# US 12,595,957 B2 · Refrigerator

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- Number: US 12,595,957 B2
- Document ID: US12595957B2
- Status: Granted
- Kind: B2
- Application number: 18/392,154
- Filed: 2023-12-21
- Published: 2024-07-18
- Granted: 2026-04-07
- Earliest claimed: 2023-01-13
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Younghun Son
- Web page: https://patentgrep.com/patent/US12595957B2

## CPC

- F25D 23/063: {formed by an assembly of panels}
- F25D 27/00: Lighting arrangements (in general F21)
- F25D 23/02: Doors; Covers (F25D23/08 takes precedence {locks or fastenings E05B65/0042})
- F25D 2201/12: using an insulating packing material
- F25D 2323/02: Details of doors or covers not otherwise covered
- 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

A refrigerator includes a cabinet having a storage space, and a door configured to open and close the storage space. The door includes a panel assembly including a front panel that defines a front surface of the door and is made of a transparent material, and a rear panel disposed behind the front panel and made of a transparent material, a door liner that defines a rear surface of the door and a liner opening shielded by the rear panel, an insulating material filled into a space between a perimeter of the panel assembly and the door liner, a lighting device configured to illuminate a space behind the door, and a light case coupled to the door liner. The light case connects the rear panel to the door liner, blocks an inflow of the insulating material, and defines a recess space accommodating the lighting device.

## Claims

### Claim 1

A refrigerator comprising:
a cabinet having a storage space; and
a door configured to open and close the storage space,
wherein the door comprises:
a panel assembly comprising (i) a front panel that defines a front surface of the door and is made of a transparent material, and (ii) a rear panel disposed rearward relative to the front panel and made of a transparent material,
a door liner that defines a rear surface of the door, the door liner having a liner opening that is covered by the rear panel,
an insulating material provided in a space between a perimeter of the panel assembly and the door liner,
a lighting device configured to illuminate a space defined rearward relative to the door, the lighting device comprising (i) a substrate, (ii) a plurality of light emitting diodes (LEDs) disposed at the substrate, and (iii) a substrate connector disposed at the substrate,
a light case that is coupled to the door liner and defines a recess space accommodating the lighting device, the light case connecting the rear panel to the door liner and being configured to block the insulating material from entering the light case, and
a connector disposed inside the light case and configured to couple to the substrate connector,
wherein the lighting device is configured to be detachably mounted inside the light case based on coupling the substrate connector to the connector in the light case, and
wherein the light case further defines an opening that is provided between the rear panel and the door liner and configured to expose the recess space and to provide access to the lighting device in the recess space.

### Claim 2 (depends on 1)

The refrigerator according to claim 1, wherein the door further comprises a protrusion that is disposed at the door liner and protrudes rearward relative to the rear panel, and
wherein the insulating material is provided in the protrusion, and the light case is disposed inside the protrusion.

### Claim 3 (depends on 2)

The refrigerator according to claim 2, wherein the front panel comprises:
a see-through portion that allows a rear space of the door to be visible from an outside of the door; and
a bezel portion disposed around the see-through portion, and
wherein the light case is disposed at the bezel portion.

### Claim 4 (depends on 3)

The refrigerator according to claim 3, wherein the protrusion is one of protrusions that are disposed at sides of the see-through portion, and
wherein the lighting device is one of lighting devices that are disposed at the protrusions, respectively, the lighting devices being configured to emit light toward each other.

### Claim 5 (depends on 3)

The refrigerator according to claim 3, wherein the protrusion is disposed along at least one side of the see-through portion.

### Claim 6 (depends on 2)

The refrigerator according to claim 2, wherein the protrusion is one of a pair of protrusions that are spaced apart from each other and have inner surfaces facing each other, the pair of protrusions extending vertically along the door liner,
wherein the light case is one of a pair of light cases that are accommodated in the pair of protrusions, respectively,
wherein each of the pair of protrusions defines:
a basket mounting portion configured to support a door basket, and
a light opening that accommodates one of the pair of light cases, and
wherein the basket mounting portion and the lighting opening are defined at the inner surfaces of the pair of protrusions.

