Dual grinder for separating and removing the silverskin located in the center of coffee beans and grinding coffee beans.

Abstract

This invention relates to a grinder for separating and removing silverskin contained in coffee beans, thereby preserving the original flavor and maintaining freshness. Furthermore, by separating and removing the silverskin located at the center cut of the coffee bean, the original flavor and aroma of the coffee can be improved. Moreover, this invention can quickly and effectively separate and remove the silverskin contained in coffee beans without requiring large-scale equipment or complex processing. Furthermore, by separating and removing the silverskin located at the center cut of the coffee bean, this invention can maintain the freshness of the coffee beans and extend their shelf life. Furthermore, by removing factors that degrade the flavor of coffee caused by the mixing of coffee bean fibers and coffee oils, this invention can extract coffee with superior flavor. In addition, by separating and removing the silverskin located at the center cut of the coffee bean, this invention can increase the amount of coffee extracted and reduce the material cost of coffee beans.

Description

Technical Field

[0001] The present invention relates to a grinder for separating and removing silver skin contained in coffee beans in order to maintain the original flavor and freshness of coffee beans. More specifically, the present invention relates to the separation, removal of silver skin located in the center of coffee beans, and a dual grinder for grinding coffee beans.

Background Art

[0002] Generally, silver skin is a term referring to "coffee skin and coffee impurities".

[0003] Silver skin is a kind of by-product generated during the roasting process and is not harmful to the human body. However, the reason for removing silver skin is that although silver skin itself is harmless to the human body, it may have various effects on the flavor of coffee.

[0004] The silver skin on the surface of coffee beans can be separated and removed during the roasting process, but it is difficult to separate the silver skin in the wrinkles of the center cut of coffee beans.

[0005] Also, in a low-temperature roasting process, the amount of silver skin is large because the elongation of the wrinkles of coffee beans is insufficient, and in a high-temperature roasting process, the amount of silver skin is small due to the elongation of the wrinkles of coffee beans, and there is a characteristic of remaining.

[0006] In addition, silver skin weakens the components of pentanedione (butter), vinyl guaiacol (smoke), and furfural (caramel), and contains a lot of substances such as nonenal, hexanal, decadienal, and isovaleraldehyde, which may affect the flavor of coffee.

[0007] Whether this impact on coffee flavor is positive or negative is subjective and cannot be determined, as it depends on the consumer's personal preference. However, silverskin may not contain as many flavor compounds as the coffee bean itself, and excessive amounts of silverskin in coffee beans may negatively affect the coffee's flavor and aroma.

[0008] Furthermore, in light roasting processes (Nordic roast and light roast), the silverskin is not separated as much as in medium and dark roasts, which can negatively affect the flavor and aroma of the coffee.

[0009] As a technology to solve the aforementioned problems, the technology disclosed in Patent Document 1 was proposed.

[0010] Referring to Patent Document 1, it is disclosed that "a drum combustion gas discharge control device for a coffee roasting machine is provided, which has a structure that does not affect the discharge of combustion gases due to silver skin discharged from the drum along with the combustion gases, and which can optimally adjust the amount of airflow in the drum without being affected by changes in the length of the flue due to the installation environment of the coffee roasting machine."

[0011] However, the technology described in Patent Document 1, as disclosed above, suffers from a high degree of loss of the original aroma of coffee during the grinding process of coffee beans, and also results in a complicated operation.

[0012] Therefore, the present invention aims to provide a grinder that effectively separates and removes silverskin contained in coffee beans in a short time without requiring large-scale equipment or complex processing steps. [Prior art documents] [Patent Documents]

[0013] [Patent Document 1] South Korea, Patent Publication No. 10-2017-0110944 [Overview of the project] [Problems that the invention aims to solve]

[0014] The present invention aims to solve the aforementioned problems and to provide a grinder that maintains the original flavor and freshness of coffee and effectively separates and removes silverskin contained in coffee beans in a short time without requiring large-scale equipment or complex processing steps. [Means for solving the problem]

[0015] The present invention provides a grinder for separating and removing silverskin contained in coffee beans, characterized by comprising: an input port into which coffee beans are fed; first to fourth grinding rollers for grinding the coffee beans fed into the input port; an air nozzle for spraying air onto the coffee beans ground using the first and second grinding rollers to separate the silverskin from the coffee beans; an air supply pipe for supplying air to the air nozzle; an air valve for adjusting the amount of air sprayed from the air nozzle; a barrier plate for causing the coffee beans dispersed by the air nozzle to fall to the next grinding roller; a collection port for collecting the silverskin separated from the coffee beans; a dust collection pipe for collecting the silverskin separated from the coffee beans using a cyclone motor; a dust collection valve for adjusting the amount of air intake in the dust collection pipe; and a conveying motor for conveying the coffee beans ground by the fourth grinding roller.

