DE102005022777A1 - Differential pressure valve - Google Patents
Differential pressure valve Download PDFInfo
- Publication number
- DE102005022777A1 DE102005022777A1 DE102005022777A DE102005022777A DE102005022777A1 DE 102005022777 A1 DE102005022777 A1 DE 102005022777A1 DE 102005022777 A DE102005022777 A DE 102005022777A DE 102005022777 A DE102005022777 A DE 102005022777A DE 102005022777 A1 DE102005022777 A1 DE 102005022777A1
- Authority
- DE
- Germany
- Prior art keywords
- differential pressure
- pressure valve
- valve according
- strip
- channel
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/33—Expansion valves with the valve member being actuated by the fluid pressure, e.g. by the pressure of the refrigerant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/36—Expansion valves with the valve member being actuated by bimetal elements or shape-memory elements influenced by fluids, e.g. by the refrigerant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
- F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
- F25B2341/06—Details of flow restrictors or expansion valves
- F25B2341/063—Feed forward expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/01—Geometry problems, e.g. for reducing size
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2505—Fixed-differential control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Temperature-Responsive Valves (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Die Erfindung betrifft ein Differenzdruckventil (1), insbesondere für ein Expansionsorgan einer Kraftfahrzeugklimaanlage, zur Regelung eines Durchflusses eines Fluids in Abhängigkeit einer Druckdifferenz, die zwischen der Hochdruckseite (HD) und der Saugdruckseite (SD) des Differenzdruckventils (1) anliegt, wobei das Differenzdruckventil ein Drosselelement (3), das den Durchfluss durch eine Drosselstelle (2) regelt, aufweist und das Drosselelement (3) durch mindestens einen Blechstreifen (6) gebildet ist, der in einem Kanal (4) angeordnet ist.The invention relates to a differential pressure valve (1), in particular for an expansion element of an automotive air conditioning system, for controlling a flow of a fluid in response to a pressure difference between the high pressure side (HD) and the suction pressure side (SD) of the differential pressure valve (1), wherein the differential pressure valve a throttle element (3), which regulates the flow through a throttle point (2), and the throttle element (3) by at least one sheet metal strip (6) is formed, which is arranged in a channel (4).
Description
Die Erfindung betrifft ein Differenzdruckventil (Delta-P-Ventil), insbesondere für ein Expansionsorgan einer Kraftfahrzeugklimaanlage, gemäß dem Oberbegriff des Anspruchs 1.The The invention relates to a differential pressure valve (delta-P valve), in particular for a Expansion element of an automotive air conditioning system, according to the preamble of claim 1.
In
Nachteilig bei diesem bekannten Differenzdruckventil ist, dass ein nahezu linearer Zusammenhang zwischen dem freien Strömungsquerschnitt und der anliegenden Druckdifferenz besteht, welcher nicht in allen Anwendungsfällen erwünscht ist.adversely in this known differential pressure valve is that a nearly linear Relationship between the free flow cross-section and the adjacent Pressure difference exists, which is not desirable in all applications.
Aus
der Patentschrift
Es ist Aufgabe der Erfindung, ein verbessertes Differenzdruckventil zur Verfügung zu stellen.It Object of the invention, an improved differential pressure valve to disposal to deliver.
Diese Aufgabe wird gelöst durch ein Differenzdruckventil mit den Merkmalen des Anspruchs 1. Vorteilhafte Ausgestaltungen sind Gegenstand der Unteransprüche.These Task is solved by a differential pressure valve with the features of claim 1. Advantageous Embodiments are the subject of the dependent claims.
Erfindungsgemäß ist ein Differenzdruckventil vorgesehen, insbesondere für ein Expansionsorgan einer Kraftfahrzeugklimaanlage, zur Regelung eines Durchflusses eines Fluids in Abhängigkeit einer Druckdifferenz, die zwischen der Hochdruckseite und der Saugdruckseite des Differenzdruckventils anliegt, wobei das Differenzdruckventil ein Drosselelement, das den Durchfluss durch eine Drosselstelle regelt, aufweist, und wobei das Drosselelement durch mindestens einen Materialstreifen gebildet ist, der in einem Kanal angeordnet ist. Hierbei ist der Materialstreifen bevorzugt elastisch verformbar, wobei er sich in Abhängigkeit der Druckdifferenz verbiegen kann, so dass bei keiner oder geringer Druckdifferenz der Kanal durch den Materialstreifen verschlossen ist, während der Kanal bei ansteigender Druckdifferenz immer weiter freigegeben wird.According to the invention is a Provided differential pressure valve, in particular for an expansion of a Automotive air conditioning system, for controlling a flow of a Fluids in dependence a pressure difference between the high pressure side and the suction pressure side the differential pressure valve is applied, wherein the differential pressure valve a throttle element that regulates the flow through a throttle point, and wherein the throttle element by at least one strip of material is formed, which is arranged in a channel. Here is the Material strip preferably elastically deformable, wherein it is in dependence The pressure difference can bend, so that at no or less Pressure difference of the channel is closed by the strip of material, while the channel continues to be released as the pressure difference increases becomes.
