EP2154439B1 - Volume flow regulator, in particular for air conditioning and ventilation devices - Google Patents

Volume flow regulator, in particular for air conditioning and ventilation devices Download PDF

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Publication number
EP2154439B1
EP2154439B1 EP08013967A EP08013967A EP2154439B1 EP 2154439 B1 EP2154439 B1 EP 2154439B1 EP 08013967 A EP08013967 A EP 08013967A EP 08013967 A EP08013967 A EP 08013967A EP 2154439 B1 EP2154439 B1 EP 2154439B1
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EP
European Patent Office
Prior art keywords
volume flow
flow regulator
flow
regulator according
wall
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EP08013967A
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German (de)
French (fr)
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EP2154439A1 (en
Inventor
Thomas Dr. Sefker
Gregor Baumeister
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Gebrueder Trox GmbH
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Gebrueder Trox GmbH
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Priority to PT08013967T priority Critical patent/PT2154439E/en
Priority to PL08013967T priority patent/PL2154439T3/en
Priority to ES08013967T priority patent/ES2378286T3/en
Priority to EP08013967A priority patent/EP2154439B1/en
Priority to AT08013967T priority patent/ATE539302T1/en
Application filed by Gebrueder Trox GmbH filed Critical Gebrueder Trox GmbH
Priority to DK08013967.8T priority patent/DK2154439T3/en
Publication of EP2154439A1 publication Critical patent/EP2154439A1/en
Publication of EP2154439B1 publication Critical patent/EP2154439B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/029—Duct comprising an opening for inspection, e.g. manhole

