EP2244617A1 - Brühgruppe für eine kaffeemaschine - Google Patents
Brühgruppe für eine kaffeemaschineInfo
- Publication number
- EP2244617A1 EP2244617A1 EP09710750A EP09710750A EP2244617A1 EP 2244617 A1 EP2244617 A1 EP 2244617A1 EP 09710750 A EP09710750 A EP 09710750A EP 09710750 A EP09710750 A EP 09710750A EP 2244617 A1 EP2244617 A1 EP 2244617A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- brewing
- piston
- sleeve
- hot water
- plunger
- 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- Withdrawn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
-
- 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
- A47J31/24—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure
- A47J31/34—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure
- A47J31/36—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure with mechanical pressure-producing means
- A47J31/3604—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure with mechanical pressure-producing means with a mechanism arranged to move the brewing chamber between loading, infusing and ejecting stations
- A47J31/3609—Loose coffee being employed
Definitions
- the present invention relates to a brewing group for a coffee machine for brewing a coffee powder portion, in particular for so-called “espresso machines", in which the metering and dispensing of the coffee powder before the preparation of the beverage and the removal of the leached coffee powder after the beverage preparation more or less automatically, and which make it possible to prepare any number of portions of fresh coffee one after the other.
- a device for preparing coffee with a housing, a fresh water connection or a fresh water tank, a heating element for heating the fresh water, an arrangement for conveying the heated fresh water under pressure to a brewing chamber, with a closure member and with a beverage powder inlet and is provided with a beverage outlet, and an arrangement for ejecting or removing the leached beverage powder from or from the brewing chamber, and with drive and control means for said arrangements.
- the brewing chamber comprises a cylindrical sleeve with a displaceable piston arranged therein and a closure member with which the sleeve can be closed. As a result, a chamber space is formed, which serves to receive the beverage powder.
- the beverage powder therein is brewed and the finished beverage exits through an outlet.
- a beverage powder inlet serves to charge the chamber space and the emptying of the brewing chamber after the beverage has been prepared is effected by a relative movement between the sleeve and the piston, which causes the powder cake to be expelled.
- the brewing chamber is pivoted to the starting position, wherein the powder cake is removed by a scraper and falls into a collecting container. Subsequently, the chamber space can be filled after retraction of the piston with fresh powder and the machine is ready for the preparation of the next drink.
- the sleeve with the piston and the closure member forms the brewing chamber with a predetermined volume.
- the brewing chamber is filled with more or less coffee and on the other hand, the amount of water with which the coffee powder is brewed in the brewing chamber, varies.
- the packing density of the coffee powder is of importance for optimum quality of a certain beverage, ie the pressure with which the coffee powder is compressed before or during the brewing process should always be the same. This is not achievable with a brewing chamber with a given fixed volume, which is filled with different amounts of coffee powder.
- This pressing pressure can basically be controlled electrically, hydraulically or pneumatically.
- the subject invention is limited to a hydraulic pressing device.
- Figure 1 is a schematic representation of the brewing chamber of a brewing group in cross section
- Figure 2 is a schematic representation of a brewing group in a sectional view with retracted brewing chamber and retracted piston
- Figure 3 is a schematic representation of a brewing group in a sectional view with raised brewing chamber and raised piston;
- Figure 4 is a schematic representation of a brewing group in a sectional view with retracted brewing chamber and raised piston.
- the brewing group 1 for a coffee machine for brewing a coffee powder portion includes a not shown in the drawing Brüh disciplinegetude, an open top and bottom closed with a bottom 7 sleeve 4, in which the coffee powder portion is filled, an upper piston 3 and a brewing piston 6 for compressing the Coffee powder portion 10 in a brewing chamber 5.
- the upper piston 3 is fixedly connected to the Brüh pulpgetude, the sleeve 4 and the brewing piston 6 are arranged in the Brüh disabilitygephaseuse 2 movable and pivotable, the brewing piston 6 is additionally mechanically and hydraulically displaceable relative to the sleeve 4.
- the hot water supply opens 8.
- the brewing piston 3 is provided with a valve 12 passage for the hot water.
- the passage 11 connects the lower chamber space between the sleeve bottom 7 and the brewing piston underside 14 with the brewing chamber 5.
