Microwave cooking apparatus, control method and storage medium

Patent metadata

Field	Value
Publication number	US-12588116-B2
Application number	US-202318168485-A
Country	US
Kind code	B2
Filing date	Feb 13, 2023
Priority date	Jan 31, 2018
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

The present disclosure provides a microwave cooking apparatus, a control method, and a storage medium. The microwave cooking apparatus comprises: a housing capable of enclosing a heating chamber therein; a solid microwave source disposed on the housing and used for emitting a first variable-power microwave; an antenna connected to the solid microwave source and used for feeding the first variable-power microwave into the heating chamber; and a controller connected to the solid microwave source and used for controlling the solid microwave source to operate and adjusting the first variable-power microwave. According to the technical solution of the present disclosure, on one hand, a better heating effect is able to be achieved for sealed foods, and on the other hand, a better unfreezing effect is also able to be achieved because the power of a solid microwave source is much lower than that of a magnetron so that during an unfreezing operation, foods to be defrosted will not be locally cooked resulting from local overheating caused when the foods to be defrosted locally absorbs too much heat due to excessive power.

First claim

The invention claimed is:

1 . A method for controlling a microwave cooking apparatus, comprising:
performing a heating operation by starting a group of power components, the group of power components configured to generate a first microwave with high power radiation and a second microwave with low power radiation, the first microwave having a first frequency range, and the second microwave having a second frequency range; and shielding the second microwave in the first frequency range by a band-stop antenna connected to the group of power component, the band-stop antenna including: an antenna configured to feed the second microwave; and a circulator connected to the antenna and configured to shield the second microwave in the first frequency range; wherein the group of power components includes a combination of the solid microwave source and a heating pipe.

2 . The method according to claim 1 , further comprising:
before the performing the heating operation, sending a fixed power detection signal into a heating chamber; receiving a reflection signal of the fixed power detection signal; determining whether the heating chamber is unloaded based on analyzing a magnitude of the reflection signal with a threshold value; generating an alarm signal when it is determined that the heating chamber is unloaded; and when it is determined that the heating chamber is loaded, performing the heating operation.

3 . The control method according to claim 1 , further comprising:
detecting a heating instruction for starting a single heating mode; determining a power component corresponding to the single heating mode; and performing a heating operation under the single heating mode by starting the power component; wherein the group of power components further includes one of a magnetron and a steam generator.

4 . A microwave cooking apparatus, comprising:
a cavity; a first microwave source fixedly disposed on a side wall of the cavity and configured to generate a first microwave with high power radiation, wherein the first microwave source adjusts a power of the first microwave with a first power adjustment accuracy; a second microwave source fixedly disposed on a side wall of the cavity and configured to generate a second microwave with low power radiation, wherein the second microwave source adjusts a power of the second microwave with a second power adjustment accuracy that is higher than the first power adjustment accuracy, the first microwave having a first frequency range and the second microwave having a second frequency range; and a band-stop antenna fixedly disposed on a side wall of the cavity and connected to the second microwave source, the band-stop antenna configured to shield the second microwave in the first frequency range, the band-stop antenna including: an antenna configured to feed the second microwave into the cavity; and a circulator connected to the antenna, and configured to shield the second microwave in the first frequency range; wherein the group of power components includes a combination of the solid microwave source and a heating pipe.

5 . The microwave cooking apparatus according to claim 4 , wherein a first power range of the first microwave has a first minimum power and a first maximum power, and a second power range of the second microwave has a second minimum power and a second maximum power, and the second maximum power is between the first minimum power and the first maximum power.

6 . The microwave cooking apparatus according to claim 4 , wherein the first frequency range of the first microwave does not overlap the second frequency range of the second microwave.

7 . The microwave cooking apparatus according to claim 4 , further comprising:
a waveguide fixedly disposed on a side wall of the cavity and connected to the first microwave source and configured to feed the first microwave into the cavity.

Assignees

• Guangdong Midea Kitchen Appliances Mfg Co Ltd
• Midea Group Co Ltd

Inventors

• Chen Likang
• Tang Xiangwei
• Wu Tianhong
• Deng Yang
• Chen Maoshun
• Chen Zonglong
• Fang Youping

Classifications

• H05B6/681

  Circuits comprising an inverter, a boost transformer and a magnetron · 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

• H05B2206/044

  Microwave heating devices provided with two or more magnetrons or microwave sources of other kind · CPC title

• H05B6/686 Primary

  Circuits comprising a signal generator and power amplifier, e.g. using solid state oscillators · CPC title

• H05B6/70 Primary

  Feed lines · CPC title