WO1992016136A1 - Machine a boissons pour la preparation d'eau chaude pour infusions, en particulier du cafe ou du the - Google Patents

Machine a boissons pour la preparation d'eau chaude pour infusions, en particulier du cafe ou du the Download PDF

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Publication number
WO1992016136A1
WO1992016136A1 PCT/DE1992/000161 DE9200161W WO9216136A1 WO 1992016136 A1 WO1992016136 A1 WO 1992016136A1 DE 9200161 W DE9200161 W DE 9200161W WO 9216136 A1 WO9216136 A1 WO 9216136A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
heater
expansion tank
flow
tank
Prior art date
Application number
PCT/DE1992/000161
Other languages
German (de)
English (en)
Inventor
Georges Driesen
Georg Möthrath
Andreas Birk
Albrecht Weller
Heinz Schiebelhuth
Original Assignee
Braun Aktiengesellschaft
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 Braun Aktiengesellschaft filed Critical Braun Aktiengesellschaft
Publication of WO1992016136A1 publication Critical patent/WO1992016136A1/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
    • A47J31/04—Coffee-making apparatus with rising pipes
    • A47J31/057—Coffee-making apparatus with rising pipes with water container separated from beverage container, the hot water passing the filter only once i.e. classical type of drip coffee makers
    • A47J31/0573—Coffee-making apparatus with rising pipes with water container separated from beverage container, the hot water passing the filter only once i.e. classical type of drip coffee makers with flow through heaters
    • 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
    • A47J31/60—Cleaning devices
    • A47J31/605—Water filters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C02F1/003—Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices

