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WO2022025379A1 - Appareil d'extraction de café et son procédé de commande - Google Patents

Appareil d'extraction de café et son procédé de commande Download PDF

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Publication number
WO2022025379A1
WO2022025379A1 PCT/KR2021/002638 KR2021002638W WO2022025379A1 WO 2022025379 A1 WO2022025379 A1 WO 2022025379A1 KR 2021002638 W KR2021002638 W KR 2021002638W WO 2022025379 A1 WO2022025379 A1 WO 2022025379A1
Authority
WO
WIPO (PCT)
Prior art keywords
capsule
burr
grinding
gear
driver
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2021/002638
Other languages
English (en)
Inventor
Wonkyu Lee
Jungwon Lee
Jongkwan CHOI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of WO2022025379A1 publication Critical patent/WO2022025379A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/04—Coffee-making apparatus with rising pipes
    • A47J31/057—Coffee-making apparatus with rising pipes with water container separated from beverage container, the hot water passing the filter only once i.e. classical type of drip coffee makers
    • A47J31/0573—Coffee-making apparatus with rising pipes with water container separated from beverage container, the hot water passing the filter only once i.e. classical type of drip coffee makers with flow through heaters
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/40—Beverage-making apparatus with dispensing means for adding a measured quantity of ingredients, e.g. coffee, water, sugar, cocoa, milk, tea
    • A47J31/407—Beverage-making apparatus with dispensing means for adding a measured quantity of ingredients, e.g. coffee, water, sugar, cocoa, milk, tea with ingredient-containing cartridges; Cartridge-perforating means
    • 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
    • A47J31/42—Beverage-making apparatus with incorporated grinding or roasting means for coffee

Definitions

  • the present disclosure relates to a coffee extraction apparatus. More particularly, the present disclosure relates to a capsule opener for opening a capsule having whole beans stored therein.
  • a machine configured to extract espresso by applying pressure or centrifugal force to coffee powder, formed by grinding whole beans and provided in a capsule, according to a prescribed recipe (hereinafter referred to as a capsule coffee machine) or a machine configured to extract coffee in a dripping way (hereinafter referred to as a capsule drip machines) are widely sold.
  • a capsule coffee machine a machine configured to extract espresso by applying pressure or centrifugal force to coffee powder, formed by grinding whole beans and provided in a capsule, according to a prescribed recipe
  • a capsule drip machines a machine configured to extract coffee in a dripping way
  • the capsule coffee machine a determined amount of coffee powder obtained by grinding whole beans is contained in the capsule according to a recipe.
  • coffee may be extracted by applying pressure thereto or causing high-speed rotation while water of a certain temperature flows through the capsule.
  • the capsule drip machine is configured to make extracted coffee to flow out through a capsule outlet provided with a filter when water flows into a punctured capture and stays in the capture for a certain period of time.
  • U.S. Patent No. US10537202B2 discloses that coffee beans are stored in a pod, and that the pod is opened by punching, peeling or cutting, and then the coffee beans are sent to a grinder through a hopper so as to be ground. However, since the distance between the pod and the grinder is long, the beans may be contaminated in the hopper. Further, since the opening of the pod and the rotation of the grinder are performed by different drive units, the volume of the device may be large.
  • An object of the present disclosure is to maintain freshness for a long time by packaging a capsule containing whole beans instead of packing a capsule containing coffee powder obtained by grinding whole beans.
  • Another object of the present disclosure is to provide a capsule that is easy to separate and recycle because coffee powder does not remain inside the capsule after opening the capsule.
  • Another object of the present disclosure is to provide a simplified and compact coffee extraction apparatus by performing opening of a capsule and operation of a grinder for grinding of whole beans using the same driving source.
  • Another object of the present disclosure is to provide a coffee extraction apparatus including a capsule opener facilitating opening of a capsule having a film type cover.
  • the present disclosure is directed to a coffee extracting apparatus including a capsule punch and a punch lifter configured to open a capsule containing whole beans.
  • the capsule punch includes a blade. The blade may move to penetrate a film sealing an opening of the capsule body and rotate to make the film flap or flutter to ensure that the whole beans contained in the capsule are smoothly discharged to the outside.
  • a coffee extracting apparatus including a capsule mount allowing a capsule containing whole beans to be mounted thereon, a capsule opener configured to open the capsule and discharge the whole beans contained in the capsule, an opening gear part including a first opening gear configured to rotate the capsule opener, a grinder coupled to the capsule opener in a direction of discharge of the whole beans through the capsule opener to grind the whole beans discharged through the capsule opener, and a grinding gear part including a main grinding gear connected to a main grinding gear shaft configured to rotate the first opening gear, the grinding gear part being disposed under the opening gear part to rotate the grinder by the main grinding gear.
  • the capsule opener may include a driver part configured to open the capsule, and a driver rotating part configured to move the driver part toward a position of the capsule by rotation and to rotate the driver part to open the capsule to discharge the whole beans to the grinder.
  • the driver part may include a driver hub providing a center of rotation, a first blade part including a plurality of first blades configured to open the capsule, one end of each of the plurality of first blades being connected to the driver hub, a ring-shaped driver body configured to surround the driver hub, and a second blade part arranged under the first blade part to open the capsule together with the first blade part to guide the discharge of the whole beans contained in the capsule toward the grinder, the second blade part including a plurality of second blades connected between the driver hub and the driver body.
  • Each of the plurality of first blades may be inclined in a first direction, and each of the plurality of second blades may be inclined in a second direction opposite to the first direction.
  • Each of the plurality of first blades may be formed in a curved shape having a slope, the slope increasing in the first direction as a distance from the driver hub increases.
  • a vertical height of each of the plurality of first blades may increase as the distance from the driver hub increases.
  • an upper portion of each of the plurality of first blades adjacent to a free end of each of the plurality of first blades may pass through a portion of one surface of the capsule closing part corresponding thereto and be inserted into the capsule.
  • the driver part may further include a plurality of body protrusions formed on an outer circumferential surface of the driver body.
  • the driver rotating part may include a cylindrical rotating body opened at both ends and configured to rotate by rotational power transmitted from the opening gear part, the rotating body defining a driver installation space therein to accommodate the driver part, a capsule mount coupling hole arranged at one of the both ends of the rotating body and coupled to the capsule mount, a whole bean outlet positioned at an opposite one of the both ends of the rotating body to allow the whole beans discharged from the mounted capsule to be discharged toward the grinder therethrough, and a driver movement guide arranged between the driver part and the rotating body in the driver installation space and configured to rotate together with the rotating body to move and rotate the driver part.
  • the driver movement guide may include a ring-shaped movement ring body defining an exterior shape of the driver movement guide, a protruding movement thread arranged on an inner circumferential surface of the movement ring body and coupled to the body protrusions, and a movement stopper formed at one end of the protruding movement thread positioned close to the capsule mount coupling hole between both ends of the protruding movement thread to prevent the driver part from rising higher than a preset opening height.
  • the movement stopper may be formed in a shape of a protrusion bent from the one end of the protruding movement thread toward the capsule mount in an axial direction of the movement ring body.
  • the driver movement guide may further include a plurality of fixing protrusions provided on an outer circumferential surface of the movement ring body.
  • the rotating body may further include a plurality of inner fixing guides provided on an inner circumferential surface of the rotating body and corresponding to the plurality of fixing protrusions, wherein the plurality of fixing protrusions may be coupled to the plurality of inner fixing guides to rotate the rotating body and the driver movement guide simultaneously.
  • the rotating body may include a rotating ring gear formed in a gear tooth shape on an outer circumferential surface of the rotating body, wherein the rotating ring gear is engaged with the opening gear part to transmit rotational power of the opening gear part to the driver rotating part.
  • the capsule mount may include a circular mounting body defining an exterior shape of the capsule mount, a mounting recess formed by denting a portion of the mounting body in a shape corresponding to an exterior shape of the capsule, and a whole bean drop hole formed by penetrating a portion of the mounting recess in an axial direction of the capsule opener.
  • the capsule mount may further include a capsule protection cover rotatably coupled to the mounting body to protect the capsule or the mounting recess.
  • the capsule mount may include a circular mounting body defining an exterior shape of the capsule mount and coupled to the capsule mount coupling hole, a mounting recess formed by denting a portion of the mounting body in a shape corresponding to an exterior shape of the capsule, and a whole bean drop hole formed by penetrating a portion of the mounting recess in an axial direction of the capsule opener, wherein an outer diameter of the mounting body may be larger than a diameter of the rotating body.
  • a diameter of the whole bean drop hole may be larger than an outer diameter of the first blade part.
  • the coffee extraction apparatus may further include a protective frame configured to support the capsule opener, and a side protection body connected between the mounting body and the protective frame to protect a side surface of the capsule opener, wherein the side protection body may be formed of a light-transmitting material.
  • the capsule opener may include a driver part configured to open the capsule through rotation, and a driver rotating part configured to move the driver part toward a position of the capsule through rotation and to rotate the driver part to open the capsule and discharge the whole beans to the grinder, wherein the grinder may include a first burr configured to grind the whole beans discharged through the capsule opener, a first burr through-hole formed through the first burr in an axial direction, a first burr inlet disposed at one end of the first burr through-hole to allow the whole beans to be introduced therethrough, a first burr outlet disposed at an opposite end of the first burr through-hole to discharge ground whole beans as coffee powder, a second burr inserted into the first burr through-hole through the first burr outlet to define a grinding space for grinding of the whole beans together with the first burr, a grinding rotary part coupled to an outer surface of the first burr to rotate the first bur, and a grinding power part configured to generate rotational power for rotation of the grinding rotary part.
  • the main grinding gear shaft may be connected
  • the driver rotating part may include a cylindrical rotating body opened at both ends and configured to receive rotational power from the opening gear part, the rotating body defining a driver installation space therein to accommodate the driver part, and a rotating ring gear formed in a gear tooth shape on an outer circumferential surface of the rotating body, wherein the opening gear part may further include a second opening gear connected between the first opening gear and the rotating ring gear to rotate the rotating body.
  • a capsule containing whole beans is packed instead of a capsule containing coffee powder obtained by grinding whole beans, freshness may be maintained for a long time.
  • coffee powder does not remain inside the capsule. Accordingly, it may be easy to separate and recycle the capture.
  • a simplified and compact coffee extraction apparatus may be provided.
  • opening a capsule having a film type cover may be facilitated.
  • FIG. 1 schematically shows an example of a coffee extraction apparatus.
  • FIG. 2(a) schematically illustrates the grinding principle of a grinder included in the coffee extraction apparatus.
  • FIG. 2(b) shows an example of the grinder included in the coffee extraction apparatus.
  • FIG. 3(a) shows the assembled form of a conical burr included in the grinder.
  • FIG. 3(b) shows an example of a first burr, which is an external burr of the conical burr.
  • FIG. 3(c) shows an example of a second burr, which is a center burr of the conical burr.
  • FIG. 4(a) is an exploded view of an example of the grinder included in the coffee extraction apparatus.
  • FIG. 4(b) shows an example of a second grinder and a guide coupled to each other.
  • FIG. 5(a) shows an example of a grinder assembly separated from a support assembly.
  • FIG. 5(b) shows an example of the second grinder coupled to or separated from the first grinder.
  • FIG. 5(c) shows a cross section of a guide and a rotating ring of a grinding adjustment rotary part.
  • FIG. 6(a) shows a protective body part and a capsule protection cover that form an outer shell to protect the capsule opener.
  • FIG. 6(b) is a cross-sectional view, taken along the plane indicated by S in FIG. 6(a).
  • FIG. 6(c) shows a mounting body of a capsule mount.
  • FIGS. 7(a) and 7(b) show a circular capsule and a cross section thereof.
  • FIGS. 7(c) and 7(d) show an angled capsule and a cross section thereof.
  • FIG. 8(a) is an exploded view of an exemplary capsule opener.
  • FIG. 8(b) shows an exemplary driver part.
  • FIG. 8(c) shows a view of the driver seen from above.
  • FIG. 9(a) shows that after a user mounts a capsule on the capsule mount, a plurality of first blades is inserted into the capsule through a capsule closing part.
