Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D23/00—General constructional features
  • F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
  • F25D23/126—Water cooler
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
  • F25D21/06—Removing frost
  • F25D21/08—Removing frost by electric heating
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D23/00—General constructional features
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D2323/00—General constructional features not provided for in other groups of this subclass
  • F25D2323/02—Details of doors or covers not otherwise covered
  • F25D2323/023—Door in door constructions
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D2331/00—Details or arrangements of other cooling or freezing apparatus not provided for in other groups of this subclass
  • F25D2331/80—Type of cooled receptacles
  • F25D2331/803—Bottles
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
  • F25D2400/02—Refrigerators including a heater

Definitions

• the present invention relates to a supercooling apparatus which can maintain an object in a supercooled state, and more particularly, to a supercooling apparatus which can maintain water in a supercooled state, wherein, when a user imparts an impact to a container containing water, water in the container is phase-transited into a slush state where ice crystals and liquid coexist.
• the present invention relates to a supercooling apparatus applied to a freezing chamber of a general refrigerator so as to maintain water in a supercooled state.
• Supercooling means a phenomenon where a molten object or a solid cooled to below a phase transition temperature in a balanced state is not changed.
• a material has stable states by temperatures. In a case where a temperature is slowly changed, elements composing the material keep pace with the temperature variations, maintaining stable states at each temperature. However, in a case where the temperature is sharply changed, the elements can not enter stable states at each temperature. Therefore, the elements maintain a stable state of a start point temperature, or some of the elements fail to enter a state of a final point temperature.
• This technology adopts the supercooling phenomenon. According to the supercooling phenomenon, although a molten object or a solid is cooled below a phase transition temperature in a balanced state, it is not changed.
• Examples using the technology include an electrostatic field processing method, an electrostatic field processing apparatus, and electrodes therefor in Korean Laid-Open Patent 2000-0011081.
• FIG. 1 is a view illustrating an implementation of a conventional thawing and freshness-keeping apparatus.
• a heat insulation apparatus 1 is constructed by a heat insulating material 2 and an outer wall 5.
• a temperature control device (not shown) is installed in the apparatus 1.
• a metal shelf 7 installed in the apparatus 1 has a two- layered structure. Vegetable, meat and marine products are mounted on each layer to be thawed or freshness-kept and ripened.
• the metal shelf 7 is insulated from the bottom of the apparatus 1 by an insulator 9.
• a high voltage generation device 3 can generate 0 to 5000 V of DC and AC voltages.
• an insulation plate 2a such as vinyl chloride is coated on the inside of the heat insulating material 2.
• a high voltage cable 4 for outputting the voltage of the high voltage generation device 3 passes through the outer wall 5 and the heat insulating material 2 to be connected to the metal shelf 7.
• a safety switch 13 (not shown; refer to FIG. 2) is turned off to block the output of the high voltage generation device 3.
• FIG. 2 is a circuit view illustrating a circuit configuration of the high voltage generation device 3.
• 100 V of AC is supplied to a primary side of a voltage regilation transformer 15.
• Reference numeral 11 denotes a power lamp and 19 denotes an operation state indication lamp.
• a relay 14 is operated.
• the operation state of the relay 14 is displayed by a relay operation lamp 12.
• Relay contact points 14a, 14b and 14c are closed by the operation of the relay 14, and 100 V of AC is applied to the primary side of the voltage regilation transformer 15.
• the applied voltage is regulated by an regilation knob 15a on a secondary side of the voltage regulation transformer 15.
• the regilated voltage value is displayed on a voltmeter.
• the regulation knob 15a is connected from the secondary side of the voltage regilation transformer 15 to a primary side of a boosting transformer 17.
• the boosting transformer 17 boosts a voltage at a ratio of 1 : 50. If 60 V of voltage is applied, the voltage is boosted to 3000 V.
