JP2020031829A - Coffee dripper - Google Patents

Abstract

To provide a coffee dripper configured to provide constant- and good-taste coffee by reducing secondary extracts.SOLUTION: A dripper body 4 comprises a cylindrical part 6 having opened upper/lower ends, and the cylindrical part 6 includes a filter support face 10 having a conical shape narrowed toward the bottom. A paper filter 3 comes into contact with the filter support face 10 at an outer peripheral surface of one part thereof in the axial L direction, so as to be supported by the dripper body 4, with the upper portion 3a of the paper filter 3 projecting upward from the upper end of the cylindrical part 6. The length h1 in the axial L direction of the part of the paper filter 3 coming into contact with the filter support face 10 is shorter than the length h2 in the axial L direction of the portion of the paper filter 3 projecting upward from the cylindrical part 6, and the interior angle of the cone of the filter support face 10 is equal to the interior angle of the cone of the paper filter 3, where the internal angle is within 15-30 degrees.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a coffee dripper for extracting a coffee extract from coffee grounds.

As shown in Patent Document 1, a conventional coffee dripper has a dripper main body having upper and lower ends opened, and a filter paper having a constricted shape of a constriction for accommodating coffee powder. The filter paper is mounted on the inner peripheral surface of the conical shape of the constriction so that the entire filter paper fits inside the dripper body.
In the coffee dripper, after the filter paper is attached to the inside of the dripper main body, coffee powder is put into the filter paper, and hot water is poured into the coffee powder by pouring hot water from a pouring opening opened at an upper end of the filter paper. Then, a coffee extract (coffee) is extracted.

  In general, this type of coffee dripper is formed such that the inner angle of a cone formed by the inner peripheral surface of the dripper body (the angle between opposing oblique sides when the cone is sectioned along the central axis) is 60 to 70 degrees. In addition, since the entire filter paper is housed inside the coffee dripper, when coffee is brewed therefrom, there is a drawback that it is difficult for the coffee to have a certain taste, and the taste tends to vary.

  That is, the coffee extract extracted from the coffee grounds includes a main extract that flows directly below the inside of the filter paper and a sub-extract that flows down while leaching from the side surface of the filter paper. Of these, the main extract flows down while sequentially contacting the coffee powder, so that the flavor and taste are of good quality, whereas the sub-extract is downward along the inner peripheral surface of the dripper body. As it flows down, the flavor and taste are reduced compared to the main extract. The conventional coffee dripper is still improved in that, since most of the filter paper is in contact with the inner peripheral surface of the dripper body, a large amount of the sub-extract is extracted and it is difficult to obtain high-quality coffee. There was room for

JP 2014-104155 A

  An object of the present invention is to provide a coffee dripper capable of obtaining a coffee having a constant and good quality by reducing a sub-extract.

According to the present invention, there is provided a coffee dripper comprising a paper filter having a constricted conical shape into which coffee powder is put and a dripper body supporting the paper filter, wherein the dripper body is provided. Has a cylindrical portion whose upper and lower ends are open, and a filter support surface having a conical shape of a downward constriction is provided on an inner surface of the cylindrical portion. By contacting the filter support surface, the upper portion of the paper filter is supported by the dripper body in a state of protruding upward from the upper end of the cylindrical portion, and the paper filter contacts the filter support surface of the paper filter. The length of the portion in the axial direction of the paper filter is shorter than the length of the portion of the paper filter protruding upward from the cylindrical portion in the axial direction,
An interior angle of a cone of the filter support surface is equal to an interior angle of a cone of the paper filter, wherein the interior angle is in a range of 15-30 degrees.

  In the present invention, preferably, a plurality of vertical ribs are formed around the axis inside the cylindrical portion, and the inner surface of the vertical rib facing the axial direction has the axial line extending downward from the cylindrical portion. The inclined surface of the plurality of vertical ribs constitutes the filter support surface.

  The upper end of the vertical rib is lower than the upper end of the cylindrical portion, and the inner peripheral surface is separated from the outer peripheral surface of the paper filter at a portion above the upper end of the vertical rib on the inner peripheral surface of the cylindrical portion. It is preferable that a large-diameter portion is formed, and more preferably, the large-diameter portion gradually increases in diameter toward the upper end of the cylindrical portion.

  In the coffee dripper of the present invention, the inner angle of the cone of the filter support surface in the dripper body and the inner angle of the cone of the paper filter are formed at 15-30 degrees, and the upper part of the paper filter is projected upward from the dripper body. By supporting the paper filter on the dripper body, it is possible to reduce the amount of sub-extracted liquid that flows down the side of the paper filter and obtain high-quality coffee with good flavor and taste.

It is a front view showing the coffee dripper concerning the present invention. It is sectional drawing of FIG. It is a perspective view which shows a dripper main body. FIG. 4 is a plan view of FIG. 3. It is sectional drawing of a dripper main body.

