EP1621836B1 - Refrigerator with bottom drawer having basket lift device - Google Patents

Refrigerator with bottom drawer having basket lift device Download PDF

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Publication number
EP1621836B1
EP1621836B1 EP05007839A EP05007839A EP1621836B1 EP 1621836 B1 EP1621836 B1 EP 1621836B1 EP 05007839 A EP05007839 A EP 05007839A EP 05007839 A EP05007839 A EP 05007839A EP 1621836 B1 EP1621836 B1 EP 1621836B1
Authority
EP
European Patent Office
Prior art keywords
lift
refrigerator
lift frame
locking
frame
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.)
Ceased
Application number
EP05007839A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1621836A3 (en
EP1621836A2 (en
Inventor
Seung-Hwan Oh
Kyung-Han Jeong
Sung-Hoon Chung
Myung-Ryul Lee
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
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP1621836A2 publication Critical patent/EP1621836A2/en
Publication of EP1621836A3 publication Critical patent/EP1621836A3/en
Application granted granted Critical
Publication of EP1621836B1 publication Critical patent/EP1621836B1/en
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • A47B51/00—Cabinets with means for moving compartments up and down
    • 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
    • A47B67/00—Chests; Dressing-tables; Medicine cabinets or the like; Cabinets characterised by the arrangement of drawers
    • A47B67/04—Chests of drawers; Cabinets characterised by the arrangement of 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
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • 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
    • 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
    • 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
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • F25D25/005—Charging, supporting, and discharging the articles to be cooled using containers
    • 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
    • F25D25/04—Charging, supporting, and discharging the articles to be cooled by conveyors

