US20220196320A1 - Refrigerator - Google Patents

Refrigerator Download PDF

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Publication number
US20220196320A1
US20220196320A1 US17/441,819 US202017441819A US2022196320A1 US 20220196320 A1 US20220196320 A1 US 20220196320A1 US 202017441819 A US202017441819 A US 202017441819A US 2022196320 A1 US2022196320 A1 US 2022196320A1
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US
United States
Prior art keywords
housing
door
basket
space
disposed
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US17/441,819
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English (en)
Inventor
Seongmin Song
Yunsu CHU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
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
Priority claimed from KR1020190105700A external-priority patent/KR20200112606A/ko
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Assigned to LG ELECTRONICS INC. reassignment LG ELECTRONICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHU, Yunsu, Song, Seongmin
Publication of US20220196320A1 publication Critical patent/US20220196320A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/021—Sliding doors
    • 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
    • F25D23/028—Details
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B2210/00—General construction of drawers, guides and guide devices
    • A47B2210/17—Drawers used in connection with household appliances
    • A47B2210/175—Refrigerators or freezers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B88/00—Drawers for tables, cabinets or like furniture; Guides for drawers
    • A47B88/70—Coupled drawers
    • A47B88/75—Coupled drawers the secondary drawer being in or above the primary drawer
    • 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
    • F25B21/04—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect reversible
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • 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
    • F25D11/04—Self-contained movable devices, e.g. domestic refrigerators specially adapted for storing deep-frozen articles
    • 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
    • F25D23/06—Walls
    • F25D23/065—Details
    • F25D23/067—Supporting elements

Definitions

  • the present disclosure relates to a refrigerator having a deep freezer portion, and the present disclosure relates to a refrigerator having structural improvement for stable coupling between a basket disposed inside deep freezer portion and a deep freezer portion door.
  • a refrigerator is a home appliance to store food at a low temperature and includes a refrigerating space to store food in a refrigerated state at about 3° C. and a freezer space to store food in a frozen state at about ⁇ 20° C.
  • the temperature condition of the storage space is adjusted to be in a cryogenic state in which a temperature is significantly lower than a current temperature of the freezer space. So, when a state of the food is changed to a frozen state, the food passes through a freezing point temperature range, thereby minimizing the cell destruction. Therefore, there is an advantage in that the quality of meat and the texture of food may be returned to a state closer to a state before freezing even after defrosting.
  • the cryogenic temperature may be understood as referring to a temperature in the range of ⁇ 40 to ⁇ 50° C.
  • thermoelectric module As there is a limitation to cooling using existing refrigerant, there has been an attempt to lower the temperature of the deep freezer portion to a cryogenic temperature using a thermoelectric module (TEM) to satisfy the demand for the deep freezer portion.
  • TEM thermoelectric module
  • a related art patent document discloses a refrigerator capable of maintaining a low storage temperature using the TEM.
  • the above patent document only discloses the concept of maintaining a temperature of a deep freezer portion at a cryogenic temperature using the TEM and a structure for inflow of cold air generated from a thermoelectric element module, but does not disclose a structure to grip a basket disposed inside the deep freezer portion.
  • doors may be selected to open and close the deep freezer portion.
  • the door uses a hinge-type door to rotate or a sliding-type door for drawing out.
  • the deep freezer portion door When the deep freezer portion is opened and closed by pulling out the sliding-type door based on the sliding, the deep freezer portion door may be slidably provided on housing of the deep freezer portion to open and close the deep freezer portion, and the housing has to include a rail to slidably move the deep freezer portion door.
  • the basket disposed inside the deep freezer portion may be drawn out together.
  • the basket is supported on the rail and is drawn out, or an additional injection molding component is connected to the door and the basket is supported on the injection molding component.
  • the rail may be a factor to reduce the storage space inside the deep freezer portion.
  • the injection molding component has to be additionally connected to the door. In this case, durability thereof may be degraded and a size of the basket may be restricted according to a shape or a size of the injection molding component, and the inner storage space of the deep freezer portion may be reduced similar to the case when the basket is supported on the rail.
  • one of various objects of the present disclosure is to provide a refrigerator in which a basket is not supported on an additional injection molding portion and may be drawn out together with withdrawal of a door when the door is opened and closed.
  • One of the various objects of the present disclosure is to provide a refrigerator in which a rail is disposed outside of a deep freezer portion to efficiently use an inner storage space of the deep freezer portion.
  • One of the various objects of the present disclosure is to provide a refrigerator including a basket that may be stably gripped by the door without depending on the rail of the deep freezer portion.
  • One of the various objects of the present disclosure is to provide a refrigerator including a basket stably coupled to the deep freezer portion door and easily detachably coupled to the deep freezer portion door.
  • an exemplary embodiment of the present disclosure describes a hook structure of a drawer for direct assembly between a door of a deep freezer portion and the drawer and a supporting structure to support the drawer on an inner surface of the door.
  • An exemplary embodiment of the present disclosure describes a structure of a basket that may be coupled to the inner surface of the door regardless of an additional injection molding component or a structure of a guide rail. That is, an exemplary embodiment describes a structure in which the injection molding component additionally assembled to the door of a freezer space with a cryogenic temperature is integrated with the drawer.
  • An exemplary embodiment of the present disclosure describes a structure in which the drawer may be supported without scratching an inside of a case by the drawer when the drawer is drawn out and inserted into the cryogenic freezer space.
  • a refrigerator includes a freezer space defining a storage space; and a deep freezer portion disposed in the freezer space and defining a deep-freeze space that is partitioned from the storage space thereof and to maintain a lower temperature than a temperature of the storage space;
  • the deep freezer portion includes: housing having an opening at a front surface thereof and defining the deep-freeze space; a door configured to open and close the front surface of the housing; and a basket accommodated in the housing and inserted into and drawn out from the housing as the front surface of the housing is opened and closed, the basket includes: a fixing member disposed at one side of the basket to couple the basket to an inner surface of the door; and a first support member that protrudes from the basket and contacting the inner surface of the door; and the fixing member and the first support member are each disposed on a surface facing the door.
  • the door defines a groove on the inner surface thereof, the fixing member may be inserted into the groove, and the fixing member and the first support member are disposed on a surface of the basket and are spaced apart from each other by a predetermined distance.
  • the basket may further include a second support member that protrudes from one side of the basket and contacts an inner bottom surface of the housing and the basket includes a first surface facing the door; and a second surface opposite to the first surface; and a grill may be disposed on the second surface to introduce cold air.
  • the second support member may be disposed under the second surface and the first support member and the second support member may be disposed in the basket at a same height.
  • a refrigerator includes a freezer space defining a storage space; and a deep freezer portion disposed in the freezer space and defining a deep-freeze space that is partitioned from the storage space thereof and to maintain a lower temperature than a temperature of the storage space;
  • the deep freezer portion includes housing having an opening at a front surface thereof and defining the deep-freeze space; a door configured to open and close the front surface of the housing; a guide rail that extends from one side of the housing in a longitudinal direction of the housing; a guide member having one side connected to the door and movably provided along the guide rail, and a basket accommodated in the housing and inserted into and drawn out from the housing as the front surface of the housing is opened and closed, and the basket is coupled to the inner surface of the door at a height spaced apart from the guide member by a predetermined distance.
  • the basket may include a fixing member disposed at one side of the basket to couple the basket to an inner surface of the door; and a first support member that protrudes from the basket and contacting the inner surface of the door; and the door defines a groove on the inner surface thereof and the fixing member may be inserted into the groove.
  • the fixing member is inserted into the groove defined on the inner surface of the door to detachably couple the basket to the door.
  • the fixing member and the first support member are disposed on a surface of the basket and are spaced apart from each other by a predetermined distance.
  • the fixing member and the first support member protrude from one surface of the basket, the fixing member may be disposed on the one surface of the basket, and the first support member may be disposed under the one surface of the basket.
  • the basket may further include a second support member that protrudes from one side of the basket and contacts an inner bottom surface of the housing.