  • FIG. 9(b) shows that the plurality of first blades is vertically moved to a maximum degree corresponding to a preset opening height and inserted into the capsule.
  • FIG.9(c) shows the height of the first blades at the initial stage of mounting the capsule, using the cross section in the height direction of FIG. 9(a).
  • FIG. 9(d) shows the height of the plurality of first blades inserted into the capsule to the maximum degree, using the cross section in the height direction of FIG. 9(b).
  • FIG. 10 is a flowchart illustrating an example of a control method of the capsule opener and the grinder.
  • the term "whole bean” refers to roasted coffee beans, not the raw coffee beans harvested from a coffee tree.
  • Roasted coffee beans may be divided into various types by the degree of roasting. For example, coffee ingredients of dark roasted coffee, which is obtained by roasting the beans for a long time, may dissolve in water more easily than those of light roasted coffee.
  • the term “whole bean” is used to refer to roasted coffee beans to be used for coffee extraction regardless of the degree of roasting.
  • coffee powder employed in the present specification is coffee powder of a preset size, which may be set differently according to preferences and types of beans.
  • coffee powder of a preset size is not coffee powder having a specific size, but coffee powder having a size that can be changed according to preferences and types of beans.
  • a first temperature represents the room temperature or lower temperature
  • a second temperature represents a temperature higher than the first temperature
  • a coffee extraction apparatus refers to an apparatus configured to extract coffee liquid by dissolving coffee ingredients in water after mixing ground beans, that is, coffee powder with water.
  • the coffee liquid refers to water containing coffee ingredients extracted from coffee powder using water. Accordingly, in this specification, extracting coffee liquid means making water containing coffee ingredients extracted from coffee powder using water.
  • coffee generally refers to coffee liquid. However, when coffee is used like coffee powder, it may refer to solid coffee.
  • the burr is a core part of a grinder that grinds whole beans and has two parts (an outer burr and a center burr) provided with blades for grinding of whole beans arranged to face each other to grind beans. One part is fixed and the other part rotates to grind the beans.
  • the supplied whole beans are ground using the blades of the outer burr located outside and the center burr located inside while a certain distance is maintained between the outer burr and the inner bur.
  • Flat burrs or conical burs are mainly used in cafes and homes except for factories where whole beans are ground on a large scale.
  • Both the flat burr and the conical burr grind beans grind beans using two blades engaging with each other, but they are distinguished form each other by the shapes thereof.
  • the flat burrs may be divided into a vertical burr and a horizontal burr according to the direction in which the rotation axis of the burr is arranged.
  • the center burrs are rotated by a driving unit located outside, and the outer burrs are fixed.
  • the ground beans or coffee powder
  • the ground beans are not all discharged through a ground discharge portion, but are scattered and unintentionally piled up on both sides of the housing.
  • a large area may be contaminated by coffee powder, and the accumulated coffee powder may be unsanitary and has a risk of being mixed with newly ground beans and discharged, which may degrade the taste.
  • the ground beans may be piled up, and it may be difficult to avoid contamination of a driving unit or a driving connection part configured to drive a vertical shaft because the driving unit or the driving connection part is arranged at a lower position. That is, in both the horizontal burr and the vertical burr, the entire interior of the housings a3 and b3 may be contaminated due to centrifugal force generated during grinding.
  • the conical burr which is widely employed for household use, may reduce contaminated areas through vertical fall in the direction of gravity.
  • the center burr is arranged to rotate and the outer burr is fixed. Accordingly, the driving unit for rotation of the center burr is disposed under the center burr. Accordingly, there is a very high possibility that the driving unit is contaminated by falling coffee powder.
  • the present disclosure describes a coffee extraction apparatus including a grinder that rotates the outer burr of the conical burr to minimize the grinding path and the contaminated area.
  • a coffee extraction apparatus 1000 includes a grinder 200 configured to grinding whole beans into coffee powder having a size less than or equal to a preset size, a filter (not shown) arranged under the grinder 200 to receive the coffee powder and extract coffee liquid by rotating the coffee powder with water, an extractor 600 including an accommodation part 610 allowing the filter to be inserted thereinto, the accommodation part 610 being configured to store the coffee liquid extracted through the filter or supplied water, a driving unit (not shown) coupled to the filter to rotate the filter, a support part 910 configured to support the grinder 200 and the extractor 600 from the outside of the grinder 200 and the extractor 600, and a water supplier 400 configured to supply water to the extractor 600.
  • the whole beans ground through the grinder 200 or the coffee powder may be accommodated in the extractor 600 through an extractor inlet 615 open toward the grinder 200. Then, the coffee powder may be mixed with water supplied through the water supplier 400 to extract the coffee liquid.
  • the coffee extraction apparatus 1000 may further include a whole bean supplier 100 configured to supply whole beans to the grinder, and a base 920 arranged to support the support part 910, the base 920 including a controller (not shown).
  • the whole bean supplier 100 may be manually opened by the user to supply whole beans, or may be configured in the form of a dispenser to store a lot of whole beans as to be dispensed several times, such that the whole beans are supplied to the grinder whenever necessary.
  • the whole bean supplier 100 may be provided in the form of a disposable whole bean storage capsule (not shown) containing whole beams enough to make a drink of coffee. Once the whole bean storage capsule is coupled to the whole bean supplier 100, the whole bean storage capsule may be automatically opened to discharge the whole beans to the grinder 200.
  • the whole bean supplier 100 may be provided in the form of a capsule opener 110 for taking out whole beans stored in the capsule.
  • the capsule opener 110 may have various embodiments depending on how the capsule is sealed. In the case where the capsule is sealed in the form of a film, a blade for tearing the film may be provided. In the case where the capsule is sealed in the form of a plastic lid, the plastic lid may be rotated and opened.
  • an identification device (not shown) containing the type of whole beans and the like may be attached to the bean storage capsule.
  • the identification device may contain the type of whole beans, the degree of roasting, and the date of roasting. After the identification is recognized, the degree of grinding in the grinder 200, the extraction time in the extractor, and the like may be adjusted.
  • whole beans may fall from the whole bean supplier 100, and the falling beans may be ground into coffee powder having a predetermined size or less by the grinder 200, and then accommodated in the filter provided in the extractor 600.
  • the grinder 200 grinds the supplied whole beans into coffee powder having a predetermined size or less.
  • the grinding degree may vary depending on the kind of coffee and the degree of extraction may vary. Accordingly, the grinding degree may be set differently according to the user's selection or the kind of coffee. This is because the taste of coffee liquid may depend on the grinding degree, the degree of roasting, and the temperature of water.
  • the grinding degree of whole beans refers to a surface area that may contact water. Accordingly, finely grinding beans may increase the surface area, and make it easier to extract compounds from coffee.
  • the grinder 200 should also reduce the impact when the whole beans are ground, and should be convenient to be cleaned at home.
  • the grinder may employ a conical burr (see FIG. 3(a)). Configuring the outer burr between the center burr and the outer burr of the conical burr to rotate may avoid positioning the driving unit in the drop zone of the coffee powder.
  • the extractor 600 may include a filter configured to receive coffee powder falling from the grinder 200 and an accommodation part 610 into which the filter is inserted.
  • the filter may rotate to rotate the coffee powder and supplied water to extract coffee liquid.
  • Water temperature may increase through rotation of the filter. This is because the random motion of water molecules increases due to the rotation of the filter. However, since the water temperature increases very slightly, it is safe to assume that a first temperature is constantly maintained.
  • the accommodation part 610 may store coffee liquid extracted through the filter or water which is at the first temperature.
  • the filter is made of a mesh material and thus allows water or coffee liquid to freely pass therethrough while not allowing solid coffee powder to pass therethrough. Accordingly, when the filter rotates, coffee powder, water, and coffee liquid will be rotated inside the filter, and water and coffee liquid will rotate between the outside of the filter and the accommodation part 610.
  • a coffee server 800 capable of storing the extracted coffee liquid may be provided under the extractor 600.
  • the coffee server 800 may be a pot having a kettle shape, or may have a typical cup shape.
  • the coffee server may store the discharged and dropping coffee liquid, or move the coffee liquid to another location through a discharge portion (not shown) provided to guide the coffee liquid to the outside.
  • the extraction types may be divided into cold brew and hot brew by the temperature of water used for extraction in the extractor 600.
  • the brewing type When water at the first temperature, which is less than or equal to the room temperature, is used, the brewing type may be cold brew. When water at a second temperature higher than the first temperature is used, the brewing type may be hot brew.
  • the extractor 600 may include a first extractor 6001 which uses water at the first temperature and a second extractor 6002 which uses water at the second temperature, and the user may detachably attach one of the extractors to the support part 910 according to a desired extraction method.
  • the first extractor 6001 uses water at the first temperature, it is used to make cold brewed coffee.
  • the second extractor 6002 having a different structure from the first extractor may be used.
  • the first extractor 6001 and the second extractor 6002 have similar structures to be coupled to the support part 910 and occupy similar spaces between the grinder 200 and the coffee server 800 in the coffee extraction apparatus 1000. Accordingly, they are replaceable with each other. Accordingly, the user may select the first extractor 6001 or the second extractor 6002 according to a desired extraction type.
  • the water at the first temperature or the water at the second temperature may be supplied through the water supplier 400.
  • the water supplier 400 may supply water of the first temperature or water of the second temperature to the first extractor 6001 or the second extractor 6002 through the water supply nozzle 410.
  • the water supplier 400 may receive water of the first temperature or water of the second temperature from an external water supply source.
  • the water supplier 400 may receive water of the first temperature through the external water supply source, heat the water using a heater (not shown), and then supply the water to the second extractor 6002.
  • the extractor including the above-described filter relates to the first extractor 6001, and the second extractor 6002 may use a paper filter instead of the filter in the accommodation part 610 to drip and extract water of the second temperature.
  • Water may not be supplied from an external water supply source, but may be pre-stored in a water supply tank (not shown) and then supplied through a water supply pipe connected to the water supply tank.
  • the extractor 600 may be fixed to the support part 910, which is provided on the side, by the support arm 690.
  • the base 920 may be obliquely or vertically coupled to the support part 910.
  • the base fixes the support part 910 and supports a load applied to the support part 910. That is, the whole bean supplier 100, the grinder 200, the water supplier 400, and the extractor 600 are directly or indirectly connected to the support part 910, causing an eccentric load. Accordingly, a bending moment, shear force, and torsion may be applied to the support part 910.
  • the base 920 may serve to fix and support the support part 910 so as to withstand the applied bending moment, shear force, and torsion.
  • a controller configured to control the coffee extraction apparatus 1000 may be included in the base 920.
  • the controller may controls each motor that may be used for the grinder 200, the whole bean supplier 100, the first extractor 6001, or the water supplier 400, and control the amount of water from the water supplier, opening/closing of the discharge portion 680, rotation of the grinder, and the grinding degree of the grinder.
  • the controller may be arranged in any other portion of the coffee extraction apparatus 1000.
  • a button or a display (not shown) for an inputting/outputting operation may be positioned on the base 920.
  • the first extractor 6001 is arranged under the grinder 200 to receive ground beans, that is, coffee powder, and mix the same with water to extract coffee liquid.
  • the first extractor 6001 may use water of a first temperature less than or equal to room temperature.
  • the first extractor 6001 may include an accommodation part 610 and a filter.
  • the filter may be arranged inside the accommodation part.
  • the filter may accommodate coffee powder that is ground and dropped through the grinder 200.
  • the coffee powder is mixed with supplied water and stirred through rotation of the filter to extract coffee liquid.
  • the filter may allow only water or the extracted coffee liquid to pass therethrough and may not allow coffee powder to pass therethrough. Accordingly, the coffee powder may be obstructed from moving to the accommodation part 610 by the filter. That is, most of the external appearance of the filter is made of a mesh-type material to perform filtering.
  • the accommodation part 610 provides a space for storing the extracted coffee liquid or water.
  • Water of the first temperature hereinafter, water having the first temperature is simply referred to as water unless otherwise specified
  • supplied through the water supplier 400 may be supplied to the accommodation part.
