JP2007212053A - Refrigerator - Google Patents

Refrigerator Download PDF

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JP2007212053A
JP2007212053A JP2006033024A JP2006033024A JP2007212053A JP 2007212053 A JP2007212053 A JP 2007212053A JP 2006033024 A JP2006033024 A JP 2006033024A JP 2006033024 A JP2006033024 A JP 2006033024A JP 2007212053 A JP2007212053 A JP 2007212053A
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temperature
cooling
switching chamber
infrared sensor
tray
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Yoshiyuki Noguchi
義之 野口
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Toshiba Corp
Toshiba Consumer Marketing Corp
Toshiba Lifestyle Products and Services Corp
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Toshiba Corp
Toshiba Consumer Marketing Corp
Toshiba Home Appliances Corp
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Priority to JP2006033024A priority Critical patent/JP2007212053A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2400/00General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/28Quick cooling

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  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of cooling in a wide range from a freezing temperature of -18°C or lower to a refrigerating temperature of a freezing point or higher with a temperature switching chamber for allowing a user to selectively set the temperature, actualizing effective quick cooling control while eliminating temperature effects due to new food materials charged into another storage chamber such as a freezing chamber by using an infrared sensor for detecting the temperature of cooled food materials stored in the switching chamber for cooling management. <P>SOLUTION: The refrigerator comprises the temperature switching chamber 5 of relatively small capacity having quick cooling function for setting a room temperature in multiple temperature ranges including a freezing temperature, a tray 15 for storing a cooling load installed in the switching chamber, and the infrared sensor 12 for detecting the temperature of the cooling load in the tray. The infrared sensor is installed on the ceiling surface of the switching chamber opposed to the tray. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、室内を冷凍仕様を含む多温度領域に設定が可能な温度切替室を備えた冷蔵庫に関する。   The present invention relates to a refrigerator provided with a temperature switching chamber capable of setting a room in a multi-temperature region including a refrigeration specification.

近年、冷蔵庫の使用形態として、食材をまとめ買いするとともにこれをそれぞれ所定分量に小分けした上で冷凍保存したり、あらかじめ大量に調理した食材を一人分などの分量に分けて冷凍する、いわゆるホームフリージングが増加している。このホームフリージングは、まとめ買いによって食材が安価に購入できる利点や、必要量だけ解凍し調理できるので時間や手間が効率化できるなどの効果を奏するものである。   In recent years, as a form of use of refrigerators, so-called home freezing, in which ingredients are bought together and subdivided into predetermined amounts and stored in a frozen state, or food prepared in advance in large quantities is frozen in portions such as one person. It has increased. This home freezing has the advantage that the ingredients can be purchased at a low price by bulk buying, and the time and labor can be made more efficient because the necessary amount can be thawed and cooked.

そして、通常食材を冷凍させる場合は、ラッピングした対象食材を金属トレイ上に載置したり金属製容器に詰めて冷凍室内に収納するとともに、使用者の任意操作によって冷蔵庫の運転状態を急速冷凍モードに設定し、所定時間、例えば150分間に亙って圧縮機を70Hz程度の高い周波数や冷却ファンを2000回転/分などの最大回転数で連続運転し、冷凍室内の温度を一気に約−40℃まで低下させることにより食材の組織を破壊せずに冷凍するようにしていた。   And when freezing ordinary foods, the wrapped target food is placed on a metal tray or packed in a metal container and stored in the freezer compartment, and the operation state of the refrigerator is set to a quick freezing mode by a user's arbitrary operation. The compressor is continuously operated for a predetermined time, for example, 150 minutes, at a high frequency of about 70 Hz, and the cooling fan is continuously operated at a maximum speed of 2000 rpm, and the temperature in the freezer compartment is about -40 ° C. It was made to freeze without destroying the structure | tissue of a foodstuff by making it reduce to.

