JP3626828B2

JP3626828B2 - refrigerator

Info

Publication number: JP3626828B2
Application number: JP11076897A
Authority: JP
Inventors: 耕治前田
Original assignee: 松下冷機株式会社
Priority date: 1997-04-28
Filing date: 1997-04-28
Publication date: 2005-03-09
Anticipated expiration: 2017-04-28
Also published as: JPH10300325A

Description

【０００１】
【発明の属する技術分野】
本発明は冷蔵庫の冷気ダクトを構成する発泡性断熱材の係合仕様に関するものである。
【０００２】
【従来の技術】
従来の、冷蔵庫の冷気ダクトを構成する発泡性断熱材の係合仕様としては、特開平７−２６０３１６号公報、及び実開平４−７８４８８号公報に示されているものがある。
【０００３】
以下、図面を参照しながら上記従来の冷蔵庫を説明する。
図４は従来の冷蔵庫の冷気ダクトを構成する発泡性断熱材の係合仕様の断面図である。同図において、４は庫内を区画壁１で区画した冷蔵室２の背面に配設した温度調節箱である。温度調節箱４は化粧カバー５と、冷気ダクトを構成する前部発泡性断熱材６と、中部発泡性断熱材７と、後部発泡性断熱材８，冷気量を調節する冷気量調節装置９から成る。
【０００４】
冷気ダクトを構成する前部発泡性断熱材６，中部発泡性断熱材７，後部発泡性断熱材８は、それぞれから凹６ａ，８ｂ，凸部７ａ，７ｂを形成して、係合する仕様としている。
【０００５】
しかし、発砲成形によるバラツキ、量産時の数量アップの対応を図る為の多数型成形による型バラツキにより、凹凸の嵌合に隙間が発生する。これによる冷気漏れ防止の隙間シールは凸部上に貼り付けたシール部材９でなすことが公知されている。
【０００６】
また、それぞれの発泡性断熱材６，７，８を固定するためにテープ等を使用することも公知である。
【０００７】
また、図５は別の従来の冷蔵庫の冷気ダクトの水平断面分解図である。同図において、冷気ダクトは発泡性断熱材１１，１２で構成しており、発泡性断熱材１１，１２に設けた凸部１１ａと凹部１２ｃにて嵌合する仕様としている。凸部１１ａの側面には突出部１１ｂを設けてあり、凸部１１ａを凹部１２ｃに嵌合時、突出部１１ｂを圧縮して潰して隙間をシールする構成としている。
【０００８】
【発明が解決しようとする課題】
しかしながら、上記従来の構成では、冷気漏れ防止の隙間シール用のシール部材９や、発泡性断熱材６，７，８を固定するためのテープ等が必要でありコストアップになるという欠点があった。
【０００９】
本発明は従来の課題を解決するもので、冷気ダクトの低コスト化を狙った冷蔵庫を提供することを目的とする。
【００１０】
また、上記別の従来の構成では、凸部１１ａの側面に設けた突出部１１ｂを圧縮にて潰してシールする為、再組立時の突出部１１ｂの変形による隙間発生によるシール性確保の不安定、圧縮抵抗で挿入不測になりダクト厚みのアップの欠点があり、また、発泡性断熱材１１，１２の固定については、形状的な配慮がなく別の固定材が必要でコストアップの欠点があった。
【００１１】
本発明は従来の課題を解決するもので、再組立時のシール性を確保し、ダクト厚みも確保し、発泡性断熱材の固定も確実に行えて、しかも冷気ダクトの低コスト化を狙った冷蔵庫を提供することを目的とする。
【００１２】
【課題を解決するための手段】
この目的を達成するため本発明は、冷気ダクトを発泡性断熱材にて分割形成しこの発泡性断熱材の当接面に嵌合用凸部と凹部を形成したものにおいて、凸部は先端に設けた挿入部と係合部、凹部は先端に設けた逃がし部と係合部とからなり、凸部の挿入部の幅を凸部の係合部の幅より大で、かつ、凹部の逃がし部の幅を凹部の係合部の幅より大とし、かつ、凸部の挿入部の幅を凹部の係合部の幅より大としたことを特徴とするものである。
【００１３】
また、凹部の係合部の幅を凸部の係合部の幅より小としたことを特徴とするものである。
【００１４】
また、凸部の挿入部の先端を丸くしたことを特徴とするものである。
また、凸部の係合部の付け根に設けた肉付け部と、凹部の係合部の根元に設けた傾斜部を設けたことを特徴とするものである。
【００１５】
これにより、再組立時のシール性を確保し、ダクト厚みを確保し、発泡性断熱材の固定も確実に行えて、しかも冷気ダクトの低コスト化の効果が得られる。
【００１６】
【発明の実施の形態】
本発明は、冷気ダクトを分割形成する発泡性断熱材に設けた嵌合用凸部と凹部において、凸部は先端に設けた凸部の挿入部と凸部の係合部、凹部は先端に設けた凹部の逃がし部と凹部の係合部からなり、凸部の挿入部の幅を凸部の係合部の幅より大で、かつ、凹部の逃がし部の幅を凹部の係合部の幅より大で、かつ、凸部の挿入部の幅を凹部の係合部の幅より大としたものである。
【００１７】
