JP2004232880A - Refrigerator - Google Patents

Refrigerator Download PDF

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Publication number
JP2004232880A
JP2004232880A JP2003018483A JP2003018483A JP2004232880A JP 2004232880 A JP2004232880 A JP 2004232880A JP 2003018483 A JP2003018483 A JP 2003018483A JP 2003018483 A JP2003018483 A JP 2003018483A JP 2004232880 A JP2004232880 A JP 2004232880A
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Japan
Prior art keywords
accumulator
inlet pipe
pipe
compressor
oil return
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
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JP2003018483A
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Japanese (ja)
Inventor
Yuji Tsuchiya
祐二 土屋
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Fujitsu General Ltd
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Fujitsu General Ltd
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Publication date
Application filed by Fujitsu General Ltd filed Critical Fujitsu General Ltd
Priority to JP2003018483A priority Critical patent/JP2004232880A/en
Publication of JP2004232880A publication Critical patent/JP2004232880A/en
Abandoned legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator in which noise caused by flow of a refrigerant in an accumulator after a compressor is stopped is eliminated, the piping of an inlet pipe and an outlet pipe can be shortened to restrain cost increase, and a disposing space of the accumulator is reduced. <P>SOLUTION: An insertion position of the inlet pipe 10 to be inserted in the lower end of a hollow container 11a of the accumulator is arranged at the position above a center of the hollow container 11a so that comparing to the lower side space, the upper side space produced by dividing the inside of the hollow container with the inlet pipe 10 is smaller than the inside diameter of a bubble 14 of a gas refrigerant coming out of an oil returning part 10a of the inlet pipe 10 when the compressor is stopped, and the oil returning port 10a of the inlet pipe 10 is arranged to be oriented upwards. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は冷蔵庫に係わり、より詳細には、同冷蔵庫の冷凍サイクルを構成するアキュムレータでの音の発生を防止するための構造に関する。
【0002】
【従来の技術】
従来の冷蔵庫について、図1及び図4を参照しながら説明する。
図1は冷蔵庫の本体と、冷凍サイクルの構成部材の配置例を示したもので、本体1は外箱2と、内箱3と、これら両者間に充填された発泡断熱材4等で構成され、同本体1の下部後方に圧縮機5が配置され、前記内箱3内の上部に冷却器9が配置されている。前記圧縮機5の吐出側と前記冷却器9の入口との間に凝縮器を兼ねた放熱パイプ6、ドライヤ7、毛細管8を順次直列に接続して構成した高圧側配管を接続し、前記冷却器9の出口と前記圧縮機5の吸入側との間に、下端内部に油戻し孔10aを形成した入口管10を嵌挿し、上端内部に出口管12を嵌着したアキュムレータ11と、サクションパイプ13を順次直列に接続して構成した低圧側配管を接続して冷凍サイクルが形成されている。なお、前記サクションパイプ13に前記毛細管8は添設され、前記発泡断熱材4の中に埋設されている。
【0003】
