JP2003106693A - Refrigerator - Google Patents
RefrigeratorInfo
- Publication number
- JP2003106693A JP2003106693A JP2001294206A JP2001294206A JP2003106693A JP 2003106693 A JP2003106693 A JP 2003106693A JP 2001294206 A JP2001294206 A JP 2001294206A JP 2001294206 A JP2001294206 A JP 2001294206A JP 2003106693 A JP2003106693 A JP 2003106693A
- Authority
- JP
- Japan
- Prior art keywords
- evaporator
- outlet
- suction pipe
- refrigerant
- stage compression
- 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
Links
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、２段圧縮コンプレ
ッサと、凝縮器と、冷蔵室用蒸発器と、冷凍室用蒸発器
とから構成された冷凍サイクルを備える冷蔵庫に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator having a refrigerating cycle including a two-stage compression compressor, a condenser, a refrigerator compartment evaporator, and a freezer compartment evaporator.
【０００２】[0002]
【従来の技術】この種の冷蔵庫に組み込まれた冷凍サイ
クルの一例を、図４に示す。この冷凍サイクル１におい
ては、図４に示すように、２段圧縮コンプレッサ２の高
圧側吐出口２ａから吐出された高圧ガス冷媒は、凝縮器
３内で凝縮されて２相冷媒になる。この高圧２相冷媒
は、第１の絞り装置４で減圧されて中間圧の２相冷媒と
なり、この２相冷媒は冷蔵室用蒸発器５へ入る。2. Description of the Related Art An example of a refrigeration cycle incorporated in a refrigerator of this type is shown in FIG. In the refrigeration cycle 1, as shown in FIG. 4, the high-pressure gas refrigerant discharged from the high-pressure side discharge port 2a of the two-stage compression compressor 2 is condensed in the condenser 3 to become a two-phase refrigerant. This high-pressure two-phase refrigerant is decompressed by the first expansion device 4 to become an intermediate-pressure two-phase refrigerant, and this two-phase refrigerant enters the refrigerator compartment evaporator 5.
【０００３】冷蔵室用蒸発器５内では、冷媒は、その一
部が蒸発し、２相状態で気液分離器６へ入り、液冷媒と
ガス冷媒に分離される。気液分離器６内で分離されたガ
ス冷媒は、Ｒサクションパイプ（冷蔵室側サクションパ
イプ）７を経て２段圧縮コンプレッサ２の中間圧側吸込
口２ｂに入る。また、気液分離器６内で分離された液冷
媒は、第２の絞り装置８で減圧されて低圧の２相冷媒と
なり、この２相冷媒は冷凍室用蒸発器９へ入る。冷凍室
用蒸発器９内で蒸発した冷媒は、Ｆサクションパイプ
（冷凍室側サクションパイプ）１０を経て２段圧縮コン
プレッサ２の低圧側吸込口２ｃに入る。In the evaporator 5 for the refrigerating compartment, a part of the refrigerant evaporates, enters the gas-liquid separator 6 in a two-phase state, and is separated into a liquid refrigerant and a gas refrigerant. The gas refrigerant separated in the gas-liquid separator 6 enters the intermediate pressure side suction port 2b of the two-stage compression compressor 2 through the R suction pipe (refrigerating chamber side suction pipe) 7. The liquid refrigerant separated in the gas-liquid separator 6 is decompressed by the second expansion device 8 to become a low-pressure two-phase refrigerant, and this two-phase refrigerant enters the freezer compartment evaporator 9. The refrigerant evaporated in the freezer compartment evaporator 9 passes through the F suction pipe (freezer compartment side suction pipe) 10 and enters the low pressure side suction port 2c of the two-stage compression compressor 2.
【０００４】そして、２段圧縮コンプレッサ２内におい
ては、低圧側吸込口２ｃから吸い込まれた低圧冷媒は、
第１段圧縮室（図示しない）で中間圧まで加圧される。
この中間圧まで加圧された中間圧冷媒は、中間圧側吸込
口２ｂから吸い込まれた中間圧冷媒と合流して混合され
る。この合流混合された冷媒は、第２段圧縮室（図示し
ない）で高圧まで加圧されてから、高圧側吐出口２ａか
ら吐出されるように構成されている。In the two-stage compression compressor 2, the low pressure refrigerant sucked from the low pressure side suction port 2c is
It is pressurized to an intermediate pressure in the first stage compression chamber (not shown).
The intermediate pressure refrigerant pressurized to the intermediate pressure joins and is mixed with the intermediate pressure refrigerant sucked from the intermediate pressure side suction port 2b. The combined and mixed refrigerant is pressurized to a high pressure in a second-stage compression chamber (not shown) and then discharged from the high-pressure side discharge port 2a.
【０００５】次に、上記２段圧縮コンプレッサ２を有す
る冷凍サイクルの他の例を、図５に示す。この冷凍サイ
クル１１においては、図５に示すように、２段圧縮コン
プレッサ２の高圧側吐出口２ａから吐出された高圧ガス
冷媒は、凝縮器３内で凝縮されて２相冷媒になる。この
高圧２相冷媒は、分流器１２で２つに分流されて、第１
の絞り装置４と第２の絞り装置８とに入る。Next, another example of the refrigerating cycle having the two-stage compression compressor 2 is shown in FIG. In this refrigeration cycle 11, as shown in FIG. 5, the high-pressure gas refrigerant discharged from the high-pressure side discharge port 2a of the two-stage compression compressor 2 is condensed in the condenser 3 to become a two-phase refrigerant. This high-pressure two-phase refrigerant is divided into two by the flow divider 12 to obtain the first
The second diaphragm device 4 and the second diaphragm device 8 are entered.