しかしながら上記構成の場合、冷却対象空間が冷凍室であり、容積が100L前後と大きいため、急速冷凍の際は冷凍室全体を冷却することになってきわめて大きな冷却力を必要とし、また、対象食材以外の既に冷凍貯蔵されている食材に対しては、前記急速冷凍は不必要な冷却運転となることからエネルギーが無駄となる欠点があった。さらに、調理後で余熱を持っている食材を急速冷凍処理した場合には、余熱により冷凍室内温度が一時的に上昇することになり、室内における他の冷凍貯蔵品が悪影響を受ける恐れがあった。   However, in the case of the above configuration, the space to be cooled is a freezer compartment, and the volume is as large as around 100 L. Therefore, the entire freezer compartment is cooled during quick freezing, and a very large cooling power is required. For foods that have already been frozen and stored other than the above, the quick freezing is an unnecessary cooling operation, which has a disadvantage of wasting energy. In addition, when food that has residual heat after cooking is subjected to quick freezing, the temperature of the freezing room temporarily rises due to the residual heat, and other frozen stored items in the room may be adversely affected. .

本発明は上記事情を考慮してなされたものであり、−17℃以下の冷凍温度から氷点以上の冷蔵温度まで広範囲な冷却が可能で、使用者が任意にこれを設定できる温度切替室を備えた冷蔵庫において、切替室内に収納した冷却対象食材の温度を赤外線センサーによって検出し冷却管理することで、冷凍室など他の貯蔵室への新たな食材投入による温度影響をなくし、効果的な急速冷却制御ができるようにした冷蔵庫を提供することを目的とするものである。   The present invention has been made in consideration of the above circumstances, and has a temperature switching chamber in which a wide range of cooling is possible from a freezing temperature of −17 ° C. or less to a refrigeration temperature of above freezing point, and the user can arbitrarily set this. In the refrigerator, the temperature of the food to be cooled stored in the switching room is detected and controlled by the infrared sensor, eliminating the influence of temperature due to the addition of new food to other storage rooms such as the freezer, and effective rapid cooling. It is an object of the present invention to provide a refrigerator that can be controlled.

上記課題を解決するために本発明の請求項1記載の冷蔵庫は、室内温度を冷凍温度を含む多温度領域に設定可能で、且つ急速冷却機能を備えた比較的小容量の温度切替室と、この切替室内に設置した冷却負荷を収納するトレイと、このトレイ内の冷却負荷温度を検出する赤外線センサーとを備え、前記赤外線センサーは、トレイに対向する切替室の天井面に設置したことを特徴とするものである。   In order to solve the above problems, a refrigerator according to claim 1 of the present invention is capable of setting a room temperature in a multi-temperature region including a freezing temperature, and has a relatively small-capacity temperature switching chamber having a rapid cooling function; A tray for storing the cooling load installed in the switching chamber and an infrared sensor for detecting the cooling load temperature in the tray are provided, and the infrared sensor is installed on the ceiling surface of the switching chamber facing the tray. It is what.

本発明の構成によれば、温度切替室内で食材を冷却することにより、冷凍室など他の貯蔵室への新たな食材投入による温度影響をなくすことができるとともに、外気温度の影響を受けることなく対象食材の温度を正確に検出して効果的な急速冷却制御をおこなうことができる。   According to the configuration of the present invention, by cooling the food material in the temperature switching chamber, it is possible to eliminate the temperature effect due to the addition of new food material to another storage room such as a freezing room, and without being affected by the outside air temperature. Effective rapid cooling control can be performed by accurately detecting the temperature of the target food.

以下、図面に基づき本発明の1実施形態について説明する。図1は冷蔵庫の概略縦断面図であり、断熱箱体で形成された冷蔵庫本体(1)の内部を貯蔵空間として最上部に冷蔵室(2)、下方に野菜室(3)、最下部には冷凍室(4)をそれぞれ独立して配置し、冷蔵室(2)と野菜室(3)との間には断熱仕切壁を介して温度切替室(5)と図示しない製氷室とを左右に併置しており、各貯蔵室の前面開口には各々専用の扉を設けて開閉自在に閉塞している。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic vertical cross-sectional view of a refrigerator, in which the inside of the refrigerator main body (1) formed of a heat-insulated box is used as a storage space at the top of the refrigerator compartment (2), below the vegetable compartment (3), and at the bottom Has a freezer compartment (4) arranged independently, and a temperature switching chamber (5) and an ice making chamber (not shown) are provided between the refrigerator compartment (2) and the vegetable compartment (3) via a heat insulating partition wall. In addition, each storage room is provided with a dedicated door at the front opening of each storage room and is closed so as to be freely opened and closed.

