WO2006045634A1 - Treibmittel-vakuumpumpe - Google Patents
Treibmittel-vakuumpumpe Download PDFInfo
- Publication number
- WO2006045634A1 WO2006045634A1 PCT/EP2005/011660 EP2005011660W WO2006045634A1 WO 2006045634 A1 WO2006045634 A1 WO 2006045634A1 EP 2005011660 W EP2005011660 W EP 2005011660W WO 2006045634 A1 WO2006045634 A1 WO 2006045634A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vacuum pump
- propellant
- pump according
- propellant vacuum
- nozzle
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F9/00—Diffusion pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/006—Micropumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
- F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
Definitions
- the invention relates to a miniaturized propellant vacuum pump, which uses a preferably structured by microsystem technologies planar nozzle and pump wall geometry and a gelei nes propellant for vacuum generation. It is characterized by simple manufacturability, small size and thus good integration possibilities, e.g. in mobile systems, operating in a pressure range from about one atmosphere to a few pascals, high suction power and position-independent function.
- Sorption pumps, condensers, cryopumps and propellant pump are suitable for use within a certain pressure range; to generate a prespecified pressure, it may be necessary to operate several of these pumps in succession.
- the size of these conventional vacuum pumps in their smallest designs is still in the range of a few tens of cubic centimeters. Therefore, these pumps can not be usefully integrated into systems with micro-assemblies (eg sensors).
- micro-assemblies eg sensors.
- miniaturized analyzers which require a vacuum or a constant gas flow for their function is therefore closely linked to the development of suitable micro-gas pumps.
- Micro-pumps use different physical or chemical principles to create a pumping action (see: Nam-Trung Nguyen, Xiaoyang Huang, Toh Kok Chuan, MEMS).
- Micropumps A Review, Transactions of the ASME, Vol. 124 (June 2002), 384-392; P. Woias, Micropumps - summarizing the first two decades, Proc. SPIE, Vol. 4560 (2001), 39-52). Many of the systems implemented in this way are limited in their application to liquid media; only some are suitable for pumping gases or vacuum generation.
- pumps without mechanical parts can be used, which are based on the principle of the Knudsen compressor (thermal transpiration, thermal molecular press): between two voids of different temperature, which are connected via a channel with a small cross-sectional area are, creates a Druckdiffe ⁇ rence, which can be exploited to generate a pumping effect ng.
- Knudsen compressor thermal transpiration, thermal molecular press
- a disadvantage is the relatively komp lit structure and the high space requirement of such systems, due to the constraint due to the low achieved compression ratio, many such pumps in series to operate to produce the desired Saug ⁇ performance and pressure difference (see: RM Young, Analysis of a micromachine based vacuum pump on a chip actuated by the thermal transpiration effect, J. Vac., See Technol.
- the micro-pump according to the invention uses the functional principle of the propellant pumps described in DIN 28 400, Part 2, which is based on the fact that a rapidly flowing vaporous or liquid propellant expands through a nozzle.
- the gas particles in the recipient to be evacuated get into this propellant jet; Here, they receive an impulse in the pumping direction through collisions with the propellant molecules.
- a special position among the propellant pumps adopts the D onfumpe on which, in contrast to the other Strahlpu mpen the mixing process of themaschinemitteis with the gas to be pumped does not take place in a turbulent boundary layer, but by diffusion of the gas in the propellant jet.
- Figure 1 Figure 1
- the pumping principle is exemplified for all propellant pumps by the structure of a diffusion pump:
- a suitable propellant e.g., silicone oil
- the heater 11 In the bedding compartment 12, a suitable propellant (e.g., silicone oil) is heated by the heater 11; the resulting propellant vapor
- the propellant vapor jet 17 condenses on the cooled walls of the pump body 16 and is returned to the reservoir 12.
- the gas molecules retain their momentum and enter the steam jet of the next lower nozzle stage.
- the gas is discharged via the Vorvakuumstutzen 13 by means of a backing pump.
- the pumped gas will increase from level to level
- the novelty of the invention lies in the implementation of the principle in miniaturized, preferably in a microsystem adequate planar shape. This results in exploiting the miniaturization of a number of other advantages.
- This is at the
- Propellant vacuum pump consisting of an evaporator chamber at high pressure and a pumping chamber at low pressure, separated ge by a nozzle arrangement, provided that the pumping effect by a flow at high speed by a preferably planar arrangement of vertically verlau ⁇ in depth fenden nozzles between two parallel plates is achieved, which close the chambers through the nozzle area. Furthermore, an opening in the pumping chamber above the nozzle arrangement for sucking the medium to be pumped and an opening for expelling the compressed gas below the nozzle arrangement are provided.
- a planar nozzle arrangement of e.g. One or two Laval nozzles per nozzle stage is used to expand a pressurized liquid, gas or vapor propellant and optionally accelerate to supersonic speed. As a result, the nozzle flow can reach supersonic speed.
