Cooking appliance

Abstract

A cooking appliance, in particular an induction oven appliance, includes a cavity having a wall, at least one induction heating element, and at least one electrically conductive screening element for screening an electric and/or magnetic field generated by the induction heating element. The induction heating element can be arranged on the wall of the cavity.

Claims

1. A cooking appliance, in particular an induction oven appliance, comprising: an induction heating element; a substantially plate-like electrically conductive screening element configured to screen an electrical and/or magnetic field generated by the induction heating element; and an electrical insulation element, wherein the induction heating element is located between the electrically conductive screening element and the electrical insulation element, and the cooking appliance is configured free of ferrites provided for conducting a magnetic field generated by the induction heating element.

2. The cooking appliance of claim 1, further comprising a cavity having a wall, said electrical insulation element being arranged on the wall of the cavity.

3. The cooking appliance of claim 1, further comprising a cavity having a wall, said screening element being arranged at least in part on a side of the induction heating element which side is remote from the wall of the cavity.

4. The cooking appliance of claim 1, wherein the screening element is made at least largely from aluminum and/or an aluminum alloy.

5. The cooking appliance of claim 1, further comprising a thermal insulation element arranged at least in part between the screening element and the induction heating element.

6. The cooking appliance of claim 5, wherein the thermal insulation element directly adjoins at least one of the screening element and the induction heating element.

7. The cooking appliance of claim 5, wherein the screening element is directly contacting the thermal insulation element, the thermal insulation element is directly contacting the induction heating element, and the induction heating element is directly contacting the electrical insulation element.

8. The cooking appliance of claim 1, further comprising a cavity having a wall, said induction heating element being spaced by at most 3 mm from the wall of the cavity.

9. The cooking appliance of claim 1, further comprising a cavity having a wall, said screening element being spaced from the wall of the cavity by at least 20 mm.

10. The cooking appliance of claim 1, further comprising a cavity having a wall, said induction heating element being configured to heat the wall of the cavity inductively.

11. The cooking appliance of claim 10, wherein in at least one operating condition, the induction heating element heats up the wall of the cavity to a temperature of at least 300° C.

12. The cooking appliance of claim 1, wherein the screening element is directly contacting the induction heating element, and the induction heating element is directly contacting the electrical insulation element.

13. A cooker, in particular an induction oven, comprising a cooking appliance, said cooking appliance comprising: a cooking cavity having a wall; an induction heating element; a substantially plate-like electrically conductive screening element configured to screen an electrical and/or magnetic field generated by the induction heating element; and an electrical insulation element which is arranged at least in part between the induction heating element and the wall of the cavity wherein the cooker is configured free of ferrites provided for conducting a magnetic field generated by the induction heating element.

14. The cooker of claim 13, wherein said screening element is arranged at least in part on a side of the induction heating element which side is remote from the wall of the cavity.

15. The cooker of claim 13, wherein the screening element is made at least largely from aluminum and/or an aluminum alloy.

16. The cooker of claim 13, wherein the cooking appliance includes a thermal insulation element arranged at least in part between the screening element and the induction heating element.

17. The cooker of claim 16, wherein the thermal insulation element directly adjoins at least one of the screening element and the induction heating element.

18. The cooker of claim 16, wherein the screening element is directly contacting the thermal insulation element, the thermal insulation element is directly contacting the induction heating element, and the induction heating element is directly contacting the electrical insulation element.

19. The cooker of claim 13, wherein said induction heating element is spaced by at most 3 mm from the wall of the cavity.

20. The cooker of claim 13, wherein said screening element is spaced from the wall of the cavity by at least 20 mm.

21. The cooker of claim 13, wherein said induction heating element is configured to heat the wall of the cavity inductively.

22. The cooker of claim 21, wherein in at least one operating condition, the induction heating element heats up the wall of the cavity to a temperature of at least 300° C.

Description

(1) Further advantages become apparent from the description of the drawing below. The drawing illustrates exemplary embodiments of the invention. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will also favorably consider the features individually and group them together to form useful further combinations.

BRIEF DESCRIPTION OF THE DRAWINGS

(2) In the drawing:

(3) FIG. 1 shows a schematic illustration of a cooker having a cooking appliance,

(4) FIG. 2 shows a schematic exploded illustration of a cavity, two electrical insulation elements, two induction heating elements, two thermal insulation elements and two screening elements of the cooking appliance, and

(5) FIG. 3 shows a schematic sectional illustration of an enlarged detail of FIG. 2, in an assembled condition.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS OF THE PRESENT INVENTION

(6) FIG. 1 shows a cooker 22 that takes the form of an induction cooker, having a cooking appliance 10 that takes the form of an induction cooking appliance. For example, the cooker 22 could take the form of a grill and/or a steam cooker and/or a microwave device. In the present exemplary embodiment, the cooker 22 takes the form of an induction oven. The cooking appliance 10 takes the form of an induction oven appliance.

(7) The cooking appliance 10 has a cavity 24. The cavity 24 partially delimits a cooking compartment 26. The cavity 24 delimits the cooking compartment 26 substantially together with a cooker door 28. The cooking appliance 10 has the cooker door 28.

(8) The cooking appliance 10 has five walls 12 for the cavity. Where a plurality of objects are present, in each case only one is provided with a reference numeral in the figures. The walls 12 of the cavity are part of the cavity 24. Together with the cooker door 28, the walls 12 of the cavity substantially define the cooking compartment 26.

(9) One of the walls 12 of the cavity takes the form of a cavity bottom wall 30. One of the walls 12 of the cavity takes the form of a cavity top wall 32. One of the walls 12 of the cavity takes the form of a cavity rear wall 38. Two of the walls 12 of the cavity take the form of a cavity side wall 34, 36. Only one of the walls 12 of the cavity will be described below.

