JPH02191415A - Drip coffee maker - Google Patents

Abstract

PURPOSE:To easily adsorb odor of chlorine and mold in water to prevent a change in taste when coffee is percolated, by a method wherein a replaceable filter is placed in a water path between a water tank and coffee powder, and the filter consists at least of an activated carbon or activated carbon fiber layer on top and a sheet of filter paper at bottom. CONSTITUTION:Water is poured in a water tank 2, and powdered coffee 5 is put into percolating basket 6 in which a lower filter 10 is placed at bottom. Then, an upper filter 7 is placed on the top of the percolating basket 6. After that, the dripping flow rate is adjusted by controlling a flow control valve 4, and coffee percolating is started. While the water dripping from the flow control valve 4 passes through the upper filter 7, the odor of chlorine and mold in the water is adsorbed by an activated carbon layer 8 of the upper filter 7. Activated carbon fiber produces black powder when it is used alone, however, the black powder is prevented from reaching the coffee powder because a sheet of filter paper 9 is placed under the activated carbon layer. Thus, the taste is not changed as impurities are adsorbed when coffee is percolated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cold brew coffee extractor for extracting coffee by dripping water onto ground coffee beans.

Conventional technology A conventional cold brew coffee brewer fills a water tank with water.
Adjust the flow rate adjustment cock installed at the bottom of the water tank to allow water to drip. Water is dripped onto an extraction container containing ground coffee beans, and the water permeates into the coffee beans, extracting the active ingredients of Toyonaka at a low temperature near room temperature, so that bad ingredients are not extracted. ＜Produces a light coffee extract with less astringency and a pleasant aftertaste. This coffee extract passes through a filter and collects in a coffee storage container.

Problems to be Solved by the Invention However, in a coffee extractor having such a structure, the water used for extracting coffee is usually not heated, so if the water has a chalky odor or a moldy odor, it may be difficult to heat the water. It smells like. For this purpose, water that had been passed through a water purifier or commercially available mineral water was sometimes used. However, in any case, it is time-consuming and expensive, and there is a problem to be solved in that it is necessary to supply water for cold brewing coffee to the coffee extractor more easily.

The present invention aims to solve the above problems.

Means for Solving the Problems In order to achieve the above object, the present invention provides a cold brew coffee extractor in which at least activated carbon or activated carbon fibers are placed on the upper surface and filter paper is placed on the lower surface in the passage of water from the water storage tank to the coffee grounds. The structure includes a replaceable filter.

Function In the above configuration, water in the water storage tank always passes through activated carbon or activated carbon fibers when it is dripped onto coffee grounds.

At this time, chlorine, mold odor, etc. contained in the water are absorbed. Activated carbon or activated carbon fibers produce black powder when used as is, but in the present invention, a filter paper is placed underneath, so that the powder does not reach the coffee powder. Therefore, water suitable for cold brew coffee can be obtained.

Furthermore, it is replaceable and disposable, eliminating concerns about general bacterial growth.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, a water storage tank 1 is filled with water 2 for brewing coffee. This water storage tank 1 is fixed to a support stand 3. A flow rate regulating valve 4 is provided at the bottom of the water storage tank 1. 5 is powdered coffee beans, extraction container 6
It is placed in Upper filter 7 is placed above the coffee beans.
As shown in FIG. 2, this upper filter 7 is composed of an activated carbon layer 8 made of activated carbon fibers and a filter paper 9. 10 is a lower filter, and 11 is a coffee extract storage container.

Next, the operation of this embodiment will be explained.

In FIG. 1, if you want to make 5 cups of cold brew coffee, for example, 650 cc of water 2 is poured into the water tank 1 for 5 cups. Next, an extraction container 6 in which a lower filter 10 is sprinkled with 40 g of moderately crushed beans 5
I can put it in. Then, the upper filter 7 is placed on the extraction container 6. After installing in this manner, the dripping flow rate is adjusted by controlling the opening and closing of the flow rate regulating valve 5, and extraction of cold brew coffee is started. The activated carbon layer 8 of the upper filter 7 adsorbs limescale, mold odor, etc. contained in the water dripped from the flow rate regulating valve 5 by the activated carbon layer 8 of the upper filter 7. Activated carbon fibers produce black powder as they are, but since the filter paper 9 is placed on them, this does not reach the coffee powder. Therefore, when coffee is extracted, its components are adsorbed and the taste does not change. The coffee extract passes through a lower filter 10 and is stored in a coffee extract storage container 11. Water tank 1 is empty,
When the coffee extract stops dripping from the extraction container 6, the extraction ends, and the upper filter 7, beans 5 and lower filter 10 are removed.
is thrown away.

In this way, since it is disposable, there is no need to worry about bacterial growth, unlike activated carbon in water purifiers that are used repeatedly. In particular, cold brew coffee extractors are preferable because they do not require heating or boiling water.

Effects of the Invention As described above, the present invention provides a cold brew coffee extractor having a structure in which a water passage from a water storage tank to coffee powder has a replaceable filter having at least activated carbon or activated carbon fiber on the upper surface and filter paper on the lower surface. Therefore, it easily adsorbs chlorine, mold odor, etc. contained in water, and does not change the taste of coffee when brewing. Furthermore, since it is disposable, there is no need to worry about bacterial growth, unlike activated carbon in water purifiers that are used repeatedly. Additionally, cold brew coffee extractors are preferable because they do not require heating or boiling the water.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a cold brew coffee extractor equipped with an apparatus according to an embodiment of the present invention, and FIG. 2 is a configuration diagram of an upper filter of the same. ■...Water tank, 2...Water, 4...Flow rate adjustment valve, 6...Extraction container, 7...Upper filter, 8...
Activated carbon layer, 9... Filter paper, 10... Lower filter.

Claims (1)

[Claims] A cold brew coffee extractor having a replaceable filter having at least activated carbon or activated carbon fibers on the upper surface and filter paper on the lower surface in the passage of water from the water storage tank to the ground coffee.