EP2971978B1 - Procédé pour déterminer un état de fonctionnement d'un système de hotte aspirante - Google Patents

Procédé pour déterminer un état de fonctionnement d'un système de hotte aspirante Download PDF

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Publication number
EP2971978B1
EP2971978B1 EP14707168.2A EP14707168A EP2971978B1 EP 2971978 B1 EP2971978 B1 EP 2971978B1 EP 14707168 A EP14707168 A EP 14707168A EP 2971978 B1 EP2971978 B1 EP 2971978B1
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EP
European Patent Office
Prior art keywords
extractor hood
torque
pressure difference
function
delivery volume
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.)
Active
Application number
EP14707168.2A
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German (de)
English (en)
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EP2971978A1 (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
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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.)
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Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL14707168T priority Critical patent/PL2971978T3/pl
Publication of EP2971978A1 publication Critical patent/EP2971978A1/fr
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Publication of EP2971978B1 publication Critical patent/EP2971978B1/fr
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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
    • 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
    • F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
    • 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

Definitions

  • the present invention relates to a method for determining an operating state of an extractor hood arrangement.
  • fan motors in the form of asynchronous motors were mainly used in extractor hoods due to their cost-effective design.
  • the asynchronous motors are usually designed as capacitors or gap motors.
  • the power control takes place via winding taps or a phase control.
  • the torque-speed characteristic is predetermined by their design and can therefore only be changed to a limited extent.
  • Extractor hoods can be used in kitchens as exhaust air or circulating air devices.
  • the extractor hood When used as an exhaust air device, the extractor hood is connected to piping at the customer's, which leads the air filtered by the extractor hood out of the kitchen.
  • the extractor hood In recirculation mode, on the other hand, the extractor hood is connected directly to the air volume of the kitchen interior, i.e. without the interposition of piping.
  • an individual system characteristic curve results for a respective extractor hood.
  • An intersection of the system characteristic with a delivery volume / pressure difference characteristic of the extractor hood results in the working point of the extractor hood.
  • the working point here means the delivery volume and the pressure difference which occurs when the extractor hood is in operation.
  • the delivery volume / pressure difference characteristic has a fixed relationship with the torque / speed characteristic of the asynchronous motor.
  • the operating point varies from customer to customer depending on the installation situation of the extractor hood, which is present in each case.
  • a manufacturer of extractor hoods does not know the respective installation situation at the customer.
  • US 2012/0052792 A1 describes a ventilation unit for installation in a ventilation system.
  • the ventilation unit includes a motor coupled to a fan and a power source.
  • the fan unit has an electric motor for driving a fan wheel and a motor controller.
  • WO 2010/065793 A1 describes a system and method for controlling an exhaust flow rate in an exhaust ventilation system of a range hood.
  • US 2010/092275 A1 describes a household appliance with a fan speed control.
  • US 2011/0000652 A1 describes a ventilation device and associated electronic equipment. This document discloses the preamble of claim 1.
  • EP 2 765 359 A2 describes a method for monitoring an air flow in an air flow duct, in which a fan wheel driven by a fan motor and at least one air filter are arranged, the method detecting at least one operating parameter or a change in at least one operating parameter of the fan motor.
  • One object of the present invention is to determine an operating state of an extractor hood arrangement comprising an extractor hood.
  • a method for determining an operating state of an extractor hood arrangement comprising an extractor hood is provided. According to the method, the operating state is determined as a function of a torque / speed value pair of a fan motor of the extractor hood.
  • the operating state is an exhaust air and a recirculation mode of the extractor hood assembly.
  • the delivery volume is the volume of air (including any vapor) that is delivered per unit of time through the extractor hood and any piping connected to it by means of the fan motor.
  • the pressure difference means the pressure difference with which the fan motor acts on the air volume.
  • the pressure difference can be measured, for example, as the pressure difference between an air outlet of the extractor hood and the surroundings of the extractor hood.
  • the pressure difference can be measured on the air outlet side as a static pressure difference in a pressure chamber.
  • the delivery volume can be measured by means of a Venturi nozzle connected downstream of the pressure chamber.
  • the extractor hood arrangement is thus set up to determine an operating state of the same at the customer's premises. Depending on the determined operating state, the extractor hood can then take additional measures automatically, for example adapting a torque-speed characteristic curve of the fan motor, i.e. in particular switching to a power mode or eco mode, as will be explained in more detail below. Additionally or alternatively, the operating status can also be displayed on a display device of the extractor hood, for example in the form of numbers, words and / or symbols.
