WO2023285990A1 - Infusion group for hot drink dispensing machine - Google Patents
Infusion group for hot drink dispensing machine Download PDFInfo
- Publication number
- WO2023285990A1 WO2023285990A1 PCT/IB2022/056462 IB2022056462W WO2023285990A1 WO 2023285990 A1 WO2023285990 A1 WO 2023285990A1 IB 2022056462 W IB2022056462 W IB 2022056462W WO 2023285990 A1 WO2023285990 A1 WO 2023285990A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- extraction
- group
- fluid
- pressure element
- pod
- Prior art date
Links
- 238000001802 infusion Methods 0.000 title claims abstract description 41
- 235000012171 hot beverage Nutrition 0.000 title abstract description 6
- 239000012530 fluid Substances 0.000 claims abstract description 32
- 235000013361 beverage Nutrition 0.000 claims abstract description 18
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 238000000605 extraction Methods 0.000 claims description 87
- 239000000463 material Substances 0.000 claims description 8
- 241001122767 Theaceae Species 0.000 claims description 7
- 235000016213 coffee Nutrition 0.000 claims description 7
- 235000013353 coffee beverage Nutrition 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 238000011161 development Methods 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000013519 translation Methods 0.000 claims description 2
- 230000005489 elastic deformation Effects 0.000 claims 2
- 238000006073 displacement reaction Methods 0.000 claims 1
- 239000003978 infusion fluid Substances 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 235000013616 tea Nutrition 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 235000015092 herbal tea Nutrition 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/24—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure
- A47J31/34—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure
- A47J31/36—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure with mechanical pressure-producing means
- A47J31/3666—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure with mechanical pressure-producing means whereby the loading of the brewing chamber with the brewing material is performed by the user
- A47J31/3676—Cartridges being employed
- A47J31/368—Permeable cartridges being employed
- A47J31/3685—Brewing heads therefor
Definitions
- Figures 2 and 2A show the first phase of the infusion cycle, with the bodies 2 and 3 sealingly closed on one another to define the infusion chamber 23 which receives the pod C.
- the platelet 12 in particular at its own peripheral lip, is deformed elastically by the dry pod C and abuts on the contrast means 20.
- the reaction force of the pod C determines the adhesion force between contrast means 20 and platelet 12.
- Figure 6 shows a structure of similar pressure element, herein designated with 7, with a different implementation, of peripheral step-like type, of the means for interfering with the first body, herein designated with 711. Even in this case holes 710 are provided on the stem.
- Embodiment variants may provide that the contrast means is defined directly on one flat or shaped portion of the surface 210 of the extraction chamber, or of one of the bodies implementing the latter.
Abstract
An infusion group (100) for use in a hot beverage dispensing machine, comprising:- a first (2) and a second (3) body which can be mutually abutted to define an infusion chamber (23) configured to receive a pod (C) of preparation to be infused, wherein the first body (2) is associated with means (4) for supplying the infusion fluid and the second body (3) is associated with means (5) for dispensing the exiting beverage;- an elastically deformable pod-pressing cap (1), integral with the first body (2) and, in use, facing the pod (C) received in the infusion chamber (23) so as to abut against the pod itself during an infusion cycle;- a contrast projecting edge (233) of the first body (2), configured so as to define, together with the pod-pressing cap (1), an access passage (200) for the infusion fluid into the infusion chamber (23), which passage is configured to open at a predetermined pressure of the fluid (2)
Description
INFUSION GROUP FOR HOT DRINK DISPENSING MACHINE
DESCRIPTION
Field of the invention
The present invention mainly relates to an extraction group, and in particular an infusion group, for use in a machine for dispensing beverages, especially hot beverages. In particular, the invention relates to the field of the beverages in form of infuse extracted from a disposable pod containing for example, coffee, tea, herbal teas or other preparations. Background of the invention
Many models of machine for the extemporary preparation of hot beverages, for example coffee, tea, herbal teas and the like, starting from a disposable or singled-dose pod, are known. The latter generally has a casing made of paper, and in general of a cellulose material or however porous/breathable material, including a particle preparation, for example in powder or granules.
The above-mentioned machines have been placed in the working environments, in the public places in general and, for many years, even in domestic environment.
The final beverage is obtained through a process of so-called “extraction”, which consists in making the pod to be crossed by a liquid, generally at high temperature, typically water. The liquid, downstream of the passage through the preparation, implements the beverage which is dispensed to the user. Such extraction is generally implemented by means of an infusion process.
