Beverage dispensing head and associated beverage dispensing machine

Abstract

This beverage dispensing head (18) includes a receiving chamber (26) for a milk frothing device (28), the beverage dispensing head (18) including a system for retaining the milk frothing device (28) in the receiving chamber (26). According to the invention, the retaining system includes a retaining lever (130) pivotally mounted relative to the receiving chamber (26) and adapted to be moved between an open position allowing access to the receiving chamber (26) and a closed position in which the retaining lever (130) cooperates with the milk frothing device (28) to retain it in the receiving chamber (26). Figure for the abstract: Fig. 3

Description

Title of the invention: Beverage dispensing head and associated beverage dispensing machine technical field

[0001] The present invention relates to the field of beverage dispensing machines, and in particular to automatic coffee machines. More specifically, the present invention relates to the field of beverage dispensing heads designed to accommodate milk frothing devices. Such beverage dispensing heads make it possible, in particular, to prepare coffee-based drinks with milk foam. State of the art

[0002] Document DE102008042276 B4 discloses a beverage dispensing head comprising a hot water / steam outlet and a housing for a milk frothing device equipped with a hot water / steam inlet port suitable for connection to the hot water / steam outlet. In DE 102008042276 B4, the dispensing head includes a sliding door for opening / closing the receiving housing. The door allows the receiving housing to be closed or accessed for connecting or accessing the milk frothing device.

[0003] However, the beverage dispensing head according to DE102008042276 B4 does not ensure optimal positioning and retention of the milk frothing device in the receiving compartment. Therefore, there is a risk of misuse of the frothing device, and the safety of its operation needs improvement. Summary of the invention

[0004] The present invention aims to remedy these drawbacks.

[0005] The technical problem underlying the invention consists of proposing a beverage distribution head suitable for receiving a milk foaming device and enabling optimized safety and foaming performance.

[0006] To this end, the invention relates to a beverage dispensing head comprising a hot water / steam dispensing outlet and a housing for a milk frothing device having a hot water / steam inlet orifice adapted to be fluidly connected to the hot water / steam dispensing outlet. The beverage dispensing head includes a system for retaining the milk frothing device in the receiving housing. According to the invention, the retaining system comprises a retaining lever pivotally mounted relative to the receiving housing and suitable to be moved between an open position for access to the receiving housing and a closed position in which the retaining lever is suitable to cooperate with the milk frothing device to hold it in the receiving housing.

[0007] Thanks to the invention, the retention and positioning of the milk frothing device are improved because the retaining lever ensures optimized positioning and retention of the milk frothing device for enhanced performance and safety. Furthermore, the retaining lever is easy to operate and allows the user to easily: - access the milk frothing device to disconnect and clean it, and / or - maintain the milk frothing device in the receiving housing in a position that guarantees optimal frothing performance and avoids any risk of unwanted disconnection of the hot water / steam inlet orifice from the hot water / steam distribution outlet, which could pose a risk to the user.

[0008] According to advantageous but not mandatory aspects of the invention, such a beverage dispensing head may incorporate one or more of the following features, taken in any technically permissible combination.

[0009] According to an advantageous feature of the invention, the retaining lever is pivotally mounted about a longitudinal axis of the beverage dispensing head, the open position corresponding to a high position and the closed position to a low position.

[0010] Such an arrangement simplifies the handling of the retaining lever and therefore the operations of inserting the milk foaming device into the receiving housing and removing the milk foaming device from the receiving housing.

[0011] According to an advantageous feature of the invention, the retaining lever comprises at least one axial projection suitable for bearing against the milk foaming device, preferably two axial projections suitable for bearing against the milk foaming device, when moving the retaining lever from the open position to the closed position while the milk foaming device is positioned in the receiving housing.

[0012] Such an arrangement makes it easier to fix the milk foaming device in the beverage distribution head and to ensure proper positioning of the milk foaming device in said beverage distribution head.

[0013] According to an advantageous feature of the invention, each axial projection is designed, when the milk frothing device is incorrectly positioned in the receiving housing, to cooperate with a corresponding anti-misalignment element positioned on the milk frothing device to prevent the movement of the retaining lever in the closed position.

[0014] Such an arrangement makes it possible to guarantee the correct positioning of the device The milk frothing device is placed in the receiving compartment and alerts the user to any incorrect positioning of the milk frothing device, preventing the production of a milk-based beverage when the device is improperly positioned. This improves the operational reliability of the milk frothing device.

[0015] According to an advantageous feature of the invention, each axial projection is suitable, when the milk foaming device is correctly positioned in the receiving housing, for applying an axial force on a corresponding lug positioned on the milk foaming device, when moving the retaining lever into the closed position, to ensure the correct position and retention of the milk foaming device in the receiving housing.

[0016] Such an arrangement makes it possible to ensure the maintenance and correct positioning of the milk foaming device in the receiving housing via a simple movement of the retaining lever.

[0017] According to an advantageous feature of the invention, the retaining lever comprises two axial projections positioned on either side of a central axis of the distribution head.

[0018] Such an arrangement makes it possible to optimize the manipulation of the retaining lever and the interaction of the axial projections with the milk foaming device.

[0019] According to an advantageous feature of the invention, each axial projection extends in a substantially vertical plane when the retaining lever is in the closed position and is attached to an upper wall of the retaining lever.

[0020] Such an arrangement simplifies the interaction between the axial projections and the milk foaming device.

[0021] According to an advantageous feature of the invention, the retaining lever comprises a front face provided with a gripping area by a user to manipulate the retaining lever between its open and closed positions.

[0022] Such an arrangement makes it easier to manipulate the holding lever.

[0023] According to an advantageous feature of the invention, the receiving housing includes at least one milk foaming device guide element adapted to cooperate with a corresponding guide element located on the foaming device.

[0024] Such an arrangement makes it easier to insert and position the milk foaming device in the beverage distribution head.

