Operating an extractor hood, extractor hood, and system

Abstract

(Method for operating an extractor hood and extractor hood) The invention relates to a method for operating an extractor hood (3), in which, during the operation of an electric motor (8) of an extractor fan (6), at least one operating variable (U_i, I_i, D_s) of the electric motor (8) is recorded and, on the basis of the at least one recorded operating variable (U_i, I_i, D_s), at least one conclusion is drawn regarding at least one heat treatment process from which vapor (S) is being extracted by the extractor hood (3). The invention also relates to an extractor hood (3) which is designed to carry out the method. The invention also relates to a system (1, 3) having a cooking device (1) with a hob (2) and an extractor hood (3), the extractor hood (3) being provided in order to extract vapor (S) rising from food (G) being heat-treated on the hob (2).

Description

[0001] Operating a range hood, range hood and system

[0002] The invention relates to a method for operating a range hood with at least one exhaust fan driven by an electric motor. The invention also relates to a range hood configured to carry out the method. The invention further relates to a system comprising a cooking appliance with a hob and a range hood, wherein the range hood is designed to extract fumes rising from food being heat-treated on the hob.

[0003] There are known extractor hoods that draw in fumes rising from a cooktop. For this extraction, it is known to use at least one extractor fan with a speed-controlled electric motor as the drive mechanism.

[0004] The object of the present invention is to overcome at least some of the disadvantages of the prior art and, in particular, to provide an improved means of detecting steam emitted by food being cooked.

[0005] This problem is solved according to the features of the independent claims. Preferred embodiments can be found in particular in the dependent claims.

[0006] The problem is solved by a method for operating a cooker hood in which, when an electric motor of an extractor fan is operated, at least one operating parameter of the electric motor is monitored and, depending on the at least one monitored operating parameter, at least one conclusion is drawn about at least one heat treatment process, the fumes of which are extracted by the cooker hood.

[0007] This method offers the advantage of being simple and cost-effective to implement. It is based, among other things, on the understanding that the fumes, particularly their density, can be a characteristic parameter of the heat treatment process. Density, in turn, can influence the power consumption of the exhaust fan. For example, a higher density may require the exhaust fan to operate at a higher electrical power to maintain a specified speed. Alternatively, the motor speed of the exhaust fan may decrease at a constant power input if the density of the extracted atmosphere or fumes increases. Consequently, the monitored electrical value or the fan speed can serve as a measure of the fume density, which in turn allows conclusions to be drawn about the heat treatment process.The conclusion regarding a heat treatment process can include a conclusion regarding the type and / or progress of the heat treatment process and / or the type and / or condition of the goods.

[0008] An operating parameter of an electric motor can be understood, in particular, as a physical quantity that characterizes the operation of the electric motor. An operating parameter can therefore be, for example, a control, regulation, and / or output parameter.

[0009] The monitoring of an operational parameter can include the fact that the operational parameter is measured or can be derived or calculated from at least one measured physical quantity, which can also be referred to as a "monitored" operational parameter. The monitoring of an operational parameter can also include that this operational parameter is predefined and can be retrieved in order to draw at least one conclusion. The at least one monitored operational parameter can be a quantity mathematically linked from at least one measured operational parameter and at least one predefined quantity.

[0010] Tracking company size in a training course can involve determining and storing one or more sequentially defined values ​​of the company size for evaluation. This corresponds to recording a trend or curve.

[0011] The heat treatment process is, in particular, a process in which goods, especially food to be cooked, are exposed to heat energy on a cooktop. If fumes are generated during the heat treatment process, these can be drawn in by the extractor hood when the exhaust fan is in operation and thus extracted. If the goods are food to be cooked, the heat treatment process can be a cooking process, e.g., including boiling, frying, thickening, etc.

[0012] "Haze" refers to air, especially hot air, possibly containing additional substances. For example, haze can include air enriched with water ("steam") as well as air or steam enriched with fats ("fumes"). Other substances can include, for example, VOCs (volatile organic compounds) and / or volatile and / or particulate combustion products. These combustion products can be generated particularly during abnormal operation, such as when food burns.

[0013] The condition of the goods can include, for example, a cooked state or an abnormal state such as scorching or burning, possibly with fire formation.

[0014] It is a further development that at least one inference about a heat treatment process includes an inference about a type of heat treatment process, e.g., the presence of a cooking process (e.g., of spaghetti) or a process for boiling down or reducing sauce.

