JP2004069245A - Refrigerator - Google Patents

Refrigerator Download PDF

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Publication number
JP2004069245A
JP2004069245A JP2002232260A JP2002232260A JP2004069245A JP 2004069245 A JP2004069245 A JP 2004069245A JP 2002232260 A JP2002232260 A JP 2002232260A JP 2002232260 A JP2002232260 A JP 2002232260A JP 2004069245 A JP2004069245 A JP 2004069245A
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JP
Japan
Prior art keywords
evaporator
refrigerator
damper
cool air
temperature
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.)
Pending
Application number
JP2002232260A
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Japanese (ja)
Inventor
Hideyuki Nakamura
中村 英幸
Akiyoshi Ohira
大平 昭義
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Appliances Inc
Original Assignee
Hitachi Home and Life Solutions Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Home and Life Solutions Inc filed Critical Hitachi Home and Life Solutions Inc
Priority to JP2002232260A priority Critical patent/JP2004069245A/en
Publication of JP2004069245A publication Critical patent/JP2004069245A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To reduce a power consumption by efficiently cooling the cooling chambers of a refrigerator and increasing the efficiency of a refrigerating cycle to prevent a heat load from increasing in the refrigerator. <P>SOLUTION: This refrigerator comprises the refrigerating cycle having a refrigerant circuit 5 with a compressor 1, a condenser 2, a decompressor 3, and an evaporator 4 connected sequentially in series to each other and a chamber circulation fan 7 circulating cool air cooled by the evaporator 4 into the cooling chamber. A freezing chamber air blow damper 8a and a refrigerating chamber air blow damper 9a are installed in a cool air ventilating passage 6a, and a freezing chamber return damper 8b and a refrigerating chamber return damper 9b are installed in a cool air return air passage 6b. The opening and closing of the air blow dampers and the return dampers are controlled so that their temperatures become those suitable for the cooling chambers in different temperature zones. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、冷蔵庫に係り、特に温度帯の異なる冷蔵庫内の各冷却室を一つの蒸発器で冷却する冷蔵庫に好適なものである。
【0002】
【従来の技術】
従来の冷蔵庫としては、特開平08−296942号公報に記されているものが有る。すなわち、この冷蔵庫では、圧縮機と凝縮器と減圧器と蒸発器を冷媒流路で接続して冷凍サイクルを構成し、二つ以上の異なる温度帯の冷却室に通じる冷気通風路に庫内冷却ファンを備え、冷気通風路に、二つ以上の異なる温度帯の冷却室に対する冷気送風路について開放もしくは遮断を選択できるダンパを設け、冷凍サイクル中の減圧器の減圧量を可変にし、蒸発器で異なる温度の冷気を作るとともに、二つ以上の異なる温度帯の冷却室に適した異なる温度の冷気を吹き分けるようにダンパを連動するように制御させ、温度帯の低い冷却室を冷却するときは減圧器の抵抗を大きくし、庫内冷却ファンの回転数を低回転にし、温度帯の高い冷却室を冷却するときは減圧器の抵抗を小さくし、庫内冷却ファンの回転数を高回転にする事により、それぞれの温度帯に適合した蒸発温度で効率良く庫内を冷却する方法が知られている。
【0003】
【発明が解決しようとする課題】
従来の冷蔵庫においては、二つ以上の異なる温度帯の冷気送風路にのみダンパを設けている為、温度帯の低い冷却室を冷却する場合、蒸発温度が低くなっているため、低い温度の冷気が冷気戻り風路から逆流して、温度帯の高い冷却室にわずかな量が流入することがある。また、温度帯の高い冷却室を冷却する場合、蒸発温度が高くなっているため、高い温度の冷気が冷気戻り風路から逆流して、温度帯の低い冷却室にわずかな量が流入することがある。低い温度帯の冷却室に高い温度の冷気が流入すると低い温度帯の冷却室の温度を上昇させて熱負荷を増加させてしまうことになるため、結果的に余計に冷凍サイクルを運転する事となり、省電力には寄与しないという課題があった。
【0004】
さらに、通常冷蔵庫では圧縮機を断続させて庫内の温度調節をする場合、圧縮機が停止したとき、冷凍サイクル内の圧力がバランスするのに伴い、凝縮器側の高温冷媒が蒸発器に流入し蒸発器が高温となるため、冷気戻り風路から高温蒸発器の自然対流によって、庫内温度が上昇して熱負荷を増加させてしまうことになるため、結果的に余計に冷凍サイクルを運転する事となり、省電力には寄与しないという課題もあった。そこで、凝縮器の高温冷媒が蒸発器に流れ込むのを防ぐために、蒸発器の入口側を圧縮機が停止した際に同時に閉鎖することが考えられるが、この場合には、圧縮機前後の圧力バランスが大きい状態が維持され、圧縮機の起動不能のおそれが生じるという課題があった。
【0005】