The above-mentioned extraction and dispensing process is implemented in a dedicated group of the machine, indeed called extraction or infusion group. The latter typically comprises a pod-holder implemented in two portions which can be mutually abutted, defining an extraction or infusion chamber. An infusion head, having the ducts and the mechanisms for supplying the liquid, is integral to one
of the portions and a duct for dispensing the final beverage is associated with the other portion.
The majority of the extraction group are equipped with a dry thermal exchanger, or thermal block, to heat the water which has to arrive in the extraction chamber. The fluid is supplied through the exchanger and within the duct conducting to the extraction chamber by means of the action of a hydraulic pump.
This system, known and consolidated in the art, has some disadvantages. The main one is that the water, above all in the first extraction phases, transits too fast in the thermal block, arriving in the chamber housing the pod at lower temperature and pressure than the optimum ones. Moreover, the temperature and pressure regime in the extraction chamber tends to be not uniform during the time span of the extraction process. These circumstances worsen the organoleptic and aromatic properties of the final beverage. An additional drawback consists in that, at the end of the extraction phase, when the pump action ends, the residual fluid pressure in the extraction chamber and in the associated ducts may not be disposed of adequately, to the detriment of the performances of the machine and of the stresses acting thereon.
Summary of the invention
The technical problem placed and solved by the present invention then is to provide an extraction group for a machine for dispensing beverages such as coffee, tea and the like allowing to obviate one or more of the drawbacks mentioned with reference to the known art.
Such problem is solved by an extraction group according to claim 1.
Preferred features of the present invention are set forth in the depending claims.
Under pod in the present context a package of preparation for beverage enclosed in a permeable and compliant, that is deformable, external casing is meant. In particular, as designated with reference to the known art, a pod has a casing
made of paper, and in general of a cellulose material or however porous/breathable material, containing a particle preparation, for example in power or granules. The invention provides an extraction group, and in particular an infusion group, having a movable and elastically deformable pressure element, acting on the surface of the pod thereat the entry of the extraction liquid takes place.
Such pressure element, also called pod-pressing cap, is interposed, in use, between a wall of the extraction chamber and the pod. The element interacts with both of them, by deforming elastically, or by moving, in selected phases of the extraction cycle. In particular, after closing the extraction chamber the pressure element is deformed elastically, or displaced, by the dry pod so as to abut on contrast means of the extraction chamber. In this way, a valve is implemented which allows the entry of fluid into the extraction chamber only upon reaching a predefined pressure regime of the fluid itself which brings the pressure element back towards a rest configuration or a configuration of additional elastic bending. In other words, upon reaching the predetermined pressure the fluid deforms or displaces the pressure element, which in turn deforms plastically the pod and allows the fluid to penetrate into the extraction chamber through the pod itself. At the end of the extraction, the- now wet - pod remains deformed permanently and the residual fluid may flow backwards in a compartment, that is through an open valve, defined between pressure element and wall of the extraction chamber, that is contrast means, to be discharged backward in extremely effective way. Then, the pressure element allows to delay the arrival of the liquid in the extraction chamber until a predetermined and optimum pressure, and consequently temperature, is reached. Moreover, it becomes possible to keep the water temperature and pressure in the extraction chamber constant, or however more uniform with respect to the known systems, for the whole duration of the extraction phase.
Advantageously, the pressure element is made of an elastic material or however a material with a configuration suitable to confer elastic deformability to the element itself. The element can be made of nylon, rubber, polymers, thin metal sheets or other. The element can be implemented, for example, by injection moulding.
Other advantages, features and use modes of the present invention will result evident from the following detailed description of some embodiments shown by way of example and not for limitative purposes.
Brief description of figures
The figures of the enclosed drawings will be referred to, wherein:
■ Figure 1 shows a view in longitudinal section di an extraction group according to a preferred embodiment of the present invention, in an open configuration;
■ Figure 1 A shows an enlarged detail of Figure 1 ;
■ Figure 1 B shows a view in longitudinal section and an exploded view of a detail of the extraction group of Figure 1 ;
■ Figure 2 shows a view in longitudinal section of the extraction group of Figure 1 in a closing configuration preceding the start of an infusion phase;
■ Figure 2A shows an enlarged detail of Figure 2;
■ Figure 3 shows a view in longitudinal section of the extraction group of Figure 1 in a closing configuration during the infusion phase;
■ Figure 3A shows an enlarged detail of Figure 3; ■ Figure 4 shows a view in longitudinal section of the extraction group of Figure
1 in a closing configuration subsequent to the infusion phase, during the discharge of the residual fluid pressure;
■ Figure 4A shows an enlarged detail of Figure 4;
■ Figures 5 and 6 show each one a perspective view of a pod-pressing cap usable in the extraction group of Figure 1, according to a respective embodiment.