[0025] According to an advantageous feature of the invention, each guide element of the receiving housing is adapted to keep a closing part of the milk foaming device in contact with a mixing element of the foaming device when the milk foaming device is inserted into the receiving housing.

[0026] Such an arrangement makes it possible to ensure the closure and maintenance in position of The closure, i.e., the contact with the mixing element, of the closing portion when the milk frothing device is integrated into the beverage dispensing head. Advantageously, each guide element of the milk frothing device is designed to cooperate with its corresponding guide element located in the beverage dispensing head, to ensure the closure and retention in the closed position of the closing portion when the milk frothing device is inserted into the receiving housing.

[0027] According to an advantageous feature of the invention, the beverage dispensing head comprises a top face provided with an opening for the passage of an air flow control element in the milk frothing device.

[0028] Such an arrangement makes it easier to integrate the milk foaming device into the receiving housing and to allow the user access to the air flow control element in the milk foaming device.

[0029] According to an advantageous feature of the invention, the beverage dispensing head includes an upper wall provided with a viewing area for a mixing portion of the milk foaming device.

[0030] Such an arrangement allows the user to view the milk frothing device through the viewing area and thus verify its correct positioning and proper functioning. Furthermore, by observing the milk frothing device, the user can determine if it has already been used and if cleaning is necessary.

[0031] According to an advantageous feature of the invention, the beverage dispensing head comprises a rear area receiving a beverage dispensing element and a front area defining the receiving housing for the milk frothing device.

[0032] Such an arrangement makes it possible to improve the compactness of the beverage distribution head while integrating the milk frothing device.

[0033] Advantageously the retaining lever includes a solid front face suitable for covering the receiving housing and in particular a front face of the milk foaming device when it is received in the receiving housing.

[0034] Advantageously, the milk frothing device is removable from the receiving housing between an assembled position in which it is received in the housing and the hot water / steam inlet orifice is fluidly connected to the hot water / steam distribution outlet and a disassembled position in which it is separated from the receiving housing and the hot water / steam inlet orifice is no longer fluidly connected to the hot water / steam distribution outlet.

[0035] The invention also relates to a beverage dispensing machine comprising a beverage dispensing head. According to the invention, the beverage dispensing head is as described above. Brief description of the figures

[0036] The objects, aspects and advantages of the present invention will be better understood from the following description of a particular embodiment of the invention presented by way of non-limiting example, by reference to the accompanying drawings in which:

[0037] Figure 1 is a front view of a beverage dispensing machine comprising a beverage dispensing head receiving a milk frothing device according to a first embodiment of the invention.

[0038] Figure 2 is a perspective view of the beverage dispensing head of the [Fig.l] on which a support / holding device associated with the beverage dispensing head is in the closed position;

[0039] Figure 3 is a perspective view of the beverage dispensing head of the [Fig.l] on which a support / holding device associated with the beverage dispensing head is in the open position;

[0040] Figure 4 is a view analogous to Figure 3 on which a guiding element of the milk frothing device in the beverage dispensing head is omitted;

[0041] Figure 5 is a side view in section along the vertical cutting plane along the line VV of the beverage dispensing head of [Fig.2];

[0042] Figure 6 is a perspective view of the milk frothing device shown in Figures 1 to 2. 5 comprising a closing part in the closed position;

[0043] Figure 7 is a view analogous to Figure 6, in which the closing part is in opening position;

[0044] Fig. 8 is an exploded view of the foaming device of Fig. 7;

[0045] Figure 9 is a perspective view of a foaming device according to a second embodiment of the invention in which a closing part is in the closed position;

[0046] Fig. 10 is a perspective view of the foaming device of Fig. 9 in in which the closing part is in the open position.

[0047] Only the elements necessary for understanding the invention have been shown. To facilitate reading the drawings, the same elements bear the same reference numerals from one figure to another. Detailed description of the invention

[0048] In the following description, foam or foaming means obtaining foam from a liquid, whether it is only foam from that liquid (i.e., milk foam) or a mixture of that liquid and foam from that liquid (i.e., a mixture of milk and milk foam).

[0049] It should be noted that in this document, the terms "horizontal", "vertical", "lower", "Superior", "top", "bottom", "front", "back", "longitudinal", "transverse", used to describe the beverage dispensing machine and its associated components refer to the beverage dispensing machine and associated components in a situation of use, when the machine is lying flat on a work surface.

[0050] Furthermore, the terms "upstream" and "downstream" or "inlet" and "outlet" are defined according to a direction of flow of the beverage or steam in the beverage distribution machine and in the milk frothing device.

[0051] The terms "external" and "internal," as well as the terms "outside" and "inside," are defined with respect to a central axis of the beverage dispensing machine or milk frothing device. Thus, an internal portion / part will be closer to the central axis than an external portion / part.

[0052] The beverage dispensing machine shown in [Fig.1] is a coffee machine 10. Alternatively, the beverage dispensing machine is a hot water or tea dispensing machine.

[0053] The coffee machine 10 is advantageously an automatic coffee machine.

[0054] The coffee machine 10 comprises a frame 12 and a receiving area 16 for a container or container on which a container / receptacle, not shown, is suitable to be placed.

[0055] The coffee machine 10 also includes a beverage dispensing head 18.

[0056] The coffee machine 10 advantageously includes a human-machine interface, not visible in the figures, through which a user can select a type of beverage to be dispensed and advantageously enter settings for the coffee machine 10.

[0057] The coffee machine 10 also includes a beverage preparation unit, not shown, integrated into the frame 12.

[0058] The preparation unit includes a control circuit for managing the preparation of a beverage according to instructions given by the user. The preparation unit also includes a boiler producing hot water and / or steam and a reservoir forming a cold water reserve. The reservoir supplies the boiler to produce hot water and / or steam.