さらに、蒸発器に付着した霜を除去する(除霜)手段として、ヒータ等を用いて蒸発器を加熱する方法も、同様に冷気戻り風路から高温蒸発器の自然対流によって、庫内温度を上昇させて熱負荷を増加させてしまうことになるため、結果的に余計に冷凍サイクルを運転する事となり、省電力には寄与しないという課題があった。
【0006】
本発明の第1の目的は、二つ以上の異なる温度帯の冷却室を冷却する場合、それぞれの温度帯に合わせた蒸発器温度に制御し、冷凍サイクル上、効率良く各冷却室を冷却し、冷却速度を早くできると共に、高い温度帯の冷却室を冷却中の低い温度帯の冷却室への熱負荷の増加を防止でき、冷凍サイクルの効率を向上して消費電力量の低減を図ることができる冷蔵庫を提供することにある。
【0007】
本発明の第2の目的は、二つ以上の異なる温度帯の冷却室を冷却する場合、それぞれの温度帯に合わせた蒸発器温度に制御し、冷凍サイクル上、効率良く各冷却室を冷却し、冷却速度を早くできると共に冷却運転停止時に熱負荷の増加を防止でき、冷凍サイクルの効率を向上して消費電力量の低減を図ることができ、しかも圧縮機の起動が容易な冷蔵庫を提供することにある。
【0008】
本発明の第3の目的は、二つ以上の異なる温度帯の冷却室を冷却する場合、それぞれの温度帯に合わせた蒸発器温度に制御し、冷凍サイクル上、効率良く各冷却室を冷却し、冷却速度を早くできると共に蒸発器の除霜の際も熱負荷の増加を防止でき、冷凍サイクルの効率を向上して消費電力量の低減を図ることができ、しかも圧縮機の起動が容易な冷蔵庫を提供することにある。
【0009】
【課題を解決するための手段】
上記第1の目的は、圧縮機と、凝縮器と、減圧装置と、蒸発器を順に直列に接続した冷媒回路を有する冷凍サイクルを備えると共に、前記蒸発器によって冷却された冷気を、二つ以上の異なる温度帯の冷却室に循環させる庫内循環ファンを備え、それらを制御する制御装置を備えた冷蔵庫において、前記蒸発器および前記庫内循環ファンを備えた冷気通風路に、前記二つ以上の異なる温度帯の冷却室に対する冷気送風路および冷気戻り風路それぞれについて開放あるいは遮断を選択できる送風ダンパおよび戻りダンパを設け、前記二つ以上の異なる温度帯の冷却室に適した温度となるように、前記送風ダンパおよび前記戻りダンパの開閉を制御する構成にすることで達成される。
【0010】
上記第2の目的は、圧縮機と、凝縮器と、減圧装置と、蒸発器を順に直列に接続した冷媒回路を有する冷凍サイクルを備えると共に、前記蒸発器によって冷却された冷気を、二つ以上の異なる温度帯の冷却室に循環させる庫内循環ファンを備え、それらを制御する制御装置を備えた冷蔵庫において、前記減圧装置として、冷媒回路の蒸発器側に一本のキャピラリーチューブと前記キャピラリーチューブに直列に設けた電動膨張弁とを備え、前記蒸発器および前記庫内循環ファンを備えた冷気通風路に、前記二つ以上の異なる温度帯の冷却室に対する冷気送風路および冷気戻り風路それぞれについて開放あるいは遮断を選択できる送風ダンパおよび戻りダンパを設け、前記電動膨張弁により減圧量を可変とし、前記蒸発器を異なる温度に変化させ異なる温度の冷気を作るとともに、前記二つ以上の異なる温度帯の冷却室に適した温度の冷気を送風するように、前記送風ダンパおよび前記戻りダンパの開閉を連動させるように制御する構成にすることで達成される。
【0011】
上記第3の目的は、圧縮機と、凝縮器と、減圧装置と、蒸発器を順に直列に接続した冷媒回路を有する冷凍サイクルを備えると共に、前記蒸発器によって冷却された冷気を、二つ以上の異なる温度帯の冷却室に循環させる庫内循環ファンを備え、それらを制御する制御装置を備えた冷蔵庫において、前記減圧装置として、冷媒回路の蒸発器側に少なくとも前記二つの異なる冷却室の数のキャピラリーチューブとこれらの前記キャピラリーチューブを選択する電動切換弁を設け、前記蒸発器および前記庫内循環ファンを備えた冷気通風路に、前記二つ以上の異なる温度帯の冷却室に対する冷気送風路および冷気戻り風路それぞれについて開放あるいは遮断を選択できる送風ダンパおよび戻りダンパを設け、前記キャピラリーチューブの選択により減圧量を可変とし、前記蒸発器を異なる温度に変化させ異なる温度の冷気を作るとともに、前記二つ以上の異なる温度帯の冷却室に適した温度の冷気を送風するように、前記送風ダンパおよび前記戻りダンパの開閉を連動させるように制御する構成することで達成される。
【0012】
【発明の実施の形態】
以下、本発明の一実施例を図1から図3を用いて説明する。図1は本発明の一実施例の冷蔵庫の冷凍サイクル構成図、図2は同冷蔵庫の風路構成図、図3は同冷蔵庫の動作例のタイムチャートである。
【0013】
冷凍サイクルは、図1に示すように、圧縮機1、凝縮器2、減圧装置3、蒸発器4を直列に接続した冷媒回路5、冷気の風量および冷却時間を調節して制御される2つの温度帯を持つ、すなわち、冷凍室、冷蔵室に冷気を通風させる冷気通風路6により構成されている。冷気通風路6は、蒸発器4、冷蔵庫内に冷気を循環させる回転数可変の庫内循環ファン7、冷凍室、冷蔵室(図示せず)へ選択的に冷気を送るため、冷気送風路6aおよび冷気戻り風路6bそれぞれに設けられた冷凍室用送風ダンパ8a、冷蔵室用送風ダンパ9a、冷凍室用戻りダンパ8b、冷蔵室用戻りダンパ9bを有している。そして、図2に示すような構成で冷蔵庫に風路を構成している。
【0014】
次に、かかる冷蔵庫の動作を図3を参照しながら説明する。
温度帯の低い冷却室(例えば冷凍室)が、ある設定温度以上になり、冷凍室のみを冷却する必要が生じた場合には、冷蔵庫の冷凍サイクルを稼動する為に、圧縮機1をオン(既に圧縮機1がオンしている場合はこの限りでない)すると共に、庫内循環ファン7をオンする。この場合、圧縮機1をオンしてから蒸発器4の温度が蒸発器4に取り付けた蒸発器温度センサ(図示せず)が検知した温度があらかじめ設定した温度以下になってから、庫内循環ファン7をオンしても良い。このとき庫内循環ファン7の回転数はあらかじめ設定された回転数、あるいは蒸発器温度センサの検知温度によって回転数を制御しても良い。あわせて、冷凍室用送風ダンパ8a、冷凍室用戻りダンパ8bを開口し、その他の温度帯用の冷蔵室用送風ダンパ9a、冷蔵室用戻りダンパ9bは閉じることにより、冷凍室のみを冷却する。図3においては冷凍室用送風ダンパ8aおよび冷凍室用送風ダンパ9aを、総称して冷凍室用ダンパ、冷蔵室用送風ダンパ8bおよび冷蔵室用戻りダンパ9bを、総称して冷蔵室ダンパと記している。
【0015】
一方、温度帯の高い冷却室(例えば冷蔵室)がある設定温度以上になり、冷蔵室のみを冷却する必要が生じた場合には、冷蔵室用送風ダンパ9a、冷蔵室用戻りダンパ9bを開口し、その他の温度帯用の冷凍室用送風ダンパ8a、冷凍室用戻りダンパ8bは閉じることにより、冷蔵室のみを冷却する。このとき庫内循環ファン7の回転数はあらかじめ設定された回転数、あるいは蒸発器温度センサの検知温度によって回転数を制御しても良い。
【0016】
こうすることにより、温度帯の高い冷蔵室を冷却する際に、温度帯の低い冷凍室への温度帯の高い冷気の流入を防止することができ、冷凍室の温度上昇を最小限に抑える事ができる。
【0017】
次に、本発明の別の実施例を図4および図6を用いて説明する。
図4は本発明の一実施例の冷蔵庫の冷凍サイクル構成図である。図中、図1と同一符号のものは先の実施例と同等部分であるから、その説明を省略する。図4は図1と同様に2つの温度帯を持ち、それぞれの温度は冷媒の減圧量、冷気の風量および冷却時間を調節して制御される。図1に示したものと異なるところは、減圧装置3を、キャピラリーチューブ3aと電動膨張弁3bを直列に接続した構成としたところにある。
【0018】
次に、かかる冷蔵庫の動作を図6を参照しながら説明する。
