EP2971976A1 - Hotte aspirante - Google Patents

Hotte aspirante

Info

Publication number
EP2971976A1
EP2971976A1 EP14705542.0A EP14705542A EP2971976A1 EP 2971976 A1 EP2971976 A1 EP 2971976A1 EP 14705542 A EP14705542 A EP 14705542A EP 2971976 A1 EP2971976 A1 EP 2971976A1
Authority
EP
European Patent Office
Prior art keywords
torque
characteristic
extractor hood
speed
pressure difference
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14705542.0A
Other languages
German (de)
English (en)
Other versions
EP2971976B1 (fr
Inventor
Martin Graw
Rainer Lessmeier
Gert Meinhardt
Daniel Metz
Peter Schlotmann
Markus Wössner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL14705542T priority Critical patent/PL2971976T3/pl
Publication of EP2971976A1 publication Critical patent/EP2971976A1/fr
Application granted granted Critical
Publication of EP2971976B1 publication Critical patent/EP2971976B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed

Definitions

  • the present invention relates to an extractor hood.
  • blower motors in the form of asynchronous motors were mainly used in the past due to their cost-effective design.
  • the asynchronous motors are usually designed as a capacitor or gap motors.
  • the power control is via winding taps or a phase control.
  • the torque-speed characteristic is predetermined by their design and therefore can only be changed to a limited extent.
  • Extractor hoods can be used in kitchens as exhaust or recirculation units.
  • the hood When used as an exhaust air device, the hood is connected to a piping at the customer, which leads the filtered from the hood air from the kitchen out.
  • the extractor hood In recirculation mode, on the other hand, the extractor hood is directly connected to the air volume of the kitchen interior, ie without any intermediate circuit of a piping.
  • An intersection of the system characteristic curve with a delivery volume-pressure difference characteristic of the extractor hood results in the operating point of the extractor hood.
  • the operating point means that delivery volume and that pressure difference, which or which sets in the operation of the hood.
  • the delivery volume-pressure difference characteristic is in a fixed relationship with the torque-speed characteristic of the induction motor. Since now the torque-speed characteristic of an asynchronous motor is specified, so the delivery volume-pressure difference curve of the cooker hood is determined accordingly.
  • An object of the present invention is to provide an improved extractor hood. Accordingly, an extractor hood with an electronically commutated blower motor and a control device is provided. The control device is configured to connect the blower motor with a first or a second torque / speed ratio. To drive characteristic, wherein the torque-speed characteristics have at least one common point.
  • the blower motor is thus designed as an electronically commutated synchronous motor, which is operated with direct current.
  • Other designations for such motors are BLDC (brushless DC motor) or EC motor (electronically commutated motor).
  • the present blower motor has a high flexibility in terms of its control options.
  • the controller may include software that defines the first and second torque-speed characteristics.
  • the torque-speed characteristics may be stored on a memory of the control device.
  • the torque-speed characteristics can be stored in the form of value tables.
  • the control device can be provided, for example, in the form of a computer device, in particular as a microprocessor.
  • the torque-speed characteristics in a first area (in at least one point) an identical torque-speed value pair or an identical course and in a second Range have a different torque-speed value pair or a different course.
  • the first torque-speed characteristic may be associated with a normal mode of a first operator-selectable stage of the cooker hood.
  • the second torque-speed characteristic may be associated with a power mode of the hood in the first stage of operation.
  • the power mode can correspond to an operation of the hood in which the delivery volume is increased compared to the normal mode.
  • the extractor hood has, for example, an improved extraction in each of four operating stages compared to a respective normal mode. This is enough to satisfy the customer, who attaches importance to a very quick cleaning of the kitchen air during cooking or regularly prepares dishes that produce a lot of steam. Or, however, it is represented for example by means of the second torque-speed characteristic, an eco-mode in which the extractor hood in For example, each of its four operating levels causes less noise than a respective normal mode.
  • the eco mode can be selected by a sound-sensitive customer.
  • the proposed extractor hood thus has a high degree of flexibility and, as far as its delivery volume-pressure difference characteristic curve is concerned, can be adapted individually to customer requirements or other basic conditions, for example a system characteristic curve.
  • the control device is configured to control the blower motor with a third torque-speed characteristic, the first and the third torque-speed characteristic having at least one common point.
  • the first torque-speed characteristic correspond to a normal mode of a first stage of operation of the hood.
