# US 10,865,994 B2 · Cooking appliance

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- Number: US 10,865,994 B2
- Document ID: US10865994B2
- Status: Granted
- Kind: B2
- Application number: 16/017,446
- Filed: 2018-06-25
- Published: 2019-01-03
- Granted: 2020-12-15
- Earliest claimed: 2017-06-30
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Dongjae Lee; Youngsoo Kim; Hyun Woo Park
- Web page: https://patentgrep.com/patent/US10865994B2

## CPC

- F24C 7/062: {on stoves}
- F24C 7/06: Arrangement or mounting of electric heating elements
- F24C 7/081: {on stoves}
- F24C 15/002: {for stoves of the closed type}
- F24C 15/04: with transparent panels
- F24C 15/18: Arrangement of compartments additional to cooking compartments, e.g. for warming or for storing utensils or fuel containers; Arrangement of additional heating or cooking apparatus, e.g. grills
- F24C 15/32: Arrangements of ducts for hot gases, e.g. in or around baking ovens
- F24C 15/325: {electrically-heated}
- F24C: DOMESTIC STOVES OR RANGES (exclusively for solid fuels F24B); DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION

## Abstract

A cooking appliance is provided that may include a main body having a cooking chamber formed therein and including a rear surface, a lower surface, and a side surface; a lower case provided below the lower surface to form an accommodation space therein; first and second heaters, the second heater installed in the accommodation space and configured to generate heat; a first discharge port through which an inside of the lower case communicates with an outside of the main body; a second discharge port through which an inside of the cooking chamber communicates with the outside of the main body; and a flow path connection member configured to form a flow path guide to guide heated air discharged through the first discharge port toward the second discharge port.

## Claims

### Claim 1

A cooking appliance, comprising:
a main body having a cooking chamber formed therein and including a rear surface configured to define a rear boundary of the cooking chamber, a lower surface configured to define a lower boundary of the cooking chamber, and at least one side surface configured to define a side boundary of the cooking chamber;
a lower case provided below the lower surface and having an accommodation space formed therein;
first and second heaters, the second heater being installed in the accommodation space and configured to generate heat;
a first discharge port configured to allow an inside of the lower case having the accommodating space formed therein to communicate with an outside of the main body;
a second discharge port configured to allow an inside of the cooking chamber to communicate with the outside of the main body; and
a flow path connection member configured to form a flow path guide to guide heat discharged through the first discharge port toward the second discharge port, wherein the flow path connection member includes:
duct sections provided outside the cooking chamber and configured to form an outer wall surrounding the flow path guide from the outside of the main body; and
at least one coupling flange configured to couple the duct sections to at least one of the lower case or the at least one side surface, wherein the flow path guide forms a path that connects the first discharge port and the second discharge port in a space surrounded by the duct sections, wherein the duct sections include:
a first duct section configured to form an outer wall surrounding a peripheral portion of the first discharge port; and
a second duct section configured to form an outer wall surrounding a peripheral portion of the second discharge port, and wherein the first duct section is pressed against the lower case, and the second duct section is pressed against the at least one side surface inside at least one side space of the main body.

### Claim 2 (depends on 1)

The cooking appliance of claim 1, wherein the main body further includes:
a lower space formed at a lower portion of the main body and separated from the cooking chamber under the cooking chamber; and
the at least one side space which is formed at at least one side of the main body and separated from the cooking chamber, and wherein the lower case is installed inside the lower space, and the flow path connection member forms the flow path guide that passes through the at least one side space.

### Claim 3 (depends on 2)

The cooking appliance of claim 2, wherein the first duct section is inserted into and installed in a space formed between the lower case and the lower space.

### Claim 4 (depends on 1)

The cooking appliance of claim 1, wherein:
the second discharge port passes through the at least one side surface;
the lower case includes at least one side wall configured to define a side boundary of an accommodation space, the at least one side wall including the first discharge port passing therethrough;
the side wall is located more laterally inward than the at least one side surface;
the flow path connection member is formed by connecting the first duct section and the second duct section to form an “L” shape.

### Claim 5 (depends on 1)

The cooking appliance of claim 1, further comprising a heat guide configured to change a flow direction of heated air that flows upward through the flow path guide to allow the heated air to pass through the second discharge port.

### Claim 6 (depends on 5)

The cooking appliance of claim 5, wherein the heat guide protrudes in a lateral direction on the at least one side surface and has an inclined surface, wherein a distance from the inclined surface to the at least one side surface decreases in an upward direction.

### Claim 7 (depends on 5)

The cooking appliance of claim 5, wherein:
the heat guide is formed by incising a part of the at least one side surface and bending the incised portion outward from the at least one side surface; and
the second discharge port is formed at a portion of the at least one side surface where the heat guide is separated.

### Claim 8 (depends on 7)

The cooking appliance of claim 7, wherein the heat guide is obliquely bent to form an acute angle with respect to the at least one side surface.

### Claim 9 (depends on 1)

The cooking appliance of claim 1, further comprising a first heating assembly provided inside the cooking chamber configured to generate a circulation flow of heated air within the cooking chamber, wherein the first heating assembly includes the first heater.