- the brewing chamber is in turn delimited by the sleeve 4, the brewing piston 6 and the upper piston 3.
- the upper piston 3 still has a beverage outlet 15 with the outlet valve 16.
- a coffee powder portion is first filled into the sleeve 4 at a filling point. Subsequently, the sleeve 4 pivots from a filling point to a brewing point and is raised, which is indicated in the figure 1 with the double arrow 24, so that the fixed in the brewing housing upper piston 3 engages the sleeve 4 and the sleeve 4 closes sealing above.
- the brewing piston 6 is also moved mechanically upwards.
- Figure 1 gives the state of the brewing chamber 5 at this time the preparation of the coffee beverage again.
- the coffee powder portion 10 is compressed in the brewing chamber 4 and there is the supply of pressurized hot water through the water inlet 8.
- the valve 12 is still closed, so that in the lower chamber chamber 13, an overpressure builds up by this pressure of the brewing piston 6 hydraulically Pressed towards brewing chamber 5. It comes to a squeezing of the coffee powder. As soon as a certain overpressure predetermined by the valve 12 presses on the brewing piston underside 14, the valve 12 opens and the hot water passes into the brewing chamber 5, where it is forced through the pressed coffee powder portion 10 and drains off via the beverage outlet 15 and the outlet valve 16 , By the hydraulic compression of the coffee powder portion 10 ensures that even with different amounts of coffee powder in the brewing chamber 5, the coffee powder is always brewed at the same pressure.
- the emptying of the brewing chamber 5 after the preparation of the beverage is carried out by lowering the sleeve 4 and a relative movement between the sleeve 4 and the brewing piston 6, which causes a discharge of the powder cake 10. Thereafter, the sleeve 4 is pivoted to the starting position, wherein the powder cake 10 is removed by stripping and falls into a collecting container. Subsequently, the chamber space can be filled after retraction of the brewing piston 6 with fresh powder and the machine is ready for the preparation of the next beverage.
- FIG. 2 shows an embodiment of the brewing group 1 according to the invention in a sectional view with the sleeve 4 retracted and the brewing piston 6 withdrawn.
- the upper piston 3 with the beverage outlet 15 and the beverage outlet valve 16 firmly connected to the housing 2 of the brewing group 1 The brewing piston 6 is in the lowest possible position and the sleeve 4 is ready for filling with coffee powder.
- the sleeve 4 pivots back to the previous starting position and moves up until the upper piston 3 engages in the sleeve 4 and closes it with the upper piston seal 19 pressure-tight.
- FIG. 3 shows a schematic representation of the brewing group 1 in a sectional view with the sleeve 4 raised and the brewing piston 6 raised.
- the valve 12 is still closed, ie the pressure in the lower chamber space 13 and thus the pressure in the brewing chamber 5 are not yet has reached the desired value.
- the valve 12 opens and the hot water flows into the brewing chamber 5, where during the brewing phase also a hydrostatic pressure is built up to the predetermined pressure by the outlet valve 16 is reached and the drink over the beverage outlet 15 drains off.
- FIG. 4 shows, in a schematic illustration, the brewing group 1 in a sectional view with the sleeve 4 retracted and the brewing piston 6 raised.
- the brewing group 1 is after the brewing process.
- the sleeve 4 is lowered and the brewing piston 6 remains in the upper position.
- the coffee-powder cake 10 is pressed out of the sleeve 4 and rests on the brewing piston surface 21.
- the sleeve 4 is pivoted to the starting position - in the drawing to the right -, wherein the powder cake 10 is removed by stripping the edge 22 of the Brühlui housing 2 and falls over the integrally formed on the sleeve 4 slide 23 into a collecting container.
- this has a curvature, the radius of curvature of the pivot radius of the sleeve 4th equivalent.
- the entire brewing piston surface 21 sweeps past the housing edge 22 with a minimum distance and is cleaned of coffee powder residues.
- the sleeve 4 can be filled after retraction of the brewing piston 6 with fresh powder and the machine is ready for the preparation of the next beverage.