[0015] This configuration includes at least one operating parameter comprising at least one electrical parameter applied to the electric motor. This electrical parameter can be at least one measured parameter (e.g., current and / or voltage), a parameter derived from at least one measured parameter (e.g., calculated or converted, such as electrical power), and / or a predetermined parameter (e.g., a voltage applied with high accuracy that is not measured or does not need to be measured). This configuration is particularly advantageous when the motor speed is kept constant.

[0016] In this configuration, the electrical quantity is the electrical power delivered to the electric motor. Advantageously, the electrical power is usually precisely known and often already monitored, for example, for speed control if the electric motor is a speed-controlled motor. The electrical power can be calculated, for instance, by multiplying a measured motor current or current draw by a measured or specified drive voltage.

[0017] Alternatively or additionally, electrical energy can be used as the electrical quantity, for example by determining the electrical power and averaging it over a specified period, e.g. from a certain starting time or according to the type of running time window.

[0018] The at least one operating parameter can be specified in a further training course in the form of a substitute parameter that represents a measure of the respective electrical quantity but, for example, does not have its physical units. Thus, in a speed-controlled electric motor, at least one electrical quantity can be a control parameter of a control system regulating the electric motor. The control parameter can, in particular, be a manipulated variable, e.g., a PI or PID manipulated variable, and, for example, represent a measure of the applied electrical power.

[0019] This configuration includes at least one operating parameter, specifically the motor speed. The motor speed can be measured directly (e.g., by a speed sensor) or derived from the electric motor's electrical parameters. This configuration is particularly advantageous when the electrical power input to the electric motor needs to be kept constant.

[0020] One design allows at least one conclusion to be drawn about a heat treatment process from a (curve) progression of the tracked, especially measured, operating parameter. This is advantageous for a particularly reliable conclusion about the heat treatment process.

[0021] For example, the heat treatment process can be characterized or identified based on the number of extrema, the temporal position of at least one extremum, slopes, accelerations, etc., within its curve. In principle, all possible parameters that can be meaningfully evaluated using curve analysis can be used to draw conclusions about the heat treatment process. It is a further development that the curve represents the course of a deviation of the monitored operating parameter from a reference or target value; that is, not the course of electrical power or motor speed, but rather the course of a deviation of the actual electrical power or actual motor speed from a target, standard, or normal value, e.g., for vaporless air, possibly additionally at normal temperature and / or normal atmospheric pressure.

[0022] It is a further development that reference curves exist for different heat treatment processes, a correspondence of an actual curve profile with the reference curves is determined (e.g. using the method of least squares), and if a sufficiently high and / or highest correspondence with one of the reference curves is recognized, a conclusion about the heat treatment process is drawn based on this reference curve.

[0023] One embodiment involves monitoring at least one electrical parameter (as the at least one operating parameter) as a function of the exhaust fan's motor speed. This enables even greater reliability of the inference. This embodiment includes, in particular, making the inference dependent on a current target speed if the exhaust fan's electric motor is speed-variable. A further development is the provision of different reference values, especially different reference curves, for different speeds or speed ranges.

[0024] One embodiment involves monitoring the motor speed (as at least one operating parameter) in relation to at least one electrical parameter. This also enables even greater reliability of the inference. This embodiment includes, in particular, making the inference dependent on the at least one electrical parameter if the exhaust fan's electric motor is adjustable to multiple power levels. A further development is the provision of different reference values, especially different reference curves, for different power levels.

[0025] It is a configuration such that at least one inference regarding a heat treatment process includes an inference regarding the presence of at least one specific heat treatment phase, i.e., a phase within a heat treatment process. Such a phase could, for example, be a phase in which the material (e.g., liquids such as soup, water, etc.) boils and therefore releases a large amount of steam or fumes. A heat treatment phase could also be, for example, a phase of a multi-phase heat treatment process in which the phases differ by releasing noticeably different amounts of vapor.

[0026] It is a configuration such that at least one inference regarding a heat treatment process includes an inference regarding a transition to at least one specific heat treatment phase, e.g., between two consecutive heat treatment phases with significantly different vapor generation. For example, when cooking potatoes, a phase in which the cooking water is heated to boiling point can be distinguished from a subsequent phase in which the potatoes are actually cooked.

[0027] It is a feature that at least one inference includes the detection of combustion. Advantageously, the method can also be used for hazard detection. This can be detected, for example, by observing that after a phase of high vapor production, the vapor production decreases noticeably or even ceases almost completely, only to then increase again. This process can be analogous to a pot or pan running empty, where food is initially boiled in water until the water evaporates, and subsequently the food begins to burn.