温度帯の低い冷却室(例えば冷凍室)が、ある設定温度以上になり、冷凍室のみを冷却する必要が生じた場合には、電動膨張弁3bを絞ることにより流路抵抗を大きくし、また、流路抵抗を大きくするのと同時または前後で冷蔵庫の冷凍サイクルを稼動する為に、圧縮機1をオン(既に圧縮機1がオンしている場合はこの限りでない)すると共に、庫内循環ファン7をオンする。この場合、圧縮機1をオンしてから蒸発器4の温度が蒸発器4に取り付けた蒸発器温度センサ(図示せず)が検知した温度があらかじめ設定した温度以下になってから、庫内循環ファン7をオンしても良い。このとき庫内循環ファン7の回転数はあらかじめ設定された回転数、あるいは蒸発器温度センサの検知温度によって回転数を制御しても良い。また、電動膨張弁3bの絞りも蒸発機温度センサの検知温度、あるいは冷凍室温度検知センサ(図示せず)の温度によって絞りを調整しても良い。あわせて、冷凍室用送風ダンパ8a、冷凍室用戻りダンパ8bを開口し、その他の温度帯用の冷蔵室用送風ダンパ9a、冷蔵室用戻りダンパ9bは閉じることにより、冷凍室のみを冷却する。
【0019】
一方、温度帯の高い冷却室(例えば冷蔵室)がある設定温度以上になり、冷蔵室のみを冷却する必要が生じた場合には、電動膨張弁3bを開くことにより流路抵抗を小さくし、冷蔵室用送風ダンパ9a、冷蔵室用戻りダンパ9bを開口し、その他の温度帯用の冷凍室用送風ダンパ8a、冷凍室用戻りダンパ8bは閉じることにより、冷蔵室のみを冷却する。このとき庫内循環ファン7の回転数はあらかじめ設定された回転数、あるいは蒸発器温度センサの検知温度によって回転数を制御しても良い。また、電動膨張弁3bの絞りも蒸発機温度センサの検知温度、あるいは冷蔵室温度検知センサ(図示せず)の温度によって絞りを調整しても良い。
【0020】
こうすることにより、温度帯の高い冷蔵室を冷却する際に、温度帯の低い冷凍室への温度帯の高い冷気の流入を防止することができ、冷凍室の温度上昇を最小限に抑える事ができる。また、温度帯の異なる冷却室の温度にあわせて蒸発器温度を変化できるので、冷凍サイクル上効率の良い運転ができるので、消費電力量の低減を図る事ができる。
【0021】
次に、本発明の別の実施例を図5および図6を用いて説明する。
図5は本発明の別の実施例の冷蔵庫の冷凍サイクル構成図である。図中、図1と同一符号のものは先の実施例と同等部分であるから、その説明を省略する。図5は図1と同様に2つの温度帯を持ち、それぞれの温度は冷媒の減圧量、冷気の風量および冷却時間を調節して制御される。図1に示したものと異なるところは、減圧装置3を冷凍室用キャピラリーチューブ3cと冷蔵室用キャピラリーチューブ3dを並列に、また、冷媒の流れを冷凍室用キャピラリーチューブ3c、あるいは、冷蔵室用キャピラリーチューブ3d、あるいは両方と、切換えることが可能な電動切換弁10を接続した構成としたところにある。
【0022】
次に、かかる冷蔵庫の動作を図6を参照しながら説明する。
温度帯の低い冷却室(例えば冷凍室)が、ある設定温度以上になり、冷凍室のみを冷却する必要が生じた場合には、電動切換弁10を冷凍室用キャピラリーチューブ3c側に切換えることにより流路抵抗を大きくし、また、流路抵抗を大きくするのと同時、または前後で冷蔵庫の冷凍サイクルを稼動する為に、圧縮機1をオン(既に圧縮機1がオンしている場合はこの限りでない)すると共に、庫内循環ファン7をオンする。この場合、圧縮機1をオンしてから蒸発器4の温度が蒸発器4に取り付けた蒸発器温度センサ(図示せず)が検知した温度があらかじめ設定した温度以下になってから、庫内循環ファン7をオンしても良い。このとき庫内循環ファン7の回転数はあらかじめ設定された回転数、あるいは蒸発器温度センサの検知温度によって回転数を制御しても良い。あわせて、冷凍室用送風ダンパ8a、冷凍室用戻りダンパ8bを開口し、その他の温度帯用の冷蔵室用送風ダンパ9a、冷蔵室用戻りダンパ9bは閉じることにより、冷凍室のみを冷却する。
【0023】
一方、温度帯の高い冷却室(例えば冷蔵室)がある設定温度以上になり、冷蔵室のみを冷却する必要が生じた場合には、電動切換弁10を冷蔵室用キャピラリーチューブ3d側に切換えることにより流路抵抗を小さくし、冷蔵室用送風ダンパ9a、冷蔵室用戻りダンパ9bを開口し、その他の温度帯用の冷凍室用送風ダンパ8a、冷凍室用戻りダンパ8bは閉じることにより、冷蔵室のみを冷却する。このとき庫内循環ファン7の回転数はあらかじめ設定された回転数、あるいは蒸発器温度センサの検知温度によって回転数を制御しても良い。また、電動切換弁10を蒸発機温度センサの検知温度、あるいは冷蔵室温度検知センサ(図示せず)の温度によって、冷凍室用キャピラリーチューブ3cおよび冷蔵室用キャピラリーチューブ3dの両方に流れるようにし、流路抵抗を小さく調整しても良い。
【0024】
こうすることにより、温度帯の高い冷蔵室を冷却する際に、温度帯の低い冷凍室への温度帯の高い冷気の流入を防止することができ、冷凍室の温度上昇を最小限に抑える事ができる。また、温度帯の異なる冷却室の温度にあわせて蒸発器温度を変化できるので、冷凍サイクル上効率の良い運転ができるので、消費電力量の低減を図る事ができる。
【0025】
以上の実施例において、さらに、各温度帯の全室が設定温度以下まで冷却され、圧縮機が停止したときは、前記冷凍室用送風ダンパ8a、冷凍室用戻りダンパ8b、冷蔵室用送風ダンパ9a、冷蔵室用戻りダンパ9bの全てのダンパを閉鎖することにより、圧縮機停止後の、冷凍サイクル内の圧力がバランスするのに伴い、凝縮器側の高温冷媒が蒸発器に流入することによる蒸発器の高温化、または、除霜運転時の蒸発器の高温化によって発生する、高温蒸発器からのの自然対流によって、暖気が冷却室に流入することを防止することができ、冷却室内の温度上昇を最小限に押さえる事ができる。
【0026】
【発明の効果】
本発明によれば、二つ以上の異なる温度帯の冷却室を冷却する場合、それぞれの温度帯に合わせた蒸発器温度に制御し、冷凍サイクル上、効率良く各冷却室を冷却し、冷却速度を早くできると共に、高い温度帯の冷却室を冷却中の低い温度帯の冷却室への熱負荷の増加を防止でき、冷凍サイクルの効率を向上して消費電力量の低減を図ることができる冷蔵庫を提供することができる。
【図面の簡単な説明】
【図1】本発明の第1実施例の冷蔵庫の冷凍サイクル構成図である。
【図2】図1に示した冷蔵庫の風路構成図である。
【図3】図1に示した冷蔵庫の動作例のタイムチャート図である。
【図4】本発明の第2実施例の冷蔵庫の冷凍サイクル構成図である。
【図5】本発明の第3実施例の冷蔵庫の冷凍サイクル構成図である。
【図6】図4ないし図5に示した冷蔵庫の動作例のタイムチャート図である。
【符号の説明】
1…圧縮機、2…凝縮器、3…減圧装置、3a…キャピラリーチューブ、3b…電動膨張弁、3c…冷凍室用キャピラリーチューブ、3d…冷蔵室用キャピラリーチューブ、4…蒸発器、5…冷媒回路、6…冷気通風路、6a…冷気送風路、6b…冷気戻り風路、7…庫内循環ファン、8a…冷凍室用送風ダンパ、8b…冷蔵室用送風ダンパ、9a…冷凍室用戻りダンパ、9b…冷蔵室用戻りダンパ、10…電動切換弁
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a refrigerator, and is particularly suitable for a refrigerator in which each cooling chamber in a refrigerator having a different temperature zone is cooled by one evaporator.
[0002]
[Prior art]
