JP6563273B2 - refrigerator - Google Patents

Description

本発明は冷蔵室内に低温区画を設けた冷蔵庫に関する。   The present invention relates to a refrigerator provided with a low-temperature compartment in a refrigerator compartment.

従来の冷蔵庫は特許文献１に開示されている。この冷蔵庫は冷蔵室と、断熱壁を介して冷蔵室の下方に隣接する冷凍室とを備えている。冷蔵室内は区画され、冷蔵区画を上部に形成して冷蔵区画よりも低温の低温区画（チルド室）を底部に形成する。冷凍室及び冷蔵室の背面にはそれぞれ第１、第２冷気通路が配される。冷凍室の背面の第１冷気通路は冷凍室に臨む第１吐出口を有し、圧縮機に接続された冷却器及び冷凍室送風機が配される。冷蔵室の背面の第２冷気通路はダンパを介して第１冷気通路に連通し、冷蔵区画及び低温区画にそれぞれ臨む第２吐出口及び第３吐出口を有して冷蔵室送風機が配される。   A conventional refrigerator is disclosed in Patent Document 1. This refrigerator includes a refrigerating room and a freezing room adjacent to the lower side of the refrigerating room through a heat insulating wall. The refrigerator compartment is partitioned, the refrigerator compartment is formed at the top, and the cold compartment (chilled chamber) having a temperature lower than that of the refrigerator compartment is formed at the bottom. First and second cold air passages are disposed on the back surfaces of the freezer compartment and the refrigerator compartment, respectively. The first cold air passage on the back surface of the freezer compartment has a first discharge port facing the freezer compartment, and a cooler connected to the compressor and a freezer compartment fan are arranged. The second cold air passage at the back of the refrigerator compartment communicates with the first cold air passage via a damper, and has a second outlet and a third outlet facing the refrigerator compartment and the low temperature compartment, respectively, and a refrigerator refrigerator is arranged. .

冷凍室が上限温度を超えると圧縮機及び冷凍室送風機を駆動し、冷却器により生成された冷気が第１吐出口を介して冷凍室に吐出される。これにより、冷凍室が冷却され、冷凍室が下限温度まで降温されると圧縮機及び冷凍室送風機が停止される。   When the freezer compartment exceeds the upper limit temperature, the compressor and the freezer compartment fan are driven, and the cool air generated by the cooler is discharged to the freezer compartment via the first discharge port. Thereby, when the freezer compartment is cooled and the freezer compartment is cooled to the lower limit temperature, the compressor and the freezer compartment fan are stopped.

また、圧縮機の駆動中に冷蔵室が上限温度を超えるとダンパが開かれ、冷却器により生成された冷気が第２吐出口及び第３吐出口を介して冷蔵室に吐出される。これにより、冷蔵室が冷却され、冷蔵室が下限温度まで降温されるとダンパが閉じられる。この時、チルド室は冷却器に近いため冷蔵区画よりも低温の冷気が吐出されるとともに、隣接する冷凍室の冷熱が供給される。これにより、冷蔵区画が冷蔵温度に維持され、低温区画のチルド室が冷蔵区画よりも低温に維持される。   Further, when the refrigerator compartment exceeds the upper limit temperature while the compressor is being driven, the damper is opened, and the cold air generated by the cooler is discharged to the refrigerator compartment via the second discharge port and the third discharge port. As a result, the refrigerator compartment is cooled, and the damper is closed when the refrigerator compartment is cooled to the lower limit temperature. At this time, since the chilled chamber is close to the cooler, cold air having a temperature lower than that of the refrigerated compartment is discharged and cold heat from the adjacent freezer compartment is supplied. Thereby, the refrigeration section is maintained at the refrigeration temperature, and the chilled chamber in the low temperature section is maintained at a lower temperature than the refrigeration section.

特開２０１５−１４４５２号公報（第５頁〜第１５頁、第３図）Japanese Patent Laying-Open No. 2015-14442 (pages 5 to 15, FIG. 3)

上記従来の冷蔵庫によると、チルド室の設定温度が一定であるため、チルド室に貯蔵される貯蔵物が制限される。このため、複数の設定温度に変更できる区画を設けて貯蔵スペースを有効利用できる冷蔵庫に対する市場要求が高くなっている。   According to the conventional refrigerator, since the set temperature of the chilled room is constant, the stored items stored in the chilled room are limited. For this reason, the market request | requirement with respect to the refrigerator which provides the division which can be changed into several preset temperature and can use a storage space effectively is high.

このような要求に対し、チルド室に供給される冷気の経路上にダンパを設けてチルド室の温度を監視し、チルド室に対して冷蔵区画とは独立に冷気を供給することが考えられる。しかしながら、この構成によると、構造が複雑になるとともに部品点数が増加し、冷蔵庫のコストが増大する問題があった。   In response to such a demand, it is conceivable to provide a damper on the path of the cold air supplied to the chilled chamber to monitor the temperature of the chilled chamber and supply cold air to the chilled chamber independently of the refrigerated compartment. However, according to this configuration, there is a problem that the structure becomes complicated and the number of parts increases, which increases the cost of the refrigerator.

本発明は、簡単な構成で冷蔵室内の低温区画の設定温度を変更し、利便性を向上できる冷蔵庫を提供することを目的とする。   An object of this invention is to provide the refrigerator which can change the preset temperature of the low-temperature division in a refrigerator compartment by simple structure, and can improve the convenience.

上記目的を達成するために本発明は、貯蔵物を冷蔵保存する冷蔵区画と前記冷蔵区画よりも低温の低温区画とを有して前記低温区画を底部に配した冷蔵室と、前記冷蔵室の下方に隣接して貯蔵物を冷凍保存する冷凍室と、冷凍サイクルを運転する圧縮機と、前記圧縮機に接続して冷気を生成する冷却器と、前記冷却器が配されるとともに前記冷凍室に臨む第１吐出口を有する第１冷気通路と、ダンパを介して第１冷気通路に連通して前記冷蔵区画に臨む第２吐出口を有する第２冷気通路と、第２冷気通路から分岐して前記低温区画に臨む第３吐出口を有する第３冷気通路と、第１冷気通路に配される第１送風機と、第３冷気通路に吸気側を前記低温区画に向けて配される第２送風機とを備え、前記ダンパを開いた際または前記ダンパを閉じた際の第２送風機の駆動状態を前記低温区画の設定温度に応じて可変したことを特徴としている。   In order to achieve the above object, the present invention includes a refrigeration compartment for storing stored refrigerated and a cold compartment having a temperature lower than that of the refrigeration compartment, the cold compartment disposed at the bottom, and the refrigeration compartment. A freezer compartment for storing stored frozen adjacent to the lower part, a compressor for operating a refrigeration cycle, a cooler connected to the compressor to generate cool air, and the cooler are arranged and the freezer compartment A first cold air passage having a first discharge port facing the first cold air passage, a second cold air passage having a second discharge port communicating with the first cold air passage through a damper and facing the refrigeration compartment, and a second cold air passage. A third cold air passage having a third outlet facing the low temperature compartment, a first blower arranged in the first cold air passage, and a second air arranged in the third cold air passage with the intake side facing the low temperature compartment. And when the damper is opened or the damper is closed It is characterized in that the variable according to the driving state of the second blower to the set temperature of the low temperature compartment.

この構成によると、圧縮機及び第１送風機が駆動されると、冷却器により生成された冷気が第１冷気通路を流通して第１吐出口から冷凍室に吐出される。ダンパが開かれると第２冷気通路及び第３冷気通路を流通する冷気が第２吐出口及び第３吐出口からそれぞれ冷蔵区画及び低温区画に吐出される。この時、第２送風機が駆動されると第３冷気通路から低温区画への冷気流入が抑制される。また、ダンパを閉じた際に第２送風機が駆動されると、低温区画の冷気が第３吐出口から流出して第２吐出口から冷蔵区画に吐出され、冷蔵区画を流通して低温区画に戻る。   According to this configuration, when the compressor and the first blower are driven, the cold air generated by the cooler flows through the first cold air passage and is discharged from the first discharge port to the freezer compartment. When the damper is opened, the cold air flowing through the second cold air passage and the third cold air passage is discharged from the second discharge port and the third discharge port to the refrigeration compartment and the low temperature compartment, respectively. At this time, when the second blower is driven, the inflow of cold air from the third cold air passage to the low temperature section is suppressed. Further, when the second blower is driven when the damper is closed, the cold air in the low temperature section flows out from the third discharge port and is discharged from the second discharge port to the refrigeration section, and flows through the refrigeration section to the low temperature section. Return.

