Electromagnetic wave generating system and heating device with electromagnetic wave generating system

Patent metadata

Field	Value
Publication number	US-12193133-B2
Application number	US-201917420463-A
Country	US
Kind code	B2
Filing date	Dec 11, 2019
Priority date	Jan 4, 2019
Publication date	Jan 7, 2025
Grant date	Jan 7, 2025

Abstract

Disclosed are an electromagnetic wave generating system and a heating device. The electromagnetic wave generating system includes an electromagnetic generating module, a radiating assembly and a matching unit connected in series between the electromagnetic generating module and the radiating assembly. The electromagnetic generating module is configured to generate an electromagnetic wave signal. The radiating assembly includes one or more radiating units and is configured to be electrically connected with the electromagnetic generating module to generate electromagnetic waves of a corresponding frequency according to the electromagnetic wave signal. The matching unit includes a first matching module. The first matching module includes a plurality of fixed value inductors connected in series between the electromagnetic generating module and the radiating assembly, and a plurality of parallel branches, wherein each parallel branch of the first matching module includes a fixed value capacitor and a switch connected in series. The input ends of the plurality of parallel branches of the first matching module are respectively connected in series between two adjacent inductors and between an end inductor and the radiating assembly, and the output ends thereof are all configured to be grounded, so as to match a load more accurately after receiving an adjusting command.

First claim

The invention claimed is:

1. An electromagnetic wave generating system, comprising:
an electromagnetic generating module, configured to generate an electromagnetic wave signal;
a radiating assembly, comprising one or more radiating units and configured to be electrically connected with the electromagnetic generating module to generate electromagnetic waves of a corresponding frequency according to the electromagnetic wave signal; and
a matching unit, connected in series between the electromagnetic generating module and the radiating assembly, and configured to adjust a load impedance of the electromagnetic generating module;
the matching unit comprising:
a first matching module, comprising a plurality of fixed value inductors connected in series between the electromagnetic generating module and the radiating assembly, and a plurality of branches, wherein
each branch of the first matching module comprises a fixed value capacitor and a switch connected in series; and
input ends of the plurality of branches of the first matching module are connected in series between every two adjacent inductors of the plurality of fixed value inductors and between an end inductor and the radiating assembly respectively, and output ends of the plurality of branches of the first matching module are all grounded, wherein the matching unit further comprises:
a second matching module, the second matching module connected in series between the electromagnetic generating module and the first matching module; and
the second matching module comprising a plurality of parallel branches.

2. The electromagnetic wave generating system according to claim 1 , wherein
a plurality of switches of the first matching module are integrated into an array type switch assembly.

3. The electromagnetic wave generating system according to claim 1 , wherein
each parallel branch of the second matching module comprises a fixed value capacitor and a switch connected in series.

4. The electromagnetic wave generating system according to claim 3 , wherein
a plurality of switches of the second matching module are integrated into an array type switch assembly.

5. The electromagnetic wave generating system according to claim 1 , further comprising:
a detection unit, connected in series between the matching unit and the electromagnetic generating module, and configured to detect specific parameters of an incident wave signal and a reflected wave signal passing through the detection unit; and
a control unit, configured to calculate an electromagnetic wave absorption rate according to the specific parameters, and send an adjusting command to the matching unit according to the electromagnetic wave absorption rate.

6. A heating device, comprising:
a container body, provided with a pick-and-place opening;
a door body, disposed at the pick-and-place opening and configured to open and close the pick-and-place opening; and
an electromagnetic wave generating system according to claim 1 , at least a part of which is disposed in the container body or accessed into the container body, so as to generate electromagnetic waves in the container body to heat an object to be processed.

7. The heating device according to claim 6 , wherein
the matching unit is disposed in the container body; and the heating device further comprises:
a housing, configured to separate an inner space of the container body into a heating chamber and an electrical appliance chamber, wherein the object to be processed and the matching unit are respectively disposed in the heating chamber and the electrical appliance chamber.

8. The heating device according to claim 7 , wherein
the container body and the housing are provided with heat dissipation holes in positions corresponding to the matching unit.

9. The heating device according to claim 7 , wherein:
the electromagnetic wave generating system, further comprises:
a detection unit, connected in series between the matching unit and the electromagnetic generating module, and configured to detect specific parameters of an incident wave signal and a reflected wave signal passing through the detection unit: and
a control unit, configured to calculate an electromagnetic wave absorption rate according to the specific parameters, and send an adjusting command to the matching unit according to the electromagnetic wave absorption rate;

the detection unit, the control unit and the matching unit are integrated on a circuit board; and
the container body is made of a metal and is configured to be grounded, and the circuit board is configured to be conductively connected with the container body.

Assignees

• Haier Smart Home Co Ltd

Inventors

• Zhang Lixiao
• Wang Haijuan
• Li Peng
• Zhu Xiaobing

Classifications

• H05B6/72 Primary

  Radiators or antennas · CPC title

• H05B6/688 Primary

  for thawing · CPC title

• Y02B40/00

  Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers · CPC title

• H05B6/52

  Feed lines · CPC title

• H05B6/50

  for monitoring or control · CPC title