EP1906095A2 - Procédé destiné au réglage du débit d'air d'un compartiment d'un four - Google Patents

Procédé destiné au réglage du débit d'air d'un compartiment d'un four Download PDF

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Publication number
EP1906095A2
EP1906095A2 EP07016039A EP07016039A EP1906095A2 EP 1906095 A2 EP1906095 A2 EP 1906095A2 EP 07016039 A EP07016039 A EP 07016039A EP 07016039 A EP07016039 A EP 07016039A EP 1906095 A2 EP1906095 A2 EP 1906095A2
Authority
EP
European Patent Office
Prior art keywords
temperature
cooking chamber
time interval
fan
exhaust air
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
EP07016039A
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German (de)
English (en)
Other versions
EP1906095A3 (fr
EP1906095B1 (fr
Inventor
Herbert BERKENKÖTTER
Ulrich Dr. Sillmen
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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 Miele und Cie KG filed Critical Miele und Cie KG
Priority to PL07016039T priority Critical patent/PL1906095T3/pl
Publication of EP1906095A2 publication Critical patent/EP1906095A2/fr
Publication of EP1906095A3 publication Critical patent/EP1906095A3/fr
Application granted granted Critical
Publication of EP1906095B1 publication Critical patent/EP1906095B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24C15/2021—Arrangement or mounting of control or safety systems
    • 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
    • F24C15/2007—Removing cooking fumes from oven cavities
    • 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
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
    • 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
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/087—Arrangement or mounting of control or safety devices of electric circuits regulating heat

