Refrigerator

Abstract

The present invention relates to a refrigerator. A refrigerator according to an embodiment of the present invention comprises a first storage room in which an article is stored, a cavity disposed inside the first storage room, a heat source that supplies heat into the cavity, a cold source that supplies cold air into the cavity, a means for preventing water contained in the article from freezing, and a control unit that controls the output of at least one of the heat source, the cold source, and the means for preventing water from freezing. The control unit controls the operation to perform a first operation step based on a first notch temperature for cooling operation of the first storage room, a second operation step based on a second notch temperature for heating operation of the first storage room, and a third operation step based on a third notch temperature for cooling operation of the first storage room, wherein the second notch temperature is a value higher than 0°C and the third notch temperature is a value lower than the first notch temperature. Accordingly, cold or hot air can be efficiently supplied until the supercooling maintenance section is reached.

Description

Technology Field

[0001] The present invention relates to a refrigerator, and more specifically, to a refrigerator capable of efficiently supplying cold air or heat until reaching a supercooling maintenance section. Background Technology

[0002] For the long-term storage of meat, fish, etc., the freezer compartment inside the refrigerator maintains a temperature of approximately -18°C.

[0003] Meanwhile, when cooking meat, fish, etc., frozen at a temperature of approximately -18°C, separate thawing is required. Accordingly, the frozen meat, fish, etc., are removed and thawed using a separate cooking device. However, there is the inconvenience of having to perform the thawing process through a different device.

[0004] Korean Published Patent Application No. 10-2008-0003218 (hereinafter referred to as Prior Art 1) discloses a supercooling device characterized by including a non-freezing chamber for storing food in a non-freezing supercooled state and an electrode for applying an electric field to the non-freezing chamber.

[0005] However, according to Prior Art 1, when current is applied, it operates as a heater, and accordingly, the internal temperature rises, causing the temperature of the load maintained at a low temperature to rise, and when current is not applied, it drops back to a low temperature, and there is a problem that the food storage period is not long due to repeated temperature changes.

[0006] In addition, depending on the operation of the heater, the temperature rise occurs only in the vicinity where the heater is placed, resulting in a problem where the temperature does not change evenly across the load.

[0007] Korean Registered Patent Publication No. 10-0756712 (hereinafter referred to as Prior Art 2) discloses a method for determining the release of supercooling of a refrigerator.

[0008] However, according to prior art 2, since a temperature sensor for measuring temperature must be placed inside a supercooling chamber to detect the temperature of an object, there is a problem that it is difficult to accurately detect the temperature of the object because, when using an electric or magnetic field, malfunctions of the temperature sensor and surrounding circuit elements occur.

[0009] In addition, according to prior art 2, there is no method to efficiently maintain supercooling, so there is a disadvantage that power consumption is significant. The problem to be solved

[0010] The objective of the present invention is to provide a refrigerator capable of efficiently supplying cold or hot air until reaching a supercooling maintenance section.

[0011] Another objective of the present invention is to provide a refrigerator capable of efficiently maintaining supercooling using an RF signal without the placement of a temperature sensing unit within the cavity.

[0012] Another objective of the present invention is to provide a refrigerator capable of efficiently supplying cold air in the second subcooling section among the first subcooling section and the second subcooling section.

[0013] Another objective of the present invention is to provide a refrigerator capable of stably securing a supercooling section using an RF signal. means of solving the problem

[0014] A refrigerator according to an embodiment of the present invention for achieving the above objective comprises a first storage room in which an article is stored, a cavity disposed inside the first storage room, a heat source that supplies heat into the cavity, a cold source that supplies cold air into the cavity, a means for preventing water contained in the article from freezing, and a control unit that controls the output of at least one of the heat source, the cold source, and the means for preventing water from freezing. The control unit controls the operation to perform a first operation step based on a first notch temperature for cooling operation of the first storage room, a second operation step based on a second notch temperature for heating operation of the first storage room, and a third operation step based on a third notch temperature for cooling operation of the first storage room, wherein the second notch temperature is a value higher than 0°C and the third notch temperature is a value lower than the first notch temperature.

[0015] Meanwhile, the cold source may include an evaporator that performs heat exchange using refrigerant compressed in a compressor.

[0016] Meanwhile, the cold source may include a fan operated to supply cold air generated by heat exchange in the evaporator to the first storage room.

[0017] Meanwhile, the cold source may include the heat-absorbing surface of the thermoelectric element.

[0018] Meanwhile, the cold source may further include a fan that operates to supply cold air generated by heat exchange at the heat-absorbing surface of the thermoelectric element to the cavity.

[0019] Meanwhile, the heat source may include at least one of a heater and an RF output device.

[0020] Meanwhile, the means for interfering with water molecule freezing may include at least one of an RF output device, an electric field output device, a magnetic field output device, and an ultrasonic output device.

[0021] Meanwhile, the operating mode of the first storage room is variable, and the operating mode may include at least one of a refrigeration operating mode, a supercooling operating mode, and a defrosting mode.

[0022] Meanwhile, the notch temperature of the first storage room in the refrigeration operation mode may be higher than the notch temperature of the first storage room in the supercooling operation mode.

[0023] Meanwhile, in the refrigeration operation mode, the notch temperature of the first storage room may be lower than the notch temperature of the first storage room in the heating operation mode.

[0024] Meanwhile, the refrigerator according to an embodiment of the present invention may further include a second storage room disposed on the outside of the first storage room.

[0025] Meanwhile, the notch temperature of the second storage room may be higher than the notch temperature for cooling operation of the first storage room.

[0026] Meanwhile, the refrigerator according to an embodiment of the present invention further includes a third storage room, and the notch temperature for the third storage room may be lower than the notch temperature for cooling operation of the first storage room.

[0027] Meanwhile, the control unit can control the output of the water molecule freezing inhibition means to be greater during the second operation stage than during the first operation stage.

[0028] Meanwhile, when the first operation stage is being performed, the output of the water molecule freezing inhibition means may be zero.

[0029] Meanwhile, the control unit can control the output of the water molecule freezing inhibition means so that it becomes greater or equal during the third operation step than during the first operation step.

[0030] Meanwhile, the control unit can control the operation so that a fourth operation step is further performed based on the fourth notch temperature for the heating operation of the first storage room.

[0031] Meanwhile, the fourth notch temperature may be a value higher than 0℃.

[0032] Meanwhile, the control unit can control the temperature of the fourth notch to be higher than the temperature of the second notch if the time elapsed from the point in time when the operating start condition of the second operating stage is satisfied until the point in time when the operating end condition of the second operating stage is satisfied exceeds a predetermined range.

[0033] Meanwhile, the control unit can control the fourth notch temperature and the second notch temperature to be the same if the time elapsed from the point in time when the operation start condition of the second operation stage is satisfied until the point in time when the operation end condition of the second operation stage is satisfied is within a predetermined range.

[0034] Meanwhile, the control unit can control the temperature of the fourth notch to be lower than the temperature of the second notch if the time elapsed from the point in time when the operating start condition of the second operating stage is satisfied until the point in time when the operating end condition of the second operating stage is satisfied is less than a predetermined range.

[0035] Meanwhile, the control unit can control the temperature of the first storage room to be higher than the temperature of the second notch if the temperature of the first storage room exceeds a predetermined range from the time when the operating start condition of the second operating stage is satisfied to the time when the operating end condition of the second operating stage is satisfied.

[0036] Meanwhile, the control unit can control the temperature of the first storage room to be the same as the temperature of the fourth notch and the second notch if the temperature of the first storage room is within a predetermined range from the time when the operating start condition of the second operating stage is satisfied to the time when the operating end condition of the second operating stage is satisfied.

[0037] Meanwhile, the control unit can control the temperature of the first storage room to be lower than the second notch temperature if the temperature of the first storage room is below a predetermined range from the time when the operation start condition of the second operation stage is satisfied to the time when the operation end condition of the second operation stage is satisfied.

[0038] A refrigerator according to another embodiment of the present invention for achieving the above objective comprises: a first storage room in which an article is stored; a cavity disposed inside the first storage room; a heat source that supplies heat into the cavity; a cold source that supplies cold air into the cavity; a means for preventing water contained in the article from freezing; and a control unit that controls the output of at least one of the heat source, the cold source, and the means for preventing water from freezing. The control unit controls the operation to perform a first operation step based on a first notch temperature for cooling operation of the first storage room, a second operation step based on a second notch temperature for heating operation of the first storage room, and a third operation step based on a third notch temperature for cooling operation of the first storage room, wherein the total amount of cold air supplied to the first storage room in the third operation step is greater than the total amount of cold air supplied to the first storage room in the first operation step. Controls.

[0039] A refrigerator according to another embodiment of the present invention for achieving the above objective comprises a cavity disposed within a supercooling chamber and having an article placed therein, an inlet temperature sensing unit for sensing the inlet temperature of the cavity, an outlet temperature sensing unit for sensing the outlet temperature of the cavity, a cold air supply device for supplying or blocking cold air to the cavity, a hot air supply device for supplying or blocking hot air into the cavity, and a control unit for controlling the cold air supply device and the hot air supply device. The hot air supply device comprises an RF output device for outputting an RF signal into the cavity. The control unit controls the supply of cold air into the cavity during a first period, and when the supercooling state of the article is released, controls the supply of hot air into the cavity during a second period after the first period, and when the thawing of the article is finished, controls the supply of cold air to the cavity and the supply of hot air into the cavity during a third period after the second period, and controls the amount of cold air during the third period to be smaller than the amount of cold air during the first period.

[0040] Meanwhile, during the first section, the temperature of the article is sequentially lowered to a first temperature, which is a supercooling set temperature; during the second section, the temperature of the article is raised from the first temperature to a second temperature, which is a thawing completion temperature; and during the third section, the temperature of the article can be lowered from the second temperature to a third temperature, which is higher than the first temperature.

[0041] Meanwhile, the control unit can control the supply of heat into the cavity by using the RF signal output by operating the RF output device.

[0042] Meanwhile, the control unit can control the temperature of the item to be maintained within a predetermined range based on the third temperature during the fourth section following the third section.

[0043] Meanwhile, the control unit controls the supply of heat into the cavity during the fourth section and can control the repeated supply and off of heat.

[0044] Meanwhile, the control unit can control the first heat supply period of the fourth section to be longer than the remaining heat supply period.

[0045] Meanwhile, the control unit can control so that cold air is not supplied into the cavity during the second section.

[0046] Meanwhile, the control unit can control the supply of heat to the cavity during the first section to be smaller than the amount of heat during the second section.

[0047] Meanwhile, the control unit can control the magnitude of the rate of change of the item's temperature during the third period to be smaller than the magnitude of the rate of change of the item's temperature during the first period.

[0048] Meanwhile, the control unit can control the heat level during the third section to be smaller than the heat level during the second section.

[0049] Meanwhile, the cold air supply device may include a fan placed at the entrance of the cavity.

[0050] Meanwhile, the supercooling chamber may further include a partition separating the inlet of the supercooling chamber and the outlet of the supercooling chamber.

[0051] Meanwhile, the control unit can control the supply of cold air to the cavity by controlling the on / off of the fan.

[0052] Meanwhile, the cold air supply device may further include a cold air supply duct that supplies cold air to the inlet of the subcooling chamber and a damper that operates to supply cold air to the cold air supply duct.

[0053] Meanwhile, the control unit can control the supply of cold air supplied to the subcooling chamber by controlling the opening rate of the damper.

[0054] Meanwhile, when the subcooling chamber is placed in the refrigerator, the cold air supply device may further include a cold air supply duct in the freezer that supplies cold air to the inlet of the subcooling chamber, and a cold air recovery duct in the freezer that recovers cold air from the outlet of the subcooling chamber.

[0055] Meanwhile, the control unit may determine that the supercooling state of the article has been released if the first rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity when the fan is operating, is greater than or equal to the first reference value, and the second rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity when the fan is off, is greater than or equal to the second reference value.

[0056] Meanwhile, the control unit may determine that the thawing of the product has ended when the difference between the outlet temperature and the inlet temperature of the cavity when the fan is off is greater than zero, and the second rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity when the fan is off, is greater than or equal to the second reference value.

[0057] A refrigerator according to another embodiment of the present invention for achieving the above objective comprises a cavity disposed within a supercooling chamber and having an article placed therein, an inlet temperature sensing unit for sensing the inlet temperature of the cavity, an outlet temperature sensing unit for sensing the outlet temperature of the cavity, a cold air supply device for supplying or blocking cold air to the cavity, an RF output device for outputting an RF signal into the cavity, and a control unit for controlling the cold air supply device and the hot air supply device. The control unit controls the supply of cold air into the cavity during a first period, and when the supercooling state of the article is released, controls the supply of an RF signal into the cavity during a second period after the first period, and when the thawing of the article is finished, controls the supply of cold air to the cavity and the supply of an RF signal into the cavity during a third period after the second period, and controls the size of the cold air during the third period to be smaller than the size of the cold air during the first period.

[0058] Meanwhile, the control unit can control the supply and off of the RF signal repeatedly so that the temperature of the item is maintained within a predetermined range based on the third temperature during the fourth section after the third section.

[0059] A refrigerator according to another embodiment of the present invention for achieving the above objective comprises a cavity disposed within a supercooling chamber and having an article placed therein, an inlet temperature sensing unit for sensing the inlet temperature of the cavity, an outlet temperature sensing unit for sensing the outlet temperature of the cavity, a cold air supply device for supplying or blocking cold air to the cavity, a hot air supply device for supplying or blocking hot air into the cavity, and a control unit for controlling the cold air supply device and the hot air supply device. The hot air supply device comprises an RF output device for outputting an RF signal into the cavity. The control unit controls the supply of cold air into the cavity during a first period, and when the supercooling state of the article is released, controls the supply of hot air into the cavity during a second period after the first period, and when the thawing of the article is finished, controls the supply of cold air to the cavity and the supply of hot air into the cavity during a third period after the second period, and controls the amount of cold air during the third period to be greater than the amount of cold air during the first period.

[0060] Meanwhile, during the first section, the temperature of the article is sequentially lowered to a first temperature, which is a supercooling set temperature; during the second section, the temperature of the article is raised from the first temperature to a second temperature, which is a thawing completion temperature; and during the third section, the temperature of the article can be lowered from the second temperature to a third temperature, which is higher than the first temperature.

[0061] Meanwhile, the control unit can control the supply of heat into the cavity by using the RF signal output by operating the RF output device.

[0062] Meanwhile, the control unit can control the temperature of the item to be maintained within a predetermined range based on the third temperature during the fourth section following the third section.

[0063] Meanwhile, the control unit controls the supply of heat into the cavity during the fourth section and can control the repeated supply and off of heat.

[0064] Meanwhile, the control unit can control the first heat supply period of the fourth section to be longer than the remaining heat supply period.

[0065] Meanwhile, the control unit can control so that cold air is not supplied into the cavity during the second section.

[0066] Meanwhile, the control unit can control the supply of heat to the cavity during the first section to be smaller than the amount of heat during the second section.

[0067] Meanwhile, the control unit can control the magnitude of the rate of change of the item's temperature during the third period to be greater than the magnitude of the rate of change of the item's temperature during the first period.

[0068] Meanwhile, the control unit can control the heat level during the third section to be smaller than the heat level during the second section.

[0069] Meanwhile, the cold air supply device may include a fan placed at the entrance of the cavity.

[0070] Meanwhile, the supercooling chamber may further include a partition separating the inlet of the supercooling chamber and the outlet of the supercooling chamber.

[0071] Meanwhile, the control unit can control the supply of cold air to the cavity by controlling the on / off of the fan.

[0072] Meanwhile, the cold air supply device may further include a cold air supply duct that supplies cold air to the inlet of the subcooling chamber and a damper that operates to supply cold air to the cold air supply duct.

[0073] Meanwhile, the control unit can control the supply of cold air supplied to the subcooling chamber by controlling the opening rate of the damper.

