JPH0226415Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The invention includes a grinding case for grinding coffee beans and an extractor for extracting coffee liquid, and automatically transfers the ground coffee powder in the grinding case into the extractor. This invention relates to a coffee making machine that is designed to introduce

[Technical background of the invention]

Recently, in this type of coffee making machine, coffee beans housed in a grinding case are ground by a blade-shaped grinding body to produce coffee powder, and this coffee powder is passed through a powder filter section provided on the side of the grinding case. It has been proposed that the coffee powder be dropped into an extractor located below the extractor, and that hot water from a hot water generating mechanism be supplied to the coffee grounds in the extractor to extract coffee liquid. In this case, the coffee powder produced in the grinding case is blown away in the centrifugal direction mainly by the rotating centrifugal force of the grinding body, and is sent from the powder filter section to the extractor side.

[Problems with background technology]

With the above configuration, when coffee beans are ground, the coffee powder tends to gather around the outer circumference of the grinding case due to the rotational centrifugal force of the grinding body. However, since the rotation range of the grinding body does not extend to the circumferential side of the grinding case, when coffee powder gathers around the outer circumference of the grinding case as described above, the proportion of coffee powder located outside the rotation range of the grinding body increases. As a result, the coffee powder is less likely to be directly subjected to the rotating centrifugal force of the grinding body. For this reason, it becomes difficult for the coffee powder to be blown away toward the powder filter section located in the centrifugal direction, making it difficult for the coffee powder to pass through the powder filter section. Ground tends to remain, and therefore, the amount of wasted coffee powder that is not collected in the extractor increases, which is uneconomical.

[Purpose of the invention] This invention was made in consideration of the above circumstances.
Therefore, the purpose of this is to prevent coffee powder from gathering around the outer periphery of the grinding case when grinding coffee beans, to efficiently send coffee powder from the powder filter to the extractor, and to improve the recovery of coffee powder. It is to provide a coffee making machine that can increase the rate.

[Summary of the idea]

In the present invention, guide portions having arcuate guide surfaces extending in an arc from the outer circumferential side toward the center are protruded from at least two locations on the lower surface of the lid that covers the upper opening of the crushing case, and the arcuate guide The airflow guiding action of the surface creates an airflow that flows from the outer circumference of the grinding case toward the center, and the coffee powder is carried on this airflow and returned to the center of the grinding case. .

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1, reference numeral 1 denotes a main body of a coffee making machine, of which a cartridge type water storage tank 2 is provided on the left side in the drawing, and a heating table 3 is provided on the lower right side. A well-known hot water generation mechanism consisting of a heating tube and a heater (not shown) is provided in the heating table 3, and the water in the water storage tank 2 is supplied into the heating tube and turned into hot water. 4 is a bottle placed on a heating table 3, 5 is a cup-shaped extractor placed above the bottle 4, and a hook hole 6 (see Fig. 2) formed on the outer periphery of the upper end is connected to the main body 1. It is detachably attached to the main body 1 by inserting it into a protrusion 7 formed in an upright shape. An extraction port 8 (see FIG. 1) is formed at the bottom of the extractor 5, and a valve device 9 for opening and closing the extraction port 8 is provided. When the extractor 5 is attached to the main body 1, the valve device 9 comes into contact with the bottle lid 4a placed on the bottle 4 and is in an open state. Reference numeral 10 denotes a vertical shaft type motor disposed on the main body 1 to be located on the left side of the extractor 5 in the figure, and a case mounting portion 11 is formed in the upper part of the motor 10. 12 is the case mounting part 1
A crushing case 1 is detachably attached to a crushing case 1, and a blade-shaped crushing body 13 rotatably driven by a motor 10 is provided at the inner bottom of the crushing case. A powder filter section 14 (see Fig. 2) is provided on the right side of the grinding case 12 by forming a large number of small holes, and this powder filter section 14 faces the upper opening of the extractor 5. There is. 15 is powder filter section 1
This is a hood part for guiding the coffee powder from 4 into the extractor 5, and is provided integrally with the grinding case 12 so as to cover the powder filter part 14 from the right side. A cylindrical hot water pan 16 is integrally formed on the upper surface of the hood 15, and a plurality of pouring holes 17 are formed in the inner region of the hot water pan 16. Reference numeral 18 denotes a cap part that covers the outer part of the hood part 15 of the upper opening of the extractor 5. This cap part is provided integrally with the lower end of the hood part 15, and a cap part 18 is inserted into the inner peripheral part of the upper end of the extractor 5 on the lower surface. A cylindrical portion 19 is integrally formed. The upper end of the paper filter 20 housed in the extractor 5 is held between the extractor 5 and the cylindrical portion 19.
Reference numeral 21 denotes a hot water supply spout which is rotatably provided above the hot water pan 16, and hot water generated by the heating pipe of the hot water generating mechanism described above is discharged from this hot water spout body 21 into the hot water pan 16. Reference numeral 22 denotes a lid removably placed over the opening of the top surface of the crushing case 12, and the bottom surface of this lid is a spherical concave surface. Reference numeral 23 denotes a guide portion protruding from the bottom surface of the lid 22. In this embodiment, this guide portion 23
are provided at two locations extending from the outer circumferential side toward the center of the lid 22, and the guide surface 24 of each guide portion 23 (the surface on the side where the air flow generated by the rotation of the crushing body 13 collides) is circular. It is formed into an arc shape, and the surface opposite to this is formed into a slope shape that is gentler than the arc-shaped guide surface 24.

