JP3946611B2 - refrigerator - Google Patents

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Publication number
JP3946611B2
JP3946611B2 JP2002293954A JP2002293954A JP3946611B2 JP 3946611 B2 JP3946611 B2 JP 3946611B2 JP 2002293954 A JP2002293954 A JP 2002293954A JP 2002293954 A JP2002293954 A JP 2002293954A JP 3946611 B2 JP3946611 B2 JP 3946611B2
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Prior art keywords
compressor
refrigerator
suction pipe
refrigeration cycle
machine room
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JP2004125353A (en
Inventor
稔 天明
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Toshiba Corp
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Toshiba Corp
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Priority to JP2002293954A priority Critical patent/JP3946611B2/en
Priority to TW092123523A priority patent/TWI245873B/en
Priority to EP03799145A priority patent/EP1557623B1/en
Priority to PCT/JP2003/012374 priority patent/WO2004031666A1/en
Priority to DE60330175T priority patent/DE60330175D1/en
Priority to CNB038237792A priority patent/CN100439826C/en
Priority to KR1020057005616A priority patent/KR20050054982A/en
Publication of JP2004125353A publication Critical patent/JP2004125353A/en
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Publication of JP3946611B2 publication Critical patent/JP3946611B2/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00General constructional features
    • F25D23/006General constructional features for mounting refrigerating machinery components
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D19/00Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00General constructional features
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/12Inflammable refrigerants
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2400/00General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/24Protection against refrigerant explosions
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2400/00General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/32Removal, transportation or shipping of refrigerating devices from one location to another

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は冷蔵庫に係り、特に炭化水素系冷媒を使用した冷凍サイクルにおける機械室の配管構成に関する。
【0002】
【従来の技術】
近年、環境問題を契機として家電製品のリサイクル化が進行しており、廃棄する場合の分解や破砕、素材毎の選別処理がおこなわれている。
【0003】
冷蔵庫の場合は、図5に示すように、外面から比較的容易に取り外せる部材を除去するとともに、冷媒圧縮機は配管を切断して本体から取り外し、その後、キャビネット全体を破砕処理してウレタン断熱材や金属など素材毎に選別する方法が採用されている。取り外された冷媒圧縮機は、ケース下面に設けた油抜き穴などから冷凍機油を抜き出した後、これを破砕して鉄、銅など材質毎に選別されるが、キャビネット内の冷却器や冷媒配管はキャビネットとともに破砕され、その後選別される。
【0004】
また冷蔵庫における冷凍サイクル中の冷媒は、フロンガスによるオゾン層破壊や地球温暖化問題に対応するため、従来使用されていたハイドロフルオロカーボン(HFC)から、オゾン層の破壊がなく、地球温暖化係数の低いイソブタン(R600a)など炭化水素系冷媒(以下、「HC冷媒」という。)への切換え採用が進んでいる。
【0005】
このHC冷媒、例えばイソブタンは、図6に示す圧縮機の冷凍機油に対する溶け込み量を表す曲線から明らかなように、溶解度が高く、特に低温域において非常に高くなる特性を有している。また、HC冷媒は可燃性冷媒であることから、冷媒漏れを生じた場合には火花などで引火し火災に発展する可能性がある。