Bevorzugt besteht der Materialstreifen zumindest teilweise aus einem Metallblech und/oder einem Bimetall, so dass insbesondere in letzterem Fall die Öffnungs- und Schließcharakteristik des Differenzdruckventils auch eine temperaturabhängige Komponente aufweist. In diesem Zusammenhang ist der Begriff "Bimetall" nicht auf eine Kombination zweier metallischer Materialien mit unterschiedlichem thermischen Ausdehnungskoeffizienten beschränkt. Vielmehr kann es sich bei dem verwendeten Material/den verwendeten Materialien beispielsweise um Kunststoffe oder auch um Formgedächtnismaterialien handeln.Prefers the strip of material consists at least partially of a metal sheet and / or a bimetal, so that in particular in the latter case, the opening and closing characteristic the differential pressure valve and a temperature-dependent component having. In this context, the term "bimetal" is not a combination of two Metallic materials with different coefficients of thermal expansion limited. Rather, it may be in the material / used Materials such as plastics or shape memory materials act.
Das erfindungsgemäße Differenzdruckventil ermöglicht durch die flexible Gestaltbarkeit der Materialstreifen, insbesondere in Hinblick auf Abmessungen, d.h. insbesondere der freien Länge im Kanal, Biegesteifigkeit und Bimetallcharakteristik, bei hohen Druckdifferenzen auf Grund des überproportional großen Strömungsquerschnitts auch eine größere Kälteleistung, so dass eine Kennlinie möglich ist, die vollständig im Bereich optimaler Betriebspunkte (COP = Coefficient of performance) verläuft. Dabei kann das Differenzdruckventil kostengünstiger sein als herkömmliche Differenzdruckventile.The inventive differential pressure valve allows by the flexible design of the material strips, in particular in In terms of dimensions, i. especially the free length in the channel, bending stiffness and Bimetallcharakteristik, with high pressure differences due to the disproportionately large flow cross section also a larger cooling capacity, so that a characteristic is possible is that completely in the area of optimal operating points (COP = coefficient of performance) runs. In this case, the differential pressure valve can be cheaper than conventional Differential pressure valves.
Der Materialstreifen ist bevorzugt mit seinem einen Ende fest an einer Kanalwand angebracht, während das andere, freie Ende in den Kanal ragt und bei der Druckdifferenz, die ein vollständiges Öffnen des Differenzdruckventils bewirkt, also bei maximalem Fluidstrom, in Richtung Kanalwand gebogen wird, an der das freie Ende oder ein größerer Bereich des Materialstreifens gegebenenfalls dann auch anliegen kann.Of the Material strip is preferably fixed to one with its one end Duct wall attached while the other, free end protrudes into the channel and at the pressure difference, the full opening of the Differential pressure valve causes, ie at maximum fluid flow, in Direction channel wall is bent, at the free end or a larger area of the If necessary, material strip can then also be present.
Der Kanal ist vorzugsweise zumindest im Bereich, in welchem der Materialstreifen angeordnet ist, mit einem rechteckförmigen Querschnitt ausgebildet.Of the Channel is preferably at least in the area in which the strip of material is arranged, formed with a rectangular cross-section.
Gemäß einer bevorzugten Ausführungsform sind zwei Materialstreifen vorgesehen, die an einander gegenüberliegenden Kanalwänden angebracht sind, wobei sie im geschlossen Zustand mit ihren freien Enden aneinander anliegen. Diese Ausgestaltung ermöglicht eine Verkürzung des Bauraums im Vergleich zu der Ausführungsform mit nur einem Materialstreifen, die jedoch kostengünstiger herstellbar ist.According to one preferred embodiment two strips of material provided on opposite sides channel walls attached, being in the closed state with their free Ends abut each other. This embodiment allows a shortening of the construction space compared to the embodiment with only one strip of material, but cheaper can be produced.