このため、発泡性断熱材に設けた凹部の係合部を凸部の挿入部に嵌入時は、発泡性断熱材の弾性により凹部の係合部の幅が広がり凸部の挿入部の幅の段差を乗り越える。
【００１８】
凹部の係合部が凸部の係合部に嵌入後は凹部の係合部の幅が弾性復元し、凹部の係合部と凸部の挿入部の幅の段差により係止することができ、固定テープ等を使わないコスト低減の効果が得られる。
【００１９】
また、さらに、凹部の係合部の幅を凸部の係合部の幅より小としたものである。
【００２０】
これにより、凸部と凹部の嵌入後、発泡性断熱材の弾性により凹部の係合部が凸部の係合部を両側で挟み込み、ダブルシールの効果となり、シール部材を必要としないコスト低減の効果が得られる。
【００２１】
また、凸部の挿入部の先端を丸くしたものである。
これにより、凸部の挿入部を嵌入時のガイドをなすと共に、弾性変形時のガイドになり、再組立のシール確保の効果が得られる。
【００２２】
また、凸部の係合部の付け根に設けた肉付け部と、凹部の係合部の根元に設けた傾斜部を設けたものである。
【００２３】
これにより、凸部の挿入部を嵌入時のガイドをなすと共に、再組立時の凸部の折れや欠け防止用の補強になり、再組立性の向上の効果が得られる。
【００２４】
【実施例】
以下、本発明による冷蔵庫の実施例について、図面を参照しながら説明する。
【００２５】
図１は、本発明の実施例による冷蔵庫のダクトの水平分解断面図、図２は斜視図、図３は冷蔵庫の縦断面図である。
【００２６】
図において、１は外箱、２は内箱であり両箱間には断熱材３を発砲充填している。庫内は仕切り壁４で上段に位置する冷蔵室５と下段に位置する冷凍室６に区画されている。冷蔵室５および冷凍室６を冷却する冷気は、冷却器７で生成され送風機８で各室に供給される。
【００２７】
冷蔵室５に流入する冷気量を制御するダンパーサーモ９は前部発泡性断熱材２０，後部発泡性断熱材３０、で構成する冷気ダクト１０中に配設されている。ダンパーサーモ９で量を制御された冷気は、冷気ダクト１０に設けた冷気吐出穴１１から冷蔵室５内に吹き出される。
【００２８】
前部発泡性断熱材２０，後部発泡性断熱材３０にはそれぞれ、嵌合用凸部２１，凹部３１、を設けてあり、凸部２１は先端に設けた凸部の挿入部２２と凸部の係合部２３，凹部３１は先端に設けた凹部の逃がし部３２と凹部の係合部３３で構成している。
【００２９】
上記凸部の挿入部２２，凸部の係合部２３，凹部の逃がし部３２，凹部の係合部３３の幅関係は、以下の関係となっている。
【００３０】
凹部の逃がし部３２≧凸部の挿入部２２
＞凸部の係合部２３＞凹部の係合部３３
また、凸部の挿入部２２および凹部の逃がし部３２の断面形状は丸くしており、凸部の係合部２３の付け根に設けた面取り状の肉付け部２４と、凹部の係合部３３の根元に設けた傾斜部３４を設けている。
【００３１】
以上のように構成された冷蔵庫の冷気ダクト１０について、前部発泡性断熱材２０と後部発泡性断熱材３０の組立は、まず凸部の挿入部２２と凹部の係合部３３の幅について、凸部の挿入部２２＞凹部の係合部３３の差を、発泡性断熱材の弾性で乗り越える。
【００３２】
その後、凸部の挿入部２２は凹部の逃がし部３２まで挿入される。凹部の係合部３３と凸部の係合部２３の幅は、凸部の係合部２３＞凹部の係合部３３となっており、凹部の係合部３３が凸部の係合部２３を挟み込むことになる。
【００３３】
本実施例の冷蔵庫は、以上のように構成されているので、次の効果がある。
１）凹部の係合部３３と凸部の係合部２３の幅は、凸部の係合部２３＞凹部の係合部３３となっており、凹部の係合部３３が凸部の係合部２３を挟み込む関係にしている為、凸部の係合部２３の両サイドで凹部の係合部３３のダブルシールを形成することが出来、シール部材を必要としない低コストを実現できる。
【００３４】
また、圧縮による潰す構成としていない為、再組立によるシール性を確保するとともに、ダクト厚みを確保できる。
【００３５】
また、発砲成形や量産時の数量アップの対応を図る為の多数型成形による凹凸の位置、形状バラツキは発泡性断熱材の弾性で嵌合できる仕様となっている。
【００３６】
２）凹部の係合部３３と凸部の係合部２３の幅は、凸部の係合部２３＞凹部の係合部３３となっており、凹部の係合部３３が凸部の係合部２３を挟み込む関係にしていることと、さらに、挿入後の凸部の挿入部２２と凹部の係合部３３の関係は、凸部の挿入部２２＞凹部の係合部３３の逆段差となり、前部発泡性断熱材２０と後部発泡性断熱材３０の外れ防止となる。この為、発泡性断熱材の固定材を必要としない低コストを実現できる。
【００３７】
３）凸部の挿入部２２の断面形状を丸くしており、挿入時のガイド形状となり挿入作業性の向上になる。
【００３８】
４）凸部の係合部２３の付け根に面取り状に肉付け部２４を設けているので、凹部の係合部３３を凸部の係合部２３から外し時の外力による凸部の係合部２３の付け根折れ防止になる。また、凸部の係合部２３の付け根に面取り状に設けた肉付け部２４の挿入後の逃げとなる凹部の係合部３３の根元に設けた傾斜部３４は、凸部の挿入部２２の挿入時のガイド形状となり挿入作業性の向上になる。
