JPS5977817A - Coffee maker - Google Patents

Abstract

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

Description

Detailed Description of the Invention The present invention provides 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 a grinding chamber and a filtration chamber that are integrally configured, and coffee beans are ground by rotating a cutter device in the grinding chamber, and the coffee powder is transferred to an air flow generated by the rotation of the cutter device. At the same time, the powder is automatically transferred from the grinding chamber to the filtration chamber via a communication path, and by the flow of air in the filtration chamber, that is, the so-called cyclone effect,
Coffee powder and clean air are separated and only the coffee powder is deposited in a filtration chamber. Hot water is poured into the deposited coffee powder to extract the coffee components, and the coffee liquid is placed below the filtration chamber. A system in which the coffee liquid is stored in a container is known.

By the way, it is possible to more effectively transfer the coffee powder and the air taken in from the outside from the grinding chamber to the filtration chamber, and also to more effectively separate the coffee powder and the intake air in the filtration chamber. Therefore, there has been a wide demand among consumers for a coffee maker that can efficiently supply coffee.

The present invention has been made by paying attention to such conventional situation,
A configuration in which a cylindrical airflow guide wall is provided on the lower surface of the top wall of the filtration chamber allows the transfer of coffee grounds and intake air from the grinding chamber to the filtration chamber, and the separation of the coffee grounds and intake air within the filtration chamber.
The aim is to provide a coffee maker that can be used more effectively.

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 a 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, which is connected to the motor 2 directly above the motor 2 through a 6.6” coupling;
The coffee grinder is housed in a mill case 5 serving as a grinding chamber which is detachably placed on the main body case 1, and grinds coffee beans and generates a swirling airflow as described below. 7 is a hot water discharge port through which water supplied from a water container (to be described later) is heated by the heating device 3 and then discharged after being turned into hot water; 9 is a hot water discharge port which forms a filtration chamber K at a position below the hot water discharge lower;
A basket 1o for storing filter media is a basket lid that is placed over the basket 9 and functions as a ceiling wall of the filtration chamber.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 is smaller than the inner diameter of the upper part of the filtration chamber, as shown in FIG.

11 is a communication path connecting the mill case 5 and the filtration chamber;
The side wall of the mill case 5 opens toward the upper space of the filtration chamber, and an opening/closing valve 12 for controlling opening/closing of the communication passage 11 is interposed in the opening of the communication passage 11 on the mill case 5 side. Further, as shown in FIG. 4, this communication passage 11 is connected to the mill case 5 and the filtration chamber in a substantially tangential direction. Further, this communication passage 11 is provided with 20 powder transfer walls extending from the bottom wall of the communication passage 11 toward the filtration chamber.

The width of the powder transfer wall 20 is larger than the width of the communication path 11.

14 is placed and fixed on the upper part of the mill case 5.
Filter installed on the top wall of the mill case lid in No. 3, 15
is a partition wall detachably attached to the mill case lid 13, in the center of which 16 air guide cylinders are vertically installed with their openings facing the cutter device 4 to a position directly above the cutter device 4; The space inside the mill case 5 is divided into upper and lower halves. 17 is a filter medium presser provided on the back surface of the basket lid 0 to press down the filter medium 8 from above, and 18 is a filter presser provided at a position below the center of the basket lid 10 to press the inside of a cylindrical air flow guiding wall, which will be described later. This is a hot water receiving plate that is connected and supported by several 21 pillars.

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

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

Next, the effect will be explained.

The main body lid 24 is removed and a predetermined amount of coffee beans are placed in the mill case 5, and a filter medium 8 such as a commercially available coffee paper filter is placed in the basket 9.
After putting on the basket lid 10, the main body lid 24 is attached and fixed.

Next, by energizing the motor 2, the cutter device 4
is rotated in the direction of arrow P shown in FIG. 4 to crush the coffee beans. After a predetermined period of time has elapsed, when the on-off valve 12 is opened to open the communication path 11, the swirling air flow containing coffee powder generated by the blade wheels B and B'' provided in the cutter device 4 is generated as shown in FIG. In other words, this swirling air flow flows in the direction of arrow F+ shown by a dashed line in the figure, that is, this swirling air flow flows through the mill case 5 together with the intake air taken in through the filter 14 and the wind guide tube 16.
The airflow flows from the filtration chamber to the filtration chamber through the communication path 11, and the coffee powder in the mill case 5 is transferred to the filtration chamber along with the airflow.