  • FIG. 2(a) schematically illustrates the grinding principle of a grinder included in the coffee extraction apparatus.
  • the grinder employs a conical burr, which has a simple structure and is suitable for home use. It generates less heat and lower noise during grinding, and maintains the flavor of coffee better than the flat burr.
  • the size of coffee powder for optimal coffee extraction may vary.
  • the finer the ground powder is the larger the surface area in contact with water.
  • the grinding degree for the optimum coffee may vary among the whole beans.
  • Taste of coffee is determined by many factors including freshness of coffee, temperature and type of water, and extraction method.
  • grinding is one of the most important factors in the coffee extraction process. Grinding is a process to increase the area for coffee extraction by grinding beans. This is because when coffee is extracted through grinding, various coffee ingredients can dissolve in water more easily, affecting the coffee flavor. Accordingly, the operation of changing the particle size of individual coffee powder grains, that is, coffee particles through grinding may be referred to as adjustment of the grinding degree.
  • a second burr 232 which will be described later, may be moved in the axial direction of the first burr to adjust the insertion depth thereof into the first burr through-hole 2313.
  • the grinding degree may be adjusted automatically rather than manually.
  • the controller may control the driving unit to adjust the grinding degree.
  • the controller may read a barcode attached to a capsule supplied to the coffee bean supplier or a near field communication (NFC) based communication chip, and automatically set an appropriate grinding degree.
  • NFC near field communication
  • the conical burr includes a first burr 231 positioned outside and a second burr 232 inserted into the first burr 231 to form, together with the first burr 231, a grinding space in which whole beans are ground.
  • the first burr 231 is fixed, and the second burr 232 rotates to grind the whole beans into coffee powder. This is because rotating the second burr 232 positioned inside makes it easy to align the rotation centers of the first burr 231 and the second burr 232.
  • this structure may cause the coffee powder to be accumulated on the driving unit because the driving unit, which is configured to drive the second burr 232 must be connected to the second burr 232. In this case, the accumulated coffee powder may cause contamination and malfunction of the driving unit.
  • the first burr 231 positioned outside may rotate and the second burr 232 may be fixed.
  • the coffee extraction apparatus 1000 also includes components for aligning the rotation centers of the first burr 231 and the second burr 232.
  • FIG. 2(b) shows an example of the grinder 200 in the coffee extraction apparatus 1000.
  • the grinder 200 may include a grinder assembly 210 configured to grind supplied whole beans, and a grinding drive unit 290 configured to support the grinder assembly 210 and drive the grinder assembly 210.
  • the grinder assembly 210 includes a first grinder 211 including the first burr 231 (see FIG. 3), and a second grinder 212 including the second burr 232 (see FIG. 3) inserted into the first burr 231, the second grinder 212 being coupled to the first grinder 211.
  • a first grinder inlet 2111 may be provided on the side from which whole beans are supplied to the first grinder 211, and thus the first grinder 211 may receive the whole beans and transfer the same to the first burr 231 positioned therein.
  • the first burr 231 and the second burr 232 may grind the supplied whole beans using blades and discharge the ground beans.
  • the first grinder 211 may include a first housing 241 defining an outer shape of the first grinder 211 and a second housing 242 coupled to the first housing 241.
  • the second grinder 212 may include the second burr 232 (see FIG. 3).
  • the first grinder 211 and the second grinder 212 may be coupled to each other when the second burr 232 is inserted into the first burr 231.
  • a support assembly 270 may be provided to support the grinder assembly 210 and transmit power to the grinder assembly 210.
  • the support assembly 270 may include a grinding drive unit 290 and a grinding adjustment drive unit 292 (see FIG. 4(a)), which transmit rotational power to the grinder assembly 210.
  • the grinding drive unit 290 may include a grinding gear part 2915 and a grinding power part 2911 configured to rotate the grinding gear part 2915.
  • the grinding adjustment drive unit 292 may include a grinding adjustment gear part 2925 (see FIG. 4(a)) and a grinding adjustment power part 2921 (see FIG. 4(a)) configured to transmit rotational power to the grinding adjustment gear part 2925 (see FIG. 4(a)).
  • a planetary gear part 2913 may be further provided between the grinding gear part 2915 and the grinding power part 2911.
  • the planetary gear part may be used to reduce the number of rotations of a motor provided in the grinding power part 2911 and increase torque.
  • the grinding power part 2911 and the planetary gear part 2913 may be arranged in an installation space 915 (see FIG. 1) provided inside the support part 910. That is, the support part 910 may be combined with the grinder 200, the water supplier 400, and the extractor 600 of the coffee extraction apparatus to support the same, and may arranged in the installation space 915 where even a device to internally generate and transmit power is installed.
  • the planetary gear part 2913 and the grinding power part 2911 are positioned on one side of the grinder 200 in the installation space 915.
  • the grinding power part 2911 and the planetary gear 2913 may be positioned close to the base 920 and transmit power to the whole bean supplier 100 and the grinder 200 through a power transmission shaft.
  • FIG. 2(b) shows an example in which a swing-type idle gear is employed for the grinding gear part 2915.
  • the idle gear refers a subordinate gear arranged to connect gears.
  • the grinding gear part 2915 may include a main grinding gear 2916 (see FIG. 4(a)) and a subordinate grinding gear 2917.
  • the subordinate grinding gear 2917 may be connected to a grinding rotary part 250 provided in the first grinder 211.
  • the grinding gear part may further include a gear connection arm 2918 configured to connect and support the main grinding gear 2916 (see FIG. 4(a)) and the subordinate grinding gear 2917, and an elastic member 2919 connected to the gear connection arm 2918 to provide elastic force.
  • the elastic member may be fitted onto a main grinding gear shaft 2916a, which is a rotational shaft of the main grinding gear, and then fixed to a gear fixing part 283, which supports the grinding gear part 2915, to provide restoring force to the gear connection arm 2918.
  • the main grinding gear may be connected to the main grinding gear shaft 2916a and thus connected to the grinding power part 2911 via the planetary gear part 2913 (see FIG. 4(a)).
  • the main grinding gear shaft 2916a is connected to the planetary gear part, and is only allowed to rotate in position.
  • the subordinate grinding gear 2917 which is connected to the main grinding gear 2916, may rotate while revolving around an axis.
  • a subordinate grinding gear shaft 2917a may be supported by the gear connection arm 2918 and serve to support rotation of the subordinate grinding gear 2917.
  • the subordinate grinding gear shaft 2917a may move in the circumferential direction of the main grinding gear 2916 while supporting the rotation of the subordinate grinding gear. That is, the subordinate grinding gear 2917 may revolve around the main grinding gear 2916.
  • the subordinate grinding gear 2917 and the gear connection arm 2918 may be rotated in a second rotation direction and connected to the grinding rotary part 250 (see FIG. 4(a)) to rotate the grinding rotary part in the first rotation direction.
  • the gear connection arm 2918 and the subordinate grinding gear 2917 may be rotated in the first rotation direction and separated from the grinding rotary part by the restoring force of the elastic member 2919.
  • the restoring force of the elastic member may be designed to be less than the rotational power of the main grinding gear 2916 that rotates the rotational shaft of the subordinate grinding gear or he gear connection arm.
  • the restoring force may be transmitted to the subordinate grinding gear through the gear connection arm in the opposite direction to separate the subordinate grinding gear from the grinding rotary part.
  • the subordinate grinding gear 2917 is always connected to the grinding rotary part when rotating.
  • the gear connection arm 2918 may freely rotate, and the rotational power of the main gear 2916 may keep the subordinate grinding gear 2917 connected to the grinding rotary part 250.
  • the impact transmitted from the grinding rotary part to the main grinding gear shaft 2916a or the grinding power part 2911 through the main grinding gear 2916 may be minimized, and accordingly the impact transmitted to the grinding gear part 2915, the planetary gear part 2913 and the grinding power part 2911 may be alleviated.
  • the subordinate grinding gear shaft 2917a may revolve around the main grinding gear shaft 2916a while being spaced apart from the main grinding gear shaft 2916a by a certain distance by the gear connection arm 2918.
  • the subordinate grinding gear 2917, the subordinate grinding gear shaft 2917a, and the gear connection arm 2918 may rotate in a second rotation direction opposite to the first direction.
  • the grinding power part 2911 may include a first motor, which is a drive motor.
  • the grinding power part 2911, the gear fixing part 283, a portion of the gear support 282, and a portion of the grinding gear part 2915 may be disposed in an installation space 915 provided inside the support part 910.
  • a portion of the gear support 282, a portion of the grinding gear part 2915, a grinder fixing part 281, and the grinder assembly 210 may be arranged outside the support part 910 and thus be exposed to the user.
  • the grinder assembly 210 may be coupled to a coupling space 2811 (see FIG. 4(a)) of the support assembly.
  • the grinder assembly 210 may further include a grinder fixing part 281 defining the coupling space to provide the coupling space for attachment/detachment of the first grinder 211, a gear support 282 coupled to a lateral surface of the grinder fixing part 281 to protect the planetary gear part 2913 (see FIG. 4(a)), and a gear fixing part 283 coupled to an upper portion of the gear support portion 282 to support the grinding gear part 2915.
  • the grinder fixing part 281, the gear support 282, and the gear fixing part 283 may be integrated with each other.
  • these elements may be formed as a single plastic item by injection molding.
  • they may be formed of a metal material by a press process, or may be formed into a single grinder case 280 by a method such as welding or riveting.
  • the direction of gravity is indicated by g.
  • the figures illustrates that the whole beans supplied through the first grinder inlet 2111 fall vertically by gravity
  • the first grinder inlet 2111 may not necessarily be arranged in the direction of gravity.
  • a separate device for dropping of the coffee powder may not be required.
  • the movement path of coffee powder from the grinder 200 to the extractor 600 may be straightened. This straightening may simplify and shorten the movement path of the coffee powder, thereby minimizing accumulation of coffee powder inside the grinder 200.
  • the grinding rotary part 250 (see FIG. 4(a)) that rotates the first burr 231 is not located in the movement area of coffee powder, and accordingly contamination of the grinding rotary part 250 may be minimized.
  • FIG. 3(a) shows the first burr 231 for grinding the whole beans, the second burr 232 inserted into the first burr 231, and a grinding space 238 formed when the first burr 231 and the second burr 232 coupled to each other.
  • the burrs are a kind of conical burrs. Unlike the conventional conical burr, the first burr 231 located on the outside rotates. On the other hand, after the second burr 232 is inserted into and coupled to the first burr, the second burr is allowed to move only in the axial direction of the first burr to adjust the grinding degree, and does not rotate. Adjusting the grinding degree refers to adjusting the size of the grinding space in order to adjust the size of ground coffee powder to a preset value.
  • the second burr 232 is formed in a conical shape. Accordingly, when the second burr 232 is inserted into the first burr 231 and moved along the first burr through-hole 2313, the separation distance between the first burr 231 and the second burr 232 may vary, and accordingly the size of the grinding space may be adjusted.
  • the first burr 231 may include a sharp blade for grinding whole beans provided on the inner circumferential surface of the first burr through-hole 2313. Accordingly, the first burr is referred to as an outer serrated burr.
  • the second burr 232 is formed in a conical shape and is thus referred to as a cone-shaped center burr.
  • the first burr 231 may include a first burr through-hole 2313 formed therethrough in an axial direction for rotation of the first burr 231, and a first burr inlet 2318 disposed at one end of the first burr through-hole to allow the whole beans to be introduced therethrough, and a first burr outlet 2319 disposed at an opposite end of the first burr through-hole to discharge ground whole beans as coffee powder.
  • the whole beans introduced through the first grinder inlet 2111 may be supplied through the first burr inlet 2318, ground in the grinding space, and then discharged through the first burr outlet 2319.
  • the shape or the cross-section of a portion of the outer surface of the first burr that is closer to the first burr inlet 2318 than the first burr outlet 2319 has an angled shape, but the shape or the cross-section of a portion of the outer surface of the first burr that is closer to the first burr outlet 2319 than the first burr inlet 2318 has a circular shape.
