JPS63102723A - Electric coffee brewer - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric coffee brewer for automatically and continuously grinding coffee beans and extracting coffee liquid.

2. Description of the Related Art In general, this type of electric coffee boiler has a structure as shown in FIG. 4, as disclosed in, for example, Japanese Utility Model Application Publication No. 59-10734.

That is, a motor 2 is disposed on the upper part of the main body 1, and a blade-shaped grinding body 4 for grinding coffee beans is attached to a rotary shaft 3 of the motor 2 that projects vertically downward. A hopper 5 for storing coffee beans was provided below the motor 2, and the grinding body 4 was rotatably installed in the hopper 5.

A blowout port 6 having a plurality of small holes was provided at the bottom of the hopper 6, and a basket 7 was provided below the blowout port 6 to store the coffee powder produced by the hopper 5.

Problems to be Solved by the Invention However, in the above-mentioned conventional configuration, all the coffee beans are stored in the hopper 5 at once and are ground by the grinding body 4 at the same time. In addition, the motor 2 that rotationally drives the grinder 4 needs to have a large starting torque to grind a large amount of coffee beans at once, and if the coffee beans are stored in excess of the allowable amount, However, there was a problem in that the rotating shaft 3 was locked, and as a result, the motor 2 was damaged due to overload. Another problem is that the grinding noise becomes extremely loud as a large amount of coffee beans are ground.

The present invention solves the above-mentioned conventional problems, and aims to provide an electric coffee boiler that is small in size, generates little noise when grinding coffee beans, and does not damage the motor.

Means for Solving the Problems In order to achieve the above object, the electric coffee boiler of the present invention includes a motor having a rotating shaft arranged in a substantially horizontal direction, a hopper for storing coffee beans, and a hopper that is rotated by the motor. The hopper includes a grinding chamber containing a driven blade-shaped grinding body and a basket for storing coffee powder produced in the grinding chamber, and a coffee bean inlet opening in the direction of the rotation axis is formed at the bottom of the hopper. At the same time, the bottom surface of the hopper is sloped downward from the inner surface toward the coffee bean inlet, and an air outlet having a plurality of small holes is provided at the bottom of the grinding chamber, and the grinding chamber extends into the grinding chamber. The coffee beans are stored and ground only below the rotating shaft.

According to the above structure, a part of the coffee beans stored in the hopper is stored in the grinding chamber through the coffee bean input port, and the coffee beans stored in the grinding chamber are ground by the grinding body. Further, the coffee beans in the grinding chamber are ground by the grinding body, and as the grinding progresses, the coffee beans are supplied from the hopper to the grinding chamber. Therefore, the shape of the crushing body can be made smaller, and the starting torque of the motor can be set smaller.
The device can be made smaller. Furthermore, since the amount of coffee beans to be ground at one time is small, the motor will not be damaged due to overload, and the noise during grinding will also be reduced. -Explained with reference to FIG.

In the figure, 8 is a main body, a motor 9 is provided on the upper part of this main body 8, a rotating shaft 1° of this motor 9 is arranged in the horizontal direction, and a blade for crushing coffee beans is attached to this rotating shaft 10. A crushing body 11 of a shape is attached. A hopper 12 for storing coffee beans is disposed at the center of the upper part of the main body 8, and a hopper lid 13 is attached to the upper opening of the hopper 12. A steam hole 14 is formed in this hopper lid 13, and a hinge 1 is formed on the peripheral edge of the steam hole 14.
6 and a knob 16 are formed and are detachably engaged with the main body 8. At the bottom of the hopper 12 is a coffee bean inlet 1.
7 is formed, and this coffee bean inlet 17 opens in the axial direction of the rotating shaft 1o, that is, in the horizontal direction, and communicates the grinding chamber 18 and the hopper 12. Further, the bottom surface of the hopper 12 is inclined from the inner surface toward the coffee bean inlet 17, and the bean inlet 17 is located at the lowest part of the hopper 12. A rotating shaft 10 rotatably extends into the grinding chamber 18, and a blade-shaped grinding body 11 is attached to the rotating shaft 10. Further, at the lower part of the crushing chamber 18, an air outlet 19 having a plurality of small holes is provided. The tip of the rotating shaft 10 extends into the coffee bean inlet 17, and the distance between the upper end of the coffee bean inlet 17 and the rotating shaft 1o is large enough to prevent coffee beans from passing through. The grinding body 11 facing the gap 20 formed between the lower end of the bean input port 17 and the rotating shaft 10 has its outer peripheral edge sized to effectively receive the coffee beans introduced from the gap 20. ing.