Definitions

  • Beverage machine for preparing hot water for a brew drink especially coffee or tea
  • the invention relates to a beverage machine for preparing hot water for a brewed beverage, in particular coffee or tea, in which the brewing process takes place in that a certain amount of cold water flows several times from a storage container until it is emptied into a continuous-flow heater, while there the heating phase of the instantaneous water heater is heated and during its transport phase after a check valve closing in the direction of the storage container is closed, it is conveyed intermittently into a brewing unit from which the brewed beverage then flows into a collecting container, the instantaneous water heater providing a device for softening and / or or cleaning of the water (water filter) is connected upstream, through which all the water flowing to the continuous-flow heater must flow and an intermediate space is formed between the water filter and the continuous-flow heater.
  • Such a beverage machine is already known from FR-A-2.188.987.
  • a water filter is inserted into the housing of the storage container, which consists of a water reservoir and a water filter which is sealingly attached to its outlet opening.
  • the outlet opening of the water reservoir is separated from the water filter by a sieve through which water can penetrate, but dirt is retained.
  • the wall of the water reservoir runs parallel to the wall of the storage container and lies at least with its lower area, which is closer to the water filter, against the wall of the storage container.
  • the wall of the water filter is set back against the wall of the water reservoir in such a way that an intermediate space is created.
  • Line connected to an electric continuous-flow heater which heats the water and which, after it has been started up, conveys the heated water via a riser into a brewing unit filled with, for example, coffee grounds.
  • the intermediate space serves as an expansion tank and is connected to the atmosphere in such a way that water does not escape from the expansion tank into the atmosphere, but can always move in the direction of the instantaneous water heater so that the volume of the Expansion tank is dimensioned so large that it can at least absorb the amount of water delivered by the instantaneous water heater during its transport phase so that the water filter allows such a flow rate that at least such a large amount of water flows from the storage tank into the expansion tank in the time span composed of the transport phase and the heating phase.
  • the instantaneous water heater conveys into the brewing unit during its transport phase.
  • the continuous-flow heater always has at least as much purified water as is given to the brewing unit in the transport phase.
  • water filter water filter
  • the expansion tank does not extend to the level of the maximum fill level of the storage container, it is proposed according to a first embodiment that at such a height the wall of the expansion tank, when it reaches the water level of the expansion tank, at least what was conveyed by the water heater during its transport phase ⁇ water quantity, a further check valve is formed.
  • This check valve prevents water flowing in from escaping from the expansion tank, but allows air to enter the expansion tank after the transport phase.
  • the check valve is designed as a float valve which does not require spring forces to bring it into its closed position.
  • the expansion tank is connected to the atmosphere via a vent line, the free end of which extends to at least the maximum fill level of the storage tank. Because the free end of the vent line is constantly connected to the atmosphere, the water can completely unhindered, that is, without generating a negative pressure, are supplied to the instantaneous water heater.
  • the expansion tank is coupled to a level indicator working according to the principle of the tubes communicating with one another.
  • the level indicator can be formed by a float valve or by a display device that clearly indicates the level.
  • this arrangement has the advantage that an operator immediately recognizes when the water filter is clogged, since the fill level in the vent line would then only increase very slowly after filling the storage container. Furthermore, an operator can recognize when, after filling the reservoir, there is sufficient water in the expansion tank for a first first work cycle.
  • Fig. 1 shows a schematic representation of a coffee machine according to the invention, in which the ventilation pipe extends to the level of the maximum fill level of the storage container and
  • FIG. 2 shows a schematic illustration of a further exemplary embodiment of a beverage machine in which the vent pipe ends below the maximum fill level of the storage container.
  • the beverage machine 1 consists of a storage container 2 filled with water 6, which has an outlet opening 18 provided with a sieve 19 on its base 17.
  • the outlet opening 18 is a according to the Figs. 1 and 2 downwardly extending water filter 8 is used, which seals the wall of the outlet opening 18 so that only water 6 can penetrate into the water filter 8 via the sieve 19.
  • the water filter 8 serves as a device for softening and / or cleaning the water flowing out of the reservoir 2.
  • the outlet opening 18 follows the FIGS. 1 and 2 down to an expansion tank 9, in the intermediate space 10 of which the water filter 8 is located.
  • the water filter 8 is delimited by a wall 21 which tapers in cross section to its bottom 20.
  • the expansion tank 9 has a bottom 23, according to FIG. 1, below the bottom 20 of the water filter 8, into which a pipe 24 opens.
  • the intermediate space 10 formed between the water filter 8 and the expansion tank 9 serves as a collecting space for the water cleaned in the water filter 8.
  • the vertical section 25 of the pipeline 24 according to FIGS.
  • check valve 27 which closes in the direction of the water filter 8 or the storage container 2 and which essentially consists of a float ball 28 which, in order to block the pipeline 24, bears sealingly against a sealing seat 29 formed in section 25. 1 and 2, the check valve 27 is only shown schematically and is open.
  • the wall 22 of the expansion tank 9 is provided with a ventilation line 12 which first runs horizontally below the base 17 and then runs vertically, that is to say parallel to the storage tank 2.
  • the wall facing the storage container 2 also forms the right wall of the storage container 2 according to FIG. 1, so that the vent line 12 forms a component with the storage container 2, but it is nevertheless a separate container.