前記アキュムレータ11は図4に示すような両側が円錐形をした円筒状の中空容器11aと、一端を前記冷却器9側に接続し、他端を前記中空容器11a内の中心線上に嵌挿した前記入口管(インナーパイプ)10と、一端を前記中空容器11a内の中心線上に嵌着し、他端を前記サクションパイプ13に接続する前記出口管12とからなり、前記冷却器9から前記アキュムレータ11内に流出した気液混合の冷媒を気層(ガス冷媒)と液層(液冷媒)とに分離して、液冷媒15を前記アキュムレータ11内に滞留させることにより、前記圧縮機5の液圧縮に伴う異常音の発生等を防止している。なお、前記入口管10の下部には油戻し孔10aがあり、冷媒中に混入した油(圧縮機5の潤滑油)が前記アキュムレータ11内に溜まるのを防止し、前記圧縮機5の起動時に、前記圧縮機5側(戻り配管)に戻している。
【0004】
そして、庫内が所定の冷却温度に達し、前記圧縮機5が停止すると、前記アキュムレータ11内に気液混合の冷媒が残留し、やがて、冷凍サイクルの圧力バランスにより前記冷却器9内にもこのガス冷媒と前記液冷媒15が流入する。前記アキュムレータ11の上部では内圧が上がり前記油戻し孔10aより前記冷却器9の最上部へ抜ける。また、流入したガス冷媒の体積が増し、圧力が上昇し、前記冷却器9の出口側の前記液冷媒15を入口管の先端開口部へ押し上げようとする。
【0005】
ガス層と液層に分離した状態は、前記入口管10の先端開口部の圧力と前記出口管12からの圧力との差が大きい時は、図4(C)に示すように、前記入口管10の先端開口部から前記アキュムレータ11内に噴出し、前記入口管10の先端開口部の圧力と前記出口管12からの圧力との差が小さい時は、図4(D)に示すように、前記液冷媒15を前記入口管10の先端開口部から押し出す圧力がかからず、ガス層と液層は前記油戻し孔10aより抜けることになる。その時にガス層が気泡14となって、前記油戻し孔10aから離れるときにボコボコという異音が外部に伝わり、騒音となる恐れがあった。
【0006】
これに対し、異音を低減させる一例として、図5は従来例における冷却器とアキュームレータの関係を示す正面図(A)とアキュームレータの縦断面図(B)であり、前記アキュムレータ11は縦方向に配置され、前記冷却器9と前記アキュムレータ11間に設けられた入口管10は、前記アキュムレータ11の上方部に接続され、前記アキュムレータ11と前記サクションパイプ13間に設けられた前記出口管12は、前記アキュムレータ11の下方部に接続されたので、前記圧縮機5が停止中に前記冷却器9で発生した気泡が前記アキュムレータ11内に溜まった前記液冷媒15中を通過して前記出口管へ流入することがないため、前記アキュムレータ11内で気泡によりボコボコという異音が外部に伝わり、騒音となる恐れを低減させている。(例えば、特許文献1参照)
【0007】
しかしながら、前記入口管10は、前記アキュムレータ11の上方部に接続され、また、前記出口管12は、前記アキュムレータ11の下方部に接続されるので、前記液冷媒15および冷媒中に混入した油(圧縮機5の潤滑油)が前記アキュムレータ11内に溜まり続ける恐れや、前記入口管10および前記出口管12の配管が長くなるため、接続用の配管が必要となる場合もあり、コストアップとなる。更に、前記アキュムレータ11の配置スペースも大きくなるという恐れのある問題を有していた。
【0008】
【特許文献1】
特開2002−5556号公報(第3ー4頁、第1図)
【発明が解決しようとする課題】
本発明においては、上記の問題点に鑑み、圧縮機の停止後に、アキュムレータの冷媒の流れに伴って発生する騒音を無くし、入口管および出口管の配管を短くでき、接続用の配管を必要とせずコストアップを抑え、更に、アキュムレータの配置スペースの縮小化を図るようにした冷蔵庫を提供することを目的としている。
【0009】
【課題を解決するための手段】
本発明は、上記問題点を解決するため、外箱と内箱との間に発泡断熱材を充填して本体を構成し、同本体の下部後方に圧縮機を配設し、前記内箱内に、冷媒の入口と出口とを備えた冷却器を配設し、前記圧縮機の吐出側と前記冷却器の入口間に凝縮器を兼ねた放熱パイプ、ドライヤ、毛細管等を接続して構成した高圧側配管を接続し、前記冷却器の出口と前記圧縮機の吸入側との間に、下端内部に油戻し孔を形成した入口管を嵌挿し、上端内部に出口管を嵌着したアキュムレータと、サクションパイプを接続して構成した低圧側配管を接続し、前記サクションパイプに前記毛細管を添設するとともに前記発泡断熱材の中に埋設してなる冷蔵庫において、
前記アキュムレータの内側と前記入口管の外側の空間を少なくともどちらか片方に寄せて、前記圧縮機が停止時、前記油戻し孔より出てくるガス冷媒の気泡の内径よりも小さくなるような位置に配置した構成となっている。
【0010】
前記アキュムレータの取付方向に傾斜を持たせた場合、前記アキュムレータの内側と前記入口管の外側の空間を片方に寄せて形成される狭い側を上方にして、前記アキュムレータを配置した構成となっている。
【0011】
前記入口管の油戻し孔を、前記アキュムレータの内側と前記入口管の外側の空間が狭い側に配置した構成となっている。
【0012】
前記アキュムレータの下端内部に嵌挿される前記入口管の下方に、液冷媒を一定量確保するための膨らみを持たせた液溜部を設けた構成となっている。
【0013】
前記アキュムレータと前記入口管とは平行するように形成した構成となっている。
【0014】
前記油戻し孔と対向する前記アキュムレータの内壁に、突起部を設けた構成となっている。
【0015】
前記アキュムレータの下部頂点部を、前記入口管の油戻し孔の位置より高い位置に設けた構成となっている。
【0016】
【発明の実施の形態】
以下、本発明の実施の形態を、添付図面に基づいた実施例として説明する。
なお、従来例と同じ部分の符号は同一とする。
図1は本発明による冷蔵庫の正面図(A)と、要部側断面図(B)であり、図2は本発明による冷却器とアキュムレータの関係を示す斜視図(A)と、正面図(B)であり、図3は本発明の一実施例を示すアキュムレータの縦断面図(A)と、要部拡大断面図(B)であり、本発明の実施例のガス冷媒の流れを示す要部拡大断面図(C)である。
