JPH02124112A - Coffee manufacturing machine - Google Patents

Abstract

PURPOSE:To improve the flavor of coffee liquid to be extracted and to obtain compact constitution by selectively transmit the rotational force of a motor to a crushing body and a case by clutch mechanism, rotating the crushing body in the case at the time of crushing, crushing coffee beans and rotating the case unitedly with the crushing body at the time of extracting. CONSTITUTION:The coffee beans are housed into a case 11 and a motor switch is turned on. Then, a motor 7 is regularly rotated. A crushing body 9 is rotated and the coffee beans are crushed. After crushing operation is executed only for a set time, electrification to a heater 5 is started and the motor 7 is reversely rotated. Thus, both inner and outer shafts 10 and 12 are unitedly rotated and the case 11 is rotated unitedly with the crushing body 9 at a high speed. Water to be supplied from a water tank 2 into a heating tube 6 is heated and successively caused to be hot water. Then, the hot water is supplied through hot water falling ports 25a and 21a into the case 11. While an essence is extracted, the hot water to permeate into coffee powder A is comparatively speedily passed through the coffee powder A by rotary centrifugal force and scattered from a filting part 22 to surroundings. Then, the hot water is received by the inside wall of an armor case 17.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a coffee making machine having both the functions of grinding coffee beans and extracting coffee liquid.

(Prior Art) Conventionally, the general configuration of this type of coffee making machine is that a case equipped with a grinding body and a filter is placed above a motor, and the grinding body is rotated by the motor to move inside the case. coffee beans are ground, and then hot water is supplied from a hot water supply mechanism into the case to extract coffee liquid.

(Problems to be Solved by the Invention) The conventional configuration described above has the advantage of being convenient and easy to use because both pulverization and extraction can be performed within the same case. However, on the other hand, since the hot water supplied into the case permeates downward through the deposited layer of coffee grounds on the filter and is filtered by the filter, the residence time of the hot water inside the case is generally long. Ingredients that tend to become too strong, thereby detracting from the flavor of coffee grounds (e.g. bittering ingredients)
There was a drawback that even the coffee liquid was extracted, impairing the flavor of the coffee liquid. These drawbacks become more noticeable as the amount of coffee powder increases and the particle size becomes finer, and improvements in this aspect have been desperately desired.

The present invention has been made in consideration of these circumstances, and therefore, its purpose is to provide a coffee making machine that is capable of improving the flavor of the extracted coffee liquid, in a machine that is equipped with functions from grinding coffee beans to extraction. is to provide.

[T+LI$NUMBER OF THE INVENTION] (Another means for solving the problem) The coffee making machine of the present invention includes a case that is rotatably provided and has a filtration part for extracting coffee liquid on the outer periphery, and a grinding body for grinding coffee beans rotatably installed in the case; a hot water supply mechanism that supplies hot water into the case during extraction; a motor operated during grinding and extraction; When brewing, the rotational force of the motor is transmitted to the case and the case is rotated, thereby causing the hot water to pass through the coffee powder by rotational centrifugal force and extracting coffee liquid from the filtration section. - A clutch mechanism for extraction.

(Function) When extracting coffee liquid, first, the coffee beans are housed in the case, and then the machine is started (-1) The rotational force of this motor is transmitted to the grinding body via the clutch mechanism. death,
This grinding body is rotated to grind coffee beans. In the extraction process after the grinding is completed, hot water is supplied from the hot water supply mechanism to the coffee powder in the case, and the rotational force of the motor is transmitted to the case by the clutch mechanism (7. The case is rotated. - A rotating centrifugal force is applied to the hot water supplied in the case, whereby the hot water passes through the coffee powder relatively quickly and is extracted with the coffee liquid from the filtration part on the outer periphery of the case.

(Example) Hereinafter, one example of the present invention will be described based on the drawings. 1-
1 is the main body case of the coffee making machine, and a cartridge-type water storage tank 2 is provided on the left side of the case, and a heating table 4 on which a bottle 3 for storing coffee liquid is placed is placed on the lower right side.
is provided.

