JPS6359692B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coffee mill that grinds coffee beans placed in a mill case using a rotatably driven cutter, and in particular removes unnecessary defective components from coffee beans during grinding of the coffee beans. Regarding coffee mills.

It is generally accepted that using freshly ground coffee powder is necessary to extract delicious coffee, but in order to improve the taste, it is necessary to use freshly ground coffee powder to extract delicious coffee. It is essential for Sato to remove unnecessary and defective components.

In particular, the astringent skin called silver skin, which is a component of coffee beans, and the fine powder produced by grinding impair the original taste of coffee, so so-called specialty shops remove this astringent skin and fine powder. Some places even extract coffee liquid.

However, in conventional coffee mills used in general households, the whole coffee bean is ground at once, so the astringent skin and fine powder are uniformly mixed into the ground coffee powder.
Separation after crushing was extremely difficult and troublesome. Therefore, in view of the conventional situation as described above, the present invention has a structure in which the astringent skin and fine powder are transported and captured by the air flow generated by the centrifugal fan effect of the rotating cutter itself during coffee bean grinding. This provides a coffee mill that can easily and reliably remove the defective components.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 4.

In Figures 1 to 3, 1 is a motor case with a built-in motor 2 for rotationally driving a cutter for grinding coffee beans, which will be described later. The attached mill case 3 is placed thereon in a detachable manner, and the rotation of the motor 2 is transmitted to the cutter 4 through couplings 6 and 6'. Reference numeral 7 denotes a mill lid that is removably fitted to the mill case 3, and a partition plate 8 that partitions the space formed by this and the mill case 3 into a chamber A and a chamber B is detachably attached to the inside of the mill lid 7. It is being

A central communication hole K is provided in the center of the partition plate 8 to communicate chambers A and B, and the periphery of the communication hole K on the chamber A side projects upward and is provided with 14 annular walls. . Further, the periphery of the communication hole K on the chamber B side extends downward to form a cylinder 9, and faces directly above the cutter 4.

On the chamber B side of the partition plate 8, ten air flow guides are provided which curve from the outer circumference toward the center according to the rotational direction of the cutter 4 shown in FIG. A peripheral communication hole H that communicates A and B is provided. Furthermore, this communication hole H
A shielding guide 11 is bent downward and guides an air flow from chamber B to A, which will be described later, in a direction opposite to the direction of rotation of the cutter 4.

On the other hand, reference numeral 5 denotes a blade wheel formed by bending downward in a part of the cutter 4, which effectively creates an air flow upward in the chamber B when the cutter 4 rotates.

Next, the coffee bean grinding process and defective component removal process of the coffee mill having the above configuration will be explained.

First, after placing coffee beans in the mill case 3 and setting each part as shown in Fig. 1, the motor 2 is energized and the cutter 4 is rotated at high speed, and the coffee beans are ground by the cutter 4. . When grinding begins, the astringent skin 12 of the coffee beans shown in Figure 4
and fruit 13 separate, and both become thinner as time passes.

The airflow created by the centrifugal fan effect of the impeller 5 as the cutter 4 rotates occurs as shown by arrows P and Q in the figure.

That is, the coffee beans in the grinding process rotate in the chamber B in the same direction as the rotational direction C of the cutter 4 while colliding with the guide 10.

When the extremely light astringent skin and fine powder of the fruit reach the end E of the guide 10, the direction is changed by the airflow flowing from chamber B to A through the peripheral communication hole H, and the defective components are carried into chamber A. It will be done. The airflow flowing into the chamber A passes through the central communication hole K of the partition plate 8 and returns to the chamber B, forming a circulating flow, but the airflow after passing through the peripheral communication hole H is decelerated, and the airflow returns to the chamber B through the central communication hole K of the partition plate 8. Due to the annular wall 14 around the hole K, defective components such as astringent skin do not return to chamber B and accumulate in chamber A. Therefore, defective components are continuously separated into chamber A during operation, that is, while grinding coffee beans. Can be captured.

