JPH0423533B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to coffee boiling, and particularly to coffee boiling.
This invention relates to a coffee boiler that automates everything from grinding beans to extracting coffee and keeping it warm.

(Prior Art) Recently, the number of coffee lovers has increased, and electric coffee boilers such as the one shown in FIG. 8 or FIG. Coffee is becoming more and more popular, but it is also more convenient and delicious in terms of flavor and ease of cleanup.
It is hoped that there will be a coffee brewer that can brew coffee.

That is, FIG. 8 is a longitudinal cross-sectional view of a conventional coffee boiler in which the grinding of coffee beans and the extraction section thereof are performed at the same location, and FIG. 9 is a longitudinal sectional view of a conventional coffee boiler in which the grinding and extraction of coffee beans are performed at different locations. In both figures, M is the coffee bean grinding section;
D is a brewing part, W is a water container, and G is a coffee container into which extracted coffee is placed. Incidentally, H is a heater provided on the lower surface part, which is used to heat the water in the water container W to hot water and to keep the extracted coffee warm.

(Problems to be Solved by the Invention) Such a conventional coffee boiler, especially the one shown in FIG. 8, grinds coffee beans and extracts coffee at the same location. Because the mesh filter mm is used for extraction, the finely ground coffee beans enter the extracted coffee, making it cloudy and giving it a bad texture.Even when cleaning up the equipment after extraction, it is difficult to dispose of the coffee powder stuck in the mesh filter m. There were problems with this. In addition, in the structure shown in Fig. 9, the ground coffee powder is sent to the extraction part D by centrifugal force while grinding the coffee beans for extraction. Not only does it electrostatically adhere to the inner surface of the device, which does not contribute to the extraction of coffee, but it also poses a problem in cleaning.Furthermore, the device has many parts, making it cumbersome to clean after use.

The present invention aims to eliminate the problems of the conventional coffee boiler as described above and provide an automatic coffee boiler that is easy to operate and extracts delicious coffee without losing its flavor. .

(Means for Solving the Problems) The present invention has achieved the above object in an automatic coffee boiler equipped with a time switch and a thermostat that operates according to the water supply temperature. After controlling the switch to the water container side and performing time-limited control to drive the crushing means, the heating section is driven to temporarily stop the above-mentioned time-limited operation, and then when the thermostat is turned on, the time-limited operation of the time switch is started again. At the same time, the hot water supply flow path is switched to the storage chamber side, and the grinding means is timed controlled, and the hot water supply flow path is returned to the water container side for a certain period of time to extract coffee from coffee beans. Configure to extract and achieve.

(Function) With the above configuration, the present invention fully automates everything from grinding coffee beans and extracting coffee to keeping it warm, and in particular, it is possible to eliminate the problem of adhesion to the grinding part, which was wasted and was troublesome to clean. The pulverized fine powder of coffee can be automatically removed, and moreover, delicious coffee can be easily extracted as with manual extraction with a simple operation, and the equipment can be easily maintained.

(Example) Hereinafter, the present invention will be explained in detail by way of an example using the drawings.

FIG. 1 is an external perspective view of the coffee boiler of the present invention.As shown in the figure, the main body of the coffee boiler of the present invention is composed of a lower body AB, an upper body BB,
It has a water container W, a coffee container G, and an upper body BB.
Inside, a coffee bean grinding means, a coffee extraction means, and other essential components are built-in.

FIG. 2 is a longitudinal cross-sectional view mainly showing the main parts built into the upper main body BB of FIG. It has a mesh filter plate (hereinafter simply referred to as a filter) 4 in which predetermined micropores are formed over the entire surface. The grinding chamber 1 has a substantially conical shape and is integrally formed with the bottom communicating with the coffee bean storage chamber 5. When the coffee beans are ground, the cutter blade 3 kicks out the ground powder. Storage room 5
This prevents coffee beans from being connected and not flowing into the grinding chamber 1. The cutter blade 3 has four blades, and the two symmetrical tips 6 are bent toward the motor 2 by a slight angle θ with respect to the axis of the blades, and the angle θ is the same as the ground coffee. It is chosen to increase the centrifugal force of the bean powder being ejected.

The upper part of the storage chamber 5 has a hot water outlet 7, and a waterproof gasket 8 prevents the discharged hot water from entering the motor 2 side.
Absorbs the vibration of the motor 2 transmitted through the motor 2.
Reference numeral 11 denotes an upper body cover, 12 a coffee bean inlet, and 13 an inlet cover that covers the inlet. A cylindrical rib 14 is formed around the inner periphery to prevent leakage from the gap with the input port 12.

In addition, a steam hole 16 with a rib 15 is formed in the inlet lid 13, and a circular cross-section portion 17 is formed at one end of the steam hole 16. A hinge portion 21 between the input port cover 13 and the upper main body cover 11 is formed by forming a protrusion 20 along the circular arc portion 19 . 22 and 23 are for moisture entering the main body.
It is a waterproof seal that also serves as vibration proof. The filter 4 is integrally formed with a filter holder 25 that can be easily attached to and removed from the upper main body 24 to facilitate cleaning after use.

