Induction heating cooker and kitchen unit having the same

• US 8,878,108 B2
• Filed: 03/05/2010
• Issued: 11/04/2014
• Est. Priority Date: 03/13/2009
• Status: Expired due to Fees

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Kitaizumi, Takeshi, Ishimaru, Naoaki, Kurose, Yoichi, Sadahira, Masafumi, Shimizu, Yuichi, Haji, Masayo
• Primary Examiner(s): Ross, Dana
• Assistant Examiner(s): Bae, Gyounghyun
• Application Number:
  US13/002,114
• Publication Number:
  US 20110100980A1
• Time in Patent Office: 1,705 Days
• Field of Search: 219/601, 219/622, 219624-627, 219/661, 219/663, 219665-667, 219/672, 219/647, 219/649, 219/650, 126220-221
• US Class Current: 219/624
• CPC Class Codes: H05B 2206/022 Special supports for the induction coils
• CPC Class Codes: H05B 6/1245 with special coil arrangements
• CPC Class Codes: H05B 6/1254 using conductive pieces to direct the induced magnetic field
• CPC Class Codes: Y02B 40/00 Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

An induction heating cooker in which a size of heating coils can be freely set without being restricted by a size of an opening of a cabinet of a kitchen unit. The induction heating cooker has an outer casing including a flange extending in an outward direction from a top portion of a container receptacle, with a heating coil container space being provided between the flange and a plate, such that one portion of each of the heating coils is disposed in the heating coil container space.

Claims

1. An induction heating cooker, comprising:

an outer casing for the induction heating cooker;

a plate for covering a top portion of the outer casing;

a heating coil for inductively heating a heating-target object placed on the plate; and

an inverter device for supplying the heating coil with a high frequency current, wherein the outer casing has;

a container receptacle that forms a container portion containing the inverter device, and that is inserted into an opening formed at a top board; and

a flange that is formed to extend in an outward direction from a top portion of the container receptacle, and that is placed on the top board surrounding the opening, and wherein

a heating coil container space for containing one portion of the heating coil is formed above the top board between the flange and the plate, and the one portion of the heating coil is disposed in the heating coil container space.

2. The induction heating cooker according to claim 1, further comprising

a metal plate comprising a non-magnetic material having heat conductivity disposed between the flange and the one portion of the heating coil, wherein one portion of the metal plate has a surface exposed in the container portion.

3. The induction heating cooker according to claim 2, wherein

the induction heating cooker includes a plurality of heating coils, each of which is identical with the heating coil, disposed on a single piece of the metal plate.

4. The induction heating cooker according to claim 1, wherein

the heating coil has a winding for generating a high frequency magnetic field induced by the high frequency current, and

both end portions of the winding are disposed in the container portion.

5. The induction heating cooker according to claim 1, further comprising:

a temperature detection device that detects a temperature of the heating-target object, wherein

the temperature detection device is disposed at a center portion of the heating coil and in the container portion.

6. The induction heating cooker according to claim 1, wherein

the heating coil has:

a winding for generating a high frequency magnetic field induced by the high frequency current;

a support plate for supporting the winding; and

a magnetic field shielding magnetic material disposed below the winding, for collecting the high frequency magnetic field generated by the winding, wherein

the support plate has a concave portion for containing the magnetic field shielding magnetic material, and containment of the magnetic field shielding magnetic material in the concave portion yields a total height dimension for the support plate and the magnetic field shielding magnetic material smaller than a total thickness for the support plate and the magnetic field shielding magnetic material.

7. The induction heating cooker according to claim 1, wherein

the heating coil has:

a winding for generating a high frequency magnetic field induced by the high frequency current; and

a plurality of magnetic field shielding magnetic materials disposed below the winding, for collecting the high frequency magnetic field generated by the winding, wherein

the plurality of magnetic field shielding magnetic materials is disposed such that at least one of the plurality of magnetic field shielding magnetic materials is disposed in each of the heating coil container space and the container portion, and

the magnetic field shielding magnetic material disposed in the heating coil container space is smaller in thickness than the magnetic field shielding magnetic material disposed in the container portion.

8. The induction heating cooker according to claim 7, wherein

the magnetic field shielding magnetic material disposed in the heating coil container space and the magnetic field shielding magnetic material disposed in the container portion are substantially identical in volume to each other.

9. The induction heating cooker according to claim 7, wherein

the magnetic field shielding magnetic material disposed in the heating coil container space is greater in quantity than the magnetic field shielding magnetic material disposed in the container portion.

10. The induction heating cooker according to claim 7, wherein

the magnetic field shielding magnetic material disposed in the heating coil container space is longer in lateral width than the magnetic field shielding magnetic material disposed in the container portion.

11. The induction heating cooker according to claim 7, wherein

the magnetic field shielding magnetic material disposed in the heating coil container space and the magnetic field shielding magnetic material disposed in the container portion are disposed such that respective top surfaces of each are substantially level with each other.

12. The induction heating cooker according to claim 7, further comprising

a metal plate being a non-magnetic material having heat conductivity disposed between the flange and the one portion of the heating coil, wherein

the magnetic field shielding magnetic material disposed in the heating coil container space is disposed on the metal plate.

13. A kitchen unit, comprising:

a cabinet;

an outer casing that is inserted into the cabinet;

a plate for covering a top portion of the outer casing;

a heating coil for inductively heating a heating-target object placed on the plate; and

an inverter device for supplying the heating coil with a high frequency current, wherein the outer casing has;

a container receptacle that forms a container portion containing the inverter device, and that is inserted into an opening formed at a top board of the cabinet; and

a flange that is formed to extend in an outward direction from a top portion of the container receptacle, and that is placed on the top board surrounding the opening, and wherein

a heating coil container space for containing one portion of the heating coil is formed above the top board between the flange and the plate, and the one portion of the heating coil is disposed in the heating coil container space.