Definitions

  • the present invention relates to a refrigerator of the so-called 'drawer' type having a basket lift device and more particularly, to a basket lift device capable of lifting a basket received at a lower portion of a main body of such a refrigerator, to thereby enhance users' convenience.
  • Figure 1 is a perspective view of a refrigerator and Figure 2 is a sectional view of a lower portion of the refrigerator showing how a basket is received in a main body of the refrigerator in accordance with the conventional art.
  • a typical bottom drawer-type refrigerator includes a main body 102 having an opened front side and a receiving space, an upper cooling chamber 106 disposed at an upper portion of the main body 102, having a pair of upper ('French' style side-by-side) doors 104 respectively opening swingably at both sides, for keeping food items stored therein cold, and a lower cooling chamber 112 (e.g. a freezer compartment) disposed at a lower portion of the main body 102, separated by a barrier wall 108 from the upper cooling chamber 106 and having a drawer door 110 opening slidably outwardly.
  • a lower cooling chamber 112 e.g. a freezer compartment
  • a mechanical chamber 116 which includes a compressor 114 and other components for generating cooling air supplied to the upper cooling chamber 106 and the lower cooling chamber 112, is provided at a rear portion of the main body 102.
  • a basket 120 for receiving food items therein is slidably disposed in the lower cooling chamber 112, and the drawer door 110 is fixed at the front side of the basket 120 like a drawer front panel. Accordingly, when the drawer door 110 is pulled out, the basket 120 is thereby opened, and when the drawer door 110 is pushed in, the basket 120 is thereby closed.
  • a guide rail 124 is respectively installed between each of the outer sides of the basket 120 and inner sides of the lower cooling chamber 112 to guide the basket 120 to be slid the inward/outward directions.
  • One or more of drawers 126 for keeping food items therein may be provided above the basket 120 so as to be slidably opened.
  • the conventional bottom drawer-type refrigerator has a problem in that, because the installation position of the basket is too low, a user must lower his/her posture, that is, for example, the user must bend his/her back or crouch down in order to put in or take out the food items, causing users' inconvenience.
  • an object of the present invention is to provide a bottom drawer type refrigerator having a basket lift device capable of enhancing users' convenience by lifting a position of the basket in such a manner that when a basket disposed at a lower portion of a main body of the refrigerator is drawn out, it is lifted upwardly.
  • a bottom drawer type refrigerator including: a main body having upper and lower cooling chambers respectively disposed at upper and lower portions of the main body; a base frame disposed to be movable inwardly/outwardly at the lower cooling chamber and having a drawer door at a front side thereof; a lift frame disposed atop the base frame, on which a basket is placed; a gas spring mounted vertically at an upper surface of the base frame and connected with the lift frame to generate force for lifting the lift frame; and a pair of lift rails mounted at a rear side of the drawer door and guiding the lift frame to be moved up and down.
  • the gas spring includes a cylinder charged with high pressure gas, fixed at the base frame and disposed vertically; and an operation rod inserted into the cylinder and movable up and down linearly, the operation rod being urged upwardly by the pressure of the gas charged inside the cylinder, and fixed at the lift frame.
  • a locking unit is installed between the lift rail and a guide protrusion, and locks the lift frame to maintain a maximum lifted position and a maximum lowered position.
  • the locking unit includes an upper stopping groove formed at an upper side of the lift rail; a lower stopping groove formed at a lower side of the lift rail; a locking member inserted to be linearly moved into the guide protrusion and locked one of the upper stopping groove and the lower stopping groove; and a spring inserted into an insertion groove and gives an elastic force to allow the locking member to maintain the state of being caught by the stopping groove.
  • Figure 3 is a frontal perspective view of a bottom drawer refrigerator, with a basket thereof shown in an opened state in accordance with the first embodiment of the present invention
  • Figure 4 is a side elevation view showing a basket lift device of the refrigerator in accordance with the first embodiment of the present invention.
  • the refrigerator implementing the basket lift device of the present invention includes a main body 10 having a receiving space, an upper cooling chamber 14 disposed at an upper portion of the main body 10 and having a pair of upper (e.g. 'French') swinging doors 12 open at both sides, a lower cooling chamber 18 separated by a barrier wall 16 from the upper cooling chamber 14 and disposed at a lower portion of the main body 10, a basket 20 disposed to be slidable in inward/outward directions at the lower cooling chamber 18 for keeping food items therein, and a lift unit for lifting the basket 20 upwardly when the basket 20 is drawn out.
  • a main body 10 having a receiving space
  • an upper cooling chamber 14 disposed at an upper portion of the main body 10 and having a pair of upper (e.g. 'French') swinging doors 12 open at both sides
  • a lower cooling chamber 18 separated by a barrier wall 16 from the upper cooling chamber 14 and disposed at a lower portion of the main body 10
  • a basket 20 disposed to be
  • the upper cooling chamber 14 is preferably used as a refrigerating chamber for keeping refrigerated food items and the lower cooling chamber 18 is preferably used as a freezing chamber for keeping frozen food items.
  • a drawer door 22 is disposed at a front side of the lower cooling chamber 18 and pushes in or draws out the basket 20 while being moved in inwardly/outwardly of the main body 10.
  • a plurality of drawers 24 are optionally disposed at an upper portion of the lower cooling chamber 18, to keep food items, e.g. ice cubes, therein and can be drawn in or out.
  • the drawer door 22 includes a handle 26 at its front side and a base frame 30 mounted at its inner side, on which the basket 20 is mounted.
  • a pair of guide rails 32 are installed between the lower cooling chamber 18 and the base frame 30 to slidably guide the base frame 30 inwardly/outwardly of the main body 10.
  • Each guide rail 32 includes a fixed rail 32a fixed at the bottom surface of the lower cooling chamber 18, a middle rail 32b slidably connected with the fixed rail 32a, and a moving rail 32c slidably connected with the middle rail 32b and fixed at the lower surface of the base frame 30.
  • Figure 5 is a rear perspective view of the basket lift device of the refrigerator in accordance with the first embodiment of the present invention
  • Figure 6 is a top plan view of the basket lift device of the refrigerator in accordance with the first embodiment of the present invention.
  • the lift unit includes a lift frame 36 disposed above the base frame 30, on which the basket 20 is placed, a gas spring 38 installed at the base frame 30 and generating force for lifting the lift frame 36, and a pair of lift rails 40 for guiding the lift frame 36 to be moved linearly up and down.
  • the gas spring 38 includes a cylinder 42 charged with high pressure gas, fixed at the base frame 30 and disposed vertically; and an operation rod 44 inserted to be movable up and down in the cylinder 42 and linearly moved by the pressure of the gas charged in the cylinder 42, an upper end of the operation rod 44 being fixed at the lift frame 36.
