Hybrid cooking appliance with microwave and induction heating features

Patent metadata

Field	Value
Publication number	US-11457515-B2
Application number	US-202016750215-A
Country	US
Kind code	B2
Filing date	Jan 23, 2020
Priority date	Jan 23, 2020
Publication date	Sep 27, 2022
Grant date	Sep 27, 2022

Abstract

A cooking appliance, as provided herein, may include a cabinet, a magnetron, an induction heating coil, and a one-way field filter. The cabinet may define a cooking chamber. The magnetron may be mounted within the cabinet in communication with the cooking chamber to direct a microwave thereto. The induction heating coil may be mounted within the cabinet to direct a magnetic field thereto. The one-way field filter may be disposed within the cabinet between the induction heating coil and the cooking chamber to restrict passage of the microwave therethrough while permitting the magnetic field. The one-way filter may include a lower layer and an upper layer. The lower layer may include a plurality of parallel conductive bands extending in a first direction. The upper layer may be disposed above the lower layer. The upper layer may include a plurality of parallel conductive bands extending in the second direction.

First claim

What is claimed is:

1. A cooking appliance comprising:
a cabinet defining a cooking chamber;
a magnetron mounted within the cabinet in communication with the cooking chamber to direct a microwave thereto;
an induction heating coil mounted within the cabinet in communication with the cooking chamber to direct a magnetic field thereto; and
a one-way field filter disposed within the cabinet between the induction heating coil and the cooking chamber to restrict passage of the microwave therethrough while permitting the magnetic field, the one-way filter comprising
a lower layer comprising a plurality of parallel conductive bands extending in a first direction, the plurality of parallel conductive bands of the lower layer being spaced apart by a set first gap in a second direction perpendicular to the first direction, the first set gap being greater than 0.2 millimeters, and
an upper layer disposed above the lower layer, the upper layer comprising a plurality of parallel conductive bands extending in the second direction, the plurality of conductive bands of the upper layer being spaced apart by a set second gap in the first direction, the second set gap being greater than 0.2 millimeters.

2. The cooking appliance of claim 1 , wherein the one-way filter further comprises an insulation layer sandwiched between the lower layer and the upper layer.

3. The cooking appliance of claim 2 , wherein the insulation layer comprises a mineral wool.

4. The cooking appliance of claim 2 , wherein the insulation layer defines a vertical thickness between the lower layer and the upper layer, the vertical thickness being about 1 millimeter.

5. The cooking appliance of claim 1 , further comprising a turntable assembly disposed within the cabinet, the turntable assembly comprising
a rotatable platter positioned above the one-way field filter, and
a drive rod extending from the rotatable platter through the one-way field filter.

6. The cooking appliance of claim 1 , wherein each band of the plurality of parallel conductive bands of the lower layer defines a width of about 3 millimeters, and wherein each band of the plurality of parallel conductive bands of the upper layer defines a width of about 3 millimeters.

7. The cooking appliance of claim 1 , wherein the plurality of parallel conductive bands of the lower layer are arranged at a first horizontal pitch of about 3.5 millimeters, and wherein the plurality of parallel conductive bands of the upper layer are arranged at a second horizontal pitch of about 3.5 millimeters.

8. The cooking appliance of claim 1 , wherein the first set gap is about 0.5 millimeters, and wherein the second set gap is about 0.5 millimeters.

9. The cooking appliance of claim 1 , further comprising an upper heater module mounted within the cabinet above the one-way filter field to direct a generated heat to the cooking chamber, the upper heater module comprising a resistive heating element or a radiant heating element.

10. The cooking appliance of claim 1 , a convection module having one or more heating elements and a convection fan operable to move air within the cooking cavity.

11. A cooking appliance comprising:
a cabinet defining a cooking chamber;
a magnetron mounted within the cabinet in communication with the cooking chamber to direct a microwave thereto;
an induction heating coil mounted within the cabinet in communication with the cooking chamber to direct a magnetic field thereto; and
a one-way field filter disposed within the cabinet between the induction heating coil and the cooking chamber to restrict passage of the microwave therethrough while permitting the magnetic field, the one-way filter comprising
a lower layer comprising a plurality of parallel conductive bands extending in a first direction, the plurality of parallel conductive bands of the lower layer being spaced apart by a set first gap in a second direction perpendicular to the first direction, each band of the plurality of conductive bands of the lower layer defining a first width in the second direction, the set first gap being between 10% and 30% of the first width, and
an upper layer disposed above the lower layer, the upper layer comprising a plurality of parallel conductive bands extending in the second direction, the plurality of conductive bands of the upper layer being spaced apart by a set second gap in the first direction, each band of the plurality of conductive bands of the upper layer defining a second width in the first direction, the set second gap being between 10% and 30% of the second width.

12. The cooking appliance of claim 11 , wherein the one-way filter further comprises an insulation layer sandwiched between the lower layer and the upper layer.

13. The cooking appliance of claim 12 , wherein the insulation layer comprises a mineral wool.

14. The cooking appliance of claim 12 , wherein the insulation layer defines a vertical thickness between the lower layer and the upper layer, the vertical thickness being about 1 millimeter.

15. The cooking appliance of claim 11 , further comprising a turntable assembly disposed within the cabinet, the turntable assembly comprising
a rotatable platter positioned above the one-way field filter, and
a drive rod extending from the rotatable platter through the one-way field filter.

16. The cooking appliance of claim 11 , wherein each band of the plurality of parallel conductive bands of the lower layer defines a width of about 3 millimeters, and wherein each band of the plurality of parallel conductive bands of the upper layer defines a width of about 3 millimeters.

17. The cooking appliance of claim 11 , wherein the plurality of parallel conductive bands of the lower layer are arranged at a first horizontal pitch of about 3.5 millimeters, and wherein the plurality of parallel conductive bands of the upper layer are arranged at a second horizontal pitch of about 3.5 millimeters.

18. The cooking appliance of claim 11 , wherein the first set gap is about 0.5 millimeters, and wherein the second set gap is about 0.5 millimeters.

19. The cooking appliance of claim 11 , further comprising an upper heater module mounted within the cabinet above the one-way filter field to direct a generated heat to the cooking chamber, the upper heater module comprising a resistive heating element or a radiant heating element.

20. The cooking appliance of claim 11 , a convection module having one or more heating elements and a convection fan operable to move air within the cooking cavity.

Assignees

• Haier Us Appliance Solutions Inc

Inventors

• Lim Tae-Hoon
• Shin Dong Soo
• Kwon Hyuk-Chul
• Lee Byung Cheon
• Park Ju Chan
• Lee Jaebong
• Oh Youngjin

Classifications

• H05B6/6402

  Aspects relating to the microwave cavity · CPC title

• H05B6/647 Primary

  Aspects related to microwave heating combined with other heating techniques · CPC title

• H05B6/642

  Cooling of the microwave components and related air circulation systems (H05B6/6473 takes precedence) · CPC title

• H05B6/6488 Primary

  combined with induction heating · CPC title

• H05B6/76

  Prevention of microwave leakage, e.g. door sealings · CPC title