JPH0251331B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an apparatus for extracting coffee, etc., which obtains an extract liquid by injecting hot water under pressure into a material to be extracted, such as coffee powder. This invention relates to an extraction device in which a substance to be extracted, such as a powder, is enclosed in a capsule.

BACKGROUND ART Conventional coffee extraction devices of this type are not easy to use and require a lot of effort to clean.

A conventional coffee extraction device will be explained based on FIG. In FIG. 3, 1 is a heater block, which is made of a good thermal conductor such as aluminum, and has a spiral water channel 2 and a spiral heating element 3 facing each other inside. A through hole 4 is provided in the center thereof so as to communicate with the water channel 2, and a recess 5 is provided below the through hole 4 so as to communicate with the through hole 4 through an opening 6 in a watertight manner by means of an O-ring 7. It is being A valve 8 that closes the opening 6 and a valve spring 9 that biases the valve 8 in a direction in which the opening 6 is always closed are provided in the recess 5 by screwing a valve seat 10 into the valve seat 10. Reference numeral 11 denotes a diffusion plate screwed onto the valve seat 10 with mounting screws 12.

13 is an electromagnetic pump, and this pump 13 has a suction pipe 15 extending from one side to the bottom of the water container 14.
and the other side is connected to the water channel 2 by a connecting pipe 16, thereby communicating the inside of the water container 14 and the water channel 2.

A hook plate 17 is provided at the lower part of the heater block 1 and has an opening at the center.A plurality of hook plates 17 are provided around the center opening of the hook plate 17 and are provided on the outer periphery of the upper end of the filter holder 19 having a handle 18. A plurality of notches 2 into which the claws 20 fit loosely
1, and a plurality of engaging pieces 22 that engage with the claws 20 by rotation of the filter holder 19 after the claws 20 pass through the notches 21.
23 is a filter housed in the filter holder 19, and 24 is a seal packing provided on the back surface of the heater block 1 and in airtight contact with the upper end of the filter 23. In the lower part of the filter holder 19, a discharge port 25 is provided at the central lower end of a tapered surface that descends toward the center. 26 is a receiving plate on which a demitasse cup 27 for storing this kind of coffee is placed; 28 is a saucer; 29
30 is an automatic temperature controller provided thermally in the heater block 1, and 30 is coffee powder delivered to the filter 22.

The operation of the extraction device configured as described above will be described below.

First, a required amount of water is poured into the water container 14, and then power to the heating element 3 is started. As a result, after a while the heater block 1 switches to the automatic temperature controller 2.
9, the temperature starts to be controlled to a predetermined temperature. During this time, a required amount of coffee powder 30 ground to a predetermined particle size is put into the filter 23, and placed in the filter holder 19, which is rotatably engaged with the hook plate 17. The preparation for coffee extraction is now complete.

Next, the demitasse cup 27 is placed on the receiving plate 26, which is located almost directly below the discharge port 25 of the filter holder 19, and the pump 13 is activated. At this time, the water in the water container 14 is pumped up by the pump 13 into the suction pipe 15,
It is fed under pressure to the water channel 2 in the heater block 1 via the connecting pipe 16. While this pressure-fed water passes through the spiral waterway 2, it is boiled by the heater block 1 which stores the heat of the heating element 3, and becomes hot water. It is pushed down against the force and reaches the coffee powder 30 through the diffusion plate 11. Then, the coffee liquid is extracted, flows out from the discharge port 25, and is poured into the demitasse cup 27. When the amount of coffee in the demitasse cup 27 reaches the required amount, the pump 13 is stopped and the coffee is ready.

Problems to be Solved by the Invention In such a conventional configuration, each time coffee powder is extracted, it is necessary to weigh it and put it into the filter 23, and the holes in the filter 23 through which the coffee liquid passes are not suitable for the coffee powder to pass through. Filter 23 is made as small as possible to eliminate as much as possible.
Care must be taken to avoid dirt and clogging, and as a result, it is necessary to keep the device clean by washing it after each use. Furthermore, the coffee powder used in this type of extraction device is extremely inconvenient to use, as the extraction pressure is determined by the particle size of the coffee powder, and therefore it is necessary to control the particle size of the coffee powder in order to obtain delicious coffee. It was hot.

The present invention solves these problems,
The purpose of this invention is to provide an easy-to-use extraction device for brewing coffee, etc.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention includes a capsule body having a substantially conical shape and formed of a thin film; A filter is provided with a small hole, and a convex part is located on the outside of the filter and is arranged so that it has a wider gap toward the center, is formed of a thin film, and has a weak line section approximately in the center. The capsule is composed of a spherical bottom plate and a rim extending outward from the lower end of the capsule body, and hot water is pumped under pressure by a pressure feeding device such as a pump into the capsule through a nozzle hole. The capsule is equipped with a nozzle that guides the capsule, and a guide ring that attaches the nozzle to the inner upper part and houses the capsule.