- the propellant vacuum pump can be used even at high pressures from about one atmosphere due to the small dimensions. By selecting the number of mutually arranged nozzles and da ⁇ with pressure levels high compression ratios can be achieved. - -
- the working pressure range can be varied over wide ranges.
- the blowing agent used is a condensable medium or a gaseous medium.
- a liquid is used as the propellant, wherein in one embodiment the liquid propellant is vaporized in a heater arranged in the evaporator chamber in the form of an electrically heated coil. Alternatively, the propellant is already introduced in gaseous form into the evaporator chamber.
- the increased pressure of the propellant within the nozzle assembly can be achieved either by suitable measures outside the micro-pump or in vaporous propellant with a heater integrated in the pump and evaporator of a liquid.
- the scaling of the dimensions of the pump up to the range of the free path length of the gas molecules in the respective pressure range makes it possible to operate in a pressure range from about one atmosphere to several pascals.
- a particulate filter can be integrated. Such a filter can also be used or integrated in the inlet and outlet at the inlet and outlet of the evaporator chamber.
- Blowing agents are condensed on the pump walls and possibly returned to the integrated in the pump heater. There it is again vaporized and thus transferred into a propellant circuit in order to allow a closed and externally supplied with energy for the heater system.
- the vacuum pump is additionally provided with a cooling of the outer wall of the pump chamber.
- the condensation of the vaporous blowing agent may e.g. via ducts or cooling fins provided in the walls, which are filled with a liquid or a gas or air and remove the heat from the side walls used for the condensation; Alternatively, Peltier elements can also be used for this purpose.
- a pressure measurement is integrated.
- several pressure sensors can be integrated into the pump. These pressure sensors can be mounted in the pump chamber on the high-vacuum side and the fore-vacuum side, as well as in the evaporator chamber, and can also detect the differential pressure between the measurement points mentioned above by means of suitable control measures.
- a pressure sensor can be used, for example, as a pressure sensor.
- a system based on the Pirani principle which measures the pressure-dependent thermal conductivity of the surrounding medium (see: Wutz, Adam, Walcher, Theory and Practice of Vacuum Technology, Viehau Verlag Braunschweig, 5th Edition (1992); Mastrangelo Muller,
- a flow measurement based on, for example, the intake manifold (intake region) and / or the outlet may be provided. carried out on a realized in micro system technology Schudraht270.
- the structure of the invention consists, for example, of three substrates, of which the middle contains the nozzle structures and extends through one _ _
- high thermal conductivity is characterized in order to facilitate the vapors of a liquid propellant and the condensation.
- the system or the medium vacuum vacuum is made up of three substrates, the middle substrate of which, because of its good heat conduction, mechanical and chemical stability and structurability, is a silicon, preferably structured with anisotropic plasma etching, and the silicon Both sides closing substrates preferably made of anodic bonded glass because of its low thermal conductivity.
- a us a galvanisch if the middle substrate because of its good heat conduction, a us a galvanisch.
- Metallstruk ⁇ tur consists, preferably galvanically grown on a Unte ⁇ Ren glass substrate and an upper glass substrate as Verschl uss.
- the two outer substrates may contain required connection channels and, if necessary, as a carrier for the Dru ck or to be integrated
- Flow sensors serve and close the evaporator chamber and the pump room.
- substrates silicon, preferably anisotropically structured, and borosilicate glass can serve as well as galvanically deposited metal structures and glass substrates or else because of their good chemical and mechanical stability
- Injection molding produced structures and polymer substrates.
- the propellant vacuum pump according to the invention is preferably closed with polymer substrates, and the nozzle arrangement is also closed by means of e.g. produced by injection molding
- the small size of the micro-propellant pump produces the following advantages:
- the invention can be used as a pump for existing or future-developed miniaturized systems, without unnecessarily increasing their design.
- micro-propellant pump can be used by its small internal dimensions from a pressure of about one atmosphere and sen depending on the design with several Dü senstu ⁇ and a suitable propellant reach a final pressure of up to a few pascals.
- the micro-propellant pump consists of a silicon substrate structured by plasma etching and two borosilicate glass substrates anodically bonded thereon as cover at the top and bottom, one of which has access from outside into the evaporator chamber for the external supply of a drug.
- FIG. 2 Such a system is shown by way of example in FIG. 2 (FIG. 2).
- a vaporous blowing agent is expelled, which expands through the nozzles 5 and impulses the gas molecules on the high-vacuum side 6 or in one transmits via a channel 7 connected volume.
- the propellant condenses on the water-cooled side walls of the pump 3 and the pumped gas molecules pass through the pre-vacuum side 2 and the outlet 1 from the micropump.
