JPH0148010B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention involves grinding coffee beans with a cutter, allowing the ground coffee powder to fall and accumulate in a filter below, and then supplying hot water. Concerning a coffee brewer for obtaining coffee liquid.

(b) Prior Art A conventional coffee boiler of this type, as disclosed in Japanese Utility Model Application Publication No. 59-108521, collects ground coffee powder in a filter and supplies hot water to it from above. However, the degree of accumulation is not uniform across the filter, resulting in uneven filtration density, which is a drawback.Moreover, before it is completely filtered, a thin coffee liquid flows through the mesh on the peripheral side of the filter. The problem was that it leaked.

(c) Problems to be Solved by the Invention Therefore, an object of the present invention is to provide a coffee boiler in which coffee is sufficiently filtered within the filter.

(d) Means for Solving the Problems The present invention is characterized in that the filter is formed into a bottomed cylindrical shape by stretching a resin mesh between a plurality of crosspieces, and that is formed with a wide band-shaped partition.

(e) Function By doing so, the hot water that has not completely filtered the coffee powder will not escape through the mesh on the peripheral side of the filter, and the coffee powder will be sufficiently filtered.

(F) Embodiment 1 is a coffee brewing device main body, and the top surface has a water tank 2 for storing water, a mounting base 4 in which a mill motor 3 is installed, and a mounting part 6 on which a decanter 5 is mounted. We are prepared. The mounting portion 6 forms an opening 50 to expose the heater 7.
The decanter 5 is placed directly on the plate.
The decanter 5 has a handle 8 attached to its outer surface and a removably attached lid 9 having a notch 55 at its upper opening. The mill motor 3 has a lower joint 10 slightly protruding from the upper surface of the mounting base 4. Reference numeral 11 denotes a lower case made of synthetic resin that is removably disposed on the upper surface of the mounting base 4 by bayonet engagement, and has an open upper surface and a cylindrical protrusion 12 rising approximately in the center of the bottom surface, and has a cylindrical protrusion 12 formed on one side of the bottom surface. A knob 13 is formed in the portion. Said knob 1
3 is hollow, forming a discharge hole 18 facing the upper opening of the decanter 5, and communicating with the inside of the lower case 11. Said knob 13
There is an opening/closing valve 52 inside which is constantly pressed by a spring 51 and closes the discharge hole 18 in a liquid-tight manner.
is provided, and this on-off valve 52 is connected to a shaft 53.
When the decanter 5 is placed on the placing part 6 as shown in FIG. Moreover, this discharge hole 18 is arranged to face the notch 55 of the lid body 9. Then, the inner bottom surface of the lower case 11 located around the lower part of the protruding portion 12 is slightly protruded upward to form a protruding step portion 56, and the inner bottom surface of the lower case 11 is formed to be sloped low toward the discharge hole 18. are doing. That is, when the lower case 11 is placed on the upper surface of the table T as shown in FIG. 3, the discharge hole 18 is located at the lowest position.

Reference numeral 14 denotes a filter that can be attached to and removed from the lower case 11, and its bottom surface is placed on the protruding step portion 56.The filter 14 has a cylindrical shape as a whole and has a cylindrical shape approximately in the center of the bottom surface that covers the protruding portion 12 from the periphery. The cylindrical portion 15 is formed to stand up, and the upper end surface of the cylindrical portion 15 is formed lower than the protruding portion 12, and the cylindrical portion 15 is a blind portion as shown. The bottom and side surfaces of the filter 14 are made of synthetic resin mesh, and reinforcing bars 16 are provided here and there radially and vertically. A wide band-shaped partition 58 is integrally formed with the crosspiece 16 at the lower part of the circumferential side of the filter 14 to prevent coffee liquid from escaping from the mesh on the circumferential side of the filter 14.

