JPS61131716A - Coffee extractor - 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] [Technical Field of the Invention] The present invention relates to a coffee extractor that extracts coffee liquid by pouring hot water onto coffee grounds housed in a case, and particularly relates to a coffee extractor that pours hot water into coffee grounds housed in a case to extract coffee liquid. Regarding an improved coffee extractor.

[Technical background of the invention]

In a coffee extractor, it is known that if hot water is evenly poured over the entire coffee grounds stored in the case, the coffee extract can be extracted uniformly from the entire coffee grounds, improving the extraction efficiency. Therefore, conventional methods have been used to cover the upper surface of the case with a pouring container having a plurality of pouring holes or a diffusion cap having a spherical convex diffusion section, and allowing the hot water to flow down onto the pouring container or the hot water diffusion section. , and tried to disperse the lagoon that falls on the coffee grounds.

[Problems with background technology]

However, in the case where the pouring container is placed over the top of the case, the hot water received in the pouring container falls directly onto the coffee grounds from the pouring hole, and the hot water falls out of the pouring hole. The hot water can only be poured directly below, and the dispersion of the hot water is still insufficient. In addition, in the case where the top surface of the case is covered with a diffusion cap, the hot water received on the top of the diffusion part spreads out in an annular shape and falls on the coffee grounds, so that only the coffee grounds located within the annular area fall on the coffee grounds. As in the case described above, the hot water is not sufficiently dispersed. Therefore, for any of the above conventional structures,
Since the hot water cannot be applied evenly to the entire coffee powder, the coffee extract cannot be extracted evenly from the entire coffee powder, resulting in a low extraction efficiency.

[Purpose of the invention]

The present invention was made in consideration of the construction situation, and therefore, its purpose is to sufficiently disperse the hot water that falls on the coffee grounds, so that the hot water can be uniformly supplied to the coffee grounds, and thereby,
An object of the present invention is to provide a coffee extractor that can improve coffee extraction efficiency.

(Summary of the Invention) The present invention provides a method for passing hot water through a dispersion made of a porous material.
The hot water was dispersed extremely finely so that it poured onto the coffee grounds.

[Embodiments of the invention]

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 5. First, in FIG. 1, reference numeral 1 denotes a coffee brewer container, of which a cartridge-type water storage tank 2 is installed on the left side in the figure, and a heating stand 3 is installed on the lower right side. A hot water generator @6 consisting of a heating tube 4 and a heater 5 is provided on the lower surface of the heating table 3, and the water in the water storage tank 2 is supplied into the heating tube 4 and turned into hot water. 7 is a bottle placed on the heating table 3, 8 is a vertical shaft type motor disposed in the center of the container body 1, and 9 is a case detachably attached above the motor 8 by means of bayonet engagement, for example. As shown in FIG. 2, the inner bottom of this is inclined downwardly toward the right side, and an outlet portion 10 is formed protruding from the lowest part thereof so as to be positioned above the bolt 7. Reference numeral 11 denotes a filtration filter made of, for example, a wire mesh provided at the inlet of the outlet portion 10, and 12 denotes a shaft insertion cylinder formed in an upright shape at the center of the bottom of the case 9, into which the rotating shaft 8a of the motor 8 is inserted. has been done. 13
is an auxiliary case detachably attached to the upper end of the case 9 by, for example, bayonet engagement means, and the inside of this case is crushed.
It is set at 14. The bottom surface of the auxiliary case 13 is constituted by a powder filter 15, which is formed by forming a large number of small holes in a metal plate, for example.

