WO2011010831A2 - Defrosting assembly, refrigerator having the same, and method for controlling the same - Google Patents

Defrosting assembly, refrigerator having the same, and method for controlling the same Download PDF

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Publication number
WO2011010831A2
WO2011010831A2 PCT/KR2010/004625 KR2010004625W WO2011010831A2 WO 2011010831 A2 WO2011010831 A2 WO 2011010831A2 KR 2010004625 W KR2010004625 W KR 2010004625W WO 2011010831 A2 WO2011010831 A2 WO 2011010831A2
Authority
WO
WIPO (PCT)
Prior art keywords
defrosting
thermoelectric module
food
thermoelectric
controlling
Prior art date
Application number
PCT/KR2010/004625
Other languages
English (en)
French (fr)
Other versions
WO2011010831A3 (en
Inventor
Nam Gyo Lee
Kyung Seok Kim
Original Assignee
Lg Electronics Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lg Electronics Inc. filed Critical Lg Electronics Inc.
Publication of WO2011010831A2 publication Critical patent/WO2011010831A2/en
Publication of WO2011010831A3 publication Critical patent/WO2011010831A3/en

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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
    • F25D31/00—Other cooling or freezing apparatus
    • F25D31/005—Combined cooling and heating devices
    • 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
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B7/00—Preservation or chemical ripening of fruit or vegetables
    • A23B7/04—Freezing; Subsequent thawing; Cooling
    • A23B7/045—Thawing subsequent to freezing
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/36—Freezing; Subsequent thawing; Cooling
    • A23L3/365—Thawing subsequent to freezing
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B21/00—Machines, plants or systems, using electric or magnetic effects
    • F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
    • 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
    • F25D23/02—Doors; Covers
    • 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
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
    • F25D25/024—Slidable shelves
    • F25D25/025—Drawers
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
    • F25B2321/02—Details of machines, plants or systems, using electric or magnetic effects using Peltier effects; using Nernst-Ettinghausen effects
    • F25B2321/023—Mounting details thereof
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
    • F25B2321/02—Details of machines, plants or systems, using electric or magnetic effects using Peltier effects; using Nernst-Ettinghausen effects
    • F25B2321/025—Removal of heat
    • F25B2321/0251—Removal of heat by a gas
    • 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
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • F25D17/045—Air flow control arrangements
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/068—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans
    • F25D2317/0681—Details thereof
    • 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
    • F25D2400/30—Quick freezing