  • the second torque-speed characteristic may correspond to the aforementioned power mode of the first operation stage and the third torque-speed characteristic to the aforementioned Eco mode of the first operation stage.
  • the control device is adapted to control the fan motor with a fourth torque-speed characteristic.
  • the fourth torque-speed characteristic has no common point with the first, second and / or third torque-speed characteristic.
  • the fourth torque-speed curve for example, corresponds to a normal mode of a second stage of the extractor hood.
  • the fourth torque-speed characteristic differs from the first torque-speed characteristic in that a respective different torque is provided over the entire speed range.
  • the first, second, third and / or fourth torque-speed characteristic curve has an asynchronous characteristic.
  • An asynchronous characteristic is characterized by the fact that at a greater air resistance, so for example at a longer tubing at the customer, the torque of the fan motor is reduced and the speed of the fan motor increases accordingly. This effect has the advantage that the extractor hood becomes more pressure-stable.
  • the control device controls the fan motor in such a way that a delivery volume conveyed through the extractor hood and a casing connected downstream of any downstream of the extractor hood remains the same with greater air resistance.
  • the asynchronous characteristic has a tightening torque, a saddle torque, a tilting moment and / or a rated speed.
  • the asynchronous characteristic thus corresponds in principle to a torque-speed characteristic which corresponds to the shape of a horizontal "S."
  • the asynchronous characteristic of the torque / rotational speed characteristic comprises a valley which has followed a mountain in the direction of increasing speed As torque approaches the rated speed, the torque decreases asymptotically to zero.
  • the first, second and / or third torque-speed curve have the same tightening torque, the same caliper torque and / or the same rated rotational speed and a different tilting moment.
  • the second and third torque-rotational speed characteristic therefore deviate at least in sections from the first torque-rotational speed characteristic in the region of the overturning moment. In the working range of the fan motor, which extends from shortly before the overturning moment up to the rated speed, a different course thus results for the first, second and third torque-speed characteristic curve.
  • the first and fourth torque-rotational speed characteristic curve differ from one another with regard to their tightening torque and / or fifth wheel torque.
  • the first torque-speed characteristic may be assigned to a normal mode of a first operating stage and the fourth torque-rpm characteristic to a normal mode of a second operating stage of the extractor hood.
  • the fourth torque-rotational speed characteristic is shifted parallel to the first torque-rotational speed characteristic.
  • a first delivery volume / pressure difference characteristic, the second torque / speed characteristic a second delivery volume / pressure difference characteristic, the third torque / speed characteristic a third delivery volume Pressure difference characteristic and / or the fourth torque-speed characteristic associated with a fourth displacement volume pressure difference characteristic.
  • the delivery volume is the volume of air (including any vapor), which is conveyed per unit time through the extractor hood and any associated with this piping by means of the fan motor.
  • the pressure difference in this case means the pressure difference with which the fan motor acts on the air volume.
  • the pressure difference can be measured, for example, between an air outlet of the extractor hood and an environment of the extractor hood.
  • the pressure difference can be measured on the outlet side as a static pressure difference in a pressure chamber.
  • the delivery volume can be measured by means of a venturi downstream of the pressure chamber.
  • blower motor is activated only as a function of, for example, the first torque / speed characteristic curve
  • a delivery volume arises depending on an internal resistance of the extractor hood (in recirculation mode) or additionally on a resistance of a piping connected to the extractor hood (in exhaust air mode) a pressure difference.
  • This pair of values corresponds to an operating point of the fan motor which is also referred to herein as an operating point.
  • This working point is based on the first displacement-pressure difference characteristic curve.
  • This operating point also corresponds exactly to a value pair of the first torque-speed characteristic curve.
  • the first, second and / or fourth delivery volume-pressure difference characteristic has an at least partially convex course and the third delivery volume-pressure difference characteristic has an at least sectionally concave profile.
  • the second delivery volume-pressure difference characteristic corresponds to a power mode and the third delivery volume-pressure difference characteristic corresponds to an Eco mode of the extractor hood.
  • a system characteristic curve of the extractor hood if appropriate in conjunction with a piping, can describe the pressure difference as a function of the volumetric flow through the extractor hood and, if appropriate, the piping.