Further, 26 is a coffee extraction chamber with a lid 27 of the extraction chamber.
The guide rib 28 of the upper body 24 is provided on the side surface.
A guide portion 29 is formed along the guide portion 29 for lifting the extraction chamber 26 obliquely upward when the extraction chamber 26 is inserted into the device. A powder seal 30 made of an annular elastic body with an inverted U-shaped cross section is integrally formed on the extraction chamber lid 27, and when the extraction chamber 26 is inserted into the upper body 24, it is elastically fitted to the end surface of the filter holder 25, and thereby This prevents coffee powder and hot water from leaking.

Figure 3 is a longitudinal sectional view showing the water container, 31
is the water container, which can be freely attached to the lower body 32, and when attached, the upper surface is covered by the eaves part 33 extending from the upper body 24, and is connected to an elastic body by a spring 34 so as not to come off; At that time, the sensing chamber 35 provided in the lower body 32 via the valve 37'
is connected to. A thermostat 36 and a check valve 37 are provided on the bottom wall of the sensing chamber 35, and a sensing portion 38 of the thermostat 36 faces the sensing chamber 35. 39 is a heater that heats water (or hot water) from the water container 31 in a heating section 40, and the resulting hot water is pushed up through a water riser pipe 41 into a flow path switching chamber 42, and after coffee extraction is completed. The coffee is kept warm by a heater 39 controlled by the thermostat 36.

FIG. 4 is a side view showing a flow path switching chamber portion that changes the flow of water or hot water from the water container 31, and FIG. 5 is a front view thereof. In both of these figures, 42 is a flow path switching chamber, which includes a rising pipe inflow path 43 through which water (or hot water) flows from the rising pipe 41, a water container side outflow path 44 that opens on the water container 31 side, and a flow path for coffee beans. Storage room 5
an operating valve 46 that has a storage chamber side outflow path 45 that opens to the side and closes either the water container side outflow path 44 or the storage chamber side outflow path 45; It is comprised of a lever 47 that is actuated using a point a (see FIG. 3) as a fulcrum, and a flexible body 48 that moves in conjunction with the actuation.

One end 49 of the lever 47 is constantly biased clockwise by a spring 50 to close the storage chamber side outflow passage 45.

FIG. 6 is an electrical circuit diagram for operating the coffee brewer of the present invention. 51 is a time switch, which connects the timer motor 52 and AC power, and the heater 39.
circuit, or timer motor 52 and motor 2
switches Sia and Sib that selectively switch to the circuit of
Switch S ₂ interposed in the circuit of timer motor 52
It also has a built-in switch _S3 interposed in the motor 2 circuit.

Further, the circuit of the heater 39 and the circuits of the timer motor 52 and the motor 2 are connected through a thermostat 36 which becomes conductive when a predetermined temperature is reached.

Returning to FIG. 5, the diagram shows the time switch 51, in which a cam 54 is attached to a main shaft 53 for setting a time limit, and a cam 54 is driven via an arm 55 in connection with the time limit operation. It is configured to do this.

This operating rod 56 has an arm 55 attached to the crest of the cam 54.
If the spring 5 is in contact with the lever 47, the spring 5 is in contact with the lever 47.
0, the water container side outflow path 44 is closed, and when the trough of the cam 54 and the arm 55 are in contact with each other, the storage chamber side outflow path 45 is closed.

The cam 54 has three peaks 57, 58, 59 and 3.
Three troughs 60, 61, and 62 are formed, and the water (or hot water) flow path is sequentially switched in relation to the timed operation.

Furthermore, 63 is a recess provided in the cam 54, and a lock knob 64 that locks the input port lid 13 in the closed state.
It is formed integrally with the lock lever 67 and opposite the tip 68 of the lock lever 67 which is always biased in the direction of the arrow 66 by the spring 65, so that the input port cover 13 will not open unless the time switch 51 is turned on. being done.

69 is a start knob for turning on the AC power after setting the time limit, and 70 is a mounting plate for the time switch 51, lock lever 67, etc.

FIG. 7 is a side view showing the safety switch section,
The safety switch 71 is a micro switch, etc.
It is connected in series to the AC power circuit and attached to the main body cover 11, and is closed when the input port cover 13 is closed against a push rod 73 which is always biased upward by a spring 72. The spring 72 described above has a function of popping up the input port cover 13 when the lock knob 64 and the input port cover 13 are released from locking.

Since the present invention is constructed as described above, coffee beans are put into the storage chamber 5, the inlet lid 13 is closed, the water container 31 is filled with water, and the water container 31 is filled with water and set in the lower main body 32, and the time switch 51 is set to a predetermined position. If you set the timer and press the start knob 69, the switch S ₁ b
is closed (FIG. 6), the motor 2 starts rotating, and the timer motor 52 starts a timed operation.
At this time, the trough 60 of the cam 54 and the arm 55 come into contact (FIG. 5), and the water container side outflow path 44 is opened. When the coffee beans are sequentially crushed and kicked out to the extraction chamber 26, the switch S ₁ b is switched to S ₁ a, the operation of the motor 2 and the timer motor 52 is stopped, and at the same time, the heater 39 starts to be energized. (Figure 6).

