• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A device for preparing a coffee product comprises a preparation cart (135) which is intended and adapted to receive a quantity of ground coffee and to collect it in a coffee bed (125) and pumping means (15) for supplying water under elevated pressure to the preparation cart . The preparation cart (135) is provided with a water inlet (136) for water at elevated temperature and pressure on a first side of the coffee bed (125) and with an outlet (137) on an opposite side beyond the coffee bed (125). The outlet is coupled via a liquid line (20) to an outlet (6) from which the coffee product can be taken. The device is provided with an electronic control system (17) which each time imposes a preparation cycle for the preparation of a product. Thereby, in the liquid line (20) between the outlet (137) of the preparation trolley (135) and the outlet (6), from which the coffee product is removable, an adjustable restriction (30) is included with a passage (35) passed through the control system (17) Is proportionally adjustable and controllable.
    公开号:NL2020838A
    申请号:NL2020838
    申请日:2018-04-26
    公开日:2018-11-02
    发明作者:Adri Brijder Eduard；De Groen Cornelis
    申请人:J M De Jong Duke Automatenfabriek B V；
    IPC主号:
    专利说明:

    Netherlands Patent Office © Application number: 2020838 © Application filed: April 26, 2018 © A PATENT APPLICATION © Int. CL:
    A47J 31/36 (2018.01)
    © Priority: © Applicant (s): 28 April 2017 NL 2018804 J.M. de Jong Duke Automatenfabriek B.V.in Sliedrecht. © Application registered:November 2, 2018 © Inventor (s):Eduard Adri Brijder in Gorinchem. © Request published: Cornelis de Groen in Hendrik Ido Ambacht. November 2, 2018 © Authorized representative:A.A. Jilderda in Eindhoven.
    éi) Device for preparing a coffee product
    A device for preparing a coffee product comprises a preparation chamber (135) which is intended and adapted to receive a quantity of ground coffee and to collect it in a coffee bed (125) and pump means (15) for supplying water under elevated pressure to the preparation chamber . The preparation chamber (135) is provided with a water inlet (136) for water at elevated temperature and pressure on a first side of the coffee bed (125) and with an outlet (137) on an opposite side beyond the coffee bed (125). The outlet is coupled via a liquid line (20) to an outlet (6) from which the coffee product can be taken. The device is provided with an electronic control system (17) which each time imposes a preparation cycle for the preparation of a product. Thereby, in the liquid line (20) between the outlet (137) of the preparation chamber (135) and the outlet (6), from which the coffee product is removable, an adjustable restriction (30) is included with a passage (35) passed through the control system (17) Is proportionally adjustable and controllable.
    NL A 2020838
    This publication corresponds to the documents originally submitted.
    Device for preparing a coffee product
    The present invention relates to a device for preparing a coffee product, comprising a preparation chamber which is intended and adapted to receive a quantity of ground coffee and to collect it in a coffee bed and provided with pumping means for transferring hot water to the preparation chamber under elevated pressure. the preparation chamber is provided with a water inlet for the inlet of water at elevated temperature and pressure on a supply side of the coffee bed, the preparation chamber being provided with an outlet on an outlet side beyond the coffee bed, the outlet being coupled via a product line with a spout from which the coffee product can be taken, and wherein the device is provided with an electronic control system which in each case imposes a preparation cycle for the preparation of a product.
    Such a device is used on a large scale, for example for domestic use, in an office environment or in a catering establishment. The device can optionally be provided with a coffee grinder to which a bean container is coupled for coffee beans or comprise a holder for ground coffee. In both cases, ground coffee is introduced into the preparation chamber during the preparation cycle and compressed into a coffee bed between two chamber bottoms. Thereafter, hot water is forced through the coffee bed under increased pressure to provide an extract for the desired coffee product. At the end of the brewing cycle, the brewing chamber is freed from the coffee thus consumed and the brewing chamber is restored to its initial state.
    Depending on the amount of coffee, the grinding degree and / or the compactness of the coffee bed after it is pressed, the product received at the spout will vary in quality and composition. Nevertheless, it is usually intended to provide a constant quality and composition per type of coffee product, such unintended fluctuations being undesirable. In addition, it would be desirable to be able to prepare various coffee products with the same device.
