Extraction unit

Abstract

The invention discloses a directional flow extraction method, a directional flow extraction device and an extract. A directional flow extraction method may include: loading an extraction material into an extraction unit having a first portion and a second portion; introducing a first measurable amount of the extraction medium via a first portion of the extraction unit; discharging the gas from the extraction unit via a second portion of the extraction unit; closing the second portion of the extraction unit and increasing the pressure in the extraction unit when the extraction medium flows into the first portion of the extraction unit; stopping the flow of the extraction medium into the extraction unit; immersing the extraction material in an extraction medium under pressure to produce an extract; and introducing a second measurable amount of the extraction medium via the first portion of the extraction unit to urge the extract through a second portion of the extraction unit. In some embodiments, the first portion is a bottom portion of the extraction unit and the second portion is a top portion of the extraction unit.

Description

[0001] This application is a divisional application of the patent application with application number 201880053578X, application date August 14, 2018, and invention name “Extraction Unit”. Technical Field

[0002] The present disclosure relates to systems and methods for preparing edible extracts, such as systems and methods for preparing edible extracts under pressure from cold or ambient solvents. Background Art

[0003] Some brewed beverages are prepared by extracting seeds, leaves, berries or other plant materials containing desired flavors, aromas or compounds in a suitable solvent. However, the process of extracting the desired ingredients from plant materials may be time-consuming, and the richness of the final extract is closely related to the ratio of total dissolved solids (TDS) extracted by the solvent. Therefore, high temperatures are often used to increase the extraction rate and reduce the time required to obtain high TDS. For example, espresso is usually prepared by extracting roasted and ground coffee beans in near-boiling water under high pressure. Other technologies require multiple rounds of extraction to increase the yield of the extraction process. However, high temperatures and repeated extractions may sometimes lead to the extraction of undesirable compounds from plant materials, such as acids and tannins, which can have a negative impact on the quality of the final beverage. In contrast, extractions performed at low temperatures often lack the richness of their high temperature counterparts, showing lower TDS content. Such extracts may be considered "light" or lack flavor, and the strong characteristics of extracts obtained at high temperatures cannot be replicated. BRIEF DESCRIPTION OF THE DRAWINGS

[0004] Various embodiments are depicted in the drawings for the purpose of illustration and should in no way be construed as limiting the scope of the embodiments. Various features of the different disclosed embodiments can be combined to form further embodiments, which are also part of the present disclosure.

[0005] Figure 1 An embodiment of an extraction unit is schematically shown.

[0006] FIG. 2A to FIG. 2E An embodiment of a method for preparing an extract in an extraction unit is schematically shown.

[0007] Figure 3 Schematically shows Figure 1 Internal view of the second part of the extraction unit and the filter.

[0008] Figure 4 It is a schematic system of the extraction unit control system. DETAILED DESCRIPTION

[0009] Overview

[0010] Various extraction systems and methods are described below to illustrate various examples that can achieve one or more desired improvements. These examples are illustrative only and are not intended to limit the general disclosure presented and the various aspects and features of the present disclosure in any way. Without departing from the spirit and scope of the present disclosure, the general principles described herein can be applied to embodiments and applications other than those discussed herein. In fact, the present disclosure is not limited to the specific embodiments shown, but is consistent with the widest range of principles and features that meet the principles and features disclosed or proposed herein.

[0011] Many of the embodiments described herein are related to extracting coffee beans to produce coffee extract. For example, in some embodiments, the material to be extracted (also referred to herein as "extraction material") can be coffee. The coffee used can be any variety or species from anywhere in the world. For example, Arabica coffee (Arabica) from anywhere in the world (such as Brazil, Indonesia, Central America, Africa, etc.) and any mixture of Arabica coffee. In some embodiments, the extraction material can be an edible substance, and can also be at least one of green coffee cherries, red coffee cherries, coffee flowers, coffee cherry pulp, coffee cherry stems, coffee cherry exocarp or coffee cherry mesocarp in whole or in part. However, it should be appreciated that certain features and aspects of the embodiments disclosed herein can be applicable to other beverages other than coffee extract, such as tea and other similar brews. For example, in yet other embodiments, the extraction material can be green tea leaves and / or partially or completely dehydrated tea leaves. In yet other embodiments, the extraction material may include fruits, nuts or similar plant matter, including vanilla beans, chocolate beans, hazelnuts, almonds, macadamia nuts, peanuts, cinnamon, mint, apples, apricots, aromatic bitters, bananas, blackberries, blueberries, celery, cherries, cranberries, strawberries, raspberries, gin, brandy, cachaca, carrots, citrus, lemons, limes, oranges, grapefruits, tangerines, coconuts, menthol, ginger, licorice, milk, pecans, pistachios, walnuts, peaches, pears, peppers, etc. Therefore, the descriptions herein are not limited to espresso, coffee, coffee products, tea or tea products.

[0012] Likewise, some implementations of the systems, methods, and compounds described herein refer to cold extracts. In some configurations, cold extracts can be coffee extracts, tea extracts, herbal extracts, and the like. In addition, the term is widely used to refer to extracts prepared using an extraction medium (also referred to herein as a solvent) not exceeding 100°C. In some embodiments, a cold extract can be produced in a process without utilizing a pressure exceeding 16 bar (g) (gauge pressure value). For example, in some configurations described herein, the extraction medium can be between about 0°C and about 100°C. In some embodiments, the temperature of the extraction medium can be between about 10°C and about 30°C. In some implementations, the extraction medium can be a liquid, such as water, but in some implementations, the extraction medium can be other liquids. In other configurations, some inert gases can also be used to displace the extraction medium. In some implementations, as described below, the extraction medium is at ambient temperature when added to the extraction unit. In certain embodiments, the process for forming the cold extract can be carried out at a pressure between about 0 bar(g) and 16 bar(g), and in certain configurations, the pressure can be between about 0.8 bar(g) and 3 bar(g), and in certain embodiments, these pressure ranges can be used in combination with the above-mentioned temperature ranges.

[0013] Although certain aspects, advantages and features are described herein, it is not necessary for any particular embodiment to include or implement any or all of these aspects, advantages and features. For example, some embodiments may not implement the advantages described herein, but may implement other advantages. Any structure, feature or step in any embodiment may be used as a replacement or additional mode for any structure, feature or step in any other embodiment, or may be omitted. The present disclosure encompasses all combinations of features from various disclosed embodiments. No feature, structure or step is essential or indispensable.

[0014] Example Embodiment Extraction Unit

[0015] Figure 1 An embodiment of an extraction unit 100 is schematically shown. For ease of presentation, the extraction unit 100 will often be described in the context of an extraction material in the form of tea leaves or ground coffee beans to prepare a tea or coffee extract using water as an extraction medium. However, as described above, certain features and aspects of the present disclosure may also be applied in other contexts. For example, the extraction unit 100 may also be used to extract tea leaves to prepare a tea extract, or other similar infusions or other extraction materials or extraction media may be used in certain arrangements.

[0016] As shown in the figure, Figure 1The extraction unit 100 comprises a first part 103 and a second part 106. In the illustrated embodiment, the first part 103 and the second part 106 are both cylindrical. What couples the first part 103 to the second part 106 is a sidewall 104, so that the extraction unit 100 can have a cylindrical shape. In this way, the first part 103, the second part 106 and the sidewall 104 are used to define the boundary between the outside 110 of the extraction unit 100 and the inside 109 of the extraction unit 100, thereby forming a substantially liquid-tight shell, which can be filled with desired extraction materials and suitable extraction media to form an extraction slurry. In the illustrated embodiment, the first part 103 corresponds to the lower part or bottom part of the extraction unit 100, and the second part 106 corresponds to the upper part or top part of the extraction unit 100. Therefore, in the description herein, the first part 103 can also be referred to as the bottom part or the lower part. In a similar manner, the second part 106 can be referred to as the top part or the upper part. As will be explained below, the arrangement shown has certain advantages. For example, in some configurations, the second portion 106 can be partially or completely removed so as to introduce the desired extraction material. For example, in some configurations, the second portion 106 can be implemented as a removable lid, a sliding window or a flip top cover, but various other implementations can also be used. In addition, in some arrangements, the orientation of the extraction unit 100 can be changed so that the orientation of the first portion 103 and the second portion 106 is reversed or located at other positions, such as the extraction unit 100 is positioned so that its side is downward, so that the first portion 103 and the second portion 106 are located at the same or close to the same height. Therefore, in some configurations, at least one of the first portion 103 or the sidewall 104 can be implemented as a removable lid, or is equipped with a mechanism configured to form an opening, and the extraction material can be loaded into the inside 109 of the extraction unit 100 via this opening.