野菜室(3)の後部には、前記冷凍室(4)や温度切替室(5)、製氷室など冷凍貯蔵空間用の冷却器(6)およびこの冷却器(6)で生成された冷気を貯蔵室内に循環する冷却ファン(7)を配置し、さらに、前記冷凍用冷却器(6)の前方位置に、冷蔵室(2)と野菜室(3)とを冷却する冷蔵貯蔵空間用の冷却器(8)および図示しないファンを設けており、本体下部の機械室に設置した冷媒圧縮機(9)の駆動および冷媒の流路切替弁の切替え制御によって前記冷凍および冷蔵用冷却器(6)、(8)に交互、あるいは双方同時に冷媒を流し、冷却された冷気を冷却ファン(7)や冷蔵用ファンにより冷凍側および冷蔵側の各貯蔵室に送風して、それぞれを所定温度に冷却制御するものである。   In the rear part of the vegetable room (3), the freezer (4), the temperature switching room (5), the cooler (6) for the frozen storage space such as the ice making room, and the cold air generated by the cooler (6) A cooling fan (7) that circulates in the storage chamber is arranged, and further, cooling for the refrigerated storage space that cools the refrigerator compartment (2) and the vegetable compartment (3) in front of the freezer cooler (6). The refrigerator (8) and a fan (not shown) are provided, and the refrigeration and refrigeration cooler (6) is driven by driving the refrigerant compressor (9) installed in the machine room below the main body and switching control of the refrigerant flow path switching valve. , (8) alternately or simultaneously, the refrigerant is flown, and the cooled cold air is blown to the freezing side and the refrigerating side storage chambers by the cooling fan (7) and the refrigerating fan, and each is controlled to be cooled to a predetermined temperature. To do.

冷凍空間用の冷却器(6)から吐出された低温の冷気は冷却ファン(7)によって、冷凍室(4)、製氷室、および温度切替室(5)に分流され、それぞれ専用ダクトを介して送風され冷却される。   The low temperature cold air discharged from the refrigerator (6) for the freezing space is diverted to the freezing room (4), the ice making room, and the temperature switching room (5) by the cooling fan (7), and each via a dedicated duct. It is blown and cooled.

温度切替室(5)については、吹出口(10)から室内に冷気を吹き出し、この冷気で冷却される負荷である食材(11)の温度を赤外線センサー(12)で検出するとともに、あらかじめ設定された温度になるように冷凍サイクルの運転、および前記吹出口(10)近傍に設置した冷気ダンパー(13)を開閉制御することによって室内への冷気導入量を調整し、食材を−17℃以下の冷凍温度から−9℃程度の弱冷凍温度、−3℃の部分凍結温度、約0℃のチルド温度、1℃程度の冷蔵温度、あるいは、5℃の野菜保存温度や約8℃のワイン保存温度などまで任意に切り替えて所定の設定温度になるよう制御する。   As for the temperature switching chamber (5), cool air is blown into the room from the air outlet (10), and the temperature of the food (11), which is a load cooled by the cold air, is detected by the infrared sensor (12) and set in advance. The amount of cold air introduced into the room is adjusted by operating the refrigeration cycle so as to reach a high temperature and controlling the opening and closing of the cold air damper (13) installed in the vicinity of the air outlet (10). Weak freezing temperature from -9 ° C to -9 ° C, partial freezing temperature of -3 ° C, chilled temperature of about 0 ° C, refrigeration temperature of about 1 ° C, vegetable storage temperature of 5 ° C and wine storage temperature of about 8 ° C Etc., and so on to control to a predetermined set temperature.

また、前記温度切替室(5)は、上記の各冷却温度に設定できるほか、使用者の任意の指定により、冷凍サイクルや冷却ファンを連続運転するように制御し、室内を急速冷凍や急速冷蔵など所望の冷却温度まで急速に冷却する急速冷却機能を有している。   In addition, the temperature switching chamber (5) can be set to each of the above cooling temperatures, and can be controlled so that the refrigeration cycle and the cooling fan are continuously operated according to the user's arbitrary designation, so that the room can be quickly frozen or rapidly refrigerated. For example, it has a rapid cooling function for rapidly cooling to a desired cooling temperature.

