WO2012081946A4

WO2012081946A4 - Foam generating member for espresso coffee machine

Info

Publication number: WO2012081946A4
Application number: PCT/KR2011/009758
Authority: WO
Inventors: 정우영
Original assignee: 컨벡스코리아 주식회사
Priority date: 2010-12-17
Filing date: 2011-12-18
Publication date: 2012-12-06
Also published as: CN103747714B; WO2012081946A2; WO2012081946A3; CN103747714A; KR200457227Y1

Abstract

The present invention relates to a foam generating member for creating crema, the foam generating member being inserted in a filter for extracting coffee and comprising: a plate-shaped body portion having a protrusion at the lower end thereof, the cross section of the protrusion being circular; and a nozzle portion including a nozzle having an inlet port and a outlet port which penetrate the center of the body portion, a membrane which is formed between the inlet port and the outlet port and has fine holes, which are formed to be smaller than the diameters of the inlet port and the outlet port, and vortex space portions having spaces formed between the inlet port and the membrane and between the membrane and the outlet port. The foam generating member, according to the present invention, is provided with the vortex space portions, which have spaces defined by a membrane provided inside the nozzle portion, and thus can effectively generate a large quantity of foam having fine particles when coffee is extracted by creating a vortex in the coffee solution which passes through the vortex space portions.

Description

The absence of foam in the espresso coffee machine

The present invention relates to a foam-generating member of an espresso coffee machine for producing bubbles of fine particles during coffee extraction. Especially, it is inserted into a filter of an espresso coffee machine and generates vortex before coffee is extracted, Thereby generating foam of the particles.

An espresso coffee machine, generally used in homes and offices, is a device for extracting coffee stock solution by spraying high pressure water into coffee powder.

There is no crema in the coffee concentrate extracted from the espresso coffee machine, and only the coffee concentrate may flow out. Krema refers to a layer of foam that floats on top of the coffee and serves to preserve the mysterious taste and aroma of coffee.

However, if the coffee extracted from the espresso coffee machine does not form keramas, the taste and flavor of the coffee can not be felt properly. There is still a lack of research on how to make the coffee beans in espresso coffee machine.

An object of the present invention is to provide a foam generating member for generating a large amount of foam of fine particles by generating a vortex in a coffee stock solution at an outlet when extracting espresso coffee.

The present invention relates to a foam generating member inserted into a filter for extracting espresso coffee to generate a screed, comprising: a dish-shaped body portion having a protrusion formed at a lower end thereof in a circular section; A through hole having an inlet port and a discharge port that penetrate the center of the body portion, a diaphragm having a fine hole formed to have a diameter smaller than the diameter of the inlet port and the outlet port and formed between the inlet port and the outlet port, and a space formed between the inlet port and the diaphragm, And a nozzle portion having a diaphragm formed at an intermediate portion formed between the inlet and outlet of the through hole so as to have a diameter larger than the diameter of the inlet and the outlet. At this time, it is preferable that the foam generating member according to the present invention is made of a synthetic resin material having an elastic force.

In the present invention, it is preferable that a plurality of diaphragms are formed in the intermediate portion, and that the inlet and the discharge port are formed such that the end portion is inclined inward or outward, and a thin film having a plurality of holes is formed in the discharge port. It is also preferable that a rib is formed on the upper surface of the body portion so as to be radially arranged with the nozzle portion as a center and protruding upward.

According to the foam generating member of the present invention, since the eddy space portion formed with the space is formed with the diaphragm inside the nozzle portion, a vortex is generated in the coffee ground liquid passing through the vortex space portion, so that when the espresso coffee is extracted, There is an effect that can be.

In addition, according to the foam generating member of the present invention, the upper and lower vortex space portions are formed on the basis of the diaphragm, and the pressure is dispersed in the nozzle portion, thereby preventing the foam generating member from sagging or bending due to high pressure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a foam generating member of the present invention. FIG.

2 is a plan view showing the foam generating member of the present invention.

3 is a bottom view showing the foam generating member of the present invention.