  • the ventilation line 12 forms, together with the intermediate space 10, the expansion tank 9.
  • the right wall of the ventilation line 12 according to FIG. 1 is followed by a chamber 30 which extends over the entire height of the storage container 2 and which is at the bottom in FIG. 1 End 31 has an opening 32 which connects the chamber 30 to the vent line 12. Because of the communicating tubes, the same level as in the storage container 2 is always present in the chamber 30 and in the vent line 12 if the water filter 8 is given sufficient time to pass through the water.
  • the water filter 8 designed as a filter cartridge is screwed, for example according to FIG. 1, to the outlet opening 18 via its upper edge and can therefore, if the filter material 33 located in the water filter 8, which fills the entire space of the water filter 8, is exhausted, can be replaced by removing it from the storage container 2.
  • a float body 34 which indicates the respective fill level of the storage container 2.
  • the chamber 30 and the vent line 12 are closed at their free ends 13 by a cover (not shown in the drawing) to the extent that air can enter or exit.
  • the storage container 2 can also be closed by a cover, not shown in the drawing, which can be removed or opened for filling water up to its maximum level and for replacing the filter cartridge 8.
  • the pipeline 24 is connected to a continuous-flow heater 3 arranged below the expansion tank 9, which essentially consists of an annular space 35 serving as a channel, in the wall of which a heating conductor 36 is embedded in an insulated manner.
  • the heating conductor 36 consists of a heating wire wound around the channel 35, which can be connected to an electrical energy source 40 via connecting wires 38, 39.
  • the instantaneous water heater 3 is in thermal contact with a storage plate 41 arranged above the instantaneous water heater 3, on which a collecting container 7 is placed. Above the collecting container 7 there is a brewing unit 4 consisting of a filter housing 42 and a paper filter 43 inserted therein, which is attached to the housing of the beverage machine 1, not shown in the drawing.
  • the filter housing 42 has at its bottom 44 an outlet opening 45, from which the brewed beverage 5 can flow off into the collecting container 7.
  • the collecting container 7 is closed with a lid 46, which has an inlet opening 47 for the inlet of the brewed beverage 5 into the collecting container 7.
  • a riser 48 which, with its open end 49, opens into the opening 50 of the brewing unit 4.
  • ground coffee 51 which can also be replaced by tea leaves for brewing tea.
  • FIG. 2 the part dealing with the instantaneous water heater 3, the collecting container 7, the brewing unit 4 and the riser 48 according to FIG. 1 has been omitted for the sake of simplicity.
  • the drinking machine 1 according to FIG. 2 differs from that according to FIG.
  • This further check valve 11 also, like the check valve 27, consists of a float ball 57 which, when the storage container 2 is filled with water, bears sealingly against another sealing seat 53 formed on the inner wall of the ventilation line 12, so that no water is present at this point can flow to the atmosphere.
  • the fill level indicator 15 is shown in the same plane as the vent line 12, that is to say the fill level indicator 15 can of course also be formed at a different location on the storage container 2 or on the housing of the beverage machine 1.
  • the mode of operation of the beverage machine 1 according to the invention is as follows:
  • water 6 is introduced into the storage container 2 according to FIG. 1, this flows through the sieve 19 into the water filter 8, where it is cleaned and / or decalcified.
  • the water then passes through the passages 54 formed in the bottom 20 of the water filter 8 and first reaches the deepest space of the expansion tank 9, from where it reaches the pipeline 24 via the open check valve 27.
  • Cleaned water now flows into the pipeline 24 and the continuous-flow heater 3 until the level in the riser 48, in the vent line 12, in the level indicator 15 and in the reservoir 2 is the same.
  • the expansion tank 9 is completely filled with purified water. If the connecting wires 38, 39 are now connected to the electrical energy source 40 by a switch (not shown), the heating conductor 36 heats up and releases its heat to the water in the annular space 35.
  • the total volume flow V3 is composed of the volume flow VI through the water filter 8 and the volume flow V2 from the expansion tank 9, the volume flow VI being relatively low since the water filter 8 represents a relatively large flow resistance. The largest part of the volume flow, which is made available to the instantaneous water heater 3, is thus supplied by the amount of water in the expansion tank 9.
  • the level in the vent line 12 drops compared to that in the reservoir 2 when the cross section of the vent pipe 12 is relatively small.
  • the subsequent heating of the water in the continuous-flow heater takes a predetermined period of time, in accordance with the size of the heating power of the heating conductor 36 and the cross-sectional size of the annular space 35 of the continuous-flow heater 3, in which the water filter 8 replaces the amount of water flowing to the continuous-flow heater 3. Since the water filter 8 one for that allows sufficient flow rate, the expansion tank 9 is always filled with water still present in the storage tank 2 before the start of the next transport phase of the continuous-flow heater 3.
  • the expansion tank 9 is only emptied when all the water 6 has drained from the storage tank 2.
  • the continuous-flow heater 3 then pumps heated water into the brewing unit 4 as long as there is still water in the expansion tank 9 and in the pipeline 24.
  • conventional instantaneous water heaters 3 which were used in beverage machines without water filters 8, can also be used without the conveying performance of the instantaneous water heater being impaired.
  • the beverage machine 1 shown in FIG. 2 works in exactly the same way as the beverage machine 1 shown in FIG. 1, but with one exception, namely that the further check valve 11 opens during the suction process; because when the fill level in the vent line 12 drops, the further float ball 52 moves away from the sealing seat 53 and establishes a connection between the expansion tank 9 and the atmosphere. In the heating phase, the fill level in the vent line 12 then rises again until the further float ball 52 closes the further sealing seat 53.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Apparatus For Making Beverages (AREA)