温度切替室(5)は、要部の詳細断面を図2に示すように、貯蔵室の前面開口を閉塞する扉(14)の室内側に固着された図示しない支持枠に容器状のトレイ(15)を保持し、この支持枠を切替室(5)の底壁に形成した図示しないレールに係合させて前後に摺動可能な引き出し方式としており、開扉動作とともに室外に引き出してトレイ(15)の上面開口から食材(11)を収納し、また取り出すものである。   As shown in FIG. 2, the temperature switching chamber (5) has a container-shaped tray (not shown) fixed to the indoor side of a door (14) that closes the front opening of the storage chamber. 15) is held, and this support frame is engaged with a rail (not shown) formed on the bottom wall of the switching chamber (5) so that it can slide back and forth. The food (11) is stored and removed from the top opening of 15).

トレイ(15)の後部壁はわずかに低くして、背面に形成した冷気吹出口(10)からの冷気をトレイ内に導入するように構成しており、吹出口(10)の奥方にはモーターで駆動される前記冷気ダンパー(13)を設け、トレイ(15)内に収納した食材(11)の検出温度と設定温度とを比較し、検出温度が設定温度より高ければダンパー(13)を開き、低ければ閉じて吹出口(10)を閉塞するように開閉制御することで切替室(5)内の温度を所定温度に保持させている。また、温度切替室(5)を高温度に設定した場合には、室内温度を上昇させるためのヒーターを切替室(5)底面に配設している。   The rear wall of the tray (15) is slightly lowered so that cold air from the cold air outlet (10) formed on the back surface is introduced into the tray. The cold air damper (13) that is driven by the above is installed, the detected temperature of the food (11) stored in the tray (15) is compared with the set temperature, and if the detected temperature is higher than the set temperature, the damper (13) is opened. The temperature in the switching chamber (5) is maintained at a predetermined temperature by controlling opening and closing so as to close and close the outlet (10) if low. When the temperature switching chamber (5) is set to a high temperature, a heater for increasing the room temperature is disposed on the bottom surface of the switching chamber (5).

しかして、温度切替室(5)の天井面の奥方には断熱壁側に凹陥する凹部(16)を形成し、この凹部(16)内に前記赤外線センサー(12)を配設することで、下方に位置するトレイ(15)内の冷却負荷である食材(11)の温度を検出するようにしている。   Thus, a recess (16) that is recessed toward the heat insulating wall is formed in the back of the ceiling surface of the temperature switching chamber (5), and the infrared sensor (12) is disposed in the recess (16). The temperature of the food material (11), which is a cooling load in the tray (15) located below, is detected.

赤外線センサー(12)は、トレイ(15)に収納されている食材(11)が有する熱エネルギーを赤外線の放射量として検出するものであって、検出された熱エネルギーの値を電気信号としてコンピュータの信号制御回路に入力し、演算部で算出して温度信号として出力する。そして、この演算部の値を基に、制御部でダンパー(13)を開閉することによって導入冷気量を調整し、切替室(5)の冷却を制御するものであり、冷却負荷からの熱エネルギーを受光するため、1個あるいは複数個の赤外線センサー(11)をトレイ(15)の上部に配置するとともに、検出した食材(11)の負荷温度は、冷蔵室(2)の扉表面に設けた操作パネル(17)などの表示部に表示する。   The infrared sensor (12) detects the thermal energy of the food (11) stored in the tray (15) as the amount of infrared radiation, and uses the detected thermal energy value as an electrical signal for the computer. The signal is input to the signal control circuit, calculated by the calculation unit and output as a temperature signal. Then, based on the value of the calculation unit, the control unit adjusts the amount of cool air introduced by opening and closing the damper (13) to control the cooling of the switching chamber (5), and the heat energy from the cooling load. In order to receive light, one or a plurality of infrared sensors (11) are arranged on the top of the tray (15), and the detected load temperature of the food (11) is provided on the door surface of the refrigerator compartment (2). Display on the display panel of the operation panel (17).

