JPS6340532B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a so-called fully automatic coffee boiler that grinds coffee beans with a cutter and supplies hot water to the ground coffee powder.

(b) Prior Art Conventional fully automatic coffee brewers of this type are disclosed in, for example, Japanese Patent Application Laid-Open No. 54-70170 and Japanese Patent Application Laid-Open No. 55-1989.
As seen in Publication No. 108333, hot water is supplied from above the cutter, so the cutter gets in the way and the hot water is not dripped evenly onto the ground coffee powder, resulting in uneven extraction. Hot water supplied from the mounting base of the cutter may enter and have a negative effect on electrical components such as the motor, hot water may boil on the cutter and reduce the taste of the coffee liquid, or hot water may adhere to the surface of the cutter with coffee powder. It was also unhygienic.

Moreover, since the cutter mentioned above is not modified in any way, the coffee beans being ground are blown around inside the grinding chamber by the wind generated by the rotation of the cutter, and are crushed by the cutter many times, resulting in no waste. There was a drawback that the coffee powder was ground finer than necessary, resulting in non-uniform grinding particle size.

(c) Purpose of the Invention The object of the present invention is to extract flavorful coffee liquid by pulverizing coffee beans uniformly without having to retain them in the upper case and pulverizing them many times.

(d) Structure of the Invention The structure of the present invention includes an upper case having a cutter for grinding coffee beans and a sieve plate for sieving the ground powder downward, and a case that is engaged with the lower part of the upper case and has an open top surface. a lower case in which a filter is disposed; a diffusion gutter abuttingly engaged with the lower surface of the sieve plate;
A heat-retaining lid that closes the upper opening of the upper case includes a motor that rotationally drives the cutter, a tank that stores water, and a heating device that heats water from the tank and supplies hot water to the diffusion gutter. A suction port is formed in the cutter, and a blade is formed in the cutter to forcibly suck air from the suction port, and a drainage hole is formed in the bottom of the lower case to discharge the sucked air and coffee liquid. The wind generated by the blades due to the rotary drive of the cutter flows from the suction port of the insulation lid, passes through the upper case and lower case, and flows to the drain hole, and the coffee powder that becomes powder quickly passes through the sieve plate and accumulates in the filter. .

(E) Embodiment 1 is a coffee boiler main body, which includes a base 3 in which a heater 2 is installed, a tank 4 provided on the top surface of the base 3 for storing water, and a tank 4 installed in parallel with the tank 4. It consists of a mounting table 6, etc., which is equipped with a motor 5 inside. The surface of the base 3 located above the heater 2 has an opening 7 so that a decanter 8 for receiving coffee liquid can be directly placed on the upper surface of the heater 2. The upper opening of the decanter 8 is opened and closed by a lid 9, and a cutout 10 is formed in a portion of the lid 9 so that a portion of the decanter 8 is always open. The upper opening of the tank 4 is opened and closed by a water lid 11. A hot water supply pipe 13 is connected to the lower part of the tank 4 via a check valve 12. The hot water supply pipe 13 is wound around the heater 2 in the middle, stands upright along the tank 4, and is bent downward with an end opening 14 facing the outside. The drive shaft 15 of the motor 5 is exposed to the outside from the top surface of the mounting table 6, and has a first joint 16 at its tip. A lower case 17 is detachably provided on the upper surface of the mounting table 6. The lower case 17 has a substantially cylindrical shape, and has an open top surface and a cylindrical insertion tube 1 with a small diameter in the center of the bottom surface.
8 has been launched and formed. A knob 19 is integrally formed on the outer side of the lower case 17, and a discharge hole 20 facing the notch 10 is formed in the knob 19. Said lower case 1
Inside the filter 7, a cylindrical filter 21 with an open top is removably disposed. A through-tube 22 is integrally formed in the center of the filter 21 so as to cover the through-tube 18, and a lever 23 is provided at a suitable location.
is formed. A cylindrical upper case 24 with an open upper surface is tightly disposed on the upper surface of the lower case 17 so as to be removable. Said upper case 2
A sieve plate 2 with a plurality of through holes 25 bored in the bottom of the plate 4.
6 is installed. The sieve plate 26 has a rotating shaft 2.
7 is rotatably attached, and a second joint 2 that engages with the first joint 16 is attached to the lower end of the rotating shaft 27.
8, and a cutter 29 is provided at the upper end. The cutter 29 has a blade 30 bent slightly downward.
is formed. In addition, engagement recesses 31, 31, . A radial-shaped diffusion gutter 33 is engaged with the lower surface of the sieve plate 26. The diffusion gutter 33 has a sieve plate 26 and an engaging claw 34.
At the same time, watering holes 35 are formed at appropriate locations,
In addition, the inflow opening 36 is arranged to face the end opening 14 of the hot water supply pipe 13. The sieve plate 26 facing the diffusion gutter 33 is a blind portion 26a. The through hole 25 formed in the sieve plate 26 is positioned outward from the opening of the insertion tube 18 of the lower case 17. Reference numeral 38 denotes a lid for opening and closing the upper surface opening of the upper case 24, which includes a convex portion 39 that engages with the engaging recess 31 and the sliding notch 32.
A cutout opening 40 is formed to match the cutout opening 40 . The lid 38 is provided with four suction ports 41. A closing plate 42 for opening and closing the suction port 41 is rotatably attached to the lid 38.
2 has four communicating holes 43 facing the suction port 41, and an operating lever 44 exposed to the outside from the notch opening 40 and the sliding notch 32.
is formed.

