JPS61244312A - Coffee brewer - 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 (a) Field of Industrial Application The present invention relates to a coffee boiler that generates hot water and supplies the hot water to coffee grounds to obtain coffee liquid.

(b) Conventional technology A conventional coffee boiler is, for example, the
As shown in Publication No. 2820, the end of drip is notified when the thermostat detects the rapid temperature rise of the heater, which has no longer passed through the pipe and as a result no longer exchanges heat. At the same time, a buzzer or other notification means was used to notify the end of the drip.

However, if the configuration is such that even if the power to the heater is cut off and the notification means is activated, there is still a small amount of hot water remaining in the coffee grounds and coffee liquid is being extracted, so the notification means is activated. If you immediately lift the decanter that receives the coffee liquid even after receiving the notification, the coffee liquid that is being extracted will not be obtained and will be wasted.In addition, since the decanter will be removed, the coffee liquid that is being extracted will drop and stain the main unit. was there.

(c) Problems to be Solved by the Invention Therefore, an object of the present invention is to provide a coffee boiler that can notify the user of the completion of the extraction operation of coffee liquid after the extraction operation is completely completed.

(d) Means for Solving the Problems The present invention provides a hot water supply means that generates hot water by energizing a heater and supplies this hot water into a case containing coffee grounds, and a water supply means that detects a temperature rise due to the end of dripping. temperature detecting means for cutting off energization to the heater; end notifying means for notifying the end of drip end temperature with a buzzer or lamp in response to the operation of detecting the drip end temperature of the temperature detecting means; The present invention is characterized by comprising notification control means for operating the completion notification means with a delay from the initial opening operation.

(E) Even if the power supply to the heater is cut off due to the end of the working drip, the notification means does not issue a notification until the extraction of coffee liquid from the coffee grounds is completely completed.

(f) Example (1) is a coffee boiler body equipped with a mill device 1 (2), which includes a base (3), a water tank (4) that stores water, and the mill device (2). It consists of a built-in storage section (5), a decanter (6) for receiving coffee liquid, etc. The top opening of the decanter (6) has a notch (
7) is provided. The base (3
) is provided with a heater (9), one end of which is connected to the bottom of the water tank (4) via a check valve (not shown), and the middle part is wrapped around the heater (9) for heat exchange. A hot water supply pipe (10) is provided whose end communicates with the mill device (2). The water tank (4), hot water supply pipe (10), heater (9), etc. constitute a hot water supply means (11) for generating hot water. The mill device (2) includes a lower case (14) in which a motor (12) and a filter (13) are installed to store coffee powder, and a water supply pipe (10) that is connected to the lower case (14). It consists of a diffusion plate (15) that diffuses hot water, an upper case (18) that has a cutter (17) that rotates by being connected to the drive shaft (16) of the motor (12), and that grinds coffee beans. ing.

That is, the coffee beans are crushed by the cutter (17) in the upper case (18), and coffee powder is passed through the through hole (19) formed on the bottom of the upper case (18) to the lower case ( 14) in the filter (13), and then the hot water generated by the heater (9) is passed through the hot water pipe (1
0) and a diffusion plate (15) onto the coffee powder, and the coffee liquid is poured into the decanter (6) from the spout (20).
). (21) is the hinge part (22)
This is an opening/closing lid that opens and closes the top openings of the water tank (4) and the upper case (18) through the lid.

FIGS. 3 and 4 show schematic block diagrams, and will be described in detail below.

The AC 100v power supply (30) is lowered through the transformer (31), and then the yX Kou 2 is supplied to the first constant voltage DC power supply circuit (32).
It constitutes a 4V power source and applies 24V AC to a display (33) made of a fluorescent display tube.