  • the fan motor is designed as an electronically commutated synchronous motor which is operated with direct current.
  • Other names for such motors are BLDC (brushless direct current motor) or EC motor (electronically commutated motor).
  • the present fan motor has a high flexibility with regard to its control options.
  • the torque / speed characteristic and thus also a delivery volume / pressure difference characteristic of the extractor hood arrangement can be freely selected and adapted within certain limits.
  • a control device of the extractor hood for controlling the fan motor can have software which defines a first and a second torque-speed characteristic.
  • the torque-speed characteristics can be stored in a memory of the control device.
  • the torque-speed characteristics can be stored in the form of tables of values.
  • the control device can be provided, for example, in the form of a computer device, in particular as a microprocessor.
  • a parameter can be the current consumed by the fan motor, for example.
  • An evaluation device can have a function which, for example, maps the parameter in the form of a measured current intensity on a delivery volume and / or a pressure difference of the extractor hood.
  • the function can be stored on the evaluation device, in particular on a memory thereof, for example by means of an equation or a table.
  • the fan motor is an electrically commutated direct current motor which is controlled by means of a control device as a function of at least one torque-speed characteristic.
  • the operating state is determined as a function of two parameters in the form of a torque-speed value pair of the at least one torque-speed characteristic curve.
  • a respective torque-speed value pair can then be mapped to a current operating state of the extractor hood arrangement via a function by means of an evaluation device.
  • an equation or a table can be stored as a function on the evaluation device, in particular in a memory thereof.
  • the operating state is determined as a function of a function stored in a memory of the extractor hood and the two parameters in the form of a torque-speed value pair.
  • the function can be provided discretely or continuously. For example, a table or equation can be used become.
  • the function can be stored in a memory of an evaluation device of the extractor hood.
  • the function in the production process of the extractor hood is stored in the memory.
  • the function is therefore stored in the memory before the extractor hood is delivered to the customer.
  • the function can be stored in the memory, whereupon the memory is built into the extractor hood. The function is then available when the customer is operating the extractor hood.
  • the function is determined before the production process of the extractor hood by means of a test extractor hood arrangement, the delivery volume and / or pressure difference of which is varied.
  • the function is determined by the fact that an extractor hood is not connected to any piping (recirculation mode) or piping of different lengths (exhaust air mode) in a test environment.
  • the delivery volume and / or the pressure difference are detected by means of sensors and assigned to the at least one parameter.
  • the delivery volume and / or the pressure difference can be assigned to a current strength supplied to the fan motor or to a torque-speed value pair of the fan motor. In the case of an electrically commutated DC motor, the torque and speed can be read out from the corresponding control device.
  • the operating state is determined when the extractor hood is used as intended.
  • the delivery volume and / or the pressure difference are determined by means of the method on site at the customer.
  • the installation situation at hand for example also a piping length of a piping connected to the extractor hood, can be determined.
  • the extractor hood arrangement exclusively comprises the extractor hood or the extractor hood and piping connected to it in an air-conducting manner.
  • the extractor hood In the event that the extractor hood is operated as a circulating air device, no piping is provided, so that the extractor hood arrangement exclusively comprises the extractor hood.
  • the extractor hood arrangement In the event that the extractor hood is operated as an exhaust air device, the extractor hood arrangement comprises the extractor hood and piping connected to it in an air-conducting manner.
  • the piping can have different lengths and / or diameters and thus a variable air resistance.
  • the operating state is shown on a display device of the extractor hood.
  • the display device can be designed, for example, as a screen, in particular a TFT screen and / or a touch screen.
  • the display device can be set up to display the current delivery volume, for example in the form of cubic meters per hour or in the form of a bar, the length of which depends on the amount of the delivery volume.
  • a timer (timer) is started and / or, when the timer has reached a predetermined value, this is communicated to an operator by means of an output device.
  • a timer can be started and this can be displayed to the operator on a display device.
  • the timer can be displayed in the form of a bar, the length of which depends on the time that has passed.
  • the operator can then decide for himself when to replace a recirculating air filter on the extractor hood.
  • the operator can be informed via an output device that the circulating air filter is to be replaced when the timer reaches a predetermined value.
  • the output device can be designed in the form of a display device, for example a TFT screen or touch screen, or a loudspeaker for generating a warning tone.