  • This system characteristic can have a convex, in particular parabolic course.
  • the operating point is shifted along the system characteristic curve.
  • a suction power of the hood can be increased (power mode), or it can unwanted noise of the hood can be reduced (Eco mode).
  • the pressure difference of the second displacement-pressure difference characteristic curve for each delivery volume is greater than or equal to the pressure difference of the first delivery volume-pressure difference characteristic curve. Additionally or alternatively, the pressure difference of the third delivery volume-pressure difference characteristic for each delivery volume is less than or equal to the pressure difference of the first delivery volume-pressure difference characteristic.
  • the second delivery volume pressure difference characteristic curve is particularly suitable, a power mode of the extractor hood and the third delivery volume pressure difference characteristic line particularly suitable to represent an eco-mode of the hood.
  • the fourth delivery volume-pressure difference characteristic is shifted parallel to the first delivery volume-pressure difference characteristic.
  • a boost mode of the extractor hood can be provided.
  • the control device is set up to control the fan motor as a function of the first or second (or fourth) torque-speed characteristic in dependence on a timer (timer).
  • timer timer
  • the control device first of all activates the blower motor as a function of the first torque / rotational speed characteristic curve.
  • the controller controls the fan motor with the fourth (or second) torque-speed curve.
  • the control device controls the fan motor again as a function of the first torque-speed characteristic curve.
  • control device is set up to determine whether the extractor hood is in its intended use in a recirculation or exhaust air operation.
  • the control device is further configured to control the blower motor with the first, second or third torque / rotational speed characteristic as a function of the result of this determination.
  • the control device can now continue to be set up in such a way that it activates the blower motor with the second torque / rotational speed characteristic in the exhaust air mode, which corresponds, for example, to a power mode. Since in this case, so if a piping is present, a larger capacity is needed, this may be desirable for a customer. In the same way, if a recirculation mode is detected, that is, no piping is present, the fan motor can be controlled with the third torque / speed characteristic, that is, for example, an Eco mode. In recirculation mode due to the lack of piping only a lower flow rate is required to sufficiently suck the hotplate.
  • the control device is adapted to recognize the intended use of the extractor hood, whether a saturation of a filter occurred or a clogging of a connected to the extractor casing piping is present.
  • the control device is further configured to control the blower motor with the first, second or third torque-speed curve as a function of this.
  • the control device may be configured to detect a change in the mentioned operating point over time. As described above, the operating point for a specific installation situation and hood is fixed. However, this may change over time, for example, due to filter saturation or clogging. This can then be detected by the control device. If, for example, a filter saturation is detected, the control device can automatically move from the first torque / rotational speed characteristic to the second torque Change ment speed characteristic, so for example, the power mode, so as to compensate for the loss of delivery volume.
  • the control device is adapted to control the fan motor in response to a determined system characteristic with the first, second, third or another torque-speed characteristic.
  • a boost, eco or power mode can be configured differently.
  • the control device is adapted to control the fan motor in response to a user input with the first, second, third or fourth (or another) torque-speed characteristic.
  • the extractor hood can for this purpose have an input device, in particular in the form of a touch screen, one or more switches and / or one or more buttons. The user may then select the first, second, third, or fourth (or more) torque-speed characteristics as desired.
  • the user may switch between the first and fourth torque-speed characteristics, which correspond to a normal mode of a first and second operating stage of the hood. Furthermore, starting from the normal mode, the user can select, for example, a power mode, an eco mode and / or a boost mode from the first operating stage.
  • the extractor hood may have a display device which is adapted to indicate whether the control device controls the fan motor with the first, second, third or fourth (or a further) torque-rotational speed characteristic.
  • the display device can be designed as a screen, in particular TFT screen and / or touchscreen.
  • the display device can be set up to display the current delivery volume flow, for example in the form of cubic meters per hour.
  • the display device may be configured to indicate to the operator whether the extractor hood is in the first, second, third or another operating stage.
