JP3710353B2 - refrigerator - Google Patents

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Publication number
JP3710353B2
JP3710353B2 JP2000092729A JP2000092729A JP3710353B2 JP 3710353 B2 JP3710353 B2 JP 3710353B2 JP 2000092729 A JP2000092729 A JP 2000092729A JP 2000092729 A JP2000092729 A JP 2000092729A JP 3710353 B2 JP3710353 B2 JP 3710353B2
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Japan
Prior art keywords
room
refrigerating
evaporator
refrigerator
freezing
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JP2000092729A
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Japanese (ja)
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JP2001280786A (en
Inventor
茂樹 中野
宏 吉村
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Sharp Corp
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Sharp Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/068—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans
    • F25D2317/0682—Two or more fans

Abstract

PROBLEM TO BE SOLVED: To solve a problem that freshness of articles stored in a refrigerating compartment deteriorates when a large quantity of articles are placed simultaneously in the refrigerating compartment and a freezing compartment and inner temperature of both compartments rise, and a problem that energy consumption increases because each compartment is cooled individually. SOLUTION: At the time of freeze cycle operation, refrigerant flows simultaneously through an evaporator 7 for refrigerating compartment and an evaporator 4 for freezing compartment or flows only through the evaporator 4 for freezing compartment.

Description

【０００１】
【発明の属する技術分野】
本発明は複数個の蒸発器をもつ冷凍サイクルを備えた冷蔵庫に関するものである。
【０００２】
【従来の技術】
従来この種の冷蔵庫は、例えば特開平１０−４７８２７号公報に示されるように、冷蔵室と冷凍室をもち、前記各々の部屋には室温感知のための冷蔵室温度感知装置と冷凍室温度感知装置を設け、圧縮機と、前記圧縮機に並列に接続された複数個の蒸発器と、前記各々の蒸発器に対応して設けられた絞り装置と、凝縮器と、冷媒流路とを備えて冷凍サイクルを構成し、前記蒸発器には冷蔵室用蒸発器と冷凍室用蒸発器とがあり、前記蒸発器の各々を冷却するための冷蔵室用ファンと冷凍室用ファンをもち、前記凝縮器の少なくとも一部を冷却する凝縮器用ファンを設け、前記冷凍サイクルの冷蔵室用蒸発器につながる絞り装置と前記凝縮器との間に開閉弁を設け、前記冷蔵室用ファンと冷凍室用ファンを交互に運転させ、前記冷蔵室用ファンの運転に同期して前記開閉弁を開閉させ、前記冷蔵室の冷却運転時は前記冷凍室の冷却運転時に比較して冷凍能力を減少させるものがある。
【０００３】
【発明が解決しようとする課題】
前記のような冷蔵庫では、冷蔵室と冷凍室が同時に設定温度以上になったとき、例えば、新たに貯蔵品を冷蔵室と冷凍室に同時に多量に入れて双方の室温があがったとき、優先されていない前記貯蔵室、例えば、冷蔵室に貯蔵されている貯蔵品の鮮度が低下するという課題や、各室が個別で冷却される為エネルギー消費量が高くなるという課題があった。
【０００４】
【課題を解決するための手段】
本発明の冷蔵庫は上記のような課題を解決したもので、本発明の冷蔵庫は、少なくとも冷蔵室と冷凍室をもち、前記冷蔵室の室温を感知する冷蔵室温度感知装置と、前記冷凍室の室温を感知する冷凍室温度感知装置と、冷媒の流通により冷凍サイクルを運転する能力可変の圧縮機と、前記圧縮機に並列に接続された冷蔵室用蒸発器及び冷凍室用蒸発器と、前記冷蔵室用蒸発器及び前記冷凍室用蒸発器にそれぞれ対応して設けられた冷蔵室用絞り装置及び冷凍室用絞り装置と、前記冷蔵室用絞り装置及び前記冷凍室用絞り装置と前記圧縮機との間に配される凝縮器と、前記冷蔵室用絞り装置と前記凝縮器との間に配される開閉弁と、前記凝縮器を冷却する凝縮器用ファンとを備え、冷凍サイクル運転時には前記開閉弁の開閉によって、前記冷蔵室用蒸発器及び前記冷凍室用蒸発器に同時に冷媒が流れるか、前記冷凍室用蒸発器のみに冷媒が流れるかのいずれかであり、前記冷蔵室の室温が所定の設定温度以上で前記冷凍室の室温が所定の設定温度以下のときに、前記冷蔵室用蒸発器及び前記冷凍室用蒸発器に同時に冷媒を流して前記凝縮器用ファンの回転数及び前記圧縮機の冷凍能力を低下させることを特徴とするものである。