【００３９】
【発明の効果】
以上説明したように本発明は、冷気ダクトを分割形成する発泡性断熱材に設けた嵌合用凸部と凹部において、凸部は先端に設けた凸部の挿入部と凸部の係合部、凹部は先端に設けた凹部の逃がし部と凹部の係合部からなり、凸部の挿入部の幅を凸部の係合部の幅より大で、かつ、凹部の逃がし部の幅を凹部の係合部の幅より大で、かつ、凸部の挿入部の幅を凹部の係合部の幅より大としたものである。
【００４０】
このため、発泡性断熱材に設けた凹部の係合部を凸部の挿入部に嵌入時は、発泡性断熱材の弾性により凹部の係合部の幅が広がり凸部の挿入部の幅の段差を乗り越える。
【００４１】
凹部の係合部が凸部の係合部に嵌入後は凹部の係合部の幅が弾性復元し、凹部の係合部と凸部の挿入部の幅の段差により係止することができ、固定テープ等を使わないコスト低減の効果が得られる。
【００４２】
また、凹部の係合部の幅を凸部の係合部の幅より小としたものである。
これにより、凸部と凹部の嵌入後、発泡性断熱材の弾性により凹部の係合部が凸部の係合部を両側で挟み込み、ダブルシールの効果となり、シール部材を必要としないコスト低減の効果が得られる。
【００４３】
また、凸部の挿入部の先端を丸くしたものである。
これにより、凸部の挿入部を嵌入時のガイドをなすと共に、弾性変形時のガイドになり、再組立のシール確保の効果が得られる。
【００４４】
また、凸部の係合部の付け根に設けた肉付け部と、凹部の係合部の根元に設けた傾斜部を設けたものである。
【００４５】
これにより、凸部の挿入部を嵌入時のガイドをなすと共に、再組立時の凸部の折れや欠け防止用の補強になり、再組立性の向上の効果が得られる。
【図面の簡単な説明】
【図１】本発明による冷蔵庫のダクトの水平分解断面図
【図２】同実施例の冷蔵庫のダクトの斜視図
【図３】本発明による冷蔵庫の縦断面図
【図４】従来の冷蔵庫のダクト部の縦断面図
【図５】従来の冷蔵庫のダクト部の水平分解断面図
【符号の説明】
１０冷気ダクト
２１凸部
２２凸部の挿入部
２３凸部の係合部
２４肉付け部
３１凹部
３２凹部の逃がし部
３３凹部の係合部
３４傾斜部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engagement specification of a foamable heat insulating material constituting a cold air duct of a refrigerator.
[0002]
[Prior art]
As conventional engagement specifications of the foamable heat insulating material constituting the cold air duct of the refrigerator, there are those disclosed in Japanese Patent Laid-Open Nos. 7-260316 and 4-78488.
[0003]
Hereinafter, the conventional refrigerator will be described with reference to the drawings.
FIG. 4 is a cross-sectional view of the engagement specification of the foamable heat insulating material constituting the cold air duct of the conventional refrigerator. In the figure, reference numeral 4 denotes a temperature control box disposed on the back of a refrigerator compartment 2 in which the interior is partitioned by a partition wall 1. The temperature control box 4 includes a decorative cover 5, a front foamable heat insulating material 6, a middle foamable heat insulating material 7, a rear foamable heat insulating material 8, and a cold air amount adjusting device 9 that adjusts the amount of cold air. Become.
[0004]