Reference numeral 17 denotes a cylindrical upper case made of synthetic resin that is attached to and detached from the upper surface of the lower case 11, and inside thereof is a bottomed cylindrical metal (for example, stainless steel) case.
A sieve plate 20 is inserted and fitted. This sieve plate 20 is formed by drawing, and has a large number of through holes 19 bored in its bottom surface 20a, and engaging protrusions 20ac formed at appropriate positions on the outer wall of the circumferential side surface 20b to form the upper case 17. It is fitted and fixed into an engagement hole (not shown) formed in a proper position on the inner wall of the holder. Then, around the bottom part 20a of the sieve plate 20 (at the boundary between the bottom part 20a and the circumferential side part 20b), an inclined part 20d which is inclined toward the through hole 19 is formed, and the center is slightly bulged upward. It is tightened to form a bulge 23, and an insertion hole 24 is formed in the center of the bulge 23, and a plurality of locking holes 25 are formed around the insertion hole 24. Reference numeral 22 denotes a cover plate that covers the upper opening of the upper case 17, and forms the suction hole 21.

Reference numeral 26 denotes a diffusion gutter which is attached to and detached from the lower surface of the upper case 17, and includes a circular water collecting part 27, four water sprinkling parts 28 extending radially from the water collecting part 27, and an approximately L-shaped hollow part. and a mounting portion 29. A cylindrical mounting portion 30 is formed in the water collecting portion 27, and four locking claws 31 are formed at the upper end of the mounting cylinder portion 30 to engage with the locking hole 25. A water sprinkling hole 32 is bored in the water sprinkling section 28 . The mounting cylindrical portion 30 forms a through hole 33 . Reference numeral 34 denotes a cutter that is rotatably disposed within the upper case 17, and a mounting base 35 into which the cutter 34 is inserted is formed larger than the position where the locking hole 25 is disposed, and the mounting base 3
An elongated upper joint 36 integrally connected to the bulge 5 in the vertical direction is rotatably attached to the bulge 23 via a washer or the like. Said lower joint 1
0 and the upper joint 36 can be freely engaged and detached. A notch 37 is formed at the upper edge of the lower case 11 to allow the attachment portion 29 of the diffusion gutter 26 to escape. With the diffusion gutter 26 attached to the lower surface of the upper case 17, the opposing sieve plates 20 of the diffusion gutter 26 serve as blind portions. 39 has one end attached to the tank 2 via a check valve 40, the middle part wrapped around the heater 7, and the other end erected along the tank 2 to face the outside. The other end of the hot water supply pipe is configured to face the hollow mounting portion 29 of the diffusion gutter 26 .

60 is a hinge part 61 provided at the upper part of the main body 1
This is an outer lid that can be opened and closed at different times to cover the upper opening of the water tank 2 and the upper surface of the upper case 17. In addition, the sieve plate 20 has a flange formed at its upper opening edge, and an annular step portion formed at the upper part of the inner wall of the upper case 17, and the flange is engaged with the step portion to move the sieve plate 20 to the upper case 17. It may be inserted and fitted into 17.

Reference numeral 63 denotes a power cord, which is led out from the tank mounting portion 64 of the water tank 2 via a cord bushing 65, and a drain portion 66 for preventing water intrusion is formed around the cord bushing 65. This drain section 66 has a dome shape and separates the water flowing down into the left and right sides. Reference numeral 90 denotes a lead wire connection terminal plate, which is disposed near the water tank 2 together with electrical parts such as a power contact 75 (described later) to prevent the influence of heat from the heater 7.

Next, 70 is a knob for setting the operation of the timer motor 71, 72 is a mill indicator lamp that indicates when the mill is in operation, 73 is a drip indicator lamp that indicates that drip operation is in progress, and 74 is a power switch, which has a power contact 75. are doing. To explain the electric circuit, the power supply contact 75, the timer motor 71, and a first contact 77 interlocked with the timer motor 71 are connected in series to a commercial AC power supply 76. 78 is a second contact linked to the operation of the timer motor 71, the mill motor 3 and the mill indicator lamp 72 are connected to the contact a side, and the heater 7 and the drip indicator lamp 73 are connected to the contact b side. A bimetal thermometer 80 is connected. Then, when 20 seconds have passed since the timer motor 71 was energized (this time corresponds to the time required to grind coffee beans for about 10 people), the first contact 77 is opened and the second contact is opened.
The contact 78 is set to switch from contact a to contact b. When the knob 70 is rotated to the "mil" position, the first contact 77 is closed, the second contact 78 is connected to the contact e side, and the 20
After seconds have elapsed, it rotates to the "drip" position and maintains that position even when keeping warm after dripping.

