Steam generator and cooking apparatus including steam generator

Patent metadata

Field	Value
Publication number	US-11828458-B2
Application number	US-201816481053-A
Country	US
Kind code	B2
Filing date	Jan 23, 2018
Priority date	Jan 26, 2017
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

A steam generator and a cooking apparatus including a steam generator are provided. The steam generator may include a heater, an inflow tube, a steam generation tube, and a discharge tube and an adaptor unit connected to the steam generator may be provided. The inflow tube and the discharge tube and the discharge tube may be connected at a predetermined angle to the adaptor unit. Thus, the steam generation tube connecting the inflow tube to the discharge tube may also be inclined.

First claim

What is claimed is:

1. A steam generator, comprising:
at least one u-shaped heater configured to provide heat;
an inclined u-shaped heating tube configured to generate steam by receiving the heat from the at least one u-shaped heater, wherein the at least on u-shaped heater corresponds in shape to the inclined u-shaped heating tube and extends along an outer surface along a length thereof;
a water supply and drain tube configured to receive water into the steam generator and supply the water to the u-shaped heating tube;
a first connection tube that connects the water supply and drain tube and an inflow tube of the u-shaped heating tube;
a branch tube branched so that steam and water discharged from the u-shaped heating tube are divided and the branch tube extends in parallel with the water supply and drain tube;
a collection tube connected to the branch tube and the water supply and drain tube to collect the water discharged from the u-shaped heating tube into the water supply and drain tube;
a second connection tube that connects the branch tube and a discharge tube of the u-shaped heating tube; and
a steam discharge tube connected to the branch tube to provide a passage through which the steam flows out of the steam generator, wherein the u-shaped heating tube extends from the first connection tube to the second connection tube in the u-shape, wherein the first connection tube is inclined at a first angle from an end of the water supply and drain tube based on a direction in which the water supply and drain tube extends such that residual water is removed from the u-shaped heating tube, wherein the second connection tube extends inclined at a second angle from a first end of the branch tube based on a direction in which the branch tube extends such that residual water is removed from the u-shaped heating tube, and wherein the steam discharge tube extends inclined at a third angle from a second end of the branch tube based on the direction in which the branch tube extends such that a condensed water is introduced into the collection tube.

2. The steam generator according to claim 1 , wherein the u-shaped heating tube comprises:
the inflow tube into which the water is introduced;
a steam generation tube connected to the inflow tube, the steam generation tube having a predetermined curvature; and
the discharge tube connected to the steam generation tube to provide a passage through which the steam flows.

3. The steam generator according to claim 2 , wherein the inflow tube is connected to the first connection tube in a straight line.

4. The steam generator according to claim 3 , wherein the first angle is an angle ranging from about 15 degrees to about 30 degrees between a central axis of the water supply and drain tube and a central axis of the first connection tube.

5. The steam generator according to claim 2 , wherein the discharge tube is connected to the second connection tube in a straight line.

6. The steam generator according to claim 5 , wherein the second angle is an angle ranging from about 15 degrees to about 30 degrees between a central axis of the branch tube and a central axis of the second connection tube.

7. The steam generator according to claim 1 , further comprising:
a water level sensor installed in the collection tube to detect a water level.

8. The steam generator according to claim 7 , further comprising:
a temperature sensor installed in the heating tube to detect a temperature.

9. A cooking apparatus, comprising:
a cavity having a cooking chamber;
a steam generator configured to provide steam to the cooking chamber;
a water supply tank configured to store water supplied to the steam generator; and
a drain tank in which residual water of the steam generator is stored, wherein the steam generator comprises:
a steam generation unit provided with at least one u-shaped heater configured to provide heat and an inclined u-shaped heating tube configured to receive the heat from the at least one u-shaped heater so as to generate steam, wherein the at least one u-shaped heater corresponds in shape to the inclined u-shaped heating tube and extends along an outer surface along a length thereof;
an adaptor unit provided with a water supply and drain tube configured to supply water to the u-shaped heating tube;
a first connection tube that connects the water supply and drain tube and an inflow tube of the u-shaped heating tube;
a branch tube branched so that steam and water discharged from the u-shaped heating tube are divided and the branch tube extends in parallel with the water supply and drain tube;
a collection tube connected to the branch tube and the water supply and drain tube to collect the water into the water supply and drain tube;
a second connection tube that connects the branch tube and a discharge tube of the u-shaped heating tube; and
a steam discharge tube configured to provide a passage through which the steam flows out of the steam generator, wherein the u-shaped heating tube extends from the first connection tube to the second connection tube in the u-shape, wherein the first connection tube is inclined at a first angle from an end of the water supply and drain tube based on a direction in which the water supply and drain tube extends such that residual water is removed from the u-shaped heating tube, wherein the second connection tube extends inclined at a second angle from a first end of the branch tube based on a direction in which the branch tube extends such that residual water is removed from the heating tube, and wherein the steam discharge tube extends inclined at a third angle from a second end of the branch tube based on the direction in which the branch tube extends such that a condensed water is introduced into the collection tube.

10. The cooking apparatus according to claim 9 , wherein the water supply and drain tube comprises:
a first valve provided in a passage connected to the water supply tank; and
a second valve provided in a passage connected to the drain tank.

11. The cooking apparatus according to claim 10 , wherein the steam generator further comprises a water level sensor configured to detect a water level, where switching operations of the first valve and the second valve are interlocked with each other according to information of the water level detected by the water level sensor.

12. A cooking appliance comprising the steam generator according to claim 1 .

13. The steam generator according to claim 1 , wherein the branch tube is in fluid communication with the steam generation tube, the steam discharge tube, and the water supply and drain tube, and is configured to direct steam to the steam discharge tube and residual water to the water supply and drain tube.

Assignees

• Lg Electronics Inc

Inventors

• Sim Hoonseob
• Yang Jaekyung
• Lee Suyong
• Lee Yongsoo

Classifications

• F22B1/28 Primary

  in boilers heated electrically · CPC title

• A47J27/04

  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

• F22B1/282 Primary

  with water or steam circulating in tubes or ducts · CPC title

• F22B1/284 Primary

  with water in reservoirs · CPC title

• F22B29/023

  without drums, i.e. without hot water storage in the boiler · CPC title