【０００６】第１の絞り装置４に入った高圧２相冷媒
は、ここで減圧されて中間圧の２相冷媒となって冷蔵室
用蒸発器５へ入る。この冷蔵室用蒸発器５内で、冷媒は
蒸発し、Ｒサクションパイプ７を経て２段圧縮コンプレ
ッサ２の中間圧側吸込口２ｂに入る。また、第２の絞り
装置８に入った高圧２相冷媒は、ここで減圧されて低圧
の２相冷媒となって冷凍室用蒸発器９へ入る。この冷凍
室用蒸発器９内で、冷媒は蒸発し、Ｆサクションパイプ
１０を経て２段圧縮コンプレッサ２の低圧側吸込口２ｃ
に入る。尚、２段圧縮コンプレッサ２内における冷媒の
加圧動作は、上述した冷凍サイクル１の２段圧縮コンプ
レッサ２と同じである。The high-pressure two-phase refrigerant that has entered the first expansion device 4 is decompressed here to become an intermediate-pressure two-phase refrigerant and enters the refrigerator compartment evaporator 5. In the refrigerator compartment evaporator 5, the refrigerant evaporates and enters the intermediate pressure side suction port 2b of the two-stage compression compressor 2 through the R suction pipe 7. Further, the high-pressure two-phase refrigerant that has entered the second expansion device 8 is decompressed here to become a low-pressure two-phase refrigerant and enters the freezer compartment evaporator 9. In the evaporator 9 for the freezer compartment, the refrigerant evaporates, passes through the F suction pipe 10 and the low pressure side suction port 2c of the two-stage compression compressor 2.
to go into. The pressurizing operation of the refrigerant in the two-stage compression compressor 2 is the same as that of the two-stage compression compressor 2 of the refrigeration cycle 1 described above.
【０００７】このような構成の冷凍サイクル１または１
１の場合、冷蔵室用蒸発器５の設定温度と冷凍室用蒸発
器９の設定温度をそれぞれかなり自由に設定できると共
に、各蒸発器５、９を連続して冷却できる。このため、
冷凍サイクル１、１１の効率を高めることができると共
に、冷蔵室用蒸発器５の設定温度を高く設定することが
可能になることから、冷蔵室用蒸発器５への着霜量を減
らして冷蔵室内の湿度を高く保つことができる。尚、こ
のような冷凍サイクルに関連する技術を示す公報とし
て、特開平１１−２２３３９７号公報がある。The refrigeration cycle 1 or 1 having such a configuration
In the case of 1, the set temperatures of the refrigerator compartment evaporator 5 and the freezer compartment evaporator 9 can be set considerably freely, and the evaporators 5 and 9 can be continuously cooled. For this reason,
Since the efficiency of the refrigeration cycles 1 and 11 can be improved and the set temperature of the refrigerator compartment evaporator 5 can be set high, the amount of frost formed on the refrigerator compartment evaporator 5 can be reduced to achieve refrigeration. The humidity in the room can be kept high. Incidentally, as a publication showing a technique related to such a refrigeration cycle, there is JP-A-11-223397.
【０００８】[0008]
【発明が解決しようとする課題】しかし、上記構成の冷
凍サイクル１、１１において、冷凍室に過大な負荷がか
かった場合、冷凍室用蒸発器９内を冷媒が流れ難くな
り、冷凍室を効果的に冷却できなくなること、即ち、冷
凍能力不足が発生することがあった。この冷凍能力不足
を補うために、２段圧縮コンプレッサ２の回転数を上げ
るように制御する対策が考えられる。しかし、このよう
に制御すると、冷蔵室内が冷却されすぎたり、冷蔵室用
蒸発器５で冷媒が蒸発しきれなくなり、２段圧縮コンプ
レッサ２の中間圧側吸込口２ｂへの液戻りやＲサクショ
ンパイプ７の結露を引き起こすおそれがあった。However, in the refrigerating cycles 1 and 11 having the above-mentioned structure, when an excessive load is applied to the freezing compartment, it becomes difficult for the refrigerant to flow in the evaporator 9 for the freezing compartment, and the refrigerating compartment becomes effective. In some cases, the cooling cannot be performed effectively, that is, the freezing capacity is insufficient. In order to compensate for this lack of refrigerating capacity, it is conceivable to take measures to increase the rotation speed of the two-stage compression compressor 2. However, if controlled in this way, the refrigerating chamber will be over-cooled, or the refrigerating chamber evaporator 5 will not be able to completely evaporate the refrigerant, and the liquid return to the intermediate pressure side suction port 2b of the two-stage compression compressor 2 and the R suction pipe 7 will occur. Could cause dew condensation.
【０００９】尚、冷凍サイクル１において、上記制御を
行うと、冷蔵室用蒸発器５から出る冷媒の中に占める液
冷媒の割合が多くなり、気液分離器６で相分離しきれな
くなって、Ｒサクションパイプ７に２相冷媒が流れるよ
うになる。このため、上記冷凍サイクル１１の場合と同
様な問題点を生ずる。If the above control is performed in the refrigeration cycle 1, the proportion of the liquid refrigerant in the refrigerant discharged from the refrigerating compartment evaporator 5 increases, and the gas-liquid separator 6 cannot complete the phase separation. The two-phase refrigerant flows through the R suction pipe 7. Therefore, the same problem as in the case of the refrigeration cycle 11 occurs.
【００１０】そこで、本発明の目的は、２段圧縮コンプ
レッサを用いた冷凍サイクルを備えてなるものにおい
て、冷凍室に過大な負荷がかかった場合に、２段圧縮コ
ンプレッサの中間圧側吸込口への液戻りや冷蔵室用サク
ションパイプの結露を防止することができる冷蔵庫を提
供するにある。Therefore, an object of the present invention is to provide a refrigeration cycle using a two-stage compression compressor, and when an excessive load is applied to the refrigeration chamber, the intermediate pressure side suction port of the two-stage compression compressor is introduced. Another object of the present invention is to provide a refrigerator capable of preventing liquid return and dew condensation on the suction pipe for the refrigerator compartment.
【００１１】[0011]
【課題を解決するための手段】本発明の冷蔵庫は、低圧
側吸込口と中間圧側吸込口とを有する２段圧縮コンプレ
ッサと、凝縮器と、冷蔵室用蒸発器と、冷凍室用蒸発器
とから構成された冷凍サイクルを備えてなるものにおい
て、前記冷蔵室用蒸発器から出た冷媒と、前記冷凍室用
蒸発器から出た冷媒を熱交換させるように構成したとこ
ろに特徴を有する。A refrigerator of the present invention comprises a two-stage compression compressor having a low-pressure side suction port and an intermediate-pressure side suction port, a condenser, a refrigerator compartment evaporator, and a freezer compartment evaporator. The refrigerating cycle constituted by the above is characterized in that the refrigerant discharged from the refrigerating compartment evaporator and the refrigerant discharged from the freezing compartment evaporator are heat-exchanged.