- this brewing group By virtue of the hydraulic compression of the coffee powder portion 10, this brewing group according to the invention enables the coffee powder to be brewed always at the same pressing pressure, even with different amounts of coffee powder in the brewing chamber 5. This makes it possible with only one brew group 1 or with only one brewing chamber 5 different coffee drinks, in their preparation each different amounts of coffee powder are used to provide under the same pressure conditions during the brewing process.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Apparatus For Making Beverages (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH2192008 | 2008-02-17 | ||
PCT/CH2009/000051 WO2009100552A1 (de) | 2008-02-17 | 2009-02-09 | Brühgruppe für eine kaffeemaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2244617A1 true EP2244617A1 (de) | 2010-11-03 |
Family
ID=40600240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09710750A Withdrawn EP2244617A1 (de) | 2008-02-17 | 2009-02-09 | Brühgruppe für eine kaffeemaschine |
Country Status (4)
Country | Link |
---|---|
US (1) | US8770092B2 (de) |
EP (1) | EP2244617A1 (de) |
CN (1) | CN101951821B (de) |
WO (1) | WO2009100552A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1403464B1 (it) * | 2011-01-17 | 2013-10-17 | San Marco Spa | Macchina per la preparazione di caffe' |
TW201509354A (zh) | 2013-06-03 | 2015-03-16 | Starbucks Corp Dba Starbucks Coffee Co | 沖泡飲料的設備及其使用 |
US11154157B2 (en) | 2017-08-18 | 2021-10-26 | Starbucks Corporation | Extraction cell |
CN108158401A (zh) * | 2018-02-09 | 2018-06-15 | 李毅 | 一种便携式自动咖啡机 |
CN113727632B (zh) * | 2018-12-24 | 2023-05-26 | 卡里马里股份公司 | 用于制备饮料的冲泡装置 |
DE102021123545A1 (de) * | 2021-09-10 | 2023-03-16 | Eugster/Frismag Ag | Brüheinheit mit hydraulischen Tampermitteln ein Verfahren zum Betrieb einer solchen Brüheinheit |
DE102023109443A1 (de) | 2023-04-14 | 2024-10-17 | Eugster/Frismag Ag | Verfahren zum Betrieb einer Getränkezubereitungsvorrichtung mit einer hydraulischen Vorverdichtungseinheit zum Verdichten eines Getränkesubstrats |
WO2024252439A1 (en) * | 2023-06-09 | 2024-12-12 | De' Longhi Appliances S.R.L. | Brewing unit for a machine for preparing coffee and corresponding machine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202004018776U1 (de) * | 2004-12-04 | 2005-02-10 | Eugster/Frismag Ag | Brühkopf einer Espressomaschine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4208854C2 (de) | 1992-03-19 | 1994-06-30 | Cosmec Srl | Verfahren und Vorrichtung zur Zubereitung von Kaffeegetränken |
US5551988A (en) * | 1993-12-15 | 1996-09-03 | Jura Elektroapparate Ag | Method and apparatus for cleaning a brewing device, especially of a coffee machine |
DE202005011204U1 (de) * | 2005-07-16 | 2005-09-22 | Eugster/Frismag Ag | Espressomaschine mit einer Espressobrüheinheit |
WO2007060694A1 (en) * | 2005-11-22 | 2007-05-31 | Saeco Ipr Limited | Device for producing coffee |
-
2009
- 2009-02-09 US US12/867,838 patent/US8770092B2/en not_active Expired - Fee Related
- 2009-02-09 CN CN200980105478.8A patent/CN101951821B/zh not_active Expired - Fee Related
- 2009-02-09 EP EP09710750A patent/EP2244617A1/de not_active Withdrawn
- 2009-02-09 WO PCT/CH2009/000051 patent/WO2009100552A1/de active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202004018776U1 (de) * | 2004-12-04 | 2005-02-10 | Eugster/Frismag Ag | Brühkopf einer Espressomaschine |
Non-Patent Citations (1)
Title |
---|
See also references of WO2009100552A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2009100552A1 (de) | 2009-08-20 |
CN101951821A (zh) | 2011-01-19 |
US8770092B2 (en) | 2014-07-08 |
CN101951821B (zh) | 2014-01-22 |
US20110041697A1 (en) | 2011-02-24 |
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Legal Events
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Extension state: AL BA RS |
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DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: EGRO SUISSE AG |
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Owner name: RANCILIO GROUP S.P.A. |
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18D | Application deemed to be withdrawn |
Effective date: 20150901 |