JP2007309530A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of preventing supercooling of a storage compartment and saving electric power. <P>SOLUTION: In this refrigerator 1 having air blowers 24, 18 for distributing the cold air generated in a cooler 17 to a refrigerating compartment 2 and a freezing compartment 6, and having an ordinary mode for cooling the refrigerating compartment 2 and the freezing compartment 6 while driving the air blowers 24, 18 with prescribed rotational frequency, and a silent mode for cooling the refrigerating compartment 2 and the freezing compartment 6 while driving the air blowers 24, 18 with rotational frequency lower than that in the ordinary mode, the mode is switched to the ordinary mode when a temperature of the refrigerating compartment 2 or the freezing compartment 6 becomes higher than a prescribed temperature in the silent mode. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a refrigerator provided with a silent mode in which a blower for sending cold air to a storage room is operated at a lower rotational speed than usual.

  A conventional refrigerator is disclosed in Patent Document 1. This refrigerator has a blower for sending cold air generated by a cooler to a storage room, and has a normal mode and a silent mode. In the normal mode, the storage room is cooled by driving the blower at a predetermined rotational speed. In the silent mode, the blower is driven at a lower rotational speed than in the normal mode to cool the storage chamber and suppress the noise of the blower.

When it is determined that the room in which the refrigerator is installed is dark, the normal mode is switched to the silent mode. Thereby, noise at the time of going to bed can be suppressed and power saving can be achieved. Further, when the door of the storage room is opened during the silent mode, the mode is switched to the normal mode. Thereby, the temperature rise in the storage chamber can be prevented.
No. 2-114267 (pages 5-9, FIG. 3)

  However, according to the conventional refrigerator, the silent mode is switched to the normal mode even when the storage chamber is maintained at the set temperature when the door of the storage chamber is opened. Therefore, there is a problem that the storage chamber is supercooled and power is wasted.

  An object of the present invention is to provide a refrigerator that can prevent overcooling of a storage room and can save power.

  In order to achieve the above object, the present invention has a blower that sends cold air generated by a cooler to a storage chamber, and drives the blower at a predetermined number of revolutions to cool the storage chamber; In a refrigerator having a silent mode for cooling the storage chamber by driving the blower at a lower rotational speed than the normal mode, the normal mode is entered when the temperature of the storage chamber becomes higher than a predetermined temperature in the silent mode. It is characterized by switching.

  According to this configuration, the blower is driven at a predetermined rotational speed to cool the storage room such as the refrigerator compartment or the freezer compartment in the normal mode, and the rotational speed of the blower is lowered and switched to the silent mode under a predetermined condition. Thereafter, when the temperature in the refrigerator compartment or the freezer compartment becomes higher than a predetermined temperature, the number of revolutions of the blower is increased to switch to the normal mode regardless of whether the door of the storage compartment is opened or closed. A plurality of storage rooms may be provided, and the rotational speed of the blower is varied according to the temperature of any of the storage rooms.

  In the refrigerator having the above-described configuration, the present invention switches to the normal mode when the temperature of the storage chamber becomes higher than a predetermined temperature after maintaining the silent mode when the door of the storage chamber is opened in the silent mode. It is characterized by that. According to this configuration, the silent mode is maintained without switching to the normal mode even if the door of the storage room is opened in the silent mode. When the temperature of the storage room rises due to the opening of the door, it is switched to the normal mode. When the door is opened and closed and the storage room is kept at a low temperature, the silent mode is continued.

  In the refrigerator configured as described above, the storage chamber may include a freezer compartment, and when the difference between the temperature of the cooler and the temperature of the freezer compartment is greater than a predetermined temperature in the silent mode, It is characterized by switching to a defrosting mode in which the temperature is defrosted by a defrosting heater. According to this configuration, when frost is formed in the cooler, the temperature in the freezer compartment does not decrease to a desired temperature even if the temperature of the cooler is lowered. For this reason, when the difference between the temperature of the cooler and the temperature of the freezer compartment exceeds a predetermined temperature, the defrosting heater is driven, and the cooler is defrosted by heating.