【００１２】上記構成において、冷凍室に過大な負荷が
かかった場合、２段圧縮コンプレッサの回転数を上げる
ような制御を行うことにより、冷蔵室用蒸発器で冷媒が
蒸発しきれなくなることがあったとしても、冷蔵室用蒸
発器から出た冷媒と、冷凍室用蒸発器から出た冷媒を熱
交換させるので、２段圧縮コンプレッサの低圧側吸込口
の冷媒密度を大きくすることができ、これにより、冷凍
室用蒸発器の冷媒流量を増加させることができ、冷凍室
の冷却能力を大きくすることができる。そして、中間圧
側吸込口への液戻りや冷蔵室用サクションパイプの結露
を防止することができる。In the above structure, when an excessive load is applied to the freezing compartment, the refrigerating compartment evaporator may not be able to completely evaporate the refrigerant by performing control to increase the rotation speed of the two-stage compression compressor. Even if it does, since the refrigerant discharged from the refrigerator evaporator and the refrigerant discharged from the freezer evaporator are heat-exchanged, it is possible to increase the refrigerant density at the low pressure side suction port of the two-stage compression compressor. As a result, the refrigerant flow rate of the freezer compartment evaporator can be increased, and the cooling capacity of the freezer compartment can be increased. Then, it is possible to prevent the liquid from returning to the suction port on the intermediate pressure side and the dew condensation on the suction pipe for the refrigerating compartment.
【００１３】また、上記構成の場合、前記冷凍サイクル
を、前記２段圧縮コンプレッサの吐出口を前記凝縮器に
接続し、前記凝縮器の出口を第１の絞り装置に接続し、
前記第１の絞り装置の出口を前記冷蔵室用蒸発器に接続
し、前記冷蔵室用蒸発器の出口を第１の分流器に接続
し、前記第１の分流器の一方の出口を冷蔵室側サクショ
ンパイプを経て前記２段圧縮コンプレッサの中間圧側吸
込口に接続し、前記第１の分流器の他方の出口を第２の
絞り装置に接続し、前記第２の絞り装置の出口を前記冷
凍室用冷却器に接続し、前記冷凍室用冷却器の出口を冷
凍室側サクションパイプを経て前記２段圧縮コンプレッ
サの低圧側吸込口に接続するように構成し、そして、前
記冷蔵室側サクションパイプと前記冷凍室側サクション
パイプを熱交換させるように構成することが好ましい。
この場合、前記第１の分流器を、気液分離器で構成する
ことが良い構成である。Further, in the case of the above construction, in the refrigeration cycle, the discharge port of the two-stage compression compressor is connected to the condenser, and the outlet of the condenser is connected to the first expansion device,
An outlet of the first expansion device is connected to the refrigerating compartment evaporator, an outlet of the refrigerating compartment evaporator is connected to a first flow divider, and one outlet of the first diverter is connected to the refrigerating compartment. It is connected to the intermediate pressure side suction port of the two-stage compression compressor via the side suction pipe, the other outlet of the first flow divider is connected to the second expansion device, and the outlet of the second expansion device is connected to the refrigeration system. And a refrigerating compartment side suction pipe connected to a low temperature side suction pipe of the two-stage compression compressor via a freezing compartment side suction pipe. It is preferable that the suction pipe on the freezer side is exchanged with heat.
In this case, it is preferable that the first flow divider be a gas-liquid separator.
【００１４】また、前記冷凍サイクルを、前記２段圧縮
コンプレッサの吐出口を前記凝縮器に接続し、前記凝縮
器の出口を第２の分流器に接続し、前記第２の分流器の
一方の出口を第１の絞り装置に接続し、前記第１の絞り
装置の出口を前記冷蔵室用蒸発器に接続し、前記冷蔵室
用蒸発器の出口を冷蔵室側サクションパイプを経て前記
２段圧縮コンプレッサの中間圧側吸込口に接続し、前記
第２の分流器の他方の出口を第２の絞り装置に接続し、
前記第２の絞り装置の出口を前記冷凍室用冷却器に接続
し、前記冷凍室用冷却器の出口を冷凍室側サクションパ
イプを経て前記２段圧縮コンプレッサの低圧側吸込口に
接続するように構成し、そして、前記冷蔵室側サクショ
ンパイプと前記冷凍室側サクションパイプを熱交換させ
るように構成することが好ましい。In the refrigeration cycle, the discharge port of the two-stage compression compressor is connected to the condenser, the outlet of the condenser is connected to a second flow divider, and one of the second flow dividers is connected. An outlet is connected to a first expansion device, an outlet of the first expansion device is connected to the refrigerating compartment evaporator, and an outlet of the refrigerating compartment evaporator is passed through the refrigerating compartment side suction pipe to the two-stage compression. Connected to the intermediate pressure side suction port of the compressor, and connecting the other outlet of the second flow divider to the second expansion device,
The outlet of the second expansion device is connected to the freezer compartment cooler, and the outlet of the freezer compartment cooler is connected to the low pressure side inlet of the two-stage compression compressor via the freezer compartment side suction pipe. Preferably, the refrigerating compartment side suction pipe and the freezing compartment side suction pipe are heat-exchanged.
【００１５】更に、前記冷媒として炭化水素系冷媒を用
いることがより一層好ましい構成である。Furthermore, it is an even more preferable structure to use a hydrocarbon type refrigerant as the refrigerant.
【００１６】[0016]
【発明の実施の形態】以下、本発明の第１の実施例につ
いて、図１及び図２を参照しながら説明する。尚、従来
構成（図４参照）と同一構成には、同一符号を付してい
る。まず、図２は本実施例の冷蔵庫の全体構成を概略的
に示す縦断側面図である。この図２に示すように、本実
施例の冷蔵庫の本体２１は、断熱箱体から構成されてお
り、その内部中間部には断熱仕切壁２２が一体に形成さ
れている。この断熱仕切壁２２により冷蔵庫本体２１内
の上下部に異なる温度空間が設定されている。BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. The same components as those of the conventional configuration (see FIG. 4) are designated by the same reference numerals. First, FIG. 2 is a vertical side view schematically showing the overall configuration of the refrigerator of this embodiment. As shown in FIG. 2, the main body 21 of the refrigerator of the present embodiment is composed of a heat insulating box, and a heat insulating partition wall 22 is integrally formed at an inner middle portion thereof. The heat insulating partition wall 22 sets different temperature spaces in the upper and lower portions of the refrigerator main body 21.
