EP2839219B1 - Hotte et procédé pour son exploitation - Google Patents

Hotte et procédé pour son exploitation Download PDF

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Publication number
EP2839219B1
EP2839219B1 EP13725793.7A EP13725793A EP2839219B1 EP 2839219 B1 EP2839219 B1 EP 2839219B1 EP 13725793 A EP13725793 A EP 13725793A EP 2839219 B1 EP2839219 B1 EP 2839219B1
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EP
European Patent Office
Prior art keywords
flow rate
value
hood
air flow
motor
Prior art date
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Active
Application number
EP13725793.7A
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German (de)
English (en)
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EP2839219A2 (fr
Inventor
Alessio Beato
Danilo D'antonio
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Whirlpool EMEA SpA
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Whirlpool EMEA SpA
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
Priority claimed from IT000344A external-priority patent/ITTO20120344A1/it
Priority claimed from IT000340A external-priority patent/ITTO20120340A1/it
Priority claimed from IT000342A external-priority patent/ITTO20120342A1/it
Priority claimed from IT000339A external-priority patent/ITTO20120339A1/it
Priority claimed from IT000341A external-priority patent/ITTO20120341A1/it
Priority claimed from IT000343A external-priority patent/ITTO20120343A1/it
Application filed by Whirlpool EMEA SpA filed Critical Whirlpool EMEA SpA
Publication of EP2839219A2 publication Critical patent/EP2839219A2/fr
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Publication of EP2839219B1 publication Critical patent/EP2839219B1/fr
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Classifications

    • 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
    • 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
    • F24C15/2021—Arrangement or mounting of control or safety systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/75—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity for maintaining constant air flow rate or air velocity

Definitions

  • the present invention relates to an extraction hood and to a method of operation thereof.
  • extraction hoods are used in both industrial and household environments, particularly in rooms where food is cooked (kitchens).
  • different types of substances are released in the air in the form of fumes, suspensions and the like. These substances often have an intense odour and/or can be harmful for people; therefore, they have to be extracted from the room and treated through a hood as quickly as possible.
  • the substance to be treated is known, because the food cooking process or the industrial treatment may release different types and quantities of substances in the air.
  • a cooking process for fried food will release in the air a greater quantity of volatile aldehydes than a cooking process for boiled food, which in turn will release in the air a greater quantity of water vapour than fried food. It is therefore necessary to adapt the air treatment process in accordance with the type of food to be prepared.
  • One air treatment process variable available in an extraction hood is the air flow rate.
  • the filter means of the hood are perfectly efficient; when in operation, in fact, the filter means tend to get clogged at a different rate depending on the type of fumes being treated. For example, a cooking process for fried food will release in the air a greater quantity of fumes than a cooking process for boiled food, which in turn will release in the air a greater quantity of water vapour than fried food. It is therefore necessary to constantly monitor the obstruction state of the filter means of an extraction hood. One variable which is useful to detect said obstruction state is the air flow rate.
  • hood is installed correctly; in fact, an improper installation will impair the performance of said hood, hindering the evacuation of the fumes.
  • One variable, which is useful for determining the efficiency of a hood, is the flow rate of the air flow through the hood.
  • air extractors and/or fans are typically also used, which ensure a certain number of air changes within a given time interval.
  • an extraction hood in particular of the evacuating type, i.e. connected to the outside of the room where it has been installed, which can ensure a constant air flow so as to allow, in addition to extraction of fumes, also proper air changes in the room where it has been installed. To ensure all this, it is necessary to know the air flow rate.
  • the speed of the fan means must necessarily be variable, and therefore, at certain revolution speeds, a hood might enter into resonance and cause a considerable increase in the noise emitted in operation.
  • This kind of selective phenomena may also occur within a frequency range wherein the emitted noise is lowest, and their presence may be strongly influenced by the type of installation, i.e. they may be influenced by the length and/or diameter of the exhaust pipe, the number of bends of the latter, etc.