また本発明は、上記構成の冷蔵庫において、前記ダンパを閉じた際に第２送風機を所定風量で駆動するとともに開いた際に第２送風機を前記所定風量よりも低い風量で駆動する第１冷却モードと、前記ダンパを閉じた際に第２送風機を前記所定風量よりも低い風量で駆動するとともに開いた際に第２送風機を前記所定風量よりも低い風量で駆動または停止する第２冷却モードとを備えたことを特徴としている。   In the refrigerator having the above-described configuration, the first cooling mode of driving the second fan with a predetermined air volume when the damper is closed and driving the second fan with an air volume lower than the predetermined air volume when the damper is opened. And a second cooling mode in which the second fan is driven with an air volume lower than the predetermined air volume when the damper is closed and the second fan is driven or stopped with an air volume lower than the predetermined air volume when the damper is opened. It is characterized by having prepared.

また本発明は、上記構成の冷蔵庫において、前記ダンパを閉じた際及び開いた際に第２送風機を停止する第３冷却モードを備えたことを特徴としている。   Further, the present invention is characterized in that the refrigerator having the above-described configuration includes a third cooling mode in which the second blower is stopped when the damper is closed and opened.

また本発明は、上記構成の冷蔵庫において、第１冷却モード時に前記ダンパを閉じた時に第２送風機を停止し、所定の遅延期間が経過した後に第２送風機を前記所定風量に切り替えることを特徴としている。   In the refrigerator having the above-described configuration, the second blower is stopped when the damper is closed in the first cooling mode, and the second blower is switched to the predetermined air volume after a predetermined delay period has elapsed. Yes.

また本発明は、上記構成の冷蔵庫において、第２冷却モード時に前記ダンパを閉じた時に第２送風機を停止し、所定の遅延期間が経過した後に第２送風機を前記所定風量で駆動し、所定時間経過後に前記所定風量よりも低い風量に切り替えることを特徴としている。   According to the present invention, in the refrigerator configured as described above, the second blower is stopped when the damper is closed in the second cooling mode, and the second blower is driven with the predetermined air volume after a predetermined delay period has elapsed. It is characterized by switching to an air volume lower than the predetermined air volume after the passage.

また本発明は、上記構成の冷蔵庫において、前記ダンパを閉じてから前記冷蔵区画が前記ダンパを開く温度よりも低温の所定温度に昇温されるまでを前記遅延期間にしたことを特徴としている。   In the refrigerator configured as described above, the delay period is from when the damper is closed to when the refrigerated compartment is heated to a predetermined temperature lower than a temperature at which the damper is opened.

また本発明は、上記構成の冷蔵庫において、第１冷却モード及び第２冷却モード時に前記ダンパを開いた状態が所定時間継続するとともに前記ダンパを閉じる温度に対して高温の所定温度よりも前記冷蔵区画が低温の場合に、前記ダンパを所定時間閉じて第２送風機を駆動したことを特徴としている。   According to the present invention, in the refrigerator configured as described above, the state in which the damper is opened during the first cooling mode and the second cooling mode continues for a predetermined time, and the refrigeration compartment is higher than the predetermined temperature higher than the temperature at which the damper is closed. When the temperature is low, the damper is closed for a predetermined time to drive the second blower.

本発明によると、第２冷気通路から分岐して低温区画に臨む第３吐出口を有した第３気通路に第２送風機が吸気側を低温区画に向けて配され、ダンパを開いた際またはダンパを閉じた際の第２送風機の駆動状態が低温区画の設定温度に応じて可変される。これにより、簡単な構成で低温区画を複数の設定温度に切り替えることができ、冷蔵庫の利便性を向上することができる。   According to the present invention, when the second blower is disposed in the third air passage having the third discharge port that branches from the second cold air passage and faces the low temperature compartment with the intake side facing the low temperature compartment and the damper is opened or The driving state of the second blower when the damper is closed is varied according to the set temperature of the low temperature section. Thereby, the low temperature section can be switched to a plurality of set temperatures with a simple configuration, and the convenience of the refrigerator can be improved.

本発明の第１実施形態の冷蔵庫を示す正面断面図Front sectional drawing which shows the refrigerator of 1st Embodiment of this invention. 本発明の第１実施形態の冷蔵庫を示す側面断面図Side surface sectional drawing which shows the refrigerator of 1st Embodiment of this invention. 本発明の第１実施形態の冷蔵庫の構成を示すブロック図The block diagram which shows the structure of the refrigerator of 1st Embodiment of this invention. 本発明の第１実施形態の冷蔵庫の第１冷却モードの動作を示すタイムチャートThe time chart which shows operation | movement of the 1st cooling mode of the refrigerator of 1st Embodiment of this invention. 本発明の第１実施形態の冷蔵庫の第２冷却モードの動作を示すタイムチャートThe time chart which shows operation | movement of the 2nd cooling mode of the refrigerator of 1st Embodiment of this invention. 本発明の第１実施形態の冷蔵庫の第３冷却モードの動作を示すタイムチャートThe time chart which shows operation | movement of the 3rd cooling mode of the refrigerator of 1st Embodiment of this invention. 本発明の第２実施形態の冷蔵庫の第１冷却モードの動作を示すタイムチャートThe time chart which shows operation | movement of the 1st cooling mode of the refrigerator of 2nd Embodiment of this invention. 本発明の第２実施形態の冷蔵庫の第２冷却モードの動作を示すタイムチャートThe time chart which shows operation | movement of the 2nd cooling mode of the refrigerator of 2nd Embodiment of this invention.

＜第１実施形態＞
以下に図面を参照して本発明の実施形態を説明する。図１、図２は第１実施形態の冷蔵庫を示す正面図及び側面断面図である。冷蔵庫１は断熱箱体２の上方から順に冷蔵室３、冷凍室４、野菜室５が設けられる。冷蔵室３と冷凍室４との間は断熱壁１７により仕切られ、冷凍室４と野菜室５との間は断熱壁１８により仕切られる。 <First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are a front view and a side sectional view showing the refrigerator of the first embodiment. The refrigerator 1 is provided with a refrigerator compartment 3, a freezer compartment 4, and a vegetable compartment 5 in order from above the heat insulating box 2. The refrigerator compartment 3 and the freezer compartment 4 are partitioned by a heat insulating wall 17, and the freezer compartment 4 and the vegetable compartment 5 are partitioned by a heat insulating wall 18.

冷蔵室３は一端を枢支される回動式の扉３ａによって開閉され、冷蔵室３内には貯蔵物を載置する複数の載置棚３ｂが配される。最下段の載置棚３ｂの下方は縦仕切壁３ｃにより左右に仕切られる。縦仕切壁３ｃにより仕切られた一方にはカバー２２ａにより前面を覆われた低温区画２２が形成される。これにより、冷蔵室３内は貯蔵物を冷蔵保存する冷蔵区画２１と、冷蔵室３の底部に配して冷蔵区画２１よりも低温に維持される低温区画２２とに区画される。   The refrigerator compartment 3 is opened and closed by a pivoting door 3a pivotally supported at one end, and a plurality of placement shelves 3b on which stored items are placed are arranged in the refrigerator compartment 3. The lower part of the lowermost mounting shelf 3b is divided into left and right by a vertical partition wall 3c. On one side partitioned by the vertical partition wall 3c, a low-temperature section 22 whose front surface is covered by a cover 22a is formed. As a result, the inside of the refrigerator compartment 3 is divided into a refrigerator compartment 21 for storing stored items in a refrigerator, and a cold compartment 22 that is disposed at the bottom of the refrigerator compartment 3 and maintained at a lower temperature than the refrigerator compartment 21.

