WO2007066223A2 - Chaudiere de machine a cafe - Google Patents

Chaudiere de machine a cafe Download PDF

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Publication number
WO2007066223A2
WO2007066223A2 PCT/IB2006/003572 IB2006003572W WO2007066223A2 WO 2007066223 A2 WO2007066223 A2 WO 2007066223A2 IB 2006003572 W IB2006003572 W IB 2006003572W WO 2007066223 A2 WO2007066223 A2 WO 2007066223A2
Authority
WO
WIPO (PCT)
Prior art keywords
boiler
conduit
filter
water
chamber
Prior art date
Application number
PCT/IB2006/003572
Other languages
English (en)
Other versions
WO2007066223A3 (fr
Inventor
Roberto Stefanoni
Original Assignee
Roberto Stefanoni
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 Roberto Stefanoni filed Critical Roberto Stefanoni
Publication of WO2007066223A2 publication Critical patent/WO2007066223A2/fr
Publication of WO2007066223A3 publication Critical patent/WO2007066223A3/fr

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
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/54—Water boiling vessels in beverage making machines
    • 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

Definitions

  • the present invention relates to improvements for a boiler of a coffee machine, and more particularly relates to a device able to improve efficiency of boiler of the coffee machine disclosed in EP 1 321 081 B1 , issued on June 29 th , 2005.
  • the coffee machine includes an upper body or boiler, adapted to generate hot water pressurized, and at least a lower element for supporting and hooking a housing of filter-holder container.
  • the upper body and the filter-holder container are separate by clamping means connected to a valve device, clamped and floating together with a gasket, for pressurized water flow through the filter supported by said filter-holder container.
  • Said clamping means during pressure increase inside the upper body, exerts pressure against said filter supported by the filter-holder container, keeping it in place and sealing, and said valve device sends pressurized water to said filter while, during pressure decrease inside the upper body, said device blocks water flow towards said filter and said clamping means releases said filter-holder container, allowing its removal from the supporting element.
  • a resilient filter-holder gasket adapted to be used with the same coffee machine, which comprises a first outer annular part adapted to be hooked to a suitable supporting structure of the coffee machine, and a second inner annular part, properly shaped and sized in order to be inserted into said first part.
  • a resilient filter-holder gasket allows coffee machine to operate with coffee powder, pods or capsules differently shaped and sized.
  • the known coffee machine of prior art hitherto described once preparation of coffee infusion has been done, before removing the filter-holder container, needs to wait for device (pump) of pressurized water supply to stop supplying water to the filter-holder container and consequently for boiler pressure to decrease in order to cause the resilient gasket to return to the release configuration.
  • a water condensate inevitably is formed inside the boiler, which condensate has to be sent back to water storing reservoir through a suitable recirculation conduit, since it cannot be immediately reused for the next coffee.
  • the present invention aims therefore to make the operation of filling the boiler of a coffee machine, provided with resilient gasket system, faster every time preparation of a coffee infusion has been done, thus reducing the waiting time for preparation of the next coffee. This is achieved thanks to a particular device inserted inside the boiler, which allows to maintain at least a certain amount of hot and pressurized water inside the boiler at the end of each coffee preparation, assuring optimal thermal conditions for preparing further coffees.
  • Fig. 1 is a cross sectional view of an embodiment of a coffee machine boiler provided with the device according to the present invention
  • Fig. 2 is a perspective cross sectional partial view of another embodiment of a coffee machine boiler provided with the device according to the present invention
  • Fig. 3 is an exploded view showing single parts of the boiler in fig. 2;
  • Fig. 4 is another cross sectional view on a oblique plane in respect of the sectional plane of fig. 1.
  • a conventional boiler 1 for coffee machine is shown, provided with a pump (not shown) for supplying pressurized water into the boiler 1 throughout a entry conduit 3, a heater element 5, such as for example an electric resistance, to heat water in the boiler 1 , one or more resilient sealing elements or gaskets 7 and 9 between said boiler 1 and a lower filter- holder crate 11 , and a supply valve 13, adjusted by an elastic element or spring 15 able to pass, at certain pressure level, hot water in the boiler 1 along the filter below (not shown) through exit conduit 17.
  • a pump for supplying pressurized water into the boiler 1 throughout a entry conduit 3
  • a heater element 5 such as for example an electric resistance
