JPS6342905Y2 - - 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 is particularly designed to remove 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 conveys the astringent skin and fine powder by the air flow generated by the centrifugal fan effect of the impeller installed on the rotating cutter during coffee bean grinding. The object of the present invention is to provide a coffee mill that can easily and reliably remove the defective components due to the capture structure.

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 on the machine and can be freely attached and detached.
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. Inside the mill lid 7, a space formed by this and the mill case 3 is divided into a chamber A and a chamber B.
A partition plate 8 is removably attached.

A central communication hole K is provided in the center of the partition plate 8 to communicate chambers A and B, and 14 annular walls projecting upward are provided at the periphery of the communication hole K on the chamber A side. There is. 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, a shielding guide 11 is provided which guides the air flow described later from chamber B to A in the opposite direction to the rotational direction of the cutter 4.
is bent downward.

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 13 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 the chamber 13 and accumulate in the chamber A. Therefore, during operation, that is, while grinding coffee beans, the defective components are continuously transferred to the chamber A. Can be captured separately.

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 at 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, it is possible to improve the taste of the coffee, and in particular, there is no need for the difficult and troublesome work of removing defective components from the coffee powder after grinding. is big.

According to this embodiment, since the central communication hole K is configured to open directly above the cutter 4 through the cylinder 9 to the chamber B, 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 also the effect that the coffee beans are ground uniformly.

The embodiments clarified by the above explanation do not indicate the structural limitations of the present invention; in short, the present invention is configured to have a blade portion that rotates together with the cutter to effectively generate an air flow inside the mill case, that is, a configuration that enhances the centrifugal fan effect caused by the rotation of the cutter, and in particular, it is not necessary to have a configuration in which a partition wall is used to form a partitioned space inside the mill case, as long as a space that captures defective coffee bean components transported by the air flow is provided in communication with the space inside the mill case.

As explained above, the present invention uses the centrifugal fan effect of the impeller that rotates together with the cutter when grinding coffee beans to transport defective components such as astringent skin and fine powder in the coffee beans to the space communicating with the internal space of the coffee mill. Since the defective components are separated and captured, the defective components can be easily and reliably removed, and a more delicious coffee liquid can be obtained from the coffee powder from which such defective components have been removed.

In particular, according to the present invention, by providing the cutter with a blade, it is effective in generating airflow more effectively than just the rotation of the cutter itself, which has the advantage of smoothly and reliably transporting defective components. .

[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 the 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, 5... Impeller, 7... Mill lid, 8... Partition plate, A... Room (partition space), B... Room (cutter installation space), H,
K...Communication hole.

Claims (1)

[Scope of utility model registration request] In a coffee mill comprising a cutter for grinding coffee beans that is rotatably driven in a mill case, a blade wheel is provided that rotates together with the cutter to generate an air flow within the mill case, and the blade wheel is provided with a blade wheel that rotates together with the cutter to generate an air flow within the mill case. A coffee mill characterized in that a space for capturing defective components of coffee beans is provided in communication with the space inside the mill case.