Definitions

  • the invention relates to a method for controlling the exhaust air volume flow from a cooking chamber of a baking oven, wherein the exhaust air volume flow is discharged through a blower to the environment.
  • a method for controlling the exhaust air flow from a cooking chamber is known.
  • a suction fan is controlled as a function of a temperature measured during the cooking process in the vapor extraction channel.
  • the DE 102 18 792 A1 discloses a method in which by means of two temperature sensors, a time-varying temperature gradient is detected in the cooking chamber, in order then to minimize the temperature gradient via a heating of the cooking chamber.
  • this temperature is measured over a period of time, wherein a predetermined setpoint, when the temperature exceeds this setpoint, then the speed of the fan high, up to the point where the temperature falls below a predetermined setpoint, until again a temperature change is made, which is above the upper setpoint, then the control of the fan is increased again, etc.
  • the fume extraction on the cooking chamber should be operated so that the cooking chamber does not leave the cooking chamber due to overpressure at unauthorized points, supply air openings, leaks. Wrasen should leave the oven by means of a volumetric flow controllable suction only via the designated exhaust port and there possibly located oxidation catalyst.
  • a sensor according to the prior art is known, which determines how much must be extracted. The less suctioned, the lower the energy losses of the cooking appliance.
  • a disadvantage of this known from the prior art embodiment is that the required extraction has been adapted inadequate adaptation to the needs so far usually.
  • the fan speed correlates with the oven temperature. It is assumed that at high temperature more vapors in the furnace chamber is formed than at lower, and therefore must be extracted more strongly. But there is no close link to the actual needs.
  • a disadvantage of the type of fan speed control it is also considered that a continuous speed control, which binds particular computing capacity in the controller.
  • the problem is to describe or provide an alternative method for controlling the exhaust air volume flow from a cooking chamber of a baking oven, which has a close coupling to the need, and manages without an additional opening in the oven.
  • a method is proposed, wherein for controlling the exhaust air volume flow from the cooking chamber of a baking oven during the cooking process in a first time interval at mutually different locations of the oven a first temperature T1 by a first temperature sensor and a second temperature T2 by a second temperature sensor substantially be measured automatically at the same time, so that the temperature difference between T1 and T2 is formed in an electrical control of the oven, and depending on the temperature difference, the speed of the fan or the opening degree of a bypass valve is determined to change the exhaust air volume flow conveyed by the fan, and in a subsequent second time interval, the thus determined rotational speed of the fan or the opening degree of the bypass valve is kept substantially constant, wherein the two time intervals are repeated alternately during the cooking process.
  • the strength of the suction is varied in the first time interval between low and heavy suction. So you start with the low suction. If the temperature difference between the two temperature sensors in the cooking chamber initially does not change, no cold kitchen room air is drawn through the supply air openings into the cooking chamber. Only when it is extracted so strongly that cold kitchen room air is drawn into the cooking chamber, the temperature difference begins to change.
  • the first temperature sensor connected to the usual temperature control for regulating the cooking chamber temperature is kept at its value by the control and the associated radiator control.
  • the second temperature sensor is influenced more or less than the first temperature sensor by the cool air that is now drawn into the cooking chamber. That is, the temperature difference between them becomes larger or smaller.
  • the degree of Wrasenabsaugung at the so-recognized point at which just cool kitchen room air is drawn into the oven is for a second time interval, for. B. over some, for example, 10 minutes, maintained as an orientation threshold, before rechecking whether the optimal extraction performance is now present, ie before again a first time interval is started.
  • a setting is stored in the electronics that determines the required fume extraction for the following second time interval as a function of this threshold. This can z. On the recognized threshold, slightly below or above it. After the second time interval, the first time interval is again started to determine the required suction for the next second time interval, etc.
  • T1 of the first temperature sensor connected to the temperature control is constant.
  • delta is equal to temperature T2 minus T1
  • T2 results in constancy.
  • a smaller difference thus corresponds to a smaller T2.
  • T1 is measured by means of a temperature sensor. This is typically located in the upper part of the cooking chamber near the grill body. With the help of T1, the temperature in the middle of the cooking chamber should be regulated to the setpoint set by the user. Since T1 is much closer to the radiator as at the middle of the cabinet, z. B. in operation T1 and cooking chamber center temperature sometimes greatly different.
  • the difference is called offset.
  • the offset is stored for each operating mode and for any desired oven temperature, ie the setpoint temperature for the cooking chamber, usually in the memory of the electronics.
  • the exhaust fan starts at the detection of the appropriate suction fan speed, at low speed or at the speed 0.
  • T2 is measured in the cooking chamber.
  • T1 and T2 are not the same.
  • T2 initially remains constant when increasing the exhaust fan speed. Due to its different geometric position relative to the radiators and to the supply air inflows in the cooking chamber, T2 normally has a value other than T1.
  • T1 remains unchanged during the change in the exhaust fan speed, or in other words, the heating control is running so that T1 remains constant, which is the task of the oven temperature control.
  • T2 remains at the starting value at low blower speed as long as no cold air is sucked through openings in the cooking chamber into the cooking chamber.
  • the temperature changes T2.
  • the delta between T2 and T1 changes.
  • the change in the delta is positive or negative. The sign of the change is unimportant for the recognition of the required suction power. All that matters is to recognize the change in the delta between T2 and T1.
  • the principle for the detection of the searched threshold is thus, first observation of a suction blower independent T2 value; at the desired exhaust power during the increase of the fan speed, a change of T2 from its start value, which was at the low start fan speed at the beginning of the respective detection time interval, as the respective first time interval, begins. How strong the deviation from the initial value must be, so that the deviation is definitively and reliably recognized as a change, is state of the art. You could z. B. set, with 10% deviation from the stable T2 initial value, ie from the T2 start value, this is detected as a change. The threshold was then exceeded, it is so strongly sucked that cold air into the oven is sucked. It is sucked off so much that in the cooking chamber no overpressure caused by the vapor. The expected temperature difference change depends on the operating mode, the oven temperature T1 and the mounting locations of the temperature sensors for the measurement of T 1 and T2.
  • the particularly advantageous effect which ensures a demand-adapted fume extraction with the lowest possible energy consumption and optimum extraction, is achieved by arranging only one additional temperature sensor of known type within the cooking chamber without additional measuring openings in the cooking chamber for the purpose of sensing.