冷凍室４は収納ケース４ｂと一体に形成される引出式の扉４ａによって開閉され、貯蔵物を冷凍保存する。野菜室５は収納ケース５ｂと一体に形成される引出式の扉５ａによって開閉され、冷蔵室３よりも高温に維持して野菜等の貯蔵物を冷蔵保存する。   The freezer compartment 4 is opened and closed by a drawer-type door 4a formed integrally with the storage case 4b, and stores stored items in a frozen state. The vegetable compartment 5 is opened and closed by a drawer-type door 5a formed integrally with the storage case 5b, and is stored at a temperature higher than that of the refrigerator compartment 3 to store stored items such as vegetables in a refrigerator.

冷凍室４及び冷蔵室３の背面にはダンパ１５を介して連通する冷気通路７（第１冷気通路）及び冷気通路８（第２冷気通路）が設けられる。冷気通路７には冷却器１１及び冷凍室送風機１２（第１送風機）が配され、冷凍室４に臨む吐出口７ａ（第１吐出口）が開口する。冷気通路８の上部には冷蔵区画２１に臨む吐出口８ａ（第２吐出口）が開口する。   A cold air passage 7 (first cold air passage) and a cold air passage 8 (second cold air passage) communicating with each other via a damper 15 are provided on the rear surfaces of the freezer compartment 4 and the refrigerator compartment 3. A cooler 11 and a freezer compartment fan 12 (first fan) are arranged in the cold air passage 7, and a discharge port 7 a (first discharge port) facing the freezer chamber 4 is opened. A discharge port 8 a (second discharge port) that faces the refrigeration section 21 is opened above the cold air passage 8.

また、低温区画２２に臨む吐出口９ａ（第３吐出口）を開口した冷気通路９が冷気通路８から分岐して設けられる。冷気通路９には冷蔵室送風機１３（第２送風機）が配される。冷蔵室送風機１３は吸気側を低温区画２２に向けて吐出口９ａに面して配置される。   Further, a cold air passage 9 having a discharge port 9 a (third discharge port) facing the low temperature section 22 is provided to be branched from the cold air passage 8. A refrigerator compartment fan 13 (second fan) is disposed in the cold air passage 9. The refrigerator compartment blower 13 is disposed facing the discharge port 9a with the intake side facing the low temperature section 22.

冷凍室４には冷気を冷気通路７に戻す戻り口７ｂが冷却器１１に面して設けられる。冷蔵室３には流出口１０ａを介して野菜室５に連通する連通路１０が導出され、連通路１０の一端に野菜室５に臨む吐出口１０ｂが形成される。また、野菜室５には冷気を冷気通路７に戻す戻り口（不図示）が設けられる。   The freezing chamber 4 is provided with a return port 7 b that returns the cool air to the cool air passage 7 so as to face the cooler 11. In the refrigerator compartment 3, a communication passage 10 communicating with the vegetable compartment 5 is led out through the outlet 10 a, and a discharge port 10 b facing the vegetable compartment 5 is formed at one end of the communication passage 10. The vegetable compartment 5 is provided with a return port (not shown) for returning cold air to the cold air passage 7.

野菜室５の後方には機械室６が設けられ、機械室６内には冷凍サイクルを運転する圧縮機１６が設置される。圧縮機１６には冷媒が流通する冷媒管（不図示）を介して凝縮器（不図示）、キャピラリチューブ（不図示）、冷却器１１が順に接続され、圧縮機１６に戻る。これにより、冷凍サイクルが運転され、冷却器１１が冷気通路７を流通する空気と熱交換して冷気が生成される。   A machine room 6 is provided behind the vegetable room 5, and a compressor 16 for operating a refrigeration cycle is installed in the machine room 6. A condenser (not shown), a capillary tube (not shown), and a cooler 11 are sequentially connected to the compressor 16 via a refrigerant pipe (not shown) through which the refrigerant flows, and the compressor 16 returns to the compressor 16. As a result, the refrigeration cycle is operated, and the cooler 11 exchanges heat with the air flowing through the cold air passage 7 to generate cold air.

ダンパ１５を閉じて圧縮機１６及び冷凍室送風機１２を駆動すると、矢印Ａ１に示すように冷気通路７を流通する冷気が吐出口７ａを介して冷凍室４に吐出される。これにより、冷凍室４が冷却され、冷凍室４を流通した冷気は戻り口７ｂを介して冷気通路７に戻る。   When the damper 15 is closed and the compressor 16 and the freezer compartment fan 12 are driven, the cold air flowing through the cold air passage 7 is discharged into the freezer compartment 4 through the discharge port 7a as shown by an arrow A1. As a result, the freezer compartment 4 is cooled, and the cold air flowing through the freezer compartment 4 returns to the cold air passage 7 via the return port 7b.

圧縮機１６及び冷凍室送風機１２の駆動中にダンパ１５が開かれると、冷気通路７から冷気通路８に冷気が流入する。冷蔵室送風機１３を停止した状態では矢印Ａ２に示すように冷気通路８を流通する冷気は吐出口８ａを介して冷蔵区画２１に吐出される。また、矢印Ａ３に示すように冷気通路９を流通する冷気は吐出口９ａを介して低温区画２２に吐出される。これにより、冷蔵室３が冷却される。   When the damper 15 is opened while the compressor 16 and the freezer compartment fan 12 are being driven, cold air flows from the cold air passage 7 into the cold air passage 8. In the state where the refrigerator compartment fan 13 is stopped, the cold air flowing through the cold air passage 8 is discharged to the refrigerator compartment 21 through the discharge port 8a as shown by an arrow A2. Further, as shown by the arrow A3, the cold air flowing through the cold air passage 9 is discharged to the low temperature section 22 through the discharge port 9a. Thereby, the refrigerator compartment 3 is cooled.

冷蔵室３を流通した冷気は連通路１０を介して野菜室５に導かれ、野菜室５が冷却される。野菜室５を流通した冷気は戻り口を介して冷気通路７に戻る。この時、冷蔵室送風機１３を駆動すると、冷気通路９から低温区画２２への冷気の流入が抑制される。   The cold air that has circulated through the refrigerator compartment 3 is guided to the vegetable compartment 5 through the communication passage 10, and the vegetable compartment 5 is cooled. The cold air flowing through the vegetable compartment 5 returns to the cold air passage 7 through the return port. At this time, when the refrigerator compartment fan 13 is driven, the inflow of cold air from the cold air passage 9 to the low temperature section 22 is suppressed.

また、ダンパ１５を閉じて冷蔵室送風機１３を駆動すると、矢印Ａ４に示すように吐出口９ａを介して低温区画２２から冷気が流出する。低温区画２２から流出した冷気は吐出口８ａから冷蔵区画２１に吐出され、冷蔵区画２１を流通してカバー２２ａと壁面との隙間を介して低温区画２２に戻る。これにより、冷蔵室３内を冷気が循環する。   Further, when the damper 15 is closed and the refrigerator compartment fan 13 is driven, cold air flows out from the low temperature section 22 through the discharge port 9a as indicated by an arrow A4. The cold air flowing out from the low temperature compartment 22 is discharged from the discharge port 8a to the refrigeration compartment 21, flows through the refrigeration compartment 21, and returns to the low temperature compartment 22 through the gap between the cover 22a and the wall surface. Thereby, cold air circulates in the refrigerator compartment 3.

図３は冷蔵庫１の構成を示すブロック図である。冷蔵庫１は各部を制御する制御部３０を有している。制御部３０には圧縮機１６、冷凍室送風機１２、冷蔵室送風機１３、ダンパ１５、操作パネル３１、冷凍室温度センサ３２、冷蔵室温度センサ３３、記憶部３４が接続される。   FIG. 3 is a block diagram showing the configuration of the refrigerator 1. The refrigerator 1 has a control unit 30 that controls each unit. The control unit 30 is connected to the compressor 16, the freezer compartment fan 12, the refrigerator compartment fan 13, the damper 15, the operation panel 31, the freezer compartment temperature sensor 32, the refrigerator compartment temperature sensor 33, and the storage unit 34.