Definitions

  • the invention relates to a volumetric flow controller, in particular for air conditioning and ventilation systems, according to the preamble of claim 1.
  • a volumetric flow controller is made FR 2 644 243 known.
  • volumetric flow controllers are known.
  • the control valve is pivoted under the action of the fluid flowing against the control valve against a restoring force from an open position to a closed position and swung back at decreasing volume flow of the flowing medium by the restoring force back into the open position.
  • Such volumetric flow controllers work mechanically automatically, because the flow-related control valve torque is compensated by the restoring force, which is usually generated by a spring.
  • the pivot position of the control valve changes, so that the volume flow is automatically controlled in the flow channel.
  • volumetric flow controller with actuators are also known volumetric flow controller with actuators.
  • a disadvantage of known volumetric flow controllers is that at low valve closing angles of about 15 ° only a small restriction can be achieved, but with increasing valve closing angles, the throttle effect increases sharply.
  • the object of the invention is to avoid the aforementioned disadvantages and to provide a volumetric flow controller, the throttle effect increases more uniformly with increasing flap closing angle.
  • the cross section of the channel can be square or round.
  • the flow barrier can be configured circumferentially. But it is also quite possible that, for example, in the case of quadrangular channels, a flow barrier is arranged only in the region of one side.
  • the flow barrier can be arranged on the outside, ie in contact with the inside of the channel wall, and thus at least partially surround the control flap. In order to the butterfly valve is about as large as the free remaining flow area in the flow barrier area. If the channel has a round configuration, the annular flow barrier completely surrounds the control flap. In another embodiment, for example in a rectangular configuration of the channel, only a partial enclosure of the control flap through the flow barrier is possible.
  • the flow barrier can be arranged on the inside and be enclosed by the, in particular ring-shaped, control flap.
  • the flow barrier is mounted on the same shaft as the control flap.
  • the flow barrier is also mounted pivotably.
  • the volume flow controller according to the invention can be operated on the one hand like an already known volume flow controller.
  • the flow barrier and the control flap can be pivoted equally. However, if only the control flap and not the flow barrier is pivoted, on the other hand, the aforementioned advantages in terms of throttling can be achieved.
  • the control flap can be changed by means of an actuator, for example by means of a motor, in their orientation.
  • the volumetric flow regulator has a measuring device for detecting differential pressures of the medium flowing in the flow channel with at least two discharge openings arranged at a distance one behind the other in the flow direction on. Since the measuring device is integrated directly in the volumetric flow controller, so that the volume flow controller according to the invention due to the short length a compact design. Due to the short length only a small space is needed, so that such flow regulators are particularly suitable, for example, for use in laboratory fume hoods. By means of the measuring device differential pressures in flow channels are determined. The measuring device has two discharge openings arranged one behind the other at a mutual distance in the flow direction. From the determined pressure difference, which is a measure of the flow per unit time, for example, the volume flow or the flow rate can be determined.
  • the measuring device can be connected to the actuating drive with a signal acting evaluation and / or control device.
  • the evaluation device may be a display such as e.g. a pressure gauge, be provided which indicates the pressure difference. But it can also be used transmitters that convert the determined pressure difference into an electrical signal, which is then optionally forwarded to a control device.
  • the measuring device determines a pressure difference and from this an actual value is determined. If a control device is provided, the actual value is compared with a stored setpoint. In the event of deviations, the actuator receives a corresponding signal via a data connection.
  • the flow barrier which reduces the flow cross section by a partial area, is arranged between the removal openings.
  • the flow barrier may be formed as a circumferential aperture provided on the edge of the channel wall, whose outer edge is sealed off from the channel wall.
  • At the inner edge of the aperture may be provided both on the outflow side and in the direction of the adjacent channel wall facing circumferential annular wall which each form together with the diaphragm and the channel wall on and a downstream and annular chamber, wherein the on the inlet or outflow-side free edge of the walls, at least in partial areas distributed along the circumference, in particular on the entire circumference to form a completely circumferential gap, is spaced from the inside of the channel wall.
  • Each of these chambers has at the inflow or outflow-side free edge of the wall either over the entire circumference of a circumferential gap between the wall and the channel wall. But it is also quite possible that the wall is in some areas in contact with the duct wall. But then at least over the circumference distributed portions of the inflow or outflow-side free edge of the wall are spaced from the channel wall.
  • the removal openings in the horizontal orientation of the channel are to be arranged in the upper region, so that even with a collection of dirt particles or condensate in the lower region via the removal opening, the pressures can be determined at any time.
  • the shape of the upstream and downstream wall is to be determined so that a pressure difference can be measured.
  • the inflow-side wall viewed at least in a partial region in the flow direction, can be designed to converge in a funnel-like manner while reducing the free flow cross-section.
  • the contour of the upstream wall can be curved at least in a partial area. But there are also other contours possible.
  • the region of the downstream wall adjoining the inner edge of the diaphragm is designed as a cylinder which is bent at its free end in the direction of the duct wall.
  • the free end can be angled away from one another approximately at right angles to the cylinder in the direction of the channel wall or else in a funnel-like manner in the flow direction.
  • the free end can be angled away from one another approximately at right angles to the cylinder in the direction of the channel wall or else in a funnel-like manner in the flow direction.
  • a collar may be formed, which may protrude either only on one side of the panel or on both sides. This edge serves as adjustment and alignment, so that an unwanted tilt is avoided.
  • Other embodiments are of course conceivable.
  • a groove into which the outer edge of the aperture is introduced can be formed from two mutually klippsten channel sections.
  • a stop consisting of two partial areas is provided on the inside of the channel wall, against which the control flap rests with its edge area in the closed position. If each subregion extends approximately over half of the circumference, it makes sense if the subregions are approximately at the thickness of the Control valve are arranged offset from each other so that the control valve can assume an open position in which the control flap is aligned approximately parallel to the flow direction. Each partial area of the stop corresponds approximately to the area of the circumference of the channel to be sealed by the respective half of the control flap.
  • the single FIGURE shows a volumetric flow regulator with a channel 2 having a channel wall 1 inside a swivel-mounted control flap 5 on a shaft 4 arranged transversely to the flow direction 3.
  • the shaft 4 divides the control flap 5 into two control flap parts of approximately equal size.
  • the shaft 4 is located in the plane of the control flap 5 or is attached directly to the side of the control flap 5.
  • a flow barrier 6 which reduces the flow cross section of the channel 2 by a partial region is provided.
  • the shaft 4 of the control flap 5 is arranged in the region of the reduced flow cross section.
  • the flow barrier 6 is arranged on the outside and thus encloses the control flap 5 completely.
  • the flow barrier 6 is stationary.
  • the flow barrier 6 is formed as a peripherally provided on the channel wall 1 circumferential aperture 7, whose outer edge is sealed against the channel wall 1.
  • a circumferential annular wall 8 pointing in the direction of the adjacent channel wall 1, 9 is provided, each forming together with the diaphragm 7 and the channel wall 1 each on and downstream and annular chamber 10, 11.
  • the inflowing or outflow-side free edge of the wall 8, 9 is spaced from the inside of the channel wall 1 in partial regions 12, 13 distributed along the circumference.
  • the respective free edge of the wall 8, 9 also has a supporting function. But it is also quite possible that at least a portion 12, 13 is formed as each extending over the entire circumference, circumferential gap.
  • the inflow-side wall 8, seen in the flow direction 3, is designed to converge in a funnel-like manner at least at a partial region 8a while reducing the free flow cross-section.
  • the adjacent to the inner edge of the aperture 7 region 9a of the downstream wall 9 is formed as a cylinder which is angled at its free end 9b in the direction of the channel wall 1.
  • the wall 9 can also be configured differently.
  • the free end 9b-like the partial region 8a- is formed like a funnel-like curve.
  • the wall 9 seen along its entire length in the flow direction 3 can be designed to taper apart.
  • each have a removal opening 14, 15 of a measuring device is arranged. This can be in the respective chamber 10, 11 itself adjusting pressure determined and a corresponding differential pressure can be determined.
  • the removal openings 14, 15 are connected to an evaluation and / or control device, not shown. This acts on an actuator, also not shown, which is in communication with the control valve 5, with a signal corresponding to the specific pressure difference.
  • the control flap 5 rests with its edge region on a stop 16, which is located in the region of the reduced flow cross-section. Due to the central arrangement of the shaft 4, the stop 16 is divided into two parts, wherein the one half of the control flap 5 rests against the one partial area 16a of the stop 16 and the other half of the control flap 5 against the other partial area 16b of the stop 16.
  • the stop 16 is integrally formed on the channel 2.
  • Each portion 16a, 16b of the stop 16 corresponds approximately to the region of the circumference of the channel 2 to be sealed by the respective half of the control flap 5.
  • the two partial areas 16a, 16b of the stop 16 are approximately offset by the thickness of the control flap 5 in the direction of flow 3 to each other and arranged so that the control flap 5 can assume an open position in which the control flap 5 is aligned approximately parallel to the flow direction 3.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Lift Valve (AREA)
  • Air-Flow Control Members (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Ventilation (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The controller has a control and/or throttle flap (5) supported on a shaft (4) arranged transverse to a flow direction (3) in an inner side of a channel (2). A flow barrier (6) i.e. circular diaphragm, reduces a flow cross section around partial areas (12, 13) designed as circular gaps. The shaft is arranged in the area of the cross section. A measuring device detects difference pressure of medium flowing in the channel. The measuring device has removal openings (14, 15) arranged one behind the other in a distance in the flow direction. The flow barrier is arranged between the openings.

Description

Die Erfindung betrifft einen Volumenstromregler, insbesondere für klima- und lüftungstechnische Anlagen, gemäß dem Oberbegriff von Anspruch 1. Ein derartiger Volumenstromregler ist aus FR 2 644 243 bekannt.The invention relates to a volumetric flow controller, in particular for air conditioning and ventilation systems, according to the preamble of claim 1. Such a volumetric flow regulator is made FR 2 644 243 known.