The sizes represented in the above-mentioned figures are to be meant as exemplifying and not necessarily in proportion. Detailed description of preferred embodiments
Several embodiments and variants of the invention will be described hereinafter, and this with reference to the above-mentioned figures.
In the following detailed description, additional embodiments and variants with respect to embodiments and variants already treated in the same description will be illustrated limitedly to the differences with what already illustrated.
Moreover, the different embodiments and variants described hereinafter are likely to be used in combination, where compatible.
By firstly referring to Figures 1 , 1 B and 2, an extraction group, and in particular an infusion group, according to a preferred embodiment of the invention is designated as a whole with 100.
The infusion group 100 is configured to be integrated in a machine for dispensing hot beverages, such as for example coffee, tea and the like.
The infusion group 100 mainly comprises: B a first and a second body, respectively 2 and 3, which can be mutually sealingly abutted - that is which can be closed against one another - to define an infusion chamber 23 configured to receive a pod C containing a preparation to be infused;
■ a pressure element, or pod-pressing cap, 1 mounted on the first body 2;
■ means 4 for feeding an infusion fluid, in particular water, within a duct 22 of the first body 2 arriving in the infusion chamber 23.
Each one of such components will be now described in greater detail.
The feeding means 4 is represented, for sake of simplicity, only in Figures 2, 3 and 4. In the present example it comprises: a supply pump 41; an electro-valve 42, or other means for blocking/enabling selectively the flow; and a dry heat exchanger, or thermal block, 43. Such components are arranged in series with respect to the fluid supply direction. The supply means 4 further comprises ducts for the hydraulic connection between the just mentioned components, generally designated with 45, and an exhaust duct 46 selectively enabled by the electro valve 42.
The feeding means 4, as said, is in hydraulic communication with a duct 22 obtained in, or integral with, the first body 2 and configured for feeding the fluid in the infusion chamber 23.
The second body 3 is associated with means 5 for dispensing the beverage exiting from the infusion chamber 23, comprising in particular a duct for outflowing the beverage designated with 5 too.
The first and the second body 2 and 3 have facing shaped surfaces, or walls, respectively 210 and 310, defining each one a concave half-seat with half- ellipsoidal profile for receiving and supporting the pod, or to implement the infusion chamber 23. The wall 310 of the second body 3 implements a filter allowing the beverage to outflow towards the duct 5.
In the present embodiment, the first body 2 is movable in translation towards the second body 3 so as to enclose therebetween the pod C at first received in the half-seat 310 of the second body 3.
An upper surface or surface for the entry of the infusion fluid, SI, and a lower surface, or a surface for the exit of the beverage, SU, are defined on the pod C, for reference. As shown in Figure 1, in the present example the infusion group 100, and in particular the extraction chamber 23, has a longitudinal axis of symmetry, or substantial symmetry, L, substantially orthogonal to the surfaces SI and SU of the pod C. At the surface 210 of the first body 2, in particular in centered position with respect thereto, the outlet of the feeding duct 22 is provided.
Such outlet, in the present example, is closed, or partially, closed, by the pressure element 1 , as shown in the drawings and explained hereinafter.
The pressure element 1, in the present embodiment, comprises a pressure platelet 12 and a stem 11 originating therefrom.
The platelet 12 has preferably circular geometry. Its periphery implements a lip elastically flexible according to a bending axis T substantially orthogonal to the plane of the figures.
The stem 11 erects centrally from the platelet 12, by implementing a substantially “T”-like configuration. Platelet 12 and stem 11 are integral, or however in one piece, with one another. The stem 11 has preferably hollow structure with blind bottom, to allow the infusion fluid to arrive inside it and outgo towards the infusion chamber 23 through shaped holes or passages designated with 110.
The stem 11 is useful for the assembly on the first body 2. In particular, in the present example means of mutual engagement 21 is provided, preferably including a shape coupling between a projecting annular edge, or two or more projecting teeth, 111 of the stem 12 and one or more respective seats or recesses 211 obtained in the first body 2, in particular on the wall defining the duct 22. In the present example, the access(es) 211 define a graft and anchoring throat of the pressure element 1.