【0017】
図において、図1は冷蔵庫の概略構成を示したもので、1は鋼板製の外箱2と、合成樹脂製の内箱3と、発泡断熱材4等からなる冷蔵庫の本体(断熱箱体ともいう)で、同本体1の下部後方に圧縮機5が配置され、前記内箱3内の上部に冷却器9が配置されている。また、前記圧縮機5と前記冷却器9との間に、凝縮器を兼ねた放熱パイプ6、ドライヤ7、毛細管8を順次直列に接続して構成した高圧側配管と、前記冷却器9の出口と前記圧縮機5の吸入側との間に、下端内部に油戻し孔10aを形成した入口管10を嵌挿し、上端内部に出口管12を嵌着したアキュムレータ11と、サクションパイプ13を順次直列に接続して構成した低圧側配管とが接続され、冷凍サイクルが形成されている。なお、前記サクションパイプ13と前記毛細管8は添設され、前記発泡断熱材4の中に埋設された状態になっている。
【0018】
図2及び図3(A)によって、本発明による前記冷却器9と前記アキュムレータ11の関係について説明する。
前記アキュムレータ11は前記冷却器9の一側上部に傾斜を持たせて配置されており、前記アキュムレータ11は従来の技術の図4でも説明したように、中空容器11aと、一端を前記冷却器9側に接続し、他端を前記中空容器11a内に嵌挿した前記入口管10と、一端を前記中空容器11a内に嵌着し、他端を前記サクションパイプ13に接続する前記出口管12とからなる。
【0019】
本発明による実施例を図3(B)で示すように、前記アキュムレータ11の中空容器11aの下端内部に嵌挿される前記入口管10の嵌挿される位置を、前記中空容器11aの中心より上方に寄せた位置、即ち、前記中空容器11a内を前記入口管10により分割された空間が、下方より上方側が、前記圧縮機5が停止時、前記入口管10の油戻し孔10aから出てくるガス冷媒の気泡14の内径よりも小さくなるような位置に配置するとともに、前記入口管10の油戻し孔10aを上向きに配置している。
【0020】
また、前記中空容器11aの下端内部に嵌挿される前記入口管10の下方には、液冷媒15を一定量確保するために、膨らみを持たせた液溜部16を設けている。
【0021】
前記中空容器11aの内側と前記入口管10の外側の空間が狭い側を上方に形成するとともに、前記入口管10の油戻し孔10aを上向きに配置することにより、図3(C)で示すように、前記入口管10の油戻し孔10aから出た気泡14は、前記中空容器11aの内側と前記入口管10の外側の空間が狭いため、出てきた前記気泡14の大きさが従来と同等かもしくはそれよりも大きいと、前記入口管10の油戻し孔10aから離れる前に前記中空容器11aの内側に触れることとなりボコ音は発生せず、前記気泡14は前記中空容器11aの内側を伝わって、徐々に小さくなり、気泡14が残って、液面で破裂する音も小さくなる。また、図3(D)で示すように、出てきた前記気泡14が小さいと、同気泡14の持つエネルギが小さく、ボコ音も小さくなる。従って、前記アキュムレータ11内で気泡によりボコボコという異音が外部に伝わり、騒音となる恐れを低減させている。
【0022】
なお、前記アキュムレータ11の取付方向に傾斜を持たせるのは、前記アキュムレータ11の取付スペースを少なくするためであり、前記アキュムレータ11の傾斜角度は、緩やかな方が本発明では有効であり、よりスペースの縮小化が図れる。
【0023】
また、前記アキュムレータ11の中空容器11aと前記入口管10とは平行するように形成した方が、前記中空容器11aの内側と前記入口管10の外側の空間をより小さくすることができ、音を低減させるには有効である。
【0024】
また、前記入口管10の油戻し孔10aに対向する前記中空容器11aの内側に、突起部17を設けると、発生した前記気泡14が同突起部17に先ず触れることになり、前記突起部17は気泡を分断して小さくするか、もしくは前記気泡14が前記中空容器11aの内側に伝わり易くする中継の役目を果たしている。
【0025】
また、前記アキュムレータ11の中空容器11aの下部頂点部11bを、前記入口管10の油戻し孔10aの位置より高い位置に設けることにより、冷媒中に混入した油(圧縮機5の潤滑油)が前記アキュムレータ11内に溜まるのを防止し、前記圧縮機5の起動時に、前記圧縮機5側(戻り配管)に戻すようにしている。
【0026】
上記構成において、前記冷却器9と前記アキュムレータ11の関係及び本発明の実施例について説明したが、このように前記アキュムレータ11の中空容器11aの下端内部に嵌挿される前記入口管10の位置を、前記中空容器11aの中心より上方に寄せた位置に形成するとともに、前記入口管10の油戻し孔10aを上向きに配置することにより、気泡発生時、前記入口管10の油戻し孔10aから出た気泡14は、前記中空容器11aの内側と前記入口管10の外側の空間が前記気泡14の内径より狭いため、出てきた前記気泡14が同等かそれよりも大きいと、前記入口管10の油戻し孔10aから離れる前に前記中空容器11aの内側に触れることとなりボコ音は発生しない、また、出てきた前記気泡14が小さいと、同気泡14の持つエネルギが小さく、ボコ音も小さくなる。従って、従来の冷蔵庫で問題となっていた前記アキュムレータ11内でのボコボコという音の発生を防止することができる。
【0027】
【発明の効果】
以上説明したように、本発明によれば、圧縮機の停止後に、アキュムレータの冷媒の流れに伴って発生する騒音を無くし、入口管および出口管の配管を短くでき、接続用の配管を必要とせずコストアップを抑え、更に、アキュムレータの配置スペースの縮小化を図るようにした冷蔵庫となる。
【図面の簡単な説明】
【図1】本発明及び従来例による冷蔵庫の正面図(A)と、要部側断面図(B)である。
【図2】本発明による冷却器とアキュムレータの関係を示す斜視図(A)と、正面図(B)である。
【図3】本発明の一実施例を示すアキュムレータの縦断面図(A)と、要部拡大断面図(B)であり、本発明の実施例のガス冷媒の流れを示す要部拡大断面図(C)および(D)である。