[0074] Meanwhile, when the subcooling chamber is placed in the refrigerator, the cold air supply device may further include a cold air supply duct in the freezer that supplies cold air to the inlet of the subcooling chamber, and a cold air recovery duct in the freezer that recovers cold air from the outlet of the subcooling chamber.

[0075] Meanwhile, the control unit may determine that the supercooling state of the article has been released if the first rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity when the fan is operating, is greater than or equal to the first reference value, and the second rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity when the fan is off, is greater than or equal to the second reference value.

[0076] Meanwhile, the control unit may determine that the thawing of the product has ended when the difference between the outlet temperature and the inlet temperature of the cavity when the fan is off is greater than zero, and the second rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity when the fan is off, is greater than or equal to the second reference value.

[0077] A refrigerator according to another embodiment of the present invention for achieving the above objective comprises a cavity disposed within a supercooling chamber and having an article placed therein, an inlet temperature sensing unit for sensing the inlet temperature of the cavity, an outlet temperature sensing unit for sensing the outlet temperature of the cavity, a cold air supply device for supplying or blocking cold air to the cavity, an RF output device for outputting an RF signal into the cavity, and a control unit for controlling the cold air supply device and the hot air supply device. The control unit controls the supply of cold air into the cavity during a first period, and when the supercooling state of the article is released, controls the supply of an RF signal into the cavity during a second period after the first period, and when the thawing of the article is finished, controls the supply of cold air to the cavity and the supply of an RF signal into the cavity during a third period after the second period, and controls the amount of cold air during the third period to be greater than the amount of cold air during the first period.

[0078] Meanwhile, the control unit can control the supply and off of the RF signal repeatedly so that the temperature of the item is maintained within a predetermined range based on the third temperature during the fourth section after the third section. Effects of the invention

[0079] A refrigerator according to an embodiment of the present invention comprises a first storage room in which an article is stored, a cavity disposed inside the first storage room, a heat source that supplies heat into the cavity, a cold source that supplies cold air into the cavity, a means for preventing water contained in the article from freezing, and a control unit that controls the output of at least one of the heat source, the cold source, and the means for preventing water from freezing. The control unit controls the operation to perform a first operation step based on a first notch temperature for cooling operation of the first storage room, a second operation step based on a second notch temperature for heating operation of the first storage room, and a third operation step based on a third notch temperature for cooling operation of the first storage room, wherein the second notch temperature is a value higher than 0°C and the third notch temperature is a value lower than the first notch temperature. Accordingly, cold or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0080] Meanwhile, the operating mode of the first storage room is variable, and the operating mode may include at least one of a refrigeration operating mode, a supercooling operating mode, and a defrosting mode. Accordingly, cold air or hot air can be efficiently supplied until a supercooling maintenance section is reached.

[0081] Meanwhile, the notch temperature of the first storage chamber in the refrigeration operation mode may be higher than the notch temperature of the first storage chamber in the supercooling operation mode. Accordingly, cold air or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0082] Meanwhile, the notch temperature of the first storage chamber in the refrigeration operation mode may be lower than the notch temperature of the first storage chamber in the heating operation mode. Accordingly, cold air or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0083] Meanwhile, the notch temperature of the second storage room may be higher than the notch temperature for cooling operation of the first storage room. Accordingly, cold or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0084] Meanwhile, a refrigerator according to an embodiment of the present invention further includes a third storage room, and the notch temperature for the third storage room may be lower than the notch temperature for cooling operation of the first storage room. Accordingly, cold air or hot air can be efficiently supplied until a supercooling maintenance section is reached.

[0085] Meanwhile, the control unit can control the output of the water molecule freezing inhibition means to be greater during the second operation stage than during the first operation stage. Accordingly, the power consumption by the water molecule freezing inhibition means can be reduced during the first operation stage.

[0086] Meanwhile, when the first operation stage is being performed, the output of the water molecule freezing inhibition means may be zero. Accordingly, the power consumption by the water molecule freezing inhibition means can be reduced.

[0087] Meanwhile, the control unit can control the output of the water molecule freezing inhibition means so that it is greater than or equal to the output during the third operation stage than during the first operation stage. Accordingly, the power consumption by the water molecule freezing inhibition means can be reduced during the first operation stage.

[0088] Meanwhile, the control unit can control the operation so that a fourth operation step is further performed based on the fourth notch temperature for the heating operation of the first storage room. Accordingly, the thawing mode can be performed.

[0089] Meanwhile, the control unit can control the temperature of the fourth notch to be higher than the temperature of the second notch if the time elapsed from the point in time when the operating start condition of the second operating stage is satisfied until the operating end condition of the second operating stage is satisfied exceeds a predetermined range. Accordingly, cold air or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0090] Meanwhile, the control unit can control the fourth notch temperature and the second notch temperature to be the same if the time elapsed from the point in time when the operation start condition of the second operation stage is satisfied until the operation end condition of the second operation stage is satisfied is within a predetermined range. Accordingly, cold air or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0091] Meanwhile, the control unit can control the temperature of the fourth notch to be lower than the temperature of the second notch if the time elapsed from the point in time when the operating start condition of the second operating stage is satisfied until the operating end condition of the second operating stage is satisfied is less than a predetermined range. Accordingly, cold air or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0092] Meanwhile, the control unit can control the temperature of the first storage room to be higher than the temperature of the second notch if the temperature of the first storage room exceeds a predetermined range from the time when the operating start condition of the second operating stage is satisfied to the time when the operating end condition of the second operating stage is satisfied. Accordingly, cold air or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0093] Meanwhile, the control unit can control the temperature of the first storage room to be equal to the temperature of the fourth notch and the temperature of the second notch if the temperature of the first storage room is within a predetermined range from the time when the operating start condition of the second operating stage is satisfied to the time when the operating end condition of the second operating stage is satisfied. Accordingly, cold air or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0094] Meanwhile, the control unit can control the temperature of the first storage room to be lower than the temperature of the second notch if the temperature of the first storage room is below a predetermined range from the time when the operating start condition of the second operating stage is satisfied to the time when the operating end condition of the second operating stage is satisfied. Accordingly, cold air or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0095] A refrigerator according to another embodiment of the present invention for achieving the above objective comprises: a first storage room in which an article is stored; a cavity disposed inside the first storage room; a heat source that supplies heat into the cavity; a cold source that supplies cold air into the cavity; a means for preventing water contained in the article from freezing; and a control unit that controls the output of at least one of the heat source, the cold source, and the means for preventing water from freezing. The control unit controls the operation to perform a first operation step based on a first notch temperature for cooling operation of the first storage room, a second operation step based on a second notch temperature for heating operation of the first storage room, and a third operation step based on a third notch temperature for cooling operation of the first storage room, wherein the total amount of cold air supplied to the first storage room in the third operation step is greater than the total amount of cold air supplied to the first storage room in the first operation step. Controls. Accordingly, it becomes possible to efficiently supply cold or hot air until the supercooling maintenance section is reached.

[0096] A refrigerator according to another embodiment of the present invention for achieving the above objective comprises: a first storage chamber in which an article is stored; a cavity disposed inside the first storage chamber; a heat source that supplies heat into the cavity; a cold source that supplies cold air into the cavity; a water molecule freezing inhibitor that prevents water contained in the article from freezing; and a control unit that controls the output of at least one of the heat source, the cold source, and the water molecule freezing inhibitor. The control unit controls the operation to perform a first operation step based on a first notch temperature for cooling operation of the first storage chamber, a second operation step based on a second notch temperature for heating operation of the first storage chamber, and a third operation step based on a third notch temperature for cooling operation of the first storage chamber. In the third operation step, the output of the water molecule freezing inhibitor is controlled to be greater than or equal to the output of the water molecule freezing inhibitor in the first operation step. Accordingly, cold or hot air can be efficiently supplied until the supercooling maintenance section is reached. Brief explanation of the drawing

[0097] FIG. 1 is a perspective view illustrating a refrigerator according to an embodiment of the present invention. Figure 2 is a perspective view of the refrigerator of Figure 1 with the door opened. Figure 3 is a diagram briefly illustrating the configuration of the refrigerator of Figure 1. FIG. 4a is an example of a block diagram briefly illustrating the interior of the refrigerator shown in FIG. 1. FIG. 4b is another example of a block diagram briefly illustrating the interior of the refrigerator shown in FIG. 1. FIG. 5a is a drawing illustrating an example of an RF output device, which is an example of a heat supply device of FIG. 4a. FIG. 5b is a drawing illustrating another example of an RF output device, which is an example of a heat supply device of FIG. 4a. Figure 6 is a block diagram showing the interior of an RF drive unit, which is an example of a heat supply drive unit of Figure 4a. FIGS. 7a to 7d are drawings illustrating a cavity in a supercooling chamber according to an embodiment of the present invention. Figure 8a is a graph showing the change in water temperature when no RF signal is output. Figure 8b is a graph showing the change in water temperature depending on the presence or absence of an RF signal. FIG. 9 is a flowchart illustrating the operation method of a refrigerator according to an embodiment of the present invention. FIG. 10a is a flowchart illustrating a method of operation of a refrigerator according to another embodiment of the present invention. FIG. 10b is a flowchart illustrating a method of operation of a refrigerator according to another embodiment of the present invention. FIG. 11 is a flowchart illustrating a method of operation of a refrigerator according to another embodiment of the present invention. FIGS. 12 to 20 are drawings referenced in the explanation of the operation method of FIGS. 10a to 11. Specific details for implementing the invention

[0098] The present invention will be described in more detail below with reference to the drawings.

[0099] The suffixes "module" and "part" for components used in the following description are assigned solely for the ease of drafting this specification and do not inherently confer any particularly significant meaning or role. Accordingly, the terms "module" and "part" may be used interchangeably.

[0100] FIG. 1 is a perspective view illustrating a refrigerator according to an embodiment of the present invention.

[0101] Referring to the drawings, a refrigerator (100) according to one embodiment of the present invention has a case (110) having an internal space partitioned into a freezer room (RMF) and a refrigerator room (RMR), and a freezer door (120) that shields the freezer room (RMF) and a refrigerator door (140) that shields the refrigerator room (RMR), and the general exterior is formed by these.

[0102] Additionally, a door handle (121) protruding forward is further provided on the front of the freezer door (120) and the refrigerator door (140), so that the user can easily grasp and rotate the freezer door (120) and the refrigerator door (140).

[0103] Meanwhile, a home bar (170) may be further provided on the front of the refrigerator door (140) as a convenience means to allow the user to take out stored items, such as beverages contained inside, without opening the refrigerator door (140).

[0104] Additionally, a dispenser (160) may be provided on the front of the freezer door (120) as a convenience means to allow the user to easily take out ice or drinking water without opening the freezer door (120), and a control panel (210) may be further provided on the upper side of the dispenser (160) to control the operation of the refrigerator (100) and display the status of the refrigerator (100) in operation on a screen.

[0105] Meanwhile, in the drawing, the dispenser (160) is shown as being placed in front of the freezer door (120), but is not limited thereto, and it is also possible to place it in front of the refrigerator door (140).

[0106] Meanwhile, a supercooling chamber (OCRa) can be placed in the upper or lower inner part of the freezer (RMF) to maintain the freshness of the product without freezing by utilizing the cold air of the freezer.

[0107] Alternatively, it is also possible to place an OCRb (OCRb) in the upper or lower inner part of the refrigerator room (RMR) so that the items can be kept fresh without freezing by using the cold air from the freezer or refrigerator room.

[0108] Meanwhile, the supercooling chamber (OCRa or OCRb) in the present invention is used for a supercooling state in which the article does not change into a solid and maintains a liquid state while cold air is supplied at a temperature below 0°C, for example, a temperature at which a phase change from liquid to solid occurs.

[0109] The control panel (210) may include an input section (220) composed of multiple buttons, and a display section (230) that displays a control screen and operating status, etc.

[0110] The display unit (230) displays information such as a control screen, operating status, and internal temperature. For example, the display unit (230) can display the set temperature of the freezer compartment and the set temperature of the refrigerator compartment.

[0111] This display unit (230) can be implemented in various ways, such as a liquid crystal display (LCD), a light-emitting diode (LED), or an organic light-emitting diode (OLED). Additionally, the display unit (230) may be implemented as a touch screen capable of performing the function of an input unit (220).

[0112] The input unit (220) may be equipped with a plurality of operation buttons. For example, the input unit (220) may include a freezer temperature setting button (not shown) for setting the freezer temperature and a refrigerator temperature setting button (not shown) for setting the freezer temperature. Meanwhile, the input unit (220) may be implemented as a touch screen capable of performing the function of the display unit (230).

[0113] Meanwhile, the refrigerator according to the embodiment of the present invention is not limited to the double door type shown in the drawing, and regardless of its form, such as a one door type, sliding door type, or curtain door type, it is sufficient that an RF output device (190a) that outputs an RF signal is placed inside the freezer compartment as described below.

[0114] Figure 2 is a perspective view of the refrigerator of Figure 1 with the door opened.

[0115] Referring to the drawing, a freezer room (RMF) is placed on the inside of the freezer door (120), and a refrigerator room (RMR) is placed on the inside of the refrigerator door (140).

[0116] A supercooling chamber (OCRa) can be placed in the lower inner part of the freezer (RMF) to maintain the freshness of the items without freezing by utilizing the cold air of the freezer.

[0117] In the drawing, an example is shown in which a supercooling chamber (OCRa) is placed in the inner lower space of a freezer room (RMF). It is not limited to this and can be placed in various locations.

[0118] Figure 3 is a diagram briefly illustrating the configuration of the refrigerator of Figure 1.

[0119] Referring to the drawing, the refrigerator (100) may include a compressor (112), a condenser (116) that condenses the refrigerant compressed by the compressor (112), a freezer evaporator (122) that receives and evaporates the refrigerant condensed by the condenser (116) and is placed in a freezer room (RMF), and a freezer expansion valve (132) that expands the refrigerant supplied to the freezer evaporator (122).

[0120] Meanwhile, although the drawing illustrates the use of a single evaporator, it is also possible to use separate evaporators for the refrigerator and freezer compartments.

[0121] That is, the refrigerator (100) may further include a refrigerator room evaporator (not shown) placed in the refrigerator room (not shown), a three-way valve (not shown) that supplies refrigerant condensed in the condenser (116) to the refrigerator room evaporator (not shown) or the freezer room evaporator (122), and a refrigerator room expansion valve (not shown) that expands the refrigerant supplied to the refrigerator room evaporator (not shown).

[0122] Additionally, the refrigerator (100) may further include a gas-liquid separator (not shown) in which the refrigerant passing through the evaporator (122) is separated into liquid and gas.

[0123] Additionally, the refrigerator (100) may further include a refrigerator fan (not shown) and a freezer fan (144) that suck in cold air passing through the freezer evaporator (122) and blow it into the refrigerator (not shown) and freezer (RMF), respectively.

[0124] Additionally, it may further include a compressor drive unit (113) for driving the compressor (112), a refrigerator fan drive unit (not shown) for driving the refrigerator fan (not shown) and the freezer fan (144), and a freezer fan drive unit (145).

[0125] Meanwhile, according to the drawing, a common evaporator (122) is used in the refrigerator and freezer rooms. In this case, a damper (not shown) may be installed between the refrigerator and freezer rooms, and a fan (not shown) may force air to supply cold air generated from one evaporator to the freezer and refrigerator rooms.

[0126] FIG. 4a is an example of a block diagram briefly illustrating the interior of the refrigerator shown in FIG. 1.

[0127] Referring to the drawings, the refrigerator (100) of FIG. 4a includes a compressor (112), a machine room fan (115), a freezer room fan (144), a control unit (310), a heater (330), an RF output device (190a), a temperature sensing unit (320), and a memory (240).

[0128] Additionally, the refrigerator may further include a compressor drive unit (113), a machine room fan drive unit (117), a freezer room fan drive unit (145), a heater drive unit (332), a cold air supply drive unit (185), a cold air supply device (180), a hot air supply drive unit (195), a hot air supply device (190), a display unit (230), and an input unit (220).