Aus der Praxis sind beispielsweise selbsttätige Volumenstromregler bekannt. Die Regelklappe wird unter Einwirkung des die Regelklappe anströmenden Mediums gegen eine Rückstellkraft aus einer Offenstellung in eine Schließstellung verschwenkt und bei sich verringerndem Volumenstrom des strömenden Mediums durch die Rückstellkraft wieder in die Offenstellung zurückgeschwenkt. Derartige Volumenstromregler arbeiten mechanisch selbsttätig, weil das strömungsbedingte Regelklappendrehmoment durch die Rückstellkraft, die üblicherweise durch eine Feder erzeugt wird, kompensiert wird. Bei Änderung der Strömungsverhältnisse ändert sich auch die Schwenkstellung der Regelklappe, so dass so der Volumenstrom selbsttätig in dem Strömungskanal geregelt wird. Es sind aber auch Volumenstromregler mit Stelltrieben bekannt.From practice, for example, automatic volume flow controllers are known. The control valve is pivoted under the action of the fluid flowing against the control valve against a restoring force from an open position to a closed position and swung back at decreasing volume flow of the flowing medium by the restoring force back into the open position. Such volumetric flow controllers work mechanically automatically, because the flow-related control valve torque is compensated by the restoring force, which is usually generated by a spring. When changing the flow conditions, the pivot position of the control valve changes, so that the volume flow is automatically controlled in the flow channel. But there are also known volumetric flow controller with actuators.

Nachteilig bei bekannten Volumenstromreglern ist, dass bei geringen Klappenschließwinkeln von etwa 15° nur eine geringe Drosselung erzielt werden kann, jedoch bei zunehmenden Klappenschließwinkeln die Drosselwirkung stark ansteigt.A disadvantage of known volumetric flow controllers is that at low valve closing angles of about 15 ° only a small restriction can be achieved, but with increasing valve closing angles, the throttle effect increases sharply.

Aufgabe der Erfindung ist es, die vorgenannten Nachteile zu vermeiden und einen Volumenstromregler anzugeben, dessen Drosselwirkung gleichmäßiger mit steigendem Klappenschließwinkel zunimmt.The object of the invention is to avoid the aforementioned disadvantages and to provide a volumetric flow controller, the throttle effect increases more uniformly with increasing flap closing angle.

Diese Aufgabe wird durch die Merkmale von Anspruch 1 gelöst. Schon in der Offenstellung der Regelklappe ist damit in Abhängigkeit von der Ausgestaltung der Strömungsbarriere ein Druckverlust zu verzeichnen. Wird die Regelklappe aus ihrer Offenstellung mehr und mehr in ihre Schließstellung verlagert, kann bereits bei geringen Klappenschließwinkeln eine stärkere Drosselung herbeigeführt werden. Damit ergibt sich ein günstigerer Verlauf des Widerstandsbeiwerts, der sich aus dem Quotienten des Gesamtdrucks zum dynamischen Druck zusammensetzt.This object is solved by the features of claim 1. Even in the open position of the control flap so that a pressure loss is recorded as a function of the design of the flow barrier. If the control flap is moved more and more from its open position into its closed position, a stronger throttling can be brought about even at low flap closing angles. This results in a more favorable profile of the drag coefficient, which is composed of the quotient of the total pressure to the dynamic pressure.

Der Querschnitt des Kanals kann eckig oder auch rund sein. Die Strömungsbarriere kann dabei umlaufend ausgestaltet sein. Es ist aber auch durchaus möglich, dass beispielsweise bei viereckigen Kanälen nur im Bereich einer Seite eine Strömungsbarriere angeordnet ist.The cross section of the channel can be square or round. The flow barrier can be configured circumferentially. But it is also quite possible that, for example, in the case of quadrangular channels, a flow barrier is arranged only in the region of one side.

Die Strömungsbarriere kann außenseitig angeordnet, d.h. in Kontakt mit der Innenseite der Kanalwandung, sein und die Regelklappe damit zumindest teilweise umschließen. Damit ist die Regelklappe in etwa so groß wie der freie verbleibende Strömungsquerschnitt im Bereich der Strömungsbarriere. Sofern der Kanal eine runde Ausgestaltung aufweist, umschließt die ringförmig ausgebildete Strömungsbarriere die Regelklappe damit vollständig. Bei einer anderen Ausgestaltung, z.B. bei einer rechteckförmigen Ausgestaltung des Kanals, ist auch nur eine teilweise Umschließung der Regelklappe durch die Strömungsbarriere möglich.The flow barrier can be arranged on the outside, ie in contact with the inside of the channel wall, and thus at least partially surround the control flap. In order to the butterfly valve is about as large as the free remaining flow area in the flow barrier area. If the channel has a round configuration, the annular flow barrier completely surrounds the control flap. In another embodiment, for example in a rectangular configuration of the channel, only a partial enclosure of the control flap through the flow barrier is possible.

Die Strömungsbarriere kann innenseitig angeordnet sein und von der, insbesondere ringförmig ausgebildeten, Regelklappe umschlossen sein.The flow barrier can be arranged on the inside and be enclosed by the, in particular ring-shaped, control flap.

Bei einer vorteilhaften Ausgestaltung ist die Strömungsbarriere auf der gleichen Welle gelagert wie die Regelklappe. Vorzugsweise ist die Strömungsbarriere ebenfalls verschwenkbar gelagert. Damit kann der erfindungsgemäße Volumenstromregler einerseits wie ein bereits bekannter Volumenstromregler betrieben werden. Die Strömungsbarriere und die Regelklappe können gleichermaßen verschwenkt werden. Sofern jedoch nur die Regelklappe und nicht die Strömungsbarriere verschwenkt wird, können andererseits die eingangs genannten Vorteile hinsichtlich der Drosselung erzielt werden.In an advantageous embodiment, the flow barrier is mounted on the same shaft as the control flap. Preferably, the flow barrier is also mounted pivotably. Thus, the volume flow controller according to the invention can be operated on the one hand like an already known volume flow controller. The flow barrier and the control flap can be pivoted equally. However, if only the control flap and not the flow barrier is pivoted, on the other hand, the aforementioned advantages in terms of throttling can be achieved.