### Claim 7 (depends on 6)

The refrigerator according to claim 6, wherein the light opening is a cut portion at an end of the door liner facing a rear surface of the rear panel, the light opening extending vertically along each of the pair of protrusions.

### Claim 8 (depends on 6)

The refrigerator according to claim 6, wherein the lighting device is disposed between the basket mounting portion and the rear panel.

### Claim 9 (depends on 8)

The refrigerator according to claim 8, wherein the door basket is one of a plurality of door baskets that are spaced apart from one another in a vertical direction, and
wherein the lighting device extends through the plurality of door baskets in the vertical direction.

### Claim 10 (depends on 2)

The refrigerator according to claim 2, wherein the light case comprises:
an accommodation portion that defines the recess space and is exposed through the door liner, the accommodation portion being recessed from the light case and accommodating the lighting device;
a plurality of first supporters that are arranged along the accommodation portion and protrude from the light case in a first direction, the plurality of first supporters being configured to support an inner surface of the protrusion; and
a second supporter that extends along the accommodation portion and protrudes in a second direction opposite to the first direction, the second supporter being in contact with the panel assembly.

### Claim 11 (depends on 10)

The refrigerator according to claim 10, wherein the light case further comprises a connecting portion that is disposed at the accommodation portion,
wherein the connector in the light case is disposed at the connecting portion and connected to the lighting device through an electric wire, at least a portion of the electric wire being disposed at the connecting portion, and
wherein the lighting device is connected to the connector at a position inside the accommodation portion.

### Claim 12 (depends on 10)

The refrigerator according to claim 10, wherein each of the plurality of first supporters comprises:
a contact portion that is in contact with the inner surface of the protrusion and extends to an end of the protrusion; and
a partition portion that extends from the accommodation portion and the contact portion and partitions an inside of the protrusion.

### Claim 13 (depends on 12)

The refrigerator according to claim 12, wherein the plurality of first supporters define a plurality of partition portion grooves, respectively, the partition portion of each of the plurality of first supporters defining one of the plurality of partition portion grooves, and
wherein the insulating material is provided into the protrusion through the plurality of partition portion grooves.

### Claim 14 (depends on 10)

The refrigerator according to claim 10, wherein a front surface of the accommodation portion supports a rear surface of the panel assembly, and
wherein the second supporter supports the perimeter of the panel assembly.

### Claim 15 (depends on 1)

The refrigerator according to claim 1, wherein the lighting device further comprises:
a light frame that supports the substrate and defines a first open surface; and
a light cover that covers the first open surface of the light frame and is configured to transmit light emitted from the LEDs, and
wherein the light cover further covers the recess space of the light case.

### Claim 16 (depends on 15)

The refrigerator according to claim 15, wherein the LEDs comprise red-green-blue (RGB) LEDs and are configured to emit light having one or more colors selected by a user.

### Claim 17 (depends on 15)

The refrigerator according to claim 15, wherein the light frame comprises:
a first reflective surface and a second reflective surface that are spaced apart from each other and faces each other; and
a substrate supporter that connects the first reflective surface to the second reflective surface and supports the substrate, and
wherein the light frame further defines a second open surface that is covered by the substrate.

### Claim 18 (depends on 17)

The refrigerator according to claim 17, wherein the first reflective surface is disposed adjacent to the panel assembly,
wherein the second reflective surface is disposed farther from the panel assembly than the first reflective surface, and
wherein an inclination of the second reflective surface relative to the rear panel is greater than an inclination of the first reflective surface relative to the rear panel.

### Claim 19 (depends on 15)

The refrigerator according to claim 15, wherein the substrate is one of a plurality of substrates that are connected electrically in series, and
wherein the refrigerator further comprises:
a main signal line connected to one of the plurality of substrates, and
a sub signal line that connects the plurality of substrates to one another.

### Claim 20 (depends on 15)

The refrigerator according to claim 15, wherein the lighting device is detachably mounted to the light case through the liner opening of the door liner and the opening of the light case, and
wherein the substrate connector is disposed at a rear surface of the substrate.