[0129] Refer to FIG. 2 for a description of the compressor (112), machine room fan (115), and freezer room fan (144).

[0130] The input unit (220) is equipped with a plurality of operation buttons and transmits a signal for the input freezer setting temperature or refrigerator setting temperature to the control unit (310).

[0131] The display unit (230) can display the operating status of the refrigerator. Meanwhile, the display unit (230) can be operated by the control of a display control unit (not shown).

[0132] The memory (240) can store data necessary for refrigerator operation.

[0133] For example, the memory (240) can store power consumption information for each of the plurality of power consumption units. And, the memory (240) can output the corresponding power consumption information to the control unit (310) depending on whether each power consumption unit in the refrigerator is operating.

[0134] The temperature sensing unit (320) detects the temperature inside the refrigerator and transmits a signal regarding the detected temperature to the control unit (310). Here, the temperature sensing unit (320) detects the temperature of the refrigerator room and the temperature of the freezer room, respectively. In addition, it may also detect the temperature of each room within the refrigerator room or each room within the freezer room.

[0135] Meanwhile, the temperature sensing unit (320) can detect the temperature inside the supercooling chamber (OCR). Specifically, it may be equipped with an inlet temperature sensing unit (Tsi) that detects the inlet temperature of the cavity (CAV) inside the supercooling chamber (OCR) and an outlet temperature sensing unit (Tso) that detects the outlet temperature of the cavity (CAV).

[0136] The control unit (310) can control the compressor drive unit (113), fan drive unit (117 or 145), cold air supply drive unit (185), and hot air supply drive unit (195) as shown in the drawing to control the on / off operation of the compressor (112), fan (115 or 144), cold air supply device (180), and hot air supply device (190), and finally control the compressor (112), fan (115 or 144), cold air supply device (180), and hot air supply device (190). Here, the fan drive unit may be a machine room fan drive unit (117) or a freezer room fan drive unit (145).

[0137] For example, the control unit (310) can output a corresponding speed command signal to the compressor drive unit (113) or the fan drive unit (117 or 145), respectively.

[0138] The above-described compressor drive unit (113) and freezer fan drive unit (145) are each equipped with a compressor motor (not shown) and a freezer fan motor (not shown), respectively, and each motor (not shown) can be operated at a target rotational speed according to the control of the control unit (310).

[0139] Meanwhile, the machine room fan drive unit (117) is equipped with a machine room fan motor (not shown), and the machine room fan motor (not shown) can be operated at a target rotational speed under the control of the control unit (310).

[0140] If such a motor is a three-phase motor, it may be controlled by switching operations within an inverter (not shown) or constant speed control using AC power as is. Here, each motor (not shown) may be any one of an induction motor, a BLDC (Blushless DC) motor, or a synRM (synchronous reluctance motor).

[0141] Meanwhile, the control unit (310) can control the operation of the refrigerator (100) in addition to controlling the operation of the compressor (112) and the fan (115 or 144) as described above.

[0142] For example, the control unit (310) can control the overall operation of the refrigerant cycle in accordance with the set temperature from the input unit (220) as described above. For example, in addition to the compressor drive unit (113), refrigerator room fan drive unit (143) and freezer room fan drive unit (145), it can further control a three-way valve (not shown), a refrigerator room expansion valve (not shown), and a freezer room expansion valve (132). In addition, it can also control the operation of the condenser (116). In addition, the control unit (310) can also control the operation of the display unit (230).

[0143] Meanwhile, the heater (330) may be a freezer defrosting heater. The freezer defrosting heater (330) may be operated to remove frost attached to the freezer evaporator (122). To this end, the heater driving unit (332) may control the operation of the heater (330). Meanwhile, the control unit (310) may control the heater driving unit (332).

[0144] Meanwhile, the control unit (310) can output each driving signal to the cold air supply driving unit (185) and the hot air supply driving unit (195) for controlling the cold air supply device (180) and the hot air supply device (190).

[0145] Accordingly, the cold air supply device (180) or the hot air supply device (190) is operated, and cold air or hot air can be supplied into the supercooling chamber (OCR).

[0146] In particular, based on the operation of the cold air supply device (180) or the hot air supply device (190), it is possible to maintain a supercooled state for the freshness of the article in the supercooling chamber (OCR).

[0147] FIG. 4b is another example of a block diagram briefly illustrating the interior of the refrigerator shown in FIG. 1.

[0148] Referring to the drawings, the refrigerator (100b) of FIG. 4b includes, similar to FIG. 4a, a compressor (112), a machine room fan (115), a freezer room fan (144), a control unit (310), a temperature sensing unit (320), and a memory (240).

[0149] However, unlike FIG. 4a, the refrigerator (100b) of FIG. 4b differs in that it is equipped with a heat source (HS), a cold source (CS), and a water molecule freezing prevention means (WPF).

[0150] The heat source (HS) may include at least one of a heater (330 in FIG. 4a) and an RF output device (190a in FIG. 4a).

[0151] Meanwhile, the heat source (HS) may include the heat supply device (190) of FIG. 4a.

[0152] Meanwhile, the cold source (CS) may include an evaporator (122) that performs heat exchange using refrigerant compressed in a compressor (112).

[0153] Alternatively, the cold source (CS) may include a fan operated to supply cold air generated by heat exchange in the evaporator (122) to the first storage room (OCR).

[0154] Alternatively, the cold source (CS) may include the heat-absorbing surface of the thermoelectric element.

[0155] Alternatively, the cold source (CS) may further include a fan (FAa in FIG. 15) that operates to supply cold air generated by heat exchange at the heat-absorbing surface of the thermoelectric element to the cavity (CAV).

[0156] Alternatively, the cold source (CS) may be equipped with the cold supply device (180) of FIG. 4a.

[0157] Meanwhile, the water molecule freezing interruption means (WPF) may include at least one of an RF output device (190a in FIG. 4a), an electric field output device, a magnetic field output device, and an ultrasonic output device.

[0158] FIG. 5a is a drawing illustrating an example of an RF output device, which is an example of a heat supply device of FIG. 4a.

[0159] Referring to the drawing, the RF output device (190a1) may include a first plate (AND) and a second plate (CAT) disposed inside or outside the cavity (CAV).

[0160] The first plate (AND) and the second plate (CAT) may be spaced apart from each other and placed at the upper and lower portions of the cavity (CAV), respectively, and the first plate (AND) may be electrically connected to the RF signal transmission unit ((312).

[0161] Meanwhile, when an article (MAT) is positioned on the second plate (CAT) or within the cavity (CAV), if an electrical signal is applied to at least one of the first plate (AND) and the second plate (CAT), an RF signal (RFa) can be output to the article (MAT) inside the cavity (CAV).

[0162] Meanwhile, unlike the drawing, the first plate (AND) and the second plate (CAT) may be spaced apart from each other on the side of the cavity (CAV).

[0163] Meanwhile, the drawing illustrates that a door (DOR) is positioned on the side of the cavity (CAV). The door (DOR) can be opened and closed by rotating or by moving in one direction.

[0164] Meanwhile, it is preferable that the RF signal output from the RF output device (190a1) be output when the door (DOR) is closed. To this end, the RF output device (190a1) may further be equipped with a door opening / closing detection sensor that detects whether the door (DOR) is open or closed.

[0165] Meanwhile, the RF signal transmission unit (312) can be connected to the RF driving unit (195a). The RF driving unit (195a) can be controlled by the control unit (310).

[0166] Meanwhile, the control unit (310) can control the RF output device (190a1) to operate in at least the second section (P2aaa) among the first section (P1aa) in which the temperature of the article (MAT) in the cavity (CAV) sequentially decreases to a first temperature (T1aa) which is a supercooling set temperature, the second section (P2aaa) in which the temperature of the article (MAT) increases from the first temperature (T1aa) to a second temperature (T2aa) which is a melting completion temperature, and the third section (P3aa) in which the temperature of the article (MAT) decreases from the second temperature (T2aa) to a third temperature (T3aa) which is higher than the first temperature (T1aa).

[0167] Meanwhile, the first section (P1aa) can be named the first supercooling section, the second section (P2aaa) can be named the melting section, and the third section (P3aa) can be named the second supercooling section.

[0168] Meanwhile, the control unit (310) can control the RF output device (190a) to operate during the first section (P1aa) or the third section (P3aa) in addition to the second section (P2aaa).

[0169] Accordingly, the freshness of the item (MAT) inside the refrigerator (100) can be maintained using an RF signal. In particular, the movement of water molecules within the item (MAT) by the RF signal is activated, thereby preventing the item (MAT) from freezing and maintaining its freshness.

[0170] Meanwhile, the control unit (310) can control the first section (P1aa) to become longer, the start time of the second section (P2aa) to become delayed, or the second section (P2aa) to become longer as the power of the RF signal output from the RF output device (190a1) increases. Accordingly, the freshness of the items (MAT) inside the refrigerator (100) can be maintained using the RF signal.

[0171] Meanwhile, the control unit (310) can output an RF signal to the item (MAT) in the cavity (CAV) to control the third section (P3aa) in which the temperature of the item (MAT) decreases after the second section (P2aa). Accordingly, the item (MAT) can be frozen while maintaining its freshness.

[0172] Meanwhile, when the RF output device (190a1) is operated, cold air (FAr) from the cooling chamber (FRM) can be supplied into the cavity (CAV). Accordingly, the freshness of the item (MAT) inside the refrigerator (100) can be maintained using the RF signal, and the item (MAT) can be maintained in a supercooled state.

[0173] Meanwhile, when the RF output device (190a1) is turned off, cold air (FAr) from the cooling chamber (FRM) is supplied into the cavity (CAV), and when the RF output device (190a1) is operated, cold air (FAr) from the cooling chamber (FRM) can be supplied into the cavity (CAV). Accordingly, the article (MAT) can be frozen without supplying an RF signal.

[0174] Meanwhile, when the RF output device (190a1) is operated, the power consumed by the compressor (112) may increase compared to before the operation of the RF output device (190a1). Accordingly, it is possible to maintain the freshness of the item (MAT) inside the refrigerator (100) and maintain the supercooled state of the item (MAT) by using an RF signal.

[0175] Meanwhile, when the RF output device (190a1) is operated, the temperature of the cooling chamber (FRM) may rise compared to before the operation of the RF output device (190a1). Accordingly, by using an RF signal, the freshness of the item (MAT) inside the refrigerator (100) can be maintained, and the item (MAT) can be kept in a supercooled state.

[0176] Meanwhile, an insulating material (CHa,CHb) may be attached to at least a portion of the inner or outer surface of the cavity (CAV). Accordingly, the interior of the cavity (CAV) is insulated from the cooling chamber (FRM), and the freshness of the items (MAT) inside the refrigerator (100) can be maintained using the RF signal output inside the cavity (CAV).

[0177] Meanwhile, when an operation signal for the operation of the RF output device (190a1) is input while the item (MAT) is located within the cavity (CAV), the RF output device (190a1) can output an RF signal toward the item (MAT). Accordingly, the freshness of the item (MAT) inside the refrigerator (100) can be maintained using the RF signal.

[0178] Meanwhile, the control unit (310) can control at least one of the output period of the RF signal and the output power to be variable depending on the type of product (MAT) or the input signal. Accordingly, the freshness of the product (MAT) can be properly maintained depending on the type of product (MAT).

[0179] Meanwhile, when an item (MAT) is located in a cavity (CAV), the temperature of the item (MAT) decreases based on the cold air (FAr) supplied into the cooling chamber (FRM), and can be maintained within a predetermined temperature range based on the RF signal from the RF output device (190a1). Accordingly, the freshness of the item (MAT) inside the refrigerator (100) can be maintained using the RF signal, and the supercooled state of the item (MAT) can be maintained.

[0180] Meanwhile, it is preferable that the temperature in the second section (P2aa) be higher than the lowest temperature of the item (MAT) when it descends in the first section (P1aa). Accordingly, it is possible to maintain the freshness of the item (MAT) in the refrigerator (100) using an RF signal while maintaining the supercooled state of the item (MAT).

[0181] Meanwhile, the control unit (310) can control the RF signal from the RF output device (190a1) to be output before the lowest temperature point in the first section (P1aa). Accordingly, the freshness of the item (MAT) inside the refrigerator (100) can be maintained using the RF signal, and the supercooled state of the item (MAT) can be maintained.

[0182] Meanwhile, after the refrigerator (100) is turned on, the temperature of the cavity (CAV) can continue to decrease until the temperature of the item (MAT) is maintained within a predetermined temperature range. Accordingly, by using an RF signal, the freshness of the item (MAT) inside the refrigerator (100) can be maintained while maintaining the supercooled state of the item (MAT).

[0183] Meanwhile, the downward slope or minimum temperature when the temperature of the item (MAT) in the first section (P1aa) is lowered can be varied according to the power of the RF signal from the RF output device (190a1). Accordingly, by using the RF signal, it is possible to maintain the freshness of the item (MAT) in the refrigerator (100) while maintaining the supercooled state of the item (MAT).

[0184] Meanwhile, the greater the power of the RF signal, the smaller the slope of the temperature drop of the item (MAT) becomes, and the lower the minimum temperature can be increased. Accordingly, by using the RF signal, it is possible to maintain the freshness of the item (MAT) inside the refrigerator (100) and maintain the supercooled state of the item (MAT).

[0185] Meanwhile, the control unit (310) can control the output of an RF signal from the RF output device (190a1) when the temperature of the item (MAT) decreases. Accordingly, the freshness of the item (MAT) inside the refrigerator (100) can be maintained using the RF signal, and the supercooled state of the item (MAT) can be maintained.

[0186] Meanwhile, the control unit (310) can turn off the RF output device (190a1) when the maintenance period within the predetermined temperature range of the item (MAT) is longer than the allowed period, and control the supply of cold air (FAr) supplied to the cooling chamber (FRM) within the cavity (CAV). Accordingly, it is possible to maintain the freshness of the item (MAT) inside the refrigerator (100) using an RF signal and maintain the supercooled state of the item (MAT).

[0187] Meanwhile, the control unit (310) controls the RF signal to be output into the cavity (CAV) when there is an operation input signal for the RF output device (190a1) while the item (MAT) is frozen, and it is preferable that the power of the RF signal output when the item (MAT) is frozen is greater than the power of the RF signal output before the item (MAT) is frozen. Accordingly, it is possible to maintain the freshness of the item (MAT) inside the refrigerator (100) and maintain the supercooled state of the item (MAT) using the RF signal.

[0188] Meanwhile, the frequency of the RF signal is preferably between 13.56 MHz and 433 MHz. Accordingly, the movement of water molecules within the article (MAT) by the RF signal is activated, making it possible to freeze the article (MAT) while maintaining the freshness of the article (MAT).

[0189] Meanwhile, the control unit (310) controls the output of a first power RF signal during the scan period, determines the type of item (MAT) based on the RF signal reflected during the scan period, and after the scan period ends, controls the output of a second power RF signal set according to the determined type of item (MAT). Accordingly, by using the RF signal, the freshness of the item (MAT) inside the refrigerator (100) can be efficiently maintained, and the supercooled state of the item (MAT) can be maintained.

[0190] Meanwhile, the control unit (310) can control the output of the RF signal in the cooling section, the cooling section before defrosting, the cooling section after defrosting, or the cooling section after defrosting to be greater than the output in the cooling section, the cooling section before defrosting, or the cooling section after defrosting. Accordingly, the freshness of the item (MAT) inside the refrigerator (100) can be maintained using the RF signal, and the item (MAT) can be maintained in a supercooled state.

[0191] Meanwhile, the control unit (310) can control the output of the RF signal to decrease or stop during the defrosting section or door (DOR) load-response operation, and to increase the output of the RF signal after the end of the load-response operation when the defrosting section or door (DOR) is opened. Accordingly, the freshness of the item (MAT) inside the refrigerator (100) can be maintained using the RF signal, and the supercooled state of the item (MAT) can be maintained.