[0017] The interior 109 of the extraction unit 100 can be characterized by a length L and an average width W along the length L. The length L and the average width W of the extraction unit define the internal aspect ratio AR of the extraction unit 100 (aspect ratio = L / W). The internal aspect ratio AR of the extraction unit can allow a user to control the contact ratio of the extraction material relative to the extraction medium. The contact ratio of the extraction material to the extraction medium affects the extraction characteristics - an increased contact ratio results in a shortened extraction time and a more concentrated extract. Therefore, as long as the internal aspect ratio AR of the extraction unit is reasonably maintained, the overall size of the extraction unit 100 can be increased, decreased, or otherwise changed to suit specific production needs without significantly affecting the extraction characteristics. In some embodiments, the internal aspect ratio AR can be in the range of about 1:1 to about 10:1. For example, in certain configurations, the internal aspect ratio AR can be in the range of about 2:1 to about 4:1, or approximately in the aforementioned range or any value between the aforementioned ranges.

[0018] Extraction unit 100 can be configured to cause plug flow. The term plug flow is used according to its ordinary and common meaning, referring to a fluid transmission model that maintains a constant flow rate across the radial axis of the chamber. Due to the substantially constant flow rate, mixing between adjacent fluid layers is substantially avoided. In this way, the first portionable portion of the extraction medium can be discharged from the chamber using the second portionable portion of the liquid without substantially mixing. For example, in certain embodiments of the present disclosure, the contents of the extraction unit 100 are discharged by starting the flow through the first portion 103 of the extraction medium. In the case where the extraction medium reaches a constant speed across the internal width of the extraction unit 100, a plug flow can be caused, and the contents of the extraction unit 100 (that is, the prepared extract) can be discharged from the extraction unit 100. Since the extraction medium can show a substantially constant speed across the width of the extraction unit 100, the undesirable mixing between the extraction medium flow and the prepared extract of the extraction unit 100 can be avoided, and the prepared extract will not be diluted by the second flow of the extraction medium.

[0019] Extraction unit 100 can be made of any suitable material. For example, first portion 103, second portion 106 and sidewall 104 can each independently include metal, ceramic, plastic, glass or other substantially solid compounds. For example, in some configurations, first portion 103, second portion 106 and sidewall 104 can be constructed of substantially opaque metal compounds. In other configurations, at least sidewall 104 can be made of substantially transparent or at least partially translucent compounds, such as glass or plastic. Advantageously, in such a configuration, the user can view the contents of extraction unit 100 and determine the progress of extraction based on the appearance of the contents residing in extraction unit 100.

[0020] Continue to refer Figure 1 In the illustrated embodiment, the first portion 103 includes an inlet 102 to allow the extraction medium to be introduced into the extraction unit 100 through the first portion 103 (which, as described above, can be the bottom portion 103). The inlet 102 can be a generally hollow portion of a pipe or tube for forming an opening in the first portion 103. The inlet 102 can in turn be in fluid communication with an inlet conduit 101. The inlet conduit 101 can similarly include a generally elongated hollow portion of a pipe or tube for providing a path for the flow of an extraction medium (such as water or gas) from any suitable source toward the inlet 102. In this way, the inlet conduit 101 is in fluid communication with the interior 109 of the extraction unit 100 via the inlet 102. Thus, a supply of water or any other extraction medium can be introduced into the interior 109 of the extraction unit 100 through the first portion 103. Although one inlet is shown, more than one inlet can be used, or the inlet can be divided into a plurality of sub-inlets.

[0021] One or more inlet valves 111 may be arranged along the inlet conduit 101 and / or at the inlet 102. In this way, the flow of extraction medium into the interior 109 of the extraction unit 100 may be controlled. Suitable valves include, for example, umbrella valves, duckbill valves, or any other suitable temporary closing mechanism. By adjusting the inlet valve 111, the flow of water into the interior 109 of the extraction unit 100 may be started, stopped, regulated, or otherwise controlled depending on the desired extraction characteristics. Likewise, in some configurations, the inlet conduit 101 may be equipped with a suitable valve or filter to act as a backflow inhibitor. Thus, even if the contents of the extraction unit are subject to considerable backpressure, plant material, solvent, or even the extract itself may be prevented from flowing back toward the inlet conduit 101 via the inlet 102. For example, in Figure 1 In the illustrated embodiment, the inlet 102 may be equipped with a strainer 150. In this way, the extracted material may be prevented from flowing back toward the inlet conduit 101. In certain configurations, the strainer 150 may have an average pore size in the range of about 0.3 mm to about 1 mm.

[0022] like Figure 1 As shown, the second portion 106 may also include an outlet 107. As with the inlet 102 discussed above, the outlet 107 may be in fluid communication with the extract outlet conduit 108. In some configurations, the outlet 107 may be further coupled to an air outlet conduit 113, such as Figure 1As shown. In this way, the extract outlet conduit 108 and the air outlet conduit 113 are both in fluid communication with the interior 109 of the extraction unit 100, thereby providing a path for both the air and the extract residing in the interior 109 of the extraction unit 100, for displacing or otherwise removing the air and the extract from the interior 109 of the extraction unit 100 through the second part 106 of the extraction unit 100. In some arrangements, an independent conduit and outlet may be provided on the second part 106 to provide a path for both the air and the extract residing in the interior 109 of the extraction unit 100, and / or more than one outlet may be provided, and / or the outlet may be divided into a plurality of sub-outlets. In order to prevent or control the discharge of the extract or air from the interior 109 of the extraction unit 100, one or more outlet valves 112 may be arranged in the outlet 107, the extract outlet 108 or the air outlet 113. The outlet valve 112 may also be used to prevent or control the discharge of air from the interior 109 of the extraction unit 100. The one or more outlet valves 112 may include an umbrella valve, a duckbill valve or other suitable temporary closing mechanism. In this manner, the flow of extract and / or air from the interior 109 of the extraction unit 100 may be started, stopped, adjusted or otherwise controlled depending on desired extraction characteristics.

[0023] In some configurations, at least one of the inlet valve 111 and the outlet valve 112 may be communicatively coupled to a controller, as will be described with reference to FIG. Figure 4 Detailed description. The controller can be directly manipulated by the user, or the controller can be communicatively coupled to the user interface. In this way, the user and / or the control system of the extraction unit 100 can manipulate the inlet valve 111 or the outlet valve 112 to adjust certain extraction characteristics. For example, in some embodiments, the user and / or the control system of the extraction unit 100 can close the outlet valve 112 when the solvent flow persists, thereby being able to build up pressure in the interior 109 of the extraction unit 100, and thus increase the extraction rate.

[0024] In the illustrated embodiment, the second part 106 can include a filter 105. The filter 105 can separate the heterogeneous extraction slurry into its constituent components to produce a substantially homogeneous extract. The filter 105 can be positioned near or adjacent to the outlet 107. In some configurations, the filter 105 and the outlet 107 have substantially the same size and geometry. The resulting extract can then be isolated and / or retained for further processing, packaging or consumption. The filter 105 can be any suitable filtering configuration. For example, in some configurations, the filter 105 can be a fine filter, a mesh filter, a membrane filter or other suitable filtering devices. In addition, in some configurations, the filter 105 can be selected so that when the mixture flows toward the outlet conduit 108, the pore size or pore size will capture the extraction material but will not adversely affect the flow of the extract. As an alternative, the pore size of the filter 105 can be selected so that the flow of the extract coming out of the extraction unit 100 is significantly hindered. In this way, even when the outlet 107 and the extract conduit 108 are opened or otherwise configured to receive a flow of extract, a significant back pressure can be established within the interior 109 of the extraction unit 100 as additional aliquots of the extraction medium flow into the interior 109 of the extraction unit 100 via the inlet 102. In some implementations, the filter 105 can have an average pore size in the range of about 0.01 mm to about 1 mm. For example, in some configurations, the average pore size of the filter 105 is in the range of about 0.05 mm to about 0.35 mm. In some configurations, the filter 105 has an average pore size of about 0.10 mm.