### Claim 10 (depends on 9)

The cooking appliance of claim 9, wherein the first heating assembly further includes:
a fan cover provided at a rear surface of the cooking chamber that forms a divided space inside the cooking chamber and including a suction port and a discharge port;
the first heater installed in the divided space that generates heat; and
a convection fan provided within the divided space and configured to generate an air circulation flow in which air introduced into the divided space through the suction port is heated by the first heater and discharged to the cooking chamber through the discharge port on the fan cover.

### Claim 11 (depends on 10)

The cooking appliance of claim 10, wherein the heated air discharged into the cooking chamber through the second discharge port on the at least one side surface of the main body combines with the circulation flow of the heated air generated by the first heating assembly and circulates inside the cooking chamber.

### Claim 12

A cooking appliance, comprising:
a main body having a cooking chamber formed therein and including a rear surface configured to define a rear boundary of the cooking chamber, a lower surface configured to define a lower boundary of the cooking chamber, and at least one side surface configured to define a side boundary of the cooking chamber;
a lower case provided below the lower surface and having an accommodation space formed therein;
first and second heaters, the second heater being installed in the accommodation space and configured to generate heat;
a first discharge port configured to allow an inside of the lower case having the accommodating space formed therein to communicate with an outside of the main body;
a second discharge port configured to allow an inside of the cooking chamber to communicate with the outside of the main body; and
a flow path connection member configured to form a flow path guide to guide heat discharged through the first discharge port toward the second discharge port, wherein the flow path connection member includes:
duct sections provided outside the cooking chamber and configured to form an outer wall surrounding the flow path guide from the outside of the main body; and
at least one coupling flange configured to couple the duct sections to at least one of the lower case or the at least one side surface, wherein the flow path guide forms a path that connects the first discharge port and the second discharge port in a space surrounded by the duct sections, and wherein the at least one coupling flange protrudes from an edge of each of the duct sections abutting the at least one side surface of the main body or a side wall of the lower case and is parallel to the at least one side surface of the main body or the side wall of the lower case to be in surface contact with the at least one side surface of the main body or the side wall of the lower case.

### Claim 13 (depends on 12)

The cooking appliance of claim 12, further comprising a clip provided at an outer side of the at least one side surface of the main body and configured to press the at least one coupling flange toward the at least one side surface of the main body to be pressed against the at least one side surface of the main body.

### Claim 14 (depends on 13)

The cooking appliance of claim 13, wherein:
an insertion groove having a closed upper portion and an open lower portion is formed between the at least one side surface of the main body and the clip;
the clip is coupled to the at least one side surface of the main body such that the upper portion of the insertion groove is located above the second discharge port; and
an upper end of the at least one coupling flange is inserted into the insertion groove to couple the flow path connection member to the at least one side surface of the main body.

### Claim 15

A cooking appliance, comprising:
a main body having a cooking chamber formed therein and including a rear surface configured to define a rear boundary of the cooking chamber, a lower surface configured to define a lower boundary of the cooking chamber, and at least one side surface configured to define a side boundary of the cooking chamber;
a lower case provided below the lower surface and having an accommodation space formed therein;
a first heating assembly including a first heater, a fan cover, and a convection fan, the convection fan and first heater arranged within the fan cover;
a second heating assembly including a second heater, the second heater being installed in the accommodation space and configured to generate heat;
a first discharge port configured to allow an inside of the lower case having the accommodating space formed therein to communicate with an outside of the main body;
a second discharge port configured to allow an inside of the cooking chamber to communicate with the outside of the main body; and
a flow path connection member configured to form a flow path guide to guide heat discharged through the first discharge port toward the second discharge port, wherein the flow path connection member includes:
duct sections provided outside the cooking chamber and configured to form an outer wall surrounding the flow path guide from the outside of the main body; and
at least one coupling flange configured to couple the duct sections to at least one of the lower case or the at least one side surface, wherein the flow path guide forms a path that connects the first discharge port and the second discharge port in a space surrounded by the duct sections, wherein the duct sections include:
a first duct section configured to form an outer wall surrounding a peripheral portion of the first discharge port; and
a second duct section configured to form an outer wall surrounding a peripheral portion of the second discharge port, and wherein the first duct section is pressed against the lower case, and the second duct section is pressed against the at least one side surface inside at least one side space of the main body.

### Claim 16 (depends on 15)

The cooking appliance of claim 15, wherein the fan cover includes a suction port and a third discharge port, wherein air is sucked in the suction port by the convection fan, heated by the first heater, and discharged through the third discharge port into the cooking chamber.

### Claim 17 (depends on 16)

The cooking appliance of claim 16, wherein heated air discharged into the cooking chamber through the third discharge port is mixed with heated air discharged into the cooking chamber through the second discharge port.

### Claim 18 (depends on 17)

The cooking chamber of claim 17, further comprising a heat guide configured to change a flow direction of heated air that flows upward through the flow path guide to allow the heated air to pass through the second discharge port, wherein bent sections of the at least one side surface form the heat guide.