JPS62211799A - Extractor/filter for beverage vending machine - 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] Industrial Application Field The present invention does not involve simple cooking in which raw material powder is dissolved in hot water and dispensed, but in which a mixed solution of raw material powder and hot water is filtered through a filter to produce an extract. Concerning cooking method vending machines.

Conventional technologyVending machines that use this type of cooking method include:
Mention may be made of coffee vending machines configured to filter and extract a mixture of coffee powder and hot water.

Conventionally, a coffee vending machine using such a cooking method has been constructed as shown in FIG.

In the extraction chamber 3 whose lower surface is covered by a paper filter 2 pressed against the filtrate receiver 1.

Coffee powder and hot water are introduced through the communication hole 4, and then the valve body 5
to close the communication hole 4 and supply pressurized air 6 from the outside.
is blown into the extraction chamber 3 to pressurize it. As a result, the mixed liquid 7 of coffee powder and hot water is forcibly filtered through the filter 2 due to the pressure difference between the inside and outside of the extraction chamber 3, and the hot water containing the coffee extract is collected in the filtrate receiver and added. The coffee powder from which the coffee extract has been extracted remains on the filter 2, which is discharged along with the pressurized air to the downstream side through the downstream passage 8.

Problems to be Solved by the Invention In such a conventional configuration, since pressure filtration is performed, filtration can be performed in a shorter time than natural filtration. If the height is increased, the center of the filter 2 will bulge downward as shown by the imaginary line in FIG. 3, and there is a risk that the filter 2 will be torn.

As a means to prevent the filter 2 from breaking.

It is conceivable to provide a perforated plate 9 to support the lower surface of the filter 2 as shown in FIG. 2 is effective only in the position above the communication hole 10 of the perforated plate 2, and the filter 2
The actual aperture ratio is halved, resulting in a decrease in filtration rate.

SUMMARY OF THE INVENTION An object of the present invention is to provide an extraction filtration device that can prevent bulging of a filter during pressure filtration and does not cause a decrease in filtration speed.

Means for Solving the Problems The extraction filtration device of the present invention introduces a mixture of raw material powder and hot water into an extraction chamber whose bottom surface is covered with a filter, and pressurizes the inside of the extraction chamber to reduce the pressure inside and outside the extraction chamber. A perforated plate supporting the lower surface of the filter and a perforated plate having a finer mesh than the perforated plate are interposed between the filter and the perforated plate. It is characterized by being provided with a reticulated body.

Effect: According to this configuration, the lower surface of the filter is supported by the perforated plate, and the filter does not come into close contact with the perforated plate but is in contact with it through the mesh, so that the upper part of the perforated plate that is not connected to the perforated plate is The extract also flows from the filter into the communicating holes of the porous plate along the mesh.

EXAMPLE Hereinafter, an example of the present invention will be explained based on FIGS. 1 and 2. Components having the same functions as those in FIGS. 3 and 4 are designated by the same reference numerals and their explanations will be omitted.

FIG. 1 shows the contact portion between the filtrate receiver 1 and the extraction chamber 3 in the extraction filtration apparatus of the present invention, and differs from FIG. 4 in the following points. In other words, between the filter 2 and the perforated plate 9, there are 20
A net-like body 11 knitted into a mesh is interposed.

With this configuration, the bulge of the filter 2 during pressure filtration is supported by the perforated plate 9, and the extract only flows down in the direction of arrow A from above the communication hole 10 of the perforated plate 9 through the filter 2. Rather, the flow path is formed by the opening of the net-like body 110.

It also flows from the upper position of the part of the perforated plate 9 that is not the communication hole 1O through the filter 2 to the adjacent communication hole 10 as shown by the arrow B, and when the perforated plate 9 is the same, the flow of the filter 2 is lower than that of the conventional case. The effective aperture ratio increases.

Decrease in filtration rate due to the provision of the perforated plate 9 can be significantly reduced.

Effects of the Invention As explained above, in the extraction filtration device of the present invention, the filter is supported by the perforated plate through the mesh body.

Swelling of the filter during pressure filtration in the extraction chamber can be prevented by supporting it with a perforated plate, and in addition, the filter located in a part of the perforated plate other than the communicating hole position can also be prevented from proximal to the perforated plate through the mesh body. Since a flow path with the communication hole is formed, a decrease in the aperture ratio due to the provision of the perforated plate can be minimized, and rapid sales can be realized through pressure filtration.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the main part of the extraction filtration device of the present invention, Fig. 2 is an enlarged view of the main part of Fig. 1, Fig. 3 is a longitudinal sectional view of the conventional extraction filtration device, and Fig. 4 is another conventional extraction filtration device. It is a sectional view of the main part of an example. 2... Filter, 3... Extraction chamber, 6... Pressurized air, 7... Mixed liquid, 9... Porous plate, 1o... Communication hole, 11... Network agent Yoshihiro MorimotoFigure 7Figure 2Figure 3Figure 4

Claims (1)

[Claims] 1. A mixture of raw material powder and hot water is put into an extraction chamber whose bottom surface is covered with a filter, and the interior of the extraction chamber is pressurized so that the mixture is forcibly filtered through the filter due to the pressure difference between the outside and outside of the extraction chamber. an extraction filtration device for a vending machine, comprising: a perforated plate supporting the lower surface of the filter; and a net-like body interposed between the filter and the perforated plate, the mesh being finer than the perforated plate. .