  • European patent application EP 0 596 846 A1 by ELECTROLUX AB describes a hood equipped with an active noise-cancelling device using a loudspeaker.
  • This loudspeaker when appropriately driven by a control unit, to which an acoustic sensor is also connected, can reduce the noise emitted by the hood in operation.
  • US 2005/0224069 A1 discloses a kitchen ventilation system including a sensor for detecting a chemical composition over an active zone of a cooktop.
  • the system also includes an air moving device for displacing air including the chemical composition.
  • a control circuitry is coupled to the sensor and to the air moving device for regulating operation of the air moving device.
  • WO 2010/120429 A2 discloses a ventilation system comprising a fan and a motor driving the fan, for providing a substantially constant airflow based on an electric current provided to the motor and a rotational speed of the motor.
  • the present invention aims at solving these and others problems by providing a hood according to claim 1 and a method for controlling the treatment of an air flow according to claim 9.
  • the idea at the basis of the present invention is to determine and/or estimate a set of operating variables of a hood following the activation of fan means associated therewith, de facto creating a virtual sensor capable of estimating the air flow rate through the hood without using a real sensor like the one described in the prior art.
  • the idea at the basis of the present invention is to determine and/or estimate a set of operating variables of a hood following the activation of a motor comprised in said hood, de facto creating a virtual sensor capable of estimating the air flow rate through the hood without using a real sensor like the one described in the prior art. This allows to keep constant the air flow rate according to the type of cooking to be carried out and/or to finely adjust the air flow rate within a certain range, when acoustic measurement means detect a noise increase indicating the occurrence of a selective phenomenon such as resonance.
  • a hood 1 comprises a channel 10 with a pair of opposite side walls 11, a back wall 12 and a front wall 13; note that said front wall 13 is not shown in the annexed drawings, in order to show the internal architecture and components of the hood 1.
  • the latter also comprises:
  • the hood 1 according to the present invention can be alternatively positioned in front, behind or on one side of a cooking top (not shown in the drawing), so as to be able to collect most odours and fumes produced by the latter.
  • the fan means 30 comprise a variable-speed electric motor 31, preferably of the permanent-magnet synchronous three-phase brushless type, associated with an impeller 32 that provides circulation of the air flow 60.
  • the hood 1 takes in the air 60 from the inlet section 20 and exhausts it through the outlet section 50.
  • this estimation system comprises means for measuring at least one electric quantity associated with the operation of the fan means 30, e.g. current, and means for measuring or estimating at least one mechanical quantity of said fan means 30, e.g. the revolution speed thereof.
  • Knowing the characteristics of the fan means 30 means herein knowing a model capable of providing, for each value of revolution speed and drawn electric current, the respective flow rate value.
  • This model depends on the specific fan means 30 in use (motor 31 and impeller 32), and can be experimentally obtained by using well-known regression statistical techniques, by starting from the data detected during a measurement campaign carried out on an aero-technical test bench exclusively on the fan means 30, i.e. with the latter not coupled to the hood 1.
  • the measurement campaign can be organized as follows: the current and/or power (dependent variable(s)) drawn by the motor 31 are measured with different flow rates of a test air flow (independent variable) flowing through the fan means 30, while keeping constant the revolution speed (control variable) of said fan means 30.
  • the current and/or power measurements should preferably be repeated for each revolution speed at which the fan means 30 will operate in normal working conditions, i.e. when coupled to the hood 1.
  • m rpm x and q rpm x are specific for a particular revolution speed rpm x of the fan means 30, and where m rpm x is greater than zero.
  • a flow rate model 71 created by means of a computer or electronic circuitry program, can output an estimated flow rate value by using, as inputs, the values of the revolution speed of and the current drawn by the fan means 30; said flow rate model 71 can be defined by a set containing x pairs of parameters m rpm x and q rpm x where x is the number of revolution speeds at which the fan means 30 can operate.
