COOK TOP COMPRISING AT LEAST TWO HEATING ELEMENTS AND A POWER ELECTRONICS ARRANGEMENT

• US 20120205365A1
• Filed: 10/19/2010
• Published: 08/16/2012
• Est. Priority Date: 10/26/2009
• Status: Active Grant

• Current Assignee: BSH Hausgeraete GmbH (Robert Bosch GmbH)
• Original Assignee: BSH Bosch und Siemens Hausgerã¤Te GmbH (Robert Bosch GmbH)
• Inventors: Anton Falcon, Daniel, Artigas Maestre, Jose Ignacio, Barragan Perez, Luis Angel, Bernal Ruiz, Carlos, Burdio Pinilla, José Miguel, Carretero Chamarro, Claudio, Garcia Jimenez, Jose-Ramon, Hernandez Blasco, Pablo Jesus, Llorente Gil, Sergio, Lucia Gil, Oscar, Millan Serrano, Ignacio, Monterde Aznar, Fernando, Navarro Tabernero, Denis, Puyal Puente, Diego, De la Cuerda Ortin, Jose Maria, Jimenez Navascues, Oscar, Mediano Heredia, Arturo, Moros Sanz, Daniel, Paricio Azcona, Jose Joaquin, Urriza Parroque, Isidro
• Granted Patent: US 10,925,122 B2
• Time in Patent Office: Days
• US Class Current: 219/620
• CPC Class Codes: H05B 6/065 using coordinated control of multiple induction coils

Abstract

A cook top with at least two heating elements includes a power electronics arrangement connected to a domestic single phase AC supply. The power electronics arrangement includes several power supply units, which each supply heating currents to one or more heating elements, and a switch arrangement with several electromechanical relays for connecting/disconnecting the power supply units to/from the heating elements. Output poles of at least two electromechanical relays associated with different power supply units are connected in parallel, wherein the parallel connection is permanently connected to at least one of the heating elements. This arrangement reduces the number of switching processes required for alternating use of a power supply device with several heating elements, and simplifies compliance with electromagnetic compatibility standards.

Claims

1-11. -11. (canceled)

12. A cook top, comprising:

at least two heating elements,

a power electronics arrangement having an input connected to a single phase of a domestic AC supply, said power electronics arrangement comprising a plurality of power supply units, each power supply unit supplying one or more of the at least two heating elements with heating currents, and

a switch arrangement comprising a plurality of electromechanical relays for connecting the power supply units to and/or disconnecting the power supply units from the heating elements,

wherein output poles of at least two electromechanical relays associated with different power supply units are connected in parallel, said parallel connection permanently connected to at least one of the heating elements.

13. The cook top of claim 12, wherein the heating elements are inductors and each of the plurality of power supply units comprises an inverter.

14. The cook top of claim 12, wherein the sum of nominal power rating of the heating elements in greater than a nominal power rating of the power electronics arrangement.

15. The cook top of claim 12, wherein in an unenergized state of the at least two relays, exactly one of the at least two relays connects the heating element to one of the power supply units, while others of the at least two relays disconnect the heating element from other power supply units.

16. The cook top of claim 12, wherein output poles of at least two of the electromechanical relays are connected in parallel, and wherein each of the heating elements is permanently connected to the parallel-connected output poles.

17. The cook top of claim 12, wherein at least one of the heating elements is connected to one of at least two output poles of a single electromechanical relay.

18. The cook top of claim 12, wherein the power electronics arrangement comprises a low-pass filter and a rectifier which are shared by all power supply units.

19. The cook top of claim 12, wherein the at least two electromechanical relays are single-pole double-throw switches.

20. The cook top of claim 19, wherein a single-pole double-throw switch has a common central terminal connected to a power supply unit and two output poles, with each output pole connected to a different heating element.

21. The cook top of claim 12, wherein the switch arrangement comprises a plurality of series-connected relays, with the series connection connected between a power supply unit and a heating element.

22. The cook top of claim 21, wherein a number of series-connected relays disposed between at least one first heating element and a power supply unit is different from a number of series-connected relays disposed between at least one second heating element and a power supply unit.