【０００５】
また本発明は、上記構成の冷蔵庫において、前記冷蔵室に冷気を送出する冷蔵室用ファンと前記冷凍室に冷気を送出する冷凍室用ファンとを備え、前記冷蔵室の室温が所定の設定温度以上で前記冷凍室の室温が所定の設定温度以下のときに、前記冷凍室用ファンの回転数を低下させることを特徴とするものである。
【０００６】
また本発明は、少なくとも冷蔵室と冷凍室をもち、前記冷蔵室の室温を感知する冷蔵室温度感知装置と、前記冷凍室の室温を感知する冷凍室温度感知装置と、冷媒の流通により冷凍サイクルを運転する能力可変の圧縮機と、前記圧縮機に並列に接続された冷蔵室用蒸発器及び冷凍室用蒸発器と、前記冷蔵室用蒸発器及び前記冷凍室用蒸発器にそれぞれ対応して設けられた冷蔵室用絞り装置及び冷凍室用絞り装置と、前記冷蔵室用絞り装置及び前記冷凍室用絞り装置と前記圧縮機との間に配される凝縮器と、前記冷蔵室用絞り装置と前記凝縮器との間に配される開閉弁とを備え、冷凍サイクル運転時には前記開閉弁の開閉によって、前記冷蔵室用蒸発器及び前記冷凍室用蒸発器に同時に冷媒が流れるか、前記冷凍室用蒸発器のみに冷媒が流れるかのいずれかであり、前記冷蔵室の室温が所定の設定温度以上で前記冷凍室の室温が所定の設定温度以下のときに、前記冷蔵室用蒸発器及び前記冷凍室用蒸発器に同時に冷媒を流し、前記冷凍室温度感知装置の感知によって前記圧縮機の冷凍能力を切り替える切替温度を高く設定したことを特徴とするものである。
【０００７】
また本発明は、上記構成の冷蔵庫において、前記冷凍室の室温が前記切替温度よりも低い場合に高い場合よりも前記圧縮機の冷凍能力を低下させることを特徴とするものである。
【０００８】
また本発明は、上記構成の冷蔵庫において、前記凝縮器を冷却する凝縮器用ファンを備え、前記冷凍室の室温が前記切替温度よりも低い場合に高い場合よりも前記凝縮器用ファンの回転数を低下させることを特徴とするものである。
【０００９】
また本発明は、上記構成の冷蔵庫において、前記冷蔵室に冷気を送出する冷蔵室用ファンと前記冷凍室に冷気を送出する冷凍室用ファンとを備え、前記冷凍室の室温が前記切替温度よりも低い場合に高い場合よりも前記冷凍室用ファンの回転数を低下させることを特徴とするものである。
【００１０】
また本発明は、上記構成の冷蔵庫において、前記冷蔵室の室温及び前記冷凍室の室温に応じて前記冷蔵室用絞り装置及び前記冷凍室用絞り装置の絞り量を可変したことを特徴とするものである。
【００１１】
【発明の実施の形態】
以下、本発明の冷蔵庫の実施の形態を図面とともに説明する。
【００１２】
図１は本発明の冷蔵庫のブロック図であり、図１において、１は圧縮機、２は凝縮器、３は冷凍室用蒸発器４につながる冷凍室用絞り装置、５は開閉弁、６は冷蔵室用蒸発器７につながる冷蔵室用絞り装置、８は前記凝縮器２の少なくとも一部を冷却するための凝縮器用ファン、９は前記冷凍室用蒸発器４で冷却された冷気を冷凍室１０に送り出すための冷凍室用ファン、１１は前記冷蔵室用蒸発器７で冷却された冷気を冷蔵室１２に送り出すための冷蔵室用ファン、１３は冷凍室温度感知装置、１４は冷蔵室温度感知装置である。
【００１３】
なお、冷凍室用絞り装置３と冷凍室用蒸発器４、開閉弁５と冷蔵室用絞り装置６と冷蔵室用蒸発器７は並列に接続されており、圧縮機１、凝縮器２、冷凍室用絞り装置３、冷凍室用蒸発器４、開閉弁５、冷蔵室用絞り装置６、冷蔵室用蒸発器７は冷凍サイクルを形成している。
【００１４】
そして、冷凍室１０と冷蔵室１２がともに設定温度（例えば、設定温度が冷凍室１０は−１８℃、冷蔵室１２は５℃）より高いとき、冷凍室温度感知装置１３や冷蔵室温度感知装置１４が室温を感知し、制御装置（不図示）にて圧縮機１が運転され、凝縮器２で液化された冷媒が、冷凍室用絞り装置３を通り冷凍室用蒸発器４で蒸発しながら周囲の空気から熱を奪って流れ、また、凝縮器２で液化された冷媒が、開かれた開閉弁５を通り冷蔵室用絞り装置６を通り冷蔵室用蒸発器７で蒸発しながら周囲の空気から熱を奪って流れ、気化状態で圧縮機１に戻り、一連の冷凍サイクルとなる。
【００１５】
また、このとき、凝縮器用ファン８や冷凍室用ファン９や冷蔵室用ファン１１も同期して運転され、凝縮器用ファン８は凝縮器２を冷却し冷媒の液化を助け、冷凍室用ファン９や冷蔵室用ファン１１は各々冷凍室１０や冷蔵室１２に冷凍室用蒸発器４や冷蔵室用蒸発器７で冷却された冷気を送り、冷凍室１０や冷蔵室１２を所定の室温にまで冷却することになる。そのため、冷凍室１０や冷蔵室１２に同時に貯蔵品をたくさん新に貯蔵しても、即座に冷却され、貯蔵品の劣化を防止できる。
【００１６】
なお、冷蔵室１２が所定の室温（例えば、３℃）になると、開閉弁５が閉じられ、冷蔵室用蒸発器７に冷媒が流れ込まなくなる。そして、所定の時間が経過した後、冷蔵室用ファン１１は停止される。
【００１７】
また、この時冷凍室１０が所定の温度（例えば、−１８℃）になっていないと、圧縮機１や凝縮器用ファン８や冷凍室用ファン９の運転は継続され、圧縮機１の冷凍能力は制御装置（不図示）にて所定値まで下げられ、同時に凝縮器用ファン８もその能力に応じた回転数に下げられる。そのため、効率よく圧縮機１や凝縮器用ファン８が運転されエネルギーの省力化につながる。
【００１８】
なお、前記で冷蔵室用ファン１１の運転が所定の回転数に下げられ、運転が継続されるようにしておくと、冷蔵室１２内の冷気撹拌に役立ち、さらには、冷蔵室用蒸発器７が霜付き状態になっている場合、冷蔵室１２内の冷気により前記冷蔵室用蒸発器７の除霜に役立ち、また、前記除霜により冷蔵室１２内の加湿にも役立つ。
【００１９】