    The present invention has for its object, inter alia, to provide a device for preparing a coffee product which meets one or more of these wishes.
    To achieve the intended object, a device for preparing a coffee product of the type described in the preamble according to the invention has the feature that between the outlet of the preparation chamber and the outlet from which the coffee product is removable, the product line has an adjustable valve device with an adjustable restriction of which a smallest passage through the control system is proportionally adjustable and controllable. The invention is based on the insight that in the preparation of a coffee product, in addition to the pressure and the temperature of the hot water, the lead time is also an important parameter for the final composition and quality of the product. At a given pump setting, the pressure and lead time are determined by the resistance of the total brewing system. By applying an adjustable restriction, and ditto resistance, in the downstream conduit of the preparation chamber, this total resistance is no longer determined solely by the resistance of the coffee bed. Relatively small fluctuations in, for example, the amount of coffee dosed, a possible pressing force of the coffee bed and the grinding degree or quality of the grind, which would otherwise have a significant influence on the pressure and the throughput time, thus play (relatively) less significant role. By applying an additional resistor in the system, that of the coffee bed becomes less determining for the whole. The invention thus contributes to a stable coffee quality of the end product.
    Moreover, by means of such a valve device with an adjustable restriction, it is possible to control the resistance of the system during the preparation of the product. Thus disturbing influences, such as the almost inevitable fluctuations in the coffee bed described above, can be compensated. A preferred embodiment of the information in that connection according to the invention has the feature that a flow sensor is provided for registering a magnitude of a volume flow of the product and for providing it with an electronic value.
    -3 control system output, wherein the control system controls the restriction depending on the recorded volume flow rate. Instead of in the fresh water supply line, such a sensor can also be included directly in the outgoing product line to the outlet. A further special embodiment of the device according to the invention therefore has the feature that the flow sensor is included in the product line between the outlet and the outlet. On the basis of the thus recorded value of the product volume flow rate, the control system controls the adaptable restriction more or less openly tuned to a control value stored in advance in a memory of the control system for the product to be prepared.
    Thanks to the controllable restriction in the system, the control system is thus able to regulate and control both the (counter) pressure and lead time during the release of the product on the basis of the perceived volume flow. If desired, it is thereby possible to allow different profiles depending on the user's choice, for example both low-pressure coffee for a softer taste, comparable to conventional filter coffee, and coffee under high (counter) pressure, for preparing an Italian espresso. At a lower pressure, a larger volume flow will usually take place, whereby, moreover, the preparation time is considerably shortened. This offers a relatively large amount of coffee in a relatively short time.
    In a particularly practical embodiment, the information according to the invention is characterized in that the valve device comprises the smallest passage in a fluid channel between a valve member and a valve housing, wherein a flow resistance of the fluid channel through the control system can be controlled by an adjustment of the valve member relative to the valve member. valve housing. By such an adjustment of the valve member, the resistance of the channel can thus be varied and thus the back pressure which is exerted by the channel. This resistance is dependent on both a length and a cross-section of the channel and can therefore be made adjustable via each of these quantities or via both by squeezing the channel more or less or by lengthening the channel or shortening it.
    A special embodiment of the device according to the invention is characterized in that the valve member comprises a conical needle which is suitably received in a passage opening of the valve housing, which needle is axially displaceable relative to the passage opening and is thereto coupled to an actuator, which is controlled by the control system, and in a first extreme position completely closes the passage opening and in a second extreme position releases the passage opening at least substantially. The displacement of the needle is hereby automatically controlled and controlled by the control system, which starts depending on the actuator. The needle can thereby be output, for example, depending on a perceived volume flow in the device, either before or after the preparation chamber.
    In a further special embodiment, the device according to the invention is herein characterized in that the needle axially starts from a screw spindle which is received in an at least substantially complementary screw cavity, wherein the screw spindle is coupled to an output shaft of an electric motor, in particular a stepper motor. By thereby giving the spindle more or fewer rotations in the screw cavity, the needle coupled thereto can be introduced axially more or less far into the passage, whereby the flow resistance of the restriction can be adjusted. A preferred embodiment of the device has the feature that an axially adjustable shaft part with adaptive length is provided between the screw spindle and the output motor shaft. The actuator can thus remain stationary regardless of the penetration depth of the spindle into the screw cavity, which is an important advantage from a structural point of view.
