EP0469442A1 - Dispositif pour mélanger des gaz ou des vapeurs - Google Patents

Dispositif pour mélanger des gaz ou des vapeurs Download PDF

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Publication number
EP0469442A1
EP0469442A1 EP91112386A EP91112386A EP0469442A1 EP 0469442 A1 EP0469442 A1 EP 0469442A1 EP 91112386 A EP91112386 A EP 91112386A EP 91112386 A EP91112386 A EP 91112386A EP 0469442 A1 EP0469442 A1 EP 0469442A1
Authority
EP
European Patent Office
Prior art keywords
mixing chamber
mixing
carrier gas
capillary
admixing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91112386A
Other languages
German (de)
English (en)
Other versions
EP0469442B1 (fr
Inventor
Franz Etzweiler
Norbert Neuner-Jehle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Givaudan SA
Original Assignee
Givaudan Roure International SA
L Givaudan and Co SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Givaudan Roure International SA, L Givaudan and Co SA filed Critical Givaudan Roure International SA
Publication of EP0469442A1 publication Critical patent/EP0469442A1/fr
Application granted granted Critical
Publication of EP0469442B1 publication Critical patent/EP0469442B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/10—Mixing gases with gases
    • B01F23/12—Mixing gases with gases with vaporisation of a liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/712—Feed mechanisms for feeding fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71805—Feed mechanisms characterised by the means for feeding the components to the mixer using valves, gates, orifices or openings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/06—Mixing phases by adding a very small quantity of one of the phases or microdosing
    • B01F23/061—Adding a small quantity or concentration of an additional phase in a main phase, e.g. acting as a carrier phase