Definitions

  • a defrosting assembly, a refrigerator having the same, and a method for controlling the same are disclosed herein.
  • a defrosting assembly, a refrigerator having the same, and a method for controlling the same are known. However, they suffer from various disadvantages.
  • a refrigerator is a home appliance that refrigerates or freezes food.
  • the refrigerator may comprise many parts which drive a refrigeration cycle.
  • the refrigerator may be an appliance that maintains freshness of the food kept in a food storage chamber by cooling the food storage chamber using chilled air generated by the refrigeration cycle.
  • the conventional refrigerator has a food storage chamber configured only for cooling or freezing food, it suffers from the disadvantage that a user must pull frozen food from the food storage chamber to defrost in the kitchen. Defrosting food in this manner not only takes a long time, but also pollutes the kitchen while defrosting.
  • a refrigerator is disclosed herein, and more particularly, a refrigerator having a food defrosting chamber divided from a food storage chamber, and further comprising a food defrosting device positioned in, and removable from, the food defrosting chamber for performing the defrosting or cooling functions in a single space by supplying heat to an inside of the food defrosting device in a defrosting mode, and by supplying chilled air from an outside of the food defrosting device in a general cooling mode or a rapid cooling mode, using a thermoelectric module.
  • Fig. 1 is a front perspective view of inner structure of a refrigerator according to an embodiment
  • Fig. 2 is a top exploded perspective view of a food defrosting device and a thermoelectric module according to embodiments;
  • Fig. 3 is an exploded perspective view of a thermoelectric module according to an embodiment
  • Fig. 4 is another top perspective view of the food defrosting device and the thermoelectric module according to embodiments.
  • Fig. 5 is a flow chart of a method for controlling a defrosting assembly of a refrigerator according to an embodiment.
  • Fig. 1 is a front perspective view of inner structure of a refrigerator according to an embodiment.
  • Fig. 2 is a top exploded perspective view of a food defrosting device and a food defrosting chamber according to embodiments.
  • Fig. 3 is an exploded perspective view of thermoelectric module according to an embodiment 40.
  • Fig. 4 is another top perspective view of the food defrosting device and the thermoelectric module according to additional embodiments.
  • Fig. 5 is a flow chart of a method of controlling a defrosting assembly of a refrigerator according to an embodiment.
  • a refrigerator 1 may include a body 10, which may be arranged perpendicularly to a floor of a kitchen or a living room, and a first door 12A and a second door 12B, which may be arranged to rotate at first and second sides of a front side of the body 10 in order to open a food storage chamber 15 positioned on an inside of the body 10.
  • the food storage chamber 15 may include a space for users to store and maintain the freshness of food.
  • the food storage chamber 15 may include an upper section and a lower section. Further, the food storage chamber 15 may include a frozen food storage chamber and a refrigerated food storage chamber as the upper or lower sections.
  • the food storage chamber 15 may also include a lower food storage chamber 14, which may be configured as a gimchi storage chamber or a vegetable storage chamber to store perishable foods, for example, gimchi or vegetables.
  • a food defrosting chamber 20 may be divided from the upper section or the lower section of the food storage chamber 15.
  • the food defrosting chamber 20 may be configured to rapidly defrost frozen food.
  • a front side of food defrosting chamber 20 may be formed to be open and may be configured to receive a food defrosting device 30, as shown in Fig. 1.
  • the food defrosting device 30 may be configured to be placed in, and removed from, the food defrosting chamber 20.
  • the food defrosting device 30 may have a rectangular shape configured to slide backwards and forwards into and out of the food defrosting chamber 20, as shown in Fig. 2.
  • a handle 31 may be provided on a front surface of the food defrosting device 30, to be used by users to slide the food defrosting device 30 into and out of the food defrosting chamber 20. Further, the food defrosting device 30 may have an open upper side and a receiving space 32, which may be configured to store therein food to be defrosted.
  • the refrigerator 1 may include a thermoelectric module 40 positioned in the food defrosting chamber 20 and configured to supply heat to an inside of the food defrosting device 30 and to remove heat from outside of the food defrosting device 30. Further, a damper 35 may be positioned on the food defrosting device 30, configured to open and close an opening hole 33 on the food defrosting device 30.
  • the thermoelectric module 40 may supply heat to the inside of the food defrosting device 30.
