JPH019459Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a coffee maker that grinds coffee beans, automatically transfers the ground coffee powder to a filtration chamber, and injects hot water into the filtration chamber to extract coffee liquid. Regarding improvements.

Conventionally, this type of coffee maker has integrated a grinding chamber and a filtration chamber, grinds coffee beans by rotating a cutter device in the grinding chamber, and transfers the coffee powder to an air flow generated by the rotation of the cutter device. The coffee powder is automatically transferred from the grinding chamber to the filtration chamber via a communication path, and the coffee powder and clean air are separated by the air flow in the filtration chamber, that is, the so-called cyclone effect, and only the coffee powder is filtered. There is a known method in which coffee powder is deposited in a room, hot water is poured into the deposited coffee powder, coffee components are extracted through a filter, and the coffee liquid is stored in a coffee liquid container located below the filtration chamber. ing.

By the way, the coffee powder can be more effectively transferred from the grinding chamber to the filtration chamber, and the coffee powder and the intake air can be more effectively separated in the filtration chamber, thereby achieving efficient coffee supply. There has been a widespread demand among consumers for a coffee maker that enables this.

The present invention has been developed by focusing on the conventional situation, and has a configuration in which an eaves portion is provided on the inner circumferential wall of the filtration chamber constituent member, and it is possible to transfer coffee powder from the grinding chamber to the filtration chamber, and to transfer coffee in the filtration chamber. It is an object of the present invention to provide a coffee maker that can more effectively separate coffee grounds from intake air and also more effectively deposit coffee grounds in a filtration chamber.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the figure, 1 is a main body case of the coffee maker, which houses a motor 2 that drives a cutter device as a member for crushing coffee beans, a heating device 3 that heats water injected into a filtration chamber, and the like.

4 is a cutter device, and the motors 2 and 6,
It is connected to a position directly above the motor 2 via a coupling ring 6', and is housed in a mill case 5 as a grinding chamber R, which is detachably mounted on the main body case 1, and grinds coffee beans and is also used as will be described later. This creates a swirling air flow. Reference numeral 7 denotes a hot water discharge port through which water supplied from a water container, which will be described later, is heated by the heating device 3, turned into hot water, and then discharged.

Reference numeral 9 denotes a basket forming a filtration chamber K at a position below the hot water outlet 7, and 26 steps are provided on the side wall portion facing the lower end of the filter medium presser 17, which will be described later.
The filter medium 8 is stored in the basket 9 such that the upper end of the filter medium 8 is located between the stepped portion 26 and the lower end of the filter presser 17. Reference numeral 10 denotes a basket lid that is placed over the basket 9, and the lid 10 and the mill case 5 are pressed and fixed from above by a main body lid 24. The inner diameter of the mill case 5, that is, the grinding chamber R, is smaller than the inner diameter of the upper part of the filtration chamber K, as shown in FIG.

Reference numeral 11 denotes a communication passage connecting the grinding chamber R and the filtration chamber K, which opens on the side wall of the mill case 5 toward the upper space of the filtration chamber K.
An on-off valve 12 for controlling opening and closing of the communication passage 11 is interposed in the side opening. Also, this communication path 1
1 is connected to each of the crushing chamber R and the filtration chamber K in a substantially tangential direction, as shown in FIG.

14 is a filter provided on the top wall of the mill case lid 13 which is placed and fixed on the upper part of the mill case 5; 15 is a partition wall detachably attached to the mill case lid 13; A wind guide cylinder is vertically installed with its opening facing the cutter device 4 to a position directly above the cutter device 4,
The interior space of the mill case 5 is divided into upper and lower halves. 17
18 is a filter presser provided on the back surface of the basket lid 10 to press down the filter medium 8 from above, and 18 is a filter presser holder provided at a position below the center of the basket lid 10 to hold a number of cylindrical air flow guiding walls inside the cylinder, which will be described later. book 2
This is a hot water receiving plate that is connected and supported by one pillar.

Reference numeral 19 denotes a cylindrical air flow guide wall that is vertically installed on the lower surface of the basket lid 10 and functions as a canopy of the filtration chamber K, and one side of the peripheral wall extends to a position facing the outlet of the communication passage 11. The airflow guide wall 19 is vertically installed, and is arranged around the outer periphery of the hot water receiving plate 18 and the inner periphery of the filter medium presser 17 so that the lower end surface of the air flow guide wall 19 is located lower than the lower surface of the hot water receiving plate 18. It is installed vertically.

20 is a filtration chamber K flush with the bottom wall of the communication passage 11;
It is a canopy part extending inward, and is located above the upper edge of the filter medium 8 and formed in an annular shape along the circumferential direction of the filter chamber K.

In addition, 22 is a glass bottle 25 that is placed on the heating device 3 and stores coffee liquid to be extracted and dripped through a hole 23 opened at the bottom bottom surface of the lower part of the basket 9.
is a water container disposed at the rear of the main body case 1.

Next, the action will be explained.

Remove the main body lid 24 and open the mill case 5 (grinding chamber R)
In addition to putting the required amount of coffee beans inside,
A filter medium 8 such as a commercially available coffee paper filter is placed in the basket 9, and after the basket lid 10 is put on, the main body lid 24 is attached and fixed.

Next, the cutter device 4 is rotated in the direction of arrow P shown in FIG. 4 by energizing the motor 2,
Grind the coffee beans. After a predetermined period of time has elapsed, when the on-off valve 12 is opened to open the communication passage 11, the swirling air flow containing coffee powder generated by the impellers B and B' provided in the cutter device 4 is The direction of arrow _F1 shown by the dashed line in Figure 4,
That is, this swirling air flow becomes an air flow in the direction of flowing from the crushing chamber R to the filtration chamber K via the communication passage 11 together with the intake air sucked in through the filter 14 and the air guide tube 16, and the pulverization follows the air flow. The coffee powder in the chamber R is transferred to the filtration chamber K side.

