WO2007095770A1 - Dispositif destiné à chauffer et à faire mousser des liquides - Google Patents

Dispositif destiné à chauffer et à faire mousser des liquides Download PDF

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Publication number
WO2007095770A1
WO2007095770A1 PCT/CH2007/000080 CH2007000080W WO2007095770A1 WO 2007095770 A1 WO2007095770 A1 WO 2007095770A1 CH 2007000080 W CH2007000080 W CH 2007000080W WO 2007095770 A1 WO2007095770 A1 WO 2007095770A1
Authority
WO
WIPO (PCT)
Prior art keywords
steam
constriction
liquid
air
lance
Prior art date
Application number
PCT/CH2007/000080
Other languages
German (de)
English (en)
Inventor
Markus Landolt
Original Assignee
Egro Coffee Systems Ag
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 Egro Coffee Systems Ag filed Critical Egro Coffee Systems Ag
Publication of WO2007095770A1 publication Critical patent/WO2007095770A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/4489—Steam nozzles, e.g. for introducing into a milk container to heat and foam milk

Definitions

  • the invention relates to a foaming device for foaming and heating liquid food and drinks according to the preamble of claim 1.
  • the compressed air is mixed in the pressure tube with the steam and this vapor-air mixture passes through the open end of the pressure line in the milk, which is heated by the steam and mixed with the air with foaming.
  • the steam and compressed air supply is controlled by valves, which are controlled by a control unit. This device is relatively expensive, since the air supply must be made under pressure and this pressure is provided with an additional device.
  • a frothing device for preparing cappuccino is known from DE 36 44 519 A1.
  • a steam pipe in this case has a steam nozzle, which is connected upstream of a mixing chamber into which an air duct opens.
  • the steam pipe and the air duct are arranged side by side. From the mixing chamber then exits a mixture of steam and air in the fluid to be foamed.
  • This foaming device has the disadvantage that it can not be dismantled for cleaning purposes. This is disadvantageous because the steam pipe and the air duct is immersed in milk or latte coffee without the steam supply is opened. In this case, the liquid can penetrate into the fine channels of the steam or air supply and pollute them, which can clog them or cause unhygienic conditions.
  • the present invention has for its object to overcome these disadvantages of known devices for heating and frothing of beverages and in particular of milk in a vessel. This object is achieved by the inventive device with the characterizing features of claim 1.
  • the invention is based on the finding that when flowing through steam through a constriction in the steam pipe at the constriction, a negative pressure arises. Due to the negative pressure, air is sucked in from the environment through an opening arranged in this area and mixed with the steam in the subsequent steam pipe.
  • This known as venturi or Venturi nozzle arrangement is further developed into a steam lance, whose lower open end is formed to a nozzle opening.
  • the area of the steam lance between the Venturi nozzle and the lower opening forms the mixing chamber, in which the steam mixes with the sucked air as it flows through.
  • the Venturi nozzle with the air intake opening is arranged in the upper region of the steam lance in such a way that in use it lies outside the liquid to be heated and foamed.
  • FIG. 1 shows a section through an exemplary embodiment of the inventive steam lance, shown schematically;
  • Fig. 2 shows another example embodiment of the air supply in the steam pipe, shown schematically.
  • the same reference numerals have been used for the same elements and first explanations relate to all figures, unless expressly stated otherwise.
  • This steam lance 1 consists of a made of metal or plastic pipe 4, which is connected to a steam treatment device D, not shown here, such as a boiler and / or a water heater, connected.
  • the connection 11 of the steam lance 1 to the pipe or hose of the steam treatment device D can be done by plugging by means of a rubber grommet or by screwing the steam pipe, depending on the design and application. It is also conceivable that the steam lance 1 is firmly connected to the steam line of the steam treatment.
  • the tube 4 Immediately after the connection region 11, the tube 4 has a conical constriction 5 formed in the interior of a Venturi nozzle.
  • the length of the steam pipe 4 in the region of the mixing chamber 6 is selected such that the region of the constriction 5 and the air duct 9 is located above the liquid level 8 even when the steam lance 1 is completely submerged in the liquid 3.
  • the described steam lance 1 is made in one piece, but may also be composed of individual pipe sections. These pipe sections may for example consist of a connection section 11, a venturi nozzle section, a further pipe section which forms the mixing chamber 6 and an outlet nozzle 7. In a further conceivable embodiment, a Venturi nozzle is inserted into a steam pipe and fixed in the steam pipe.
  • the steam pipe has holes or slots at appropriate locations through which the air can flow into the venturi.
  • FIG. 2 shows a section of the steam pipe 4 of the steam lance 1 with a further embodiment for feeding the air L into the mixing chamber 6.
  • the steam pipe 4 has two approximately conical or funnel-shaped, oppositely directed constriction 5, 15 of the steam pipe 4, such that a first constriction 5 opens with a smaller inner diameter of the outlet opening in a second, opposing constriction 15 with larger inner diameter. Due to the different inner diameters of the two constrictions 5, 15 opening into one another, an air gap 16 results.
  • the steam pipe 4 has one or more holes or slots 14 in the area between the first and the second constrictions.
  • the suction of air is carried out according to the invention in the upper region of the steam lance with a pipe arranged in this region and acting on the Venturi principle pipe constriction or nozzle.
  • This area is always above the liquid level when heating and foaming liquids with this steam lance so that the air intake area with the Venturi nozzle never comes into contact with the liquid to be foamed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Apparatus For Making Beverages (AREA)