したがって、赤外線センサー(11)は、冷却負荷である食材(11)の投入時には、食材自体の温度を検出することから、冷凍温度やチルド温度などの設定温度との比較で冷却指示が出され、温度切替室(5)内の対象冷却物に沿った温度制御をおこなうことができるものである。   Therefore, the infrared sensor (11) detects the temperature of the food material itself when the food material (11), which is a cooling load, is put in, so that a cooling instruction is issued by comparison with a set temperature such as a freezing temperature or a chilled temperature, The temperature control along the target cooling object in the temperature switching chamber (5) can be performed.

例えば、切り替え機能として急速冷凍を選択する際には、使用者が操作パネル(17)で所定の指定操作をおこなうことにより、従来と同様、圧縮機(9)の回転数を最大周波数に上げ、冷凍用冷却器(6)の蒸発温度を低下させて冷却ファン(7)の回転数を最大にする。そして、ダンパー(13)を経由した冷気を切替室(5)内のトレイ(15)部に導入し、投入された食材(11)を急速に冷却する冷凍運転を開始するが、150分間などの所定の急速冷凍時間を設定し、その間冷却運転を継続する従来方法に比較して、負荷である食材(11)自体の冷却温度を検出することにより冷却継続および終了をおこなうことで、無駄のない効率的な冷却運転制御を実行することができる。   For example, when selecting quick freezing as the switching function, the user performs a predetermined designated operation on the operation panel (17), thereby increasing the rotational speed of the compressor (9) to the maximum frequency as in the past, The evaporation temperature of the refrigeration cooler (6) is lowered to maximize the rotation speed of the cooling fan (7). Then, the cold air passing through the damper (13) is introduced into the tray (15) part in the switching chamber (5), and the freezing operation for rapidly cooling the introduced food (11) is started. Compared to the conventional method in which a predetermined quick freezing time is set and the cooling operation is continued during that time, the cooling (continuation and termination) is performed by detecting the cooling temperature of the food (11) that is the load, so there is no waste. Efficient cooling operation control can be executed.

すなわち、トレイ(15)に収納された食材(11)は、天井面に設置した赤外線センサー(12)によってその温度がモニターされ、単位時間当たりの温度変化の割合が制御部によって計算される。食材(11)の温度は冷却の進行とともに低下し、0℃に到達した時点からは冷気の熱エネルギーが水から氷への相変化に使われるため温度低下がなくなるが、食材全体が凍結すると冷気の熱エネルギーが相変化に使われなくなるため、食材(11)の温度は急激に低下する。   That is, the temperature of the food (11) stored in the tray (15) is monitored by the infrared sensor (12) installed on the ceiling surface, and the rate of temperature change per unit time is calculated by the control unit. The temperature of the food (11) decreases with the progress of cooling, and when it reaches 0 ° C, the heat energy of the cold air is used for the phase change from water to ice, but the temperature does not decrease. The heat energy of the food (11) drops sharply because the heat energy is no longer used for phase change.

したがって、前記温度の変化率が所定の割合を超えた時点で、冷却負荷である食材(11)の凍結が完了したと判定するものであり、切替室として設定された温度を保持するように制御したり、また上記のように、急速冷凍機能が選択されている場合には、急速冷凍運転を終了するものであり、同時に使用者には、操作パネル(17)に表示するとともに、音声やブザー、アラームなどで報知することにより、急速冷凍運転が完了した食材(11)を冷凍室(4)に移し変え、温度切替室(5)を再び他に食材の冷却用途に活用するものである。   Therefore, when the rate of change of the temperature exceeds a predetermined ratio, it is determined that the freezing of the food (11) as the cooling load is completed, and control is performed so as to maintain the temperature set as the switching chamber. If the quick freezing function is selected as described above, the quick freezing operation is terminated, and at the same time, the user is displayed on the operation panel (17), and is By notifying with an alarm or the like, the food (11) for which the quick freezing operation has been completed is transferred to the freezing room (4), and the temperature switching room (5) is used again for other food cooling purposes.

これにより、食材(11)が所望の冷凍温度に達しているにも拘わらず、所定の時間まで冷凍運転を継続するような不必要な冷却をなくしてエネルギーの無駄を省くことができ、また、未だ所望温度まで冷却されていないにも拘わらず、時間経過により急速冷凍運転を終了してしまうような不具合を避けることができるものである。   Thereby, it is possible to eliminate unnecessary cooling such that the refrigeration operation is continued until a predetermined time in spite of the food (11) reaching the desired freezing temperature, and waste of energy can be omitted. Although it has not yet been cooled to the desired temperature, it is possible to avoid such a problem that the quick freezing operation ends with the passage of time.