  • control system 70 comprising a feedback loop, in turn comprising the flow rate model 71, and a controller 72 adapted to generate control signals for the inverter 73, such as to eliminate the flow rate error; the control system 70 implements a flow rate control of said motor 31.
  • a method for controlling the process for treating the air flow 60 according to an example not part of the invention comprises the following steps:
  • the flow rate model 71 advantageously allows to close the feedback loop by providing the estimated value of the flow rate of the air flow 60, without having to use specific flow rate sensors.
  • the flow rate value thus estimated is then subtracted from a reference flow rate value (set point), thereby obtaining a flow rate error value which is inputted to the controller 72.
  • the controller 72 Based on control laws previously defined through techniques well known to those skilled in the art, the controller 72 generates, as its output, the control signals for the inverter. The latter are inputted to the inverter 73, which will then properly drive the windings comprised in the motor 31 so as to cause the estimated flow rate of the fan means 30 to become as quickly as possible equal to the reference flow rate set by the user or set automatically by the control system 70. In this manner, it is possible to control the flow rate without using specific flow rate sensors, by exploiting mechanical and electrical quantities which can be easily measured and/or estimated.
  • controller 72 may be inputted the values of the revolution speed of and the current drawn by the fan means 30, so that the controller 72 can supervise the operation of said fan means 30 and control the motor 31 according to well-known algorithms and/or detect any problems that might arise, such as seizures, failures or the like.
  • the current drawn by the motor 31 may advantageously be measured by using techniques which are well known to those skilled in the art, such as, for example, shunts in the inverter 73 that drives the motor 31, without any moving parts being used.
  • Hall-effect sensors may be used, which are usually already included in the stator of a permanent-magnet three-phase motor, and which can generate a signal when the permanent magnets on the rotor of the motor 31 pass in front of said Hall-effect sensors, thereby allowing to measure the revolution speed of said rotor.
  • the revolution speed may be measured by using sensors such as encoders, resolvers, tachometers.
  • said revolution speed may be estimated by using known sensorless control algorithms which, for example, measure the back electromotive force (back-EMF) by measuring the voltages and/or currents induced on the windings of the motor 31.
  • back-EMF back electromotive force
  • control unit 70 allows to keep constant the flow rate of the air flow 60 flowing inside the hood 1 independently of the obstruction state of the filter means 40, in that the greater the obstruction of the latter, the greater the pressure drop value downstream of said filter means 40; assuming that the revolution speed of the motor 31 is kept constant, this will cause a flow rate reduction that will decrease the current drawn by the motor 31.
  • This current reduction will lower the value outputted to the flow rate model 71, which will supply a greater flow rate error value to the controller 72, which in turn will modify the control signals inputted to the inverter 73 in such a way as to increase the current drawn by the motor 31 and, as a consequence, the flow rate of the air flow 60.
  • control signals inputted to the inverter 73 will be modified in such a way as to act in a combined manner on the current drawn by and the revolution speed of the motor 31, for the purpose of keeping constant the flow rate of the air flow 60.
  • the reference flow rate value can be set by a user of the hood 1 through an interface (not shown in the annexed drawings), e.g. a keypad, by means of which the reference flow rate value can be set either directly or indirectly.
  • the reference flow rate can be set directly by entering, through said interface, the numerical value of the desired flow rate of the air flow 60.
  • the user can select a desired cooking type through said interface, which is operationally connected to a supervision unit.
  • the supervision unit (not shown in the annexed drawings), which is comprised in the hood 1 and is operationally connected to the control unit 70, will then associate, based on a predetermined correspondence table stored in said supervision unit, the corresponding reference flow rate value to be set, which will be sent to the input of the control unit 70.
  • the cooking type may be chosen from a set of predefined cooking programs.
  • the set of cooking programs comprises a "BOILED” program and a "FRIED” program, wherein the supervision unit associates with the "BOILED” program a reference flow rate value which is higher than the one associated with the "FRIED” program.