操作パネル３１は扉３ａの前面に配され、後述する各冷却モード等の設定操作を行う。冷凍室温度センサ３２は冷凍室４の温度を検知し、冷蔵室温度センサ３３は冷蔵室３の冷蔵区画２１の温度を検知する。記憶部３４はＲＡＭ及びＲＯＭから成り、冷蔵庫１の動作プログラムを格納するとともに制御部３０による演算の一時記憶を行う。   The operation panel 31 is arranged on the front surface of the door 3a and performs setting operations such as each cooling mode described later. The freezer compartment temperature sensor 32 detects the temperature of the freezer compartment 4, and the refrigerator compartment temperature sensor 33 detects the temperature of the refrigerator compartment 21 of the refrigerator compartment 3. The storage unit 34 includes a RAM and a ROM, and stores an operation program of the refrigerator 1 and temporarily stores calculations by the control unit 30.

冷蔵庫１の動作プログラムには低温区画２２の設定温度の異なる第１冷却モード、第２冷却モード及び第３冷却モードが設けられる。第１冷却モードは氷点よりも高温の設定温度（本実施形態では２℃）であり、冷蔵区画２１の設定温度（本実施形態では３℃）の近傍の温度になっている。   The operation program of the refrigerator 1 is provided with a first cooling mode, a second cooling mode, and a third cooling mode that have different set temperatures of the low-temperature compartment 22. The first cooling mode is a set temperature higher than the freezing point (2 ° C. in the present embodiment), and is a temperature in the vicinity of the set temperature of the refrigeration section 21 (3 ° C. in the present embodiment).

第２冷却モードはチルド温度帯や氷温温度帯等の氷点近傍で第１冷却モードよりも低温の設定温度（本実施形態では−１℃）になっている。第３冷却モードは第２冷却モードよりも低温の設定温度（本実施形態では−５℃）になっている。操作パネル３１の操作によって貯蔵物に応じて各冷却モードを切り替えることにより、保存温度の異なる貯蔵物を貯蔵物に応じた温度で低温区画２２に貯蔵することができる。   In the second cooling mode, the temperature is lower than the first cooling mode (−1 ° C. in the present embodiment) near the freezing point such as the chilled temperature zone and the ice temperature temperature zone. The third cooling mode is a set temperature (−5 ° C. in this embodiment) that is lower than that of the second cooling mode. By switching each cooling mode according to the stored item by operating the operation panel 31, it is possible to store the stored item having different preservation temperatures in the low temperature section 22 at a temperature corresponding to the stored item.

図４（ａ）〜（ｆ）は第１冷却モードの動作の一例を示すタイムチャートである。図４（ａ）の縦軸は冷蔵室３の温度を示している。図中、Ａは冷蔵区画２１の温度であり、Ｂは低温区画２２の温度である。図４（ｂ）の縦軸は冷凍室４の温度を示している。図４（ｃ）の縦軸は圧縮機１６のオン状態とオフ状態とを示している。図４（ｄ）の縦軸は冷凍室送風機１２の回転数を示している。図４（ｅ）の縦軸はダンパ１５の開状態と閉状態とを示している。図４（ｆ）の縦軸は冷蔵室送風機１３の回転数を示している。   4A to 4F are time charts showing an example of the operation in the first cooling mode. The vertical axis | shaft of Fig.4 (a) has shown the temperature of the refrigerator compartment 3. FIG. In the figure, A is the temperature of the refrigerated compartment 21 and B is the temperature of the cold compartment 22. The vertical axis in FIG. 4B indicates the temperature of the freezer compartment 4. The vertical axis in FIG. 4C indicates the on state and the off state of the compressor 16. The vertical axis | shaft of FIG.4 (d) has shown the rotation speed of the freezer compartment fan 12. FIG. The vertical axis in FIG. 4 (e) indicates the open state and the closed state of the damper 15. The vertical axis | shaft of FIG.4 (f) has shown the rotation speed of the refrigerator compartment fan 13. FIG.

第１冷却モードでは圧縮機１６を停止してダンパ１５が閉じられた時に冷蔵室送風機１３が所定の回転数Ｎ２で駆動される。これにより、吐出口９ａを介して低温区画２２から冷気が流出し（図１の矢印Ａ４）、低温区画２２から流出した冷気が吐出口８ａから冷蔵区画２１に吐出されて冷蔵室３内を循環する。   In the first cooling mode, when the compressor 16 is stopped and the damper 15 is closed, the refrigerator compartment fan 13 is driven at a predetermined rotational speed N2. Thereby, cold air flows out from the low temperature compartment 22 through the discharge port 9a (arrow A4 in FIG. 1), and the cold air flowing out from the low temperature compartment 22 is discharged from the discharge port 8a to the refrigeration compartment 21 and circulates in the refrigerator compartment 3. To do.

時間ｔ１で冷凍室４が所定の上限温度Ｔｆ２よりも高温になると、圧縮機１６が駆動されるとともに冷凍室送風機１２が所定の回転数Ｎａで駆動される。この時、同図に示すように冷蔵区画２１が所定の上限温度Ｔｒ２よりも高温であると、ダンパ１５が開かれる。冷蔵区画２１が上限温度Ｔｒ２よりも低温の場合はダンパ１５を閉じた状態を維持し、上限温度Ｔｒ２よりも高温になるとダンパ１５が開かれる。ダンパ１５が開かれると、冷蔵室送風機１３が回転数Ｎ２よりも低い回転数Ｎ１で駆動される。   When the freezer compartment 4 becomes hotter than the predetermined upper limit temperature Tf2 at time t1, the compressor 16 is driven and the freezer compartment fan 12 is driven at a predetermined rotational speed Na. At this time, as shown in the figure, when the refrigeration section 21 is hotter than the predetermined upper limit temperature Tr2, the damper 15 is opened. When the refrigerator compartment 21 is lower than the upper limit temperature Tr2, the damper 15 is kept closed, and when the temperature is higher than the upper limit temperature Tr2, the damper 15 is opened. When the damper 15 is opened, the refrigerator compartment fan 13 is driven at a rotational speed N1 lower than the rotational speed N2.

これにより、冷気通路７を流通する冷気が吐出口７ａを介して冷凍室４に吐出され、冷凍室４が冷却される。冷気通路８を流通する冷気は吐出口８ａを介して冷蔵区画２１に吐出され、冷蔵室３及び野菜室５が冷却される。   Thereby, the cold air which distribute | circulates the cold air | gas channel | path 7 is discharged to the freezer compartment 4 via the discharge outlet 7a, and the freezer compartment 4 is cooled. The cold air flowing through the cold air passage 8 is discharged to the refrigerating section 21 through the discharge port 8a, and the refrigerating room 3 and the vegetable room 5 are cooled.

また、冷蔵室送風機１３の駆動によって低温区画２２には吐出口９ａを介して吸引力が働くため、冷気通路９から低温区画２２への冷気流入が抑制される。回転数Ｎ１が大きすぎると、冷気通路９内を冷気が逆流して冷却器１１からの冷気が吐出口８ａに供給されない。このため、本実施形態では冷蔵室送風機１３が回転数Ｎ１の時に低温区画２２に対する冷気の流入が殆ど発生せず、冷気通路９を逆流しない状態になっている。   Further, since the suction force acts on the low temperature section 22 through the discharge port 9a by driving the refrigerator compartment fan 13, the inflow of cold air from the cold air passage 9 to the low temperature section 22 is suppressed. If the rotational speed N1 is too large, the cool air flows backward in the cool air passage 9, and the cool air from the cooler 11 is not supplied to the discharge port 8a. For this reason, in this embodiment, when the refrigerating room blower 13 is at the rotation speed N1, almost no inflow of cool air into the low temperature section 22 occurs, and the cool air passage 9 does not flow backward.