  • one or more resilient sealing elements or gaskets 7 and 9 between said boiler 1 and a lower filter- holder crate 11
  • a supply valve 13 adjusted by an elastic element or spring 15 able to pass, at certain pressure level, hot water in the boiler 1 along the filter below (not shown) through exit conduit 17.
  • a separating element 19 is placed in boiler 1 forming two sealed separate chambers 21 and 23 (shown in fig. 1) inside the boiler 1, chamber 21 being bounded below by resilient elements 7 and 9.
  • the pressure required in operation of the water supply mechanism for the filter below, as will be described hereinafter, is generated in the lower chamber 21 whilst in the upper chamber 23 water intended for infusion is heated by means of the resistance 5.
  • separating element 19 is formed in one piece with a first conduit 25 provided with suitable gasket ring 33, which allows water flow from intake conduit 3 to the lower chamber 21 , a second conduit 27, connecting lower chamber 21 to the upper chamber 23, and a third conduit 29, leading heated water toward exit conduit 17.
  • conduits 25 and 27 are manufactured as separate parts in respect of the separating element 19, as it can be seen clearly in fig. 3 of the attached drawings.
  • a one-way valve 29 is provided, with or without a suitable spring 31 , inside the conduit 27 connecting both of the chambers 21 and 23.
  • FIG. 1 the operation of the coffee machine, provided with the device 19 improving the boiler efficiency according to the present invention, will now be illustrated.
  • Arrows in fig. 1 show water flow during operation. Moved by the pump of the coffee machine, water is taken from the storing reservoir and enters the boiler 1 through entry conduit 3.
  • entry conduit 3 Through the first conduit 25, hermetically connected by means of ring 33 to entry conduit 3, water directly goes into the lower chamber 21 and therefrom, throughout the conduit 27 and corresponding one-way valve 29, water keeps its path until reaches the upper chamber 23 where, due to the particular arrangement of the resistance 5, coils of which wrap particularly said chamber 23, is properly heated very fast.
  • the chambers 21 and 23 of the boiler 1 are just simultaneously filled by water, because the spring 31 of the valve 29 is calibrated for compressing at not high pressure, certainly not lower than the pressure necessary to compress the spring 15 and allowing therefore opening of supply valve 13.
  • a solenoid valve placed at conduit 25 allows the decrease of the pressure in the lower chamber 21, assuring return of the gaskets 7 and 9 in non pressure position.
  • the device 19 for improving the boiler efficiency according to the present invention it is possible to speed up preparation of the next infusions, besides having better temperature and pressure conditions in the boiler than those in similar coffee machines of the prior art allowing to obtain a hotter coffee.
  • a further advantage in respect of the prior art is due to the fact that the decrease of pressure in the lower chamber 21 causes remaining water to be not too much hot and absolutely lacking of steam, thus allowing to take it back in the storing reservoir in the best conditions.
  • an outlet valve 50 which avoids dripping of the exit conduit 17, will now be described.
  • the re-start of the resistance 5 to heat water in the chamber 23 for the next coffee infusion indeed, could cause the existing pressure level in chamber 23 to increase thus moving the supply valve 13 and passing some drops of water throughout the exit conduit 17. Therefore, in order to avoid this phenomenon an outlet valve 50 is included in the present invention, setting its release pressure at a lower (about half) level than the set pressure level of the supply valve 13. In this manner said drops of water move from chamber 23, through the channel 30 and the solenoid valve in conduit 25, until they reaches the water reservoir.
  • An independent device improving the coffee "look” is also provided for the above described invention.
  • Said independent device is, indeed, able to produce a suitable amount of coffee cream during infusion. It is mounted on the coffee machine beneath the filter-holder container (either for capsules, or single paper dose, or coffee powder) and it preferably comprises three parts:
  • a supporting member 63 for a spring 65 is provided.
  • Said upper part 61 is attached to the coffee machine by fastening means such as threaded surface or bayonet seal, in a sealed manner assured by a suitable shape and coupling pressure exerted by previously disclosed gaskets 7 and 9.
  • the slot element 62 fixed to the upper part 61 , accommodates a sealing rubber head. It is also provided with a set of pre-calibrated holes 64 adapted to intake ambient air due to the Venturi effect during beverage flow therethrough, thus emulsifying coffee infusion. Said Venturi effect is generated by flow area reduction of the supporting member 63 containing said spring 65, which pushes the sealing rubber head at a pre-calibrated pressure. This pressure level is, of course, smaller than pressure level at the end of the exit conduit 17 but enough high to create the desired Venturi effect.