【００１７】冷蔵庫本体１内の断熱仕切壁２２の上部空
間には、冷蔵室２３及び野菜室２４が上下に形成されて
いる。また、断熱仕切壁２２の下部空間には、２つの冷
凍室２５、２６が上下に形成されている。これら各室２
３〜２６の前面は、扉２７〜３０によって開閉されるよ
うに構成されている。A refrigerating compartment 23 and a vegetable compartment 24 are vertically formed in the upper space of the heat insulating partition wall 22 in the refrigerator body 1. Further, two freezing chambers 25 and 26 are vertically formed in a space below the heat insulating partition wall 22. Each of these rooms 2
The front surfaces of 3 to 26 are configured to be opened and closed by the doors 27 to 30.
【００１８】また、野菜室２４の奥部には、冷蔵室用蒸
発器室３１が形成されており、この冷蔵室用蒸発器室３
１内の下部に冷蔵室用蒸発器５が配設されていると共
に、上部に冷蔵室用循環ファン３２が配設されている。
この冷蔵室用循環ファン３２は、例えばインバータによ
り回転速度を可変制御することが可能なように構成され
ている。尚、冷蔵室２３の後面部分には冷気ダクト３３
が設けられており、この冷気ダクト１８には複数の吹出
口３３ａが形成されている。A refrigerator compartment evaporator chamber 31 is formed at the back of the vegetable compartment 24, and the refrigerator compartment evaporator chamber 3 is formed.
A refrigerating compartment evaporator 5 is arranged in the lower part of the inside of the inside 1, and a refrigerating compartment circulation fan 32 is arranged in the upper part.
The refrigerating room circulation fan 32 is configured such that the rotation speed can be variably controlled by an inverter, for example. In addition, a cold air duct 33 is provided on the rear surface of the refrigerating chamber 23.
Is provided, and a plurality of air outlets 33a are formed in the cold air duct 18.
【００１９】一方、冷凍室２５、２６の奥部には、冷凍
室用蒸発器室３４が形成されており、この冷凍室用蒸発
器室３４内の下部に冷凍室用蒸発器９が配設されている
と共に、上部に冷凍室用循環ファン３５が配設されてい
る。この冷凍室用循環ファン３５は、例えばインバータ
により回転速度を可変制御することが可能なように構成
されている。On the other hand, the freezer compartment evaporator chamber 34 is formed in the inner part of the freezer compartments 25 and 26, and the freezer compartment evaporator 9 is arranged in the lower part of the freezer compartment evaporator room 34. At the same time, the circulation fan 35 for the freezer compartment is arranged in the upper part. This freezer compartment circulation fan 35 is configured such that the rotation speed can be variably controlled by an inverter, for example.
【００２０】尚、冷蔵庫本体２１の下部には、機械室３
６が形成されており、この機械室３６内には、２段圧縮
コンプレッサ２と凝縮器３が配設されている。そして、
２段圧縮コンプレッサ２は、例えばインバータにより回
転速度を可変制御することが可能なように構成されてい
る。In the lower part of the refrigerator body 21, the machine room 3
6 is formed, and the two-stage compression compressor 2 and the condenser 3 are arranged in the machine chamber 36. And
The two-stage compression compressor 2 is configured so that the rotation speed can be variably controlled by an inverter, for example.
【００２１】次に、上記冷蔵庫に組み込まれた冷凍サイ
クルについて、図１を参照して説明する。この図１に示
すように、上記冷蔵庫の冷凍サイクル３７においては、
２段圧縮コンプレッサ２の高圧側吐出口２ａを凝縮器３
に接続し、この凝縮器３の出口を第１の絞り装置４に接
続し、この第１の絞り装置４の出口を冷蔵室用蒸発器５
に接続し、この冷蔵室用蒸発器５の出口を気液分離器
（第１の分流器）６に接続している。尚、上記第１の絞
り装置４は、例えばキャピラリーチューブで構成されて
いる。Next, the refrigeration cycle incorporated in the refrigerator will be described with reference to FIG. As shown in FIG. 1, in the refrigerating cycle 37 of the refrigerator,
The high-pressure side discharge port 2a of the two-stage compression compressor 2 is connected to the condenser 3
And the outlet of the condenser 3 is connected to the first expansion device 4, and the outlet of the first expansion device 4 is connected to the refrigerator compartment evaporator 5.
And the outlet of the refrigerator compartment evaporator 5 is connected to a gas-liquid separator (first flow divider) 6. The first diaphragm device 4 is composed of, for example, a capillary tube.
【００２２】そして、上記気液分離器６の一方の出口を
Ｒサクションパイプ（冷蔵室側サクションパイプ）７を
経て２段圧縮コンプレッサ２の中間圧側吸込口２ｂに接
続している。また、気液分離器６の他方の出口を第２の
絞り装置８に接続し、この第２の絞り装置８の出口を冷
凍室用蒸発器９に接続し、この冷凍室用蒸発器９の出口
をＦサクションパイプ（冷凍室側サクションパイプ）１
０を経て前記２段圧縮コンプレッサ２の低圧側吸込口２
ｃに接続している。尚、第２の絞り装置８は、例えばキ
ャピラリーチューブで構成されている。Then, one outlet of the gas-liquid separator 6 is connected to the intermediate pressure side suction port 2b of the two-stage compression compressor 2 through the R suction pipe (refrigerating chamber side suction pipe) 7. The other outlet of the gas-liquid separator 6 is connected to the second expansion device 8, the outlet of the second expansion device 8 is connected to the freezer compartment evaporator 9, and the freezer compartment evaporator 9 is connected. Outlet F suction pipe (suction pipe on the freezer side) 1
Low-pressure side suction port 2 of the two-stage compression compressor 2
connected to c. The second expansion device 8 is composed of, for example, a capillary tube.