  • the indicator may be configured to indicate whether the hood is in the aforementioned power mode, eco mode, or boost mode.
  • the second and / or third torque-speed characteristic is selected to avoid unwanted resonances in a proper use of the extractor hood. Through tests, in particular by connecting the extractor hood with different piping, it can be determined for which torque-speed value pairs results in an unwanted resonance.
  • control device can bypass these unwanted operating points automatically, by controlling the fan motor for a specific speed range as a function of the second or third torque-speed characteristic curve.
  • This behavior can also be stored on a memory of the control device.
  • the extractor hood is preferably designed as a household appliance.
  • a (further) extractor hood with an electronically commutated fan motor and a control device is provided.
  • the control device is set up to control the fan motor with a first, second or third torque-speed characteristic.
  • the first and third torque-speed characteristics are each selectable by an operator by means of an input device.
  • the control device is further configured to control the blower motor based on a parameter determined by the latter, starting from the first or third torque / speed characteristic curve with the second torque / speed characteristic curve.
  • an operator person can switch the extractor hood between a first operating stage (first torque / rotational speed characteristic) and a second operating stage (second torque / rotational speed characteristic), for example by pressing a button.
  • the switching from the first torque-speed characteristics to the second torque-speed characteristic then makes the control device in particular self-acting in order to take into account certain boundary conditions, for example a currently present system characteristic curve or an operator request for fewer noises or more delivery volumes .
  • the frame condition or the operator request can each form the parameter determined by the control device. For example, a boost, power or eco mode of the hood can be provided.
  • the user request can be communicated to the control device by an input device of the extractor hood.
  • the first and second torque Speed characteristic may have an asynchronous characteristic and / or be parallel to each other.
  • the third torque-speed characteristic may lie between and / or be parallel to the first and second torque-speed characteristics.
  • the third torque-speed characteristic may have at least one common point with the first torque-speed characteristic and / or an asynchronous characteristic.
  • a cooker hood assembly is provided with a casing and a previously described hood.
  • the piping runs, for example, in or on a building.
  • the extractor hood is coupled with the piping to conduct air.
  • a method for operating an extractor hood is provided. In the method, an electronically commutated fan motor with a first or a second torque-speed characteristic is controlled by means of a control device, wherein the torque-speed characteristics have at least one common point.
  • a (further) method for operating an extractor hood is provided.
  • an electronically commutated fan motor with a first, second or third torque-speed characteristic is controlled by means of a control device.
  • the first or third torque-rotational speed characteristic curve is selected by means of an input device by an operator.
  • the blower motor is driven in response to a determined by the controller parameters based on the selected first or third torque-speed curve with the second torque-speed curve.
  • FIG. 1 shows schematically an extractor hood arrangement according to an embodiment
  • Fig. 2 torque-speed characteristics according to an embodiment
  • FIG. 3 Delivery volume-pressure difference characteristic curves and system characteristics according to an embodiment
  • FIG. 4 shows delivery-volume-pressure difference characteristic curves for a power and eco mode according to an embodiment
  • FIG. 5 delivery volume-pressure difference characteristic curves for a recirculation and exhaust air operation according to an embodiment
  • FIG. 6 shows displacement-pressure differential curves for avoiding resonance according to an embodiment
  • FIG. 7 shows delivery-volume-pressure difference characteristics for a boost mode according to an embodiment
  • FIG. 8 Delivery volume-pressure difference characteristic curves for a boost, power and eco mode according to a further embodiment.
  • FIG. 1 schematically shows an extractor hood arrangement 1 according to one embodiment.
  • the extractor hood assembly 1 comprises an extractor hood 2, which is arranged above a cooking point 3 in a kitchen.
  • the extractor hood 2 can for example be designed as a hood or dining.
  • the extractor hood 2 can this - as well as a casing 4 - be attached to a building wall 5 of the kitchen.
  • the extractor hood 2 conveys vapor 6 from above the cooking point 3 via an air inlet 7 to an air outlet 11 of the same.
  • the air outlet 1 1 is air-conductively connected via the piping 4 with the environment outside the kitchen.
  • the extractor hood - as will be explained in more detail later - be provided as a recirculation unit, wherein the air outlet 1 1 is air-conductively connected to the interior 10 of the kitchen.
