US 12,484,120 B2
Microwave treatment device
Yoshiharu Oomori, Shiga (JP); Daisuke Hosokawa, Shiga (JP); Koji Yoshino, Shiga (JP); Kazuki Maeda, Shiga (JP); Takashi Uno, Shiga (JP); Masayoshi Hiramoto, Tokyo (JP); and Fumitaka Ogasawara, Hyogo (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/608,209
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Jul. 28, 2020, PCT No. PCT/JP2020/028815
§ 371(c)(1), (2) Date Nov. 2, 2021,
PCT Pub. No. WO2021/020373, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 2019-140412 (JP), filed on Jul. 31, 2019.
Prior Publication US 2022/0210877 A1, Jun. 30, 2022
Int. Cl. H05B 6/68 (2006.01); H05B 6/64 (2006.01)
CPC H05B 6/686 (2013.01) [H05B 6/6447 (2013.01); H05B 6/687 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A microwave treatment device comprising:
a heating chamber configured to accommodate a heating target;
a microwave generator configured to generate a microwave with a frequency in a specified frequency band;
an amplifier configured to amplify the microwave generated by the microwave generator;
a feeding unit configured to supply the microwave amplified by the amplifier to the heating chamber;
a detector configured to detect a reflected microwave power returned through the feeding unit; and
a controller configured to control the microwave generator and the amplifier,
wherein the controller selects one of a plurality of frequencies in the specified frequency band and causes the microwave generator to generate the microwave with the selected frequency,
the controller causes the amplifier to change an output power of the microwave so that the microwave supplied to the heating chamber has one of a plurality of output powers,
the controller measures a reflected microwave frequency characteristic based on reflected microwave powers detected under each of a condition that the output power of the microwave is a first output power and a condition that the output power of the microwave is a second output power, where the first output power and the second output power are included in the plurality of output powers and the first output power is a lower power than the second output power, and
the controller determines an in-chamber loss frequency band based on a first reflected microwave frequency characteristic measured under the condition that the output power of the microwave is the first output power and a second reflected microwave frequency characteristic measured under the condition that the output power of the microwave is the second output power.