- the side length of the system is about 15 mm.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Jet Pumps And Other Pumps (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT05803340T ATE473374T1 (de) | 2004-10-29 | 2005-10-31 | Treibmittel-vakuumpumpe |
EP05803340A EP1805420B1 (de) | 2004-10-29 | 2005-10-31 | Treibmittel-vakuumpumpe |
DE502005009877T DE502005009877D1 (de) | 2004-10-29 | 2005-10-31 | Treibmittel-vakuumpumpe |
US11/796,505 US20080075613A1 (en) | 2004-10-29 | 2007-04-27 | Motivating fluid vacuum pump |
US12/486,300 US8172548B2 (en) | 2004-10-29 | 2009-06-17 | Driving agent vacuum pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004053006A DE102004053006A1 (de) | 2004-10-29 | 2004-10-29 | Treibmittelpumpe in Mikrosystemtechnik |
DE102004053006.8 | 2004-10-29 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/796,505 Continuation US20080075613A1 (en) | 2004-10-29 | 2007-04-27 | Motivating fluid vacuum pump |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006045634A1 true WO2006045634A1 (de) | 2006-05-04 |
Family
ID=35538743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/011660 WO2006045634A1 (de) | 2004-10-29 | 2005-10-31 | Treibmittel-vakuumpumpe |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080075613A1 (de) |
EP (1) | EP1805420B1 (de) |
AT (1) | ATE473374T1 (de) |
DE (2) | DE102004053006A1 (de) |
WO (1) | WO2006045634A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6119566B2 (ja) * | 2012-12-27 | 2017-04-26 | 株式会社デンソー | エジェクタ |
US10037869B2 (en) | 2013-08-13 | 2018-07-31 | Lam Research Corporation | Plasma processing devices having multi-port valve assemblies |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0476157A1 (de) * | 1990-03-14 | 1992-03-25 | Nauchno-Proizvodstevennoe Obiedenenie "Vakuummashpribor" | Dampfstrahlvakuumpumpe |
DE20120138U1 (de) * | 2001-12-12 | 2002-02-28 | Festo Ag & Co | Vakuumerzeugervorrichtung |
US20020176802A1 (en) * | 2001-05-24 | 2002-11-28 | Chen-Kuei Chung | Microfluid driving device |
US20040179946A1 (en) * | 2003-01-16 | 2004-09-16 | Gianchandani Yogesh B. | Packaged micromachined device such as a vacuum micropump, device having a micromachined sealed electrical interconnect and device having a suspended micromachined bonding pad |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3310227A (en) * | 1965-04-12 | 1967-03-21 | Milleron Norman | Surge and backstreaming porous diaphragm filter for vacuum system |
US3275221A (en) * | 1965-05-27 | 1966-09-27 | Varian Associates | Automatic high vacuum system |
US4251713A (en) * | 1978-04-21 | 1981-02-17 | Varian Associates, Inc. | Electric heater assembly for diffusion pumps |
US5038852A (en) * | 1986-02-25 | 1991-08-13 | Cetus Corporation | Apparatus and method for performing automated amplification of nucleic acid sequences and assays using heating and cooling steps |
DE69106240T2 (de) * | 1990-07-02 | 1995-05-11 | Seiko Epson Corp | Mikropumpe und Verfahren zur Herstellung einer Mikropumpe. |
US5347876A (en) * | 1992-01-07 | 1994-09-20 | Gas Research Institute | Gas flowmeter using thermal time-of-flight principle |
-
2004
- 2004-10-29 DE DE102004053006A patent/DE102004053006A1/de not_active Withdrawn
-
2005
- 2005-10-31 WO PCT/EP2005/011660 patent/WO2006045634A1/de active Application Filing
- 2005-10-31 DE DE502005009877T patent/DE502005009877D1/de active Active
- 2005-10-31 AT AT05803340T patent/ATE473374T1/de not_active IP Right Cessation
- 2005-10-31 EP EP05803340A patent/EP1805420B1/de not_active Not-in-force
-
2007
- 2007-04-27 US US11/796,505 patent/US20080075613A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0476157A1 (de) * | 1990-03-14 | 1992-03-25 | Nauchno-Proizvodstevennoe Obiedenenie "Vakuummashpribor" | Dampfstrahlvakuumpumpe |
US20020176802A1 (en) * | 2001-05-24 | 2002-11-28 | Chen-Kuei Chung | Microfluid driving device |
DE20120138U1 (de) * | 2001-12-12 | 2002-02-28 | Festo Ag & Co | Vakuumerzeugervorrichtung |
US20040179946A1 (en) * | 2003-01-16 | 2004-09-16 | Gianchandani Yogesh B. | Packaged micromachined device such as a vacuum micropump, device having a micromachined sealed electrical interconnect and device having a suspended micromachined bonding pad |
Also Published As
Publication number | Publication date |
---|---|
ATE473374T1 (de) | 2010-07-15 |
EP1805420B1 (de) | 2010-07-07 |
EP1805420A1 (de) | 2007-07-11 |
DE102004053006A1 (de) | 2006-05-04 |
DE502005009877D1 (de) | 2010-08-19 |
US20080075613A1 (en) | 2008-03-27 |
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