  In the refrigerator configured as described above, the storage chamber may include a freezer compartment, and when the difference between the temperature of the cooler and the temperature of the freezer compartment is greater than a first predetermined temperature during the silent operation mode, Switch to the normal mode, and when the difference between the temperature of the cooler and the temperature of the storage chamber becomes larger than the second predetermined temperature larger than the first predetermined temperature in the normal mode, the cooler is moved by the defrosting heater. It is characterized by switching to a defrost mode in which the temperature is raised and defrosted.

  Further, the present invention is characterized in that, in the refrigerator having the above-described configuration, the silent mode is canceled based on the temperature of the inlet where the refrigerant flows into the cooler. According to this configuration, the silent mode is canceled by the difference between the temperature of the inlet of the cooler and the temperature of the freezer, and the mode is switched to the normal mode or the defrost mode.

  Further, the present invention provides a refrigerator having the above-described configuration, wherein a temperature sensor that detects the temperature in the vicinity of the cooler is provided, and the defrosting is performed when the vicinity of the cooler becomes higher than a predetermined temperature by the detection of the temperature sensor. The heater is stopped and the temperature of the inflow port is detected based on the temperature detected by the temperature sensor. According to this configuration, the temperature sensor detects the temperature near the cooler, and the defrosting heater is stopped when the temperature near the cooler becomes high. The temperature at the inlet of the cooler is obtained from the temperature detected by the temperature sensor, and the silent mode is canceled.

  According to the present invention, when the temperature of the storage chamber becomes higher than the predetermined temperature in the silent mode, the mode is switched to the normal mode, so that the cooling power can be increased by increasing the rotational speed of the blower. Therefore, since the rotation speed of the blower is not increased when the storage chamber is at a low temperature, it is possible to prevent overcooling of stored items and to save power. Further, when the storage room becomes high temperature, the cooling power increases to prevent the deterioration of the stored items, and it is possible to save power by suppressing the driving of the compressor with large power consumption.

  In addition, according to the present invention, after maintaining the silent mode when the door of the storage room is opened, when the temperature of the storage room becomes higher than a predetermined temperature, the mode is switched to the normal mode. Don't be. Therefore, power saving can be achieved, and overcooling of stored items can be prevented.

  Further, according to the present invention, when the difference between the temperature of the cooler and the temperature of the freezer compartment becomes larger than a predetermined temperature, the mode is switched from the silent mode to the defrost mode, so that defrosting can be performed by accurately grasping frost adhesion. . Therefore, it is possible to prevent frosting from proceeding quickly due to the silent mode and to rapidly reduce the cooling efficiency, thereby preventing waste of electric power. Therefore, further power saving can be achieved.

  Further, according to the present invention, when the difference between the temperature of the cooler and the temperature of the freezer becomes larger than a predetermined temperature, the mode is switched from the silent mode to the normal mode, and when the temperature difference is further increased, the mode is switched to the defrosting mode. It is possible to accurately grasp the frosted progress in the normal mode. Therefore, it is possible to prevent waste of electric power due to a rapid decrease in cooling efficiency and to extend the energization interval of the defrosting heater. Therefore, further power saving can be achieved.

  According to the present invention, since the silent mode is canceled based on the temperature of the inlet into which the refrigerant flows into the cooler, the inlet of the cooler becomes a low temperature before heat exchange with the air, and when there is frost. The temperature difference from the freezer compartment increases. For this reason, the frost formation of a cooler can be detected at an early stage and the progress of frost formation can be stopped.

  Further, according to the present invention, the defrosting heater is stopped by the temperature sensor that detects the temperature in the vicinity of the cooler, and the silent mode is stopped by detecting the temperature of the inlet, so that the number of parts can be reduced.

  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 storing vegetables (for example, 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 (for example, about −3 ° C.) is provided in the lower part of the refrigerator compartment 2.