The coffee dripper according to the present invention will be described with reference to FIGS.
The coffee dripper 1 has a paper filter 3 made of paper for holding the coffee powder 2 and a dripper main body 4 supporting the paper filter 3. The coffee powder 2 is obtained by crushing roasted coffee beans into powder. The coffee dripper 1 has a configuration particularly suitable for brewing coffee for one person.

  The dripper main body 4 has a cylindrical portion 6 whose upper and lower ends are open and extends in the direction of the axis L, a pedestal 7 connected to a lower portion of the cylindrical portion 6, and a handle 8 provided on a side surface of the dripper main body 4. ing. The dripper main body 4 is integrally formed of, for example, a synthetic resin having heat resistance, ceramic, metal, or the like.

The tubular portion 6 has a conical outer shape spreading downward. A plurality of vertical ribs 11 are provided on the inner periphery of the cylindrical portion 6 at equal intervals around the axis L, and the coffee extract permeated from the paper filter 3 flows down between the adjacent vertical ribs 11. Space is formed.
Also, the inner side surface of the vertical rib 11 forms an inclined surface 11a which is inclined in a direction approaching the axis L as it goes downward of the cylindrical portion 6, and the inclined surface 11a of the plurality of vertical ribs 11 causes a constriction. A filter support surface 10 having a conical shape is formed. It is preferable that the inner angle α of the cone of the filter supporting surface 10 (the angle between the oblique sides when the cone is sectioned along the axis) is in the range of 15 to 30 degrees.
As shown in FIG. 5, the lower end of the inner side surface of the vertical rib 11 forms a reverse inclined surface 11 b that is inclined in a direction away from the axis L as it goes downward of the cylindrical portion 6.

  Further, the upper end 11c of the vertical rib 11 is located below the upper end of the cylindrical portion 6, and thereby, the upper end of the cylindrical portion 6 is located above the filter supporting surface 10 so that the cylindrical portion 6 A large diameter portion 9 for separating the inner peripheral surface from the outer peripheral surface of the paper filter 3 is formed. The large diameter portion 9 is a tapered surface 9a whose diameter gradually increases toward the upper end of the cylindrical portion 6.

The pedestal 7 is for placing the coffee dripper 1 on a container 20 such as a coffee cup or the like, and has a ring shape surrounding a liquid drop opening 12 opened at the bottom of the dripper main body 4. The outer peripheral surface of the pedestal 7 is smoothly connected to the outer peripheral surface of the cylindrical portion 6 via a curved surface, and has a shape whose diameter gradually increases downward.
A part of the pedestal 7 is provided with two notches 13, 13 in which the outer periphery of the pedestal 7 is cut out in an arc shape, and these two notches 13, 13 are provided in the circumferential direction of the pedestal 7. ° They are located at different positions. As shown in FIG. 1, the notch 13 functions as a window for visually confirming the amount of coffee extract stored in the container 20 when the coffee dripper 1 is placed in the container 20.

  The droplet outlet 12 is disposed concentrically with the axis L and communicates with the filter support surface 10. The first portion 12 a has a larger diameter than the first portion 12 a, and the bottom portion of the dripper body 4 And a second portion 12b that communicates with the outside.

The paper filter 3 is previously formed into a conical shape, or is formed by rolling a flat sheet having a fan shape or a rectangular shape into a conical shape. The lower end is closed and the opening at the upper end is hot water. Is the spout 5. As shown in FIG. 2, the upper part 3 a of the paper filter 3 projects upward from the upper end of the tubular part 6 when a part of the outer peripheral surface in the direction of the axis L comes into contact with the filter support surface 10, as shown in FIG. At the same time, the lower portion 3b of the paper filter 3 is supported by the dripper main body 4 in a posture protruding from the lower end of the cylindrical portion 6 into the droplet lower port 12.
The interior angle θ of the cone of the paper filter 3 is equal to the interior angle α of the cone of the filter support surface 10, and its size is in the range of 15-30 degrees.
When the paper filter 3 is formed of a planar sheet, the paper filter 3 is not limited to the fan-shaped or rectangular shape as long as the paper filter 3 can be formed into a conical shape as described above, and may be formed of various flat surfaces such as a triangle, a trapezoid, and a circle. It can be formed using a sheet having a shape.

The length h2 of the upper part 3a of the paper filter 3 protruding upward from the upper end of the cylindrical part 6 in the direction of the axis L is longer than the length h1 of the filter support surface 10 in the direction of the axis L. The length h3 in the direction of the axis L where the lower part 3b projects downward from the filter support surface 10 is also longer than the length h1 of the filter support surface 10 in the direction of the axis L. Preferably, the length h2 is about 3-4 times the length h1 of the filter support surface 10.
In the present embodiment, the paper filter 3 has a total length of 155 mm, an inner angle θ of the cone of 20 °, and a diameter of the spout 5 of 55 mm.