    In a further particular embodiment, the device according to the invention is characterized in that the valve housing comprises a valve cavity and the valve member has a valve body which is closely received therein, that the fluid channel is formed between an inner wall of the receiving cavity and an outer wall of the valve body, and that valve body is adjustable with respect to the receiving cavity. By an axial translation and / or a radial rotation of the valve member in the
    In this case, the valve cavity allows the channel to be released more or less between an inlet and an outlet of the valve device and thus the resistance of the channel can be adjusted by the control system as required. A further special embodiment of the device according to the invention is herein characterized in that the liquid channel extends in at least one groove in at least one of the inner wall of the valve cavity and the outer wall of the valve body accommodated therein.
    In a first further special embodiment, the device according to the invention is characterized in that a length of the channel is adjustable by axial displacement of the valve body to at least partly outside the valve cavity. Thus, the length of the restriction imposed on the product flow through the channel can be shortened and thus the resistance thereof reduced by sending the valve body out of the valve cavity, so that the path that the product flow must travel through the relatively narrow channel is reduced. A preferred embodiment of the device according to the invention is herein characterized in that the valve body comprises a cylinder body and that the groove in its outer wall runs helically. Such a helical groove has a relatively large length per linear length of the valve body. Already a slight adjustment of the valve body to the outside of the valve cavity therefore has a significant influence on the resistance of the channel. The valve device can therefore be of relatively compact design.
    In a second further special embodiment, the device according to the invention is characterized in that the groove extends from one end of the valve body in the axial direction over at least a part of a length of the valve body into the outer wall thereof and thereby rejuvenates. More in particular, the device according to the invention is herein characterized in that the groove is V-shaped both in a lateral cross-section and in a cross-section, and widens at the end. By sending the valve body outside the valve cavity, the channel will not shorten so much, but more importantly the smallest effective cross-section thereof
    - narrowing due to the rejuvenating nature of the groove. As a result, the flow resistance of the valve device will increase considerably.
    A further preferred embodiment of the information is characterized according to the invention in that within the preparation cycle the restriction is controlled at least briefly at least substantially completely open. In this case, for example, the restriction is opened at least almost completely after every preparation cycle, so that a virtually unobstructed passage is obtained. In the case of an adjustable needle, this means that the needle is moved out of the passage, creating a relatively large opening. The risk of clogging the previously relatively narrow passage as a result of the coffee residue remaining therein can thus be reduced to a minimum.
    The device according to the invention also allows for more variation in the brewing cycle of the coffee product. In particular, the invention makes it possible to vary the system pressure and lead time during a brewing cycle in order to thus realize a different and / or better coffee quality. To this end, a further particular embodiment of the device according to the invention has the feature that during a preparation cycle the control system imposes a number of predetermined positions, each during a certain period of time, on the restriction. With a coffee product, therefore, not only one pump pressure is imposed, but on the other hand, a pressure profile is run through with a number of steps and associated step durations.
    More in particular, a particular embodiment of the device according to the invention is characterized in that the control system comprises an electronic memory in which at least one recipe is stored that can be retrieved by the control system and which defines the positions and an associated duration within the preparation cycle. Hereby it is possible to define different coffee products in terms of, for example, dispensing quantity, lead time and pump pressure, and to record these as recipes in the control system. The preparation of a coffee product with such a device is thereby raised to a higher level.
    According to the invention, a further special embodiment of the device has the feature that the control system comprises a user interface that enables a user to select a recipe from a number of recipes and to assign it to the control system. This embodiment offers the user a possibility to select a coffee product as desired and to have it prepared by the information.
    The invention will be explained in more detail below with reference to an exemplary embodiment and an accompanying drawing. In the drawing:
    figure 1 schematically a construction of an exemplary embodiment of a device according to the invention; figure 2 a detail drawing of an embodiment of an adjustable valve device as used in the device of figure 1; figure 3A-B in section, the valve device of figure 2 in various positions: figure 4 in cross section a second embodiment of a second embodiment of an adjustable valve device, as applicable in the device of figure 1; figures 5A-D the valve device of Figure 4 in different positions; Figures 6A-C in perspective view a further embodiment of an adjustable valve device, as applicable in the device of figure 1, in different positions: figure 6D a sectional view of the controllable valve device of Figs. 6A-6C in successive stages with an increasing passage; and figure 7 a detail drawing of the valve member of the valve device of figures 6A-6D.