  • a filter change symbol can be displayed on the display device when the timer has reached the predetermined value.
  • a circulating air filter for example an activated carbon filter, is such a filter which is provided in the extractor hood in circulating air mode in order to enable better cleaning of the air to be filtered.
  • Such a filter is not provided for exhaust air operation.
  • the control device controls the fan motor with a torque-speed characteristic curve adapted to the circulating air or exhaust air operation.
  • the electronically commutated direct current motor is controlled with a first or second torque-speed characteristic curve as a function of the determined operating state.
  • a torque-speed characteristic curve can be adapted to a particular operating state.
  • the first and second torque-speed characteristics can have a common point.
  • the fact that the torque / speed characteristics have at least one common point means that the torque / speed characteristics have an identical torque / speed value pair or an identical profile in a first area (in at least one point) and in a second Range have a different torque-speed value pair or a different course.
  • the first torque-speed characteristic curve can, for example, be assigned to a normal mode of a first operating stage of the extractor hood that can be selected by an operator.
  • the second torque-speed characteristic curve can be assigned to a power mode of the extractor hood in the first operating stage.
  • the power mode can correspond to an operation of the extractor hood in which the delivery volume is increased compared to the normal mode.
  • the extractor hood detects, for example, that there is a recirculation mode in which a filter, in particular an activated carbon filter, is used, it can switch on the power mode automatically, that is, without user interaction.
  • the control and evaluation device can be designed accordingly for this purpose.
  • the extractor hood thus has, for example, improved extraction in each of four operating levels compared to a respective normal mode. In fact, such a reduction in suction power is compensated for in the recirculation mode, so that every customer, regardless of whether he uses the extractor hood in the recirculation mode or in the drain mode at home, will find a satisfactory extraction system.
  • the electronically commutated fan motor can be controlled by a control device of the extractor hood with a first, second or third torque-speed characteristic.
  • the first and third torque-speed characteristics can each be selected by an operator using an input device.
  • the control device is further designed to control the fan motor based on the first or third torque-speed characteristic curve with the second torque-speed characteristic curve as a function of the determined operating state.
  • an operator can switch the extractor hood between a first operating level (first torque-speed characteristic) and a second operating level (second torque-speed characteristic) by pressing a button, for example.
  • the control device then automatically switches from the first torque-speed characteristic curve to the second torque-speed characteristic curve as a function of the determined operating state. In this way, it is possible, for example, to react flexibly to a system characteristic curve available at the customer.
  • the first, second and / or third torque-speed characteristic curve has an asynchronous characteristic.
  • the asynchronous characteristic therefore corresponds in principle to a torque-speed characteristic curve which corresponds to the shape of a horizontal "S".
  • the asynchronous characteristic of the torque-speed characteristic curve comprises a valley, which is followed by a mountain in the direction of increasing speed. With increasing approach to the nominal speed, the torque drops asymptotically towards zero.
  • the first torque-speed characteristic can be, for example, a normal mode of a first operating stage of the extractor hood.
  • the second torque-speed characteristic curve can correspond to a power mode, eco mode or boost mode of the extractor hood.
  • the second torque-speed characteristic is selected in order to avoid resonance effects of the extractor hood arrangement in the determined operating state.
  • an extractor hood arrangement with an extractor hood which comprises a fan motor and an evaluation device, is provided.
  • the evaluation device is set up to determine an operating state of the extractor hood arrangement as a function of the torque and speed of the fan motor.
  • the evaluation device can be designed as a computer device, in particular a microprocessor.
  • the extractor hood can also have a control device and / or a display device, as described above.
  • the control and evaluation device can be integrated into a computer device.
  • the extractor hood is preferably designed as a household appliance.
  • Figure 1 shows schematically an extractor hood assembly 1 according to an embodiment.
  • the extractor hood arrangement 1 comprises an extractor hood 2, which is arranged above a hob 3 in a kitchen.
  • the extractor hood 2 can be designed, for example, as a hood or a chimney.
  • the extractor hood 2 can be attached to a building wall 5 of the kitchen - like a piping 4.
  • the extractor hood 2 conveys vapors 6 from above the hob 3 via an air inlet 7 to an air outlet 11 of the same.
  • the air outlet 11 is connected in an air-conducting manner to the environment outside the kitchen via the piping 4.
  • the extractor hood can be provided as a circulating air device, the air outlet 11 being connected to the interior 10 of the kitchen in an air-conducting manner.