Die Regelklappe kann mittels eines Stelltriebes, beispielsweise mittels eines Motors, in ihrer Ausrichtung veränderbar sein.The control flap can be changed by means of an actuator, for example by means of a motor, in their orientation.

Der Volumenstromregler weist eine Messeinrichtung zur Erfassung von Differenzdrücken des in dem Strömungskanal strömenden Mediums mit zumindest zwei in Strömungsrichtung im Abstand hintereinander angeordneten Entnahmeöffnungen auf. Da die Messeinrichtung direkt in die Volumenstromregler integriert ist, kommt damit dem erfindungsgemäßen Volumenstromregler aufgrund der kurzen Baulänge eine kompakte Bauweise zu. Aufgrund der kurzen Baulänge wird nur ein geringer Platz benötigt, so dass derartige Volumenstromregler in besonderem Maße beispielsweise für den Einsatz in Laborabzugshauben geeignet sind. Mittels der Messeinrichtung werden Differenzdrücke in Strömungskanälen ermittelt. Die Messeinrichtung weist zwei in gegenseitigem Abstand in Strömungsrichtung hintereinander angeordnete Entnahmeöffnungen auf. Aus der ermittelten Druckdifferenz, die ein Maß für den Durchfluss pro Zeiteinheit ist, kann beispielsweise der Volumenstrom oder auch die Strömungsgeschwindigkeit bestimmt werden.The volumetric flow regulator has a measuring device for detecting differential pressures of the medium flowing in the flow channel with at least two discharge openings arranged at a distance one behind the other in the flow direction on. Since the measuring device is integrated directly in the volumetric flow controller, so that the volume flow controller according to the invention due to the short length a compact design. Due to the short length only a small space is needed, so that such flow regulators are particularly suitable, for example, for use in laboratory fume hoods. By means of the measuring device differential pressures in flow channels are determined. The measuring device has two discharge openings arranged one behind the other at a mutual distance in the flow direction. From the determined pressure difference, which is a measure of the flow per unit time, for example, the volume flow or the flow rate can be determined.

Die Messeinrichtung kann mit einer den Stelltrieb mit einem Signal beaufschlagenden Auswerte- und/oder Regeleinrichtung verbunden sein. Als Auswerteeinrichtung kann im einfachsten Fall eine Anzeige, wie z.B. ein Druckmanometer, vorgesehen sein, das die Druckdifferenz anzeigt. Es können aber auch Transmitter eingesetzt werden, die die ermittelte Druckdifferenz in ein elektrisches Signal umwandeln, das dann gegebenenfalls an eine Regeleinrichtung weitergeleitet wird. Durch die Messeinrichtung wird eine Druckdifferenz bestimmt und hieraus ein Istwert ermittelt. Sofern eine Regeleinrichtung vorgesehen ist, wird der Istwert mit einem hinterlegten Sollwert verglichen. Im Falle von Abweichungen erhält der Stelltrieb über eine Datenverbindung ein entsprechendes Signal.The measuring device can be connected to the actuating drive with a signal acting evaluation and / or control device. In the simplest case, the evaluation device may be a display such as e.g. a pressure gauge, be provided which indicates the pressure difference. But it can also be used transmitters that convert the determined pressure difference into an electrical signal, which is then optionally forwarded to a control device. The measuring device determines a pressure difference and from this an actual value is determined. If a control device is provided, the actual value is compared with a stored setpoint. In the event of deviations, the actuator receives a corresponding signal via a data connection.

Die den Strömungsquerschnitt um einen Teilbereich verringernde Strömungsbarriere ist zwischen den Entnahmeöffnungen angeordnet.The flow barrier, which reduces the flow cross section by a partial area, is arranged between the removal openings.

Die Strömungsbarriere kann als eine randseitig an der Kanalwandung vorgesehene umlaufende Blende ausgebildet sein, deren äußerer Rand gegenüber der Kanalwandung abgedichtet ist.The flow barrier may be formed as a circumferential aperture provided on the edge of the channel wall, whose outer edge is sealed off from the channel wall.

An dem inneren Rand der Blende kann sowohl an- als auch abströmseitig jeweils eine in Richtung der angrenzenden Kanalwandung weisende umlaufende ringförmige Wandung vorgesehen sein, die jeweils zusammen mit der Blende und der Kanalwandung je eine an- und eine abströmseitige und ringförmige Kammer bilden, wobei der an- bzw. abströmseitige freie Rand der Wandungen zumindest in entlang des Umfangs verteilten Teilbereichen, insbesondere am ganzen Umfang unter Bildung eines vollständig umlaufenden Spaltes, von der Innenseite der Kanalwandung beabstandet ist. Durch die Abdichtung des äußeren Randes der Blende gegenüber der Kanalwandung entsteht je eine abströmseitige und je eine anströmseitige Kammer mit jeweils einer Entnahmeöffnung. Jede Kammer wird von der entsprechenden Wandung, der Blende und der Kanalwandung gebildet. Jede dieser Kammern weist an dem an- bzw. abströmseitigen freien Rand der Wandung entweder über den vollständigen Umfang einen umlaufenden Spalt zwischen der Wandung und der Kanalwandung auf. Es ist aber auch durchaus möglich, dass die Wandung in einigen Bereichen mit der Kanalwandung in Kontakt ist. Dann sind aber zumindest über den Umfang verteilte Teilbereiche des an- bzw. abströmseitigen freien Randes der Wandung von der Kanalwandung beabstandet.At the inner edge of the aperture may be provided both on the outflow side and in the direction of the adjacent channel wall facing circumferential annular wall which each form together with the diaphragm and the channel wall on and a downstream and annular chamber, wherein the on the inlet or outflow-side free edge of the walls, at least in partial areas distributed along the circumference, in particular on the entire circumference to form a completely circumferential gap, is spaced from the inside of the channel wall. By sealing the outer edge of the panel relative to the channel wall is formed depending on a downstream and each on the upstream chamber, each with a discharge opening. Each chamber is formed by the corresponding wall, the aperture and the channel wall. Each of these chambers has at the inflow or outflow-side free edge of the wall either over the entire circumference of a circumferential gap between the wall and the channel wall. But it is also quite possible that the wall is in some areas in contact with the duct wall. But then at least over the circumference distributed portions of the inflow or outflow-side free edge of the wall are spaced from the channel wall.

