Induction cooking hob

Patent metadata

Field	Value
Publication number	US-2016338153-A1
Application number	US-201615153901-A
Country	US
Kind code	A1
Filing date	May 13, 2016
Priority date	May 14, 2015
Publication date	Nov 17, 2016
Grant date	—

Abstract

An induction cooking heater including an inductor having a number of magnetic field concentration bars located beneath the inductor. The inductor having the magnetic field concentration bars is supported by a polymeric frame. The polymeric frame includes a first support element on which the inductor is wound and a second support element that supports the magnetic field concentration bars. The first support element and the second support element are assembled together through a central ring-shaped zone having a snap engagement. The inductor is wound on an upper surface of the first support element opposite to the second support element.

First claim

What is claimed is:

1 . An induction cooking heater comprising an inductor having a number of magnetic field concentration bars located beneath the inductor wherein the inductor having the number of magnetic field concentration bars is supported by a polymeric frame, wherein the polymeric frame comprises a first support element on which the inductor is wound and a second support element that supports the number of magnetic field concentration bars, wherein the first support element and the second support element are assembled together through a central ring-shaped zone having a snap engagement, wherein the inductor is wound on an upper surface of the first support element opposite to the second support element.

2 . The induction cooking heater according to claim 1 , wherein a dimension of the second support element is lower than the dimension of the first support element.

3 . The induction cooking heater according to claim 2 , wherein the second support element presents a plurality of seats for the number of magnetic field concentration bars, each seat having a radial end far from the central zone open so that the seat may contain the number of magnetic field concentration bars which are longer than the plurality of seats.

4 . The induction cooking heater according to claim 1 , wherein an intermediate zone of the second support element comprises a seat for a group of curved field concentration bars.

5 . The induction cooking heater according to claim 4 , wherein the group of curved field concentration bars comprise a plurality of flat ferrite elements having a circular sector shape.

6 . The induction cooking heater according claim 1 , wherein the first element comprises a plurality of arms stemming out from a central zone that are joined at an intermediate ring.

7 . The induction cooking heater according to claim 6 , wherein the intermediate ring divides the first support element into two zones, a central zone with a number of first radial arms and a second zone with a number of cantilevered second radial arms.

8 . The induction cooking heater according to claim 7 , wherein the number of first arms are identical to the number of second arms and the first arms and the second arms are angularly shifted relative to each other.

9 . The induction cooking heater according to claim 7 , wherein the number of first arms is lower than the number of the second arms.

10 . The induction cooking heater according to claim 1 , wherein the first support element comprises a first polymeric material and the second support element comprises a different second polymeric material.

11 . An induction cooking heater comprising an inductor having a number of magnetic field concentration bars located beneath the inductor wherein the inductor having the number of magnetic field concentration bars is supported by a polymeric frame, wherein the polymeric frame comprises a first support element on which the inductor is wound and a second support element that supports the number of magnetic field concentration bars, wherein the first support element and the second support element are assembled together through an annular zone having a snap engagement, wherein the inductor is wound on an upper surface of the first support element opposite to the second support element, wherein the first element presents a plurality of arms stemming out from a central zone that are joined at an intermediate ring.

12 . The induction cooking heater according to claim 11 , wherein the second support element presents a plurality of seats for the number of magnetic field concentration bars, each seat having a radial end far from the central zone open so that the seat may contain the number of magnetic field concentration bars which are longer than the plurality of seats.

13 . The induction cooking heater according to claim 11 , wherein an intermediate zone of the second support element comprises a seat for a group of curved field concentration bars.

14 . The induction cooking heater according to claim 13 , wherein the group of curved field concentration bars comprise a plurality of flat ferrite elements having a circular sector shape.

15 . The induction cooking heater according to claim 14 , wherein the intermediate ring divides the first support element into two zones, a central zone with a number of first radial arms and a second zone with a number of cantilevered second radial arms.

16 . The induction cooking heater according to claim 15 , wherein the number of first arms are identical to the number of second arms and the first arms and the second arms are angularly shifted relative to each other.

17 . The induction cooking heater according to claim 11 , wherein a dimension of the second support element is lower than the dimension of the first support element.

18 . A method for producing an induction cooking heater comprising at least one inductor and a group of magnetic field concentration bars located beneath the inductor, the inductor and the group of magnetic field concentration bars are supported by a polymeric frame comprising:
winding a wire on an upper surface of a first support element opposite to the group of magnetic field concentration bars; inserting the group of magnetic field concentration bars on a second support element; and assembling together the first support element and the second support element.

19 . The method according to claim 18 , wherein the first support element and the second support element are assembled by a snap-engagement in a central zone thereof.

20 . The method according to claim 18 , wherein the first element presents a plurality of arms stemming out from a central zone that are joined at an intermediate ring and the intermediate ring divides the first support element into two zones, a central zone with a number of first radial arms and a second zone with a number of cantilevered second radial arms.

Assignees

• Whirlpool Co

Inventors

• Chinazzo Fabiano

Classifications

• H05B1/0266

  Cooktops · CPC title

• H05B6/44 Primary

  having more than one coil or coil segment · CPC title

• H05B6/365

  using supplementary conductive or ferromagnetic pieces · CPC title

• H05B6/1254 Primary

  using conductive pieces to direct the induced magnetic field · CPC title

• H05B2206/022

  Special supports for the induction coils · CPC title