Below the grinding chamber 18, a basket 21 for storing the coffee powder produced in the grinding chamber 18 is removably attached to the main body 8. A basket lid 22 is attached to the upper opening of the basket 21, and the basket lid 22 has a protrusion 23 and ribs 24 integrally formed of synthetic resin to prevent scattering of coffee powder. Further, a filter 25 is installed inside the basket 21. Further, a volume ratio port 2θ is formed in the lower part of the basket 21, and a container 27 for storing the coffee liquid extracted by the basket 21 is disposed below the extraction port 26 to be detachably attached to the main body 8. A water tank 28 for storing water is provided on the side of the hopper 12 and basket 21 provided in the main body 8, and a hot water supply device 29 is provided below the water tank 28. The waterway switching valve 30 of the water heater 29 is linked to the motor 9 and a timer 31. The waterway switching valve 3o connects the water supply port 291a to a heating device (not shown).
A waterway that circulates again to the water tank 28 via the water supply port 2
This is to switch a water channel for supplying hot water from 9IL through a heating device to a discharge port 32 that opens at the top of the hopper 12. Reference numeral 33 denotes a vibration isolating rubber that prevents the image from being transmitted to the main body 8 as the motor 9 rotates.

The operation of the above configuration will now be described.

First, the hopper lid 13 is removed and a required amount of coffee beans is stored in the hopper 12. Some of the coffee beans in the hopper 12 are stored in the grinding chamber 18 through the gap 20 of the coffee bean input port 17. At this time, the coffee beans
0 opens below the rotating shaft 10 of the motor 9, so that it is stored only below the rotating shaft 10 in the crushing chamber 18.

Next, the required amount of water is supplied to the water tank 28. Next, when the timer 31 is operated and the motor 9 is energized, the grinding body 11 is rotationally driven by the motor 9, and the coffee beans in the grinding chamber 18 are ground. The ground coffee powder is stored in the basket 21 from the outlet 19.

As the grinding of the coffee beans in the grinding chamber 18 progresses,
Coffee beans are sequentially supplied from the hopper 12 to the grinding chamber 18. Since the coffee beans near the coffee bean inlet are swung by the tip of the rotating shaft 10, the coffee bean inlet 17 is not clogged with coffee beans.

When all the coffee beans are crushed by the crushing body 11, the timer 31 is activated, the rotation of the motor 9 is stopped, the heating device is energized, and the water in the water tank 28 is heated to reach the desired water temperature. At this point, the waterway switching valve 3
o is operated to supply hot water into the hopper 12 from the discharge port 32.

As the waterway switching valve 3o operates, the motor 9 is driven again, and the crushing body 11 is rotationally driven.

The hot water supplied to the hopper 12 is
The coffee powder flows into the grinding chamber 18, is stirred by the grinding body 11 together with the coffee powder remaining in the grinding chamber 18, and then
The coffee liquid is supplied from the outlet 19 to the basket 21, and the coffee liquid is extracted in the basket 21.

Therefore, according to this embodiment, a part of the required amount of coffee beans stored in the hopper 12 is stored in the grinding chamber 18, and the coffee beans stored in the grinding chamber 18 are ground by the grinding body 11. Since the coffee beans are supplied from the hopper 12 to the grinding chamber 18 as the grinding progresses, the amount of coffee beans to be ground at one time is limited to a small amount.
As a result, the load applied to the motor 9 that rotationally drives the crushing body 11 becomes smaller, so that the crushing body 11 can be made smaller. Additionally, since small amounts of coffee beans are ground one after another, the noise generated when grinding coffee beans is also reduced. In addition, hot water is supplied from the top of the hopper 12, and the grinding chamber 1
By sprinkling hot water supplied into the grinding chamber 8 with the grinding body 11, coffee powder remaining in the grinding chamber 18 can be removed, and as a result, cleaning after use of the device becomes unnecessary.

Effects of the Invention As is clear from the description of the embodiments described above, according to the present invention, a part of the required amount of coffee beans stored in the hopper is disposed below the rotating shaft of the motor extending into the grinding chamber of the grinding chamber. Since the coffee beans in the grinding chamber are crushed by the grinding body, the starting torque of the motor that rotates the grinding body can be small, and its capacity can also be reduced, and this motor is also compact. can be converted into

Furthermore, since the crushing body can also be made smaller, the crushing chamber that surrounds the crushing body, as well as the apparatus itself to which this crushing chamber and the motor are attached, can also be made smaller. Furthermore, since the amount of coffee beans that are ground at one time is small, the noise generated when grinding the coffee beans can also be reduced.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway longitudinal sectional view of an electric coffee maker according to an embodiment of the present invention, FIG. 2 is a perspective view of the same electric coffee maker, and FIG. FIG. 4 is a longitudinal sectional view of a conventional electric coffee maker. 9... Motor, 1o... Rotating shaft, 11
...Crushing body, 12...Hopper, 17
...Coffee bean inlet, 18... Grinding chamber, 19... Air outlet, 21... Basket. Name of agent: Patent attorney Toshio Nakao and one other name Figure 3 Figure 4

Claims (1)

[Claims] A motor with a rotating shaft arranged in a substantially horizontal direction, a hopper for storing coffee beans, a grinding chamber equipped with a blade-like grinding body rotatably driven by the motor, and coffee powder made in this grinding chamber. a basket for storing coffee beans, a coffee bean inlet opening in the direction of the rotation axis is formed at the bottom of the hopper, and the bottom surface of the hopper is sloped downward from the inner surface toward the coffee bean inlet, and The electric coffee boiler is configured such that an outlet having a plurality of small holes is provided in the lower part of the grinding chamber, and the grinding chamber stores and grinds coffee beans only below a rotating shaft extending into the grinding chamber.