[0192] Meanwhile, the control unit (310) can control the RF signal output so that the power of the RF signal decreases when the defrosting phase is performed, and the power of the RF signal increases when the defrosting phase ends. Accordingly, the freshness of the item (MAT) inside the refrigerator (100) can be maintained using the RF signal, and the supercooled state of the item (MAT) can be maintained.

[0193] Meanwhile, the control unit (310) can control the output of the operating RF signal to stop when the door (DOR) of the cooling chamber (FRM) or cavity (CAV) is opened. Accordingly, power consumption can be reduced.

[0194] Meanwhile, the control unit (310) can control the output of an RF signal when the door (DOR) of the cooling chamber (FRM) or cavity (CAV) is closed, the temperature of the cooling chamber (FRM) is below a first temperature, and the temperature inside the cavity (CAV) is below a second temperature which is higher than the first temperature. Accordingly, the freshness of the item (MAT) inside the refrigerator (100) can be maintained using the RF signal, and the item (MAT) can be kept in a supercooled state.

[0195] Meanwhile, the control unit (310) determines the state of the item (MAT) inside the cavity (CAV) while the RF signal is being output, and depending on the state of the item (MAT), it can vary the power of the RF signal, continue outputting the RF signal, or stop it. Accordingly, it is possible to maintain the freshness of the item (MAT) inside the refrigerator (100) using the RF signal and maintain the supercooled state of the item (MAT).

[0196] Meanwhile, the control unit (310) can control the output of the RF signal to stop when the temperature of the cooling chamber (FRM) exceeds the first temperature or the temperature inside the cavity (CAV) exceeds the second temperature. Accordingly, the freshness of the item (MAT) inside the refrigerator (100) can be maintained using the RF signal, and the item (MAT) can be kept in a supercooled state.

[0197] Meanwhile, the RF output device (190a1) includes a first plate (AND) and a second plate (CAT) disposed within the cavity (CAV), and the RF output device (190a1) may further include at least one of a signal detection unit (ED) for detecting an RF signal reflected from an item (MAT) within the cavity (CAV), a temperature detection unit (TD) for detecting the temperature within the cavity (CAV), and a camera (CAM) for photographing the item (MAT) within the cavity (CAV). Accordingly, through feedback on the RF signal output, it is possible to efficiently maintain the freshness of the item (MAT) within the refrigerator (100) and maintain the supercooled state of the item (MAT).

[0198] Meanwhile, the RF output device (190a1) of FIG. 5a is placed inside the cooling chamber (FRM), and can be placed inside or outside the cavity (CAV), and only needs to output an RF signal into the cavity (CAV).

[0199] FIG. 5b is a drawing illustrating another example of an RF output device, which is an example of a heat supply device of FIG. 4a.

[0200] Referring to the drawings, an RF output device (190a2) according to another embodiment of the present invention may have a cavity (CAV) disposed within a cooling chamber (FRM).

[0201] An RF output device (190a2) according to another embodiment of the present invention is similar to the RF output device (190a) of FIG. 5a, but differs in that the cavity (CAV) is composed of a drawer (DRA) and a basket (BSK).

[0202] Inside the basket (BSK), a rail member (RALa, RAlb) is arranged for connection with the drawer (DRA), and the drawer (DRA) can move back and forth by connecting with the rail member (RALa, RAlb). Accordingly, a door (DOR) as shown in FIG. 5a is omitted.

[0203] Meanwhile, the RF output device (190a2) may include a first plate (AND) and a second plate (CAT) disposed within a cavity (CAV) that is disposed inside or outside the cavity (CAV).

[0204] In particular, the drawing illustrates that the first plate (AND) is placed in the basket (BSK) and the second plate (CAT) is placed at the bottom of the drawer (DRA).

[0205] Meanwhile, the item (MAT) is placed on the lower part of the drawer (DRA) or on the second plate (CAT).

[0206] Meanwhile, the first plate (AND) can be electrically connected to the RF signal transmission unit ((312).

[0207] Meanwhile, when an article (MAT) is positioned on the second plate (CAT) or within the cavity (CAV), if an electrical signal is applied to at least one of the first plate (AND) and the second plate (CAT), an RF signal (RFa) can be output to the article (MAT) inside the cavity (CAV).

[0208] Meanwhile, it is preferable that the RF signal output from the RF output device (190a2) be output when the drawer (DRA) is coupled to the basket (BSK) and closed. To this end, the RF output device (190a2) may further be equipped with a drawer (DRA) coupling detection sensor that detects whether the drawer (DRA) is coupled.

[0209] Meanwhile, the RF signal transmission unit (312) can be connected to the RF driving unit (195a), and the RF driving unit (195a) can be controlled by the control unit (310).

[0210] Meanwhile, the RF output device (190a2) of FIG. 5b is placed inside the cooling chamber (FRM), and can be placed inside or outside the cavity (CAV), and only needs to output an RF signal into the cavity (CAV).

[0211] Figure 6 is a block diagram showing the interior of an RF drive unit, which is an example of a heat supply drive unit of Figure 4a.

[0212] Referring to the drawing, the RF output device (190a) is connected to the RF signal transmission unit ((312), and the RF signal transmission unit ((312)) can be connected to the RF driving unit (195a).

[0213] The input section (220) may be equipped with a separate button, etc., for turning on or off the operation of the RF output device (190a).

[0214] The display unit (230) can display information regarding the operation on or off of the RF output device (190a).

[0215] The control unit (310) can control the RF output device (190a) using the RF driving unit (195a).

[0216] The RF driving unit (195a) may include a frequency oscillation unit (332), a level adjustment unit (334), an amplification unit (336), a directional coupling unit (338), and a power detection unit (342).

[0217] The frequency oscillator (332) oscillates to output an RF signal of a corresponding frequency by means of a frequency control signal from the control unit (310).

[0218] The frequency oscillator (322) may be equipped with a voltage controlled oscillator (VCO). Depending on the voltage level of the frequency control signal, the voltage controlled oscillator (VCO) oscillates at a corresponding frequency. For example, the higher the voltage level of the frequency control signal, the higher the frequency generated by the voltage controlled oscillator (VCO).

[0219] The level control unit (334) can oscillate the frequency signal oscillated by the frequency oscillation unit (332) to output an RF signal at a corresponding power according to the power control signal. This level control unit (334) may be equipped with a voltage controlled attenuator (VCA).

[0220] Depending on the voltage level of the power control signal, the voltage control attenuation unit (VCA) performs a correction operation so that the RF signal is output at the corresponding power. For example, the higher the voltage level of the power control signal, the higher the power level of the signal output from the voltage control attenuation unit (VCA).

[0221] The amplifier (336) can amplify the oscillating frequency signal based on the frequency signal oscillating from the frequency oscillating unit (332) and the power control signal from the level control unit (334) to output an RF signal.

[0222] As described above, the amplifier (336) may be equipped with a solid-state power amplifier (SSPA) using a semiconductor device, and in particular, may be equipped with a monolithic microwave integrated circuit (MMIC) using a single substrate. By doing so, the size is reduced, and the integration of the device can be achieved.

[0223] Meanwhile, the frequency oscillator (332), level control unit (334), and amplifier (336) described above may be implemented as a single unit, and this may be referred to as a Solid State Power Oscillator (SSPO).

[0224] The directional coupler (DC) (338) transmits the RF signal amplified and output by the amplifier (336) to the RF signal transmission unit (312). The RF signal output from the RF signal transmission unit (312) is output to an item within the RF output device (190a).

[0225] Meanwhile, the RF signal that is not absorbed by the item within the RF output device (190a) and is reflected can be input again to the directional coupling unit (338) through the RF signal transmission unit (312). The directional coupling unit (338) transmits the reflected RF signal to the control unit (310).

[0226] Meanwhile, the power detection unit (342) is positioned between the directional coupling unit (338) and the control unit (310) and detects the output power of an RF signal that is amplified and output by the amplification unit (336), passes through the directional coupling unit (338), and is transmitted to the RF signal transmission unit (312). The detected power signal is input to the control unit (310) and used to calculate the signal output efficiency. Meanwhile, the power detection unit (342) may be implemented using diode elements or the like for power detection.

[0227] Meanwhile, the power detection unit (342) is positioned between the directional coupling unit (338) and the control unit (310) and detects the power of the reflected RF signal that is reflected from the RF output device (190a) and received by the directional coupling unit (338). The detected power signal is input to the control unit (310) and used to calculate the signal output efficiency. Meanwhile, the power detection unit (342) may be implemented using diode elements or the like for power detection.

[0228] Meanwhile, the RF driving unit (195a) is positioned between the amplification unit (336) and the directional coupling unit (338), and may further be provided with an isolation unit (not shown) that passes the RF signal when transmitting the RF signal amplified by the amplification unit (336) to the RF output device (190a) and blocks the RF signal reflected from the RF output device (190a). Here, the isolation unit (not shown) may be implemented as an isolator.

[0229] The signal output efficiency can be calculated based on the RF signal that is reflected without being absorbed by the item among the RF signals emitted into the control unit (310) and the RF output device (190a).

[0230] Meanwhile, the control unit (310) calculates the signal output efficiency for each frequency of the multiple RF signals when multiple RF signals are sequentially emitted into the RF output device (190a).

[0231] Meanwhile, the control unit (310) can control the RF signal output section to be divided into a scan section and a main operation section for efficient signal output.

[0232] The control unit (310) can sequentially output a plurality of RF signals into the RF output device (190a) during the scan period and calculate the signal output efficiency based on the reflected RF signals.

[0233] In addition, the control unit (310) may output each RF signal with a different output period or output only an RF signal of a predetermined frequency in the main operation section based on the signal output efficiency calculated in the scan section. Meanwhile, it is preferable that the power of the RF signal in the main operation section be significantly higher than the power of the RF signal in the scan section. Accordingly, power consumption can be reduced.

[0234] The control unit (310) can generate and output a frequency control signal to vary the output period of the RF signal according to the calculated signal output efficiency.

[0235] Meanwhile, the control unit (310) can also control the output of an RF signal of a corresponding frequency only when the signal output efficiency calculated for each frequency is greater than or equal to a set value.

[0236] The power supply unit (114) can boost the power input to the refrigerator (100) to a high voltage and output it to the RF drive unit (195a). The power supply unit (114) can be implemented as a high-voltage transformer or an inverter.

[0237] FIGS. 7a to 7d are drawings illustrating a cavity in a supercooling chamber according to an embodiment of the present invention.

[0238] Referring to the drawings, the cavity (CAV) in the supercooling chamber according to an embodiment of the present invention may include an outermost insulating case (ICA), a damper (DMP) formed on one side of the insulating case (ICA) and positioned near an inlet (ILT), a shield case (SCA) housed inside the insulating case (ICA), a first mesh grid (MGI) positioned on one side of the shield case (SCA), a fan (FAa) positioned on the mesh grid (MGI), an inlet temperature sensor (Tsi) positioned near the fan (FAa), a second mesh grid (MGI) positioned on the other side of the shield case (SCA), an outlet temperature sensor (Tso) positioned near the second mesh grid (MGI), a drawer (FDW) that can be pulled forward and is raised, and a door (DOR) attached to the front of the drawer (FDW) and rotatable.

[0239] An inlet is formed on one side of the insulating case (ICA) and an outlet is formed on the other side, and an inlet temperature sensor (Tsi) is disposed in an area corresponding to the vicinity of the inlet (ILT) of the insulating case (ICA), and an outlet temperature sensor (Tso) can be disposed in an area corresponding to the vicinity of the outlet (OLT) of the insulating case (ICA).

[0240] Meanwhile, the door (DOR) may include an inner shield cover (SCV) and an outer insulation cover (SCV) for heat blocking, etc.

[0241] Meanwhile, an antenna (ABT) may be placed on the upper inner surface of the shield case (SCA) for RF signal output into the drawer (FDW).

[0242] Due to the operation of the fan (FAa), cold air is introduced through the inlet (ILT) formed on one side of the insulating case (ICA), passes through the items inside the drawer (FDW), and the cold air, having undergone some heat exchange, is discharged through the outlet (OLT) formed on the other side of the insulating case (ICA).

[0243] Figure 8a is a graph showing the change in water temperature when no RF signal is output.

[0244] Referring to the drawing, GRw represents the graph of water temperature change due to cold air supply, and GRr represents the graph of ambient temperature change.

[0245] During the Pax period, the water temperature gradually decreases and can maintain an Lvtx temperature below the freezing point.

[0246] The Pax region can correspond to a liquid region where the temperature of water is below the freezing point but no phase change from liquid to solid occurs.

[0247] In particular, the section below 0°C (Povx) within the Pax section can be named the supercooling section.

[0248] In the Pax range, the temperature around the water remains lower than the water temperature.

[0249] Next, the Pbx section after the Pax section is a section in which the phase changes from liquid to solid due to the release of supercooling, and it may be a mixed section of liquid and solid.

[0250] During the Pbx interval, the water temperature rises sequentially, and due to the phase change from liquid to solid, a period occurs where the ambient temperature rises higher than the water temperature.

[0251] During the Pcx period following the Pbx period, water changes into a solid, so it can correspond to the solid period.

[0252] Accordingly, during the Pbx interval, the water temperature gradually decreases, and the ambient temperature remains lower than the water temperature.

[0253] In order to maintain the freshness of items inside the refrigerator (100), it is preferable not to cause supercooling. Therefore, it is important to ensure that condensation does not occur during the supercooling period through the internal movement of water molecules during the Pax period.

[0254] To this end, the present invention can output an RF signal into a cavity (CAV) inside a supercooling chamber using an RF output device (190a).

[0255] Figure 8b is a graph showing the change in water temperature depending on the presence or absence of an RF signal.

[0256] Referring to the drawing, Figure 8b (a) illustrates a graph of water temperature change (GRWa) when no RF signal is output.

[0257] In the graph of water temperature change (GRWa), the Pax1 section is a supercooling section where water is in a liquid state, the Pbx1 section is a section where the phase changes from liquid to solid due to the release of supercooling, which is a mixed section of liquid and solid, and the Pcx1 section can correspond to a solid section where water changes into a solid.

[0258] Figure 8b (b) illustrates a graph of water temperature change (GRWb) when no RF signal is output.

[0259] In the graph of water temperature change (GRWb), the Pay1 section is a supercooling section where water is in a liquid state, the Pby1 section is a section where the phase changes from liquid to solid due to the release of supercooling, and is a mixed section of liquid and solid, and the Pcy1 section can correspond to a solid section where water changes into a solid.

[0260] According to Fig. 8b (b), since an RF signal is output, the supercooled state is maintained for a considerably longer period compared to Fig. 8a (a) due to the movement of water molecules.

[0261] In particular, the release of supercooling occurs easily due to external impacts such as the opening and closing of the door, but according to Fig. 8b (b), the release of supercooling does not occur due to the output of the RF signal, and the supercooled state can be maintained for a considerably long period of time.

[0262] Ultimately, when an RF signal is output to an item in a liquid state, the freshness of the cold can be maintained for a considerably long period of time depending on the movement of water molecules.

[0263] Meanwhile, the present invention proposes a method for entering a re-supercooling state to maintain the freshness of an article in a situation where the supercooling is released regardless of whether an RF signal is output and the freezing of the article begins in a mixed liquid and solid section. In particular, a method is proposed to efficiently supply cold air and heat during re-supercooling so that the power consumption of the refrigerator (100) can be used efficiently. In particular, a method is proposed to efficiently supply cold air or heat until the supercooling maintenance section is reached. This is described with reference to FIG. 9 and below.

[0264] FIG. 9 is a flowchart illustrating the operation method of a refrigerator according to an embodiment of the present invention.

[0265] Referring to the drawing, the control unit (310) determines whether the supercooling chamber (OCR) is in an operable mode (S810).

[0266] For example, when the operation button outside the supercooling chamber (OCR) is turned on, the control unit (310) can control the supercooling chamber (OCR) to operate.

[0267] As another example, when the operation button outside the supercooling chamber (OCR) is turned off, the control unit (310) can control the supercooling chamber (OCR) so that it does not operate.

