Refrigerator and manufacturing method thereof

1. A refrigerator comprising:

a main body comprising an inner case constituting a storage compartment and an outer case disposed outside the inner case;

a main insulation material disposed between the inner case and the outer case; and

an aerogel coating layer formed on,

at least a portion of a rear surface of the inner case or

at least a portion of a front surface of the outer case or

both the at least a portion of the rear surface and the at least a portion of the front surface,

by coating and curing a liquid-phase aerogel,

wherein the aerogel coating layer serves as an auxiliary insulation material of the main insulation material.

2. The refrigerator according to claim 1 , wherein the aerogel coating layer is formed by curing an aerogel coating solution selected from the group consisting of an organic binder coating solution, an inorganic binder coating solution, and a waterborne coating solution by room temperature curing or heating curing.

3. The refrigerator according to claim 1 , wherein the aerogel coating layer comprises at least one selected from the group consisting of a cryogenic aerogel and a pyrogenic aerogel,

wherein the aerogel coating layer is formed on

an entire rear surface of the inner case or

an entire front surface of the outer case or

both the entire rear surface and the entire front surface.

4. The refrigerator according to claim 1 , wherein the aerogel coating layer is formed on

the at least a portion of the rear surface of the inner case in contact with the main insulation material, or

the at least a portion of the front surface of the outer case in contact with the main insulation material or

both the at least a portion of the rear surface in contact with the main insulation material and the at least a portion of the front surface in contact with the main insulation material,

wherein the main insulation material comprises at least one selected from the group consisting of a filled and cured foam insulation material, a pre-processed foam insulation material, and a vacuum insulation panel (VIP).

5. The refrigerator according to claim 1 , further comprising a door comprising:

an inner panel;

an outer panel disposed outside the inner panel;

a main insulation material disposed between the inner panel and the outer panel; and

an aerogel coating layer formed

between the inner panel and the main insulation material or

between the outer panel and the main insulation material or

between the inner panel and the main insulation material and between the outer panel and the main insulation material.

6. The refrigerator according to claim 1 , wherein the door is an outer door and the refrigerator further comprising an inner door configured to open or close a front opening of the main body, disposed in between the outer door and the storage compartment, and the inner door having an independent storage space separated from the storage compartment,

wherein the outer door is configured to open or close the independent storage space and disposed outside the inner door, and

wherein the outer door comprises:

an inner panel;

an outer panel disposed outside the inner panel;

a main insulation material disposed between the inner panel and the outer panel; and

an aerogel coating layer formed

between the inner panel and the main insulation material or

between the outer panel and the main insulation material or

between the inner panel and the main insulation material and between the outer panel and the main insulation material.

7. The refrigerator according to claim 1 , further comprising a home bar door comprising an inner panel and an outer panel disposed outside the inner panel and configured to selectively open or close the main body,

wherein a main insulation material is disposed between the inner panel and the outer panel, and

the aerogel coating layer is formed

between the inner panel and the main insulation material or

between the outer panel and the main insulation material or

between the inner panel and the main insulation material and between the outer panel and the main insulation material.

8. The refrigerator according to claim 1 , further comprising a partition configured to partition the storage compartment into a plurality of sections,

wherein an aerogel coating layer is formed in the partition.

9. The refrigerator according to claim 1 , further comprising a machine room disposed at a rear surface of the main body, and

a machine room case defining an appearance of the machine room,

wherein an aerogel coating layer is formed around the machine room, and

wherein an aerogel coating layer is formed on one surface of the machine room case.

10. The refrigerator according to claim 1 , wherein an aerogel coating layer is formed at a cool air leak portion of the refrigerator,

wherein the cool air leak portion comprises at least one selected from the group consisting of a bent portion of the main body, an assembled structure of a rear panel of the main body, a bottom panel of the main body to which legs of the refrigerator are fixed, a flange of the main body, and a bent portion of a refrigerator door.

11. A refrigerator comprising an insulation structure formed by using a method comprising:

coating a liquid-phase aerogel on

an inner case constituting a storage compartment or

an outer case coupled to an outer surface of the inner case or

both the inner case and the outer case;

coupling the inner case to the outer case; and

filling a main insulation material between the inner case and the outer case.

12. The refrigerator according to claim 11 , wherein the coating method of the aerogel comprises at least one selected from the group consisting of spraying an aerogel coating solution by a nozzle spray method and coating an aerogel coating solution by a roller method.

13. The refrigerator according to claim 11 , wherein the method of forming the insulation structure further comprises curing the aerogel by room temperature curing or heating curing.

14. The refrigerator according to claim 11 , wherein the coupling of the inner case to the outer case comprises bending the outer case and coupling the bent outer case and the inner case.

15. A home appliance having an insulation structure, the insulation structure comprising:

a first panel;

a second panel facing the first panel;

a main insulation material disposed between the first panel and the second panel; and

an aerogel coating layer formed

between the first panel and the main insulation material or

between the second panel and the main insulation material or

between the first panel and the main insulation material and between the second panel and the main insulation material by coating and curing a liquid-phase aerogel.

16. The home appliance according to claim 15 , wherein the home appliance is a refrigerator or a cooking device.