  A cold air passage 7 is provided behind the freezer compartment 6, and a cooler 17 connected to the compressor 15 is disposed in the cold air passage 7. A refrigerant such as isobutane is circulated by driving a compressor 15 connected to a condenser and an expander (both not shown) to operate a refrigeration cycle. As a result, the cooler 17 on the low temperature side of the refrigeration cycle and the air flowing through the cold air passage 7 exchange heat to generate cold air.

  Behind the refrigerator compartment 2 is provided a cold air passage 8 communicating with the cold air passage 7 through a refrigerator compartment damper 26. Temperature sensors 30 and 29 for detecting temperatures in the freezer compartment 6 and the refrigerator compartment 2 are provided in front of the cold air passages 7 and 8, respectively. Blowers 18 and 24 are disposed in the cold air passages 7 and 8, respectively. The cool air generated by the cooler 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 cool air passage 7 by driving the blower 18. Moreover, cold air is supplied to the refrigerator compartment 2 and the vegetable compartment 5 through the cold passage 8 by driving the blower 24 and opening / closing the refrigerator compartment damper 26.

  FIG. 4 shows a front sectional view of the vicinity of the middle stage of the refrigerator 1. The refrigerator compartment 2 communicates with the vegetable compartment 5 via a communication path (not shown). The vegetable compartment 5 is provided with an outlet (not shown) through which air flows out, and communicates with the cold air passage 7 via a return passage 19. In addition, a freezer compartment damper 22 communicating with the cold air passage 7 is provided in the lower part of the freezer compartment 6.

  The cold air passage 7 branches at the top of the blower 18 and communicates with the chilled chamber 23 and the temperature switching chamber 3 via the chilled chamber damper 25 and the temperature switching chamber discharge damper 13, respectively. A blower 14 is provided in the temperature switching chamber 3, and a temperature switching chamber heater 27 is disposed in front of the blower 14. The air flowing out of the temperature switching chamber 3 is guided to the return passage 19 via the temperature switching chamber return damper 20.

  A defrosting heater 21 is installed in the cold air passage 7 below the cooler 17. A defrost mode in which the cooler 17 is defrosted by energization of the defrost heater 21 is performed. A temperature sensor 28 is directly attached to the inlet 17 a through which the refrigerant flows into the cooler 17, and the temperature sensor 16 is provided in the vicinity of the cooler 17.

  In the refrigerator 1 having the above-described configuration, the cold air generated by the cooler 17 moves up the cold air passage 7 by driving the blower 18 and is sent to the ice making chamber 4 and the freezer compartment 6. The air flowing through the ice making chamber 4 and the freezer compartment 6 flows out of the freezer damper 22 and returns to the cooler 17 through the cold air passage 7. As a result, the ice making chamber 4 and the freezing chamber 6 are cooled.

  The cold air branched at the upper part of the cold air passage 7 on the exhaust side of the blower 18 flows through the cold air passage 8 via the cold room damper 26 by driving the blower 24 and is sent to the cold room 2. Further, a part of the cold air branched at the upper part of the cold air passage 7 is sent to the chilled chamber 23 through the chilled chamber damper 25. 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 cooler 17 through the return ventilation path 19. Thereby, the inside of the refrigerator compartment 2 and the vegetable compartment 5 is cooled, and when it reaches preset temperature, the refrigerator compartment damper 26 and the chilled compartment damper 25 are closed.

  Further, the cold air branched at the upper part of the cold air passage 7 flows into the temperature switching chamber 3 through the temperature switching chamber discharge damper 13 by driving the blower 14. 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 it returns to the cooler 17 through the return ventilation path 19. Thereby, the inside of the temperature switching chamber 3 is cooled.

  Further, when the temperature switching chamber discharge damper 13 and the temperature switching chamber return damper 20 are closed and the temperature switching chamber heater 27 is driven, the temperature in the temperature switching chamber 3 is raised. Thereby, the inside of the temperature switching chamber 3 can be maintained at a temperature higher than room temperature, and the heated food can be kept warm.