    It should be noted, incidentally, that the figures are drawn purely schematically and not always on (the same) scale. In particular, for the sake of clarity, some dimensions may be exaggerated to a greater or lesser extent. Corresponding parts are designated in the figures with the same reference numeral.
    Figure 1 generally shows a structure of a device for preparing a coffee product under pressure from a coffee grind. Such a device is also commonly referred to as a fully automatic espresso machine. The device comprises a compact housing 10 with a control panel 5 for a user, with which the user can enter a number of choices and a spout 6 above a cup platform 7 from which the user can purchase a selected coffee product 8. That coffee product varies, for example, from relatively strong, referred to as ristretto / espresso, to relatively diluted, referred to as coffee or lungo.
    In the embodiment shown, the device comprises a fixed water connection 16 for connection to a water supply network, but can instead also be equipped with a water reservoir which in that case must be topped up periodically. An electronic flow sensor 25 constantly registers a liquid flow in the system and a fresh water inlet tuned to it. The device further comprises a bean container 11 which opens into a mouth of a coffee grinder 12 which is received within a housing 10 of the device. Instead of a single bean container 11, the device can also be designed with a number of bean containers, for example two, whether or not each with a separate coffee grinder 12, each with a different type of coffee or merely to increase the stock in the machine. And instead of or in addition to unground coffee beans, the device can also be adapted to the processing of ground coffee, in which case a coffee grinder in the device can be omitted. In addition, one or more additional reservoirs may optionally be provided in the housing for holding related soluble products which are added to the product to be prepared, such as for instance sugar, milk powder (topping) and / or chocolate powder.
    The device is fully automatically controlled by a central control system which imposes a specific operating time on the coffee grinder 12 and thus determines a coffee dosage. This dose of ground coffee slides through a filling opening 133 into a wall of a preparation unit 13 into a cylindrical preparation chamber 135 which is bounded on either side by opposite chamber bottoms 131,132. A first of
    Both chamber bottoms 131 are then axially movable in the preparation chamber 135 beyond the filling opening 133 to thereby compress the received coffee powder 125 into a compact coffee bed 139. An inlet 136 for hot water is also provided therein by means of a pump 15. a boiler 14. or via flow-through heating, is passed under increased pressure to the preparation chamber 135 and through the coffee bed 125. The opposite chamber floor 132 comprises a screen 138 which prevents coffee powder from escaping from the preparation chamber. Furthermore, the opposite chamber wall 132 comprises an outlet 137 which is connected via a discharging product line 20 to the outlet 6 on the outside of the housing 10. At the outlet 6 a coffee product extracted in the preparation chamber can be taken off, optionally supplemented with one or more of the aforementioned additives such as sugar and milk (powder). At the end of a brewing cycle, the spent coffee bed 125 is ejected from the brewing chamber 135 and the brewing unit 13 returns to its original initial state; ready for a subsequent preparation cycle.
    A fluid pressure build-up in the system during a preparation cycle depends on the flow resistance and on the back pressure in the device. This is initially determined by the resistance of the compressed coffee bed 125 and is therefore dependent on the dosed amount of coffee, the grinding degree (fineness) and the compactness of the bed (pressing force). In order to allow variations, intentional or otherwise, in one or more of these parameters to be of less influence on the final coffee quality, a controllable valve device 30 is included in the downstream pipe 20 of the brewing chamber with an adjustable restriction therein. This valve device 30 is shown in more detail in Figure 2 and in sections in Figures 3A and 3B. A passage thereof is proportionally adjustable and controllable by the control system 17.
    The valve 30 is controlled during a brewing cycle from the central control system 17, which also controls the other components of the system, such as for example the coffee grinder 12 and the brewing unit 13. Thereby
    The electronic flow sensor 25 is also coupled to the control system 17 in order to record a current magnitude of the volume flow in the system and to provide it as a value to the control system 17. Instead of in the fresh water supply line, such or comparable sensor can also be included directly in the outgoing product line. On the basis of the thus recorded value of the product volume flow rate, the control system 17 controls the valve 30 more or less openly tuned to a control value stored in advance in a memory of the control system 17 for the product to be prepared.