  • the thermoelectric module 40 may include a thermoelectric plate 41, a heat sink plate 42, and a fan 43.
  • the thermoelectric plate 41 which may be mounted in the food defrosting chamber 20, may generate heat on a front side of the thermoelectric plate 41 while generating chilled air on a back side of the thermoelectric plate 41.
  • the thermoelectric plate 41 may generate heat on one surface by electric force, while absorbing heat, that is cooling, on the opposite surface.
  • the heat sink plate 42 may be positioned on a front surface of the thermoelectric plate 41 to absorb and diffuse the heat generated by the thermoelectric plate 41.
  • the fan 43 which may be positioned on the front side of the heat sink plate 42, may blow the diffused heat away from the heat sink plate 42 and circulate the air into the food defrosting device 30.
  • the thermoelectric module 40 may operate through thermoelectric heating and cooling principles using the Peltier effect, which is well known in the art.
  • the process may employ applying a voltage to a thermoelectric semiconductor material of two different types, for example, a P-type and a N-type. Heat generated through this process may be harnessed on the thermoelectric plate 41 and diffused into the heat sink plate 42.
  • the heat sink plate 42 may include a plurality of pins 42A, or fins, that increase a heat transfer coefficient. The heat may be transferred to the heat sink plate 42, which may then be blown away by the fan 43. More particularly, the fan 43 may circulate the heat stored on the heat sink plate 42 into the food defrosting device 30 to defrost the frozen food.
  • the damper 35 may be positioned on the opening hole 33 provided in the food defrosting device 30, and may be configured to open and close the opening hole 33.
  • the damper 35 may control the air flow between the food defrosting device 30 and the food defrosting chamber 20.
  • the thermoelectric module 40 may be mounted at a rear of the food defrosting chamber 20.
  • the front side of the thermoelectric plate 41 may face a back side of the food defrosting device 30.
  • the heat sink plate 42 and the fan 43 may slide into and join with the food defrosting device 30.
  • the food defrosting device 30 may further include a guide hole 34 (see Fig. 2) sized to allow the heat sink plate 42, together with the fan 43 mounted thereon, to pass through and into the food defrosting device 30.
  • the heat sink plate 42 and the fan 43 may pass through the guide hole 34, leaving the front side of the thermoelectric plate 41 to face the back side of the food defrosting device 30.
  • the food defrosting device 30 may be assembled with the thermoelectric module 40.
  • the food defrosting chamber 20 and the food defrosting device 30 may not be connected, except via the opening hole 33 controlled by the damper 35; therefore, heat generated in the food defrosting device 30 may not be transferred to the food defrosting chamber 20 during the defrosting process.
  • the heat sink plate 42 and the fan 43 may be positioned inside the food defrosting device 30 through the guide hole 34.
  • the front side of the thermoelectric plate 41 may be positioned to face the back side of the food defrosting device 30 and configured to close the guide hole 34.
  • the embodiments are depicted as having only one damper 35 provided in the food defrosting device 30.
  • embodiments are not limited as to the number of the dampers, and a plurality of dampers 35 may be provided. As the number of damper 35 is increased, the heat transfer rate may be increased between the food defrosting device 30 and the food defrosting chamber 20.
  • the refrigerator 1 may further include a damper motor (not shown) configured to open and close the damper 35 by rotation of the damper motor.
  • the refrigerator 1 may further include a controller 11, which may be positioned in the body 10, that controls the damper 35 and the thermoelectric module 40.
  • the controller 11 may be configured to control the refrigerator 1 to operate in several modes. If food defrosting is needed, the controller 11 may place the refrigerator in the defrosting mode, such that the food defrosting device 30 is operated. If food defrosting is not need, the controller 11 may control the operation of refrigerator 1 to be in the general cooling mode. If rapid cooling is needed, the controller 11 may control the refrigerator to be in the rapid cooling mode, such that food stored in the food defrosting device 30 may be cooled more rapidly.
  • the heat generated by the thermoelectric module 40 may be supplied or circulated into the food defrosting device 30.
  • the heat supplied to the food defrosting device 30 must not leak into the food defrosting chamber 20. Therefore, in the defrosting mode, the controller 11 may be configured to turn on the thermoelectric plate 41 and the fan 43, and to close the damper 35.
  • the controller 11 may be configured to turn off the thermoelectric plate 41 and the fan 43, and to open the damper 35.