Abstract

La machine à boissons (1) présente au-dessous du réservoir de stockage (2) un réservoir de compensation (9), dans lequel est placé un filtre à eau (8) et lequel est relié par l'orifice de sortie (18) au réservoir de stockage (2). Le réservoir de compensation (9) est relié par une conduite d'évacuation d'air (12) à l'atmosphère de telle manière que l'eau (6) ne peut pas sortir du réservoir de compensation (9) vers l'extérieur, mais peut toujours se déverser vers le chauffe-eau instantané (3). Le volume du réservoir de compensation (9) est dimensionné de telle façon qu'il peut accueillir au moins la quantité d'eau fournie par le chauffe-eau instantané (3) pendant sa phase de transport, le filtre à eau (8) permettant une vitesse d'écoulement telle, que pendant le laps de temps représenté par la phase de transport et la phase de chauffage, une quantité d'eau au moins égale à celle fournie par le chauffe-eau instantané (3) pendant sa phase de transfert vers l'unité d'infusion (4) s'écoule du réservoir de stockage (2) dans le réservoir de compensation (9). Cela permet que le débit du chauffe-eau soit, en fonction du débit calorifique, pratiquement exactement aussi grand que s'il n'y avait pas de filtre à eau dans la machine à boissons (1).
PCT/DE1992/000161 1991-03-16 1992-02-27 Machine a boissons pour la preparation d'eau chaude pour infusions, en particulier du cafe ou du the WO1992016136A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4108631.7 1991-03-16
DE19914108631 DE4108631A1 (de) 1991-03-16 1991-03-16 Getraenkemaschine zum zubereiten von heissem wasser fuer ein bruehgetraenk, insbesondere von kaffee oder tee

Publications (1)

Publication Number Publication Date
WO1992016136A1 true WO1992016136A1 (fr) 1992-10-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1992/000161 WO1992016136A1 (fr) 1991-03-16 1992-02-27 Machine a boissons pour la preparation d'eau chaude pour infusions, en particulier du cafe ou du the

Country Status (3)

Country Link
AU (1) AU1344892A (fr)
DE (1) DE4108631A1 (fr)
WO (1) WO1992016136A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995003733A1 (fr) * 1993-07-29 1995-02-09 Moulinex S.A. Machine a infusion comportant un dispositif de purification d'eau
FR2729841A1 (fr) * 1995-01-31 1996-08-02 Krups Fa Robert Filtre a eau
WO2007093352A1 (fr) * 2006-02-14 2007-08-23 Aquis Wasser-Luft-Systeme Gmbh, Lindau, Zweigniederlassung Rebstein Cartouche de filtre destinee a etre inseree dans un reservoir d'eau
US20140208952A1 (en) * 2013-01-30 2014-07-31 Hamilton Beach Brands, Inc. Kitchen Appliance for Preparing a Beverage and Method of Operating Same
CN109700322A (zh) * 2019-01-15 2019-05-03 佛山市顺德区美的饮水机制造有限公司 智能冲泡机的步进加热方法及步进加热装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4130446A1 (de) * 1991-09-13 1993-03-25 Braun Ag Bruehgetraenkemaschine
DE19756479C2 (de) * 1997-12-18 2000-08-31 Horst Ellsel Wasseraufbereitungsgerät
FR2968183B1 (fr) * 2010-12-06 2014-02-14 Seb Sa Appareil electromenager de preparation de boissons a base d'eau chaude a double reservoir