Even when the large particulate coffee powder required for extraction of coffee liquid reaches the end E of the guide 10, its inertia continues to move in the same direction as the rotation of the cutter 4, and it is carried into the chamber A by the air flow. It is deposited on the bottom of chamber B without any problem.

After grinding the coffee beans as described above, the mill lid 7 is removed from the mill case 3 and the particulate coffee powder inside the mill case 3 is taken out and used. The components can be disposed of by removing the partition plate 8 from inside the mill lid 7.

According to the above configuration, the astringent skin and fine powder of the coffee beans can be efficiently separated and captured by the air flow generated by the rotation of the cutter 4 when the coffee beans are ground into the partitioned space A, which improves the deliciousness of the coffee. Since it is possible to remove unnecessary defective components, the taste of the coffee can be further improved.In particular, the difficult and troublesome work of removing defective components from the ground coffee powder is not necessary. It's big.

According to this embodiment, the central communication hole K is configured to open directly above the cutter 4 through the cylinder 9 with respect to the chamber B, so that the centrifugal fan effect of the impeller 5 can be greatly enhanced. In addition, since a shielding guide 11 is provided below the peripheral communication hole H of the partition plate 8, the coffee particles blown away by the cutter 4 and the impeller 5 directly flow into the chamber A immediately after the start of coffee bean grinding. The air flow from chamber B to chamber A through the communication hole H can be made smooth without flying into the air, and defective components can be efficiently captured. Furthermore, since the coffee beans in the chamber B are stirred by the guide 10 from the outside toward the center, there is an effect that the coffee beans are ground uniformly.

The embodiments clarified by the above explanation do not indicate any structural limitations of the present invention, and in short, the present invention has a partition wall in the mill case on the side opposite to the cutter installation space in the cutter axial direction. A configuration in which a space is provided that is partitioned into a space that can communicate with the space, and an air flow guide is provided that guides airflow generated as the cutter rotates in the direction of cutter rotation toward a communication portion between the cutter installation space and the partitioned space. Any configuration is acceptable as long as the cutter is not provided with a blade wheel, and the defective components are transported to the partitioned space and separated and captured by the centrifugal fan effect accompanying the rotation of the cutter itself.

As explained above, the present invention provides a space in the coffee mill that is separated from the cutter installation space, and uses the centrifugal fan effect of the cutter that rotates during coffee bean grinding to cause the astringent skin and fine powder in the coffee beans to be stored in this space. Since the defective components are transported and separated and captured, the defective components can be easily and reliably removed, and coffee powder from which such defective components have been removed can yield a more delicious coffee liquid.

In particular, the present invention provides a guide that guides the airflow generated as the cutter rotates in the direction of the cutter rotation toward the communication part between the cutter installation space and the partition space, so that the airflow is smoothly formed and the cutter installation space is It is possible to improve the ability to transport defective components from the container to the partitioned space, and improve the ability to separate and capture the defective components.

Further, by providing the guide, the coffee beans in the cutter installation space are agitated from the outer circumferential wall of the space toward the center, so that the coffee beans are ground more uniformly.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing the structure of the coffee mill according to the present invention, Fig. 2 is an exploded perspective view of the same coffee mill, Fig. 3 is a plan view of a partition plate in the above coffee mill, and Fig. 4 is It is a cross-sectional diagram of coffee beans. 3... Mill case, 4... Cutter, 7... Mill lid, 8... Partition plate, 10... Air flow guide,
A... Room (partition space), B... Room (cutter installation space), H, K... Communication holes.

Claims (1)

[Claims] 1. A coffee mill in which a rotationally driven cutter for grinding coffee beans is installed in a mill case, and the cutter installation space is partitioned into a side opposite to the cutter installation space by a partition wall in the cutter axial direction. A space that can communicate with the cutter space is provided, and the space is used as a capture space for defective components of coffee beans carried by the air flow generated as the cutter rotates. A coffee mill characterized by being provided with an air flow guide that guides the cutter in the direction of rotation toward the communication part.