To explain the operation of this configuration, a desired amount of coffee beans is stored in the upper case 24 and a desired amount of water is stored in the tank 4, respectively, and then a power switch (not shown) is closed. Then, first, the motor 5 is energized and the cutter 29 is rotated to crush the coffee beans. When the time for completing this grinding has elapsed, the power to the motor 5 is automatically stopped, and the power to the heater 2 is turned on. By energizing the heater 2, hot water is supplied in a normal drip manner.
By driving the cutter 29 described above, coffee powder falls and accumulates in the filter 21 through the through holes 26a of the sieve plate 26. Hot water is supplied dropwise to the coffee powder from the hot water supply pipe 13 via the diffusion gutter 33. When the hot water is dripped onto the coffee powder, it is filtered and becomes coffee liquid, which is stored in the decanter 8 through the discharge hole 20.

At this time, since the blades 30 are formed on the cutter 29, if the communication hole 43 and the suction port 41 are aligned, air will be forcibly sucked in from the outside through these openings, and the cutter 29 will crush the particles. The subsequent coffee powder is forced into the through hole 2 by this suction wind.
5 into the filter 21, and is crushed by the cutter 29 many times to become coffee powder with a uniform particle size.
9, the grinding time is shortened.

Then, rotate the blocking plate 42 arbitrarily to close the suction port 4.
When the matching opening area between 1 and the communication hole 43 is varied,
The amount of air flowing in can be varied, and as a result, the particle size of the coffee beans can be adjusted, and the intensity of the coffee flavor can be selected.

Furthermore, when the hot water is supplied after being crushed by the cutter 29, if the suction port 41 is closed with the closing plate 42, delicious coffee liquid can be directly supplied and stored in the decanter 8 without the flavor of the filtered coffee leaking outside. It is.

(f) Effects of the invention Since the present invention is constructed as described above,
When grinding coffee beans, the blades force air to be sucked in through the suction port, passed through the upper case and lower case, and then discharged to the outside through the discharge hole.
The coffee beans to be ground no longer fly around inside the upper case and are ground repeatedly by the cutter, and the ground coffee powder is forced to fall into the filter through the holes in the sieve plate and is stored. This speeds up the grinding time and prevents the coffee beans from being ground more than necessary, making it possible to obtain uniformly ground coffee powder.

In addition, the hot water supplied from the diffusion gutter is not dripped onto the cutter but directly onto the coffee powder, so the temperature of the hot water does not drop or the flavor deteriorates, and the electric power from the cutter attachment point to the motor etc. It is also possible to prevent hot water from entering the parts.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of the coffee brewer of the present invention;
Figure 2 is an enlarged sectional view of the main part of Figure 1, Figure 3 is a partially cutaway external perspective view of Figure 1, Figure 4 is an external perspective view of the diffusion gutter, and Figure 5 is the external appearance of the heat insulation lid. The perspective view and FIGS. 6 and 7 are plan views showing different usage examples of the heat-retaining lid. 17... Lower case, 20... Discharge hole, 24...
Upper case, 29... cutter, 30... feather, 3
8...Lid, 41...Suction port.

Claims (1)

[Claims] 1. An upper case having a cutter for grinding coffee beans and a sieve plate for sieving the ground powder downward;
a lower case that is engaged with the lower part of the upper case and has an open top surface and a filter is disposed therein; a diffusion gutter that is abuttingly engaged with the lower surface of the sieve plate; and a motor that rotationally drives the cutter. A tank that stores water,
a heating device that heats water from the tank and supplies the hot water to the diffusion gutter; a suction port is provided in the lid that closes the upper opening of the upper case; 1. A coffee brewing device, characterized in that the bottom of the lower case is formed with vanes for sucking air, and the bottom of the lower case is formed with a discharge hole for discharging the sucked air and coffee liquid.