JPS61176315A - Extraction of beverage - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for extracting a beverage, for example, by brewing powdered coffee raw materials in boiling water and extracting the resulting mixture through an extract T-filter.

[Technical background of the invention and its problems]

In recent years, coffee vending machines installed in stores etc. grind coffee beans to make so-called regular coffee powder, and each time a coin is inserted, the coffee is brewed in boiling water to produce high-quality, flavorful coffee. A system for producing and selling coffee has been developed.

Such a vending machine is equipped with a beverage extraction device within its main body, and is constructed as shown in FIG. In other words, 1 is a lower cylinder, and 2 is an upper cylinder. Both of these cylinders are formed in a cylindrical shape, and the upper cylinder 2 is supported so as to be able to move up and down. This upper cylinder 2 holds a freely movable filter 3 at the upper end of the lower cylinder 1. They are closely connected. Lower cylinder 1
A piston 5 that moves up and down in conjunction with the motor 4 is tightly inserted into the inside of the lower cylinder 10, and a discharge port 6 is formed at the lower part of the circumferential wall of the lower cylinder 10. On the other hand, above the upper cylinder 2, a raw material supply mechanism 7 and a hot water supply mechanism 8 are arranged.

However, in the coffee sales standby state, the piston 5 faces the starting position slightly above the discharge port 6,
When a coin is inserted from this state, coffee powder raw material is supplied from the raw material supply mechanism 7 to the inside of the upper cylinder 2, and hot water is supplied from the hot water supply mechanism 8 to the inside of the upper cylinder 2.Furthermore, the motor 4 is started and the piston 5 is gradually moved. (Figure 4a)
. As the piston 5 rises, the air in the cylinder 1 is pushed out through the filter 3 into the upper cylinder 2, and this air stirs and mixes the raw material in the upper cylinder 2 and the hot water, and the raw materials are brewed (see figure b). . After the piston 5 reaches the top dead center, it descends, and due to the negative pressure suction force in the lower cylinder 1 accompanying this descent, the extracted raw material in the upper cylinder 2 passes through the filter 3 into the lower cylinder 1. It is aspirated (c, d in the same figure).

When the piston 5 reaches the bottom dead center below the outlet θ, the coffee is discharged from the lower cylinder 1 through the outlet 6, poured into the cup set in the vending outlet of the vending machine, and then The piston 5 rises slightly from the bottom dead center and returns to its initial position, and during this operation, the upper cylinder 2 temporarily rises, and the area around the raw material residue remaining on the upper surface of the filter 3 is released. At the same time, the filter 3 travels a certain distance and the raw material is removed from the upper end of the lower cylinder 1 (see e in the same figure).

By the way, conventionally, from the viewpoint of shortening the time of such an extraction stroke, the piston 5 is continuously lowered from the top dead center to the bottom dead center at a relatively high speed. However, with such an operation, the piston 5 quickly reaches the bottom dead center, and at this point air flows into the lower cylinder 1 through the exhaust port 6, and the negative pressure state in the lower cylinder 1 is immediately canceled out. One step of the extraction operation often ends before sufficient suction of the extract is achieved.

In such a case, not only will the amount of extract sucked by the piston 5 decrease, but a large amount of water will remain in the raw material residue on the filter 3. If the extract is sufficiently suctioned, the amount of moisture remaining in the raw material dregs is small, and therefore, as the upper cylinder 2 rises, the raw material dregs will become flat and almost uniform in thickness formed by the inner circumference of the upper cylinder 2. It remains in a solid state, and as the filter 3 moves, it is removed from the upper end of the lower cylinder 1 to the side thereof. However, as mentioned above, if a large amount of moisture remains in the raw material dregs, the original shape of the raw material dregs will collapse as the upper cylinder 2 rises, and this, together with the moisture containing the extract, will spread to the width of the filter 3 and flow out. They are scattered and fall from the top of the filter 3 while the filter 3 is running, contaminating the extraction device and causing unsanitary conditions. If such a condition is not noticed, the raw material particles will get stuck in various parts of the extractor, making cleaning difficult.

[Purpose of the invention]

This invention was made with attention to these points, and its purpose is to sufficiently absorb the extract from the raw material, reduce the amount of moisture remaining in the raw material scraps, and accurately collect the raw material scraps. The object of the present invention is to provide a method for extracting beverages that can be eliminated.

