EP4187161A1 - Vapour extraction device and method for operating - Google Patents

Abstract

Vapor extraction device (1) comprising a housing device (2), a vapor screen device (3) with a suction opening (4) and a blower device (5) in operative connection with the suction opening (4). The vapor deflector device (3) can be displaced between a lower end position (7) and an upper end position (8) by means of a displacement device (6), the vapor deflector device (3) in the lower end position (7) being essentially inside the housing device (2). and wherein the canopy device (4) is arranged in the upper end position (8) at least in sections outside the housing device (2). The displacement device (6) also includes a motor device (9), the motor device (9) including an integrated limit switch (10) for the lower end position (7) and an integrated limit switch (11) for the upper end position (8). In the method for operating such an extractor device (1), the vapor deflector device (3) is shifted from the lower end position (7) to the upper end position (8) by means of the shifting device (6) when the extractor hood (1) is switched on and when the extractor hood is switched off (1) from the upper end position (8) to a lower end position (7). The lower end position (7) is specified by the limit switch (10) and the upper end position (8) by the upper limit switch (11).

Description

The present invention relates to an extractor device, in particular a downdraft fan, comprising at least one housing device, at least one vapor screen device with at least one suction opening and at least one blower device in operative connection with the suction opening. The vapor deflector device can be displaced at least between a lower end position and an upper end position by means of at least one displacement device, with the vapor deflector device being arranged essentially inside the housing device in the lower end position and with the vapor deflector device being arranged at least in sections outside the housing device in the upper end position. The present invention also relates to a method for operating such a vapor extraction device.

Extractor hoods are often installed above or around a hob to extract the greasy vapors that rise during cooking, thus avoiding contamination of the kitchen elements and the development of unpleasant odors. For this purpose, the fatty vapors and the air that rise above a hob are typically sucked into an intake section by at least one fan, freed of fatty components and, depending on the design, also of moisture and/or odors and then, depending on the design of the extractor hood, fed to a circulating air and /or supplied with exhaust air operation.

Extractor hoods arranged around a hob are also called downdraft fans, not above a hob. Downdraft fans are generally used when there is no installation space above the hob or optical considerations speak against such an installation.

In order to achieve the most effective possible extraction of vapors in a downdraft fan, these often have at least one movable vapor screen that can be extended upwards when the downdraft fan is in operation, so that the suction opening for extracting vapors is provided at a higher level. When the extractor hood or the downdraft fan is not in use, the fume hood is then generally shifted into a rest position in which the fume hood is usually not or not significantly above the worktop or hob.

The EP 2 888 533 discloses, for example, an extractor hood which has an automatically movable fume hood and in which two switches are provided which switch off a motor used for the process when the fume hood has reached predetermined positions. For this purpose, the switches are accommodated on the housing of the extractor hood and are actuated by switching levers which are attached to the canopy. When the vapor deflector is extended or retracted, a switching lever actuates the corresponding switch for an extended or retracted position of the vapor deflector and thus switches off the motor. In principle, such systems function reliably. The disadvantage here, however, is the relatively high design effort.

It is therefore the object of the present invention to provide an extractor hood with a displaceable vapor screen, in which reliable and safe operation is ensured with less structural complexity.

This object is achieved by an extractor device having the features of claim 1 and by a method for operating an extractor device having the features of claim 7. Preferred developments of the invention are the subject matter of the dependent claims. Further advantages and features of the invention result from the exemplary embodiments.

The vapor extraction device according to the invention is designed in particular as a downdraft fan and comprises at least one housing device, at least one vapor screen device with at least one suction opening and at least one blower device in operative connection with the suction opening. The vapor deflector device can be displaced at least between a lower end position and an upper end position by means of at least one displacement device, with the vapor deflector device being arranged essentially inside the housing device in the lower end position and with the vapor deflector device being arranged at least in sections outside the housing device in the upper end position. The displacement device includes at least one motor device, the motor device including at least one integrated limit switch for the lower end position and at least one integrated limit switch for the upper end position.

The lower end position is in particular the rest position or a rest position of the vapor deflector device, particularly when the extractor hood is switched off. In this position, depending on the configuration, the vapor deflector device is preferably completely accommodated in the housing device, so that it cannot be seen.