As a conventional refrigerator, there is a refrigerator described in JP-A-08-296942. That is, in this refrigerator, a compressor, a condenser, a decompressor, and an evaporator are connected by a refrigerant flow path to form a refrigeration cycle, and the inside of the refrigerator is cooled by a cool air ventilation passage communicating with cooling chambers in two or more different temperature zones. Equipped with a fan, provided in the cool air ventilation path, a damper that can select to open or shut off the cool air ventilation path for cooling chambers in two or more different temperature zones, make the pressure reduction amount of the pressure reducer during the refrigeration cycle variable, When cooling the cooling chambers with low temperature zone, make the cold air of different temperature, and control the damper so as to blow out the cooling air of different temperature suitable for the cooling chamber of two or more different temperature zones. Increase the resistance of the decompressor, lower the rotation speed of the cooling fan in the refrigerator, and lower the pressure of the decompressor when cooling the cooling chamber in a high temperature zone, and increase the rotation speed of the cooling fan in the refrigerator. By doing How to efficiently cooled in the refrigerator the evaporation temperature adapted to the temperature zone respectively is known.
[0003]
[Problems to be solved by the invention]
In conventional refrigerators, dampers are provided only in the cool air passages in two or more different temperature zones, so when cooling a cooling room in a low temperature zone, the evaporation temperature is low. May flow backward from the return path of the cold air, and a small amount may flow into the cooling chamber having a high temperature zone. Also, when cooling a cooling room with a high temperature zone, the evaporation temperature is high, so that a small amount of cold air with a high temperature flows back into the cooling room with a low temperature zone due to the backflow from the cool air return air path. There is. When high-temperature cold air flows into the low-temperature zone cooling chamber, the temperature of the low-temperature zone cooling chamber rises and the heat load increases, resulting in an extra refrigeration cycle operation. However, there is a problem that it does not contribute to power saving.
[0004]
Furthermore, in a normal refrigerator, when controlling the temperature inside the refrigerator by turning the compressor on and off, when the compressor stops, the high-temperature refrigerant on the condenser side flows into the evaporator as the pressure in the refrigeration cycle balances. Since the temperature of the evaporator becomes high, the temperature inside the refrigerator rises due to natural convection of the high-temperature evaporator from the cool air return air path, increasing the heat load. However, there is also a problem that it does not contribute to power saving. In order to prevent the high-temperature refrigerant in the condenser from flowing into the evaporator, it is conceivable that the inlet side of the evaporator is closed at the same time when the compressor stops, but in this case, the pressure balance before and after the compressor is considered. Is maintained, and there is a problem that the compressor may not be able to start.