  • the basket includes a first surface facing the door; and a second surface opposite to the first surface; and a grill may be disposed on the second surface to introduce cold air.
  • the second support member is disposed under the second surface and the first support member and the second support member may be disposed in the basket at a same height.
  • a contact member may be disposed in the second support member and may directly contact the inner bottom surface of the housing.
  • the guide member may be connected to a lower side of the door.
  • the guide member may protrude from a rear end of the guide rail.
  • the guide rail may extend longer than a length of the deep-freeze space and the length of the deep-freeze space is a length from the front surface of the housing to a rear surface of the housing.
  • the guide rail may be recessed from an outer lower surface of the housing along the longitudinal direction of the housing.
  • a basket is not supported by an additional injection molding component and may be drawn out to outside together when a deep freezer portion door is opened and closed.
  • the basket may be coupled to the deep freezer portion door and may be firmly supported on the inner wall of the door.
  • the basket may be coupled to a deep freezer portion door of this embodiment to close an inner portion of the deep freezer portion.
  • the basket is prevented from contact to a bottom surface of housing, thereby preventing an external force from being transmitted to food stored in the basket.
  • FIG. 1 shows open doors of a refrigerator according to an embodiment of the present disclosure.
  • FIG. 2 shows a deep freezer portion in FIG. 1 .
  • FIG. 3 shows a thermoelectric element module according to an embodiment of the present disclosure.
  • FIG. 4 shows a refrigeration cycle used in a refrigerator according to an embodiment of the present disclosure.
  • FIG. 5 shows a deep freezer portion separated from a freezer space according to an embodiment of the present disclosure.
  • FIG. 6 is an enlarged view of a guide rail disposed on an inner wall of a freezer space.
  • (b) of FIG. 6 is a rear view of the deep freezer portion in FIG. 5 .
  • FIG. 7 show a deep freezer portion coupled to a freezer space.
  • FIGS. 8 and 9 are perspective views of the deep freezer portion in FIG. 5 .
  • FIGS. 10 and 11 show a deep freezer portion door and a basket.
  • FIG. 12 is a rear perspective view of a deep freezer portion.
  • FIG. 13 is a side cross-sectional view of the deep freezer portion in FIG. 12 .
  • FIG. 14 show a state in which a deep freezer portion door is inserted.
  • FIG. 15 shows a structure to limit a withdrawal distance of a deep freezer portion door and a structure to prevent removal thereof.
  • FIG. 16 is a cross-sectional view of a flow of cold air inside a deep freezer portion.
  • FIG. 17 is a side cross-sectional view of a deep freezer portion and (b) of FIG. 17 is an inner top view of a deep freezer portion.
  • FIG. 18 is a side cross-sectional view of a freezer space and (b) of FIG. 18 is a side cross-sectional view of a grill fan assembly.
  • FIG. 19 is a cross-sectional view of airflow inside a deep freezer portion.
  • FIG. 1 shows open doors of a refrigerator according to an embodiment of the present disclosure.
  • FIG. 2 shows a deep freezer portion in FIG. 1 .
  • FIG. 3 shows a thermoelectric element module according to an embodiment of the present disclosure.
  • FIG. 4 shows a refrigeration cycle used in a refrigerator according to an embodiment of the present disclosure.
  • a refrigerator 1 includes a refrigerator body 2 having a rectangular shape and a refrigerator door to open and close each space of the refrigerator 1 from the front of the body 2 .
  • the refrigerator 1 has a bottom freezer structure in which a refrigerating space 20 is defined at an upper portion thereof and a freezer space 10 is defined at a lower portion thereof.
  • the refrigerating space 20 and the freezer space 10 each have a side-by-side type door that is opened based on rotation about a hinge 8 disposed at both ends thereof.
  • the present disclosure is not limited to the refrigerator having the bottom-freezer structure. If the refrigerator has a deep freezer portion in the freezer space, a side-by-side type refrigerator in which the refrigerating space and a freezer space are arranged horizontally and a top mount-type refrigerator in which a freezer space is defined on the refrigerating space may be used as examples of the refrigerator.
  • the refrigerator body 2 includes an outer case 3 defining an outer appearance and an inner case 4 that is spaced apart from the outer case 3 by a predetermined space and defining an inner appearance of the refrigerating space 20 and the freezer space 10 .
  • the space between the outer case 3 and the inner case 4 is filled with insulating material by foaming to insulate the refrigerating space 20 and the freezer space 10 from an indoor space.
  • the refrigerating space 20 and the freezer space 10 accommodate a shelf 7 and a drawer 11 in storage spaces thereof to store food by increasing space utilization efficiency.
  • the shelf 7 and the drawer 11 may be disposed in the storage spaces thereof and may be guided along rails 14 disposed at both sides thereof.
  • the refrigerating space door 5 and the freezer space door 6 each include a door basket 9 to suitably store containers containing beverages.
  • a deep freezer portion 100 is disposed in the freezer space 10 .
  • the space of the freezer space 10 is divided into a left portion and a right portion for efficient use by a partition wall 12 that extends vertically and disposed at a center of the freezer space.
  • the partition wall 12 is inserted into the freezer space from a front of the cabinet and may be supported by an installation guide 13 disposed on a bottom of the refrigerator in the freezer space 10 .
  • the deep freezer portion 100 is disposed at an upper portion of the right side of the freezer space 10 .
  • the deep freezer portion 100 of the present disclosure is not necessarily limited to be disposed in the freezer space. That is, the deep freezer portion 100 according to an embodiment of the present disclosure may be disposed in the refrigerating space 20 .
  • the freezer space 100 may advantageously include the deep freezer portion 100 from the viewpoint of preventing leakage of cold air or heat insulation.
  • thermoelectric element module 200 is an assembly in which a cold sink 210 , a thermoelectric module 230 , a heat insulation material 220 , and a heat sink 240 are stacked and accommodated in module housing 250 to form a module.
  • the thermoelectric module 230 uses a Peltier effect.
  • the Peltier effect refers to a phenomenon in which, when a DC voltage is applied to both ends of two different materials, heat is absorbed at one side thereof and is emitted at the other side thereof according to a current direction.
  • the thermoelectric module includes n-type semiconductor material using an electron as a main carrier and p-type semiconductor material using a hole as a carrier that are alternately connected in series.
  • An electrode is disposed on a first surface thereof to flow current from the p-type semiconductor material to the n-type semiconductor material and an electrode is disposed on a second surface thereof to flow current from the n-type semiconductor material to the p-type semiconductor material according to one of current directions.
  • a first surface is a heat absorbing surface and the second surface is a heating surface
  • the first surface is a heating surface and the second surface is a heat absorbing surface.
  • thermoelectric element module 200 as the thermoelectric element module 200 is inserted into a front side of the grill fan assembly 15 from a rear side thereof, is coupled to the front side of the grill fan assembly 15 , and the deep freezer portion 100 is disposed in front of the thermoelectric element module 200 , heat absorption may occur at a front surface of the thermoelectric module 230 , that is, a surface facing the deep freezer portion 100 and heat generation may occur on a rear surface of the thermoelectric module, that is, a surface against the deep freezer portion 100 or an opposite surface to a surface directing toward the deep freezer portion 100 .
  • the deep freezer portion 100 may be frozen.
  • the thermoelectric module 230 has a flat plate shape with the front surface and the rear surface, and the front surface thereof is the heat absorbing surface 230 a and the rear surface thereof is the heating surface 230 b .
  • the DC power is supplied to the thermoelectric module 230 and causes the Peltier effect, thereby transferring a heat generated on the heat absorbing surface 230 a of the thermoelectric module 230 to the heating surface 230 b . Therefore, the front surface of the thermoelectric module 230 becomes a cold surface and the rear surface thereof becomes a heat generating portion. That is, it simplifies that the heat inside the deep freezer portion 100 is discharged to an outside of the deep freezer portion 100 . Power is supplied to the thermoelectric module 230 through a conducting wire of the thermoelectric module 230 .