A heater 5 and a heating tube 6 are attached to the bottom side of the heating table 4, and water is poured into the heating tube 6 from the water storage tank 2 ('!
You will be paid a full salary. Reference numeral 7 denotes a vertical shaft type motor disposed between the water storage tank 2 and the bottle 3. This motor 7 is a commutator motor that rotates at approximately 10,000 rpm+, for example, and is configured so that its rotation direction can be reversed forward or reverse. has been done. An inner shaft 10 for driving a crushing body 9, which will be described later, is vertically fixed to the upper end of the rotating shaft 8 that projects upwardly from the motor 7. Then, a hollow outer shaft 12 for driving the case 11, which will be described later, is fitted to the outer periphery of the rotating shaft 10 so as to be relatively rotatable.
is rotatably supported by the main body case 1 via a bearing 13 having a sealing function. 14 is a clutch mechanism that selectively transmits the rotational force of the motor 7 to the outer shaft 12;
A coil spring] 5 is wound so as to straddle the lower end large diameter portion 10a of the outer shaft 12 and the lower end of the inner shaft 10 with a fixing pin]-6. In this case, the clutch mechanism 14 is configured as a friction type one-way clutch, and when the motor 7 is in forward rotation 1-, the coil spring 15 is fixed to the outer shaft 12. The rotational force of the motor 7 is not transmitted to the outer shaft 12, and only the inner shaft 10 is driven to rotate.On the other hand, when the motor 7 rotates in the opposite direction, the coil spring 15 is wound around the outer shaft 12 by frictional force. It is in a tightened state, and both shafts 10.12 are rotationally driven as one.

In the upper part of the clutch mechanism 14,! The A+A gasket 17 is detachably provided, and a flow outlet 1-8 formed at the bottom right end of the outer case 17 faces the top opening of the bottle 3. A case 11 for coffee bean grinding and coffee liquid extraction stopper is housed in this exterior case 17, and a cylindrical joint 19 (a second closed The valve 11k) is fitted into the connecting portion 12a at the upper end of the support 12, thereby supporting the case 11. In this case, the inner circumferential surface of one cylindrical joint and the outer circumferential surface of the connecting portion 12a are both formed in an uneven shape, and the rotation of both L! -I'm trying to get 7th.

Further, a crushing body 9 is rotatably provided in the case 11, and a connection hole 2 formed at the bottom of the blade 20 of the crushing body 9 is provided.
0a is fitted and connected to the upper end of the inner shaft 10. on the other hand,
The top opening of the case 11 is covered with a lid 21 having a hot water drop port 21a in the center, and a gap of, for example, about 0°2 is uniformly formed between the lid 21 and the top end of the case 11.
The gap serves as a filter section 22. Is it heading towards this filtration section 22? ! In order to raise the (coffee liquid) by rotational centrifugal force, the inner peripheral surface of the case 11 is formed into a tapered surface shape that widens at the upper side. In this case, the lid 21 is fixed by engaging an engaging claw 23 formed on the lid 21 with a bayonet engaging groove 24 formed on the upper edge of the case 11. Also, in the upper opening of the exterior case 17,
A lid 25 having a hot water drop port 25a in the center is placed over the lid. Above this M2S, a hot water supply arm 26 that communicates with the heating pipe 6 is provided so as to be horizontally rotatable.
The hot water outlet 26a of the hot water outlet 26a can be positioned directly above the hot water falling port 25a of the lid 25. The hot water supply arm 26, the heating pipe 6, and the sweater 5 constitute a hot water supply mechanism 27. Note that 28 is a lid provided on the upper surface of the main body case 1.

Next, the electric circuit configuration will be explained based on FIG. 3.

Two power switches are provided on the front operation panel (not shown) of the main body case 1. Reference numeral 30 designates a mill timer circuit for setting the grinding time of coffee beans, which energizes the relay drive coil 31 during the timekeeping operation and cuts off the power to the relay drive coil 31 after the timekeeping operation is completed. This relay drive coil 3
While power is being applied to heater 1 (during crushing operation), switch 3 of heater 5 is turned on.
2 is turned off to cut off the power to the heater 5. On the other hand, when the relay drive coil 31 is cut off, the switch 32 is turned back on to enable the heater 5 to be energized.

A thermostat 33 is connected in series to the heater 5, and is turned off to cut off power to the heater 5 when the heater 5 becomes overheated. On the other hand, 34 is a motor switch for automatically stopping the motor 7. In order to drive this, a normally closed thermostat 36 and a relay drive coil 37 are provided in series, and when the relay drive coil 37 is energized, , the motor switch 34 is turned on. In this case, the thermostat 36 is attached to the heating stand 4, and the heating tube 6
When the water supply to the heater 5 is finished and the temperature around the heater 5 rises rapidly, the thermostat 36 is turned off and the relay drive coil 37 is cut off, which turns the motor switch 34 off and turns off the motor. 7 is stopped. On the other hand, in order to reverse the rotation direction of the motor 7, the field coil 38. Two changeover switches 40.41 are provided in the current supply path to the armature coil 39, and the switching operation of both changeover switches 40.41 is performed by the relay drive coil 31 described above.

