Method for drying articles

• US 10,184,718 B2
• Filed: 12/06/2016
• Issued: 01/22/2019
• Est. Priority Date: 07/17/2013
• Status: Active Grant

• Current Assignee: Whirlpool Corporation
• Original Assignee: Whirlpool Corporation
• Inventors: Herman, Mark L., Peterman, Garry L.
• Primary Examiner(s): Atkisson, Jianying
• Assistant Examiner(s): SULLENS, TAVIA L
• Application Number:
  US15/369,967
• Publication Number:
  US 20170082359A1
• Time in Patent Office: 777 Days
• CPC Class Codes: D06F 58/04 Details controlling or regulating devices D06F34/00
• CPC Class Codes: D06F 58/266 Microwave heating equipment
• CPC Class Codes: F26B 3/28 by radiation, e.g. from the sun
• CPC Class Codes: F26B 3/34 by using electrical effects
• CPC Class Codes: F26B 3/347 Electromagnetic heating, e.g. induction heating or heating using microwave energy
• CPC Class Codes: H05B 6/54 Electrodes
• CPC Class Codes: H05B 6/62 Apparatus for specific applications

Abstract

A method for drying an article with a radio frequency (RF) applicator having anode elements and cathode elements includes capacitively coupling the anode elements, capacitively coupling the cathode elements, capacitively coupling an anode element to a cathode element, and energizing the RF applicator to generate an RF field between anode and cathode elements wherein liquid residing within the field will be dielectrically heated.

Claims

1. A method to dry an article with a radio frequency (RF) applicator having a first anode element, a second anode element, a first cathode element, and a second cathode element, the method comprising:

electrically coupling a conductor of the RF applicator to the first anode element, and another conductor of the RF applicator to the first cathode element;

capacitively coupling the first anode element to the second anode element, and the first cathode element to the second cathode element;

capacitively coupling the second anode element to the second cathode element; and

energizing the RF applicator at an RF frequency to energize the first anode element and the first cathode element, thereby inducing energization between the first anode element and the second anode element, and between the first cathode element and the second cathode element respectively to generate a field of electromagnetic radiation (e-field) between the second anode and second cathode elements;

wherein liquid in the article residing within the e-field is dielectrically heated by the field to effect a drying of the article.

2. The method of claim 1, further comprising moving the RF applicator during the energization of the RF applicator.

3. The method of claim 2, further comprising a support element in the shape of a drum and the moving the RF applicator comprises rotation of the drum.

4. The method of claim 3 wherein the e-field is located above at least a portion of an inner surface of the drum and the article is supported on the inner surface of the drum.

5. The method of claim 4 wherein the rotation of the drum is at a speed to effect a slide motion of the article on the inner surface.

6. The method of claim 4 wherein the rotation of the drum is at a speed to effect a tumble motion of the article on the inner surface.

7. The method of claim 4 wherein the energization of the RF applicator comprises intermittent energization of the RF applicator.

8. The method of claim 7 wherein the rotation of the drum is related to the intermittent energization of the RF applicator.

9. The method of claim 4 wherein the capacitively coupling comprises capacitive coupling between the first and second anode elements at a first radial segment of the drum and capacitive coupling between the first and second cathode elements at a second radial segment of the drum, axially spaced from the first radial segment.

10. The method of claim 9 wherein the capacitively coupling comprises capacitive coupling through a first conductive ring encircling the drum about the first radial segment and a second ring encircling the drum about the second radial segment.

11. An article treatment appliance to dry an article according to a predetermined cycle of operation, comprising:

a first anode element and a first cathode element;

a second anode element and a second cathode element;

the first anode element capacitively coupled with the second anode element and operably separated by a non-conductive material;

the first cathode element capacitively coupled with the second cathode element and operably separated by the non-conductive material;

the second anode element capacitively coupled with the second cathode element and operably spaced from each other; and

a radio frequency (RF) applicator with a conductor electrically coupled with the first anode element and another conductor electrically coupled with the first cathode element and operable to selectively energize the first anode element and the first cathode element in a radio frequency spectrum;

wherein the energization of the first anode element and first cathode element induces energization between the first anode element and the second anode element, between the first cathode element and the second cathode element, and between the second anode element and the second cathode element to generate a field of electromagnetic radiation in the radio frequency spectrum between the second anode element and the second cathode element, operable to dielectrically heat liquid within the article.

12. The article treatment appliance of claim 11 comprising a bed, with the article supported on an upper surface of the bed.

13. The article treatment appliance of claim 11 comprising a drum with inner and outer surfaces, and the article is supported on the inner surface.

14. The article treatment appliance of claim 13 wherein the drum is operably rotatable about a rotational axis.

15. The article treatment appliance of claim 14 wherein the first anode element comprises an anode ring encircling a first radial segment of the drum, and the first cathode element comprises a cathode ring encircling a second radial segment of the drum, which is different from the first radial segment.

16. The article treatment appliance of claim 15 wherein the first and second radial segments are axially spaced from each other.

17. The article treatment appliance of claim 15 wherein the second anode element comprises a first comb element having a first base from which extend a first plurality of teeth, the second cathode element comprises a second comb element having a second base from which extend a second plurality of teeth, with first and second plurality of teeth are interdigitally arranged, and the first base is axially aligned with the first radial segment and the second base is axially aligned with the second radial segment.

18. The article treatment appliance of claim 11, further comprising a drum, and wherein at least one of the second anode element and the second cathode element are encapsulated by the drum.

19. The article treatment appliance of claim 11, further comprising a drum, and wherein the non-conductive material comprises at least a layer of insulating material of the drum.

20. The article treatment appliance of claim 11 wherein the second anode element comprises a first comb element having a first base from which extend a first plurality of teeth, the second cathode element comprises a second comb element having a second base from which extend a second plurality of teeth, with first and second plurality of teeth are interdigitally arranged.