[0268] Meanwhile, prior to step 810 (S810), the operating mode of the first storage room (OCR) may be variable. The operating mode may include at least one of a refrigeration operating mode, a supercooling operating mode, and a defrosting mode.

[0269] For example, prior to step 810 (S810), the first storage room (OCR) may operate in a refrigerated operation mode, and after step 810 (S810), the first storage room (OCR) may operate in a supercooled operation mode.

[0270] Meanwhile, the notch temperature of the first storage room (OCR) in the refrigeration operation mode may be higher than the notch temperature of the first storage room (OCR) in the supercooling operation mode. Accordingly, the temperature of the first storage room (OCR) can be lowered further in the supercooling operation mode than in the refrigeration operation mode.

[0271] Meanwhile, the notch temperature can refer to the set temperature.

[0272] For example, the notch temperature of the refrigerator compartment may be 3°C, and the notch temperature of the freezer compartment may be -18°C. Meanwhile, the notch temperature of the first storage compartment (OCR) or the supercooling compartment may be between 0°C and -10°C.

[0273] Meanwhile, the notch temperature of the first storage chamber (OCR) in the refrigeration operation mode may be lower than the notch temperature of the first storage chamber (OCR) in the heating operation mode. Accordingly, the temperature of the first storage chamber (OCR) may rise more in the heating operation mode than in the refrigeration operation mode.

[0274] Meanwhile, the refrigerator (100) may further include a second storage room (RMR) positioned outside the first storage room (OCR). The second storage room (RMR) may correspond to the refrigerator room (RMR) of FIG. 1.

[0275] Accordingly, the control unit (310) can control the notch temperature of the second storage room (RMR) to be higher than the notch temperature for cooling operation of the first storage room (OCR). Therefore, the temperature of the second storage room (RMR) rises above the temperature of the first storage room (OCR).

[0276] Meanwhile, the refrigerator (100) may further include a third storage room (RMF). The third storage room (RMF) may correspond to the freezer room (RMF) of FIG. 1.

[0277] Accordingly, the control unit (310) can control the notch temperature for the third storage room (RMF) to be lower than the notch temperature for the cooling operation of the first storage room (OCR). Thus, the temperature of the third storage room (RMF) is lowered compared to the temperature of the first storage room (OCR).

[0278] Next, the control unit (310) can control the operation of a first operation step based on a first notch temperature for cooling operation of the first storage room (OCR) when the supercooling room (OCR) is in an operable mode (S815).

[0279] The first operating step may correspond to the first supercooling mode or the first supercooling section (P1aa in FIG. 12).

[0280] For example, the control unit (310) can control the fan to operate to supply cold air from the evaporator (122), which performs heat exchange using the refrigerant compressed in the compressor (112), to the first storage room (OCR) during the first operation stage.

[0281] For example, the control unit (310) can control the heat absorption surface of the thermoelectric element to operate during the first operation phase, thereby supplying the cold air generated from the heat absorption surface to the first storage room (OCR).

[0282] Specifically, the control unit (310) can control the fan (FAa in FIG. 15) to operate to supply cold air generated by heat exchange at the heat-absorbing surface of the thermoelectric element to the cavity (CAV) during the first operation stage.

[0283] Meanwhile, the control unit (310) can control the supply of cold air into the cavity (CAV) inside the supercooling chamber (OCR) during the first operation stage so that the temperature of the article (MAT) decreases sequentially.

[0284] At this time, the control unit (310) can control the output of the water molecule freezing inhibition means (WPF) to be zero when the first operation step (P1aa of FIG. 12) is being performed during the first operation step. Accordingly, the power consumption by the water molecule freezing inhibition means (WPF) can be reduced.

[0285] As another example, the control unit (310) can control the temperature of the article (MAT) to decrease sequentially by operating the water molecule freezing prevention means (WPF) while supplying cold air into the cavity (CAV) inside the supercooling chamber (OCR) during the first operation stage.

[0286] Next, the control unit (310) determines whether the supercooling is released (S820), and if applicable, can control the second operation step to be performed based on the second notch temperature for the heating operation of the first storage room (OCR) (S825).

[0287] The second operation step may correspond to a thawing mode or a thawing section (P2aa in FIG. 12). Accordingly, after step 825 (S825), the first storage room (OCR) may operate in a thawing mode.

[0288] For example, the control unit (310) can determine that supercooling is lifted when the temperature of the item (MAT) drops to a first target temperature.

[0289] As another example, the control unit (310) can determine that supercooling has been released when the temperature of the item (MAT) decreases and then increases.

[0290] As another example, the control unit (310) can determine that supercooling has been released when the temperature difference between the cavity (CAV) outlet and the inlet increases and then decreases.

[0291] As another example, the control unit (310) can determine that supercooling has been released when the temperature of the cavity (CAV) outlet decreases and then increases.

[0292] As another example, the control unit (310) can determine that supercooling has been released when the rate of change of the difference between the temperature of the cavity (CAV) outlet and the temperature of the inlet is greater than a predetermined value.

[0293] As another example, the control unit (310) can determine that the supercooling state of the article (MAT) is released when the first rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) for supplying cold air is operating, is greater than or equal to the first reference value, and the second rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) is off, is greater than or equal to the second reference value.

[0294] Meanwhile, when supercooling is released, the article (MAT) is in a liquid state according to the supercooling mode, but undergoes a rapid phase change and changes into a solid state.

[0295] The control unit (310) preferably performs a release mode to prevent freezing in order to maintain the freshness of the item (MAT).

[0296] Meanwhile, the control unit (310) can control the heat source (HS) to operate during the second operation phase.

[0297] For example, the control unit (310) can control at least one of the heater and the RF output device (180) to operate during the second operation phase. Accordingly, the temperature rises during the second operation phase.

[0298] Meanwhile, the control unit (310) can control the water molecule freezing inhibition means (WPF) to operate during the second operation stage.

[0299] For example, the control unit (310) can control at least one of an RF output device, an electric field output device, a magnetic field output device, and an ultrasonic output device to operate.

[0300] The control unit (310) can control the output of the water molecule freezing inhibition means (WPF) to be greater during the second operation step (P2aa in FIG. 12) than during the first operation step (P1aa in FIG. 12).

[0301] Meanwhile, the control unit (310) can control the supply of cold air to be stopped and the supply of heating air to be supplied to the cavity (CAV) inside the subcooling chamber (OCR) during the second operation stage so that the temperature of the article (MAT) rises sequentially.

[0302] Alternatively, the control unit (310) can control the supply of cold air and supply heat to the cavity (CAV) inside the subcooling chamber (OCR) during the second operation stage so that the temperature of the article (MAT) rises sequentially.

[0303] Next, the control unit (310) determines whether the thawing is complete (S830), and if applicable, can control the operation to be performed in a third operation step based on the third notch temperature for the cooling operation of the first storage room (OCR) (S835).

[0304] The third operating stage may correspond to the second supercooling mode or the second supercooling section (P3aa in FIG. 12).

[0305] For example, the control unit (310) may determine that thawing is complete when the temperature of the item (MAT) rises to a set thawing completion temperature. At this time, the set thawing completion temperature is preferably greater than 0℃.

[0306] As another example, the control unit (310) can determine that thawing is complete when the temperature of the item (MAT) rises and then falls.

[0307] As another example, the control unit (310) can determine that thawing is complete when the temperature difference between the exit and inlet of the cavity (CAV) is greater than zero.

[0308] As another example, the control unit (310) can determine that the thawing of the item (MAT) is completed when the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) is off is greater than zero, and the second rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) is off, is greater than or equal to the second reference value.

[0309] The control unit (310) can control the heat source (HS) to operate during the third operation phase.

[0310] At this time, it is preferable that the second notch temperature is a value higher than 0°C and the third notch temperature is a value lower than the first notch temperature. Accordingly, cold or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0311] Meanwhile, the control unit (310) can control the output of the water molecule freezing inhibition means (WPF) to become zero during the third operation stage.

[0312] Meanwhile, the control unit (310) can control the output of the water molecule freezing inhibition means (WPF) so that it becomes larger or equal during the third operation step (P3aa in FIG. 12) than during the first operation step (P1aa in FIG. 12).

[0313] For example, the control unit (310) can control the supply of cold air into the cavity (CAV) inside the subcooling chamber (OCR) during the third operation stage so that the temperature of the article (MAT) decreases sequentially.

[0314] As another example, the control unit (310) can control the temperature of the article (MAT) to decrease sequentially by supplying cold air into the cavity (CAV) inside the subcooling chamber (OCR) during the third operation stage and outputting an RF signal.

[0315] It is preferable that the magnitude or strength of the RF signal when performing the second supercooling mode be greater than the magnitude or strength of the RF signal when performing the first supercooling mode.

[0316] Meanwhile, it is preferable that the magnitude of the rate of change of temperature during the second supercooling mode is smaller than the magnitude of the rate of change of temperature during the first supercooling mode.

[0317] That is, it is desirable that the temperature drop during the second supercooling mode be performed more slowly than the temperature drop during the first supercooling mode.

[0318] Next, the control unit (310) determines whether the second target temperature is reached during the execution of the second supercooling mode (S840), and if applicable, can control the execution of the supercooling maintenance mode (S845).

[0319] The second target temperature at this time is a temperature higher than the supercooling release temperature, and it is preferable that it be higher than the first target temperature described above.

[0320] The control unit (310) can control the supply and off of heat repeatedly while supplying cold air into the cavity (CAV) inside the supercooling chamber (OCR) when the second target temperature is reached.

[0321] Meanwhile, the control unit (310) can control the heat supply period (Waa) during the supercooling maintenance mode to be longer than the remaining heat supply period (Wb). Accordingly, supercooling can be maintained efficiently.

[0322] Meanwhile, the control unit (310) can control the execution of step 860 if the second target temperature is not reached during the execution of the second supercooling mode.

[0323] The control unit (310) determines whether the second target temperature is not reached during the execution of the second supercooling mode (S860), and if applicable, controls the execution of a fourth operation step based on the fourth notch temperature for the heating operation of the first storage room (OCR) (S865).

[0324] At this time, the fourth notch temperature may be a value higher than 0℃.

[0325] The fourth operation step may correspond to a thawing mode or a thawing section. Accordingly, after step 865 (S865), the first storage room (OCR) may operate in a thawing mode.

[0326] Meanwhile, the control unit (310) can control the heat source (HS) to operate during the fourth operation stage.

[0327] For example, the control unit (310) can control at least one of the heater and the RF output device (180) to operate during the fourth operation phase. Accordingly, the temperature rises during the fourth operation phase.

[0328] Meanwhile, the control unit (310) can control the temperature of the fourth notch to be higher than the temperature of the second notch if the time elapsed from the point in time when the operating start condition of the second operating stage (P2aa in FIG. 12) is satisfied until the operating end condition of the second operating stage (P2aa in FIG. 12) is satisfied exceeds a predetermined range. Accordingly, cold air or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0329] Meanwhile, the control unit (310) can control the fourth notch temperature and the second notch temperature to be the same if the time elapsed from the point in time when the operation start condition of the second operation stage (P2aa in FIG. 12) is satisfied until the operation end condition of the second operation stage (P2aa in FIG. 12) is satisfied is within a predetermined range. Accordingly, cold air or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0330] Meanwhile, the control unit (310) can control the temperature of the fourth notch to be lower than the temperature of the second notch if the time elapsed from the point in time when the operating start condition of the second operating stage (P2aa in FIG. 12) is satisfied until the operating end condition of the second operating stage (P2aa in FIG. 12) is satisfied is less than a predetermined range. Accordingly, cold air or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0331] Meanwhile, the control unit (310) can control the temperature of the first storage room (OCR) to be higher than the second notch temperature when the temperature of the second notch (P2aa in FIG. 12) exceeds a predetermined range from the time when the operating start condition of the second operating stage (P2aa in FIG. 12) is satisfied to the time when the operating end condition of the second operating stage (P2aa in FIG. 12) is satisfied. Accordingly, cold air or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0332] Meanwhile, the control unit (310) can control the temperature of the first storage room (OCR) to be equal to the temperature of the fourth notch and the second notch if the temperature of the first storage room (OCR) is within a predetermined range from the time when the operating start condition of the second operating stage (P2aa in FIG. 12) is satisfied to the time when the operating end condition of the second operating stage (P2aa in FIG. 12) is satisfied. Accordingly, cold air or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0333] Meanwhile, the control unit (310) can control the temperature of the first storage room (OCR) to be lower than the second notch temperature if the temperature of the second notch is below a predetermined range from the time when the operating start condition of the second operating stage (P2aa in FIG. 12) is satisfied to the time when the operating end condition of the second operating stage (P2aa in FIG. 12) is satisfied. Accordingly, cold air or hot air can be efficiently supplied until the supercooling maintenance section is reached.

[0334] Meanwhile, a control unit (310) of a refrigerator (100) according to another embodiment of the present invention controls the operation of a first operation step (P1aa in FIG. 12) operated based on a first notch temperature for cooling operation of a first storage room (OCR), a second operation step (P2aa in FIG. 12) operated based on a second notch temperature for heating operation of a first storage room (OCR), and a third operation step (P3aa in FIG. 12) operated based on a third notch temperature for cooling operation of a first storage room (OCR), and controls the total amount of cold air supplied to the first storage room (OCR) in the third operation step (P3aa in FIG. 12) to be greater than the total amount of cold air supplied to the first storage room (OCR) in the first operation step (P1aa in FIG. 12). Accordingly, cold air or heat can be efficiently supplied until a supercooling maintenance section is reached.

[0335] Meanwhile, a control unit (310) of a refrigerator (100) according to another embodiment of the present invention controls the operation of a first operation step (P1aa in FIG. 12) operated based on a first notch temperature for cooling operation of a first storage room (OCR), a second operation step (P2aa in FIG. 12) operated based on a second notch temperature for heating operation of a first storage room (OCR), and a third operation step (P3aa in FIG. 12) operated based on a third notch temperature for cooling operation of a first storage room (OCR), and controls the output of a water molecule freezing inhibition means (WPF) in the third operation step (P3aa in FIG. 12) to be greater than or equal to the output of a water molecule freezing inhibition means (WPF) in the first operation step (P1aa in FIG. 12). Accordingly, cold air or hot air can be efficiently supplied until a supercooling maintenance section is reached.

[0336] FIG. 10a is a flowchart illustrating a method of operation of a refrigerator according to another embodiment of the present invention.

[0337] Referring to the drawing, the control unit (310) determines whether the supercooling chamber (OCR) is in an operable mode (S910).

[0338] For example, when the operation button outside the supercooling chamber (OCR) is turned on, the control unit (310) can control the supercooling chamber (OCR) to operate.

[0339] As another example, when the operation button outside the supercooling chamber (OCR) is turned off, the control unit (310) can control the supercooling chamber (OCR) so that it does not operate.

[0340] Next, the control unit (310) can control the first supercooling mode to be performed when the supercooling chamber (OCR) is in an operable mode (S915).

[0341] For example, the control unit (310) can control the supply of cold air into the cavity (CAV) inside the supercooling chamber (OCR) so that the temperature of the article (MAT) decreases sequentially.

[0342] As another example, the control unit (310) can control the temperature of the article (MAT) to decrease sequentially by supplying cold air into the cavity (CAV) inside the supercooling chamber (OCR) and outputting an RF signal.

[0343] Next, the control unit (310) determines whether the supercooling is terminated (S920), and if applicable, can control the first supercooling mode to terminate and the thawing mode to be performed (S925).

[0344] For example, the control unit (310) can determine that supercooling is lifted when the temperature of the item (MAT) drops to a first target temperature.

[0345] As another example, the control unit (310) can determine that supercooling has been released when the temperature of the item (MAT) decreases and then increases.

[0346] As another example, the control unit (310) can determine that supercooling has been released when the temperature difference between the cavity (CAV) outlet and the inlet increases and then decreases.

