Microwave cooking appliance with increased visibility into the cavity

Patent metadata

Field	Value
Publication number	US-12225652-B2
Application number	US-202318506497-A
Country	US
Kind code	B2
Filing date	Nov 10, 2023
Priority date	Mar 31, 2020
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

Abstract

A microwave cooking appliance for increasing visibility into the cooking cavity. The microwave cooking appliance may include a door. The door may include a conductive mesh layer. The door may include a frame supporting the conductive mesh layer. The door may include a conductive and/or sealing engagement between the conductive mesh layer and the frame.

First claim

The invention claimed is:

1. A microwave cooking appliance comprising:
a housing having a door to form a cooking cavity, wherein the door includes an interior face arranged to face towards the cooking cavity and an exterior face arranged to face away from the cooking cavity; and
the door comprising
one or more conductive mesh layers and one or more glass layers;
at least one frame having an outer periphery and a choke groove extending along the outer periphery, wherein the at least one frame supports the one or more conductive mesh layers and the one or more glass layers, and wherein the one or more conductive mesh layers are electrically grounded to the at least one frame; and
wherein in a direction from the interior face of the door towards the exterior face of the door, the at least one frame is positioned followed by the one or more conductive mesh layers.

2. The microwave cooking appliance of claim 1 wherein the door further includes one or more conductive engagements between the at least one frame and the one or more conductive mesh layers electrically grounding the at least one frame to the one or more conductive mesh layers.

3. The microwave cooking appliance of claim 2 wherein the one or more conductive engagements include at least one mechanical fastener.

4. The microwave cooking appliance of claim 2 wherein the one or more conductive engagements include at least one conductive gasket.

5. The microwave cooking appliance of claim 2 wherein the one or more conductive engagements include at least one conductive tape.

6. The microwave cooking appliance of claim 1 wherein the one or more conductive mesh layers include one or more conductive wires.

7. The microwave cooking appliance of claim 1 wherein the one or more conductive mesh layers include conductive nano-structures on one or more films.

8. The microwave cooking appliance of claim 1 wherein the one or more glass layers include an inner glass layer and an outer glass layer, wherein the one or more conductive mesh layers are between the inner glass layer and the outer glass layer.

9. The microwave cooking appliance of claim 1 wherein the one or more conductive mesh layers include an EMI shielding effectiveness of about 30 dB to about 70 dB and/or an optical transmittance of about 88% to about 99%.

10. The microwave cooking appliance of claim 1 wherein the at least one frame is molded to the one or more conductive mesh layers and/or the one or more glass layers.

11. The microwave cooking appliance of claim 1 wherein at least a portion of the choke groove is made of the one or more conductive mesh layers and/or the one or more glass layers.

12. A door for a microwave cooking appliance comprising:
one or more conductive mesh layers;
at least one frame supports the one or more conductive mesh layers, and wherein at least a portion of the one or more conductive mesh layers are electrically grounded to the at least one frame; and
wherein in a direction from an interior face of the at least one frame towards an exterior face of the at least one frame, the exterior face of the at least one frame is positioned followed by the one or more conductive mesh layers.

13. The door of claim 12 further comprising one or more glass layers supported by the at least one frame.

14. The door of claim 12 wherein the one or more conductive mesh layers include conductive nano-structures on one or more films.

15. The door of claim 12 further includes one or more conductive engagements grounding the portion of the one or more conductive mesh layers to the at least one frame.

16. The door of claim 12 wherein the one or more conductive mesh layers include at least a metal mesh.

17. A method of grounding a conductive mesh layer to a frame of a microwave door comprising:
providing at least one conductive mesh layer having at least one metal mesh layer;
providing at least one frame defining at least one through opening, and wherein the at least one frame includes an interior face and an exterior face; and
electrically grounding the at least one metal mesh layer to the exterior face of the at least one frame defining the at least one through opening with one or more conductive engagements.

18. The method of claim 17 further comprising engaging one or more glass layers to at least one of the at least one frame and/or the at least one conductive mesh layer.

19. The method of claim 17 wherein the at least one conductive mesh layer includes at least one film, wherein the at least one metal mesh layer is positioned on the at least one film.

20. The method of claim 17 wherein the at least one conductive mesh layer includes an EMI shielding effectiveness of about 30 dB to about 70 dB.

21. The method of claim 17 wherein the at least one conductive mesh layer includes an optical transmittance of about 88% to about 99%.

22. The method of claim 17 wherein the at least one frame includes a choke groove.

23. The method of claim 17 wherein the one or more conductive engagements between the at least one frame and the at least one metal mesh layer includes at least one of a conductive glass sealant, a conductive gasket, a conductive tape, and/or a mechanical fastener electrically grounding the at least one frame to the at least one metal mesh layer.

Assignees

• Midea Group Co Ltd

Inventors

• Trice Daniel J
• Langness Brian
• Woodling Pierce

Classifications

• H05B6/766

  Microwave radiation screens for windows · CPC title

• H05B6/763

  Microwave radiation seals for doors · CPC title

• H05B6/6414 Primary

  Aspects relating to the door of the microwave heating apparatus · CPC title