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WO2019111074A1 - Machine à café avec dispositif de moussage - Google Patents

Machine à café avec dispositif de moussage Download PDF

Info

Publication number
WO2019111074A1
WO2019111074A1 PCT/IB2018/058449 IB2018058449W WO2019111074A1 WO 2019111074 A1 WO2019111074 A1 WO 2019111074A1 IB 2018058449 W IB2018058449 W IB 2018058449W WO 2019111074 A1 WO2019111074 A1 WO 2019111074A1
Authority
WO
WIPO (PCT)
Prior art keywords
coffee maker
passage section
maker according
main duct
frothing device
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.)
Ceased
Application number
PCT/IB2018/058449
Other languages
English (en)
Inventor
Luca ONGARETTI
Carlo USANZA
Moreno Balzani
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.)
Bialetti Industrie SpA
Original Assignee
Bialetti Industrie SpA
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 Bialetti Industrie SpA filed Critical Bialetti Industrie SpA
Publication of WO2019111074A1 publication Critical patent/WO2019111074A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • A47J31/30—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 steam pressure
    • A47J31/303—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 steam pressure classical type of espresso apparatus, e.g. to put on a stove, i.e. in which the water is heated in a lower, sealed boiling vessel, raised by the steam pressure through a rising pipe and an extraction chamber and subsequently is collected in a beverage container on top of the water boiling vessel
    • 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
    • A47J31/4496—Means to produce beverage with a layer on top, e.g. of cream, foam or froth