The front foamable heat insulating material 6, the middle foamable heat insulating material 7, and the rear foamable heat insulating material 8 constituting the cold air duct are formed with concave 6 a and 8 b and convex portions 7 a and 7 b, respectively. Yes.
[0005]
However, a gap is generated in the uneven fitting due to the variation due to the molding and the variation due to the multi-molding to cope with the increase in the quantity at the time of mass production. It is known that the gap seal for preventing cold air leakage by this is formed by a seal member 9 attached on the convex portion.
[0006]
It is also known to use a tape or the like to fix the respective foamable heat insulating materials 6, 7, and 8.
[0007]
FIG. 5 is an exploded horizontal sectional view of another conventional refrigerator air duct. In the figure, the cold air duct is constituted by foamable heat insulating materials 11 and 12, and is designed to be fitted at a convex portion 11a and a concave portion 12c provided on the foamable heat insulating materials 11 and 12. A protrusion 11b is provided on the side surface of the protrusion 11a. When the protrusion 11a is fitted in the recess 12c, the protrusion 11b is compressed and crushed to seal the gap.
[0008]
[Problems to be solved by the invention]
However, the above-described conventional configuration has a drawback in that it requires a seal member 9 for sealing a gap for preventing cold air leakage and a tape for fixing the foaming heat insulating materials 6, 7, and 8 to increase costs. .
[0009]
This invention solves the conventional subject, and it aims at providing the refrigerator aiming at the cost reduction of a cold air duct.
[0010]
Further, in the other conventional configuration, since the protruding portion 11b provided on the side surface of the convex portion 11a is compressed and sealed by compression, the sealing performance is unstable due to generation of a gap due to deformation of the protruding portion 11b during reassembly. Inadequate insertion due to compression resistance, there is a disadvantage of increasing the thickness of the duct, and the fixing of the foaming heat insulating materials 11 and 12 is not considered in terms of shape, and another fixing material is required, which has the disadvantage of increasing costs. It was.
