JPH06165640A - Production of coffee extracted with and device therefor - Google Patents

Abstract

PURPOSE:To obtain a device for producing coffee extracted with water, capable of readily providing a common household with tasty coffee extracted with water, having good fragrance, in a short time. CONSTITUTION:A liquid receiving container 2, a filter holder 7, a filter 3 and a blender 4 are assembled, coffee powder A and water B are put in the blender 4 and a cover 9 is attached to the blender 4. The blender 4 is evacuated through a piping 5 by a vacuum pump 6. After a fixed time elapsed, the vacuum pump 6 is stopped, air is gradually introduced from the top of the blender 4 to extract coffee solution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing water-dried coffee, and more particularly to a method and apparatus for easily obtaining water-dried coffee in a general household in a short time.

[0002]

2. Description of the Related Art Conventionally, in order to obtain cold coffee,
It was common to set roasted and crushed coffee beans and water in an apparatus for producing wet coffee, and then drop the water little by little to extract the coffee liquid. Also, roasted and crushed coffee beans in a non-woven fabric pack are commercially available. This is also a product in which a coffee bean pack is immersed in a predetermined amount of water and left for 8 to 10 hours for extraction. Met.

[0003]

As described above, in the conventional method for producing brewed coffee, it takes an extremely long time to extract it. This is because the air entrained in the coffee grounds interferes with the contact with water, which is why
I couldn't easily get cold coffee at home. Further, since the extracted coffee liquid is exposed to the air for a long time, it may be oxidized and its taste may be deteriorated, or a subtle aroma may be emitted.

[0004] Therefore, an object of the present invention is to provide a method and an apparatus for producing brewed coffee, which can easily obtain brewed coffee with a rich fragrance even in a general home in a short time.

[0005]

In order to achieve the above-mentioned object, the method for producing brewed coffee according to the present invention is characterized in that a coffee powder and a coffee powder are placed in a mixing container in which a liquid receiver is airtightly connected to a lower portion through a filter. It is characterized in that water is put into the container, the chamber is evacuated from the upper part of the mixing container, and then air is introduced from the upper part of the mixing container.

Further, the apparatus for producing brewed coffee of the present invention comprises a liquid receiver, a mixing container airtightly mounted on the upper part of the liquid receiver via a filter, and a vacuum for evacuating the inside of the mixing container. It is characterized by having a pump.

[0007]

The coffee powder and water put in the mixing container are held in the mixing container by the filter. When the inside of the mixing container is evacuated by the vacuum pump connected to the mixing container, the air in the liquid receiver passes through the filter and passes through the coffee powder and water in the mixing container. This allows
The coffee powder and water are stirred under reduced pressure, the air entrained in the coffee powder is removed, the coffee powder and water are in sufficient contact, and extraction can be performed in a short time. The pressure in the liquid receiver is always higher than the pressure in the mixing container due to the resistance of the coffee powder and water, so the coffee in the mixing container does not fall into the liquid receiver. When air is introduced into the mixing container after a lapse of a predetermined time, the pressure inside the mixing container becomes higher than the pressure inside the liquid receiver, and the coffee liquid is dripped into the liquid receiver through the filter.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. FIG. 1 is a partial cross-sectional front view showing an embodiment of a brewed coffee producing apparatus of the present invention. The brewed coffee producing apparatus 1 includes a liquid receiver 2 and an upper portion of the liquid receiver 2. The mixing container 4 is detachably mounted on the mixing container 4 via a filter 3 and a vacuum pump 6 for evacuating the inside of the mixing container 4 via a pipe 5.

The liquid receiver 2 has a flange portion 2a for mounting the filter holder 7 and the filter 3 on the upper opening side.
Is a bottomed cylindrical vacuum container having a flange portion 2a
A male screw portion 2b is formed on the outer periphery of the.

The mixing container 4 is a cylindrical vacuum container in which a lid 9 is screwed onto an upper part through an O-ring 8 and a female screw part 4a screwed onto the male screw part 2b of the liquid receiver 2 is mounted on the lower part. The provided flange portion 4b is formed. A pipe 5 connected to the vacuum pump 6 is airtightly attached to a substantially central portion of the lid 9. The mixing container 4, the liquid receiver 2 and the lid 9 are such that after the filter holder 7 and the filter 3 are placed on the flange portion 2a of the liquid receiver 2, the mixing container 4 and the liquid receiver 2 are placed via the O-ring 10. By screwing and, and further by screwing the lid 9 to the mixing container 4 via the O-ring 8, an integrated airtight container is obtained.