【0006】
したがって、HC冷媒を使用する場合は、冷蔵庫の製造時の不具合や搬送時における衝撃によって、たとえ冷媒漏れが発生したとしても、火災などの問題のない安全性を確保する必要があり、冷却器の入口と出口に温度センサーあるいは圧力センサーを配置して、双方の温度差あるいは圧力差とあらかじめ設定記憶された値との比較から冷媒漏れの有無を判断する構成(例えば、特許文献1参照。)や、冷却器周辺に冷媒漏れ検出機器を設け、冷媒漏れの際には除霜水の排水を兼ねた連通孔を通して漏れた冷媒を空気とともに強制的に外部に排出する構成(特許文献2参照。)などが考えられている。
【0007】
【特許文献1】
特開平9−14811号
【0008】
【特許文献2】
特開平9−329386号
【0009】
【発明が解決しようとする課題】
しかしながら、冷蔵庫をリサイクル処理する場合は、販売時や使用中における移送形態とは相違して、正規の直立状態以外、すなわち横倒しなどの状態で積み上げ、保管あるいは運搬されることが多く、そのため、通常はレシプロタイプである圧縮機(69)内の下部に溜まった状態にある冷凍機油が冷凍サイクルの配管である吸込みパイプ(75)を通じてキャビネット(1)側の配管中に流入する可能性がある。
【0010】
従来の機械室構成である図7に示すように、図示しない冷却器から機械室内に導出された吸込みパイプ(75)はその端部が圧縮機(69)に接続されているが、冷蔵庫を横倒しした場合、吸込みパイプ(75)の導出側である図中の左側を上方にした場合は圧縮機からの冷凍機油の流出はないが、逆に導出側を下方にして横倒しされた場合は、圧縮機(69)内の冷凍機油は重力によって下方に流下し、吸込みパイプ(75)を通じてから冷却器などキャビネット本体(61)内の配管中に流れ込むことになる。
【0011】
リサイクル処理される前の冷蔵庫は、屋外で保管される場合も多く、特に冬季はキャビネットの温度が低下することになり、上述したごとく、低温において冷凍機油中への溶け込み量がきわめて多くなるHC冷媒は冷凍機油とともに大量にキャビネット本体内に流れ込むことになる。
【0012】
上記状態において、キャビネット本体を破砕処理した場合は、破砕された冷凍サイクルの種々の配管から冷凍機油が流出し、冷凍機油から多量の可燃性冷媒であるHC冷媒が湧き出ることになり、引火する危険性が高くなる問題があった。
【0013】
本発明は、以上の点を考慮してなされたものであり、可燃性冷媒を使用した冷蔵庫において、リサイクルのために冷蔵庫を横倒し状態で保管や運搬がなされても、圧縮機内の冷凍機油がキャビネット内に流入することのない構成とし、冷凍機油中のHC冷媒の発火の恐れをなくした冷蔵庫を提供するものである。
【0014】
【課題を解決するための手段】
上記課題を解決するため、請求項1記載の冷蔵庫は、可燃性冷媒を使用したレシプロタイプ圧縮機と凝縮器と絞り装置および冷却器からなる冷凍サイクルと、断熱箱本体の下部に形成され、圧縮機を設置するとともに本体内における前記冷凍サイクル部品から導出して前記圧縮機の低圧ケース内に接続させた吸込み配管を配置した機械室とを有し、庫内から機械室への導出部と圧縮機面に形成した接続部との間を接続する前記吸込み配管の一部を、立設状態における圧縮機の幅方向に重合するようU字状に延設させるとともに、圧縮機の背面より前方へのU字状延出部を設けて配設させたことを特徴とするものである。
【0015】
この構成により、リサイクル処理などのため冷蔵庫が直立姿勢以外の横倒しや傾斜状態で運搬、保管されても、圧縮機中の冷凍機油がキャビネット側へ流入することを防ぐことが可能となり、冷凍機油中に溶け込んだHC冷媒による発火の可能性を少なくすることができる。
【0016】
請求項2記載の発明は、可燃性冷媒を使用したレシプロタイプ圧縮機と凝縮器と絞り装置および冷却器からなる冷凍サイクルと、断熱箱本体の下部に形成され、圧縮機を設置するとともに本体内における前記冷凍サイクル部品から導出して前記圧縮機の低圧ケース内に接続させた吸込み配管を配置した機械室とを有し、機械室への導出部とこの導出部側の圧縮機面に形成した接続部との間を接続する前記吸込み配管の一部を、圧縮機の幅方向に重合するようU字状に延設してトラップ部を設けるとともに、その端部に圧縮機の背面より前方へ延びるトラップを形成したことを特徴とするものであり、請求項3記載の発明は、可燃性冷媒を使用したレシプロタイプ圧縮機と凝縮器と絞り装置および冷却器からなる冷凍サイクルと、断熱箱本体の下部に形成され、圧縮機を設置するとともに本体内における前記冷凍サイクル部品から導出して前記圧縮機の低圧ケース内に接続させた吸込み配管を配置した機械室とを有し、機械室への導出部とこの導出部とは反対側の圧縮機面に形成した接続部との間を接続する前記吸込み配管の一部に、圧縮機の背面より前方へ延びるトラップを形成したものであり、この構成によるトラップによって、簡単な構成で圧縮機からキャビネット側への冷凍機油の流れ込みを防ぐことができる。
【0017】
請求項4記載の発明は、接続する配管は、その少なくとも一部を圧縮機幅のほぼ中央部を経由させたこと特徴とするものであり、より簡素で標準化された配管構成により、圧縮機からキャビネット側への冷凍機油の流れ込みを防ぐことができる。
【0018】
請求項5記載の発明は、可燃性冷媒を使用したレシプロタイプ圧縮機と凝縮器と絞り装置および冷却器からなる冷凍サイクルと、断熱箱本体の下部に形成され、圧縮機を設置するとともに本体内における前記冷凍サイクル部品から導出して前記圧縮機の低圧ケース内に接続させた吸込み配管を配置した機械室とを有し、圧縮機に接続した吸込みパイプに設けた逆止弁の比重を冷凍機油より重くしたことを特徴とするものであり、吸込みパイプに設けた逆止弁の比重を考慮することで、より簡単にキャビネット側への冷凍機油の流れ込みを抑制することができる。
【0019】
【発明の実施の形態】
以下、図面に基づき本発明の一実施形態について説明する。図1は、冷蔵庫の機械室を後方から見た状態を示す斜視図である。機械室(2)は断熱箱体からなるキャビネット本体(1)の後方下部設けられており、外箱後板(3)の下方に傾斜状の底板(4)と左右側板(5)(6)および底面を形成するコンプ台(7)により区画形成されている。
【0020】