Function According to the above structure, when setting a capsule filled with coffee powder etc. in the extraction of coffee etc., it is only necessary to store the capsule in the guide ring, and the pressurized pressure feeding device is used to feed the capsule through the nozzle hole. When applying water pressure to the material to be extracted to obtain an extract, even if the filter bends downward due to the water pressure, there is still a gap between the convex spherical bottom plate and the filter, so the extract does not flow out of the filter. After flowing out, it gathers at the approximate center due to the convex spherical surface of the capsule bottom plate, and then flows out through the line of weakness broken by water pressure.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings. In FIGS. 1 and 2, 1 is a heater block, 2 is a water channel, 3 is a heating element, 4 is a through hole, 5 is a recess, 6 is an opening, 7 is an O-ring, and 8 is a through hole.
is a valve, 9 is a valve spring, 13 is a pump, 14 is a water container, 15 is a suction pipe, 16 is a connecting pipe, 17
is a hook plate, 21 is a notch, 22 is an engagement piece, 26
is a receiving plate, 27 is a demitasse cup, 28 is a saucer, 2
Reference numeral 9 denotes an automatic temperature controller, which has the same configuration as the conventional example.

31 is a capsule in which coffee powder 32 is sealed;
This capsule 31 has a substantially conical shape with an obtuse angle at the tip, and a capsule main body 33 made of a thin film such as aluminum, and a convex spherical shape that protrudes downward, with a weak line that opens under pressure and expands at the substantially center thereof. A bottom plate 3 having a portion 34a and formed of a thin film such as aluminum.
4, and coffee powder 3 disposed with a gap from the bottom plate 34 and enclosed in the capsule body 33.
The capsule main body 3 has a plurality of filters 35 having a plurality of filter ports 35a, which are small holes suitable for filtering the capsule body 3, arranged substantially uniformly over the entire surface.
The outer peripheral edge of the bottom plate 34 of the filter 35 is wrapped around the outer periphery of the bottom plate 34 of the filter 35 by a rim 36 extending outward from the lower end of the filter 35, and these are pressed and seamed.

37 is a guide ring, this guide ring 37
The conventional valve seat 10 shown in FIG. 3 is provided with a removable threaded part 37a on the internal threaded part 5a of the recessed part 5. Reference numeral 38 denotes a capsule storage section, and this capsule storage section 38 is located approximately in the center of the guide ring 37 and is formed in a concave shape with an opening 38a downwardly following the outer shape of the capsule 31, and is designed to accommodate the capsule 31. Sometimes the open end 37b abuts the rim 36 of the capsule 31. Reference numeral 39 denotes a nozzle provided at the upper part of the capsule storage portion 38, and this nozzle 39 is used to open the second O when the guide ring 37 is attached to the recess 5.
A conical surface with an acute tip is provided with a plurality of nozzle holes 39a communicating with the through hole 4 and the aperture 6 through the ring 40. The nozzle hole 39a opens at a position where the coffee powder 32 inside the capsule 31 can be extracted in a good manner when the capsule 31 is stored in the guide ring 37.

Reference numeral 41 denotes an exclusion ring provided on the outer circumferential step 37c of the guide ring 37 so as to be slidable up and down. When the opening end 37b is lowered, the opening end 37b is extended downward. In other words, guide ring 37
The capsule 31 stored in the capsule 31 is ejected from the capsule storage part 38 by bringing the lower end 41a of the exclusion ring 41 into contact with the rim 36 that protrudes outward from the opening end 37b, and by sliding the exclusion ring 41 downward. It's summery. A coil spring 42 is provided between the guide ring 37 and the exclusion ring 41, and this coil spring 42 biases the exclusion ring 41 in the direction of ejecting the capsule 31 as described above. In addition, 43 is a stopper of the coil spring 42,
This stopper 43 is integrally provided by mechanically deforming the caulked portion 37d of the guide ring 37.

A holder 44 is integrally provided with a handle 44a, and a plurality of claws 45 are provided on the outer periphery of the upper end of the holder 44 as in the conventional example, and a hook plate 17 is provided.
It passes through the notch 21 and is removably engaged with the engagement piece 22. The lower portions of the plurality of claws 45 are formed into a cylindrical shape by loosely fitting the guide ring 37 and the exclusion ring 41, and the bottom surface thereof is shaped like a cylinder.
1, and has a circumferential rib 46 on the bottom surface that abuts the rim 36 of the capsule 31, has a slightly smaller diameter than the opening 38a of the guide ring 37, and protrudes into a chevron-shaped cross section. It is equipped with This circumferential rib 46 is used for positioning the capsule 31 when it is stored in the holder 44, and for positioning the plurality of claws 45.
When the capsule 31 is set in the capsule accommodating portion 38 of the guide ring 37 by engaging the engaging piece 22, the rim 3 of the capsule 31 is inserted into the rim 3 of the capsule 31 together with the inner tapered surface 37e provided at the open end 37b of the guide ring 37.
6 is caulked and sealed to hold the capsule 31 airtight. In addition, 47 is a discharge port, and this discharge port 47
is provided at the center of the tapered surface that descends toward the center. Further, 41a is a plurality of recesses that prevent the capsule 31 from engaging with the exclusion ring 41.

Next, the operation of the extracting device configured as described above will be explained.