[Summary of the invention]

That is, in this invention, when the piston is lowered to suck the extract of the raw material, the downward movement is temporarily stopped or decelerated, and by this means, sufficient extract is suctioned from the raw material and remains in the raw material dregs. It is designed to reduce the amount of water. Conventionally, a technical means has been known in which the operation of the piston is stopped at time i when the piston is raised in order to increase the concentration of the extract.However, this invention reduces the amount of water remaining in the raw material waste, The feature is that the downward movement of the piston is controlled in order to prevent the scattering of.

[Embodiments of the Invention] Embodiment 1 As shown in the operation explanatory diagram of FIG. 1, first, the upper cylinder 2
In addition to supplying coffee powder raw materials and hot water to the
The motor 4 is energized and the piston 5 is raised from the starting position. Then, while the piston 5 passes through the top dead center and shifts to the downward movement, before the piston 5 reaches the level position of the discharge port 6, the power to the motor 4 is cut off by the control of a timer, etc. Stops the descending operation for a certain period of time. Thereafter, the power supply to the motor 4 is restarted, and the piston 5 is lowered again, passing through the bottom dead center and returning to the original starting position.

Here, for example, the raw material (t: IOg, boiling water: 140
cc, water temperature: 95°C, filter mesh roughness: water permeability of 4000C/min, one stroke time of the piston 5 is 15 seconds, and the stop time of the piston 5 is 2.0 to 2.5 seconds. Seconds.

According to such an operation, as the piston 5 descends, the inside of the lower cylinder 1 becomes negative pressure, but since the piston 5 temporarily stops, the duration of the negative pressure state becomes correspondingly longer, and therefore the extract is reduced. Suction is sufficiently achieved and the amount of moisture remaining in the raw material waste is reduced.

Embodiment 2 As shown in the operation explanatory diagram of FIG. Example 1. Similarly, the piston 5 is temporarily stopped.

In such a case, by temporarily stopping the piston 5 at the top dead center, the contact time between the raw material and the hot water in the upper cylinder 2 is longer, which facilitates the elution of the extract, resulting in a more highly concentrated extract. It has the advantage that it can be extracted.

Embodiment 3 As shown in the operation explanatory diagram of FIG. 3, the speed of the piston 5 when it descends is made slower than the speed when it rises. This control is performed using, for example, an eccentric cam mechanism.

Even in such an operation, Example 1. and Example 2
．． As in the case of , the lowering speed of the piston 5 is slower, the duration of the negative pressure state in the cylinder 1 is longer, and the amount of water remaining in the raw material residue is reduced.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to reduce the amount of water remaining in the raw material scraps, and therefore, even if the upper cylinder rises, the raw material scraps remaining on the filter can be maintained in approximately the same shape. Therefore, as the filter travels, raw material residue can be accurately removed, preventing problems such as contamination of the surrounding area of the extraction device, and keeping the surrounding area clean at all times. Since the extract can be effectively sucked by the negative suction force within the cylinder, it is possible to obtain a large amount of extract in one extraction process.

[Brief explanation of drawings]

FIGS. 1, 2, and 3 are explanatory diagrams of operations in different embodiments of the present invention, and FIG. 4 is sectional views sequentially showing the operations of the beverage extraction device. 1... Lower cylinder, 2... Upper cylinder, 3... Filter, 5... Piston, 6... Discharge port. Applicant's agent Patent attorney Takehiko Penko Figure 3 Figure 4 (a) (b) (c) (d)
(e)

Claims (1)

[Claims] A movable filter is interposed between the upper and lower cylinders, raw materials and hot water are supplied into the upper cylinder, and the piston in the lower cylinder is raised to push the air in the lower cylinder through the filter, and this air is used to remove the raw materials and hot water. The hot water is stirred and mixed, and then the piston is lowered, and the corresponding negative pressure suction force in the lower cylinder sucks the extract of the raw material through the filter into the lower cylinder, and this extract is discharged from the discharge port of the lower cylinder. , when the upper cylinder is raised to release the area around the raw material scraps on the filter, and the filter is run to remove the raw material scraps from the upper end of the lower cylinder, the lowering movement is temporarily stopped when the piston is lowered. , a method for brewing beverages characterized by slowing down.