Cooling system for a cooking oven

Abstract

A cooling system (12) for a cooking oven (10) is provided. The cooling system (12) has a first air path including a first suction area (28), at least one first fan (20) and a first air guidance (48) of a blowing-out area (30) connected in series. The cooling system (12) has a second air path including a second suction area, at least one second fan (22) and a second air guidance (50) of the blowing-out area (30) connected in series. The first suction area (28) is connected to an oven cavity (14) of the cooking oven (10) via an vapour outlet (32), so that the first air path is provided for conveying moist air. The second suction area is connected to the environment of the cooking oven (10), so that the second air path is provided for conveying dry air.

Claims

1. A cooling system for a cooking oven, the cooking oven comprising a casing having a left side wall and a right side wall opposite one another, and a rear side wall, wherein an oven door is disposed at a front side of the cooking oven opposite said rear side wall, comprising: a first air path including a first suction area, at least one first fan and a first air guidance of a blowing-out area connected in series, and a second air path including an inlet formed through either said left side wall or said right wall of said casing of the cooking oven, a second suction area, at least one second fan and a second air guidance of the blowing-out area connected in series, the first suction area being connected to an oven cavity of the cooking oven via an vapour outlet, so that the first air path is provided for conveying moist air, and the second suction area being connected to an environment of the cooking oven, so that the second air path is provided for conveying dry air.

2. The cooling system according to claim 1, wherein the cooling system is provided for a microwave oven or a cooking oven with microwave heating function.

3. The cooling system according to claim 1, wherein the cooling system is provided for a cooking oven with pyrolytic cleaning function.

4. The cooling system according to claim 1, wherein the cooling system is arranged or arrangeable above the oven cavity of the cooking oven, close to a heating element inside the oven cavity of the cooking oven.

5. The cooling system according to claim 1, wherein the blowing-out area is subdivided into the first air guidance and the second air guidance.

6. The cooling system according to claim 1, wherein respective cross-sections of the blowing-out area, the first air guidance, and the second air guidance increase in direction of the air flow.

7. The cooling system according to claim 1, wherein the first suction area is connected or connectable to a cooling channel inside the oven door of the cooking oven.

8. The cooling system according to claim 1, wherein at least one of the fans is a radial fan.

9. The cooling system according to claim 1, wherein at least one of the fans is a centrifugal fan.

10. The cooling system according to claim 1, wherein a first fan wheel of the at least one first fan and a second fan wheel of the at least one second fan comprise a common axis of rotation.

11. The cooling system according to claim 1, wherein the at least one first fan and the at least one second fan are arranged one upon the other.

12. The cooling system according to claim 1, wherein the cooling system comprises at least one front outlet opening connected to the blowing-out area, said front outlet opening being arranged or arrangeable at the front side of the cooking oven.

13. The cooling system according to claim 1, further comprising at least one front inlet opening connected to the first suction area and being arranged or arrangeable at a front frame that encloses the oven cavity of the cooking oven.

14. A cooking oven comprising the cooling system according to claim 1.

15. The cooking oven according to claim 14, wherein the cooking oven is a microwave oven or a cooking oven with microwave heating function.

16. The cooking oven according to claim 14, wherein the cooking oven includes a pyrolytic cleaning function.

17. A cooking oven comprising: a casing having a left side wall and a right side wall opposite one another, and a rear side wall, an oven cavity having a front opening, an oven door at a front side of the cooking oven opposite said rear side wall and adapted to close said front opening in a closed position of said door, a heating element in an upper portion of the oven cavity, and a cooling system disposed above said oven cavity; the cooling system comprising a first, moist air-flow path and a second, dry air-flow path; the moist air-flow path comprising a front inlet opening in a front frame of the cooking oven that communicates with a cooling channel in said door in the closed position thereof, a first suction area in communication with said front inlet opening, a first fan for drawing air from said first suction area and exhausting air via a first fan outlet to a first air guidance portion of a blowing-out area, a front outlet opening in said front frame arranged above said front inlet opening and in communication with said blowing-out area, and a vapour outlet interconnected between said oven cavity and said first suction area for delivering moist air to said first suction area when said first fan is in operation; the dry air-flow path comprising an inlet formed through either said left side wall or said right side wall of said casing of the cooking oven, a second suction area in communication with said inlet, a second fan for drawing air from said second suction area and exhausting air via a second fan outlet to a second air guidance portion of the blowing-out area, and said front outlet opening in said front frame such that in operation within said blowing-out area moist air discharged from said first fan to the first air guidance portion is combined with dry air discharged from said second fan to the second air guidance portion to be commonly discharged via said front outlet opening; said first and second fans being coaxially arranged one above the other and being driven together by a common motor.

18. The cooking oven according to claim 17, said cooking oven having a microwave heating function, and a pyrolytic cleaning function effective to heat the oven cavity to a temperature up to about 500° C.