  • the first burr 231 may be coupled to the first rotary part 250 (see FIG. 4) at the side of the first burr inlet 2318 for rotation.
  • the reason why the shape or the cross-section of a portion of the outer surface of the first burr that is closer to the first burr inlet 2318 than the first burr outlet 2319 has an angled shape is to prevent a slip effect between the first rotary part 250 (see FIG. 4) and the first burr when the first burr is coupled to the first rotary part 250 (see FIG. 4).
  • the angled shape or the angled cross-section may include a curved line and a straight line.
  • the outer surface of the first burr outlet 2319 is rotatably inserted into a grinding adjustment rotary part 260 (see FIG. 4(a)), and thus has a circular cross section. Accordingly, the outer surface of the first burr outlet may be referred to as a first burr outer circumferential surface 2317.
  • the inner circumferential surface of the first burr through-hole 2313 may include a first burr inclined portion 2314 and a first burr blade 2316. A portion of the first burr through-hole close to the first burr inlet 2318 is provided with the first burr inclined portion 2314.
  • the first burr inclined portion may include a plurality of guide protrusions 2315 for guiding the whole beans.
  • the first burr inclined portion is inclined as it extends toward the first burr outlet 2319.
  • the plurality of guide protrusions 2315 may have a tapered shape such that the size of the first burr through-hole 2313 decreases as the first burr through-hole extends toward the first burr blade 2316. This configuration is intended to reduce the gap between the first burr 231 and the second burr 232 to allow whole beans to be ground as they pass through the grinding space one after another.
  • a first burr blade 2316 may be provided at the side of the first burr outlet 2319 to grind whole beans into coffee powder.
  • FIG. 3(c) shows the second burr 232, which is inserted into the first burr through-hole 2313 through the first burr outlet to define a grinding space for grinding whole beans together with the first burr 232.
  • the second burr 232 may include a second burr through-hole 2323 formed therethrough in the axial direction of the first burr, a second burr inclined portion 2324 formed on the outer circumferential surface of the second burr 232 to correspond to the first burr inclined portion 2314, a plurality of impellers 2325 corresponding to the plurality of guide protrusions 2315, and a second burr blade 2326 corresponding to the first burr blade 2316.
  • only one bean may be introduced into a space formed between one guide protrusion 2315 and an adjacent protrusion 2315 and between one impeller 2325 and an adjacent impeller 2325 by the guide protrusions 2315 and the impellers 2325 and may be ground into coffee powder by the first burr blade 2316 and the second burr blade 2326.
  • the size of the grinding space defined between the first burr 231 and the second burr 232 may be varied as the second burr 232 moves in the axial direction of the first burr 231. That is, the grinding degree may be adjusted.
  • the whole beans supplied and ground will be discharged as coffee powder having a size less than or equal to an expected size according to the grinding degree because the separation distance between the first burr 231 and the second burr 232 is fixed, that is, the size of the grinding space is fixed.
  • FIG. 4(a) is an exploded view of an example of the grinder 200.
  • the grinder 200 may include a grinder assembly 210 and a support assembly 270 configured to support the grinder assembly 210 and transmit power.
  • the grinder assembly 210 may include a first grinder 211 and a second grinder 212 coupled to the first grinder 211.
  • the first grinder 211 may include a first burr 231 configured to rotate, a first burr through-hole 2313 (see FIG. 3) formed through the first burr 231 in an axial direction, a first burr inlet 2318 (see FIG. 3) positioned at one end of the first burr through-hole 2313 to introduce the whole beans therethrough, and a first burr outlet 2319 (see FIG. 3) positioned at an opposite end of the first burr through-hole 2313 to grind the whole beans and discharge the same as coffee powder.
  • the second grinder 212 may include a second burr 232 inserted into the first burr through-hole 2313 through the first burr outlet 2319 to form a grinding space for grinding of whole beans together with the first burr 231, and a burr coupler 2122 configured to support the second burr and couple the second burr to the first grinder 211.
  • the burr coupler 2122 may be coupled to the first burr 231 in the axial direction of the first burr to support the second burr 232 and couple the second burr 232 to the first grinder 211.
  • the outer circumferential surface of the burr coupler 2122 may be provided with a burr coupler thread 2122a, and may thus be coupled to a grinding adjustment rotary part 260, which will be described later, through the burr coupler thread 2122a.
  • the second grinder 212 may further include a handle 2125 allowing a user to easily hold the burr coupler 2122.
  • the outer circumferential surface of the handle 2125 is processed to have bumps. Accordingly, when the handle is held by the user, it may prevent the slipping effect, and allow the user to transmit appropriate rotational force to the second grinder 212. Accordingly, the second burr 232 and the burr coupler 2122 may be rotated by the handle 2125 so as to be screwed to the grinding adjustment rotary part 260.
  • the first grinder 211 may further include a grinding rotary part 250 coupled to an outer surface of the first burr to rotate the first bur.
  • the grinding rotary part 250 may be coupled to a first burr outer surface 2312 (see FIG. 3) located at the first burr inlet 2318.
  • the grinding rotary part 250 may include a grinding rotary part through-hole 2501 formed therethrough in the axial direction of the first bur.
  • the grinding rotary part through-hole 2501 and the first burr inlet 2318 may communicate with each other.
  • gear teeth are formed along a grinding rotary part outer circumferential surface 250a, which is the outer circumferential surface of the grinding rotary part 250.
  • the grinding rotary part 250 may be connected to a grinding gear part 2915, which will be described later, through the gear teeth.
  • a gear such as the grinding rotary part may be referred to as a ring gear. This means that the outer circumferential surface of the ring having a through-hole formed in the axial direction has a gear shape.
  • the grinding rotary part 250 may have a diameter as large as to have a large rotational moment of inertia, and may be formed of a material having a large weight if necessary. Thereby, vibrations caused by impacts during grinding of whole beans may be reduced, and accordingly a uniform size of coffee powder may be obtained.
  • the second burr 232 may be inserted into the first burr 231 without any driving device and may be only allowed to slightly move in the axial direction of the first burr 231 to adjust the size of the grinding space to adjusting the grinding degree.
  • the driving device of the second burr 232 when coffee powder is discharged. Accordingly, the effects of easy cleaning and contamination prevention may be obtained.
  • the grinding rotary part 250 may be coupled to the first burr 231 and accommodated in the first housing. That is, the first grinder 211 may include a first housing 241 configured to accommodate the grinding rotary part 250.
  • the first housing 241 may include a housing body 2412 defining a space to accommodate the grinding rotary part 250, a first opening 2411a provided in the housing body 2412 and opened toward the extractor 600, a second opening 2411b provided in the housing body 2412 and arranged on a side opposite to the first opening 2411a.
  • the housing body 2412 has only a lateral surface, and openings may be formed in both one surface face of the housing body close to the extractor 600 and the opposite surface of the housing body on the side opposite to the one surface.
  • the first burr 231 and the grinding rotary part 250 may be introduced into the housing body 2412 through the second opening 2411b and be coupled to each other. In this case, the supplied whole beans will be discharged through the first opening 2411a via the grinding rotary part through-hole 2501, the first burr inlet 2318, and the first burr outlet 2319.
  • a second housing 242 may be coupled to the second opening 2411b.
  • the grinding rotary part 250 may be rotatably coupled to the second housing 242, and thus the second housing 242 may prevent the rotation center of the grinding rotary part 250 from shaking.
  • the first burr 231 does not have a shaft at the center of rotation, and the grinding rotary part 250 coupled to the outer surface of the first burr 231 rotates. Accordingly, it may be more difficult to maintain the center of rotation than when a rotational shaft is used.
  • the grinding space between the first burr 231 and the second burr 232 should be kept constant to produce coffee powder having a desired grinding degree. Therefore, it is very important to maintain a constant distance between the first burr 231 and the second burr 232 when the first burr 231 is rotated.
  • the first housing 241 and the second housing 242 may be coupled to each other to fix the position of the grinding rotary part 250.
  • the grinding rotary part 250 may further include a first burr fixing part 251 to couple the first burr 231 and the grinding rotary part 250.
  • the first burr fixing part 251 may be provided to the coupling portions of the grinding rotary part 250 and the first burr inlet 2318 to prevent the coffee powder from escaping through the gap, and allow the rotational power of the grinding rotary part to be transmitted to the first burr without slip.
  • a first bearing 2119a and a second bearing 2119b may be provided at both ends of the grinding rotary part 250.
  • the first bearing 2119a allows the grinding rotary part to rotate in the second housing, and the second bearing 2119b is accommodated in the first housing to allow the grinding rotary part 250 to rotate.
  • the first bearing 2119a and the second bearing 2119b include a first bearing through-hole 2119c and a second bearing through-hole (not shown) formed in the axial direction of the first burr. Accordingly, the coffee powder discharged through the grinding rotary part through-hole, the first burr inlet 2318 and the first burr outlet 2319 will not be interfered with by the first bearing 2119a and the second bearing 2119b.
  • the second housing 242 which is coupled to the first housing 241 and rotatably supporting the grinding rotary part 250, may include a whole bean introduction hole 2423 allowing whole beans to be introduced therethrough, and may further include a fixing shaft support 2421 configured to support the fixing shaft inserted into the whole bean introduction hole 2423.
  • the fixing shaft support 2421 may be supported by at least one reinforcing rib 2422 connecting the inner surface of the whole bean introduction hole 2423 to the fixing shaft support 2421.
  • the fixing shaft support 2421 may be coupled to a fixing shaft 2128 arranged through the second burr to support the second burr 232 so as not to shake when the first burr 231 rotates.
  • the fixing shaft support 2421 may include a fixing shaft coupling groove 2421a (see FIG. 5(b)) into which the fixing shaft 2128 is inserted toward the first burr inlet 2318.
  • the fixing shaft 2128 may be inserted into the fixing shaft coupling groove 2421a through the first burr through-hole 2313.
  • the fixing shaft 2128 inserted into the fixing shaft coupling groove 2421a may be moved within the fixing shaft coupling groove 2421a in the axial direction of the first burr 231. Thereby, the distance between the first burr 231 and the second burr 232 may be adjusted to adjust the grinding degree.
  • the first grinder 211 may further include a grinding adjustment rotary part 260 accommodated in the housing body 2412 so as to be arranged closer to the first opening 2411a than the grinding rotary part 250, the grinding adjustment rotary part being connected to the burr coupler 2122 to move the second burr 232 inserted into the first burr 231 in the axial direction of the first burr to adjust the size of the grinding space 238.
  • the grinding adjustment rotary part 260 may convert force causing rotational motion into movement in the axial direction of the first bur.
  • the grinding adjustment rotary part 260 may include elements capable of converting rotational motion into linear motion, such as a rack and a pinion or a bevel gear.
  • An example of the grinding adjustment rotary part 260 shown in FIG. 4(a) may include a ring-shaped rotating ring 261 configured to rotate, a rotating ring through-hole 2613 formed by penetrating the rotating ring 261 in the axial direction of the first burr 231, and a cylindrical guide 262 disposed in the rotating ring through-hole 2613, the cylindrical guide 262 having an accommodation space 2622 formed therein to be coupled to the burr coupler 2122.
  • the guide 262 may include accommodation space threads (not shown) formed on an inner circumferential surface of the guide 262. As the burr coupler 2122 has the burr coupler thread 2122a formed on the outer surface thereof, the burr coupler 2122 may be screwed to the guide 262.
  • the grinder assembly 210 may be coupled to the coupling space 2811 of the support assembly 270.
  • the support assembly 270 defining the coupling space 2811 may further include a grinder fixing part 281 providing an attachable coupling space for the first grinder 211, a gear support 282 coupled to a side surface of the grinder fixing part 281 to protect the planetary gear part 2913 (see FIG. 4(a)), and a gear fixing part 283 connected to an upper portion of the gear support 282 to support the grinding gear part 2915.
  • the grinder fixing part 281, the gear support 282, and the gear fixing part 283 may be integrated with one another.
  • these elements may be formed as a single plastic item by injection molding.
