JPH0678678A - Production of water-extracted coffee and device therefor - Google Patents

Abstract

PURPOSE:To provide a method for obtaining aroma-rich and, tasty water- extracted coffee in a simple and convenient way even in a common family, and to provide a device therefor. CONSTITUTION:Coffee powder is put into a vacuum vessel 3, which is then evacuated by a vacuum pump 1, followed by injecting the vessel 3 with a specified amount of water from a water container 6, and then returning the pressure in the vessel 3 to the atmospheric pressure. Then, the vessel 3 is evacuated again to a vacuum, and in this state, the coffee powder is extracted.

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 extract the coffee over a long period of time. Also, roasted and crushed coffee beans in a non-woven fabric pack are commercially available, which is also extracted by immersing the coffee bean pack in a predetermined amount of water and leaving it for 8 to 10 hours. Met.

[0003]

As described above, in the conventional method for producing brewed coffee, it takes a very long time to extract it, and it has not been possible to easily obtain it in a general household. 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 subtle aroma components may be volatilized.

[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 of the present invention comprises injecting water into a coffee powder held under reduced pressure while maintaining the reduced pressure, and then depressurizing. It is characterized in that the coffee is extracted under the atmospheric pressure or the atmospheric pressure.

Further, the apparatus for producing brewed coffee of the present invention is a vacuum pump for evacuating the inside of a vacuum container via a vacuum container, an airtight lid attached to the vacuum container, and a valve provided on the airtight lid. And a water container for injecting water into the vacuum container via a valve provided on the airtight lid.

[0007]

[Operation] The coffee powder after roasting and crushing contains a large amount of air, and simply injecting water into such coffee powder does not remove the air. The air entrained in the coffee powder can be removed by placing the coffee powder in a container and evacuating the container. By injecting water into the coffee powder maintained in the reduced pressure state, the coffee powder and the water can be sufficiently brought into contact with each other, the extraction efficiency is enhanced, and the water-dried coffee can be obtained in a short time.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below based on an embodiment shown in FIG. FIG. 1 is a front view, partially in section, showing an embodiment of the apparatus for producing brewed coffee of the present invention, which is a base 2 accommodating a vacuum pump 1.
A vacuum container 3 placed on the base 2, an airtight lid 4 attached to an upper opening of the vacuum container 3, and water connected to the airtight lid 4 via a three-way valve 5 on the upper side. It is composed of a container 6 and a pipe 7 connecting the three-way valve 5 and the vacuum pump 1.

The three-way valve 5 has a passage 5a which penetrates the airtight lid 4 and communicates with the vacuum container 3, a passage 5b which communicates with the water container 6, and a passage 5c which connects the pipe 7. By switching, the passage 5a and the passage 5b or the passage 5a and the passage 5c are operated to communicate with each other. In addition, a packing 4a for maintaining airtightness is provided on the inner circumference of the airtight lid 4.

Next, a procedure for producing brewed coffee using the above apparatus, that is, an embodiment of the method of the present invention will be described.
First, a predetermined amount of coffee powder C that has been roasted and crushed in advance in the vacuum container 3, for example, 2 cups of coffee powder 3
0 g is put, and 300 cc of water W in an amount corresponding to the coffee powder C is put in the water container 6. This vacuum container 3 is the base 2
After mounting it on the airtight lid 4 and sealing the vacuum container 3, the vacuum pump 1 is operated and the three-way valve 5 is switched to the passage 5c side to evacuate the vacuum container 3.

After evacuation for a predetermined evacuation time, for example, 1 minute, the three-way valve 5 is switched to the passage 5b side and the predetermined amount of water W is injected into the vacuum container 3 from the water container 6 mounted in the passage 5b. When the water W in the water container 6 is exhausted, air flows into the vacuum container 3 and the inside of the vacuum container 3 returns to the atmospheric pressure. However, the coffee is extracted by leaving it for a predetermined time, for example, 10 minutes.

[0012] When the water W is injected while air is entrained in the water, the air enters the coffee powder C in a depressurized state and deteriorates the contact state between the coffee powder and water. Therefore, the shape of the water container 6 should be taken into consideration, and the water should be injected little by little when the water is injected from the water container 6 so that air is not entrained in the water as much as possible. In addition, a predetermined amount of water or more is put in the water container 6 in advance so that the water remains in the water container 6 even after the predetermined amount of water W is injected into the vacuum container 3, so that air is supplied to the vacuum container 3 The coffee powder C and the water W are brought into contact with each other in a depressurized state by operating so that the coffee powder and the coffee extract are prevented from coming into contact with the atmosphere and being oxidized.

After the extraction of the coffee is completed, the airtight lid 4 is removed, and the coffee liquid in the vacuum container 3 is filtered by a separately prepared paper filter or the like to separate the coffee powder, whereby a deliciously brewed coffee can be obtained. .

In this way, by preparing a predetermined amount of coffee beans and water and operating the vacuum pump 1 and the three-way valve 5,
You can get cold coffee in a short time of ten minutes.
The coffee liquor obtained is not exposed to the atmosphere for a long time, so it is not oxidized and its taste is not deteriorated, and subtle aroma components are not volatilized, and a rich aroma and delicious taste can be obtained. .

The structure of the device can be designed arbitrarily according to the amount of coffee liquid produced. For example, three pumps for evacuation, water injection, and air introduction can be used without using a three-way valve. A valve may be provided. Further, the base may be omitted and a vacuum pump may be separately installed, or a water container may be separately installed and water may be injected into the vacuum container due to a pressure difference. Further, the valve may be an automatic valve such as an electromagnetic valve, the vacuum pump may be operated and the valve may be opened and closed automatically, and a stirring means for stirring the liquid during extraction may be provided.

[0016]

As described above, according to the present invention,
Since coffee is extracted by injecting water into the coffee powder under reduced pressure, it is possible to extract the coffee powder by bringing the coffee powder and water into sufficient contact with each other, and the extraction efficiency is improved to obtain the coffee brewed in a short time. You can In addition, since the obtained coffee liquid is not exposed to the air for a long time, it does not deteriorate in taste due to oxidation or volatilize a subtle scent component, and it has a rich aroma and is delicious. can get.

[Brief description of drawings]

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

[Explanation of symbols]

1 ... Vacuum pump 2 ... Base 3 ... Vacuum container 4 ...
Airtight lid 5 ... 3-way valve 6 ... Water container C ... Coffee powder W ... Water

Claims (2)

[Claims] 1. A method for producing brewed coffee, which comprises injecting water into a coffee powder held under reduced pressure while maintaining the reduced pressure, and then extracting the coffee under reduced pressure or under atmospheric pressure. 2. A vacuum container, an airtight lid attached to the vacuum container, a vacuum pump for evacuating the inside of the vacuum container via a valve provided on the airtight lid, and a valve provided on the airtight lid. An apparatus for producing brewed coffee, comprising a water container for injecting water into a vacuum container.