時間ｔ２で冷蔵区画２１が所定の下限温度Ｔｒ１に到達すると、ダンパ１５を閉じて冷蔵室送風機１３が回転数Ｎ２に切り替えられる。時間ｔ３で冷凍室４が所定の下限温度Ｔｆ１に到達すると、圧縮機１６及び冷凍室送風機１２が停止される。   When the refrigeration section 21 reaches a predetermined lower limit temperature Tr1 at time t2, the damper 15 is closed and the refrigeration room blower 13 is switched to the rotation speed N2. When the freezer compartment 4 reaches a predetermined lower limit temperature Tf1 at time t3, the compressor 16 and the freezer compartment fan 12 are stopped.

ダンパ１５を閉じた際に冷蔵室送風機１３を回転数Ｎ２で駆動して冷蔵室３内を冷気が循環するため、低温区画２２が昇温されて冷蔵区画２１の温度に近づけられる。この時、低温区画２２は隣接する冷凍室４の冷熱が供給されるため、冷蔵区画２１よりも低温になっている。   When the damper 15 is closed, the refrigerating room blower 13 is driven at the rotation speed N2 so that the cold air circulates in the refrigerating room 3. At this time, the cold compartment 22 is supplied with cold heat from the adjacent freezer compartment 4, and thus is colder than the refrigerator compartment 21.

図５（ａ）〜（ｆ）は第２冷却モードの動作の一例を示すタイムチャートである。前述の図４と同様に、図５（ａ）の縦軸は冷蔵室３の温度を示している。図中、Ａは冷蔵区画２１の温度であり、Ｂは低温区画２２の温度である。図５（ｂ）の縦軸は冷凍室４の温度を示している。図５（ｃ）の縦軸は圧縮機１６のオン状態とオフ状態とを示している。図５（ｄ）の縦軸は冷凍室送風機１２の回転数を示している。図５（ｅ）の縦軸はダンパ１５の開状態と閉状態とを示している。図５（ｆ）の縦軸は冷蔵室送風機１３の回転数を示している。   FIGS. 5A to 5F are time charts showing an example of the operation in the second cooling mode. Similar to FIG. 4 described above, the vertical axis of FIG. 5A indicates the temperature of the refrigerator compartment 3. In the figure, A is the temperature of the refrigerated compartment 21 and B is the temperature of the cold compartment 22. The vertical axis in FIG. 5B indicates the temperature of the freezer compartment 4. The vertical axis in FIG. 5C indicates the on state and the off state of the compressor 16. The vertical axis | shaft of FIG.5 (d) has shown the rotation speed of the freezer compartment fan 12. FIG. The vertical axis in FIG. 5 (e) indicates the open state and the closed state of the damper 15. The vertical axis | shaft of FIG.5 (f) has shown the rotation speed of the refrigerator compartment fan 13. FIG.

第２冷却モードでは圧縮機１６を停止してダンパ１５が閉じられた時に冷蔵室送風機１３が回転数Ｎ２よりも低い回転数Ｎ１で駆動される。   In the second cooling mode, when the compressor 16 is stopped and the damper 15 is closed, the refrigerating room blower 13 is driven at a rotational speed N1 lower than the rotational speed N2.

第１冷却モードと同様に時間ｔ１で冷凍室４が上限温度Ｔｆ２よりも高温になると、圧縮機１６が駆動されるとともに冷凍室送風機１２が回転数Ｎａで駆動される。この時、冷蔵区画２１が上限温度Ｔｒ２よりも高温であると、ダンパ１５が開かれる。ダンパ１５を開いた際に冷蔵室送風機１３は回転数Ｎ１を維持して駆動される。   When the freezer compartment 4 becomes higher than the upper limit temperature Tf2 at time t1 as in the first cooling mode, the compressor 16 is driven and the freezer blower 12 is driven at the rotation speed Na. At this time, if the refrigerated compartment 21 is hotter than the upper limit temperature Tr2, the damper 15 is opened. When the damper 15 is opened, the refrigerator compartment fan 13 is driven while maintaining the rotation speed N1.

これにより、冷気通路７を流通する冷気が吐出口７ａを介して冷凍室４に吐出され、冷凍室４が冷却される。冷気通路８を流通する冷気は吐出口８ａを介して冷蔵区画２１に吐出され、冷蔵室３及び野菜室５が冷却される。また、冷蔵室送風機１３を回転数Ｎ１で駆動するため、冷気通路９から低温区画２２への冷気流入が抑制される。   Thereby, the cold air which distribute | circulates the cold air | gas channel | path 7 is discharged to the freezer compartment 4 via the discharge outlet 7a, and the freezer compartment 4 is cooled. The cold air flowing through the cold air passage 8 is discharged to the refrigerating section 21 through the discharge port 8a, and the refrigerating room 3 and the vegetable room 5 are cooled. Moreover, since the refrigerator compartment fan 13 is driven at the rotation speed N1, the inflow of cold air from the cold air passage 9 to the low temperature section 22 is suppressed.

時間ｔ２で冷蔵区画２１が下限温度Ｔｒ１に到達すると、ダンパ１５が閉じられる。時間ｔ３で冷凍室４が下限温度Ｔｆ１に到達すると、圧縮機１６及び冷凍室送風機１２が停止される。   When the refrigeration section 21 reaches the lower limit temperature Tr1 at time t2, the damper 15 is closed. When the freezer compartment 4 reaches the lower limit temperature Tf1 at time t3, the compressor 16 and the freezer compartment blower 12 are stopped.

低温区画２２は冷蔵室３の底部に配されるため冷気の自重によって前方から比較的低温の冷気が流入するとともに、隣接する冷凍室４の冷熱が供給される。また、ダンパ１５を閉じた際に冷蔵室送風機１３を低速（回転数Ｎ１）で駆動するため、冷蔵室３内を冷気が緩やかに循環する。このため、低温区画２２の昇温が抑制され、低温区画２２が第１冷却モードよりも低温に維持される。   Since the low-temperature compartment 22 is arranged at the bottom of the refrigerator compartment 3, cool air of relatively low temperature flows from the front due to the weight of the cold air, and cold heat of the adjacent freezer compartment 4 is supplied. Further, when the damper 15 is closed, the refrigerator compartment fan 13 is driven at a low speed (the number of revolutions N1), so that the cool air circulates gently in the refrigerator compartment 3. For this reason, the temperature rise of the low temperature section 22 is suppressed, and the low temperature section 22 is maintained at a lower temperature than in the first cooling mode.

尚、第２冷却モードで低温区画２２をより低温に維持するために、ダンパ１５を閉じた際に冷蔵室送風機１３を停止（回転数＝０）してもよい。   In order to maintain the low temperature section 22 at a lower temperature in the second cooling mode, the refrigerating room blower 13 may be stopped (rotation number = 0) when the damper 15 is closed.

尚、第１冷却モードの冷蔵室送風機１３の回転数Ｎ１と第２冷却モードの冷蔵室送風機１３の回転数Ｎ１とを異なる回転数にしてもよい。また、冷蔵室送風機１３の回転数を可変しているが、冷蔵室送風機１３の風量を可変すればよく、一定の回転数でＤＵＴＹ比を可変してもよい。   The rotation speed N1 of the refrigerator compartment fan 13 in the first cooling mode may be different from the rotation speed N1 of the refrigerator compartment fan 13 in the second cooling mode. Moreover, although the rotation speed of the refrigerator compartment fan 13 is varied, the air volume of the refrigerator compartment fan 13 may be varied, and the DUTY ratio may be varied at a constant revolution number.

