JP6563273B2 - refrigerator - Google Patents

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JP6563273B2
JP6563273B2 JP2015156750A JP2015156750A JP6563273B2 JP 6563273 B2 JP6563273 B2 JP 6563273B2 JP 2015156750 A JP2015156750 A JP 2015156750A JP 2015156750 A JP2015156750 A JP 2015156750A JP 6563273 B2 JP6563273 B2 JP 6563273B2
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compartment
cold air
damper
refrigerator
temperature
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徹 川浪
徹 川浪
卓也 河野
卓也 河野
佑祈 太田
佑祈 太田
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Sharp Corp
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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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