  • a method for controlling the treatment of the air flow 60 based on the cooking type comprises the following steps:
  • the interface may also be used for specifying the number of cubic meters of the room where the hood 1 has been installed, so that the supervision unit can calculate a reference flow rate value to be sent to the control unit 70 which can ensure a given number of air changes per time unit.
  • the supervision unit can calculate a reference flow rate value to be sent to the control unit 70 which can ensure a given number of air changes per time unit.
  • a method for making a number of air changes within a predefined time interval in a room where the hood 1 has been installed comprises the following steps:
  • Both of the above-mentioned steps are preferably repeated cyclically when said hood 1 is in an operating condition.
  • control unit 70 Another advantage offered by the use of the control unit 70 is the possibility of recognizing an unsatisfactory installation state of the hood 1, for example due to the adoption of an exhaust pipe that is smaller than required by the rules of good installation practice, excessively long or improperly positioned; such a situation, in fact, will adversely affect the flow rate value, which will be lower than a nominal value predetermined on the basis of tests carried out by the manufacturer in nominal test conditions representing a properly installed hood.
  • a method for detecting the installation state of the hood 1 comprises the following steps:
  • Steps (b) and (c) of the method are preferably activated by the user or by an installer through the interface.
  • the motor 31 While measuring the flow rates at steps (a) and (b), the motor 31 is preferably run at a constant speed, more preferably at its highest speed. This will highlight any differences in the flow rate of the air flow 60 due to the installation conditions.
  • the installation state is determined on the basis of an algebraic ratio between the value of the flow rate of the air flow 60 determined at step (b) and the value of the nominal flow rate determined at step (a), and may take one of the following values:
  • the installation state may take one of the following values:
  • a further advantage offered by the use of the control unit 70 is the possibility of recognizing an obstructed condition of the filter means 40, so that such a situation can be signalled, through suitable signalling means such as a warning lamp and/or an audible alarm or the like, without having to use a differential pressure sensor upstream and downstream of said filter means 40; this situation is detected through periodic verifications carried out by a self-diagnosis procedure, which is preferably executed when the hood 1 is switched on.
  • a self-diagnosis procedure which is preferably executed when the hood 1 is switched on.
  • an estimated flow rate value is stored at a predefined revolution speed, preferably the highest speed. Every time the hood is switched on again, the self-diagnosis procedure will estimate the flow rate at said predefined revolution speed. Any variation in the flow rate from the value stored at start-up will be indicative of the filter obstruction degree.
  • the estimated flow rate becomes lower than a minimum threshold value, it will be signalled that the filter needs to be replaced.
  • a method for detecting the obstructed condition of the filter means 40 comprises the following steps:
  • the onset of the obstructed condition is determined when the ratio between the estimate of the flow rate of the air flow 60 made at step (a) and the second estimate made at step (b) is above a threshold value, preferably equal to 2.
  • control unit 70 A further advantage offered by the use of the control unit 70 is the possibility of reducing the noise.
  • the Applicant has observed that the noise generated by the hood, which generally increases with the flow rate, typically has a non-monotonic trend through the operating range. Due to selective phenomena, such as, for example, resonances, it may happen that within a certain range of flow rate values there are one or more relative minimum points of generated noise, where the hood could advantageously operate to reduce the generated noise without any significant flow rate variation.
  • the generated noise can be measured through acoustic measurement means 90 comprised in the hood 1 and comprising a microphone; said acoustic measurement means 90 are adapted to generate a signal corresponding to the noise generated by the hood.
  • Said measurement means 90 are in signal communication with a noise control system (not shown in the annexed drawings) and supply thereto the information corresponding to the generated noise, said noise control system being possibly comprised in the control unit 70.
  • the noise silencing procedure makes a fine adjustment of the flow rate within a predetermined range of the reference flow rate value defined by the control system 70, in search for an operating point of minimum noise.
  • Said predetermined range is preferably equal to +/- 2% of the reference flow rate value, more preferably to +/- 1% of the reference flow rate value.
