JP4223017B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator having first and second storage chambers that are insulated and isolated and in which a path of cold air is parallel.

  A conventional refrigerator is disclosed in Patent Document 1. This refrigerator has a temperature switching chamber that switches the room temperature to a desired temperature zone such as freezing, refrigeration, partial, chilled, etc. according to the user's application. The temperature switching chamber is insulated from the freezer compartment, and a cold air path connected to an evaporator for generating cold air is in parallel with the freezer compartment. The cold air generated in the evaporator by driving the compressor is sent to the temperature switching chamber and the freezer compartment by the operation of the blower. Thereby, the temperature switching chamber and the freezing chamber are cooled.

When a high-temperature store is stored in the temperature switching chamber, the coarse heat removal mode can be selected. In the coarse heat removal mode, the air volume and the number of rotations of the compressor are increased, and cool air is sent into the temperature switching chamber for a predetermined time, so that the temperature switching chamber can be rapidly cooled. Thereby, cooking items, such as pudding, jelly, and a hamburger seed, can be rapidly cooled and cooking time can be shortened.
Japanese Patent Laid-Open No. 2002-22335 (pages 4-9, FIG. 1)

  However, according to the refrigerator disclosed in the above-mentioned patent document, rapid cooling in the temperature switching chamber is performed for a predetermined time, and the rough heat removal mode ends. For this reason, there is a problem that the cooking time cannot be sufficiently shortened due to insufficient cooling because the cooked product is not cooled to a desired temperature in the coarse heat removal mode. In addition, the cooked product is supercooled in the coarse heat removal mode, and there is a problem that cooking that satisfies the user cannot be performed.

  An object of the present invention is to provide a refrigerator capable of preventing insufficient cooling and overcooling in the rough heat removal mode.

In order to achieve the above object, a refrigerator according to the present invention has first and second storage chambers that are insulated from heat and branch into first and second storage chambers in which cold air generated by an evaporator is arranged in parallel. A first damper that opens and closes a path connecting the evaporator and the inflow side of the second storage chamber in the refrigerator in which the cold air flowing out from the first and second storage chambers merges and returns to the evaporator. A second damper that opens and closes a path connecting the evaporator and the outflow side of the second storage chamber and guides cool air to the inflow side of the second storage chamber; and the second damper when the first and second dampers are closed. A blower for circulating cold air in the storage room,
The first and second dampers are always opened and the blower is driven to cool the second storage chamber, and the cool air path between the evaporator and the first storage chamber is opened to cool the first storage chamber. In addition, a rough heat removal mode is provided in which the first and second dampers are closed and the blower is driven to circulate the air in the second storage chamber for a predetermined period and then repeat the temperature detection operation for detecting the temperature in the second storage chamber. The rough heat removal mode is terminated when the temperature in the second storage chamber detected by the temperature detection operation is lower than a predetermined temperature.

  According to this configuration, the cold air generated by the evaporator flows through the first and second storage chambers and cools the first and second storage chambers. The second storage chamber is provided with a dedicated blower that can circulate indoor air. When the rough heat removal mode is selected by the user, the cooling of the first storage room is continued and the blower is driven to perform the rapid cooling operation of the second storage room. When the rapid cooling operation is performed for a predetermined period, the temperature detection operation is performed in which the first and second dampers are closed and the cool air in the second storage chamber is circulated by driving the blower. In the temperature detection operation, the air in the second storage chamber is circulated for a predetermined period, and then the temperature in the second storage chamber is detected. When the detected temperature at this time is lower than the predetermined temperature, the rough heat removal mode is terminated, and when it is higher than the predetermined temperature, the rapid cooling operation and the temperature detecting operation are repeated again.

  According to the present invention, in the refrigerator configured as described above, the second storage chamber includes a temperature switching chamber that can be switched to a desired indoor temperature. According to this configuration, the room temperature of the second storage chamber after the end of the rough heat removal mode can be switched to a desired temperature zone such as freezing, refrigeration, partial, chilled, etc. according to the user's selection.

