JPH0341167B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a coffee mill that grinds coffee beans placed in a mill case using a rotatably driven cutter, and is equipped with a recovery device that captures defective components such as astringent skin and fine powder during grinding of coffee beans. This is about a coffee grinder.

The following conditions are generally known as the conditions for extracting delicious coffee. Removes the astringent skin called silver skin that remains on some coffee beans. Removes fine powder produced during grinding. In addition, during pulverization, the powder should be heated as little as possible to prevent oxidation. Conventional coffee mills equipped with an astringent peel and fine powder recovery device utilize the centrifugal fan effect of the rotating cutter itself, but this method uses a blade wheel as part of the cutter to grind coffee beans and grind them. Since the method creates airflow at the same time as stirring coffee powder, the ratio of astringent skin and fine powder removed changes depending on whether the amount of coffee beans being ground is large or small. In other words, when grinding beans for 5 cups and 2 cups, for example, when grinding beans for 5 cups, the amount of air resistance caused by the movement of the beans and beans due to the centrifugal effect of the cutter is reduced, making it easier to remove astringent skin and fine powder. In addition, when the amount of beans is small (2 cups), the stirring of the beans and the air convection become stronger, and the amount removed increases. In this way, the recovery effect of the astringent skin and fine powder was low, and since the coffee powder was directly agitated by the impeller, a lot of frictional heat was generated, making it impossible to heat the coffee powder and grind the coffee beans to a good quality. .

The present invention has been made to eliminate the above drawbacks, and includes a first space formed by a mill case and a mill lid, a second space formed by a lid case provided on the top of the mill lid and the mill lid, and a second space formed by the mill lid. By forming a communication hole that communicates with the second space, a rotating body with a cutter attached to the communication hole, and a turbo-type centrifugal fan above the axis of this rotating body, the cutter can By simply grinding the coffee beans, the volume of the first space can be reduced, and by placing the cutter and the centrifugal fan in separate positions and correspondingly positioning the centrifugal fan and the communication hole, Through the communication hole, the optimal airflow for collecting astringent skin and fine powder can be obtained, and the air convection has good cooling efficiency for coffee grounds, allowing for effective collection of astringent skin and fine powder, and good grinding of coffee beans. It's about giving what you get.

Embodiments of the present invention will be described below with reference to the drawings.

The structure of the embodiment is shown in FIGS. 1 to 7, and 1 is the main body of a drip type coffee maker. A motor 2 is disposed inside the main body 1, and the coffee mill main body 3 is configured to be detachably set above the motor 2. The coffee mill main body 3 is engaged with the substantially cylindrical wall 4 of the main body 1 and is detachably fixed, and a motor shaft 5 and a coupling ring 6 are connected, and the coffee mill main body 3 is pressed by a mill button 13 attached to the upper part of the coffee mill main body 3. It is constructed so that the rotation of the motor 2 is transmitted to the coffee mill main body 3. The main body 1 also has a tank 8 containing water 7, and by operating a switch 9, coffee beans 38 are ground, the water 7 is heated to boiling, and the water is spouted from a spout 10. Reference numeral 11 is a cup for receiving coffee liquid, and reference numeral 12 is a coffee basket placed on top of the cup 11 to extract coffee. In addition, the coffee mill main body 3 forms a first space 17 with a mill case 14 and a mill lid 15, and a cutter 19, which will be described later, is installed inside this space.
A second space 18 is formed by the mill lid 15 and a lid case 16 which is fitted into the upper part of the mill lid 15 and is detachably provided. A rotary body 21 connected to the coupling ring 6 is rotatably arranged in the first space 17. A cutter 19 for crushing coffee beans 38 is attached to the lower part of the rotary body 21, and the axis of the rotary body 21 is A turbo centrifugal fan 20 is provided at the top. A mill lid 15 is removably engaged with the upper portion of the mill case 14 having a substantially circular cross section, and a lid case 16 is removably engaged with the upper portion of the mill lid 15. The upper part of the mill lid 15 has a ring-shaped step wall 22 in contact with the inner side, and a flat wall 24 in the center with a conical wall 23 interposed therebetween.
An inner cylinder 26 having a communication hole 25 that communicates the space 17 and the second space 18 is formed protrudingly.
An outer cylinder 27 that opens to the first space 17 is provided on the flat wall 24 at the outer periphery of the flat wall 24, and a doughnut-shaped space A 28 that opens to the first space 17 is formed by the inner cylinder 26, the outer cylinder 27, and the flat wall 24. It is formed. The conical wall 23, the flat wall 24, and the outer cylinder 27
A B space 29 with a substantially trapezoidal cross section is formed which opens into the space 17, and an outer cylinder 27 is formed in the upper part of the first space 17.
A C space 29' is formed outside the step wall 22 and the mill lid 15 and communicates with the B space 29. Furthermore, a hole 30 that communicates the B space 29 and the second space 18 is provided in a part of the conical wall 23, and a plate-like wall 31 is provided at a lower portion corresponding to the hole 30. This plate-like wall 31 is an extension of the step wall 22 and is connected to the outer cylinder 27. In addition, a slit-like hole 32 is provided on the surface of the flat wall 24 to connect the B space 29 and the communication hole 25 and to penetrate from the front surface to the back surface of the flat wall 24. Two spaces 18 are made to communicate with each other.
A wall 33 is provided on the outer periphery of the upper surface of the mill lid 15, a protrusion 34 is formed protrudingly on a part of the outer periphery, and a recess 35 is provided on a part of the lid case 16 corresponding to this position. The lid case 16 can be detachably attached. In the centrifugal fan 20 of the present invention, the upper surface portion 36 and the lower end portion 37 of the inner cylinder 26, that is, the communication hole 25, correspond to each other at the axial center and are disposed close to each other.