Abstract

L'invention concerne un dispositif servant à chauffer et à faire mousser des aliments liquides et des boissons, en particulier du lait, au moyen d'un mélange vapeur-air (DL) produit à l'extérieur du liquide (3). Le mélange vapeur-air est introduit au moyen d'une lance à vapeur (1) dans le liquide (3) contenu dans un récipient (2). La lance à vapeur (1) est constituée d'un tuyau à vapeur (4) pouvant être connecté à une unité de préparation de vapeur, qui comporte, immédiatement après la zone de raccord (11), un rétrécissement (5) interne, réalisé sous la forme d'une buse Venturi, pourvu d'au moins une ouverture (9,14) servant à l'aspiration d'air. Le rétrécissement (5) pourvu de l'ouverture (9,14) d'aspiration d'air est séparé de l'ouverture de sortie (7) de la lance à vapeur (1) par une distance telle que ce rétrécissement (5) se trouve au-dessus du niveau (8) du liquide (3) contenu dans le récipient (2) lorsque la lance à vapeur (1) est complètement introduite dans le liquide (3) à chauffer ou à faire mousser.
PCT/CH2007/000080 2006-02-24 2007-02-14 Dispositif destiné à chauffer et à faire mousser des liquides WO2007095770A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH293/06 2006-02-24
CH2932006A CH698188B1 (de) 2006-02-24 2006-02-24 Vorrichtung zum Wärmen und Aufschäumen von Flüssigkeiten.

Publications (1)

Publication Number Publication Date
WO2007095770A1 true WO2007095770A1 (fr) 2007-08-30

Family

ID=38055147

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2007/000080 WO2007095770A1 (fr) 2006-02-24 2007-02-14 Dispositif destiné à chauffer et à faire mousser des liquides

Country Status (2)

Country Link
CH (1) CH698188B1 (fr)
WO (1) WO2007095770A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012100697A1 (fr) * 2011-01-30 2012-08-02 漳州灿坤实业有限公司 Dispositif permettant de faire mousser le café
US8733234B2 (en) 2008-09-01 2014-05-27 Nestec S.A. Appliance for conditioning a milk-based liquid
US8875618B2 (en) 2008-09-01 2014-11-04 Nestec S.A. Appliance for fine steam-frothing a milk-based liquid

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024115267A1 (fr) * 2022-11-28 2024-06-06 De' Longhi Appliances S.R.L. Adaptateur pouvant être raccordé à une borne de distribution de vapeur externe pour la préparation d'une boisson lactée chaude

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8907183U1 (de) * 1989-06-12 1989-07-27 Wu, Tsann-Kuen, Tainan Hsien Blasenbildender Behälter vom Venturirohr-Typ
DE3942713A1 (de) * 1989-12-22 1991-06-27 Bosch Siemens Hausgeraete Cappuccinoduese
EP0607759A1 (fr) * 1993-01-19 1994-07-27 C.G.F. S.r.l. Dispositif pour faire mousser de la vapeur, en particulier pour préparer des boissons chaudes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8907183U1 (de) * 1989-06-12 1989-07-27 Wu, Tsann-Kuen, Tainan Hsien Blasenbildender Behälter vom Venturirohr-Typ
DE3942713A1 (de) * 1989-12-22 1991-06-27 Bosch Siemens Hausgeraete Cappuccinoduese
EP0607759A1 (fr) * 1993-01-19 1994-07-27 C.G.F. S.r.l. Dispositif pour faire mousser de la vapeur, en particulier pour préparer des boissons chaudes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8733234B2 (en) 2008-09-01 2014-05-27 Nestec S.A. Appliance for conditioning a milk-based liquid
US8875618B2 (en) 2008-09-01 2014-11-04 Nestec S.A. Appliance for fine steam-frothing a milk-based liquid
WO2012100697A1 (fr) * 2011-01-30 2012-08-02 漳州灿坤实业有限公司 Dispositif permettant de faire mousser le café

Also Published As

Publication number Publication date
CH698188B1 (de) 2009-06-15

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