  Further, the present invention is characterized in that, in the refrigerator configured as described above, when the operation time of the rapid cooling operation elapses a predetermined time, the operation is switched to the temperature detection operation. According to this configuration, timing is started when the first and second dampers are opened and the rapid cooling operation is started, and when the predetermined time has elapsed, the first and second dampers are closed and the temperature detecting operation is switched.

  In the refrigerator having the above-described configuration, the rough heat removal mode is terminated when the rapid cooling operation and the temperature detection operation are repeated a predetermined number of times. According to this configuration, when the preset number of repetitions is reached, the rough heat removal mode ends regardless of the temperature in the second storage chamber.

  Further, the present invention is characterized in that in the refrigerator configured as described above, an informing means for informing the end of the rough heat removal mode is provided.

  According to the present invention, a rough heat removal mode for repeatedly performing a rapid cooling operation and a temperature detection operation is provided, and when the temperature in the second storage chamber becomes lower than a predetermined temperature in the temperature detection operation, the rough heat removal mode is terminated. The second storage chamber can be brought to a desired temperature by the coarse heat removal mode. Therefore, it is possible to prevent an increase in cooking time and overcooling of the cooked product due to insufficient cooling of the cooked product. Further, since air circulates during the temperature detection operation, the temperature in the second storage chamber can be made uniform and the temperature can be accurately detected.

  Further, according to the present invention, since the second storage chamber is composed of the temperature switching chamber, the stored product can be stored at a desired temperature such as frozen storage or refrigeration storage after the end of the rough heat removal mode.

  Further, according to the present invention, when the rapid cooling operation is performed for a predetermined time, the operation is switched to the temperature detection operation, and the temperature is accurately detected. Thereby, it is possible to accurately determine when to end the rough heat removal mode.

  Further, according to the present invention, since the rough heat removal mode is terminated when the rapid cooling operation and the temperature detection operation are repeated a predetermined number of times, rapid cooling with large power consumption can be stopped to reduce power consumption.

  Further, according to the present invention, since the notification means for notifying the end of the rough heat removal mode is provided, the user can easily know the cooling of the cooked product, and a highly convenient refrigerator can be obtained.

  Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are a front view and a right side view showing a refrigerator according to one embodiment. The refrigerator 1 is provided with a refrigerator compartment 2 in the upper stage, and a temperature switching room 3 and an ice making room 4 in the middle stage. A vegetable room 5 and a freezer room 6 are arranged in the lower stage of the refrigerator 1.

  The refrigerating room 2 has a double door and stores stored items in a refrigerator. The temperature switching chamber 3 is provided on the left side of the middle stage, and the room temperature can be switched by the user. The ice making chamber 4 is provided on the right side of the middle stage and performs ice making. The vegetable room 5 is provided on the lower left side and is maintained at a temperature suitable for vegetable storage (about 8 ° C.). The freezer compartment 6 is provided on the lower right side and communicates with the ice making compartment 4 to store the stored items in a frozen state.

  FIG. 3 is a right side sectional view of the refrigerator 1. The freezing compartment 6 and the ice making compartment 4 are provided with a storage case 11 for storing stored items. A similar storage case 11 is also provided in the vegetable room 5 and the temperature switching room 3. The refrigerator compartment 2 is provided with a plurality of storage shelves 41 on which stored items are placed. A storage pocket 42 is provided on the door of the refrigerator compartment 2. Thereby, the usability of the refrigerator 1 is improved. A chilled chamber 23 maintained at a chilled temperature zone (about −3 ° C.) is provided in the lower part of the refrigerator compartment 2.