  • the temperature difference between the two temperatures T1 and T2 is formed for the first time after the expiration of a predetermined heating during the cooking process and the duration of the first time interval selected so short that the temperature difference between T1 and T2 in the cooking chamber at a constant exhaust air volume flow remains substantially constant during the first time interval.
  • the speed of the fan is during the first time interval, starting from a low speed, in which only part of the resulting during cooking steam as exhaust air volume flow through the blower to the environment is increased automatically or continuously in stages until the temperature difference between T1 and T2 is not equal to a measured at the beginning of the first interval start temperature difference, T1 minus T2 or T2 minus T1, and that depending on the last speed, the speed of the fan or the opening degree of a bypass door for the second time interval is set automatically.
  • the temperature T1 of the cooking chamber exhaust air is advantageously measured with the first temperature sensor and the temperature T2 in the lower cooking chamber region with the second temperature sensor.
  • the temperature T1 is kept substantially constant by means of a cooking chamber heating and a temperature control during the first time interval.
  • an oven for carrying out the method in which a second temperature sensor for measuring a second temperature T2 of the cooking chamber is arranged to control the exhaust air volume flow to or in the oven, wherein the two temperature sensors are arranged such that the Temperatures T1 and T2 at two different locations of the cooking chamber can be detected, and that in the evaluation of the two temperatures T1 and T2, a temperature difference can be determined, and depending on the speed of the blower or the opening degree of a arranged in the exhaust passage bypass valve, the is in signal transmission connection with the electrical control, is automatically adjustable.
  • the first temperature sensor in the upper region of the cooking chamber and the second temperature sensor in the lower region of the cooking chamber are arranged in an advantageous manner.
  • the first temperature sensor cooperates with the cooking chamber heating in such a way that the temperature T1 can be regulated substantially to a constant value during the first time interval.
  • the first temperature sensor 9 is arranged in the upper region of the cooking chamber.
  • the second temperature sensor 10 is arranged at a location other than the first temperature sensor 9 in the cooking chamber, for detecting a temperature difference delta T between the two temperature sensors 9 and 10.
  • the electronics 6 for varying the exhaust air volume flow 1 is state of the art and can, for example, the speed of the fan 4 or the control of the opening degree of a bypass flap 8, which is shown in Figure 2, on the suction side of the fan 4, as well is shown in the figure 3, control.
  • An inlet air opening 11 may be a structurally provided opening through which the cool kitchen room air can be drawn into the cooking chamber 2 when it is sucked out of the cooking chamber 2.
  • the supply air opening 11 may also be one or more air leaks on the oven 3, which are almost unavoidable, such as gaps in the door or lamp seal area or on the bushings for a radiator of a cooking space 12. This is shown in particular in FIG.
  • the thus determined speed of the fan 4 or the opening degree of the bypass valve 8 is kept substantially constant, the two time intervals during the cooking process alternately be repeated. Due to this design, in particular computing capacity is saved because only in the shorter time interval, the first time interval, is measured.
  • the temperature difference between the two temperatures T1 and T2 is formed here for the first time after a predetermined heating phase during the cooking process.
  • the duration of the first time interval is selected to be so short that the temperature difference between T1 and T2 in the cooking chamber 2 remains substantially constant for a constant exhaust air volume flow 1 during the first time interval.
  • the speed 5 of the blower 4 is during the first time interval, see "I" in Fig. 4, starting from a low speed, in which only a portion of the Wrasens arising during the cooking process is discharged as exhaust air volume flow 1 through the blower 4 to the environment , continuously or incrementally increased in stages until the temperature difference between T1 and T2 is not equal to a measured at the beginning of the first time interval start temperature difference.
  • the rotational speed of the blower 4 or the opening degree of the bypass damper 8 for the second time interval see the time interval between "I” and "II” in FIG. 4, are set automatically.
  • the temperature T1 of the cooking chamber exhaust air is measured here, with the second temperature sensor 10 here, the temperature T2 is measured in the lower Garraum Suite.
  • the temperature T1 is kept substantially constant by means of the cooking chamber heating 12 and a temperature control during the first time interval.
  • FIG. 4 it is shown how the exhaust air volumetric flow 1 and the differential temperature between T1 and T2 change during the first time interval over time. See also “I” and “II” in Fig. 4. In the two examples, there is a reduction in the temperature difference by cold supply air. 7
  • FIG. 4 An exemplary course of the exhaust air volume flow 1 is shown in FIG. 4 by a curve a and the profile of the differential temperature is represented by a curve b, the course of the exhaust air volume flow 1 corresponding to the profile of the fan speed of the fan 4.
  • the fan speed and thus the exhaust air volume flow 1 starting from a low initial speed, are continuously increased. See curve a.
  • the differential temperature, curve b remains essentially constant.
  • the orientation threshold of the rotational speed of the fan 4 is found for the second time interval directly following the exemplary first time interval , This point can be seen in Fig. 4 by the incipient drop in the differential temperature, curve b. While at low Wrasenanfall in the cooking chamber 2 for the orientation threshold a relatively low fan speed or a relatively low exhaust air volume flow 1 results, the orientation threshold is at a large Wrasenanfall in the cooking chamber 2 and thus the fan speed higher, see Fig. 4.
  • the invention also relates to a baking oven 3 for carrying out the method according to the invention.
  • the oven 3 comprises a fan 4 for discharging exhaust air 1 from the cooking chamber 2 by an exhaust duct to the environment, and an electric control 6 with an evaluation circuit and a memory which is in signal transmission connection with the first temperature sensor 9 and the fan 4.
  • a second temperature sensor 10 for measuring a second temperature T2 of the cooking chamber is arranged to control the exhaust air volume flow 1 on or in the oven, wherein the temperature sensors 9 and 10 are arranged such that the temperatures T1 and T2 at two different locations of the cooking chamber.
  • a temperature difference can be determined, and depending on the speed 5 of the blower 4 or the degree of opening of a arranged in the exhaust passage bypass valve 8, which is in signal communication with the electrical control 6, automatically adjustable.
  • the first temperature sensor 9 is arranged in the upper region of the cooking chamber 2 and the second temperature sensor 10 in the lower region of the cooking chamber 2.
  • the first temperature sensor 9 interacts with the cooking chamber heating 12 in such a way that the temperature T1 is regulated substantially to a constant value during the first time interval.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Stoves And Ranges (AREA)
  • Electric Ovens (AREA)
EP07016039.5A 2006-09-14 2007-08-16 Procédé destiné au réglage du débit d'air d'un compartiment d'un four Not-in-force EP1906095B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07016039T PL1906095T3 (pl) 2006-09-14 2007-08-16 Sposób regulowania strumienia objętości powietrza wywiewanego z komory gotowania piekarnika