[0059] The brewing unit also advantageously comprises, in a known but not shown manner, a coffee bean hopper, an automatic bean grinder, and a brewing chamber suitable for receiving the ground coffee beans and being supplied with hot water by the boiler. The brewing chamber is fluidly connected to the beverage dispensing head 18, so that the coffee machine 10 is suitable for dispensing a coffee-based beverage via the beverage dispensing head 18.

[0060] The coffee machine 10 also includes a hot water / steam outlet nozzle, not visible in the figures, suitable for being supplied with hot water and / or steam by the boiler. The hot water / steam outlet nozzle opens near the beverage dispensing head 18 to supply it with hot water / steam.

[0061] In the embodiment of Figures 1 to 5, the beverage dispensing head 18 includes a hot water / steam dispensing outlet 20, visible in [Fig.5], fluidly connected to the hot water / steam outlet nozzle.

[0062] The hot water / steam outlet nozzle is for example formed by a tube suitable for being connected to the hot water / steam distribution outlet 20.

[0063] The beverage distribution head 18 also includes a beverage distribution element 22 adapted to be fluidly connected to the infusion chamber and to distribute the coffee-based beverage.

[0064] The beverage distribution unit 22 advantageously comprises two beverage distribution outlets, only one of which 36 is visible in [Fig.5], so that it is suitable for delivering the coffee-based beverage into two cups simultaneously.

[0065] As seen in [Fig.5], the beverage distribution head 18 includes a zone 24, preferably rear, receiving the beverage distribution member 22 and a zone, preferably front, defining a housing 26 for receiving a milk foaming device 28.

[0066] The beverage dispensing head 18 is advantageously height-adjustable.

[0067] The beverage dispensing head 18 also includes a power inlet 29 in milk from the foaming device 28.

[0068] Advantageously, and as shown in [Fig.3], the supply inlet 29 opens onto a lateral side of the beverage distribution head 18. The supply inlet 29 is suitable for receiving a milk supply tube fluidly connected to a milk container preferably located away from the coffee machine 10.

[0069] As seen in figures 2 to 4, the beverage distribution head 18 comprises a main body 30 defining the housing 26 for receiving the foaming device 28 and the receiving area 24 for the beverage distribution member 22.

[0070] The main body 30 includes an open front end 32 providing access to the receiving housing 26.

[0071] The beverage dispensing head 18 also includes a closing body 34 of the front end 32.

[0072] In the embodiment shown, the closure body 34 is pivotally mounted on the main body 30. The closure body 34 is able to be moved between an open position providing access to the receiving housing 26 of the foaming device 28 and a closed position in which it at least partially closes the receiving housing 26, in particular the front end 32 of the main body 30.

[0073] The locking body 34 is rotationally articulated on the main body 30 according to a longitudinal axis X substantially horizontal. The articulation is for example located between an upper wall 38 of the main body 30 and an upper wall 40 of the closing body 34.

[0074] In the example of figures 1 to 8, the foaming device 28 is removable from the beverage dispensing head 18 and in particular from the receiving housing 26. In other words, the foaming device is suitable for integration into the beverage dispensing head 18.

[0075] As seen in [Fig.7], the foaming device 28 comprises a mixing element 42 including a mixing part 44, a hot water / steam inlet orifice 46 and a main flow conduit 48 connecting the hot water / steam inlet orifice 46 to the mixing part 44.

[0076] The foaming device 28 and in particular the mixing element 42 also includes a connection member 50 of the foaming device to the hot water / steam distribution outlet 20.

[0077] The connecting member 50 opens onto a rear face 52 of the foaming device 28 and in particular of the mixing element 42.

[0078] When positioning the foaming device 28 in the receiving housing 26, the connecting member 50 is suitable for being connected to the hot water / steam distribution outlet 20 so as to be supplied with hot water / steam.

[0079] The hot water / steam inlet port 46 is fluidly connected to the connecting member 50 so as to receive hot water / steam delivered by the hot water / steam distribution outlet 20 when the connecting member 50 is connected to the hot water / steam distribution outlet 20.

[0080] Alternatively, the hot water / steam inlet port 46 is suitable for being connected directly to the hot water / steam distribution outlet 20 when the foaming device 28 is positioned in the receiving housing 26.

[0081] Generally, the hot water / steam inlet 46 is suitable for being fluidly connected to the hot water / steam distribution outlet 20 when the foaming device 28 is received in the beverage dispensing head 18. This connection is reversible because the connecting member 50 is suitable for being connected / disconnected from the hot water / steam distribution outlet 20.

[0082] The mixing element 42 comprises an upper wall 54.

[0083] The foaming device 28 and in particular the mixing element 42 comprise two side walls 56, 58.

[0084] The side walls 56, 58 each define a gripping zone 56A, 58A of the foaming device 28 by a user. A user of the foaming device 28 is able to manipulate the foaming device 28 and position it in the receiving compartment 26 by manipulating it with their fingers at the gripping zones. grip 56A, 5 8A.

[0085] The side walls 56, 58 are each provided with a lug 62, 64 for retaining / positioning the foaming device 28 in the beverage distribution head 18.

[0086] The lugs 62, 64 are adapted to cooperate with the closure body 34 which forms a device for retaining the foaming device 28 in the beverage distribution head 18 as will be explained later in the detailed description of the closure body 34 and its interaction with the foaming device 28.

[0087] The side walls 56, 58 are also each provided with a guide element 66, 68 suitable for cooperating with a corresponding guide element 70, 72 located in the beverage distribution head 18.

[0088] The guiding elements 66, 68 are for example formed by ribs arranged at the level of the side walls 56, 58.

[0089] The guide elements 70, 72 are for example grooves designed to receive the ribs corresponding to the guide elements 66, 68 and form a sliding connection with said ribs.

[0090] The guide elements 70, 72 are arranged in an upper part of the receiving housing 26.