  • the cold sink 210 is stacked in contact with the front surface of the thermoelectric module 230 , that is, the heat absorbing surface 230 a facing the deep freezer portion 230 .
  • the cold sink 210 may be made of metal such as aluminum having high thermal conductivity or an alloy and includes a plurality of heat exchange fins 211 on a front surface thereof.
  • the plurality of heat exchange fins 211 extend vertically and are spaced apart from one another in a horizontal direction.
  • the heat exchange fin 211 preferably extends vertically and has a continuous shape without interruption. This shape is configured such that water which has been melted at a time of defrosting the cold sink 210 easily flows down from the cold sink in the direction of gravity along the heat exchange fin 211 having the continuous shape and that extends vertically.
  • a distance between the heat exchange fins 211 is preferably a distance to prevent water formed between the two neighboring heat exchange fins 211 from flowing down by surface tension.
  • thermoelectric module In the cold sink 210 attached to the heat absorbing surface of the thermoelectric module, air inside the deep freezer portion 100 flows and exchanges heat. In this case, a phenomenon occurs in which food stored in the deep freezer portion 100 is cooled and moisture with air is frozen on the surface of the cold sink 210 , which is colder.
  • power is applied in the above-described current supply direction, that is, in a second direction opposite to the first direction.
  • the heat absorbing surface and the heating surface of the thermoelectric element module 200 are changed to each other in contrast to the power applied in the first direction.
  • the surface of the thermoelectric module contacting the heat sink is a heat absorbing surface and the surface contacting the cold sink 210 is a heating surface.
  • defrost may occur by applying the current in the second direction opposite to the first direction, which is the direction of the current applied for deep cooling.
  • the heat sink 240 is stacked in contact with the rear surface of the thermoelectric module 230 , that is, the heating surface 230 b provided in a direction opposite to an arrangement direction of the deep freezer portion 100 .
  • the heat sink 240 rapidly dissipates or discharges heat generated on the heating surface 230 b by the Peltier effect and may include an evaporator 37 of a refrigeration cycle cooling device 30 used to cool the refrigerator.
  • thermoelectric module 230 when low-temperature and low-pressure liquid refrigerant that has passed through an expansion device 35 in the refrigeration cycle absorbs the heat or evaporates while absorbing the heat in the heat sink 240 , the refrigerant in the refrigeration cycle absorbs or evaporates while absorbing the heat generated on the heating surface 230 b of the thermoelectric module 230 to immediately cool the heat generated on the heating surface 230 b.
  • the thermoelectric element module 200 of this embodiment includes the heat insulating material 220 that surrounds a circumference of the thermoelectric module 230 and to fill a gap between the cold sink 210 and the heat sink 240 . That is, an area of the cold sink 210 is larger than that of the thermoelectric module 230 and is substantially the same as the heat insulating material 220 . Similarly, an area of the heat sink 240 is larger than that of the thermoelectric module 230 and is substantially the same as the heat insulating material 220 .
  • the cold sink 210 and the heat sink 240 do not need to have the same size as each other and the size of the heat sink 240 may be larger to effectively dissipate the heat.
  • an inlet pipe 241 and an outlet pipe 243 pass through the heat sink 240 to flow the refrigerant of the refrigeration cycle cooling device 30 .
  • the refrigerant evaporates in the heat sink 240 and rapidly absorbs the heat from the heating surface of the thermoelectric module 230 as evaporation heat by defining a flow path of the refrigerant over an entire area of the heat sink 240 .
  • the module housing 250 includes a pipe through-hole 255 to pass the inlet pipe 241 and the outlet pipe 243 .
  • the heat sink 240 in this embodiment is designed to have a size sufficient to immediately absorb and discharge the heat generated by the thermoelectric module 230 and the cold sink 210 may have a smaller size than that of the heat sink 240 .
  • heat exchange efficiency of the cold sink 210 is improved by increasing the size of the cold sink 210 considering that the cold sink 210 exchanges heat between gas and solid while the heat sink 240 exchanges heat between liquid and solid.
  • a degree of increasing the size of the cold sink is exemplified as follows.
  • the cold sink is designed to have a size corresponding to that of the heat sink in consideration of a compact size of the thermoelectric module.
  • the size of the cold sink may be larger than that of the heat sink to improve the heat exchange efficiency of the cold sink.
  • the module housing 250 includes an accommodator 251 and a fixer 257 .
  • the accommodator 251 accommodates the cold sink 210 , the thermoelectric module 230 , the heat insulating material 220 , and the heat sink 240 in the stacked state.
  • the fixer 257 is disposed on an opposite surface to a surface of the module housing 250 having the accommodator 251 and couples the module housing 250 to the inner case 4 .
  • the accommodator 251 defines a fastening boss 253
  • the cold sink 210 , the heat insulating material 220 , and the heat sink 240 each include a through-hole at a position corresponding to that of the fastening boss 253 .
  • the fastening member 213 When the fastening member 213 is coupled to the fastening boss 253 through the through-holes thereof, the cold sink 210 , the thermoelectric module 230 , the heat insulating material 220 , and the heat sink 240 in the stacked state may be coupled to the accommodator 251 .
  • the refrigeration cycle cooling device 30 of the refrigerator discharges heat from the inside of the freezer space to an outside of the refrigerator using refrigerant that circulates in a thermodynamic cycle including evaporation, compression, condensation, and expansion.
  • a compressor 31 and a condenser 33 of the cooling device 30 are disposed in a machine room defined at a lower portion of a rear side of the freezer space 100 and isolated from the freezer space 100 .
  • a grill fan assembly 15 including a grill fan defining the rear wall of the freezer space and a shroud coupled to a rear side of the grill fan to distribute cold air in the freezer space is disposed between the freezer space and the rear wall of the inner case 4 .
  • the evaporator 37 of the refrigeration cycle cooling device 30 is disposed in a predetermined space between the grill fan assembly 15 and the rear wall of the inner case 4 .
  • the evaporating refrigerant exchanges heat with the air flowing in the inner space of the freezer space 10 , and the air cooled by the heat exchange is distributed in a cold air distribution space defined by the grill fan and the shroud and flows in the freezer space 10 , thereby cooling the freezer space 10 .
  • the refrigeration cycle cooling device of the present disclosure includes an evaporator 37 to evaporate by heat exchanging liquid refrigerant in a low-pressure atmosphere with air in the cooling space (the space between the grill fan assembly and the inner housing), a compressor 31 to pressurize gaseous refrigerant vaporized by the evaporator and discharge high-temperature and high-pressure gaseous refrigerant, a condenser 33 to heat-exchange the high-temperature and high-pressure gaseous refrigerant discharged from the compressor with air outside of the refrigerator (the machine room) and condense to discharge heat, an expansion device 35 such as a capillary tube to reduce a pressure of the refrigerant condensed by the condenser 33 in the low-temperature atmosphere.
  • the low-temperature and low-pressure liquid refrigerant with the pressure being lowered by the expansion device 35 is introduced into the evaporator again.
  • the low-temperature and low-pressure liquid refrigerant with the pressure and the temperature being lowered through the expansion device 35 is introduced into the heat sink 240 of the thermoelectric element module 200 before the low-temperature and low-pressure liquid refrigerant is introduced into the evaporator 37 .
  • the compressor 31 pressurizes the high-temperature and low-pressure gaseous refrigerant to discharge the high-temperature and high-pressure gaseous refrigerant.
  • the refrigerant generates heat in the condenser 33 and is condensed, that is, liquefied.
  • the compressor 31 and the condenser 33 are each disposed in the machine room of the refrigerator.
  • Low-temperature and high-pressure liquid refrigerant liquefied by the condenser 33 passes through a device such as the expansion valve, for example, the capillary tube and flows into the evaporator 37 with the pressure being lowered.
  • the refrigerant is evaporated while absorbing surrounding heat.
  • the refrigerant is branched into a refrigerating space evaporator 37 b or a freezer space evaporator 37 a .
  • the heat sink 240 of the thermoelectric element module 200 is disposed in front of the freezer space evaporator 37 a and is disposed behind the expansion device 35 in the flow path of the refrigerant.