As said above, the pressure element 1, or at least its platelet 12 or a portion thereof, is elastically deformable.
The pressure element 1 , for example, is made of a material selected from a group comprising: nylon, rubber, polymers, thin sheet metal.
The platelet 12 of the pressure element 1, on the opposite side with respect to the stem 11, has an engagement cross surface 121 facing, in use, the pod C received in the infusion chamber 23 and configured to abut against the pod itself.
In the present example, the engagement surface 121 is arranged substantially centered, and orthogonal, with respect to the longitudinal axis of symmetry L of the extraction chamber 23.
The first body 2, at the wall 210 facing the second body 3, has contrast means 20 facing a surface 122 of the platelet 12 arranged on opposite side with respect to the engagement surface 121 of the pod C. Such contrast means 20, in the present example, includes a protruding interference edge 233, in particular with annular shape.
In rest configuration, or when it is not elastically deformed, the platelet 12, and in particular its engagement surface 121, projects inside the infusion chamber 23, and then with respect to the wall 210 and to the contrast means 20 of the first body 2.
As it will be shortly illustrated in greater details, the contrast means 20 and the platelet 12 define an access valve passage 200 for the infusion fluid in the chamber 23. Such valve passage is closed at the beginning of the infusion phase, after closing the bodies 2 and 3 on one another, and it is configured to open at a predetermined pressure of the fluid arriving through the first body 2 and through the holes 110.
In the present embodiment, the valve passage 200 is peripherally arranged with respect to the duct 22 for feeding the infusion fluid, preferably having an annular development.
The operating modes of the infusion group 100 and in particular of its pressure element 1 will be now described.
Figures 1 and 1A show a phase for abutting the first and the second body 2 and 3, whereas the pod C is received resting on the wall 310 of the second body 3. No infusion fluid, obviously, is supplied by the means 4 in this phase. When the two bodies 2 and 3 are spaced apart and in the phase for abutting to one another, the surface 122 is longitudinally spaced apart by the contrast means 20.
Figures 2 and 2A show the first phase of the infusion cycle, with the bodies 2 and 3 sealingly closed on one another to define the infusion chamber 23 which receives the pod C. The platelet 12, in particular at its own peripheral lip, is deformed elastically by the dry pod C and abuts on the contrast means 20. The reaction force of the pod C determines the adhesion force between contrast means 20 and platelet 12.
As exemplified by the arrows represented in said Figures 2 and 2A, the infusion fluid is supplied in the duct 22 of the first body 2 and then through the stem 11 and its holes 110, whereas the exhaust duct 46 is blocked by the electro-valve 42. The infusion fluid does not arrive in the infusion chamber 23 due to the interference between edge 233 and wall 122 of the platelet 12. In other words, the valve passage 200 defined by them is closed. The fluid temperature increases due to the passage of the thermal block 43 and also increases the relative pressure in the duct 22 and on the valve passage 200. The hydraulic circuit then saturates with fluid before the infusion, and then the beverage dispensing, starts.
Figures 3 and 3A exemplify the condition in which the fluid pressure reaches a predetermined and pre-set value which determines the plastic deformation of the platelet 12 and its detachment from the edge 233, that is the opening of the valve passage 200 and the entry of the fluid in the chamber 23. The platelet 12, in this phase, deforms the pod C. Even in this case, the flow is exemplified by arrows in Figures 3 and 3A. In this phase, the water, hits the pod at an already high pressure, and it is perfectly heated at the optimum infusion temperature thanks to the slow and restrained
passage through the thermal block 43.
The above-mentioned predetermined pressure can be comprised in a range of about 9-20 bar, depending upon the specific type of dispensing machine.
By referring to Figures 4 and 4A, once the infusion period has ended the pump 41 ceases its own action and the electro-valve 42 enables the exhaust duct 46.
In this way, a backward flow of the infusion fluid towards the exhaust duct 46 is determined, even here highlighted by arrows in figures. In particular, the outflow is possible since the pod C remains deformed, it does not seal on the platelet 12 and it does not exert any pre-load thereon. Then the passage 200 remains open.