【００２３】更に、本実施例においては、前記Ｒサクシ
ョンパイプ７内の冷媒と前記Ｆサクションパイプ１０内
の冷媒を熱交換させるように構成している。具体的に
は、上記２つのパイプ７、１０を所定長さだけ隣接させ
て並べ、例えば半田付けにより両者を接合している（図
１における２点鎖線で囲まれた部分を参照）。これによ
り、冷蔵室用蒸発器５から出た冷媒と、冷凍室用蒸発器
９から出た冷媒とが熱交換される構成となっている。Further, in this embodiment, the refrigerant in the R suction pipe 7 and the refrigerant in the F suction pipe 10 are heat-exchanged. Specifically, the two pipes 7 and 10 are arranged adjacent to each other for a predetermined length and are joined by, for example, soldering (see a portion surrounded by a chain double-dashed line in FIG. 1). As a result, the refrigerant discharged from the refrigerator compartment evaporator 5 and the refrigerant discharged from the freezer compartment evaporator 9 are heat-exchanged.
【００２４】尚、上記半田付け以外の他のろう付け方法
でＲサクションパイプ７とＦサクションパイプ１０とを
接合しても良いし、接着剤等で両者を接着しても良い。
また、適当な熱交換器等を使用してＲサクションパイプ
７内の冷媒とＦサクションパイプ１０内の冷媒との熱交
換を実現するように構成しても良い。The R suction pipe 7 and the F suction pipe 10 may be joined by a brazing method other than the above-mentioned soldering, or they may be joined by an adhesive or the like.
Further, the heat exchange between the refrigerant in the R suction pipe 7 and the refrigerant in the F suction pipe 10 may be realized by using an appropriate heat exchanger or the like.
【００２５】上記した構成の冷凍サイクル３７によれ
ば、従来構成の冷凍サイクル１（図４参照）と同様にし
て、冷蔵室用蒸発器５の設定温度と冷凍室用蒸発器９の
設定温度をそれぞれかなり自由に設定できると共に、各
蒸発器５、９を連続して冷却できる。このため、冷凍サ
イクル３７の効率を高めることができ、また、冷蔵室用
蒸発器５の設定温度を高く（例えば−１〜０℃程度に）
設定することが可能になることから、冷蔵室用蒸発器５
への着霜量を減らすことができ、冷蔵室２３及び野菜室
２４内の湿度を高く保つことができる。According to the refrigerating cycle 37 having the above-described structure, the set temperatures of the refrigerator compartment evaporator 5 and the freezer compartment evaporator 9 are set in the same manner as the conventional refrigerating cycle 1 (see FIG. 4). Each can be set quite freely and each evaporator 5, 9 can be cooled continuously. Therefore, the efficiency of the refrigeration cycle 37 can be increased, and the set temperature of the refrigerator compartment evaporator 5 is increased (for example, to about -1 to 0 ° C).
Because it becomes possible to set, the refrigerator 5 evaporator 5
It is possible to reduce the amount of frost formed on the refrigerator compartment and keep the humidity in the refrigerator compartment 23 and the vegetable compartment 24 high.
【００２６】さて、上記冷凍サイクル３７において、冷
凍室２５、２６だけに過大な負荷がかかった場合、冷凍
室用蒸発器９内を冷媒が流れ難くなって冷凍能力が不足
するので、２段圧縮コンプレッサ２の回転数を上げる制
御を行って対応する。そして、このように対応すると、
冷蔵室２３内で冷却能力が過剰となり、冷蔵室用蒸発器
５から出る冷媒の中に占める液冷媒の割合が多くなり、
気液分離器６で相分離しきれなかった液冷媒がＲサクシ
ョンパイプ７を流れるようになる。In the refrigeration cycle 37, if an excessive load is applied only to the freezer compartments 25 and 26, it becomes difficult for the refrigerant to flow in the evaporator 9 for the freezer compartment and the refrigerating capacity becomes insufficient. The control is performed by increasing the rotation speed of the compressor 2. And if you respond like this,
The cooling capacity becomes excessive in the refrigerating compartment 23, and the proportion of the liquid refrigerant in the refrigerant discharged from the refrigerating compartment evaporator 5 increases,
The liquid refrigerant that has not been phase-separated in the gas-liquid separator 6 comes to flow through the R suction pipe 7.
【００２７】即ち、Ｒサクションパイプ７内を２相冷媒
が流れるようになる。このため、２段圧縮コンプレッサ
２の中間圧側吸込口２ｂへの液戻りや、Ｒサクションパ
イプ７に結露が発生するおそれがある。That is, the two-phase refrigerant flows in the R suction pipe 7. Therefore, liquid return to the intermediate pressure side suction port 2b of the two-stage compression compressor 2 or dew condensation on the R suction pipe 7 may occur.
【００２８】これに対して、上記実施例においては、冷
蔵室用蒸発器５から出た冷媒と、冷凍室用蒸発器９から
出た冷媒を熱交換させるように構成（具体的には、Ｒサ
クションパイプ７とＦサクションパイプ１０を所定長さ
だけ隣接させて並べてこれらを半田付けにより接合する
ように構成）したので、冷蔵室用蒸発器９で冷媒が蒸発
しきれなくなったとしても、Ｒサクションパイプ７を流
れる２相冷媒でＦサクションパイプ１０内のガス冷媒を
冷却することができると共に、Ｒサクションパイプ７を
流れる液冷媒を蒸発させることができる。これにより、
２段圧縮コンプレッサ２の低圧側吸込口２ｃの冷媒密度
を大きくすることができる。On the other hand, in the above embodiment, the refrigerant discharged from the refrigerator compartment evaporator 5 and the refrigerant discharged from the freezer compartment evaporator 9 are heat-exchanged (specifically, R Since the suction pipe 7 and the F suction pipe 10 are arranged adjacent to each other by a predetermined length and are joined by soldering, even if the refrigerant cannot be completely evaporated in the refrigerator compartment evaporator 9, the R suction The gas refrigerant in the F suction pipe 10 can be cooled by the two-phase refrigerant flowing in the pipe 7, and the liquid refrigerant flowing in the R suction pipe 7 can be evaporated. This allows
The refrigerant density of the low pressure side suction port 2c of the two-stage compression compressor 2 can be increased.