  • the deep freezer portion 100 has to maintain a maximum temperature of minus 50 degrees Celsius.
  • the heating surface 230 b of the thermoelectric module 230 maintains a cold state
  • the heat absorbing surface 230 a easily maintains a colder state. Accordingly, a coldest state thereof may be maintained by disposing the heat sink 240 through which the refrigerant passes in front of the freezer space evaporator 37 a in the flow path of refrigerant.
  • the heat sink 240 directly contacts the thermoelectric module 230 and absorbs heat from the thermoelectric module 230 in a conductive manner using a thermal conductor such as metal, the heating surface 230 b of the thermoelectric module 230 may definitely be cooled.
  • the deep freezer portion 100 may be used as a general freezer portion by not supplying a power to the thermoelectric module 230 . If the power is not supplied to the thermoelectric module 230 as described above, heat absorption and heat generation do not occur in the heat sink 240 stacked on the thermoelectric module 230 . Accordingly, the refrigerant passing through the heat sink 240 does not absorb heat and flows into the freezer space evaporator 37 a in a state of liquid that is not evaporated.
  • complete opening of the freezer space door 6 refers that the door basket 9 of the freezer space door 6 is disposed outside of a front side of the freezer space 10 as shown in FIG. 1 and incomplete opening thereof refers that a portion of the door basket 9 is disposed at the front side of the freezer space 10 .
  • the front of the deep freezer portion, the front of the housing, the front of the freezer space, or in the same context refer to a side facing the door of the refrigerator
  • the rear of the deep freezer portion, the rear of the housing, the rear of the freezer space, or in the same context refers to a side opposite to the front side, that is, a portion facing the refrigerator door.
  • a guide rail 16 described in FIGS. 5, 6 and 12 and a guide rail 173 described in FIGS. 15 and 16 are different components and are clearly differently described through the specification as different components using the different reference numerals.
  • FIG. 5 shows a deep freezer portion separated from a freezer space according to an embodiment of the present disclosure.
  • (a) of FIG. 6 is an enlarged view of a guide rail disposed on the inner wall of a freezer space.
  • (b) of FIG. 6 is a rear view of the deep freezer portion in FIG. 5 .
  • (a) and (b) of FIG. 7 show a deep freezer portion coupled to a freezer space.
  • FIGS. 8 and 9 are perspective view of the deep freezer portion in FIG. 5 .
  • the refrigerator of this embodiment includes a refrigerating space 20 defining an opening at a front side thereof and a freezer space 10 partitioned from the refrigerating space 20 and defining an opening at a front side thereof, the freezer space 10 may include a deep freezer portion 100 forming a separated additional space and disposed inside of the freezer space 10 .
  • the deep freezer portion 100 may be detachably provided inside the freezer space 10 for maintenance.
  • an inner portion of the freezer space 10 may be divided by the partition wall fitted onto the installation guide 13 and the deep freezer portion 100 may be inserted into any one of the partitioned spaces.
  • the guide rail 16 is disposed on the inner side wall of the freezer space 10 and a guide member slidable along the guide rail 16 is disposed on the outer side wall of the housing 110 . The guide member is moved along the guide rail 16 to insert and draw out the deep freezer portion 100 into and from any one of the partitioned inner spaces of the freezer space 10 .
  • a freezing and evaporating space may be disposed at a rear side of the freezer space 10
  • the refrigeration cycle cooling device 30 may be disposed in the freezing and evaporating space
  • the freezing and evaporating space and the freezer space 10 may be partitioned by the grill fan assembly 15 and the inner case 4 .
  • the grill fan assembly 15 includes a grill fan defining a rear surface of the freezer space, a shroud and a fan 17 defining a flow path to supply cold air generated in the freezing and evaporating space to the freezer space 10 and may define the rear surface of the freezer space 10 .
  • the grill fan includes an upper flow path 18 a and a lower flow path 18 b on and under the fan 17 to provide a flow path through which air discharged from the fan 17 and introduced into the deep freezer portion 100 circulates inside the deep freezer portion 100 .
  • the flow path provided inside the deep freezer portion 100 is described below.
  • thermoelectric element module 200 is disposed between the shroud and the inner case 4
  • the fan 17 is disposed on the front surface of the thermoelectric element module 200
  • the deep freezer portion 100 is disposed on the front surface of the fan 17 .
  • the front surface refers to a surface facing the inside of the freezer space 10 from the inner case 4 of the freezer space 10
  • the rear surface refers to a surface facing the inner case 4 of the freezer space 10 from the inside of the freezer space 10 .
  • the fan 17 supplies, to the deep freezer portion 100 , cold air having ‘deep temperature’ by the thermoelectric element module 200 and may be provided separately from a fan to supply cold air to the freezer space 10 .
  • the housing 110 defines an opening 111 F opened and closed by the door 130 and an opening 111 R in which the thermoelectric element module 200 , the fan 17 , and the like may be disposed.
  • the opening 111 F is defined on the front surface of the housing 110 and is described below as an open portion on the front surface of the housing, and the opening 111 R is described below as an open portion on the rear surface of the housing.
  • a conducting wire (L) is drawn out through one side of the housing 110 to supply power to a heating wire 1117 disposed along a circumference of the opening 111 F that is open and defined on the front surface of the housing 110 .
  • the heating wire is provided to melt the frozen liquid.
  • the deep freezer portion 100 may be more tightly closed by supplying an induced current to a portion of the deep freezer portion door 130 using the conducting wire (L). That is, the conducting wire (L) may supply power to a load that may be provided in the deep freezer portion 100 .
  • the conducting wire (L) is disposed along the guide rail 16 and may be guided together when the deep freezer portion 100 is inserted and is drawn out along the guide rail 16 . If the conducting wire (L) is caught in a gap between the housing 110 and the side surface of the freezer space 10 , the deep freezer portion 100 may be not easily inserted and drawn out, and furthermore, coating of the conducting wire (L) is peeled off, which causes malfunction and exposure to a risk of accident. Therefore, the conducting wire (L) may be guided in a groove of the guide rail 16 .
  • a guide member protrudes from the lower portion of the housing 110 , includes a hole 1101 at one side thereof, and the conducting wire (L) may be drawn out to the outside of the housing 110 through the hole 1101 .
  • a cover 1102 may be disposed above the hole 1101 to cover at least a portion of the hole 1101 and may be spaced apart from the hole 1101 by a predetermined distance.
  • the freezer space 10 defines a space with an open front side, includes the guide rail 16 that extends from a front side thereof to a rear side thereof, and the guide rail 16 may include a fixing member 161 inserted into a fitting groove 115 of the housing 110 on a rear surface of the freezer space 10 .
  • the deep freezer portion 100 may be disposed inside the freezer space 10 by sliding along the guide rail 16 .
  • the fan 17 and the thermoelectric element module 200 are each disposed behind the deep freezer portion 100 .
  • the user may check that the deep freezer portion 100 is disposed in the freezer space 10 at a right position by physical coupling between the fitting groove 115 and the fixing member 161 .
  • the fitting groove 115 may be defined closer to the rear surface of the housing 110 and the fixing member 161 may be disposed closer to the rear surface of the freezer space 10 on the guide rail 16 to intuitively notify, to the user, that there is no gap between the rear surface of the deep freezer portion 100 and the thermoelectric element module 200 .
  • the fitting groove 115 and the fixing member 161 are not limited by the positional limitations.
  • the fitting groove 115 may be defined at a portion of the outer surface of the housing 110 and the fixing member 161 may be provided outside of a movement path of the deep freezer portion 100 on the guide rail 16 .
  • the fixing member 161 may be coupled to the fitting groove 115 when the rear surface of the deep freezer portion 100 contacts the rear surface of the freezer space 10 .
  • the rear surface of the deep freezer portion 100 may refer to a surface defining the opening 111 R of the housing 110 and the rear surface of the freezer space 10 may refer to a surface of the grill fan assembly 15 .