【図4】従来のアキュムレータの一例を示す縦断面図(A)と、要部拡大断面図(B)と、従来例のガス冷媒の流れを示す縦断面図(C)および(D)である。
【図5】他の従来例における冷却器とアキュムレータの関係を示す正面図(A)と、アキュムレータの縦断面図(B)である。
【符号の説明】
1 本体(断熱箱体)
2 外箱
3 内箱
4 発泡断熱材
5 圧縮機
6 放熱パイプ
7 ドライヤ
8 毛細管
9 冷却器
10 入口管
10a 油戻し孔
11 アキュムレータ
11a 中空容器
11b 下部頂点部
12 出口管
13 サクションパイプ
14 気泡(ガス冷媒)
15 液冷媒
16 液溜部
17 突起部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a refrigerator, and more particularly, to a structure for preventing generation of a sound in an accumulator constituting a refrigeration cycle of the refrigerator.
[0002]
[Prior art]
A conventional refrigerator will be described with reference to FIGS.
FIG. 1 shows an example of the arrangement of a refrigerator main body and components of a refrigeration cycle. The main body 1 is composed of an outer box 2, an inner box 3, and a foam insulation material 4 filled between the two. A compressor 5 is disposed at a lower rear portion of the main body 1, and a cooler 9 is disposed at an upper portion in the inner box 3. A high-pressure side pipe constituted by connecting a heat-radiating pipe 6, a dryer 7, and a capillary tube 8, which also serves as a condenser, in series between the discharge side of the compressor 5 and the inlet of the cooler 9 is connected, and the cooling is performed. An accumulator 11 having an inlet pipe 10 having an oil return hole 10a formed in the lower end thereof, and an outlet pipe 12 being fitted in the upper end thereof, between the outlet of the compressor 9 and the suction side of the compressor 5, and a suction pipe. 13 are connected in series to form a refrigeration cycle. The capillary tube 8 is attached to the suction pipe 13 and is buried in the foam insulation 4.
[0003]
The accumulator 11 has a cylindrical hollow container 11a having a conical shape on both sides as shown in FIG. 4, and one end connected to the cooler 9 side, and the other end fitted on a center line in the hollow container 11a. The inlet pipe (inner pipe) 10 and the outlet pipe 12 having one end fitted on a center line in the hollow container 11 a and the other end connected to the suction pipe 13. The refrigerant of the gas-liquid mixture flowing into the compressor 11 is separated into a gas layer (gas refrigerant) and a liquid layer (liquid refrigerant), and the liquid refrigerant 15 is retained in the accumulator 11 so that the liquid of the compressor 5 The generation of abnormal sounds due to compression is prevented. An oil return hole 10a is provided at a lower portion of the inlet pipe 10 to prevent oil (lubricating oil of the compressor 5) mixed in the refrigerant from accumulating in the accumulator 11, and when the compressor 5 is started. , To the compressor 5 side (return pipe).