また、冷蔵室１２が設定された所定の室温（例えば、５℃）より高くなり、そのとき、冷凍室１０は設定された所定の室温（例えば、−１８℃）以下のときは、冷凍室温度感知装置１３や冷蔵室温度感知装置１４が各々の室温を感知し、その感知温度に基づき、制御装置（不図示）にて圧縮機１の冷凍能力を必要能力に応じて、冷凍室１０と冷蔵室１２とがともに設定温度（例えば、設定温度が冷凍室１０は−１８℃、冷蔵室１２は５℃）より高く冷凍室１０と冷蔵室１２を同時に冷却するときよりは低い能力で運転され、凝縮器用ファン８や冷凍室用ファン９の回転数もそれに応じて制御装置（不図示）にて下げられて運転されるため、効率よく圧縮機１や凝縮器用ファン８や冷凍室用ファン９が運転されエネルギーの省力化につながる。
【００２０】
そして、このとき、前記冷凍室１０が必要以上の過冷却状態（例えば、−２１℃以下の温度）になることを防ぐため、冷凍室温度感知装置１３による冷凍室向けの切替温度を高くなる（例えば、切替温度は−２１℃から−１９℃にあげる。）ように、制御装置（不図示）の設定が、前記各々の室温に基づき、変わるようにしておき、冷凍室温度感知装置１３や冷蔵室温度感知装置１４の感知状態に基づき、制御装置（不図示）にて圧縮機１の冷凍能力を必要能力に応じて、前記のような冷凍室１０と冷蔵室１２を同時に冷却するときよりは切り替えられて低い能力で運転され、凝縮器用ファン８や冷凍室用ファン９の回転数もそれに応じて制御装置（不図示）にて切り替えられて下げられ運転されるようにしておく。
【００２１】
前記により、前記冷凍室１０が必要以上に冷却（過冷却）されずに、適度に外部からの熱の侵入に対して冷却状態が維持でき、また、圧縮機１のＯＮ−ＯＦＦの回数も増えず、そのため、圧縮機１の起動時に多量に必要とする消費電力の増加もなく、消費電力が少なく効率よく冷蔵室１２や冷凍室１０を冷却することができ、さらに効率よく圧縮機１や凝縮器用ファン８や冷凍室用ファン９が運転され、いっそうエネルギーの省力化につながる。
【００２２】
なお、このとき圧縮機の冷凍能力を変える手段として圧縮機電動機の回転数を減らしそれに連動して動くピストンの冷媒圧縮回数減により冷凍サイクル内の冷媒循環量を減らす方法や冷凍室用絞り装置３及び冷蔵室用絞り装置６を可変型絞り弁や開閉弁と数種類の状態に合わせたキャピラリーチューブとの組み合わせの切替式絞り装置を少なくとも一部に含む絞り装置にして、それらの状態に合った冷媒流や圧力差とする絞り状態（例えば、圧縮機１の低下能力に応じて、冷凍室用絞り装置３や冷蔵室用絞り装置６を絞る。）にしてもよい。
【００２３】
【発明の効果】
本発明の冷蔵庫は前記のような構成であるから、本発明によれば、冷蔵室も冷凍室もその負荷変動に応じて最適の冷却効果が得られ、エネルギーロスの少ない高効率の冷凍サイクルをもった冷蔵庫が得られる。
【図面の簡単な説明】
【図１】本発明の冷蔵庫のブロック図である。
【符号の説明】
１ 圧縮機
２ 凝縮器
３ 冷凍室用絞り装置
４ 冷凍室用蒸発器
５ 開閉弁
６ 冷蔵室用絞り装置
７ 冷蔵室用蒸発器
８ 凝縮器用ファン
９ 冷凍室用ファン
１０ 冷凍室
１１ 冷蔵室用ファン
１２ 冷蔵室
１３ 冷凍室温度感知装置
１４ 冷蔵室温度感知装置[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerator having a refrigeration cycle having a plurality of evaporators.
[0002]
[Prior art]
Conventionally, this type of refrigerator has a refrigerator compartment and a freezer compartment as disclosed in, for example, Japanese Patent Laid-Open No. 10-47827, and each of the rooms has a refrigerator compartment temperature sensing device and a freezer compartment temperature detector. A compressor, a plurality of evaporators connected in parallel to the compressor, a throttling device provided corresponding to each of the evaporators, a condenser, and a refrigerant flow path A refrigerating cycle, and the evaporator includes a refrigerating room evaporator and a refrigerating room evaporator, each having a refrigerating room fan and a freezing room fan for cooling each of the evaporators, A condenser fan for cooling at least a part of the condenser is provided, and an open / close valve is provided between the condenser and the expansion device connected to the refrigerator for the refrigerator compartment of the refrigeration cycle, and the refrigerator fan and the refrigerator compartment The fans for the refrigerator compartment are operated alternately. In synchronization with the operation to open and close the closing valve, during the cooling operation of the refrigerating chamber there is to reduce the cooling capacity as compared to during the cooling operation of the freezing chamber.