It will be then appreciated that, in the present embodiment, the pressure element 1 is suitable to assume different configurations, corresponding to different phases of the extraction cycle, and in particular: a first rest configuration, corresponding to a spaced-apart position of the first and second body 2 and 3, wherein the pressure element 1 is spaced apart from the contrast means 20 and the valve passage 200 is open, although not operational since in absence of flow; and a second elastically deformed configuration, wherein the pressure element 1 is deformed to abut on the contrast means 20 as a result of the pressure exerted on it by the dry pod, by closing the valve passage 200, which second configuration corresponds to a sealingly abutment position of the first and second body 2 and 3 preceding the entry of fluid in the infusion chamber 23; a third elastically deformed configuration, or configuration for returning in rest configuration, wherein the two bodies 2 and 3 are still sealingly closed on one another, but the wet pod is deformed plastically and does exert a relevant force on the pressure element 1 , which then is spaced apart from the contrast means 20 by keeping open the valve passage 200. Based upon what illustrated sofar, it will be then better appreciated that the
pressure element 1 allows to intercept the water flow in the infusion starting phase, immediately before the preparation is reached, without preventing depressurization at the end of infusion. The last circumstance is made possible by the deformation of the pod, which takes place when the group closes, and which, upon wetting and by its very nature, has no memory effect.
It will be appreciated that the invention further provides an extraction method according to what illustrated above in relation to the operation of the group 100.
Figures 5 and 6 show, each one, a respective embodiment exemplifying a pressure element as described above, which can be used in the extraction group 100. In particular, the element of Figure 5, designated with 6, provides means 611 for interfering mechanically with the body 2 of the group in form of a plurality of protruding projections, in case elastically deformable to favour the engagement and retaining.
Longitudinal slits 610 are further provided on the stem. Figure 6 shows a structure of similar pressure element, herein designated with 7, with a different implementation, of peripheral step-like type, of the means for interfering with the first body, herein designated with 711. Even in this case holes 710 are provided on the stem.
Embodiment variants may provide that the contrast means is defined directly on one flat or shaped portion of the surface 210 of the extraction chamber, or of one
of the bodies implementing the latter.
Moreover, embodiment variants may provide a selectively movable pressure element, for example sliding selectively according to the direction L, instead of, or as well as, elastically deformable.
The present invention has been sofar described with reference to preferred embodiments. It is to be meant that other embodiments belonging to the same inventive core may exist, as defined by the protective scope of the herebelow reported claims.
Claims
1. An extraction group (100), in particular an infusion group, for use in a machine for dispensing beverages such as for example coffee, tea and the like, which extraction group comprises: - a first (2) and a second (3) body which can be mutually sealingly abutted to define an extraction chamber (23) configured to receive a pod (C) containing a preparation, wherein said first body (2) is associated with means (4) for supplying the extraction fluid entering said extraction chamber (23) and said second body (3) is associated with means (5) for dispensing the beverage exiting from said extraction chamber (23);
- a movable or elastically deformable pressure element (1 ), mounted on said first body (2) and having an engagement surface (121) projecting into said extraction chamber (23), which engagement surface (121) is configured to abut against the pod when said first (2) and second (3) body are sealingly abutted to one another;
- contrast means (20) of said first body (2), configured in such a way as to define, together with said pressure element (1), an access valve passage (200) for the extraction fluid into the extraction chamber (23), wherein said valve passage (200) is configured to open at a predetermined pressure of the extraction fluid insisting on it by means of an elastic deformation or displacement of said pressure element (1).
2. The extraction group (100) according to claim 1, wherein said first body (2) is movable in translation towards said second body (3).
3. The extraction group (100) according to claim 1 or 2, comprising means of mutual engagement (21) of said pressure element (1) and said first body (2), preferably including a shape coupling (21 , 111, 211).
4. The extraction group (100) according to any one of the preceding claims, wherein said pressure element (1) is apt to assume: a first rest configuration, corresponding to a spaced-apart position of said
first (2) and second (3) body, wherein it is spaced apart from said contrast means (20); and
■ a second elastically deformed or displaced configuration, wherein it is deformed or displaced to abut on said contrast means (20) as a result of the pressure exerted on it by the dry pod, which second configuration corresponds to a sealingly abutment position of said first (2) and second body (3) preceding the entry of fluid into the extraction chamber (23).
5. The extraction group (100) according to the preceding claims, wherein said pressure element (1) is apt to assume a third elastically deformed or differently displaced configuration, wherein it is spaced apart from said contrast means (20) as a result of the fluid pressure insisting at said valve passage (200).
6. The extraction group (100) according to any one of the preceding claims, wherein said engagement surface (121) has a substantially circular geometry.
7. The extraction group (100) according to any one of the preceding claims, wherein said engagement surface (121) is arranged substantially centered with respect to a longitudinal axis of symmetry (L) of the extraction chamber (23).