The water pressure route and water boiler are the same as in the conventional example, and will be explained starting with the preparation of coffee powder.

First, the capsule 31 is placed in the holder 44. At this time, since the capsule 31 is placed on the circumferential rib 46, the bottom plate 34 of the capsule 31 will not be deformed and the weak line portion 34a will not open.

Next, the holder 44 inserts the capsule 31 into the capsule storage portion 38 of the guide ring 37 while loosely fitting the exclusion ring. Then, the capsule 31 is further pushed in, and the exclusion ring 41, which is urged downward by the coil spring 42, is pressed against the spring force of the coil spring 42, passing through the cutout hole 21 of the hook plate 17, and the holder 44 is rotated. The attachment of the capsule 31 is completed by moving the capsule 31 to engage the engagement piece 22. Here, as in the conventional case, the upper surface of the engaging piece 22 and the lower surface of the claw 45 of the holder 44 are provided with inclined surfaces in the same direction. Tapered surface 37e and circumferential rib 46 of holder 44
The upper end of the capsule 31 is caulked and sealed near the rim 36 of the capsule 31 to hold it airtight.

Next, as in the conventional case, prepare the demitasse cup 27 and operate the pump 13.
The hot water fed under pressure is sent to the bottom plate 3 of the capsule 31.
The weak line portion 34a of No. 4 is expanded and opened, and coffee is injected under pressure through the nozzle hole 39a to extract coffee, and the coffee is produced in the demitasse cup 27.

When removing the capsule 31, use the holder 44.
When the guide ring 37 is separated from the engagement piece 22 of the hook plate 17 by rotating in the opposite direction to the engagement direction, the guide ring 37
The capsule 31, which has been press-fitted and held in the capsule storage portion 38 by the rotational engagement of the holder 44, is ejected by pressing the rim 36 of the expulsion ring 41 by the restoring force of the coil spring 42, and falls into the holder 44.

With this configuration, even if the filter 35 curves downward due to the pressure during extraction of coffee, etc., there is a gap between the bottom plate 34 and the filter 35, so the filtering action of the filter 35 can be performed smoothly. Further, the extraction liquid concentrates in the center along the convex spherical surface of the bottom plate 34, and the ruptured line of weakness 34
Since it flows out from the point a, it is easy to store it in a demitasse cup or the like. Furthermore, since the preparation steps and cleanup are simple, the usability is further improved, and delicious coffee etc. can always be obtained.

In addition, in one embodiment of the present invention, a single guide ring 37 that follows the outer shape of the capsule 31 is used, but this guide ring 37 may be composed of a plurality of divided parts. In short, any material may be used as long as it can prevent the capsule body 33 from deforming due to the pressure of the pump, which is a pressure feeding device.

Further, although the explanation has been given on the case where the weak line portion 34a is provided approximately at the center of the bottom plate 34, it is sufficient if a hole is made approximately at the center of the bottom plate 34 during a series of extraction operations.
The point is that the extract concentrates along the convex spherical bottom plate 34 and flows out of the capsule 31.

Effects of the Invention As described above, according to the present invention, there is provided a capsule body having a substantially conical shape and formed of a thin film, a filter which encapsulates an extract together with the capsule body and is provided with a plurality of small holes, and a filter having a plurality of small holes. Located on the outside of the filter, at least in the range where the plurality of small holes are provided, the filter is arranged so that the gap becomes wider toward the center, and is formed of a thin film, and has a weak line portion approximately in the center. a capsule comprising a convex spherical bottom plate and a rim extending outward from the lower end of the capsule body;
A nozzle having a nozzle hole that communicates with a pressure feeding device such as a pump, and this nozzle attached to the inner upper part,
In addition, since it is equipped with a guide ring that accommodates the capsule, even if the filter inside the capsule is deformed and curved due to the pressure of the pressurized pressure feeding device, the multiple small holes of the filter and the bottom plate for pouring out the extract will remain intact. There is enough space between them to prevent pouring.
As a result, it is possible to properly extract coffee, etc.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of a coffee extraction device showing an embodiment of the present invention, FIG. 2 is a sectional view of the same extraction device, and FIG. 3 is a sectional view of a conventional coffee extraction device. . 13...Pump, 31...Capsule, 32...
Coffee powder, 33...Capsule body, 34...Bottom plate, 34a...Weak line part, 35...Filter, 3
6... Rim, 37... Guide ring, 39... Nozzle, 39a... Nozzle hole.

Claims (1)

[Claims] 1. A capsule body having a substantially conical shape and formed of a thin film; a filter that encapsulates the substance to be extracted together with the capsule body and has a plurality of small holes;
The filter is located on the outside of the filter, and is arranged so that at least in the range where the plurality of small holes are provided, the gap becomes wider toward the center, and is formed of a thin film, and has a weak line portion approximately in the center. A capsule comprising a convex spherical bottom plate and a rim extending outward from the lower end of the capsule body, a nozzle having a nozzle hole that communicates with a pressure feeding device such as a pump, and a nozzle that is connected to the inside of the capsule body. A brewing device for brewing coffee, etc., comprising a guide ring attached to the upper part and housing the capsule.