[0016] Furthermore, the present invention provides a grinder for separating and removing silverskin contained in coffee beans, characterized in that the grinding roller includes a first grinding roller with grooves on vertical blades for impact grinding of coffee beans and second to fourth grinding rollers for adjusting the particle size of the ground coffee beans.

[0017] Furthermore, the present invention provides a grinder for separating and removing silverskin contained in coffee beans, characterized in that each of the two grinding rollers is rotatable in interlocking manner, and the distance between each of the two rollers can be adjusted.

[0018] Furthermore, the present invention provides a grinder for separating and removing silverskin contained in coffee beans, characterized in that the air nozzle is provided with a slit-type nozzle on the front and a mist nozzle on the top.

[0019] Furthermore, the present invention provides a grinder for separating and removing silverskin contained in coffee beans, characterized in that the slit-type nozzle has an air outlet designed in a curved shape to spray air over a wide area.

[0020] Furthermore, the present invention provides a grinder for separating and removing silverskin contained in coffee beans, characterized in that the mist nozzle sprays air at an angle of 15° to 16° in order to increase the time the coffee beans remain airborne.

[0021] Furthermore, the present invention provides a grinder for separating and removing silverskin contained in coffee beans, characterized in that a double sealed pipe is further provided, connected to the air supply pipe and the dust collection pipe, to supply air and collect the silverskin of the coffee beans.

[0022] Furthermore, the present invention provides a grinder for separating and removing silverskin contained in coffee beans, characterized in that the blocking plate is provided at an angle so that the coffee beans can move to the next grinding roller.

[0023] Furthermore, the present invention provides a grinder for separating and removing silverskin contained in coffee beans, characterized in that the conveying motor is further provided with a collection port that uses specific gravity to remove silverskin remaining on the coffee beans. [Effects of the Invention]

[0024] The present invention can provide a grinder that can effectively separate and remove the silver skin contained in coffee beans in a short time without requiring large-scale equipment and complex processing procedures.

[0025] By separating and removing the silver skin located at the center cut position of the coffee beans, the present invention can improve the original flavor and aroma of the coffee.

[0026] Moreover, the present invention can effectively separate and remove the silver skin contained in coffee beans in a short time without requiring large-scale equipment and complex processing procedures.

[0027] Furthermore, by separating and removing the silver skin located at the center cut of the coffee beans, the present invention can maintain the freshness of the coffee beans and extend the shelf life.

[0028] Also, the present invention can extract coffee with excellent flavor by removing the factors that cause flavor deterioration in the mixing such as the separation of the fiber quality and coffee oil of the coffee beans.

[0029] Furthermore, by separating and removing the silver skin located at the center cut of the coffee beans, the present invention can increase the extraction amount of coffee and reduce the material cost of the coffee beans.

Brief Description of the Drawings

[0030] The attached drawings are for explaining the content of the present invention in more detail to those of ordinary skill in the relevant technical field, but the technical idea of the present invention is not limited thereto. [Figure 1] It is a diagram showing an external view of a grinder for separating and removing the silver skin contained in coffee beans according to an embodiment of the present invention. [Figure 2] It is a diagram showing the internal structure of a grinder for separating and removing the silver skin contained in coffee beans according to an embodiment of the present invention. [Figure 3]This figure shows the structure of an air nozzle included in a grinder for separating and removing silverskin contained in coffee beans according to one embodiment of the present invention. [Figure 4] This figure shows the operating principle of an air nozzle contained in a grinder for separating and removing silverskin contained in coffee beans according to one embodiment of the present invention. [Figure 5] This figure shows the operating principle of a grinder for separating and removing silverskin contained in coffee beans according to one embodiment of the present invention. [Figure 6] This figure shows coffee beans ground using a grinder that separates and removes silverskin contained in coffee beans according to one embodiment of the present invention. [Figure 7] This figure shows the sensory evaluation of coffee extracted using a grinder that separates and removes silverskin contained in coffee beans according to one embodiment of the present invention. [Figure 8] This figure shows the consumer preference for coffee extracted using a grinder that separates and removes silverskin contained in coffee beans according to one embodiment of the present invention. [Modes for carrying out the invention]