この機械室(2)を形成するコンプ台(7)上には、クッション体(8)を介して圧縮機(9)を設置している。圧縮機(9)は、冷凍サイクルの一環をなし、冷媒を吐出パイプ(10)から吐出し、前記外箱後板(3)や側板(5)(6)の裏面、本体底面に配設した放熱パイプからなる凝縮器(11)および絞り装置(12)などを経由して、キャビネット内に配置した図示しない冷却器に導入し冷却作用をおこなうものであり、ロータリータイプのものも存在するが、現在では主に低圧ケースであるレシプロタイプが多く採用されている。
【0021】
冷却器で冷却作用をおこない蒸発した気化冷媒を圧縮機(9)へ戻す吸込みパイプ(15)は外箱後板(3)の下端側部から機械室(2)に導出され、この吸込みパイプ(15)の導出側の圧縮機(9)のケース面に形成した吸込部(9a)に直接接続されている。
【0022】
このとき、吸込みパイプ(15)は、機械室(2)への導出部(15a)から垂下させた後、圧縮機(9)の幅方向のほぼ中央位置まで重合するよう延設させUターンさせることによりトラップ部(15b)を設けており、さらにその端部は、前記導出部(15a)と圧縮機(2)との間の空間部において圧縮機の背面より前方に向かって、これも前記と同様圧縮機の奥行き寸法のほぼ中央位置まで延長してUターンさせた第2のトラップ(15c)を形成し、その先端を前記圧縮機(9)の吸込み部(9a)に接続している。
【0023】
なお、このとき、吸込み部(9a)は、図1のように圧縮機ケースの側面でなくとも外形が円形であるケース(9d)の背面部に設けてもよい。
【0024】
図2は、レシプロタイプ圧縮機の概略断面構成であり、冷蔵庫の通常の立設状態では吐出パイプ(10)や吸込みパイプ(15)、モーター(9b)、圧縮シリンダ(9c)に対して、冷凍機油(16)は図示の状態で圧縮機(9)のケース(9e)内に封入されている。
【0025】
上記配管構成により、冷蔵庫を横倒しや傾斜状態、例えば、吸込みパイプ(15)の機械室(2)への導出側、すなわち図1におけるキャビネット本体(1)の左側板(5)を下面として倒した場合は、圧縮機(9)内の冷凍機油(16)は重力より吸込みパイプ(15)内に流出するが、吸込みパイプ(15)はその後圧縮機側の幅方向のほほ中央部近傍まで延出してUターンしているため、横倒し状態における吸込みパイプ(15)の上端は、圧縮機内に溜まっている冷凍機油の油面より高い位置となり、Uターン部分はトラップ部(15b)となって、冷凍機油のキャビネット本体(1)側への流入を阻止するものである。
【0026】
また、キャビネット背面(3)を下面として倒した場合は、圧縮機(9)の前方に向かって、奥行き寸法のほぼ中央位置まで延出してUターンさせた第2のトラップ(15c)により、吸込みパイプ(15)の上端は圧縮機内の冷凍機油の油面より高くなって、トラップ(15c)以降の冷凍機油のキャビネット本体(1)側への逆流を阻止することになる。
【0027】
なお、吸込みパイプの機械室(2)への導出部(15a)とは反対側、すなわち図1におけるキャビネットの右側板(6)を下方として倒した場合は、吸込みパイプの導出部(15a)は圧縮機(9)より上部位置となり、圧縮機内の冷凍機油はキャビネット本体(1)に流れ込むことはない。
【0028】
そしてなお、キャビネット本体(1)の前面側を下方として倒した場合や、キャビネット本体の上面を下方としたいわゆる逆立ち状態の場合は、圧縮機(9)面における吸込みパイプ(15)の接続位置が前記各々の方向に対する圧縮機寸法の中心位置より上方に位置することとなり、冷凍機油の油面より高い位置となるので、油が圧縮機(9)内から流出することはない。
【0029】
また、前記実施例であるレシプロタイプ圧縮機の場合、吐出パイプ(10)は、圧縮機(9)内においてシリンダ(9c)、ピストン(9d)に繋がっており、キャビネット本体(1)が横倒しとなっても吐出パイプから冷凍機油が流出することはない。
【0030】
図1と同一部分に同一符号を附した図3は、吸込みパイプ(35)を、前記実施例とは逆に、外箱後板(3)の下端側部から機械室(2)に導出した後、この吸込みパイプ(35)の導出側とは反対側の圧縮機(29)のケース面に形成した吸込み部(29a)に接続したタイプの実施例であり、この吸込みパイプ(35)は、機械室(2)への導出部(35a)から垂下させた後、導出部(35a)と圧縮機(29)との間の空間部で、圧縮機の背面より前方に向かって、圧縮機の奥行き寸法のほぼ中央位置まで延長してUターンさせたトラップ(35c)を形成し、さらに、端部を前記圧縮機(29)の後方を通過して反対側まで延出した後に前記吸込み部(29a)に接続している。
【0031】
上記配管構成により、冷蔵庫を横倒し、例えば図3におけるキャビネットの左側の側面(5)を下方として倒した場合は、圧縮機(29)への吸込みパイプ(35)の接続部は圧縮機の上方となるため、ここから冷凍機油が圧縮機の外方に洩れ出ることはなく、また右側(6)を下方とした場合は、吸込み部(29a)が下方に位置するため冷凍機油は圧縮機下方の吸込みパイプ(35)部分までは流出するが、圧縮機(29)の上部まで流出することはなく、キャビネット本体(1)内に流入することはない。
【0032】
また、キャビネット背面(3)を下方として倒した場合は、前記実施例と同様に、圧縮機の前方に向かって、奥行き寸法のほぼ中央位置まで延出してUターンさせたトラップ(35c)により、吸込みパイプ(35)の上端は圧縮機(29)内の冷凍機油の油面より高くなって、トラップ(35c)以降の冷凍機油の逆流を阻止し、キャビネット(1)内への流入を防ぐことになる。
【0033】
なお、キャビネット本体の前面側を下方として倒した場合や、キャビネット本体の上面を下方としたいわゆる逆立ち状態の場合は、前記実施例と同じ理由により、冷凍機油が圧縮機内から流出することはない。
【0034】
以上は、レシプロタイプについての例であり、ロータリータイプの圧縮機の場合は、高圧ケースであることから前述のごとく、冷凍機油に対するHC冷媒の溶け込み量が増大する可能性が大きくなるが、構成としては、特に図示しないが、吸込みパイプが圧縮機のシリンダに繋がり、シリンダからの吐出冷媒ガスは圧縮機のケース内に吐出され、吐出パイプから流出する。これはその他の形態の高圧ケースの圧縮機においても同様である。
【0036】
次に、本発明の他の実施形態を説明する。前記実施例と同一部分に同一符号を附した冷蔵庫の機械室部の斜視図である図4に示すように、レシプロタイプ圧縮機(49)への吸込みパイプ(55)に逆止弁(55a)を設けるとともに、この逆止弁(55a)における弁体の比重を冷凍機油より重くしたものである。
【0037】