[0025] Figure 3 An internal view of an embodiment of the second portion 106 of the extraction unit 100 is depicted. Figure 3As shown, the filter 105 can be arranged adjacent to the outlet so that the filter 105 substantially completely covers the outlet. In this way, the waste coffee grounds can be separated from the extraction slurry so that only substantially homogeneous extracts are allowed to flow through the filter 105, enter the outlet and flow to the extract outlet conduit. In some configurations, the diameter D of the filter 105 can be approximately 20% of the W of the interior 109 of the extraction unit 100. In some embodiments, the diameter D of the filter is substantially equal to the diameter D of the outlet. Nevertheless, the diameter D of the filter 105 can also be changed to adapt to the desired extraction characteristics. For example, in some configurations, the diameter of the filter 105 can be increased to reduce the back pressure applied to the contents of the extraction unit. As an alternative, in some configurations, the diameter D of the filter 105 can be reduced to slow down the rate at which the extract can be displaced from the interior 109 of the extraction unit 100. The diameter of the filter 105 can be changed individually. However, in some configurations, the diameter of the filter 105 can be changed in combination with a corresponding change in the outlet diameter. For example, in some configurations, the diameter D of the outlet and the filter 105 can have a diameter that is substantially equal or equal to the diameter of the interior 109 of the extraction unit 100. In such an embodiment, the ratio of the diameter D of the outlet and the filter to the unit diameter is about 1:1. However, a changed configuration can be implemented. For example, in some configurations, the diameter D of the outlet and the filter diameter can both be about 10% to about 100% of the unit inner diameter, and in some configurations, about 10% to about 30% of the unit inner diameter. Similarly, the position of the filter 105 relative to the second part 106 can be variable. For example, the filter 105 can be arranged to be substantially centered on the second part 106. In an alternative embodiment, the filter 105 can be offset so that the periphery of the filter intersects with the center of the second part 106.

[0026] In addition, the interior 109 of the extraction unit 100 can be equipped with one or more sensors to monitor the internal characteristics of the extraction unit 100. For example, in some configurations, the interior 109 of the extraction unit 100 can include a temperature sensor that allows a user to monitor the temperature of the contents residing in the interior 109 of the extraction unit 100. In addition, in some configurations, it may be advantageous to arrange a plurality of pressure sensors in the interior 109 of the extraction unit 100 so that the internal pressure can be monitored. In some configurations, one or more sensors can be coupled to a controller to automate certain aspects of the extraction. For example, in some configurations, a pressure sensor can be arranged in the extraction unit 100 and communicatively coupled to the controller. In this way, the pressure in the extraction unit 100 can be monitored when the unit is filled with the extraction medium. Once the desired pressure is established in the extraction unit 100, the controller can close the inlet valve 111, thereby stopping the flow of the extraction medium into the interior 109 of the extraction unit 100. As described herein, in some embodiments, the flow into and out of the extraction unit 100 can be controlled manually and / or semi-manually.

[0027] Return to reference Figure 1 , the extraction slurry can be allowed to soak within the interior 109 of the extraction unit 100. In this way, the desired compounds of the material to be extracted from the extraction material can be introduced into the extraction medium and dissolved to form an extract. When the soaking is completed, the inlet valve 111 can be actuated to initiate a second flow of the extraction medium into the interior 109 of the extraction unit 100. As will be discussed in more detail below, when the outlet valve 112 is actuated and configured to receive the extract flow from the interior 109 of the extraction unit, the second flow of the extraction medium can displace the extract through the outlet 107. The embodiments and / or components of the extraction unit 100 can be similar to, for example, those described with respect to FIG. 2A to FIG. 2E The methods described below are used in combination. In addition, embodiments and / or components of the extraction unit 100 may be used to produce a cold extract according to the embodiments described below.

[0028] Exemplary Extraction Methods

[0029] FIG. 2A to FIG. 2E An embodiment of an upflow filtration process utilized in an extraction unit as described above is schematically shown.The extraction unit may be constructed according to any of the embodiments described above and herein. FIG. 2A to FIG. 2EComponents of the extraction unit 200 in have been given similar reference numerals as those of the extraction unit 100 described above, with similar components being replaced with "2" as described above. For example, in certain embodiments, the interior 209 may correspond to the interior 109 in the embodiments disclosed above. Additional details and embodiments of such components with similar reference numerals may be found with reference to the above description. For ease of presentation, the following method is discussed in the context of preparing cold-extracted coffee or tea from roasted ground coffee beans and loose leaf tea in packaged tea clumps. However, it will be apparent to one skilled in the art that the method may be employed to prepare a variety of different brews, including tea and various other brews. As described above, the process may include using an extraction medium (also referred to herein as a solvent) that does not exceed 100°C, and not using pressures exceeding several tens of atmospheres. For example, in certain configurations described below, the extraction medium may be between about 0°C and about 100°C. In some embodiments, the temperature of the extraction medium may be between about 10°C and about 30°C. In certain embodiments, the pressure within the extraction chamber is between about 0 bar(g) and 16 bar(g). In some configurations, the pressure is between about 0.8 bar(g) and 3 bar(g). In some configurations, the above temperature and pressure ranges can be combined. In some implementations, the extraction medium can be a liquid, such as water, but in some implementations, the extraction medium can be other liquids. In other configurations, certain inert gases can also be used to displace the extraction medium. In some implementations, as described below, the extraction medium is at ambient temperature when added to the extraction unit.

[0030] like Figure 2AAs shown, extraction material 221 (which may be roasted and ground coffee beans) may be loaded into interior 209 of extraction unit 200. Extraction material 221 may be added until interior 209 of extraction unit 200 is partially or substantially completely filled. As described above, extraction material 221 may vary widely in the context of the present disclosure. For example, in some configurations, extraction material 221 may include coffee beans, such as roasted and ground coffee beans. In addition, the grinding level may also affect the extraction characteristics. For example, in some configurations, when finely ground coffee beans are used, the extraction process proceeds faster. Alternatively, in the case of coarser grinding, the extraction rate may be slowed down. In some embodiments, coffee beans may be ground into an average particle size of about 0.5 mm to about 3 mm. For example, in some configurations, coffee beans may be ground into an average particle size of about 1 mm to about 2 mm. In yet further embodiments, ground coffee beans may be ground into an average particle size of about 1.2 mm to 1.7 mm. In some configurations, beans may be ground into an average particle size of about 1.3 mm. However, additional or alternative extraction materials may also be used. For example, in certain configurations, the fruits, leaves, roots and / or bark of other plants and herbs may be extracted.

[0031] Figure 2B An exemplary extraction unit 100 is depicted as being substantially completely filled with extraction material 221. After the extraction material 221 is loaded into the extraction unit 200, a first aliquot 231 of extraction medium may be introduced, such as Figure 2C As with the extraction material 221, a variety of potential extraction media may be employed. For ease of presentation, the present disclosure frequently refers to the use of water as the extraction medium, although it will be apparent to one skilled in the art that additional or alternative extraction media, such as gases, may be used in the methods disclosed herein.

[0032] Figure 2C A first aliquot of extraction medium 231 is depicted flowing through first portion 203 into interior 209 of extraction unit 200. In some embodiments, the extraction medium can be water. As described above, in some embodiments, the extraction medium (which can be water) does not exceed 100°C, and in some configurations, the extraction medium can be between about 0°C and about 100°C, and in some embodiments, the temperature of the extraction medium can be between about 10°C and about 30°C. Figure 2C As shown, a first aliquot 231 of extraction medium flows from the inlet conduit 201, through the inlet 202 and into the interior 209 of the extraction unit 200. In the arrangement shown, the first aliquot 231 of extraction medium flows generally upwardly into the interior 209 of the extraction unit 200, first penetrating the lowermost layer of extraction material 221, and then traveling vertically throughout the entire extraction unit 200.

[0033] As the first aliquot 231 of extraction medium flows into the interior 209 of the extraction cell 200, the extraction material 221 of the extraction cell 200 may be squeezed toward the second portion 206. This includes the extraction material to be extracted as well as any gas residing within the interior 209 of the extraction cell 200. In some embodiments, the outlet 207 may be opened so that the upward flow of extraction medium expels gas (e.g., air) residing in the extraction cell 200 through the second portion 206, via the outlet 207, and toward the air conduit 213. Once sufficient air has been evacuated from the extraction cell 200, the outlet 207 may be closed.

[0034] Once outlet 207 is closed, the flow of extraction medium may be stopped, or allowed to continue for a period of time. The pressure within interior 209 of extraction cell 200 may be related to the amount of time that the flow of extraction medium is allowed to continue after outlet 207 has been closed. The longer the flow of extraction medium is allowed to continue, the greater the pressure within interior 209 of extraction cell 200 will be, and the faster the extraction will proceed. Conversely, to achieve a more sophisticated extraction, outlet 207 may be closed when the water flow is stopped, so that the contents of extraction cell 200 are maintained at approximately atmospheric pressure.

[0035] In addition to displacing stagnant air, the upward flow of extraction medium can also provide certain advantages. First, the upward flow of extraction medium can more evenly wet the extraction material 221 in the extraction unit 200. Uniform wetting of the extraction material 221 can promote uniform extraction, thereby preventing over-extraction of some areas of the extraction material 221 while other areas remain under-extracted.

