HK1164621A - A microwave sealing device of an opening for a rotating shaft - Google Patents

Description

Microwave sealing device for opening of rotating shaft

Technical Field

The present invention relates to a microwave sealing device for an opening of a rotating shaft or shaft according to claim 1. Furthermore, the present invention relates to a microwave oven having at least one sealing device for an opening of a rotating shaft or shaft according to claim 15.

Background

Microwave ovens generate strong electromagnetic or magnetic fields to heat food and beverages. However, such strong electromagnetic fields pose a potential threat to the health of the operator when the electromagnetic field or parts of the electromagnetic field leave the cavity of the microwave oven. The opening of the cavity is a very critical component.

In particular, openings for rotating shafts or shafts (e.g. for hot air fans) are critical points. The diameter of the opening in the wall is usually larger than the diameter of the enclosed rotating body due to the axial movement caused by the rapid rotation of the shaft. It is therefore necessary to seal such openings.

Known solutions for sealing such openings are very bulky or are subject to mechanical tolerances with respect to leakage. Furthermore, heat transfer due to direct metal contact between the hot cavity wall and the seal may cause problems with electrical components, such as the electric drive of a fan, the motor of a turntable or other rotating component.

Disclosure of Invention

It is an object of the present invention to provide a microwave sealing device for an opening of a rotating shaft or shaft which prevents excessive heat transfer from the cavity wall to the electrical components.

This object is achieved by a microwave sealing device according to claim 1.

According to the present invention, there is provided,

the sealing means is arranged around a portion of the shaft or axle;

the sealing device comprises a front panel and a base member;

the front panel is formed as a planar disk and includes a center hole and a plurality of cutouts at a center thereof;

the base member is formed as a hollow member having a peripheral wall and two opposing sides;

at least one of two opposite sides of the base part is open;

the base component comprises a plurality of cutouts in the peripheral wall; and

the front panel is mounted on the open side of the base part or on one of the two open sides of the base part, respectively.

The core of the invention is a front panel with a cut-out and a corresponding base part formed as a hollow part. Both for surrounding a portion of the shaft or axle. The shape of the base member may be arbitrary. The sealing means of the invention can be arranged tightly outside the cavity wall without any mechanical and electrical contact between the sealing means and the cavity wall. Thus, there is no heat transfer from the cavity wall to the electrical device.

According to a preferred embodiment of the invention, the cut-out of the front panel is initiated by a corresponding cut-out of the base part. In particular, the cut-out of the front panel and the corresponding cut-out of the base member are substantially orthogonal to each other.

For use in a microwave oven, the front panel may be arranged in parallel with the opening.

According to a first embodiment of the invention, the front panel covers the open side of the base part, on which the front panel is mounted. In particular, the diameter of the front panel is substantially equal to the diameter of the open side on which the front panel is mounted.

According to a second embodiment of the invention, the open side of the base part, on which the front panel is mounted, covers the central hole of the front panel. In particular, the diameter of the open side of the base member, on which the front panel is mounted, is substantially equal to the diameter of the central hole of the front panel.

For example, the cut-outs of the front panel are formed as slots, circular holes, elliptical holes and/or rectangular holes.

Similarly, the cut-outs of the base member are formed as slots, circular holes, elliptical holes and/or rectangular holes.

Preferably, the front panel may include a plurality of scalloped portions separated by slots.

Furthermore, the sealing device is formed as a one-piece component.

The sealing means is made of at least one electrically conductive material. In particular, the sealing means are made of metal.

The object of the invention is also achieved by a microwave oven having at least one sealing means for an opening of a rotating shaft or shaft, wherein the microwave oven comprises a sealing means as described above.