逆止弁(55a)は元来圧縮機(49)から吸込みパイプ(55)側への冷媒の逆流を防止するものであるが、前述の破砕処理時の保管や移送の際に、冷蔵庫を横倒しにした際には、圧縮機面の下方に吸込みパイプ(55)の接続部が位置する可能性もあり、このとき、逆止弁(55a)の比重が冷凍機油より小さい場合は、浮力により弁体が浮き上がり弁を閉じることができなくなる。これを防止するため、弁体の比重を冷凍機油より大きくすることにより、キャビネット本体がどのような方向に横倒しとなっても圧縮機から吸込みパイプへの冷凍機油の流出を防ぐことができる。
【0038】
【発明の効果】
以上説明したように、本発明の冷蔵庫によれば、リサイクルのための分解や破砕処理に際し、冷蔵庫を正規の直立状態ではなく、横倒しや傾斜状態で積み重ねられて屋外に保管されたり、運搬されたりした場合でも、機械室への導出部とレシプロタイプ圧縮機面に形成した配管との間を接続する吸込み配管の一部を、冷蔵庫本体が左右側面および背面を下方にして横倒し状態になった際の圧縮機中の冷凍機油の油面より上方になるように配置することができ、破砕処理した際に、破砕されたキャビネット本体内の配管からの冷凍機油の流出を防いで、冷凍機油に溶け込んだ可燃性冷媒が湧き出ることを防ぎ、何らかの条件で引火する危険性を防止することができる。
【図面の簡単な説明】
【図1】本発明の1実施形態を示す冷蔵庫の機械室部の斜視図である。
【図2】圧縮機の概略構成を示す断面図である。
【図3】本発明の他の実施例を示す図1と同一部分の斜視図である。
【図4】本発明の他の実施形態を示す冷蔵庫機械室部分の斜視図である。
【図5】冷蔵庫のリサイクル時の破砕選別構成を示す説明図である。
【図6】HC冷媒の冷凍機油中への溶け込み量の変化を示すグラフである。
【図7】従来構成を示す図1と同一部分の機械室の斜視図である
【符号の説明】
1…キャビネット本体 2…機械室 3…外箱後板
5…左側板 6…右側板 7…コンプ台
9、29、49…圧縮機 9a、29a…吸込み部
10…吐出パイプ 15、35、55…吸込みパイプ
15a、35a…導出部 15b…トラップ部
15c、35c…トラップ 16…冷凍機油 17…低温側絞り装置
18…高温側絞り装置 55a…逆止弁
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerator, and more particularly to a piping configuration of a machine room in a refrigeration cycle using a hydrocarbon-based refrigerant.
[0002]
[Prior art]
In recent years, household appliances have been recycled due to environmental problems, and decomposition and crushing when discarding and sorting processing for each material are performed.
[0003]
In the case of a refrigerator, as shown in FIG. 5, while removing a member that can be removed relatively easily from the outer surface, the refrigerant compressor cuts the pipe and removes it from the main body, and then crushes the entire cabinet to make a urethane heat insulating material. A method of sorting by material such as metal or metal is adopted. The removed refrigerant compressor, after extracting the refrigeration oil from the oil drain hole provided on the lower surface of the case, is crushed and sorted by material such as iron, copper, etc. Are crushed together with the cabinet and then sorted.
[0004]
In addition, the refrigerant in the refrigeration cycle in the refrigerator has a low global warming potential because there is no destruction of the ozone layer from hydrofluorocarbons (HFCs) that have been used in the past in order to deal with ozone layer destruction and global warming problems caused by CFCs. Switching to hydrocarbon-based refrigerants (hereinafter referred to as “HC refrigerants”) such as isobutane (R600a) is progressing.
[0005]
This HC refrigerant, for example, isobutane, has a characteristic that it has a high solubility, particularly in a low temperature range, as is apparent from the curve representing the amount of penetration of the compressor into the refrigerating machine oil shown in FIG. Further, since the HC refrigerant is a flammable refrigerant, if a refrigerant leak occurs, it may be ignited by a spark or the like to develop a fire.