[0031] The following describes in detail a grinder for separating and removing silverskin contained in coffee beans according to one embodiment of the present invention, but the scope of rights for the said grinder for separating and removing silverskin contained in coffee beans is not limited by the following description.

[0032] Where the specification as a whole states that a part "includes" a certain component, unless otherwise stated, it does not exclude other components, but rather means that it may further include other components.

[0033] Figure 1 shows an example of the appearance of a grinder used to separate and remove silverskin contained in coffee beans according to one embodiment of the present invention.

[0034] Figure 2 shows the internal structure of a grinder used to separate and remove silverskin contained in coffee beans according to one embodiment of the present invention.

[0035] Figure 3 shows the structure of an air nozzle included in a grinder used to separate and remove silverskin contained in coffee beans according to one embodiment of the present invention.

[0036] Figure 4 shows the operating principle of an air nozzle included in a grinder for separating and removing silverskin contained in coffee beans according to one embodiment of the present invention.

[0037] Referring to Figures 1-4, the grinder 10 for separating and removing silverskin contained in coffee beans according to one embodiment of the present invention includes an inlet 100, a first grinding roller 110, a second grinding roller 112, a third grinding roller 113, a fourth grinding roller 114, an air nozzle 120, an air supply pipe 121, an air valve 122, a shut-off plate 130, a collection port 140, a dust collection pipe 141, a dust collection valve 142, and a conveying motor 150.

[0038] The aforementioned input port 100 is into which coffee beans are introduced, and as shown in the attached Figure 2, it can be formed in the shape of a hopper, with a wider upper side and a narrower lower side.

[0039] Furthermore, the input port 100 may be made of a transparent material so that the coffee beans being inserted can be easily seen, allowing for hygienic replacement and management of the coffee beans.

[0040] Furthermore, the input port 100 can be further equipped with a temperature-maintaining member as needed to maintain the freshness of the coffee beans that have been introduced.

[0041] Furthermore, the input port 100 may be further provided with a lid, which is located above the coffee bean input port 100 and can prevent the input coffee beans from being contaminated by various external impurities and contaminants.

[0042] Furthermore, the lid may include a UV lamp in its interior ceiling to suppress bacteria that may grow on the coffee beans.

[0043] Here, a UV lamp is a lamp that emits ultraviolet light and is used for accelerating the "UV degradation" of materials or for sterilization. In addition, it has the characteristics of short wavelength, sterilization, and being completely absorbed by the ozone layer and atmosphere, and not only heating objects but also causing molecular interactions within the body.

[0044] The first grinding roller 110, the second grinding roller 112, the third grinding roller 113, and the fourth grinding roller 114 can grind the coffee beans that are fed into the input port 100.

[0045] Furthermore, the first crushing roller 110, the second crushing roller 112, the third crushing roller 113, and the fourth crushing roller 114 are each capable of rotating with two rollers meshing together, and the distance between each pair of rollers can be adjusted.

[0046] The first grinding roller 110 has grooves on its vertical blades, allowing it to grind coffee beans in an impact manner.

[0047] The second grinding roller 112, the third grinding roller 113, and the fourth grinding roller 114 can adjust the particle size of the coffee beans during grinding.

[0048] Furthermore, because the distribution of ground coffee beans ground using the second grinding roller 112, the third grinding roller 113, and the fourth grinding roller 114 is diverse, the high aroma of the extracted coffee can be emphasized.

[0049] The air nozzle 120 can spray air onto the coffee beans that have been ground using the first grinding roller 111 and the second grinding roller 112, thereby separating and removing the silverskin from the coffee beans.

[0050] Furthermore, the air nozzle 120 may be provided with a slit-type nozzle 123 on its front surface and a mist nozzle 124 on its top surface.