Drawings

The invention will be described in more detail below by means of example embodiments. Reference will therefore be made to the accompanying drawings, wherein:

fig. 1 shows a schematic perspective view of a microwave sealing device for an opening of a rotating shaft or shaft according to a first embodiment of the present invention;

fig. 2 shows a schematic perspective view of a microwave sealing device for an opening of a rotating shaft or shaft according to a second embodiment of the present invention;

figure 3 shows a schematic side view of an application of a microwave sealing device according to a first embodiment of the invention;

figure 4 shows a schematic top view of the front panel of the sealing device according to the first embodiment of the invention;

fig. 5 shows a schematic top view of another example of a front panel of a sealing device according to a first embodiment of the invention;

fig. 6 shows a schematic top view of a further example of a front panel of the sealing device according to the first embodiment of the invention;

fig. 7 shows a schematic front view of a front panel of a sealing device according to a third embodiment of the invention; and

fig. 8 shows a schematic front view of a base part of a sealing device according to a third embodiment of the invention.

Detailed Description

Fig. 1 shows a schematic perspective view of a microwave sealing device 10 for an opening of a rotating shaft or axle according to a first embodiment of the present invention. The microwave sealing device 10 includes a front panel 12 and a base member 14.

The front panel 12 is formed as a circular disk and includes a central aperture 16 at its center. The front panel 12 is subdivided into a plurality of sector portions (sectors) 18. In this example, the front panel 12 includes eight identical scalloped portions 18. The scallops 18 are separated by slots 20.

The base member 14 is formed as a cylindrical cylinder. The front panel 12 covers one of the two open sides of the base member 14. The diameter of the front panel 12 is approximately equal to the diameter of the base member 14. The base member 14 comprises a plurality of slots 22 extending parallel to the longitudinal axis of said base member 14. The slot 22 extends over approximately half the length of the base member 14. Each slot 22 of the base member 14 corresponds to one slot 20 of the front panel 12. Each slot 20 of the front panel 12 begins with a corresponding slot 22 of the base member 14. The respective slots 20 and 22 extend perpendicular to each other.

The microwave sealing device 10 is made of an electrically conductive material, in particular a metal.

The microwave sealing device 10 is arranged to seal an opening for a rotating shaft or shaft. Thus, the shaft or axle extends along the central longitudinal axis of the base member 14. Further, the axle or shaft is disposed through the front panel 12 through the central aperture 16 and through the base member 14.

Fig. 2 shows a schematic perspective view of a microwave sealing device 30 for an opening of a rotating shaft 26 or shaft according to a second embodiment of the present invention. The microwave sealing device 30 includes a front panel 32 and a base member 34.

The front panel 32 is formed as a circular disk having a central aperture 36 at its center. The front panel 32 is subdivided into a plurality of scalloped portions 38. In this example, the front panel 32 includes eight identical scalloped portions 38. The scallops 38 are separated by slots 40.

The base member 34 is formed as a cylindrical barrel. The front panel 32 surrounds one of the two open sides of the base member 34. The front panel 32 has an inner diameter corresponding to the central bore 16 and is approximately equal to the diameter of the base member 34. The base member 34 includes a plurality of slots 42 extending parallel to the longitudinal axis of the base member 34. The slot 42 extends over approximately half the length of the base member 34. Each slot 42 of the base member 34 corresponds to one slot 40 of the front panel 32. Each slot 40 of the front panel 32 begins with a corresponding slot 42 of the base member 34. The respective slots 40 and 42 extend perpendicular to each other.

The microwave sealing means 30 are also made of an electrically conductive material, in particular metal.

The microwave sealing device 30 is arranged to seal an opening for a rotating shaft or shaft. Thus, the shaft 26 or axle extends along a central longitudinal axis of the base member 34. Also, the axle or shaft passes through the front panel 32 through a central aperture 36 and through the base member 34.

Fig. 3 shows a schematic side view of an application of a microwave sealing device 10 according to a first embodiment of the invention.

The microwave seal 10 is disposed alongside an opening in a cavity wall 24 of a microwave oven. The sealing device 10 is arranged outside the cavity wall 24. The shaft 26 passes through the opening in the cavity wall 24 and the seal 10. The axis 26 extends perpendicular to the plane of the cavity wall 26. Also, the motor 28 is disposed outside of the cavity wall 24. The sealing device 10 is disposed between the motor 28 and the cavity wall 24. The sealing device 10 is mounted on a motor 28.