The upper end position is in particular one or the operating position in which, for example, in the case of an extractor device set up as a downdraft fan, the vapor deflector device is extended upwards, so that the suction opening is arranged higher than in the rest position and in particular so far up that it rises appropriately Vapors can be extracted from cookware standing on a hob.

The integrated limit switches for the lower end position and the upper end position can preferably be provided as separate or as two separate limit switches. Depending on the configuration, however, the two limit switches can preferably also be provided in one assembly and in particular can also be provided by a limit switch which can define at least two stop points.

The travel distance between the end positions is preferably determined or specified by the specification of the motor used. Depending on the motor used, a certain maximum distance between the upper end position and the lower end position can be achieved by the motor. The end positions themselves are then recognized or specified by the respective integrated limit switch.

Preferably, the position of the vapor deflector device is detected, if such a device is provided, as a rule or during normal operation over a period of time. The displacement speed is known with the motor device, so that on the one hand the position of the vapor deflector device can be deduced from the course over time. In addition, depending on the configuration, the course over time can preferably also be converted into a distance, so that the distance covered by the vapor deflector device is also known or can be calculated.

Any suitable electric motor can preferably be used as the motor device. For example, a normal DC motor can be used, the running direction of which is set by an appropriate polarity, or a stepping motor or the like.

The extractor device according to the invention offers many advantages. A significant advantage is that the mechanical limit switches that are otherwise provided in the device or on the housing device or on the vapor deflector device are no longer required, since integrated limit switches are used in the motor device. In this way, a reliable movement of the vapor deflector device between the upper and lower end position can be made possible without a sometimes considerable assembly effort being necessary in order to position the otherwise customary additional mechanical limit switches in the device or on the vapor deflector.

The limit switches are preferably designed mechanically and/or electrically. This results in the advantages of mechanical and electrical limit switches as in other applications. An advantage of mechanical limit switches is that the end points usually cannot be lost, even in the event of a lengthy power failure. The advantage of electric limit switches is that the end points can also be readjusted directly on the limit switch, for example using a remote control, without having to readjust them.

At least one control device is particularly preferably provided. This control device is preferably operatively connected to the motor device and can preferably be included in the displacement device or also be designed separately. Such a control device can be provided, for example, by a printed circuit board with control electronics, which on the one hand provides a supply of electricity, but on the other hand can also control or regulate the motor device, for example via pulse width modulation (PWM). In particular, the control device checks setpoint and actual values and controls the motor accordingly.

In advantageous configurations, the control device and/or the motor device is suitable and designed to displace the vapor deflector device between the lower end position and the upper end position at different speeds. It is particularly preferred that suitability or training is provided such that a lower speed can be provided towards the end positions. The speed can be adjusted in particular by pulse width adjustment (PWA). Adjusting the speed, in particular towards the end positions, can be advantageous depending on the configuration. In order to reach the upper end position in particular, the extension speed of the vapor deflector device can be slowed down for optical reasons, so that the vapor deflector device stops in an appealing manner. For example, it can be provided that the speed is reduced for the last 4 seconds. Other times can also be appropriately provided here. In particular when retracting the vapor deflector device, the speed can also be reduced from a certain distance to the rest position or the lower end position in order to ensure particularly safe operation of the vapor extraction device. For example, retraction can be slowed down if the distance from the vapor deflector device to the lower end position is only 80 mm. Depending on the configuration, other distances can also be provided.

The control device and/or the motor device is/are preferably suitable and designed to detect at least one misalignment of the vapor deflector device. there is a misalignment of the vapor deflector device, in particular a stopped position of the vapor deflector device outside of the end positions. Such an erroneous stopping position can arise, for example, as a result of an error or also as a result of a power failure. If such a malfunction or an error or misalignment is detected, the extension and/or retraction of the vapor deflector device stops for safety reasons. If, for example, there is a further operation of the exhaust hood, for example a change in the blower level or a change in the status of a light, in advantageous configurations the fume hood device is always extended, regardless of the previous direction of travel. In this way, a safety function is preferably provided, which ensures particularly safe operation of the vapor extraction device. If the vapor deflector device should move out when the error occurs or when the incorrect position is reached, operation can be normal or at a safety-related reduced speed of z. B. less than 15 mm / s further out. If the hood has reached an incorrect position when it is being retracted, the vapor deflector device is preferably first fully extended again, ie up to the upper end position. This extension also preferably takes place at a safety-relevant reduced speed. The vapor deflector device is then retracted again, preferably in regular operation.