Definitions

  • the invention relates to a device for admixing a gas or. vaporous substance, in particular a fragrance, to a gas stream in a mixing chamber to which the gaseous or vaporous substance is fed via a line by means of a carrier gas.
  • a device for mixing fragrances is known from US Pat. No. 4,520,651.
  • the vapors of the fragrances to be mixed are mixed with odorless carrier gas and these individual gas mixtures are combined in a mixing chamber in order to produce a fragrance composition.
  • the lines which lead the odorless gas to the storage containers containing the odoriferous substances have controllable valves with which the odorless gas can be switched on and off and the gas quantities can be regulated individually.
  • This known device has the disadvantage that when the valves are opened, i.e. when adding an individual fragrance component or increasing the concentration in the lines, the surfaces must first be saturated. The concentration of the fragrance in the mixing chamber increases slowly until an equilibrium is reached. Conversely, when switching off, so-called memory effects occur because fragrances that desorb from the surfaces can get into the mixing chamber by diffusion. The waiting time until a state of equilibrium is reached and an olfactory assessment of the composition can be made is relatively long.
  • Another disadvantage of the known mixing device is that it does not make it possible to measure odor threshold values at which precisely defined amounts of a gas saturated with fragrance are added to an odorless diluent gas.
  • the invention has for its object to provide a device with which both fragrance mixtures can be produced or varied quickly and reproducibly, and threshold value determinations can be carried out simply and precisely.
  • this object is achieved by a device of the type mentioned at the outset, which is characterized in that the line contains a capillary which is arranged in a feed device with two defined positions such that it is in one position through an opening provided with closure means in the Mixing chamber extends in the interior and opens in the second position outside the mixing chamber in a suction chamber surrounding the mixing chamber.
  • the line including its moving parts consists of a metal capillary and is continuously flowed through by the carrier gas saturated with the gaseous substance.
  • the feed device can preferably be a pneumatically operated piston in a cylinder.
  • the closing means of the opening of the mixing chamber expediently consist of an elastic membrane. The air or the resulting mixture of air, carrier gas and the gaseous substance is expediently sucked out of the suction chamber surrounding the mixing chamber.
  • a particular embodiment is used to produce a mixture of several fragrances in a gas stream and for this purpose has a large number of lines with capillaries and a corresponding number of feed devices and openings of the mixing chamber provided with closure means.
  • the single figure of the drawing shows partly in perspective and partly in section a device for admixing several fragrances to a gas stream, i.e. in other words, for the production of fragrance mixtures in a gas stream.
  • This device can also be used for the so-called threshold value determination, in that only a single fragrance is added and its concentration is varied.
  • a device which is used exclusively for determining the threshold value is constructed on the same principle as the embodiment described below.
  • the mixtures are produced in a mixing chamber 1, which essentially consists of an elongated tube 2 open on both sides, at the upper end of which the opening 3 is widened to a triangular shape adapted to the human nose.
  • a continuous air flow 5 is fed through the lower opening 4. This suitably corresponds to the usual amount for normal breathing of approx. 8 to 10 liters per minute.
  • the mixing chamber is preferably made of glass. In its lower part it has a number of openings 6 which are all arranged at the same height and evenly distributed over the circumference. Alternatively, the openings could also be arranged at different heights, in particular e.g. on two levels if there are more openings than there is space on one level.
  • the openings are covered by an elastic membrane 7.
  • the membrane is made of rubber, for example, and has the property of closing again after perforation by a needle and withdrawal of the needle.
  • the openings 6 can also be covered with other mechanical devices instead of membranes, e.g. Flaps, etc., or omitted entirely if the diameter of the openings is kept small enough.
  • a feed system 8 for the fragrance components which are mixed in the mixing chamber.
  • the feed system 8 essentially consists of a feed device 9 and a line system 10 for supplying the fragrance components from storage containers 11 to the mixing chamber 1.
  • the feed device 9 consists of an annular housing 12, in which holes 13 are arranged uniformly distributed around the circumference in the same angular positions as the openings 6, in which the push rods 14 are axially displaceably guided.
  • the bores 13 are expanded into chambers 15 with a larger cross section, which have the function of cylinders.
  • the push rods 14 are surrounded approximately in the middle by an annular, cuff-like piston 16, which divides the chambers 15 into two airtight parts.
  • a supply line 17 leads to each of the two parts, via which compressed air is alternately supplied in order to pneumatically move the pistons 16 and thus the push rods 14 in one direction or the other within the cylinder 15.
  • the compressed air supply is symbolized by the arrows 18.
  • the push rods 14 are provided with central axial bores in which capillaries 19 are arranged. On the side of the push rods facing the mixing chamber, the capillaries protrude beyond the push rods so that their end 20 projects into the mixing chamber when, as shown on the left-hand side of the figure, the push rod is pneumatically pushed inwards, while the end 20 as Shown on the right side, remains outside the mixing chamber when the push rod is pneumatically moved outwards.
  • the capillaries 19 are connected by lines 21 to the already mentioned storage vessels 11 for the fragrance.
  • the capillaries 19 and the associated moving connecting lines 21 each consist of a single steel capillary. If necessary, another metal, for example platinum, can also be provided.
  • An inert carrier gas for example nitrogen, which is symbolized by the arrow 23, is fed to the storage containers 11 via a feed line 22.
  • Valves 24 are arranged in the lines 22, with which the carrier gas flow can be metered.
  • a suction chamber 25 is provided between the mixing chamber 1 and the feed device 9, in which the capillary orifices are located when they are pushed outwards with the push rod 14.
  • the air or an air / fragrance mixture that is created there is continuously extracted from this suction space 25, as is symbolized by the arrow 26.
  • the device has twelve openings 6 and, accordingly, the feed device also has twelve pneumatic cylinders 15 with push rods 14 and the associated capillaries 19, each of which is connected to corresponding storage vessels 11 .
  • the capillary mouths are pushed into the mixing chamber with the feed device.
  • the continuous gas stream consisting of carrier gas and fragrance enters the main air stream 5 which flows through the mixing chamber.
  • All other capillaries whose associated components should not get into the mixture, but which will still be used in the course of the test series, are also continuously flowed through by the carrier gas with fragrance, which, however, gets into the suction chamber and is sucked off from there. If a component is now to get into the mixture, the corresponding capillary is inserted into the mixing chamber by means of the feed device, whereby the component is immediately present in the desired constant concentration.
  • the concentration of the individual components is determined via the flow of the carrier gas 23, i.e. controlled by the valves 24.
  • the valves 24 allow the nitrogen flow to be controlled between 0 and 1000 ml per minute. If necessary, larger flows of several liters per minute can be provided by a suitable choice of capillaries and valves.
  • the device has the advantage that the problem of adsorption or desorption on the inner surfaces of the lines is eliminated as a result of the continuous flow through the capillary lines with the mixture of carrier gas and fragrance.
  • the fragrance concentrations set in the channels are always in equilibrium and therefore always have constant values sen.
  • the method of inserting the capillaries into the mixing chamber or pulling them out of the mixing chamber achieves the intended mixing ratio practically instantaneously, that is to say essentially faster than with previously known methods.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Cosmetics (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Sampling And Sample Adjustment (AREA)
EP91112386A 1990-07-31 1991-07-24 Dispositif pour mélanger des gaz ou des vapeurs Expired - Lifetime EP0469442B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH251790 1990-07-31
CH2517/90 1990-07-31