• One end O of an output on the secondary side of the boosting transformer 17 is connected to the metal shelf 7 insulated from the heat insulation apparatus 1 through the high voltage cable 4, and the other end O of the output is grounded. Since the outer wall 5 is grounded as well, even if the user touches the outer wall 5 of the heat insulation apparatus 1, he/she does not get an electric shock. In addition, when the metal shelf 7 is exposed in the apparatus 1 as shown in FIG. 1, the metal shelf 7 needs to be maintained in an insulated state in the apparatus 1, and thus needs to be separated from an inner wall of the apparatus 1 (air functions as an insulator).
• An object of the present invention is to provide a supercooling apparatus which can prevent liquid from being frozen at a temperature below a freezing point.
• Another object of the present invention is to provide a supercooling apparatus which can be applied to a structure of a general refrigerator so as to maintain liquid contained in food or liquid in a supercooled state in the refrigerator.
• a further object of the present invention is to provide a supercooling apparatus which can maintain an object (or food) in a supercooled state in a refrigeration apparatus with a simple configuration and low power.
• a still further object of the present invention is to provide a supercooling apparatus which can maintain an entire object in a supercooled state by locally heating a freezing portion of the object in a process of freezing the object in a container.
• a supercooling apparatus including: a cooling chamber supplied with cool air; and a heating device for preventing freezing of water by heating air over a container storing an object mostly composed of liquid or liquid and cooled in the cooling chamber.
• the air over the container where ice crystals are easily formed is heated to prevent freezing of the liquid stored in the container and store the liquid in a supercooled state.
• food containing a large amount of moisture, such as kimchi or watery radish kimchi can be freshly maintained for an extended period of time.
• the heating device includes a main body formed in the shape of a cylinder with at least one open face. In this con- figiration, the heating device can be easily coupled to an upper portion of the water storage container mostly formed in a circular shape.
• the heating device includes a heating wire to heat the container or the air which is in contact with the main body. In this configuration, the heating device can safely heat only the air over the storage container.
• the heating device includes an inductor spaced apart from an upper portion of the main body, and the main body is made of metal.
• the heating device is attached and detached to/from the container.
• a user can maintain an object or liquid of a target container in a supercooled state.
• the main body is formed to surround a top and/or a side surface of the container.
• the heating device includes a sealing member positioned at a lower portion of the cylinder-shaped main body to seal up the container and the heating device.
• cooling efficiency of the supercooling apparatus can be improved and power consumption for maintaining the supercooling can be reduced by intercepting the air of the heating device with a relatively high temperature and the air of the cooling chamber with a relatively low temperature.
• the sealing member is an adhesive pad.
• the sealing member can reliably seal up the heating device and the container and can be recycled a few times.
• the supercooling apparatus includes: a door for opening and closing the cooling chamber; and a separate room, which is a part of the cooling chamber, positioned on the door and opened and closed by a portion of the door.
• the user can take out an object stored in the separate room of the cooling chamber to the outside of the cooling chamber without opening the door.
• the heating device is positioned in the separate room. In this configuration, in a state where the cooling chamber is rarely affected by the heating device, the user can conveniently take out liquid and food stored in a supercooled state from the cooling chamber.
• the cooling chamber includes a refrigerating chamber and a freezing chamber, and the heating device is positioned in the freezing chamber.
• liquid stored in the container can be stored at a temperature lower than a temperature of a maximum ice crystal formation zone without defining a separate cool air passage.
• a supercooling apparatus including: a cooling chamber for maintaining a cooling state at a temperature below zero; a container for storing an object mostly composed of liquid or liquid in the cooling chamber; and a heating device for preventing freezing of the liquid in at least a portion contacting the container containing the object or liquid.
• a supercooling apparatus including: a cooling chamber for maintaining a cooling state at a temperature below zero; a container for storing an object mostly composed of liquid or liquid in the cooling chamber; a heating device for preventing freezing of the liquid in the container; and a control device for controlling a temperature of the heating device to be over zero.
• the supercooling apparatus further includes: a door for opening and closing the cooling chamber; and a separate room, which is a part of the cooling chamber, positioned on the door and opened and closed by a portion of the door, wherein the container and the heating device are positioned in the separate room.