  • they may be formed of a metal material by a press process, or may be formed into a single grinder case 280 by a method such as welding or riveting.
  • the support assembly 270 may further include a grinding drive unit 290 configured to transmit driving force to the grinder assembly 210.
  • the grinding drive unit 290 may be installed in the installation space 915 (see FIG. 1) of the support part 910 (see FIG. 1) and thus may not be exposed to the outside.
  • the grinding drive unit 290 may include a grinding drive unit 290 configured to rotate the grinding rotary part 250 and a grinding adjustment drive unit 292 configured to drive the grinding adjustment rotary part 260.
  • the grinding drive unit 290 may include a grinding gear part 2915 connected to the grinding rotary part 250 to rotate the grinding rotary part 250, and a grinding power part 2911 configured to transmit rotational power to the grinding gear part.
  • a planetary gear part 2913 may be disposed between the grinding power part 2911 and the grinding gear part 2915 to transmit the rotation of the grinding power part 2911 to the grinding gear part 2915 after reducing the rotational speed of the grinding power part 2911 to an appropriate speed.
  • the grinding adjustment drive unit 292 may include a grinding adjustment gear part 2925 connected to the grinding adjustment rotary part 260 to rotate the grinding adjustment rotary part 260, and a grinding adjustment power part 2921 configured to transmit rotational power to the grinding adjustment gear part 2925.
  • the controller may be provided in the support 2421 (see FIG. 1) or the base 920 (see FIG. 1). However, this is merely an embodiment.
  • the controller may be arranged anywhere as long as the control can control the water supplier 400, the extractor 600, and the grinder 200 of the coffee extraction apparatus.
  • the controller will also control the whole bean supplier 100.
  • the controller independently controls the grinding power part 2911 and the grinding adjustment power part 2921 to control the grinder 200. That is, the rotation of the grinding gear part 2915 is independent from the rotation of the grinding adjustment gear part 2925.
  • the grinding gear part 2915 may rotate the grinding rotary part 250, thereby rotating the first burr 231. In other words, it serves to transmit the power required to grind whole beans.
  • the grinding adjustment gear part 2925 may rotate the grinding adjustment rotary part 260 to move the second grinder 212 in the axial direction of the first burr 231.
  • the second burr 232 may be finely adjusted inside the first burr 231 in the axial direction of the first burr 231 by rotation of the grinding adjustment rotary part 260 to adjust the grinding degree.
  • the grinding power part 2911 to transmit power to the grinding rotary part 250 may be larger than the grinding adjustment power part 2921.
  • the scale of the grinding power part 2911 means that the torque or power of a first motor provided in the grinding power part 2911 is greater than that of a second motor provided in the grinding adjustment power part 2921.
  • the grinding adjustment drive unit 292 may be arranged on a lateral surface of the grinding drive unit 290.
  • the grinding adjustment drive unit 292 may be fixed to a portion of the coupling space 2811 to rotate the grinding adjustment rotary part 260.
  • the grinding gear part 2915 may include a main grinding gear 2916 and a subordinate grinding gear 2917.
  • the subordinate grinding gear 2917 may be connected to the grinding rotary part 250 provided in the first grinder 211.
  • the grinding gear part may further include a gear connection arm 2918 configured to connect and support the main grinding gear 2916 and the subordinate grinding gear 2917, and an elastic member 2919 connected to the gear connection arm 2918 to provide elastic force.
  • the elastic member 2919 is may be fitted onto a main grinding gear shaft 2916a, which is a rotational shaft of the main grinding gear, and then fixed to the gear fixing part 283, which supports the grinding gear part 2915, to provide restoring force to the gear connection arm 2918.
  • the main grinding gear may be connected to the main grinding gear shaft 2916a and thus connected to the grinding power part 2911 via the planetary gear part 2913.
  • the main grinding gear shaft 2916a is connected to the planetary gear part 2913, and is only allowed to rotate in position.
  • the subordinate grinding gear 2917 which is connected to the main grinding gear 2916, may rotate while revolving around an axis.
  • a subordinate grinding gear shaft 2917a may be supported by the gear connection arm 2918 and serve to support rotation of the subordinate grinding gear 2917.
  • the subordinate grinding gear shaft 2917a may move in the circumferential direction of the main grinding gear 2916 while supporting the rotation of the subordinate grinding gear. That is, the subordinate grinding gear 2917 may revolve around the main grinding gear 2916.
  • the subordinate grinding gear 2917 and the gear connection arm 2918 may be rotated in a second rotation direction and connected to the grinding rotary part 250 to rotate the grinding rotary part in the first rotation direction.
  • the gear connection arm 2918 and the subordinate grinding gear 2917 may be rotated in the first rotation direction and separated from the grinding rotary part by the restoring force of the elastic member 2919 (see FIG. 2(b)).
  • the restoring force of the elastic member 2919 may be designed to be less than the rotational power of the main grinding gear 2916 that rotates the rotational shaft of the subordinate grinding gear or he gear connection arm.
  • the restoring force may be transmitted to the subordinate grinding gear through the gear connection arm in the opposite direction to separate the subordinate grinding gear from the grinding rotary part.
  • the elastic member 2919 may be a torsion spring coupled to the main grinding gear shaft 2916a and fixed to the gear fixing part 283.
  • the torsion spring is a spring that works by twisting its end along its axis; that is, a flexible elastic member that stores mechanical energy when the torsion spring is twisted. When the torsion spring is twisted, the torsion spring exerts a torque in the opposite direction, proportional to the amount (angle) the torsion spring is twisted.
  • Any element capable of connecting the subordinate grinding gear 2917 to the grinding rotary part when the main grinding gear 2916 rotates and separating the subordinate grinding gear 2917 from the grinding rotary part 250 when the main grinding gear 2916 stops may be provided in place of the elastic member. For example, the same function may be performed using an actuator in place of the elastic member.
  • the subordinate grinding gear 2917 is always connected to the grinding rotary part when rotating.
  • the gear connection arm 2918 may freely rotate, and the rotational power of the main grinding gear 2916 may keep the subordinate grinding gear 2917 connected to the grinding rotary part 250.
  • the impact transmitted from the grinding rotary part 250 to the main grinding gear shaft 2916a or the grinding power part 2911 through the main grinding gear 2916 may be minimized, and accordingly the impact transmitted to the grinding gear part 2915, the planetary gear part 2913 and the grinding power part 2911 may be alleviated.
  • the subordinate grinding gear shaft 2917a may revolve around the main grinding gear shaft 2916a while being spaced apart from the main grinding gear shaft 2916a by a specific distance by the gear connection arm 2918.
  • the subordinate grinding gear 2917, the subordinate grinding gear shaft 2917a, and the gear connection arm 2918 may rotate in a second rotation direction opposite to the first direction.
  • the first grinder 211 may further include a first housing 241 configured to accommodate the grinding rotary part 250 and support the grinding rotary part.
  • the first housing 241 may include a housing body 2412 defining a space to accommodate the grinding rotary part 250, a first opening 2411a provided in the housing body 2412 and opened at one end facing the extractor 600, a second opening provided in the housing body 2412 and opened an opposite end facing away from the extractor 600, a first communication hole 2413a formed through the housing body 2412 in a radial direction of the grinding rotary part 250, and a second communication hole 2413b formed through the housing body 2412 in a radial direction of the grinding adjustment rotary part 260.
  • the grinding rotary part 250 may be rotatably connected to the grinding gear part 2915 through the first communication hole 2413a.
  • the grinding adjustment rotary part 260 may be rotatably connected to the grinding adjustment gear part 2925 through the second communication hole 2413b.
  • the first communication hole 2413a is positioned at a different height from the second communication hole 2413b.
  • the grinding rotary part 250 and the grinding adjustment rotary part 260 are arranged at different heights.
  • the grinding adjustment drive unit 292 is arranged biased to one side of the coupling space 2811 (see FIG. 5(a)), and accordingly the radial direction of the grinding rotary part 250 provided with the first communication hole 2413a may differ from the radial direction of the grinding adjustment rotary part 260 provided with the communication hole 2413b.
  • a straight line formed by the first communication hole 2413a around the first burr, and a straight line formed by the second communication hole 2413b may form a certain angle.
  • the first communication hole 2413a and the second communication hole 2413b may be formed at different positions in the housing body 2412.
  • the sizes of the first communication hole 2413a and the second communication hole 2413b may also be different from each other.
  • the directions in which the first communication hole 2413a and the second communication hole 2413b faces the outside from the housing body may also be different from each other.
  • FIG. 4(b) shows an example of the second grinder 212 and the guide 262 coupled to each other.
  • the guide 262 may include a first through-hole 2601 and a second through-hole 2602 formed to define an accommodation space 2622 to accommodate a portion of the second grinder 212 and connected to the accommodation space 2622.
  • the first through-hole 2601 may be positioned on the side close to the first burr 231, and the second through-hole 2602 may be positioned on the side opposite to the first through-hole 2601.
  • a portion of the second grinder 212 may be inserted through the second through-hole 2602, and be inserted into the first burr 231 through the first through-hole 2601.
  • the inner circumferential surface of the guide 262 defining the accommodation space 2622 may be provided with an accommodation space thread 2262a having a thread shape to couple the burr coupler 2122 to the accommodation space 2622.
  • the outer circumferential surface of the burr coupler may also be provided with a burr coupler thread 2122a having a thread shape.
  • the burr coupler thread 2122a and the accommodation space thread 2262a may be screw-coupled to each other.
  • it is possible to separate by the screw coupling between the burr coupler thread 2122a and the accommodation space thread 2262a may be loosened to separate the guide from the burr coupler when the apparatus is not in use or needs to be cleaned.
  • the first grinder 211 and the second grinder 212 are separable from each other.
  • the first burr 231 and the second burr 232 are separable from each other.
  • the first grinder 211 and the burr coupler 2122 are separable from each other.
  • the first grinder 211 and the second burr 232 may be coupled when in use and may be separated when they are not in use or when they need to be cleaned. That is, the first grinder and the second burr 232 may be selectively separated.
  • the guide 262 may include a plurality of guide protrusions 2621 extending from one end thereof including the first through-hole 2601.
  • the plurality of guide protrusions 2621 may be provided on an arc including the first through-hole 2601 at constant intervals.
  • the guide protrusions 2621 may be provided as a single integrated guide protrusion.
  • the plurality of guide protrusions 2621 may couple the guide 262 to the rotating ring 261 through a rotating ring thread 2612a provided on the rotating ring inner circumferential surface 2612.
  • the guide protrusions 2621 may be provided with a protrusion stopper 2621a to reinforce the guide protrusions 2621 and prevent the guide from rotating.
  • the protrusion stopper 2621a has a rib shape extending from the guide protrusion 2621 toward the extractor 600.
  • the protrusion stopper 2621a may cause the rotating ring 261 to rotate.
  • the guide 262 which is screw-coupled to the inner circumferential surface of the rotating ring, may move in place in the axial direction of the first bur.
  • the second burr 232 may include a second burr through-hole 2323 formed through the second burr 232.
  • a fixing shaft 2128 may be coupled to the second burr through-hole 2323 in a penetrating manner.
  • the burr coupler 2122 which supports the second burr 232 and couples the second burr 232 to the first grinder, may be partially accommodated in the accommodation space 2622 together with the second burr 232.
  • the burr coupler 2122 may include an installation hole 2122c formed therethrough in the axial direction of the first burr.
  • the second burr 232 may be installed in the second burr installation hole 2122c.
  • the second burr 232 may further include a burr coupler support rib 2122b connected to the inner circumferential surface of the second burr installation hole 2122c to support the second burr 232.
  • the installation hole is provided because the coffee powder discharged through the first burr outlet falls into the accommodation space of the guide, and a portion of the coffee powder may be discharged to the extractor 600 through the installation hole 2122c.
  • the handle 2125 may also have a ring shape.
  • the movement path of the discharged coffee powder has only through-holes and some ribs, and therefore coffee powder accumulated in an area other than the extractor may be minimized.
  • the present disclosure is directed to a coffee extraction apparatus 1000 in which the path of the ground beans passing through the grinder 200 is simplified and minimized.