[0004]
Then, when the inside of the refrigerator reaches a predetermined cooling temperature and the compressor 5 stops, the refrigerant of the gas-liquid mixture remains in the accumulator 11 and, eventually, the refrigerant in the cooler 9 due to the pressure balance of the refrigeration cycle. The gas refrigerant and the liquid refrigerant 15 flow. At the upper part of the accumulator 11, the internal pressure rises, and the oil passes through the oil return hole 10a to the uppermost part of the cooler 9. Further, the volume of the gas refrigerant that has flowed in increases, the pressure increases, and the liquid refrigerant 15 on the outlet side of the cooler 9 tries to be pushed up to the tip end opening of the inlet pipe.
[0005]
In the state of separation into the gas layer and the liquid layer, when the difference between the pressure at the opening at the tip end of the inlet pipe 10 and the pressure from the outlet pipe 12 is large, as shown in FIG. When the difference between the pressure at the distal opening of the inlet pipe 10 and the pressure from the outlet pipe 12 is small, as shown in FIG. No pressure is applied to push the liquid refrigerant 15 from the opening at the end of the inlet pipe 10, and the gas layer and the liquid layer pass through the oil return hole 10a. At that time, the gas layer becomes bubbles 14, and when the gas layer leaves the oil return hole 10a, an unusual noise is transmitted to the outside, which may cause noise.
[0006]
On the other hand, as an example of reducing abnormal noise, FIG. 5 is a front view (A) showing a relationship between a cooler and an accumulator in a conventional example and a longitudinal sectional view (B) of the accumulator, and the accumulator 11 is vertically oriented. An inlet pipe 10 arranged and provided between the cooler 9 and the accumulator 11 is connected to an upper part of the accumulator 11, and the outlet pipe 12 provided between the accumulator 11 and the suction pipe 13 is Since it is connected to the lower part of the accumulator 11, the air bubbles generated in the cooler 9 while the compressor 5 is stopped pass through the liquid refrigerant 15 accumulated in the accumulator 11 and flow into the outlet pipe. Therefore, it is possible to reduce the possibility that abnormal noise, which is generated by air bubbles in the accumulator 11, is transmitted to the outside by the air bubbles and the noise is generated. There. (For example, see Patent Document 1)
[0007]
However, since the inlet pipe 10 is connected to the upper part of the accumulator 11 and the outlet pipe 12 is connected to the lower part of the accumulator 11, the liquid refrigerant 15 and the oil mixed in the refrigerant ( Lubricating oil of the compressor 5) may continue to accumulate in the accumulator 11, and the piping of the inlet pipe 10 and the outlet pipe 12 may be long, so that connecting pipes may be required, which increases costs. . Further, there is a problem that the arrangement space of the accumulator 11 may be large.
[0008]
[Patent Document 1]
JP-A-2002-5556 (pages 3-4, FIG. 1)
[Problems to be solved by the invention]
In the present invention, in view of the above problems, it is possible to eliminate the noise generated due to the flow of the refrigerant in the accumulator after stopping the compressor, shorten the inlet and outlet pipes, and require connection pipes. It is another object of the present invention to provide a refrigerator that suppresses an increase in cost and further reduces an arrangement space of the accumulator.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention fills a foamed heat insulating material between an outer box and an inner box to form a main body, and arranges a compressor at a lower rear portion of the main body, and the inside of the inner box is In addition, a cooler having a refrigerant inlet and an outlet is provided, and a radiator pipe also serving as a condenser, a dryer, a capillary tube and the like are connected between the discharge side of the compressor and the inlet of the cooler. An accumulator in which a high pressure side pipe is connected, an inlet pipe having an oil return hole formed in the lower end thereof is inserted between the outlet of the cooler and the suction side of the compressor, and an outlet pipe is fitted in the upper end. In a refrigerator connected to a low-pressure side pipe configured by connecting a suction pipe, the capillary pipe is attached to the suction pipe and embedded in the foamed heat insulating material,
The space inside the accumulator and the space outside the inlet pipe are moved to at least one of them, and when the compressor is stopped, the space is smaller than the inner diameter of the gas refrigerant bubbles coming out of the oil return hole. The configuration is arranged.
[0010]
When the accumulator is inclined in the mounting direction, the accumulator is arranged with the narrow side formed by moving the space inside the accumulator and the space outside the inlet pipe to one side upward. .
