that of the side discharge port 33 on the front surface of the cold room cold air duct 11. Thereby, the area | region (area | region b shown in FIG. 5) of the front of the refrigerator compartment cold air duct 11 to which cold air cannot reach directly can be cooled auxiliary, and it can be set as the refrigerator with small temperature nonuniformity. Further, since the opening area is smaller than that of the side discharge port 33, a small amount of cold air is discharged compared to the discharge cold air from the side discharge port 33. Therefore, even if it discharges toward the front of the refrigerator compartment 2, a large amount of low temperature cold air reaches a portion (region d shown in FIG. 5) where the heat insulation performance between the refrigerator compartment doors 2a-2a ′ shown in FIG. 5 is low. Therefore, the influence of the increase in heat loss in the region d is kept small.

本実施例の冷蔵庫は、図５または図７に示すように、冷蔵室冷気ダクト１１は、冷蔵室冷気ダクトを形成する面のうち、庫内背壁１１ｂのみ冷蔵室２の背面に位置する断熱壁に接している。これにより、冷蔵室冷気ダクト１１から庫外に冷熱が伝わる伝熱経路は、ダクトの背面１１ｃに限られるため、冷蔵室冷気ダクト１１内の冷気の熱損失が小さく抑えられる。 In the refrigerator of this embodiment, as shown in FIG. 5 or FIG. 7, the refrigerating room cold air duct 11 is a heat insulating material in which only the interior back wall 11 b is located on the back of the refrigerating room 2 among the surfaces forming the refrigerating room cold air duct. It touches the wall. As a result, the heat transfer path through which the cold heat is transmitted from the cold room cold air duct 11 to the outside of the refrigerator is limited to the back surface 11c of the duct, so that the heat loss of the cold air in the cold room cold air duct 11 is suppressed to a small value.

本実施例の冷蔵庫は、図５に示すように、冷蔵室２の側面に位置する断熱壁内に真空断熱材２５を配設している。これにより、冷蔵室冷気ダクト１１から冷蔵室斜め前方に向けて吐出した低温冷気が最初に衝突して低温になりやすい冷蔵室２の側面における熱損失を効果的に低減できる。 As shown in FIG. 5, the refrigerator of this embodiment has a vacuum heat insulating material 25 disposed in a heat insulating wall located on the side surface of the refrigerator compartment 2. Thereby, the heat loss in the side surface of the refrigerator compartment 2 which the low temperature cold air discharged toward the diagonally forward direction of the refrigerator compartment from the cold compartment cold air duct 11 collides first and tends to become a low temperature can be effectively reduced.

本実施例の冷蔵庫は、図５に示すように、冷蔵室２の背面に位置する断熱壁内に真空断熱材２５を配設している。これにより、特に冷凍室並の低温冷気が通過する冷蔵室冷気ダクト１１における熱損失を効果的に低減できる。 As shown in FIG. 5, the refrigerator of this embodiment has a vacuum heat insulating material 25 disposed in a heat insulating wall located on the back surface of the refrigerator compartment 2. Thereby, especially the heat loss in the refrigerator compartment cold air duct 11 through which the low temperature cold air comparable to a freezer compartment passes can be reduced effectively.

本実施例の冷蔵庫では、図５に示すように、通気スペース５８を構成する外箱面５２ａと、冷蔵庫１の背面を形成する外箱面５２ｂから形成される角部内面に、冷蔵室背面断熱壁２ｂ内に配設された真空断熱材２５と離間して冷凍サイクルの放熱パイプ５６が配設されている。これにより、放熱パイプ５６は角部に確実に配設できるため、ウレタン発泡時の発泡圧力により放熱パイプの配設位置がずれて、真空断熱材に接触し、ヒートブリッジにより、放熱パイプの熱が庫内に侵入するという事態を防止できる。 In the refrigerator of the present embodiment, as shown in FIG. 5, the refrigerator compartment back heat insulation is provided on the inner surface of the corner formed by the outer box surface 52 a forming the ventilation space 58 and the outer box surface 52 b forming the rear surface of the refrigerator 1. A heat radiating pipe 56 of the refrigeration cycle is disposed away from the vacuum heat insulating material 25 disposed in the wall 2b. As a result, since the heat radiating pipe 56 can be reliably disposed at the corners, the heat radiating pipe is displaced due to the foaming pressure at the time of urethane foaming, and is in contact with the vacuum heat insulating material. It is possible to prevent the situation of entering the warehouse.