• a user can take out food or liquid stored in a supercooled state without opening the door of the cooling chamber.
• the heating device is attached and detached to/from the container.
• the user can separate the heating device and take out the container, selectively attach the heating device to the container, and decide whether to maintain foods stored in the respective containers in the supercooled state.
• the heating device further includes a sealing member formed at a lower portion of the heating device to seal up a gap between the container and the heating device, when the heating device is attached to the container.
• a sealing member formed at a lower portion of the heating device to seal up a gap between the container and the heating device, when the heating device is attached to the container.
• a supercooling apparatus including: a first storage space maintained in a temperature range below zero; a second storage space maintained in a temperature range higher than the temperature range of the first storage space; and a container positioned over the first and second storage spaces to store an object mostly composed of liquid or liquid.
• the supercooling apparatus maintains the object or liquid of the container in a supercooled state.
• the second storage space is maintained in a temperature range higher than a temperature range of a maximum ice crystal formation zone, or maintained in a normal temperature range. In this configiration, heat energy is applied to easily maintain the liquid and object in the supercooled state.
• the second storage space is positioned in the first storage space, and sealed up with respect to the first storage space.
• the second storage space is hermetically sealed to keep a constant temperature of maintaining the object and liquid in the supercooled state, the supercooled state can be provided with minimum energy and high reliability.
• a supercooling apparatus can be easily applied to a general refrigerator without changing a structure of the refrigerator.
• a supercooling apparatus can store water in a supercooled state below a phase transition temperature without freezing water.
• a supercooling apparatus can transit water stored in a supercooled state into a slush state by slight physical stimulation of a user.
• FIG. 1 is a view illustrating an implementation of a conventional thawing and freshness-keeping apparatus
• FIG. 2 is a circuit view illustrating a circuit configuration of a high voltage generation device
• FIG. 3 is a view illustrating a process of forming ice crystal cores in cooled liquid
• FIG. 4 is a view illustrating a process of preventing ice crystal core formation in a supercooling apparatus according to the present invention
• FIG. 5 is a graph showing a supercooled state of water by FIG. 4;
• FIGS. 6 and 7 are views illustrating a heating device provided in a supercooling apparatus according to a first embodiment of the present invention
• FIG. 8 is a view illustrating a heating device provided in a supercooling apparatus according to a second embodiment of the present invention.
• FIG. 9 is a view illustrating a supercooling apparatus according to one embodiment of the present invention. Mode for the Invention
• FIG. 3 is a view illustrating a process of forming ice crystal cores in cooled liquid.
• a container C containing liquid L is cooled in a cooling space S.
• a cooling temperature of the cooling space S is lowered from a normal temperature to a temperature below 0 0 C (a phase transition temperature of water) or a phase transition temperature of the liquid L. While the cooling is carried out, it is intended to maintain the water or liquid L in a supercooled state below a temperature (-1 to -5 0 C) of a maximim ice crystal formation zone of water where ice crystal formation is maximized, or below a temperature of a maximim ice crystal formation zone of the liquid L.
• the container C may selectively include the cover Ck. If the container C includes the cover Ck, it is possible to prevent direct inflow of cool air from the cooling space S, or to prevent a temperature of a surface Ls of the liquid L or a temperature of the gas Lg on the surface Ls of the liquid L from being lowered due to cool air.
• the cooling temperature reaches or exceeds the temperature of the maximum ice crystal formation zone of the liquid L
• the liquid L forms ice crystal cores Fl in the gas Lg or ice crystal cores F2 on an inner wall of the container C. Otherwise, the liquid L is condensed in a contact portion between the surface Ls of the liquid L and the inner wall of the container C (almost same as the cooling temperature of the cooling space S).
• the condensed liquid L may form ice crystal cores F3.
• FIG. 4 is a view illustrating a process of preventing ice crystal core formation in a supercooling apparatus according to the present invention.
• the temperature of the gas Lg or the surface Ls of the liquid L is set higher than the temperature of the maximum ice crystal formation zone of the liquid L, preferably, higher than the phase transition temperature of the liquid L.
