Laundry drying machine

Patent metadata

Field	Value
Publication number	US-12467194-B2
Application number	US-202117546747-A
Country	US
Kind code	B2
Filing date	Dec 9, 2021
Priority date	Dec 18, 2020
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

A laundry drying machine includes a cabinet, a drum that is rotatably disposed inside the cabinet and that defines an inner space configured to accommodate a subject to be dried, a driver configured to rotate the drum, a duct configured to supply air to the drum and to discharge the air from the drum, and an electrode part configured to form an electric field in the inner space of the drum to thereby heat the subject. The electrode part includes a probe configured to radiate an electromagnetic wave defining the electric field, where at least a portion of the probe is disposed in the inner space of the drum.

First claim

What is claimed is:

1 . A laundry drying machine, comprising:
a cabinet; a drum that is rotatably disposed inside the cabinet and that defines an inner space configured to accommodate a subject to be dried; a driver configured to rotate the drum; a duct configured to supply air to the drum and to discharge the air from the drum; and an electrode part configured to form an electric field in the inner space of the drum to thereby heat the subject, the electrode part comprising a probe configured to radiate an electromagnetic wave defining the electric field, wherein at least a portion of the probe is disposed in the inner space of the drum, and wherein the probe comprises:
a probe body that defines a probe space therein, wherein at least a portion of a first side of the probe body is closed, and
a plurality of electrode pins that are disposed at an inner circumferential surface of the probe body and spaced apart from one another by a predetermined angle along a circumferential direction of the probe body.

2 . The laundry drying machine according to claim 1 , wherein the probe has a cylindrical shape and is disposed along a central axis of the drum.

3 . The laundry drying machine according to claim 1 , wherein the drum defines a coupling hole that receives at least a portion of the electrode part,
wherein the electrode part further comprises:
an oscillator configured to generate the electromagnetic wave;
a probe housing that is coupled to an outer circumferential surface of the coupling hole; and
a connector configured to transmit the electromagnetic wave from the oscillator to the probe, the connector having a first side connected to the probe housing and a second side connected to the oscillator, and
wherein the probe is configured to receive the electromagnetic wave from the connector.

4 . The laundry drying machine according to claim 3 , wherein the oscillator is configured to output the electromagnetic wave having power that is less than or equal to 1 kW.

5 . The laundry drying machine according to claim 1 ,
wherein the plurality of electrode pins are disposed in the probe space of the probe body.

6 . The laundry drying machine according to claim 1 , wherein the probe body further defines a fixing hole at the first side of the probe body, and
wherein the plurality of electrode pins are respectively fixed to a plurality of grooves that are defined at the inner circumferential surface of the probe body.

7 . The laundry drying machine according to claim 1 , wherein the electrode part further comprises a probe cover that is disposed at a rear inner surface of the drum and has a cylindrical shape, the probe cover having a closed surface and an open surface that face each other.

8 . The laundry drying machine according to claim 7 , wherein the probe cover comprises a fixing pin that protrudes from a center of the closed surface toward the open surface,
wherein the probe body further defines a fixing hole at the first side of the probe body, the fixing hole receiving the fixing pin, and wherein the probe cover and the probe body are coaxially connected to each other by coupling of the fixing pin and the fixing hole.

9 . A laundry drying machine, comprising:
a cabinet; a drum that is rotatably disposed inside the cabinet and defines an inner space configured to accommodate a subject to be dried, the drum further defining a coupling hole; a driver configured to rotate the drum; a duct configured to supply air to the drum and to discharge the air from the drum; and an electrode part configured to form an electric field in the inner space of the drum to thereby heat the subject, the electrode part comprising:
an oscillator configured to generate an electromagnetic wave defining the electric field,
a probe disposed in the inner space of the drum through the coupling hole and configured to radiate the electromagnetic wave,
a probe housing connected to the coupling hole from an outside of the drum, and
a guide that defines a hollow waveguide configured to transmit the electromagnetic wave from the oscillator to the probe, the guide having a first side connected to the probe housing and a second side connected to the oscillator.

10 . The laundry drying machine according to claim 9 , wherein the oscillator is configured to output the electromagnetic wave having power that is greater than or equal to 1 kW and less than or equal to 2.5 kW.

11 . The laundry drying machine according to claim 9 , wherein the guide has a rectangular cross section and extends in one direction with respect to with respect to a rotation axis of the drum.

12 . The laundry drying machine according to claim 9 , wherein the guide extends in a left direction or a right direction with respect to a rotation axis of the drum.

13 . The laundry drying machine according to claim 9 , wherein the guide defines a connection hole at the first side of the guide, the connection hole having a circular shape.

14 . The laundry drying machine according to claim 13 , wherein the probe is disposed on an axis of the connection hole, and
wherein at least a portion of the probe is disposed in an inner space of the guide.

15 . The laundry drying machine according to claim 14 , wherein the probe has an incident surface that has a hemispherical shape protruding toward the connection hole.

16 . The laundry drying machine according to claim 9 , wherein the electrode part further comprises a probe support member that is disposed between the probe housing and the probe and fixes a position of the probe in the probe housing.

17 . The laundry drying machine according to claim 16 , wherein the probe support member comprises:
an inner ring coupled to an outer circumferential surface of the probe; an outer ring coupled to an inner circumferential surface of the probe housing; and a plurality of support ribs that connect the inner ring to the outer ring and are arranged at regular intervals along a circumferential direction of the inner ring or the outer ring.

18 . The laundry drying machine according to claim 9 , wherein the electrode part further comprises a plurality of probe support members that are disposed between the probe housing and the probe and fix a position of the probe in the probe housing, the plurality of probe support members being spaced apart from one another in an axial direction of the probe.

19 . The laundry drying machine according to claim 9 , wherein the oscillator is disposed at one side with respect to a rotational axis of the drum and spaced apart from the rotational axis of the drum by a predetermined distance.

20 . A laundry drying machine, comprising:
a cabinet; a drum that is rotatably disposed inside the cabinet and that defines an inner space configured to accommodate a subject to be dried; a driver configured to rotate the drum; a duct configured to supply air to the drum and to discharge the air from the drum; and an electrode part configured to form an electric field in the inner space of the drum to thereby heat the subject, the electrode part comprising a probe configured to radiate an electromagnetic wave defining the electric field, wherein at least a portion of the probe is disposed in the inner space of the drum, and wherein the probe comprises:
a probe body that defines a probe space therein, wherein at least a portion of a first side of the probe body is closed, and the probe body further defines a fixing hole at the first side of the probe body, and
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Assignees

• Lg Electronics Inc

Inventors

• Lee Junghoon
• Moon Chanwoo
• Kim Jihoon
• Kim Youngmin

Classifications

• D06F58/08

  Driving arrangements · CPC title

• H05B6/80

  Apparatus for specific applications (stoves or ranges F24C7/02) · CPC title

• H05B6/6467

  using detectors with R.F. transmitters · CPC title

• D06F58/04

  Details  (controlling or regulating devices D06F34/00) · CPC title

• D06F58/266 Primary

  Microwave heating equipment · CPC title