Variable shelf assembly and refrigerator having the same

1. A variable shelf assembly comprising:

a mounting member detachably mounted in a storage compartment of a refrigerator;

a shelf support member including a lifting panel part coupled to the mounting member such that the shelf support member is vertically movable;

a shelf mounted on the shelf support member;

a lifting unit to lift the shelf support member; and

a panel defining a channel in the storage compartment to circulate cool air,

wherein the mounting member or the lifting panel part of the shelf support member has a plurality of cool air discharge holes through which cool air circulating in the channel is discharged, and

the lifting unit includes

a driving gear mounted to the shelf support member,

a driven gear rotated by the driving gear,

a screw shaft coupled to the driven gear and rotatable supported by the shelf support member,

at least one moving member coupled to the screw shaft and movable by the rotation of the screw shaft, and

at least one rotary link having a first end rotatably coupled to the moving member and a second end rotatably coupled to the mounting member.

2. The variable shelf assembly according to claim 1 , wherein:

the screw shaft includes a left-handed screw part and a right-handed screw part disposed at opposite sides of the driven gear,

the moving member includes first and second moving members mounted to the left-handed screw part and the right-handed screw part, respectively, and movable in opposite directions by the rotation of the screw shaft, and

the rotary link includes a first rotary link having a first end rotatably coupled to the first moving member and a second end rotatably coupled to a first position of the mounting member and a second rotary link having a first end rotatably coupled to the second moving member and a second end rotatably coupled to a second position of the mounting member.

3. The variable shelf assembly according to claim 1 , wherein the lifting unit further includes a rotary grip to rotate the driving gear and a connection rod to interconnect the rotary grip and the driving gear.

4. The variable shelf assembly according to claim 1 , further comprising a support frame having a plurality of grooves,

wherein the mounting member comprises a plurality of hooks, and

the hooks are received in respective ones of the grooves.

5. The variable shelf assembly according to claim 4 , wherein the grooves comprise:

a first plurality of grooves disposed vertically relative to each other in a first column, and

a second plurality of grooves disposed vertically relative to each other in a second column, wherein the discharge holes are between the first plurality of grooves and the second plurality of grooves.

6. A variable shelf assembly comprising:

a mounting member mounted to an object to be supported;

a shelf support member including a lifting panel part coupled to the mounting member such that the shelf support member is vertically movable;

a support frame to receive the shelf support member;

a shelf mounted on the shelf support member;

a lifting unit to lift the shelf support member; and

a panel defining a channel to circulate cool air,

wherein the lifting unit includes a driving gear mounted to the shelf support member, a driven gear rotatable by the driving gear, a screw shaft coupled to the driven gear and rotatably supported by the shelf support member, at least one moving member coupled to the screw shaft and movable by the rotation of the screw shaft, and at least one rotary link having a first end rotatably coupled to the moving member and a second end rotatably coupled to the mounting member, and

the mounting member or the lifting panel part of the shelf support member has a plurality of cool air discharge holes through which cool air circulating in the channel is discharged.

7. The variable shelf assembly according to claim 6 , wherein

the screw shaft includes a left-handed screw part and a right-handed screw part disposed at opposite sides of the driven gear,

the moving member includes first and second moving members mounted to the left-handed screw part and the right-handed screw part, respectively, and movable in opposite directions by the rotation of the screw shaft, and

the rotary link includes a first rotary link having a first end rotatably coupled to the first moving member and a second end rotatably coupled to a first position of the mounting member and a second rotary link having a first end rotatably coupled to the second moving member and a second end rotatably coupled to a second position of the mounting member.

8. The variable shelf assembly according to claim 6 , wherein the lifting unit further includes a rotary grip to rotate the driving gear and a connection rod to interconnect the rotary grip and the driving gear.

9. A refrigerator comprising:

a main body having a storage compartment defined therein;

and a plurality of shelves disposed in the storage compartment;

at least one shelf assembly mounted in the storage compartment,

wherein the shelf assembly includes:

a mounting member mounted in the storage compartment,

a shelf support member including a lifting panel part coupled to the mounting member such that the shelf support member is vertically movable,

one of the shelves being mounted on the shelf support member,

a support frame to receive the shelf support member,

a lifting unit to lift the shelf support member, the lifting unit comprising a rotary grip, and

a panel defining a channel in the storage compartment to circulate cool air,

wherein the mounting member and/or the lifting panel part of the shelf support member has a plurality of cool air discharge holes through which cool air circulating in the storage compartment is discharged,

wherein the rotary grip is installed at the shelf to drive the lifting unit such that the distance between the one of the shelves and the other shelves is adjusted, and

wherein the lifting unit includes

a driving gear mounted to the shelf support member,

a driven gear rotatable by the driving gear,

a screw shaft coupled to the driven gear and rotatably supported by the shelf support member,

at least one moving member coupled to the screw shaft and movable by the rotation of the screw shaft, and

at least one rotary link having a first end rotatably coupled to the moving member and a second end rotatably coupled to the mounting member.

10. The refrigerator according to claim 9 , wherein

the screw shaft includes a left-handed screw part and a right-handed screw part disposed at opposite sides of the driven gear,

the moving member includes first and second moving members mounted to the left-handed screw part and the right-handed screw part, respectively, and movable in opposite directions by the rotation of the screw shaft, and

the rotary link includes a first rotary link having one end rotatably coupled to the first moving member and the other end rotatably coupled to a first position of the mounting member and a second rotary link having a first end rotatably coupled to the second moving member and a second end rotatably coupled to a second position of the mounting member.

11. The refrigerator according to claim 9 , wherein the lifting unit further includes the rotary grip to rotate the driving gear and a connection rod to interconnect the rotary grip and the driving gear.

12. A refrigerator comprising:

a main body defining a storage compartment therein; and

a plurality of shelves disposed in the storage compartment

at least one shelf assembly mounted in the storage compartment,

wherein the shelf assembly includes:

a mounting member mounted in the storage compartment,

a shelf support member including a lifting panel part coupled to the mounting member such that the shelf support member is vertically movable,

one of the shelves being mounted on the shelf support member, and

a lifting unit to lift the shelf support member, the lifting unit disposed at the lifting panel part and comprising a rotary grip and

wherein the lifting unit includes:

a driving gear mounted to the shelf support member,

a driven gear rotatable by the driving gear,

a screw shaft coupled to the driven gear and rotatably supported by the shelf support member,

at least one moving member coupled to the screw shaft and movable by the rotation of the screw shaft, and

at least one rotary link having a first end rotatably coupled to the moving member and a second end rotatably coupled to the mounting member,

the rotary grip being installed at the one of the shelves to drive the lifting unit such that the distance between the shelf and other shelves is adjusted,

wherein the mounting member or the lifting panel part of the shelf support member has a plurality of cool air discharge holes through which cool air is discharged.

13. The refrigerator according to claim 12 , wherein

the screw shaft includes a left-handed screw part and a right-handed screw part disposed at opposite sides of the driven gear,

the moving member includes first and second moving members mounted to the left-handed screw part and the right-handed screw part, respectively, and movable in opposite directions by the rotation of the screw shaft, and

the rotary link includes a first rotary link having a first end rotatably coupled to the first moving member and a second end rotatably coupled to a first position of the mounting member and a second rotary link having a first end rotatably coupled to the second moving member and a second end rotatably coupled to a second position of the mounting member.

14. The refrigerator according to claim 12 , wherein the lifting unit further includes the rotary grip to rotate the driving gear and a connection rod to interconnect the rotary grip and the driving gear.