  A cold air passage 31 is provided behind the freezer compartment 6, and an evaporator 17 connected to the compressor 35 is disposed in the cold air passage 31. A cold air passage 32 communicating with the cold air passage 31 is provided behind the refrigerator compartment 2. A refrigerant such as isobutane is circulated by driving a compressor 35 connected to a condenser and an expander (both not shown) to operate a refrigeration cycle. Thereby, cold air | gas is produced | generated by heat exchange with the evaporator 17 used as the low temperature side of a refrigerating cycle. Therefore, the compressor 35 and the evaporator 17 constitute a cooling device that generates cold air together with the condenser and the expander.

  Further, blowers 18 and 28 are arranged in the cold air passages 31 and 32, respectively. As will be described in detail later, the cold air generated by the evaporator 17 is supplied to the freezer compartment 6, the ice making chamber 4, the chilled chamber 23, and the temperature switching chamber 3 through the cold air passage 31 by driving the blower 18. Further, the fan 28 is supplied to the refrigerator compartment 2 and the vegetable compartment 5 through the cold air passage 32.

  FIG. 4 is a right side sectional view showing the temperature switching chamber 3. The upper and lower surfaces of the temperature switching chamber 3 are insulated from the refrigerator compartment 2 and the vegetable compartment 5 by heat insulation walls 7 and 8. The side surface of the temperature switching chamber 3 is insulated from the ice making chamber 4 and the freezing chamber 6 by a heat insulating wall (not shown). The front surface of the temperature switching chamber 3 can be opened and closed by a rotating door 9. The back surface of the temperature switching chamber 3 is covered with a back plate 33.

  An inlet 33a through which air flows into the temperature switching chamber 3 is provided at the upper part of the back plate 33, and an outlet 33b through which air flows out from the temperature switching chamber 3 is provided at the lower part. Further, temperature sensors 24 and 16 for detecting the temperature of the air are provided in the vicinity of the inlet 33a and the outlet 33b.

  An introduction ventilation path 12 is provided behind the back plate 33 and the heat insulating wall 10 that forms the outer wall. The introduction ventilation path 12 is provided with a temperature switching chamber discharge damper 13 (first damper, see FIG. 5), and cool air generated in the evaporator 17 (see FIG. 3) communicating with the cold air passage 31 is transferred to the temperature switching chamber 3. Lead. The cool air path between the evaporator 17 and the inflow side of the temperature switching chamber 3 is opened and closed by opening and closing the temperature switching chamber discharge damper 13, and the amount of air flowing into the temperature switching chamber 3 from the introduction ventilation path 12 is adjusted by the opening and closing amount. .

  In the introduction ventilation path 12, a blower 14 is provided between the temperature switching chamber discharge damper 13 and the inflow port 33a. The cool air in the cool air passage 31 is easily guided to the temperature switching chamber 3 by driving the blower 14.

  A temperature switching chamber return damper 20 (second damper) is provided behind the outlet 33b. The temperature switching chamber return damper 20 has openings 20a and 20b, and has a rotating plate 20c that opens one side by rotation and closes the other. When the opening 20b is opened, the air flowing out from the temperature switching chamber 3 is guided to the evaporator 17 via the return ventilation path 19 (see FIG. 5).

  When the opening 20a is opened, the air flowing out from the temperature switching chamber 3 is guided to the intake side of the blower 14, and the cool air path between the outflow side of the temperature switching chamber 3 and the evaporator 17 is closed. Therefore, the air in the temperature switching chamber 3 can be circulated as shown by the arrow F by driving the blower 14, closing the opening 20 b and closing the temperature switching chamber return damper 20. Note that the blower 14 may be provided in the temperature switching chamber 3.

  A heater 15 is provided behind the inlet 33 a of the temperature switching chamber 3. The heater 15 is formed of a heat radiation type glass tube heater, and raises the temperature of the temperature switching chamber 3 by radiant heat released through the back plate 33. The blower 14 is disposed so as to blow toward the surface of the heater 15. Thereby, the surface temperature of the heater 15 can be lowered and safety can be improved. Further, the outlet 33b is provided with a temperature fuse 30 that cuts off the energization of the heater 15 when the temperature reaches a predetermined temperature.