[0011]
The present invention solves the problems of the prior art, ensuring sealing performance at the time of reassembly, ensuring the thickness of the duct, securing the foamable heat insulating material, and aiming to reduce the cost of the cold air duct. The object is to provide a refrigerator.
[0012]
[Means for Solving the Problems]
In order to achieve this object, in the present invention, a cold air duct is divided and formed with a foamable heat insulating material, and a protrusion and a concave portion for fitting are formed on the contact surface of the foamable heat insulating material. The insertion portion, the engagement portion, and the recess are made up of a relief portion and an engagement portion provided at the tip, and the width of the insertion portion of the projection is larger than the width of the engagement portion of the projection, and the relief portion of the recess The width of the insertion portion is larger than the width of the engaging portion of the concave portion, and the width of the insertion portion of the convex portion is larger than the width of the engaging portion of the concave portion.
[0013]
Further, the width of the engaging portion of the concave portion is made smaller than the width of the engaging portion of the convex portion.
[0014]
Further, the tip of the convex insertion portion is rounded.
Further, the invention is characterized in that a fleshing portion provided at the base of the engaging portion of the convex portion and an inclined portion provided at the base of the engaging portion of the concave portion are provided.
[0015]
Thereby, the sealing property at the time of reassembly is ensured, the thickness of the duct is ensured, and the foamable heat insulating material can be securely fixed, and the cost reduction effect of the cold air duct can be obtained.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a protrusion and a recess for fitting provided in a foamable heat insulating material that forms a cold air duct in a divided manner, wherein the protrusion is provided at an insertion portion of the protrusion and an engaging portion of the protrusion provided at the tip, and the recess is provided at the tip. The width of the insertion part of the convex part is larger than the width of the engagement part of the convex part, and the width of the relief part of the concave part is the width of the engagement part of the concave part. The width of the insertion portion of the convex portion is larger than the width of the engaging portion of the concave portion.
[0017]
For this reason, when the engaging portion of the concave portion provided in the foamable heat insulating material is fitted into the inserting portion of the convex portion, the width of the engaging portion of the concave portion is widened by the elasticity of the foaming heat insulating material, and the width of the inserting portion of the convex portion is increased. Get over the step.
[0018]
After the engaging part of the concave part is fitted into the engaging part of the convex part, the width of the engaging part of the concave part is elastically restored and can be locked by the step between the engaging part of the concave part and the insertion part of the convex part. The effect of cost reduction without using fixed tape can be obtained.
[0019]
Furthermore, the width of the engaging portion of the concave portion is made smaller than the width of the engaging portion of the convex portion.
[0020]
As a result, the engaging portion of the concave portion sandwiches the engaging portion of the convex portion on both sides due to the elasticity of the foam heat insulating material after the convex portion and the concave portion are fitted, thereby providing a double seal effect and reducing the cost without requiring a sealing member. An effect is obtained.
[0021]
Further, the tip of the convex insertion portion is rounded.
Thus, the insertion portion of the convex portion serves as a guide at the time of insertion, and also serves as a guide at the time of elastic deformation, so that an effect of securing a reassembly seal can be obtained.
[0022]
Further, a fleshing portion provided at the base of the engaging portion of the convex portion and an inclined portion provided at the base of the engaging portion of the concave portion are provided.
[0023]
Thus, the insertion portion of the convex portion serves as a guide when the convex portion is inserted, and also serves as a reinforcement for preventing the convex portion from being folded or chipped at the time of reassembly, thereby obtaining an effect of improving the reassembly property.
[0024]
【Example】
Embodiments of a refrigerator according to the present invention will be described below with reference to the drawings.
[0025]
1 is a horizontal exploded sectional view of a refrigerator duct according to an embodiment of the present invention, FIG. 2 is a perspective view, and FIG. 3 is a longitudinal sectional view of the refrigerator.
[0026]
In the figure, 1 is an outer box, 2 is an inner box, and a thermal insulation material 3 is foamed and filled between the two boxes. The interior of the compartment is partitioned by a partition wall 4 into a refrigerator compartment 5 located in the upper stage and a freezer compartment 6 located in the lower stage. Cold air that cools the refrigerator compartment 5 and the freezer compartment 6 is generated by the cooler 7 and supplied to each chamber by the blower 8.