[0005]
Further, as a means for removing frost adhering to the evaporator (defrosting), a method of heating the evaporator using a heater or the like is also possible. Since the heat load is increased by raising the temperature, the refrigeration cycle is operated extra as a result, and there is a problem that it does not contribute to power saving.
[0006]
A first object of the present invention is to control the evaporator temperature in accordance with each temperature zone when cooling the cooling chambers in two or more different temperature zones, and to efficiently cool each cooling chamber on a refrigeration cycle. In addition to increasing the cooling rate, it is also possible to prevent an increase in the heat load on the cooling chamber in the lower temperature zone while cooling the cooling chamber in the higher temperature zone, and to improve the efficiency of the refrigeration cycle and reduce the power consumption. It is to provide a refrigerator that can be used.
[0007]
A second object of the present invention is to control the evaporator temperature in accordance with each temperature zone when cooling the cooling chambers in two or more different temperature zones, and to efficiently cool each cooling chamber on a refrigeration cycle. The present invention provides a refrigerator that can increase the cooling rate, prevent an increase in heat load when the cooling operation is stopped, improve the efficiency of the refrigeration cycle, reduce power consumption, and easily start the compressor. It is in.
[0008]
A third object of the present invention is to control the evaporator temperature in accordance with each temperature zone when cooling the cooling chambers in two or more different temperature zones, and to efficiently cool each cooling chamber on a refrigeration cycle. In addition, the cooling rate can be increased and the heat load can be prevented during the defrosting of the evaporator, so that the efficiency of the refrigeration cycle can be improved, the power consumption can be reduced, and the compressor can be easily started. It is to provide a refrigerator.
[0009]
[Means for Solving the Problems]
The first object is to provide a compressor, a condenser, a decompression device, and a refrigeration cycle having a refrigerant circuit in which an evaporator is connected in series in order, and to cool two or more cool air cooled by the evaporator. In a refrigerator provided with a circulating fan in the refrigerator that circulates through the cooling chambers of different temperature zones and provided with a control device for controlling them, the evaporator and the cool air ventilation path including the circulating fan in the refrigerator have two or more of the two or more. A blower damper and a return damper that can be selected to be open or shut off for each of the cool air blow path and the cool air return wind path for the cooling chambers in different temperature zones, so that the temperature becomes suitable for the cooling chambers in the two or more different temperature zones. In addition, this is achieved by a configuration that controls opening and closing of the blower damper and the return damper.
[0010]
The second object is to provide a compressor, a condenser, a decompression device, and a refrigeration cycle having a refrigerant circuit in which an evaporator is connected in series in order, and to cool two or more cool air cooled by the evaporator. A refrigerator provided with a circulating fan for circulating in cooling chambers of different temperature zones, and a control device for controlling them, wherein, as the decompression device, one capillary tube and the capillary tube on the evaporator side of a refrigerant circuit. An electric expansion valve provided in series with the cooling air ventilation path provided with the evaporator and the in-compartment circulation fan, the cooling air blowing path and the cooling air return path for the cooling chambers in the two or more different temperature zones, respectively. A blow damper and a return damper that can be selected to be opened or shut off are provided, and the amount of pressure reduction is made variable by the electric expansion valve. In order to produce cold air at different temperatures, the air damper and the return damper are controlled to be linked to open and close so as to blow cold air at a temperature suitable for the cooling chambers in the two or more different temperature zones. Is achieved by
[0011]
The third object is to provide a compressor, a condenser, a decompression device, and a refrigeration cycle having a refrigerant circuit in which an evaporator is connected in series in order, and to cool two or more cool air cooled by the evaporator. A refrigerator provided with a circulating fan for circulating in cooling chambers of different temperature zones, and a control device for controlling them, wherein the number of at least the two different cooling chambers on the evaporator side of the refrigerant circuit is reduced as the pressure reducing device. A capillary tube and a motor-operated switching valve for selecting these capillary tubes; a cool air ventilation passage provided with the evaporator and the internal circulation fan; And a blower damper and a return damper that can be selected to be opened or shut off for each of the cool air return air passages, The amount of reduced pressure is variable, and the evaporator is changed to a different temperature to create cold air at different temperatures, and the blower damper and the blower damper are used to blow cool air at a temperature suitable for the cooling chambers in the two or more different temperature zones. This is achieved by controlling the opening and closing of the return damper to be linked.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram of a refrigeration cycle of a refrigerator according to an embodiment of the present invention, FIG. 2 is a configuration diagram of an air passage of the refrigerator, and FIG. 3 is a time chart of an operation example of the refrigerator.
[0013]
As shown in FIG. 1, the refrigeration cycle is controlled by adjusting a compressor circuit, a condenser 2, a decompression device 3, and a refrigerant circuit 5 in which an evaporator 4 is connected in series, a flow rate of cool air and a cooling time. It has a temperature zone, that is, is constituted by a cool air passage 6 for passing cool air through a freezing room and a refrigerator room. The cool air passage 6 is provided with a cool air passage 6 a for selectively sending cool air to the evaporator 4, a circulating fan 7 having a variable number of revolutions for circulating cool air in the refrigerator, a freezing room, and a refrigerating room (not shown). In addition, it has a freezing room blower damper 8a, a refrigerating room blower damper 9a, a freezer room return damper 8b and a refrigerating room return damper 9b provided in each of the cool air return air passages 6b. Then, an air path is formed in the refrigerator with a structure as shown in FIG.
[0014]
Next, the operation of the refrigerator will be described with reference to FIG.
