Induction heating device

Patent metadata

Field	Value
Publication number	US-2020196401-A1
Application number	US-201916706050-A
Country	US
Kind code	A1
Filing date	Dec 6, 2019
Priority date	Dec 18, 2018
Publication date	Jun 18, 2020
Grant date	—

Abstract

An induction heating device having a control box, a magnetic core provided with at least one inductor fed with a current by a power electronics that is controlled by a control circuit, the power electronics and the control circuit being disposed in the control box, a removeable closing yoke for completing the magnetic circuit of the magnetic core, and a plurality of temperature sensors. A plurality of metal articles are simultaneously heated so as to each reach a target temperature and according to a heating cycle during which the temperatures sensors monitor the temperatures of the plurality of the metal articles so that each metal article is connected to a temperature sensor that is not connected to any other metal article.

First claim

1 . An induction heating device comprising:
a control box, a magnetic core provided with at least one inductor fed with a current by a power electronics that is controlled by a control circuit, the power electronics and the control circuit being disposed in the control box, a removeable closing yoke for completing the magnetic circuit of the magnetic core, and a plurality of temperature sensors, wherein a plurality of metal articles are simultaneously heated so as to each reach a target temperature and according to a heating cycle during which the temperature sensors monitor the temperatures of the plurality of the metal articles so that each metal article is connected to a temperature sensor that is not connected to any other metal article.

2 . The induction heating device according to claim 1 , wherein there are as many temperature sensors as there are different articles to be heated simultaneously.

3 . The induction heating device according to claim 1 , wherein the magnetic core has a first arm, a second arm and a third arm, the arms forming an integral U or C shaped core section, and in that the closing yoke is positioned across the open arms of the U or C shaped core section to complete the magnetic circuit of the magnetic core.

4 . The induction heating device according to claim 3 , further comprises a single inductor installed on one of the arms of the U or C magnetic core.

5 . The induction heating device according to claim 3 , further comprises two inductors, one inductor being installed on one of the two open arms of the U or C shaped magnetic core, and the other inductor being installed on the other open arm.

6 . A method to heat up several metal articles with an induction heating device, the method comprising the following steps:
providing an induction heating device having: a control box, a magnetic core provided with at least one inductor fed with a current by a power electronics that is controlled by a control circuit, the power electronics and the control circuit being disposed in the control box, a removeable closing yoke for completing the magnetic circuit of the magnetic core, and a plurality of temperature sensors, wherein a plurality of metal articles are simultaneously heated so as to each reach a target temperature and according to a heating cycle during which the temperature sensors monitor the temperatures of the plurality of the metal articles so that each metal article is connected to a temperature sensor that is not connected to any other metal article, the method further comprising the steps of: a. placing the metal articles around one of the arms of the magnetic core or the closing yoke; b. connecting a unique temperature sensor to each metal article, c. setting for each temperature sensor the target temperature to be reached for each metal article; e. starting the heating cycle by a manual action consisting of pressing a button; f. heating up each of the several metal articles simultaneously.

7 . The method according to claim 6 , further comprising the following step:
d. setting a first temperature alarm value and a second temperature alarm value for each target temperature, the first temperature alarm being used to prevent an overheating of the associated metal article, and the second temperature alarm value being used to prevent an underheating of the associated metal article.

8 . The method according to claim 6 , wherein during step f) at least some of the metal articles placed in contact with each other, so as to ease the transfer of heat between them.

9 . The method according to claim 6 , wherein during step c), the target temperatures of all metal articles to be heated simultaneously are set to the same value.

10 . The method according to claim 6 , wherein during step c), the target temperatures of all metal articles to be heated simultaneously are set to different values.

Assignees

• Skf Ab

Inventors

• Caballero Alberto Javier Herrera
• Kammann Jens

Classifications

• Y02P10/25

  Process efficiency · CPC title

• H05B6/06 Primary

  Control, e.g. of temperature, of power · CPC title

• H05B6/10

  Induction heating apparatus, other than furnaces, for specific applications · CPC title

• H05B6/36

  Coil arrangements · CPC title

• H05B6/405 Primary

  for heating gear-wheels · CPC title