Next, the operation of the above configuration will be explained. To extract coffee liquid, first, coffee beans and water are placed in the grinding case 12 and the water storage tank 2, respectively, and set in the state shown in FIG. Then, when the motor 10 is energized, the grinding body 13 rotates in the direction of arrow A shown in FIGS. 2 and 4, and the coffee beans are ground. As a result, when the generated coffee powder reaches a particle size smaller than the small holes in the powder filter section 14, it flies out of the powder filter section 14 due to the rotational centrifugal force of the grinding body 13, and is guided to the hood section 15 while being guided into the extractor 5. It falls onto the paper filter 20. During operation of such coffee beans, the rotation of the grinding body 13 causes an air flow (arrow 25 in FIG. )
is caused. When this air flow hits the arc-shaped guide surface 24 of the guide portion 23, the direction is smoothly changed to draw an arc along the arc-shaped guide surface 24 as shown by the arrow 26 in FIG. You will be guided towards the center. In this case, since the guide portions 23 (arc-shaped guide surfaces 24) are provided at two symmetrical positions on the lower surface of the lid 22, the direction of the air flow can be changed by the above-mentioned arc-shaped guide surfaces 24 at two locations inside the crushing case 12. As a result, airflows flowing from the outer circumference toward the center are generated at two locations, and each airflow returns the coffee powder on the outer circumference of the grinding case 12 to the center. to do. Therefore, the coffee powder, which tends to gather around the outer periphery under the rotational centrifugal force of the pulverizer 13, can be efficiently returned to the center of the pulverizer case 12 by the two air flows, and the outer periphery This prevents coffee powder from gathering on the sides. In addition, the air flow flowing in the direction of arrow 25 along the inner circumferential side of the crushing case 12 causes the lid to
The coffee powder blown up to the vicinity of the bottom surface of the grinding case 12 collides with the arc-shaped guide surface 24 and falls down, so that in the past, the coffee powder tends to be blown up to the top of the grinding case 12 and remain suspended there. Even the ground coffee powder can be efficiently returned to the grinding body 13 side. Furthermore, since the above two air flows pass each other in the center part of the grinding case 12, air becomes stagnant in this center part, and through this air stagnation area, the upper floating coffee powder in the grinding case 12 descends due to its own weight. This also removes the floating coffee powder from the top of the grinding body 13.
It can be returned to the side efficiently. As described above, the coffee powder on the outer peripheral side and the upper side of the grinding case 12 is actively returned to the rotation range of the grinding body 13 (within the range of the grinding force), is efficiently ground, and the coffee powder is Due to the centrifugal force of rotation of the grinding body 13, the effect of blowing the coffee powder toward the powder filter section 14 located in the centrifugal direction increases, and the coffee powder is efficiently sent from the powder filter section 14 to the extractor 5 side. Can be done. Therefore, the coffee beans in the grinding case 12 can be turned into coffee powder and efficiently collected into the extractor 5 in a shorter time than conventionally. After the crushing operation is completed, when the heater of the hot water generation mechanism is energized, the water in the water storage tank 2 is sequentially turned into hot water and discharged from the hot water supply spout 21 into the hot water receiver 16, and from the hot water pouring hole 17 into the hood section. 15 and drips onto the coffee powder on the paper filter 20. The dropped hot water permeates the coffee powder to extract the coffee extract from the coffee powder, is filtered by a paper filter 20, and drips as coffee liquid from the extraction port 8 into the bottle 4 and is stored.

It should be noted that the present invention is not limited to the embodiments described above or shown in the drawings, and can be modified in various ways without departing from the gist, such as a configuration in which three or more guide portions are provided.

[Effect of idea]

As is clear from the above description, the present invention uses airflow guided toward the center of the grinding case along each arcuate guide surface of the plurality of guide parts to crush coffee powder on the outer circumference of the grinding case when coffee beans are ground. Since the coffee powder can be returned to the center side, it is possible to prevent the coffee powder from gathering on the outer periphery of the grinding case, and the coffee powder can be efficiently sent from the powder filter section to the extractor side, thereby increasing the collection rate of coffee powder. It has the excellent effect of increasing

[Brief explanation of the drawing]

The drawing shows one embodiment of the present invention.
2 is an exploded perspective view of essential parts, FIG. 3 is an enlarged perspective view of the lid, and FIG. 4 is a plan view thereof. In the drawing, 5 is an extractor, 12 is a crushing case, 13
14 is a powder filter part, 22 is a lid, 23
2 is a guide portion, and 24 is an arcuate guide surface.

Claims (1)

[Scope of utility model registration request] Coffee beans stored in a grinding case are ground by a grinding body to produce coffee powder, and the coffee powder is stored in an extractor through a powder filter provided on a side surface of the grinding case, A coffee making machine characterized in that a guide portion having an arc-shaped guide surface extending in an arc shape from the outer circumferential side toward the center side is protruded from at least two places on the lower surface of the lid that covers the upper surface opening of the grinding case. .