Particularly preferably, the control device and/or the motor device is suitable and designed to recognize at least one termination criterion and to stop the displacement of the vapor deflector device. A termination criterion is reached in particular when at least one value of an electrical variable of the motor device exceeds and/or falls below a predetermined desired value. In this case, in particular, permanent current monitoring is provided, which, for example, detects pinching when the vapor deflector device is retracted or objects are placed on it or the user is supported. If, for example, the current increases when it is extended, it can be concluded that a resistance is preventing the vapor deflector device from being extended. This can result, for example, from an object placed on the device or from the user leaning on the vapor screen device. A reduction in current can indicate missing components and a defect. No current flow suggests that the vapor deflector device is in an end position.

If a limit value is exceeded and thus a termination criterion is determined or recognized, the movement of the screen is preferably interrupted. The vapor deflector device then preferably moves a small distance in the opposite direction. As a precaution, depending on the configuration, a travel speed of less than 15 mm/s can then preferably be provided. Does the selected state fit after an error or a termination criterion does not correspond to the state of the vapor deflector device, a new synchronization can take place through the renewed selection by the user. The current is monitored in particular via safety-relevant software. Such software can preferably be integrated in a separate controller and in a separate controller part. In particular, if an error occurs in a chip, no further method is possible.

The method according to the invention for operating an extractor device is particularly suitable for operating a downdraft fan. In this case, in particular, an extractor device can be operated as described above. The fume hood device is shifted from a lower end position to the upper end position by means of a shifting device when the fume hood device is switched on, the fume hood device being shifted from an upper end position to a lower end position by means of the shifting device when the fume hood device is switched off. The lower end position is specified by at least one limit switch integrated in the motor device and the upper end position is specified by at least one limit switch integrated in the motor device.

The extractor hood is switched on in particular by changing the fan level and/or switching on the lighting. The fume extractor device is switched off in particular by the blower level and/or the lighting being switched off, depending on what was switched on beforehand. As soon as an end position is reached, the motor is preferably switched off.

The method according to the invention also offers the advantages that have already been described above for the extractor device according to the invention.

At least one control device is preferably provided, which monitors at least one electrical variable of the motor device. In particular, the current strength is monitored, with this being checked in particular continuously and preferably permanently. At least one control loop is preferably provided, which checks whether a predetermined current strength is present at the motor device or whether deviating current strengths are present, for example due to an error or incorrect operation. The monitoring is preferably carried out by safety-related software, which can be integrated in particular into the displacement device or can also be provided externally or separately.

At least one control device is particularly preferably provided, which monitors at least the travel time between the end positions. The control device provided here can be a separate control device or the control device that was previously described. The travel time between the end positions is preferably known, so that the position of the vapor deflector device can be determined over the course of engine operation over time. Since the travel time is known, this can preferably also be converted into a distance between the end positions. A change in the speed can preferably take place at a specific time before an end position or from a certain difference to an end position. Here, too, control loops can be provided which, by monitoring the travel time, can infer normal operation or faulty operation.

In expedient developments, the displacement speed of the vapor deflector device is changed towards at least one end position. Change is to be understood as meaning in particular adapting. For example, when moving out, a slower displacement speed can be provided a short time before the end position is reached, for example 4 seconds beforehand. This can be done for visual reasons in particular and make a so-called convenience function available. In this way it is achieved that a particularly harmonious extension with a slower running-in into the upper end position is made possible. When retracting, for example, from a distance of 80 mm before reaching the lower end position, the speed can be reduced to a safety-relevant speed of less than 15 mm/s in order to ensure particularly safe operation of the vapor extraction device. In this case, the speed of the vapor deflector device or the displacement speed can be changed, in particular, by pulse width modulation of the motor device.