    The valve 30 in this example comprises a needle valve with a conical needle 31 as a valve member which fits into a passage opening 35 in the valve housing 36 of the valve 30, but which is axially displaceable therein to squeeze the passage opening 35 more or less or completely free to give. In a first extreme position, see figure 3B, the conical needle 31 protrudes into the passage opening 35 and is thus virtually completely closed, while the needle 31 in a second extreme position, see figure 3A, is completely withdrawn from the passage opening around the opening 35 to be released completely.
    The needle 31 axially starts from a screw spindle 32 which engages in a corresponding spindle cavity 33, see also figure 2. The spindle 32 is in turn coupled to an actuator in the form of an electronic stepper motor 38 which is also controlled by the control system 17 . In the coupling 34 between the stepper motor 38 and the spindle 32, a shaft part 341, 422 is provided with an axially adjustable length. For this purpose, this shaft part comprises two mutually telescopic parts 341, 422 which are disengaged by a spring 343, but which can make one stroke against each other in a stroke that is sufficient around the spindle 32 and needle 31 between completely out of the passage 35 of the valve and be able to move completely in the passage 35. These extreme positions are shown in detail in the sections of Figures 3A and 3B, respectively. Through a proportional control of the stepper motor 38, all intermediate positions between them are also adjustable.
    The control system 17 sends out the needle 31 more or less on the basis of the volume flow registered by the sensor 25, so as to adjust and maintain the system resistance of the device to a desired and predetermined value. Optionally, different system resistances can be used during parts of a brewing cycle in view of a desired coffee quality and / or coffee specialty. As a result of the resistance raised by the valve 30, any fluctuations in a resistance of the coffee bed 125 have relatively less influence on the total resistance of the system and can be at least partially compensated for by means of the controllable restriction.
    At the end of a preparation cycle, the control system 17 preferably briefly fully opens the restriction 30 to prevent deposits and clogging therein. For a thorough cleaning, the device is furthermore provided with a flushing line whereby hot water can be led from the boiler as flushing water through the system under control of the control system. The rinsing lines and control valves used for this purpose are incidentally, just like a system of control valves in the brewing system, not shown in detail for the sake of clarity, but in reality also present.
    The present invention is by no means limited to the use of the valve device shown in Figure 2. Figure 4 therefore shows, by way of example, an alternative valve device which can be used within the scope of the invention. The valve device herein comprises a coherent system component with an inlet chamber 41, a valve housing 42 and an outlet chamber 43 which seamlessly connect to each other and are mutually watertightly connected through the interposed gaskets provided for this purpose. The inlet chamber 41 comprises a connection 411 for the product line 20 upstream of the valve, while a corresponding connection 433 on the outlet chamber 43 is provided for a downstream connection of the product line 20.
    -12 Inside the valve housing 42 there is a central bore 421 in which a valve member 422 can be axially tightly closed. The valve member essentially comprises a cylindrical valve body which is provided in a circumferential wall with a groove 423 which spirals around a cylinder axis of the body. The groove 423 thus forms a liquid channel that runs helically with an pitch and at an angle between an inner wall of the bore 421 and the peripheral wall of the valve body 422. By giving it a smaller pitch and / or a greater inclination with the cylinder axis channel longer per linear millimeter of valve body 422; with a greater pitch and / or smaller inclination, this channel will be relatively shorter per linear millimeter of the valve body 422.
    The valve body 422 starts from a retention needle 424 which protrudes through a bore of the outlet chamber 43 and closes therein tightly through an o-ring 425. The retention needle 424 is in turn coupled to a threaded end 426 with a defined pitch. The threaded end is received in a complementary screw bore from the outlet chamber 433 and driven by a stepper motor (not shown). A rotation of the stepper motor thus translates into an axial displacement of the valve body 422 in the valve cavity 421, which displacement is determined by the pitch of the threaded end 426.
