JPH0614698Y2 - Siphon coffee extractor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a storage container heated by a heat source, and the inside of the storage container, a water pipe, and a membrane filter. A siphon coffee extractor comprising a brewing container arranged in communication.

(Prior Art) In this type of siphon coffee extractor, a support plate having a plurality of through holes is generally arranged on the extraction container side, and a film filter such as a cloth filter is provided on the support plate. It is configured to be attached. When extracting the coffee liquid, the storage container is heated in a state where water is stored in the storage container and coffee powder is stored in the extraction container at a predetermined amount. Then, due to the pressure increase in the storage container corresponding to the boiling of water accompanying such heating, the hot water that has risen in the water pipe will flow into the extraction container through the through hole of the support plate and the filter. The coffee liquid is extracted. Then, when the heating of the storage container is stopped after this, the coffee liquid comes back into the storage container according to the pressure drop in the storage container.

(Problems to be solved by the invention) However, in the above-mentioned conventional configuration, when the hot water flows into the brewing container, the coffee powder in the brewing container is not uniformly wetted, so that the coffee liquid is satisfactorily extracted. There was a drawback that it couldn't. Therefore, in actuality, in order to sufficiently wet the coffee grounds, a manual operation of stirring the coffee powder with a spoon or a stirring rod while the hot water is being supplied is required, which is troublesome. It was

Therefore, an object of the present invention is to sufficiently wet coffee grounds without the need for manually stirring the inside of the extraction container,
At the same time, another object thereof is to provide a siphon-type coffee extractor capable of preventing coffee powder from flowing into the extraction container.

[Structure of the Invention] (Means for Solving the Problems) The present invention relates to a storage container heated by a heat source, and to communicate with the inside of the storage container via a water pipe and a membrane filter. In a siphon coffee extractor comprising an arranged extraction container, a hot water diffusion plate is arranged below the filter on the extraction container side, and
Packing is provided to seal between the hot water diffusion plate and the inner surface of the extraction container. Further, the hot water diffusion plate allows the flow of hot water from the storage container to the extraction container side to allow the hot water diffusion plate to move. It is characterized in that it has a check valve portion for blocking the flow of the coffee liquid from the storage container to the storage container side.

(Operation) When the hot water that rises due to the siphon action flows into the extraction container from the storage container through the water pipe, the hot water rises along the inner surface of the extraction container by passing through the check valve portion of the hot water diffusion plate. The hot water flows into the brewing container while uniformly and vigorously rising along the inner surface of the brewing container. For this reason, a large turbulent flow occurs in the hot water that has flowed into the brewing container, so that the hot water and the coffee powder in the brewing container are sufficiently mixed, and the coffee powder is uniformly distributed by the hot water that has flowed in as described above. To be wet. Therefore, the coffee liquid is satisfactorily extracted, and the manual operation of stirring the inside of the brewing container becomes unnecessary.
On the other hand, the packing seals the space between the hot water diffusion plate and the inner surface of the brewing container, and the check valve portion of the hot water diffusion plate blocks the flow of the coffee liquid from the brewing container to the storage container side. It does not flow into the storage container.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

First, in FIG. 2, reference numeral 1 denotes a base, and a heater 2 which is a heat source and which is wound in a spiral shape, for example, is arranged on the left side of the upper surface of the base. On the right side of the base 1, there is provided a motor case 5 in which a motor 3 and a fan device 4 are arranged above and below, respectively. Reference numeral 6 denotes a crushing case detachably mounted on the motor case 5, and a cutter 7 for crushing coffee beans is arranged at an inner bottom portion of the crushing case. When the crushing case 6 is mounted on the motor case 5, the cutter 7 and the rotary shaft of the motor 3 are connected via a coupling 8. 9
Is a crushing filter provided on a part of the peripheral wall surface of the crushing case 6, and 10 is a coffee powder guide communicating with the inside of the crushing case 6 via the crushing filter 9. Reference numeral 11 is an operating timer provided inside the motor case 5 and located between the motor 3 and the fan device 4.