  • the front surface and the rear surface refer to the front surface opened and closed by the door in front of the freezer space with respect to the storage space of the freezer space and the rear surface facing the front surface and the standards are not interpreted differently depending on components.
  • the fixing member 161 is elastically supported on the guide rail 16 , and when the fixing member 161 is coupled to the fitting groove 115 , the fixing member 161 may be elastically deformed and then restored.
  • the elastic deformation and restoration refers that the degree of protrusion of the fixing member 161 from the upper side of the guide rail 16 is elastically deformed, and the degree of protrusion may be restored by an elastic force when the fixing member 161 is coupled to the fitting groove 115 .
  • the fixing member 161 has a semicircular shape with a curvature and may protrude from the upper surface of the guide rail 16 at the position close to the rear surface of the freezer space 10 .
  • a first side of the guide rail 16 may be disposed at the front surface of the freezer space 10
  • a second side of the guide rail 16 may be disposed at the rear surface of the freezer space 10
  • the guide rail 16 may extend from the front surface of the freezer space 10 to the rear surface of the freezer space 10
  • the fixing member 161 may protrude from the upper surface of the second side of the guide rail 16 .
  • the fixing member 161 is disposed at the first side (a portion facing the front surface of the freezer space) of the guide rail 161 , interference due to friction may occur when the deep freezer portion 100 is inserted into and is drawn out from the freezer space 10 .
  • the rear surface of the deep freezer portion 100 contacts the grill fan assembly 15 to prevent the cold air generated from the thermoelectric element module 200 from leaking into the freezer space 10 . Therefore, the fixing member 161 is preferably disposed close to the rear surface of the freezer space 10 .
  • the fitting groove 1115 may have a shape corresponding to an outer shape of the fixing member 161 such that the fixing member 161 is in surface contact with the fitting groove 115 .
  • the fixing member 161 of this embodiment has the semicircular shape with the curvature, and accordingly, the fitting groove 115 may have a semicircular shape corresponding to the curvature.
  • the housing 110 may be prevented from being drawn out from the freezer space 10 by the coupling between the fixing member 161 and the fitting groove 115 .
  • the user draws out the housing 110 , the user has to pull the housing 110 by elastically deforming the protruding portion of the fixing member 161 .
  • the deep freezer portion 100 may be fixed inside the freezer space 10 .
  • the deep freezer portion 100 may include housing 110 defining an opening 111 F at a front surface thereof and providing a deep-freeze space 100 S and a deep freezer portion door 130 slidable with respect to the housing 110 and to open and close the opening 111 F defined on the front surface of the deep freezer portion.
  • a guide member 170 is disposed at a lower portion of the deep freezer portion door 130 and is movable along a guide rail 173 of the housing 110 to slide the deep freezer portion door 130 to the inner space of the housing 110 .
  • the configurations of the guide rail 173 and the guide member 170 are described below with reference to FIGS. 14 to 17 .
  • the open front portion of the freezer space 6 may be opened and closed. Based on the opening of the front surface of the freezer space by the rotation of the door 6 , the deep freezer portion 100 is opened.
  • the door 130 slides to the housing 110 to open and close the opening 111 F of the housing. Based on the opening and closing thereof, the basket 150 may be inserted into and drawn out from the housing 110 to store or draw out food in or from the deep freezer potion 100 .
  • protrusion members 113 protrude from a front side of the opening 111 F and are disposed at both sides of the deep freezer portion door 130 to prevent shaking of the deep freezer portion door 130 when the deep freezer portion door 130 closes the opening in contact with the opening 111 F.
  • the deep freezer portion door 130 has a width that is smaller than that of the housing 110 and may be less interfered with the door basket 9 disposed inside the freezer space door 6 by a difference between the width of the deep freezer portion door 130 and the width of the housing 110 when the deep freezer portion door 130 is drawn out.
  • a fastener may be disposed on at least one of the deep freezer portion door 130 or the front surface of the housing of this embodiment and may include a first fastener 1115 and a hook 1313 disposed on the front surface of the housing and the door 130 , facing each other, and to provide a magnetic force, and a second fastener including a coupling groove 1113 into which the hook 1313 is inserted.
  • the first fastener 1115 may include a magnet having magnetism and the deep freezer portion door 130 may open and close the front open space 111 F of the housing by the magnetic force. Further, the deep freezer portion door 130 may include the hook 1313 that protrudes toward the opening 111 F defined on the front surface thereof and the hook 1313 may be inserted into the coupling groove 1113 defined at a portion of the opening 111 F defined on the front surface thereof to couple the deep freezer portion door 130 to the front surface of the housing.
  • the deep freezer portion door 130 may open and close the opening 111 F in contact with the opening 111 F. That is, the door 130 is coupled to the housing 110 by the first fastener and the second fastener using a multiple fastening structure, thereby effectively preventing the cold air from leaking from the inside of the deep freezer portion.
  • the first fastener 1115 may be made of material having magnetism by itself, or material having the magnetism when a current flows, and may receive a current by a conducting wire (L) drawn out to the outside of the deep freezer portion 100 .
  • the user may adjust the magnetism based on an amount of current supply to adjust a degree of closing thereof by contacting the deep freezer portion door 130 with the opening 111 F.
  • first fastener 1115 may be disposed on the deep freezer portion door 130 or the opening 111 F as described above or the first fasteners 1115 may be disposed on the deep freezer portion door 130 and the opening 111 F at positions corresponding to each other and may be coupled by an attraction force. If the first fastener 1115 is disposed only in either one of the deep freezer portion door 130 or the opening 111 F, the part where the first fastener 1115 is not disposed has to be made of material such as iron to attach to the magnet. In this case, the weight, the production cost, and the like of the deep freezer portion 100 may be increased.
  • the hook 1313 protrudes from the deep freezer portion door 130 toward the opening 111 F.
  • the hook 1313 is elastically supported by the deep freezer portion door 130 in the direction of gravity to elastically deform and restore the position of the hook 1313 when the hook 1313 is inserted into the coupling groove 1113 .
  • the elastic deformation and restoration refers that, when the hook 1313 is inserted into the coupling groove 1113 , the hook 1313 is moved while receiving an elastic force in an upward direction, and when the hook 1313 is coupled to the coupling groove 1113 , the position of the hook 1313 is restored.
  • the hook 1313 may be elastically deformed and then restored as described above, or may be coupled to or uncoupled from the coupling groove 1313 by a switch and a button disposed on one side of the deep freezer portion door 130 .
  • the door 130 may include a gasket 1311 along a circumference of an inner surface thereof to prevent leakage of the cold air in the deep freezer portion 100 to outside.
  • the hook 1313 , the coupling groove 1113 , and the magnet 1115 may be disposed in the area out of the circumference formed by the gasket 1311 . If the hook 1313 , the coupling groove 1113 , and the magnet 1115 are disposed in an area overlapping with the gasket 1311 , the effect of preventing the outflow of the cold air by the gasket 1311 may be significantly reduced. Therefore, as described above, the hook 1313 , the coupling groove 1113 , and the magnet 1115 are each preferably disposed in the area out of the circumference of the gasket 1311 .
  • a heating wire 1117 may be disposed along the circumference of the opening 111 F and may receive a power from the conducting wire (L) drawn out to an outside of the deep freezer portion 100 .
  • the housing 110 includes a hole 1101 at one side thereof and the conducting wire (L) may be drawn out to outside through the deep freezer portion 100 via the hole 1101 .
  • the deep freezer portion 100 includes the hole 1101 at the lower portion thereof as described above and protruding members disposed at both sides of the lower portion of the deep freezer portion 100 are provided in a path guided by a guide rail 16 of the freezer space. Therefore, the deep freezer portion 100 may not interfere with the protruding members when the deep freezer portion 100 is inserted into and is drawn out from the freezer space.
  • a cover member 1102 may be disposed at one side of the hole 1101 and covers an upper portion of the hole 1101 to prevent an accident such as peeling off of covering of the conducting wire (L) due to caught of the conducting wire (L) between the deep freezer portion 100 and the inner wall of the freezer space 10 .