This first constant voltage DC power supply circuit (32) includes a heater circuit (
a heater drive relay circuit (35) that drives the motor circuit (34); and a motor drive relay circuit (35) that drives the motor circuit (36).
7) and the end notification means (39) that drives the buzzer (38) or lamp are disconnected. (40) is a heater relay that opens and closes a heater relay contact (41) connected in series with the heater (9). (42) is a motor relay that opens and closes a motor relay contact (43) connected in series with the motor (12). (44) is a second constant voltage DC source circuit that further lowers the voltage from the first constant voltage DC power supply circuit (32) to 9V to drive a microcomputer (45) (hereinafter referred to as microcomputer). (
46) indicates the time when the microcomputer (45) is output, the heater (9), the motor (12) and the buzzer (
38) is a power frequency synchronization signal circuit that oscillates a synchronization signal that serves as a reference for drive time. (47) is the AC power supply (
This is an initial circuit that momentarily generates a pulse only when the microcomputer (45) is turned on to put the microcomputer (45) into an initial setting state. (48) is an oscillation circuit that drives the microcomputer (45) based on time.

(49) is a temperature detection means consisting of an automatic reset type thermostat (50), which is attached to the bottom of the heater (9) for heat exchange, and detects the end temperature of the drip, and then opens and closes to maintain heat. The operation is repeated to control the energization of the heater (9). (51)
is an operation panel disposed at a suitable position on the side of the main body (1), which is provided with the display (33) at the top and has a time setting start switch (52) for displaying and setting the current time on the display (33). ), a time setting switch (53),
a minute setting switch (54), a cup number selection switch (55) for selecting a desired number of cups for the number of people and displaying it on the display (33), and a start switch (5
6) and a stop switch (57) for stopping drip or heat retention midway through. (58) is a heater relay driver having a first transistor (59) etc. that is turned on based on an instruction from the microcomputer (45), and controls the heater drive relay circuit (35). 60) is operated based on instructions from the microcomputer (45).
The motor drive relay circuit (37) is controlled by a motor relay driver having a second transistor (61) and the like.

Next, to explain the microcomputer (45), (65)
) is a current time setting means (66) for displaying the current time on the display (33) in response to the operation of the time setting start switch (52), the hour setting switch (53), and the minute setting switch (54); ) is the cup number selection switch (55)
11 while memorizing the number of cups in response to the action of
i1 Cup number setting means (67) digitally displays the number of cups on the display (33); (67) drives the motor (12) according to the number of cups stored in the cup number setting means (66); A motor drive d9 constant means for automatically setting the time, (68) a motor control means for rotating the motor (12) for the time set by the motor drive setting means (67), and (69) the cup number setting means. Means (6
Heater drive setting means for automatically setting the initial drip time and the unevenness time according to the number of cups stored in step 6);
70) enables the heater (9) to be energized for the initial drip time in accordance with the time set by the heater drive setting means (69), and for the subsequent uneven time to energize the heater (9).
), and thereafter, the heater control means (71) is configured to cut off the continuous energization to the heater (9) and then enable the continuous energization to the heater (9). A drip end detection means (72) for cutting off the power supply to the heater (9) responds to the temperature detection means (49) detecting the drip end temperature, after which the coffee liquid to be filtered through the coffee powder is removed from the bottom. Notification control means (73) operates the end notification means (39) after a delay of about 1 minute to ensure complete extraction without remaining in the case (14); This is a heat retention control means that controls energization to the heater (9) in response to the temperature detection means (49) in order to continue the heating.

In addition, in the diagram shown in FIG. 5, the motor drive time (seconds), initial drip time (seconds), and dripping time (seconds) are set in advance according to the number of cups displayed on the display (33). This is an explanatory diagram that should be stored in the motor drive setting means (67) and heater drive setting means (69) of the microcomputer (45), and the amount of water and coffee beans are selected by the user according to the desired number of cups. be.

To explain the operation of this configuration, first, press the time setting start switch (52), hour setting switch (53), and minute setting switch (54), and then press the microcomputer (45).
The current time is set to be displayed on the display (33) via the current time setting means (65).

Next, if you want to make coffee liquid for 7 people, for example, store water in the water tank (4) up to the 7th scale of the water level line (not shown) displayed on the side of the water tank (4). It will hold about 1065cc. ), upper case (18
), put coffee beans for 7 people (approx.
3), display 174, and then press the start switch (56).