[0027]
A damper thermo 9 for controlling the amount of cold air flowing into the refrigerator compartment 5 is disposed in a cold air duct 10 constituted by a front foamable heat insulating material 20 and a rear foamable heat insulating material 30. The cold air whose amount is controlled by the damper thermo 9 is blown out into the refrigerator compartment 5 from the cold air discharge hole 11 provided in the cold air duct 10.
[0028]
The front foamable heat insulating material 20 and the rear foamable heat insulating material 30 are respectively provided with a fitting convex portion 21 and a concave portion 31, and the convex portion 21 has a convex insertion portion 22 and a convex portion provided at the tip. The engaging portion 23 and the recessed portion 31 are constituted by a recessed portion relief portion 32 and a recessed portion engaging portion 33 provided at the tip.
[0029]
The width relationship among the insertion portion 22 of the convex portion, the engaging portion 23 of the convex portion, the relief portion 32 of the concave portion, and the engaging portion 33 of the concave portion is as follows.
[0030]
Recessed portion 32 of the concave portion ≧ inserted portion 22 of the convex portion
> Convex engaging part 23> Concave engaging part 33
Further, the cross-sectional shapes of the convex insertion portion 22 and the concave relief portion 32 are rounded, and the chamfered fleshing portion 24 provided at the base of the convex engagement portion 23 and the concave engagement portion 33 are provided. An inclined portion 34 provided at the base is provided.
[0031]
Regarding the cold air duct 10 of the refrigerator configured as described above, the assembly of the front foamable heat insulating material 20 and the rear foamable heat insulating material 30 is first performed with respect to the width of the convex insertion portion 22 and the concave engagement portion 33. The difference between the convex insertion portion 22> the concave engagement portion 33 is overcome by the elasticity of the foam heat insulating material.
[0032]
Thereafter, the convex insertion portion 22 is inserted up to the concave relief portion 32. The width of the engaging portion 33 of the concave portion and the engaging portion 23 of the convex portion is such that the engaging portion 23 of the convex portion> the engaging portion 33 of the concave portion, and the engaging portion 33 of the concave portion is the engaging portion of the convex portion. 23 will be inserted.
[0033]
Since the refrigerator of a present Example is comprised as mentioned above, there exists the following effect.
1) The width of the engaging portion 33 of the recessed portion and the engaging portion 23 of the projecting portion is such that the engaging portion 23 of the projecting portion> the engaging portion 33 of the recessed portion. Since the mating portion 23 is sandwiched, a double seal of the engaging portion 33 of the recessed portion can be formed on both sides of the engaging portion 23 of the protruding portion, and low cost that does not require a seal member can be realized.
[0034]
Moreover, since it is not set as the structure crushing by compression, while ensuring the sealing performance by reassembly, duct thickness can be ensured.
[0035]
In addition, the position of unevenness and the shape variation due to multiple molding to meet the need for foam molding and volume increase during mass production are specifications that can be fitted by the elasticity of the foam heat insulating material.
[0036]
2) The width of the engaging portion 33 of the recessed portion and the engaging portion 23 of the projecting portion is such that the engaging portion 23 of the projecting portion> the engaging portion 33 of the recessed portion. The relationship of sandwiching the joint portion 23 and the relationship between the insertion portion 22 of the convex portion and the engaging portion 33 of the concave portion after insertion are as follows. Thus, the front foamable heat insulating material 20 and the rear foamable heat insulating material 30 are prevented from coming off. For this reason, the low cost which does not require the fixing material of a foaming heat insulating material is realizable.
[0037]
3) The cross-sectional shape of the convex insertion portion 22 is rounded to become a guide shape at the time of insertion, which improves the insertion workability.