Reference numeral 16 denotes a blade-shaped pulverizer disposed at the inner bottom of the pulverizer 14, which is fixed to the upper end of a drive shaft 17 that is rotatably inserted through the center of the powder filter 15. 18
is a bottom solid member fixed to the lower end of the drive shaft 17, the upper surface of which is formed in a tapered shape that expands downward, and a joint part that is detachably connected to the rotating shaft 8a of the motor 8 is formed in the center part. has been done. 20 is a dispersion made of a porous material having countless water-permeable micropores, which is formed, for example, in a cylindrical shape,
Its lower end is removably supported by the bottom rigid member 18, for example, by bayonet engagement means. With the above configuration, the dispersion body 20 is rotated by the motor 8 at the center of the case 9. 21 is a hot water guide trough provided on the lower surface of the powder filter 15, one end of which protrudes outward from the case 9 (to the right in the figure) and is opened upward;
A pouring hole 21a located above the dispersion body 20 is formed at the other end. In order to prevent the coffee powder from falling into the hot water guide trough 21, small holes are not formed in the part of the powder filter 15 located directly above the lagoon guide trough 21, as shown in FIG. I have to. Further, in FIG. 1, 22 is a hot water supply pipe connected to the heating pipe 4, and the outlet end of this pipe faces the opening of the hot water guide 6m21. 23 is a cap placed over the upper opening of the auxiliary case 13, and 24 is a lid that extends over the upper part of the auxiliary case 13.

Next, the electrical configuration of this embodiment will be explained with reference to FIG. 4. Reference numeral 25 is a power plug, 26 is a safety switch that opens and closes in accordance with the opening and closing of M24, and 27 is a timer whose driving source is a mainspring, for example. The device has fixed contact pieces a, b, c and movable contact pieces d, e. The fixed contact piece a is connected to a tap 8C provided on the field winding 8b of the motor 8, and the fixed contact pieces S and C are connected to the thermostat 28. It is connected to the power plug 25 via two temperature fuses and the heater 5 of the hot water generation mechanism 6 in this order. When the operation knob (not shown) of the timer device 27 is operated to start the timing operation, the contact piece (d
-a), (d-b) and (e-c) are the fifth
It is set to open during the period indicated by the diagonal line in the time chart shown in the figure.

Next, the operation of the above configuration will be explained. To extract coffee liquid, first, coffee beans and water are placed in the auxiliary case 13 and the water storage tank 2, respectively, and set in the state shown in FIG. 1. Then, when the timer device 27 is operated to start the timing operation, the contact piece (d-a) is closed and the field winding 8b of the motor 8 is energized through the tap 8C.

As a result, the motor 8 rotates at high speed, and the coffee beans in the auxiliary case 13 are efficiently ground. When the ground coffee powder reaches a particle size smaller than the small holes of the powder filter 15, it sequentially falls from the powder filter 15 and is received in the case 9. When the elapsed time of the coffee bean grinding operation reaches a preset time, the space between the contact pieces (cl-a) is opened, and the space between the contact pieces (d-b) and the contact pieces (e-c) is opened.
) are both closed and the operation automatically shifts to coffee liquid extraction operation. The opening between the contact pieces (d and b) energizes the heater 5 of the hot water production system 6, so that the water supplied from the water storage tank 2 into the heating pipe 4 is heated to produce hot water. The boiling pressure causes the water to flow from the hot water supply pipe 22 to the hot water guide trough 21.
The molten metal is discharged into the inside of the dispersion body 2o and flows down from the pouring hole 21a into the inside of the dispersion body 2o. On the other hand, between the contact pieces (d-b) and between the contact pieces (e-C
By opening the gap between the coils, current flows through the entire field winding 8b of the motor 8. Therefore, when extracting coffee liquid, the motor 8 rotates at a lower speed than when grinding coffee beans, and the motor 8 rotates at a lower speed than when grinding coffee beans. As a result, the dispersion body 20 rotates at a relatively low speed. As described above, the hot water from the hot water generation mechanism 6 flows down inside the dispersion body 20 that is rotationally driven in this manner, and this hot water spreads in the vertical direction along the inner peripheral surface of the dispersion body 20 due to centrifugal force. It passes through numerous micropores of the dispersion body 20. In this process, the hot water is dispersed finely enough;
As shown by the arrow in FIG. 2, the coffee powder in the case 9 falls in the form of mist. As a result, the hot water is evenly applied to the entire coffee powder, so the hot water permeates all the coffee grounds uniformly, flows down while extracting the coffee extract from all the coffee grounds, and is filtered by the filtration filter 11. It flows out from the outlet 10 and is stored in the bottle 7 as coffee liquid.