  • FIGS. 10 and 11 show a deep freezer portion door and a basket.
  • the deep freezer portion 100 may include a basket 150 that may be inserted into and drawn out from the deep freezer portion 100 as the deep freezer portion door 130 is opened and closed, the deep freezer portion basket 150 includes a fixing member 153 that protrudes from one side of the deep freezer portion basket 150 , and the fixing member 153 may be inserted into a groove 1315 defined on an inner surface of the deep freezer portion door 130 to couple the deep freezer portion basket 150 to the deep freezer portion door 130 .
  • the fixing member 153 may be inserted into the groove 1315 defined on the inner surface of the deep freezer portion door 130 , and in the inserted state, may be separated from the groove 1315 . Accordingly, the deep freezer portion basket 150 is detachably coupled to the deep freezer portion door 130 .
  • the fixing member 153 has various shapes such that the fixing member 153 is inserted into the groove 1315 , and in this embodiment, the fixing member 153 has a hook shape.
  • the deep freezer portion basket 150 may be provided separately from the deep freezer portion door 130 , include a first surface 152 facing an inner surface of the deep freezer portion door 130 and a second surface 151 facing the first surface 152 and on which the grill is placed, and the fixing member 153 may be disposed on the first surface 152 .
  • a first support member 1521 protrudes from a lower side of the first surface 152 to contact the inner surface of the deep freezer portion door 130 and a second support member 1511 protrudes from a lower side of the second surface 151 to contact a bottom surface 112 of the housing 110 .
  • the fixing member 153 and the first support member 1521 eacy protrude from the first surface 152 of the basket 150 , the fixing member 153 may be disposed on the first surface 152 , and the first support member 1521 may be disposed under the first surface 152 .
  • the fixing member 153 and the first support member 1521 have a relative difference in height from the first surface 152 .
  • the first support member 1521 contacts the inner surface of the door 130 to support a rotational moment generated from the basket 150 with respect to the fixing member 153 , thereby stably gripping the basket 150 on the inner surface of the door 130 .
  • the basket 150 is detachably coupled to the door 130 and may be provided at a height spaced apart from the guide member 170 by a predetermined distance.
  • the basket 150 is directly coupled to the inner surface of the door 130 to connect the guide member 170 to the lower side of the door 130 . Therefore, the inner space of the housing 110 may be widely used.
  • the basket 150 If the basket 150 is not gripped by the door 130 , the basket 150 has to be drawn out based on the opening and closing of the door 130 , so the basket 150 has to be supported on the guide member 170 .
  • the guide member 170 is inevitably slidable in the inner space of the housing 110 , which is an element reducing the inner space of the housing 110 .
  • the guide member 170 is connected to the lower side of the door 130 and slides on the housing 110 at the outside of the inner space of the housing 110 , the basket 150 has to be gripped on other configurations than the guide member 170 and may be drawn out based on the opening and closing of the door 130 . Therefore, according to the configuration described in this embodiment, the basket 150 may be stably gripped on the inner surface of the door 130 at the height spaced apart from the guide member 170 by the predetermined distance.
  • the second surface 151 may be referred to as the surface on which the grill is disposed, and the grill 151 may define an inlet through which cold air generated from the thermoelectric element module 200 disposed at the rear of the deep freezer portion 100 is introduced.
  • the second support member 1511 protrudes from the lower surface of the grill 151 and contacts the bottom surface 112 of the housing 110 .
  • the housing 110 define openings 111 F and 111 R at the front surface and the rear surface thereof and has the bottom surface 112 , an upper surface 114 , and a side surface.
  • the bottom surface 112 forms an inner bottom surface of the housing 110 .
  • the upper surface 114 forms an inner upper surface of the housing 110 .
  • the rear surface forms an inner rear surface of the housing 110 and defines an open space accommodating the fan 17 to introduce cold air of the thermoelectric element module 200 into the housing 110 .
  • the side surface extends from a front side of the housing 110 to a rear side of the housing 110 in a depth direction.
  • the deep freezer portion basket 150 includes the fixing member 153 disposed on the first surface 152 and inserted into the groove 1315 of the deep freezer portion door and rotates clockwise about the contact portion between the groove 1315 and the fixing member 153 . Therefore, the first support member 1521 may be disposed under the first surface 152 , that is, at an opposite side to an upper side of the first surface 152 at which the fixing member 153 is disposed, protrudes toward the inner surface of the deep temperature portion door 130 , and contacts the inner surface of the deep freezer portion door 130 to fix a horizontal position of the deep freezer portion basket 150 and firmly couple to the deep freezer portion door 130 .
  • the grill 151 may include a second support member 1511 that protrudes from a lower surface of the grill 151 and contacting the bottom surface 112 of the housing to prevent the deep freezer portion basket 150 from contact with the bottom surface 112 of the housing 110 as the deep freezer portion basket 150 is tilted as described above.
  • a contact member 1513 is disposed in the second support member 1511 and protrudes from the support member 1511 in the direction of gravity to directly contact the bottom surface 112 of the housing.
  • the basket 150 may include the first support member 1521 and the second support member 1511 disposed at the same height.
  • the first support member 1521 may be disposed at the lower portion of the basket 150 to support the rotational moment generated as the fixing member 153 is disposed at the upper portion of the basket 150 and the second support member 1511 may be disposed at the lower portion of the basket 150 to prevent the basket 150 from being damaged due to the contact of the basket 150 with the bottom surface 112 of the housing 110 .
  • the contact member 1513 is additionally provided in the second support member 1511 that protrudes from the second surface 151 , and for the provision, the second support member 1511 may include a groove into which the contact member 1513 is inserted.
  • the contact member 1513 may be injection molded by a series of processes using the same material as the deep freezer portion basket 150 by directly contacting the contact member 1513 with the bottom surface 112 of the housing, thereby simplifying a process.
  • the contact member 1513 is made of additional material having high strength, hardness, and rigidity including POM material and may be fitted into the second support member 1511 .
  • FIG. 12 is a rear perspective view of a deep freezer portion.
  • FIG. 13 is a side cross-sectional view of FIG. 12 .
  • FIG. 14 is a state view in which a deep freezer portion door is inserted.
  • FIG. 15 shows a structure to limit a withdrawal distance of a deep freezer portion door and a structure to prevent removal thereof.
  • a deep freezer portion 100 of this embodiment includes housing 110 defining an opening at a front side thereof and providing a deep-freeze space 100 S having a predetermined length from the front side thereof to a rear side thereof, a guide rail 173 that extends from one side of the housing 110 in a longitudinal direction of the housing 110 , a guide member 170 movable along the guide rail 173 , and a door 130 connected to the guide member 170 to open and close the front side of the housing, and the guide rail 173 may extend longer than a length of the deep-freeze space 100 S.
  • the deep-freeze space 100 S is defined inside the housing 110 , is partitioned from the inner storage space of the freezer space, and maintains a temperature lower than that of the storage space.
  • a boundary of the deep-freeze space 100 S is defined by an inner front surface, an inner rear surface, and an inner side surface of the housing 110 .
  • a length of the deep-freeze space 100 S may refer to a length from the inner front surface of the housing 110 to the inner rear surface of the housing 110 .
  • the housing 110 may have a predetermined thickness for thermal insulation.
  • the guide rail 173 may extend longer than the length of the deep-freeze space 100 S and an extending length of the guide rail 173 may be close to a distance from an outer front surface of the housing to an outer rear surface of the housing.
  • the guide rail 173 of this embodiment may be recessed from the outer lower surface of the housing 110 along a longitudinal direction of the housing 110 (may extend from the outer front surface of the housing to the outer rear surface of the housing).
  • the outer front surface of the housing 110 may be described as an outer surface defining an opening 111 F of the housing and the outer rear surface of the housing 110 refers the outer surface of the housing 110 in contact with a grill fan assembly 15 .
  • the deep freezer portion door 130 is slidably provided on the guide rail 173 disposed under the housing 110 and is inserted and is drawn out based on sliding of the guide member 170 inserted into the guide rail 173 .