Das freie Ende liegt im geschlossen Zustand des Differenzdruckventils bevorzugt unter Vorspannung an der gegenüberliegenden Kanalwand oder an einem entsprechenden freien Ende eines zweiten Materialstreifens an, so dass ein gewisser Differenzdruck vorhanden sein muss, um das Differenzdruckventil zu öffnen. Eine leichte Vorspannung reicht jedoch aus, um ein sicheres Schließen zu ermöglichen und damit ein Rückströmen von Fluid bei ungünstigen Druckverhältnissen zu verhindern.The free end is in the closed state of the differential pressure valve preferably under Vorspan on the opposite channel wall or at a corresponding free end of a second strip of material, so that a certain differential pressure must be present to open the differential pressure valve. However, a slight bias is sufficient to allow a safe closing and thus prevent backflow of fluid under unfavorable pressure conditions.
Der Materialstreifen ist so im Kanal angebracht, dass das freie Ende desselben in Richtung Saugdruckseite ragt, so dass bei einer Rückströmung das Ventil automatisch schließt, im ganz oder teilweise geöffneten Zustand jedoch der Strömungswiderstand relativ gering ist.Of the Material strip is mounted in the channel so that the free end the same in the direction of suction pressure side protrudes, so that in a return flow the Valve closes automatically, in whole or in part open State, however, the flow resistance is relatively low.
Die flexible gesamte Materialstreifenlänge, d.h. bei zwei Materialstreifen die Summe der einzelnen Materialstreifenlängen, ist bevorzugt mindestens zweimal so groß wie die Kanalbreite. Diese Längenverhältnisse ermöglichen eine gute Funktion und ein sicheres Schließen des Differenzdruckventils.The flexible total strip length, i. with two strips of material the sum of the individual material strip lengths is preferably at least twice as big as the channel width. These aspect ratios enable a good function and a safe closing of the differential pressure valve.
Der Drosselquerschnitt ist bevorzugt bei großen Druckdifferenzen überproportional größer als bei kleinen Druckdifferenzen, so dass bei maximalem Leistungsbedarf auch ausreichend viel Fluid das Differenzdruckventil durchströmen kann.Of the Throttle cross-section is preferably disproportionately large pressure differences greater than at small pressure differences, so that at maximum power requirements also enough fluid can flow through the differential pressure valve.
Derartige Differenzdruckventile können beispielsweise als Expansionsorgan bei Kraftfahrzeug-Klimaanlagen verwendet werden. Ebenfalls ist eine Verwendung bei Wärmepumpen möglich, die nur in einer Richtung durchströmt werden sollen, wobei hier die in die Ventilfunktion integrierte Bimetallcharakteristik besondere Vorteile bietet.such Differential pressure valves can for example, as an expansion element in automotive air conditioning systems be used. Also is a use in heat pumps possible, which are to be flowed through only in one direction, here the integrated into the valve function bimetallic characteristic special Offers advantages.
Im Folgenden wird die Erfindung anhand zweier Ausführungsbeispiele unter Bezugnahme auf die Zeichnung im Einzelnen erläutert. In der Zeichnung zeigen:in the Below, the invention with reference to two embodiments with reference explained in detail on the drawing. In the drawing show:
Ein
als Expansionsorgan in einer Kraftfahrzeug-Klimaanlage dienendes
Differenzdruckventil
Steigt
bei Betrieb die Druckdifferenz zwischen Saugdruckseite SD und Hochdruckseite
HD, so verbiegen sich die Blechstreifen
Gemäß dem in
Gemäß einer Variante können, wenn auf die Temperaturabhängigkeit verzichtet werden kann, auch Blechstreifen aus anderen Materialien verwendet werden, die keine Bimetallcharakteristik aufweisen. Dies trifft natürlich auch auf das erste Ausführungsbeispiel zu.According to one Variant, if on the temperature dependence can be dispensed with, even metal strips of other materials used, which have no bimetallic characteristic. This of course also to the first embodiment to.