As described above, according to this embodiment, by passing the hot water from the intestinal production killing mechanism 6 through the dispersion body 20 made of a porous material, the hot water can be sufficiently finely dispersed and sprinkled on the coffee powder in the form of a mist. This allows hot water to be evenly distributed over the coffee grounds.
Coffee extract can be extracted evenly from the entire coffee powder, thereby improving coffee extraction efficiency.

Further, according to this embodiment, the crushing body 1 is provided in the upper part of the case 9.
Since the powder filter 15 is provided at the bottom of the grinding chamber 14 and the powder filter 15 is provided at the bottom of the grinding chamber 14, the following effects of the embodiment can be obtained.

That is, the coffee powder ground by the grinding body 16 falls from the grinding chamber 14 through the powder container 15 into the case 9 one after another, and does not stay in the grinding chamber 14 all the way, so the grinding body 16 rotates at high speed. The coffee powder is no longer exposed to the generated frictional heat for a long time, and the coffee powder is prevented from deteriorating in quality due to the frictional heat, and the flavor of the extracted coffee liquid is not impaired. Moreover, since the coffee powder is not pressed against the filter 11 of the case 9 by the grinding body 16 when coffee beans are ground, the filter 11 of the case 9 is not pressed against the coffee powder.
1 will not become clogged during grinding of coffee beans, and the filtering performance of the filter 11 can be maintained well.

In addition, since the motor 8 is configured to rotate at a lower speed when extracting coffee liquid than when grinding coffee beans, the rotational speed of the dispersion 20 is kept low during extraction of coffee liquid, and the fine pores of the dispersion 20 are It is possible to prevent excessive centrifugal force from acting on the hot water passing through. For this reason, the dispersion 2o
Since it is possible to prevent the scattering speed of the hot water passing through from becoming unnecessarily high, it is possible to prevent a difference in the amount of hot water being supplied between the central portion and the outer peripheral portion of the case 9.

That is, if the motor 8 is rotated at the same speed as when grinding coffee beans when extracting coffee liquid, the rotational speed of the dispersion body 20 becomes too high, so the scattering speed of the hot water passing through the dispersion body 20 becomes high. As a result, the scattering distance of the hot water increases as a whole, and the amount of hot water that falls on the vicinity of the dispersion body 20, that is, the center part of the case 9, decreases, and the amount of hot water that falls on the outer periphery part decreases. Since the amount of hot water increases, there is a risk that there will be a difference in the amount of hot water supplied depending on the location, but this does not occur in this embodiment.

Further, since the dispersion body 20 is formed into a cylindrical shape and is supported by the bottom solid member 18 which is rotated integrally with the rotating shaft 8a of the motor 8, the dispersion body 20 is supplied inside the dispersion body 20. The hot water can be passed through the fine pores of the dispersion body 20 while being spread vertically along the inner circumferential surface of the dispersion body 20 by the rotational centrifugal force, and the hot water can be dispersed more effectively.

