JPS5816350Y2 - coffee making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved coffee making machine that obtains coffee liquid by supplying hot water into a coffee bean grinding chamber.

Conventionally, as a type of coffee making machine, a grinding body driven by a motor is disposed, and a coffee bean grinding chamber is heated by an electric heater, and hot water is supplied into the coffee bean grinding chamber to obtain coffee liquid. A configuration equipped with a hot water supply device is provided.

However, the conventional coffee making machine described above is configured to include a first operation switch for driving the motor and a second operation switch for driving the hot water supply device. Grind the coffee beans in the coffee bean grinding chamber by operating the operation switch,
Thereafter, the user has to go through the troublesome procedure of operating a second operation switch to drive the hot water supply device, which has the drawback of being inconvenient to use.

In addition, the time for grinding coffee beans, that is, the time for energizing the motor, is
Since the decision was made based on the intuition of the user, the degree of grinding of the coffee beans was not constant, and situations such as over-pulverization or under-pulverization were likely to occur, and the concentration of the coffee liquid varied each time the coffee liquid was produced.

The present invention was developed in view of the above circumstances, and its purpose is to improve usability, eliminate the risk of over- or under-grinding of coffee beans, and always produce coffee of approximately the same concentration. To provide a coffee making machine that can produce liquid and other effects.

An embodiment of the present invention will be described below with reference to the drawings.

First, in FIG. 1, 1 is a machine body, which includes a mill mechanism 2 for grinding coffee beans, a drip mechanism 3 for dripping hot water into the ground coffee beans, and a liquid for storing coffee liquid. A reservoir 4 is also provided, and the machine body 1 will be described in detail below.In other words, a motor storage part 5 and a liquid reservoir mounting part 6 are provided on both left and right sides of the lower half of the machine body 1, respectively. , Furthermore, there is a case attachment part 7 on both the left and right sides of the upper half.
and a water storage tank 8, respectively.

Reference numeral 9 denotes a heating plate made of a thermally conductive material provided on the lower surface of the liquid reservoir mounting portion 6, in which an electric heater such as a sheathed heater 10 and a heating pipe 11 are buried in parallel, and one end of this heating pipe 11 is buried. is extended upward and connected to a water outlet (not shown) of the water storage tank 8 to form a water supply pipe 12, and the other end is extended to the upper part of the case mounting portion 7 to form a hot water supply pipe 13.

14 is a thermostat provided on the bottom surface of the heating plate 9 to sense the temperature thereof.

Reference numeral 15 denotes a case attached to the case attachment part 7, and the interior thereof serves as a coffee bean grinding chamber 16.

A cutter 18, which is a grinding body for grinding coffee beans, is attached to the upper end of the drive shaft 17, which is watertightly inserted into the center of the bottom 15a of the case 15, and a joint 1 is attached to the apricot end.
9 is attached, and this joint 19 is connected to a joint 21 of a motor 20 disposed within the motor storage portion 5.

Reference numeral 22 denotes a filter that is installed in the case 15 and below the cutter 18 to receive the coffee powder ground by the cutter 18.

Note that 23 is a starting switch disposed on the outer surface of the lower part of the fuselage 1.

Next, the configuration of the electric circuit will be explained according to FIG.

24 is a power plug, one end of which is connected to the AC bus 25 through the normally closed contact of the timer switch T, and the other end connected to the common bus 26 through the contact piece C-8 of the starting switch 23. ing.

Incidentally, the timer switch T sets the timer operation time to 0, for example.
It can be set to about 12 hours, and the normally closed contact is opened during the timekeeping operation, and the normally closed contact is returned to close when the timekeeping operation is stopped.

In addition, the AC bus 25 is connected to a rectifier diode 27 with the polarity shown.
It is connected to the DC bus 28 via.

Reference numeral 29 denotes a relay as a switching means, whose movable contact piece C is connected to the common bus bar 26, and whose normally open contact piece a is connected to the sheathed heater 1.
0. It is connected to the AC bus bar 25 via the temperature fuse 30 and the thermostat 14, and the normally closed contact piece is connected to the sheathed heater 10 and the temperature fuse 30 via the motor 20.
connected to a common connection point.

