Refrigerator

1. A refrigerator comprising:

an inner case, in which at least one storage compartment is formed, the inner case having at least a left side, a right side, an upper side, and a bottom side surrounding the at least one storage compartment;

an outer case coupled to an one outer surface of the inner case;

a foam insulation material blown into a space between the inner case and the outer case;

at least one storage container slidable into and out of the at least one storage compartment;

a side rail member coupled to a side surface of the at least one storage compartment, the side rail member being configured to moveably guide a movement of the at least one storage container;

at least one support member disposed in the at least one storage compartment, the at least one support member being coupled to the bottom side of the inner case; and

a central rail member formed to be entirely supported by the at least one support member by being coupled to a top surface of the at least one support member, where the central rail member is configured to guide the movement of the at least one storage container,

wherein the at least one support member is fixed by the foam insulation material.

2. The refrigerator according to claim 1 , wherein the at least one support member comprises a coupling protrusion passable through the bottom side of the inner case to contact the foam insulation material and to be supported by the foam insulation material.

3. The refrigerator according to claim 2 , wherein the bottom side of the inner case has a coupling hole through which the coupling protrusion passes.

4. The refrigerator according to claim 3 , wherein the at least one support member is temporarily assembled to the bottom side of the inner case as the coupling protrusion is inserted into the coupling hole and slides thereinto.

5. The refrigerator according to claim 1 , wherein the foam insulation material is blown into the space between the inner case and the outer case after the at least support member is temporarily assembled to the bottom side of the inner case.

6. The refrigerator according to claim 1 , wherein the central rail member is coupled to the at least one support member after blowing the foam insulation material into the space.

7. The refrigerator according to claim 1 , wherein the central rail member is coupled to the at least one support member as a portion of the central rail member is slidably inserted into the at least one support member.

8. The refrigerator according to claim 7 , wherein the central rail member has an insertion protrusion couplable to the at least one support member.

9. The refrigerator according to claim 8 , wherein the at least one support member comprises a hook portion including an insertion groove into which the insertion protrusion is inserted.

10. A refrigerator comprising:

an inner case, in which at least one storage compartment is formed, the inner case having a plurality of sides with at least some of the plurality of sides of the inner case facing at least some portions of the at least one storage compartment;

an outer case coupled to an least one outer surface of the inner case;

a foam insulation material blown into a space between the inner case and the outer case;

at least one storage container slidable into and out of the at least one storage compartment;

at least one rail unit configured to guide a movement of the at least one storage container; and

at least one support member disposed in the at least one storage compartment to support the at least one rail unit and coupled to a bottom side of the plurality of sides of the inner case,

wherein the at least one rail unit is coupled to the at least one support member as a portion of the at least one rail unit is slidably inserted into the support member,

wherein the at least one rail unit has an insertion protrusion couplable to the at least one support member,

wherein the at least one support member comprises a hook portion including an insertion groove into which the insertion protrusion is insertable, and

wherein the hook portion is elastically deformed as the insertion protrusion is inserted into the insertion groove and coupling of the at least one rail unit and the at least one support member is maintained by pressing the insertion protrusion with elasticity.