[0028] One embodiment involves the at least one inference being trained using artificial intelligence. This advantageously enables a particularly differentiated inference regarding the heat treatment process. This can be implemented by using an algorithm trained using artificial intelligence, especially based on experiments, to draw the at least one inference.

[0029] One design feature allows for at least one additional inference regarding the at least one heat treatment process to be drawn based on the air temperature prevailing in the area of ​​the extractor hood. This offers the advantage of allowing even more reliable inferences to be drawn about at least one heat treatment process. In particular, at least one monitored operating parameter can be normalized or corrected with respect to the air temperature. This takes into account the effect that the density of the extracted fumes or the extracted atmosphere containing the rising fumes also depends on its temperature.

[0030] The air temperature in the area of ​​the extractor hood can include the ambient temperature in the external environment of the extractor hood. This can be measured, for example, by a temperature sensor in the extractor hood, by an external temperature sensor and transmitted electronically, or obtained from weather forecasts.

[0031] The air temperature in the area of ​​the extractor hood can alternatively or additionally include the temperature of the fumes extracted by the extractor hood or the temperature of the extraction volume flow of the extractor hood. This can be measured, for example, by a (possibly additional) temperature sensor in the extractor hood.

[0032] One design feature allows for the additional inference of at least one heat treatment process to be drawn based on the ambient air pressure surrounding the extractor hood. This offers the advantage of more reliable inferences about at least one heat treatment process. In particular, at least one monitored operating parameter can be normalized or corrected with respect to the ambient air pressure. This takes into account the effect that the density of the extracted fumes or the extracted atmosphere containing the rising fumes also depends on the ambient air pressure. The ambient air pressure can be measured, for example, by a pressure sensor in the extractor hood or cooking appliance, by an external pressure sensor and transmitted electronically, or obtained from weather forecasts.

[0033] The problem can also be solved by a range hood designed to at least partially carry out the process described above. The range hood can be designed analogously to the process, and vice versa, and offers the same advantages. For example, one embodiment of the range hood includes at least one exhaust duct to which at least one exhaust fan, driven by an electric motor, is assigned to generate a forced exhaust flow through the duct.

[0034] In a further development, the extractor hood can be designed to be permanently mounted above a cooktop. An extractor hood typically has an underside that collects the fumes rising from the cooktop, to which an extraction duct is connected, leading, for example, to the outside. The extraction fan can be positioned in the direction of airflow, for instance, in front of or within the extraction duct. The extractor hood can also be a so-called downdraft extractor, in which case it is designed to be installed in or next to the cooktop. As a downdraft extractor, it can be designed to be retractable. In a further development, it can have a snorkel that extends upwards for operation, drawing in the rising fumes from above and usually from the side.However, the table fan can also be a downdraft extractor, designed to draw the rising fumes diagonally downwards towards the opening of the extractor hood in the table or work surface (so-called "downdraft" extractor).

[0035] It is a further development requirement that the extractor hood has a control unit designed to control the electric motor of the extractor fan. It is a further development requirement that the control unit is also designed to control other functions of the extractor hood, such as a display, lighting, etc., if present, or to receive and, if applicable, process data from at least one measuring device or user interface.

[0036] One embodiment involves integrating at least one monitoring device ("monitoring device") into the extractor hood, which tracks, in particular monitors or determines, specifically measures, at least one operating parameter. This is particularly easy to implement and allows for a wide range of applications for the extractor hood. The at least one monitoring device can, for example, be a dedicated voltmeter, a dedicated ammeter, and / or a dedicated tachometer. A particularly advantageous further development is that the at least one monitoring device is integrated into the motor electronics. In the case of a controlled electric motor, the motor electronics can, for example, be its control electronics. This allows at least one monitoring device, which is already advantageously often present in motor control systems or control electronics, to be used for the present method.For example, in motor control systems, motor currents, coil voltages and speeds are often monitored and used as input variables or controlled variables for a control algorithm.

[0037] It is a further development that the extractor hood has a data processing unit that carries out the procedure. This advantageously enables the extractor hood itself to draw at least one conclusion autonomously. It is a further development that the data processing unit corresponds to the control unit, or that the control unit is configured to execute the procedure.

[0038] It is a further requirement that the extractor hood has at least one communication device configured to exchange data with at least one external device, such as a cooking appliance with a hob, a user device, and / or a network computer like a cloud computer or a dedicated network server. This at least one communication device can, for example, include a wired communication device such as an Ethernet module and / or a wireless communication device such as a Bluetooth and / or WLAN module. It is a further requirement that the extractor hood is configured to transmit at least one monitored operating parameter or feedback to a communicatively linked external device, such as the cooking appliance with a hob, etc.