  As described above, the fans 14, 18, and 24 are driven at a predetermined number of revolutions to send cool air into each storage chamber, and the normal mode for cooling each storage chamber is operated. The room temperature of each storage room is controlled by changing the drive rate of the compressor 15 and opening / closing the refrigerator compartment damper 26, the chilled compartment damper 25, and the temperature switching chamber discharge damper 13.

  In the normal mode, for example, when a predetermined condition is satisfied such as when the ON time of the compressor 15 is less than 30 minutes during the last four huntings, the mode is switched to the silent mode. Hunting is the period between when the compressor 15 that repeats ON / OFF is turned on and when it is turned on next, or when the compressor 15 is turned off and when it is turned off next. Is shown. In the silent mode, the fans 14, 18, and 24 are all driven at a lower rotational speed than in the normal mode. Thereby, while preventing the noise by the air blowers 14, 18, and 24, power saving can be achieved.

  When the temperature of the refrigerator compartment 2 detected by the temperature sensor 29 in the silent mode becomes higher than a predetermined temperature, the mode is switched to the normal mode. That is, when the refrigerator compartment 2 exceeds a predetermined temperature (for example, 10 ° C.) higher than the opening temperature of the refrigerator compartment damper 26 in the normal mode, the temperature is not lowered even though the refrigerator compartment damper 26 is already opened. For this reason, the rotation speed of the air blowers 14, 18, and 24 is increased to increase the air volume, and the temperature of the refrigerator compartment 2 is lowered.

  Further, when the temperature of the freezer compartment 6 detected by the temperature sensor 30 in the silent mode becomes higher than a predetermined temperature, the mode is switched to the normal mode. That is, when the freezer compartment 6 becomes higher than −15 ° C., for example, the rotational speed of the blowers 14, 18, 24 is increased and the air volume is increased. Thereby, cooling power increases and the temperature of each store room can be rapidly returned to predetermined temperature (for example, refrigerator 3 degreeC, freezer-19 degreeC). Note that while the refrigerator compartment damper 26 is closed, the drive of the blower 24 is stopped regardless of the silent mode or the normal mode. Further, while the temperature switching chamber 3 is maintained at the cooling temperature and the temperature switching chamber discharge damper 13 is closed, the driving of the blower 14 is stopped regardless of the silent mode or the normal mode.

  In addition, when the doors of the refrigerator compartment 3 and the freezer compartment 6 are opened, if the detected temperatures of the temperature sensors 29 and 30 are lower than 10 ° C. and −15 ° C. in the above example, the silent mode is maintained. When the door is opened and the temperature detected by the temperature sensor 29 or the temperature sensor 30 exceeds a predetermined temperature, the mode is switched to the normal mode as described above.

  If the difference between the temperature at which the refrigerator compartment damper 26 opened by the temperature sensor 29 is opened and the temperature at which switching to the normal mode is reduced, the cooling power can be increased at an early stage. For this reason, when importance is attached to prevention of deterioration of stored items in the refrigerator compartment 2, the difference between the temperature at which the refrigerator compartment damper 26 is opened and the temperature at which the normal chamber mode is switched may be reduced (for example, 1 ° C.).

  When cold air containing water vapor is cooled by the cooler 17 in each storage chamber, frost adheres to the cooler 17. The frost in the cooler 17 grows rapidly when the humidity in the storage chamber increases, for example, when food or water with a high water content is placed in the storage chamber or when the door is opened or closed in a humid chamber. As a result, the amount of air flowing through the cool air passage 7 decreases, and the temperature of the air exchanged with the cooler 17 increases, so that the cooling power decreases. In particular, in the silent mode where the rotational speed of the blower 17 is low, the circulating air volume decreases, so that the sublimation ability of frost attached to the cooler 17 is lowered. As a result, the frost growth rate of the cooler 17 is increased.