[0003]
[Problems to be solved by the invention]
In the refrigerator as described above, when the refrigerator compartment and the freezer compartment simultaneously reach the set temperature or higher, for example, when a large amount of storage items are newly placed in the refrigerator compartment and the freezer compartment at the same time and both room temperatures are increased, priority is given. There has been a problem that the freshness of stored items stored in the storage room, for example, a refrigerator room, which has not been reduced, and a problem that energy consumption is increased because each room is individually cooled.
[0004]
[Means for Solving the Problems]
The refrigerator of the present invention has solved the above-mentioned problems, and the refrigerator of the present invention has at least a refrigerator compartment and a freezer compartment, and a refrigerator temperature sensor for sensing the room temperature of the refrigerator compartment, a freezing compartment temperature sensing device for sensing a room temperature, and capacity variable compressor operating the refrigeration cycle by circulation of refrigerant, and the connected in parallel with the compressor the refrigerator compartment evaporator and the freezer compartment evaporator, the wherein the diaphragm refrigerating chamber means and the diaphragm freezing chamber device provided with respectively correspond to the refrigerator compartment evaporator and an evaporator for the freezing chamber, and the diaphragm refrigerating chamber means and said diaphragm freezing chamber device compression A condenser disposed between the compressor, an on-off valve disposed between the refrigerator for the refrigerating chamber and the condenser, and a condenser fan for cooling the condenser. The refrigeration is performed by opening and closing the on-off valve. Use evaporator and the or simultaneously refrigerant to the freezer compartment evaporator flows, the is either only the freezer compartment evaporator or refrigerant flows, the freezing chamber at room temperature of the refrigerating chamber is less than the predetermined set temperature When the room temperature of the refrigerator is equal to or lower than a predetermined set temperature, a refrigerant is simultaneously supplied to the refrigerator for the refrigerator compartment and the evaporator for the freezer compartment to reduce the rotational speed of the condenser fan and the refrigeration capacity of the compressor. It is a feature.