  • the grinder 200 employs a conical burr, allows the outer burr (the first bur), not the center burr, to rotate, and thus does not position the driving unit in the discharge area of the coffee powder.
  • the coffee powder may be discharged directly to the extractor 600 without interference because there is no driving device except multiple holes in the path through which the coffee powder is discharged. Accordingly, the coffee powder wasted or accumulated in the grinder 200 to cause contamination may be minimized.
  • the grinding adjustment drive unit 292 may include a grinding adjustment gear part 2925 and a grinding adjustment power part 2921.
  • a grinding adjustment gear shaft 2929 is rotated by rotation of the grinding adjustment power part 2921, a grinding adjustment gear 2927 coupled to the grinding adjustment gear shaft 2929 may rotate.
  • the grinding adjustment gear 2927 rotates, the rotating ring 261 of the grinding adjustment rotary part 260 will finally rotate.
  • the rotating ring 261 may include a rotating ring through-hole 2613 formed therethrough in a ring shape in the axial direction of the first burr.
  • Gear teeth may be provide on a rotating ring outer circumferential surface 2611, which is the outer circumferential surface of the rotating ring 261, at a position corresponding to the grinding adjustment gear 2927, and thus the rotating ring 261 may engage with the grinding adjustment gear 2927.
  • a rotating ring inner circumferential surface 2612 which is the inner circumferential surface of the rotating ring 261, may be provided with a rotating ring thread 2612a in the form of a screw thread, and thus the guide protrusion 2621 may be screwed thereto.
  • the rotating ring 261 and the guide 262 may be fixed by a plurality of grinding adjustment supports (not shown) and a plurality of guide fixing parts (not shown) extending from the housing body 2412, respectively.
  • the guide 262 may not rotate along the rotating ring thread 2612a, but may move in the axial direction of the first burr. Accordingly, using this operation, the distance between the first burr 231 and the second burr 232 may be adjusted, that is, the size of the grinding space may be adjusted to adjust the size of the ground coffee powder.
  • the grinding adjustment drive unit 292 may be coupled to one side of the coupling space 2811 through a driving coupler 2923 and a driving fastener 2924.
  • FIG. 5(a) shows the grinder assembly 210 separated from the support assembly 270. That is, when used, the grinder assembly 210 is coupled to the coupling space 2811. When it is not in use or needs to be cleaned, the grinder assembly 210 may be separated. After the separation, the first burr 231 and the second burr 232 may be exposed, respectively, and may thus be easily cleaned using a cleaning brush.
  • the grinder assembly 210 When the grinder assembly 210 is coupled to the coupling space 2811 defined in the grinder fixing part 281, it may be engaged with the gear teeth of the grinding gear part 2915, the grinding rotary part, the grinding adjustment gear part, and the grinding adjustment rotary part. To this end, the grinding rotary part 250 and the grinding adjustment rotary part 260 may be connected to the grinding gear part 2915 and the grinding adjustment gear part 2925 through the first communication hole 2413a and the second communication hole 2413b, respectively.
  • FIG. 5(b) shows the first grinder 211 and the second grinder 212 separated from each other.
  • the second grinder 212 may include a second burr 232, a burr coupler 2122 coupled to the second burr 232, a fixing shaft 2128 arranged through the second burr 232 and the burr coupler 2122 in the axial direction of the first burr, and a handle 2125 coupled to the burr coupler 2122 to provide a gripping portion.
  • the first grinder 211 may include a first burr 231, a grinding rotary part 250 configured to rotate the first burr, a first bearing 2119a and a second bearing 2119b rotatably coupled to the grinding rotary part, a guide 262 coupled to the burr coupler 2122, and a rotating ring 261 configured to move the guide in the axial direction of the first burr to adjust the grinding degree.
  • the grinding adjustment rotary part 260 may be located closer to the first burr outlet 2319 than the grinding rotary part 250.
  • the first grinder 211 may include a first housing 241 configured to accommodate the first burr 231, the grinding rotary part 250 including a bearing part, and the grinding adjustment rotary part 260, and a second housing 242 coupled to the first housing 241.
  • the second grinder 212 may be inserted through the first opening 2411a and the second through-hole 2602, and thus the second burr 232 may be inserted into the first burr through-hole 2313.
  • An example of the inserted second burr is shown in FIG. 5(c).
  • FIG. 5(c) illustrates that the second burr 232 is inserted into the first burr through-hole 2313, and the fixing shaft 2128 is inserted into and supported by the fixing shaft coupling groove 2421a.
  • the distal groove end of the fixing shaft coupling groove 2421a may be spaced apart from the inserted end of the fixing shaft 2128 by a distance of h. This is because the groove does not completely fix the fixing shaft 2128, but supports the circumferential surface of the fixing shaft 2128.
  • the gap space may be changed as the guide 262 moves in the axial direction (indicated by an arrow) of the first burr when the grinding adjustment rotary part 260 rotates.
  • the depth by which the fixing shaft 2128 is inserted may be adjusted.
  • the size of the grinding space 238 may be adjusted. That is, the gap distance between the first burr 231 and the second burr 232 may be adjusted. Specifically, the gap between the first burr blade 2316 (see FIG. 3) and the second burr blade 2326 (see FIG. 3) may be adjusted.
  • the guide 262 may move along the rotating ring thread 2612a in the axial direction of the first burr instead of rotating.
  • the movement of the guide 262 may mean moving the burr coupler 2122 coupled through the accommodation space thread 2622a, and the movement of the burr coupler 2122 may mean moving the second burr 232 and the fixing shaft 2128.
  • the size of the ground coffee powder may be adjusted by adjusting the size of the grinding space, i.e., the depth of insertion between the first burr 231 and the second burr 232 or the depth of insertion of the fixing shaft 2128 into the fixing shaft coupling groove 2421a.
  • Adjusting the insertion depth between the first burr 231 and the second burr 232 means that the distance between the first burr blade 2316 and the second burr blade 2326 may be adjusted.
  • FIG. 6(a) shows an example of a whole bean supplier 100 that opens a capsule containing whole beans by the capsule opener 110.
  • FIG. 6(a) shows a protective body part 190 and a capsule protection cover 199 that form an outer shell to protect the capsule opener 110.
  • the coffee extraction apparatus 1000 may include a capsule mount 191 allowing a capsule 700 (see FIG. 7) having whole beans stored to be mounted thereon, and a capsule opener 110 configured to open the capsule 700 and discharge the whole beans stored in the capsule 700, an opening gear part 170 including a first opening gear 171 configured to rotate the capsule opener 110, and a grinding gear part 2915 including a main grinding gear 2916 coupled to the capsule opener 110 in a direction in which the whole beans are discharged through the capsule opener 110 and connected to a main grinding gear shaft for rotation of the grinder 200 and the first opening gear 171 to grind the whole beans discharged through the capsule opener 110, the grinding gear part 2915 being disposed under the opening gear part 170 to rotate the grinder 200 by the main grinding gear 2916.
  • the capsule opener 110 for opening the capsule 700 and the grinder 200 may be provided.
  • the grinder 200 may be positioned between the capsule opener 110 and the extractor 600 to immediately grind the whole beans discharged through the capsule opener 110.
  • the grinder 200 may be coupled to a lower portion of the capsule opener 110. This is intended to immediately grind the whole beans discharged from the capsule opener 110 to block contact with external contaminants and maintain freshness.
  • the main grinding gear shaft 2916a which is connected to the main grinding gear 2916 to rotate the main grinding gear 2916, may be further extended in the axial direction of the main grinding gear shaft and thus be connected to the first opening gear 171. That is, both the main grinding gear 2916 and the first opening gear 171 may be connected to the main grinding gear shaft 2916a to rotate simultaneously.
  • the diameter of the main grinding gear 2916 may be larger than the diameter of the first opening gear 171.
  • the rotational speed of the grinder 200 may be higher than the rotational speed of the capsule opener 110. This is because grinding whole beans requires a lot of power and high speed.
  • the rotational speed of the capsule opener 110 may be 60 RPM.
  • the capsule mount 191, on which the capsule is mounted may include a circular mounting body 1911 defining an exterior shape thereof, a mounting recess formed by denting a portion of the mounting body 1911 in a shape corresponding to the exterior shape of a capsule opening 7135 (see FIG. 7), and a whole bean drop hole 1915 formed by penetrating a portion of the mounting recess 1913 in an axial direction of the capsule opener 110.
  • the mounting recess 1913 may have a recess diameter larger than the diameter of the whole bean drop hole 1915. That is, a portion of the mounting body 1911 may be bent by being recessed. Thereby, a recess side surface 1911a of the mounting recess 1913 may be formed.
  • a mounting support surface 1911b to support the capsule may be formed. That is, the recess side surface 1911a may define an inner circumferential surface of the mounting recess 1913, and the mounting support surface 1911b bent from the recess side surface 1911a and extending toward the whole bean drop hole 1915 may support the capsule 700 when the capsule is mounted on the mounting recess 1913.
  • the whole bean drop hole 1915 is smaller than the outer diameter of the capsule and is larger than the outer diameter of a first blade part 1111, which will be described later. Accordingly, the capsule is not allowed to move into the capsule opener 110 through the whole bean drop hole, while a plurality of first blades 1111a provided in the first blade part 1111 may rise through the whole bean drop hole 1915 to open the capsule.
  • the recess side surface 1911a may be formed to correspond to the shape of the capsule body 710 near the capsule opening, which will be described later.
  • the recess side surface will be formed in a corresponding circular shape.
  • the recess side surface may also be formed in an angled shape.
  • the capsule closing part may be uniformly torn apart in the radial direction. Accordingly, when an angled recess is formed in a regular polygonal shape, the diameter of the recess may be obtained using a circle circumscribed to the regular polygon.
  • the capsule mount 191 may further include a capsule protection cover 199 rotatably coupled to the mounting body 1911 to protect the capsule 700 or the mounting recess 1913.
  • the capsule protection cover 199 may be rotatably coupled to the mounting body 1911 through a protection cover coupler 195.
  • a protection cover hinge coupler 1951 to be rotatably coupled to the capsule protection cover 199 may be provided to a portion of the circumference of the mounting recess 1913.
  • the capsule protection cover 199 may be hingedly coupled to the mounting body 1911 through the protection cover hinge coupler 1951.
  • the mounting body 1911 which may be formed in various shapes, may have a circular shape.
  • the outer diameter of the mounting body 1911 may be larger than the outer diameter of a rotating body 1151 of the capsule opener 110, which will be described later. Accordingly, the outer circumferential surface of the mounting body 1911 may not contact the outer surface of the capsule opener.
  • This is intended to further include a protective body part 190 configured to prevent whole beans from being contaminated in opening the capsule and grinding the whole beans.
  • the capsule opener 110 may include a protective frame 193 to be coupled to the coffee extraction apparatus 1000.
  • the protective frame 193 may be coupled to an upper side of the grinder case 280. Specifically, when the capsule opener 110 is coupled to the support 910 and the top of the grinder fixing part 281 to open a capsule, it may be connected such that the whole beans discharged from the capsule are directly introduced into the grinder 200, strictly, through the first grinder inlet 2111.
  • the protective body part 190 may include a side protection body 192 connected between the protective frame 193 and the mounting body 1911 to protect the outer side surface of the capsule opener 110. Accordingly, the mounting body 1911, the protective frame 193, and the side protection body 192 may serve to protect the capsule opener 110.
  • the side protection body 192 may be formed of a light-transmitting material. This is because the light-transmitting material allows the user to directly check whether the coffee extraction apparatus is actual operating or whether scattered coffee powder is accumulated and needs to be removed, and is excellent in terms of design.
  • a gear protection cover 285 may be coupled to the protective frame 193 to protect the opening gear part 170.
  • FIG. 6(b) is a cross-sectional view of the coffee extraction apparatus, taken along the plane indicated by S in FIG. 6(a).
  • the figure shows a rotating ring gear 1152 formed in a gear tooth shape on an outer circumferential surface of a driver rotating part 115, which is included in the capsule opener 110 and will be described later. Since the driver rotating part 115 has a ring shape with both ends open, the second housing 242 of the grinder 200 and the first grinder inlet 2111 are arranged inside the rotating ring gear 1152.