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006044039A DE102006044039B3 (de) 2006-09-14 2006-09-14 Verfahren zur Regelung des Abluftvolumenstroms aus einem Garraum eines Backofens

Publications (3)

Publication Number Publication Date
EP1906095A2 true EP1906095A2 (fr) 2008-04-02
EP1906095A3 EP1906095A3 (fr) 2011-04-06
EP1906095B1 EP1906095B1 (fr) 2014-01-22

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EP07016039.5A Not-in-force EP1906095B1 (fr) 2006-09-14 2007-08-16 Procédé destiné au réglage du débit d'air d'un compartiment d'un four

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Country Link
US (1) US7699237B2 (fr)
EP (1) EP1906095B1 (fr)
DE (1) DE102006044039B3 (fr)
ES (1) ES2445458T3 (fr)
PL (1) PL1906095T3 (fr)

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CN109863823A (zh) * 2016-10-17 2019-06-07 克劳斯玛菲科技有限公司 用于制造具有半成品的成型件的方法和装置
CN112856526A (zh) * 2021-01-20 2021-05-28 宁波方太厨具有限公司 吸油烟机的风量自适应调节方法及吸油烟机

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ITAN20110110A1 (it) * 2011-08-10 2013-02-11 Safir S R L Cappa a condensazione per forni industriali, provvista di controllo di accensione e spegnimento.
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US9427107B2 (en) 2011-09-13 2016-08-30 Iot Controls Llc Automated temperature control system for a solid-fueled cooker
ES2426018B1 (es) * 2012-04-18 2014-05-13 Arturo Bernal Granero Sistema de control y regulación de la temperatura para hornos de cocción de leña y carbón y horno adaptado
US10119708B2 (en) * 2013-04-23 2018-11-06 Alto-Shaam, Inc. Oven with automatic open/closed system mode control
US9841261B2 (en) * 2013-04-29 2017-12-12 Alto-Shaam, Inc. Combination oven with peak power control
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US10918112B2 (en) 2013-05-23 2021-02-16 Duke Manufacturing Co. Dough preparation apparatus and methods
US9357787B2 (en) 2013-06-27 2016-06-07 Middleby Marshall Holdings Llc Forced moisture evacuation for rapid baking
EP3049727A1 (fr) * 2013-09-27 2016-08-03 Arçelik Anonim Sirketi Four de cuisson possédant un ventilateur de refroidissement et procédé amélioré de commande du ventilateur de refroidissement du four de cuisson
CN104373984B (zh) * 2014-11-19 2017-08-18 江苏元升厨卫电器有限公司 集成灶烟道防火装置
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CN104698894B (zh) * 2015-03-16 2017-10-31 广东威灵电机制造有限公司 一种抽油烟机的恒风量输出控制方法和系统
CN104698893B (zh) * 2015-03-16 2017-10-31 广东威灵电机制造有限公司 一种抽油烟机的恒风量输出控制方法和系统
CN104747487B (zh) * 2015-03-16 2016-08-31 广东威灵电机制造有限公司 一种抽油烟机的恒风量输出控制方法和系统
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Publication number Priority date Publication date Assignee Title
CN109863823A (zh) * 2016-10-17 2019-06-07 克劳斯玛菲科技有限公司 用于制造具有半成品的成型件的方法和装置
CN109863823B (zh) * 2016-10-17 2021-11-02 克劳斯玛菲科技有限公司 用于制造具有半成品的成型件的方法和装置
CN112856526A (zh) * 2021-01-20 2021-05-28 宁波方太厨具有限公司 吸油烟机的风量自适应调节方法及吸油烟机
CN112856526B (zh) * 2021-01-20 2022-05-17 宁波方太厨具有限公司 吸油烟机的风量自适应调节方法及吸油烟机

Also Published As

Publication number Publication date
PL1906095T3 (pl) 2014-05-30
US7699237B2 (en) 2010-04-20
ES2445458T3 (es) 2014-03-03
EP1906095A3 (fr) 2011-04-06
EP1906095B1 (fr) 2014-01-22
US20080066661A1 (en) 2008-03-20
DE102006044039B3 (de) 2007-12-27

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