[0005]
Further, the present invention is a refrigerator having the above-described configuration, and includes a refrigerator room fan that sends cold air to the refrigerator room and a freezer room fan that sends cold air to the refrigerator room, and the room temperature of the refrigerator room is a predetermined set temperature. As described above, when the room temperature of the freezer compartment is equal to or lower than a predetermined set temperature, the number of rotations of the freezer compartment fan is reduced .
[0006]
The present invention also includes at least a refrigeration room and a freezing room, a refrigeration room temperature sensing device that senses the room temperature of the refrigeration room, a freezing room temperature sensing device that senses the room temperature of the freezing room, and a refrigeration cycle by circulating refrigerant. Corresponding to the variable capacity compressor, the refrigerating room evaporator and the freezing room evaporator connected in parallel to the compressor, the refrigerating room evaporator and the freezing room evaporator, respectively. Refrigerating room throttling device and freezing room throttling device provided, the refrigerating room throttling device , the condenser disposed between the freezing room throttling device and the compressor, and the refrigerating room throttling device And an open / close valve disposed between the condenser and the condenser, and when the open / close valve is opened / closed during refrigeration cycle operation , refrigerant flows into the refrigerator for freezer compartment and the evaporator for freezer compartment at the same time, or the freezer Refrigerant flows only to the room evaporator Of being either said when room temperature of the refrigerating compartment climate of the freezing chamber above a predetermined set temperature is below a predetermined set point temperature, at the same time refrigerant in the refrigerator compartment evaporator and an evaporator for the freezing chamber The switching temperature for switching the refrigerating capacity of the compressor is set high by sensing the freezer temperature sensing device .
[0007]
Further, the present invention is characterized in that, in the refrigerator configured as described above, when the room temperature of the freezer compartment is lower than the switching temperature, the refrigerating capacity of the compressor is lowered as compared with a case where it is higher .
[0008]
The present invention further includes a condenser fan for cooling the condenser in the refrigerator configured as described above, wherein the number of rotations of the condenser fan is lower than that when the room temperature of the freezer compartment is higher than the switching temperature. It is characterized by making it.
[0009]
Further, the present invention is a refrigerator having the above-described configuration, and includes a refrigerator room fan that sends cold air to the refrigerator room and a freezer room fan that sends cold air to the freezer room, and the room temperature of the freezer room is higher than the switching temperature. The number of rotations of the freezer compartment fan is lowered when the temperature is lower than when it is higher .
[0010]
Further, the present invention is characterized in that, in the refrigerator configured as described above, the amount of squeezing of the refrigeration chamber squeezing device and the freezing chamber squeezing device is varied in accordance with the room temperature of the refrigeration chamber and the room temperature of the freezing chamber. It is.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the refrigerator of the present invention will be described with reference to the drawings.
[0012]
FIG. 1 is a block diagram of a refrigerator of the present invention. In FIG. 1, 1 is a compressor, 2 is a condenser, 3 is a freezer compartment throttle device connected to a freezer compartment evaporator 4, 5 is an on-off valve, and 6 is A refrigerator for the refrigerator compartment connected to the evaporator 7 for the refrigerator compartment, 8 is a condenser fan for cooling at least a part of the condenser 2, and 9 is a freezer compartment that cools the cold air cooled by the evaporator 4 for the refrigerator compartment. 10 is a freezer compartment fan for sending out to 10, 11 is a refrigerator compartment fan for sending out the cold air cooled in the refrigerator compartment evaporator 7 to the refrigerator compartment 12, 13 is a freezer temperature sensor, and 14 is a refrigerator temperature. It is a sensing device.
[0013]
The freezer compartment expansion device 3, the freezer compartment evaporator 4, the on-off valve 5, the refrigerator compartment expansion device 6, and the refrigerator compartment evaporator 7 are connected in parallel, and the compressor 1, the condenser 2, the freezer The room throttle device 3, the freezer compartment evaporator 4, the on-off valve 5, the refrigerator compartment throttle device 6, and the refrigerator compartment evaporator 7 form a refrigeration cycle.
[0014]
When both the freezer compartment 10 and the refrigerator compartment 12 are higher than a set temperature (for example, the set temperature is −18 ° C. for the freezer compartment 10 and 5 ° C. for the refrigerator compartment 12), the freezer compartment temperature sensing device 13 and the refrigerator compartment temperature sensing device are used. 14 senses the room temperature, the compressor 1 is operated by a control device (not shown), and the refrigerant liquefied by the condenser 2 passes through the freezing chamber expansion device 3 and evaporates in the freezing chamber evaporator 4. The refrigerant deprived of heat from the surrounding air flows, and the refrigerant liquefied by the condenser 2 passes through the open on-off valve 5, passes through the refrigerator for the refrigerator compartment 6 and evaporates in the evaporator 7 for the refrigerator. Heat is taken from the air and flows back to the compressor 1 in a vaporized state to form a series of refrigeration cycles.