[0006]
Therefore, when using HC refrigerant, it is necessary to ensure safety without problems such as fire even if refrigerant leakage occurs due to problems during manufacture of the refrigerator or impact during transportation. A configuration in which temperature sensors or pressure sensors are arranged at the inlet and the outlet, and the presence or absence of refrigerant leakage is determined from comparison between the temperature difference or pressure difference between the two and a preset value stored (for example, see Patent Document 1). In addition, a refrigerant leak detection device is provided around the cooler, and in the event of refrigerant leakage, the refrigerant leaking through the communication hole that also serves as drainage of defrost water is forcibly discharged together with air (see Patent Document 2). Etc. are considered.
[0007]
[Patent Document 1]
JP-A-9-14811
[Patent Document 2]
JP-A-9-329386
[Problems to be solved by the invention]
However, when recycling the refrigerator, it is often stacked, stored or transported in a state other than the normal upright state, that is, in a lying state, unlike the transfer form at the time of sale or in use. There is a possibility that the refrigerating machine oil accumulated in the lower part of the reciprocating type compressor (69) flows into the cabinet (1) side pipe through the suction pipe (75) which is the pipe of the refrigeration cycle.
[0010]
As shown in FIG. 7, which is a conventional machine room configuration, the suction pipe (75) led out from the cooler (not shown) to the machine room is connected to the compressor (69) at its end, but the refrigerator is laid sideways. If the left side in the figure, which is the outlet side of the suction pipe (75), is upward, there will be no refrigeration oil outflow from the compressor. The refrigerating machine oil in the machine (69) flows down due to gravity and flows into the piping in the cabinet body (61) such as a cooler through the suction pipe (75).
[0011]
Refrigerators that are not recycled are often stored outdoors, especially in winter, where the temperature of the cabinet decreases, and as described above, the amount of HC refrigerant that melts into refrigeration oil at a low temperature is extremely high. Will flow into the cabinet body in large quantities along with the refrigerator oil.
[0012]
In the above state, when the cabinet body is crushed, the refrigeration oil flows out from various pipes of the crushed refrigeration cycle, and a large amount of HC refrigerant, which is a flammable refrigerant, springs out from the refrigeration oil. There was a problem of increasing the nature.
[0013]
The present invention has been made in consideration of the above points, and in a refrigerator using a flammable refrigerant, the refrigerator oil in the compressor remains in the cabinet even if the refrigerator is stored and transported in a laid-down state for recycling. Provided is a refrigerator that does not flow into the refrigerator and eliminates the risk of ignition of HC refrigerant in the refrigerating machine oil.
[0014]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the refrigerator according to claim 1 is formed at a lower portion of a heat insulation box main body, a refrigeration cycle including a reciprocating type compressor using a flammable refrigerant, a condenser, a throttling device, and a cooler. And a machine room in which a suction pipe led out from the refrigeration cycle parts in the main body and connected to the low pressure case of the compressor is arranged, and the lead-out part and the compression from the inside to the machine room A part of the suction pipe connected to the connection portion formed on the machine surface is extended in a U shape so as to overlap in the width direction of the compressor in the standing state, and forward from the back surface of the compressor The U-shaped extending portion is provided and disposed.
[0015]
With this configuration, it becomes possible to prevent the refrigerator oil in the compressor from flowing into the cabinet side even if the refrigerator is transported and stored in a sideways or inclined state other than an upright position for recycling processing, etc. The possibility of ignition by the HC refrigerant dissolved in the refrigerant can be reduced.
[0016]
The invention described in claim 2 is formed in a refrigerating cycle comprising a reciprocating type compressor using a flammable refrigerant, a condenser, a throttling device, and a cooler, and a lower part of a heat insulating box main body. And a machine room in which a suction pipe led out from the refrigeration cycle parts and connected to the low pressure case of the compressor is disposed, and formed on the lead-out part to the machine room and the compressor surface on the lead-out part side A part of the suction pipe connected to the connection part is extended in a U shape so as to overlap in the width direction of the compressor , and a trap part is provided, and at the end part forward from the back of the compressor The invention according to claim 3 is characterized in that an extending trap is formed, and a refrigeration cycle comprising a reciprocating type compressor using a flammable refrigerant, a condenser, a throttling device and a cooler, and a heat insulation box body of Is formed on the parts, as well as installing a compressor and a mechanical chamber which is arranged a suction piping is connected to the low pressure casing of the compressor to derive from the refrigeration cycle component in the body, lead to the machine room And a trap extending forward from the back surface of the compressor is formed in a part of the suction pipe connecting between the connecting portion formed on the compressor surface opposite to the outlet portion and this configuration. By using the trap, the flow of refrigeration oil from the compressor to the cabinet can be prevented with a simple configuration.
[0017]
The invention according to claim 4 is characterized in that the pipe to be connected is characterized in that at least a part of the pipe is passed through a substantially central part of the compressor width, and from a compressor with a simpler and standardized pipe configuration. Refrigerator oil can be prevented from flowing into the cabinet.