[0036] Secondly, the upward flow of extraction material 221 can tamp the extraction material 221 against the second portion 206 of the interior 209 of the extraction unit 200. In this way, an efficient and autonomous extraction is facilitated by eliminating the need for additional tamping components or user intervention. Since the upward flow of extraction material 221 provides the necessary tamping force, the extraction process can be started unattended, without the need for a user to stand by and tamp the coffee grounds after loading the coffee grounds into the extraction unit or after the extraction solvent has been introduced. Furthermore, the extent to which the grounds are tamped can be controlled by adjusting the amount of solvent introduced into the extraction unit and the internal pressure caused thereby.

[0037] Third, tamping the extraction material 221 against the second portion 206 can help to extract uniformly. Since the extraction material 221 is tamped and compacted against the second portion 206 of the extraction unit 200, the risk of channeling is reduced. Channeling may occur when the gap spaces between the extraction materials 221 are irregular; when the extraction medium flows through the coffee extraction material 221, the extraction medium may be diverted to larger gap spaces. This phenomenon may lead to over-extraction of the extraction material 221 adjacent to the larger gap space and under-extraction of the extraction material 221 adjacent to the smaller gap space. In addition, such channeling inhibits the formation of piston flow by preventing or reducing the flow of the extraction medium from reaching or maintaining a substantially constant speed. In contrast, in the case of a uniform upward flow of the extraction medium, the extraction material 221 can be tamped against the second portion 206 of the extraction unit 200, thereby compressing the broken material into a cake. The compressed extraction material 221 exhibits a more uniform gap spacing, which is conducive to uniform extraction and produces an extract with a more refined flavor profile.

[0038] The user can control many aspects of the extraction process by tailoring the flow rate to suit a particular embodiment. For example, the internal pressure and the degree to which the extraction material 221 is compacted against the second portion 206 may depend on the rate at which the extraction medium is introduced into the interior 209 of the extraction unit 200.

[0039] In various embodiments, the flow rate is set to achieve piston flow. In the case of a given flow rate that is too high, the extraction solvent may use the irregularities in the interstitial space of the coffee grounds to form a channel through the cake. Such a channel may be associated with uneven extraction. Similarly, in the case of a flow rate that is too low, the speed of the solvent may not be enough to cause a piston flow. In this way, the desired flow rate may be affected by the geometry of the extraction unit and the contents residing therein. Therefore, in various configurations of the methods and devices described herein, the flow rate is metered relative to the volume of the first portionable portion of the extraction medium residing inside the extraction unit. For example, in some configurations, the flow rate can be configured to fill the available volume of the extraction unit within a time period of 3 minutes to 30 minutes. Similarly, the flow rate can be configured to replace about 30% to about 90% of the first portionable portion within a time period of about 3 minutes to 30 minutes. In an alternative configuration, the flow rate can be configured to replace about 90% of the volume of the first portionable portion within a time period of 5 minutes. In some configurations, the flow rate can be configured to replace about 30% to about 90% of the volume of the first portionable portion within a time period of about 5 minutes to about 30 minutes. However, various other flow rates may be implemented within the scope of the present disclosure.For example, in certain configurations, the flow rate may be configured such that about 60% to about 80% of the volume of the first aliquot of extraction medium is displaced within a period of about 15 minutes to about 20 minutes.

[0040] When the first aliquot 231 of water flows into the interior 209 of the extraction unit 200, an extraction slurry 235 is formed. Figure 2D An extraction slurry 235 residing within the extraction unit 200 is depicted. The extraction slurry 235 is generally a heterogeneous mixture comprising an extraction material to be extracted in a solution with an extraction medium. For example, in certain configurations, the extraction slurry may include roasted ground coffee beans in a solution with water. The strength of the resulting extract is affected by certain characteristics of the extraction slurry 235. For example, the ratio of roasted ground coffee beans to water can affect the final strength of the brewed extract. Similarly, the temperature of the extraction slurry 235 and the pressure at which the extraction slurry 235 is maintained both have similar effects on the final beverage characteristics, which will be discussed in more detail below.

[0041] like Figure 2D As shown, the extraction slurry 235 can be maintained in the interior 209 of the extraction unit 200 for soaking. The extraction slurry 235 can be soaked for a period of time ranging from about 1 minute to about 2 hours. For example, in some configurations, the extraction slurry 235 can be allowed to soak for about 30 minutes to 1 hour. In some embodiments, the extraction slurry 235 is soaked for about 45 minutes. However, the soaking time will vary greatly depending on the properties of the extracted material and the desired characteristics of the extract to be obtained. For example, in order to prepare a lighter brew, such as herbal tea, a shorter soaking time can be used. In addition, in order to prepare a beverage with a stronger and more delicious flavor, or in the case where the desired compound has poor solubility or is difficult to extract for other reasons, a longer soaking time can be used. In some embodiments, the pressure in the extraction chamber during the above-mentioned soaking time period can be between about 0 bar (g) and 16 bar (g). In some configurations, the pressure during the above-mentioned soaking time period can be between about 0.8 bar (g) and 3 bar (g). In certain embodiments, a vacuum may be introduced to reduce the internal pressure to below ambient pressure. For example, in certain configurations, the pressure during the soaking period may be between about -3 bar(g) and about 3 bar(g). Additionally, in certain embodiments, during the soaking period, the extraction slurry 235 does not exceed 100°C, and in certain configurations, the extraction slurry 235 is between about 0°C and about 100°C, and in some embodiments, the temperature of the extraction slurry 235 may be between about 10°C and about 30°C. Surprisingly, due to the geometry of the extraction unit and the upward flow filtration process described herein, a high proportion of the desired soluble compounds in the extraction material are drawn into the extraction medium, ultimately allowing the production of a high TDS extract even when a shorter extraction time (such as about 30 minutes) is employed without sacrificing yield.

[0042] Throughout the process, the extraction slurry 235 is typically maintained at a substantially constant temperature and pressure, although some variations are contemplated. For example, in some configurations, the first portionable portion 231 may have a temperature lower than ambient temperature. In such a configuration, the extraction unit may be maintained at a low temperature, or the temperature of the first portionable portion may be allowed to rise as it soaks in the extraction unit. In alternative embodiments, the temperature of the extraction slurry may decrease as the mixture soaks. In yet other embodiments, the temperature of the extraction slurry may increase as the mixture soaks. In some configurations, the temperature of the first portionable portion 231 may be from about 0°C to about 100°C. In some configurations, the temperature of the first portionable portion 231 may be from about 10°C to about 30°C.

[0043] Similarly, when soaking the extraction slurry 235, the pressure in the extraction unit is usually maintained until the soaking process is completed. For example, in some configurations, the first aliquot of water can be made to flow into the interior 209 of the extraction unit 200 until the internal pressure exceeds one atmosphere. Once the desired pressure is established, the inlet valve can be closed and the first flow can be stopped. Then when soaking the extraction slurry, the pressure in the extraction chamber can be maintained at a substantially constant level. In some embodiments, the pressure in the extraction chamber is between about 0 bar (g) and 16 bar (g). In some configurations, the pressure is between about 0.8 bar (g) and 3 bar (g).

[0044] After the extraction slurry has been soaked, the extract 241 can be removed from the extraction unit 200. Figure 2E As shown, the extract 241 can be displaced by flowing a second aliquot 232 of an extraction medium (which may be the same or different type of medium as used in the extraction step) into the interior 209 of the extraction unit 200. The second aliquot 232 of the extraction medium flows upward from the first portion 203, thereby displacing the contents of the extraction unit 200 upward toward the filter 205. The filter 205 is used to separate the heterogeneous extraction slurry 235 into its constituent parts: the soaked extract 241 and the spent extraction material 221. Specifically, the inlet valve 211 can be opened and the second aliquot 232 of the extraction slurry 235 is allowed to flow into the interior 209 of the extraction unit 200 via the inlet 200 through the inlet conduit 201.

[0045] In various configurations of the methods and devices described herein, the flow of the second portionable portion is metered relative to the volume of the first portionable portion of the extraction medium residing inside the extraction unit. Similarly, in some configurations, a given flow will depend on the size of the extraction unit, the particle size of the material to be extracted, the diameter of the filter, and the pore size of the filter. Therefore, in some configurations, the flow of the second portionable portion can be configured to replace about 30% of the first portionable portion in a time period of 30 minutes. In an alternative configuration, the flow can be configured to replace about 90% of the volume of the first portionable portion in a time period of 5 minutes. In certain embodiments, the flow of the second portionable portion can be configured to replace about 30% to about 90% of the first portionable portion in a time period of about 5 minutes to about 30 minutes. However, various other flows can be implemented within the scope of the present disclosure. For example, in some configurations, the flow can be configured to replace about 60% to about 80% of the volume of the first portionable portion of the extraction medium in a time period of about 15 minutes to about 20 minutes.