[0039] One design feature is that the electric motor of the extractor fan is a speed-controlled, specifically variable-speed, electric motor. This allows for particularly precise adherence to a target speed. A further advantage is the ability to adjust the speed to user preferences or the amount of fumes. For example, the speed can be reduced when fumes are low to minimize fan noise.

[0040] One design feature is that the extractor fan's electric motor is a brushless DC motor (BLDC motor). A BLDC motor offers several advantages, such as speed control via motor electronics. This allows for precise speed adjustment and more efficient operation of the extractor fan. Another advantage is the efficient power transmission to the motor. This results in more consistent and therefore more powerful operation. Furthermore, the absence of friction from brushes means the motor heats up less and has a longer lifespan.

[0041] The problem is further solved by a system comprising a cooking appliance with a hob and a range hood as described above, wherein the range hood is designed to extract fumes rising from food being heat-treated on the hob. The system can be designed analogously to the range hood and / or the method, and vice versa, and offers the same advantages.

[0042] The cooking appliance can be a standalone cooktop or an appliance with an integrated cooktop, such as an oven / cooktop combination or range. The cooktop can be, for example, a gas cooktop, an induction cooktop, a cooktop with electric resistance heating elements (e.g., heating coils, tubular heating elements, etc.), or a halogen cooktop. The cooktop can be a glass-ceramic cooktop or a ceramic cooktop. The cooktop can have one or more individually controllable cooking zones.

[0043] It is a configuration in which the extractor hood is set up to transmit at least one monitored operating parameter to the communicatively linked cooking appliance, and the cooking appliance is set up to draw at least one conclusion about the at least one heat treatment process based on the transmitted at least one monitored operating parameter. The evaluation of the at least one monitored operating parameter, including drawing the at least one conclusion, is then consequently carried out in the cooking appliance (e.g., a range, cooktop, or oven electronics). This corresponds to the view that the extractor hood serves as a measuring device for the at least one operating parameter, while the "intelligence" for drawing the at least one conclusion is located in the cooking appliance (or a data-technically linked instance such as a user device like a smartphone or tablet PC, or in a cloud server, etc.).

[0044] It is a configuration in which the cooking appliance is set up to trigger at least one action based on at least one inference. This makes the method advantageously usable for improving the functionality of the cooking appliance.

[0045] It is a further development requirement that at least one action includes the output of a message to a user, e.g., a visual signal, an acoustic signal and / or a text or voice message such as "Water is boiling", "Cooking phase complete", "Attention: Food is burning", etc.

[0046] It is considered further training if at least one action involves changing or adjusting at least one operating parameter of the cooktop, for example, adjusting a cooking level. Thus, if the procedure determines that water has been brought to a sufficiently high boil, the cooking level can be reduced to save energy. For example, water for cooking potatoes can first be brought to a boil at the highest cooking level, e.g., "9," and then reduced to, for example, cooking level "6." The procedure can also determine if the amount of steam produced corresponds to a cooking level that is too high or too low, and the cooking level can then be automatically adjusted by the appliance. Adjusting at least one operating parameter of the cooktop can be particularly advantageous if the cooktop, or at least one cooking zone, is operated or can be operated using an automatic program.

[0047] The properties, features, and advantages of this invention described above, as well as the manner in which they are achieved, will become clearer and more readily understandable in connection with the following schematic description of an exemplary embodiment, which is explained in more detail in conjunction with the drawings. Fig. 1 shows a sectional side view sketch of a system 1, 3 with a cooking appliance 1 with a hob 2 and a range hood 3 permanently installed above the hob. The hob 2 or the associated cooking zone(s) (not shown) are controlled by means of an electronic cooking appliance control 4, e.g., by adjusting the cooking levels of the cooking zone(s), activating additional cooking zones, etc.

[0048] The extractor hood 3 has an extractor duct 5 that widens above the cooktop 2 and leads to the outside through a wall W. Fumes S rising from the cooktop 2, e.g., steam, can be drawn into the extractor duct 5 by means of at least one exhaust fan 6 and then discharged to the outside, as indicated by the thick arrows. The exhaust fan 6 typically has several blades 7, which are driven by an electric motor 8. The electric motor 8 is a brushless, variable-speed DC motor, which is set, in particular regulated, to a specific target speed D_s by means of motor electronics 9 (example shown here). In particular, the electric motor 8 can be set, in particular regulated, to one of several target speeds D_s. The motor electronics 9 can, in one variant, be controlled by a control unit 10 of the extractor hood 3, e.g.,by switching the exhaust fan 6 on or off and / or setting its target speed.