On the other hand, 12 is a container support, which is a leg portion 13 that is provided on the left side of the base 1 so as to be able to be taken in and out, a column 14 that is erected on this, and a holder 15 that is attached to the tip of this column 14. It consists of 16 is a heater 2
Is a heat-resistant glass container in the shape of a round bottom flask, the mouth of the upper end of which is held by the holder 15. On the other hand, 17 is an extraction container also made of a heat-resistant glass container, which is the first
As shown in the figure, a filter portion 18 to be described later is provided on the bottom thereof, and the water pipe 1 is directed downward from there.
9 is extended. A packing 20 is provided at the connecting portion with the water passage pipe 19 which is the neck portion of the extraction container 17, and the puncturing 20 is provided at the mouth of the storage container 16 while inserting the water passage pipe 19 into the storage container 16. The extraction container 17 is provided on the storage container 16 by being press-fitted, and at the same time, the extraction container 17 is held through the storage container 16 by the holder 1.
It is held at 5. Incidentally, 21 is an upper lid provided so as to cover the extraction container 17 and the crushing case 6, and 22 is a lid switch. Further, reference numeral 23 is a temperature detecting portion provided so as to come into contact with the outer wall portion of the extraction container 17, which is the extraction container 1
The rise of the hot water into the inside of 7 is detected, and the detected output is given to the operating timer 11.

Now, the filter section 18 will be described in detail with reference to FIGS. First, in FIG. 1, reference numeral 24 is a filter mounting plate to which a filter 25 made of, for example, a cloth, such as a cloth, is attached. The filter mounting plate has a circular plate shape as a whole, and a ring extending downward at the circumferential end of the circular plate portion 24a. The portion 24b is integrally formed, and a large number of through holes 24c are formed in the circular plate portion 24a. Reference numeral 26 denotes a hot water diffusion plate disposed in the extraction container 17 below the filter 25. This hot water diffusion plate is open at the circular plate portion 26a and the central portion of the circular plate portion 26a as shown in FIG. The circular plate portion 26a is formed of a cylindrical portion 26b protruding downward, and a ring portion 26 extending upward is provided at the circumferential end portion of the circular plate portion 26a.
c is formed. Here, 27 is a check valve portion provided, for example, in four pieces on the circular plate portion 26a, which comprises a valve body 28 and a through hole 26d formed in the circular plate portion 26a as shown in FIG. . The valve body 28 includes a shaft portion 28a, flange portions 28b and 28c formed at both upper and lower ends thereof, and a hot water passage groove 28d formed at a lower portion of the flange portion 28b. As a result, the check valve portion 27 is provided with the storage container 16
To the extraction container 17 side from the extraction container 17 side (the direction indicated by the arrow A in FIG. 1) to allow it, and the coffee liquid flow from the extraction container 17 to the storage container 16 side Arrow A
With respect to the direction indicated by (1), the valve body 28 moves upward and the flange portion 28c closes the through hole 26d to block the flow. Further, when the filter mounting plate 24 is fitted on the hot water diffusion plate 26, the ring portion 24 b of the filter mounting plate 24 and the ring portion 26 of the hot water diffusion plate 26 are fitted.
The edge portion of the filter 25 is sandwiched between it and c. Reference numeral 29 is a coil spring attached to the central portion of the lower surface of the filter mounting plate 24. The locking member 30 attached to the lower end of the coil spring is locked to the lower end of the water pipe 19 to provide the filter mounting plate. 24 is fixed to the extraction container 17. In this case, a predetermined gap is formed between the inner surface of the extraction container 17 and the filter 25 so that hot water flows from the storage container 16 to the extraction container 17 side. 31 is a packing attached to the cylindrical portion 26b of the hot water diffusion plate 26, which seals between the hot water diffusion plate 26 and the inner surface of the extraction container 17.

Next, the operation of the above configuration will be described. First, a predetermined amount of coffee beans is stored in the crushing case 6 and a predetermined amount of water is stored in the storage container 16. In this state, by energizing the motor 3 for a predetermined time by the timer 11,
The cutter 7 is rotated to crush the coffee beans. The ground coffee powder passes through the ground filter 9 and is guided by the coffee powder guide 10 to be stored in the extraction container 17. Then, the heater 2 is energized to turn on the storage container 1.
Heat the water in 6. By such heating, the storage container 1
When the water in 6 boils, this hot water rises in pressure in the storage container 16 and the water pipe 19 and the cylindrical portion 26 of the hot water diffusion plate 26.
Ascend through b. At this time, a part of the hot water flows into the extraction container 17 through the through hole 24c of the filter mounting plate 24 and the filter 25. On the other hand, most of the hot water rising through the water pipe 19 and the cylindrical portion 26b of the hot water diffusion plate 26 flows along the direction of arrow A in FIG.
Through the check valve portion 27 and uniformly rises along the inner surface of the extraction container 17 and flows into the extraction container 17. Moreover, in this case, the hot water that has passed through the check valve portion 27 passes through the gap between the inner surface portion of the extraction container 17 and the filter 25,
Since the hot water flows into the extraction container 17 vigorously, a large turbulent flow occurs in the hot water flowing into the extraction container 17.
As a result, since the hot water is sufficiently mixed with the coffee powder in the extraction container 17, the coffee powder is evenly moistened, so that the coffee liquid is satisfactorily extracted. Therefore, unlike the prior art, there is no need to manually agitate the inside of the extraction container 17. After that, when most of the hot water in the storage container 16 rises into the extraction container 17, the detection output that detects the rise of the hot water is given from the temperature detection unit 23 to the operation timer 11, and the heater 2 is turned off. And the fan device 4
Is energized. Thereby, the cooling air is blown to the storage container 16 through the air outlet 5a formed on the lower left side of the motor case 5 (see FIG. 2) to cool the storage container 16, so that the inside of the storage container 16 is cooled. The coffee extract liquid in the extraction container 17 has a negative pressure, and is sucked and stored in the storage container 16 through the filter portion 18 and the water pipe 19. In this case, the coffee extract passes through the filter 25, the through hole 24c of the filter mounting plate 24 and the cylindrical portion 26b of the hot water diffusion plate 26, and flows into the storage container 16 via the water passage pipe 19. The flow of the coffee liquid from the extraction container 17 that does not pass through to the storage container 16 side is blocked by the check valve 27 and the packing 31, so that the coffee powder is not captured by the filter 25 and flows into the storage container 16.