Definitions

  • the object of the present invention is a coffee maker capable of producing a beverage having a particularly dense and compact foam.
  • the purpose of the present invention is to create a coffee maker provided with a device that ensures the production of a beverage with a dense and compact foam, which is both economical and easy to assemble.
  • figure 1 shows a coffee maker according to an embodiment of the present invention
  • - figure 2 shows a magnification of an end area of a pipe of a coffee maker in figure 1, provided with a frothing device with pressure valve in the open configuration
  • - figure 3 shows a magnification of the end area of the pipe of the coffee maker in figure 1, with the frothing device in the closed configuration
  • FIG. 4 shows a ring of the frothing device
  • FIG. 5 shows the frothing device in figure 2, in separate parts
  • FIG. 6 shows a nozzle of the frothing device
  • figure 7 shows the frothing device in figure 2 with pressure valve in the open configuration with indication of the reference sections and dimensions.
  • a coffee maker 1 comprises a boiler 2 consisting of a container, preferably made in one piece, generally made of steel or aluminum.
  • the boiler 2 comprises a bottom 4 which is intended to be placed on a cooktop, e.g. a gas burner, an electric burner, an induction burner and the like.
  • a cooktop e.g. a gas burner, an electric burner, an induction burner and the like.
  • the boiler bottom 4 typically if it is made of aluminum, comprises a plurality of inserts made of ferromagnetic material, such as steel, to allow the use of the coffee maker on an induction burner.
  • the boiler 2 further comprises an annular boiler wall 6, protruding from the bottom 4, ending at the top with a boiler mouth 8, typically provided with a thread 10.
  • the coffee maker 1 comprises a safety valve 12, preferably inserted through the thickness of the boiler wall 6.
  • the safety valve is manufactured according to the document EP-A1-1797360 in the name of the Applicant, the contents of which are expressly incorporated herein.
  • the boiler 2 thus has an inner boiler chamber 14 delimited by the boiler bottom 4 and the boiler wall 6.
  • the coffee maker 1 further comprises a dosing funnel 20, housed in the boiler chamber 14, typically supported by the edge of the boiler mouth 8.
  • the dosing funnel 20 comprises a dosing duct 22 for the rising of the water from the boiler chamber 14, which flows into a dosing chamber 24, intended to contain the ground coffee.
  • the dosing duct 22 and the dosing compartment 24 are preferably separated by a dosing filter 26, generally consisting of a perforated foil, provided to prevent the ground coffee from penetrating the dosing duct 22.
  • the coffee maker 1 further comprises a container 30 for the collection of the percolated beverage, to be coupled with the boiler 2.
  • the container 30 comprises a connection region 32 to mechanically engage with the boiler 2.
  • said connection region 32 consists of an annular connection wall 34, e.g. internally threaded, for screwing onto the boiler mouth 8.
  • the container 30 further comprises a container bottom 36, from which said attachment region 32 preferably protrudes downwards, and an annular container wall 38, which projects upwards from the container bottom 36, thus delimiting a container chamber 40 for the collection of the percolated beverage.
  • the container wall 38 has a portion shaped to form a spout 39 to pour the beverage contained in the container chamber 40.
  • the container 30 further comprises a pipe 42 protruding vertically from the container bottom 36, open below, through a pipe inlet 44 that opens through the container bottom 36, and above, through a pipe mouth 46, for the outflow of the percolated beverage.
  • the pipe inlet 44 is in communication with the pipe mouth 46 through an inner pipe duct 45.
  • the container 30 is made as a single piece body, usually of steel or aluminum.
  • the container is made of ceramic or glass and has inserts for engagement with the boiler 2.
  • the coffee maker 1 comprises a beverage filter 50 placed between the dosing compartment 24 and the pipe inlet 44, for example consisting of a perforated foil, to filter the percolated beverage before it passes through the pipe 42.
  • a beverage filter 50 placed between the dosing compartment 24 and the pipe inlet 44, for example consisting of a perforated foil, to filter the percolated beverage before it passes through the pipe 42.
  • said beverage filter 50 is held in place by a gasket 52 made of rubber, e.g. NBR rubber, EPDM or silicone .
  • the coffee maker 1 comprises a handle 60, applied to the container 30, and a cover 70 hinged to the container 30 and rotatable for inspecting the container chamber 40; preferably, the cover 70, in the closed configuration, does not cover the spout 39.
  • the coffee maker 1 comprises a frothing device 79, applied to the top of the pipe 42.
  • the frothing device 79 comprises a main body 80 arranged along the pipe duct 45, preferably upstream of the pipe mouth 46, to intercept the beverage in transit.
  • the main body 80 is fitted with at least one main duct 82 passing through said main body 80, having a very small passage section compared to the passage section of the pipe duct 45 upstream of the main body 80.
  • said main duct 82 achieves a strong restriction of the passage section.
  • the main pipe 82 has a passage section with a characteristic dimension D, e.g. defined by a diameter, if the section is circular, ranging from 0.8 to 1.2 mm.
  • This main duct 82 also has a characteristic length C ranging from 6 to 10 millimeters.
  • a characteristic ratio D/C is defined, preferably between 0.05 - 0.5, preferably between 0.08 - 0.2, preferably equal to 0.125.
  • the material constituting the side wall 82a that delimits peripherally said main duct 82 is selected to increase the adhesion of the beverage inside the duct in the characteristic temperature conditions.
  • the contact surface between the beverage and the side wall of the main duct is treated to increase adhesion.
  • the entire main body 80 is made of silicone .
  • the main body provides for a plurality of main ducts, for example, parallel to each other, which on the whole satisfy the dimensional requirements mentioned above.