本実施例の冷蔵庫では、図５に示すように真空断熱材２５の熱溶着部２５ａは、庫内側に折り返して固定し、外箱５２内面に貼り付けて発泡断熱材内に埋設している。庫外側に折り返して固定した場合、ウレタン発泡時の発泡圧力で外箱が変形し、外観を損なう事態が生じる。また、折り返さずにそのまま伸ばしてウレタン発泡を行った場合、熱溶着部２５ａの影響でウレタンの流動が阻害されたり、また、熱溶着部２５ａが放熱パイプ５６と接触したりする事態が生じる。よって、真空断熱材２５の熱溶着部２５ａは、庫内側に折り返して固定するのが望ましく、これにより、冷蔵庫１の外観を損なわず、また、ウレタン流動性への悪影響や放熱パイプ５６と熱溶着部２５ａが接触する事態も回避できる。 In the refrigerator of the present embodiment, as shown in FIG. 5, the heat-welded portion 25 a of the vacuum heat insulating material 25 is folded back and fixed to the inside of the cabinet, and is attached to the inner surface of the outer box 52 and embedded in the foam heat insulating material. When it is folded back and fixed to the outside of the cabinet, the outer box is deformed by the foaming pressure at the time of urethane foaming, and the appearance is damaged. Further, when urethane foaming is performed by extending the sheet as it is without being folded, a situation occurs in which the flow of urethane is hindered by the influence of the heat welding part 25 a or the heat welding part 25 a comes into contact with the heat radiating pipe 56. Therefore, it is desirable that the heat-welded portion 25a of the vacuum heat insulating material 25 is folded and fixed to the inside of the cabinet, thereby preventing the appearance of the refrigerator 1 from being impaired, and adversely affecting the urethane fluidity and heat-welding with the heat radiating pipe 56. The situation where the part 25a contacts can also be avoided.

本発明の実施例に係る冷蔵庫の正面図。The front view of the refrigerator which concerns on the Example of this invention. 本発明の実施例に係る冷蔵庫の庫内の構成を表す断面図。Sectional drawing showing the structure in the store | warehouse | chamber of the refrigerator which concerns on the Example of this invention. 本発明の実施例に係る冷蔵庫の冷凍サイクルの配管を透視した図。The figure which saw through the piping of the refrigerating cycle of the refrigerator which concerns on the Example of this invention. 本発明の実施例に係る冷蔵庫の冷蔵室の扉を開けた状態を正面から見た図。The figure which looked at the state which opened the door of the refrigerator compartment of the refrigerator which concerns on the Example of this invention from the front. 図４のＡ−Ａ断面を矢印方向に見た図。The figure which looked at the AA cross section of FIG. 4 in the arrow direction. 本発明の実施例に係る真空断熱材の構成を表す断面図。Sectional drawing showing the structure of the vacuum heat insulating material which concerns on the Example of this invention. 本発明の実施例に係る側面吐出口及びリブ近傍の拡大図。The enlarged view of the side discharge port and rib vicinity which concern on the Example of this invention. ダクトから側方に冷気を吐出する場合の流れを表す図。The figure showing the flow in the case of discharging cold air from a duct to the side. ダクトから前方に冷気を吐出する場合の流れを表す図。The figure showing the flow in the case of discharging cool air ahead from a duct.