[0011]
The oil return hole of the inlet pipe is arranged on the side where the space inside the accumulator and the space outside the inlet pipe are narrow.
[0012]
A liquid reservoir having a bulge for securing a fixed amount of liquid refrigerant is provided below the inlet pipe inserted into the lower end of the accumulator.
[0013]
The accumulator and the inlet pipe are configured to be parallel to each other.
[0014]
A configuration is such that a protrusion is provided on the inner wall of the accumulator facing the oil return hole.
[0015]
The lower apex portion of the accumulator is provided at a position higher than the position of the oil return hole of the inlet pipe.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described as examples based on the accompanying drawings.
The same reference numerals are used for the same parts as in the conventional example.
FIG. 1 is a front view (A) of a refrigerator according to the present invention and a sectional side view (B) of a main part, and FIG. 2 is a perspective view (A) showing a relationship between a cooler and an accumulator according to the present invention, and a front view ( B), and FIG. 3 is a longitudinal sectional view (A) of an accumulator showing an embodiment of the present invention and an enlarged sectional view (B) of an essential part, showing essential parts showing the flow of gas refrigerant in the embodiment of the present invention. It is a part enlarged sectional view (C).
[0017]
In the drawing, FIG. 1 shows a schematic configuration of a refrigerator, and 1 is a refrigerator main body (also referred to as a heat insulating box) including an outer box 2 made of a steel plate, an inner box 3 made of a synthetic resin, a foamed heat insulating material 4 and the like. ), A compressor 5 is disposed at a lower rear portion of the main body 1, and a cooler 9 is disposed at an upper portion in the inner box 3. A high-pressure side pipe formed by connecting a heat-radiating pipe 6 also serving as a condenser, a drier 7, and a capillary tube 8 in series between the compressor 5 and the cooler 9, and an outlet of the cooler 9. An inlet pipe 10 having an oil return hole 10a formed at the lower end thereof is inserted between the suction pipe and the suction side of the compressor 5, and an accumulator 11 having an outlet pipe 12 inserted at the upper end thereof, and a suction pipe 13 are sequentially connected in series. Is connected to a low-pressure-side pipe configured to form a refrigeration cycle. The suction pipe 13 and the capillary tube 8 are attached to each other and are buried in the foam insulation 4.
[0018]
The relationship between the cooler 9 and the accumulator 11 according to the present invention will be described with reference to FIGS.
The accumulator 11 is disposed at an upper portion of the cooler 9 with an inclination, and the accumulator 11 has a hollow container 11a and one end connected to the cooler 9 as described with reference to FIG. Side, the other end of which is inserted into the hollow vessel 11a, the inlet pipe 10; and the other end of the inlet pipe 10a, which is fitted into the hollow vessel 11a, and the other end thereof, which is connected to the suction pipe 13, and the outlet pipe 12. Consists of
[0019]
As shown in FIG. 3 (B), an embodiment according to the present invention is configured such that the position where the inlet pipe 10 is inserted into the lower end of the hollow container 11a of the accumulator 11 is inserted above the center of the hollow container 11a. The shifted position, that is, the space divided by the inlet pipe 10 in the hollow container 11a, the upper side from the lower side, the gas coming out of the oil return hole 10a of the inlet pipe 10 when the compressor 5 is stopped. The oil return hole 10a of the inlet pipe 10 is arranged upward while being arranged at a position smaller than the inner diameter of the air bubble 14 of the refrigerant.
[0020]
In addition, a swelled liquid reservoir 16 is provided below the inlet pipe 10 inserted into the lower end of the hollow container 11a in order to secure a fixed amount of the liquid refrigerant 15.
[0021]
By forming a narrow space above the space inside the hollow container 11a and outside the inlet pipe 10 and arranging the oil return hole 10a of the inlet pipe 10 upward, as shown in FIG. In addition, the size of the bubble 14 that has come out of the oil return hole 10a of the inlet pipe 10 is equal to that of the conventional bubble 14 because the space inside the hollow container 11a and the outside of the inlet pipe 10 are narrow. If it is greater than or larger than that, it will come into contact with the inside of the hollow container 11a before leaving the oil return hole 10a of the inlet pipe 10, and no humming sound will be generated, and the bubbles 14 will travel inside the hollow container 11a. As a result, the sound becomes gradually smaller, the bubbles 14 remain, and the sound of bursting at the liquid surface also becomes smaller. Also, as shown in FIG. 3D, when the bubble 14 that comes out is small, the energy of the bubble 14 is small, and the hum is also reduced. Therefore, the noise of the irregular sound transmitted to the outside due to the bubbles in the accumulator 11 is reduced.