  • the driver rotating part 115 may be rotated through rotation of the rotating ring gear 1152.
  • an opening gear part 170 to transmit rotational power to the rotating ring gear 1152 may be coupled to one side of the capsule opener 110.
  • the opening gear part 170 includes a first opening gear 171 connected to the main grinding gear shaft 2916a to rotate together with the main grinding gear 2916.
  • the opening gear part 170 may also include a second opening gear 172 rotatably engaged with the first opening gear 171 and the rotating ring gear 1152.
  • the second opening gear 172 may serve as an idler gear.
  • the main grinding gear 2916 which is connected to the main grinding gear shaft 2916a, and the first opening gear 171 will rotate at the same time. Accordingly, when the opening of the capsule closing unit 750 is opened, the whole beans discharged from the capsule may be immediately introduced into the grinder 200 and ground into coffee powder.
  • FIGS. 7(a) and 7(b) show a circular capsule mounted on the capsule mount 191 and a cross section thereof.
  • the capsule 700 containing a desired type of whole beans may be opened by the capsule opener 110 when the user turns on the power after placing the capsule on the mounting recess 1913.
  • the capsule 700 may include a capsule body 710 including a capsule opening 7135 opened on one side, and a capsule closing part 750 configured to close the capsule opening 7135 after whole beans are put in the capsule body 710 through the capsule opening 7135.
  • the capsule closing part 750 may be provided in the form of a thin film, or may be provided as a capsule lid through screw coupling. In the illustrated example, the capsule closing part is provided in the form of a thin film.
  • the whole beans are packaged using the capsule in order to maintain freshness and a certain flavor. Even if the ground beans or coffee powder are preserved in an optimal environment, the original flavor of coffee is lost in about a week because the ground beans or coffee powder rapidly develops rancidity.
  • whole beans to be roasted and ground may be provided in the form of a packaged capsule from which about one cup of coffee can be extracted.
  • the capsule corresponding to the one cup of coffee is available in various three-dimensional shapes.
  • the capsule should be kept sealed to maintain the freshness of the whole beans, and should maintain sufficient pressure resistance against the pressure caused by the gas released from the whole beans during the storage period.
  • the capsule may be formed of a hard material such as plastics or aluminum.
  • the capsule may have an easily openable structure and be separately packaged in a sealed vinyl container.
  • a barcode indicating the whole beans contained in the capsule may be printed on the outer surface of each capsule.
  • the barcode may be read, and dripping and extraction may be automatically performed according to recipe information such as a present amount of water and drip method optimized for the whole beans.
  • the capsule mount 191 may further include a scanner (not shown) configured to recognize the barcode printed on the outer surface of the capsule 700.
  • the controller (not shown) may rotate the grinding adjustment gear part 2925 to adjust the grinding degree according to the type of the whole beans. Then, the degree to which the second burr 232 is inserted into the first burr 231 may be adjusted, and the grinding gear part 2915 and the opening gear part 170 may be rotated to grind the whole beans discharged as the capsule is opened.
  • FIG. 7(a) shows a capsule having a circular capsule body including a capsule opening on one side.
  • a film-type capsule closing part 750 is coupled to the capsule opening.
  • the capsule closing part 750 and the capsule body will define a storage space in which whole beans are stored.
  • a driver part 111 of the capsule opener 110 may penetrate and tear the film-type capsule closing part 750 using a blade, and then open the film-type capsule closing part 750 through rotation to facilitate discharge of the whole beans.
  • FIG. 7(c) and FIG. 7(d) show an example of a capsule that has the same function, but includes a capsule body having an angled shape.
  • the angled shape is intended to prevent the capsule from rotating when the driver part 111 rotates.
  • the mounting recess may also be formed in an angled form. In this case, the capsule may be prevented from rotating and be fixed due to the angled shape.
  • Roasted beans may develop rancidity more slowly than ground coffee powder, but may still easily develop rancidity by contact with air. Accordingly, a sealed packaging is preferable for the roasted beans.
  • the capsule since carbon dioxide is continuously released from the whole beans stored in the capsule, the capsule should be configured to withstand the expansion pressure caused by the carbon dioxide. Further, after the capsule is opened, all the whole beans should be discharged to the grinder 200. In an embodiment of the present disclosure, the whole beans move from the opened capsule to the grinder 200 by free fall. The capsule from which whole beans are discharged in this way may be advantageous over a capsule in which coffee powder is stored, in terms of disposal and recycling.
  • both the capsule body 710 and the film-type capsule closing part 750 may be formed of aluminum.
  • the entire capsule may be made of aluminum. Accordingly, the entire capsule may be recyclable, and may sufficiently withstand the pressure of gas such as carbon dioxide and have low oxygen permeability. Also, the film type part may be easily opened.
  • FIG. 8(a) is an exploded view of an exemplary capsule opener.
  • FIG. 8(b) shows an exemplary driver part.
  • FIG. 8(c) shows a view of the driver seen from above.
  • the capsule opener 110 may include a driver part 111 configured to open the capsule closing part 750, and a driver rotating part 115 configured to move the driver part 111 toward the position of the capsule closing part and rotate the driver part 111 to open the capsule closing part 750 to allow whole beans to move to the grinder 200.
  • the driver rotating part 115 may move the driver part 111 from an initial position to a preset opening height through rotation, and then rotate the driver part 111.
  • the driver rotating part 115 may include a cylindrical rotating body 1151 opened at both ends and configured to rotate by rotational power transmitted from the opening gear part 170, the rotating body 1151 defining a driver installation space 915 therein to accommodate the driver part 111, a capsule mount coupling hole 1159 arranged at one of the both ends of the rotating body 1151 and coupled to the capsule mount 191, a whole bean outlet 1156 arranged at an opposite one of the both ends of the rotating body 1151 to allow the whole beans discharged from the mounted capsule 700 to be discharged toward the grinder 200 therethrough, and a driver movement guide 113 arranged between the driver part 111 and the rotating body 1151 in the driver installation space 915 and configured to rotate together with the rotating body 1151 to move and rotate the driver part 111.
  • the driver movement guide 113 may include a ring-shaped movement ring body 1131 defining an exterior shape of the driver movement guide, and a protruding movement thread 1133 arranged on an inner circumferential surface of the movement ring body 1131 and coupled to a plurality of body protrusions 1118a protruding from an outer circumferential surface of the driver body 1118.
  • a movement stopper 1133a may be formed at one end of the protruding movement thread 1133 positioned close to the capsule mount coupling hole 1159 between both ends of the protruding movement thread 1133 to prevent the driver part 111 from rising higher than the opening height.
  • FIG. 8(a) shows an example of the movement stopper 1133a provided in a protrusion shape.
  • a stopper having a shape similar to that of the movement stopper 1133a may be provided at the opposite end of the protruding movement thread 1133.
  • the driver movement guide 113 may further include a plurality of fixing protrusions 1132 provided on an outer circumferential surface of the movement ring body 1131, and the rotating body 1151 may further include a plurality of inner fixing guides 1153 provided on an inner circumferential surface of the rotating body 1151 and corresponding to the plurality of fixing protrusions 1132.
  • the plurality of fixing protrusions 1132 may be coupled to the plurality of inner fixing guides 1153 to rotate the rotating body 1151 and the driver movement guide 113 simultaneously upon receiving rotational power by the opening gear part 170,.
  • the driver rotating part 115 may include a gear toothed rotating ring gear 1152 formed on the outer circumferential surface of the rotating body 1151.
  • the rotating ring gear 1152 may be engaged with the opening gear part 170 to transmit the rotational power of the opening gear part 170 to the driver rotating part 115.
  • the driver movement guide 113 will be rotated by the plurality of fixing protrusions 1132 coupled to the plurality of inner fixing guides 1153.
  • the rotation of the driver movement guide 113 means rotation of the movement ring body 1131.
  • the protruding movement thread 1133 provided on the inner circumferential surface of the movement ring body 1131 may be screw-coupled to the body protrusion 1118a.
  • the rotating body 1151 and the movement ring body 1131 may rotate in the first rotation direction.
  • the driver part 111 may move toward the capsule mount coupling hole 1159 because the protruding movement thread 1133 is relatively rotated.
  • the movement of the driver part 111 may be performed to a predetermined opening height.
  • the opening height refers to the distance that the driver part 111 moves from the whole bean outlet 1156 to the capsule mount coupling hole 1159. Alternatively, it means the maximum distance that the driver part 111 may move from the initial position.
  • the opening height may be determined by the movement stopper 1133a. That is, when the driver part 111 moving along the inclined surface of the protruding movement thread 1133 meets the movement stopper 1133a of a protrusion shape provided at one end of the protruding movement thread 1133, the driver part 111 may no longer move. Instead, the driver part 111 will rotate together with the rotating body 1151 and the movement ring body 1131 at the same speed.
  • the driver part 111 will rotate after moving from the initial position to the opening height.
  • FIG. 8(a) shows an example without a stopper having a shape similar to that of the movement stopper 1133a at the opposite end of the protruding movement thread 1133.
  • An inner supporting step 1154 spaced apart from the protruding movement thread 1133 may be arranged on an inner circumferential surface of the rotating body 1151 under the protruding movement thread 1133. That is, the inner supporting step may be provided between the opposite end of the protruding movement thread 1133 and the whole bean outlet 1156, and thus the driver part 111 may only rotate without moving toward the bean outlet 1156 any longer.
  • the driver part 111 comes out from the opposite end of the protruding movement thread 1133, it will spin idle with the movement thereof restricted by the inner support step 1154.
  • the driver part 111 will enter the opposite end of the protruding movement thread 1133, and move toward the capsule mount coupling hole 1159 along the inclined surface of the protruding movement thread 1133.
  • the preset initial position refers to a position where the driver part 111 leaving the protruding movement thread 1133 is caught by the inner support step 1154. Even when the driver part 111 is at the initial position, the height of a portion of the upper ends of the plurality of first blades 1111a from the inner support step 1154 may be greater than the vertical height from the inner support step 1154 to the whole bean drop hole 1915. Accordingly, at the initial position, a portion of the upper ends of the plurality of first blades 1111a may be positioned above the whole bean drop hole 1915. Therefore, when the user mounts the capsule on the capsule mount 191, the film-type capsule closing part may be pierced by the plurality of first blades 1111a.
  • the vertical height of the plurality of first blades 1111a may gradually increase as the distance from a driver hub 1112 increases. This is intended to more efficiently open the film-type capsule closing part 750. Accordingly, a portion of the upper ends of the plurality of first blades 1111a may represent an edge portion away from the driver hub 1112.
  • FIG. 8(b) shows an example of the driver part 111.
  • the driver part 111 serves to open the capsule 700.
  • the driver part 111 may include a driver hub 1112 providing a center of rotation, a first blade part 1111 including a plurality of first blades 1111a configured to open the capsule 700, one end of each of the plurality of first blades 1111a being connected to the driver hub 1112, a ring-shaped driver body 1118 surrounding the driver hub 1112, and a second blade part 1119 arranged under the first blade part 1111 to open the capsule 700 together with the first blade part 1111 to guide the discharge of whole beans stored in the capsule 700 toward the grinder 200, the second blade part 1119 including a plurality of second blades 1119a connected between the driver hub 1112 and the driver body 1118.
  • the driver body 1118 may be formed in a ring shape and be connected to the driver hub 1112 by the plurality of second blades 1119a.
  • the plurality of first blades 1111a which are arranged over the plurality of second blades 1119a, may be spaced apart from the second blade part 1119 by a predetermined distance and connected to the driver hub 1112.
  • a portion of the driver hub 1112 connected to the first blade part 1111 may have a conical shape, and a portion of the driver hub 1112 connected to the second blade part 1119 may have a cylindrical shape.
  • the conical shape of the driver hub 1112 may be intended to prevent whole beans falling from the capsule 700 from being accumulated on the driver hub 1112.