Further, one end of the excitation coil 29 a of the relay 29 is connected to the DC bus 28 , and the other end is connected to the common bus 26 via the collector-emitter of the transistor 31 .

Reference numeral 32 denotes an electronic timer including the transistor 31 described above, and a resistor 33 . A series circuit of a variable resistor 34 serving as an adjustment means and a capacitor 35 for charging and discharging is connected, and the variable resistor 34
A series circuit of a Zener diode 36 and a resistor 37 of the polarity shown is connected between the common connection point of the capacitor 35 and the base of the transistor 31.

This electronic timer 32 is connected to the start switch 2.
This is a well-known configuration in which charging of the capacitor 35 is started by opening/closing contact C-a of No. 3, and when the terminal voltage of the capacitor 35 exceeds the Zener voltage of the Zener diode 36, the transistor 31 is turned on. , by adjusting the charging speed of the capacitor 35 with the variable resistor 34, the set time, that is, the contact piece C- of the start switch 23
The time from when the transistor 8 is closed until the transistor 31 is turned on can be changed.

Further, the common connection point of the variable resistor 34 and the capacitor 35 is connected to the fixed contact piece of the starting switch 23, so that the starting switch 23 is switched from the contact c-a opening/closing configuration to the C-b opening/closing configuration. When the power to the timer 32 is cut off, the capacitor 35 is discharged in synchronization with this,
The electronic timer 32 is then returned to its initial state.

The connection between the common connection point of the variable resistor 34 and the capacitor 35 and the fixed contact piece of the starting switch 23 corresponds to the return means of the present invention.

On the other hand, 37 is a smoothing capacitor connected between the DC bus 28 and the common bus 26, 38 is a surge voltage absorbing diode connected in parallel with the excitation coil 29a of the relay 29, and 39 is the collector of the transistor 31 and the common bus. 26
This is a changeover switch that is a changeover means and is a part of the electronic timer 32 connected between the two.

Next, the operation of the above configuration will be explained.

First, water is supplied into the water storage tank 8, coffee beans are accommodated in the coffee bean grinding chamber 16, and the variable resistor 3
4 to adjust the set time of the electronic timer 32 as appropriate;
Thereafter, the contacts c and a of the start switch 23 are closed, and the electronic timer 32 starts timing.

While the electronic timer 32 is in operation, the transistor 31 is turned off, so the excitation coil 29a of the relay 29 is cut off and the contact C-6 is closed, so that the motor 20 is turned off. The cutter 18 is rotated by being energized, and the coffee beans in the coffee bean grinding chamber 16 are ground.

Thereafter, when the set time of the electronic timer 32 has elapsed and the timing operation is stopped, that is, the transistor 31 is turned on, the excitation coil 29a of the relay 29 is energized via the transistor 31, and the contacts C and A are closed. As a result, the motor 20 is de-energized and grinding of coffee beans is stopped, and at the same time, the sheathed heater 10 is energized.

As a result, the sheathed heater 10 generates heat and the heating pipe 1
The water in 1 boils, and the hot water flows into hot water pipe 13 at boiling pressure.
The coffee beans are pushed up and dripped into the coffee bean grinding chamber 16,
It passes through the coffee powder and becomes coffee liquid, which is further dripped into the liquid reservoir 4 from the extraction port 40 of the case 15 and stored therein.

When the production of coffee liquid, that is, the generation of hot water as described above, is completed and the water in the water supply pipe 12 and the heating pipe 11 disappears, the temperature of the heating plate 9 suddenly rises and the thermostat 14 is automatically activated. This opens the heater 10, thereby cutting off the power to the heater 10.

Thereafter, when the start switch 23 is returned to the contact c-1) open/closed state, the electronic timer 32 is returned to its initial state and the excitation coil 29a of the relay 29 is cut off.