[0022]
The reason why the accumulator 11 is inclined in the mounting direction is to reduce the mounting space of the accumulator 11, and a gentler inclination angle of the accumulator 11 is more effective in the present invention. Can be reduced.
[0023]
When the hollow container 11a of the accumulator 11 and the inlet pipe 10 are formed so as to be parallel, the space inside the hollow container 11a and the outside of the inlet pipe 10 can be made smaller, and the sound can be reduced. It is effective to reduce it.
[0024]
Also, if a projection 17 is provided inside the hollow container 11a facing the oil return hole 10a of the inlet pipe 10, the generated air bubble 14 comes into contact with the projection 17 first, and the projection 17 Serves as a relay for dividing the air bubbles to make them smaller or for facilitating the transmission of the air bubbles 14 to the inside of the hollow container 11a.
[0025]
By providing the lower apex portion 11b of the hollow container 11a of the accumulator 11 at a position higher than the position of the oil return hole 10a of the inlet pipe 10, oil mixed in the refrigerant (lubricating oil of the compressor 5) is reduced. The accumulation in the accumulator 11 is prevented, and the compressor 5 is returned to the compressor 5 side (return pipe) when the compressor 5 is started.
[0026]
In the above configuration, the relationship between the cooler 9 and the accumulator 11 and the embodiment of the present invention have been described. Thus, the position of the inlet pipe 10 inserted into the lower end of the hollow container 11a of the accumulator 11 is It is formed at a position higher than the center of the hollow container 11a, and the oil return hole 10a of the inlet pipe 10 is arranged upward, so that when air bubbles are generated, the oil returns from the oil return hole 10a of the inlet pipe 10. Since the space between the inside of the hollow container 11a and the outside of the inlet tube 10 is smaller than the inner diameter of the bubble 14, the bubbles 14 are oily in the inlet tube 10 when the bubbles 14 are equal or larger. Since the user touches the inside of the hollow container 11a before leaving the return hole 10a, no humming sound is generated. Less energy with is, is also reduced Thud sound. Therefore, it is possible to prevent the generation of a rattling sound in the accumulator 11, which is a problem in the conventional refrigerator.
[0027]
【The invention's effect】
As described above, according to the present invention, after the compressor is stopped, noise generated due to the flow of the refrigerant in the accumulator can be eliminated, the pipes of the inlet pipe and the outlet pipe can be shortened, and connection pipes are required. In addition, the refrigerator is designed to suppress the increase in cost and to reduce the space for disposing the accumulator.
[Brief description of the drawings]
FIG. 1A is a front view of a refrigerator according to the present invention and a conventional example, and FIG.
FIG. 2 is a perspective view (A) and a front view (B) showing a relationship between a cooler and an accumulator according to the present invention.
FIG. 3 is a longitudinal sectional view (A) of an accumulator showing an embodiment of the present invention, and an enlarged sectional view of a main part (B), showing an enlarged sectional view of a main part showing a flow of a gas refrigerant according to an embodiment of the present invention. (C) and (D).
FIG. 4 is a longitudinal sectional view (A) showing an example of a conventional accumulator, an enlarged sectional view of a main part (B), and longitudinal sectional views (C) and (D) showing a flow of a gas refrigerant in a conventional example. .
FIG. 5 is a front view (A) showing a relationship between a cooler and an accumulator in another conventional example, and a longitudinal sectional view (B) of the accumulator.