  • the extractor hood 2 comprises a fan wheel 13.
  • the fan wheel 13 is driven by an electronically commutated fan motor 14.
  • the fan wheel 13 forms a radial fan 16 with a surrounding spiral housing 15, which sucks the vapor 6 through a grease filter 12 in the area of the air inlet 7 and expels it through the air outlet 11.
  • the radial fan 16 has to overcome the internal air resistance of the extractor hood 2, which results in particular from the radial fan 16 itself and internal piping 17.
  • the radial fan 16 has to overcome the air resistance of the piping 4 (if this is present) in order to convey the air to the outside of the interior 10 of the kitchen.
  • the internal air resistance of the extractor hood 2 results in a system characteristic curve of the same in recirculation mode.
  • the sum of the internal air resistance of the extractor hood 2 and the air resistance of the piping 4 results in the system characteristic curve in exhaust air mode. Exemplary system characteristics are in Figure 3 and designated there by AK1, AK2 and AK3.
  • the extractor hood 2 comprises a control and evaluation device 21 which controls the fan motor 14.
  • the control and evaluation device 21 is designed, for example, as a microprocessor and comprises a memory 22.
  • On the memory 22 are in the form of software in Figure 2 Torque-speed characteristics shown are stored.
  • Figure 2 shows a first torque-speed characteristic curve DK1, a second torque-speed characteristic curve DK1a, a third torque-speed characteristic curve DK1b, a fourth torque-speed characteristic curve DK2, and a fifth torque-speed characteristic curve DK3.
  • the torque M of the fan motor 14 is shown as a function of its speed n.
  • the torque-speed characteristics DK1 to DK3 each have an asynchronous characteristic. That is, their shape corresponds to a lying "S". This also means that each of the torque-speed characteristics DK1 to DK3 has a tightening torque M A1 , M A2 , M A3 , a saddle torque M S1 , M S2 , M S3 , a tilting torque M K1 , M K1a, M K1b , M K2 , M K3 and a nominal speed n N includes.
  • the torque decreases with the saddle torque M S1 , M S2 , M S3 increasing speed n and then increases again, and reaches its maximum M K1 , M K1a , M K1b , M K2 , M K3 .
  • the torque M then drops again and approaches the nominal speed n N asymptotically towards zero.
  • a working area in which the fan motor 14 is typically activated by the control and evaluation device 21 when the extractor hood 2 is in operation is designated by AH.
  • the torque-speed characteristics DK1, DK1a, DK1b have an identical course in sections.
  • the tightening torque and the saddle torque M A1 , M S1 for the torque-speed characteristics DK1 to DK1b are identical. They differ only with regard to their tilting moment M K1 , M K1a and M K1b.
  • the overturning moment M K1a is above the overturning moment M K1 and the overturning moment M K1b is below the overturning moment M K1 .
  • the torque-speed characteristic curve DK2 runs parallel to the torque-speed characteristic curve DK1 and is shifted upwards with respect to this, that is to say is characterized throughout by a higher torque M. Consequently, the overturning moment M K2 lies above M K1a, M K1 and M K1b .
  • the torque-speed characteristic curve DK3 also runs parallel to the torque-speed characteristic curve DK1 and between this and the torque-speed characteristic curve DK2.
  • the torque-speed characteristic curve DK1 is assigned, for example, to a normal mode of a first operating level of the extractor hood 2 and the torque-speed characteristic curve DK2 is assigned to a normal mode of a second operating level of the extractor hood 2.
  • Further operating stages for example a third and a fourth operating stage, can also be provided, which are shown in FIG Figure 1 are shown.
  • an off state of the extractor hood or the fan motor 14 is also provided.
  • the extractor hood 2, as in Figure 1 shown include buttons 23, by means of which the off state "0" and the first to fourth operating levels "1", "2", “3", "4" can be selected.
  • the control and evaluation device 21 does not control the fan motor 14 (off state) or with the first torque-speed characteristic curve DK1 (first operating level) or the fourth torque-speed characteristic curve DK2 (second operating level ) or another torque-speed curve (third and fourth operating stage).
  • the buttons 23 some other input device could also be provided.
  • the second torque-speed characteristic curve DK1a corresponds, for example, to a power mode and the third torque-speed characteristic curve DK1b to an eco mode, as will be explained in more detail below.