In this case, during the crushing operation (when the relay drive coil 31 is in the a state), the movable contact 40a of one changeover switch 40 contacts the fixed contact 40b, and the movable contact 41a of the other changeover switch 41 contacts the fixed contact 41b. to rotate the motor 7 in the forward direction. During the extraction operation (when the relay drive coil 31 is disconnected), the movable contact 40a of one changeover switch 40 is switched to the fixed contact 40c side, and the movable contact 41a of the other changeover switch 41 is switched to the fixed contact 41c side. is switched to form a reverse rotation circuit, and the motor 7 is rotated in the reverse direction.

Next, the operation of the above configuration will be explained. The procedure for extracting coffee liquid is first to supply water to the water storage tank 2, and to accommodate coffee beans in the case 11, which is set in the state shown in FIG. 1. Next, when the two power switches are turned on, the relay drive coil 37 is energized, the motor switch 34 is turned on, and the motor 7 rotates forward. By the forward rotation of the motor 7, the crushing body 9 is rotated and the case 1 is rotated.
The coffee beans in 1 are ground. During this crushing operation, the rotating direction of the motor 7 is the loosening direction for the coil spring 15 of the clutch mechanism 14, so the coil spring 15 loosens from the outer peripheral surface of the outer shaft 12, and the rotational force of the motor 7 is applied to the outer shaft 12. is not transmitted, and the case 11 maintains a substantially stopped state.

This kind of crushing operation is carried out for a set time (e.g. 30-40 seconds)
After the timer circuit 30 for milling has been executed, the clock operation of the mill timer circuit 30 is completed and the relay drive coil 31 is cut off. As a result, the switch 32 of the heater 5 is turned on to start energizing the heater 5, and the switch 32 of the heater 5 is turned on.
is switched to form a reverse rotation circuit, and the motor 7 rotates in reverse.

Since this rotational direction is the tightening direction for the coil spring 15 of the clutch device fM 14, the coil spring 5 is tightened on the outer peripheral surface of the outer shaft 12, and the motor 7
The rotational force is also transmitted to the outer shaft 12.

Therefore, both the inner and outer shafts 10 and 12 rotate integrally (7, the case 11 rotates at high speed integrally with the crushing body).

On the other hand, the water supplied from the water storage tank 2 to the heating pipe 6 is heated and sequentially turned into boiling water by the electric current applied to the heater 5 described above], and the boiling water is sequentially pushed to the hot water supply arm 26 by the boiling pressure. Both lids 25.
21-4 Fall [T] Case 11 through 25a and 21a
It is easy to supply within. In this case, since the case]1 is rotating at high speed together with the grinding body 9, the centrifugal force of the rotation causes the coffee powder A to stick to the inner wall of the case]1, as shown in Fig. 2. As a result, the central part becomes hollow, and a drop of hot water drips into the hollow part and is not received by the crushing body 9 or the inner bottom surface of the case. And the crushed body 9''-
The hot water received by the pulverizer 9 is thrown around in a centrifugal direction by the rotation of the pulverizer 9, scatters 17, and penetrates into the coffee powder A from the inner circumferential side.

Further, the hot water received on the inner bottom surface of the case 11 permeates into the coffee powder A along the inner bottom surface due to the centrifugal force caused by the rotation of the case 11. In this way, the coffee is penetrated into the container A.1. Extract extract from coffee powder A using boiling water 1
- However, due to the rotating centrifugal force, it passes through the coffee powder container relatively quickly and reaches the inner wall of case 11, and then rises along the tapered surface of the inner wall and reaches the upper end of case 1]. It scatters to the surroundings from a small gap between the lid 21, that is, the filtration part 22, and is received by the inner wall of the outer case 17. At this time, in the filtration section 22, the coffee powder A is filtered and only the coffee liquid is extracted. stop.

The coffee liquid received on the inner wall of the outer case 17 is
The water flows downward along the inner wall, and finally drops into the bottle 3 from the flow [118] and is stored.