Publications (2)

Publication Number Publication Date
EP0469442A1 true EP0469442A1 (fr) 1992-02-05
EP0469442B1 EP0469442B1 (fr) 1994-03-16

Family

ID=4235571

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91112386A Expired - Lifetime EP0469442B1 (fr) 1990-07-31 1991-07-24 Dispositif pour mélanger des gaz ou des vapeurs

Country Status (13)

Country Link
US (1) US5198155A (fr)
EP (1) EP0469442B1 (fr)
JP (1) JP2525524B2 (fr)
AR (1) AR243403A1 (fr)
AU (1) AU645331B2 (fr)
BR (1) BR9103234A (fr)
CA (1) CA2046114A1 (fr)
DE (1) DE59101197D1 (fr)
DK (1) DK0469442T3 (fr)
ES (1) ES2050490T3 (fr)
HK (1) HK150895A (fr)
MX (1) MX173643B (fr)
ZA (1) ZA915162B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2705037A1 (fr) * 1993-05-11 1994-11-18 Viguerie Christian Marcel Dispositif de mitigeage sélectif et système de diffusion équipé de ce dispositif.

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9709840D0 (en) * 1997-05-15 1997-07-09 Sinclair Int Ltd Assessment of the condition of fruit and vegetables
BR9801758A (pt) * 1997-06-05 2000-02-22 Givaudan Roure Int OlfatÈmetro
EP0883049A1 (fr) * 1997-06-05 1998-12-09 Givaudan-Roure (International) S.A. Olfactomètre
FR2865136B1 (fr) * 2004-01-15 2007-11-23 Frederic Malle Consultants Dispositif de projection d'un flux d'air parfume et installation comportant plusieurs dispositifs

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941975A1 (de) * 1979-10-17 1985-12-19 Desma-Werke Gmbh, 2807 Achim Mischkopf zur verarbeitung von polyurethan oder dergleichen

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2950618A (en) * 1954-04-22 1960-08-30 John B Lewis Device for blending gaseous materials
US3902851A (en) * 1974-01-09 1975-09-02 Fats & Proteins Res Found Method of detecting odors and apparatus therefor
DE2538437C3 (de) * 1975-08-29 1980-05-08 Elastogran Maschinenbau Gmbh & Co, 8021 Strasslach Mischvorrichtung für Mehrkomponentenkunststoffe mit Poren- oder Zellenstruktur, insbesondere Polyurethan
US4263166A (en) * 1978-04-28 1981-04-21 Entek Corporation Spray foam insulation gun
US4554820A (en) * 1982-04-19 1985-11-26 Ira Litman Method and apparatus for obtaining the combined aroma of several substances
US4520651A (en) * 1982-04-19 1985-06-04 Ira Litman Method and apparatus for obtaining the combined aroma of several substances
US4470938A (en) * 1982-08-27 1984-09-11 Mobil Oil Corporation Method and apparatus for extrusion of thermoplastic foam
US4563893A (en) * 1983-04-22 1986-01-14 Necmi Tanyolac Methods and apparatus for detection and identification of volatile materials and odors
CA1318285C (fr) * 1987-06-10 1993-05-25 Hiroji Machida Methode de diffusion d'aromes, appareil et installation connexe

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941975A1 (de) * 1979-10-17 1985-12-19 Desma-Werke Gmbh, 2807 Achim Mischkopf zur verarbeitung von polyurethan oder dergleichen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 12, Nr. 40 (C-474)[2887], 5. Februar 1988; & JP-A-62 191 036 (FURUKAWA) 21-08-1987 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2705037A1 (fr) * 1993-05-11 1994-11-18 Viguerie Christian Marcel Dispositif de mitigeage sélectif et système de diffusion équipé de ce dispositif.

Also Published As

Publication number Publication date
AU8125991A (en) 1992-02-06
DE59101197D1 (de) 1994-04-21
US5198155A (en) 1993-03-30
JPH04227038A (ja) 1992-08-17
AU645331B2 (en) 1994-01-13
DK0469442T3 (da) 1994-05-02
CA2046114A1 (fr) 1992-02-01
ZA915162B (en) 1992-05-27
MX173643B (es) 1994-03-18
ES2050490T3 (es) 1994-05-16
AR243403A1 (es) 1993-08-31
BR9103234A (pt) 1992-02-18
HK150895A (en) 1995-09-29
JP2525524B2 (ja) 1996-08-21
EP0469442B1 (fr) 1994-03-16

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