[Explanation of symbols]
1 body (insulated box)
2 Outer case 3 Inner case 4 Foam insulation 5 Compressor 6 Radiator pipe 7 Dryer 8 Capillary tube 9 Cooler 10 Inlet tube 10a Oil return hole 11 Accumulator 11a Hollow container 11b Lower apex 12 Outlet tube 13 Suction pipe 14 Bubbles (gas refrigerant) )
15 Liquid refrigerant 16 Liquid reservoir 17 Projection

Claims (7)

外箱と内箱との間に発泡断熱材を充填して本体を構成し、同本体の下部後方に圧縮機を配設し、前記内箱内に、冷媒の入口と出口とを備えた冷却器を配設し、前記圧縮機の吐出側と前記冷却器の入口間に凝縮器を兼ねた放熱パイプ、ドライヤ、毛細管等を接続して構成した高圧側配管を接続し、前記冷却器の出口と前記圧縮機の吸入側との間に、下端内部に油戻し孔を形成した入口管を嵌挿し、上端内部に出口管を嵌着したアキュムレータと、サクションパイプを接続して構成した低圧側配管を接続し、前記サクションパイプに前記毛細管を添設するとともに前記発泡断熱材の中に埋設してなる冷蔵庫において、
前記アキュムレータの内側と前記入口管の外側の空間を少なくともどちらか片方に寄せて、前記圧縮機が停止時、前記油戻し孔より出てくるガス冷媒の気泡の内径よりも小さくなるような位置に配置してなることを特徴とする冷蔵庫。
A foam body is filled between the outer box and the inner box to form a main body, a compressor is disposed at a lower rear portion of the main body, and a cooling unit having an inlet and an outlet for a refrigerant in the inner box. A high-pressure side pipe constituted by connecting a radiator pipe, a dryer and a capillary tube also serving as a condenser between the discharge side of the compressor and the inlet of the cooler is connected, and an outlet of the cooler is provided. An inlet pipe having an oil return hole formed in the lower end thereof, and an accumulator having an outlet pipe fitted in the upper end thereof, and a suction pipe connected to the suction side of the compressor. And a refrigerator having the capillary pipe attached to the suction pipe and embedded in the foamed heat insulating material,
The space inside the accumulator and the space outside the inlet pipe are moved to at least one of them, and when the compressor is stopped, the space is smaller than the inner diameter of the gas refrigerant bubbles coming out of the oil return hole. A refrigerator characterized by being arranged.
前記アキュムレータの取付方向に傾斜を持たせた場合、前記アキュムレータの内側と前記入口管の外側の空間を片方に寄せて形成される狭い側を上方にして、前記アキュムレータを配置してなることを特徴とする請求項1記載の冷蔵庫。When the accumulator is inclined in the mounting direction, the accumulator is arranged such that a narrow side formed by bringing the space inside the accumulator and the space outside the inlet pipe to one side is directed upward. The refrigerator according to claim 1, wherein 前記入口管の油戻し孔を、前記アキュムレータの内側と前記入口管の外側の空間が狭い側に配置してなることを特徴とする請求項1記載の冷蔵庫。2. The refrigerator according to claim 1, wherein the oil return hole of the inlet pipe is arranged on a side where the space inside the accumulator and the space outside the inlet pipe are narrower. 3. 前記アキュムレータの下端内部に嵌挿される前記入口管の下方に、液冷媒を一定量確保するための膨らみを持たせた液溜部を設けてなることを特徴とする請求項1記載の冷蔵庫。2. The refrigerator according to claim 1, further comprising a bulged liquid reservoir for securing a fixed amount of liquid refrigerant below the inlet tube inserted into the lower end of the accumulator. 前記アキュムレータと前記入口管とは平行するように形成してなることを特徴とする請求項1乃至請求項4記載の冷蔵庫。5. The refrigerator according to claim 1, wherein the accumulator and the inlet pipe are formed so as to be parallel. 前記油戻し孔と対向する前記アキュムレータの内壁に、突起部を設けてなることを特徴とする請求項1乃至請求項5記載の冷蔵庫。The refrigerator according to any one of claims 1 to 5, wherein a protrusion is provided on an inner wall of the accumulator facing the oil return hole. 前記アキュムレータの下部頂点部を、前記入口管の油戻し孔の位置より高い位置に設けてなることを特徴とする請求項1乃至請求項6記載の冷蔵庫。7. The refrigerator according to claim 1, wherein a lower apex of the accumulator is provided at a position higher than a position of an oil return hole of the inlet pipe.
JP2003018483A 2003-01-28 2003-01-28 Refrigerator Abandoned JP2004232880A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102927724A (en) * 2012-11-26 2013-02-13 合肥华凌股份有限公司 Evaporator component for refrigerating equipment and refrigerating equipment with same
WO2016136545A1 (en) * 2015-02-26 2016-09-01 シャープ株式会社 Refrigerator
JP2018155485A (en) * 2017-03-17 2018-10-04 日冷工業株式会社 Gas-liquid separation device and refrigeration device including gas-liquid separation device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102927724A (en) * 2012-11-26 2013-02-13 合肥华凌股份有限公司 Evaporator component for refrigerating equipment and refrigerating equipment with same
WO2016136545A1 (en) * 2015-02-26 2016-09-01 シャープ株式会社 Refrigerator
JP2016156597A (en) * 2015-02-26 2016-09-01 シャープ株式会社 Refrigerator
JP2018155485A (en) * 2017-03-17 2018-10-04 日冷工業株式会社 Gas-liquid separation device and refrigeration device including gas-liquid separation device
JP7146207B2 (en) 2017-03-17 2022-10-04 日冷工業株式会社 Refrigeration equipment with gas-liquid separator and gas-liquid separator

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