Description

(1) The present invention will be described in further detail with reference to the drawings, in which

(2) FIG. 1 illustrates a schematic sectional side view of a cooking oven including a cooling system according to a preferred embodiment of the present invention, and

(3) FIG. 2 illustrates a schematic sectional top view of the cooking oven including the cooling system according to the preferred embodiment of the present invention.

(4) FIG. 1 illustrates a schematic sectional side view of a cooking oven 10 including a cooling system 12 according to a preferred embodiment of the present invention.

(5) The cooking oven 10 includes an oven cavity 14 and an oven door 18 at the front side of said oven cavity 14. A loading opening of the oven cavity 14 is closable by the oven door 18. A heating element 16 is arranged within an upper portion of the oven cavity 14. The cooling system 12 is arranged above the oven cavity 14.

(6) The cooling system 12 comprises a first fan wheel 20 and a second fan wheel 22. In this example, the second fan wheel 22 is arranged above the first fan wheel 20. The first fan wheel 20 is driven by a first motor 24, while the second fan wheel 22 is driven by a second motor 26. Alternatively, the first fan wheel 20 and the second fan wheel 22 may be driven by a common motor. The first fan wheel 20 forms a first fan 20, while the second fan wheel 22 forms a second fan 22. In this example, the fans 20 and 22 are radial fans.

(7) Further, the cooling system 12 comprises a first suction area 28 and a blowing-out area 30. The blowing-out area 30 is arranged above the first suction area 28. The first fan wheel 20 and the second fan wheel 22 are arranged inside the blowing-out area 30.

(8) A vapour outlet 32 is interconnected between the oven cavity 14 and the first suction area 28. The first suction area 28 is interconnected between an inlet of the first fan 20 and a front inlet opening 38. Said front inlet opening 38 is arranged in a front frame enclosing a front opening of the oven cavity 14.

(9) Further, a front outlet opening 40 is arranged in said front frame and above the front inlet opening 38. In a closed state of the oven door 18, the front inlet opening 38 is connected to a cooling channel 36 extending inside the oven door 18. The cooling channel 36 of the oven door 18 is connected to a door inlet opening 34. In this example, the door inlet opening 34 extends over the bottom side of the oven door 18. Alternatively or additionally, the door inlet opening 34 may extend at least partially over the side walls of said oven door 18. A first air path extends from the door inlet opening 34, through the cooling channel 36, the front inlet opening 38, the first suction area 28, the first fan 20 and the blowing-out area 30 to the front outlet opening 40. Since the vapour outlet 32 is connected to the first suction area 28, moist air is conveyed along the last portion of the first air path.

(10) FIG. 2 illustrates a schematic sectional top view of the cooking oven 10 including the cooling system 12 according to the preferred embodiment of the present invention. The cooling system 12 is arranged above the oven cavity 14.

(11) The blowing-out area 30 is subdivided into a first air guidance 48 and a second air guidance 50. The first fan 20 includes a first fan outlet opening 44. In a similar way, the second fan 22 includes a second fan outlet opening 42. The first fan outlet opening 44 corresponds with the first air guidance 50, while the second fan outlet opening 42 corresponds with the second air guidance 48. The first air path extends through the first air guidance 50 of the blowing-out area 30.

(12) A second air path extends from inlet slots 46, through a second suction area 28, the second fan 20, and the second air guidance 48 of the blowing-out area 30 to the front outlet opening 40. Said inlet slots 46 may be formed in a side wall of a casing of the cooking oven 10. The second suction area 28 is not explicitly shown in FIGS. 1 and 2. Dry air is conveyed along the second air path.

(13) The cooling system 12 according to the present invention includes two air paths, wherein moist air is conveyed by the first air path, while dry air is conveyed by the second air path. The separation of moist and dry air allows that moisture-sensitive components to be cooled are treated from moist air and cooled by dry air only.

(14) For example, the cooling system 12 of the present invention is provided for a microwave oven or a cooking oven with microwave heating function. Further, the cooling system 12 of the present invention may be provided for a cooking oven with pyrolytic cleaning function.

(15) Although an illustrative embodiment of the present invention has been described herein with reference to the accompanying drawings, it is to be understood that the present invention is not limited to that precise embodiment, and that various other changes and modifications may be affected therein by one skilled in the art without departing from the scope or spirit of the invention. All such changes and modifications are intended to be included within the scope of the invention as defined by the appended claims.

LIST OF REFERENCE NUMERALS

(16) 10 cooking oven 12 cooling system 14 oven cavity 16 heating element 18 oven door 20 first fan wheel, first fan 22 second fan wheel, second fan 24 first fan motor 26 second fan motor 28 first suction area 30 blowing-out area 32 vapour outlet 34 door inlet opening 36 cooling channel 38 front inlet opening 40 front outlet opening 42 first fan outlet opening 44 second fan outlet opening 46 inlet slots 50 first air guidance 48 second air guidance