[0091] The guide elements 66, 68 are for example located in front of the gripping areas following an insertion direction of the foaming device 28 into the beverage distribution head 18.

[0092] Advantageously and as shown in the figures, the guide elements 66, 68 are formed by a portion of the corresponding side wall 56, 58 forming the rib.

[0093] The lugs 62, 64 are advantageously projecting along the longitudinal axis X relative to the guide elements 66, 68 and more generally relative to the other elements forming the side walls 56, 58. In other words, they extend outwards from the foaming device 28 beyond the guide elements 66, 68 along the longitudinal axis X.

[0094] As can be seen from Figures 5 and 7, the mixing part 44 includes a liquid inlet opening 74, a liquid outlet opening 76 and a mixing chamber 78 extending between the liquid inlet opening 74 and the liquid outlet opening 76.

[0095] The mixing chamber 78 extends along a vertical axis Z.

[0096] The mixing chamber 78 includes an open upper end 80. The open upper end 80 forms an access opening to the mixing chamber 78.

[0097] The mixing chamber 78 opens into an upper face of the upper wall 54 of the mixing element 42.

[0098] The mixing chamber 78 has a substantially circular cross-section perpendicular to the vertical axis Z.

[0099] The liquid inlet opening 74 opens into an upper part of the mixing chamber 78, and for example into a high point of the mixing chamber 78 and the liquid outlet opening 76 is located in a lower part of the mixing chamber 78, and is for example located in a low point of the mixing chamber 78.

[0100] The open upper end 80 is disposed on an upper face of the mixing element 42 and therefore of the upper wall 54.

[0101] The liquid outlet opening 76 is arranged on a lower face of the mixing element 42.

[0102] The main flow channel 48 is provided in the upper face of the upper wall 54 and opens into the mixing chamber 78 at the level of the liquid inlet opening 74.

[0103] The main flow conduit 48 opens substantially tangentially into the mixing chamber 78, so that the mixing chamber 78 is of the cyclonic type. Thus, the liquid entering the mixing chamber 78 from the main flow conduit 48 passes through the mixing chamber by swirling along the walls of the mixing chamber 78.

[0104] As shown in [Fig. 7], the main flow conduit 48 has a cross-sectional restriction 84 located, for example, in a central portion of the main flow conduit 48. The main flow conduit 48 includes, in particular, a first conduit portion 48.1 located upstream of the cross-sectional restriction 84 and extending to the cross-sectional restriction, and a second conduit portion 48.2 located downstream of the cross-sectional restriction 84 and extending from the cross-sectional restriction 84 to the mixing chamber 78. Advantageously, the first conduit portion 48.1 has a cross-sectional area that decreases towards the cross-sectional restriction 84, and the second conduit portion 48.2 has a cross-sectional area that increases towards the mixing chamber 78.

[0105] The hot water / steam inlet port 46 opens into the first portion of the conduit 48.1 and more particularly opposite the mixing chamber 78. The main flow conduit 48 is thus configured to fluidly connect the hot water / steam inlet port 46 to the mixing chamber 78, and to allow hot water / steam to flow in the main flow conduit 48 and to the mixing chamber 78.

[0106] The foaming device 28 includes a milk supply conduit 90 connected to the main flow conduit 48. The milk supply conduit 90 extends between the main flow conduit 48 and milk feed inlet 29 when the foaming device 28 is positioned in the receiving housing 26.

[0107] The milk supply conduit 90 is suitable for being fluidly connected to a remote milk reservoir separate from the milk foaming device 28.

[0108] The milk supply conduit 90 is fluidly connected to the main flow conduit 48, and thus configured to be fluidly connected to the mixing chamber 78 via the main flow conduit 48. According to the embodiment shown in the figures, the mixing element 42 comprises the milk supply conduit 90, and more particularly the mixing element and the milk supply conduit 90 are made in one piece.

[0109] The milk supply conduit 90 includes a substantially vertical portion which extends, preferably from the vicinity of a lower face of the mixing element 42, and opens into the main flow conduit 48 at the section restriction 84. A lower end of the vertical portion is adapted to be fluidly connected to the milk supply inlet 29 when the foaming device 28 is positioned in the receiving housing 26.

[0110] In the figures only the part of the milk supply conduit 90 which opens into the main flow conduit 48 is visible.

[0111] The foaming device 28 also includes an air inlet channel 92 in the main flow duct 48. According to the embodiment shown, the mixing element 42 includes the air inlet channel 92.

[0112] Advantageously, the air intake channel 92 is provided in the upper face of the upper wall 54 of the mixing element 42.

[0113] The air intake channel 92 opens into the main flow duct 48 at the section restriction 84. The air intake channel 92 is thus configured to be fluidly connected to the mixing chamber 78 via the main flow duct 48.

[0114] The section restriction 84, described previously, induces an increase in the velocity of the vapor flowing in the main flow duct 48, which generates a depression in the milk supply duct 90 and in the air intake channel 92. The section restriction 84 is therefore more particularly configured to form a milk and air suction system based on the venturi effect. The main flow duct 48 is thus configured such that a flow of hot water / steam in the main flow duct 48 from the hot water / steam inlet port 46 to the mixing chamber 78 generates a vacuum in the milk supply duct 90 and a vacuum in the air intake channel 92, and consequently results in the suction of milk and air into the main flow duct 48 and the flow of the suctioned milk and air to the mixing chamber 78.

[0115] In addition, the second portion of the conduit 48.2, which has a passage cross-section that increases towards the mixing chamber 78, promotes a first mixing of the steam, milk and air coming respectively from the hot water / steam inlet orifice 46, the milk supply conduit 90 and the air intake channel 92, before their arrival in the mixing chamber 78.