符号の説明Explanation of symbols

１冷蔵庫
２冷蔵室
２ａ冷蔵室扉
２ｂ冷蔵室背面断熱壁
２ｃ冷蔵室側面
２ｄ冷蔵室背面
３製氷室
３ａ製氷室扉
４上段冷凍室
４ａ上段冷凍室扉
４ｂ上段冷凍室収納容器
５下段冷凍室
５ａ下段冷凍室扉
５ｂ下段冷凍室収納容器
６野菜室
６ａ野菜室扉
６ｂ野菜室収納容器
７冷却器
８冷却器収納室
９庫内送風ファン
１０断熱箱体
１１冷蔵室冷気ダクト
１２上段冷凍室冷気ダクト
１３下段冷凍室冷気ダクト
２０ダンパ
２１蒸発皿
２２除霜ヒータ
２３樋
２４圧縮機
２５真空断熱材
２７排水管
２８，２９断熱仕切壁
３０，３７食品
３１基板
３２扉ポケット
３３側面吐出口
３４前面吐出口
３６ａ〜３６ｄ棚
３８風向転向リブ
３９ａ，３９ｂ，５１内箱
５２外箱
５３発泡断熱材
５５凝縮器
５６放熱パイプ
５７絞り
５８通気スペース
６１リブ
７０コア材
７１吸着剤
７２内袋
７３外包材
８０温度センサ
８１，８２冷気
９０断熱部材 DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigeration room 2a Refrigeration room door 2b Refrigeration room back heat insulation wall 2c Refrigeration room side surface 2d Refrigeration room back 3 Ice making room 3a Ice making room door 4 Upper freezing room 4a Upper freezing room door 4b Upper freezing room storage container 5 Lower freezing room 5a Lower freezer compartment door 5b Lower freezer compartment storage container 6 Vegetable room 6a Vegetable room door 6b Vegetable room storage container 7 Cooler 8 Cooler storage room 9 Internal fan 10 Insulation box 11 Cold room cold air duct 12 Upper freezer cold air duct 13 Lower freezer compartment cold air duct 20 Damper 21 Evaporating dish 22 Defrost heater 23 樋 24 Compressor 25 Vacuum heat insulating material 27 Drain pipe 28, 29 Heat insulating partition walls 30, 37 Food 31 Substrate 32 Door pocket 33 Side outlet 34 Front outlet 36a-36d Shelf 38 Wind direction turning ribs 39a, 39b, 51 Inner box 52 Outer box 53 Foam insulation 55 Condenser 56 Radiation pipe 57 Restriction 58 Ventilation space 61 Rib 70 Core material 71 Adsorbent 72 Inner bag 73 Outer packaging material 80 Temperature sensor 81, 82 Cold air 90 Heat insulation member

Claims

内箱と外箱の中に発泡断熱材が充填され、冷蔵室と該冷蔵室の下方に冷凍室や野菜室を有し、圧縮機と、凝縮器と、放熱パイプと、冷却器を少なくとも有する冷凍サイクルが構成され、前記冷蔵室内には中央付近に前記冷却器からの冷気を前記冷蔵室に吐出させる吐出口を有する冷気ダクトを有する冷蔵庫において、
前記冷気ダクトの前記吐出口には、前記冷蔵室内へ斜め方向に冷気を吐出する冷気指向手段を備え、該冷気指向手段は、前記吐出口が形成された前記冷気ダクトの左右の側壁と、該側壁と対向して設けられて前記吐出口から吐出した冷気を斜めに変更させる傾斜部を有するリブ状部材と、を有し、
前記冷気ダクトの左右の側壁は、前記冷蔵室を正面から見た場合に、前記側壁の庫内背壁から手前側になるに従って内側に第一の角度θ１で傾斜して第一段階の冷気指向手段として、
前記リブ状部材の前記冷気が当たる傾斜部は、前記冷蔵庫を正面から見た場合に、前記リブ状部材の庫内背壁から手前側になるに従って外側に第二の角度θ２で傾斜して第二段階の冷気指向手段として、
前記第一の角度θ１よりも前記第二の角度θ２が大きく、前記第一段階の冷気指向手段で庫内背壁から第一の指向角度α１で吐出した冷気を、前記第二段階の冷気指向手段で前記第一の指向角度α１より大きい第二の指向角度α２に指向して前記冷蔵室に吐出させることを特徴とする冷蔵庫。 The inner box and the outer box are filled with foam heat insulating material, have a refrigerator compartment and a vegetable compartment below the refrigerator compartment, and have at least a compressor, a condenser, a heat radiating pipe, and a cooler. In the refrigerator having a refrigeration cycle, the refrigerator compartment having a cold air duct having a discharge port for discharging cold air from the cooler to the refrigerator compartment in the vicinity of the center,
The discharge port of the cold air duct is provided with cold air directing means for discharging cold air in an oblique direction into the refrigerator compartment, and the cold air directing means includes left and right side walls of the cold air duct in which the discharge port is formed, A rib-like member provided opposite to the side wall and having an inclined portion that obliquely changes the cold air discharged from the discharge port,
The left and right side walls of the cold air duct are inclined inward at a first angle θ1 toward the front side from the interior back wall of the side wall when the refrigerator compartment is viewed from the front, and the first stage of cold air orientation As a means
When the refrigerator is viewed from the front, the sloped portion of the rib-like member is inclined outward at a second angle θ2 from the inner back wall of the rib-like member toward the front side. As a two-stage cold air orientation means,
The second angle θ2 is larger than the first angle θ1, and the cold air discharged from the interior rear wall at the first directivity angle α1 by the first-stage cold-air directing means is the second-stage cold-air directivity. Refrigerator, characterized in Rukoto discharged to the refrigerating chamber and directed to the first directional angle α1 is greater than the second directivity angle α2 by means.