FIG. 6 shows a second embodiment of the present invention.
In the embodiment, grinding of coffee beans and extraction of coffee liquid are performed in the same case 30, and the specific structure thereof will be explained below. That is, the bottom surface of the case 3o is made of, for example, a metal bottom plate 31 having a large number of small holes.
A drive shaft 32 is rotatably inserted and supported. A blade-shaped crushing body 33 is fastened and fixed to the upper end of this drive@32 by a fastening member 34. 35 is a dispersion body made of porous material formed in the shape of a container, and a mounting hole 35a formed at the bottom of this dispersion body is connected to the tightening member 34.
is attached to. Reference numeral 36 denotes a cap that is removably attached to the upper opening of the case 30, and a cylindrical hot water pan 37 is formed in the center of the cap so as to be located above the dispersion body 35. A pouring hole 37a is formed inside the portion 37. A hot water supply arm 38 is rotatably connected to the upper end of the hot water supply pipe 22 , and the outlet end of this arm is located above the hot water receiver 37 . On the other hand, 39 is a filtration filter attached to the lower surface of the bottom plate 31, and 40 is a receiver attached to the lower end of the case 30, which has an outlet for letting the coffee liquid filtered by the filtration filter 39 flow into the bolt 7. A portion 41 is formed.

In the second embodiment configured as above, case 3
After grinding the coffee beans in the 0, hot water is discharged from the hot water supply arm 38 into the hot water receiver 37 when coffee liquid is extracted, and is poured into the dispersion body 35 driven by the motor 8 rotating at a low speed from the pouring hole 37a. Flow down. The hot water that flows down is dispersed extremely finely as it passes through the numerous micropores of the dispersion body 35 due to centrifugal force, and then falls on the coffee powder in the case 30 in the form of a mist, so that the coffee is evenly removed from the entire coffee powder. Extract the extract.

Note that the dispersion body does not necessarily need to be rotationally driven by a motor (for example, the dispersion body may be formed in the shape of a shallow container and placed over the top of the case so that the dispersion body remains stationary with respect to the case). However, since the hot water is sufficiently dispersed in the process of passing through the numerous micropores of the dispersion body under its own weight, the intended purpose can be fully achieved.

〔Effect of the invention〕

As is clear from the above description, the present invention allows the hot water to pass through a dispersion made of a porous material, so that the hot water can be sufficiently finely dispersed and applied to the coffee grounds, so that hot water can be evenly supplied to the coffee grounds. Therefore, the coffee extract can be extracted evenly from the whole coffee powder, and the coffee extraction efficiency can be improved.

[Brief Description of the Drawings] Figures 1 to 5 show a first embodiment of the present invention, in which Figure 1 is an overall vertical sectional front view, Figure 2 is an enlarged vertical sectional front view of main parts, Figure 3 is a partially cutaway perspective view of the main parts;
5 is an electric circuit diagram, FIG. 5 is a time chart diagram, and FIG. 6 is a diagram corresponding to FIG. 2 showing a second embodiment of the present invention. In the drawing, 8 is a motor, 9 is a case, 14 is a crushing chamber, 15
1 is a powder filter, 16 is a crusher, 18 is a solid member, 20 is a dispersion body, 30 is a case, 33 is a crusher, and 35 is a dispersion body. Applicant: Toshiba Horse Co., Ltd. 1 Figure 2 Figure 3 Figure j\i, 4 (2) Figure 5

Claims (1)

[Scope of Claims] 1. In a device in which coffee liquid is extracted by supplying hot water to coffee grounds stored in a case, porous holes are provided to disperse the hot water supplied to the case and fall onto the coffee grounds. A coffee extractor characterized by being provided with a dispersion body made of solid material. 2. A pulverizer for pulverizing the coffee beans housed inside the case is provided in the case, and the dispersion element is formed in a container shape and rotates together with the pulverizer. The coffee brewer described in. 3. A grinding chamber containing a grinding body is provided in the upper part of the case, and a powder filter is provided at the bottom of the grinding chamber to allow the coffee powder ground by the grinding body to fall into the case. A coffee brewer according to claim 1 characterized in that: 4. Coffee extraction according to claim 2 or 3, characterized in that the motor that drives the grinding body and the dispersion body is rotated at a lower speed when extracting coffee liquid than when grinding coffee beans. vessel. 5. According to any one of claims 2 to 4, the crushing body is formed in a cylindrical shape and is supported by a solid bottom member that is rotated integrally with the rotating shaft of the motor. Coffee brewer as described.