Appliance for drying articles

Patent metadata

Field	Value
Publication number	US-10823502-B2
Application number	US-201916709977-A
Country	US
Kind code	B2
Filing date	Dec 11, 2019
Priority date	Aug 14, 2013
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

An RF laundry dryer includes, amongst other things, an RF generator, an RF applicator having a perforated body and anode and cathode elements, a fan arranged relative to the perforated body to flow or draw air through the perforated body and an electromagnetic shield protecting the fan from the e-field. Both anode and cathode elements are operably coupled to the RF generator to generate an e-field between the anode and cathode upon the energizing of the RF generator.

First claim

What is claimed is:

1. A radio frequency (RF) laundry dryer comprising:
a non-rotatable, perforated planar drying surface for receiving and supporting wet textiles;
an RF generator;
an RF applicator located beneath the non-rotatable, perforated planar drying surface and comprising an anode element and a cathode element operably coupled to the RF generator, wherein the arrangement of the RF applicator is configured to generate an e-field between the anode element and the cathode element that extends above the non-rotatable, perforated planar drying surface;
at least one fan configured to flow air in a linear direction;
a series of spaced baffles sequentially arranged along the linear direction of the air flow along the non-rotatable, perforated planar drying surface and below the planar drying surface, and commonly oriented to redirect the air flow through the non-rotatable, perforated planar drying surface; and
an electromagnetic shield having a conductive layer and located between the fan and the cathode and anode elements to electromagnetically protect the at least one fan from the e-field.

2. The RF laundry dryer of claim 1 wherein the cathode element is a planar cathode element.

3. The RF laundry dryer of claim 2 wherein the anode element is a planar anode element.

4. The RF laundry dryer of claim 3 wherein the anode element and the cathode element are coplanar.

5. The RF laundry dryer of claim 1 wherein the electromagnetic shield comprises a second perforated body supporting the anode element and the cathode element, and wherein a dimension of perforations of the second perforated body is selected to at least one of mitigate or prevent e-field leakage toward the fan.

6. The RF laundry dryer of claim 1 wherein at least one of the series of spaced baffles is fluidly located between the at least one fan and the non-rotatable, perforated planar drying surface.

7. The RF laundry dryer of claim 1 wherein the RF generator is configured to generate an e-field at a frequency between 13.553 MHz and 13.567 MHz.

8. The RF laundry dryer of claim 1 wherein the anode element and the cathode element are sandwiched between the non-rotatable, perforated planar drying surface and a second perforated planar body.

9. The RF laundry dryer of claim 8 wherein the non-rotatable, perforated planar drying surface and the second perforated planar body comprise perforations of a size to maximize air flow through the non-rotatable, perforated planar drying surface and the second perforated planar body.

10. The RF laundry dryer of claim 8 wherein the perforations of the non-rotatable, perforated planar drying surface and the second perforated planar body are aligned.

11. The RF laundry dryer of claim 10 wherein the series of spaced baffles are further oriented to redirect the air flow through the aligned perforations of the non-rotatable, perforated planar drying surface and the second perforated planar body.

12. The RF laundry dryer of claim 1 wherein the non-rotatable, perforated planar drying surface includes perforations of a size to prevent textile material placed on the non-rotatable, perforated planar drying surface from drooping into the RF applicator.

13. The RF laundry dryer of claim 1 wherein the anode element includes a tree element having a tree base from which extend a first plurality of digits and wherein the cathode element includes a comb element having a comb base from which extend a second plurality of digits, and wherein the first plurality of digits and the second plurality of digits are interdigitally arranged.

14. The RF laundry dryer of claim 13 wherein the anode element includes a third plurality of digits extending from a side of the tree base opposite to the first plurality of digits.

15. The RF laundry dryer of claim 14 wherein the cathode element includes a fourth plurality of digits, and wherein the third plurality of digits and the fourth plurality of digits are interdigitally arranged.

16. A method of drying laundry, comprising:
operating a fan to flow air beneath a perforated planar drying surface of a radio frequency (RF) applicator;
redirecting the air flow, by way of a series of spaced baffles sequentially arranged in a linear direction of the air flow along the perforated planar drying surface and below the perforated planar drying surface and commonly oriented to redirect the air flow through the perforated planar drying surface while an e-field generated by a planar anode element and a planar cathode element extends above the perforated planar drying surface; and
electromagnetically shielding the fan from the e-field;
wherein the planar anode element and the planar cathode element are coplanar.

17. The method of claim 16 further including disposing at least one perforation of the perforated planar drying surface and at least one of the series of spaced baffles relative to each other such that the redirecting the air is maximized.

18. The method of claim 16 wherein the redirecting the air includes redirecting the air through a wet textile.

19. The method of claim 16 wherein shielding the fan from the e-field includes shielding by way of an electromagnetic shield disposed between the fan and the RF applicator.

20. The method of claim 16 wherein the redirecting the air includes redirecting the air from a vector parallel to the perforated planar drying surface to a vector orthogonal to the perforated planar drying surface.

Assignees

• Whirlpool Co

Inventors

• Herman Mark L
• Peterman Garry L

Classifications

• F26B3/343 Primary

  in combination with convection · CPC title

• D06F58/20 Primary

  General details of domestic laundry dryers  (D06F59/00 takes precedence) · CPC title

• D06F58/266

  Microwave heating equipment · CPC title

• H05B6/62

  Apparatus for specific applications · CPC title

• H05B6/54

  Electrodes · CPC title