[0046] Due to the flow rate, the cylindrical nature of the illustrated embodiment of the extraction unit 200, and the back pressure caused by the outlet valve 212 and the filter 205, plug flow can be induced when the second aliquot 232 of extraction medium is introduced into the interior 209 of the extraction unit 200. As described above, plug flow is characterized by a substantially constant velocity across the radial profile of the extraction unit 200. The substantially constant velocity across the radial profile of the extraction unit prevents mixing of adjacent layers, particularly mixing between the second aliquot 235 of extraction medium and the steeped extract 241.

[0047] Displacing the extract 241 in this manner can improve efficiency because no additional equipment is required to remove the extract from the interior 209 of the extraction unit 200; the displacing extract only utilizes the inlet and outlet system previously used to introduce the extraction medium. Therefore, the soaked extract 241 can be discharged from the extraction unit 200 without excessive dilution, and no additional extraction procedures or components are required. Without redundant extraction conduits or mechanisms, the corresponding transfer losses can be reduced, thereby ensuring that a high extraction yield can be maintained.

[0048] Once the desired volume of extract 241 is collected, the extraction cycle is complete. In some embodiments, the cycle can be started again by soaking the extraction material in a second aliquot of water. In other embodiments, the extraction material is discarded and the extraction unit 200 is emptied so that the cycle can start over. The extract 241 can be a finished product that can be delivered to a consumer for consumption. According to some embodiments, after only a single pass through the extraction material 221, at least a portion of the extract 241 is delivered to a consumer for consumption. As described above, embodiments of the extraction method can be similar to those described above with respect to Figure 1 and Figure 3The extraction unit 100 described above is used in combination. FIG. 2A to FIG. 2E The described embodiments of the extraction method can be used to produce a cold extract according to the embodiments described below.

[0049] Although many of the embodiments disclosed above have been discussed with respect to the upward flow of the extraction solvent, as described above, in certain arrangements, the orientation of the extraction unit 100, 200 can be changed such that the orientation of the first portion 103, 203 and the second portion 106 are reversed or flipped so that the first portion 103, 203 is positioned above the second portion 106, 206 or is located at another position, such as positioning the extraction unit 100, 200 with its side facing downward so that the first portion 103, 203 and the second portion 106, 206 are at the same or nearly the same height.

[0050] For example, refer to FIG. 2A to FIG. 2E , in one embodiment, the extraction unit 200 can be inverted or flipped. In this arrangement, the second portion 206 and components associated with the second portion 206 will be positioned below the first portion 203 and components associated with the first portion 203. In this manner, the extraction medium can flow downwardly through the extraction material 221. The downward flow of the extraction medium can tamp the extraction material 221 against the second portion 206 of the extraction unit, which can be positioned below the first portion 203 as described above.

[0051] In other configurations, a substantially lateral flow of the extraction medium may be employed by arranging the first and second portions 203, 206 at the same height such that a substantially lateral flow of the extraction medium occurs in the extraction unit 200. Likewise, a second substantially lateral flow of the extraction material 221 may be initiated within the interior of the extraction unit 200 to discharge the prepared extract from the interior of the extraction unit 200 via the outlet 207 and the filter 205. Thus, it will be appreciated that the extraction medium may be configured to flow in any number of orientations without departing from the scope of the present disclosure.

[0052] Cold Extract

[0053] Preparing edible extracts can be a time-consuming process. The extraction process involves introducing the desired compounds contained in the material of interest into an extraction medium. The extract can be characterized by the concentration of the compounds dissolved in the extraction medium, typically measured as TDS (total dissolved solids). However, depending on the solubility of the desired compounds, the extraction process can typically take hours or even days. Thus, traditional methods use high temperatures to increase the extraction rate and reduce the time required to prepare a brewed beverage. However, high temperatures can increase the rate at which undesirable components are extracted from the plant material, which may impart off-flavors or other undesirable properties.

[0054] Although extraction can be performed at lower temperatures, such efforts often result in bland, watery extracts lacking the flavor and aroma of brewed beverages prepared according to traditional methods due to the presence of large amounts of uninfused water and low TDS content, and may also require large amounts of extraction material, resulting in poor yields. For example, traditional hot espresso prepared at high temperatures and pressures exhibits a TDS content of about 50 g / L to 70 g / L, compared to cold brew products having a TDS content of about 20 g / L to 40 g / L.

[0055] Similarly, subjecting a material to multiple rounds of extraction in an attempt to increase TDS content or yield may be ineffective or lead to undesirable results. Yield is generally related to TDS according to Eq. 1.

[0056] Equation 1

[0057]

[0058] Given the above relationship, manufacturers may attempt to increase yield by repeatedly extracting the same mass of coffee beans, thereby increasing the total extract volume without increasing the mass of material extracted. As a result, the overall yield is artificially inflated.

[0059] In contrast, extracts produced according to some of the described embodiments can exhibit high TDS content and high yields without relying on high temperatures and extreme pressures, which tend to over-extract undesirable compounds. Specifically, the cold-extracted preparations described herein are surprisingly concentrated, exhibiting high TDS content without sacrificing overall yield. Furthermore, the high TDS content of the cold extracts prepared according to the present disclosure does not sacrifice yield, and does not require high temperatures or multiple rounds of extraction, which can result in off-flavors and undesirable properties.

[0060] For example, the upward flow process described herein allows the first portionable amount of the extraction medium to remain in substantially complete contact with the extraction material. In this way, the extraction is carried out efficiently, leaving almost no space for the residual extraction material to remain unsoaked. Therefore, the resulting extract contains more dissolved solids and less unsoaked extraction medium in the final product. When compared with traditional cold products, the lack of unsoaked extraction medium will produce a richer and more delicious flavor. Importantly, due to the limited amount of unsoaked extraction medium in the extract, and due to the stronger coffee flavor, high-concentration cold-extracted coffee and tea can be prepared by relying on the upward filtration cold extraction process described herein. In addition, due to the upward flow filtration and piston flow displacement process, high concentrations can be achieved without sacrificing total yield. Surprisingly, due to the high TDS content of the cold extract, the extract described herein can be added to a variety of beverages. For example, in certain configurations, the technology and methods described herein can be used to prepare beverages that can be consumed by themselves, or combined with additional beverage ingredients such as milk, water or juice to prepare cold-mixed American coffee, mocha coffee, latte coffee, cappuccino coffee, etc.

[0061] The techniques and methods described herein can be used to prepare cold extracts. For example, in some embodiments, the extraction material is ground roasted coffee having an average diameter of about 1 mm to about 2 mm. However, other extraction materials, such as loose leaf tea, can also be used. In some configurations, the cold brew extract can have a TDS of about 40 g / L to about 200 g / L. For example, in some configurations, using ground roasted coffee as the extraction material, the squeezed coffee extract has a TDS of about 60 g / L to about 120 g / L, and in some embodiments; the squeezed coffee extract has a TDS of about 80 g / L to about 120 g / L. In some embodiments, a cold extract having a TDS within the above range can be obtained during a cold extraction process, and can be obtained using other extraction materials such as loose leaf tea and other extraction materials described herein. In some embodiments, a cold extract having a TDS within the above range can be obtained in an extraction process using ground coffee beans having an average diameter between 1 mm and 2 mm. In addition, an extract having a TDS within the above range can be obtained in a process including a single pass of the extraction material. Surprisingly, this first-pass extract exhibits a high TDS and obtains an excellent yield. For example, an extract with a TDS in the above range can be obtained in the following process: including a single pass through the extraction material during a cold extraction process, thereby exhibiting a yield in the range of about 8% to about 14%. In some configurations, the yield can be in the range of about 10% to about 12%. In yet another embodiment, the prepared extract can be prepared using an extraction medium not exceeding 100°C, and in some configurations, the extraction medium can be between 0°C and 100°C, and in some configurations, the temperature of the extraction medium can be between 10°C and 30°C. In the aforementioned configuration, the extraction process can be carried out at a pressure between about 0bar(g) and about 16bar(g), and in some configurations, the pressure can be between about 0.8bar(g) and 3bar(g). In some implementations, the coffee used to produce the extract is maintained at a temperature below 50°C after roasting until the extract is replaced from the extraction unit. In yet another embodiment, after the coffee is introduced into the extraction unit, the extraction medium used to produce the extract is maintained at a pressure between about 0 bar (g) and 16 bar (g) until the extract is displaced from the extraction unit. In the above configuration, the coffee can be exposed to the extraction medium for a period of about 1 minute to about 2 hours, and in some embodiments for a period of about 30 minutes to 1 hour. Compared to traditional hot extraction, the cold extracts prepared according to the present disclosure can exhibit lower acidity, thereby having a sweeter, smoother flavor. In this way, these extracts are suitable for mixing in a variety of beverage bases. For example, in some configurations, the cold extracts prepared according to the present disclosure can be drunk alone, or mixed with additional beverages or ingredients such as milk, citrus, tea, and soda.In other configurations, the cold extract may be isolated and further processed or stored. For example, in some configurations, the cold extract may be delivered to a barrel for aging or storage. In some configurations, whiskey barrels made of oak or other suitable wood may be used for storage and aging.