[0051] The aforementioned slit-type nozzle 123 has a bent air outlet, allowing air to be sprayed over a wide area.

[0052] The mist nozzle 124 can spray air at an angle of 15° to 16° in order to increase the time the coffee beans remain airborne.

[0053] The air supply pipe 121 can supply air to the air nozzle 120.

[0054] The air valve 122 can adjust the amount of air ejected from the air nozzle 120.

[0055] The blocking plate 130 may be provided at an angle so that the coffee beans diffused by the air nozzle 120 can fall onto the second grinding roller 112, the third grinding roller 113, and the fourth grinding roller 114.

[0056] The collection port 140 can collect the silverskin separated from the coffee beans.

[0057] The dust collection tube 141 can collect silverskin separated from the coffee beans using a cyclone motor.

[0058] The dust collection valve 142 can adjust the amount of air intake from the dust collection pipe 141.

[0059] The conveying motor 150 can convey the coffee beans that have been crushed by the fourth crushing roller 114.

[0060] Furthermore, the transport motor 150 may be further equipped with a collection port that uses specific gravity to remove silver skin remaining on the coffee beans.

[0061] The grinder 10 for separating and removing silverskin contained in coffee beans according to the present invention may be further provided with a double sealed pipe 160 connected to the air supply pipe 121 and the dust collection pipe 141, allowing for air supply and collection of the silverskin from the coffee beans.

[0062] Furthermore, the grinder 10 for separating and removing silverskin contained in coffee beans, according to the present invention, may also be provided with an outlet.

[0063] Furthermore, the discharge port can be adjusted according to the user's choice by adjusting the width of the discharge section, thereby adjusting the amount of coffee beans discharged. Since it is detachable, the grinder 10, which separates and removes silver skin contained in the coffee beans according to the present invention, can be hygienically managed and cleaned.

[0064] Figure 5 shows the operating principle of a grinder for separating and removing silverskin contained in coffee beans according to one embodiment of the present invention.

[0065] Referring to Figure 5, the operating principle of the grinder 10 for separating and removing silverskin contained in coffee beans according to one embodiment of the present invention is that the coffee beans stored in the input port 100 can be ground using the first grinding roller 110 and the second grinding roller 112 so that the silverskin can be separated and removed from the coffee beans.

[0066] The air supplied from the air supply pipe 121, from which moisture has been removed, is sprayed onto the crushed coffee beans through the air nozzle 120 to separate and remove the silverskin from the coffee beans. Since the coffee beans are relatively heavy, they fall to the bottom without being affected by the sprayed air, and the relatively lighter silverskin can be collected through the collection port 140.

[0067] Furthermore, the coffee beans from which the silverskin has been separated and removed can be re-ground using the third grinding roller 113 and the fourth grinding roller 114, the re-ground coffee beans can be conveyed via the conveying motor 150, and the last remaining silverskin of the coffee beans can be removed at the collection port using the specific gravity before being discharged from the discharge port.

[0068] Figure 6 shows coffee beans ground using a grinder that separates and removes silverskin contained in coffee beans according to one embodiment of the present invention.

[0069] Referring to Figure 6, the coffee beans ground using the grinder 10 for separating and removing silverskin contained in coffee beans according to one embodiment of the present invention can be obtained by first and second grinding the coffee beans containing silverskin using the first grinding roller 110 and the second grinding roller 112, separating and removing the silverskin contained in the coffee beans using the air nozzle 120 which sprays dehydrated air onto the first and second ground coffee beans, and then re-grinding the ground coffee beans with the third grinding roller 113 and the fourth grinding roller 114 to produce a uniform grind particle size.

[0070] Furthermore, the coffee beans ground using the grinder 10 of the present invention, which separates and removes the silverskin contained in the coffee beans, can provide consumers with the original flavor and freshness of coffee, and because the silverskin contained in the coffee beans is separated and removed, even the off-flavors of the coffee can be removed.

[0071] The present invention will be described in more detail below through specific experimental examples. However, these experimental examples are for illustrative purposes only, and the scope of the present invention is not limited to these examples.

[0072] Figure 7 shows a sensory evaluation of coffee extracted using a grinder that separates and removes silverskin contained in coffee beans according to one embodiment of the present invention.