そして、赤外線センサー(12)は、温度切替室(5)の天井面の奥方に設けた凹部(16)内に配設していることから、その下方に位置する食材(11)の熱エネルギーを直接検出するとともに、開扉によりトレイ(15)を室外に引き出した場合でも流入した外部空気の影響を受けにくくしており、流入した湿度の高い外気によって赤外線センサー(12)の表面が結露するなど影響を受けて食材(11)の温度が検出できなくなることを防ぎ、冷却される食材温度を正確に検出することで的確な凍結終了を検知することができる。   And since the infrared sensor (12) is arrange | positioned in the recessed part (16) provided in the back of the ceiling surface of the temperature switching chamber (5), the thermal energy of the foodstuff (11) located in the downward direction is provided. In addition to direct detection, even when the tray (15) is pulled out of the room by opening the door, it is less affected by the external air that has flowed in, and the surface of the infrared sensor (12) is condensed by the high humidity of the air that has flowed in. It is prevented that the temperature of the food (11) cannot be detected due to the influence, and the accurate freezing end can be detected by accurately detecting the temperature of the food to be cooled.

このとき、赤外線センサー(12)を設置している凹部(16)の開口には、シャッター機構(18)を設けている。このシャッター機構(18)は、切替室(5)の扉(14)が開放されてトレイ(15)が引き出された際には、これを検出して前記シャッター機構(18)を動作させ、前記開口を閉塞するようにしており、また、切替室扉(14)の閉扉とともに前記開口を開放させ、赤外線センサー(12)による食材(11)の温度検出を再開するように構成している。   At this time, a shutter mechanism (18) is provided in the opening of the recess (16) in which the infrared sensor (12) is installed. When the door (14) of the switching chamber (5) is opened and the tray (15) is pulled out, the shutter mechanism (18) detects this and operates the shutter mechanism (18) to The opening is closed, and the opening of the switching chamber door (14) is opened together with the opening of the switching chamber door (14), and the temperature detection of the food (11) by the infrared sensor (12) is resumed.

これにより、トレイ(15)を引き出した際の切替室(5)内への外気の進入による赤外線センサー(12)の露付きなどの弊害をさらに確実になくすことができ、より正確な冷却負荷食材の温度検出をおこなうことができる。   As a result, harmful effects such as dew of the infrared sensor (12) due to the entry of outside air into the switching chamber (5) when the tray (15) is pulled out can be eliminated more reliably, and more accurate cooling load ingredients Temperature detection can be performed.

また、温度切替室(5)は、前記冷凍室(4)や野菜室(3)が前述のごとく、それぞれ100L前後の大容量であるのに対して、これらとは断熱され独立した通常20L前後の比較的小容量の貯蔵空間であることから、冷却のための冷気量は少量でよく、さらに、例えば、冷凍室内(4)において新たな食材を急速冷凍する際にも、室内で既に冷凍貯蔵されている負荷に温度影響を与えるなどの問題を生じることがなく、不必要な冷却エネルギーを消費する無駄がない。   The temperature switching chamber (5) has a large capacity of about 100L as described above in the freezing room (4) and the vegetable room (3), respectively. Since the storage space has a relatively small capacity, the amount of cold air for cooling may be small. Further, for example, when fresh food is rapidly frozen in the freezer compartment (4), it is already frozen and stored indoors. There is no problem such as temperature influence on the load being used, and there is no waste of consuming unnecessary cooling energy.

次に、本発明の他の実施例を前記実施例と同一部分に同一符号を附した図3により説明する。本実施例は、温度切替室(5)に設けたトレイ(15)内に位置するように、ターンテーブル(20)を設けたことを特徴としている。   Next, another embodiment of the present invention will be described with reference to FIG. This embodiment is characterized in that a turntable (20) is provided so as to be located in a tray (15) provided in the temperature switching chamber (5).