[0116] Furthermore, due to the positioning of the main flow duct 48 relative to the mixing chamber 78, the initial mixture of steam, milk, and air undergoes cyclonic motion upon entering the mixing chamber and swirls along the walls of the mixing chamber 78, further enhancing mixing and the production of milk foam with optimal consistency. Thus, the mixing chamber 78 homogenizes the aforementioned initial mixture and completes the mixing process that began in the second portion of the duct 48.2.

[0117] The main flow conduit 48, as well as the hot water / steam inlet 46, the air intake channel 92, and the mixing chamber 78, advantageously comprise an open upper end. In other words, they form liquid circulation channels that are open to the outside in their upper part.

[0118] The foaming device 28 includes a closing part 96 movable relative to the mixing element 42 between a closed position in which the closing part 96 closes the mixing part 44 and the main flow conduit 48 and an open position in which the mixing part 44 and the main flow conduit 48 are open and accessible to allow cleaning of the mixing part 44 and the main flow conduit 48.

[0119] In the closed position, the closing part 96 closes, in particular, the open upper end of the hot water / steam inlet 46, the main flow conduit 48 and the mixing chamber 78.

[0120] Advantageously, in the closed position, the closing part 96 also at least partially closes the air intake channel 92 and in particular the open upper end of the air intake channel.

[0121] Advantageously, the main flow conduit 48 extends along a substantially horizontal plane and includes over at least 50% of its length, preferably over at least 70% of its length, a top opening also called the open top end, suitable for being closed when the closing part 96 is in the closed position.

[0122] The closing portion 96 is configured to cover the upper face of the upper wall 54 of the mixing element 42. The closing portion 96 forms a substantially flat cover suitable for covering the upper face of the upper wall 54 and in particular the mixing portion 44 and the main flow conduit 48.

[0123] The closing portion 96 is configured to be articulated with the mixing element 42 via a hinge defining a substantially horizontal axis of rotation Y. The axis of rotation Y is advantageously perpendicular to the longitudinal axis X when the foaming device is positioned in the receiving housing 26. In an alternative not shown, the axis of rotation Y is parallel to the longitudinal axis X.

[0124] The hinge simplifies handling of the foaming device by ensuring that the closing part 96 remains attached to the mixing element 42 regardless of the position of the closing part. Furthermore, the hinge allows the closing part to be easily moved to the open or closed position depending on whether the user wishes to clean or use the foaming device.

[0125] Advantageously, the side walls 56, 58 of the foaming device, comprising side walls of the closing part 96 and the side walls of the mixing element 42, form, when the closing part 96 is in the closed position, the guide elements 66, 68. Such an arrangement makes it possible to ensure the closure of the foaming device 28, i.e. of the closing part 96, when the foaming device 28 is inserted into the receiving housing 26 and the interaction of the guide elements 66, 68 with the corresponding guide elements 70, 72.Furthermore, such an arrangement ensures that the closing part 96 remains in the closed position when the foaming device 28 is received in the receiving housing 26, since the guide elements 70, 72 extend on either side of the corresponding guide elements 66, 68 in a substantially vertical direction and ensure that the side walls of the closing part 96 remain in contact / adjacent with the side walls of the mixing element 42.

[0126] In other words, each guide element 70, 72 is suitable for maintaining the closing part 96 of the foaming device in the closed position, i.e. in contact with the mixing element 42 when the foaming device 28 is inserted into the receiving housing 26.

[0127] In an alternative not shown, the foaming device 28 includes a retaining system not shown configured to hold the closing part 96 in the closed position. The retaining system is, for example, formed by a locking member such as a locking clip integral with the closing part and adapted to be held by form cooperation in a corresponding groove formed on the mixing element 42, and in particular its upper wall / face 54, when the closing part is in the closed position. The retaining system is adapted to be moved between a locked position of the closing part 96 in the closed position and an unlocked position.

[0128] The closing part 96 includes a viewing window 97, visible on the [Fig.6], intended to be opposite the mixing part 44 and in particular the mixing chamber 78 when the closing part 96 is in the closed position.

[0129] The viewing window 97 is intended to be opposite the open upper end 80 when the closing part 96 is in the closed position.

[0130] The viewing window 97 is for example formed by a portion of the closing part made of a transparent material so that the user can view the inside of the mixing chamber 78 when the closing part 96 is in the closed position.

[0131] The viewing window 97 allows the user to see whether the foaming device 28 has already been used and whether it needs to be cleaned before preparing a beverage. The user can observe the inside of the mixing chamber 78 through this window. Furthermore, the user can verify the proper functioning of the foaming device 28 through the viewing window by visually checking whether the milk passes through the mixing chamber 78 and moves in a cyclonic fashion along the walls of the chamber 78.

[0132] The closing part 96 also includes an air supply duct 98, visible in [Fig. 7], adapted to be fluidly connected to the main flow duct 48 when the closing part 96 is in the closed position, and an air flow control device 99 configured to regulate the air flow rate through the air supply duct 98 to the main flow duct 48. The air supply duct 98 is advantageously connected to the air intake channel 92 when the closing part 96 is in the closed position so as to be fluidly connected to the main flow duct 48.

[0133] The air supply duct 98 is for example an orifice passing through the closing part 96 along the vertical axis Z when the closing part 96 is in the closed position.

[0134] According to the embodiment shown in the figures, and as more clearly seen in [Fig.5], the air flow control device 99 comprises a support part 100 fixed to the closure part 96 and projecting from an upper face of the closure part 96. The air flow control device 99 also comprises an air flow control member 102, such as a flow control knob, supported by the support part 100 and mounted to move, and for example mounted to move helically, relative to the support part 100 in a direction of movement D2 which may for example be substantially vertical.

[0135] The flow control member 102 is configured to occupy a plurality of adjustment positions offset from each other along the direction of movement D2.

[0136] The air flow control device 99 further includes a sealing element 104 which is fixed to the flow control member 102 and which is configured to delimit with the support part 100 an air flow passage having a passage cross-section which varies according to the position occupied by the flow control element 102.