  • an operator can switch the extractor hood 2 out of the normal mode according to the first torque-speed value by pressing an input device, for example in the form of a button 24 Switch characteristic curve DK1 to the power mode according to the torque-speed characteristic curve DK1a or the eco mode according to the torque-speed characteristic curve DK1b. For example, switching to power mode can take place if a higher delivery volume flow is desired.
  • 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 overturning moment M K2a is then above the overturning moment M K2 and the overturning moment M K2b is below the overturning moment M K2 .
  • the extractor hood 2 can comprise a display device, for example in the form of a TFT screen 25, on which the operating level of the extractor hood 2 is displayed.
  • the TFT screen 25 can also display whether the extractor hood 2 is in normal mode, power mode or eco mode.
  • the TFT screen 25 can still display a delivery volume currently being delivered by the extractor hood 2, for example in cubic meters per hour.
  • the TFT screen 25 can be controlled accordingly by the control and evaluation device 21.
  • the input devices 23, 24 could also be integrated into the display device 25 in that it is designed, for example, as a touchscreen, which is at the same time also an 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 Figure 1 ) and a pressure which is measured, for example, in the air outlet 11 of the extractor hood 2.
  • the delivery volume Q means an air volume delivered per unit of time, for example in cubic meters per hour.
  • Each of the torque-speed characteristics Figure 2 is a delivery volume / pressure difference curve in Figure 3 assigned.
  • the torque / speed characteristic curve DK1 corresponds to the delivery volume / pressure difference characteristic line FK1
  • the torque / speed characteristic curve DK2 corresponds to the delivery volume / pressure difference characteristic line FK2.
  • the torque / speed characteristics corresponding to the delivery volume / pressure difference characteristics FK3 and FK4 are shown in Figure 2 Not shown.
  • Each pair of values from a respective torque-speed characteristic curve Figure 2 has a correspondence on a respective delivery volume / pressure difference characteristic curve Figure 3 .
  • the extractor hood 2 is now operated, for example, as a circulating air device and the first operating level "1" in normal mode and thus the first delivery volume pressure difference characteristic curve FK1 is selected by means of a button 23, an operating point AP1 results at which the extractor hood 2 operates.
  • the working point AP1 is an intersection between the delivery volume pressure difference characteristic curve FK1 and the system characteristic curve AK1.
  • the system characteristic curve AK2 can represent piping 4 with a first length and the system characteristic curve AK3 can represent piping 4 with a second length, the second length being greater than the first length and correspondingly also the air resistance being higher.
  • the working points AP1, AP2, AP3 and AP4 result from switching between operating levels "1" to "4" in normal mode, see Figure 2 .
  • the delivery volume / pressure difference characteristic curves FK1 to FK4 shown are stored, for example, in the form of a table on the memory 22 of the control and evaluation device 21. Furthermore, torque / speed value pairs M, n assigned to a respective delivery volume / pressure difference value pair p, Q can be stored in the table.
  • a test extractor hood arrangement is equipped with sensors before the actual extractor hood 2 is manufactured in order to measure the delivery volume Q and the pressure difference p.
  • the extractor hood 2 is operated in a step 902 as a circulating air device, that is to say without the piping 4, and as an exhaust air device, that is to say with piping 4 of different lengths, whereby the delivery volume Q and the pressure difference p are varied. At the same time, the delivery volume Q and the pressure difference p are measured. It is also possible to switch between the various torque-speed characteristics DK1 to DK3 by means of the control and evaluation device 21. The current torque-speed value pair M, n can be read out from the control and evaluation device 21.
  • a respective measured delivery volume / pressure difference value pair p, Q is assigned to a respective torque / speed value pair M, n.
  • the value pairs p, Q and M, n are then stored in a table in a step 903.
  • the table is written to the memory 22 during the production of the extractor hood 2.
  • an operating state of the extractor hood 2 can be determined as a function of a current torque / speed value pair M, n.
  • the operating state is a circulating air or exhaust air operation UB, AB of the extractor hood 2, as will be explained in more detail on the basis of FIG Fig. 5 is explained.
  • control and evaluation device 21 can use the current torque / speed value pair M, n to determine the delivery volume / pressure difference value pair p, Q or the exhaust air or recirculation mode AB, UB from the table.
  • control and evaluation device 21 can determine the system characteristic curve AK1 to AK3 on the basis of the current delivery volume / pressure difference value pair p, Q. In particular, the control and evaluation device 21 can automatically determine the parameter “a” of the above equation.