The vapor deflector device is preferably stopped when at least one value of an electrical variable of the motor device meets at least one termination criterion. A termination criterion is met in particular when a determined value or a measured value falls below and/or exceeds a predetermined value. In this case, for example, the current intensity can be exceeded or not reached, or a predetermined time until an end position is reached can in particular be exceeded. If the current intensity increases, a resistance can be inferred, which indicates that the motor device has to exert an increased amount of force to extend the vapor deflector device. A reduction in the amperage can indicate missing component defects or the like. No current flow suggests that the vapor deflector device is probably staying in an end position.

The vapor deflector device particularly preferably moves back a predetermined distance in the opposite direction after being stopped by a termination criterion. This means back when retracting the canopy device that this again in the direction of moves to the upper end position. When the vapor deflector device is extended, backwards means that the vapor deflector device moves back a little in the direction of the lower end position after it has stopped.

In expedient developments, the position of the vapor deflector device is checked for an incorrect position. It can preferably z. B. be checked before moving the vapor deflector device whether the vapor deflector device is actually in an end position. If the vapor deflector device is not in an end position, a misalignment is detected. A misalignment can also be detected or is present when the vapor deflector device stops without being in an end position. This can happen in particular due to a power failure or an error.

Preferably, the setting of the vapor deflector device is compared with the actual state, with synchronization possibly being carried out by a new selection of settings by the user if the set parameters of the vapor deflector device do not match the actual state.

The vapor deflector device is preferably shifted into the upper end position after detecting a faulty position. This is preferably independent of the direction in which the vapor deflector device has previously moved. If the incorrect position is reached during operation of the extractor hood or when raising the vapor deflector device, operation can usually be continued normally as soon as the vapor deflector device is in the upper end position. Even if the fume hood device is in an incorrect position when the extractor hood is switched off or when the fume hood device is retracted, the upper end position is automatically moved to first.

The shifting to the upper end position is particularly preferably carried out at reduced speed after a faulty position has been detected. A safety-relevant speed of less than 15 mm/s can preferably be provided.

The vapor deflector device is particularly preferably shifted into the lower end position and optionally switched off after the upper end position has been reached. This is the case in particular if a misalignment was achieved or detected when retracting the vapor deflector. Depending on the design, the fume hood device can also be moved back to the lower end position after the fume hood device has been fully extended and the extractor hood can then be configured so that a user has to start the fume hood again if necessary.

Further advantages and features of the present invention result from the exemplary embodiments, which are explained below with reference to the enclosed figures.

Figur 1

eine rein schematische Darstellung eines Ausführungsbeispiels einer erfindungsgemäßen Dunstabzugseinrichtung in einer perspektivischen Ansicht;

Figur 2

zwei rein schematische Darstellungen eines Ausführungsbeispiels einer erfindungsgemäßen Dunstabzugseinrichtung in Schnittansichten von vorne;

Figur 3

ein rein schematisches Betriebsschema eines Ausführungsbeispiels einer erfindungsgemäßen Dunstabzugseinrichtung; und

Figur 4

eine Weiterführung des Betriebsschemas gemäß Figur 3.

In the figures show:

figure 1

a purely schematic representation of an embodiment of a vapor extraction device according to the invention in a perspective view;

figure 2

two purely schematic representations of an embodiment of a vapor extraction device according to the invention in sectional views from the front;

figure 3

a purely schematic operating scheme of an embodiment of a vapor extraction device according to the invention; and

figure 4

a continuation of the operating scheme according to figure 3 .

In figure 1 an extractor device 1 or extractor hood according to the invention is shown purely schematically, which is designed here as a downdraft fan 100 . The extractor device 1 or the downdraft fan 100 is provided behind a hob 200 in the exemplary embodiment shown here, with the extractor device 1 comprising a housing device 2 which is provided here essentially inside a furniture body 300 .

In addition to the housing device 2, the fume extractor device 1 comprises a fume hood device 3, which is provided such that it can be moved or shifted in order to optimally suck off fumes. A suction opening 4 is provided on the fume hood device 3 , via which rising fumes can be sucked into the fume extraction device 1 by means of a blower device 5 . When the vapor extraction device 1 is switched off, the fume hood device 3 is provided in a lower end position 8, in which the fume hood device 3 is located completely in the housing device 2 in the exemplary embodiment shown here. The extractor device 1 is then flush with the hob 200 or, depending on the design, with the worktop 400.