The seal 10 is arranged so that there is no mechanical and electrical contact between the motor 28 and the cavity wall 24. The seal 10 is mounted on the motor 28 rather than on the cavity wall 24. Thus, there is substantially no heat transfer from the cavity wall 24 to the motor 28.

Fig. 4 shows a schematic top view of the front panel 12 of the sealing device 10 according to the first embodiment of the invention. Figure 4 shows the arrangement of scalloped portions 18 and slots 20. The front panel 12 is formed as a circular disk.

Fig. 5 shows a schematic top view of another example of the front panel 12 of the sealing device 10 according to the first embodiment of the present invention. The front panel 12 is formed in a similar manner as in fig. 4, wherein two additional elements 44 are arranged at an outer portion of the front panel 12. Said element 44 extends perpendicularly to the plane of the front panel 12.

Fig. 6 shows a schematic top view of a further example of the front panel 12 of the sealing device 10 according to the first embodiment of the invention. The front panel 12 is formed in a similar manner as in fig. 4, wherein two additional L-shaped elements 46 are arranged at the outer portion of the front panel 12.

The elements 44 and 46 may serve as brackets for securing the front panel 12 to the base member 14.

Fig. 7 shows a schematic front view of a front panel 52 of a sealing device 50 according to a third embodiment of the invention. The front panel 52 is formed as a circular disk having a circular center hole 56 at its center. The diameter of the circular hole 56 is about one third of the diameter of the front panel 52. The front panel 52 includes four slots 58 and four holes 60 alternately arranged in the circumferential direction. Four slots 58 extend in the radial direction of the front panel 52.

Fig. 8 shows a schematic front view of the base part 54 of a sealing device 50 according to a third embodiment of the invention. The base member 54 has a rectangular cross section. The base member 54 includes a plurality of cutouts 62. In this example, the base member 54 includes seven cutouts 62. The cutouts 62 may be formed, for example, as slots, circular holes, elliptical holes, and/or rectangular holes.

In the above embodiments, there is no mechanical and electrical contact between the cavity wall 24 surrounding the opening and the sealing means 10, 30 and 50.

The sealing devices 10, 30 and 50 are made of metal, metal mesh and/or any material capable of being metallized, in particular a polymer or ceramic. Furthermore, the sealing means 10, 30 and 50 can be manufactured from a material with conductive filler or nanotechnology material. The sealing devices 10, 30 and 50 may be a one-piece component.

In general, the base members 14, 34 and 54 are hollow members having any shape. Preferably, the base members 14, 34 and 54 are hollow cylinders or hollow members having a rectangular or oval cross-section.

The shape of the front panels 12, 32 and 52 may be different from the shape of the base members 14, 34 and 54. The shape of the aperture 60 in the front panels 12, 32 and 52 is arbitrary, such as circular, oval or rectangular. The shape of slots 20, 22, 40, 42 and 58 is arbitrary. Preferably, the shape of the slots 20, 22, 40, 42 and 58 has a uniform width, a continuously decreasing or increasing width, or a stepped width. For example, the width of the slots 20, 22, 40, 42, and 58 is stepped at the angle formed by the front panel 12, 32, 52 and the base member 14, 34, 54.

Alternatively, the slots 20, 22, 40, 42, and 58 can be partially or completely replaced by an embossed groove. Preferably, slots 20, 22, 40, 42 and 58, and variations thereof, are aligned, for example, orthogonal to the edge of the front panel or parallel to axis 26, respectively.

The sealing devices 10, 30 and 50 may be modified to seal extractable objects such as rotary tags (turn tips).

In the above embodiments, the sealing devices 10, 30 and 50 are stationary parts of the microwave oven. Alternatively, the sealing devices 10, 30 and 50 can be rotatable. In this case, the front panels 12, 32 and 52 may not have any mechanical or electrical contact with the components that must be sealed.