The operation of this embodiment based on the above configuration will be explained below. First, coffee beans 38 are placed in the coffee mill body 3, and the coffee mill body 3 is set in the body 1. Fill the tank 8 with water 7, turn the switch 9 to the mill display side, and the motor 2 will be energized and rotated for the time that the mill button 13 is pressed, and the coffee beans 3
Crush 8. As time passes, the astringent skin 40 and the fruit 39 of the coffee beans 38 shown in FIG. 6 separate and become finer. When the mill button 13 is released, the power supply to the motor 2 is stopped. Transfer the coffee grounds in the coffee mill body 3 to the basket 12 and turn the switch 9 to the drip side to turn on the heater (not shown), causing the water 7 to turn into boiling water and drip from the spout hole 10, causing the water in the basket 12 to flow. Coffee liquid is extracted from coffee powder and stored in a cup 11. Here, the grinding of the coffee beans 38 will be explained in detail. Since the centrifugal fan 20 is positioned above the coffee beans 38 placed in the mill case 14 due to the rotation of the rotating body 21, the coffee beans 38
It is pulverized by the cutter 19 located at the bottom without being directly stirred, regardless of the amount. Due to the centrifugal effect of the cutter 19, the coffee beans 38 and coffee powder/astringency 40 rotate in the same direction as the rotation direction D of the cutter 19 as shown in FIG.
It rises along the inner wall surface of the mill case 14 as shown by the dotted arrow S, and large grains move up to the mill case 1 on the way.
4. The small particles fall downward and rise to the step wall 22.
It hits and falls in the same way as above. By repeating this process, the coffee beans 38 are ground. At the same time, as the centrifugal fan 20 rotates, an airflow is generated in the first space 17 in the same direction as the rotational direction D of the rotating body 21, and an airflow is generated as shown by the solid arrow W. That is, first space 17, A space 28, B space 29,
A rotating air flow is generated in the C space 29', and a turbo-type centrifugal fan 20 and the inner cylinder 26
This causes air convection to flow through the communication hole 25. That is, first space 17, C space 29', B space 2
Air flow circulates in the order of 9, hole 30, second space 18, and communication hole 25, and A space 28, slit-shaped hole 3.
2. Airflow circulating with the communication hole 25 is generated. By pulverizing the coffee beans 38 by the cutter 19 and air convection by the centrifugal fan 20, C.
In the vicinity of the space 29', the coffee powder rises on the inner surface of the mill lid 15 while rotating in the same direction as the rotational direction D of the rotating body 21, hits the step wall 22, falls downward near the middle part, and Near the outer periphery of the outer cylinder 27, the airflow slowly rises, and the coffee grains and astringent skin 40/fine powder are separated, and the heavy grains are pushed toward the inner wall of the mill case 14, and the light astringent skin 40/fine powder is moved downward.
The fine powder component is transported from the hole 30 to the second space 18 while rotating in the B space 29, and is separated and captured on the upper surface of the mill lid 15 by the deceleration of the air flow, and
Due to the synergistic effect of the air flow flowing into the second space 18 from the space 28 through the slit-like hole 32 in a film-like manner and the air flow jetting out from the hole 30, particularly light astringent skin and
The fine powder can be collected by adhering to the entire inner surface of the lid case 16. Also, at this time, the outer cylinder 27 creates a C space 29', thereby allowing the centrifugal fan 2
0 directly from the hole 30 to the second space 1
This is to prevent the coffee particles from being ejected into the coffee particles 8, and to create an air flow that rises gently and smoothly along the outer circumferential surface of the outer cylinder 27, which has the effect of enhancing the effect of the coffee grains, astringent skin, and fine powder in the C space 29'. At the same time, when the coffee beans 38 or large granular coffee powder that are blown away by the rotation of the cutter 19 hit the centrifugal fan 20 and are blown away, they are directly
This is configured to prevent the second space 18 from entering from zero. Therefore, the plate-like wall 31 has holes 30
The hole 30 corresponds to the opening surface of the hole 30, and the area from the top surface almost corresponds to the area of the hole 30. This prevents coffee beans 38 and granular powder that move irregularly from within the first space 17 from directly passing through the hole 30 and jumping into the second space 18. After grinding the coffee beans 38 as described above, the mill lid 15 and the lid case 16 are removed from the mill case 14 at the same time, and the particulate coffee powder inside the mill case 14 is taken out and used.
Defective components such as astringent skin and fine powder captured in the second space 18 can be disposed of by removing the mill lid 15 and lid case 16.

