COFFEE BEVERAGE BREWING EXTRACTION METHOD AND APPARATUS USING STIRRING FORCE

Abstract

The present disclosure relates to a coffee beverage extractor of a hand-drip type, and to a simple and convenient coffee beverage extraction method and apparatus, wherein, to reduce filter clogging and shorten the extraction time, by installing an improved dripper having a stirring function applied thereto, a coffee beverage can be quickly extracted at an espresso level from finely ground coffee beans, and a coffee beverage with deep flavor and increased extraction efficiency can be brewed from compressed coffee bean blocks and different types of ground coffee beans.

Claims

1. A coffee beverage brewing extraction method for extracting a coffee beverage using a hot water brewing method, the coffee beverage brewing extraction method comprising: maintaining a rate at which a coffee beverage is extracted from a mixed solution of coffee beans and hot water in a dripper or a filter through an extraction port of the dripper or filter holes for a certain period of time in order to expand an extraction area where the dripper or a filter surface of the filter and a mixed solution of coffee beans and hot water contact each other while coffee is being extracted to secure an extraction area where the mixed solution comes into contact with the dripper or the filter surface of the filter; and stirring the mixed solution in a state in which a level of the mixed solution is raised by a volume of a rotor disposed inside the dripper or the filter and submerged in the mixed solution to further expand the extraction area to extract the coffee beverage from the dripper or the filter.

2. The coffee beverage brewing extraction method of claim 1, wherein a standard extraction time for extraction from the extraction port of the dripper or the filter is set such that when only water is poured into the dripper or the filter having a capacity of 300 ml, a time taken when the water completely flows down through the extraction port of the dripper or the filter is typically 1 minute to 2 minutes and 30 seconds, and an extraction time is set by setting an area of the extraction port of the dripper or a size and arrangement of the filter holes of the filter to allow the standard extraction time to be shorter or longer depending on a change of the capacity of the dripper or the filter or a thickness of ground beans.

3. The coffee beverage brewing extraction method of claim 1, wherein the volume of the rotor is determined so that a volume of the rotor submerged in the mixed solution is 30% or more of a volume of the mixed solution.

4. The coffee beverage brewing extraction method of claim 1, wherein stirring force by the rotor is generated by a rotational force of a handwheel or a motor.

5. The coffee beverage brewing extraction method of claim 1, wherein stirring force by the rotor is generated by gravity or external force applied to a narrowed space between an outer surface of the rotor and a filter wall surface in a state where the rotor is not rotated but fixed in the mixed solution.

6. A coffee beverage brewing extraction apparatus for extracting a coffee beverage using a hot water brewing method, the apparatus comprising: a dripper or a filter having an extraction port or filter holes for maintaining a rate at which a coffee beverage is extracted from a mixed solution of coffee beans and hot water in the dripper or the filter through the extraction port or the filter holes for a certain period of time in order to expand an extraction area where the dripper or a filter surface of the filter and the mixed solution of coffee beans and hot water contact each other while coffee is being extracted to secure an area where the mixed solution comes into contact with the dripper or the filter surface of the filter; and a rotor that raises a level of the mixed solution by a volume of the rotor disposed inside the dripper or the filter and submerged in the mixed solution to further expand the extraction area and stirs the mixed solution.

7. The coffee beverage brewing extraction apparatus of claim 6, wherein a standard extraction time for extraction from the extraction port of the dripper or the filter is set such that when only water is poured into the dripper or the filter having a capacity of 300 ml, a time taken when the water completely flows down through the extraction port of the dripper or the filter is typically 1 minute to 2 minutes and 30 seconds, and an extraction time is set by setting an area of the extraction port of the dripper or a size and arrangement of the filter holes of the filter to allow the standard extraction time to be shorter or longer depending on a change of the capacity of the dripper or the filter or a thickness of ground beans.

8. The coffee beverage brewing extraction apparatus of claim 6, wherein the volume of the rotor is determined so that a volume of the rotor submerged in the mixed solution is 30% or more of a volume of the mixed solution.

9. The coffee beverage brewing extraction apparatus of claim 6, wherein stirring force by the rotor is generated by using at least one of a rotational force by a self-stirring rotation method through a handwheel or a motor, and a rotational force by a rotation transmission method through a rotation shaft.

10. The coffee beverage brewing extraction apparatus of claim 6, wherein the rotor is configured not to be rotated but to be fixed in the dripper or the filter.

11. The coffee beverage brewing extraction apparatus of claim 6, wherein the extraction port installed in the dripper is provided with an adjuster for adjusting an area of the extraction port.