  • the method for reducing the noise emitted by the hood 1 comprises the following steps:
  • Figure 5 shows a family of characteristic curves (solid lines) of the fan means 30, each one representing the flow rate-prevalence relation at a certain revolution speed of said fan means 30. These curves can be easily determined experimentally, but they are usually included by the manufacturer in the nominal data of the fan means 30.
  • the isoefficiency curves are closed curves arranged concentrically to a maximum isoefficiency curve ⁇ max , which associates with each flow rate value of the air flow 60 the respective optimal prevalence value generated by the fan means 30.
  • hood according to the invention which can benefit from the efficiency measurement, is shown in Figs. 6 and 7 ; for brevity, the following description will only highlight those parts which make this and the next variants different from the above-described main embodiment; for the same reason, wherever possible the same reference numerals, with the addition of one or more apostrophes, will be used for indicating structurally and/or functionally equivalent elements.
  • This hood according to the invention comprises a control circuit 70' similar to the control circuit 70 of the preceding example, but also comprising a controller 72' with two inputs (instead of one) and an efficiency model 74.
  • the efficiency model 74 can also be created through a computer and/or electronic circuitry program, and can output an efficiency value, being inputted a set of variables comprising the following variables:
  • the simplest way to create the efficiency model 74 is to use a computer and/or electronic circuitry program capable of calculating the ratio between the value of the flow rate of the air flow 60 and the value of the power drawn by the motor 31, and then of multiplying the result by a normalization factor, in order to normalize the efficiency value outputted by the model 74 to a value comprised between 0 and 1.
  • the normalization factor is calculated by dividing the value of the power drawn by the fan means 30 when operating in the maximum efficiency condition by the value of the flow rate obtained from said fan means 30.
  • the method for controlling the process for treating the air flow 60 according to the invention comprises the following steps:
  • the efficiency value outputted by the efficiency model 74 allows, within the control circuit 70', to calculate an efficiency offset value by simply calculating a difference between a unitary value and the efficiency value. This efficiency offset value is then inputted to the controller 72', which, by using suitable control laws, will select appropriate control signals for the inverter to advantageously keep both the flow rate error value and the efficiency offset value as low as possible.
  • control unit 70' just like the control unit 70 used in the preceding example, it is possible to keep constant the flow rate of the air flow 60 flowing inside the hood 1 independently of the air density conditions, thereby minimizing consumption and maximizing efficiency.

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

Claims (10)

  1. Hotte (1) pour traiter un flux d'air (60), comprenant une section d'admission (20) et une section de refoulement (50) permettant respectivement l'entrée et la sortie dudit flux d'air (60), un moyen de ventilateur (30) et un moyen de filtre (40) agencé entre ladite section d'admission (20) et ladite section de refoulement (50), une unité de commande (70') raccordée fonctionnellement audit moyen de ventilateur (30) pour commander des paramètres de fonctionnement de celui-ci, dans laquelle l'unité de commande (70') est configurée pour estimer le débit du flux d'air (60) suite à l'activation d'un moteur électrique (31) associé audit moyen de ventilateur (30), après la détection desdits paramètres de fonctionnement dudit moteur (31), et dans laquelle les paramètres de fonctionnement comprennent un courant tiré par ledit moteur (31) et une vitesse de révolution de celui-ci,
    caractérisée en ce que
    ladite hotte (1) comprend un onduleur (73) pour entraîner le moteur (31) selon des signaux de commande entrés dans ledit onduleur (73), et dans laquelle l'unité de commande (70') comprend
    - un modèle de débit (71) qui, d'après des valeurs d'entrée du courant tiré par ledit moteur (31) et la vitesse de révolution de celui-ci, fournit en sortie une valeur du débit du flux d'air (60),
    - un modèle de rendement (74) qui, d'après des valeurs d'entrée dudit débit, une température du flux d'air (60) et une valeur de la puissance tirée par ledit moteur (31), fournit en sortie une valeur de rendement de ladite hotte (1), et
    - un dispositif de commande (72') configuré pour générer les signaux de commande pour l'inverseur (73), et configuré pour sélectionner lesdits signaux de commande pour garder une valeur d'erreur de débit et une valeur de décalage de rendement aussi faibles que possible,
    de sorte qu'il soit possible de garder constant le débit du flux d'air (60) circulant à l'intérieur de la hotte (1) indépendamment des conditions de masse volumique d'air, minimisant ainsi la consommation et maximisant le rendement ;
    moyennant quoi :
    - ladite valeur d'erreur de débit est obtenue en soustrayant ladite valeur du débit du flux d'air (60) d'une valeur de débit de référence,
    - ladite valeur de décalage de rendement est calculée en tant que différence entre une valeur unitaire et ladite valeur de rendement de ladite hotte (1), et dans laquelle ladite valeur d'erreur de débit et ladite valeur de décalage de rendement sont entrées dans ledit dispositif de commande (72').