[0062] TDS can be measured in a variety of ways. In certain configurations, the method of measurement may affect the target TDS content of a given extract. As used herein, TDS refers to the proportion of solids dissolved in a given volume of extract and is therefore expressed in mass / volume (usually g / L). Nonetheless, minor variations in method are contemplated, which may produce slightly different results. For example, in certain configurations, an approximation of TDS can be taken by measuring the refractive index of the extract using a refractometer to approximate the proportion of dissolved solids as a percentage that represents the proportion of dissolved solids in the total extract. Such variations remain within the scope of the present disclosure. As described above, with respect to FIG. 2A to FIG. 2E The embodiments of the extraction method described above can be used to produce the extracts described above. In addition, the embodiments of the extraction unit 200 described above can be used to produce the cold extracts according to the embodiments described above. In addition, in some embodiments, the extraction unit 200 and the FIG. 2A to FIG. 2E The described method embodiments can be used in combination to produce the extracts described above.

[0063] Extraction unit control system

[0064] In some configurations, the preparation of the extract as described above can be performed automatically, or can be performed substantially manually. In various configurations, one or more sensors can be arranged in or near the extraction unit to detect various characteristics of the extraction process. For example, such sensors can detect various characteristics, such as the temperature in the extraction unit, the temperature of the extraction unit itself, the pressure in the extraction unit, the volume of the extraction material in the extraction unit, the volume of the solvent in the extraction unit, the duration of the extraction, the rate of introducing the solvent via the inlet, the rate of removing the extract via the outlet, or other various characteristics.

[0065] Figure 4 A schematic diagram of an extraction unit equipped with multiple sensors, a pressure sensor 181 and a temperature sensor 182, is depicted. Each of the pressure sensor 181 and the temperature sensor 182 can be communicatively coupled to the controller 191. Likewise, the inlet valve 111 and the outlet valve 112 can also be communicatively coupled to the controller 191. In this way, each of the pressure sensor 181, the temperature sensor 191, the inlet valve 111, and the outlet valve 112 can relay information to the controller 191.

[0066] like Figure 4As shown, some embodiments of the controller 191 may include a display device, such as a screen 192. The screen 192 may display the aforementioned information collected from the pressure sensor 181, the temperature sensor 182, the inlet valve 111, and the outlet valve 112. For example, in Figure 4 In the illustrated embodiment, the controller can display information obtained from the temperature sensor, such as the temperature within the extraction cell. Similarly, the controller can display pressure, such as the pressure within the extraction cell. As described above, the inlet valve 111 and the outlet valve 112 can also relay relevant information to the controller 191 for display on the screen 192. In this way, the operator can view various extraction characteristics. Although in Figure 4 A screen is shown in , but alternative or additional display configurations may be employed, such as an analog meter or an alternative digital readout.

[0067] In some configurations, the controller may further include one or more dials. In this manner, the operator may affect various extraction characteristics. For example, in Figure 4 In the illustrated embodiment, the controller 191 includes a first dial 193 and a second dial 194. However, the dials may be implemented in a variety of numbers or forms. For example, in some configurations, the controller 191 may include one or more buttons or switches instead of the dials.

[0068] Continue to refer Figure 4 , the first dial 193 can be manipulated to control, for example, the outlet valve 112. Similarly, the second dial 194 can be manipulated to control, for example, the inlet valve 111. In this manner, an operator of the extraction cell 100 can manipulate the first dial 193 to open the outlet valve 112, and further manipulate the second dial 194 so that a flow of solvent is allowed to enter the interior 109 of the extraction cell 100. In this manner, as the solvent begins to fill the chamber, air or other gas residing in the extraction cell can exit the interior 109 of the extraction cell 100. In other embodiments, the first dial 193 can be manipulated so that when the solvent is introduced into the interior 109 of the extraction cell 100, the outlet valve 112 is closed, thereby allowing pressure to build up within the chamber.

[0069] In further embodiments, the controller 191 can be configured to automatically control certain extraction parameters. For example, in certain configurations, the controller 191 can be configured to receive information from at least one of the temperature sensor 181 and the pressure sensor 182 and automatically adjust the inlet valve 111 or the outlet valve 112 to control the temperature or pressure within the interior 109 of the extraction unit 100. In this manner, the extraction process can be substantially automated.

[0070] Certain terms

[0071] As used herein, the term "beverage" has its ordinary and customary meaning and includes, among other things, any edible liquid or substantially liquid substance or product having flowability (e.g., juice, coffee drinks, tea, milk, beer, wine, cocktails, liqueurs, spirits, cider, soft drinks, flavored waters, energy drinks, soups, broths, combinations thereof, etc.).

[0072] Unless otherwise specifically stated or otherwise understood in the context of use, conditional terms such as "can," "might," "likely," or "may" are generally intended to convey that certain embodiments include certain features, elements, and / or steps that other embodiments do not include. Thus, such conditional terms are generally not intended to imply that one or more embodiments require features, elements, and / or steps in any way, or that one or more embodiments necessarily include logic for determining whether such features, elements, and / or steps are included or to be performed in any particular embodiment, with or without user input or prompting.

[0073] Unless specifically stated otherwise, transitional language such as the phrase "at least one of X, Y, and Z" is understood to be commonly used in the context to convey that an item, term, etc. can be X, Y, or Z. Thus, such transitional language is generally not intended to imply that certain embodiments require the presence of at least one of X, at least one of Y, and at least one of Z.

[0074] Unless expressly stated otherwise, articles such as "a" or "an" should generally be construed to include one or more of the described items. Thus, phrases such as "a device configured to..." are intended to include one or more of the recited devices. Such one or more recited devices may also be collectively configured to perform the stated statements. For example, "a processor configured to perform statements A, B, and C" may include a first processor configured to perform statement A working in conjunction with a second processor configured to perform statements B and C.

[0075] The terms "comprises," "comprising," "having," and the like are synonymous and are used inclusively in an open manner and do not exclude additional elements, features, actions, operations, and the like. Likewise, the terms "some," "certain," and the like are synonymous and are used in an open manner. Also, the term "or" is used in its inclusive sense (rather than in its exclusive sense), such that when used, for example, to connect a list of elements, the term "or" means one, some, or all of the elements in the list.

[0076] As used herein, the terms "approximately," "about," and "substantially" refer to an amount that is close to the stated amount and still performs the desired function or achieves the desired result. For example, in some embodiments, as indicated by the context, the terms "approximately," "about," and "substantially" may refer to an amount that is less than or equal to 10% of the stated amount. Numbers following terms such as "about" or "approximately" include the stated numbers and should be interpreted based on the circumstances (e.g., as accurately as reasonably possible in the circumstances). For example, "about 1 gram" includes "1 gram." In the embodiments described in the present application, terms such as "about" or "approximately" before a value or range in the specification or claims may be omitted, such that the present application specifically includes embodiments of such values ​​or ranges when the terms "about" or "approximately" have been omitted from the stated values ​​and ranges, so that these values ​​and ranges may also be protected without the terms "about" or "approximately" preceding the disclosed ranges. That is, the present application specifically includes embodiments of values ​​and ranges associated with, for example, TDS, extraction medium temperature, soaking pressure, soaking time, diameter, yield, and flow rate, both with and without "about" or "approximately" associated with the disclosed values ​​and ranges. Thus, for example, a disclosed range between "about 0°C to about 100°C" would include a disclosed range between "0°C and 100°C", which could be considered to be between "0°C and 100°C". As used herein, the term "generally" means a value, amount, or characteristic that primarily includes or tends toward a particular value, amount, or characteristic. As an example, in certain embodiments, as indicated by the context, the term "substantially parallel" may refer to something that deviates from exact parallelism by less than or equal to 20 degrees and / or the term "substantially perpendicular" may refer to something that deviates from exact perpendicularity by less than or equal to 20 degrees.

[0077] In general, the language of the claims is to be interpreted broadly based on the language used in the claims. The language of the claims is not limited to the non-exclusive embodiments and examples shown and described in the present disclosure or discussed during the prosecution of the application.

[0078] The following exemplary embodiments identify some possible permutations of the combinations of features disclosed herein, although other permutations of the combinations of features are possible.