Reference number table

10 sealing device

12 front panel

14 base part

16 center hole

18 sector part

20 front panel slot

22 slots of the base part

24 cavity wall

26 shaft

28 Motor

30 sealing device

32 front panel

34 base part

36 center hole

38 sector part

40 front panel slot

42 slot of base part

44 element

46 element

50 sealing device

52 front panel

54 base part

56 center hole

58 front panel slot

60 holes in the front panel

62 cut-out of base part

Claims (15)

1. A microwave sealing device for an opening of a rotating shaft (26) or shaft, wherein:

the sealing device (10; 30; 50) is arranged around a shaft (26) or a part of a shaft,

the sealing device (10; 30; 50) comprises a front panel (12; 32; 52) and a base part (14; 34; 54),

the front panel (12; 32; 52) is formed as a planar disc and comprises a central hole (16; 36; 56) at its centre and a plurality of cut-outs (20; 40; 58, 60),

the base part (14; 34; 54) is formed as a hollow part, having a peripheral wall and two opposite sides,

at least one of two opposite sides of the base part (14; 34; 54) is open,

the base part (14; 34; 54) comprises a plurality of cut-outs (22; 42; 62) in the peripheral wall, and

the front panels (12; 32; 52) are each mounted on an open side of the base part (14; 34; 54) or on one of the two open sides of the base part.

2. A microwave sealing arrangement according to claim 1, wherein:

the cut-outs (20; 40; 58, 60) of the front panel (12; 32; 52) start from corresponding cut-outs (22; 42; 62) of the base part (14; 34; 54).

3. A microwave sealing arrangement according to claim 2, wherein:

the cut-outs (20; 40; 58, 60) of the front panel (12; 32; 52) and the corresponding cut-outs (22; 42; 62) of the base member (14; 34; 54) are substantially orthogonal to each other.

4. A microwave sealing arrangement according to any preceding claim, wherein:

the front panel (12; 32; 52) is arranged parallel to the opening.

5. A microwave sealing arrangement according to any preceding claim, wherein:

the front panel (12; 32; 52) covers the open side of the base member (14; 34; 54) on which the front panel (12; 32; 52) is mounted.

6. A microwave sealing arrangement according to claim 5, wherein:

the diameter of the front panel (12; 32; 52) is substantially equal to the diameter of the open side on which the front panel (12; 32; 52) is mounted.

7. A microwave sealing arrangement according to any one of claims 1 to 4, wherein:

the open side of the base member (14; 34; 54) on which the front panel (12; 32; 52) is mounted covers the central aperture (16; 36; 56) of the front panel (12; 32; 52).

8. A microwave sealing arrangement according to claim 7, wherein:

the diameter of the open side of the base part (14; 34; 54) on which the front panel (12; 32; 52) is mounted is substantially equal to the diameter of the central hole (16; 36; 56) of the front panel (12; 32; 52).

9. A microwave sealing arrangement according to any preceding claim, wherein:

the cut-outs (20; 40; 58, 60) of the front panel (12; 32; 52) are formed as slots, circular holes, elliptical holes and/or rectangular holes.

10. A microwave sealing arrangement according to any preceding claim, wherein:

the cutouts (22; 42; 62) of the base part (14; 34; 54) are formed as slots, circular holes, elliptical holes and/or rectangular holes.

11. A microwave sealing arrangement according to any preceding claim, wherein:

the front panel (12; 32; 52) includes a plurality of scallops (18; 38) separated by slots (20; 40).

12. A microwave sealing arrangement according to any preceding claim, wherein:

the sealing device (10; 30; 50) is formed as a one-piece component.

13. A microwave sealing arrangement according to any preceding claim, wherein:

the sealing device (10; 30; 50) is made of at least one electrically conductive material.

14. A microwave sealing arrangement in accordance with claim 13, wherein:

the sealing device (10; 30; 50) is made of metal.

15. Microwave oven with at least one sealing device (10; 30; 50) for an opening of a rotating shaft (26) or shaft, characterized in that:

the microwave oven comprising at least one sealing device (10; 30; 50) according to any one of claims 1 to 14.