4 is a perspective view showing a state where the foam generating member of the present invention is combined with a filter;

5 is a cross-sectional view illustrating a foam generating member according to a first embodiment of the present invention;

6 is a sectional view showing a foam generating member according to a second embodiment of the present invention;

7 is a sectional view showing a foam generating member according to a third embodiment of the present invention;

8 is a sectional view showing a foam generating member according to a fourth embodiment of the present invention;

9 is a view showing a discharge port of a foam generating member according to a fourth embodiment of the present invention.

Hereinafter, a foam generating member of an espresso coffee machine according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing a foam generating member according to the present invention, FIG. 2 is a plan view showing a foam generating member according to the present invention, FIG. 3 is a bottom view showing a foam generating member according to the present invention, Fig. 3 is a perspective view showing a state in which the foam generating member of the invention is engaged with the filter.

1 to 4, the foam generating member 1 includes a body portion 10 and a nozzle portion 20, and is formed of a synthetic resin material having an elastic force.

The body 10 has a protruding portion 12 having a circular cross section at the lower end, and is formed in a dish shape with an open top. A rib 30 is formed on the upper surface of the body 10 to be radially arranged about the nozzle unit 20 so as to protrude upward. The rib 30 serves to prevent deformation of the body 10 due to high pressure. The protrusion 12 formed at the lower end of the body 10 is fitted to a hole (not shown) formed in the bottom surface of the filter 2.

The nozzle unit 20 is configured to generate vapors by generating a vortex in the coffee ground liquid and then discharge the coffee liquid. The nozzle unit 20 will be described later with reference to Fig.

FIG. 5 is a cross-sectional view showing a foam generating member according to the first embodiment of the present invention, and the nozzle unit 20 will be described in detail with reference to FIG.

The nozzle portion 20 has a through hole having an inlet 21 and a discharge port 22 penetrating the center of the body portion 10 and a fine hole 24a formed to be smaller than the diameter of the inlet 21 and the outlet 22, (24) formed between the inlet (21) and the discharge port (22), and an eddy-current space portion (24) formed between the inlet (21) and the diaphragm (24) 25, and 26, respectively.

An intermediate portion 23 having a diameter wider than the diameter of the inlet 21 and the outlet 22 is further formed between the inlet 21 and outlet 22 of the through hole and the diaphragm 24 is formed on the intermediate portion 23 . The diaphragm 24 may be disposed at the largest diameter in the intermediate portion 23, or may be disposed slightly above or slightly below.

When the coffee ground liquid flowing into the inlet 21 moves to the intermediate portion 23 as the middle portion 23 is formed in the through hole, a large amount of coffee stock solution is filled into the middle portion 23 .

The inner diameter gradually increases from the inlet 21 to the maximum diameter of the intermediate portion 23 and the inner diameter gradually decreases from the maximum diameter of the intermediate portion 23 to the outlet 22 and then expands again. The first vortex space portion 25 is formed on the upper side of the diaphragm 24 and the second vortex space portion 26 is formed on the lower side of the through hole.

The diameter of the orifice 27 is 0.4 to 0.5 mm. The diameter of the discharge port 22 is 0.7 to 0.5 mm. The diameter of the discharge hole 22 is 0.4 to 0.5 mm. It is preferable that the maximum diameter of the intermediate portion 23 is formed to be three times or more the diameter of the inlet 21.

On the other hand, a portion where the flow path narrows between the maximum diameter of the intermediate portion 23 and the discharge port 22 is referred to as an orifice 27. The orifice 27 is intended to change the pressure in the coffee ground liquid discharged from the second vortex space portion 26 to the discharge opening 22.

When the coffee stock solution flowing into the inlet 21 is discharged into the first vortex space part 25, the coffee stock solution is spread into the first vortex space part 25, And the diaphragm 24 to generate a primary vortex.