  • the control and evaluation device 21 can operate the fan motor 14 in a respective operating stage “1" to "4" in one Power or Boost mode - and not in normal mode - control automatically.
  • Boost mode is based on Figure 7 explained in more detail. If, on the other hand, the control and evaluation device 21 determines that exhaust air operation of the extractor hood 2 is present, it can automatically control the fan motor 14 in normal mode in a respective operating level "1" to "4".
  • a timer 31 is started when the extractor hood 1 or the control and evaluation device 21 detects the presence of a recirculation mode. As long as the timer falls below a predetermined value, that is to say a predetermined period of time, “Filter OK” is displayed on the TFT screen 25. However, if the timer exceeds the predetermined value, the TFT screen 25 can display “change filter”. The operator then knows that it is time to replace a circulating air filter, for example the grease filter 12.
  • the extractor hood 2 or the control and evaluation device 21 is set up to automatically switch, for example, from the power mode to the boost mode when either the timer 31 has reached the predetermined value, that is the filter is full or the working point of the extractor hood 2 changes. This is also still based on Figure 5 explained in more detail.
  • FIG. 4 now shows a selected delivery volume / pressure difference characteristic curve FK1. It is like in Figure 3 the pressure difference p is plotted as a function of the delivery volume Q.
  • the delivery volume / pressure difference characteristic curve FK1 Figure 4 corresponds to the torque-speed characteristic curve DK1 Figure 2 .
  • a delivery volume pressure difference characteristic curve FK1a corresponds to the torque / speed characteristic curve DK1a
  • a delivery volume pressure difference characteristic curve FK1b corresponds to the torque / speed characteristic curve DK1b.
  • the delivery volume pressure difference characteristic curve FK1, FK1a and FK1b each have different points of intersection with the system characteristic curve AK1 shown as an example, and accordingly different value pairs p, Q.
  • Figure 5 shows further delivery volume / pressure difference characteristics, for example for the extractor hood 2 Figure 1 .
  • a further torque-speed characteristic curve can be stored in the memory 22 of the control and evaluation device 21, which corresponds to the delivery volume-pressure difference characteristic curve FK1c.
  • the control and evaluation device 21 can be set up to recognize whether the extractor hood 2 is being used in a circulating air or exhaust air mode UB, AB, as in connection with FIG Fig. 9 mentioned. In detail, this can be accomplished, for example, by assigning certain value pairs p, Q to a recirculation mode UB and other value pairs p, Q to an exhaust air mode AB in the table stored in the memory 22.
  • the control and evaluation device 21 can then, for example, automatically decide that in the exhaust air mode AB it should use the fan motor 14 with the torque-speed characteristic curve DK1 corresponding to the delivery volume / pressure difference characteristic curve FK1 and, in the recirculation mode UB, the fan motor 14 with the delivery volume Pressure difference characteristic curve FK1c corresponding torque-speed characteristic curve (not shown) controls.
  • the fan motor 14 automatically provides a higher pressure difference p in the recirculation mode UB, in which it is necessary to work against a higher air resistance due to the existing recirculation filter.
  • control and evaluation device 21 can decide if it wants to shift the operating points AP1 to AP4 (see FIG Figure 3 ) determines over time that the grease filter 12 or the piping 4 is clogged.
  • the control and evaluation device 21 can then control the fan motor 14 in, for example, the first operating stage "1" with the torque / speed characteristic curve corresponding to the delivery volume / pressure difference characteristic line FK1c - instead of the torque / speed characteristic line corresponding to the delivery volume / pressure difference characteristic line FK1.
  • characteristic curve DK1 - in order to keep the delivery volume Q the same despite the higher air resistance.
  • FIG. 6 now shows the case that resonances occur at an operating point APR. This can be determined, for example, by testing the extractor hood 2 in connection with, for example, various pipework 4, as in connection with FIG Fig. 9 described. Provision can now be made for the operating point APR to be bypassed by changing in sections from the delivery volume pressure difference characteristic curve FK1 to a delivery volume pressure difference characteristic curve FK1d.
  • the control and evaluation device 21 can be set up accordingly for this purpose.
  • the delivery volume / pressure difference characteristic curve FK1d corresponds to a predetermined torque-speed characteristic curve, which, however, is not shown in any of the figures.
  • Fig. 7 illustrates the possibility of providing a delivery volume pressure difference characteristic curve FK1e, which is shifted parallel to the delivery volume pressure difference characteristic curve FK1, for example in the direction of an increasing pressure difference p and an increasing delivery volume Q.