That is, r7. is displayed on the display (33). By displaying "7. Cup" in the cup number setting means (66), the motor drive setting means (67) automatically sets "1161 seconds according to the motor drive time of 17. Cup". Then, press the start switch (5
The motor control means (68) is activated by the pressing operation in step 6).
Activate based on 161 seconds and turn on motor relay driver cross 0) → turn on motor drive relay circuit (37)
Turn on each of the 4 motor 9 circuits (36), thereby turning on the motor relay contact (43) to rotate the motor (12) for 164 seconds, and in conjunction with this operation, drive the cutter (17) to make coffee. It is used to crush beans.

Further, by displaying "7" on the display (33), when the number of cups is stored in the cup number setting means (66), the heater drive setting means (66) simultaneously performs the above operation.
69), the initial drip time corresponding to cup "7" is "644 seconds" and the drip time of 1404 seconds is automatically set, and the motor (12) is
When the rotation drive for 16 seconds is completed, the motor relay driver (60) is turned off, and in conjunction with this, the heater control means (70) is operated, and the heater relay driver (58) is first turned on → the heater drive relay circuit (35
) turns on → turns on the heater circuit (34), which turns on the heater relay contact (43) and turns on the heater (9).
is energized for 641 seconds to generate hot water, which is dripped onto the coffee powder accumulated in the filter (13) by the rotation of the cutter (17).
).

Then, when 1"64" seconds have elapsed, the heater relay driver (58) is turned off by the heater control means (70).
As a result, the heater (9) is cut off for 140j seconds. The period during which the heater (9) is turned off for 40 seconds is called ``murashi'', and the coffee powder is swelled with hot water supplied to the coffee grounds for 64 seconds.

Next, when the above-mentioned r40'' second murashi period ends,
The heater control means (7o) turns on the heater relay driver (58) again, and thereafter the heater (9) is continuously energized to generate hot water using the normal drip method.

The thermostat (50) of the temperature detection means (49) detects when the water in the water tank (4) has almost completely disappeared and the drip operation has ended and the temperature of the heater (9) has suddenly increased.
is detected, and based on this detection signal, the drip end detection means (71) is operated and the heater relay driver (5
8) is turned off to cut off the power supply to the heater (9).

After the power is cut off to the heater (9), the notification control means (
72) operates and the buzzer (38) of the end notification means (39) is activated.
) to notify the user that the coffee liquid has been extracted.

Thereafter, the heat retention control means (73) controls the temperature detection means (49).
) Based on the 0N-OFF operation of the heater relay dry/< - (58) is turned 0N-OFF and the heater (9)
The device controls the energization of the heater and shifts to heat retention.

(G) Effects of the Invention Since the present invention is constructed as described above, even if the water in the water tank runs out, the dripping process is completed, and the power supply to the heater is completely cut off, there is no residual water left in the coffee grounds. The notification by the notification means is delayed until the coffee liquid is completely filtered and extracted with boiling water. Therefore, unlike the conventional method, the notification means can be operated even when the extraction of coffee liquid is not completely finished, and the coffee liquid being extracted can be completely extracted. This eliminates the problem of not being able to get enough coffee, or of lifting the decanter and staining the main body with dripping coffee liquid.

[Brief explanation of the drawing]

Fig. 1 is a front view of a coffee boiler equipped with the mill device of the present invention, Fig. 2 is a schematic sectional view thereof, Fig. 3 is a block circuit diagram showing the operation, Fig. 4 is a block diagram of a microcomputer, and Fig. 4 is a block diagram of the microcomputer. FIG. 5 is an explanatory diagram showing various required capacities depending on the number of cups. (9)...Heater, (14)...Case, (49>
... Temperature detection means, (39) ... End notification means, (
72)...Notification control means.

Claims (1)

[Claims] (1) A hot water supply means that generates hot water by energizing a heater and supplies this hot water into a case containing coffee grounds;
Temperature detection means that detects a temperature rise due to the end of dripping and cuts off the power supply to the heater, and an end notification that notifies the end of dripping with a buzzer, lamp, etc. in response to the operation of detecting the end temperature of dripping by the temperature sensing means. and notification control means for operating the completion notification means with a delay from the initial opening operation of the temperature detection means.