ターンテーブル(20)は、必要に応じてトレイ(15)に取り付けられるように着脱自在にしたものであり、切替室扉(14)の閉扉時において、トレイ(15)が所定位置にあるときには、トレイ(15)の底面を貫通する回転軸(21)の下端に固着したギア(22)と、切替室(5)の下部断熱壁の後方に配置した駆動モーター(23)に連結するギア(24)とを係合させるようにしており、急速冷凍時などの冷却運転時には、通電により前記モーター(23)を駆動することによるギア(24)とギア(22)の係合によってターンテーブル(20)を低速で回転させ、テーブル上の冷却負荷である食材(11)が赤外線センサー(12)下方の検出ゾーン内に位置するように設置する。   The turntable (20) is detachable so that it can be attached to the tray (15) as needed. When the tray (15) is in a predetermined position when the switching chamber door (14) is closed, A gear (22) fixed to the lower end of the rotating shaft (21) penetrating the bottom surface of the tray (15), and a gear (24) connected to a drive motor (23) disposed behind the lower heat insulating wall of the switching chamber (5) In the cooling operation such as quick freezing, the turntable (20) is engaged by engaging the gear (24) and the gear (22) by driving the motor (23) by energization. Is rotated at a low speed, and the food (11), which is the cooling load on the table, is placed in the detection zone below the infrared sensor (12).

なお、前記ターンテーブル(20)は、その回転軸(21)を上方の赤外線センサー(12)の位置と所定距離ずらして設けており、ターンテーブル(20)上の食材(11)がどの場所に載置されても、回転によって食材(11)からの赤外線放射を赤外線センサー(12)が受光でき、食材(11)の熱エネルギーを確実に赤外線センサー(12)で検知するように構成する。   The turntable (20) is provided with its rotational axis (21) shifted by a predetermined distance from the position of the upper infrared sensor (12), and where the food (11) on the turntable (20) is located. Even if it is placed, the infrared sensor (12) can receive infrared radiation from the food (11) by rotation, and the thermal energy of the food (11) is reliably detected by the infrared sensor (12).

また、開扉によってトレイ(15)を引き出した場合には、前記ギア(22)とギア(24)間の結合が解除されるため、ターンテーブル(20)は回転せず、トレイ(15)とともに外部へ引き出されることになる。   When the tray (15) is pulled out by opening the door, the connection between the gear (22) and the gear (24) is released, so the turntable (20) does not rotate and is attached together with the tray (15). It will be pulled out.

上記構成によれば、新たな冷却対象の食材を温度切替室(5)内に収納し、切替室扉(14)を閉扉して所定の冷却運転を開始した場合には、ターンテーブル(20)の回転によって、ターンテーブル上に載置した食材(11)に対する冷却むらがなくなり、冷却作用を均一にすることが可能になるばかりでなく、センサー(12)の下部を通過する食材(11)の熱エネルギーを複数箇所で確実に検出でき、赤外線センサー(12)の設置を1個にしても負荷温度を正確に検知することができる。   According to the above configuration, when a new cooling target food is stored in the temperature switching chamber (5), the switching chamber door (14) is closed, and a predetermined cooling operation is started, the turntable (20) Rotation of the material eliminates uneven cooling of the food (11) placed on the turntable, making it possible to make the cooling effect uniform, as well as for the food (11) passing under the sensor (12). Thermal energy can be reliably detected at a plurality of locations, and the load temperature can be accurately detected even if only one infrared sensor (12) is installed.

なお、上記各実施例では、温度切替室(5)内に収納した食材(11)の赤外線センサー(12)による冷却制御を、急速冷凍の場合について説明したが、これに限らず、急速冷蔵やチルド温設定など所望の設定温度まで冷却する場合にも適用できるものであることは言うまでもない。   In each of the above-described embodiments, the cooling control by the infrared sensor (12) of the food (11) stored in the temperature switching chamber (5) has been described for the case of quick freezing. Needless to say, the present invention can also be applied to cooling to a desired set temperature such as chilled temperature setting.

本発明の1実施形態である冷蔵庫の概略構成を示す縦断面図である。It is a longitudinal section showing a schematic structure of a refrigerator which is one embodiment of the present invention. 図1の冷蔵庫における温度切替室部分の拡大断面図である。It is an expanded sectional view of the temperature switching chamber part in the refrigerator of FIG. 本発明の他の実施例を示す図2と同一部分の断面図である。It is sectional drawing of the same part as FIG. 2 which shows the other Example of this invention.

