Sensor unit for a suction hood, suction hood and cooking device

1. Sensor unit ( 2 ) for a suction hood ( 1 ), wherein the sensor unit ( 2 ) controls or can control the suction hood ( 1 ), wherein the sensor unit ( 2 ) comprises a sensor operated mode, wherein an operation of the suction hood ( 1 ) is dependent on a measured value of at least one sensor ( 21 , 22 )

wherein the at least one sensor includes a sonar distance sensor activated by proximity of a cooking vessel, and a processing unit activates the suction hood after the measured value from the sonar distance sensor exceeds a threshold value for a predefined time span.

2. Sensor unit according to claim 1 , wherein the sensor unit ( 2 ) comprises a) a second mode, wherein the suction hood ( 1 ) is turned off or wherein the sensor operated mode is deactivated and b) a third, conventional mode, wherein the suction hood ( 1 ) is continuously turned on.

3. Sensor unit according to claim 1 , a) wherein the at least one sensor ( 21 , 22 ) includes a sensor activated by fumes, by the temperature of fumes, and/or by the concentration of certain gases.

4. Sensor unit according to claim 1 , a) wherein the at least one sensor ( 21 , 22 ) includes a sensor activated by chemical substances, including smells and/or b) wherein the at least one sensor ( 21 , 22 ) includes a sensor activated by magnetic fields.

5. Sensor unit according to claim 1 , wherein the at least one sensor ( 21 , 22 ) includes a sensor activated by light.

6. Sensor unit according to claim 1 , wherein the threshold value is a first threshold value, and a) wherein in the sensor operated mode, the sensor unit ( 2 ) measures actual values and the suction hood ( 1 ) is turned on, when the measured value rises above the first threshold value ( 62 ), and turned off, when the measured value falls below a second threshold value ( 61 ), wherein b) the first threshold value is lower or higher than the second threshold value or equal to the second threshold value.

7. Sensor unit according to claim 1 , wherein the sensor unit ( 2 ) comprises a switching unit ( 23 ) which determines a working mode of the suction hood ( 1 ), wherein a type of measured values can be selected.

8. Suction hood with a sensor unit ( 2 ) according to claim 1 .

9. Suction hood according to claim 8 , a) wherein the suction hood ( 1 ) comprises a fan, for sucking air with different suction volumes, b) wherein the suction volume of the suction hood ( 1 ) depends on a level of the values measured by the sensor unit ( 2 ), c) wherein, at least for one suction volume, a change in the suction volume of the suction hood ( 1 ) is at least substantially proportional, reciprocal or in an exponential dependency to a change of the measured value.

10. Suction hood according to claim 8 , a) wherein the sensor unit ( 2 ) is used as a control unit which is connected to the suction hood ( 1 ) by at least one cable ( 31 ), b) wherein the at least one cable ( 31 ) transmits a signal indicative of a desired suction volume.

11. Suction hood according to claim 8 , wherein the suction hood ( 1 ) is mounted above a cooking appliance ( 4 ).

12. A cooking device with a suction hood according to claim 1 , a) wherein the cooking device is a gas cooking device and/or induction cooking device and/or electric cooking device and/or b) wherein the cooking device comprises a cooking hob and/or an oven and/or c) wherein the suction hood is controllable by the cooking device in a contactless way, by the usage of the sensor unit ( 2 ).

13. Attachment of a sensor unit ( 2 ) according to claim 1 to an existing suction hood ( 1 ).

14. A cooking system, comprising:

an induction cooking device comprising a glass ceramic cooking hob; and

a suction hood comprising a sensor unit,

wherein the sensor unit controls or can control the suction hood, the sensor unit comprising a sensor operated mode, wherein an operation of the suction hood is dependent on a measured value of at least one sensor, and

wherein the sensor unit is activated by magnetic fields, wherein the sensor unit comprises a switching unit which determines a working mode of the suction hood, wherein a type of measured values measured by the sensor unit can be selected.