  • the extractor hood 2 comprises a fan wheel 13.
  • the fan wheel 13 will be driven by an electronically commutated fan motor 14.
  • the fan 13 forms with a surrounding spiral housing 15, a radial fan 16, which sucks the vapor 6 through a grease filter 12 in the region of the air inlet 7 and expels through the air outlet 1 1.
  • the radial fan 16 must overcome the internal air resistance of the extractor hood 2, which arises in particular due to the radial fan 16 itself and an internal casing 17.
  • the radial fan 16 must overcome the air resistance of the casing 4 (if present) to convey the air outside the interior 10 of the kitchen.
  • the internal air resistance of the extractor hood 2 gives a plant characteristic of the same in recirculation mode.
  • the extractor hood 2 comprises a control device 21, which controls the fan motor 14.
  • the control device is designed for example as a microprocessor and comprises a memory 22.
  • On the memory 22 are shown in the form of software shown in Figure 2 torque-speed characteristics.
  • Figure 2 shows a first torque-speed curve DK1, a second torque-speed curve DK1 a, a third torque-speed curve DK1 b, a fourth torque-speed curve DK2, and a fifth torque-speed curve DK3 ,
  • the torque M of the blower motor 14 is shown as a function of its speed n.
  • the torque-speed characteristics DK1 to DK3 each have an asynchronous characteristic. This means that their shape corresponds to a horizontal "S.” This also means that each of the torque / rotational speed curves DK1 to DK3 has a tightening torque M A1 , M A2 , M A3 , a saddle moment M S , M S 2, M S 3, a tilting moment M K i, M K i a , M K Ib, K 2, M K 3 and a nominal speed n N.
  • the tightening torque M A1 , M A2 , M A3 corresponds to the torque of the fan motor 14 at Starting from the tightening torque M A1 , M A2 , M A3 , the torque decreases until the fifth wheel torque M S i, M S 2, M S 3 increases with increasing speed n and thereafter rises again, and reaches its maximum M K i, M K ia, M K -ib, M K 2, M K 3. Thereafter, the torque M decreases again and asymptotically approaches zero towards the rated speed n N.
  • a working range in which the fan motor 14 typically is controlled by the control device 21 during operation of the extractor hood 2 is designated by AH
  • the torque-speed characteristics DK1, DK1 a, DK1 b have a section ttvati identical course.
  • the tightening torque and the saddle torque M A1 , M S i are identical for the torque-rotational speed characteristics DK1 to DK1b.
  • the torque-rotational speed characteristic curve DK2 runs parallel to the torque-rotational speed characteristic curve DK1 and is shifted upward with respect to this, that is to say characterized by a higher torque M. Consequently, the overturning moment M K 2 lies above M K ia, M K i and M K ib-
  • the torque-rotational speed characteristic DK3 also runs parallel to the torque-rotational speed characteristic DK1 and between this and the torque-rotational speed characteristic DK2 ,
  • the torque-rotational speed characteristic DK1 is associated, for example, with a normal mode of a first operating stage of the extractor hood 2 and the torque / rotational speed characteristic DK2 is assigned to a normal mode of a second operating stage of the extractor hood 2. It is also possible to provide further operating stages, for example a third and a fourth operating stage, which are shown in FIG. Of course, an off-state of the hood or the blower motor 14 is provided. For example, as shown in FIG.
  • the extractor hood 2 may comprise buttons 23 by means of which the off state "0" and the first to fourth operation steps “1", “2", “3", “4" can be selected
  • the control device 21 does not control the blower motor 14 (off state) or with the first torque / speed characteristic DK1 (first operation stage) or the fourth torque / speed characteristic DK2 (second operation stage) or another Torque-speed characteristic (third and fourth operating stage) .
  • another input device could be provided.
  • the second torque-rotational speed characteristic DK1 a corresponds for example to a power mode and the third torque-rotational speed characteristic DK1 b to an eco mode, as will be explained in more detail below.
  • an operator can remove the extractor hood 2 by actuating an input device, for example in the form of a button 24 from the normal mode corresponding to the first torque Switch characteristic DK1 into the power mode according to the torque / rotational speed characteristic DK1 a or the eco mode according to the torque / speed characteristic DK1 b
  • an input device for example in the form of a button 24 from the normal mode corresponding to the first torque Switch characteristic DK1 into the power mode according to the torque / rotational speed characteristic DK1 a or the eco mode according to the torque / speed characteristic DK1 b
  • Switching to the Eco and Power mode can also be performed when the extractor hood 2 is operated in the normal mode of the second, third or fourth operation stage "2""3""4."
  • the torque-speed characteristics DK2a and DK2b illustrate by way of example the power or eco mode assigned to the second operating stage "2".
  • the tilting moment M K2a is then above the tilting moment M K 2 and the tilting moment M K 2b below the tilting moment M K 2-