  In the temperature switching chamber 3, a drawer-type storage case 11 on which stored items are placed is arranged. A temperature sensor 34 is provided on the bottom surface of the storage case 11. Thereby, the temperature of the stored item placed on the storage case 11 can be accurately detected.

  FIG. 5 is a front sectional view of the vicinity of the middle stage of the refrigerator 1. The cool air passage 31 behind the freezer compartment 6 opens at the upper front of the blower 18, and air is sent to the ice making chamber 4 by the blower 18. A freezer compartment damper 22 is provided below the freezer compartment 6 that communicates with the ice making compartment 4. A return ventilation path 21 (see FIG. 3) is provided in the lower rear part of the freezer compartment 6 to guide air to the evaporator 17 via the freezer damper 22 and return to the cool air passage 31. The amount of air flowing out of the freezer compartment 6 is adjusted by opening and closing the freezer compartment damper 22.

  The upper part of the cold air passage 31 communicates with the cold air passage 32 via the refrigerator compartment damper 27. Further, the cold air passage 31 is branched and communicates with the chilled chamber 23 via the chilled chamber damper 25 and also communicates with the introduction ventilation path 12 (see FIG. 4) as described above.

  A refrigerator outlet (not shown) is opened at the lower back of the refrigerator compartment 2 and a vegetable compartment inlet (not shown) is provided in the vegetable compartment 5. The refrigerator compartment outlet and the vegetable compartment inlet are connected by a passage (not shown) passing through the back surface of the temperature switching chamber 3 so that the refrigerator compartment 2 and the vegetable compartment 5 communicate with each other.

  The temperature switching chamber return damper 20 is provided in the lower left part of the temperature switching chamber 3. Behind the temperature switching chamber 3 and the vegetable chamber 5 is provided a return ventilation path 19 that extends downward from the temperature switching chamber return damper 20 and communicates with the return ventilation path 21 (see FIG. 3). As described above, the air in the temperature switching chamber 3 is guided to the evaporator 17 through the return ventilation paths 19 and 21 by opening the opening 20b (see FIG. 4) of the temperature switching chamber return damper 20. A vegetable room outlet (not shown) communicating with the return ventilation path 19 is provided on the back of the vegetable room 5.

  FIG. 6 is a cold air circuit diagram showing the flow of cold air in the refrigerator 1. The freezer compartment 6, the refrigerator compartment 2, and the temperature switching chamber 3 are each arranged in parallel. Further, the ice making room 4 is arranged in series with the freezing room 6, and the chilled room 23 and the vegetable room 5 are arranged in series with the refrigerating room 2. The cold air generated by the evaporator 17 is sent up to the ice making chamber 4 by raising the cold air passage 31 as shown by an arrow A (see FIG. 5) by driving the blower 18. The cold air sent to the ice making room 4 flows through the ice making room 4 and the freezing room 6 and flows out from the freezing room damper 22. And it returns to the evaporator 17 via the return ventilation path 21. As a result, the ice making chamber 4 and the freezing chamber 6 are cooled.

  The cold air branched at the top of the cold air passage 31 by driving the blower 28 circulates through the cold air passage 32 as shown by an arrow B (see FIG. 5) via the refrigerating chamber damper 27 and is sent to the refrigerating chamber 2. Moreover, it is sent to the chilled chamber 23 as shown by an arrow C (see FIG. 5). These cold air flows through the refrigerator compartment 2 and the chilled compartment 23 and then flows into the vegetable compartment 5. The cold air flowing into the vegetable compartment 5 flows through the vegetable compartment 5 and returns to the evaporator 17 via the return passages 19 and 21. Thereby, the inside of the refrigerator compartment 2 and the vegetable compartment 5 is cooled, and if it becomes preset temperature, the refrigerator compartment damper 27 and the chilled compartment damper 23 will be closed.