  • the frothing device 79 Downstream of the main duct 82, the frothing device 79 has a primary expansion chamber 90 with a passage section much larger than the passage section of the main duct 82, in order to obtain a sudden decrease in the speed of the beverage arriving from the main duct 82.
  • the main duct 82 opens into the primary chamber 90 without connecting sections, so that the change in passage section is sudden.
  • the passage section of said primary chamber 90 has a characteristic dimension H, for example a diameter in the case of a circular cross-section ranging from 4 - 8 millimeters.
  • a characteristic ratio D/H is defined between the characteristic dimension D of the passage section of the main duct 82 and the characteristic dimension H of the passage section of the primary chamber 90, ranging from 0.1 - 0.3, preferably from 0.15 - 0.18, preferably equal to 0.17.
  • the frothing device 79 comprises a nozzle 92, to which the main body 80 is applied, in which said primary chamber 90 is defined.
  • the nozzle 92 comprises a wider nozzle head 92a and a narrower nozzle shank 92b.
  • the nozzle 92 is applied to the pipe mouth 46, for example by means of the nozzle shank 92b, preferably with a sealing ring 94 in between, while the main body 80, supported by the nozzle 92, is inserted into the pipe duct 45.
  • the frothing device 79 comprises a secondary duct 96 downstream of the primary chamber 90, having a passage section much smaller than the passage section of the primary chamber 90.
  • the secondary duct 96 has a passage section with a characteristic dimension A, e.g. defined by a diameter, if the cross-section is circular, ranging from 1.7 - 2.7 mm.
  • a characteristic ratio A/H is defined between the characteristic dimension A of the passage section of the secondary duct 96 and the characteristic dimension H of the passage section of the primary chamber 90, preferably ranging from 0.2 - 0.7, preferably from 0.3 - 0.5, preferably equal to 0.37.
  • said secondary duct 96 is obtained in said nozzle 92, downstream of the primary chamber 90.
  • the frothing device 79 comprises a secondary expansion chamber 100 having a characteristic section much larger than the passage section of the secondary duct 96.
  • the secondary chamber 100 has a characteristic section, e.g. assessed immediately at the outlet of the secondary duct 96, with characteristic dimension L, for example a diameter, in the case of a circular section, greater than 20 millimeters.
  • a characteristic ratio A/L is defined between the characteristic dimension A of the passage section of the secondary duct 96 and the characteristic dimension L of the characteristic section of the secondary chamber 100, preferably less than 0.1, preferably less than 0.09, e.g. 0.08.
  • the frothing device has no secondary duct and the primary chamber opens directly into the secondary chamber.
  • the secondary chamber 100 is suitable to communicate with the container chamber 40, to dispense the beverage therein, according to the configuration assumed by a pressure valve 110 of the frothing device 79, operatively placed between said secondary chamber 100 and the container chamber 40.
  • said pressure valve is manufactured according to the International Application WO-A1-98/ 17160 in the name of the Applicant, the teaching of which is hereby expressly incorporated.
  • said pressure valve 110 is normally closed (closed configuration) and is suitable to pass into an open configuration, wherein it connects the secondary chamber 100 with the container chamber 40, when a predefined pressure value, defined as threshold pressure p*, is exceeded in the secondary duct 96.
  • said pressure valve 110 comprises a shutter 112, which in the closed configuration closes the secondary duct 96, for example, resting on the nozzle 92.
  • the shutter 112 consists of a disc made of polymeric material, suitable for sealing.
  • the pressure valve 110 further comprises a mass 114, which presses on the shutter 112 by gravity.
  • said mass 114 is comprised of a body, shaped like an upside-down glass, inside of which the shutter 112 is housed.
  • the pressure valve 110 comprises a lock ring 116 for holding the shutter 112 inside the mass 114.
  • said lock ring 116 comprises an annular ring wall 118, preferably threaded externally, which extends from an upper edge 118a to a lower edge 118b, thus peripherally delimiting a valve compartment 119, and a ring flange 120, protruding radially outside the lower edge 118b of the ring wall 118.
  • the ring flange 120 protrudes radially from the ring wall 118 also internally .
  • the shutter 112 is housed in the mass 114, and the ring wall 118 of the ring 116 is screwed to said mass 114, so that the upper edge of the shutter 112 is in contact therewith, thus holding it inside the mass 114.
  • the nozzle shank 92b is screwed to the pipe mouth 46, while the nozzle head 92a is accommodated in the valve compartment 119; the ring 116, which carries the mass 114, is movable with respect to the nozzle 92, by virtue of the size of the valve compartment 119, without being able to be removed therefrom, due to the inner abutment created by the ring flange 120.
  • the pressure valve 110 When the pressure of the beverage in the secondary duct 96 is lower than the threshold pressure p*, the pressure valve 110 is in the closed configuration wherein the shutter 112 is positioned on the nozzle 92 and closes said secondary duct 96. In such a configuration, the secondary chamber 100 is practically non-existent.
  • the distance between the outlet opening of the secondary duct 96 and the shutter 112 determines the height of the secondary chamber 100.
  • the boiler chamber 14 is filled with a known volume of water, generally indicated by the height of the safety valve 12, or by the height of a reference (a turning or a notch in relief) present in the boiler 14 or in the container 30.
  • a reference a turning or a notch in relief
  • the boiler 2 is then fitted with the container 30, e.g. by screwing.
  • the pressure valve 110 is initially in the closed configuration.
  • the pressure valve 110 opens and the beverage begins to flow towards the container chamber 40.
  • the beverage passes from the pipe duct 45 to the main duct 82 and from there to the primary chamber 90.
  • the coffee maker according to the present invention meets the needs of the sector, as it allows a beverage with a dense and compact foam to be obtained, while maintaining a high simplicity of construction and assembly.