Next, when the coffee ground liquid is filled in the first vortex space part 25, the pressure in the first vortex space part 25 becomes high so that the coffee ground liquid passes through the fine holes 24a formed in the diaphragm 24, Is discharged to the second vortex space portion (26). The micropores 24a are expanded by the diaphragm 24 having the elastic force when the raw coffee liquor passes through the fine holes 24a formed in the diaphragm 24 and smooth discharge can be performed.

When the coffee stock solution is discharged into the second vortex space portion 26, the coffee stock solution is spread into the second vortex space portion 26 so that the coffee stock solution collides with the inner wall of the second vortex space portion 26 and the diaphragm 24 A secondary vortex is generated. Since the diameter of the fine holes 24a is smaller than the diameter of the inlet 21, the pressure variation of the coffee ground liquid discharged from the fine holes 24a to the second vortex space portion 26 is increased. As a result, the bubbles generated by the primary vortex can be fine-grained through the secondary vortex, resulting in bubbles of fine particles.

Then, when the coffee ground liquid is filled in the second vortex space portion 26, the pressure in the second vortex space portion 26 becomes high so that the coffee ground liquid is discharged to the orifice 27 and finally discharged to the discharge port 22 do.

In the narrow section, the flow velocity is increased. In the wide section, the flow velocity is rapidly reduced due to the pressure difference, so that a vortex is formed. Such a vortex causes a bubble of fine particles in the coffee stock solution. In addition, the viscosity of the coffee stock solution can increase the vortex generation due to the viscosity.

According to the Bernoulli principle, the cross-sectional area is small, the pressure decreases at a narrow point and contracts, and the pressure increases at a large cross-sectional area and expands. That is, a pressure difference is generated at two points having different cross-sectional areas, so that a vortex can be formed in the

vortex space parts

25 and 26 having a large cross-sectional area and a wide width.

The upper and lower

vortex space portions

25 and 26 are formed in the through hole on the basis of the diaphragm 24 so that the pressure is dispersed inside the through hole so that the bubble generating member 1 can be prevented from sagging or warping due to high pressure. There is also.

On the other hand, since the coffee particles passing through the fine holes 24a are in a constant and fine particle state, even if coffee particles are ejected into the ejection openings 22 having a large cross-sectional area, the particles are constant and small. Therefore, the coffee stock solution discharged to the discharge port 22 of the foam generating member 1 has bubbles of fine particles.

6 is a cross-sectional view showing a foam generating member according to a second embodiment of the present invention. In the second embodiment, the foam generating member is composed of a body portion 10 and a nozzle portion 40.

The body 10 is the same as the first embodiment, except that the shape of the aperture of the nozzle unit 40 is different from that of the first embodiment. In the second embodiment, the inner diameter of the through-hole is constantly increased from the inlet 41 to the maximum diameter of the intermediate portion 43 and gradually expanded. The inner diameter gradually decreases from the maximum diameter of the intermediate portion 43 to the discharge port 42, Structure. The first air flow space portion 45 is formed on the upper side of the diaphragm 44, and the second air flow space portion 46 is formed on the lower side of the through hole. In this case, it is preferable that the diameter of the inlet 41 is 0.4 to 0.5 mm, the diameter of the fine hole 44a is 0.2 to 0.3 mm, the diameter of the outlet 42 is 0.7 to 0.8 mm, It is preferable that the maximum diameter of the inlet 41 is three times or more the diameter of the inlet 41.

The first vortical space portion 45 is formed to have a wide cross section so that a pressure difference is generated in the coffee grounding liquid discharged from the inlet 41 to the first vortex space portion 45 And the flow velocity in the first vortex space portion 45 is slowed down. Due to such a change in the flow rate, a vortex is formed in the coffee stock solution discharged from the inlet 41 to the first vortex space part 45.

When the coffee ground liquid is filled in the first vortex space part 45, the pressure in the first vortex space part 45 becomes high and the coffee ground liquid passes through the fine holes 44a formed in the diaphragm 44. [ The flow rate of the coffee stock solution passing through the fine holes 44a is increased but the velocity of the flow is slowed in the second swirling flow space portion 46 so that the coffee grounding solution is discharged from the fine holes 44a to the second swirl space portion 46 Thereby forming a vortex. When the coffee ground liquid is filled in the second vortex space portion 46, the pressure in the second vortex space portion 46 becomes high, and the coffee ground liquid is discharged to the discharge port 42.