[0347] As another example, the control unit (310) can determine that supercooling has been released when the temperature of the cavity (CAV) outlet decreases and then increases.

[0348] As another example, the control unit (310) can determine that supercooling has been released when the rate of change of the difference between the temperature of the cavity (CAV) outlet and the temperature of the inlet is greater than a predetermined value.

[0349] As another example, the control unit (310) can determine that the supercooling state of the article (MAT) is released when the first rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) for supplying cold air is operating, is greater than or equal to the first reference value, and the second rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) is off, is greater than or equal to the second reference value.

[0350] Meanwhile, when supercooling is released, the article (MAT) is in a liquid state according to the supercooling mode, but undergoes a rapid phase change and changes into a solid state.

[0351] The control unit (310) preferably performs a release mode to prevent freezing in order to maintain the freshness of the item (MAT).

[0352] Meanwhile, the control unit (310) can control the supply of cold air to be stopped and the supply of heating air to be supplied to the cavity (CAV) inside the supercooling chamber (OCR) so that the temperature of the article (MAT) rises sequentially.

[0353] Alternatively, the control unit (310) can reduce the supply of cold air and supply heat within the cavity (CAV) inside the supercooling chamber (OCR) so that the temperature of the article (MAT) rises sequentially.

[0354] Next, the control unit (310) determines whether the thawing is complete (S930), and if applicable, can control the second supercooling mode to be performed (S935).

[0355] For example, the control unit (310) may determine that thawing is complete when the temperature of the item (MAT) rises to a set thawing completion temperature. At this time, the set thawing completion temperature is preferably greater than 0℃.

[0356] As another example, the control unit (310) can determine that thawing is complete when the temperature of the item (MAT) rises and then falls.

[0357] As another example, the control unit (310) can determine that thawing is complete when the temperature difference between the exit and inlet of the cavity (CAV) is greater than zero.

[0358] As another example, the control unit (310) can determine that the thawing of the item (MAT) is completed when the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) is off is greater than zero, and the second rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) is off, is greater than or equal to the second reference value.

[0359] For example, the control unit (310) can control the supply of cold air into the cavity (CAV) inside the supercooling chamber (OCR) so that the temperature of the article (MAT) decreases sequentially.

[0360] As another example, the control unit (310) can control the temperature of the article (MAT) to decrease sequentially by supplying cold air into the cavity (CAV) inside the supercooling chamber (OCR) and outputting an RF signal.

[0361] It is preferable that the magnitude or strength of the RF signal when performing the second supercooling mode be greater than the magnitude or strength of the RF signal when performing the first supercooling mode.

[0362] Meanwhile, it is preferable that the magnitude of the rate of change of temperature during the second supercooling mode is smaller than the magnitude of the rate of change of temperature during the first supercooling mode.

[0363] That is, it is desirable that the temperature drop during the second supercooling mode be performed more slowly than the temperature drop during the first supercooling mode.

[0364] Next, the control unit (310) determines whether the second target temperature is reached during the execution of the second supercooling mode (S940), and if applicable, can control the execution of the supercooling maintenance mode (S945).

[0365] The second target temperature at this time is a temperature higher than the supercooling release temperature, and it is preferable that it be higher than the first target temperature described above.

[0366] The control unit (310) can control the supply and off of heat repeatedly while supplying cold air into the cavity (CAV) inside the supercooling chamber (OCR) when the second target temperature is reached.

[0367] Meanwhile, the control unit (310) can control the heat supply period (Waa) during the supercooling maintenance mode to be longer than the remaining heat supply period (Wb). Accordingly, supercooling can be maintained efficiently.

[0368] FIG. 10b is a flowchart illustrating a method of operation of a refrigerator according to another embodiment of the present invention.

[0369] Referring to the drawing, the control unit (310) determines whether the supercooling chamber (OCR) is in an operable mode (S1010).

[0370] For example, when the operation button outside the supercooling chamber (OCR) is turned on, the control unit (310) can control the supercooling chamber (OCR) to operate.

[0371] Next, the control unit (310) can control the supply of cold air into the cavity (CAV) when the supercooling chamber (OCR) is in an operational mode so that the temperature of the article (MAT) decreases sequentially (S1015).

[0372] Meanwhile, the control unit (310) may also control the temperature of the article (MAT) to decrease sequentially by supplying cold air into the cavity (CAV) inside the supercooling chamber (OCR) and outputting an RF signal.

[0373] Next, the control unit (310) determines whether the supercooling is released (S1020), and if applicable, supplies heating into the cavity (CAV) to control the temperature of the article (MAT) to rise sequentially (S1025).

[0374] For example, the control unit (310) can determine that supercooling is lifted when the temperature of the item (MAT) drops to a first target temperature.

[0375] As another example, the control unit (310) can determine that supercooling has been released when the temperature of the item (MAT) decreases and then increases.

[0376] As another example, the control unit (310) can determine that supercooling has been released when the temperature difference between the cavity (CAV) outlet and the inlet increases and then decreases.

[0377] As another example, the control unit (310) can determine that the supercooling state of the article (MAT) is released when the first rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) for supplying cold air is operating, is greater than or equal to the first reference value, and the second rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) is off, is greater than or equal to the second reference value.

[0378] Meanwhile, when supercooling is released, the article (MAT) is in a liquid state according to the supercooling mode, but undergoes a rapid phase change and changes into a solid state.

[0379] The control unit (310) preferably performs a release mode to prevent freezing in order to maintain the freshness of the item (MAT).

[0380] Meanwhile, the control unit (310) can stop supplying cold air into the cavity (CAV) and supply heating air to control the temperature of the item (MAT) to rise sequentially when the supercooling is deactivated. By stopping the supply of cold air, the refrigerator's power consumption can be managed efficiently.

[0381] Meanwhile, the control unit (310) may reduce the supply of cold air and supply heat within the cavity (CAV) inside the supercooling chamber (OCR) so that the temperature of the article (MAT) rises sequentially.

[0382] Next, the control unit (310) determines whether the thawing is complete (S1030), and if applicable, supplies cold air into the cavity (CAV) inside the supercooling chamber (OCR) so that the temperature of the item (MAT) decreases sequentially (S1035).

[0383] For example, the control unit (310) may determine that thawing is complete when the temperature of the item (MAT) rises to a set thawing completion temperature. At this time, the set thawing completion temperature is preferably greater than 0℃.

[0384] As another example, the control unit (310) can determine that thawing is complete when the temperature of the item (MAT) rises and then falls.

[0385] As another example, the control unit (310) can determine that the thawing of the item (MAT) is completed when the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) is off is greater than zero, and the second rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) is off, is greater than or equal to the second reference value.

[0386] Meanwhile, the control unit (310) can control the temperature of the article (MAT) to decrease sequentially by supplying cold air into the cavity (CAV) inside the supercooling chamber (OCR) when the thawing is complete and outputting an RF signal.

[0387] Meanwhile, it is preferable that the magnitude of the rate of change of temperature during the second supercooling mode is smaller than the magnitude of the rate of change of temperature during the first supercooling mode.

[0388] That is, it is desirable that the temperature drop during the second supercooling mode be performed more slowly than the temperature drop during the first supercooling mode.

[0389] Next, the control unit (310) determines whether the second target temperature is reached during the execution of the second supercooling mode (S1040), and if applicable, can control the second target temperature to be maintained within a predetermined range (SCPaa) based on the second target temperature (S1045).

[0390] The second target temperature at this time is a temperature higher than the supercooling release temperature, and it is preferable that it be higher than the first target temperature described above.

[0391] The control unit (310) can control the supply and off of heat repeatedly while supplying cold air into the cavity (CAV) inside the supercooling chamber (OCR) when the second target temperature is reached.

[0392] Accordingly, the temperature of the item (MAT) can be maintained within a predetermined range (SCPaa) based on the second target temperature.

[0393] Meanwhile, the control unit (310) can control the heat supply period (Waa) during the supercooling maintenance mode to be longer than the remaining heat supply period (Wb). Accordingly, supercooling can be maintained efficiently.

[0394] FIG. 11 is a flowchart illustrating a method of operation of a refrigerator according to another embodiment of the present invention.

[0395] Referring to the drawing, the control unit (310) determines whether the supercooling chamber (OCR) is in an operable mode (S1110b).

[0396] For example, when the operation button outside the supercooling chamber (OCR) is turned on, the control unit (310) can control the supercooling chamber (OCR) to operate.

[0397] Next, the control unit (310) can control the supply of cold air into the cavity (CAV) during the first interval (P1aa) when the supercooling chamber (OCR) is in an operable mode so that the temperature of the article (MAT) decreases sequentially (S1115b).

[0398] Meanwhile, the control unit (310) may also control the temperature of the article (MAT) to decrease sequentially by supplying cold air into the cavity (CAV) inside the supercooling chamber (OCR) and outputting an RF signal.

[0399] Next, the control unit (310) determines whether the supercooling is released (S1120b), and if applicable, can control the temperature of the article (MAT) to rise sequentially by supplying heating into the cavity (CAV) during the second section (P2aa) after the first section (P1aa) (S1125b).

[0400] For example, the control unit (310) may determine that supercooling is lifted when the temperature of the item (MAT) drops to a first target temperature. At this time, the first target temperature may correspond to the supercooling lifted temperature.

[0401] As another example, the control unit (310) can determine that supercooling has been released when the temperature of the item (MAT) decreases and then increases.

[0402] As another example, the control unit (310) can determine that supercooling has been released when the temperature difference between the cavity (CAV) outlet and the inlet increases and then decreases.

[0403] As another example, the control unit (310) can determine that the supercooling state of the article (MAT) is released when the first rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) for supplying cold air is operating, is greater than or equal to the first reference value, and the second rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) is off, is greater than or equal to the second reference value.

[0404] Meanwhile, when supercooling is released, the article (MAT) is in a liquid state according to the supercooling mode, but undergoes a rapid phase change and changes into a solid state.

[0405] The control unit (310) preferably performs a release mode to prevent freezing in order to maintain the freshness of the item (MAT).

[0406] Meanwhile, the control unit (310) can stop supplying cold air and supply heating air into the cavity (CAV) during the second section (P2aa) after the first section (P1aa) when the supercooling is deactivated, thereby controlling the temperature of the item (MAT) to rise sequentially. By stopping the supply of cold air, the refrigerator's power consumption can be managed efficiently.

[0407] Meanwhile, as examples of heating, heat from a heater (not shown) and an RF signal from an RF output device (190a) may be exemplified, and the following description focuses on the output of the RF signal.

[0408] Meanwhile, the control unit (310) may reduce the supply of cold air and supply heat within the cavity (CAV) inside the supercooling chamber (OCR) so that the temperature of the article (MAT) rises sequentially.

[0409] Next, the control unit (310) determines whether the thawing is complete (S1130b), and if applicable, supplies cold air into the cavity (CAV) inside the supercooling chamber (OCR) during the third section (P3aa) after the second section (P2aa), and can control the cold air size and hot air size to increase compared to the first section (S1135b).

[0410] For example, the control unit (310) may determine that thawing is complete when the temperature of the item (MAT) rises to a set thawing completion temperature. At this time, the set thawing completion temperature is preferably greater than 0℃.

[0411] As another example, the control unit (310) can determine that thawing is complete when the temperature of the item (MAT) rises and then falls.

[0412] As another example, the control unit (310) can determine that the thawing of the item (MAT) is completed when the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) is off is greater than zero, and the second rate of change, which is the difference between the outlet temperature and the inlet temperature of the cavity (CAV) when the fan (FAa) is off, is greater than or equal to the second reference value.

[0413] Meanwhile, the control unit (310) can control the temperature of the article (MAT) to decrease sequentially by supplying cold air into the cavity (CAV) inside the supercooling chamber (OCR) and outputting heat when the thawing is complete.

[0414] At this time, the size of the cold air (PVa3) during the third section (P3aa) is controlled to be greater than the size of the cold air (PVa) during the first section (P1aa). Accordingly, it is possible to maintain supercooling efficiently without placing a temperature sensor inside the cavity (CAV). In particular, it is possible to efficiently supply cold air during the third section (P3aa), which is the supercooling section.

[0415] Meanwhile, it is preferable that the magnitude of the rate of change of temperature during the second supercooling mode is greater than the magnitude of the rate of change of temperature during the first supercooling mode.

[0416] That is, it is desirable that the temperature drop during the second supercooling mode be performed more rapidly than the temperature drop during the first supercooling mode.

[0417] Next, the control unit (310) determines whether the second target temperature is reached during the execution of the second supercooling mode (S1140b), and if applicable, can control the second target temperature to be maintained within a predetermined range (SCPaa) based on the second target temperature (S1145b).

[0418] The second target temperature at this time is a temperature higher than the supercooling release temperature, and it is preferable that it be higher than the first target temperature described above.

[0419] The control unit (310) can control the supply and off of heat repeatedly while supplying cold air into the cavity (CAV) inside the supercooling chamber (OCR) when the second target temperature is reached.

[0420] Accordingly, the temperature of the item (MAT) can be maintained within a predetermined range (SCPaa) based on the second target temperature.

[0421] Meanwhile, the control unit (310) can control the heat supply period (Waa) during the supercooling maintenance mode to be longer than the remaining heat supply period (Wb). Accordingly, supercooling can be maintained efficiently.

[0422] FIG. 12 illustrates an example of a temperature graph (GRgba) of an article, a cold graph (GRCba) and a hot graph (GRhba) corresponding to the temperature of the article.

[0423] Referring to the drawing, as shown in FIG. 12 (a), the temperature of the item (MAT) is sequentially lowered during the first section (P1aa), the temperature of the item (MAT) is sequentially raised during the second section (P2aa), the temperature of the item (MAT) is sequentially lowered during the third section (P3aa), and during the fourth section (P4aa), the temperature of the item (MAT) can be maintained within a predetermined range (SCPaa) based on the third temperature (T3aa).

[0424] The control unit (310) can control the temperature of the article (MAT) to sequentially decrease to a first temperature (T1aa), which is a first target temperature or a first supercooling setting temperature, during a first interval (P1aa) according to the first supercooling mode.

[0425] To this end, the control unit (310) can control the supply of cold air into the cavity (CAV) during the first section (P1aa), as shown in (b) of FIG. 12.

[0426] In particular, the control unit (310) can control the cold air supply device (180) to supply cold air having a magnitude of PVa during the first section (P1aa). Accordingly, the temperature of the item (MAT) is sequentially lowered to the first temperature (T1aa).

[0427] Meanwhile, the control unit (310) can control the heat not to be supplied into the cavity (CAV) during the first section (P1aa), which is the first supercooling mode, as shown in (c) of FIG. 12.

[0428] Meanwhile, the control unit (310) can determine that the supercooling is released when the temperature of the item (MAT) decreases and then increases, and control the thawing mode to be performed.

[0429] Accordingly, the control unit (310) can control so that cold air is not supplied into the cavity (CAV) during the second section (P2aa), as shown in (b) of FIG. 12.

[0430] And, the control unit (310) can control to supply heat having a size of PVb as shown in (c) of FIG. 12 during the second section (P2aa). Accordingly, the temperature of the article (MAT) rises sequentially to the second temperature (T2aa).

[0431] For example, the control unit (310) can control the supply of heat into the cavity (CAV) by using the RF signal output by operating the RF output device (190a).

[0432] In particular, during the Pfaa section of the second section (P2aa), thawing may be performed, and during the Psaa section, part of the product (MAT) may be in a slushy state.

[0433] Meanwhile, the control unit (310) can determine that the thawing is complete when the temperature of the item (MAT) rises and then falls, and control the second supercooling mode to be performed.

[0434] Next, the control unit (310) can control the temperature of the item (MAT) to sequentially decrease to a third temperature (T3aa), which is a second target temperature, during a third section (P3aa) according to the second supercooling mode.

[0435] The third temperature (T3aa) is a temperature higher than the first temperature (T1aa) and can correspond to a supercooling maintenance temperature rather than a supercooling release temperature.