Landscapes

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

Abstract

La présente invention concerne une machine à café (1) pourvue d'un dispositif de moussage (79) appliqué à l'embouchure de tuyau (46). Le dispositif de moussage (79) comprend un corps principal (80) équipé d'un conduit principal (82) à travers lequel l'écoulement de la boisson percolée est canalisé. Le conduit principal (82) a une paroi latérale (82a) constituée d'un matériau polymère ou doté d'un traitement de surface qui augmente l'adhérence avec la boisson sortante et un rapport caractéristique (D/C) entre la dimension caractéristique (D) de la section de passage et la longueur (C) est compris entre 0,05 et 0,5.
PCT/IB2018/058449 2017-12-04 2018-10-29 Machine à café avec dispositif de moussage Ceased WO2019111074A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT201700139672 2017-12-04
IT102017000139672 2017-12-04

Publications (1)

Publication Number Publication Date
WO2019111074A1 true WO2019111074A1 (fr) 2019-06-13

Family

ID=61656144

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2018/058449 Ceased WO2019111074A1 (fr) 2017-12-04 2018-10-29 Machine à café avec dispositif de moussage

Country Status (1)

Country Link
WO (1) WO2019111074A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115038368A (zh) * 2020-01-16 2022-09-09 比乐蒂工业股份有限公司 带有发泡装置的咖啡机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090013876A1 (en) * 2004-07-20 2009-01-15 Francesco Ranzoni Equipment for the preparation of a hot beverage
WO2016113621A1 (fr) * 2015-01-12 2016-07-21 BOIDO, Davide Mario Machine à expresso pour surface de cuisson
WO2017144996A1 (fr) * 2016-02-26 2017-08-31 Mokha' S.R.L. Valve pour distribution d'infusion avec une mousse pour machine à café de type moka, et machine à café comprenant ladite valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090013876A1 (en) * 2004-07-20 2009-01-15 Francesco Ranzoni Equipment for the preparation of a hot beverage
WO2016113621A1 (fr) * 2015-01-12 2016-07-21 BOIDO, Davide Mario Machine à expresso pour surface de cuisson
WO2017144996A1 (fr) * 2016-02-26 2017-08-31 Mokha' S.R.L. Valve pour distribution d'infusion avec une mousse pour machine à café de type moka, et machine à café comprenant ladite valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115038368A (zh) * 2020-01-16 2022-09-09 比乐蒂工业股份有限公司 带有发泡装置的咖啡机
JP2023517809A (ja) * 2020-01-16 2023-04-27 ビアレッティ インドゥストリエ ソチエタ ペル アツィオニ 発泡装置を備えるコーヒーメーカー
JP7624006B2 (ja) 2020-01-16 2025-01-29 ビアレッティ インドゥストリエ ソチエタ ペル アツィオニ 発泡装置を備えるコーヒーメーカー

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