12. The coffee beverage brewing extraction apparatus of claim 9, further comprising a rotation adjuster for adjusting a rotation speed of the rotor.

13. The coffee beverage brewing extraction apparatus of claim 6, wherein the dripper has a vacuum structure or a heating wire disposed between an inner wall and an outer wall thereof so that the dripper has a warming function.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0096] FIG. 1 is a cross-sectional view of an extractor according to the present disclosure.

[0097] FIG. 2 is a perspective view of an undiluted solution extraction unit container.

[0098] FIG. 3 is a perspective view of a dripper or a filter, a rotor, and a rotating part, which are main components of the extractor of the present disclosure.

[0099] FIG. 4 is a perspective view of the dripper, which is a main component of the extractor of the present disclosure.

[0100] FIG. 5 is a schematic diagram showing an example of using a mixer coupling of the extractor of the present disclosure.

[0101] FIG. 6 is a cross-sectional view of one embodiment of the rotating part and rotor of the extractor of the present disclosure.

[0102] FIG. 7 is a perspective view of one embodiment of the rotating part and rotor of the extractor of the present disclosure.

[0103] FIG. 8 is a perspective view of one embodiment of the rotor driven by a handle of the extractor of the present disclosure.

[0104] FIG. 9 is a perspective view of one embodiment the rotor fixing attachment of the extractor structure of the present disclosure.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

[0105] Hereinafter, a coffee beverage brewing extraction method and apparatus using stirring force according to a preferred embodiment of the present disclosure will be described in detail with reference to the accompanying drawings.

[0106] In the extraction method according to one embodiment of the present disclosure, after a dripper 11 is seated on a coffee beverage extraction unit 10, a filter paper is closely attached and seated to an inner wall of the dripper 11.

[0107] A capacity of the dripper is 400 ml, and an area of an extraction port was adjusted such that a complete extraction time is 1 minute and 15 seconds when only 300 ml of water is poured into the dripper.

[0108] After putting 10 g of finely ground medium-roasted beans with a grinding degree of espresso 0.2 mm into the filter paper of the dripper and pouring 260 ml of hot water at 95° C. without steaming, the beans was stirred using a cone-shaped rotor with a volume of 120 cc as shown in FIG. 8 while giving strength and weakness at 15 second intervals.

[0109] The fine coffee beans remained well mixed with water, and a 200 ml of coffee beverage was extracted within 1 minute without clogging of the filter.

[0110] This is the same level in total time as espresso extraction, considering 30 seconds required for the espresso extraction and a tamping process time.

[0111] There was no clogging of the filter by expanding the filter area using the method and principle presented in the present disclosure, and the extraction speed and extraction amount were accurately controlled by the area of the extraction port. The coffee flavor was deep and good, and the amount of extraction was 1.5 times more efficient than the existing hand drip.

[0112] In another example according to the present embodiment, after the dripper 11 is seated on the coffee beverage extraction unit 10 and the filter paper is closely attached and seated to an inner wall rib 113 of the dripper 11, 10 g of coffee bean compressed blocks are put inside the dripper 11 by appropriately crushing the blocks, and then 280 ml of hot water at 95° C. in total is poured into the dripper 11.

[0113] In this case, in order to steam the coffee beans, it may be possible to pour 25 cc of hot water, wait for 20 seconds, and then pour 255 ml of hot water, but this step may be omitted.

[0114] A dripper with a capacity of 300 ml was used as the extractor, and the area of the extraction port was adjusted to the extent that when 300 ml of water is poured into the dripper, it takes 1 minute and 30 seconds for all to flow down.

[0115] After steaming and pouring hot water, when the rotor 12 is rotated at 600 rpm for 1 minute and 30 seconds, coffee beans and hot water are well mixed and stirred by water waves, so the coffee beverage is extracted through the extraction port 110 of the dripper 11 by the centrifugal force due to the rotation and the gravitational action of the hot water.

[0116] At the time when the extraction is slowed down since the filter is clogged with powders such as coffee cell walls at the end time of coffee beverage extraction, when the centrifugal force is increased by increasing the speed of the rotor 12, the extraction may be completely achieved, or when the extraction is stopped at an appropriate time while the extraction is slowed down, the flavor is deepened.

[0117] The above method may adjust the amount of coffee beans, the speed of the rotor 12, and the amount of water, the number of times of pouring water, the extraction operation time through the adjustment of the extraction port, and the like. On average, when 200 ml to 250 ml of coffee beverage is extracted from compressed blocks of a 7 mm thick formed by compressing 10 g of medium-roasted coffee beans at a pressure of 600 kg/cm.sup.2, a sufficient amount of the coffee beverage having flavor was extracted.