The blower device 5 is arranged inside the housing device 2 and is operatively connected to the suction opening 4 of the vapor deflector device 3. Depending on the design, air can be carried away as recirculated air mode and/or as exhaust air mode, with an air hose 18 is provided, which discharged the vapors cleaned within the extractor device 1 in an exhaust air operation from the kitchen.

To operate the vapor extraction device 1, an operating device 16 is provided on the vapor deflector device 3, via which the vapor extraction device 1 can be switched on and off in the exemplary embodiment shown. To turn on the fume extraction device 1, for example, a specific fan speed of the fan device 5 can be selected, or only the lighting device 17 can be turned on.

In figure 2 two frontal sectional views of a further exemplary embodiment of an extractor device 1 according to the invention or of a downdraft fan 100 are shown purely schematically. The vapor deflector device 3 is in the lower end position 7 in the left figure and in the upper end position 8 in the right figure. The vapor deflector device 3 is here in the lower end position 7 in a rest position 19 and in the upper end position 8 in an operating position 20 .

In order to shift the vapor deflector device 3 between the lower end position 7 and the upper end position 8 and vice versa, a shifting device 6 which comprises a motor device 9 is provided in the exemplary embodiment shown here. In the exemplary embodiment shown here, the vapor deflector device 3 can be displaced a defined distance between the lower end position 7 and the upper end position 8 by means of the motor device 9 .

In order to reach defined end positions 7, 8, the motor device 9 according to the invention comprises an integrated limit switch 10, which determines the lower end position 7, and an integrated limit switch 11, which defines the upper end position. In the embodiment shown here, two separate limit switches 10, 11 are provided. Depending on the design, the limit switches can also be provided in an assembly or as a single limit switch, which can define at least two end positions.

Furthermore, a control device 12 is provided, which in the exemplary embodiment shown here continuously checks the motor device 9 in order to conclude that the fume extraction device 1 is functioning correctly. For this purpose, in the exemplary embodiment shown here, the applied current intensity or the required current intensity is continuously monitored.

In figure 3 a purely schematic diagram is shown of how the vapor extraction device 1 according to the invention can be operated. When you turn on the Vapor extraction device 1, for example by selecting a blower level or by switching on the lighting device 17 by means of the control device 12, first checks whether the vapor deflector device 3 is in one of the end positions 7, 8. If this is not the case, an incorrect position 13 is detected by means of the control device 12 .

A misalignment 13 of the vapor deflector device 3 can be detected not only when the extractor device 1 is switched on, but also during operation. A faulty position can be detected here if the vapor deflector device 3 does not come to a standstill in an end position 7, 8 but in an intermediate position. This can happen, for example, if there is a power failure or a network interruption.

After detecting a misalignment 13 of the vapor deflector device 3, an error loop is run through, which figure 4 is described in detail.

If the vapor deflector device is in the lower end position 7 or in the upper end position 8, the normal operation of the extractor device 1 or the switching on and off of this can be carried out.

If the control device 12 recognizes that the vapor deflector device 3 is in the lower end position 7 and the vapor extraction device is switched on, the vapor deflector device 3 is moved by means of the motor device 9 .

For this purpose, the motor device in the exemplary embodiment shown here is operated at 100% power, so that the motor device 9 moves the vapor deflector device 3 from the lower end position 7 in the direction of the upper end position 8 at a displacement speed predetermined by the motor.

During the movement or relocation of the vapor deflector device 3, the control device 12 in the exemplary embodiment shown here continuously checks via a control loop whether the vapor extraction device 1 is functioning correctly.

For this purpose, it is checked whether specific target values of the extractor hood 1 or the motor device 9 are present or whether the actual value deviates from them. In the exemplary embodiment shown here, the current strength of the motor device 9 is checked in order to check whether a predetermined setpoint value is being maintained or is being exceeded or fallen below. The current intensities may fall below the target value, for example, because certain components of the vapor deflector device 3 have been removed, so that the vapor deflector device is lighter and can be extended more quickly. In addition, the remaining runtime RZ is checked to check whether a sufficiently fast extension the vapor deflector device is present. For example, if the current is 0 mA, it can be assumed that the vapor deflector device 3 is in an end position 7, 8 or that there is no current at the motor device 9. If the setpoint values do not match the actual values, a termination criterion 14 is recognized. The further procedure according to a termination criterion 14 is explained in more detail in figure 4 explained.