請求項１において、前記リブ状部材の庫内背壁からの高さは、前記吐出口の前縁部の前記庫内背壁からの高さと同じか、それ以上の高さに形成していることを特徴とする冷蔵庫。 In claim 1, the height from the internal back wall of the rib-like member is either equal to the height from the chamber in the back wall of the front edge of the discharge port, that are formed on the higher level A refrigerator characterized by that.

請求項１において、前記リブ状部材の前記冷気ダクトと反対側には、パネル状高熱伝導部材を配設したことを特徴とする冷蔵庫。 2. The refrigerator according to claim 1 , wherein a panel-like high heat conduction member is disposed on the opposite side of the rib-like member to the cold air duct .

請求項１において、前記吐出口よりも前記庫内背壁側に、前記冷気ダクトの左右の側壁と前記リブ状部材の間に形成される空間を設けたことを特徴とする冷蔵庫。 2. The refrigerator according to claim 1 , wherein a space formed between the left and right side walls of the cold air duct and the rib-shaped member is provided on the back wall side in the cabinet with respect to the discharge port .

請求項１において、前記冷気ダクトの前面にはスリット状の冷気吐出口を設けたことを特徴とする冷蔵庫。 2. The refrigerator according to claim 1 , wherein a slit-like cold air discharge port is provided in front of the cold air duct .

請求項１において、前記冷蔵室の庫内壁に冷気ダクトを設けたことを特徴とする冷蔵庫。 The refrigerator according to claim 1 , wherein a cold air duct is provided on an inner wall of the refrigerator compartment .

請求項１において、冷蔵庫本体の左右側面の断熱壁内に真空断熱材を配設したことを特徴とする冷蔵庫。 2. The refrigerator according to claim 1, wherein a vacuum heat insulating material is disposed in the heat insulating walls on the left and right side surfaces of the refrigerator main body .

請求項１において、冷蔵庫本体の背面の断熱壁内に真空断熱材を配設したことを特徴とする冷蔵庫。 The refrigerator according to claim 1, wherein a vacuum heat insulating material is disposed in a heat insulating wall on the back surface of the refrigerator main body .

請求項１において、前記冷蔵庫本体の角部に前記放熱パイプを備え、真空断熱材を前記放熱パイプと離間して配設したことを特徴とする冷蔵庫。 2. The refrigerator according to claim 1, wherein the heat radiating pipe is provided at a corner of the refrigerator main body, and a vacuum heat insulating material is disposed apart from the heat radiating pipe .

請求項９において、前記真空断熱材には熱溶着部である縁部を有し、前記縁部を庫内側に折り曲げた状態で前記外箱内面に配設したことを特徴とする冷蔵庫。 10. The refrigerator according to claim 9 , wherein the vacuum heat insulating material has an edge which is a heat welding part, and is arranged on the inner surface of the outer box in a state where the edge is bent to the inside of the cabinet .