• the temperature of the surface Ls of the liquid L is set higher than the temperature of the maximum ice crystal formation zone of the liquid L, preferably, higher than the phase transition temperature of the liquid L.
• the liquid L in the container C maintains the supercooled state below the phase transition temperature or the maximum ice crystal formation zone temperature thereof.
• FIG. 5 is a graph showing the supercooled state of water by FIG. 4.
• FIG. 5 shows temperatures measured under the principle of FIG. 4, in a case where the liquid L is water.
• line I is a cooling temperature curve of the cooling space S
• line II is a temperature curve of the gas Lg (air) on the surface of water in the container C
• line III is a temperature curve of an outer surface of the container C.
• the temperature of the outer surface of the container C is substantially identical to the temperature of water in the container C.
• FIGS. 6 and 7 are views illustrating a heating device provided in a supercooling apparatus according to a first embodiment of the present invention.
• a heating device 100 is attached to an upper portion of a container 200 stored in a cooling chamber so as to prevent ice crystal formation of liquid stored in the container 200.
• the heating device 100 includes a main body 110 formed in the shape of a container such as a cylinder, bell, circular truncated cone, etc., with one open side, a heating wire 120 attached to an inner or outer surface of the main body 110, and a sealing member 130 for helping the main body 110 and the container 200 to be attached to each other, and preventing hot air of the main body 110 and cool air of the cooling chamber from being mixed with each other.
• a heating wire fixing member 122 for helping the heating wire 120 to be attached and fixed to the main body 110 is further provided at an upper portion of the main body 110.
• the main body 110 may be formed in various sizes.
• the supercooling apparatus may include a plurality of heating devices 100, e.g., a heating device 100 having a main body 110 with a small inner diameter according to a size of a container 200 storing liquid, and a heating device 100 having a main body 110 with a large inner diameter according to a size of a container 200 storing kimchi containing a large amount of liquid, etc..
• the container 200 accommodates liquid, and an object mostly composed of liquid or containing liquid at a high rate. The liquid and object are maintained in a supercooled state due to a heating operation of the heating device 100 and a cooling operation of the cooling chamber.
• the heating device 100 heats the air existing in an inner space 140 of the heating device 100, i.e., in a space over the container 200.
• the heating device 100 can prevent freezing of vapor on a surface of the liquid and freezing on an inner wall of the container adjacent to the surface of the liquid. Accordingly, the heating device 100 can be installed in a cooling chamber of a general refrigerator to maintain liquid in a supercooled state without modifying a structure of the refrigerator.
• the main body 110 should be sufficiently deep to surround the container 200 so as to heat at least an upper portion of the container 200.
• the depth of the main body 110 is set to heat the air over the object or liquid contained in the container 200, i.e., to apply most or entire heat energy to the upper portion of the object or liquid.
• a temperature of the object or liquid e.g., an average temperature or a central point temperature of the object or liquid
• the main body 110 preferably applies heat energy through a top of the container 200 and a side surface adjacent to the top.
• the depth of the main body 110 is preferably set to be equivalent to a depth of an air layer on the object or liquid in the container 200, or a depth of a top surface of the object or liquid.
• the depth of the main body 110 surrounding the container 200 may be actively varied according to a height of the object or liquid in the container 200. Otherwise, a height of an object or liquid that can be contained in the general container 200 is estimated, and the main body 100 has a depth equivalent to the estimated height, i.e., a fixed depth.
• the heating device 100 includes the sealing member 130 positioned at a lower portion of the main body 110, i.e., a portion being in contact with the container 200, thereby sealing up the inner space 140 from the cooling chamber.
• the sealing member 130 may be an adhesive pad (e.g., a rubber pad) with an excellent adhesion property. In the first embodiment of the present invention of FIGS. 6 and 7, the sealing member 130 is the adhesive pad.
• the main body 110 can be attached and detached to/from the top and side surface of the container 200.
• the inner space 140 surrounded by the main body 110 is sealed up by the sealing member 140.
• FIG. 8 is a view illustrating a heating device provided in a supercooling apparatus according to a second embodiment of the present invention.