  Further, the cold air branched at the upper portion of the cold air passage 31 by driving the blower 14 circulates through the introduction ventilation path 12 as shown by an arrow D (see FIG. 5), and enters the temperature switching chamber 3 via the temperature switching chamber discharge damper 13. Inflow. The cold air that has flowed into the temperature switching chamber 3 flows through the temperature switching chamber 3 and flows out of the temperature switching chamber return damper 20. And as shown to the arrow E (refer FIG. 5), it returns to the evaporator 17 via the return ventilation path 19,21. Thereby, the inside of the temperature switching chamber 3 is cooled.

  As described above, the temperature switching chamber 3 can switch the room temperature by a user's operation. FIG. 7 is a front view showing a door panel provided in front of the temperature switching chamber 3. The door panel 40 is provided with a display unit 42 including an operation switch 41 and a plurality of indicators 42a to 42h. Thereby, the user can easily visually recognize and determine each operation mode.

  The operation switch 41 switches each operation mode of the temperature switching chamber 3 by a user operation. Each indicator 42a-42h lights, and alert | reports each operation mode of the temperature switching chamber 3. FIG. The operation modes of the temperature switching chamber 3 are wine (8 ° C.), refrigeration (3 ° C.), chilled (−3 ° C.), soft freezing (−8 ° C.), and freezing (−15 ° C.) depending on the temperature zone. Is provided and notified by the indicators 42a to 42h.

  Thus, the user can store the stored product in a frozen state or a refrigerated state at a desired temperature. The room temperature can be switched by changing the amount of opening of the temperature switching chamber discharge damper 13. For example, the heater 15 may be energized to switch the temperature from the freezing room temperature to the refrigerated room temperature. Thereby, it can switch to desired room temperature rapidly.

  Further, by energizing the heater 15, the room temperature of the temperature switching chamber 3 is switched from the low temperature side where the stored items are stored frozen or refrigerated to the high temperature side where the cooked heated food is temporarily kept warm or cooked. Can do. On the high temperature side, a heating mode of 8 hours or 4 hours is provided, which is notified by the indicators 42a and 42b, respectively.

  Since the growth temperature of the main food poisoning bacteria is 30 ° C. to 45 ° C., the indoor temperature on the high temperature side is preferably set to 50 ° C. or more in consideration of the tolerance of the heater capacity, the temperature distribution in the temperature switching chamber 3, and the like. Thereby, propagation of miscellaneous bacteria can be prevented. Moreover, since the heat-resistant temperature of the general resin parts used for a refrigerator is 80 degreeC, when the room temperature of a high temperature side shall be 80 degrees C or less, it can implement | achieve cheaply.

  In order to sterilize food poisoning bacteria, for example, in the case of enterohemorrhagic E. coli (pathogenic E. coli O157), heating at 75 ° C. for 1 minute is required. Therefore, it is more preferable that the room temperature on the high temperature side is set to 80 ° C. in consideration of the tolerance of the heater capacity and the temperature distribution in the temperature switching chamber 3.

The following are the test results on the sterilization of food poisoning bacteria at 55 ° C. In the initial state, E. coli 2.4 × 10 ³ CFU / mL, Staphylococcus aureus 2.0 × 10 ³ CFU / mL, Salmonella 2.1 × 10 ³ CFU / mL, Vibrio parahaemolyticus 1.5 × 10 ³ CFU / ML, Cereus 4.0 × 10 ³ CFU / mL. This test sample was heated from 3 ° C. to 55 ° C. over 40 minutes, kept at 55 ° C. for 3.5 hours, then returned from 55 ° C. to 3 ° C. over 80 minutes, and the amount of each bacterium was examined again. As a result, all the bacteria were reduced to a level of 10 CFU / mL or less (not detected). Therefore, even if the set temperature on the high temperature side of the temperature switching chamber 3 is 55 ° C., there is a sufficient sterilization effect.