[0015]
At this time, the condenser fan 8, the freezer compartment fan 9, and the refrigerator compartment fan 11 are also operated in synchronization. The condenser fan 8 cools the condenser 2 and helps liquefy the refrigerant. The refrigeration room fan 11 sends cold air cooled by the refrigeration room evaporator 4 and the refrigeration room evaporator 7 to the freezing room 10 and the refrigeration room 12, respectively, and the freezing room 10 and the refrigeration room 12 are brought to a predetermined room temperature. It will cool. Therefore, even if a lot of stored items are newly stored in the freezer compartment 10 or the refrigerator compartment 12 at the same time, the stored items are immediately cooled and deterioration of the stored items can be prevented.
[0016]
When the refrigerator compartment 12 reaches a predetermined room temperature (for example, 3 ° C.), the on-off valve 5 is closed and the refrigerant does not flow into the refrigerator compartment evaporator 7. And after predetermined time passes, the fan 11 for refrigerator compartments is stopped.
[0017]
At this time, if the freezer compartment 10 is not at a predetermined temperature (for example, −18 ° C.), the operation of the compressor 1, the condenser fan 8 and the freezer compartment fan 9 is continued. Is reduced to a predetermined value by a control device (not shown), and at the same time, the condenser fan 8 is also lowered to the number of rotations corresponding to the capacity. Therefore, the compressor 1 and the condenser fan 8 are operated efficiently, leading to energy saving.
[0018]
If the operation of the refrigerating room fan 11 is reduced to a predetermined number of rotations and the operation is continued as described above, it is useful for stirring the cool air in the refrigerating room 12, and further, the refrigerating room evaporator 7 is used. Is in a frosted state, it is useful for defrosting the evaporator 7 for refrigeration room by the cool air in the refrigeration room 12, and also for humidifying the refrigeration room 12 by the defrosting.
[0019]
In addition, when the refrigerator compartment 12 becomes higher than a predetermined room temperature (for example, 5 ° C.) and the freezer compartment 10 is below the predetermined room temperature (for example, −18 ° C.), the freezer temperature The sensing device 13 and the refrigerating room temperature sensing device 14 sense the respective room temperature, and based on the sensed temperature, the control device (not shown) sets the refrigerating capacity of the compressor 1 according to the necessary capacity. Both of the chambers 12 are operated at a lower capacity than when the freezing chamber 10 and the refrigerating chamber 12 are simultaneously cooled higher than a set temperature (for example, the set temperature is −18 ° C. for the freezing chamber 10 and 5 ° C. for the refrigerating chamber 12) Since the rotation speed of the condenser fan 8 and the freezer compartment fan 9 is also lowered and operated by a control device (not shown) accordingly, the compressor 1, the condenser fan 8 and the freezer compartment fan 9 are efficiently operated. Operation will lead to energy savings.
[0020]
At this time, in order to prevent the freezer compartment 10 from being in an excessively cooled state (for example, a temperature of −21 ° C. or less), the switching temperature for the freezer compartment by the freezer compartment temperature sensing device 13 is increased ( (For example, the switching temperature is raised from -21 ° C. to -19 ° C.) The setting of the control device (not shown) is changed based on the respective room temperatures, and the freezer temperature sensing device 13 or the refrigeration is changed. Rather than when the freezing room 10 and the refrigerating room 12 are simultaneously cooled according to the required capacity of the compressor 1 based on the sensing state of the room temperature sensing device 14 according to the necessary capacity. It is switched and is operated with a low capacity, and the rotation speed of the condenser fan 8 and the freezer compartment fan 9 is also switched and lowered by a control device (not shown) accordingly.
[0021]
As a result, the freezing chamber 10 is not cooled (supercooled) more than necessary, and the cooling state can be appropriately maintained against the intrusion of heat from the outside, and the number of ON-OFF times of the compressor 1 is increased. For this reason, there is no increase in power consumption required when starting up the compressor 1, the power consumption is low, and the refrigerator compartment 12 and the freezer compartment 10 can be efficiently cooled. The machine fan 8 and the freezer fan 9 are operated, which leads to further energy saving.
[0022]
At this time, as a means for changing the refrigerating capacity of the compressor, a method of reducing the number of rotations of the compressor motor and reducing the number of refrigerant compressions of the piston moving in conjunction therewith, reducing the refrigerant circulation amount in the refrigerating cycle, or the freezing chamber throttling device 3 Further, the refrigerator for the refrigerator compartment 6 is a throttle device including at least a part of a switchable throttle device in combination of a variable throttle valve, an on-off valve and a capillary tube adapted to several states, and a refrigerant suitable for those states The throttle state may be a flow or a pressure difference (for example, the freezing room throttling device 3 or the refrigerating room throttling device 6 is throttled according to the lowering ability of the compressor 1).