To explain the operation of such a configuration, for example, when you get coffee liquid for 5 people, there are 5 cups in the water tank 2.
Water for one person and coffee beans for five people are stored in the upper case 17, and then the knob 70 is turned to "mill".
This can be achieved by rotating the power switch 74 to the desired position and turning on the power switch 74. Then, the coffee beans are crushed into coffee powder, which is then transferred to the sieve plate 1 by centrifugal force.
7, but the sieve plate 17
The coffee powder is smoothly guided into the through holes 19 along the inclined surface of the inclined surface portion 20d, and falls and accumulates on the filter 14. Then, by the time the cutter 34 rotation time for five people has passed (approximately 10 seconds), all of the ground coffee powder has been accumulated on the filter 14, but the cutter 34 remains idle until 20 seconds have passed. Incidentally, at this time, the mil display lamp 72 is lit.

After 20 seconds have elapsed, the first contact 77 is opened, the second contact 78 is switched to the contact b side, the heater 7 is energized, and the drip indicator lamp 73 is turned on.

The water in the water tank 2 undergoes heat exchange with the heater 7 to become hot water, which is dripped onto the accumulated coffee powder from the diffusion gutter 26, filtered by the filter 14, and becomes coffee liquid, which is sent to the on-off valve 52. The water is stored in the decanter 5 through the discharge hole 18 which is opened. During the extraction of this coffee liquid, the hot water dripping onto the coffee grounds tries to escape through the mesh on the peripheral side of the filter 14 without being filtered, but is blocked by the band-shaped partition 58, and the coffee grounds are blocked. It is forcibly filtered and reliably guided to the discharge hole 18 through the mesh on the bottom surface of the filter 14.

When the water in the water tank 2 runs out, the thermostat 80 attached to the bottom of the heater 7 operates to stop the power supply to the heater 7, and after that, the thermostat 80 is opened and closed to maintain heat. This will be transferred.

The present invention is characterized in that a wide band-shaped partition 58 is formed at the lower part of the circumference of the filter 14, but this is especially true for "Murashi" which has been adopted in this type of coffee brewer in recent years. It is capable of fully demonstrating its functions. That is, when a predetermined amount of hot water suitable for "uniformity" is supplied into the filter 14 of the present invention, and then the hot water supply is cut off to obtain swelling of the coffee powder, the hot water is supplied to the partition part 58 on the peripheral side of the filter. Since there is no leakage, it is possible to obtain coffee powder filtration that is sufficiently suitable for swelling.

(g) Effects of the invention Since the present invention is constructed as described above,
The partition prevents hot water from leaking from the peripheral side of the filter, and the dripping hot water sufficiently filters coffee powder, resulting in a coffee liquid with even consistency.

[Brief explanation of drawings]

FIG. 1 is a front view of the coffee brewer of the present invention, FIG. 2 is a schematic sectional view thereof, FIG. 3 is a sectional view when the upper case is engaged with the lower case and placed on a table, and FIG. Figure 4 is a top perspective view of the lower case, Figure 5 is a partially cutaway perspective view of Figure 3, Figure 6 is a partially cutaway perspective view of the upper case, and Figure 7 is a perspective view of the diffusion gutter. , FIG. 8 is a partially cutaway schematic perspective view of FIG. 1, and FIG. 9 is an electric circuit diagram. 11...lower case, 14...filter, 16...
Crosspiece, 17... Upper case, 58... Partition section.

Claims (1)

[Claims] 1 A machine body equipped with a motor, a lower case that is attached to and detached from the machine body and has a filter inside, a cutter that is rotationally driven by the motor to grind coffee beans, and a sieve plate that sieves the ground coffee powder into the filter. and a heating device that heats water from a water tank provided in the aircraft body and supplies hot water to the lower case, and the filter is constructed by stretching a resin mesh between a plurality of crosspieces. A coffee boiler characterized by having a cylindrical shape with a bottom and having a wide band-like partition formed at the lower part of the circumferential side.