When a cooling room (for example, a freezing room) having a low temperature zone becomes higher than a certain set temperature and only the freezing room needs to be cooled, the compressor 1 is turned on (to operate a refrigeration cycle of the refrigerator). This does not apply when the compressor 1 is already on), and the internal circulation fan 7 is turned on. In this case, after the temperature of the evaporator 4 is turned on after the compressor 1 is turned on, the temperature detected by an evaporator temperature sensor (not shown) attached to the evaporator 4 becomes equal to or lower than a preset temperature, and then the circulation in the refrigerator is performed. The fan 7 may be turned on. At this time, the number of revolutions of the internal circulation fan 7 may be controlled by a preset number of revolutions or a temperature detected by an evaporator temperature sensor. At the same time, the freezer compartment air blow damper 8a and the freezer compartment return damper 8b are opened, and the other cooler room air blower dampers 9a and the cooler room return dampers 9b are closed to cool only the freezer compartment. . In FIG. 3, the freezing room air damper 8a and the freezing room air damper 9a are collectively referred to as a freezing room damper, the refrigerating room air damper 8b and the refrigerating room return damper 9b are generally referred to as a refrigerating room damper. ing.
[0015]
On the other hand, when a cooling room (for example, a refrigeration room) having a high temperature zone becomes higher than a certain set temperature and only the refrigeration room needs to be cooled, the refrigeration room blowing damper 9a and the refrigeration room return damper 9b are opened. Then, only the refrigerating compartment air blowing damper 8a and the freezing compartment return damper 8b for other temperature zones are closed to cool only the refrigerating compartment. At this time, the number of revolutions of the internal circulation fan 7 may be controlled by a preset number of revolutions or a temperature detected by an evaporator temperature sensor.
[0016]
By doing so, it is possible to prevent high-temperature cold air from flowing into the low-temperature freezer compartment when cooling the high-temperature refrigerator compartment, thereby minimizing the temperature rise in the freezer compartment. Can be.
[0017]
Next, another embodiment of the present invention will be described with reference to FIGS.
FIG. 4 is a configuration diagram of a refrigeration cycle of a refrigerator according to one embodiment of the present invention. In the figure, components having the same reference numerals as those in FIG. 1 are the same as those in the previous embodiment, and the description thereof will be omitted. FIG. 4 has two temperature zones as in FIG. 1, and the respective temperatures are controlled by adjusting the pressure reduction amount of the refrigerant, the air volume of the cool air, and the cooling time. The difference from the one shown in FIG. 1 is that the pressure reducing device 3 has a configuration in which a capillary tube 3a and an electric expansion valve 3b are connected in series.
[0018]
Next, the operation of the refrigerator will be described with reference to FIG.
When the temperature of a cooling room (for example, a freezing room) having a low temperature zone becomes higher than a certain set temperature and only the freezing room needs to be cooled, the flow resistance is increased by narrowing the electric expansion valve 3b. In order to operate the refrigerating cycle of the refrigerator at the same time as or before and after increasing the flow path resistance, the compressor 1 is turned on (this is not the case when the compressor 1 is already on), and the circulation in the refrigerator is performed. The fan 7 is turned on. In this case, after the temperature of the evaporator 4 is turned on after the compressor 1 is turned on, the temperature detected by an evaporator temperature sensor (not shown) attached to the evaporator 4 becomes equal to or lower than a preset temperature, and then the circulation in the refrigerator is performed. The fan 7 may be turned on. At this time, the number of revolutions of the internal circulation fan 7 may be controlled by a preset number of revolutions or a temperature detected by an evaporator temperature sensor. Also, the throttle of the electric expansion valve 3b may be adjusted by the temperature detected by the evaporator temperature sensor or the temperature of the freezer compartment temperature sensor (not shown). At the same time, the freezer compartment air blow damper 8a and the freezer compartment return damper 8b are opened, and the other cooler room air blower dampers 9a and the cooler room return dampers 9b are closed to cool only the freezer compartment. .
[0019]
On the other hand, when a cooling room (for example, a refrigeration room) in a high temperature zone becomes higher than a certain set temperature and it becomes necessary to cool only the refrigeration room, the flow resistance is reduced by opening the electric expansion valve 3b. Only the refrigerating room is cooled by opening the refrigerating room blowing damper 9a and the refrigerating room returning damper 9b, and closing the freezing room blowing damper 8a and the refrigerating room returning damper 8b for other temperature zones. At this time, the number of revolutions of the internal circulation fan 7 may be controlled by a preset number of revolutions or a temperature detected by an evaporator temperature sensor. Also, the throttle of the electric expansion valve 3b may be adjusted by the temperature detected by the evaporator temperature sensor or the temperature of the refrigerator temperature sensor (not shown).
[0020]
By doing so, it is possible to prevent high-temperature cold air from flowing into the low-temperature freezer compartment when cooling the high-temperature refrigerator compartment, thereby minimizing the temperature rise in the freezer compartment. Can be. Further, since the evaporator temperature can be changed in accordance with the temperatures of the cooling chambers in different temperature zones, the operation can be efficiently performed on the refrigeration cycle, and the power consumption can be reduced.
[0021]
Next, another embodiment of the present invention will be described with reference to FIGS.
FIG. 5 is a configuration diagram of a refrigeration cycle of a refrigerator according to another embodiment of the present invention. In the figure, components having the same reference numerals as those in FIG. 1 are the same as those in the previous embodiment, and the description thereof will be omitted. FIG. 5 has two temperature zones as in FIG. 1, and the respective temperatures are controlled by adjusting the pressure reduction amount of the refrigerant, the air volume of the cool air, and the cooling time. 1 is different from the one shown in FIG. 1 in that the decompression device 3 is provided with a freezing room capillary tube 3c and a refrigerator room capillary tube 3d in parallel, and the flow of refrigerant is controlled by a freezing room capillary tube 3c or a refrigerator room. The configuration is such that the capillary tube 3d, or both, and the switchable electric switching valve 10 are connected.
[0022]
Next, the operation of the refrigerator will be described with reference to FIG.