  • the extractor hood 2 may include a display device, for example in the form of a TFT screen 25, on which is displayed in which operating stage, the hood 2 is located. Further, the TFT screen 25 may indicate whether the hood 2 is in the normal mode, the power mode or the eco mode. Still further, the TFT screen 25 can display a conveyance volume currently conveyed by the extractor hood 2, for example in cubic meters per hour. The TFT screen 25 can be controlled by the control device 21 accordingly.
  • the input devices 23, 24 could also be integrated in the display device 25, for example by being designed as a touchscreen, which at the same time is also input device for user commands.
  • FIG. 3 shows the pressure difference p as a function of the delivery volume Q.
  • the pressure difference p denotes a pressure difference between the ambient pressure in the kitchen interior 10 (see FIG. 1) and a pressure which is measured, for example, in the air outlet 1 1 of the extractor hood 2.
  • the delivery volume Q means a volume of air delivered per unit time, for example in cubic meters per hour.
  • Each of the torque-speed characteristics of Figure 2 is associated with a delivery volume pressure difference characteristic in Figure 3.
  • a delivery volume pressure difference characteristic corresponds to the torque-speed characteristic DK1 of the delivery volume-pressure difference characteristic FK1 and the torque-speed characteristic DK2 of the delivery volume-pressure difference characteristic FK2.
  • the corresponding to the delivery volume-pressure difference characteristics FK3 and FK4 Torque-speed characteristics are not shown in Figure 2.
  • Each pair of values of a respective torque-speed characteristic of Figure 2 has a correspondence on a respective delivery volume-pressure difference characteristic of Figure 3.
  • the extractor hood 2 is operated as a circulating air unit and the first operating level "1" is selected in normal mode and thus the first delivery volume-pressure difference characteristic FK1 by means of a knob 23, an operating point AP1 results, at which the extractor hood 2 operates.
  • the operating point AP1 is an intersection between the delivery volume-pressure difference characteristic FK1 and the system characteristic AK1
  • the system characteristic AK2 can represent a casing 4 with a first length and the system characteristic AK3 a casing 4 with a second length, the second length being greater than the first length and, correspondingly, the aerodynamic drag being higher.
  • the operating points AP1, AP2, AP3 and AP4 are obtained by switching between the operating stages "1" to "4" in the normal mode, see FIG. 2. It can be provided that in particular the delivery volume ranges shown in FIGS.
  • Pressure difference characteristics FK1 to FK4 are stored, for example in the form of a table on the memory 22 of the controller 21. Furthermore, in the table a respective delivery volume pressure difference value pair p, Q associated torque speed value pairs M, n be stored.
  • the table can be stored on the memory 22, for example, in a manufacturing process of the extractor hood 2.
  • the table is generated by a test extractor hood with different delivery volumes Q and pressure differentials. zen p is operated.
  • the current torque and the respective current speed are written to the table.
  • the current torque and the current speed can be read out of the control device 21, for example. If the extractor hood 2 is now put into operation at the customer, then the control device 22 can close the delivery volume Q from the current torque M and the current rotational speed n and, as shown in FIG. 1, display this to the operator.
  • FIG. 4 now shows a selected displacement-pressure difference characteristic curve FK1. As in FIG. 3, the pressure difference p is plotted as a function of the delivery volume Q.
  • the delivery volume-pressure difference characteristic curve FK1 from FIG. 4 corresponds to the torque / rotational speed characteristic DK1 from FIG. 2.
  • a delivery volume / pressure difference characteristic FK1a corresponds to the torque / rotational speed characteristic DK1a and a delivery volume / pressure difference characteristic FK1b to the torque Speed characteristic DK1 b.
  • the delivery volume-pressure difference characteristic curve FK1, FK1a and FK1b each have different points of intersection with the system characteristic AK1 shown by way of example, and correspondingly so far in each case different value pairs p, Q. These operating points of the extractor hood 2 are with AP1, AP1 a and AP1 b denotes. It can be seen in FIG. 4 that the first and second displacement-pressure difference characteristic FK1, FK1a have a convex course and the third displacement-pressure difference characteristic FK1b has a concave profile.
  • FIG. 5 shows further displacement-pressure-difference characteristic curves, for example for the extractor hood 2 from FIG. 1.
  • a further torque-rotational speed characteristic can be stored, which the delivery volume pressure difference Characteristic FK1 c corresponds.
  • the control device 21 can be configured to recognize whether the extractor hood 2 is used in a recirculation or exhaust air operation. This can be accomplished, for example, by supplementing the above-mentioned table stored on the memory 22 in that certain value pairs p, Q are assigned to a recirculation mode and other pairs of values p, Q to an exhaust mode.