[0018]
The invention according to claim 5 is formed in the lower part of the heat insulation box main body, the refrigeration cycle comprising a reciprocating compressor using a flammable refrigerant, a condenser, a throttling device, and a cooler. And a mechanical chamber in which a suction pipe connected to the low pressure case of the compressor is disposed and the specific gravity of the check valve provided in the suction pipe connected to the compressor is It is characterized by being heavier, and by taking into account the specific gravity of the check valve provided in the suction pipe, it is possible to more easily suppress the flow of refrigeration oil to the cabinet side.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a state in which the machine room of the refrigerator is viewed from the rear. The machine room (2) is provided in the lower rear part of the cabinet body (1) made of a heat insulating box, and has an inclined bottom plate (4) and left and right side plates (5) (6) below the outer box rear plate (3). ) And a comp table (7) that forms the bottom surface.
[0020]
A compressor (9) is installed on a compressor base (7) forming the machine room (2) via a cushion body (8). The compressor (9) forms part of the refrigeration cycle, discharges the refrigerant from the discharge pipe (10), and is disposed on the back surface of the outer box rear plate (3) and the side plates (5) and (6) and on the bottom of the main body. It is introduced into a cooler (not shown) placed in the cabinet via a condenser (11) and a throttle device (12) consisting of a heat radiating pipe, and performs cooling. There are also rotary types. At present, the reciprocating type, which is mainly a low-pressure case, is often used.
[0021]
A suction pipe (15) which cools in the cooler and returns the evaporated vaporized refrigerant to the compressor (9) is led out to the machine room (2) from the lower end side of the outer casing rear plate (3). It is directly connected to the suction part (9a) formed on the case surface of the compressor (9) on the outlet side of 15).
[0022]
At this time, the suction pipe (15) is hung from the lead-out portion (15a) to the machine room (2), and then extended so as to be superposed to a substantially central position in the width direction of the compressor (9) to be U-turned. Thus, the trap portion (15b) is provided, and the end portion of the trap portion (15b) is further forward from the rear surface of the compressor in the space between the outlet portion (15a) and the compressor (2). Similarly to the above, a second trap (15c) that is U-turned by extending to substantially the center position of the depth dimension of the compressor is formed, and its tip is connected to the suction portion (9a) of the compressor (9). .
[0023]
At this time, the suction portion (9a) may be provided not on the side surface of the compressor case as shown in FIG. 1 but on the back surface portion of the case (9d) having a circular outer shape.
[0024]
FIG. 2 is a schematic cross-sectional configuration of a reciprocating type compressor. In a normal standing state of the refrigerator, the refrigerating type compressor is refrigerated with respect to the discharge pipe (10), the suction pipe (15), the motor (9b), and the compression cylinder (9c). The machine oil (16) is enclosed in a case (9e) of the compressor (9) in the state shown in the figure.
[0025]
With the above piping configuration, the refrigerator is laid down or inclined, for example, the lead-out side of the suction pipe (15) to the machine room (2), that is, the left side plate (5) of the cabinet body (1) in FIG. In this case, the refrigerating machine oil (16) in the compressor (9) flows out of the gravity into the suction pipe (15), but the suction pipe (15) then extends to the vicinity of the central part in the width direction on the compressor side. Therefore, the upper end of the suction pipe (15) in the sideways state is positioned higher than the oil level of the refrigerating machine oil accumulated in the compressor, and the U-turn part becomes a trap part (15b). This prevents the machine oil from flowing into the cabinet body (1).
[0026]
In addition, when the cabinet back (3) is turned down as the bottom, suction is performed by the second trap (15c) that extends to the front of the compressor (9) up to the approximate center of the depth and is U-turned. The upper end of the pipe (15) becomes higher than the oil level of the refrigerating machine oil in the compressor, and the reverse flow of the refrigerating machine oil after the trap (15c) to the cabinet body (1) side is prevented.
[0027]
When the suction pipe is led to the machine room (2) where the lead-out portion (15a) is opposite, that is, when the right side plate (6) of the cabinet in FIG. 1 is turned down, the lead-out portion (15a) of the suction pipe is It becomes an upper position from a compressor (9), and the refrigerating machine oil in a compressor does not flow into a cabinet main body (1).
[0028]
In addition, when the cabinet body (1) is tilted with the front side down, or in a so-called inverted state with the top surface of the cabinet body down, the connection position of the suction pipe (15) on the compressor (9) surface is Since it will be located above the center position of the compressor dimension in each direction and will be higher than the oil level of the refrigerating machine oil, oil will not flow out of the compressor (9).
[0029]
In the case of the reciprocating compressor of the embodiment, the discharge pipe (10) is connected to the cylinder (9c) and the piston (9d) in the compressor (9), and the cabinet body (1) is laid sideways. Even then, the refrigeration oil does not flow out of the discharge pipe.
[0030]
In FIG. 3, in which the same reference numerals are attached to the same parts as in FIG. 1, the suction pipe (35) is led out from the lower end side portion of the outer case rear plate (3) to the machine room (2), contrary to the above embodiment. Thereafter, the suction pipe (35) is an embodiment of a type connected to a suction portion (29a) formed on the case surface of the compressor (29) opposite to the outlet side of the suction pipe (35). After hanging from the lead-out part (35a) to the machine room (2), in the space between the lead-out part (35a) and the compressor (29), the compressor is moved forward from the back of the compressor. A trap (35c) is formed which extends to substantially the center of the depth dimension and is U-turned, and further, the end portion extends to the opposite side through the rear of the compressor (29), and then the suction portion ( 29a).