  Further, a rough heat removal mode is provided in which rough heat removal is performed on a high-temperature stored item stored in the temperature switching chamber 3 by operating the operation switch 41. The rough heat removal mode is notified by the display 42c. FIG. 8 is a flowchart showing the operation in the rough heat removal mode. When the rough heat removal mode is selected, the blower 14 is turned on in step # 11, and the opening 20b of the temperature switching chamber discharge damper 13 and the temperature switching chamber return damper 20 is opened in step # 12. As a result, a cool air path between the evaporator 17 and the temperature switching chamber 3 is opened, and a large amount of cool air passes through the temperature switching chamber 3 and a rapid cooling operation is performed.

  In step # 13, the system is on standby until a predetermined time elapses in the rapid cooling operation. When the predetermined time elapses, the process proceeds to step # 14. In step # 14, it is determined whether or not the number of rapid cooling operations is equal to or less than a predetermined number. If the rapid cooling operation is less than the predetermined number, the process proceeds to step # 15. When the rapid cooling operation exceeds a predetermined number of times, the rough heat removal mode is terminated. Thereby, the rapid cooling operation with large power consumption of the compressor 35 and the blower 14 can be stopped to save power. Upon completion of the rough heat removal mode, the temperature switching chamber 3 is cooled in a predetermined mode on the low temperature side.

  In steps # 15 to # 17, a temperature detection operation is performed in which the air in the temperature switching chamber 3 is circulated to detect the room temperature. In step # 15, the temperature switching chamber discharge damper 13 is closed, and the opening 20b of the temperature switching chamber return damper 20 is closed. Thereby, the air in the temperature switching chamber 3 circulates.

  In step # 16, the process waits until a predetermined time elapses. When the predetermined time has elapsed, the process proceeds to step # 17. In step # 17, it is determined whether or not the detected temperature of any of the temperature sensors 16, 24, and 34 has become equal to or lower than a predetermined temperature. During the rapid cooling operation, the temperature sensors 16, 24, and 34 are in contact with the cold air circulating, so that the temperature is low even if the temperature is detected. On the other hand, since the cold air circulates in the temperature switching chamber 3 during the temperature detection operation and heat exchange proceeds with the stored material having a high temperature, when the temperature is detected by the temperature sensors 16, 24, 34, the detected temperature gradually increases. To rise. Therefore, after the air is circulated for a predetermined time, the temperature is detected by the temperature sensors 16, 24, and 34 to determine whether the temperature is lower than the predetermined temperature.

  If the detected temperature of any of the temperature sensors 16, 24, 34 is higher than the predetermined temperature, the process returns to step # 12. Then, the cool air path between the evaporator 17 and the temperature switching chamber 3 is opened, and the rapid cooling operation and the temperature detecting operation in steps # 12 to # 17 are repeatedly performed. When the detected temperature of any of the temperature sensors 16, 24, and 34 is equal to or lower than the predetermined temperature, the rough heat removal mode is terminated. When the rough heat removal mode is completed, the mode is shifted to a cooling mode such as refrigeration or freezing selected in advance. At this time, the temperature switching chamber damper 13 and the temperature switching chamber return damper 20 are opened and closed to be maintained at a predetermined temperature.

  In step # 17, it is determined whether or not the detected temperature of any of the temperature sensors 16, 24, and 34 has become equal to or lower than a predetermined temperature. On the other hand, it may be determined whether or not all the detected temperatures of the temperature sensors 16, 24, and 34 have reached a predetermined temperature or a predetermined temperature difference. That is, it is only necessary to accurately determine whether or not the room temperature of the temperature switching chamber 3 has reached a predetermined temperature or a predetermined temperature difference. Further, only one or two of the temperature sensors 16, 24, 34 may be provided.