[0137] The flow control element 102 is more particularly movable between a maximum adjustment position in which the passage area of ​​the air flow passage is maximum, and a minimum adjustment position in which the passage area of ​​the air flow passage is minimum, and for example zero or substantially zero.

[0138] According to the embodiment shown in the figures, the support portion 100 has an insertion hole 106, which may, for example, have a diameter greater than one millimeter and preferably greater than 1.5 millimeters, oriented substantially parallel to the direction of movement D2, and the air flow control device 99 has a flow restrictor element not visible in the figures, such as a pin or a needle of generally cylindrical shape, having a lower end portion that is housed in the insertion hole 106. The flow restrictor element is fixed in movement to the flow control element 102, and is therefore movably mounted in the insertion hole 106 along the direction of movement D2. The insertion hole 106 and the flow restrictor element more specifically define a calibrated air passage fluidly connected to the air supply duct 98.

[0139] The air flow control device 99 allows the flow rate of air injected into the main flow duct 48 to be adjusted, and therefore the size of the air bubbles contained in the milk foam at the outlet of the foaming device 28. By changing the size of the air bubbles, the volume of milk foam is changed.

[0140] According to one embodiment of the invention, the mixing element 42 could be devoid of the air intake channel 92, and the air supply duct 98 could be connected directly to the main flow duct 48 when the closing part 96 is in the closed position.

[0141] The milk foaming device 28 includes a sealing gasket 110, visible in [Fig.7], arranged at a junction area between the mixing element 42 and the closing part 96. The sealing gasket 110 extends over the periphery of the mixing part 44 and the main flow conduit 48.

[0142] The closing part 96 is designed to provide support on the sealing gasket 110 when the closing part 96 is in the closed position.

[0143] As shown more particularly in [Fig. 7], the sealing gasket 110 extends around the mixing chamber 78 and, in particular, around the open upper end 80, the main flow channel 48, the air intake channel 92, and the hot water / steam inlet 46. For this purpose, the mixing element 42 has a receiving groove 112 formed in the upper face of the upper wall 54 in which is housed the sealing gasket 110.

[0144] According to the embodiment shown in the figures, the sealing gasket 110 comprises a gasket body housed entirely in the receiving groove 112, and a sealing lip extending along the gasket body and projecting out of the receiving groove 112. Advantageously, the sealing gasket 110 is continuous and can, for example, have a constant cross-section.

[0145] The closing part 96 together with the sealing gasket 110 ensures a seal at the upper wall 54, the main flow conduit 48, as well as the hot water / steam inlet orifice 46, the air intake channel 92 and the mixing chamber 78. Optimized performance of the foaming device 28 is thus guaranteed.

[0146] The milk frothing device 28 also includes a frothed milk distribution element 114 suitable for being reversibly connected to the mixing element 42 as is more clearly seen in [Fig.8].

[0147] The frothed milk distribution element 114 advantageously comprises an inlet channel 116 and two outlet channels 118, 120 of frothed milk.

[0148] The frothed milk distribution element 114 and in particular the inlet channel 116 is suitable to be fluidly connected to the liquid outlet opening 76 when connected to the mixing element 42.

[0149] The frothed milk distribution element 114 is adapted to deliver frothed milk into two cups simultaneously via the two outlet channels 118, 120.

[0150] In the embodiment shown, the closing body 34 forms a device for retaining the foaming device 28 in the receiving housing 26.

[0151] The retaining device takes the form of a retaining lever 130 movable between the open position for access to the receiving housing and the closed position in which the retaining lever 130 is suitable for cooperating with the milk foaming device 28 to retain it in the receiving housing 26.

[0152] When the retaining lever 130 is in the open position, a user can access the receiving housing 26 and in particular the foaming device 28 to remove it from the receiving housing 26 and, for example, carry out a cleaning operation on the foaming device.

[0153] When the retaining lever 130 is in the closed position and the foaming device 28 is received in the receiving housing 26, the retaining lever 130 is able to cooperate with the milk foaming device 28 to hold it in the receiving housing 26.

[0154] The retaining lever 130 is mounted pivotally relative to the receiving housing along the longitudinal axis X.

[0155] As can be seen in the figures, the open position of the retaining lever 130 corresponds to a high position and the closed position to a low position.

[0156] The retaining lever 130 includes in particular axial projections 132, 134 designed to bear against the foaming device 28, when the retaining lever 130 is moved from the open position to the closed position while the foaming device 28 is positioned in the receiving housing 26.

[0157] The axial projections 132, 134 extend from an inferior face of the upper wall 40.

[0158] The axial projections 132, 134 extend in a substantially vertical plane.

[0159] Each axial projection 132, 134 is designed, when the foaming device 28 is incorrectly positioned in the receiving housing 26, to cooperate with a corresponding lug 62, 64 to prevent the retaining lever from moving in the closed position. The lugs 62, 64 form keying elements that ensure correct positioning of the foaming device 28 in the receiving housing 26.

[0160] Advantageously, each axial projection 132, 134 includes a relief, for example in the form of a hook, suitable for cooperating with the corresponding lug 62, 64.

[0161] Indeed, if the foaming device 28 is incorrectly positioned, and in particular not fully inserted into the receiving housing 26 along the insertion direction, the lugs are designed to cooperate with the axial projections and advantageously the raised areas, so as to prevent the retaining lever 130 from moving in the closed position. Thus, the user realizes that the foaming device 28 is not fully inserted into the receiving housing 26 and can correct its positioning.

[0162] Advantageously, each axial projection 132, 134, and advantageously again each relief, is adapted to cooperate with the corresponding lug 62, 64 when the foaming device 28 is correctly positioned in the receiving housing 26 and the retaining lever 130 is moved to the closed position. More precisely, each relief is adapted to apply an axial force to the corresponding lug 62, 64 when the foaming device 28 is correctly positioned in the receiving housing 26 and the retaining lever 130 is moved to the closed position.