[0031]
With the above piping configuration, when the refrigerator is laid down, for example, when the left side surface (5) of the cabinet in FIG. 3 is turned down, the connection portion of the suction pipe (35) to the compressor (29) is connected to the upper side of the compressor. Therefore, the refrigeration oil does not leak out of the compressor from here, and when the right side (6) is set downward, the suction portion (29a) is positioned below, so that the refrigeration oil is located below the compressor. Although it flows out to the suction pipe (35) portion, it does not flow out to the upper part of the compressor (29) and does not flow into the cabinet body (1).
[0032]
Further, when the cabinet back surface (3) is tilted downward, the trap (35c) extending to the substantially central position of the depth dimension toward the front of the compressor and making a U-turn, as in the above embodiment, The upper end of the suction pipe (35) is higher than the oil level of the refrigerating machine oil in the compressor (29), preventing the reverse flow of the refrigerating machine oil after the trap (35c) and preventing the inflow into the cabinet (1). become.
[0033]
In addition, when the front side of the cabinet body is tilted downward, or in a so-called inverted state where the upper surface of the cabinet body is downward, the refrigeration oil does not flow out of the compressor for the same reason as in the above embodiment.
[0034]
The above is an example of a reciprocating type, and in the case of a rotary type compressor, since it is a high-pressure case, as described above, there is a greater possibility that the amount of HC refrigerant dissolved in the refrigerating machine oil will increase. Although not particularly illustrated, the suction pipe is connected to the cylinder of the compressor, and the refrigerant gas discharged from the cylinder is discharged into the case of the compressor and flows out of the discharge pipe. The same applies to the compressors of other forms of high-pressure cases.
[0036]
Next, another embodiment of the present invention will be described. As shown in FIG. 4, which is a perspective view of the machine room portion of the refrigerator, the same reference numerals are assigned to the same parts as in the embodiment, and a check valve (55a) is connected to the suction pipe (55) to the reciprocating compressor (49). And the specific gravity of the valve body in the check valve (55a) is made heavier than that of the refrigerating machine oil.
[0037]
The check valve (55a) originally prevents the refrigerant from flowing backward from the compressor (49) to the suction pipe (55), but the refrigerator is laid sideways during storage and transfer during the aforementioned crushing process. In this case, the connection part of the suction pipe (55) may be located below the compressor surface. At this time, if the specific gravity of the check valve (55a) is smaller than the refrigerator oil, The body lifts up and cannot close the valve. In order to prevent this, by making the specific gravity of the valve body larger than that of the refrigerating machine oil, it is possible to prevent the refrigerating machine oil from flowing out from the compressor to the suction pipe in any direction.
[0038]
【The invention's effect】
As described above, according to the refrigerator of the present invention, when disassembling and crushing for recycling, the refrigerators are stacked in a lying or inclined state and stored outdoors or transported, instead of being in a regular upright state. even when a part of that inlet piping connecting the piping formed in the outlet portion of the machine room and the reciprocating type compressor surfaces, refrigerator body becomes sideways state left and right side surfaces and the rear and downwards It can be arranged so that it is above the oil level of the refrigerating machine oil in the compressor at the time, and when crushing, it prevents the refrigerating machine oil from flowing out from the pipe in the crushing cabinet body, The melted combustible refrigerant can be prevented from flowing out, and the risk of ignition under some conditions can be prevented.
[Brief description of the drawings]
FIG. 1 is a perspective view of a machine room part of a refrigerator showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a schematic configuration of a compressor.
FIG. 3 is a perspective view of the same portion as FIG. 1 showing another embodiment of the present invention.
FIG. 4 is a perspective view of a refrigerator machine room portion showing another embodiment of the present invention.
FIG. 5 is an explanatory diagram showing a crushing and sorting configuration when the refrigerator is recycled.
FIG. 6 is a graph showing a change in the amount of HC refrigerant dissolved in refrigerating machine oil.
FIG. 7 is a perspective view of a machine room in the same part as FIG. 1 showing a conventional configuration.