  2. Hotte (1) selon la revendication 1, dans laquelle le moteur électrique à vitesse variable (31) est du type sans balai triphasé, synchrone à aimant permanent.
  3. Hotte (1) selon la revendication 2, dans laquelle le moteur (31) est raccordé à et entraîné par l'onduleur (73).
  4. Hotte (1) selon l'une quelconque des revendications 1 à 3, dans laquelle l'unité de commande (70') est également configurée pour comparer le débit estimé du flux d'air (60) avec une valeur de débit de référence, afin de détecter une condition obstruée du moyen de filtre (40).
  5. Hotte (1) selon l'une quelconque des revendications 1 à 4, dans laquelle l'unité de commande (70') est également configurée pour comparer le débit estimé du flux d'air (60) avec une valeur de débit nominale dudit flux d'air (60), afin de détecter un état d'installation de la hotte (1).
  6. Hotte (1) selon l'une quelconque des revendications 1 à 5, dans laquelle ladite unité de commande (70') est également configurée pour générer des signaux de commande pour le moteur (31) sur la base du débit, afin de réaliser un certain nombre de changements d'air, dans un intervalle de temps prédéfini, dans une pièce où ladite hotte (1) a été installée.
  7. Hotte (1) selon l'une quelconque des revendications 1 à 6, dans laquelle ladite unité de commande (70') est également configurée pour générer des signaux de commande pour le moteur (31) qui sont adaptés pour tenter de garder le débit estimé du flux d'air (60) sensiblement égal à une valeur de débit de référence associée à un type de cuisson.
  8. Hotte (1) selon l'une quelconque des revendications 1 à 7, comprenant un moyen de mesure acoustique (90) en communication de signal avec un système de commande de bruit faisant partie de l'unité de commande (70'), et dans laquelle ladite unité de commande (70') est également configurée pour générer des signaux de commande pour le moteur (31) qui sont adaptés pour tenter de garder le débit estimé du flux d'air (60) proche d'une valeur de débit de référence et un niveau de bruit mesuré par le moyen de mesure acoustique (90) en dessous d'une valeur seuil.