[0073] Referring to Figure 7, evaluation tests were conducted according to the following examples to confirm the comparison and evaluation of aroma, flavor, aftertaste, body, clean cup, and sweetness of coffee extracted using a grinder 10 that separates and removes silverskin contained in coffee beans according to one embodiment of the present invention, and coffee extracted without separating and removing silverskin.

[0074] Example 1: Production of coffee (A) extracted by separating and removing silverskin contained in coffee beans. Coffee (A) was produced using a grinder 10 that separates and removes silverskin contained in coffee beans, according to the present invention.

[0075] Comparative Example 1: Production of coffee (B1) extracted from coffee beans without silverskin separation and removal. The procedure was carried out in the same manner as in Example 1, but the air nozzle 120 and collection port 140 included in the grinder 10 for separating and removing silverskin contained in coffee beans, which is the present invention, were not activated, and coffee (B1) was produced extracted from coffee beans without separating and removing silverskin.

[0076] Experiment Example 1: Sensory Evaluation of Coffee For the sensory evaluation, the subjects were 100 men and women (aged 20 to 50).

[0077] Since the sensory evaluation of coffee is conducted using human senses and subjective judgment, personal opinions were prohibited during the evaluation to avoid influencing others. Individuals undergoing dental treatment were excluded as they would be unable to properly perform the sensory evaluation. To ensure accurate evaluation, no information regarding the separation and removal of silver skin contained in the coffee beans was provided in advance. Participants were asked to taste the two types of coffee shown in Example 1 and Comparative Example 1. After tasting one coffee, they were required to rinse their mouths with water and wait at least three minutes before evaluating the next coffee.

[0078] The sensory evaluation method assessed items such as aroma, flavor, aftertaste, body, clean cup, and sweetness, assigning scores ranging from a minimum of 1 to a maximum of 10, with higher scores indicating a greater degree of preference.

[0079] The results for the 100 people evaluated were calculated as arithmetic evaluation values, and these calculated values ​​are shown in Table 1 below. [Table 1]

[0080] As can be seen from Table 1 above, the coffee extracted by separating and removing the silverskin contained in the coffee beans according to the present invention was found to have improved flavor and aroma by separating and removing the silverskin located at the center cut position of the coffee bean, thereby providing consumers with coffee that receives high sensory evaluations.

[0081] Figure 8 shows the consumer preference for coffee extracted using a grinder that separates and removes silverskin contained in coffee beans according to one embodiment of the present invention.

[0082] Referring to Figure 8, evaluation tests were conducted according to the following examples to confirm consumer preferences such as aroma, flavor, appearance, purchasing decision, and overall acceptability of coffee extracted using a grinder 10 for separating and removing silverskin contained in coffee beans according to one embodiment of the present invention.

[0083] Example 2: Production of coffee (C) extracted using a grinder that separates and removes silverskin contained in coffee beans. A total of five items were evaluated for coffee (C) extracted using the grinder 10, which separates and removes silverskin contained in coffee beans according to the present invention, including aroma, flavor, appearance, purchasing decision, and overall acceptability.

[0084] Comparative Example 2: Company A's coffee (D1) We evaluated five items for Company A's coffee (D1): aroma, flavor, appearance, purchasing decision, and overall acceptability.

[0085] Comparative Example 3: Company B's coffee (D2) We evaluated five items for Company B's coffee (D2): aroma, flavor, appearance, purchasing decision, and overall acceptability.

[0086] Comparative Example 4: Company C's coffee (D3) We evaluated Company C's coffee (D3) across five categories: aroma, flavor, appearance, purchasing decision, and overall acceptability.

[0087] Experiment Example 2: Evaluation of Consumer Preference for Coffee When evaluating consumer preferences, the evaluation was conducted on 100 men and women (aged 20 to 50).

[0088] Since consumer preference evaluation of coffee is based on human senses and subjective judgment, personal opinions were prohibited during the sensory evaluation to avoid influencing others. Individuals undergoing dental treatment were excluded as they would be unable to properly perform the sensory evaluation. To ensure accurate evaluation, no information regarding the separation and removal of silver skin contained in coffee beans was provided in advance. Participants were asked to taste each of the four types of coffee shown in Example 2 and Comparative Examples 2-4. After tasting one coffee, they were required to rinse their mouths with water and wait at least 3 minutes before evaluating the next coffee.