Then, when all the water in the water storage tank 2 is heated in the heating tube 6, the temperature of the heater 5 and the heating tube 6 rises rapidly)
I. The thermostat 36 is turned off (7) The power to the L/- drive coil 37 is cut off. As a result, the motor switch 34 is turned off, the motor 7 is stopped, and the extraction process is completed. Depending on the temperature of the coffee liquid in the bottle 3 (temperature of the heating table 4), the thermostat 1-' 33 repeatedly opens and closes 1. to intermittently energize the heater 5 and keep the coffee liquid in the bottle 3 warm.

According to the above embodiment, the clutch mechanism 14 selectively transmits the rotational force of the motor 7 to the crushing body 9 and the case. Not only can coffee beans be crushed by rotating the coffee beans, but during extraction, by rotating the case 1 together with the grinding body at high speed, the centrifugal force of the rotation allows the hot water to pass through the coffee powder container relatively quickly. With this centrifugal extraction method,
Even if the particle size of coffee powder A becomes fine or the amount increases,
The residence time of hot water in the case 11 is longer than before.
1. Extract only the original aromatic ingredients from coffee powder A. There is no need to extract components that impair the flavor, and the flavor of the coffee liquid is stabilized and good regardless of the particle size of the coffee powder A.

Moreover, since the grinding and extraction processes can be performed within one case 11, and the grinding body 9 and the case 1 can be selectively rotated using one motor 7, the configuration can be improved. It is simple and compact, and can be easily cut into small pieces, for example, as a home coffee making machine.

In the above embodiment, the clutch mechanism 14 is configured with I'7 as a one-way clutch. Therefore, by reversing the rotational direction of the motor 7, the crushing body 9 and the case 11 can be selectively rotated, and the structure of the clutch mechanism 14 is extremely simple +1i and low cost. ]・It is possible to In this case, as the one-way clutch, in addition to the one using the coil spring 15 as in the embodiment described above, it is also possible to use one with other configurations, such as a sprag-type clutch.

However, the present invention does not limit the clutch mechanism to a one-way clutch, but includes, for example, an electromagnetic clutch, a conical clutch,
A configuration may also be adopted in which a disk clutch ': 9 is adopted and the latch is switched before and after coffee liquid extraction. In this case, there is no need to reverse the rotation direction of the motor.

Further, in the above embodiment, the filtration part 22 is a narrow gap formed between the upper end of the case 11 and the lid 21. Good as a club.

In addition, the present invention provides both the inner and outer shafts 10, 12 and the crushing body 9. Various modifications are possible, such as changing the connection structure with the case 11 as appropriate.

[Effects of the Invention] As is clear from the above description, the present invention has a structure in which the rotational force of the motor is selectively transmitted to the crushing body and the case by a clutch mechanism, so that the crushing body is rotated within the case during crushing. Of course, you can grind coffee beans by
During extraction, by rotating the case integrally with the grinding body, hot water can be passed through the coffee grounds relatively quickly due to rotational centrifugal force, and the coffee liquid can be extracted, thereby extracting the original aroma from the coffee grounds. It is possible to extract only high-value components without extracting components that impair the flavor, and the flavor of the coffee liquid to be extracted can be stably improved.

In addition, it is possible to perform everything from crushing to extraction within one case, and the crushing body and case can be selectively rotated with one motor, making the configuration simpler and more compact. It also has the advantage that it can be easily used, for example, as a home coffee making machine.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is an overall longitudinal sectional front view, Fig. 2 is an enlarged longitudinal sectional front view of the case portion to explain the action during extraction, and Fig. 3 is an electrical FIG. In the drawing, 1 is a main body case, 2 is a water storage tank, 3 is a bottle, 5 is a heater, 6 is a heating tube, 7 is a motor, 9 is a crusher,
11 is a case, 14 is a clutch mechanism, 15 is a coil spring, 17 is an exterior case, 22 is a filter section, 26 is a hot water supply arm, and 27 is a hot water supply mechanism. Figure Figure Figure Figure

Claims (1)

[Claims] 1. A case that is rotatably provided and has a filtration part for extracting coffee liquid on the outer periphery, a grinding body for grinding coffee beans that is rotatably provided within the case, and hot water is supplied into the case during extraction. a motor that is operated during crushing and extraction; and a motor that transmits the rotational force of the motor to the crushing body during crushing, and transmits the rotational force of the motor to the case during extraction to rotate the case. and a clutch mechanism for causing the hot water to pass through the coffee grounds using rotational centrifugal force and extracting the coffee liquid from the filtration section.