  In the present embodiment, a damper may be provided at the outlet of the vegetable compartment 5. Thereby, when the temperature switching chamber 3 is switched from the high temperature side to the low temperature side, it is possible to prevent the hot air from the temperature switching chamber 3 from flowing backward into the vegetable chamber 5 by closing the damper. In addition, when the blower 18 is stopped when the temperature switching chamber 3 is switched from the high temperature side to the low temperature side, the freezer compartment damper 22 is closed. Thereby, it is possible to prevent hot air from flowing backward from the freezer damper 22 into the freezer compartment 6 by driving the blower 14.

  According to the present embodiment, the refrigerator compartment 2, the freezer compartment 6, the chilled compartment 3, the vegetable compartment 5 (all are the first storage compartment) and the temperature switching chamber 3 (the second storage compartment) are insulated and isolated, and the cold air circuit is Since it is configured in parallel, the air in the temperature switching chamber 3 can be circulated while cooling the other storage chambers. When the coarse heat removal mode is selected when a high-temperature stored product is stored in the temperature switching chamber 3, a rapid cooling operation in which air passes through the temperature switching chamber 3 and a temperature detection operation in which air circulates are repeatedly performed.

  Since the rough heat removal mode is terminated when the temperature in the temperature switching chamber 3 after the air is circulated in the temperature detection operation becomes lower than the predetermined temperature, the temperature switching chamber 3 is set to a desired temperature in the rough heat removal mode. Can be cooled down to. Therefore, it is possible to prevent an increase in cooking time and overcooling of the cooked product due to insufficient cooling of the cooked product. In addition, since the temperature is detected after the air circulates for a predetermined time during the temperature detection operation, whether or not the temperature switching chamber 3 has been lowered to a desired temperature due to heat exchange between the high-temperature storage and the air in the temperature switching chamber 3. Can be accurately determined.

  The storage room that can execute the coarse heat removal mode may not be able to switch the temperature. That is, as long as the cold air circuit is a storage room that is insulated and insulated in parallel with the refrigerating room 2 or the like, a storage room that is kept constant at the refrigerating temperature or the freezing temperature may be used. In addition, by making the storage chamber that can execute the rough heat removal mode into the temperature switching chamber 3, the stored product can be stored at a desired temperature such as frozen storage or refrigeration storage after the completion of the rough heat removal mode.

  Examples of the present invention will be described below. FIG. 9 shows changes in the temperature of the stored item and the temperature detected by the temperature sensor 16 in the coarse heat removal mode of the first embodiment. The vertical axis represents temperature (unit: ° C), and the horizontal axis represents time (unit: minutes). The stored food consists of a pan with 1 liter of hot water. The operation time of the rapid cooling operation is set to 30 minutes, and the operation time of the temperature detection operation is set to 5 minutes. Further, the number of repetitions of the rapid cooling operation is set to 3 times.

  When the rough heat removal mode is started, a rapid cooling operation is performed, and cold air passes through the temperature switching chamber 3 to cool the food, and the temperature detected by the temperature sensor 16 decreases due to the circulation of the cold air. When the rapid cooling operation is performed for 30 minutes, the operation shifts to a temperature detection operation, and the temperature detected by the temperature sensor 16 increases due to heat exchange with food. When the temperature detection operation is performed for 5 minutes, it is determined whether or not the rough heat removal mode is to be ended. Since the detected temperature is higher than −2 ° C., the rapid cooling operation is started again.

  When the rapid cooling operation is performed for 30 minutes, the operation shifts to the temperature detection operation, and since the detected temperature after 5 minutes is higher than −2 ° C., the operation further proceeds to the rapid cooling operation. Then, when the rapid cooling operation is performed for 30 minutes, since the number of repetitions is set to 3, the rough heat removal mode is terminated and the normal cooling operation is performed. As a result, the stored material is lowered to near the desired temperature and power saving is achieved, and the coarse heat removal mode ends.