図６（ａ）〜（ｆ）は第３冷却モードの動作の一例を示すタイムチャートである。前述の図４と同様に、図６（ａ）の縦軸は冷蔵室３の冷蔵区画２１の温度を示している。図６（ｂ）の縦軸は冷凍室４の温度を示している。図６（ｃ）の縦軸は圧縮機１６のオン状態とオフ状態とを示している。図６（ｄ）の縦軸は冷凍室送風機１２の回転数を示している。図６（ｅ）の縦軸はダンパ１５の開状態と閉状態とを示している。図６（ｆ）の縦軸は冷蔵室送風機１３の回転数を示している。   6A to 6F are time charts showing an example of the operation in the third cooling mode. Similar to FIG. 4 described above, the vertical axis of FIG. 6A indicates the temperature of the refrigeration compartment 21 of the refrigerator compartment 3. The vertical axis of FIG. 6B indicates the temperature of the freezer compartment 4. The vertical axis in FIG. 6C indicates the on state and the off state of the compressor 16. The vertical axis | shaft of FIG.6 (d) has shown the rotation speed of the freezer compartment fan 12. FIG. The vertical axis in FIG. 6 (e) shows the open state and the closed state of the damper 15. The vertical axis | shaft of FIG.6 (f) has shown the rotation speed of the refrigerator compartment fan 13. FIG.

第３冷却モードでは圧縮機１６を停止してダンパ１５が閉じられた時に冷蔵室送風機１３が停止される。   In the third cooling mode, the refrigerator 16 is stopped when the compressor 16 is stopped and the damper 15 is closed.

時間ｔ１で冷凍室４が上限温度Ｔｆ２よりも高温になると、圧縮機１６が駆動されるとともに冷凍室送風機１２が回転数Ｎａで駆動される。この時、同図に示すように冷蔵区画２１が上限温度Ｔｒ２よりも高温であると、ダンパ１５が開かれる。ダンパ１５を開いた際に冷蔵室送風機１３は停止状態を継続する。   When the freezer compartment 4 becomes higher than the upper limit temperature Tf2 at time t1, the compressor 16 is driven and the freezer compartment fan 12 is driven at the rotation speed Na. At this time, as shown in the figure, when the refrigeration section 21 has a temperature higher than the upper limit temperature Tr2, the damper 15 is opened. When the damper 15 is opened, the refrigerator compartment fan 13 continues to be stopped.

これにより、冷気通路７を流通する冷気が吐出口７ａを介して冷凍室４に吐出され、冷凍室４が冷却される。また、冷気通路８、９を流通する冷気が吐出口８ａ、９ａを介して冷蔵室３に吐出され、冷蔵室３及び野菜室５が冷却される。   Thereby, the cold air which distribute | circulates the cold air | gas channel | path 7 is discharged to the freezer compartment 4 via the discharge outlet 7a, and the freezer compartment 4 is cooled. Moreover, the cold air which distribute | circulates the cold air | gas channel | paths 8 and 9 is discharged to the refrigerator compartment 3 via the discharge outlets 8a and 9a, and the refrigerator compartment 3 and the vegetable compartment 5 are cooled.

この時、低温区画２２は冷却器１１に近いため冷蔵区画２１よりも低温の冷気が吐出される。また、低温区画２２は冷蔵室３の底部に配されるため冷気の自重によって前方から低温の冷気が流入するとともに、隣接する冷凍室４の冷熱が供給される。これにより、低温区画２２が氷点よりも低温で第２冷却モードよりも低温に維持される。   At this time, since the low temperature section 22 is close to the cooler 11, cold air having a temperature lower than that of the refrigerated section 21 is discharged. Further, since the low temperature compartment 22 is arranged at the bottom of the refrigerator compartment 3, low temperature cold air flows in from the front due to the weight of the cold air, and the cold heat of the adjacent freezer compartment 4 is supplied. Thereby, the low temperature section 22 is maintained at a temperature lower than the freezing point and lower than the second cooling mode.

時間ｔ２で冷蔵区画２１が下限温度Ｔｒ１に到達すると、ダンパ１５が閉じられる。時間ｔ３で冷凍室４が下限温度Ｔｆ１に到達すると、圧縮機１６及び冷凍室送風機１２が停止される。   When the refrigeration section 21 reaches the lower limit temperature Tr1 at time t2, the damper 15 is closed. When the freezer compartment 4 reaches the lower limit temperature Tf1 at time t3, the compressor 16 and the freezer compartment blower 12 are stopped.

本実施形態によると、冷気通路７（第１冷気通路）と冷気通路８（第２冷気通路）とがダンパ１５を介して連通し、冷凍室４に臨む吐出口７ａ（第１吐出口）及び冷蔵区画２１に臨む吐出口８ａ（第２吐出口）がそれぞれ冷気通路７、８に設けられる。冷気通路８から分岐する冷気通路９（第３冷気通路）には低温区画２２に臨む吐出口９ａ（第３吐出口）が設けられ、冷蔵室送風機１３（第２送風機）が吸気側を低温区画２２に向けて配される。   According to this embodiment, the cold air passage 7 (first cold air passage) and the cold air passage 8 (second cold air passage) communicate with each other via the damper 15, and the discharge port 7 a (first discharge port) facing the freezer compartment 4, and Discharge ports 8a (second discharge ports) facing the refrigerated compartment 21 are provided in the cold air passages 7 and 8, respectively. The cold air passage 9 (third cold air passage) branched from the cold air passage 8 is provided with a discharge port 9a (third discharge port) facing the low-temperature compartment 22, and the refrigerator compartment blower 13 (second blower) has a low-temperature compartment on the intake side. It is arranged toward 22.

また、第１冷却モードと第２冷却モードとはダンパ１５を閉じた際の冷蔵室送風機１３の駆動状態が異なる。第２冷却モードでダンパ１５を閉じて冷蔵室送風機１３を停止した場合は、第１冷却モードと冷蔵室送風機１３の駆動状態が異なる。第１冷却モードまたは第２冷却モードと第３冷却モードとはダンパ１５を閉じた際及び開いた際の冷蔵室送風機１３の駆動状態が異なる。   The first cooling mode and the second cooling mode differ in the driving state of the refrigerator compartment blower 13 when the damper 15 is closed. When the damper 15 is closed in the second cooling mode and the refrigerator compartment fan 13 is stopped, the driving state of the first cooling mode and the refrigerator compartment fan 13 are different. The driving state of the refrigerator compartment fan 13 when the damper 15 is closed and when the damper 15 is opened differs between the first cooling mode or the second cooling mode and the third cooling mode.

従って、ダンパ１５を閉じた際または開いた際の冷蔵室送風機１３の駆動状態が低温区画２２の設定温度に応じて可変される。これにより、簡単な構成で低温区画２２を複数の設定温度に切り替えることができ、貯蔵スペースを有効利用できるため冷蔵庫１の利便性を向上することができる。   Therefore, the driving state of the refrigerator compartment fan 13 when the damper 15 is closed or opened is varied according to the set temperature of the low temperature section 22. Thereby, the low temperature compartment 22 can be switched to a plurality of set temperatures with a simple configuration, and the storage space can be used effectively, so the convenience of the refrigerator 1 can be improved.

また、第１冷却モードはダンパ１５を閉じた際に冷蔵室送風機１３を所定風量（回転数Ｎ２）で駆動し、ダンパ１５を開いた際に冷蔵室送風機１３を該所定風量よりも低い風量（回転数Ｎ１）で駆動する。第２冷却モードはダンパ１５を閉じた際に冷蔵室送風機１３を該所定風量よりも低い風量（回転数Ｎ１）で駆動または停止する。第３冷却モードはダンパ１５を閉じた及び開いた際に冷蔵室送風機１３を停止する。このため、第１冷却モード、第２冷却モード及び第３冷却モードによって低温区画２２の温度を容易に変更することができる。   In the first cooling mode, when the damper 15 is closed, the refrigerator compartment fan 13 is driven with a predetermined air volume (rotation speed N2), and when the damper 15 is opened, the refrigerator compartment fan 13 is operated with an air volume lower than the predetermined air volume ( It is driven at the rotational speed N1). In the second cooling mode, when the damper 15 is closed, the refrigerating room blower 13 is driven or stopped at an air volume (rotation speed N1) lower than the predetermined air volume. In the third cooling mode, the refrigerator fan 13 is stopped when the damper 15 is closed and opened. For this reason, the temperature of the low temperature section 22 can be easily changed by the first cooling mode, the second cooling mode, and the third cooling mode.