When the temperature of a cooling room (for example, a freezing room) in a low temperature zone becomes higher than a certain set temperature and only the freezing room needs to be cooled, the electric switching valve 10 is switched to the freezing room capillary tube 3c side. In order to increase the flow path resistance and to operate the refrigeration cycle of the refrigerator at the same time as or before and after increasing the flow path resistance, the compressor 1 is turned on (if the compressor 1 is already turned on, And the inside circulation fan 7 is turned on. In this case, after the temperature of the evaporator 4 is turned on after the compressor 1 is turned on, the temperature detected by an evaporator temperature sensor (not shown) attached to the evaporator 4 becomes equal to or lower than a preset temperature, and then the circulation in the refrigerator is performed. The fan 7 may be turned on. At this time, the number of revolutions of the internal circulation fan 7 may be controlled by a preset number of revolutions or a temperature detected by an evaporator temperature sensor. At the same time, the freezer compartment air blow damper 8a and the freezer compartment return damper 8b are opened, and the other cooler room air blower dampers 9a and the cooler room return dampers 9b are closed to cool only the freezer compartment. .
[0023]
On the other hand, when a cooling room (for example, a refrigeration room) having a high temperature zone becomes higher than a certain set temperature and only the refrigeration room needs to be cooled, the electric switching valve 10 is switched to the refrigeration room capillary tube 3d side. To reduce the flow path resistance, open the refrigeration room air damper 9a and the refrigeration room return damper 9b, and close the freezing room air blast damper 8a and the freezer room return damper 8b for the other temperature zones. Only cool the room. At this time, the number of revolutions of the internal circulation fan 7 may be controlled by a preset number of revolutions or a temperature detected by an evaporator temperature sensor. Further, the electric switching valve 10 is caused to flow through both the freezer room capillary tube 3c and the refrigerator room capillary tube 3d depending on the temperature detected by the evaporator temperature sensor or the temperature of the refrigerator room temperature detection sensor (not shown), The flow path resistance may be adjusted to be small.
[0024]
By doing so, it is possible to prevent high-temperature cold air from flowing into the low-temperature freezer compartment when cooling the high-temperature refrigerator compartment, thereby minimizing the temperature rise in the freezer compartment. Can be. Further, since the evaporator temperature can be changed in accordance with the temperatures of the cooling chambers in different temperature zones, the operation can be efficiently performed on the refrigeration cycle, and the power consumption can be reduced.
[0025]
In the above embodiment, when all the chambers in each temperature zone are cooled down to the set temperature or less and the compressor is stopped, the freezing room blowing damper 8a, the freezing room returning damper 8b, the refrigerating room blowing damper are used. 9a, by closing all the dampers of the refrigerating room return damper 9b, the high temperature refrigerant on the condenser side flows into the evaporator as the pressure in the refrigeration cycle balances after the compressor stops. Due to the natural convection from the high-temperature evaporator generated by the high temperature of the evaporator or the evaporator at the time of the defrosting operation, it is possible to prevent warm air from flowing into the cooling chamber. Temperature rise can be minimized.
[0026]
【The invention's effect】
According to the present invention, when cooling the cooling chambers of two or more different temperature zones, the evaporator temperatures are controlled to match the respective temperature zones, and on the refrigeration cycle, each cooling chamber is efficiently cooled, and the cooling rate is reduced. Refrigerator that can increase the heat load on the cooling chamber in the low temperature zone while cooling the cooling chamber in the high temperature zone while improving the cooling cycle in the high temperature zone, thereby improving the efficiency of the refrigeration cycle and reducing the power consumption. Can be provided.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a refrigeration cycle of a refrigerator according to a first embodiment of the present invention.
FIG. 2 is an air path configuration diagram of the refrigerator shown in FIG.
FIG. 3 is a time chart of an operation example of the refrigerator shown in FIG. 1;
FIG. 4 is a configuration diagram of a refrigeration cycle of a refrigerator according to a second embodiment of the present invention.
FIG. 5 is a configuration diagram of a refrigeration cycle of a refrigerator according to a third embodiment of the present invention.
FIG. 6 is a time chart of an operation example of the refrigerator shown in FIGS. 4 and 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Compressor, 2 ... Condenser, 3 ... Decompression device, 3a ... Capillary tube, 3b ... Electric expansion valve, 3c ... Freezing room capillary tube, 3d ... Refrigerator room capillary tube, 4 ... Evaporator, 5 ... Refrigerant Circuit 6 ... Cold air ventilation path, 6a ... Cold air ventilation path, 6b ... Cold air return path, 7 ... Circulation fan inside the refrigerator, 8a ... Freezing room ventilation damper, 8b ... Refrigeration room ventilation damper, 9a ... Freezing room return Damper, 9b: Return damper for refrigerator compartment, 10: Electric switching valve

Claims (3)