  • the value pairs p, Q can be assigned, for example, to a value range AB corresponding to an exhaust air operation and to a value range UB corresponding to a recirculation mode.
  • the control device 21 can then automatically decide, for example, that in the recirculation mode it operates the fan motor 14 with the torque / rotational speed characteristic DK1 corresponding to the delivery volume / pressure difference characteristic line FK1 and in the exhaust air mode the fan motor 14 with the delivery volume / pressure difference characteristic FK1 c corresponding torque-speed characteristic (not shown) drives.
  • the blower motor 14 automatically provides a higher pressure difference p in the exhaust air mode in which a house is designed to work against higher air resistance.
  • the controller 21 may decide, if it detects a shift of the operating points AP1 to AP4 (see FIG. 3) over time, that there is a blockage of the grease filter 12 or the piping 4. Accordingly, the control device 21 then the fan motor 14 in example, the first operating level "1" with the delivery volume-pressure difference characteristic FK1 c corresponding torque-speed curve - instead of the delivery volume-pressure difference curve FK1 corresponding torque-speed curve DK1 6 shows the case where resonances occur at an operating point APR This can be ascertained, for example, by testing the extractor hood 2 in connection with, for example, different pipings 4.
  • Fig. 7 illustrates the ability to provide a delivery volume-pressure difference characteristic FK1 e, which is parallel to the delivery volume-pressure difference characteristic FK1 shifted, for example, in the direction of increasing pressure difference p and an increasing delivery volume Q.
  • the controller 21 controls the fan motor 14 with one of the torque-speed curve shown in Figure 2 DK3 corresponding delivery volume Pressure difference characteristic curve FK1 e, so that, depending on the system characteristic curve AK2 or AK3, a significantly higher pressure difference (AK2) or a significantly higher delivery volume (AK3) results
  • a possible boost operating point is designated by AP1 e of the boost button 26 starts the controller 21 in one embodiment a timer 27. After a time stored on the timer 27 period, the controller 21 switches back to the delivery volume-pressure difference characteristic FK1. The period of time may be adjustable by the operator, for example by means of the touchscreen 25.
  • FIG. 8 shows delivery volume-pressure difference characteristics, in particular for a boost, power and eco mode, according to a further embodiment.
  • FIG. 8 shows that a negative boost-volume-pressure difference characteristic FK1 g can also be provided which is opposite to the delivery volume-pressure difference characteristic FK1 g in FIG Direction of lower pressure difference P and lower flow volume Q is shifted in parallel.
  • a negative boost-volume-pressure difference characteristic FK1 g can also be provided which is opposite to the delivery volume-pressure difference characteristic FK1 g in FIG Direction of lower pressure difference P and lower flow volume Q is shifted in parallel.
  • the delivery volume-pressure difference characteristic curves FK1f, FK1h correspond to the delivery volume-pressure difference characteristic curves FK1a, FK1b from FIG. 4 in that they also have an intersection with the delivery volume-pressure difference characteristic FK1.
  • the conveying volume pressure difference characteristic FK1 h corresponding to an eco mode is h convex and not concave provided as the delivery volume-pressure difference characteristic FK1 b.
  • the control device 21 can be configured to control the blower motor 14 as a function of a user input or automatically, for example as a function of a currently present system characteristic AK2, AK3, which is determined by the control device 21, with one of the delivery volume-pressure difference characteristic curves FK1, FK1 e, FK1f, FK1 g or FK1 h to control the corresponding torque / speed characteristic.
  • the user input and / or the current system characteristic curve AK2, AK3 is provided to the control device 21 as one or more parameters.
  • the activation as a function of a currently present system characteristic curve AK2, AK3 advantageously makes it possible to adapt the operating points of the extractor hood 2 to a possibly provided piping 4.
  • the control device 21 may decide, when the input device 25 recognizes a customer request for more delivery volume Q, that switching from the normal mode (FK1) to an operating point AP1-1 to a power mode (FK1f) with an operating point AP1f-1 provides too little additional delivery volume Q, and therefore switch to the boost mode (FK1 e) with an operating point AP1 e, which has a high additional delivery volume Q.
  • control device 21 recognizes that a system characteristic AK2 is present, it switches to the power mode (FK1f) with an operating point for a customer request for more pressure difference p starting from the normal mode (FK1) with an operating point AP1-2 AP1f-2, since a sufficiently high additional pressure difference p is provided here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ventilation (AREA)