  FIG. 5 shows temperature changes of the cooler 17, the refrigerator compartment 2, and the freezer compartment 6 when water is poured into the refrigerator compartment 2. The vertical axis represents temperature, and the horizontal axis represents elapsed time. Each temperature is detected by temperature sensors 28, 29, and 30, respectively. In a state where frost is not attached to the cooler 17, the temperature of the freezer compartment 3 follows the temperature of the cooler 17. When water is introduced, frost adheres to the cooler 17, and the temperature of the refrigerator compartment 2 rises as shown by the solid line in FIG.

Since the refrigerator compartment 2 does not cool, the compressor 15 continues to operate, and the temperature of the cooler 17 decreases conversely. The freezer compartment 6 is initially cooled following the temperature drop of the cooler 17, but gradually rises after a slight time lag and the temperature difference between the freezer compartment 5 and the cooler 17 gradually increases. Then, the temperature difference between the cooler 17 and the freezer compartment 6 is transferred to the defrost mode when reaching T _DEF. At this time, time t0 has elapsed since the water was added.

  In the defrost mode, the silent mode is canceled and the blowers 14, 18, 24 and the compressor 15 are stopped, and then the defrost heater 21 is energized. Thereby, it is possible to accurately detect the timing of defrosting with respect to the frost on the cooler 17 in the silent mode. Therefore, it is possible to prevent frosting from proceeding quickly due to the silent mode and to rapidly reduce the cooling efficiency, thereby preventing waste of electric power. As a result, further power saving can be achieved.

In addition, since the growth speed of the frost of the cooler 17 increases when the circulating air volume decreases in the silent mode, the number of defrosting times may increase and the temperature of the storage room may increase. For this reason, after deactivating the silent mode, the defrosting mode may be performed after performing the normal mode. For example, as shown by the broken line in FIG. 5, the normal mode is entered when the temperature difference between the freezer compartment 6 and the cooler 17 becomes T _S smaller than T _DEF . At this time, time t1 has elapsed since the water was added.

As a result, the circulating air volume increases to increase the cooling power, and the frost growth rate of the cooler 17 decreases. When the temperature difference between the freezer compartment 6 and the cooler 17 becomes T _DEF larger than T _S , the mode is switched to the defrost mode. At this time, time t2 has elapsed since the water was added. Thereby, the timing which switches to defrost mode can be delayed from time t0 to time t2. Therefore, it is possible to reduce the number of defrosting times to prevent the temperature rise of the storage room, and to further save power.

Further, by appropriately setting the temperature difference T _S, (respectively 10 ° C. in the above example, -15 ° C.) temperature is the predetermined temperature of the refrigerating compartment 2 and the freezer compartment 6 by frosting silent mode released before rising up Is done. Thereby, the food can be better preserved.

  The temperature near the cooler 17 is detected by the temperature sensor 16, and when the temperature rises to a predetermined temperature, the defrosting heater 21 is stopped and the mode is switched to the normal mode or the silent mode.

  According to the present embodiment, when the temperature of the storage room such as the refrigerator compartment 2 or the freezer compartment 6 becomes higher than a predetermined temperature in the silent mode, the mode is switched to the normal mode, so that the cooling power is increased by increasing the rotational speed of the blowers 14, 18, 24. Can be made. Therefore, when the refrigerator compartment 2 and the freezer compartment 6 are at a low temperature, the rotational speed of the blowers 14, 18, and 24 is not increased, so that overcooling of stored items can be prevented and power saving can be achieved. In addition, when the refrigerator compartment 2 and the freezer compartment 6 reach a high temperature, the cooling power increases, preventing deterioration of stored items, and driving of the compressor 15 that consumes a large amount of power can be suppressed to save power.

  In addition, after maintaining the silent mode when the door of the storage room is opened, when the temperature of the storage room becomes higher than a predetermined temperature, the mode is switched to the normal mode. It will not be high. Therefore, it is possible to further reduce power consumption and to prevent overcooling of stored items.