  When brewing coffee using the coffee dripper 1, first, the pedestal 7 is placed on the opening edge of the container 20, and the coffee powder 2 is put into the paper filter 3. At this time, the paper filter 3 accommodates the coffee powder 2 (about 15 g) sufficient to obtain a serving of coffee. As shown in FIG. 2, when the ground coffee powder 2 is put into the paper filter 3, the layer of the coffee powder 2 reaches a position above the center position of the upper part 3 a of the paper filter 3 in the axis L direction. .

  In this state, when hot water is poured into the paper filter 3, a coffee extract is extracted from the coffee powder 2, and the coffee extract is dropped into the container 20 through the droplet outlet 12.

  At this time, the internal angle θ of the cone of the paper filter 3 is 15-30 degrees, which is smaller than the general internal angle (60-70 degrees) of a known filter paper, and the upper part 3a of the paper filter 3 is Since it projects from the dripper main body 4 and the atmospheric pressure acts on the outer peripheral surface, most of the coffee extract flows down while contacting the inside of the paper filter 3 with the coffee powder 2 sequentially, and Leaching from the side of the paper filter 3 is suppressed. That is, a small amount of the coffee extract flows down inside the paper filter 3 as the main extract and flows down the side surface of the paper filter 3 as the secondary extract. For this reason, a high-quality coffee with good flavor and taste can be obtained.

  Further, when a part of the coffee extract flows down along the side of the paper filter 3 as a sub-extract and reaches the upper end of the cylindrical portion 6, the sub-extract is removed between the vertical ribs 11 and 11. The liquid flows down from the droplet lower port 12 into the container 20 through the space. At this time, a large-diameter portion 9 is formed at the upper end of the cylindrical portion 6, and the inner peripheral surface of the cylindrical portion 6 is separated from the outer peripheral surface of the paper filter 3 at the large-diameter portion 9. The liquid is blocked by the upper end of the cylindrical portion 6 and overflows, and does not flow down along the outer peripheral surface of the cylindrical portion 6.

  In addition, as described above, the coffee dripper 1 is configured such that the inner angle θ of the cone of the paper filter 3 is smaller than the general inner angle of a known filter paper, so that the coffee extract is The extraction time of the coffee extract until it permeates the whole and drops from the lower end of the paper filter 3 can be equalized. Therefore, the coffee dripper 1 eliminates the variation in the extraction time, thereby eliminating the unevenness of the components of the coffee extract, and as the coffee extract flows down, the flavor and taste increase evenly, and the coffee powder 2 Since the unpleasant taste is evenly filtered by the filtering function, the flavor and taste of the obtained coffee can be stabilized.

  The pedestal 7 of the coffee dripper 1 is not limited to the shape shown in the illustrated embodiment, as long as the pedestal 7 is formed so that the coffee dripper 1 can be placed on a container 20 such as a coffee cup. For example, it may be formed in a tripod shape.

DESCRIPTION OF SYMBOLS 1 Coffee dripper 2 Coffee powder 3 Paper filter 4 Dripper main body 6 Tube part 9 Large diameter part 10 Filter support surface 11 Vertical rib 11a Inclined surface 11c Upper end

Claims (4)

A coffee dripper having a constricted conical paper filter for containing coffee powder and a dripper body supporting the paper filter,
The dripper body has a tubular portion whose upper and lower ends are opened, and an inner surface of the tubular portion is provided with a filter support surface having a conical shape of a downward constriction,
The paper filter is supported by the dripper body in a state in which an upper portion of the paper filter protrudes upward from an upper end of the cylindrical portion by contacting an outer peripheral surface of a part in an axial direction with the filter support surface,
An axial length of a portion of the paper filter that is in contact with the filter support surface is shorter than an axial length of a portion of the paper filter that protrudes upward from the cylindrical portion,
The interior angle of the cone of the filter support surface is equal to the interior angle of the cone of the paper filter, the interior angle being in the range of 15-30 degrees;
A coffee dripper characterized by the following:   Inside the cylindrical portion, a plurality of vertical ribs are formed around the axis, and an inner side surface of the vertical rib facing the axial direction is inclined in a direction approaching the axis as going downward of the cylindrical portion. 2. The coffee dripper according to claim 1, wherein the inclined surface of the plurality of vertical ribs constitutes the filter supporting surface. 3.   The upper end of the vertical rib is lower than the upper end of the cylindrical portion, and the inner peripheral surface is separated from the outer peripheral surface of the paper filter at a portion above the upper end of the vertical rib on the inner peripheral surface of the cylindrical portion. The coffee dripper according to claim 2, wherein a large diameter portion for causing the coffee dripper is formed.   The coffee dripper according to claim 3, wherein the large diameter portion gradually increases in diameter toward an upper end of the cylindrical portion.

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