8. The extraction group (100) according to any one of the preceding claims, wherein said pressure element (1) is elastically deformable according to a transverse bending axis (F).
9. The extraction group (100) according to any one of the preceding claims, wherein said pressure element (1) is in form of a pod-pressing cap.
10. The extraction group (100) according to any one of the preceding claims, wherein said pressure element (1) comprises a pressure platelet (12) having said engagement surface (121) and elastically deformable in bending at a peripheral lip thereof preferably having an annular development.
11. The extraction group (100) according to any one of the preceding claims, wherein said pressure element (1) comprises a stem (11) for mounting on said first body (2).
12. The extraction group (100) according to any one of the preceding claims, wherein said pressure element (1) has holes or passages (110) for feeding the
extraction fluid towards said valve passage (200).
13. The extraction group (100) according to claims 11 and 12, wherein said stem (11) has said holes or passages (110), for example in form of longitudinal slits.
14. The extraction group (100) according to any one of the preceding claims, wherein said pressure element (1) is made of a material selected from a group comprising: nylon, rubber, polymers, sheet material.
15. The extraction group (100) according to any one of the preceding claims, wherein said contrast means (20) includes a protruding interference edge (233), in particular with annular shape, obtained on said first body (2) and configuration to interfere, in use, with said pressure element (1).
16. The extraction group (100) according to any one of the preceding claims, wherein said valve passage (200) is peripherally arranged with respect to a duct (22) for feeding the extraction fluid obtained in said first body (2), preferably having an annular development.
17. The extraction group (100) according to any one of the preceding claims, comprising means (42) for blocking the supply of extraction fluid, in particular an electro-valve, configured to determine, at the end of the extraction phase, a backward flow of the extraction fluid towards an exhaust duct (46).
18. A machine for dispensing beverages such as for example coffee, tea and the like, comprising an extraction group (100) according to any one of the preceding claims.
19. An extraction method, in particular an infusion method, for a machine for dispensing beverages such as for example coffee, tea and the like, comprising the following steps of:
(a) feeding an extraction fluid towards an extraction chamber (23) containing a pod (C) of preparation to be extracted through a heat exchanger (43) to heat said extraction fluid;
(b) retaining said extraction fluid outside said extraction chamber (23) until a predetermined fluid pressure is reached;
(c) enabling the entry of fluid into the extraction chamber (23) upon reaching said predetermined pressure, wherein said steps (b) and (c) are carried out by means of a valve passage (200) implemented by means of contrast means (20) associated with a wall of the extraction chamber (23) and acting on an elastically deformable or displaceable pressure element (1) abutting on a surface of the pod (C), wherein said valve passage (200) is configured to open at a predetermined pressure of the extraction fluid insisting on it, in particular by means of an elastic deformation of said pressure element (1).
20. The extraction method according to the preceding claim, using an extraction group according to any one of claims 1 to 17.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102021000018695A IT202100018695A1 (en) | 2021-07-15 | 2021-07-15 | BREW GROUP IN A HOT DRINK DISPENSING MACHINE |
| IT102021000018695 | 2021-07-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023285990A1 true WO2023285990A1 (en) | 2023-01-19 |
Family
ID=78086711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB2022/056462 WO2023285990A1 (en) | 2021-07-15 | 2022-07-13 | Infusion group for hot drink dispensing machine |
Country Status (2)
| Country | Link |
|---|---|
| IT (1) | IT202100018695A1 (en) |
| WO (1) | WO2023285990A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080095903A1 (en) * | 2004-12-21 | 2008-04-24 | Martex Holland B.V. | Apparatus For Preparing A Beverage |
| US20090266238A1 (en) * | 2005-04-29 | 2009-10-29 | Illycaffe' S.P.A. | Filter holder particularly for espresso coffee machines |
-
2021
- 2021-07-15 IT IT102021000018695A patent/IT202100018695A1/en unknown
-
2022
- 2022-07-13 WO PCT/IB2022/056462 patent/WO2023285990A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080095903A1 (en) * | 2004-12-21 | 2008-04-24 | Martex Holland B.V. | Apparatus For Preparing A Beverage |
| US20090266238A1 (en) * | 2005-04-29 | 2009-10-29 | Illycaffe' S.P.A. | Filter holder particularly for espresso coffee machines |
Also Published As
| Publication number | Publication date |
|---|---|
| IT202100018695A1 (en) | 2023-01-15 |
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