【００２９】この結果、冷凍室用蒸発器９の冷媒流量を
増加させることができ、冷凍室２５、２６の冷却能力を
大きくすることができる。従って、上記実施例によれ
ば、２段圧縮コンプレッサ２の中間圧側吸込口２ｂへの
液戻りや，Ｒサクションパイプ７の結露を防止すること
ができる。As a result, the refrigerant flow rate of the freezer compartment evaporator 9 can be increased and the cooling capacity of the freezer compartments 25 and 26 can be increased. Therefore, according to the above-described embodiment, it is possible to prevent liquid return to the intermediate pressure side suction port 2b of the two-stage compression compressor 2 and dew condensation of the R suction pipe 7.
【００３０】図３は、本発明の第２の実施例を示す冷凍
サイクルの構成図である。尚、従来構成（図５参照）及
び第１の実施例（図１参照）と同一構成には、同一符号
を付している。FIG. 3 is a block diagram of a refrigeration cycle showing a second embodiment of the present invention. The same components as those of the conventional configuration (see FIG. 5) and the first embodiment (see FIG. 1) are designated by the same reference numerals.
【００３１】上記第２の実施例の冷凍サイクル３８にお
いては、図３に示すように、２段圧縮コンプレッサ２の
高圧側吐出口２ａを凝縮器３に接続し、この凝縮器３の
出口を分流器（第２の分流器）１２に接続している。そ
して、この分流器１２の一方の出口を第１の絞り装置４
に接続し、この第１の絞り装置４の出口を冷蔵室用蒸発
器５に接続し、この冷蔵室用蒸発器５の出口をＲサクシ
ョンパイプ７を経て２段圧縮コンプレッサ２の中間圧側
吸込口２ｂに接続している。In the refrigeration cycle 38 of the second embodiment, as shown in FIG. 3, the high pressure side discharge port 2a of the two-stage compression compressor 2 is connected to the condenser 3, and the outlet of this condenser 3 is diverted. It is connected to the container (second shunt) 12. Then, one outlet of this flow divider 12 is connected to the first expansion device 4
The outlet of the first expansion device 4 is connected to the refrigerator compartment evaporator 5, and the outlet of the refrigerator compartment evaporator 5 is connected to the intermediate pressure side suction port of the two-stage compression compressor 2 via the R suction pipe 7. It is connected to 2b.
【００３２】また、分流器１２の他方の出口を第２の絞
り装置８に接続し、この第２の絞り装置８の出口を冷凍
室用蒸発器９に接続し、この冷凍室用冷却器９の出口を
Ｆサクションパイプ１０を経て２段圧縮コンプレッサ２
の低圧側吸込口２ｃに接続している。The other outlet of the flow divider 12 is connected to the second expansion device 8, the outlet of the second expansion device 8 is connected to the evaporator 9 for the freezing compartment, and the cooler 9 for the freezing compartment is connected. At the outlet of the two-stage compression compressor 2 through the F suction pipe 10
Is connected to the low pressure side suction port 2c.
【００３３】更に、第２の実施例においても、第１の実
施例と同様にして、Ｒサクションパイプ７とＦサクショ
ンパイプ１０を所定長さだけ隣接させて並べてこれらを
半田付けにより接合している。即ち、Ｒサクションパイ
プ７内の冷媒とＦサクションパイプ１０内の冷媒とを熱
交換させるように構成している。Further, also in the second embodiment, similar to the first embodiment, the R suction pipe 7 and the F suction pipe 10 are arranged adjacent to each other by a predetermined length and are joined by soldering. . That is, the refrigerant in the R suction pipe 7 and the refrigerant in the F suction pipe 10 are heat-exchanged.
【００３４】上述した以外の第２の実施例の構成は、第
１の実施例の構成と同じ構成となっている。従って、第
２の実施例においても、第１の実施例とほぼ同じ作用効
果を得ることができる。The structure of the second embodiment other than the above is the same as the structure of the first embodiment. Therefore, also in the second embodiment, it is possible to obtain substantially the same operational effects as in the first embodiment.
【００３５】尚、上記各実施例においては、冷媒として
例えばＲ１３４ａのようなフロン系冷媒を使用している
が、これに代えて、Ｒ６００ａのような炭化水素系冷媒
を使用しても良い。In each of the above embodiments, a CFC-based refrigerant such as R134a is used as the refrigerant, but a hydrocarbon-based refrigerant such as R600a may be used instead.
【００３６】[0036]
【発明の効果】本発明は、以上の説明から明らかなよう
に、２段圧縮コンプレッサを有する冷凍サイクルが組み
込まれた冷蔵庫において、冷蔵室用蒸発器から出た冷媒
と、冷凍室用蒸発器から出た冷媒を熱交換させるように
構成したので、冷凍室に過大な負荷がかかった場合に、
２段圧縮コンプレッサの中間圧側吸込口への液戻りや冷
蔵室用サクションパイプの結露を防止することができる
という優れた効果を奏する。As is apparent from the above description, the present invention relates to a refrigerator in which a refrigerating cycle having a two-stage compression compressor is incorporated, and a refrigerant discharged from a refrigerating compartment evaporator and a refrigerating compartment evaporator. Since it is configured to exchange heat with the refrigerant that comes out, if an excessive load is applied to the freezer,
It has an excellent effect that it is possible to prevent liquid return to the suction port on the intermediate pressure side of the two-stage compression compressor and dew condensation on the suction pipe for the refrigerating room.
【図１】本発明の第１の実施例を示す冷凍サイクルの構
成図FIG. 1 is a configuration diagram of a refrigeration cycle showing a first embodiment of the present invention.
【図２】冷蔵庫の概略縦断側面図FIG. 2 is a schematic vertical sectional side view of a refrigerator.
【図３】本発明の第２の実施例を示す図１相当図FIG. 3 is a diagram corresponding to FIG. 1 showing a second embodiment of the present invention.
【図４】従来構成を示す図１相当図FIG. 4 is a diagram corresponding to FIG. 1 showing a conventional configuration.
【図５】他の従来構成を示す図１相当図FIG. 5 is a view corresponding to FIG. 1 showing another conventional configuration.