  • a general freezer space maintains a temperature of about 20 degrees Celsius, but the deep freezer portion 100 of this embodiment maintains a temperature of 40 degrees Celsius or less, which is ‘deep-temperature’.
  • the guide rail 173 is disposed outside of the space where the temperature of 40 degrees Celsius or less is maintained and enables sliding of the deep freezer portion door 130 .
  • the guide rail 173 of this embodiment is disposed at a lower side of the outer portion of the housing 110 and the guide member 170 is connected to a lower side of the deep freezer portion door 130 to slide the deep freezer portion door 130 .
  • the deep freezer portion basket 150 may not be supported by the guide member 170 . That is, as the inside of the deep freezer portion 100 is maintained at ‘the deep-temperature’, the deep freezer portion 100 has the thickness for internal insulation thereof.
  • the guide rail 173 is disposed at the lower side of the outer portion of the housing 110 and the inner bottom surface 112 of the housing 110 is spaced apart from the guide rail 173 by an outer thickness of the housing 110 . Therefore, the deep freezer portion basket 150 has to be fixed at a position spaced apart from the guide member 170 by a predetermined height.
  • the deep freezer portion basket 150 may not be supported by and coupled to the guide member 170 and has to be coupled to the deep freezer portion door 130 at the height spaced apart from the guide member 170 by the predetermined distance.
  • the deep freezer portion basket 150 includes a fixing member 153 and the deep freezer portion door 130 includes a groove 1315 on an inner surface thereof.
  • the first support member 1521 protrudes from the first surface 152 of the deep freezer portion basket to stably support the deep freezer portion basket 150 .
  • a second support member 1511 may protrude from under a grill 151 to prevent wear of the deep freezer portion basket 150 due to contact with the bottom surface 112 of the housing 110 and application of an external force to food stored in the deep freezer portion basket 150 by friction on the deep freezer portion basket 150 .
  • a first side of the guide member 170 is connected to the door 130 , and when the door 130 closes the front opening 111 F of the housing 110 , a second side of the guide member 170 may be disposed behind the deep-freeze space 100 S.
  • the guide rail 173 may communication a front side thereof with a rear side thereof, and when the door 130 closes the front surface of the housing 110 , the guide member 170 may protrude from a rear end of the guide rail 173 .
  • the rear surface of the housing 110 is disposed inside a freezer space in contact with a grill fan assembly 15 defining the rear surface of the storage space of the freezer space in the freezer space. If the second side of the guide member 170 protrudes from the rear side of the guide rail 173 , the door 130 may not completely close the front surface of the housing 110 due to the contact with the grill fan assembly 15 .
  • the grill fan assembly 15 may include a recess 15 a to accommodate the guide rail 173 .
  • a sliding movement distance of the guide member 170 is increased based on a recessed depth of the recess 15 a and the length of the guide rail 173 , thereby obtaining a longer withdrawal distance of the door 130 .
  • the guide rail 173 extends from the front side of the outer lower surface of the housing 110 to the rear side of the outer lower surface of the housing 110 to obtain the withdrawal distance of the guide member 170 , and the guide member 170 extends longer than the length of the deep freezer portion basket 150 in the longitudinal direction of the housing and may be inserted into the guide rail 173 .
  • a rail defines a plurality of steps such as two or three steps to obtain the withdrawal distance of the deep freezer portion basket 150 , the durability of the guide rail may be weakened.
  • a guide rail has to be disposed under the deep freezer portion to accommodate the rail having the plurality of steps and occupies larger volume than that of the guide rail 173 to accommodate the guide member 170 of this embodiment, thereby reducing space utilization of the deep-freeze space.
  • the guide rail 173 is disposed below the housing 110 to obtain the withdrawal distance of the one-step guide member 170 in this embodiment and extends from the outer front surface of the housing 110 to the outer rear surface of the housing 110 to obtain the withdrawal distance of the deep freezer portion door 130 .
  • the guide member 170 includes a roller 171 at one end thereof to slide the guide member 170 inside the guide rail 173 while minimizing friction.
  • the guide member 170 includes an engaging member 172 to limit a sliding distance of the deep freezer portion door 130 and the guide rail 173 includes a stopper 1731 disposed at one side thereof.
  • the sliding distance of the deep freezer portion door 130 may be limited by contacting the engaging member 172 with the stopper 1731 .
  • the engaging member 172 is disposed in front of the roller 171 in the guide member 170 , and the front refers to a portion toward the door 130 with respect to the housing 110 as described above. That is, a first end of the guide member 170 is connected to the door 130 and the roller 171 is disposed at a second end thereof. Therefore, the engaging member 172 may be disposed in front of the roller 171 in the guide member 170 .
  • the stopper 1731 is disposed close to the opening 111 F of the housing 110 in the guide rail 173 and the engaging member 172 may be disposed in front of the roller 171 provided at one side of the guide member 170 . That is, the guide rail 173 may include the stopper 1731 at the front side of the outer lower surface of the housing 110 and the engaging member 172 may be provided at a portion of the guide member 170 that extends further from the deep freezer portion basket 150 .
  • a sliding distance of the deep freezer portion door 130 may be limited by contacting the engaging member 172 with the stopper 1731 . If the sliding distance of the deep freezer portion door 130 is not limited, there is a risk in that the deep freezer portion door 130 is separated from and fall down from the housing 110 .
  • the guide rail 173 further includes a rib 1733 that protrudes from one side thereof to prevent separation of the deep freezer portion door 120 by contact with the guide member 170 when the deep freezer portion door 120 is rotated in the direction of gravity.
  • the rib 1733 may be disposed at an inner portion of the guide rail 173 than the stopper 1731 , and when the deep freezer portion door 120 rotates by receiving the moment, the rib 1733 may contact the upper surface of the guide member 170 .
  • the guide member 170 may include the roller 171 at the lower portion thereof and an upper portion of the guide member 170 may extend shorter than the lower portion of the guide member 170 .
  • the guide member 170 may have a rod shape, the upper portion thereof and the lower portion thereof are spaced apart from each other by a predetermined distance and extend.
  • the engaging member 172 is disposed at the upper side of the guide member 170 and contacts the stopper 1731 disposed between the upper side and the lower side of the guide member 170 to limit the withdrawal distance of the deep freezer portion door 30 .
  • the lower side of the guide member 170 extends further than the upper side of the guide member 170 in the length (depth) direction of the housing 110 from the deep freezer portion door 130 and the roller 171 may be disposed at the extending portion thereof.
  • the guide rail 173 may provide a slidable space of the guide member 170 under the housing 110 and support the guide member 170 , or is recessed from the outer surface of the housing 110 .
  • a rail cover 174 is connected to the guide rail 173 to support the guide member 170 and may move and support the guide member 170 simultaneously.
  • the rail cover 174 covers the open portion thereof to define a path with four surfaces, support the load of the guide member 170 , and moves the guide member 170 along the guide rail 173 .
  • a thickness of the housing 110 is increased, thereby reducing one of the storage space in the freezer space or the deep-freeze space of the deep freezer portion or not facilitating the injection molding during the manufacturing of the housing 110 .
  • the housing 110 may be made of insulating material to maintain the inside thereof at the cryogenic temperature, but it is not easy to manufacture the guide rail 173 having all surfaces made of the insulating material and defining a path with the four surfaces.
  • the housing 110 may be easily manufactured by disposing, under the housing 110 , the guide rail 173 defining the opening at one side thereof and having the recessed shape and covering, by the rail cover 174 , the open portion of the guide rail 173 .
  • the rail cover 174 includes a fixer 1741 .
  • the fixer 1741 may couple the rail cover 174 to the housing 110 and may include various shapes such that the rail cover 174 is coupled to the housing 110 .
  • the rail cover 174 is connected to the guide rail 173 to form the path through which the guide member 170 may move and in which a front side thereof communicates with a rear side thereof.
