System and Method for Adjusting Power of Inverter of Microwave Oven, and Microwave Oven

Patent metadata

Field	Value
Publication number	US-2016183331-A1
Application number	US-201514972910-A
Country	US
Kind code	A1
Filing date	Dec 17, 2015
Priority date	Dec 17, 2014
Publication date	Jun 23, 2016
Grant date	—

Abstract

A system and a method for adjusting a power of an inverter of a microwave oven, and a microwave oven are provided. The system ( 100 ) includes: a storage module ( 101 ), configured to store an index table comprising periodic counting values and identification numbers; a control module ( 102 ), configured to look up an identification number corresponding to a power request signal in the index table according to the power request signal, to look up a periodic counting value corresponding to the identification number in the index table, and to output a frequency signal according to the periodic counting value; and a communication module ( 104 ), configured to output a power control signal to the inverter ( 106 ) of the microwave oven according to the frequency signal. The inverter ( 106 ) outputs a power to a magnetron ( 108 ) of the microwave oven according to the power control signal.

First claim

What is claimed is:

1 . A system for adjusting a power of an inverter of a microwave oven, comprising:
a storage module, configured to store an index table comprising periodic counting values and identification numbers; a control module, configured to look up an identification number corresponding to a power request signal in the index table according to the power request signal, to look up a periodic counting value corresponding to the identification number in the index table, and to output a frequency signal according to the periodic counting value; and a communication module, configured to output a power control signal to the inverter of the microwave oven according to the frequency signal, wherein the inverter of the microwave oven outputs a power to a magnetron of the microwave oven according to the power control signal.

2 . The system according to claim 1 , wherein the control module is a PWM control module.

3 . The system according to claim 1 , wherein the communication module comprises:
a transistor, having an emitter connected with a DC power source; a first resistor, having one terminal connected with an input/output port of the communication module and the other terminal connected with a base of the transistor; a second resistor, having one terminal connected with the other terminal of the first resistor and the base of the transistor and the other terminal connected with the emitter of the transistor and the DC power source; a third resistor, having one terminal connected with a collector of the transistor and the other terminal connected with a power source port of the invertor; and a fourth resistor, having one terminal connected with the other terminal of the third resistor and the power source port of the inverter and the other terminal grounded.

4 . The system according to claim 2 , wherein the communication module comprises:
a transistor, having an emitter connected with a DC power source; a first resistor, having one terminal connected with an input/output port of the communication module and the other terminal connected with a base of the transistor; a second resistor, having one terminal connected with the other terminal of the first resistor and the base of the transistor and the other terminal connected with the emitter of the transistor and the DC power source; a third resistor, having one terminal connected with a collector of the transistor and the other terminal connected with a power source port of the invertor; and a fourth resistor, having one terminal connected with the other terminal of the third resistor and the power source port of the inverter and the other terminal grounded.

5 . The system according to claim 1 , wherein the index table comprises a plurality of identification numbers and a plurality of periodic counting values, there is a one-to-one relationship between the plurality of periodic counting values and the plurality of identification numbers, and the plurality of identification numbers form an arithmetic progression.

6 . The system according to claim 2 , wherein the index table comprises a plurality of identification numbers and a plurality of periodic counting values, there is a one-to-one relationship between the plurality of periodic counting values and the plurality of identification numbers, and the plurality of identification numbers form an arithmetic progression.

7 . The system according to claim 3 , wherein the index table comprises a plurality of identification numbers and a plurality of periodic counting values, there is a one-to-one relationship between the plurality of periodic counting values and the plurality of identification numbers, and the plurality of identification numbers form an arithmetic progression.

8 . The system according to claim 5 , wherein identification numbers corresponding to theoretic periodic counting values are ranged between a first identification number and a last identification number of the plurality of identification numbers.

9 . A method for adjusting a power of an inverter of a microwave oven, comprising:
looking up an identification number corresponding to a power request signal in a pre-stored index table according to the power request signal, the index table comprising periodic counting values and identification numbers; looking up a periodic counting value corresponding to the identification number in the index table; outputting a frequency signal according to the periodic counting value; outputting a power control signal to the inverter of the microwave oven according to the frequency signal; and outputting a power by the inverter of the microwave to a magnetron of the microwave oven according to the power control signal.

10 . The method according to claim 9 , wherein the index table comprises a plurality of identification numbers and a plurality of periodic counting values, there is a one-to-one relationship between the plurality of periodic counting values and the plurality of identification numbers, and the plurality of identification numbers form an arithmetic progression.

11 . The method according to claim 10 , wherein identification numbers corresponding to theoretic periodic counting values are ranged between a first identification number and a last identification number of the plurality of identification numbers.

12 . A microwave oven, comprising:
a storage module, configured to store an index table comprising periodic counting values and identification numbers; a control module, configured to look up an identification number corresponding to a power request signal in the index table according to the power request signal, to look up a periodic counting value corresponding to the identification number in the index table, and to output a frequency signal according to the periodic counting value; and a communication module, configured to output a power control signal according to the frequency signal; an inverter, configured to output a power to a magnetron according to the power control signal; and the magnetron, configured to work with the power outputted by the inverter.

13 . The microwave oven according to claim 12 , wherein the control module is a PWM control module.

14 . The microwave oven according to claim 12 , wherein the communication module comprises:
a transistor, having an emitter connected with a DC power source; a first resistor, having one terminal connected with an input/output port of the communication module and the other terminal connected with a base of the transistor; a second resistor, having one terminal connected with the other terminal of the first resistor and the base of the transistor and the other terminal connected with the emitter of the transistor and the DC power source; a third resistor, having one terminal connected with a collector of the transistor and the other terminal connected with a power source port of the invertor; and a fourth resistor, having one terminal connected with the other terminal of the third resistor and the power source port of the inverter and the other terminal grounded.

15 . The microwave oven according to claim 13 , wherein the communication module comprises:
a transistor, having an emitter connected with a DC power source; a first resistor, having one terminal connected with an input/output port of the communication module and the other terminal connected with a base of the transistor; a second resistor, having one terminal connected with the other terminal of the first resistor and the base of the transistor and the other terminal connected with the emitter of the transistor and the DC po

Assignees

• Midea Group Co Ltd

Inventors

• Lin Yue-Yue

Classifications

• H05B6/687 Primary

  for cooking · CPC title

• H05B6/681 Primary

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

• H05B6/664

  Aspects related to the power supply of the microwave heating apparatus · CPC title

• H05B6/682 Primary

  wherein the switching control is based on measurements of electrical values of the circuit · CPC title

• H05B6/6447

  Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors · CPC title