[0163] The axial force is exerted along the insertion direction of the foaming device 28 in the receiving housing 26 in order to ensure the correct positioning of the foaming device 28 in the beverage distribution head 18 and to ensure the connection of the connecting member 50 to the hot water / steam distribution outlet 20.

[0164] The axial projections 132, 134 ensure via the axial force that the connecting member 50 cooperates with the hot water / steam distribution outlet 20 and that the milk supply conduit 90 is connected to the milk supply inlet 29 so that the proper functioning of the foaming device 28 is ensured.

[0165] The axial projections 132, 134 are arranged on either side of a central axis of the Beverage dispensing head 18. The central axis is a vertical axis.

[0166] Alternatively, the retaining lever 130 comprises a single axial projection.

[0167] The retaining lever 130 also includes a front face provided with a gripping area 135 by the user to manipulate the retaining lever 130 between its open and closed positions.

[0168] Advantageously, the beverage dispensing head 18 comprises an upper face provided with a passage orifice 136 for the air flow control member 102. Advantageously the passage orifice 136 is formed through the upper wall 38 of the main body 30.

[0169] Advantageously, the beverage dispensing head 18 comprises an upper face, such as the upper wall 40, provided with a viewing area 138 of a mixing portion 44 of the foaming device 28. The viewing area 138 is, for example, formed by an opening provided through the upper wall 40 of the closure body 34. Alternatively, the viewing area 138 is a transparent area provided in the upper wall 40.

[0170] The viewing area 138 is arranged to be opposite the viewing window 97 when the retaining lever 130 and / or the locking body 34 is in the closed position and the foaming device 28 is received in the receiving housing 26. The viewing area 138 allows the mixing chamber 78 to be viewed through the viewing window 97. Thus, the user can observe the mixing chamber 78 and the foamed milk flowing through the foaming chamber. This allows the user to visually check whether the foaming device 28 needs cleaning, as well as the proper functioning of the foaming device 28 by checking the cyclonic movement of the milk and, advantageously, the texture of the milk.

[0171] The closing body 34 also forms a support device on the closing part 96 of the foaming device 28.

[0172] The support device is suitable when the foaming device 28 is positioned in the receiving housing 26, to exert a bearing force on the closing part 96 to ensure a seal between the mixing element 42 and the closing part 96.

[0173] The support device also maintains a constant distance between the closing portion 96 and the upper wall 54 when the closing portion 96 is in the closed position. Thus, the dimensions of the main flow duct 48, as well as the air intake channel 92 when using the foaming device 28, are maintained over time, and foaming performance is optimized and guaranteed over time. The support device ensures proper contact between the closing portion 96 and the mixing element 42, to maintain the dimensions of the conduit 48 and channel 92 and avoid possible deformation of the closing part 96.

[0174] The support device is formed by the retaining lever 130 mounted pivotally relative to the receiving housing 26 and adapted to be moved between the open position for access to the receiving housing 26 and the closed position in which the support device exerts the bearing force on the closing part 96 to ensure that the closing part 96 is pressed against the mixing element 42. The retaining lever 130 is in particular adapted to press the closing part 96 against the sealing gasket 110.

[0175] The support force extends in particular in a substantially vertical direction.

[0176] The retaining lever 130 includes in particular an upper rib 140, preferably two 140, 142, arranged on the lower face of the upper wall 40.

[0177] The ribs 140, 142 extend from an inferior face of the upper wall 40.

[0178] The ribs 140, 142 are adapted to bear against the foaming device 28, when moving the retaining lever 130 from the open position to the closed position while the foaming device 28 is positioned in the receiving housing 26.

[0179] The ribs 140, 142 are designed to exert the bearing force on the closing part 96 so as to guarantee a good seal between the mixing element 42 and the closing part 96.

[0180] Advantageously, the retaining lever also includes two additional ribs 144, 146, also called front ribs, positioned on an inner wall of a front face of the lever 130. The additional ribs 144, 146 extend preferentially along the longitudinal axis X. The additional ribs 144, 146 are adapted to bear against the foamed milk distribution element 114, when the retaining lever 130 is moved from the open position to the closed position while the foaming device 28 is positioned in the receiving housing 26. Such a configuration is particularly advantageous in the embodiment of Figures 9 and 10, as will be explained later.

[0181] Alternatively, the closing body is a front cover for the beverage dispensing head designed to close the receiving compartment 26, specifically the front end 32 of the main body 30. In this variant, the beverage dispensing head 18 includes a retaining lever 130 articulated on the main body 30 and separate from the closing body. The retaining lever 130 is movable between the open position, allowing access to the receiving compartment, and the closed position, in which it partially closes the receiving compartment. In this variant, the retaining lever is positioned between the main body 30 and the closing body and has characteristics generally similar to the embodiment shown in the figures, except that it does not serve as a cover for the beverage dispensing head 18.

[0182] In the following, the second embodiment of the invention will be described with reference to Figures 9 and 10. Only the elements that differ between the first and second embodiments will be described, the similar elements not being described again and bearing identical references to the first embodiment.

[0183] Figures 9 and 10 show a foaming device 228 according to the second embodiment of the invention.

[0184] The foaming device 228 includes a first body 230 forming a mixing element 232 overall similar to the first embodiment and comprising the hot water / steam inlet orifice 46, the main flow conduit 48, the milk supply conduit 90 and the air intake channel 92.

[0185] The mixing element 232 differs from the mixing element 42 in that it forms a partial contour of the mixing chamber 78 and not the entirety of the mixing chamber 78.