Landscapes

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

Abstract

La présente invention concerne une chaudière de machine à café (1) qui comprend une pompe à eau sous pression qui fournit de l’eau à travers un conduit d’entrée (3), un élément chauffant (5), tel qu’une résistance électrique, pour chauffer l’eau de chaudière, un ou plusieurs éléments d’étanchéité élastiques (7, 9) entre ladite chaudière (1) et un élément porte-filtre (11) en dessous, et une soupape d’alimentation (13), actionnée par un élément élastique ou de ressort (15) capable de faire passer, à la pression de tarage, de l’eau chaude de chaudière dans le filtre en dessous à travers le conduit de sortie entier (17). Un élément de séparation (19) est compris à l’intérieur de la chaudière (1) qui génère deux chambres (21) et (23) séparées hermétiquement à l’intérieur de la chaudière (1), la chambre (21 ) étant bornée en dessous par les éléments d’étanchéité élastiques (7, 9) et conçue pour générer la pression nécessaire pour le fonctionnement du mécanisme d’alimentation en eau au filtre dans le récipient porte-filtre en dessous, et la chambre supérieure (23) étant conçue pour chauffer, au moyen de l’élément chauffant (5), de l’eau d’infusion.
PCT/IB2006/003572 2005-12-06 2006-12-04 Chaudiere de machine a cafe WO2007066223A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2005002324 2005-12-06
ITMI20052324 ITMI20052324A1 (it) 2005-12-06 2005-12-06 Caldaia per macchina da caffe'

Publications (2)

Publication Number Publication Date
WO2007066223A2 true WO2007066223A2 (fr) 2007-06-14
WO2007066223A3 WO2007066223A3 (fr) 2008-03-06

Family

ID=38123266

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/003572 WO2007066223A2 (fr) 2005-12-06 2006-12-04 Chaudiere de machine a cafe

Country Status (2)

Country Link
IT (1) ITMI20052324A1 (fr)
WO (1) WO2007066223A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2050367A1 (fr) * 2007-10-19 2009-04-22 Gruppo Cimbali S.p.A. Machine à café automatique
CN102113823A (zh) * 2010-12-15 2011-07-06 李万红 一种壁挂式管路加热速沸袋水机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6082247A (en) * 1999-01-19 2000-07-04 Keurig, Inc. Apparatus for consecutively dispensing an equal volume of liquid
EP1460353A2 (fr) * 2003-03-18 2004-09-22 ILLYCAFFE S.p.A. Machine à café électrique
WO2005058110A1 (fr) * 2003-12-18 2005-06-30 Ariete S.P.A. Bouilloire a eau comprimee pour machines a cafe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6082247A (en) * 1999-01-19 2000-07-04 Keurig, Inc. Apparatus for consecutively dispensing an equal volume of liquid
EP1460353A2 (fr) * 2003-03-18 2004-09-22 ILLYCAFFE S.p.A. Machine à café électrique
WO2005058110A1 (fr) * 2003-12-18 2005-06-30 Ariete S.P.A. Bouilloire a eau comprimee pour machines a cafe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2050367A1 (fr) * 2007-10-19 2009-04-22 Gruppo Cimbali S.p.A. Machine à café automatique
CN102113823A (zh) * 2010-12-15 2011-07-06 李万红 一种壁挂式管路加热速沸袋水机

Also Published As

Publication number Publication date
WO2007066223A3 (fr) 2008-03-06
ITMI20052324A1 (it) 2007-06-07

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