Also, before going to bed, water is supplied into the water storage tank 8 and coffee beans are stored in the coffee bean grinding chamber 16, and the timer switch T is set to stop clocking at the time of getting up the next morning, and then started. Contact piece C-a of switch 23
If the timer is closed, when it is time to wake up, the motor 20 and the electronic timer 32 will be energized by the action of the timer switch T, and the coffee liquid can be obtained in the same way as described above. You can enjoy hot coffee liquid.

According to the present embodiment described above, the coffee beans are ground by the cutter 18 only for the time set by the electronic timer 32. Therefore, the set time of the electronic timer 32 can be adjusted in advance to a constant value by the variable resistor 34. For example, the degree of grinding of coffee beans can always be kept constant.

Therefore, there is no risk of over- or under-grinding of the coffee beans, and coffee liquid of approximately the same concentration can be produced at all times. This prevents problems such as hot water overflowing from the case 15.

Furthermore, if the set time of the electronic timer 32 is adjusted in advance as described above, when producing coffee liquid, the simple operation of closing the contacts c and a of the start switch 23 is sufficient. It's good, and it's easy to use.

In addition, according to this embodiment, if the changeover switch 39 is closed while coffee beans are being ground, the electronic timer 32
Excitation coil 29 a of relay 29 regardless of the timing operation of
Since the coffee beans can be energized, the grinding of coffee beans can be stopped midway and hot water supply into the coffee bean grinding chamber 16 can be immediately started.

In the above embodiment, the set time of the electronic timer 32 is adjusted by the variable resistor 34, but the present invention is not limited to this. Instead of the capacitor 35, a variable capacitor serving as an adjusting means may be provided to adjust the set time. It's okay.

Further, although the relay 29 is used as the switch means, it is needless to say that the present invention is not limited to this.

As described above, the present invention includes a coffee bean grinding chamber in which a grinding body driven by a motor is disposed, and a hot water supply device for supplying hot water heated by an electric heater into the coffee bean grinding chamber to obtain coffee liquid. A coffee making machine equipped with an electronic timer that starts timing operation by operating a start switch, and an electronic timer that starts energizing the motor in conjunction with the start of the timing operation of the electronic timer, and also in conjunction with the stop of the timing operation of the electronic timer. The present invention is characterized in that a switch means is provided for starting the operation of the hot water supply device at the same time as the motor is cut off, and this makes it easy to use and prevents coffee beans from being over-ground or under-ground. There is no risk of this occurring, and excellent effects such as being able to always produce coffee liquid with approximately the same concentration can be achieved.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a vertical side view;
FIG. 2 is an electrical circuit diagram. In the figure, 3 is a drip mechanism (hot water supply device), 10 is a sheathed heater (electric heater), 16 is a coffee bean grinding chamber, 1
8 is a cutter (grinding body), 20 is a motor, 23 is a starting switch, 29 is a relay (switch means), 32 is an electronic timer, 34 is a variable resistor (adjustment means), and 39 is a changeover switch (switching means).

Claims (1)

[Scope of utility model registration request] 1. Operation of a start switch in a coffee bean grinding chamber equipped with a grinding body driven by a motor and a hot water supply device for supplying hot water heated by an electric heater into the coffee bean grinding chamber to obtain coffee liquid. an electronic timer that starts timing operation, and starts energizing the motor in conjunction with the start of timing operation of the electronic timer;
A coffee making machine further comprising a switch means for turning off the motor and starting the operation of the hot water supply device in conjunction with the stoppage of the electronic timer. 2. The coffee making machine according to claim 1, wherein the electronic timer is provided with an adjusting means for changing the set time. 3. The scope of the utility model registration claim, characterized in that the switch means includes a switching means that is operated independently of the timing operation of the electronic timer to cut off the power to the motor and start the operation of the hot water supply device. The coffee making machine according to paragraph 1. 4. The coffee making machine according to claim 1, wherein the electronic timer includes a return means that returns to the initial state in synchronization with power cutoff.