  • the extractor hood is, for example, in operating level "1" (Delivery volume pressure difference characteristic curve FK1) and if the operator presses a boost button 26 of the extractor hood 2, the control and evaluation device 21 controls the fan motor 14 with one of the in Figure 2
  • the torque-speed characteristic curve DK3 shown corresponds to the delivery volume pressure difference characteristic curve FK1e, 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 with AP1e.
  • the control and evaluation device 21 starts a timer 27 in one embodiment. After a period of time stored on the timer 27 has elapsed, the control and evaluation device 21 switches back to the delivery volume / pressure difference characteristic curve FK1.
  • the time span can be provided to be adjustable by the operator, for example by means of the touchscreen 25.
  • Fig. 8 shows delivery volume / pressure difference characteristic curves in particular for a boost, power and eco mode according to a further embodiment.
  • Fig. 7 shows Fig. 8 that a negative boost / delivery volume / pressure difference characteristic curve FK1g can also be provided, which is opposite to the delivery volume / pressure difference characteristic FK1g is shifted in parallel in the direction of lower pressure difference P and lower delivery volume Q.
  • an eco or power mode can be configured differently for different pipework, ie system characteristics.
  • the delivery volume pressure difference characteristics FK1f, FK1h correspond to the delivery volume pressure difference characteristics FK1a, FK1b Fig. 4 to the effect that they also have an intersection with the delivery volume / pressure difference characteristic curve FK1.
  • the delivery volume pressure difference characteristic curve FK1h corresponding to an eco mode is provided convex and not concave like the delivery volume pressure difference characteristic curve FK1b.
  • the control and evaluation device 21 can be set up to the fan motor 14 depending on a user input or automatically, for example depending on a currently available system characteristic curve AK2, AK3, which is determined by the control and evaluation device 21, with a the delivery volume / pressure difference characteristic curves FK1, FK1e, FK1f, FK1g or FK1h corresponding torque-speed characteristic.
  • the user input and / or the currently available system characteristic AK2, AK3 is made available to the control and evaluation device 21 as one or more parameters.
  • the activation as a function of a currently available system characteristic AK2, AK3 advantageously allows the operating points of the extractor hood 2 to be adapted to any pipework 4 that may be provided.
  • the control and evaluation device 21 when the input device 25 recognizes a customer request for more delivery volume Q, can decide that a switch from normal mode (FK1) with an operating point AP1- 1 to a power mode (FK1f) with an operating point AP1f-1 yields too little additional delivery volume Q, and therefore switch to the boost mode (FK1e) with an operating point AP1e which has a high additional delivery volume Q.
  • control and evaluation device 21 If, on the other hand, the control and evaluation device 21 detects that a system characteristic curve AK2 is present, it switches on with a customer request for more pressure difference p based on the normal mode (FK1) an operating point AP1-2 to power mode (FK1f) with an operating point AP1f-2 um, since a sufficiently high additional pressure difference p is provided here.
  • FK1 normal mode
  • FK1f power mode

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ventilation (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Claims (10)

  1. Procédé destiné à déterminer un état de fonctionnement (UB, AB) d'un agencement de hotte aspirante (1) comprenant une hotte aspirante (2), dans lequel l'état de fonctionnement (UB, AB) est déterminé (905) en fonction de deux paramètres (M, n) sous forme d'une paire de valeurs couple-vitesse (M, n) d'un moteur de ventilateur (14) de la hotte aspirante (2), dans lequel le moteur de ventilateur (14) est un moteur à courant continu commuté électriquement, lequel est commandé au moyen d'un dispositif de commande (21) en fonction d'au moins une courbe caractéristique couple-vitesse (DK1 - DK3), caractérisé en ce que l'état de fonctionnement (UB, AB) est déterminé en fonction d'une fonction mémorisée dans une mémoire (22) de la hotte aspirante (2) et des deux paramètres (M, n) sous forme de la paire de valeurs couple-vitesse de l'au moins une courbe caractéristique couple-vitesse (DK1 - DK3), dans lequel l'état de fonctionnement (UB, AB) est un mode de fonctionnement à air évacué (AB) et/ou un mode de fonctionnement à air recyclé (UB), dans lequel la fonction créée une attribution entre la paire de valeurs couple-vitesse (M, n) et une paire de valeurs débit-pression différentielle (p, Q), dans lequel la fonction attribue au mode de fonctionnement à air recyclé (UB) des paires de valeurs débit-pression différentielle déterminées (p, Q) et d'autres paires de valeurs débit-pression différentielle (p, Q) au mode de fonctionnement à air évacué (AB).