    As a result of this axial displacement, the valve body 422 further protrudes less far into the valve cavity 421. This is shown in Figures 5A-5D for different positions. In a first extreme position, Figure 5A, the valve body is still completely outside the valve cavity 421 and the valve offers no resistance whatsoever. The valve is now fully open. However, if the valve body 422 is received in the valve cavity, Figure 5B. the liquid is forced through the helical channel formed between the inner wall of the cavity 421 and an outer wall of the valve body 422 by the groove 423 provided therein. The flow resistance thereof depends on an effective cross-section, transverse to the liquid flow, of the channel in combination with a length of the channel. The latter is determined by the extent to which the valve body protrudes into the valve cavity and is thus in operation of the
    -13 device proportionally adjustable. To this end, the stepper motor is controlled by the control system 17. A variation of this resistance per revolution is thereby determined by the variation in length of the liquid channel caused thereby, which in turn is imposed by the pitch and inclination of the helix according to which the groove 423 into the wall of the valve body. This resistance is maximal in the state shown in Figure 5C where the liquid has to travel the full path through the groove 423; whereas in Fig. 5D the valve is even completely closed in that the groove 423 hereby ends up against the wall of the valve cavity 421.
    The control system 17 controls the valve body 422 more or less on the basis of the volume flow registered by the sensor 25 so as to adjust and maintain the system resistance of the device to a desired and predetermined value. Optionally, different system resistances can be used during parts of a brewing cycle in view of a desired coffee quality and / or coffee specialty.
    A third variant for the valve device is shown in Figure 6a-6C in conjunction with Figure 7. The rough structure of the valve device is comparable to that of the second embodiment with an inlet chamber 61, a valve housing 62 and an outlet chamber 63 on which a downstream connection 631 for the product line 20 is provided. The inlet chamber has a corresponding upstream connection outside the picture of the drawing.
    In this example, a needle 632 protrudes into a central bore 631 of the valve housing, which needle is received therein tightly, but is axially accepted therein. At one end one or more v-shaped grooves 623 are provided in a peripheral wall of this needle 622, see also figure 7. These groove or grooves 623 open at a free end of the needle 622 in the outlet chamber 63 and thus define a fluid channel which is imposed on the liquid.
    In a similar manner as in the second exemplary embodiment, the needle 632, through the intervention of a shaft part 624, starts from a thread end 626 which is coupled to a stepper motor. An o-ring 625 thereby provides a desired liquid barrier in the valve cavity 631. The stepper motor is controlled by the control system 17 of the device, whereby the needle 622 is freed more or less far from the valve cavity 631. Not only a length of the channel, but also an average effective width / cross-section is thus controlled proportionally. As shown enlarged in Figure 7, the V-groove or V-grooves rejuvenate from the free, distal end of the needle 622 to more inwards, whereby the effective cross-section of the groove or grooves 623 gradually becomes smaller / smaller in that direction . A proportional fine-tuning of the fluid resistance of the valve is thus possible, varying from the fully closed state shown in Figure 6A to the substantially opened state shown in Figure 6C. In between, the valve can be squeezed proportionally, as in the semi-open situation shown in Figure 6B.
    Although the invention has been further elucidated above with reference to only a few exemplary embodiments, it will be apparent that the invention is by no means limited thereto. On the contrary, many variations and manifestations are still possible for the average person skilled in the art within the scope of the invention.
    权利要求:
    Claims (17)
    [1]
    Conclusions:
    An information for preparing a coffee product, comprising a preparation chamber which is intended and adapted to receive a quantity of ground coffee and to collect it in a coffee bed and provided with pumping means for supplying hot water under increased pressure to the preparation chamber, the preparation chamber is provided with a water inlet for the inlet of water at elevated temperature and pressure on a supply side of the coffee bed, the preparation chamber being provided with an outlet on a discharge side beyond the coffee bed, the outlet being coupled via a product line to an outlet to which the coffee product can be taken off, and wherein the device is provided with an electronic control system which in each case imposes a preparation cycle for the preparation of a product, characterized in that between the outlet of the preparation chamber and the spout from which the coffee product is removable, the product line can be controlled valve device with an on acceptable restriction of which a smallest pass through the control system is proportionally adjustable and controllable.
    [2]
    Device as claimed in claim 1, characterized in that a flow sensor is provided therein for registering a volume flow of the product and delivering it as an electronic value to the control system, wherein the control system controls the restriction depending on the recorded size of the volume flow.