(10) The cooking appliance 10 has a user interface 42 for the purpose of inputting and/or selecting operating parameters (cf. FIG. 1), for example a heating power and/or a heating power density and/or a heating zone. The user interface 42 is provided for the purpose of outputting a value of an operating parameter to a user.

(11) The cooking appliance 10 has a control unit 40. The control unit 40 is provided for the purpose of performing actions and/or changing settings, in dependence on operating parameters that are input using the user interface 42. In one operating condition, the control unit 40 controls a supply of energy to at least one induction heating element 14 (cf. FIG. 2).

(12) In the present exemplary embodiment, the cooking appliance 10 has two induction heating elements 14. As an alternative, the cooking appliance 10 could in particular have a different number of induction heating elements 14. For example, the cooking appliance 10 could have precisely one induction heating element 14. As an alternative, the cooking appliance 10 could have for example at least three, in particular at least four, advantageously at least five and preferably a multiplicity of induction heating elements 14.

(13) In one operating condition, the induction heating elements 14 are arranged outside the cooking compartment 26. In an installed position, a lower induction heating element 14 of the induction heating elements 14 is arranged below the wall 12 of the cavity that takes the form of the cavity bottom wall 30. The lower induction heating element 16 is arranged on the wall 12 of the cavity that takes the form of the cavity bottom wall 30.

(14) In an installed position, an upper induction heating element 14 of the induction heating elements 14 is arranged above the wall 12 of the cavity that takes the form of the cavity top wall 32. The upper induction heating element 14 is arranged on the wall 12 of the cavity that takes the form of the cavity top wall 32.

(15) As an alternative, at least one induction heating element 14 could be arranged on a wall 12 of the cavity that takes the form of a side wall 34, 36 and/or on a wall 12 of the cavity that takes the form of the cavity rear wall 38. Only one of the induction heating elements 14 will be described below.

(16) In the present exemplary embodiment, the cooking appliance 10 has two electrically conductive screening elements 16. The number of screening elements 16 and the number of induction heating elements 14 are substantially identical. Only one of the screening elements 16 will be described below.

(17) Only the region illustrated in FIG. 3—in which, in an installed position, the lower induction heating element 14 is arranged—will be described below. An analogous description may be given for a region in which, in an installed position, the upper induction heating element 14 is arranged.

(18) The screening element 16 is provided for the purpose of screening an electrical and/or magnetic field generated by the induction heating element 14. In an operating condition in which in particular high-frequency alternating current flows through the induction heating element 14, the screening element 16 screens out the electrical and/or magnetic field generated by the induction heating element 14.

(19) In the operating condition, the screening element 16 screens a region that is arranged on a side of the screening element 16 remote from the wall 12 of the cavity from the electrical and/or magnetic field generated by the induction heating element 14. In an assembled condition, the screening element 16 is arranged in part on a side of the induction heating element 14 remote from the wall 12 of the cavity.

(20) In the present exemplary embodiment, the screening element 16 is made largely from aluminum. As an alternative, the screening element 16 could be made largely from an aluminum alloy. The screening element 16 is substantially plate-like in shape.

(21) In the assembled condition, the screening element 16 is arranged spaced from the induction heating element 14. The cooking appliance 10 has a thermal insulation element 18. In the assembled condition, the thermal insulation element 18 is arranged in part between the screening element 16 and the induction heating element 14.

(22) In the installed condition, the thermal insulation element 18 directly adjoins the induction heating element 14. The thermal insulation element 18 directly adjoins the screening element 16 in the installed condition.

(23) An intermediate space between the screening element 16 and the induction heating element 14 is free of ferrites provided for the purpose of conducting a magnetic field generated by the induction heating element 14. The cooking appliance 10 is free of ferrites provided for the purpose of conducting a magnetic field generated by the induction heating element 14. The cooker 22 is free of ferrites provided for the purpose of conducting a magnetic field generated by the induction heating element 14. In the assembled condition, the screening element 16 is spaced from the wall 12 of the cavity by substantially 45 mm.

(24) The cooking appliance 10 has an electrical insulation element 20. In the assembled condition, the electrical insulation element 20 is arranged in part between the induction heating element 14 and the wall 12 of the cavity. In the present exemplary embodiment, the electrical insulation element 20 is made largely from mica.

(25) In the present exemplary embodiment, the electrical insulation element 20 has a thickness of substantially 0.3 mm. In the assembled condition, the induction heating element 14 is spaced from the wall 12 of the cavity by substantially 0.3 mm.

(26) In the assembled condition, the electrical insulation element 20 directly adjoins the induction heating element 14. In the assembled condition, the electrical insulation element 20 directly adjoins the wall 12 of the cavity.

(27) In the operating condition, the electrical insulation element 20 insulates the wall 12 of the cavity from a high-frequency alternating current flowing in the induction heating element 14. In the operating condition, the induction heating element 14 heats the wall 12 of the cavity inductively. In the operating condition, the induction heating element 14 heats the wall 12 of the cavity to a temperature of substantially 550° C.

LIST OF REFERENCE NUMERALS

(28) 10 Cooking appliance 12 Wall of the cavity 14 Induction heating element 16 Screening element 18 Thermal insulation element 20 Electrical insulation element 22 Cooker 24 Cavity 26 Cooking compartment 28 Cooker door 30 Cavity bottom wall 32 Cavity top wall 34 Cavity side wall 36 Cavity side wall 38 Cavity rear wall 40 Control unit 42 User interface