Due to the so-called cyclone effect in aerodynamics, the airflow containing the coffee powder transferred to the filtration chamber K side passes through a cylindrical filter provided on the back side of the basket lid 10, as indicated by the arrow _F2 indicated by a dashed line in FIG. While rotating the air flow path formed between the air flow guide wall 19 and the filter medium holder 17 in one direction, the air flow gradually flows downward, and as soon as it reaches the lower part of the filtration chamber K, the direction changes upward, and the air The coffee powder rises inside the cylinder of the airflow guide wall 19 and is discharged outside the main body, and the coffee powder is deposited in the filtration chamber K.

Note that coffee powder and air can be separated without installing a special filter on the exhaust side of the air flow. That is,
Only clean air flows through the air flow guide wall 19 and hot water receiving plate 18
It is discharged to the outside from between.

As described above, when the coffee powder has been transferred from the mill case 5 (grinding chamber R) to the filtration chamber K, when the power is turned off to the motor 2 and the heating device 3 is turned on, water is supplied from the water container 25. is heating device 3
The hot water is heated and guided to the hot water outlet 7, and dripped from the hot water outlet 7 onto the hot water receiving plate 18.
It is dripped into the filtration chamber K from the outer peripheral end of the filter 8. When this hot water passes through the coffee powder in the filtration chamber K, it extracts coffee components, drops through the filter medium 8 through the holes 23 into the glass bottle 22 as coffee liquid, and is stored therein.

At this time, since the eaves portion 20 is extended so as to cover the upper edge of the filter medium 8 so as to be flush with the floor surface of the communication path 11, the coffee powder transferred through the communication path 11 is sufficiently absorbed into the filtration chamber. It is possible to suppress the scattering of coffee powder caused by turbulence near the filtration chamber K side opening of the communication path 11, and also to prevent the coffee powder from entering between the filter medium 8 and the basket 9. , the accumulation of coffee powder in the filtration chamber K is made more reliable.

Furthermore, in this embodiment, since the lower end of the filter medium presser 17 is formed to be located directly above the basket 9, the lower end can press the filter medium 8 from above, preventing the upper end of the filter medium 8 from turning over. This can prevent the transferred coffee powder from entering between the filter medium 8 and the basket 9.

Further, according to this embodiment, the cylindrical air flow guide wall 19 forms an annular air flow path in the upper space in the filtration chamber K together with the filter medium presser 17 provided around the outer periphery, so that the arrow F in the figure The swirling air flow shown in ₂ is more effectively generated, the cyclone effect is enhanced, and the coffee powder transfer from the grinding chamber R to the filtration chamber K and the separation of the coffee powder and air in the filtration chamber K are made more effective. It can be implemented.

In addition, since the communication passage 11 is connected to each of the crushing chamber R and the filtration chamber K in a substantially tangential direction, the swirling airflow generated by the rotation of the cutter device 4 can be more effectively directed to the filtration chamber K. can be,
Combined with the above-mentioned effective air transfer, the effect can be further enhanced.

Furthermore, in this embodiment, since the inner diameter of the upper part of the filtration chamber K is formed larger than the inner diameter of the crushing chamber R, the communication passage 1
The movement of the coffee powder after being discharged into the filtration chamber K from 1 becomes slower than the movement in the grinding chamber R, and the cyclone effect can more effectively deposit the coffee powder in the filtration chamber K. can.

In addition, since the configuration is such that the clean outside air sucked in through the filter 14 provided on the mill case lid 13 is discharged toward the rotation center of the cutter device 4 through the wind guide tube 16, the impeller B, The centrifugal fan effect by B' is enhanced, and the coffee powder can be transferred from the mill case 5 to the filtration chamber K more effectively.

As explained above, according to the present invention, the eaves are annularly provided on the inner circumferential wall of the filtration chamber component, so that the coffee powder can be transferred from the grinding chamber to the filtration chamber, and the coffee powder and air can be exchanged in the filtration chamber. The coffee powder can be separated from the filtration chamber more efficiently, and the movement of the filter medium can be suppressed, so that the coffee powder can be deposited more effectively in the filtration chamber.

[Brief explanation of the drawing]

The drawings show an embodiment of the coffee maker according to the present invention, in which Fig. 1 is a vertical sectional view of the main part, Fig. 2 is a plan view of the same, and Fig. 3 is an exploded view of the basket and basket lid shown in Fig. 1. , FIG. 4 is a diagram of the principle structure for explaining the process from grinding to transportation of coffee beans. 1... Coffee maker body case, 4... Cutter device, 5... Mill case, 8... Filter medium, 9
...Basket, 10...Basket lid, 11...
...Communication path, 20...Eave part, K...Filtration chamber, R
...Crushing room.

Claims (1)

[Scope of utility model registration request] A grinding chamber in which coffee beans are ground by a rotating cutter device, and a filtration chamber in which the ground coffee powder is introduced from the grinding chamber through a communication path by an air flow generated by the rotation of the cutter device. In the coffee maker, in which hot water injected into the filtration chamber is filtered through a filter medium and extracted as coffee liquid, the communicating passage is provided with a bottom wall extending flush with the bottom wall of the communication passage into the filtration chamber, and an upper end of the filter medium. A coffee maker characterized in that an annular eave portion located above the edge and extending along the circumferential direction of the filtration chamber is provided on the inner circumferential wall of the filtration chamber constituent member.