[0049] Furthermore, a temperature sensor 11 can be arranged in the extractor duct 5 to measure the air temperature T in the extractor duct 5. The extractor hood 3 can also have a communication module 12, such as an Ethernet, WLAN, and / or Bluetooth module. The communication module 12 can, in particular, be capable of exchanging data with a corresponding communication module 13 of the cooking appliance 1, which in turn is connected to the cooking appliance control unit 4.

[0050] It is assumed here that the motor electronics 9 not only regulate the electric motor 8 to a specific target speed D_s, but also determine the actual voltage U_i applied to the electric motor 8 and the current l_i impressed into the electric motor 8, in particular at a predefined measurement rate. The motor electronics 9 thus serves as a monitoring device for these electrical quantities. Alternatively or additionally, at least one dedicated measuring device can be used as a monitoring device.

[0051] In one variant, the applied actual voltage U_i can be predefined and is not measured. In another variant, U_i and l_i are only determined when the exhaust fan 6 is switched on. In a variant described in more detail here, specific values ​​of l_i and, if applicable, U_i are transmitted via communication module 12 to communication module 13, which forwards them to the cooking appliance control unit 4. In the cooking appliance control unit 4, l_i and, if applicable, U_i can be stored as a time series or as time series, e.g., in a data memory of the cooking appliance control unit 4.

[0052] It is now assumed that water is to be heated in a pot T on hob 2, for example, to cook food G such as potatoes or soup, to cook spaghetti, or to reduce sauce. When hob 2 is switched on, the extractor hood 3 is also switched on. The values ​​of l_i and, if applicable, U_i are then transmitted to the appliance control unit 4. The appliance control unit 4 evaluates the values ​​of l_i and, if applicable, U_i, in particular the electrical power curve P_i = (l_i • U_i). For example, reaching the boiling point in pot T can be detected by a noticeable increase in the applied power P_i and / or the deviation (P_i - P_n) from a normal power P_n without steam formation, since a significantly increased amount of steam is generated when the boiling point is reached. This is due to the fact that the extractor fan 6 requires more electrical power to maintain its target speed D_s when there is more steam formation.In this case, the at least one conclusion regarding the at least one heat treatment process therefore includes the conclusion that the boiling point has been reached.

[0053] However, additionally or alternatively, other curve characteristics can be used to evaluate the curve in order to draw at least one conclusion, for example, reaching a specific threshold, a plateau, a maximum slope, etc. In one variant, the actual curves of the applied power can be compared with power reference curves. This at least one conclusion can be drawn using an algorithm trained with artificial intelligence. In another variant, the actual curves and / or the power reference curves, and generally the transmitted values, can be evaluated depending on the also transmitted air temperature T. Thus, the at least one conclusion regarding the at least one heat treatment process can additionally be drawn based on the air temperature T measured in the area of ​​the extractor hood.Additionally or alternatively, actual curves and / or the performance reference curves, and generally the transmitted values, can be evaluated depending on the also transmitted target speed D_s. Therefore, it is a further development that reference curves, if used, are differentiated with respect to the air temperature T and / or the target speed D_s.

[0054] At least one action that can be triggered by recognizing boiling as an indication of the heat treatment process may include, for example: emitting a visual and / or acoustic signal, e.g., a beep; sending a message to a user terminal device (CE), especially a mobile one, e.g., a message "Water is boiling"; reducing the boiling level, especially depending on the rate of increase in steam development; starting a timer; etc.

[0055] At least one of the inferences can additionally include the detection of combustion, e.g., through a noticeable increase in steam development after a previous burn or even the cessation of steam development. At least one action that can be triggered by the detection of combustion can, for example, include: issuing a visual and / or audible warning signal, e.g., a loud and insistent beeping; sending a message to the user device (CE), e.g., a message "Caution: possible burning"; switching off the cooking zones; etc.

[0056] Of course, the present invention is not limited to the embodiment shown.

[0057] This allows the process to be carried out by the extractor hood's control unit instead of the cooking appliance's control unit. A feedback signal from the extractor hood's control unit can then be transmitted to the cooking appliance's control unit, for example, so that the cooking appliance's control unit can trigger at least one action.