In den Kammern selbst stellt sich der jeweilig anstehende Druck ein und es findet gleichzeitig in jeder Kammer eine Mittelung des Druckes statt. So können Druckunterschiede über den Umfang gesehen bei ungleichförmiger Anströmung des Sensors auftreten. Diese werden jedoch in der betreffenden Kammer gemittelt. Durch die an- und abströmseitige Entnahmeöffnung in der an- und abströmseitigen Kammer können dann jeweils direkt die er- und gemittelten Drücke abgegriffen und der entsprechende Differenzdruck bestimmt werden.In the chambers themselves, the respective pending pressure sets in and there is also an averaging of the pressure in each chamber. Thus, pressure differences over the circumference seen in non-uniform flow of the sensor can occur. These are however in the concerned Averaged chamber. By the inflow and outflow-side removal opening in the upstream and downstream chamber can then be tapped directly each averaged and averaged pressures and the corresponding differential pressure can be determined.

Auch bei hohem Schmutzanfall oder bei hoher Flüssigkeitsbelastung, beispielsweise in Folge von Kondensat, können nahezu unverfälschte Messergebnisse erzielt werden. So sammelt sich in die Kammern eintretender Schmutz bzw. eintretende Feuchtigkeit im unteren Bereich der jeweiligen Kammer bei horizontaler Ausrichtung des Kanals und kann insoweit allenfalls im unteren Bereich zu einem partiellen Verschließen des Spaltes zwischen der Wandung und der Kanalwandung führen, was jedoch die Druckerfassung aufgrund des ansonsten freien umlaufenden Spaltes keineswegs beeinträchtigt. Eventuell eintretende flüssige Partikel treten bei horizontaler Ausrichtung des Kanals im unteren Bereich des Spaltes wieder aus.Even with a high amount of dirt or high liquid load, for example as a result of condensate, almost unadulterated results can be achieved. So collects into the chambers entering dirt or moisture entering the lower region of the respective chamber in the horizontal orientation of the channel and may at best in the lower part lead to a partial closure of the gap between the wall and the channel wall, which, however, the pressure sensing due to otherwise free circumferential gap by no means impaired. Any incoming liquid particles emerge again when the channel is oriented horizontally in the lower part of the gap.

Vorzugsweise sind dabei die Entnahmeöffnungen bei horizontaler Ausrichtung des Kanals im oberen Bereich anzuordnen, so dass selbst bei einer Ansammlung von Schmutzpartikeln oder Kondensat im unteren Bereich über die Entnahmeöffnung die Drücke jederzeit ermittelt werden können. Die Form der an- und abströmseitigen Wandung ist dabei so zu bestimmen, dass eine Druckdifferenz gemessen werden kann.Preferably, the removal openings in the horizontal orientation of the channel are to be arranged in the upper region, so that even with a collection of dirt particles or condensate in the lower region via the removal opening, the pressures can be determined at any time. The shape of the upstream and downstream wall is to be determined so that a pressure difference can be measured.

Bei einer Ausführungsform der Erfindung kann die anströmseitige Wandung zumindest in einem Teilbereich in Strömungsrichtung gesehen trichterartig unter Verringerung des freien Strömungsquerschnittes zusammenlaufend ausgebildet sein.In one embodiment of the invention, the inflow-side wall, viewed at least in a partial region in the flow direction, can be designed to converge in a funnel-like manner while reducing the free flow cross-section.

Dabei kann die Kontur der anströmseitigen Wandung zumindest in einem Teilbereich gekrümmt ausgebildet sein. Es sind aber auch andere Konturen möglich.In this case, the contour of the upstream wall can be curved at least in a partial area. But there are also other contours possible.

Soweit es die abströmseitige Wandung betrifft, bietet sich an, wenn der an den inneren Rand der Blende angrenzende Bereich der abströmseitigen Wandung als Zylinder ausgebildet ist, der an seinem freien Ende in Richtung der Kanalwandung abgewinkelt ist.As far as the downstream wall is concerned, it is advisable if the region of the downstream wall adjoining the inner edge of the diaphragm is designed as a cylinder which is bent at its free end in the direction of the duct wall.

Dabei kann das freie Ende in etwa rechtwinklig zu dem Zylinder in Richtung der Kanalwandung oder aber trichterartig in Strömungsrichtung auseinander laufend abgewinkelt sein. Insbesondere bei der rechtwinkligen Abwinklung findet ein deutlicher Strömungsabriss im Bereich der rechtwinkligen Abwinklung der abströmseitigen Wandung statt, so dass eine hohe Druckdifferenz messbar ist.In this case, the free end can be angled away from one another approximately at right angles to the cylinder in the direction of the channel wall or else in a funnel-like manner in the flow direction. Particularly in the case of rectangular angling, there is a clear stall in the area of the right angle bend of the downstream wall, so that a high pressure difference can be measured.