  FIG. 10 shows changes in the temperature of the stored item and the temperature detected by the temperature sensor 16 in the coarse heat removal mode of the second embodiment. Similar to the first embodiment, the vertical axis represents temperature (unit: ° C) and the horizontal axis represents time (unit: minutes). The operation time of the rapid cooling operation is set to 30 minutes, and the operation time of the temperature detection operation is set to 5 minutes. Further, the number of repetitions of the rapid cooling operation is set to 3 times. The stored food consists of tea bowls with 200g of rice.

  When the rough heat removal mode is started, the rapid cooling operation is performed for 30 minutes, and when 5 minutes have passed since the transition to the temperature detection operation, it is determined whether or not the rough heat removal mode is to be ended. Since the temperature detected by the temperature sensor 16 is lower than −2 ° C., the rough heat removal mode is terminated and the normal cooling operation is performed. As a result, the stored product is cooled to a desired temperature, and the coarse heat removal mode is completed.

  ADVANTAGE OF THE INVENTION According to this invention, it can utilize for the refrigerator which has the 1st, 2nd storage chamber by which a cold-air circuit is distribute | arranged in parallel, and performs the rough heat removal of a high temperature stored item.

The front view which shows the refrigerator of embodiment of this invention The right view which shows the refrigerator of embodiment of this invention Sectional drawing of right side which shows the refrigerator of embodiment of this invention Cross section of the right side showing the temperature switching chamber of the refrigerator of the embodiment of the present invention Front sectional drawing which shows the middle step part of the refrigerator of embodiment of this invention Cold air circuit diagram showing the flow of cold air in the refrigerator of the embodiment of the present invention The front view which shows the door panel of the temperature switching chamber of the refrigerator of embodiment of this invention The flowchart which shows the operation | movement of the rough heat removal mode of the refrigerator of embodiment of this invention. The figure which shows the temperature change of the rough heat removal mode of the refrigerator of 1st Example of this invention. The figure which shows the temperature change of the rough heat removal mode of the refrigerator of 2nd Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigeration room 3 Temperature switching room 4 Ice making room 5 Vegetable room 6 Freezing room 9 Door 12 Introduction ventilation path 13 Temperature switching room discharge damper 14, 18, 28 Blower 15 Heater 17 Evaporator 16, 24, 34 Temperature sensor 19, 21 Return ventilation path 20 Temperature switching room return damper 22 Freezing room damper 25 Chilled room damper 30 Thermal fuse 31, 32 Cold air passage 33 Back plate 35 Compressor 40 Door panel 41 Operation switch 42 Display section

Claims (5)

The first and second storage chambers are insulated and isolated, and the cold air generated by the evaporator branches into the first and second storage chambers arranged in parallel and flows out from the first and second storage chambers. A first damper that opens and closes a path connecting the evaporator and the inflow side of the second storage chamber, and an outflow side of the evaporator and the second storage chamber. A second damper that opens and closes the path connecting the two and introduces cool air to the inflow side of the second storage chamber, and a blower that circulates the cool air of the second storage chamber when the first and second dampers are closed,
The first and second dampers are always opened and the blower is driven to cool the second storage chamber, and the cool air path between the evaporator and the first storage chamber is opened to cool the first storage chamber. In addition, a rough heat removal mode is provided in which the first and second dampers are closed and the blower is driven to circulate the air in the second storage chamber for a predetermined period and then repeat the temperature detection operation for detecting the temperature in the second storage chamber. The refrigerator is characterized in that the rough heat removal mode is terminated when the temperature in the second storage chamber detected by the temperature detection operation is lower than a predetermined temperature.   The refrigerator according to claim 1, wherein the second storage room includes a temperature switching room that can be switched to a desired room temperature.   The refrigerator according to claim 1 or 2, wherein when the operation time of the rapid cooling operation has passed a predetermined time, the temperature detection operation is switched.   The refrigerator according to any one of claims 1 to 3, wherein the rough heat removal mode is terminated when the rapid cooling operation and the temperature detection operation are repeated a predetermined number of times.   The refrigerator according to any one of claims 1 to 4, further comprising a notification unit that notifies the end of the rough heat removal mode.

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