  9. Procédé de commande du traitement d'un flux d'air (60) circulant à travers une hotte (1) selon l'une quelconque des revendications 1 à 8, comprenant les étapes de :
    a. estimation d'un débit du flux d'air (60),
    b. génération, sur la base du débit estimé à l'étape a., de signaux de commande pour un moyen de ventilateur (30) adaptés pour garder constante la valeur du débit du flux d'air (60),
    dans lequel l'estimation du débit du flux d'air (60) se fait en détectant des quantités électromécaniques associées au fonctionnement du moyen de ventilateur (30), dans lequel les quantités électromécaniques comprennent une vitesse de révolution du moyen de ventilateur (30) et un courant tiré par celui-ci,
    caractérisé en ce que
    il comprend également les étapes de
    c. détermination d'une valeur de rendement de la hotte (1) au moyen d'un modèle de rendement (74), dans lequel l'estimation du débit du flux d'air (60) se fait par un modèle de débit (71) qui adopte les valeurs du courant tiré par ledit moyen de ventilateur (30) et la vitesse de révolution de celui-ci en entrée, dans lequel le modèle de rendement (74) adopte les valeurs du débit, une température du flux d'air (60) et la puissance tirée par ledit moyen de ventilateur (30) en entrée, et dans lequel les signaux de commande sont sélectionnés, pendant l'étape b., pour garder une valeur d'erreur de débit et une valeur de décalage de rendement aussi faibles que possible, de sorte qu'il soit possible de garder constant le débit du flux d'air (60) circulant à l'intérieur de la hotte (1) indépendamment des conditions de masse volumique d'air, minimisant ainsi la consommation et maximisant le rendement ;
    moyennant quoi :
    - ladite valeur d'erreur de débit est obtenue en soustrayant ladite valeur du débit du flux d'air (60) d'une valeur de débit de référence,
    - ladite valeur de décalage de rendement est calculée en tant que différence entre une valeur unitaire et ladite valeur de rendement de ladite hotte (1).
  10. Procédé selon la revendication 9, dans lequel la génération des signaux de commande pour le moyen de ventilateur (30) se produit également sur la base d'une valeur de débit de référence.
EP13725793.7A 2012-04-17 2013-04-16 Hotte et procédé pour son exploitation Active EP2839219B1 (fr)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
IT000344A ITTO20120344A1 (it) 2012-04-17 2012-04-17 Cappa comprendente mezzi di misura acustici e metodo per la riduzione del rumore emesso da detta cappa
IT000340A ITTO20120340A1 (it) 2012-04-17 2012-04-17 Cappa comprendente mezzi filtranti ed un'unità di controllo capace di riconoscere una condizione ostruita di detti mezzi filtranti
IT000342A ITTO20120342A1 (it) 2012-04-17 2012-04-17 Cappa comprendente un'unità di controllo capace di controllare il processo di ricambio di aria in un locale in cui detta cappa è installata
IT000339A ITTO20120339A1 (it) 2012-04-17 2012-04-17 Cappa e metodo per il controllo del trattamento di un flusso d'aria che fluisce attraverso detta cappa
IT000341A ITTO20120341A1 (it) 2012-04-17 2012-04-17 Cappa con controllo di installazione e metodo per la sua attuazione
IT000343A ITTO20120343A1 (it) 2012-04-17 2012-04-17 Cappa comprendente un'unità di supervisione capace di associare per un tipo di cottura selezionata una portata d'aria
PCT/IB2013/053004 WO2013156922A2 (fr) 2012-04-17 2013-04-16 Hotte et procédé pour son exploitation

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EP2839219B1 true EP2839219B1 (fr) 2018-07-04

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EA (1) EA028345B1 (fr)
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WO2017174773A1 (fr) 2016-04-08 2017-10-12 Arcelik Anonim Sirketi Hotte d'aspiration comprenant un guide d'ions
DE102016109136A1 (de) * 2016-05-18 2017-11-23 Eisfink Max Maier Gmbh & Co. Kg Front-Cooking-Station
DE202017102758U1 (de) * 2017-05-09 2017-06-12 Naber Holding Gmbh & Co. Kg Abluftkanalanordnung für ein Küchenabluftkanalsystem
CN111623388B (zh) * 2019-02-28 2022-02-08 宁波方太厨具有限公司 一种吸油烟机流量自适应控制方法
DE102019210395A1 (de) * 2019-07-15 2021-01-21 BSH Hausgeräte GmbH Gargerätevorrichtung
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WO2013156922A9 (fr) 2013-12-27
WO2013156922A2 (fr) 2013-10-24
EP2839219A2 (fr) 2015-02-25
EA028345B1 (ru) 2017-11-30
WO2013156922A3 (fr) 2014-05-01
EA201491880A1 (ru) 2015-03-31

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