１は冷凍サイクル、２は２段圧縮コンプレッサ、２ａは
高圧側吐出口、２ｂは中間圧側吸込口、２ｃは低圧側吸
込口、３は凝縮器、５は冷蔵室用蒸発器、６は気液分離
器（第１の分流器）、７はＲサクションパイプ（冷蔵室
側サクションパイプ）、９は冷凍室用蒸発器、１０はＦ
サクションパイプ（冷凍室側サクションパイプ）、１１
は冷凍サイクル、１２は分流器、２１は本体、２３は冷
蔵室、２４は野菜室、２５、２６は冷凍室、３２は冷蔵
室用循環ファン、３５は冷凍室用循環ファン、３７は冷
凍サイクル、３８は冷凍サイクルを示す。1 is a refrigeration cycle, 2 is a two-stage compression compressor, 2a is a high-pressure side discharge port, 2b is an intermediate-pressure side suction port, 2c is a low-pressure side suction port, 3 is a condenser, 5 is a refrigerator evaporator, and 6 is gas-liquid. Separator (first flow divider), 7 R suction pipe (refrigerator side suction pipe), 9 freezer evaporator, 10 F
Suction pipe (suction pipe on the freezer side), 11
Is a refrigeration cycle, 12 is a flow divider, 21 is a main body, 23 is a refrigerating compartment, 24 is a vegetable compartment, 25 and 26 are freezing compartments, 32 is a refrigerating compartment circulation fan, 35 is a freezing compartment circulation fan, and 37 is a refrigeration cycle. , 38 indicates a refrigeration cycle.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鹿島 弘次 大阪府茨木市太田東芝町１番６号 株式会 社東芝大阪工場内 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Koji Kashima No. 6 Ota-Toshiba-cho, Ibaraki City, Osaka Prefecture Stock Association Company Toshiba Osaka factory
Claims (5)
る２段圧縮コンプレッサと、凝縮器と、冷蔵室用蒸発器
と、冷凍室用蒸発器とから構成された冷凍サイクルを備
えてなる冷蔵庫において、 前記冷蔵室用蒸発器から出た冷媒と、前記冷凍室用蒸発
器から出た冷媒を熱交換させるように構成したことを特
徴とする冷蔵庫。1. A refrigeration cycle including a two-stage compression compressor having a low-pressure side suction port and an intermediate-pressure side suction port, a condenser, a refrigerator compartment evaporator, and a freezer compartment evaporator. In the refrigerator, the refrigerant discharged from the refrigerator evaporator and the refrigerant discharged from the freezer evaporator are heat-exchanged.
プレッサの吐出口を前記凝縮器に接続し、前記凝縮器の
出口を第１の絞り装置に接続し、前記第１の絞り装置の
出口を前記冷蔵室用蒸発器に接続し、前記冷蔵室用蒸発
器の出口を第１の分流器に接続し、前記第１の分流器の
一方の出口を冷蔵室側サクションパイプを経て前記２段
圧縮コンプレッサの中間圧側吸込口に接続し、前記第１
の分流器の他方の出口を第２の絞り装置に接続し、前記
第２の絞り装置の出口を前記冷凍室用蒸発器に接続し、
前記冷凍室用蒸発器の出口を冷凍室側サクションパイプ
を経て前記２段圧縮コンプレッサの低圧側吸込口に接続
するように構成し、 前記冷蔵室側サクションパイプと前記冷凍室側サクショ
ンパイプを熱交換させるように構成したことを特徴とす
る請求項１記載の冷蔵庫。2. In the refrigeration cycle, the outlet of the two-stage compression compressor is connected to the condenser, the outlet of the condenser is connected to a first expansion device, and the outlet of the first expansion device is connected. It is connected to the refrigerating compartment evaporator, an outlet of the refrigerating compartment evaporator is connected to a first flow divider, and one outlet of the first flow divider is passed through the refrigerating compartment side suction pipe to the two-stage compression. Connected to the intermediate pressure side suction port of the compressor,
The other outlet of the shunt is connected to the second expansion device, and the outlet of the second expansion device is connected to the freezer evaporator.
The evaporator of the freezer compartment is connected to the low pressure side suction port of the two-stage compression compressor via the freezer compartment suction pipe, and the refrigerating compartment side suction pipe and the freezer compartment side suction pipe are heat-exchanged. The refrigerator according to claim 1, wherein the refrigerator is configured to operate.
されていることを特徴とする請求項２記載の冷蔵庫。3. The refrigerator according to claim 2, wherein the first flow divider comprises a gas-liquid separator.
プレッサの吐出口を前記凝縮器に接続し、前記凝縮器の
出口を第２の分流器に接続し、前記第２の分流器の一方
の出口を第１の絞り装置に接続し、前記第１の絞り装置
の出口を前記冷蔵室用蒸発器に接続し、前記冷蔵室用蒸
発器の出口を冷蔵室側サクションパイプを経て前記２段
圧縮コンプレッサの中間圧側吸込口に接続し、前記第２
の分流器の他方の出口を第２の絞り装置に接続し、前記
第２の絞り装置の出口を前記冷凍室用蒸発器に接続し、
前記冷凍室用蒸発器の出口を冷凍室側サクションパイプ
を経て前記２段圧縮コンプレッサの低圧側吸込口に接続
するように構成し、 前記冷蔵室側サクションパイプと前記冷凍室側サクショ
ンパイプを熱交換させるように構成したことを特徴とす
る請求項１記載の冷蔵庫。4. In the refrigeration cycle, the outlet of the two-stage compression compressor is connected to the condenser, the outlet of the condenser is connected to a second flow divider, and one of the second flow dividers is connected. An outlet is connected to a first expansion device, an outlet of the first expansion device is connected to the refrigerating compartment evaporator, and an outlet of the refrigerating compartment evaporator is passed through the refrigerating compartment side suction pipe to the two-stage compression. Connected to the suction port on the intermediate pressure side of the compressor,
The other outlet of the shunt is connected to the second expansion device, and the outlet of the second expansion device is connected to the freezer evaporator.
The evaporator of the freezer compartment is connected to the low pressure side suction port of the two-stage compression compressor via the freezer compartment side suction pipe, and the refrigeration room side suction pipe and the freezer compartment side suction pipe are heat-exchanged. The refrigerator according to claim 1, wherein the refrigerator is configured to operate.