Abstract

Hotte aspirante (2) comprenant un moteur de ventilateur (14) à commutation électronique et un dispositif de commande (21) conçu pour commander le moteur de ventilateur (14) avec une première ou une deuxième courbe caractéristique couple-vitesse de rotation (DK1, DK1a), les courbes caractéristiques couple-vitesse de rotation (DK1, DK1a) présentant au moins un point commun (MA1, MS1).
EP14705542.0A 2013-03-11 2014-02-21 Hotte aspirante Active EP2971976B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14705542T PL2971976T3 (pl) 2013-03-11 2014-02-21 Okap

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013204135.7A DE102013204135A1 (de) 2013-03-11 2013-03-11 Dunstabzugshaube
PCT/EP2014/053462 WO2014139779A1 (fr) 2013-03-11 2014-02-21 Hotte aspirante

Publications (2)

Publication Number Publication Date
EP2971976A1 true EP2971976A1 (fr) 2016-01-20
EP2971976B1 EP2971976B1 (fr) 2020-04-29

Family

ID=50150714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14705542.0A Active EP2971976B1 (fr) 2013-03-11 2014-02-21 Hotte aspirante

Country Status (5)

Country Link
EP (1) EP2971976B1 (fr)
CN (1) CN105209829B (fr)
DE (1) DE102013204135A1 (fr)
PL (1) PL2971976T3 (fr)
WO (1) WO2014139779A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017204046A1 (de) * 2017-03-10 2018-09-13 Maico Elektroapparate-Fabrik Gmbh Verfahren zum Betreiben eines Lüftungsgeräts sowie entsprechendes Lüftungsgerät
CN108457886A (zh) * 2018-02-11 2018-08-28 上海联达节能科技股份有限公司 一种除尘风机多档位控制系统及除尘系统的改造方法
CN110486773B (zh) * 2019-09-30 2020-11-24 佛山市顺德区美的洗涤电器制造有限公司 油烟机的控制方法和油烟机
DE102020118251A1 (de) * 2020-07-10 2022-01-13 Ebm-Papst Mulfingen Gmbh & Co. Kg Verfahren und Ventilatorsystem zur Ermittlung des Zustands eines Filters in einer Ventilatoreinheit

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
WO2003050453A1 (fr) * 2001-11-07 2003-06-19 Lab Products, Inc Station de travail dotee d'un dispositif de regulation du debit d'air
US20050224069A1 (en) * 2004-03-29 2005-10-13 Patil Mahendra M System and method for managing air from a cooktop
KR100589540B1 (ko) * 2004-05-06 2006-06-14 주식회사 벤토피아 정풍량 변정압 팬이 적용된 주방배기시스템
DE102005045137A1 (de) * 2005-09-22 2007-04-05 Minebea Co., Ltd., Kitasaku Lüftereinheit mit einer vorgegebenen künstlichen Kennlinie und Verfahren zu dessen Betrieb
JP4444195B2 (ja) * 2005-10-04 2010-03-31 パナソニック株式会社 送風装置およびそれを搭載した電気機器
JP4687730B2 (ja) * 2008-03-06 2011-05-25 パナソニック株式会社 送風装置およびそれを搭載した電気機器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014139779A1 *

Also Published As

Publication number Publication date
PL2971976T3 (pl) 2020-09-21
DE102013204135A1 (de) 2014-09-11
CN105209829A (zh) 2015-12-30
EP2971976B1 (fr) 2020-04-29
CN105209829B (zh) 2018-06-22
WO2014139779A1 (fr) 2014-09-18

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