An dem äußeren Rand der Blende kann ein Kragen angeformt sein, der entweder nur an einer Seite der Blende oder aber auch beidseitig vorstehen kann. Dieser Rand dient als Justier- und Ausrichthilfe, so dass eine ungewollte Schräglage vermieden wird. Andere Ausführungsformen sind natürlich denkbar. So kann beispielsweise in dem Kanal eine Nut vorgesehen sein, in die der äußere Rand der Blende eingeführt wird. Die Nut kann dabei aus zwei gegeneinander geklippsten Kanalabschnitten gebildet sein.At the outer edge of the panel, a collar may be formed, which may protrude either only on one side of the panel or on both sides. This edge serves as adjustment and alignment, so that an unwanted tilt is avoided. Other embodiments are of course conceivable. Thus, for example, be provided in the channel, a groove into which the outer edge of the aperture is introduced. The groove can be formed from two mutually klippsten channel sections.

Es bietet sich an, wenn an der Innseite der Kanalwandung ein aus zwei Teilbereichen bestehender Anschlag vorgesehen ist, an dem die Regelklappe in der Schließstellung mit ihrem Randbereich anliegt. Sofern sich jeder Teilbereich in etwa über die Hälfte des Umfanges erstreckt, bietet sich an, wenn die Teilbereiche in etwa um die Dicke der Regelklappe so zueinander versetzt angeordnet sind, dass die Regelklappe eine Offenstellung, in der die Regelklappe in etwa parallel zur Strömungsrichtung ausgerichtet ist, annehmen kann. Jeder Teilbereich des Anschlages entspricht in etwa dem durch die jeweilige Hälfte der Regelklappe abzudichtenden Bereich des Umfanges des Kanals.It is advisable if a stop consisting of two partial areas is provided on the inside of the channel wall, against which the control flap rests with its edge area in the closed position. If each subregion extends approximately over half of the circumference, it makes sense if the subregions are approximately at the thickness of the Control valve are arranged offset from each other so that the control valve can assume an open position in which the control flap is aligned approximately parallel to the flow direction. Each partial area of the stop corresponds approximately to the area of the circumference of the channel to be sealed by the respective half of the control flap.

Die einzige Figur zeigt einen Volumenstromregler mit einer im Inneren eines eine Kanalwandung 1 aufweisenden Kanals 2 auf einer quer zur Strömungsrichtung 3 angeordneten Welle 4 schwenkbar gelagerten Regelklappe 5. Bei dem dargestellten Ausführungsbeispiel teilt die Welle 4 die Regelklappe 5 in zwei in etwa gleich große Regelklappenteile. Die Welle 4 befindet sich dabei in der Ebene der Regelklappe 5 oder ist unmittelbar seitlich an der Regelklappe 5 angebracht.The single FIGURE shows a volumetric flow regulator with a channel 2 having a channel wall 1 inside a swivel-mounted control flap 5 on a shaft 4 arranged transversely to the flow direction 3. In the illustrated embodiment, the shaft 4 divides the control flap 5 into two control flap parts of approximately equal size. The shaft 4 is located in the plane of the control flap 5 or is attached directly to the side of the control flap 5.

Im Bereich der Welle 4 der Regelklappe 5 ist eine den Strömungsquerschnitt des Kanals 2 um einen Teilbereich verringernde Strömungsbarriere 6. Die Welle 4 der Regelklappe 5 ist dabei im Bereich des reduzierten Strömungsquerschnitts angeordnet. Wie der Figur zu entnehmen ist, ist die Strömungsbarriere 6 außenseitig angeordnet und umschließt damit die Regelklappe 5 vollständig. Die Strömungsbarriere 6 ist dabei feststehend.In the region of the shaft 4 of the control flap 5, a flow barrier 6 which reduces the flow cross section of the channel 2 by a partial region is provided. The shaft 4 of the control flap 5 is arranged in the region of the reduced flow cross section. As the figure shows, the flow barrier 6 is arranged on the outside and thus encloses the control flap 5 completely. The flow barrier 6 is stationary.

Bei dem dargestellten Ausführungsbeispiel ist die Strömungsbarriere 6 als eine randseitig an der Kanalwandung 1 vorgesehene umlaufende Blende 7 ausgebildet, deren äußerer Rand gegenüber der Kanalwandung 1 abgedichtet ist.In the illustrated embodiment, the flow barrier 6 is formed as a peripherally provided on the channel wall 1 circumferential aperture 7, whose outer edge is sealed against the channel wall 1.

An dem inneren Rand der Blende 7 ist sowohl an- als auch abströmseitig jeweils eine in Richtung der angrenzenden Kanalwandung 1 weisende umlaufende ringförmige Wandung 8, 9 vorgesehen, die jeweils zusammen mit der Blende 7 und der Kanalwandung 1 je eine an- und abströmseitige und ringförmige Kammer 10, 11 bilden. Der an- bzw. abströmseitige freie Rand der Wandung 8, 9 ist in entlang des Umfangs verteilten Teilbereichen 12, 13 von der Innenseite der Kanalwandung 1 beabstandet. Hierdurch kommt dem jeweiligen freien Rand der Wandung 8, 9 auch eine Stützfunktion zu. Es ist aber auch durchaus möglich, dass zumindest ein Teilbereich 12, 13 als jeweils sich über den ganzen Umfang erstreckender, umlaufender Spalt ausgebildet ist.At the inner edge of the aperture 7, both on the downstream side and in each case a circumferential annular wall 8 pointing in the direction of the adjacent channel wall 1, 9 is provided, each forming together with the diaphragm 7 and the channel wall 1 each on and downstream and annular chamber 10, 11. The inflowing or outflow-side free edge of the wall 8, 9 is spaced from the inside of the channel wall 1 in partial regions 12, 13 distributed along the circumference. As a result, the respective free edge of the wall 8, 9 also has a supporting function. But it is also quite possible that at least a portion 12, 13 is formed as each extending over the entire circumference, circumferential gap.