[0436] To this end, the control unit (310) can control the supply of cold air having a size of PVa3, which is larger than PVa of the first section (P1aa), during the third section (P3aa), as shown in (b) of FIG. 12. Accordingly, the temperature of the item (MAT) is sequentially lowered to the first temperature (T1aa).

[0437] In particular, the control unit (310) controls the size of the cold air (PVa3) during the third section (P3aa) to be greater than the size of the cold air (PVa) during the first section (P1aa), and accordingly, the cold air can be efficiently supplied during the third section (P3aa), which is a supercooling section.

[0438] Meanwhile, the control unit (310) can control to supply heat having the size of PVc during the third section (P3aa), as shown in (c) of FIG. 12.

[0439] In particular, the control unit (310) can control the amount of heat supplied during the third section (P3aa) to be greater than the amount of heat supplied during the first section (P1aa).

[0440] Meanwhile, the control unit (310) can control the magnitude of the temperature change rate (Slb) of the item (MAT) during the third section (P3aa) to be greater than the magnitude of the temperature change rate (Sla) of the item (MAT) during the first section (P1aa).

[0441] Accordingly, the temperature of the product (MAT) drops rapidly in the third section (P3aa), which is the second supercooling mode, compared to the first section (P1aa), which is the first supercooling mode.

[0442] Meanwhile, the control unit (310) can control the heat size (PVc) during the third section (P3aa) to be smaller than the heat size (PVb) during the second section (P2aa).

[0443] Meanwhile, the control unit (310) can control the temperature of the item (MAT) to be maintained within a predetermined range (SCPaa) based on the third temperature (T3aa) during the fourth section (P4aa) after the third section (P3aa). Accordingly, supercooling can be maintained efficiently.

[0444] Meanwhile, the fourth section (P4aa) can be named the supercooling maintenance section.

[0445] To this end, the control unit (310) can control to supply cold air having a size of PVa3, which is larger than PVa of the first section (P1aa), during the fourth section (P4aa), as shown in (b) of FIG. 12.

[0446] Meanwhile, the control unit (310) controls the supply of heat into the cavity (CAV) as shown in (c) of FIG. 12 during the fourth section (P4aa), and controls the supply and off of heat to be repeated. Accordingly, supercooling can be maintained efficiently.

[0447] Meanwhile, the control unit (310) can control the first heat supply period (Waa) of the fourth section (P4aa) to be longer than the remaining heat supply period (Wb). Accordingly, supercooling can be maintained efficiently.

[0448] FIG. 13 illustrates other examples of a temperature graph (GRgbb) of an article, a cold graph (GRCbb) and a hot graph (GRhbb) corresponding to the temperature of the article.

[0449] Referring to the drawing, as shown in FIG. 13 (a), the temperature of the item (MAT) is sequentially lowered during the first section (P1aa), the temperature of the item (MAT) is sequentially raised during the second section (P2aa), the temperature of the item (MAT) is sequentially lowered during the third section (P3aa), and during the fourth section (P4aa), the temperature of the item (MAT) can be maintained within a predetermined range (SCPaa) based on the third temperature (T3aa).

[0450] The control unit (310) can control the temperature of the article (MAT) to sequentially decrease to a first temperature (T1aa), which is a first target temperature or a first supercooling setting temperature, during a first interval (P1aa) according to the first supercooling mode.

[0451] To this end, the control unit (310) can control the cold air supply device (180) during the first section (P1aa) as shown in FIG. 13 (b) to supply cold air having a magnitude of PVa during the first section (P1aa). Accordingly, the temperature of the item (MAT) is sequentially lowered to the first temperature (T1aa).

[0452] Meanwhile, the control unit (310) can control the supply of heat having a size of PVo smaller than PVc and PVb into the cavity (CAV) during the first section (P1aa), which is the first supercooling mode, as shown in (c) of FIG. 13.

[0453] That is, the control unit (310) can control the supply of heat to the cavity (CAV) such that, during the first section (P1aa), heat smaller than the heat size (PVb) during the second section (P2aa) is supplied. Accordingly, the supercooling during the first section (P1aa) can be stably maintained.

[0454] Meanwhile, the control unit (310) can determine that the supercooling is released when the temperature of the item (MAT) decreases and then increases, and control the thawing mode to be performed.

[0455] Accordingly, the control unit (310) can control so that cold air is not supplied into the cavity (CAV) during the second section (P2aa), as shown in (b) of FIG. 13.

[0456] And, the control unit (310) can control to supply heat having a size of PVb as shown in (c) of FIG. 13 during the second section (P2aa). Accordingly, the temperature of the article (MAT) rises sequentially to the second temperature (T2aa).

[0457] For example, the control unit (310) can control the supply of heat into the cavity (CAV) by using the RF signal output by operating the RF output device (190a).

[0458] Meanwhile, the control unit (310) can determine that the thawing is complete when the temperature of the item (MAT) rises and then falls, and control the second supercooling mode to be performed.

[0459] Next, the control unit (310) can control the temperature of the item (MAT) to sequentially decrease to a third temperature (T3aa), which is a second target temperature, during a third section (P3aa) according to the second supercooling mode.

[0460] The third temperature (T3aa) is a temperature higher than the first temperature (T1aa) and can correspond to a supercooling maintenance temperature rather than a supercooling release temperature.

[0461] To this end, the control unit (310) can control the supply of cold air having a size of PVa3, which is larger than PVa of the first section (P1aa), during the third section (P3aa), as shown in (b) of FIG. 13. Accordingly, the temperature of the item (MAT) is sequentially lowered to the first temperature (T1aa).

[0462] In particular, the control unit (310) controls the size of the cold air (PVa3) during the third section (P3aa) to be greater than the size of the cold air (PVa) during the first section (P1aa), and accordingly, the cold air can be efficiently supplied during the third section (P3aa), which is a supercooling section.

[0463] Meanwhile, the control unit (310) can control to supply heat having the size of PVc during the third section (P3aa), as shown in (c) of FIG. 13.

[0464] Meanwhile, the control unit (310) can control the temperature of the item (MAT) to be maintained within a predetermined range (SCPaa) based on the third temperature (T3aa) during the fourth section (P4aa) after the third section (P3aa). Accordingly, supercooling can be maintained efficiently.

[0465] To this end, the control unit (310) can control to supply cold air having a size of PVa3, which is larger than PVa of the first section (P1aa), during the fourth section (P4aa), as shown in (b) of FIG. 13.

[0466] Meanwhile, the control unit (310) controls the supply of heat into the cavity (CAV) as shown in (c) of FIG. 13 during the fourth section (P4aa), and controls the supply and off of heat to be repeated. Accordingly, supercooling can be maintained efficiently.

[0467] Meanwhile, the control unit (310) can control the first heat supply period (Waa) of the fourth section (P4aa) to be longer than the remaining heat supply period (Wb). Accordingly, supercooling can be maintained efficiently.

[0468] FIG. 14 illustrates another example of a temperature graph (GRgbc) of an article, a cold graph (GRCbc) and a hot graph (GRhbc) corresponding to the temperature of the article.

[0469] Referring to the drawing, as shown in FIG. 14 (a), the temperature of the item (MAT) is sequentially lowered during the first section (P1aa), the temperature of the item (MAT) is sequentially raised during the second section (P2aa), the temperature of the item (MAT) is sequentially lowered during the third section (P3aa), and during the fourth section (P4aa), the temperature of the item (MAT) can be maintained within a predetermined range (SCPaa) based on the third temperature (T3aa).

[0470] The control unit (310) can control the temperature of the article (MAT) to sequentially decrease to a first temperature (T1aa), which is a first target temperature or a first supercooling setting temperature, during a first interval (P1aa) according to the first supercooling mode.

[0471] To this end, the control unit (310) can control the supply of cold air into the cavity (CAV) during the first section (P1aa), as shown in (b) of FIG. 14.

[0472] In particular, the control unit (310) can control the cold air supply device (180) to supply cold air having a magnitude of PVa during the first section (P1aa). Accordingly, the temperature of the item (MAT) is sequentially lowered to the first temperature (T1aa).

[0473] Meanwhile, the control unit (310) can control the supply of heat having a size of PVc smaller than PVb into the cavity (CAV) during the first section (P1aa), which is the first supercooling mode, as shown in (c) of FIG. 14.

[0474] That is, the control unit (310) can control the supply of heat to the cavity (CAV) such that, during the first section (P1aa), heat smaller than the heat size (PVb) during the second section (P2aa) is supplied. Accordingly, the supercooling during the first section (P1aa) can be stably maintained.

[0475] Meanwhile, the control unit (310) can determine that the supercooling is released when the temperature of the item (MAT) decreases and then increases, and control the thawing mode to be performed.

[0476] Accordingly, the control unit (310) can control so that cold air is not supplied into the cavity (CAV) during the second section (P2aa), as shown in (b) of FIG. 14.

[0477] And, the control unit (310) can control the supply of heat to sequentially rise from PVb to PVb and maintain the size of PVb during the second section (P2aa), as shown in (c) of FIG. 14. Accordingly, the temperature of the item (MAT) rises sequentially to the second temperature (T2aa).

[0478] For example, the control unit (310) can control the supply of heat into the cavity (CAV) by using the RF signal output by operating the RF output device (190a).

[0479] In particular, during the Pfaa section of the second section (P2aa), thawing may be performed, and during the Psaa section, part of the product (MAT) may be in a slushy state.

[0480] Meanwhile, the control unit (310) can determine that the thawing is complete when the temperature of the item (MAT) rises and then falls, and control the second supercooling mode to be performed.

[0481] Next, the control unit (310) can control the temperature of the item (MAT) to sequentially decrease to a third temperature (T3aa), which is a second target temperature, during a third section (P3aa) according to the second supercooling mode.

[0482] The third temperature (T3aa) is a temperature higher than the first temperature (T1aa) and can correspond to a supercooling maintenance temperature rather than a supercooling release temperature.

[0483] To this end, the control unit (310) can control the supply of cold air having a size of PVa3, which is larger than PVa of the first section (P1aa), during the third section (P3aa), as shown in (b) of FIG. 14. Accordingly, the temperature of the item (MAT) is sequentially lowered to the first temperature (T1aa).

[0484] In particular, the control unit (310) controls the size of the cold air (PVa3) during the third section (P3aa) to be greater than the size of the cold air (PVa) during the first section (P1aa), and accordingly, the cold air can be efficiently supplied during the third section (P3aa), which is a supercooling section.

[0485] Meanwhile, the control unit (310) can control the supply of heat to sequentially decrease from PVb to PVo and maintain the size of PVo during the third section (P3aa), as shown in (c) of FIG. 14.

[0486] At this time, the magnitude of PVo may be smaller than PVc during the first interval (P1aa).

[0487] That is, the control unit (310) can control the amount of heat supplied during the third section (P3aa) to be smaller than the amount of heat supplied during the first section (P1aa).

[0488] Meanwhile, the control unit (310) can control the magnitude of the temperature change rate (Slb) of the item (MAT) during the third section (P3aa) to be greater than the magnitude of the temperature change rate (Sla) of the item (MAT) during the first section (P1aa).

[0489] Accordingly, the temperature of the product (MAT) drops rapidly in the third section (P3aa), which is the second supercooling mode, compared to the first section (P1aa), which is the first supercooling mode.

[0490] Meanwhile, the control unit (310) can control the heat size (PVc) during the third section (P3aa) to be smaller than the heat size (PVb) during the second section (P2aa).

[0491] Meanwhile, the control unit (310) can control the temperature of the item (MAT) to be maintained within a predetermined range (SCPaa) based on the third temperature (T3aa) during the fourth section (P4aa) after the third section (P3aa). Accordingly, supercooling can be maintained efficiently.

[0492] To this end, the control unit (310) can control to supply cold air having a size of PVa3, which is larger than PVa of the first section (P1aa), during the fourth section (P4aa), as shown in (b) of FIG. 14.

[0493] Meanwhile, the control unit (310) controls the supply of heat into the cavity (CAV) as shown in (c) of FIG. 14 during the fourth section (P4aa), and in particular, can control the supply of heat having a size of PVo. Accordingly, supercooling can be maintained efficiently.

[0494] FIGS. 15 to 20 are drawings illustrating various examples of a supercooling chamber according to an embodiment of the present invention.

[0495] First, FIG. 15 is a drawing illustrating an example of a supercooling chamber (OCRa) placed within a refrigerator room (RMR).

[0496] Referring to the drawing, the supercooling chamber (OCRa) may be provided with a cavity (CAV) in which an article (MAT) is placed and disposed within the supercooling chamber (OCRa), an inlet temperature sensor (Tsi) for detecting the temperature of the inlet (ILT) of the cavity (CAV), an outlet temperature sensor (Tso) for detecting the temperature of the outlet (OLT) of the cavity (CAV), a cold air supply device (180) for supplying or blocking cold air to the cavity (CAV), and a hot air supply device (190) for supplying or blocking hot air into the cavity (CAV). Accordingly, supercooling can be maintained efficiently using RF signals without the need for a temperature sensor to be placed within the cavity.

[0497] The cold air supply device (180) may include a fan (FAa) placed at the inlet (ILT) of the cavity (CAV).

[0498] Meanwhile, the control unit (310) can control the supply of cold air supplied to the cavity (CAV) by controlling the on / off of the fan (FAa).

[0499] The heat supply device (190) may include an RF output device (190) that outputs an RF signal. In particular, an antenna (ANT) for outputting an RF signal may be disposed on the upper part of the cavity (CAV).

[0500] Meanwhile, the supercooling chamber (OCRa) may further include a partition (BAR) separating the inlet (IOC) of the supercooling chamber (OCRa) and the outlet (OOC) of the supercooling chamber (OCRa).

[0501] Accordingly, cold air from the freezer (RMF) does not flow from the inlet (IOC) of the supercooling chamber (OCRa) toward the outlet (OOC) of the supercooling chamber (OCRa).

[0502] The cold room (RMF) may include a cold air output device (CSO), a damper (DMP), a cold air supply duct (CSD), and a cold air return duct (CRD).

[0503] Here, the cold air output device (CSO) may include a heat exchanger that has been heat-exchanged by a compressor drive, a fan that supplies cold air that has been heat-exchanged in the heat exchanger, or a thermoelectric module.

[0504] Cold air from the freezer (RMF) is transferred to the inlet (IOC) in the supercooling chamber (OCRa) via the outlet (ORF) for cold air output of the freezer (RMF) and the cold air supply duct (CSD).

[0505] Meanwhile, cold air from the outlet (OOC) in the subcooling chamber (OCRa) is transferred to the cold air recovery duct (CRD) and the inlet (IRF) for cold air input to the refrigeration chamber (RMF).

[0506] Meanwhile, unlike the drawing, the damper (DMP) may be placed inside the supercooling chamber (OCRa).

[0507] It is desirable that the supercooling chamber (OCRa) be insulated from the outside and also insulated from the internal cavity (CAV). To this end, it is desirable that an insulating material be attached to the inner surface of the supercooling chamber (OCRa).

[0508] Meanwhile, it is desirable to attach insulation material to the inner surface of the cavity (CAV) as well.

[0509] Meanwhile, when the supercooling chamber (OCRa) is placed in the refrigeration chamber (RMR), the cold air supply device (180) according to an embodiment of the present invention may further include a cold air supply duct (CSD) that supplies cold air to the inlet (IOC) of the supercooling chamber (OCRa), and a cold air recovery duct (CRD) in the refrigeration chamber (RMF) that recovers cold air from the outlet (OOC) of the supercooling chamber (OCRa).

[0510] Meanwhile, the cold air supply device (180) according to an embodiment of the present invention may further include a damper (DMP) that operates to supply cold air to a cold air supply duct (CSD).

[0511] Meanwhile, the control unit (310) can control the supply of cold air supplied to the supercooling chamber (OCRa) by controlling the opening rate of the damper (DMP).

[0512] Next, FIG. 16 is a drawing illustrating another example of an OCRb placed within a refrigeration room (RMR).