[0079] In a first embodiment of the present disclosure, a method for preparing an extract is described, the method comprising: loading an extraction material into an extraction unit having a bottom portion and a top portion; introducing a first aliquot of an extraction medium through the bottom portion of the extraction unit; exhausting gas from the extraction unit through the top portion of the extraction unit; closing the top portion of the extraction unit and increasing the pressure in the extraction unit as the extraction medium flows into the bottom portion of the extraction unit; stopping the flow of the extraction medium into the extraction unit; soaking the extraction material in the extraction medium under pressure to produce an extract; and introducing a second aliquot of the extraction medium through the bottom portion of the extraction unit to push the extract through the top portion of the extraction unit.

[0080] In a second embodiment of the present disclosure, an extraction unit for preparing an extract is described, the extraction unit comprising: a bottom portion; a top portion having a cross-sectional area; a side wall extending between the bottom portion and the bottom portion; an inlet located on the bottom portion and used to introduce an extraction medium; an outlet arranged on the top portion and used to remove the extract from the extraction unit, the area of ​​the outlet being between about 10% and about 100% of the cross-sectional area of ​​the top portion of the extraction unit; and a filter positioned at the outlet and having an average pore size between about 0.05 mm and about 0.35 mm.

[0081] In a third embodiment of the present disclosure, a cold extracted coffee and / or tea extract is described, comprising a TDS between about 60 g / L and about 120 g / L, wherein the extraction medium used to produce the extract is maintained at a temperature below about 30°C until the extract is displaced from the extraction unit.

[0082] Any of the first, second or third embodiments described above may be implemented individually or in combination with each other. Some minor variations of the foregoing are also contemplated. For example, in combination with the foregoing embodiments, or in yet further embodiments, the extraction material may include ground roasted coffee beans or loose leaf tea. The average diameter of the ground coffee beans is between 1 mm and 2 mm.

[0083] Likewise, according to any of the aforementioned first, second or third embodiments, the TDS of the extract can be in the range of about 40 g / L to about 140 g / L. For example, in some configurations, the TDS of the extract is about 80 g / L to about 120 g / L. In the same or different embodiments or configurations, the yield of the extract can be between about 8% to about 16%. In some embodiments described herein, TDS is related to yield. For example, in some configurations, the TDS of the extract is between about 80 g / L to 10 g / L, and the yield is between about 8% to about 14%.

[0084] According to any of the foregoing embodiments, the extraction medium may further have a temperature of no more than 100°C, and in some configurations, the extraction medium may be between 0°C and 100°C, and in some configurations, the extraction medium may be between 10°C and 30°C. According to any of the foregoing embodiments, the extraction material may be allowed to soak in the extraction medium under pressure, and the pressure maintained within the extraction unit is between about 0 bar(g) and about 16 bar(g). For example, according to any of the foregoing embodiments, after the extraction medium is introduced into the extraction unit, the coffee or tea used to produce the extract is maintained at a pressure between about 0 bar(g) and about 16 bar(g) until the extract is displaced from the extraction unit, and in some embodiments, the pressure may be between about 0.8 bar(g) and 3 bar(g). In the same or different embodiments, the extraction material may be allowed to soak for between about 30 minutes and about 20 hours, such as between about 30 minutes and 90 minutes. In some configurations, the coffee is exposed to the extraction medium for between about 45 minutes and 20 hours.

[0085] According to any of the foregoing embodiments, the extraction medium can be introduced via the bottom portion of the extraction unit, including introducing the extraction medium at a flow rate to achieve plug flow. For example, in some configurations, the second aliquot of the extraction medium is introduced at a rate such that about 30% to 90% of the first aliquot is displaced within a time period of about 5 minutes to 30 minutes.

[0086] According to any of the foregoing embodiments, the extraction medium can be introduced via the top portion of the extraction unit. In some configurations, the extraction medium can be introduced at a flow rate that achieves plug flow. For example, in some configurations, the second aliquot of the extraction medium is introduced at a rate such that about 30% to 90% of the first aliquot is displaced within a time period of about 5 minutes to 30 minutes.

[0087] Similarly, in various configurations, the extraction unit can be configured to receive a substantially horizontal flow of extraction medium. In one implementation, the substantially horizontal flow of extraction medium can be introduced at a flow rate that achieves plug flow. For example, in certain configurations, the second aliquot of extraction medium is introduced at a rate such that approximately 30% to 90% of the first aliquot is displaced within a period of approximately 5 minutes to 30 minutes.

[0088] In the same or different embodiment or any of the above embodiments, a portion of the extract can be delivered to the consumer without further extraction process on the portion of the extract. Likewise, in the same or different embodiment, the extraction material has not been previously extracted.

[0089] According to any of the foregoing embodiments, the filter of the extraction unit may have an average pore size of about 0.15 mm to about 0.35 mm.For example, according to any of the foregoing embodiments, the diameter of the fine filter is about 15% to 40% of the inner diameter of the upper part of the extraction unit.

[0090] Summarize

[0091] Although the present disclosure describes certain embodiments and examples of beverage systems and methods, many aspects of the above systems and methods can be combined and / or changed in different ways to form yet other embodiments or acceptable examples. All such changes and modifications are intended to be included within the scope of the present disclosure.

[0092] In addition, although there may be some embodiments within the scope of the present disclosure that are not explicitly described above or elsewhere herein, the present disclosure contemplates and includes all embodiments within the scope shown and described in the present disclosure. In addition, the present disclosure contemplates and includes the following embodiments: it includes any combination of any structure, material, step or other feature disclosed anywhere herein with any other structure, material, step or other feature disclosed anywhere herein.

[0093] Furthermore, certain features described in the context of separate implementations of the present disclosure may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented individually in multiple implementations or in any suitable sub-combination. Furthermore, although features may be described above as functioning in certain combinations, in some cases one or more features in the claimed combination may be excised from the combination, and the combination may be claimed as a sub-combination or a variation of a sub-combination.

[0094] For the purposes of the present disclosure, certain aspects, advantages and novel features are described herein. According to any particular embodiment, not all of these advantages may be achieved. Thus, for example, those skilled in the art will recognize that the present disclosure may be implemented or performed with the achievement of one advantage or a group of advantages taught herein, without necessarily achieving other advantages taught or suggested herein.

[0095] Some embodiments have been described in conjunction with the accompanying drawings. The drawings are drawn to scale, but such scale should not be construed as limiting. Distances, angles, etc. are merely exemplary and do not necessarily have an exact relationship to the actual size and layout of the device shown. Components may be added, deleted, and / or rearranged. In addition, the disclosure of any particular feature, aspect, method, characteristic, feature, quality, attribute, element, etc. herein in conjunction with the various embodiments may be used in all other embodiments set forth herein. Also, any method described herein may be practiced using any device suitable for performing the steps set forth.

[0096] In addition, although the components and operations may be depicted in the drawings or described in the specification in a specific arrangement or order, such components and operations do not need to be arranged and performed in the specific arrangement and order shown or in a sequential order, nor do they need to include all components and operations to achieve the desired result. Other components and operations that are not depicted or described may be incorporated into the embodiments and examples. For example, one or more additional operations may be performed before, after, simultaneously, or between any of the operations. In addition, in other implementations, operations may be rearranged or reordered. Also, the separation of various system components in the above implementations should not be understood as requiring such separation in all implementations, and it should be understood that the components and systems described may generally be integrated together in a single product or packaged into multiple products.

[0097] In summary, various illustrative embodiments and examples of beverage dispensing systems and methods have been disclosed. Although the systems and methods have been disclosed in the context of those embodiments and examples, the disclosure extends beyond the specifically disclosed embodiments to other alternative embodiments and / or other uses of the embodiments, as well as certain variations thereof and their equivalents. The disclosure expressly contemplates that the various features and aspects of the disclosed embodiments may be combined with or substituted for one another. Therefore, the scope of the disclosure should not be limited by the specifically disclosed embodiments described above, but should only be determined by a reasonable reading of the full scope of the appended claims and their equivalents.

[0098] Certain embodiments

[0099] Certain examples are listed below. The following examples are presented for explanation and illustrative purposes only. It should be appreciated that the foregoing description is not limited to the following examples. Example 1: A method of preparing an extract, the method comprising:

[0100] loading extraction material into an extraction unit having a bottom portion and a top portion;

[0101] introducing a first aliquot of extraction medium through a bottom portion of the extraction unit;

[0102] exhausting the gas from the extraction unit through a top portion of the extraction unit;

[0103] When the extraction medium flows into the bottom part of the extraction cell, closing the top part of the extraction cell and increasing the pressure in the extraction cell;

[0104] stopping the flow of extraction medium into the extraction unit;

[0105] soaking the extraction material in the extraction medium under pressure to produce an extract; and

[0106] A second aliquot of extraction medium is introduced via the bottom portion of the extraction unit to push the extract through the top portion of the extraction unit.