    [3]
    Device as claimed in claim 2, characterized in that the flow meter is included in the product line between the outlet and the outlet.
    [4]
    4. Device as claimed in one or more of the foregoing claims, characterized in that the valve device comprises the smallest passage in a fluid channel between a valve member and a valve housing, wherein a flow resistance of the fluid channel through the control system can be adjusted by an adjustment of the valve member relative to the valve housing.
    [5]
    5. Device as claimed in claim 4, characterized in that the valve-containing adjustable restriction comprises a conical needle which is suitably received in a passage opening of the valve housing, which needle is axially displaceable relative to the passage opening and is thereto coupled to an actuator which is control system is controlled, and in a first extreme position closes the passage opening at least substantially completely and in a second extreme position releases the passage opening at least substantially.
    [6]
    Device as claimed in claim 5, characterized in that the needle axially starts from a screw spindle which is received in an at least substantially complementary screw cavity, wherein the screw spindle is coupled to an output shaft of an electric motor, in particular a stepper motor.
    [7]
    Device as claimed in claim 6, characterized in that an axially adjustable shaft part with adaptive length is provided between the screw spindle and the output motor shaft.
    [8]
    8. Device as claimed in claim 4, characterized in that the valve housing comprises a valve cavity and the valve member a valve body which is closely received therein, that the fluid channel is formed between an inner wall of the receiving cavity and an outer wall of the valve body, and that the valve body is adjustable relative to the receiving cavity.
    [9]
    Device as claimed in claim 8, characterized in that the fluid channel extends in at least one groove in at least one of the inner wall of the valve cavity and the outer wall of the valve body accommodated therein.
    [10]
    Device according to claim 9, characterized in that a length of the channel is adjustable by axial displacement of the valve body to at least partially outside the valve cavity.
    [11]
    Device as claimed in claim 9 or 10, characterized in that the valve body comprises a cylinder body and that the groove in the outer wall thereof runs helically.
    [12]
    Device as claimed in claim 9 or 10, characterized in that the groove extends from one end of the valve body in axial direction over at least a part of a length of the valve body in the outer wall thereof and thereby rejuvenates.
    [13]
    Device as claimed in claim 12, characterized in that the groove is V-shaped both in a lateral section and in a cross section and widens towards the end.
    [14]
    Device as claimed in one or more of the foregoing claims, characterized in that within the preparation cycle the restriction is at least briefly at least substantially fully opened.
    [15]
    Device as claimed in one or more of the foregoing claims, characterized in that the control system imposes a number of predetermined positions during a preparation cycle, each during a certain period of time, on the restriction.
    [16]
    Device as claimed in claim 15, characterized in that the control system comprises an electronic memory in which at least a recipe is recorded that can be retrieved by the control system and which defines the positions and an associated duration within the preparation cycle.
    [17]
    Device according to claim 16, characterized in that the operating system comprises a user interface that enables a user to select a recipe from a number of recipes and to assign it to the operating system.
    421
    424
    424
    423
    424
    422
    622
    631
    622
    622
    622
    622
    622
    Close to Open
    622
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE202006014317U1|2006-09-19|2008-02-07|Wik Far East Ltd.|coffee machine|
    EP2099341B1|2006-12-12|2011-07-06|Jura Elektroapparate Ag|Beverage preparation machine with a pinch valve|
    GB2469873B|2009-05-01|2011-09-07|Kraft Foods R & D Inc|Beverage preparation machines|
    EP3242580B1|2015-01-07|2018-12-19|Koninklijke Philips N.V.|Device and method for preparing a beverage|
    DE102015217997A1|2015-09-18|2017-03-23|Franke Kaffeemaschinen Ag|Brewing device for preparing a hot beverage|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NL2018804A|NL2018804B1|2017-04-28|2017-04-28|Device for preparing a coffee product|US15/965,024| US10959567B2|2017-04-28|2018-04-27|Device for preparing a coffee product|
    JP2018086293A| JP2018187380A|2017-04-28|2018-04-27|Device for preparing coffee product|
    KR1020187022262A| KR20200023158A|2017-04-28|2018-04-30|Coffee product manufacturing equipment|
    PCT/NL2018/050283| WO2018199764A1|2017-04-28|2018-04-30|Device tor preparing a coffee product|
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