  • the second end of the guide member 170 may be disposed behind the rear end of the rail cover 174 . Therefore, the rail cover 174 does not need to have a length corresponding to that of the guide rail 173 and may have a length shorter than that of the guide rail 173 .
  • the deep freezer portion basket 150 may define a space to store food and include an additional shelf 155 to partition the storage space inside the deep freezer space basket 150 .
  • FIG. 16 is a cross-sectional view of a flow of cold air inside a deep freezer portion.
  • (a) of FIG. 17 is a side cross-sectional view of a deep freezer portion.
  • (b) of FIG. 17 is an inner top view of a deep freezer portion.
  • (a) of FIG. 18 is a side cross-sectional view of a freezer space.
  • (b) of FIG. 18 is a side cross-sectional view of a grill fan assembly.
  • FIG. 19 is a cross-sectional view of air flow inside a deep freezer portion.
  • a thermoelectric element module 200 of this embodiment includes a thermoelectric module 230 having a heat absorbing surface 230 a and a heating surface 230 b .
  • a fan 17 faces the heat absorbing surface 230 a of the thermoelectric module and introduces cold air into the deep freezer portion 110 .
  • An accommodator 19 accommodates the fan 17 , protrudes from an inner surface of the freezer space and includes a guide 18 disposed at one side of the accommodator 19 and to guide flow of the cold air.
  • the housing 110 provides a flow path 1141 defined at a portion of an inner surface of the housing and stepped from the inner surface of the housing.
  • the guide 18 may include an upper path 18 a defined at an upper portion of the accommodator 19 and a lower path 18 b defined at a lower portion of the accommodator 19 .
  • the housing 110 defines the openings 111 F and 111 R on the front surface and the rear surface, respectively, and an inner space of the housing 110 may include a bottom surface 112 facing a lower side of the deep freezer portion basket 150 and defining the bottom surface of the housing 110 , an upper surface 114 facing the bottom surface 112 , and side surfaces connecting the upper surface 114 , the bottom surface 112 , a front surface, and a rear surface to divide the inner space thereof to have a cube shape.
  • the upper surface 114 of the housing 110 may define a stepped flow path 1141 at a portion thereof.
  • the flow path 1141 may extend in direction of expanding the deep-freeze space 110 S in the housing 110 .
  • the flow path 1141 includes vertical portions 1141 a having a width of the flow path and spaced apart from each other, and that extends in a longitudinal direction of the deep freezer portion and a horizontal portion 1141 b connecting one sides of the vertical portions.
  • the flow path 1141 may be defined on the upper surface 114 and may have a U-shape.
  • the vertical portion 1141 a may extend in a direction of decreasing the width of the flow path 1141 along the longitudinal direction of the deep freezer portion.
  • the width between one sides of the vertical portions 1141 a corresponds to a length of the horizontal portion 114 b and a width (W) of second sides of the vertical portions 1141 a may be shorter than that of the horizontal portion 1141 b.
  • the second side of the vertical portion 1141 a may communicate with the guide 18 and the width (W) between the second sides of the vertical portions 1141 a may be the same as the guide 18 .
  • the flow path 1141 may be inclined downward from the upper surface 114 of the housing toward the rear surface of the housing.
  • the cold air introduced into the housing 110 through the flow path 1141 having the various shapes may be guided toward the guide 18 and may be discharged to the outside of the housing 110 .
  • the vertical portions 1141 a extend in parallel while maintaining the width of the horizontal portion 1141 b at one side thereof and then extend in a direction of decreasing the width of the vertical portions at a predetermined area of the second side of the vertical portion 1141 a .
  • a bending portion 1145 may decrease the width of the vertical portions.
  • the flow path 1141 may have inclination at the bending portion 1145 .
  • the step of the flow path 1141 defines a flow path through which cold air flows inside the housing.
  • the bending portion 1145 and an inclined portion 1143 may be disposed at the second side of the vertical portion 1141 a to obtain an area of the flow path and guide the cold air to the guide 18 .
  • the deep freezer portion basket 150 is spaced apart from the bottom surface 112 by a predetermined height and a second flow path 1121 may be defined in a space between the bottom surface 112 and the basket 150 .
  • the flow paths are respectively defined on the upper surface 114 and the bottom surface 112 of the housing 110 as described above, the flow path 1141 defined on the upper surface of the housing refers to a first flow path.
  • a height of the basket 150 is smaller than that of the housing 110 and the basket 150 may be coupled to the inner surface of the door 130 at a position spaced apart from each of the upper surface 114 and the bottom surface 112 of the housing.
  • the movement path of cold air by the above configuration is described.
  • the cold air is introduced into the housing by a thermoelectric module and a fan accommodated in the accommodator 19 and the introduced cold air passes through a grill disposed on the rear surface of the basket 150 . That is, the cold air moves from the rear surface of the housing 110 to the front surface of the housing and a flow of the cold air from the front surface of the housing 110 to the rear surface of the housing 110 is divided into an upper flow of the housing 110 and a lower flow of the housing 110 at the front surface thereof.
  • a flow (f 1 ) of cold air flowing into the housing through the thermoelectric element module and the fan directs the front surface of the housing from the rear surface of the housing, and the flow circulating to the rear surface of the housing from the front surface of the housing may be divided into a flow (f 2 ) guided along the first flow path 1141 of the housing and a flow (f 3 ) guided along the second flow path 1121 .
  • the first flow path 1141 communicates with the upper flow path 18 a , may provide a space sufficient to move the cold air by the horizontal portion 1141 b and the vertical portion 1141 a as described above and may easily introduce the cold air to the upper flow path 18 a by the bending portion 1145 and the inclined portion 1143 .
  • the upper flow path 18 a may include a guide inclined portion 181 a to guide flow of the cold air to minimize an element that may act as a resistance to the flow of the cold air moving along the bending portion 1145 and the inclined portion 1143 .
  • the guide inclined portion 181 a may be inclined downward from the lower portion of the upper flow path 18 a along the flow path through which the cold air moves and may prevent interruption of flow that may occur at the communication portion between the first flow path 1141 and the upper flow path 18 a.
  • the second flow path 1121 communicates with the lower flow path 18 b .
  • the second flow path 1121 and the lower flow path 18 b do not form a step.
  • the second flow path 1121 and the lower flow path 18 b may form a parallel surface and communicate with each other. That is, a height of the lower flow path 18 b may correspond to a height between the lower surface of the basket 150 and the bottom surface 112 .
  • the flow path and the guide communicate with each other when the housing 110 is coupled to the inner side of the freezer space, that is, when the accommodator 19 is inserted into and coupled to the opening 111 R defined on the rear surface of the housing 110 .
  • the inclined portion 1143 may be defined radially along the boundary surface of the bending portion 1145 . Even in this case, a width (W) determined by the bending portions 1145 has to correspond to the width of the upper flow path 18 a.
  • Refrigerator 2 Body 3: Outer case 4: Inner case 5: Refrigerating space 6: Freezer space door door 7: Shelf 8: Hinge 9: Door basket 10: Freezer space 11: Drawer 12: Partition wall 13: Installation guide 14: Rail 15: Grill fan assembly 16: Guide rail 17: Fan 18a: Upper flow path 18b: Lower flow path 19: Accommodator 20: Refrigerating space 30: Cooling device 31: Compressor 33: Condenser 35: Expansion device 37: Evaporator 100: Deep freezer 110: Housing portion 130: Deep freezer 150: Deep freezer portion door portion basket 170: Guide 200: Thermoelectric element module

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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)
US17/441,819 2019-03-22 2020-03-23 Refrigerator Abandoned US20220196320A1 (en)

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KR20190033076 2019-03-22
KR10-2019-0033076 2019-03-22
KR10-2019-0105700 2019-08-28
KR1020190105700A KR20200112606A (ko) 2019-03-22 2019-08-28 냉장고
PCT/KR2020/003931 WO2020197210A1 (fr) 2019-03-22 2020-03-23 Réfrigérateur

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EP3943846A1 (fr) 2022-01-26
EP3943846A4 (fr) 2022-11-23

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