According to the present invention, a first space having a cutter, a second space formed above the first space, a communication hole communicating the first space and the second space formed, and a rotating body to which the cutter is attached. A turbo-type centrifugal fan is installed on the top of the coaxial center, and the upper surface of the centrifugal fan corresponds to the communication hole and is placed close to the communication hole, so that the cutter only grinds coffee beans. By doing this, the volume of the first space can be reduced, and by placing the cutter and centrifugal fan in different positions and correspondingly positioning the centrifugal fan and the communication hole, it is possible to collect astringent skin and fine powder through the communication hole. Optimal air flow can be obtained, and the air flow has good cooling efficiency for the coffee grounds.Also, due to the centrifugal force, the coffee grounds are separated from heavier particles outwards, and lighter and smaller particles closer to the center, i.e. astringent skin and fine powder. It has the effect of being able to effectively collect and grind coffee beans in a good manner.

[Brief explanation of drawings]

Fig. 1 is a front view of a drip coffee maker equipped with a coffee mill showing an embodiment of the present invention, shown in cross section, Fig. 2 is a sectional view of essential parts of the coffee mill, and Fig. 3 is a cross-sectional view of the coffee mill. 4 is an exploded perspective view of the main parts of the same coffee mill, FIG. 5 is a top view of the mill lid of the same coffee mill, and FIG. 6 is a diagram of the coffee beans used in the coffee mill. A sectional view, FIG. 7 is a sectional view of a main part of the same coffee mill (explanation of convection). 14... Mill case, 15... Mill lid, 16
... Lid case, 17 ... First space, 18 ... Second space, 19 ... Cutter, 20 ... Centrifugal fan, 21 ... Rotating body, 25 ... Communication hole.

Claims (1)

[Claims] 1. In a coffee mill equipped with a mill case with a cutter inside and a mill lid on the top of the mill case, a first space 17 formed by the mill case 14 and the mill lid 15, and a lid case 16 provided on the top of the mill lid 15 and the mill lid. 15 and a communication hole 25 that communicates the first space 17 and the second space 18, and an outer peripheral portion of the inner cylinder 26 having the communication hole 25 is opened to the first space 17. An outer cylinder 27 is provided, and an outer cylinder 27 and an inner cylinder 26 are provided.
A hole 32 is provided that communicates the A space 28 formed by the second space 18, and a hole 30 is provided that communicates the C space 29' formed on the outer periphery of the outer cylinder 27 and the second space 18, and A rotating body 21 with a cutter 19 attached corresponding to the communication hole 25, and a turbo centrifugal fan 20 above the axis of the rotating body 21.
A coffee mill characterized by being equipped with.