[0023]
【The invention's effect】
Since the refrigerator of the present invention is configured as described above, according to the present invention, an optimal cooling effect can be obtained in accordance with load fluctuations in both the refrigerator compartment and the freezer compartment, and a highly efficient refrigeration cycle with little energy loss can be achieved. A refrigerator with a cup is obtained.
[Brief description of the drawings]
FIG. 1 is a block diagram of a refrigerator according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Compressor 2 Condenser 3 Freezer compartment throttling device 4 Freezer compartment evaporator 5 On-off valve 6 Refrigerating room throttling device 7 Refrigerating room evaporator 8 Condenser fan 9 Freezer compartment fan 10 Freezer compartment 11 Refrigerating room fan 12 Cold room 13 Freezer room temperature sensing device 14 Cold room temperature sensing device

Claims (7)

少なくとも冷蔵室と冷凍室をもち、前記冷蔵室の室温を感知する冷蔵室温度感知装置と、前記冷凍室の室温を感知する冷凍室温度感知装置と、冷媒の流通により冷凍サイクルを運転する能力可変の圧縮機と、前記圧縮機に並列に接続された冷蔵室用蒸発器及び冷凍室用蒸発器と、前記冷蔵室用蒸発器及び前記冷凍室用蒸発器にそれぞれ対応して設けられた冷蔵室用絞り装置及び冷凍室用絞り装置と、前記冷蔵室用絞り装置及び前記冷凍室用絞り装置と前記圧縮機との間に配される凝縮器と、前記冷蔵室用絞り装置と前記凝縮器との間に配される開閉弁と、前記凝縮器を冷却する凝縮器用ファンとを備え、冷凍サイクル運転時には前記開閉弁の開閉によって、前記冷蔵室用蒸発器及び前記冷凍室用蒸発器に同時に冷媒が流れるか、前記冷凍室用蒸発器のみに冷媒が流れるかのいずれかであり、前記冷蔵室の室温が所定の設定温度以上で前記冷凍室の室温が所定の設定温度以下のときに、前記冷蔵室用蒸発器及び前記冷凍室用蒸発器に同時に冷媒を流して前記凝縮器用ファンの回転数及び前記圧縮機の冷凍能力を低下させることを特徴とする冷蔵庫。 A refrigerating room temperature sensing device that has at least a refrigerating room and a freezing room, senses the room temperature of the refrigerating room, a freezing room temperature sensing device that senses the room temperature of the freezing room, and a variable capacity for operating a refrigerating cycle by circulating refrigerant. and the compressor, the compression-connected refrigerator compartment evaporator in parallel with the machine and the freezer compartment evaporator, provided to respectively correspond to the refrigerator compartment evaporator and an evaporator for the freezing chamber cold Room squeezing device and freezing room squeezing device , refrigerator for refrigeration chamber, condenser placed between freezing room squeezing device and compressor , refrigerator for refrigeration chamber and condenser And a condenser fan for cooling the condenser. During the refrigerating cycle operation , the refrigerating room evaporator and the freezing room evaporator are simultaneously opened and closed by opening and closing the opening / closing valve. Refrigerant flows or for the freezer compartment Hatsuki is only either the refrigerant flows, said when room temperature of the refrigerating compartment climate of the freezing chamber above a predetermined set temperature is lower than a predetermined set temperature, the refrigerating compartment evaporator and the freezing A refrigerator is characterized in that a refrigerant is simultaneously supplied to a room evaporator to reduce the number of rotations of the condenser fan and the refrigerating capacity of the compressor . 前記冷蔵室に冷気を送出する冷蔵室用ファンと前記冷凍室に冷気を送出する冷凍室用ファンとを備え、前記冷蔵室の室温が所定の設定温度以上で前記冷凍室の室温が所定の設定温度以下のときに、前記冷凍室用ファンの回転数を低下させることを特徴とする請求項１に記載の冷蔵庫。 A refrigerating room fan for sending cold air to the refrigerating room and a freezer room fan for sending cold air to the freezing room, wherein the room temperature of the refrigerating room is equal to or higher than a predetermined set temperature and the room temperature of the freezing room is set to a predetermined value The refrigerator according to claim 1 , wherein when the temperature is equal to or lower than the temperature, the number of rotations of the freezer fan is decreased . 