Cooking appliance

Patent metadata

Field	Value
Publication number	US-10871291-B2
Application number	US-201916292865-A
Country	US
Kind code	B2
Filing date	Mar 5, 2019
Priority date	Apr 12, 2018
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

A cooking appliance includes a main body that defines a cooking chamber configured to receive one or more objects, a steam generator configured to generate steam to heat the one or more objects in the cooking chamber by steam, a water tank configured to store water and to supply water to the steam generator, a water supply pipe configured to cause supply of water from the water tank to the steam generator, a steam supply pipe configured to supply steam generated by the steam generator to the cooking chamber, and a return pipe that is connected to the steam supply pipe and to the steam generator. The return pipe is configured to allow water discharged to the steam supply pipe to return to the steam generator.

First claim

What is claimed is:

1. A cooking appliance comprising:
a main body that defines a cooking chamber configured to receive one or more objects;
a steam generator configured to generate steam to heat the one or more objects in the cooking chamber by steam, wherein the steam generator comprises: a heating chamber configured to receive water;
a water tank configured to store water and to supply water to the steam generator;
a water supply pipe configured to supply water from the water tank to the steam generator;
a water supply part configured to supply water to the heating chamber;
a steam supply pipe configured to supply steam generated by the steam generator to the cooking chamber;
a return pipe that is connected to the steam supply pipe and to the steam generator, the return pipe being configured to allow water discharged to the steam supply pipe to return to the steam generator;
a return part connected to the return pipe, wherein the return part is located vertically higher than a maximum water level of the heating chamber and vertically higher than the water supply part; and
a partitioning part located vertically lower than the return part and higher than the water supply part.

2. The cooking appliance of claim 1 , wherein the steam generator comprises:
a first body; and
a second body configured to couple to the first body, the first body and the second body being configured to, based on coupling to each other, define the heating chamber, and
wherein the partitioning part protrudes from one of the first body or the second body, the partitioning part having an end that is spaced apart from the other of the first body or the second body.

3. The cooking appliance of claim 2 , wherein the water supply part is located in the first body,
wherein the return part is located in the second body, and
wherein the partitioning part protrudes from the second body toward the first body, the end of the partitioning part being spaced apart from the first body.

4. The cooking appliance of claim 2 , wherein the return part is a passage defined at an inside of one of the first body of the steam generator or the second body of the steam generator.

5. The cooking appliance of claim 2 , wherein the steam generator further comprises a steam heater configured to heat water in the heating chamber, and
wherein an upper portion of the steam heater is located vertically higher than the first body and the second body.

6. The cooking appliance of claim 2 , wherein the partitioning part protrudes from the first body toward the second body, the end of the partitioning part being spaced apart from the second body.

7. The cooking appliance of claim 1 , wherein the steam generator further comprises a steam discharge part configured to discharge steam to the steam supply pipe, and
wherein the return part is located vertically lower than the steam discharge part.

8. The cooking appliance of claim 7 , wherein the return part is located closer to the water supply part than to the steam discharge part.

9. The cooking appliance of claim 1 , wherein the steam supply pipe is bent one or more times, the steam supply pipe including a bent portion that is bent upward, and
wherein the return pipe is connected to the bent portion of the steam supply pipe.

10. The cooking appliance of claim 9 , wherein the steam supply pipe comprises:
a first supply pipe configured to receive steam discharged from the steam generator; and
a second supply pipe that is bent from the first supply pipe and that extends upward, and
wherein the return pipe extends downward from a boundary between the first supply pipe and the second supply pipe.

11. The cooking appliance of claim 10 , wherein an inner diameter of the return pipe is less than an inner diameter of the second supply pipe.

12. The cooking appliance of claim 11 , wherein the inner diameter of the return pipe is in a range of ⅕ to ¼ of the inner diameter of the second supply pipe.

13. The cooking appliance of claim 10 , wherein the first supply pipe extends downward from the boundary to the steam generator.

14. The cooking appliance of claim 10 , wherein the boundary between the first supply pipe and the second supply pipe includes an inclined surface that extends to the return pipe and that is configured to guide water to the return pipe.

15. The cooking appliance of claim 1 , further comprising a water supply pump connected to the water supply pipe and configured to cause supply of water from the water tank to the steam generator,
wherein the return pipe is configured to allow water to return to the steam generator based on operation of the water supply pump.

16. The cooking appliance of claim 2 , wherein the steam generator further comprises a partitioning part configured to divide the heating chamber into an upper chamber connected to the return part and a lower chamber connected to the water supply part.

17. The cooking appliance of claim 16 , wherein at least a portion of the partitioning part defines a gap between an end of the partitioning part and an inner surface of the steam generator, the gap being configured to allow water to drop from the upper chamber to the lower chamber.

Assignees

• Lg Electronics Inc

Inventors

• Lee Suyong
• Yang Jaekyung
• Yang Haksoon
• Lee Soochan
• Lee Yongsoo

Classifications

• F22D11/06

  for returning condensate to boiler · CPC title

• F22B1/285

  the water being fed by a pump to the reservoirs · CPC title

• A47J27/04 Primary

  for cooking food in steam; Devices for extracting fruit juice by means of steam {; Vacuum cooking vessels (steam-heated vessels for hotels, restaurants or canteens A47J27/16)} · CPC title

• A47J2027/043

  for cooking food in steam · CPC title

• F24C15/2007 Primary

  from oven cavities · CPC title