  • the refrigerated air from refrigerator 1 may enter the food defrosting device 30 more rapidly, and may be exchanged with the heat inside of the food defrosting device 30. That is, in the rapid cooling mode, the controller 11 may be configured to turn off the thermoelectric plate 41, and to turn on the fan 43 and to open the damper 35.
  • the refrigerator 1 may include the food defrosting chamber 20, which may be divided from the food storage chamber 15, and the food defrosting device 30, which may be configured to slide into or out of the food defrosting chamber 20. Therefore, it may be possible to reduce both the time required to defrost frozen food, as well as the time required to clean the kitchen.
  • FIG. 5 a method for controlling a defrosting assembly of a refrigerator, such as the refrigerator 1 of Figs. 1-4, according to an embodiment will be described herein below.
  • the controller 11 may control the thermoelectric plate 40 and the fan 43 to be on for a fixed or predetermined period of time. At that time, the controller 11 may control the damper 35 to close the opening hole 33 to prevent heat transfer between the food defrosting device 30 and the food defrosting chamber 20.
  • a user may select the general cooling mode.
  • the controller 11 may control the thermoelectric plate 40 and the fan 43 to be off.
  • the controller 11 may control the damper 35 to be open, such that the opening hole 33 transfers heat between the food defrosting device 30 and the food defrosting chamber 20.
  • the controller 11 may control the thermoelectric plate 40 to be off, the fan 43 to be on, and the damper 35 to be open. Because the fan 43 is turned on, heat transfer between the food defrosting device 30 and the food defrosting chamber 20 may be rapid.
  • the controller 11 may receive a mode selection by a user. If the user mode selection is determined to be the defrost mode, the controller 11 may operate the food defrosting assembly in the defrost mode, in step S502.
  • the controller 11 may start a timer to operate the thermoelectric plate 41 and the fan 43 for a fixed or predetermined period of time, in step S504.
  • the controller 11 may control the thermoelectric plate 41 to be on, in step S506, the controller 11 may control the fan 43 to be on, in step S508, and the controller 11 may control the damper 35 to be closed, in step S510.
  • the controller 11 may then determine whether the fixed or predetermined period of time has expired. Once the fixed or predetermined time has expired, the process may move to step S514, and the controller 11 may turn off the thermoelectric plate 41. Further, the controller 11 may turn off the fan 43, in step S516.
  • step S5108 the controller 11 may operate the food defrosting assembly in the general cooling mode.
  • the controller 11 may control the thermoelectric plate 41 and the fan 43, respectively, to be off.
  • the controller 11 may control the damper 35 to be open to allow chilled air from the food storage chamber 15 to enter the food defrosting device 30.
  • the food defrosting device 30 may be used for general food storage.
  • step S526 if the user mode selection is determined to be the rapid cooling mode, the controller 11 may operate the food defrosting assembly in the rapid cooling mode.
  • step 528 the controller 11 may control the thermoelectric plate 41 to be off.
  • steps 530 and 532 the controller 11 may control the fan 43 to be on and the damper 35 to be open, respectively.
  • the fan 43 may circulate chilled air faster through the open damper 35 from the food storage chamber 15 into the food defrosting device 30.
  • a refrigerator is disclosed herein, and more particularly, a refrigerator having a food defrosting chamber 20 divided from a food storage chamber, and further comprising a food defrosting device positioned in, and removable from, the food defrosting chamber 20 for performing the defrosting or cooling functions in a single space by supplying heat to an inside of the food defrosting device in a defrosting mode, and by supplying chilled air from an outside of the food defrosting device in a general cooling mode or a rapid cooling mode, using a thermoelectric module.
  • any reference in this specification to "one embodiment,” “an embodiment,” “example embodiment,” etc. means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention.
  • the appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Defrosting Systems (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Refrigerator Housings (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
PCT/KR2010/004625 2009-07-21 2010-07-15 Defrosting assembly, refrigerator having the same, and method for controlling the same WO2011010831A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020090066496A KR101685353B1 (ko) 2009-07-21 2009-07-21 냉장고
KR10-2009-0066496 2009-07-21

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WO2011010831A2 true WO2011010831A2 (en) 2011-01-27
WO2011010831A3 WO2011010831A3 (en) 2011-04-14

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US (1) US20110016887A1 (ko)
KR (1) KR101685353B1 (ko)
WO (1) WO2011010831A2 (ko)

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US20110016887A1 (en) 2011-01-27

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