  2. Procédé selon la revendication 1, caractérisé en ce que la fonction est mémorisée (904) dans la mémoire (22) au cours du processus de fabrication de la hotte aspirante (2).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la fonction est déterminée (901 - 903) avant le processus de fabrication de la hotte aspirante (2) au moyen d'un agencement test de hotte aspirante dont le débit (Q) et/ou la pression différentielle (p) sont variés.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'état de fonctionnement (UB, AB) est déterminé pendant l'utilisation conforme à l'emploi de la hotte aspirante (2).
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'une courbe caractéristique d'installation (AK1 - AK3) de l'agencement de hotte aspirante (2) est déterminée (906) au moyen d'au moins une paire de valeurs débit-pression différentielle (Q, p) et d'une fonction mémorisée dans une mémoire (22) de la hotte aspirante (2).
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'agencement de hotte aspirante (1) comprend uniquement la hotte aspirante (2) ou la hotte aspirante (2) et un système de tuyauterie (4) relié à celle-ci de manière à conduire l'air.
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'état de fonctionnement (p, UB, AB) est représenté sur un dispositif d'affichage (25) de la hotte aspirante (2).
  8. Procédé selon la revendication 1, caractérisé en ce que, lorsqu'il est déterminé que la hotte aspirante (2) se trouve en mode de fonctionnement à air recyclé (UB), une minuterie (31) est démarrée et en ce que, lorsque la minuterie (31) atteint une valeur prédéterminée, ceci est communiqué à une personne de service au moyen d'un dispositif de sortie (25).
  9. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le moteur à courant continu commuté électroniquement est commandé à l'aide d'une première ou d'une deuxième courbe caractéristique couple-vitesse (DK1- DK3) en fonction de l'état de fonctionnement (p, UB, AB) déterminé.
  10. Agencement de hotte aspirante (1) comprenant une hotte aspirante (2) qui comprend un moteur de ventilateur (14) et un dispositif d'évaluation (21) qui est conçu pour réaliser un procédé selon l'une quelconque des revendications 1 à 9.
EP14707168.2A 2013-03-11 2014-02-28 Procédé pour déterminer un état de fonctionnement d'un système de hotte aspirante Active EP2971978B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14707168T PL2971978T3 (pl) 2013-03-11 2014-02-28 Sposób określania stanu roboczego układu okapu kuchennego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013204137.3A DE102013204137A1 (de) 2013-03-11 2013-03-11 Verfahren zum Ermitteln eines Betriebszustands einer Dunstabzugshaubenanordnung
PCT/EP2014/053919 WO2014139806A1 (fr) 2013-03-11 2014-02-28 Procédé pour déterminer un état de fonctionnement d'un système de hotte aspirante

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EP2971978A1 EP2971978A1 (fr) 2016-01-20
EP2971978B1 true EP2971978B1 (fr) 2021-05-19

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CN (1) CN105164472B (fr)
DE (1) DE102013204137A1 (fr)
ES (1) ES2885814T3 (fr)
PL (1) PL2971978T3 (fr)
WO (1) WO2014139806A1 (fr)

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DE102018129616A1 (de) * 2018-11-23 2020-05-28 Soler & Palau Research, S.L.U. Verfahren und System zur Beschleunigung und Verdünnung eines Abluftstroms
DE102019212325A1 (de) * 2019-08-17 2021-02-18 Ziehl-Abegg Se Verfahren zur quantitativen Bestimmung einer aktuellen betriebszustandsabhängigen Größe eines Ventilators, insbesondere einer Druckänderung oder Druckerhöhung, und Ventilator
CN110553297B (zh) * 2019-09-30 2021-03-19 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
CN113531853A (zh) * 2021-06-29 2021-10-22 青岛海尔空调器有限总公司 厨房空调的控制方法、装置及设备

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Also Published As

Publication number Publication date
EP2971978A1 (fr) 2016-01-20
DE102013204137A1 (de) 2014-09-11
CN105164472A (zh) 2015-12-16
ES2885814T3 (es) 2021-12-15
PL2971978T3 (pl) 2021-09-27
CN105164472B (zh) 2018-07-10
WO2014139806A1 (fr) 2014-09-18

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