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2568474A (en) * 1949-04-28 1951-09-18 Earl T Van Sciver Automatic water heater for beverages
DE2256527A1 (de) * 1971-11-19 1973-05-30 Robert L Weber Aufgussgeraet
FR2188989A1 (fr) * 1972-06-16 1974-01-25 Cometto Ets
DE8533993U1 (de) * 1985-12-03 1987-04-02 Bosch-Siemens Hausgeräte GmbH, 8000 München Elektrische Kaffeemaschine
EP0302358A1 (fr) * 1987-08-06 1989-02-08 Melitta-Werke Bentz & Sohn Chaffe-eau instantané pour machines à café ou à thé
EP0324634A2 (fr) * 1988-01-15 1989-07-19 Ara Coffee Club Limited Appareil pour l'infusion du thé ou du café, incluant un purificateur d'eau

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3014493A1 (de) * 1980-04-16 1981-10-22 Emide-Metallindustrie Gebr. Streicher, 7209 Denkingen Haushaltsgeraet mit heisswasserbereiter
DE8426209U1 (de) * 1984-09-05 1985-07-25 Melitta-Werke Bentz & Sohn, 4950 Minden Vorratsbehälter mit einer Dosierkammer
DE4104878A1 (de) * 1991-02-18 1992-08-20 Melitta Haushaltsprodukte Kaffee- oder teemaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2568474A (en) * 1949-04-28 1951-09-18 Earl T Van Sciver Automatic water heater for beverages
DE2256527A1 (de) * 1971-11-19 1973-05-30 Robert L Weber Aufgussgeraet
FR2188989A1 (fr) * 1972-06-16 1974-01-25 Cometto Ets
DE8533993U1 (de) * 1985-12-03 1987-04-02 Bosch-Siemens Hausgeräte GmbH, 8000 München Elektrische Kaffeemaschine
EP0302358A1 (fr) * 1987-08-06 1989-02-08 Melitta-Werke Bentz & Sohn Chaffe-eau instantané pour machines à café ou à thé
EP0324634A2 (fr) * 1988-01-15 1989-07-19 Ara Coffee Club Limited Appareil pour l'infusion du thé ou du café, incluant un purificateur d'eau

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995003733A1 (fr) * 1993-07-29 1995-02-09 Moulinex S.A. Machine a infusion comportant un dispositif de purification d'eau
FR2708452A1 (fr) * 1993-07-29 1995-02-10 Moulinex Sa Machine à infusion comportant un dispositif de purification d'eau.
US5860354A (en) * 1993-07-29 1999-01-19 Moulinex S.A. Infusion machine including a water purification device
FR2729841A1 (fr) * 1995-01-31 1996-08-02 Krups Fa Robert Filtre a eau
EP0726054A2 (fr) * 1995-01-31 1996-08-14 Robert Krups GmbH & Co. KG Filtre à eau
EP0726054A3 (fr) * 1995-01-31 1996-08-21 Krups Fa Robert
US5800707A (en) * 1995-01-31 1998-09-01 Robert Krups Gmbh & Co. Kg Water filter
WO2007093352A1 (fr) * 2006-02-14 2007-08-23 Aquis Wasser-Luft-Systeme Gmbh, Lindau, Zweigniederlassung Rebstein Cartouche de filtre destinee a etre inseree dans un reservoir d'eau
US8177969B2 (en) 2006-02-14 2012-05-15 Aquis Wasser-Luft-Systeme Gmbh, Lindau, Zweigniederlassung Rebstein Filter cartridge for use in a water storage tank
US20140208952A1 (en) * 2013-01-30 2014-07-31 Hamilton Beach Brands, Inc. Kitchen Appliance for Preparing a Beverage and Method of Operating Same
CN109700322A (zh) * 2019-01-15 2019-05-03 佛山市顺德区美的饮水机制造有限公司 智能冲泡机的步进加热方法及步进加热装置

Also Published As

Publication number Publication date
AU1344892A (en) 1992-10-21
DE4108631A1 (de) 1992-09-17

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