When the coffee is extracted by the above-mentioned water-brewed coffee making apparatus 1, first, the liquid receiver 2, the filter holder 7, the filter 3 and the mixing container 4 are assembled as described above, and as shown in FIG. Then, coffee powder A and water B are put into the mixing container 4, and the lid 9 is screwed onto the mixing container 4.
At this time, the fineness of the filter 3 is appropriately set so that the coffee powder A and the water B can be held in the mixing container 4.

Next, as shown in FIG. 3, when the inside of the mixing container 4 is evacuated by the vacuum pump 6 through the pipe 5, the pressure inside the mixing container 4 is reduced and the air inside the liquid receiver 2 is also filtered. A vacuum is drawn through 3. This allows
The air in the liquid receiver 2 passes through the coffee powder A and the water B in the mixing container 4, and the coffee powder A and the water B are stirred and mixed. At this time, the pressure in the liquid receiver 2 becomes higher than the pressure in the mixing container 4 due to the resistance of the coffee powder A and the water B, so that the coffee powder A and the water B in the mixing container 4 become It does not fall into the container.

After a certain period of time, the vacuum pump 6 is stopped,
As shown in FIG. 4, air is gradually introduced from the upper part of the mixing container 4. At this time, the pressure in the mixing container 4 becomes higher than the pressure in the liquid receiver, a differential pressure is generated between the mixing container 4 and the liquid receiver 2 through the filter 3, and the coffee liquid C passes through the filter 3. Are slowly extracted into the liquid receiver 2. The introduction of air into the mixing container 4 can be easily performed by providing a three-way valve in the pipe 5 and switching the three-way valve.

An example of the actual production of the drainage coffee using the above-mentioned apparatus and method will be described below.

First, about 30 g of coffee powder for commercial ice coffee and about 500 cc of cooled water are put into a liquid receiver 2.
Put in the mixing container 4 attached to the upper part of the above, screw the lid 9 to the mixing container 4 and then operate the vacuum pump 6 for 10 minutes,
The air in the mixing container 4 and the liquid receiver 2 was discharged. At this time, the air in the liquid receiver 2 passed through the mixing container 4 through the filter 3, whereby the coffee powder and water were stirred and mixed. (The ultimate vacuum is about 100 Torr
Met. ) After 10 minutes, stop the vacuum pump 6
By gradually introducing air over a period of time, pressure was applied to the mixing container 4 and a differential pressure was generated between the mixing container 4 and the liquid receiver 2, and the coffee liquid was extracted into the liquid receiver 2. The obtained coffee liquid was not exposed to the air for a long time, so that it was not oxidatively deteriorated in taste, and subtle aroma components were not volatilized, and thus it was rich in aroma and delicious. .

[0016]

As described above, according to the present invention, in the production of brewed coffee, when the air in the liquid receiver passes through the filter and the coffee powder and water in the mixing container, By stirring the coffee powder and water, the coffee powder and water are brought into sufficient contact,
The extraction efficiency is improved, and the brewed coffee can be obtained in a short time. Furthermore, since the obtained coffee liquid is not exposed to the air for a long time, the taste that is oxidized is not deteriorated and subtle aroma components are not volatilized. can get. Moreover, since a stirring device for stirring the coffee powder and water is not required, the device can be downsized.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional front view of an apparatus for producing brewed coffee showing an embodiment of the present invention.

FIG. 2 is a sectional view of an apparatus for producing brewed coffee in a state where coffee powder and water are put in a mixing container.

FIG. 3 is a cross-sectional view of an apparatus for producing brewed coffee in a vacuumed state.

FIG. 4 is a cross-sectional view of the coffee manufacturing apparatus in a state where air is introduced into the mixing container.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Coffee making device, 2 ... Liquid receiver, 3 ... Filter, 4 ... Mixing container, 5 ... Piping, 6 ... Vacuum pump, 7 ... Filter holder, 8 ... O ring, 9 ... Lid, 10 ... O ring, A ... coffee powder, B ... water, C ... coffee liquid

Claims (2)

[Claims] 1. Coffee powder and water are placed in a mixing container in which a liquid receiver is airtightly connected to the lower part through a filter, vacuum exhaust is performed from the upper part of the mixing container, and then air is supplied from the upper part of the mixing container. And a method for producing brewed coffee. 2. Water comprising a liquid receiver, a mixing container airtightly mounted on the upper part of the liquid receiver via a filter, and a vacuum pump for evacuating the inside of the mixing container. Coffee brewing equipment.