DESCRIPTION OF SYMBOLS 1 ... Cabinet main body 2 ... Machine room 3 ... Outer box rear plate 5 ... Left side plate 6 ... Right side plate 7 ... Comp stand 9, 29, 49 ... Compressor 9a, 29a ... Suction part
10… Discharge pipe 15, 35, 55… Suction pipe
15a, 35a ... lead-out part 15b ... trap part
15c, 35c ... Trap 16 ... Refrigerating machine oil 17 ... Low temperature side throttle device
18 ... High temperature side throttle device 55a ... Check valve

Claims (5)

可燃性冷媒を使用したレシプロタイプ圧縮機と凝縮器と絞り装置および冷却器からなる冷凍サイクルと、断熱箱本体の下部に形成され、圧縮機を設置するとともに本体内における前記冷凍サイクル部品から導出して前記圧縮機の低圧ケース内に接続させた吸込み配管を配置した機械室とを有し、庫内から機械室への導出部と圧縮機面に形成した接続部との間を接続する前記吸込み配管の一部を、立設状態における圧縮機の幅方向に重合するようU字状に延設させるとともに、圧縮機の背面より前方へのU字状延出部を設けて配設させたことを特徴とする冷蔵庫。A refrigeration cycle composed of a reciprocating type compressor using flammable refrigerant condenser and the throttle device and a condenser, is formed in the lower portion of the insulating box body, derived from the refrigeration cycle parts in the body as well as installing a compressor and a machine room disposed a suction piping is connected to the low pressure casing of the compressor Te, connects the connection portion formed in the compressor side and the outlet portion of the machine room from the refrigerator the suction A part of the piping was extended in a U-shape so as to overlap in the width direction of the compressor in the standing state, and a U-shaped extending portion forward from the rear surface of the compressor was provided. A refrigerator characterized by. 可燃性冷媒を使用したレシプロタイプ圧縮機と凝縮器と絞り装置および冷却器からなる冷凍サイクルと、断熱箱本体の下部に形成され、圧縮機を設置するとともに本体内における前記冷凍サイクル部品から導出して前記圧縮機の低圧ケース内に接続させた吸込み配管を配置した機械室とを有し、機械室への導出部とこの導出部側の圧縮機面に形成した接続部との間を接続する前記吸込み配管の一部を、圧縮機の幅方向に重合するようU字状に延設してトラップ部を設けるとともに、その端部に圧縮機の背面より前方へ延びるトラップを形成したことを特徴とする冷蔵庫。A refrigeration cycle composed of a reciprocating type compressor using flammable refrigerant condenser and the throttle device and a condenser, is formed in the lower portion of the insulating box body, derived from the refrigeration cycle parts in the body as well as installing a compressor A machine room in which a suction pipe connected to the low pressure case of the compressor is arranged, and a connection between the lead-out part to the machine room and a connection part formed on the compressor surface on the lead-out part side is connected A part of the suction pipe is extended in a U shape so as to overlap in the width direction of the compressor to provide a trap part, and a trap extending forward from the back surface of the compressor is formed at an end thereof. Refrigerator. 可燃性冷媒を使用したレシプロタイプ圧縮機と凝縮器と絞り装置および冷却器からなる冷凍サイクルと、断熱箱本体の下部に形成され、圧縮機を設置するとともに本体内における前記冷凍サイクル部品から導出して前記圧縮機の低圧ケース内に接続させた吸込み配管を配置した機械室とを有し、機械室への導出部とこの導出部とは反対側の圧縮機面に形成した接続部との間を接続する前記吸込み配管の一部に、圧縮機の背面より前方へ延びるトラップを形成したことを特徴とする冷蔵庫。A refrigeration cycle composed of a reciprocating type compressor using flammable refrigerant condenser and the throttle device and a condenser, is formed in the lower portion of the insulating box body, derived from the refrigeration cycle parts in the body as well as installing a compressor A machine room in which a suction pipe connected to the low-pressure case of the compressor is disposed, and between a lead-out part to the machine room and a connection part formed on the compressor surface opposite to the lead-out part A refrigerator is provided, wherein a trap extending forward from the back surface of the compressor is formed in a part of the suction pipe that connects to the compressor. 接続する配管は、その少なくとも一部を圧縮機幅のほぼ中央部を経由させたこと特徴とする請求項1乃至3のいずれかに記載の冷蔵庫。  The refrigerator according to any one of claims 1 to 3, wherein at least a part of the pipe to be connected passes through a substantially central part of the compressor width. 可燃性冷媒を使用したレシプロタイプ圧縮機と凝縮器と絞り装置および冷却器からなる冷凍サイクルと、断熱箱本体の下部に形成され、圧縮機を設置するとともに本体内における前記冷凍サイクル部品から導出して前記圧縮機の低圧ケース内に接続させた吸込み配管を配置した機械室とを有し、圧縮機に接続した吸込みパイプに設けた逆止弁の比重を冷凍機油より重くしたことを特徴とする冷蔵庫。A refrigeration cycle composed of a reciprocating type compressor using flammable refrigerant condenser and the throttle device and a condenser, is formed in the lower portion of the insulating box body, derived from the refrigeration cycle parts in the body as well as installing a compressor And a mechanical chamber in which a suction pipe connected to the low pressure case of the compressor is disposed, and the specific gravity of the check valve provided in the suction pipe connected to the compressor is made heavier than that of the refrigerator oil. refrigerator.
JP2002293954A 2002-10-07 2002-10-07 refrigerator Expired - Lifetime JP3946611B2 (en)

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JP2002293954A JP3946611B2 (en) 2002-10-07 2002-10-07 refrigerator
TW092123523A TWI245873B (en) 2002-10-07 2003-08-27 Refrigeator
PCT/JP2003/012374 WO2004031666A1 (en) 2002-10-07 2003-09-26 Refrigerator
DE60330175T DE60330175D1 (en) 2002-10-07 2003-09-26 COOLER
EP03799145A EP1557623B1 (en) 2002-10-07 2003-09-26 Refrigerator
CNB038237792A CN100439826C (en) 2002-10-07 2003-09-26 Refrigerator
KR1020057005616A KR20050054982A (en) 2002-10-07 2003-09-26 Refrigerator

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EP1557623B1 (en) 2009-11-18
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CN100439826C (en) 2008-12-03
JP2004125353A (en) 2004-04-22
DE60330175D1 (en) 2009-12-31
WO2004031666A1 (en) 2004-04-15
KR20050054982A (en) 2005-06-10
TWI245873B (en) 2005-12-21
TW200409893A (en) 2004-06-16

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