[0107] Embodiment 2: The method according to embodiment 1, wherein the extraction material comprises ground roasted coffee beans or loose leaf tea.

[0108] Embodiment 3: The method according to embodiment 2, wherein the ground coffee beans have an average diameter between 1 mm and 2 mm.

[0109] Embodiment 4: The method of embodiment 1, wherein the extract has a TDS of about 40 g / L to about 140 g / L.

[0110] Embodiment 5: The method of embodiment 1, wherein the extract has a TDS of about 80 g / L to about 120 g / L and a yield between about 8% and about 16%.

[0111] Embodiment 6: The method of embodiment 1, wherein the extraction medium is water at a temperature between about 10°C and about 30°C.

[0112] Embodiment 7: The method of embodiment 1, wherein the step of soaking the extraction material in the extraction medium under pressure maintains the pressure within the extraction unit between about 0 bar(g) and about 16 bar(g).

[0113] Embodiment 8: The method of embodiment 1, wherein the step of soaking the extraction material in the extraction medium under pressure comprises soaking for between about 30 minutes and about 20 hours.

[0114] Embodiment 9: The method of embodiment 1, wherein the step of soaking the extraction material in the extraction medium under pressure comprises soaking for between about 30 minutes and about 90 minutes.

[0115] Embodiment 10: The method of embodiment 1, wherein the step of introducing the extraction medium via the bottom portion of the extraction unit comprises introducing the extraction medium at a flow rate to achieve plug flow.

[0116] Embodiment 11: The method of embodiment 10, wherein the second aliquot of extraction medium is introduced at a rate such that about 30% to about 90% of the first aliquot is displaced within a period of about 5 minutes to about 30 minutes.

[0117] Embodiment 12: The method of embodiment 1, comprising delivering a portion of the extract to a consumer without subjecting the portion of the extract to further extraction processing.

[0118] Embodiment 13: The method of embodiment 1, wherein the extraction material has not been previously extracted.

[0119] Embodiment 14: An extraction unit for preparing an extract, the extraction unit comprising:

[0120] bottom part;

[0121] a top portion having a cross-sectional area;

[0122] a side wall extending between the base portion and the bottom portion;

[0123] an inlet located on the bottom portion and used to introduce an extraction medium;

[0124] an outlet disposed on the top portion and for removing the extract from the extraction unit, the area of ​​the outlet being between about 10% and about 100% of the cross-sectional area of ​​the top portion of the extraction unit; and

[0125] A filter is positioned at the outlet and has an average pore size between about 0.05 mm and about 0.35 mm.

[0126] Embodiment 15: The extraction unit of embodiment 9, wherein the filter has an average pore size between about 0.15 mm and about 0.35 mm.

[0127] Embodiment 16: The filter according to Embodiment 15, wherein the diameter of the fine filter is about 15% to 100% of the inner diameter of the upper portion of the extraction unit.

[0128] Example 17: A cold extracted coffee and / or tea extract comprising a TDS between about 60 g / L and about 120 g / L, wherein the extraction medium used to produce the extract is maintained at a temperature below about 30°C until the extract is displaced from the extraction unit.

[0129] Embodiment 18: The cold extracted coffee and / or tea extract according to claim 17, wherein the extract has a TDS between about 100 g / L and about 120 g / L and a yield between about 8% and about 14%.

[0130] Embodiment 19: The extract of embodiment 12, wherein, after the coffee used to produce the extract is introduced into the extraction unit, the coffee and / or tea is maintained at a pressure between about 0 bar(g) and about 16 bar(g) until the extract is displaced from the extraction unit.

[0131] Embodiment 20: The extract of embodiment 12, wherein the coffee is exposed to the extraction medium for between about 45 minutes and 20 hours.

[0132] Embodiment 21: A method for preparing an extract, the method comprising:

[0133] loading extraction material into an extraction unit having a bottom portion and a top portion;

[0134] introducing a first aliquot of extraction medium via a top portion of the extraction unit;

[0135] exhausting the gas from the extraction cell through a bottom portion of the extraction cell;

[0136] closing the bottom portion of the extraction cell and increasing the pressure in the extraction cell as the extraction medium flows from the top portion of the extraction cell into the bottom portion of the extraction cell;

[0137] stopping the flow of extraction medium into the extraction unit;

[0138] soaking the extraction material in the extraction medium under pressure to produce an extract; and

[0139] A second aliquot of extraction medium is introduced via the top portion of the extraction unit to push the extract through the bottom portion of the extraction unit.

[0140] Embodiment 21: A method for preparing an extract, the method comprising:

[0141] loading extraction material into an extraction cell having a first lateral portion and a second lateral portion;

[0142] introducing a first aliquot of extraction medium via a first lateral portion of the extraction unit;

[0143] exhausting gas from the extraction cell via a second lateral portion of the extraction cell;

[0144] closing the second lateral portion of the extraction cell and increasing the pressure in the extraction cell when the extraction medium flows from the first lateral portion of the extraction cell into the extraction cell;

[0145] stopping the flow of extraction medium into the extraction unit;

[0146] soaking the extraction material in the extraction medium under pressure to produce an extract; and

[0147] A second aliquot of extraction medium is introduced via the first lateral portion of the extraction unit to push the extract through the second lateral portion of the extraction unit.

Claims

1. A method for preparing an extract, the method comprising: loading extraction material into an extraction unit having a first portion and a second portion; introducing a first aliquot of extraction medium via the first portion of the extraction unit; exhausting gas from the extraction unit via the second portion of the extraction unit; When the extraction medium flows into the first part of the extraction unit, closing the second part of the extraction unit and increasing the pressure in the extraction unit; stopping the flow of the extraction medium into the extraction unit; soaking the extraction material in the extraction medium under pressure to produce an extract; as well as A second aliquot of the extraction medium is introduced via the first portion of the extraction unit to force the extract through the second portion of the extraction unit.

2. The method according to claim 1, wherein: The extraction material includes ground roasted coffee beans or loose leaf tea.

3. The method according to claim 1, wherein: The first portion is a bottom portion of the extraction unit and the second portion is a top portion of the extraction unit.

4. The method according to claim 1, wherein: The extract has a TDS of about 40 g / L to about 140 g / L and a yield between about 8% to about 16%.

5. The method according to claim 1, wherein: The extraction medium is water at a temperature between about 10°C and about 30°C.

6. The method according to claim 1, wherein: The step of soaking the extraction material in the extraction medium under pressure maintains a pressure within the extraction unit between about 0 bar(g) and about 16 bar(g).

7. The method according to claim 1, wherein: The step of soaking the extraction material in the extraction medium under pressure comprises soaking the extraction material in the extraction medium for between about 30 minutes to about 20 hours.

8. The method according to claim 1, wherein: The second aliquot of the extraction medium is introduced at a rate such that about 30% to about 90% of the first aliquot is displaced within a period of about 5 minutes to about 30 minutes.

9. An extraction unit for preparing an extract, the extraction unit comprising: Part I; a second portion having a cross-sectional area; a side wall extending between the second portion and the first portion; an inlet located on the first portion and used to introduce an extraction medium; an outlet disposed on the second portion and for removing the extract from the extraction unit, the outlet having an area between about 10% and about 100% of the cross-sectional area of ​​the second portion of the extraction unit; and A filter is positioned at the outlet and has an average pore size between about 0.05 mm and about 0.35 mm.

10. The extraction unit according to claim 9, wherein: The filter has an average pore size between about 0.15 mm and about 0.35 mm.

11. The extraction unit according to claim 9, wherein: The diameter of the filter is between about 15% and about 100% of the inner diameter of the upper portion of the extraction unit.

12. A cold extracted coffee and / or tea extract comprising a TDS between about 60 g / L and about 120 g / L, wherein: The extraction medium used to produce the extract is maintained at a temperature below about 30°C until the extract is displaced from the extraction unit.

13. The cold extracted coffee and / or tea extract according to claim 12, wherein The extract has a TDS between about 100 g / L and about 120 g / L and a yield between about 8% and about 14%.

14. The cold extracted coffee and / or tea extract according to claim 12, wherein After the coffee and / or tea used to produce the extract is introduced into the extraction unit, the coffee and / or tea is maintained at a pressure between about 0 bar(g) and about 16 bar(g) until the extract is displaced from the extraction unit.

15. The cold extracted coffee and / or tea extract according to claim 12, wherein: The coffee and / or tea used to produce the extract is exposed to the extraction medium for between about 45 minutes and 20 hours.

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