[0118] Examining the coffee bean residue remaining in the dripper 11 after extraction, the epidermis of the coffee beans remained at an average size of 3 mm, and the cell walls of the bean honeycomb structure were broken to a size of around 0.1 mm. From this, it was found that the bad taste extracted from the smell of smoke, the smell of burnt, and the burnt resin of the fibrous portion contained in the epidermis of the beans during roasting was relatively small as the contact area of the bean epidermis with water was small. From the small structure of the honeycomb cell structure, since the total extraction time was about 2 minutes, the water-soluble coffee solids had a large area in contact with water and were sufficiently extracted, while extraction of the fibrous resin component of the cell walls was relatively less than the hand drip or leaching method due to the structure of the compressed blocks and the short extraction time.

[0119] As a result, a lot of acidity, sweetness, bitterness, and savory taste are extracted in a balanced way, so the flavor is deepened, and the impure taste such as burnt taste is greatly reduced due to little bad taste extraction. In addition, a large amount of coffee solids were extracted from the cracks of the compressed blocks and the honeycomb structure broken down by stirring, so that more than 1.5 times the average hand drip amount could be extracted.

[0120] In the present disclosure, in a structure where the bottom of an undiluted solution extraction unit is flat in the undiluted solution extraction unit 10, when the coffee beverage is extracted in the manner described in the above embodiment by hanging the dripper or filter on an upper edge of the undiluted solution extraction unit and disposing the rotor in an upper portion as shown in FIG. 7, the coffee beverage was smoothly extracted by centrifugal force and gravity until a time point at which the water level of the coffee beverage extracted from the dripper or filter 11 is lower than the water level in the dripper or filter 11.

[0121] In another embodiment of the present disclosure, 15 g of medium-roasted coffee beans was finely ground to a size suitable for an espresso or mocha pot, 280 ml of hot water at 92° C. was poured into the dripper, and then 200 ml of coffee beverage was extracted through the extraction port while stirring for 1 minute without steaming.

[0122] The extracted coffee beverage was quite thick and had a good flavor when 50 ml of water was added thereto.

[0123] The natural flavor of the coffee beans was good, there was no excessive extraction such as bad taste, bitter taste, and burnt taste due to the short extraction time, and there was no filter clogging even though the coffee beans were finely ground.

[0124] In the above, the speed of the rotor is 300 rpm, the rotor having a conical shape with a small volume was used, the area of the extraction port of the dripper was adjusted such that when only 300 ml of water is poured into the dripper, the total dripping time is 40 seconds, and it took about 1 minute for the mixed solution passed through the filter to be extracted from the extractor having the structure of FIG. 7 as the coffee beans and water are stirred, and 200 ml of coffee beverage was extracted.

[0125] In still another embodiment of the present disclosure, 15 g of medium-roasted coffee beans was ground to a size of about 1.2 mm for general hand drip, steamed for 20 seconds using hot water at 95° C., and then stirred. The stirring extraction time took a total of 1 minute and 40 seconds, and 220 ml of coffee beverage was extracted.

[0126] In the above, the speed of the rotor was 450 rpm and the area of the dripper extraction port was adjusted to the extent that when only 300 ml of water is poured, it takes a total of 1 minute and 30 seconds for water to flow down.

[0127] The extracted coffee beverage became a delicious coffee having the flavor with a well-balanced and appropriate concentration.

[0128] From the above examples, it can be confirmed that the method and apparatus of the present disclosure can efficiently extract flavored coffee beverages when applied to various ground and compressed blocks by adjusting the area of the extraction port and the volume and rotation speed of the rotor.

[0129] In the present disclosure, the stirring method of the present disclosure has been described as being made by the rotor disposed in the dripper or filter, but since the stirring method may be modified and applied in various forms, the stirring method of the present disclosure may be applied in various ways, such as vibrating or rotating the dripper from the outside and applying air bubbles into the dripper.

[0130] The embodiments described above are examples, and various changes and modifications may be made by those skilled in the art to which the present disclosure pertains within the scope not departing from the essential characteristics of the present disclosure.

[0131] Accordingly, the embodiments disclosed in the present disclosure are intended not to limit, but to explain, the technical idea of the present disclosure, and the scope of the technical idea of the present disclosure is not limited by these embodiments.

[0132] The protection scope of the present disclosure should be construed according to the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present disclosure.