少なくとも冷蔵室と冷凍室をもち、前記冷蔵室の室温を感知する冷蔵室温度感知装置と、前記冷凍室の室温を感知する冷凍室温度感知装置と、冷媒の流通により冷凍サイクルを運転する能力可変の圧縮機と、前記圧縮機に並列に接続された冷蔵室用蒸発器及び冷凍室用蒸発器と、前記冷蔵室用蒸発器及び前記冷凍室用蒸発器にそれぞれ対応して設けられた冷蔵室用絞り装置及び冷凍室用絞り装置と、前記冷蔵室用絞り装置及び前記冷凍室用絞り装置と前記圧縮機との間に配される凝縮器と、前記冷蔵室用絞り装置と前記凝縮器との間に配される開閉弁とを備え、冷凍サイクル運転時には前記開閉弁の開閉によって、前記冷蔵室用蒸発器及び前記冷凍室用蒸発器に同時に冷媒が流れるか、前記冷凍室用蒸発器のみに冷媒が流れるかのいずれかであり、前記冷蔵室の室温が所定の設定温度以上で前記冷凍室の室温が所定の設定温度以下のときに、前記冷蔵室用蒸発器及び前記冷凍室用蒸発器に同時に冷媒を流し、前記冷凍室温度感知装置の感知によって前記圧縮機の冷凍能力を切り替える切替温度を高く設定したことを特徴とする冷蔵庫。 A refrigerating room temperature sensing device that has at least a refrigerating room and a freezing room, senses the room temperature of the refrigerating room, a freezing room temperature sensing device that senses the room temperature of the freezing room, and a variable capacity for operating a refrigerating cycle by circulating refrigerant. of a compressor, said chillers are connected in parallel to the compressor evaporator and the freezer compartment evaporator, the refrigerator compartment evaporator and the freezer compartment evaporator to the refrigerator compartment provided corresponding Squeezing device for freezing room, squeezing device for freezer compartment, condenser for refrigeration room squeezing device, squeezing device for freezer compartment, and compressor , squeezing device for refrigeration room, and condenser An open / close valve disposed between the two, and during the refrigerating cycle operation, the open / close valve opens and closes to cause a refrigerant to flow simultaneously to the refrigerating room evaporator and the freezer room evaporator, or only the freezer room evaporator. The refrigerant flows through Ri, wherein when room temperature of the refrigerating compartment climate of the freezing chamber above a predetermined set temperature is lower than a predetermined set temperature, poured simultaneously refrigerant to the refrigerator compartment evaporator and the freezer compartment evaporator, the freezing A refrigerator characterized in that a switching temperature for switching the refrigeration capacity of the compressor is set high by sensing of a room temperature sensing device . 前記冷凍室の室温が前記切替温度よりも低い場合に高い場合よりも前記圧縮機の冷凍能力を低下させることを特徴とする請求項３に記載の冷蔵庫。 The refrigerator according to claim 3, wherein when the room temperature of the freezer compartment is lower than the switching temperature, the refrigerating capacity of the compressor is lowered than when the room temperature is higher . 前記凝縮器を冷却する凝縮器用ファンを備え、前記冷凍室の室温が前記切替温度よりも低い場合に高い場合よりも前記凝縮器用ファンの回転数を低下させることを特徴とする請求項４に記載の冷蔵庫。 5. The condenser fan for cooling the condenser is provided, and the number of rotations of the condenser fan is decreased when the room temperature of the freezer compartment is lower than the switching temperature as compared with a case where it is higher. Refrigerator. 前記冷蔵室に冷気を送出する冷蔵室用ファンと前記冷凍室に冷気を送出する冷凍室用ファンとを備え、前記冷凍室の室温が前記切替温度よりも低い場合に高い場合よりも前記冷凍室用ファンの回転数を低下させることを特徴とする請求項４または請求項５に記載の冷蔵庫。 A freezer compartment fan for delivering cold air to the refrigerating room and a freezer fan for delivering cold air to the freezer compartment, wherein the freezer compartment is higher than when the room temperature of the freezer compartment is lower than the switching temperature The refrigerator according to claim 4 or 5, wherein the rotational speed of the fan is reduced . 前記冷蔵室の室温及び前記冷凍室の室温に応じて前記冷蔵室用絞り装置及び前記冷凍室用絞り装置の絞り量を可変したことを特徴とする請求項１〜請求項６のいずれかに記載の冷蔵庫。7. The squeezing amount of the refrigeration chamber squeezing device and the refrigeration chamber squeezing device is varied in accordance with the room temperature of the refrigeration chamber and the room temperature of the freezer compartment. Refrigerator.
JP2000092729A 2000-03-30 2000-03-30 refrigerator Expired - Fee Related JP3710353B2 (en)

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