  • the vertical height of the plurality of first blades 1111a may gradually increase as the distance from the driver hub 1112 increases. This is intended to more efficiently open the film-type capsule closing part 750. Such a change in height may cause the capsule closing part 750 to begin to be torn from the outer side thereof toward the center when the plurality of first blades 1111a passes through the capsule closing part 750.
  • the film constituting the capsule closing part 750 may maintain tension, and the capsule closing part 750 may be easily torn when the plurality of first blades 1111a touches the center of the capsule closing part 750. If the tension is not maintained, the partially torn film may be merely deformed by the first blade part 1111, rather than being further torn open by the first blade part 1111 and the second blade part 1119 as to allow the whole beans to be discharged.
  • each of the plurality of first blades 1111a may be formed in a curved shape having a slope increasing in the first direction as the distance from the driver hub 1112 increases.
  • the area of the torn capsule closing part decreases as the distance to the center of the capsule closing part 750 decreases. This is because a larger radius forms a longer arc at the same angle, the area of a sector is proportional to by the square of the radius. Therefore, as the distance from the center in the radial direction increases, the size or length of the torn film may increase, requiring a larger portion of the film to be deformed to widen the gap in the torn film and allow the whole beans to be discharged better.
  • the ring-shaped driver body 1118 may include a whole bean communication hole 1115 therein.
  • the whole beans discharged from the capsule 700 will move into the rotating body 1151 through the whole bean communication hole 1115, and move to the grinder 200 through the whole bean outlet 1156.
  • the whole bean communication hole 1115 may be divided into a plurality of sections by the plurality of second blades 1119a.
  • the section of the whole bean communication hole 1115 may be larger than one whole bean, and accordingly the whole beans may pass therethrough.
  • the whole beans passing through the whole bean communication hole 1115 will move to the grinder 200 through the whole bean outlet 1156. Specifically, the whole beans may move into the grinder 200 through the first grinder inlet 2111 (see FIG. 6(b)) provided in the second housing 242 of the grinder (see FIG. 6(b)).
  • first wing surface 1111b of each of the plurality of first blades may be opposite to the inclination direction of a second wing surface 1119b of each of the plurality of second blades. This is because when the film-type capsule closing part 750 torn and opened by the first blade part 1111 meets the second blade part 1119 which rotates while being inclined in the opposite direction, the film may further flap, thereby facilitating the discharge of whole beans.
  • FIG. 9(a) shows that after a user mounts a capsule on the capsule mount 191, the plurality of first blades 1111a is inserted into the capsule through the capsule closing part.
  • FIG. 9(b) shows that the plurality of first blades 1111a is vertically moved to a maximum degree corresponding to a preset opening height and inserted into the capsule.
  • the edge of the capsule closing part 750 will be torn by the plurality of first blades 1111a as described above. Accordingly, a portion of the upper ends of the plurality of first blades 1111a will pass through the capsule closing part 750 and be inserted into the capsule.
  • an upper portion of each of the plurality of first blades adjacent to the free end of each of the plurality of first blades may pass through a portion of the capsule closing part corresponding thereto, and may be inserted into the capsule body.
  • the driver rotating part 115 When the user turns on the power to rotate the opening gear part 170, the driver rotating part 115 will rotate together with the driver movement guide 113 fixed therein, and accordingly the driver part 111 will move to the opening height along the protruding movement thread 1133. Thereby, as shown in FIG. 9(b), the plurality of first blades 1111a will be inserted into the capsule having the capsule closing part 750 whose edge has been torn when mounted. Accordingly, the capsule closing part 750 will be torn according to the shape of the plurality of first blades, and the capsule closing part 750 and the capsule body will remain connected to each other at the edge of the capsule opening 7135.
  • the driver part 111 moved to the opening height meets the movement stopper 1133a provided at one end of the protruding movement thread 1133, the driver part 111 will be restricted not to move any longer but to only rotate. Accordingly, as a portion of the edge of the capsule closing part 750 is torn by the plurality of first blades 1111a, it will flutter according to the rotation of the driver portion 111.
  • the capsule closing part 750 torn in the shape of the plurality of first blades 1111a due to the movement of the driver part 111 is further torn by the plurality of first blades 1111a due to rotation of the driver part 111, the whole beans will begin to be discharged, and the plurality of first blades 1111a will cause the torn or open capsule closing part 750 to flutter. Since the plurality of first blades 1111a is inclined in the first direction, it may ensure smoother fluttering.
  • the opened area of the capsule will increase, and the stored whole beans will be smoothly discharged through the whole bean outlet 1156.
  • the film-type capsule closing part 750 will be torn to flutter appropriately by the rotation of the plurality of first blades 1111a only to an extent that allows the contained whole beans to be well discharged, rather than being completely torn apart and separated from the capsule body 710.
  • the plurality of first blades 1111a when the plurality of first blades 1111a is inclined in the first direction, the plurality of second blades 1119a may be inclined in the second direction opposite to the first direction. Thereby, the whole beans may be discharged more smoothly.
  • FIG. 9(c) is a cross-sectional view illustrating that a capsule is mounted and a portion of the edges of the plurality of first blades 1111a penetrate the capsule closing part 750 and are inserted thereinto when the driver part 111 is at the initial position.
  • FIG. 9(d) shows the driver part 111 moved from the initial position shown in FIG. 9(c) to the opening height in a direction indicated by an arrow. That is, the driver part 111 is designed to move a distance indicated by h from the initial position to the opening height.
  • the whole beans When the capsule is opened, the whole beans will pass through the whole bean communication hole 1115 of the driver part 111 and move to the grinder 200 through the whole bean outlet 1156 of the driver rotating part 115. Since the whole beans are discharged through the inside of the rotating body 1151, contamination thereof may be minimized.
  • the rotating ring gear 1152 is provided on the outer circumferential surface of the rotating body 1151 to eliminate the need for installation of a driving component for driving the rotating body 1151 inside the rotating body 1151, the rotating body 1151 may be rotated through the outer circumferential surface even without a separate shaft.
  • FIG. 10 illustrates an example of a control method of the capsule opener 110.
  • the control method of the present disclosure includes an input sensing operation S50 of sensing an input for initiation of the coffee extraction apparatus 1000 from a user after a capsule is mounted.
  • the initiation by the user may be input by touching a display (not shown), a method using a button or a switch, or a speech recognition method.
  • the control method of the present disclosure may include reading a barcode marked on an outer circumferential surface of the capsule using a scanner (not shown) disposed on the capsule mount 191 and determining whether the capsule is authentic (S100) when the initiation by the user is recognized, which is performed after the input sensing operation.
  • the method may proceed to an error indication operation S150 of indicating that the capsule is inauthentic through the display (not shown).
  • the control method of the present disclosure may include when it is determined that the capsule is authentic, recognizing a type of whole beans (S200) through a barcode. Alternatively, determining the authenticity of the capsule and recognizing the type of the whole beans may be performed at the same time.
  • the grinding degree setting may be changed through the rotation of the grinding adjustment gear, and a first rotation operation S300 of receiving rotational power through the grinding drive unit and rotating the main grinding gear 2916 and the first opening gear 171 simultaneously in a first rotation direction may be performed.
  • the driver part 111 will move from an initial position to an opening height and then rotate.
  • the first rotation operation S300 may be continued until a preset grinding time elapses (S400).
  • the grinding time may depend on the type of the whole beans.
  • the control method of the present disclosure may determine that all the whole beans stored in the capsule have been discharged and ground. Accordingly, the control method of the present disclosure will return the second burr 232 whose position has been adjusted to adjust the grinding degree to the position before the adjustment.
  • the control method of the present disclosure may proceed to a second rotation operation S500 of returning the driver part 111 to the initial position from the opening height through rotation in the second rotation direction.
  • the second rotation operation S500 will be continued until a preset return time elapses (S600). Thereafter, water supply through the water supplier 400 will be performed to extract coffee.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Apparatus For Making Beverages (AREA)

Abstract

L'invention concerne un appareil d'extraction de café comprenant un support de capsule permettant de monter une capsule contenant des grains entiers, un dispositif d'ouverture de capsule configuré pour ouvrir la capsule et libérer les grains entiers contenus dans la capsule, une partie d'engrenage d'ouverture comprenant un premier engrenage d'ouverture configuré pour faire tourner le dispositif d'ouverture de capsule, un broyeur accouplé au dispositif d'ouverture de capsule dans une direction de libération des grains entiers par le dispositif d'ouverture de capsule afin de broyer les grains entiers libérés par le dispositif d'ouverture de capsule, et une partie d'engrenage de broyage comprenant un engrenage de broyage principal relié à un arbre d'engrenage de broyage principal configuré pour faire tourner le premier engrenage d'ouverture, la partie d'engrenage de broyage étant disposée sous la partie d'engrenage d'ouverture pour faire tourner le broyeur par l'engrenage de broyage principal.
PCT/KR2021/002638 2020-07-28 2021-03-04 Appareil d'extraction de café et son procédé de commande Ceased WO2022025379A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2020-0093540 2020-07-28
KR1020200093540A KR20220014008A (ko) 2020-07-28 2020-07-28 커피추출장치 및 그 제어방법

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WO2022025379A1 true WO2022025379A1 (fr) 2022-02-03

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PCT/KR2021/002638 Ceased WO2022025379A1 (fr) 2020-07-28 2021-03-04 Appareil d'extraction de café et son procédé de commande

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KR (1) KR20220014008A (fr)
WO (1) WO2022025379A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024127368A1 (fr) * 2022-12-16 2024-06-20 Jdp Ip Llc Appareil pour broyer des aliments
WO2025016222A1 (fr) * 2023-07-17 2025-01-23 玛西(北京)国际品牌管理有限公司 Nouveau système de réglage automatique de mouture de grains et son procédé de réglage
US12369744B1 (en) 2024-01-18 2025-07-29 Sharkninja Operating Llc Preparation of beverage machines for cold beverage brewing
US12369741B1 (en) 2024-01-18 2025-07-29 Sharkninja Operating Llc Preventing coffee bean grinder jamming

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013519488A (ja) * 2010-02-17 2013-05-30 コーニンクラケ ダウ エグバート ビー．ブイ． コーヒー飲料システム、コーヒー抽出装置、コーヒー豆包装カートリッジおよびコーヒー飲料を調製するための方法
US9546038B2 (en) * 2009-09-21 2017-01-17 Conair Corporation Disposable whole bean coffee filter
KR20170085527A (ko) * 2014-11-20 2017-07-24 스타벅스 코포레이션 음료 머신용 용기
KR20180032901A (ko) * 2016-09-23 2018-04-02 엘지전자 주식회사 커피 캡슐 장착 어셈블리
WO2018169126A1 (fr) * 2017-03-14 2018-09-20 주식회사 테쿰 Machine à café

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9546038B2 (en) * 2009-09-21 2017-01-17 Conair Corporation Disposable whole bean coffee filter
JP2013519488A (ja) * 2010-02-17 2013-05-30 コーニンクラケ ダウ エグバート ビー．ブイ． コーヒー飲料システム、コーヒー抽出装置、コーヒー豆包装カートリッジおよびコーヒー飲料を調製するための方法
KR20170085527A (ko) * 2014-11-20 2017-07-24 스타벅스 코포레이션 음료 머신용 용기
KR20180032901A (ko) * 2016-09-23 2018-04-02 엘지전자 주식회사 커피 캡슐 장착 어셈블리
WO2018169126A1 (fr) * 2017-03-14 2018-09-20 주식회사 테쿰 Machine à café

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024127368A1 (fr) * 2022-12-16 2024-06-20 Jdp Ip Llc Appareil pour broyer des aliments
WO2025016222A1 (fr) * 2023-07-17 2025-01-23 玛西(北京)国际品牌管理有限公司 Nouveau système de réglage automatique de mouture de grains et son procédé de réglage
US12369744B1 (en) 2024-01-18 2025-07-29 Sharkninja Operating Llc Preparation of beverage machines for cold beverage brewing
US12369741B1 (en) 2024-01-18 2025-07-29 Sharkninja Operating Llc Preventing coffee bean grinder jamming

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