＜第２実施形態＞
次に、第２実施形態について説明する。本実施形態は第１冷却モード及び第２冷却モードの動作が第１実施形態と異なっている。その他の部分は第１実施形態と同一である。 Second Embodiment
Next, a second embodiment will be described. This embodiment differs from the first embodiment in the operations of the first cooling mode and the second cooling mode. Other parts are the same as those of the first embodiment.

図７（ａ）、図７（ｂ）は本実施形態の第１冷却モードの動作の一例を示すタイムチャートである。図８（ａ）、図８（ｂ）は本実施形態の第２冷却モードの動作の一例を示すタイムチャートである。図７（ａ）及び図８（ａ）の縦軸はダンパ１５の開状態と閉状態とを示している。図７（ｂ）及び図８（ｂ）の縦軸は冷蔵室送風機１３の回転数を示している。尚、圧縮機１６、冷凍室送風機１２の動作は図４、図５と同様である。   FIG. 7A and FIG. 7B are time charts showing an example of the operation in the first cooling mode of the present embodiment. FIG. 8A and FIG. 8B are time charts showing an example of the operation in the second cooling mode of the present embodiment. The vertical axes in FIGS. 7A and 8A indicate the open state and the closed state of the damper 15. The vertical axis | shaft of FIG.7 (b) and FIG.8 (b) has shown the rotation speed of the refrigerator compartment fan 13. FIG. The operations of the compressor 16 and the freezer compartment fan 12 are the same as those shown in FIGS.

第１冷却モード時及び第２冷却モード時に冷蔵室３の温度が所定の温度より低くなり、ダンパ１５を閉じた直後は低温区画２２よりも冷蔵区画２１の方が低温になる場合がある。この時、冷蔵室送風機１３が駆動されると、冷蔵区画２１が低温であるため低温区画２２が過冷却される。   In the first cooling mode and the second cooling mode, the temperature of the refrigerating chamber 3 becomes lower than a predetermined temperature, and the refrigerating section 21 may be cooler than the low-temperature section 22 immediately after the damper 15 is closed. At this time, when the refrigerator compartment fan 13 is driven, the cold compartment 22 is supercooled because the cold compartment 21 is at a low temperature.

このため、第１冷却モードでは時間ｔ２でダンパ１５が閉じられると、冷蔵室送風機１３を一旦停止して所定の遅延期間Ｔａが経過した後に冷蔵室送風機１３が回転数Ｎ２で駆動される。   For this reason, in the first cooling mode, when the damper 15 is closed at time t2, the refrigerator compartment fan 13 is temporarily stopped and the refrigerator compartment fan 13 is driven at the rotation speed N2 after a predetermined delay period Ta has elapsed.

また、第２冷却モードでは時間ｔ２でダンパ１５が閉じられると、冷蔵室送風機１３を一旦停止して所定の遅延期間Ｔａが経過した後に冷蔵室送風機１３が回転数Ｎ２で駆動される。そして、所定時間が経過した後に冷蔵室送風機１３が回転数Ｎ１で駆動される。   In the second cooling mode, when the damper 15 is closed at time t2, the refrigerating room blower 13 is temporarily stopped and the refrigerating room blower 13 is driven at the rotation speed N2 after a predetermined delay period Ta has elapsed. And after predetermined time passes, the refrigerator compartment air blower 13 is driven with the rotation speed N1.

これにより、冷蔵室３内を温まった冷気が循環して冷蔵室３の底部が昇温され、低温区画２２の過冷却を防止することができる。尚、第２冷却モードの遅延期間Ｔａで冷蔵室送風機１３を低回転（回転数Ｎ１）で駆動してもよいが、高回転（回転数Ｎ２）にした方が迅速に冷蔵室３の底部を昇温できるのでより望ましい。   Thereby, the cold air which warmed the inside of the refrigerator compartment 3 circulates, the bottom part of the refrigerator compartment 3 is heated up, and the overcooling of the low temperature division 22 can be prevented. The refrigerator fan 13 may be driven at a low rotation speed (rotation speed N1) during the delay period Ta in the second cooling mode, but the bottom of the refrigerator compartment 3 can be quickly moved at a high rotation speed (rotation speed N2). It is more desirable because it can raise the temperature.

本実施形態では遅延期間Ｔａを所定の時間に設定している。ダンパ１５を閉じてから冷蔵区画２１が上限温度Ｔｒ２（ダンパ１５を開く温度）よりも低温の所定温度に昇温されるまでを遅延期間Ｔａにしてもよい。これにより、低温区画２２を昇温できない期間での冷蔵室送風機１３の高速回転をより確実に防止できる。   In this embodiment, the delay period Ta is set to a predetermined time. The delay period Ta may be from when the damper 15 is closed until the refrigerated compartment 21 is heated to a predetermined temperature lower than the upper limit temperature Tr2 (temperature at which the damper 15 is opened). Thereby, the high-speed rotation of the refrigerator compartment fan 13 in the period which cannot heat up the low temperature division 22 can be prevented more reliably.

＜第３実施形態＞
次に、第３実施形態について説明する。本実施形態は第１冷却モード及び第２冷却モードの動作が第１実施形態と異なっている。その他の部分は第１実施形態と同一である。 <Third Embodiment>
Next, a third embodiment will be described. This embodiment differs from the first embodiment in the operations of the first cooling mode and the second cooling mode. Other parts are the same as those of the first embodiment.

第１冷却モード及び第２冷却モード時に外気温が高く高温の貯蔵物が投入された場合に、ダンパ１５を開いて冷蔵室３内に冷気が供給される状態が長時間継続する。これにより、冷気侵入を制限される低温区画２２が冷気通路８の下部を流通する低温の冷気の冷熱によって所望の温度に対して過冷却される。   In the first cooling mode and the second cooling mode, when a high-temperature stored item is thrown in, the state where the damper 15 is opened and the cold air is supplied into the refrigerator compartment 3 continues for a long time. As a result, the low-temperature section 22 restricted from entering the cold air is supercooled to a desired temperature by the cold heat of the low-temperature cold air flowing through the lower part of the cold air passage 8.

このため、ダンパ１５を開いた状態が所定時間（例えば、５０分）継続して冷蔵区画２１が所定の強制循環温度よりも低温の場合に、所定時間（例えば、１０分）ダンパ１５を閉じて冷蔵室送風機１３が高回転（回転数Ｎ２）で駆動される。強制循環温度は冷蔵室３の下限温度Ｔｒ１（ダンパ１５を閉じる温度）に対して高温に設定される。これにより、冷蔵室３内を冷気が循環して低温区画２２が昇温され、低温区画２２の過冷却を防止することができる。   Therefore, when the damper 15 is kept open for a predetermined time (for example, 50 minutes) and the refrigeration section 21 is lower than the predetermined forced circulation temperature, the damper 15 is closed for a predetermined time (for example, 10 minutes). The refrigerator compartment fan 13 is driven at a high speed (rotation speed N2). The forced circulation temperature is set to be higher than the lower limit temperature Tr1 (temperature at which the damper 15 is closed) of the refrigerator compartment 3. Thereby, the cold air circulates in the refrigerator compartment 3 to raise the temperature of the low temperature section 22, and overcooling of the low temperature section 22 can be prevented.

冷蔵区画２１が強制循環温度よりも高温の場合は、低温区画２２が過冷却になるまでに余裕があると考えられる。このため、ダンパ１５を開いた状態を継続して冷蔵室３内が急速に冷却される。   If the refrigerated compartment 21 is hotter than the forced circulation temperature, it is considered that there is room before the low-temperature compartment 22 becomes supercooled. For this reason, the state which opened the damper 15 is continued, and the inside of the refrigerator compartment 3 is cooled rapidly.

尚、冷蔵室送風機１３を低回転（回転数Ｎ１）で駆動してもよいが、高回転にした方が迅速に低温区画２２を昇温できるのでより望ましい。   Although the refrigerator fan 13 may be driven at a low rotation speed (rotation speed N1), it is more desirable to increase the rotation speed at a high speed because the low-temperature compartment 22 can be quickly heated.