Further, since the check valve 27 is provided on the hot water diffusion plate 26, the flow of hot water from the storage container 16 to the extraction container 17 side is allowed and the flow of the coffee liquid from the extraction container 17 to the storage container 16 side is blocked. The operation performed reliably operates over a long period of time, further improving reliability. Further, since a plurality of check valves 27, for example, four, are provided on the hot water diffusion plate 26, the hot water flows into the brewing container 17 while rising more evenly along the inner surface of the brewing container 17. A large turbulence occurs in the hot water flowing into the container 17 and the extraction container 1
Within 7, the hot water mixes well with the coffee grounds.

Although the heater 2 is used as the heat source in the above embodiment, the present invention is not limited to this, and an alcohol lamp, for example, may be used as the heat source, which is widely applicable to general siphon coffee extractors.

Besides, the present invention is not limited to the embodiment described above and shown in the drawings, but the check valve portion 27 is composed of the through hole 26d of the hot water diffusion plate 26 and the valve body 28 which is separate from the through hole 26d.
Instead of this, the through hole of the hot water diffusion plate and a valve body integrated with the hot water diffusion plate and operable by a self-hinge or the like may be used, and the number of check valves 27 is limited to four. It goes without saying that various modifications can be made without departing from the spirit of the invention, such as one or more.

[Advantage of the Invention] As is apparent from the above description, the present invention has a hot water diffusion plate disposed below the filter on the extraction container side, and
A packing is provided to seal between the hot water diffusion plate and the inner surface of the extraction container, and further, the hot water diffusion plate allows the flow of hot water from the storage container to the extraction container side to allow it to flow from the extraction container. Since it has a check valve portion for blocking the flow of coffee liquid to the storage container side,
When the hot water in the storage container flows into the brewing container, the hot water vigorously flows through the check valve portion into the brewing container uniformly along the inner surface of the brewing container to form a turbulent flow and the hot water and the brewing container. The coffee powder in the inside becomes sufficiently mixed, so that the coffee powder can be sufficiently wetted without the need to manually agitate the inside of the extraction container, and at the same time, the coffee powder flows into the storage container itself. It also has an excellent effect that it can be prevented.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a vertical sectional view of an extraction container side, FIG. 2 is an overall vertical sectional view, and FIG. 3 is a perspective view of a hot water diffusion plate. In the drawing, 2 is a heater (heat source), 16 is a storage container, 1
7 is an extraction container, 19 is a water pipe, 25 is a filter, 26 is a hot water diffusion plate, 27 is a check valve part, and 31 is packing.

Claims (2)

[Scope of utility model registration request] 1. A siphon coffee extractor comprising: a storage container heated by a heat source; and an extraction container arranged on the storage container so as to communicate with the inside of the storage container via a water pipe and a membrane filter. In the vessel, a hot water diffusion plate disposed below the filter on the extraction container side, and a packing for sealing between the hot water diffusion plate and the inner surface of the extraction container are provided, and the hot water diffusion plate is It has a check valve part that allows the flow of hot water from the storage container to the extraction container side and blocks the flow of coffee liquid from the extraction container to the storage container side. Siphon coffee extractor. 2. The siphon coffee extractor according to claim 1, wherein a plurality of check valves are provided on the hot water diffusion plate.