# US 12,215,913 B2 · Refrigerator and method of manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,215,913 B2 - Document ID: US12215913B2 - Status: Granted - Kind: B2 - Application number: 18/224,911 - Filed: 2023-07-21 - Published: 2023-11-16 - Granted: 2025-02-04 - Earliest claimed: 2010-06-22 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Seonil Yu; Kyeongchul Cho; Insun Yeo; Hongsik Kwon - Web page: https://patentgrep.com/patent/US12215913B2 ## CPC - F25D 11/00: Self-contained movable devices, e.g. domestic refrigerators - F25D 23/028: {Details} - F25D 23/02: Doors; Covers (F25D23/08 takes precedence {locks or fastenings E05B65/0042}) - F25D 23/126: {Water cooler} - F25D 2323/023: Door in door constructions - F25D 2323/024: Door hinges - F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B) ## Abstract Provided is a refrigerator including a cabinet forming one of a refrigerator compartment and a freezer compartment, a main door opening and closing the refrigerator compartment or the freezer compartment and including a storage space opened forward, a sub door installed on the main door and opening and closing the storage space of the main door, and a dispenser disposed on the sub door and dispensing water. ## Claims ### Claim 1 A refrigerator comprising: a cabinet that forms a first storage space; a first door that is configured to open and close the first storage space and that is configured to have an opening; first hinges that are fixed to the cabinet and that are configured to support an upper end and a lower end of the main door to enable the main door to rotate with respect to the cabinet; a storage unit that is configured to form a second storage space in the first door; a second door that is configured to open or close the opening of the first door; and a second hinge that is configured to couple the second door to the first door such that the second door rotates with respect to the first door; a dispenser that is disposed in a front surface of the second door and that is configured to dispense water; and a water supply passage that passes through the second hinge and is connected to the dispenser. ### Claim 2 (depends on 1) The refrigerator according to claim 1, wherein a valve and a pump are configured to supply water to the dispenser and are disposed on the water supply passage. ### Claim 3 (depends on 1) The refrigerator according to claim 1, further comprising a water tank that stores water to supply to the dispenser and that is disposed in the second storage space. ### Claim 4 (depends on 1) The refrigerator according to claim 1, further comprising a water tank that stores water to supply to the dispenser and that is disposed in a rear surface of the first door. ### Claim 5 (depends on 1) The refrigerator according to claim 1, wherein the second hinge includes: a second upper hinge that is configured to couple the upper end of the second door to the first door; and a second lower hinge that is configured to couple a lower end of the second door to the first door, wherein the water supply passage passes through the second lower hinge. ### Claim 6 (depends on 5) The refrigerator according to claim 5, wherein the second lower hinge has a hollow tube shape, and wherein the water supply passage passes through the hollow. ### Claim 7 (depends on 1) The refrigerator according to claim 1, further comprising a water tank that stores water to supply to the dispenser and that is disposed in the first storage space, and wherein the water supply passage connects the water tank and the dispenser. ### Claim 8 (depends on 2) The refrigerator according to claim 2, wherein the water tank is detachably disposed in the first storage space. ### Claim 9 (depends on 2) The refrigerator according to claim 2, wherein the water supply passage sequentially passes through the first hinge and the second hinge. ### Claim 10 (depends on 2) The refrigerator according to claim 2, wherein the water supply passage is disposed in the cabinet, the first door, and the second door and is embedded in a thermal insulator. ### Claim 11 (depends on 2) The refrigerator according to claim 2, wherein the dispenser includes an electronic part and a wire to be connected to the dispenser through the first hinge and the second hinge. ### Claim 12 (depends on 11) The refrigerator according to claim 11, wherein the electronic part includes a lighting device and a switch. ### Claim 13 (depends on 1) The refrigerator according to claim 1, wherein the water supply passage is connected to a water supply passage at an outside the refrigerator. ### Claim 14 (depends on 13) The refrigerator according to claim 13, wherein a first portion of the water supply passage is exposed out of the refrigerator and is connected to a water supply source. ### Claim 15 (depends on 14) The refrigerator according to claim 14, wherein the water supply passage passes through the cabinet and includes a second portion that is disposed in the refrigerator. ### Claim 16 (depends on 15) The refrigerator according to claim 15, wherein the water supply passage is guided into the first door through the first hinge, is guided into the second door through the second hinge, and is connected to the dispenser.