[0186] The foaming device 228 also includes a second body 234 movable relative to the first body 230. The second body 234 is hinged relative to the first body 230 via a hinge defining a substantially horizontal transverse axis of rotation. The axis of rotation is advantageously perpendicular to the longitudinal axis X when the foaming device 228 is positioned in the receiving housing 26. The hinge is positioned along a rear edge of an upper face of the first body 230.

[0187] The second body 234 forms the closing part and is movable between the open position and the closed position.

[0188] The second body 234 comprises a first portion 236, substantially horizontal in the operating position of the foaming device 228, forming a cover suitable for closing the access opening 80 of the mixing chamber 78 and the main flow conduit 48 when the second body 234 is in the closed position, and a portion 238, substantially vertical in the operating position of the foaming device 228, forming with the first body 230, when the second body 234 is in the closed position, the mixing chamber 78 and advantageously the foamed milk distribution element 114.

[0189] In this second embodiment, the mixing chamber 78 and the frothed milk distribution element 114 are formed by the assembly of the first body 230 and the second body 234 when the second body 234 is in the closed position.

[0190] Thus, when the second body is moved into the open position, the mixing chamber 78 and the frothed milk distribution element 114 are opened so that their cleaning is facilitated.

[0191] The additional ribs 144, 146 are adapted to exert a bearing force respectively against the mixing chamber 78 and the frothed milk distribution element 114. The bearing force is exerted on the second body 234 in a substantially horizontal direction. The additional ribs 144, 146 are particularly useful with the foaming device 228 according to the second embodiment to ensure the sealing of the mixing chamber 78 and the foamed milk distribution element 114.

[0192] In this second embodiment, the gripping zones of the foaming device 228 are formed on the lateral walls of the foamed milk distribution element 114.

[0193] Of course, the present invention is in no way limited to the embodiment described and illustrated, which has been given only by way of example. Modifications remain possible, particularly with regard to the composition of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

Demands

1. Beverage dispensing head (18) comprising a hot water / steam dispensing outlet (20) and a receiving housing (26) for a milk frothing device (28, 228) having a hot water / steam inlet orifice (46) adapted to be fluidly connected to the hot water / steam dispensing outlet (20), the beverage dispensing head (18) comprising a system for retaining the milk frothing device (28, 228) in the receiving housing (26), characterized in that the retaining system comprises a retaining lever (130) pivotally mounted relative to the receiving housing (26) and adapted to be moved between an open position allowing access to the receiving housing (26) and a closed position in which the retaining lever (130) is adapted to cooperate with the milk frothing device (28, 228) to retain it in the receiving housing (26).

2. Beverage dispensing head according to claim 1, characterized in that the retaining lever (130) is pivotally mounted about a longitudinal axis (X) of the beverage dispensing head (18), the open position corresponding to a high position and the closed position to a low position.

3. Beverage dispensing head (18) according to any one of the preceding claims, characterized in that the retaining lever (130) comprises at least one axial projection (132, 134) adapted to bear against the milk frothing device (28, 228), preferably two axial projections (132, 134) adapted to bear against the milk frothing device, when the retaining lever (130) is moved from the open position to the closed position while the milk frothing device (28, 228) is positioned in the receiving housing (26).

4. Beverage dispensing head (18) according to the preceding claim, characterized in that each axial projection (132, 134) is proper, when the milk frothing device (28, 228) is incorrectly positioned in the receiving housing (26), to cooperate with a corresponding anti-misalignment element (62, 64) positioned on the milk frothing device to prevent the movement of the retaining lever (130) in the closed position.

5. Beverage dispensing head (18) according to claim 3 or 4, characterized in that each axial projection (132, 134) is clean when the milk frothing device (28, 228) is correctly positioned in the receiving housing (26), to apply an axial force on a corresponding lug (62, 64) positioned on the milk foaming device (28, 228), when moving the retaining lever (130) into the closed position, to ensure the correct position and retention of the milk foaming device (28, 228) in the receiving housing (26).

6. Beverage dispensing head (18) according to any one of claims 3 to 5, characterized in that the retaining lever (130) comprises two axial projections (132, 134) positioned on either side of a central axis of the dispensing head.

7. Beverage dispensing head according to any one of claims 3 to 6, characterized in that each axial projection (132, 134) extends in a substantially vertical plane when the retaining lever is in the closed position and is attached to an upper wall (40) of the retaining lever (130).

8. Beverage dispensing head (18) according to any one of the preceding claims, characterized in that the retaining lever (130) comprises a front face provided with a gripping area (135) by a user to manipulate the retaining lever (130) between its open and closed positions.

9. Beverage dispensing head (18) according to any one of the preceding claims, characterized in that the receiving housing (26) comprises at least one guide element (70, 72) of the milk frothing device (28, 228) adapted to cooperate with a corresponding guide element (66, 68) located on the frothing device.

10. Beverage dispensing head (18) according to the preceding claim, characterized in that each guide element (70, 72) of the receiving housing is adapted to keep a closing part (96, 234) of the milk frothing device in contact with a mixing element (42, 232) of the frothing device when the milk frothing device (28, 228) is inserted into the receiving housing (26).

11. Beverage dispensing head (18) according to any one of the preceding claims, characterized in that the beverage dispensing head (18) comprises an upper face provided with a passage orifice (136) for an air flow control element (102) in the milk frothing device.

12. Beverage dispensing head (18) according to any one of the preceding claims, characterized in that the dispensing head of beverage (18) includes an upper wall provided with a viewing area (138) of a mixing portion (44) of the milk frothing device (28, 228).

13. Beverage dispensing head (18) according to any one of the preceding claims, characterized in that the beverage dispensing head (18) comprises a rear area (24) receiving a beverage dispensing member (22) and a front area defining the receiving housing (26) of the milk frothing device (28, 228).

14. Beverage dispensing machine (10) comprising a beverage dispensing head (18), characterized in that the beverage dispensing head (18) is according to any one of the preceding claims.

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