In the exemplary embodiment shown, it is checked during the movement of the vapor deflector device 3 how far it has already moved. Due to the specification of the motor device 9 used, the period of time is known which the motor device 9 requires in order to shift the vapor deflector device 3 from the lower end position 7 to the upper end position 8 and vice versa. This can also be used to draw conclusions about the distance or it can be converted into the distance.

Thus, towards the end of the displacement or towards the end position 8, the speed or the displacement speed can be adjusted. In the exemplary embodiment shown here, this is for purely visual reasons or provides what is known as a comfort function, by means of which a particularly attractive method of the vapor deflector device 3 is provided. Thus, the vapor deflector device 3 travels at maximum speed over most of the distance, with the vapor deflector device 3 slowing down towards the upper end position 18 so that the vapor deflector device 3 does not stop too abruptly when it reaches the upper end position 8 .

For this purpose, with a remaining time RZ to the upper end position 8 of about 4 seconds, the motor device 9 is only operated with 70% of the power, so that a slower process is achieved. Other services can also be used as required. Even during the process at reduced speed, a continuous check is carried out here to determine whether an abort criterion 14 is present.

If the upper end position 8 is reached, which is detected by the integrated limit switch 11, the motor device is switched off again.

Further to the right in the process diagram is shown what happens when the vapor deflector device is in the upper end position 8 and the extractor hood 1 is switched off. This can take place in that the lighting device 13 is switched off and/or the blower device 5 is switched off.

In this case, the motor device 9 in the exemplary embodiment shown here is again operated at 100% power, so that the vapor deflector device 3 is shifted from the upper end position 8 to the lower end position 7 at maximum speed.

Here, too, the traveled distance or the position of the vapor deflector device 3 between the upper end position 8 and the lower end position 7 is checked, so that in the exemplary embodiment shown, from a distance or a residual path RW of approx. 80 millimeters to the lower end position 7 the displacement speed can be adjusted. In this case, less than 15 mm/s is set as the reduced speed G, so that the last 80 mm of the displacement path of the vapor deflector device 3 are carried out at a safety-relevant speed.

Here too, as when the vapor deflector device is extended, it is checked whether specific setpoint values of the motor device 9 match the actual values. If this is not the case, a termination criterion 15 is recognized.

In figure 4 is shown purely schematically which method steps are provided when a misalignment 13 or a termination criterion 14 or a termination criterion 15 is detected.

If a misalignment 13 is detected, it is first checked whether the extractor hood 1 or the blower device 5 or the blower device 5 or the lighting device 17 are switched on or off.

Then, as soon as this is possible again, the vapor deflector device 3 is moved to the upper end position 8 at a safety-relevant speed of less than 15 mm/s, regardless of the previous state of the vapor extraction device 1 .

The vapor deflector device 3 is then either shifted to the lower end position 7 in all cases during normal operation, or a status check is carried out to find out whether the vapor extraction device is actually switched on or off.

Here, the current state of the vapor extraction device 1 or the vapor screen device 3 and the set parameters are preferably checked. If these fall apart, it may be necessary or provided, depending on the configuration, for a user to carry out synchronization by making a new selection, so that the setpoint values again match the actual values.

When a termination criterion 14 or a termination criterion 15 is recognized, the control loop that is provided for an incorrect position 13 also occurs. For this purpose, the vapor deflector device 3 is first shifted into the upper end position 8, as described above, with a safety-relevant speed of less than 15 mm/s being maintained here as well.

Depending on the design, a further step can be provided before the vapor deflector device 3 is extended into the upper end position 8 . In this case, in the exemplary embodiment shown provided that upon detection of a termination criterion 14 and upon detection of a termination criterion 15, the vapor deflector device 3 is first stopped.