[0089] Consumer preference was assessed on a scale of 1 to 10, with a higher score indicating a greater degree of preference for each item, including coffee aroma, flavor, appearance, purchasing decision, and overall acceptability.

[0090] The results for the 100 people evaluated were calculated as arithmetic evaluation values, and these calculated values ​​are shown in Table 1 below. [Table 2]

[0091] As can be seen from Table 2 above, the coffee (C) extracted using the grinder 10 for separating and removing silverskin contained in coffee beans according to the present invention was found to be superior to commercially available coffees from companies A, B, and C in terms of aroma, flavor, appearance, and overall acceptability, and was found to have a high probability of future repurchase or purchasing decision.

[0092] Those skilled in the art in which the present invention pertains will understand that the present invention can be implemented in other specific forms without altering its technical concept or essential characteristics. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. The scope of the present invention is indicated by the claims that follow the detailed description above, and all variations or altered forms derived from the meaning and scope of the claims, as well as their equivalent concepts, should be interpreted as being included within the scope of the present invention. [Explanation of symbols]

[0093] 10. Grinder for separating and removing silverskin contained in coffee beans. 100 Inlet 110 First crushing roller 112 Second crushing roller 113 Third crushing roller 114. Fourth crushing roller 120 Air Nozzles 121 Air supply pipe 122 Air Valve 130 Barrier plate 140 Collection opening 141 Dust collection tube 142 Dust collection valve 150 Conveyor motor 160 Double sealed tube

Claims

1. The opening into which the coffee beans are inserted; First to fourth grinding rollers for grinding the coffee beans fed into the aforementioned input port; An air nozzle for spraying air onto the coffee beans ground using the first and second grinding rollers, thereby separating the silverskin from the coffee beans; An air supply pipe that supplies air to the aforementioned air nozzle; An air valve for adjusting the amount of air ejected from the aforementioned air nozzle; A barrier plate for dropping the coffee beans dispersed by the air nozzle onto the next grinding roller; A collection port for collecting the silverskin separated from the aforementioned coffee beans; A dust collection tube that uses a cyclone motor to collect the silverskin separated from the coffee beans; A dust collection valve for adjusting the intake volume of the dust collection tube; and A conveying motor for conveying the coffee beans that have been ground by the fourth grinding roller; A dual grinder for separating, removing, and grinding the silverskin located in the center of coffee beans, characterized by including [a specific feature].

2. The dual grinder for separating, removing, and grinding coffee beans, characterized in that the grinding rollers include a first grinding roller having grooves on vertical blades for impact grinding coffee beans, and second to fourth grinding rollers for adjusting the particle size of the ground coffee beans, as described in claim 1.

3. The dual grinder for separating, removing, and grinding coffee beans, as described in claim 1, is characterized in that each grinding roller has two rollers that interlock and can rotate, and the distance between each of the two rollers can be adjusted.

4. The dual grinder for separating, removing, and grinding the silver skin located in the center of coffee beans, as described in claim 1, is characterized in that the air nozzle has a slit-type nozzle on the front and a mist nozzle on the top.

5. The slit-type nozzle is characterized by having a bent air outlet that sprays air over a wide area, as described in claim 4, for separating, removing, and grinding the silver skin located in the center of the coffee beans.

6. The dual grinder for separating, removing, and grinding coffee beans, characterized in that the mist nozzle sprays air at an angle of 15° to 16° in order to increase the time the coffee beans remain airborne, as described in claim 4.

7. The dual grinder for separating, removing, and grinding coffee beans, as described in claim 1, further comprising a double sealed tube connected to the air supply tube and the dust collection tube, for supplying air and collecting the silverskin of the coffee beans.

8. The dual grinder for separating, removing, and grinding coffee beans, characterized in that the blocking plate is provided at an inclination so that the coffee beans can move to the next grinding roller, as described in claim 1.

9. The dual grinder for separating, removing, and grinding coffee beans, as described in claim 1, is further provided with a collection port using specific gravity to remove silver skin remaining on the coffee beans, in order to remove silver skin remaining on the coffee beans.

Images