JPS6359693B2 - - 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. Some places even extract the liquid.

However, in conventional coffee mills used in households, etc., 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.

In view of the above-mentioned conventional circumstances, the present invention has a structure in which the astringent skin and fine powder are conveyed and captured by the air flow generated by the centrifugal fan effect of the rotating cutter itself during coffee bean grinding. The present invention 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, reference numeral 1 denotes 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 to which the mill case 3 is removably fitted, and a partition plate 8 is removably attached inside the mill lid 7 to partition the space formed by this and the mill case 3 into a chamber A and a chamber B. ing.

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, there are provided 10 guides that 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 communicating with B is provided. Further, in this communication hole H, an air flow guide 11 is bent downward and guides an air flow described later from chamber B to A in a direction opposite to the direction of rotation of the cutter 4.

Note that this air flow guide 11 is configured to also have the effect of shielding coffee particles that are blown away immediately after coffee beans are ground, which will be described later.

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 in 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 connected to the chamber B.
On the other hand, since it is configured to open directly above the cutter 4 through the cylinder 9, the centrifugal fan effect of the impeller 5 can be greatly enhanced. In addition, an air flow guide 11 with a function of shielding coffee particles is provided below the peripheral communication hole H of the partition plate 8, so that coffee particles are blown away by the cutter 4 and the impeller 5 immediately after the start of grinding. Coffee particles do not directly jump into chamber A, and flow from chamber B to chamber A through communication hole H.
It is possible to make the air flow toward the air smoother, and to efficiently capture defective components. 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 space is provided that is partitioned into a space and can be communicated with the space, and the airflow generated as the cutter rotates is guided from a communication portion between the cutter installation space and the partitioned space toward the partitioned space in a direction opposite to the direction of rotation of the cutter. Any configuration may be sufficient as long as it is provided with an air flow guide that allows the cutter to rotate, or the cutter may not be provided with an impeller, but may be configured so that the defective components are conveyed to the partitioned space 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 air flow generated as the cutter rotates from the communication part between the cutter installation space and the partition space toward the partition space in the opposite direction to the cutter rotation direction. It is possible to decelerate the defective components after passing through and create a smooth flow that makes it easier to capture them in the partition space, and conversely, it has the effect of returning the large particulate coffee powder necessary for coffee extraction to the cutter installation space without capturing it. Therefore, the ability to separate and capture defective components can be improved.

[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, 11... Air flow guide,
A... Room (partition space), B... Room (cutter installation space), H, K... Communication holes.

Claims (1)

[Claims] 1. In a coffee mill in which a rotationally driven cutter for grinding coffee beans is installed in a mill case, the cutter installation space is partitioned into a side opposite to the cutter installation space in the cutter axial direction by a partition wall, and Create a space that can communicate with other spaces,
The space is used as a space for capturing defective components of coffee beans carried by the air flow generated as the cutter rotates, and the air flow is directed from a communication portion between the cutter installation space and the partition space to the partition space. A coffee mill characterized by being provided with an air flow guide that guides the cutter in a direction opposite to the rotational direction of the cutter.