Induction heat cooking apparatus

Patent metadata

Field	Value
Publication number	US-10667332-B2
Application number	US-201615189395-A
Country	US
Kind code	B2
Filing date	Jun 22, 2016
Priority date	Jun 22, 2015
Publication date	May 26, 2020
Grant date	May 26, 2020

Abstract

An electronic induction heat cooking apparatus includes first and second cooker modules including at least one heating coil and a dual heating coil, the first cooker module includes any one of an inner coil and an outer coil included in the dual heating coil, switching elements for operating the coil and a first microcontroller unit for controlling the switching elements, the second cooker module includes the other of the inner coil and the outer coil included in the dual heating coil, switching elements for operating the other coil and a second microcontroller unit for controlling the switching elements, and the first microcontroller unit and the second microcontroller unit share an oscillator.

First claim

What is claimed is:

1. An electronic induction heat cooking apparatus comprising:
a first cooker module and a second cooker module that include at least one heating coil and a dual heating coil, the dual heating coil including an inner coil and an outer coil,
wherein the first cooker module includes:
the inner coil of the dual heating coil,
a plurality of switching elements configured to operate the inner coil, and
a first microcontroller unit insulated from the plurality of switching elements and configured to control the plurality of switching elements,

wherein the second cooker module includes:
the outer coil of the dual heating coil,
a plurality of switching elements configured to operate the outer coil of the dual heating coil, and
a second microcontroller unit insulated from the plurality of switching elements of the second cooker module and configured to control the plurality of switching elements of the second cooker module,

wherein the first microcontroller unit and the second microcontroller unit are connected to a same ground,
wherein each of the plurality of switching elements of the first cooker module and each of the plurality of switching elements of the second cooker module are connected to different grounds,
wherein the first microcontroller unit and the second microcontroller unit share an oscillator,
wherein the first microcontroller unit and the second microcontroller unit share an oscillator frequency and are configured to control the inner coil and the outer coil to operate with a same operation frequency,
wherein the plurality of switching elements of the second cooker module include:
first, second, third, and fourth switching elements connected to one another in series between a positive terminal of a rectifier and a negative terminal of the rectifier, wherein the second cooker module further includes:
a first heating coil having one end connected to a contact point between the first switching element and the second switching element, and another end connected between a first resonance capacitor connected to one end of the rectifier and a second resonance capacitor connected to another end of the rectifier, and
a second heating coil having one end connected to a contact point between the second switching element and the third switching element, and another end connected to a third resonance capacitor connected to the one end of the rectifier and a fourth resonance capacitor connected to the another end of the rectifier,

wherein the outer coil of the dual heating coil has one end connected to a contact point between the third switching element and the fourth switching element, and another end connected between a fifth resonance capacitor connected to the one end of the rectifier and a sixth resonance capacitor connected to the another end of the rectifier,
wherein one end of the first switching element is connected to the positive terminal of the rectifier, and another end of the first switching element is connected to the second switching element,
wherein one end of the second switching element is connected to the first switching element, and another end of the second switching element is connected to the third switching element,
wherein one end of the third switching element is connected to the second switching element, and another end of the third switching element is connected to the fourth switching element, and
wherein one end of the fourth switching element is connected the third switching element, and another end of the fourth switching element is connected to the negative terminal of the rectifier.

2. The electronic induction heat cooking apparatus according to claim 1 , wherein a three-phase voltage is applied to the first cooker module and the second cooker module.

3. The electronic induction heat cooking apparatus according to claim 2 , wherein an A-phase voltage of the three-phase voltage is applied to the first cooker module and a B-phase voltage of the three-phase voltage is applied to the second cooker module.

4. The electronic induction heat cooking apparatus according to claim 1 , wherein the first microcontroller unit and the second microcontroller unit are configured to remove a frequency error of the oscillator to thereby control the inner coil and the outer coil to operate with the same operation frequency.

Assignees

• Lg Electronics Inc

Inventors

• Oh Dooyong
• Yu Oksun
• Ok Seungbok
• Park Byeongwook

Classifications

• H05B6/1272

  with more than one coil or coil segment per heating zone · CPC title

• H05B2206/022

  Special supports for the induction coils · CPC title

• H05B6/065 Primary

  using coordinated control of multiple induction coils · CPC title

• Y02B40/126

  Cross-Sectional Technologies · mapped topic

• 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