Wie deutlich zu erkennen ist, ist die anströmseitige Wandung 8 in Strömungsrichtung 3 gesehen zumindest an einem Teilbereich 8a trichterartig unter Verringerung des freien Strömungsquerschnitts zusammenlaufend ausgebildet.As can be clearly seen, the inflow-side wall 8, seen in the flow direction 3, is designed to converge in a funnel-like manner at least at a partial region 8a while reducing the free flow cross-section.

Der an den inneren Rand der Blende 7 angrenzende Bereich 9a der abströmseitigen Wandung 9 ist als Zylinder ausgebildet, der an seinem freien Ende 9b in Richtung der Kanalwandung 1 abgewinkelt ist.The adjacent to the inner edge of the aperture 7 region 9a of the downstream wall 9 is formed as a cylinder which is angled at its free end 9b in the direction of the channel wall 1.

Selbstverständlich kann die Wandung 9 auch anders ausgestaltet sein. So ist es beispielsweise denkbar, dass das freie Ende 9b - wie der Teilbereich 8a - trichterartig gekrümmt ausgebildet ist.Of course, the wall 9 can also be configured differently. Thus, it is conceivable, for example, that the free end 9b-like the partial region 8a-is formed like a funnel-like curve.

Auch kann die Wandung 9 auf ganzer Länge in Strömungsrichtung 3 gesehen konisch auseinander laufend ausgebildet sein.Also, the wall 9 seen along its entire length in the flow direction 3 can be designed to taper apart.

In der an- und der abströmseitigen Kammer 10, 11 ist je eine Entnahmeöffnung 14, 15 einer Messeinrichtung angeordnet. Damit kann der in der jeweiligen Kammer 10, 11 sich einstellende Druck ermittelt und ein entsprechender Differenzdruck bestimmt werden.In the on and the downstream chamber 10, 11 each have a removal opening 14, 15 of a measuring device is arranged. This can be in the respective chamber 10, 11 itself adjusting pressure determined and a corresponding differential pressure can be determined.

Die Entnahmeöffnungen 14, 15 sind mit einer nicht dargestellten Auswerte- und/oder Regeleinrichtung verbunden. Diese beaufschlagt einen ebenfalls nicht dargestellten Stelltrieb, der mit der Regelklappe 5 in Verbindung ist, mit einem der bestimmten Druckdifferenz entsprechenden Signal.The removal openings 14, 15 are connected to an evaluation and / or control device, not shown. This acts on an actuator, also not shown, which is in communication with the control valve 5, with a signal corresponding to the specific pressure difference.

In Schließposition liegt die Regelklappe 5 mit ihrem Randbereich an einem Anschlag 16 an, der sich im Bereich des reduzierten Strömungsquerschnitts befindet. Aufgrund der mittigen Anordnung der Welle 4 ist der Anschlag 16 zweigeteilt, wobei die eine Hälfte der Regelklappe 5 an dem einen Teilbereich 16a des Anschlages 16 und die andere Hälfte der Regelklappe 5 an dem anderen Teilbereich 16b des Anschlages 16 anliegt. Der Anschlag 16 ist innenseitig an dem Kanal 2 angeformt.In the closed position, the control flap 5 rests with its edge region on a stop 16, which is located in the region of the reduced flow cross-section. Due to the central arrangement of the shaft 4, the stop 16 is divided into two parts, wherein the one half of the control flap 5 rests against the one partial area 16a of the stop 16 and the other half of the control flap 5 against the other partial area 16b of the stop 16. The stop 16 is integrally formed on the channel 2.

Jeder Teilbereich 16a, 16b des Anschlages 16 entspricht in etwa dem durch die jeweilige Hälfte der Regelklappe 5 abzudichtenden Bereich des Umfanges des Kanals 2. Die beiden Teilbereiche 16a, 16b des Anschlages 16 sind in Strömungsrichtung 3 gesehen in etwa um die Dicke der Regelklappe 5 versetzt zueinander und so angeordnet, dass die Regelklappe 5 eine Offenstellung, in der die Regelklappe 5 in etwa parallel zur Strömungsrichtung 3 ausgerichtet ist, annehmen kann.Each portion 16a, 16b of the stop 16 corresponds approximately to the region of the circumference of the channel 2 to be sealed by the respective half of the control flap 5. The two partial areas 16a, 16b of the stop 16 are approximately offset by the thickness of the control flap 5 in the direction of flow 3 to each other and arranged so that the control flap 5 can assume an open position in which the control flap 5 is aligned approximately parallel to the flow direction 3.

Claims (14)

