Microwave heating device

Patent metadata

Field	Value
Publication number	US-9609698-B2
Application number	US-201214366643-A
Country	US
Kind code	B2
Filing date	Oct 12, 2012
Priority date	Dec 20, 2011
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

A microwave heating device mountable to an electric device, includes: a commercial power supply; an AC/DC converter which outputs a plurality of DC voltages according to power supplied from the commercial power supply; a controller which receives power from the AC/DC converter and totally controls the electric device; a microwave processing device using a compound semiconductor which receives a plurality of outputs of the AC/DC converter and outputs a microwave; and a plurality of loads connected between, of the DC voltages output from the AC/DC converter, a predetermined Vd voltage and ground through a plurality of contacts. The loads form a group of electric components in the electric device. The controller controls power supply to the loads, and controls on/off of the contacts to drive the loads by the Vd voltage regardless of the voltage of the commercial power supply.

First claim

The invention claimed is:

1. A microwave heating device mountable to an electric device, the microwave heating device comprising:
a commercial power supply;
an AC/DC converter which outputs a plurality of DC voltages according to power supplied from the commercial power supply;
a controller which receives power from the AC/DC converter and totally controls the electric device;
a microwave processing device using a compound semiconductor which receives a plurality of outputs of the AC/DC converter and outputs a microwave; and
a plurality of loads connected between a predetermined Vd voltage of the DC voltages output from the AC/DC converter and a ground connection through a plurality of contacts,
wherein the loads comprise a group of electric components in the electric device, and
wherein the controller controls a power supply to the loads, and controls an on/off state of the contacts to drive the loads by the Vd voltage regardless of the voltage of the commercial power supply.

2. The microwave heating device according to claim 1 , wherein the AC/DC converter has a power factor correction function.

3. The microwave heating device according to claim 1 , wherein the contacts are disposed in series with the loads and comprise contacts of different relays, respectively, and wherein the controller is driven by a predetermined Vc voltage of the DC voltages output from the AC/DC converter, and selectively drives the contacts of the relays so as to open or close the contacts.

4. The microwave heating device according to claim 1 , further comprising:
a safety device comprising:
a fuse which prevents microwave leakage when a door in the electric device is open;
a normally open type microswitch interlocking with the opening and closing of the door; and
a normally closed type microswitch interlocking with the opening and closing of the door,
wherein the safety device is on a preceding stage of the AC/DC converter.

Assignees

• Panasonic Corp
• Panasonic Ip Man Co Ltd

Inventors

• Mihara Makoto
• Nobue Tomotaka
• Omori Yoshiharu
• Okajima Toshiyuki

Classifications

• Y02B40/143

  Cross-Sectional Technologies · mapped topic

• H05B6/66 Primary

  Circuits · CPC title

• H05B6/666

  Safety circuits (emergency protective circuits in general H02H) · CPC title

• H05B6/80

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

• H05B6/68 Primary

  for monitoring or control · CPC title