In the case of termination criterion 14, which takes effect when the vapor deflector device 3 is extended from the lower end position to the upper end position 8, it is provided that the vapor deflector device 3 is moved back a predetermined distance, i.e. in the direction of the lower end position 7. A distance of a few millimeters up to a few centimeters can be provided. In the embodiment shown, 3 mm are provided.

At termination criterion 15, which takes effect when the vapor deflector device 8 is displaced from the upper end position 8 to the lower end position 7, the vapor deflector device is extended again a predetermined distance in the opposite direction.

Reference List

1

extractor device

2

housing facility

3

vapor screen device

4

intake port

5

fan device

6

relocation facility

7

lower end position

8th

upper end position

9

engine setup

10

limit switch

11

limit switch

12

control device

13

misalignment

14

termination criterion

15

termination criterion

16

operating device

17

lighting device

18

air hose

19

rest position

20

operating position

RZ

remaining time

RW

distance to go

G

speed

100

downdraft fan

200

hob

300

furniture body

400

countertop

Claims (15)

Vapor extraction device (1), in particular downdraft fan (100), comprising at least one housing device (2), at least one vapor screen device (3) with at least one suction opening (4) and at least one blower device (5) in operative connection with the suction opening (4), the Vapor deflector device (3) can be displaced at least between a lower end position (7) and an upper end position (8) by means of at least one displacement device (6), the vapor deflector device (3) in the lower end position (7) being essentially inside the housing device (2) and wherein the vapor deflector device (4) is arranged at least in sections outside the housing device (2) in the upper end position (8),
characterized,
that the displacement device (6) comprises at least one motor device (9), the motor device (9) comprising at least one integrated limit switch (10) for the lower end position (7) and at least one integrated limit switch (11) for the upper end position (8). . Vapor extraction device (1) according to one of the preceding claims, characterized in that at least one control device (12) is provided. Vapor extraction device (1) according to one of the preceding claims, characterized in that the control device (12) and/or the motor device (11) is suitable and designed to move the vapor deflector device (3) at different speeds between the lower end position (7) and the upper end position To shift end position (8). Fume extractor device (1) according to one of the preceding claims, characterized in that the control device (12) and/or the motor device (9) is suitable and designed to detect at least one incorrect position (13) of the fume hood. Vapor extraction device (1) according to one of the preceding claims, characterized in that the control device (12) and/or the motor device (9) is suitable and designed to recognize at least one termination criterion (14, 15) and to move the vapor screen device (3 ) to stop. Method for operating an extractor device (1), in particular a downdraft fan (100) according to any one of the preceding claims, wherein a fume shield device (3) when switching on the extractor hood (1) by means of a Shifting device (6) is shifted from a lower end position (7) to an upper end position (8), the vapor shield device (3) being shifted from an upper end position (8) to a lower end position when the extractor hood (1) is switched off by means of the shifting device (6). (7) is relocated,
characterized,
that the lower end position (7) is specified by at least one limit switch (10) integrated in the motor device (9) and that the upper end position (8) is specified by at least one limit switch (11) integrated in the motor device (9). Method according to the preceding claim, characterized in that at least one control device (12) is provided, which monitors at least one electrical variable of the motor device (9). Method according to one of the two preceding claims, characterized in that at least one control device (12) is provided which monitors at least the travel time between the end positions (7, 8). Method according to one of the three preceding claims, characterized in that the displacement speed of the vapor screen device is changed towards at least one end position (7, 8). Method according to one of the four preceding claims, characterized in that the vapor deflector device (3) is stopped when at least one value of an electrical variable of the motor device (9) meets at least one termination criterion (14, 15). Method according to one of the five preceding claims, characterized in that the vapor screen device (3) moves back a predetermined distance in the opposite direction after stopping. Method according to one of the six preceding claims, characterized in that the position of the vapor screen device (3) is checked for an incorrect position (13). Method according to the preceding claim, characterized in that the vapor deflector device (3) is shifted into the upper end position (8) after a faulty position (13) has been detected. Method according to the preceding claim, characterized in that the shifting into the upper end position (8) takes place at reduced speed after a faulty position (13) has been detected. Method according to one of the two preceding claims, characterized in that after reaching the upper end position (8) the vapor screen device (3) is shifted to the lower end position (7) and optionally switched off.

Images