[0058] For example, at least one conclusion can be drawn about the at least one heat treatment process based on the air pressure prevailing in the vicinity of the extractor hood.

[0059] Furthermore, the electrical power impressed into the electric motor 8 can be kept constant and the actual rotational speed, in particular the course of the actual rotational speed, can be evaluated to draw conclusions about the heat treatment process.

[0060] In general, "ein", "eine", etc. can be understood to mean singular or plural, especially in the sense of "at least one" or "one or more", etc., unless this is explicitly excluded, e.g. by the expression "exactly one", etc.

[0061] A numerical specification can also include exactly the specified number as well as a normal tolerance range, unless this is explicitly excluded.

[0062] Reference symbol list

[0063] 1 cooking appliance

[0064] 2 cooking zones

[0065] 3 extractor hoods

[0066] 4 Cooking appliance control

[0067] 5 Extractor duct

[0068] 6 exhaust fans

[0069] 7 wings

[0070] 8 Electric motor

[0071] 9 Engine electronics

[0072] 10 Control unit of the extractor hood

[0073] 11 Temperature sensor

[0074] 12 Communication module

[0075] 13 Communication module

[0076] CE User Device

[0077] D_s target speed l_i actual motor current

[0078] U_i Motor voltage

[0079] G Cooking food

[0080] S haze

[0081] T pot

[0082] W Wall

Claims

Patent claims 1. Method for operating a cooker hood (3) in which, when an electric motor (8) of an exhaust fan (6) is operated, at least one operating parameter (U_i, l_i, D_s) of the electric motor (8) is monitored and, depending on the at least one monitored operating parameter (U_i, l_i, D_s), at least one conclusion is drawn about at least one heat treatment process, the fumes (S) of which are extracted by the cooker hood (3).

2. Method according to claim 1, wherein the at least one operating parameter (U_i, l_i, D_s) comprises at least one electrical parameter (U_i, l_i) impressed into the electric motor (8), in particular electrical power, and / or a motor speed (D_s).

3. Method according to one of the preceding claims, wherein at least one inference is drawn about a heat treatment process from a course of the tracked operating parameter (U_i, l_i, D_s).

4. Method according to one of claims 2 to 3, wherein - the at least one electrical quantity (U_i, l_i) is tracked as the at least one operating quantity (U_i, l_i, D_s) as a function of the motor speed (D_s) or - the motor speed (D_s) is tracked as the at least one operating parameter (U_i, l_i, D_s) as a function of the at least one electrical parameter (U_i, l_i).

5. Method according to one of the preceding claims, wherein the at least one inference to a heat treatment process comprises an inference to the presence of at least one specific heat treatment phase and / or to a transition to at least one specific heat treatment phase.

6. Method according to one of the preceding claims, wherein the at least one inference comprises the detection of a burning or scorching.

7. Method according to one of the preceding claims, wherein the at least one conclusion regarding the at least one heat treatment process is additionally drawn on the basis of the air temperature (T) prevailing in the area of ​​the extractor hood (3).

8. Method according to one of the preceding claims, wherein the at least one conclusion regarding the at least one heat treatment process is additionally drawn on the basis of the air pressure prevailing in the vicinity of the extractor hood (3).

9. Extractor hood (3) configured to perform the method according to any of the preceding claims.

10. Extractor hood (3) according to claim 9, wherein at least one monitoring device (9) which tracks at least one operating parameter (U_i, l_i, D_s) is integrated into the extractor hood (3).

11. Extractor hood (3) according to one of claims 9 to 10, wherein the electric motor (8) of the extractor fan (6) is a brushless DC motor.

12. Extractor hood (3) according to one of claims 9 to 11, wherein the electric motor (8) of the extractor fan (6) is a speed-controlled, in particular speed-variable, electric motor (8).

13. System (1 , 3) ​​comprising a cooking appliance (1) with a hob (2) and a range hood (3) according to one of claims 8 to 12, wherein the range hood (3) is designed to extract vapor (S) rising from food (G) being heat-treated on the hob (2).

14. System (1 , 3) ​​according to claim 13, wherein the extractor hood (3) is configured to transmit the at least one tracked operating parameter (U_i, l_i, D_s) to the communicatively coupled cooking appliance (1) and the cooking appliance (1) is configured to draw at least one conclusion about the at least one heat treatment process on the basis of the transmitted at least one operating parameter (U_i, l_i, D_s).

15. System (1 , 3) ​​according to claim 14, wherein the cooking appliance (1) is configured to trigger at least one action based on the at least one inference.

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