  • a vertical riser portion 46 is formed extending at a right angle upwardly at the front side of the lift frame 36, and a connection portion 48 is formed at an upper end of the vertical riser portion 46.
  • An upper end of the operating rod 44 of the gas spring 38 is connected with the connection portion 48.
  • the gas spring 38 in which high pressure gas is charged in the hermetic cylinder 42, generates pressing force on the inner end of the operating rod 44 by the pressure of the gas.
  • the gas spring 38 is small, light and smoothly operated, so the lift frame 36 can be smoothly lifted.
  • the gas pressure of the gas spring 38 is so high as to lift the basket 20 to a maximum lifted position when a maximum load is kept in the basket 20.
  • the gas pressure of the gas spring can be variably implemented according to an application field.
  • the gas spring 38 can have such a pressure that can lift the basket 20 to a middle position.
  • the lift rails 40 are provided as pairs and are vertically mounted at a rear surface of the drawer door 22, each having a rail groove 50 formed in a longitudinal direction thereof.
  • a pair of guide protrusions 52 are formed at the vertical riser portion 46 of the lift frame 36, which protrusions 52 are inserted in and moved along the respective rail grooves 50.
  • Upper stoppers 54 and lower stoppers 56 for preventing release of the guide protrusion 52s are mounted at upper ends and lower ends of the lift rails 40.
  • a locking unit is installed between at least one of the lift rails 40 and the corresponding guide protrusion 52 in order to lock a position of the lift frame 36 where the lift frame 36 is lowered to the bottom position, or in order to lock the position of the lift frame 36 where the lift frame 36 is lowered to the bottom position and also lock a position of the lift frame 36 where the lift frame 36 is lifted to the maximum lifted position.
  • the locking unit includes upper stopping detents 60 formed at an upper portion of at least one of the lift rails 40, lower stopping detents 62 formed at a lower portion of the lift rail 40, a pair of locking pins 66 movable linearly in insertion recesses 64 formed at both sides of the guide protrusion 52 and catchable in corresponding ones of the upper stopping detents 60 and the lower stopping detents 62, and springs 68 respectively inserted in the insertion recesses 64 and providing elastic outward urging force so that the locking members 66 can be caught in the stopping detents 60 and 62.
  • the upper stopping detents 60 are formed in both sides of the rail groove 50 of the lift rail 40 corresponding to where the guide protrusions 52 are positioned when the lift frame is lifted to the maximum lifted position, and the lower stopping detents 60 are formed in both sides of the rail groove 50 of the lift rail 40 corresponding to where the guide protrusions 52 are positioned when the lift frame 36 is lowered down to the bottom position.
  • the locking unit When the locking pins 66 are caught in the lower stopping detents 62, the locking unit thereby prevents the lift frame 36 from being lifted by virtue of the pressure of the gas spring 38.
  • the locking pins 66 When a user pulls up the lift frame 36 with a certain force, the locking pins 66 are released by escaping from the lower stopping detents 62 and the lift frame 36 is able to be freely lifted by virtue of the gas spring 38.
  • the lift frame 36 is lifted to the maximum listed position, the locking pins 66 are caught in the upper stopping detents 60, preventing the lift frame 36 from being lowered.
  • the locking unit can be provided without the upper stopping detents 60 so that the locking member 66 is caught only in the lower stopping detents 62, preventing the lift frame 36 from being moved upwardly, and when the lift frame 36 is placed at the maximum lifted position, the guide protrusions 52 are caught by the stoppers 54, maintaining the lift frame at the maximum lifted position.
  • a pair of guide rails 70 are mounted extending in a vertical direction and guide the lift frame 36 to be moved up and down, and guide protrusions 72 are formed at both sides of the lift frame 70 and respectively inserted in the corresponding guide grooves 74 formed in the guide rails 70 and moved along the guide grooves 74.
  • Figure 10 shows an operation state of the basket lift device of the refrigerator in accordance with the first embodiment of the present invention.
  • the lift frame 36 is lifted by virtue of the pressure of the gas spring 38. Namely, the operation rod 44 is moved upward by the pressure of the high pressure gas charged in the cylinder 42 of the gas spring 38 and the lift frame 36 connected with the operation rod 44 is thereby lifted up.
  • the user can put in or take out a food item and then press the lift frame 36 downwardly. Then, the locking members 66 are released from the upper stopping recesses 60 to free the lift frame 36. When the lift frame 36 is moved down to the bottom, the locking members 66 are caught in the lower stopping detents 62, preventing the lift frame 36 from being lifted up.
  • Figure 11 is a top plan view of the basket lift device of the refrigerator in accordance with a second embodiment of the present invention
  • Figure 12 is an enlarged view of a portion 'C' in Figure 11 .
  • the basket lift device in accordance with the second embodiment has the same structure as the basket lift device of the first embodiment of the present invention, except for the locking unit for locking the lift frame 36.
  • the locking unit includes buttons 76 mounted at both upper and lower portions of the drawer door 22, an operation rod 78 connected with each button 76 and rotatably disposed inside the drawer door 22 so as to be rotated when the button 76 is pressed, a spring 82 mounted at one side of each operation rod 78 and providing an urging elastic force to the operation rod 78, and a locking detent 80 formed in the guide protrusion 52, in which an end of each the operation rod 78 can be caught.
  • the operation rod 78 mounted at a lower side of the drawer door 22 is inserted into the locking detent 80 in the guide protrusion 52, preventing the lift frame 36 from being lifted up.
  • Figure 13 is a top plan view of the basket lift device of the refrigerator in accordance with a third embodiment of the present invention
  • Figure 14 is an enlarged view of a portion 'D' in Figure 13.
  • a basket lift device in accordance with the third embodiment of the present invention has the same structure except for the locking unit for locking the lift frame.
  • the locking unit includes an actuator 86 mounted at a lower portion of the drawer door 22 or at both the upper and lower portions of the drawer door 22, an operation rod 88 connected with the actuator 86 and linearly moved according to driving of the actuator 86, and a locking detent 90 formed in the side of the guide protrusion 52 of the lift frame 36, in which the operation rod 52 can be insertedly caught.
  • the actuator 86 is preferably formed as a solenoid type for linearly and reciprocally moving the operation rod when power is applied thereto.
  • a through hole 92 is formed at one side of the lift rail 40 into which the guide protrusion 52 is inserted, allowing the operation rod 88 to pass therethrough.
  • the operation rod 88 when the user operates the actuator 86 by manipulating a switch or the like, the operation rod 88 is retracted and released from the locking detent 90, unlocking the lift frame 36. And when DC power of opposite polarity is applied to the actuator 86, the operation rod 88 is moved forward to be inserted into the locking detent 90, locking the lift frame 36.
  • the basket lift device disposed at the lower side of the refrigerator in the present invention has the following advantages.
  • the basket when the basket is drawn out, it can be lifted up to allow the user to take a food item out of the basket without having to bend his/her back, enhancing users' convenience.