- 1, 101 1, 101
- DifferenzdruckventilDifferential pressure valve
- 2, 1022, 102
- Drosselstelle restriction
- 3 3
- Drosselelementthrottle element
- 44
- Kanalchannel
- 5a 5a
- festes Ende solid The End
- 5b5b
- freies Endefree The End
- 6 6
- Blechstreifen metal strip
- 103103
- Ventilstiftvalve pin
- 104 104
- Kopf head
- 105105
- Federfeather
- HD HD
- Hochdruckseite High pressure side
- SDSD
- Saugdruckseitesuction pressure side
Claims (10)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005022777A DE102005022777A1 (en) | 2005-05-12 | 2005-05-12 | Differential pressure valve |
EP06008346A EP1722175A3 (en) | 2005-05-12 | 2006-04-21 | Differential pressure valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005022777A DE102005022777A1 (en) | 2005-05-12 | 2005-05-12 | Differential pressure valve |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102005022777A1 true DE102005022777A1 (en) | 2006-11-16 |
Family
ID=36942416
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102005022777A Withdrawn DE102005022777A1 (en) | 2005-05-12 | 2005-05-12 | Differential pressure valve |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1722175A3 (en) |
DE (1) | DE102005022777A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018200368A1 (en) * | 2018-01-11 | 2019-07-11 | Robert Bosch Gmbh | Chiller with adaptive throttle |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1450663A1 (en) * | 1964-11-28 | 1969-03-20 | Vernay Laboratories | Check and pressure relief valve element |
US3822720A (en) * | 1971-03-04 | 1974-07-09 | Noyce R | Flow control assembly |
DE19620975A1 (en) * | 1996-05-24 | 1997-11-27 | Zahnradfabrik Friedrichshafen | Damping valve |
DE19650476C1 (en) * | 1996-12-05 | 1998-05-07 | Daimler Benz Ag | Hydraulic power steering system for motor vehicle |
DE19842840A1 (en) * | 1998-09-18 | 2000-03-23 | Zahnradfabrik Friedrichshafen | damping valve for automotive hydraulic servo-assisted steering operates in two directions, and can be set up with different damping characteristics |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3952535A (en) * | 1973-07-27 | 1976-04-27 | White-Westinghouse Corporation | Automatic expansion valve for refrigerant |
IT1234236B (en) * | 1988-02-26 | 1992-05-13 | Massimo Masserini | AUTOMATIC PLATES VALVES FOR THE CONTROL OF THE GAS PASSAGE, SPECIALLY FOR THE APPLICATION IN COMBUSTION ENGINES. |
JPH04324065A (en) * | 1991-04-25 | 1992-11-13 | Daikin Ind Ltd | Pressure reducing mechanism for turbo refrigerator |
DE4122141C2 (en) * | 1991-07-04 | 1999-05-27 | Porsche Ag | Exhaust pipe of an internal combustion engine |
JPH0835733A (en) * | 1994-07-22 | 1996-02-06 | Sanyo Electric Co Ltd | Air conditioner |
JP2001174076A (en) * | 1999-10-08 | 2001-06-29 | Zexel Valeo Climate Control Corp | Refrigeration cycle |
-
2005
- 2005-05-12 DE DE102005022777A patent/DE102005022777A1/en not_active Withdrawn
-
2006
- 2006-04-21 EP EP06008346A patent/EP1722175A3/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1450663A1 (en) * | 1964-11-28 | 1969-03-20 | Vernay Laboratories | Check and pressure relief valve element |
US3822720A (en) * | 1971-03-04 | 1974-07-09 | Noyce R | Flow control assembly |
DE19620975A1 (en) * | 1996-05-24 | 1997-11-27 | Zahnradfabrik Friedrichshafen | Damping valve |
DE19650476C1 (en) * | 1996-12-05 | 1998-05-07 | Daimler Benz Ag | Hydraulic power steering system for motor vehicle |
DE19842840A1 (en) * | 1998-09-18 | 2000-03-23 | Zahnradfabrik Friedrichshafen | damping valve for automotive hydraulic servo-assisted steering operates in two directions, and can be set up with different damping characteristics |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018200368A1 (en) * | 2018-01-11 | 2019-07-11 | Robert Bosch Gmbh | Chiller with adaptive throttle |
Also Published As
Publication number | Publication date |
---|---|
EP1722175A2 (en) | 2006-11-15 |
EP1722175A3 (en) | 2007-09-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20111201 |