  1. Volume flow regulator, in particular for air conditioning and ventilation devices, with a control and/or throttle flap (5) pivotably supported on a shaft (4) arranged transverse to a flow direction (3) inside a channel (2) having a channel wall (1), wherein the volume flow regulator has at least one flow barrier (6) that reduces the flow cross section around a partial area and the shaft (4) is arranged in the area of the reduced flow cross section, wherein the volume flow regulator has a measuring device for capturing difference pressures of the medium flowing in the flow channel with at least two removal openings (14, 15) arranged one behind the other at a distance in the flow direction (3), characterised in that the flow barrier (6) that reduces the flow cross section around a partial area is arranged between the removal openings (14, 15).
  2. Volume flow regulator according to the previous claim, characterised in that the flow barrier (6) is arranged externally and at least partly envelops the control flap (5).
  3. Volume flow regulator according to claim 1, characterised in that the flow barrier (6) is arranged internally and enveloped by the control flap (5) which, in particular, has a ring-shaped design.
  4. Volume flow regulator according to any one of the preceding claims, characterised in that the flow barrier (6) is supported on the same shaft (4).
  5. Volume flow regulator according to claim 4, characterised in that the flow barrier (6) is pivotably supported.
  6. Volume flow regulator according to any one of the preceding claims, characterised in that the orientation of the control flap (5) can be changed by an actutor.
  7. Volume flow regulator according to claim 6, characterised in that the measuring device is connected with an evaluation and/or control device that applies a signal to the actuator.
  8. Volume flow regulator according to any one of the preceding claims, characterised in that the flow barrier (6) is designed as an aperture (7) revolving at the edge of the channel wall (1), the outer edge of which is sealed with respect to the channel wall (1).
  9. Volume flow regulator according to claim 8, characterised in that at the inner edge of the aperture (7), both at the inflow end and outflow end, one revolving ring-shaped wall (8, 9) each is provided in the direction of the adjoining channel wall (1) which, each together with the aperture (7) and the channel wall (1), forms an inflow-end and outflow-end chamber (10, 11) which is ring-shaped, wherein the inflow's or outflow's free edge of the walls (8, 9) is at a distance, at least in partial areas (12, 13) distributed along the circumference, in particular on the entire circumference simultaneously forming a fully revolving gap, from the inside of the channel wall (1).
  10. Volume flow regulator according to claim 9, characterised in that the inflow wall (8), seen at least in a partial area (8a) in the flow direction (3), is of a converging funnel-shaped design simultaneously reducing the free flow cross section.
  11. Volume flow regulator according to any one of the claims 9 or 10, characterised in that the contour of the inflow wall (8) is of a curved design at least in one partial area (8a).
  12. Volume flow regulator according to any one of the claims 9 to 11, characterised in that the area (9a) of the outflow wall (9) that adjoins the inner edge of the aperture (7), is designed as a cylinder which, at its free end (9b), is angled in the direction of the channel wall (1).
  13. Volume flow regulator according to claim 12, characterised in that the free end (9b) is at an approximately right angle to the cylinder in the direction of the channel wall (1).
  14. Volume flow regulator according to claim 12, characterised in that the free end (9b) is at an angle which, in the flow direction (3), diverges like a funnel.
EP08013967A 2008-08-05 2008-08-05 Volume flow regulator, in particular for air conditioning and ventilation devices Active EP2154439B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PL08013967T PL2154439T3 (en) 2008-08-05 2008-08-05 Volume flow regulator, in particular for air conditioning and ventilation devices
ES08013967T ES2378286T3 (en) 2008-08-05 2008-08-05 Volumetric flow regulator, especially for air conditioning and ventilation installations
EP08013967A EP2154439B1 (en) 2008-08-05 2008-08-05 Volume flow regulator, in particular for air conditioning and ventilation devices
AT08013967T ATE539302T1 (en) 2008-08-05 2008-08-05 VOLUME FLOW CONTROLLER, ESPECIALLY FOR AIR CONDITIONING AND VENTILATION SYSTEMS
PT08013967T PT2154439E (en) 2008-08-05 2008-08-05 Volume flow regulator, in particular for air conditioning and ventilation devices
DK08013967.8T DK2154439T3 (en) 2008-08-05 2008-08-05 Volume flow regulator, especially for air conditioning and ventilation systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08013967A EP2154439B1 (en) 2008-08-05 2008-08-05 Volume flow regulator, in particular for air conditioning and ventilation devices

Publications (2)

Publication Number Publication Date
EP2154439A1 EP2154439A1 (en) 2010-02-17
EP2154439B1 true EP2154439B1 (en) 2011-12-28

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EP08013967A Active EP2154439B1 (en) 2008-08-05 2008-08-05 Volume flow regulator, in particular for air conditioning and ventilation devices

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EP (1) EP2154439B1 (en)
AT (1) ATE539302T1 (en)
DK (1) DK2154439T3 (en)
ES (1) ES2378286T3 (en)
PL (1) PL2154439T3 (en)
PT (1) PT2154439E (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202022105616U1 (en) 2022-10-05 2022-10-21 Siegenia-Aubi Kg Volumetric flow controller, in particular for air conditioning and ventilation systems

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011053269A1 (en) * 2011-09-05 2013-03-07 Schako Klima Luft, Ferdinand Schad Kg Device for regulating an air volume flow
DE102013201025B4 (en) 2013-01-23 2016-10-27 Hans Schneider Elektronik GmbH Device for determining the size of a volume flow of a fluid

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Publication number Priority date Publication date Assignee Title
DE1813885A1 (en) * 1968-12-11 1970-07-02 Steinmueller Gmbh L & C Tightly closing flap for circular cylindrical channels
SE396250B (en) * 1975-04-29 1977-09-12 Stifab Ab CONTROLLER DEVICE INTENDED NOT TO BE IN A FLUID CIRCUIT, FOR EXAMPLE AIR FLOW CURRENT
FR2495798B1 (en) * 1980-12-10 1986-02-14 Comp Generale Electricite DEVICE FOR CONTROLLING A GAS FLOW
DE8902922U1 (en) * 1989-03-10 1989-11-09 Spiro Machines S.A., Bösingen Fluid line with pressure measuring unit
EP1318359B1 (en) * 2001-12-04 2010-09-08 Emil Siegwart Flow rate controller
DE20214414U1 (en) * 2002-09-18 2002-12-19 Gebrüder Trox, GmbH, 47506 Neukirchen-Vluyn Volume flow controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202022105616U1 (en) 2022-10-05 2022-10-21 Siegenia-Aubi Kg Volumetric flow controller, in particular for air conditioning and ventilation systems
WO2024074242A1 (en) 2022-10-05 2024-04-11 Siegenia-Aubi Kg Volumetric flow controller, in particular for air-conditioning and ventilation systems

Also Published As

Publication number Publication date
PL2154439T3 (en) 2012-05-31
EP2154439A1 (en) 2010-02-17
ES2378286T3 (en) 2012-04-10
DK2154439T3 (en) 2012-04-10
PT2154439E (en) 2012-03-21
ATE539302T1 (en) 2012-01-15

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