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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)
  • Refrigerator Housings (AREA)
EP05007839A 2004-07-29 2005-04-09 Refrigerator with bottom drawer having basket lift device Ceased EP1621836B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020040059928A KR100619732B1 (ko) 2004-07-29 2004-07-29 바스켓 승강장치를 구비한 냉장고

Publications (3)

Publication Number Publication Date
EP1621836A2 EP1621836A2 (en) 2006-02-01
EP1621836A3 EP1621836A3 (en) 2007-03-28
EP1621836B1 true EP1621836B1 (en) 2009-10-21

Family

ID=34981859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05007839A Ceased EP1621836B1 (en) 2004-07-29 2005-04-09 Refrigerator with bottom drawer having basket lift device

Country Status (6)

Country Link
US (1) US20060022564A1 (zh)
EP (1) EP1621836B1 (zh)
KR (1) KR100619732B1 (zh)
CN (1) CN100360883C (zh)
AU (1) AU2005201411B2 (zh)
DE (1) DE602005017228D1 (zh)

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KR102492728B1 (ko) 2018-05-08 2023-01-27 엘지전자 주식회사 냉장고
KR102474912B1 (ko) * 2018-06-11 2022-12-06 엘지전자 주식회사 냉장고
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KR102586889B1 (ko) * 2018-08-30 2023-10-06 엘지전자 주식회사 냉장고
CN109431426B (zh) * 2018-12-12 2024-04-16 于维恕 一种拉升式碗篮
KR102583877B1 (ko) 2018-12-28 2023-10-04 엘지전자 주식회사 냉장고
KR102663561B1 (ko) * 2018-12-28 2024-05-08 엘지전자 주식회사 냉장고
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US20060022564A1 (en) 2006-02-02
CN1727824A (zh) 2006-02-01
CN100360883C (zh) 2008-01-09
AU2005201411B2 (en) 2006-02-16
EP1621836A3 (en) 2007-03-28
EP1621836A2 (en) 2006-02-01
KR100619732B1 (ko) 2006-09-08
DE602005017228D1 (de) 2009-12-03
AU2005201411A1 (en) 2006-02-16

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