Due to the so-called cyclone effect in aerodynamics, the airflow containing the coffee powder transferred to the side of the filtration chamber flows through the cylinders provided on the back surfaces of the Basquera 1 to the lid 10, as indicated by the arrow F2 indicated by the dashed line in FIG. While rotating the air flow path formed between the shaped air flow guide wall I9 and the filter medium holder 17 in one direction, the air gradually flows downward, and as soon as it reaches the lower part of the filtration chamber, the direction changes upward, Air rises within the cylinder of the airflow guide wall 19 and is discharged outside the main body case l, and coffee powder is deposited inside the filtration chamber.

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

As described above, when the coffee powder has been transferred from the mill case 5 to the filtration chamber K, when the power to the motor 2 is stopped and the power is applied to the heating device 3, the water supplied from the water container 25 is heated by the heating device 3. The hot water is heated and guided to the hot water discharge lower, from which the hot water is dripped onto the hot water receiving plate 18. When this hot water passes through the coffee powder in the filter chamber, it extracts coffee components, and drips through the filter medium 8 through the holes 23 into the glass bottle 22 as coffee liquid, where it is stored.

At this time, the cylindrical air flow guide wall 19 forms an annular ventilation flow path in the upper space of the filtration chamber together with the filter medium presser 17 provided around the outer periphery, so that the swirling air flow shown by arrow F2 in the figure is produced more effectively, the cyclone effect is enhanced, and the coffee powder can be transferred from the mill case 5 to the filtration chamber and the coffee powder and air can be separated from each other more effectively in the filtration chamber.

Furthermore, according to the present embodiment, the communication passage 11 is formed to be connected to the mill case 5 and the filtration chamber in a substantially tangential direction, so that the swirling air flow generated by the rotation of the cutter device 4 can be effectively transferred to the mill case 5. The air flow can be made to flow from the filter chamber to the filter chamber, and in combination with the effective air transfer by the air flow guide wall 19, the effect can be further enhanced.

In addition, in this embodiment, since the inner diameter of the upper part of the filtration chamber is larger than the inner diameter of the mill case 5, the movement of the coffee powder after being discharged from the communication passage 11 into the filtration chamber is faster than the movement inside the mill case 5. This makes it possible to more effectively deposit coffee powder in the filtration chamber due to the cyclone effect.

Furthermore, according to this embodiment, since the lower end surface of the air flow guide wall 19 is formed to be located lower than the lower surface of the hot water receiving plate 18, the coffee powder discharged into the filtration chamber from the communication passage 11 is first Since the coffee powder is circulated around the outer circumference of the air flow guide wall 19, it is possible to prevent the coffee powder from leaking to the outside through the gap between the coffee powder and the hot water receiving plate 8 formed inside the air flow guide wall 19.

In addition, since the hot water receiving plate 18 is provided inside the cylinder of the cylindrical air flow guide wall 19, hot water dripping from the hot water discharge lower onto the hot water receiving plate 18 is also prevented from scattering to the outside of the air flow guide wall 19. can.

Furthermore, according to the present embodiment, the lower end of the filter medium holder 17 is formed to be located directly above the basket 9, so that the lower end can press the filter medium 8 from above, thereby preventing the upper end of the filter medium 8 from turning over. This prevents the transferred coffee powder from entering between the filter medium 8 and the basket 9.

Further, since the powder transfer wall 20 extends to cover the upper part of the filter medium 8 and has a width larger than the width of the communication path 11, the coffee powder transferred through the communication path 11 enters the filtration chamber. The coffee powder is sufficiently guided, and coffee powder is not scattered in the filtration chamber of the communication path 11 due to turbulent flow near the side opening.

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

As explained above, according to the present invention, since the cylindrical air flow guiding wall is provided on the lower surface of the top wall of the filtration chamber, it is possible to transfer the coffee powder from the grinding chamber to the filtration chamber and to transfer the air between the coffee powder and the filtration chamber. separation can be carried out more efficiently and effectively.

[Brief explanation of drawings]

The drawings show an embodiment of the coffee maker according to the present invention, in which Fig. 1 is a longitudinal cross-sectional view of essential parts, 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.

Claims (1)

[Claims] comprising 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 and extracted as coffee liquid, a cylindrical airflow guide wall is provided on the lower surface of the ceiling wall of the filtration chamber at a position facing the outlet of the communication passage. A coffee maker with a unique feature.