[0038]
4) Since the chamfered portion 24 is provided at the base of the engaging portion 23 of the convex portion, the engaging portion of the convex portion due to an external force when the engaging portion 33 of the concave portion is removed from the engaging portion 23 of the convex portion. 23 is prevented from breaking. Further, the inclined portion 34 provided at the base of the engaging portion 33 of the concave portion that becomes a relief after insertion of the chamfered portion 24 provided in the chamfered shape at the base of the engaging portion 23 of the convex portion is It becomes a guide shape at the time of insertion, and the insertion workability is improved.
[0039]
【The invention's effect】
As described above, in the present invention, in the protruding convex portion and the concave portion provided in the foamable heat insulating material forming the cold air duct, the convex portion is the convex insertion portion and the convex engaging portion provided at the tip, The concave portion is composed of a relief portion of the concave portion provided at the tip and an engagement portion of the concave portion, the width of the insertion portion of the convex portion is larger than the width of the engagement portion of the convex portion, and the width of the relief portion of the concave portion is It is larger than the width of the engaging portion, and the width of the insertion portion of the convex portion is larger than the width of the engaging portion of the concave portion.
[0040]
For this reason, when the engaging portion of the concave portion provided in the foamable heat insulating material is fitted into the inserting portion of the convex portion, the width of the engaging portion of the concave portion is widened by the elasticity of the foaming heat insulating material, and the width of the inserting portion of the convex portion is increased. Get over the step.
[0041]
After the engaging part of the concave part is fitted into the engaging part of the convex part, the width of the engaging part of the concave part is elastically restored and can be locked by the step between the engaging part of the concave part and the insertion part of the convex part. The effect of cost reduction without using fixed tape can be obtained.
[0042]
Further, the width of the engaging portion of the concave portion is made smaller than the width of the engaging portion of the convex portion.
As a result, the engaging portion of the concave portion sandwiches the engaging portion of the convex portion on both sides due to the elasticity of the foam heat insulating material after the convex portion and the concave portion are fitted, thereby providing a double seal effect and reducing the cost without requiring a sealing member. An effect is obtained.
[0043]
Further, the tip of the convex insertion portion is rounded.
Thus, the insertion portion of the convex portion serves as a guide at the time of insertion, and also serves as a guide at the time of elastic deformation, so that an effect of securing a reassembly seal can be obtained.
[0044]
Further, a fleshing portion provided at the base of the engaging portion of the convex portion and an inclined portion provided at the base of the engaging portion of the concave portion are provided.
[0045]
Thus, the insertion portion of the convex portion serves as a guide when the convex portion is inserted, and also serves as a reinforcement for preventing the convex portion from being folded or chipped at the time of reassembly, thereby obtaining an effect of improving the reassembly property.
[Brief description of the drawings]
FIG. 1 is a horizontal exploded sectional view of a refrigerator duct according to the present invention. FIG. 2 is a perspective view of a refrigerator duct of the same embodiment. FIG. 3 is a longitudinal sectional view of a refrigerator according to the present invention. Fig. 5 is a horizontal exploded sectional view of a duct part of a conventional refrigerator.
DESCRIPTION OF SYMBOLS 10 Cold air duct 21 Convex part 22 Convex part insertion part 23 Convex part engagement part 24 Filling part 31 Concave part 32 Concave part relief part 33 Concave part engagement part 34 Inclined part

Claims

The cold air duct is divided and formed with a foamable heat insulating material, and the convex part for fitting and the concave part are formed on the contact surface of the foamable heat insulating material. The convex part is the insertion part provided at the tip, the engaging part, and the concave part is It consists of a relief part and an engagement part provided at the tip, the width of the insertion part of the convex part is larger than the width of the engagement part of the convex part, and the width of the relief part of the concave part is the width of the engagement part of the concave part The width of the insertion part of the convex part is larger than the width of the engaging part of the concave part, and the width of the engaging part of the concave part is smaller than the width of the engaging part of the convex part, The refrigerator characterized in that the engaging portion of the concave portion sandwiches the engaging portion of the convex portion and seals the gap from the cold air duct by the elasticity of the foam heat insulating material after the concave portion is fitted .

2. The refrigerator according to claim 1, further comprising a fleshing portion provided at the base of the engaging portion of the convex portion and an inclined portion provided at the base of the engaging portion of the concave portion.