  Further, since the silent mode is canceled based on the temperature of the inflow port 17a into which the refrigerant flows into the cooler 17 by the detection of the temperature sensor 28, the inflow port 17a of the cooler 17 becomes low temperature before exchanging heat with air. When there is a stick, the temperature difference from the freezer compartment 3 increases. For this reason, the frost formation of the cooler 17 can be detected at an early stage, and the progress of the frost formation can be stopped.

  In the present embodiment, the silent mode may be canceled by detecting the temperature of the inflow port 17a by the temperature sensor 16 that detects the temperature in the vicinity of the cooler 17. The detected temperature of the temperature sensor 16 is slightly higher than the temperature of the surface of the inlet 17a, but has a correlation. Therefore, the temperature of the inlet 17a can be obtained from the detected temperature of the temperature sensor 16 by calculation. Thereby, the temperature sensor 28 can be omitted and the number of parts can be reduced.

  Moreover, rotation of only the air blower 18 which contributes to circulation of the air which flows into the refrigerator compartment 2, the temperature switching room 3, the vegetable compartment 5, and the freezer compartment 6 by making the rotation speed of the air blowers 14 and 24 constant in a quiet mode and a normal mode. The number may be variable.

  ADVANTAGE OF THE INVENTION According to this invention, it can utilize for the refrigerator provided with the quiet mode which drive | operates the air blower which sends out cool air to a store room by rotation speed lower than usual.

The front view which shows the refrigerator of embodiment of this invention The side view which shows the refrigerator of embodiment of this invention Side surface sectional drawing which shows the refrigerator of embodiment of this invention Front sectional drawing which shows the principal part of the refrigerator of embodiment of this invention The figure explaining the transfer from the quiet mode of the refrigerator of embodiment of this invention to the defrost mode

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigeration room 3 Temperature switching room 4 Ice making room 5 Vegetable room 6 Freezer room 7, 8 Cold air passage 13 Temperature switching room discharge damper 14, 18, 24 Blower 15 Compressor 16, 28, 29, 30 Temperature sensor 17 Cooler 17a Inlet 20 Temperature switching chamber return damper 21 Defrost heater 22 Freezer chamber damper 25 Chilled chamber damper 26 Refrigeration chamber damper 27 Temperature switching chamber heater

Claims (6)

  A normal mode for cooling the storage chamber by driving the blower at a predetermined rotational speed, and a rotational speed lower than that of the normal mode. The refrigerator having a silent mode for cooling the storage chamber by being driven at a time, and switching to the normal mode when the temperature of the storage chamber becomes higher than a predetermined temperature in the silent mode.   The switch to the normal mode when the temperature of the storage room becomes higher than a predetermined temperature after maintaining the silent mode when the door of the storage room is opened in the silent mode. refrigerator.   The storage room includes a freezing room, and when the difference between the temperature of the cooler and the temperature of the freezing room becomes larger than a predetermined temperature in the silent mode, the cooler is heated by a defrosting heater and defrosted. The refrigerator according to claim 1 or 2, wherein the refrigerator is switched to a defrosting mode.   The storage room includes a freezing room, and switches to the normal mode when a difference between the temperature of the cooler and the temperature of the freezing room becomes larger than a first predetermined temperature in the silent operation mode, and the cooling in the normal mode. When the difference between the temperature of the cooler and the temperature of the storage chamber becomes larger than the second predetermined temperature that is higher than the first predetermined temperature, the cooler is heated by the defrosting heater to defrost. The refrigerator according to claim 1 or 2, wherein the refrigerator is switched.   5. The refrigerator according to claim 3, wherein the silent mode is canceled based on a temperature of an inlet through which the refrigerant flows into the cooler.   A temperature sensor for detecting the temperature in the vicinity of the cooler is provided, and when the temperature in the vicinity of the cooler becomes higher than a predetermined temperature by the detection of the temperature sensor, the defrosting heater is stopped and the temperature sensor is detected. The refrigerator according to claim 5, wherein the temperature of the inlet is detected based on temperature.

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