At this time, the water in the water container 31 is returned to the water container 31 again through the heated water container side outflow path 44.
Thereafter, when the water temperature in the water container 31 reaches a predetermined temperature (FIG. 4), the thermostat 38 is turned on and power supply to the motor 2 and the timer motor 52 is started again. With the operation of the timer motor 52, the cam 54 immediately moves to a position where the crest 57 and the arm 55 come into contact, and the storage chamber side outflow passage 45 is opened (FIG. 6).

Therefore, the preheated hot water is returned to the heater 3.
9 to a high temperature and discharge it into the storage chamber 5, and the motor 2 diffuses it toward the inner wall surface of the storage chamber 5.
Storage chamber 5 and filter holder 25 in the crushing chamber 1
The fine powder of ground coffee beans adhering to the coffee bean powder is washed away.

After the predetermined time has elapsed, the motor 2 is turned on by the time switch 5.
1 opens the switch _S3 and stops it.

After that, the timer motor 52 continues its timed operation, and the cam 54 moves further, and after performing the primary hot water supply in the same manner as in general coffee extraction, it moves to the trough 61 and returns to the storage chamber side outflow path 45. The so-called "unevenness" process is performed for a certain period of time, and the peak part 58 is blocked.
and opens the storage chamber side outflow passage 45 to start secondary hot water supply, and at the same time opens switch S ₂ and ends the timed operation of the timer motor 52 (sixth
figure). Coffee extraction continues and the water container 31
When all the hot water inside is discharged, the thermostat 38
energization to the heater 39 is controlled intermittently to keep it warm and enter the keep warm state.

Although the present invention has been described above with reference to one embodiment, cleaning after use is completed by pulling out the extraction chamber 26, discarding the extracted ground coffee powder, and cleaning it.

As described above, according to the present invention, by switching the timer of the hot water supply flow path in this manner, flavorful coffee can be automatically extracted through so-called "uneven extraction".

(Effects of the Invention) As is clear from the above explanation, the present invention allows the time switch operation to be performed by a motor timer, and easily switches the hot water supply flow path or drives the motor using the electrical output generated by the thermostat. Not only can everything from coffee bean grinding to extraction be controlled automatically, but the coffee temperature, which is most affected by the taste of coffee, can be supplied to the optimum temperature, and the coffee that adheres to the grinding chamber can be controlled automatically. It has a great practical effect because even fine powder from beans can be washed.

[Brief explanation of drawings]

Figures 1 to 7 are diagrams showing the present invention.
The figure is a perspective view of the exterior, Figure 2 is a sectional view of the main parts, and Figure 3 is a sectional view of the main parts.
The figure is a sectional view of the water container and the hot water supply flow path, FIG. 4 is a side view showing the time switch section including the hot water supply flow path switching chamber, and FIG. 5 is a front view showing the time switch section.
FIG. 6 is an electrical circuit diagram of the present invention, FIG. 7 is a side view of the safety switch section, and FIGS. 8 and 9 are longitudinal sectional views of a conventional coffee brewer. W...water container, G...coffee container, 1...grinding chamber,
2...Motor, 4...Mesh filter plate (simply abbreviated as filter), 5...Storage chamber, 7...Discharge port, 11...
Upper body cover, 13... Input port cover, 21... Hinge part, 24... Upper body, 26... Extraction chamber, 27... Extraction chamber lid, 28... Guide rib, 29... Guide part, 31
...Water container, 32...Lower body, 33...Eaves part, 3
5... Sensing section, 36... Thermostat, 37... Check valve, 37'... Valve, 38... Sensing section, 39... Heater,
40... Heating section, 41... Water riser pipe inflow path, 44... Water container side outflow path, 45... Storage chamber side outflow path, 46... Operating valve, 47... Lever, 51... Time switch, 52
...Timer motor, 53...Spindle for time limit setting, 55...
Arm, 56... Operating rod, 57, 58, 59... Mountain part, 60, 61, 62... Valley part, 63... Concave part, 64
...Lock knob, 67...Lock lever, 69...Start knob, 71...Safety switch.

Claims (1)

[Claims] 1. A coffee extracting means having a grinding means including a coffee bean storage chamber, a hot water supply means including a water container and a heating section, a means for switching a hot water supply flow path from the hot water supply means, and a temperature of the hot water supply means. It consists of a thermostat that becomes conductive when a predetermined temperature is reached, a drive control mechanism for the crushing means and hot water supply means, and a time switch for controlling the hot water supply flow path switching means. The flow path is first controlled to switch to the water container side, and after timed control is performed to drive the crushing means, the heating section is driven to temporarily stop the timed operation, and then when the thermostat is turned on, the timed operation is started again. A timed operation of the switch is started to switch the hot water supply flow path to the storage chamber side, time control of the crushing means is performed, and the hot water supply flow path is returned to the water container side for a certain period of time to make coffee. A coffee boiler characterized by extracting coffee from beans.