ことを特徴とする請求項１ないし４のいずれかに記載の
冷蔵庫。5. The refrigerator according to claim 1, wherein a hydrocarbon refrigerant is used as the refrigerant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001294206A JP2003106693A (en) | 2001-09-26 | 2001-09-26 | Refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001294206A JP2003106693A (en) | 2001-09-26 | 2001-09-26 | Refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003106693A true JP2003106693A (en) | 2003-04-09 |
Family
ID=19115852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001294206A Pending JP2003106693A (en) | 2001-09-26 | 2001-09-26 | Refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003106693A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005052468A1 (en) * | 2003-11-28 | 2005-06-09 | Kabushiki Kaisha Toshiba | Refrigerator |
| EP1684027A2 (en) | 2004-12-28 | 2006-07-26 | Sanyo Electric Co., Ltd. | Refrigerating apparatus and refrigerator |
| EP1707899A2 (en) | 2005-03-30 | 2006-10-04 | Sanyo Electric Co., Ltd. | Refrigerating device and refrigerator |
| US7293428B2 (en) | 2004-03-15 | 2007-11-13 | Sanyo Electric Co., Ltd. | Refrigerating machine |
| KR100858431B1 (en) * | 2007-06-22 | 2008-09-16 | 주식회사 대우일렉트로닉스 | Refrigerating system and control method of refrigerator |
| USRE43805E1 (en) | 2004-10-18 | 2012-11-20 | Mitsubishi Electric Corporation | Refrigeration/air conditioning equipment |
| US8899058B2 (en) * | 2006-03-27 | 2014-12-02 | Mitsubishi Electric Corporation | Air conditioner heat pump with injection circuit and automatic control thereof |
| KR20160091107A (en) * | 2015-01-23 | 2016-08-02 | 엘지전자 주식회사 | Cooling Cycle Apparatus for Refrigerator |
-
2001
- 2001-09-26 JP JP2001294206A patent/JP2003106693A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1707900A4 (en) * | 2003-11-28 | 2008-10-29 | Toshiba Kk | Refrigerator |
| CN100439816C (en) * | 2003-11-28 | 2008-12-03 | 株式会社东芝 | Refrigerator |
| US7770406B2 (en) | 2003-11-28 | 2010-08-10 | Kabushiki Kaisha Toshiba | Refrigerator |
| KR100756725B1 (en) * | 2003-11-28 | 2007-09-07 | 가부시끼가이샤 도시바 | Refrigerator |
| WO2005052468A1 (en) * | 2003-11-28 | 2005-06-09 | Kabushiki Kaisha Toshiba | Refrigerator |
| EP1707900A1 (en) * | 2003-11-28 | 2006-10-04 | Kabushiki Kaisha Toshiba | Refrigerator |
| US7293428B2 (en) | 2004-03-15 | 2007-11-13 | Sanyo Electric Co., Ltd. | Refrigerating machine |
| USRE43805E1 (en) | 2004-10-18 | 2012-11-20 | Mitsubishi Electric Corporation | Refrigeration/air conditioning equipment |
| USRE43998E1 (en) | 2004-10-18 | 2013-02-19 | Mitsubishi Electric Corporation | Refrigeration/air conditioning equipment |
| US7331196B2 (en) | 2004-12-28 | 2008-02-19 | Sanyo Electric Co., Ltd. | Refrigerating apparatus and refrigerator |
| EP1684027A2 (en) | 2004-12-28 | 2006-07-26 | Sanyo Electric Co., Ltd. | Refrigerating apparatus and refrigerator |
| EP1707899A2 (en) | 2005-03-30 | 2006-10-04 | Sanyo Electric Co., Ltd. | Refrigerating device and refrigerator |
| US8899058B2 (en) * | 2006-03-27 | 2014-12-02 | Mitsubishi Electric Corporation | Air conditioner heat pump with injection circuit and automatic control thereof |
| KR100858431B1 (en) * | 2007-06-22 | 2008-09-16 | 주식회사 대우일렉트로닉스 | Refrigerating system and control method of refrigerator |
| KR102262722B1 (en) | 2015-01-23 | 2021-06-09 | 엘지전자 주식회사 | Cooling Cycle Apparatus for Refrigerator |
| KR20160091107A (en) * | 2015-01-23 | 2016-08-02 | 엘지전자 주식회사 | Cooling Cycle Apparatus for Refrigerator |
| US20160356537A1 (en) * | 2015-01-23 | 2016-12-08 | Lg Electronics Inc. | Cooling cycle apparatus for refrigerator |
| US10215469B2 (en) * | 2015-01-23 | 2019-02-26 | Lg Electronics Inc. | Cooling cycle apparatus for refrigerator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2833083B1 (en) | Refrigeration device | |
| KR101638675B1 (en) | Combined binary refrigeration cycle apparatus | |
| US10041716B2 (en) | Refrigerator | |
| JP2006183950A (en) | Refrigeration apparatus and refrigerator | |
| KR100381634B1 (en) | Refrigerator | |
| JPH05223368A (en) | Refrigerator | |
| JP2011214753A (en) | Refrigerating device | |
| US20060168997A1 (en) | Refrigerating device and refrigerator | |
| JP4651452B2 (en) | Refrigeration air conditioner | |
| JP2003106693A (en) | Refrigerator | |
| JP3847499B2 (en) | Two-stage compression refrigeration system | |
| JP3998035B2 (en) | Refrigeration equipment | |
| JP2000234813A (en) | Refrigerating device | |
| JP2003207220A (en) | Cooling device | |
| KR102174385B1 (en) | A refrigerator and a control method the same | |
| JP2017146080A (en) | refrigerator | |
| KR102494567B1 (en) | A refrigerator and a control method the same | |
| JP2004028370A (en) | Refrigerator-freezer | |
| JP3725397B2 (en) | refrigerator | |
| WO2006028147A1 (en) | Freezing apparatus | |
| JP2015178921A (en) | Refrigeration device | |
| KR102295156B1 (en) | A refrigerator | |
| JP2001201194A (en) | Cold storage system with deep freezer | |
| JP2006207982A (en) | Refrigerating apparatus and refrigerator | |
| JP2009156491A (en) | Refrigerating device |