符号の説明Explanation of symbols

1 冷蔵庫本体
2 冷蔵室
3 野菜室
4 冷凍室
5 温度切替室
6 冷凍用冷却器
7 冷却ファン
10 冷気吹出口
11 食材
12 赤外線センサー
13 冷気ダンパー
14 切替室扉
15 トレイ
16 凹部
17 操作パネル
18 シャッター機構
20 ターンテーブル
21 回転軸
22、24 ギア
23 駆動モーター
DESCRIPTION OF SYMBOLS 1 Refrigerator body 2 Refrigeration room 3 Vegetable room 4 Freezing room 5 Temperature switching room 6 Cooling cooler 7 Cooling fan
10 Cold air outlet
11 Ingredients
12 Infrared sensor
13 Cold damper
14 Switching room door
15 trays
16 recess
17 Control panel
18 Shutter mechanism
20 Turntable
21 Rotation axis
22, 24 gear
23 Drive motor

Claims (7)

室内温度を冷凍温度を含む多温度領域に設定可能で、且つ急速冷却機能を備えた比較的小容量の温度切替室と、この切替室内に設置した冷却負荷を収納するトレイと、このトレイ内の冷却負荷温度を検出する赤外線センサーとを備え、前記赤外線センサーは、トレイに対向する切替室の天井面に設置したことを特徴とする冷蔵庫。   The room temperature can be set in a multi-temperature region including the refrigeration temperature, and a relatively small capacity temperature switching chamber having a rapid cooling function, a tray for storing a cooling load installed in the switching chamber, And an infrared sensor for detecting a cooling load temperature, wherein the infrared sensor is installed on the ceiling surface of the switching chamber facing the tray. 赤外線センサーは、切替室天井面の比較的奥部に形成した凹部内に設置したことを特徴とする請求項1記載の冷蔵庫。   The refrigerator according to claim 1, wherein the infrared sensor is installed in a recess formed in a relatively deep part of the ceiling surface of the switching chamber. 赤外線センサーを設置した凹部の開口部にはシャッター機構を設け、切替室扉が開放した際にはシャッター機構を動作させて前記開口を閉塞するようにしたことを特徴とする請求項2記載の冷蔵庫。   3. A refrigerator according to claim 2, wherein a shutter mechanism is provided at the opening of the recess in which the infrared sensor is installed, and the shutter is operated to close the opening when the switching chamber door is opened. . トレイ内には冷却負荷を載置して回転するターンテーブルを配置し、前記ターンテーブルはその回転軸を上方の赤外線センサー位置とずらして設けたことを特徴とする請求項1乃至3のいずれかに記載の冷蔵庫。   4. A turntable that rotates with a cooling load placed thereon is disposed in the tray, and the turntable is provided with a rotational axis thereof shifted from an upper infrared sensor position. Refrigerator. 赤外線センサーの検出値から演算部で冷却負荷温度を算出するとともに、この演算部の値を基に制御部によって切替室温度を制御し、検出した負荷温度を表示部に表示するようにしたことを特徴とする請求項1記載の冷蔵庫。   The calculation unit calculates the cooling load temperature from the detection value of the infrared sensor, and the control unit controls the switching room temperature based on the value of the calculation unit, and the detected load temperature is displayed on the display unit. The refrigerator according to claim 1. 切替室を急速冷却仕様とした場合は、赤外線センサーで検出した冷却負荷温度を温度表示部に表示するとともに、冷却負荷の急速冷却が完了した場合には報知するようにしたことを特徴とする請求項5記載の冷蔵庫。   When the switching chamber has a rapid cooling specification, the cooling load temperature detected by the infrared sensor is displayed on the temperature display unit, and a notification is given when the rapid cooling of the cooling load is completed. Item 6. The refrigerator according to Item 5. 演算部で算出した冷却負荷温度の単位時間当たりの降下率が所定値以下になった場合は、急速冷却が完了したと判断することを特徴とする請求項6記載の冷蔵庫。
The refrigerator according to claim 6, wherein when the rate of decrease in the cooling load temperature per unit time calculated by the calculation unit is equal to or less than a predetermined value, it is determined that the rapid cooling is completed.
JP2006033024A 2006-02-09 2006-02-09 Refrigerator Pending JP2007212053A (en)

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