本発明によると、冷蔵室内に低温区画を設けた冷蔵庫に利用することができる。   According to this invention, it can utilize for the refrigerator which provided the low temperature division in the refrigerator compartment.

１ 冷蔵庫
２ 断熱箱体
３ 冷蔵室
３ａ、４ａ、５ａ 扉
３ｂ 載置棚
３ｃ 縦仕切壁
４ 冷凍室
４ｂ、５ｂ 収納ケース
５ 野菜室
６ 機械室
７、８、９ 冷気通路
７ａ、８ａ、９ａ、１０ｂ 吐出口
７ｂ 戻り口
１０ 連通路
１０ａ 流出口
１１ 冷却器
１２ 冷凍室送風機
１３ 冷蔵室送風機
１５ ダンパ
１６ 圧縮機
１７、１８ 断熱壁
２１ 冷蔵区画
２２ 低温区画
３０ 制御部
３１ 操作パネル
３２ 冷凍室温度センサ
３３ 冷蔵室温度センサ
３４ 記憶部 DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Heat insulation box 3 Refrigerating room 3a, 4a, 5a Door 3b Mounting shelf 3c Vertical partition wall 4 Freezing room 4b, 5b Storage case 5 Vegetable room 6 Machine room 7, 8, 9 Cold air passage 7a, 8a, 9a, DESCRIPTION OF SYMBOLS 10b Discharge port 7b Return port 10 Communication path 10a Outlet 11 Cooler 12 Freezer compartment blower 13 Refrigerator compartment blower 15 Damper 16 Compressor 17, 18 Heat insulation wall 21 Refrigeration compartment 22 Low temperature compartment 30 Control part 31 Operation panel 32 Freezer compartment temperature sensor 33 Cold room temperature sensor 34 Storage unit

Claims (5)

貯蔵物を冷蔵保存する冷蔵区画と前記冷蔵区画よりも低温の低温区画とを有して前記低温区画を底部に配した冷蔵室と、前記冷蔵室の下方に隣接して貯蔵物を冷凍保存する冷凍室と、冷凍サイクルを運転する圧縮機と、前記圧縮機に接続して冷気を生成する冷却器と、前記冷却器が配されるとともに前記冷凍室に臨む第１吐出口を有する第１冷気通路と、前記第１冷気通路に連通して前記冷蔵区画に臨む第２吐出口を有する第２冷気通路と、前記第１冷気通路と前記第２冷気通路との間に設けられて開閉動作するダンパと、前記第２冷気通路から分岐して前記低温区画に臨む第３吐出口を有する第３冷気通路と、前記第１冷気通路に配される第１送風機と、前記第３冷気通路の前記第３吐出口に吸気側を向けて配される第２送風機とを備え、前記ダンパを開いた際または前記ダンパを閉じた際の前記第２送風機の駆動状態を前記低温区画の設定温度に応じて可変したことを特徴とする冷蔵庫。 A refrigerated compartment for refrigerated storage and a cold compartment having a temperature lower than that of the refrigerated compartment, the cold compartment disposed at the bottom, and the stock stored in a refrigerator adjacent to the lower part of the refrigerator compartment. A first cold air having a freezer compartment, a compressor operating a refrigeration cycle, a cooler connected to the compressor to generate cold air, and a first discharge port facing the freezer compartment, the cooler being disposed. and the passage is opened and closed is provided between the second cold air passage having a second discharge port facing the refrigerating compartment communicates with the first cold air passage, and the first cold air passage and the second cool air passage a damper, and a third cold air passage having a third discharge port facing the low temperature zone is branched from the second cold air passage, a first blower disposed in the first cold air passage, the said third cool air passage and a second blower disposed an intake side toward Ke third discharge port, Refrigerator, characterized in that the variable according to driving states of the second blower when closed or the damper when opened serial damper to the set temperature of the low temperature compartment. 貯蔵物を冷蔵保存する冷蔵区画と前記冷蔵区画よりも低温の低温区画とを有して前記低温区画を底部に配した冷蔵室と、前記冷蔵室の下方に隣接して貯蔵物を冷凍保存する冷凍室と、冷凍サイクルを運転する圧縮機と、前記圧縮機に接続して冷気を生成する冷却器と、前記冷却器が配されるとともに前記冷凍室に臨む第１吐出口を有する第１冷気通路と、ダンパを介して前記第１冷気通路に連通して前記冷蔵区画に臨む第２吐出口を有する第２冷気通路と、前記第２冷気通路から分岐して前記低温区画に臨む第３吐出口を有する第３冷気通路と、前記第１冷気通路に配される第１送風機と、前記第３冷気通路に吸気側を前記低温区画に向けて配される第２送風機とを備え、前記ダンパを開いた際または前記ダンパを閉じた際の前記第２送風機の駆動状態を前記低温区画の設定温度に応じて可変し、
前記ダンパを閉じた際に前記第２送風機を所定風量で駆動するとともに開いた際に前記第２送風機を前記所定風量よりも低い風量で駆動する第１冷却モードと、前記ダンパを閉じた際に前記第２送風機を前記所定風量よりも低い風量で駆動するとともに開いた際に第２送風機を前記所定風量よりも低い風量で駆動または停止する第２冷却モードとを備えたことを特徴とする冷蔵庫。 A refrigerated compartment for refrigerated storage and a cold compartment having a temperature lower than that of the refrigerated compartment, the cold compartment disposed at the bottom, and the stock stored in a refrigerator adjacent to the lower part of the refrigerator compartment. A first cold air having a freezer compartment, a compressor operating a refrigeration cycle, a cooler connected to the compressor to generate cold air, and a first discharge port facing the freezer compartment, the cooler being disposed. A second cold air passage having a second discharge port that communicates with the first cold air passage through the damper and faces the refrigeration compartment; and a third discharge that branches from the second cold air passage and faces the low temperature compartment A third cold air passage having an outlet; a first blower disposed in the first cold air passage; and a second blower disposed in the third cold air passage with an intake side directed toward the low-temperature compartment, the damper The second blower when the fan is opened or the damper is closed Variable and in accordance with the driving state to the set temperature of the low temperature compartment,
A first cooling mode in which the driven at a low air volume than the predetermined air volume of the second blower when opening to drive at a predetermined air volume of the second blower when closing the damper, when closing said damper you characterized in that a second cooling mode in which the driving or stopping the second fan at a low air volume than the predetermined air volume of the second blower when opening to drive at a low air volume than the predetermined air volume refrigerators. 前記第１冷却モード時に前記ダンパを閉じた時に前記第２送風機を停止し、所定の遅延期間が経過した後に前記第２送風機を前記所定風量に切り替えることを特徴とする請求項２に記載の冷蔵庫。 The refrigerator according to claim 2, characterized in that switching to the predetermined air volume of the second blower after the second blower is stopped, the predetermined delay period has elapsed when closing the damper in the first cooling mode . 前記第２冷却モード時に前記ダンパを閉じた時に前記第２送風機を停止し、所定の遅延期間が経過した後に前記第２送風機を前記所定風量で駆動し、所定時間経過後に前記所定風量よりも低い風量に切り替えることを特徴とする請求項２または請求項３に記載の冷蔵庫。 The second blower is stopped when closing the damper to the second cooling mode, and driven by the predetermined air volume of the second blower after a predetermined delay period has elapsed, the lower than the predetermined air volume after a predetermined time has elapsed The refrigerator according to claim 2 or 3, wherein the refrigerator is switched to an air volume. 前記第１冷却モード及び前記第２冷却モード時に前記ダンパを開いた状態が所定時間継続するとともに前記ダンパを閉じる温度に対して高温の所定温度よりも前記冷蔵区画が低温の場合に、前記ダンパを所定時間閉じて前記第２送風機を駆動したことを特徴とする請求項２または請求項３に記載の冷蔵庫。 If the state of opening the damper to the first cooling mode and the second cooling mode is the refrigerating compartment than the predetermined temperature of the hot against it closes the damper temperature continues for a predetermined time is low, the damper The refrigerator according to claim 2 or 3, wherein the second blower is driven after being closed for a predetermined time.

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