[0513] Referring to the drawings, unlike the supercooling chamber (OCRb) of Fig. 15, the partition (BAR), etc., is not disclosed in the supercooling chamber (OCRa) of Fig. 16.

[0514] Referring to the drawing, the supercooling chamber (OCRb) is provided with a cavity (CAV) in which an article (MAT) is placed and which is disposed within the supercooling chamber (OCRb), an inlet temperature sensor (Tsi) that detects the temperature of the inlet (ILT) of the cavity (CAV), and an outlet temperature sensor (Tso) that detects the temperature of the outlet (OLT) of the cavity (CAV).

[0515] Meanwhile, since the space between the supercooling chamber (OCRb) and the cavity (CAV) is not sufficient compared to FIG. 15, the fan (FAa) can be placed inside the cavity (CAV).

[0516] Also, the inlet and outlet of the cavity (CAV) can be used as the inlet and outlet of the supercooling chamber (OCRb).

[0517] Accordingly, cold air from the freezer (RMF) is delivered to the inlet (ILT) of the cavity (CAV) via the outlet (ORF) for cold air output of the freezer (RMF) and the cold air supply duct (CSD).

[0518] Meanwhile, cold air from the outlet (OLT) of the cavity (CAV) is transferred to the cold air recovery duct (CRD) and the inlet (IRF) for cold air input to the cold room (RMF).

[0519] Meanwhile, the control unit (310) can control the supply of cold air supplied to the supercooling chamber (OCRb) by controlling the opening rate of the damper (DMP).

[0520] Next, FIG. 17 is a drawing illustrating an example of a supercooling chamber (OCRa) placed within a freezer room (RMF).

[0521] Referring to the drawing, the supercooling chamber (OCRa) may be provided with a cavity (CAV) in which an article (MAT) is placed and disposed within the supercooling chamber (OCRa), an inlet temperature sensor (Tsi) for detecting the temperature of the inlet (ILT) of the cavity (CAV), an outlet temperature sensor (Tso) for detecting the temperature of the outlet (OLT) of the cavity (CAV), a cold air supply device (180) for supplying or blocking cold air to the cavity (CAV), and a hot air supply device (190) for supplying or blocking hot air into the cavity (CAV). Accordingly, supercooling can be maintained efficiently using RF signals without the need for a temperature sensor to be placed within the cavity.

[0522] The cold air supply device (180) may include a fan (FAa) placed at the inlet (ILT) of the cavity (CAV).

[0523] Meanwhile, the control unit (310) can control the supply of cold air supplied to the cavity (CAV) by controlling the on / off of the fan (FAa).

[0524] The heat supply device (190) may include an RF output device (190) that outputs an RF signal. In particular, an antenna (ANT) for outputting an RF signal may be disposed on the upper part of the cavity (CAV).

[0525] Meanwhile, the supercooling chamber (OCRa) may further include a partition (BAR) separating the inlet (IOC) of the supercooling chamber (OCRa) and the outlet (OOC) of the supercooling chamber (OCRa).

[0526] Accordingly, cold air from the freezer (RMF) does not flow from the inlet (IOC) of the supercooling chamber (OCRa) toward the outlet (OOC) of the supercooling chamber (OCRa).

[0527] The cold room (RMF) may include a cold air output device (CSO), a damper (DMP), a cold air supply duct (CSD), and a cold air return duct (CRD).

[0528] Here, the cold air output device (CSO) may include a heat exchanger that has been heat-exchanged by a compressor drive, a fan that supplies cold air that has been heat-exchanged in the heat exchanger, or a thermoelectric module.

[0529] Cold air from the cold air output device (CSO) and damper (DMP) is delivered through the cold air supply duct (CSD) to the inlet (IOC) inside the subcooling chamber (OCRa).

[0530] Meanwhile, cold air from the outlet (OOC) in the supercooling chamber (OCRa) is transferred into the refrigeration chamber (RMF) through the cold air recovery duct (CRD).

[0531] Meanwhile, unlike the drawing, the damper (DMP) may be placed inside the supercooling chamber (OCRa).

[0532] It is desirable that the supercooling chamber (OCRa) be insulated from the outside and also insulated from the internal cavity (CAV). To this end, it is desirable that an insulating material be attached to the inner surface of the supercooling chamber (OCRa).

[0533] Meanwhile, it is desirable to attach insulation material to the inner surface of the cavity (CAV) as well.

[0534] Next, FIG. 18 is a drawing illustrating another example of a supercooling chamber (OCRa) placed within a freezer room (RMF).

[0535] Referring to the drawings, unlike the supercooling chamber (OCRb) of Fig. 17, the partition (BAR), etc., is not disclosed in the supercooling chamber (OCRa) of Fig. 18.

[0536] Referring to the drawing, the supercooling chamber (OCRb) is provided with a cavity (CAV) in which an article (MAT) is placed and which is disposed within the supercooling chamber (OCRb), an inlet temperature sensor (Tsi) that detects the temperature of the inlet (ILT) of the cavity (CAV), and an outlet temperature sensor (Tso) that detects the temperature of the outlet (OLT) of the cavity (CAV).

[0537] Meanwhile, since the space between the supercooling chamber (OCRb) and the cavity (CAV) is not sufficient compared to FIG. 17, the fan (FAa) can be placed inside the cavity (CAV).

[0538] Also, the inlet and outlet of the cavity (CAV) can be used as the inlet and outlet of the supercooling chamber (OCRb).

[0539] Accordingly, cold air from the cold air output device (CSO) and the damper (DMP) is delivered to the inlet (ILT) of the cavity (CAV) via the outlet (ORF) for cold air output of the cold room (RMF) and the cold air supply duct (CSD).

[0540] Meanwhile, cold air from the outlet (OLT) of the cavity (CAV) is transferred to the cold air recovery duct (CRD) and then to the cold room (RMF).

[0541] FIG. 19 is a drawing illustrating an example of a supercooling chamber (OCRa) according to an embodiment of the present invention.

[0542] Referring to the drawings, the supercooling chamber (OCRa) according to an embodiment of the present invention may be provided as a separate module within the refrigerator (100) rather than being provided within the refrigerator or freezer.

[0543] Referring to the drawings, the supercooling chamber (OCRa) may be provided with a cavity (CAV) in which an article (MAT) is placed and which is positioned within the supercooling chamber (OCRa), similar to FIG. 15 or FIG. 17, an inlet temperature sensor (Tsi) that detects the temperature of the inlet (ILT) of the cavity (CAV), an outlet temperature sensor (Tso) that detects the temperature of the outlet (OLT) of the cavity (CAV), a cold air supply device (180) that supplies or blocks cold air to the cavity (CAV), and a hot air supply device (190) that supplies or blocks hot air into the cavity (CAV). Accordingly, supercooling can be maintained efficiently using RF signals without the need for a temperature sensor to be positioned within the cavity.

[0544] The cold air supply device (180) may include a fan (FAa) placed at the inlet (ILT) of the cavity (CAV).

[0545] Meanwhile, the control unit (310) can control the supply of cold air supplied to the cavity (CAV) by controlling the on / off of the fan (FAa).

[0546] The heat supply device (190) may include an RF output device (190) that outputs an RF signal. In particular, an antenna (ANT) for outputting an RF signal may be disposed on the upper part of the cavity (CAV).

[0547] Meanwhile, the supercooling chamber (OCRa) may further include a partition (BAR) separating the inlet (IOC) of the supercooling chamber (OCRa) and the outlet (OOC) of the supercooling chamber (OCRa).

[0548] Accordingly, cold air from the freezer (RMF) does not flow from the inlet (IOC) of the supercooling chamber (OCRa) toward the outlet (OOC) of the supercooling chamber (OCRa).

[0549] Meanwhile, cold air from the cold air output device (CSO) and damper (DMP) is delivered to the inlet (IOC) inside the subcooling chamber (OCRa) via the cold air supply duct (CSD).

[0550] Meanwhile, cold air from the outlet (OOC) in the supercooling chamber (OCRa) is transferred into the refrigeration chamber (RMF) through the cold air recovery duct (CRD).

[0551] FIG. 20 is a drawing illustrating another example of an OCRb according to an embodiment of the present invention.

[0552] Referring to the drawings, the supercooling chamber (OCRb) according to an embodiment of the present invention may be provided as a separate module within the refrigerator (100) rather than being provided within the refrigerator or freezer.

[0553] Referring to the drawings, unlike the supercooling chamber (OCRb) of FIG. 19, the supercooling chamber (OCRa) of FIG. 20 does not have a partition (BAR), etc.

[0554] Referring to the drawing, the supercooling chamber (OCRb) is provided with a cavity (CAV) in which an article (MAT) is placed and which is disposed within the supercooling chamber (OCRb), an inlet temperature sensor (Tsi) that detects the temperature of the inlet (ILT) of the cavity (CAV), and an outlet temperature sensor (Tso) that detects the temperature of the outlet (OLT) of the cavity (CAV).

[0555] Meanwhile, since the space between the supercooling chamber (OCRb) and the cavity (CAV) is not sufficient compared to FIG. 17, the fan (FAa) can be placed inside the cavity (CAV).

[0556] Also, the inlet and outlet of the cavity (CAV) can be used as the inlet and outlet of the supercooling chamber (OCRb).

[0557] Accordingly, cold air from the cold air output device (CSO) and the damper (DMP) is delivered to the inlet (ILT) of the cavity (CAV) via the outlet (ORF) for cold air output of the cold room (RMF) and the cold air supply duct (CSD).

[0558] Meanwhile, cold air from the outlet (OLT) of the cavity (CAV) is transferred to the cold air recovery duct (CRD) and then to the cold room (RMF).

[0559] Meanwhile, the supercooling control method described in FIGS. 9 to 15 can also be applied to the structures of the various supercooling chambers of FIGS. 15 to 20.

[0560] The refrigerator according to the present invention is not limited to the configuration and method of the embodiments described above; rather, all or part of each embodiment may be selectively combined to allow for various modifications to be made.

[0561] Furthermore, although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above. Various modifications are possible by those skilled in the art without departing from the essence of the invention as claimed in the claims, and such modifications should not be understood individually from the technical spirit or perspective of the present invention.

Claims

Claim 1 A first storage chamber in which an article is stored; a cavity disposed inside the first storage chamber; a heat source for supplying heat into the cavity; a cold source for supplying cold air into the cavity; a means for preventing water contained in the article from freezing; and a control unit for controlling the output of at least one of the heat source, the cold source, and the means for preventing water from freezing. The control unit controls the operation such that, during a first period, a first operation step is operated based on a first notch temperature for cooling operation of the first storage chamber; during a second period after the first period, a second operation step is operated based on a second notch temperature for heating operation of the first storage chamber; and during a third period after the second period, a third operation step is operated based on a third notch temperature for cooling operation of the first storage chamber is performed, and during a fourth period after the third period, while cold air is continuously supplied to the first storage chamber A refrigerator characterized by the repeated supply and off of heat, wherein the first heat supply period within the fourth section is longer than other heat supply periods, the second notch temperature is a value higher than 0℃, and the third notch temperature is a value lower than the first notch temperature. Claim 2 A refrigerator according to claim 1, wherein the cold source comprises: an evaporator that performs heat exchange using a refrigerant compressed in a compressor; and a fan that operates to supply cold air generated by heat exchange in the evaporator to the first storage room. Claim 3 A refrigerator according to claim 1, wherein the cold source further comprises a thermoelectric element; and a fan that operates to supply cold air generated by heat exchange at the heat-absorbing surface of the thermoelectric element to the cavity. Claim 4 A refrigerator according to claim 1, characterized in that the heat source comprises at least one of a heater and an RF output device. Claim 5 A refrigerator according to claim 1, wherein the water molecule freezing interference means comprises at least one of an RF output device, an electric field output device, a magnetic field output device, and an ultrasonic output device. Claim 6 A refrigerator according to claim 1, wherein the operating mode of the first storage room is variable, and the operating mode includes at least one of a refrigeration operating mode, a supercooling operating mode, and a defrosting mode. Claim 7 A refrigerator according to claim 6, characterized in that the notch temperature of the first storage chamber during the refrigeration operation mode is higher than the notch temperature of the first storage chamber during the supercooling operation mode. Claim 8 A refrigerator according to claim 6, characterized in that the notch temperature of the first storage chamber during the refrigeration operation mode is lower than the notch temperature of the first storage chamber during the heating operation mode. Claim 9 A refrigerator characterized by further including, in claim 1, a second storage room disposed on the outside of the first storage room. Claim 10 A refrigerator according to claim 9, characterized in that the notch temperature of the second storage room is higher than the notch temperature for cooling operation of the first storage room. Claim 11 A refrigerator according to claim 1 or 9, further comprising a third storage room; wherein the notch temperature for the third storage room is lower than the notch temperature for cooling operation of the first storage room. Claim 12 A refrigerator according to claim 1, wherein the control unit controls the output of the water molecule freezing inhibition means to be greater during the second operation step than during the first operation step. Claim 13 A refrigerator according to claim 1, wherein the control unit controls the output of the water molecule freezing inhibition means such that it is greater or equal to the output during the third operation step than during the first operation step. Claim 14 A refrigerator according to claim 1, wherein the control unit controls the operation to further perform a fourth operation step based on a fourth notch temperature for heating operation of the first storage room. Claim 15 A refrigerator according to claim 14, characterized in that the fourth notch temperature is a value higher than 0℃. Claim 16 A refrigerator according to claim 14, wherein the control unit controls the fourth notch temperature to be higher than the second notch temperature when the time elapsed from the point in time when the operation start condition of the second operation step is satisfied until the point in time when the operation end condition of the second operation step is satisfied exceeds a predetermined range. Claim 17 A refrigerator according to claim 14, wherein the control unit controls the fourth notch temperature and the second notch temperature to be the same if the time elapsed from the point in time when the operation start condition of the second operation stage is satisfied until the point in time when the operation end condition of the second operation stage is satisfied is within a predetermined range. Claim 18 A refrigerator according to claim 14, wherein the control unit controls the fourth notch temperature to be lower than the second notch temperature if the time elapsed from the point in time when the operation start condition of the second operation step is satisfied until the point in time when the operation end condition of the second operation step is satisfied is less than a predetermined range. Claim 19 A refrigerator according to claim 14, wherein the control unit controls the temperature of the first storage room to be higher than the second notch temperature when the temperature of the first storage room exceeds a predetermined range from the time when the operating start condition of the second operating stage is satisfied to the time when the operating end condition of the second operating stage is satisfied. Claim 20 A refrigerator according to claim 14, wherein the control unit controls the temperature of the first storage room to be the same as the fourth notch temperature and the second notch temperature when the temperature of the first storage room is within a predetermined range from the time when the operating start condition of the second operating stage is satisfied to the time when the operating end condition of the second operating stage is satisfied. Claim 21 A refrigerator according to claim 14, wherein the control unit controls the temperature of the first storage room to be lower than the second notch temperature when the temperature of the first storage room is below a predetermined range from the time when the operating start condition of the second operating stage is satisfied to the time when the operating end condition of the second operating stage is satisfied. Claim 22 A first storage chamber in which an article is stored; a cavity disposed inside the first storage chamber; a heat source for supplying heat into the cavity; a cold source for supplying cold air into the cavity; a means for preventing water contained in the article from freezing; and a control unit for controlling the output of at least one of the heat source, the cold source, and the means for preventing water from freezing. The control unit controls the operation such that, during a first period, a first operation step is operated based on a first notch temperature for cooling operation of the first storage chamber; during a second period after the first period, a second operation step is operated based on a second notch temperature for heating operation of the first storage chamber; and during a third period after the second period, a third operation step is operated based on a third notch temperature for cooling operation of the first storage chamber is performed, and during a fourth period after the third period, while cold air is continuously supplied to the first storage chamber A refrigerator in which the supply and off of heat are repeated, the first heat supply period within the fourth section is longer than other heat supply periods, and the total amount of cold supplied to the first storage room in the third operating stage is controlled to be greater than the total amount of cold supplied to the first storage room in the first operating stage.

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