7 is a cross-sectional view illustrating a foam generating member according to a third embodiment of the present invention.

In the third embodiment, the foam generating member comprises the body portion 10 and the nozzle portion 50. The through hole of the nozzle unit 50 is the same as that of the first embodiment except that the end portion of the inlet port 51 is inclined outward and the intermediate portion 53 having a diameter wider than the diameter of the inlet port 51 and the discharge port 52, A plurality of diaphragms 54 having fine holes 54a are formed. The number of diaphragms 54 is preferably at least two. Any one of the plurality of diaphragms 54 is disposed at a position where the diameter is the largest in the intermediate portion 53, and the remaining portions are spaced apart from each other at regular intervals.

The end side of the inlet port 51 is formed to be inclined outward so that the flow of the fluid can be smoothly guided. In some cases, the flow direction of the fluid may be induced by inclining the end side of the inlet port 51 and the outlet port 52 inwardly. At this time, the inclination angle may be formed at various angles.

A plurality of

vortex space portions

55, 56, 57 and 58 are formed on the basis of the plurality of diaphragms 54, and as the primary foam formed by the vortex flows downward, particles of the foam are broken down by the vortex to become finer . That is, in the case where there are plural diaphragms, vortices are generated several times, so that the bubbles can be formed into fine particles.

8 and 9 are views showing a cross section of a foam generating member and a discharge port of a foam generating member according to a fourth embodiment of the present invention.

In the fourth embodiment, the foam generating member comprises a body portion 10 and a nozzle portion 60. The through hole of the nozzle unit 60 is the same as that of the second embodiment except that the end of the inlet 61 and the outlet 62 is inclined outward and the diameter of the outlet 61 is larger than the diameter of the inlet 61 and the outlet 62 A plurality of diaphragms 64 having fine holes 64a are formed in the middle portion 63 and a thin film 62a having a plurality of holes 62b is formed in the discharge port 62. [ A plurality of

vortex space portions

65, 66, 67, and 68 are formed on the basis of the plurality of diaphragms 64, and as the primary foam formed by the vortex flows downward, do.

The end of the inlet port 61 is sloped outward to smoothly guide the flow of the fluid. The discharge port 62 is also formed so that the end portion thereof is sloped outward, so that the slurry discharge is performed while spreading the discharged fluid in all directions . In some cases, the end of the inlet 61 and the outlet 62 may be inclined inward to induce a flow of fluid. At this time, the inclination angle may be formed at various angles.

The discharge port 62 is provided with a thin film 62a having a plurality of holes 62b. The fine bubbles formed by the vortex are discharged in the form of a thin stream by the plurality of holes 62b formed in the thin film 62a.

Claims

A foam generating member inserted into a filter for extracting espresso coffee to produce a scent,

A dish-shaped body portion having a protruding portion whose lower end is formed in a circular section;

A through hole having an inlet and a discharge port penetrating the center of the body portion; a diaphragm having a fine hole formed to be smaller than the diameter of the inlet and the outlet, the diaphragm being formed between the inlet and the outlet; A nozzle part having a diaphragm formed in an intermediate portion formed between the inlet and the outlet so as to have a diameter wider than the diameter of the inlet and the outlet;

The bubbling member of the espresso coffee machine.
The method according to claim 1,

Wherein the foam generating member is a synthetic resin material having an elastic force.
The method according to claim 1,

And a plurality of said diaphragms are formed in said intermediate portion.
The method of claim 3,

Wherein the inlet port and the outlet port are configured such that their end sides are inclined inward or outward.
The method according to claim 1 or 4,

Wherein the ejection port is provided with a thin film having a plurality of holes formed therein.
The method of claim 5,

Wherein a rib is formed on an upper surface of the body part so as to be radially arranged about the nozzle part and protruding upward.