圧縮機と、凝縮器と、減圧装置と、蒸発器を順に直列に接続した冷媒回路を有する冷凍サイクルを備えると共に、前記蒸発器によって冷却された冷気を、二つ以上の異なる温度帯の冷却室に循環させる庫内循環ファンを備え、それらを制御する制御装置を備えた冷蔵庫において、前記蒸発器および前記庫内循環ファンを備えた冷気通風路に、前記二つ以上の異なる温度帯の冷却室に対する冷気送風路および冷気戻り風路それぞれについて開放あるいは遮断を選択できる送風ダンパおよび戻りダンパを設け、前記二つ以上の異なる温度帯の冷却室に適した温度となるように、前記送風ダンパおよび前記戻りダンパの開閉を制御する冷蔵庫。A compressor, a condenser, a decompression device, and a refrigerating cycle having a refrigerant circuit in which an evaporator is connected in series in order, and cool air cooled by the evaporator is cooled in two or more different temperature zones. A refrigerator having a circulating fan in the refrigerator, and a control device for controlling the chiller, wherein the cooling chambers of the two or more different temperature zones are provided in a cool air ventilation passage having the evaporator and the circulating fan in the refrigerator. A blow damper and a return damper that can be selected to be opened or shut off for each of the cool air blow path and the cool air return wind path are provided, and the blow damper and the cooler are arranged to have a temperature suitable for the cooling chambers in the two or more different temperature zones. A refrigerator that controls the opening and closing of the return damper. 圧縮機と、凝縮器と、減圧装置と、蒸発器を順に直列に接続した冷媒回路を有する冷凍サイクルを備えると共に、前記蒸発器によって冷却された冷気を、二つ以上の異なる温度帯の冷却室に循環させる庫内循環ファンを備え、それらを制御する制御装置を備えた冷蔵庫において、前記減圧装置として、冷媒回路の蒸発器側に一本のキャピラリーチューブと前記キャピラリーチューブに直列に設けた電動膨張弁とを備え、前記蒸発器および前記庫内循環ファンを備えた冷気通風路に、前記二つ以上の異なる温度帯の冷却室に対する冷気送風路および冷気戻り風路それぞれについて開放あるいは遮断を選択できる送風ダンパおよび戻りダンパを設け、前記電動膨張弁により減圧量を可変とし、前記蒸発器を異なる温度に変化させ異なる温度の冷気を作るとともに、前記二つ以上の異なる温度帯の冷却室に適した温度の冷気を送風するように、前記送風ダンパおよび前記戻りダンパの開閉を連動させるように制御する冷蔵庫。A compressor, a condenser, a decompression device, and a refrigerating cycle having a refrigerant circuit in which an evaporator is connected in series in order, and cool air cooled by the evaporator is cooled in two or more different temperature zones. A refrigerator equipped with an internal circulation fan that circulates air through a refrigerator, and a control device that controls them, as the pressure reducing device, one capillary tube on the evaporator side of the refrigerant circuit and an electric expansion provided in series with the capillary tube. A valve, and in the cool air passage provided with the evaporator and the in-compartment circulation fan, it is possible to select to open or shut off each of the cool air blow passage and the cool air return passage for the cooling chambers in the two or more different temperature zones. A blow damper and a return damper are provided, the amount of pressure reduction is made variable by the electric expansion valve, the evaporator is changed to a different temperature, and cold air of a different temperature is changed. Making with the to blow two or more different temperature zones cold air temperature suitable for the cooling chamber of a refrigerator to control so as to interlock the opening and closing of the blower damper and the return damper. 圧縮機と、凝縮器と、減圧装置と、蒸発器を順に直列に接続した冷媒回路を有する冷凍サイクルを備えると共に、前記蒸発器によって冷却された冷気を、二つ以上の異なる温度帯の冷却室に循環させる庫内循環ファンを備え、それらを制御する制御装置を備えた冷蔵庫において、前記減圧装置として、冷媒回路の蒸発器側に少なくとも前記二つの異なる冷却室の数のキャピラリーチューブとこれらの前記キャピラリーチューブを選択する電動切換弁を設け、前記蒸発器および前記庫内循環ファンを備えた冷気通風路に、前記二つ以上の異なる温度帯の冷却室に対する冷気送風路および冷気戻り風路それぞれについて開放あるいは遮断を選択できる送風ダンパおよび戻りダンパを設け、前記キャピラリーチューブの選択により減圧量を可変とし、前記蒸発器を異なる温度に変化させ異なる温度の冷気を作るとともに、前記二つ以上の異なる温度帯の冷却室に適した温度の冷気を送風するように、前記送風ダンパおよび前記戻りダンパの開閉を連動させるように制御する冷蔵庫。A compressor, a condenser, a decompression device, and a refrigerating cycle having a refrigerant circuit in which an evaporator is connected in series in order, and cool air cooled by the evaporator is cooled in two or more different temperature zones. A refrigerator provided with a circulating fan for circulating in the refrigerator, and a control device for controlling them, wherein the decompression device includes at least two different number of capillary tubes on the evaporator side of the refrigerant circuit, and An electric switching valve for selecting a capillary tube is provided, and in the cool air ventilation path including the evaporator and the in-compartment circulation fan, a cold air blowing path and a cold air returning path for the cooling chambers in the two or more different temperature zones are provided. A blow damper and a return damper that can be selected to open or shut off are provided, and the pressure reduction amount is made variable by selecting the capillary tube. The evaporator is changed to a different temperature to create cold air at different temperatures, and the blower damper and the return damper are opened and closed so as to blow cool air at a temperature suitable for the cooling chambers in the two or more different temperature zones. Refrigerator controlled to be linked.
JP2002232260A 2002-08-09 2002-08-09 Refrigerator Pending JP2004069245A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010159902A (en) * 2009-01-07 2010-07-22 Panasonic Corp Damper device and article storage device
JP2012047363A (en) * 2010-08-25 2012-03-08 Hitachi Appliances Inc Refrigerator
WO2013046580A1 (en) 2011-09-29 2013-04-04 パナソニック株式会社 Refrigerator
JP2013167383A (en) * 2012-02-15 2013-08-29 Hitachi Appliances Inc Refrigerator
CN105222478A (en) * 2014-03-19 2016-01-06 天津大学 Utilize the method that freezer outside air auxiliary electrical heater defrosts
CN114739103A (en) * 2022-04-06 2022-07-12 海信(山东)冰箱有限公司 Refrigerator and refrigerator control method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010159902A (en) * 2009-01-07 2010-07-22 Panasonic Corp Damper device and article storage device
JP2012047363A (en) * 2010-08-25 2012-03-08 Hitachi Appliances Inc Refrigerator
WO2013046580A1 (en) 2011-09-29 2013-04-04 パナソニック株式会社 Refrigerator
JP2013072617A (en) * 2011-09-29 2013-04-22 Panasonic Corp Refrigerator
CN103827608A (en) * 2011-09-29 2014-05-28 松下电器产业株式会社 Refrigerator
EP2762808A4 (en) * 2011-09-29 2015-06-17 Panasonic Corp Refrigerator
CN103827608B (en) * 2011-09-29 2016-01-20 松下电器产业株式会社 Freezer
JP2013167383A (en) * 2012-02-15 2013-08-29 Hitachi Appliances Inc Refrigerator
CN105222478A (en) * 2014-03-19 2016-01-06 天津大学 Utilize the method that freezer outside air auxiliary electrical heater defrosts
CN105222478B (en) * 2014-03-19 2017-10-17 天津大学 The method defrosted using freezer outside air auxiliary electrical heater
CN114739103A (en) * 2022-04-06 2022-07-12 海信(山东)冰箱有限公司 Refrigerator and refrigerator control method

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