JP2002159264A - Method for preserving coffee, and preservation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a preservation apparatus enabling extracted coffee to be preserved for a long time by inhibiting oxidization of the extracted coffee. SOLUTION: The objective method for preserving coffee comprises the following process: putting extracted coffee 11 into a container 12, keeping it warm by a warmer 13, providing a high potential-generative apparatus 14, and superimposing high voltage between the inside and outside of the container 12 via the warmer 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for storing boiled coffee and an apparatus (coffee warmer) for carrying out the method.

[0002]

2. Description of the Related Art In a coffee shop or the like, for example, a service such as provision of coffee is provided according to a customer's order. In general, instead of receiving an order, the coffee is not boiled. First, a large amount of coffee is boiled in advance, and this is stored by a coffee warmer.

[0003] By the way, various types of coffee warmers have been conventionally provided, but coffee is very easily oxidized when exposed to air, and the quality of the coffee is severely degraded even with the coffee warmer.

Accordingly, an object of the present invention is to provide a storage method capable of storing coffee of good quality for a long time while suppressing the oxidation of coffee, and an apparatus therefor.

[0005]

Means for Solving the Problems The present inventor has found that by applying a high voltage to the boiled coffee, it is possible to suppress the oxidation (deterioration of the quality) of the coffee and store it for a long time.

Therefore, the method for storing coffee according to the present invention is characterized in that the coffee is stored while applying a high voltage to the boiled coffee.

[0007] Storing while applying a high voltage in this way suppresses the oxidation of coffee. In general, the oxidation of coffee can be determined by a change in AV value (Acid Value value).

[0008] The coffee storage device according to the present application includes:
It is characterized by comprising a container for storing the boiled coffee, a heater for heating the coffee in the container, and a high-potential generator for applying a voltage between the inside and the outside of the container.

According to this configuration, the coffee can be kept warm by putting the boiled coffee in the container and heating it with the heater. Moreover, a high voltage can be applied to the boiled coffee by applying a voltage between the inside and the outside of the container by the high potential generating section. Thereby, oxidation of coffee is suppressed. In general, the oxidation of coffee can be determined by a change in AV value (Acid Value value).

[0010]

Embodiments of the present invention will be described below.

FIG. 1 is a schematic diagram showing a configuration of a coffee storage device (coffee warmer) according to one embodiment of the present invention.

Referring to FIG. 1, a storage device 10 includes a container 12 for storing boiled coffee 11,
A heat insulator 13 installed at a lower portion of the container 12;
And a high-potential generator 14 for applying a voltage to the coffee 11 via the power supply.

The coffee 11 is extracted by a usual paper drip method. The container 12 can be made of a desired material as long as it can store the coffee 11. In the present embodiment, a metal material is employed, but it may be made of an insulating material.

The warmer 13 has a main body casing 15 and a heater 16 built therein. As the heater 16, various heaters can be employed as long as the heater 11 can heat the coffee 11 in the container 12. In the present embodiment, an electric heater is employed. That is, the heater 13 is configured by a rod-shaped heating element, and is disposed in the main body casing 15.

FIG. 2 schematically shows the structure of the high potential generator 14.

Referring to FIG. 1, a high potential generator 14 includes:
A body 17 and electrodes 18 are provided.

The main body 17 has a configuration similar to a so-called transformer, and an output voltage V2 can be obtained from the high voltage section 20 by applying the input voltage V1 to the low voltage section 19.
In the present embodiment, the output voltage V2 is 100 V to 5000
It can be freely changed to 0V. The output voltage V2 can be further increased by changing the internal structure of the main body 17.

As shown in the figure, one end of the high voltage unit 20 is connected to the electrode 18 and the other end is open. That is, the other end of the high-pressure unit 20 is separated from the container 12 and the insulated unit 13, and as a result, a kind of capacitor is provided between the electrode 18 and the other end of the high-pressure unit 20 (that is, between the inside and the outside of the container). And the voltage V2 is applied.

Next, the operation and effect of the storage device 10 will be described based on experimental results.

Experiments were conducted on a conventional storage device (without the addition of the high potential generator 14) and the storage device 1 according to the present invention.
Keep the coffee boiled by 0 and keep A
The change in the V value is measured.

Coffee 11 was prepared by extracting key coffee (special blend) by paper drip. The water used was ordinary tap water and was boiled on a gas stove.

For the measurement of the AV value, Ave Check Test Paper (manufactured by Ajinomoto) was used. This test paper detects an AV value based on a change in color.

FIG. 3 is a table summarizing changes in AV values between the case where the conventional storage device (conventional example) is used and the case where the storage device 10 (example) according to the present embodiment is used. .

As shown in the figure, immediately after coffee extraction, the AV value is 3.0 in both the conventional example and the embodiment. However, when reheating was performed one hour after the extraction, the AV value increased to 5.0 in the conventional example, and oxidation of the coffee 11 was clearly advanced, whereas in the example, the AV value was increased. Is 3.0 + α, and oxidation is almost suppressed.
Here, the reason why the measured value is set to 3.0 + α is that the AV value check paper determines the AV value based on a change in color, and the AV value is determined based on the eyes of the tester. In the test, the tester's eyes felt A
This is because although it can be determined that the V value has increased, there was almost no change.

Further, when reheating is performed two hours after the extraction, the AV value has risen to an unmeasurable level in the conventional example, whereas the increase in the AV value is only 3.5 in the example. I have.

In this experiment, reheating after a predetermined period of time from the extraction means that oxidation is more likely to occur when exposed to natural cooling conditions and then reheated than when stored while warming immediately after extraction. This is to confirm that the increase in the AV value is reliably suppressed by the present embodiment.

As described above, according to the storage device of the present embodiment, by storing the extracted coffee 11 while applying a high voltage, the oxidation of the coffee 11 is effectively suppressed, and the quality of the coffee 11 is maintained for a long time. Becomes possible.

[0028]

As described above, according to the present invention, by applying a high voltage to the boiled coffee and storing it, the oxidation of the coffee over time can be suppressed and the quality can be maintained for a long time.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a configuration of a storage device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a configuration of a high potential generating device according to one embodiment of the present invention.

FIG. 3 is a diagram showing an experimental result regarding a change in an AV value.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Storage device 11 Coffee 12 Container 13 Warmer 14 High potential generator 16 Heater

Claims (2)

[Claims] 1. A method for preserving coffee comprising applying a high voltage to the boiled coffee while preserving the coffee. 2. A coffee machine comprising: a container for accommodating boiled coffee; a heater for heating the coffee in the container; and a high-potential generator for applying a voltage between the inside and the outside of the container. Storage device.