• a heating device 100 for heating a container for storing liquid is embodied by means of an induction heater principle.
• the heating device 100 includes an inductor 150 positioned over a container storage space, a main body 110 made of metal to cover an upper portion of the container, and a sealing member 130 for adhering and sealing up the main body 110 and the container.
• the inductor 150 is spaced apart from the upper portion of the main body 110 to induction-heat the main body 110 by eddy current.
• the main body 110 is heated to raise a temperature of air existing over the container coupled to the inside of the main body 110, thereby preventing ice crystal formation. Moreover, since power supply for the main body 110 is not necessary in use of the inductor 150, the main body 110 can be freely moved.
• the sealing member 130 is a ring-shaped member made of an elastic material, such as rubber. The sealing member 130 may be formed in a corrugated shape to improve heat insulation and elasticity.
• FIG. 9 is a view illustrating a supercooling apparatus according to one embodiment of the present invention.
• a supercooling apparatus 1000 is entirely similar in structure to a general refrigerator.
• the supercooling apparatus 1000 includes a cooling chamber composed of a freezing chamber 1100 and a refrigerating chamber 1200, and a freezing chamber door 1300 and a refrigerating chamber door 1400 for opening and closing the freezing chamber 1100 and the refrigerating chamber 1200, respectively.
• the freezing chamber door 1300 and the refrigerating chamber door 1400 include separate doors 1310 and 1410, respectively, so that a user can put in and take out an object on the outside without opening the freezing chamber door 1300 and the refrigerating chamber door 1400.
• the separate doors 1310 and 1410 are parts of the freezing chamber door 1300 and the refrigerating chamber door 1400, respectively.
• a separate space opened and closed by the separate door 1410 formed on the refrigerating chamber door 1400 is generally called a home bar.
• a separate chamber 1110 opened and closed by the separate door 1310 formed on the freezing chamber door 1300 is used for supercooling storage.
• a heating device 100 is positioned in the separate chamber 1110. As described above, the heating device 100 is attached to an upper portion of a container 200 to raise a temperature of air existing over the container 200, thereby preventing ice crystal formation of liquid. In this configuration, the user can easily take out the container 200 storing supercooled liquid or food containing supercooled liquid on the outside without opening the freezing chamber door 1300.
• the supercooling apparatus 1000 including the home bar has been explained by way of example. However, the present invention can be implemented into a supercooling apparatus 1000, wherein a heating device 100 is not positioned on the side of a freezing chamber door 1310 but in a cooling chamber.
• the heating device 100 of FIGS. 6 and 7, the heating device of FIG. 8 and the heating device 100 of FIG. 9 are controlled by a microcomputer (or control device; not shown) of the refrigerator, and supplied with power by a power device of the refrigerator.
• the microcomputer controls application and interception of power with respect to the heating device 100.
• the microcomputer controls a temperature of preventing ice core formation by adjusting the size of the applied power (level and frequency of a voltage) and heating the inner space 140 and the air layer in the container 200 by means of the heating device 100. That is, as the microcomputer controls heat energy generated by the heating device 100, it can adjust temperatures of the inner space 140 and the air layer in the container 200.
• the microcomputer controls the heating device 100 to maintain a temperature over zero, so that the temperature of the air layer in the container 200 corresponding in position to the heating device 100 can be maintained over a temperature range of a maximum ice crystal formation zone.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Thermal Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Devices That Are Associated With Refrigeration Equipment (AREA)
• Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

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• 2007
  • 2007-09-14 KR KR1020070093894A patent/KR101439540B1/ko active IP Right Grant
• 2008
  • 2008-03-11 US US12/673,960 patent/US20100242524A1/en not_active Abandoned
  • 2008-03-11 EP EP08723413A patent/EP2188580A4/de not_active Withdrawn
  • 2008-03-11 CN CN2008801045106A patent/CN101970963B/zh active Active
  • 2008-03-11 WO PCT/KR2008/001376 patent/WO2009035195A2/en active Application Filing

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