JPS59228815A - Coffee extracting apparatus - 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 extraction device that extracts hot water using the siphon effect.

(B) Prior Art Conventionally, this type of coffee brewing device completes one brewing cycle when siphoning is stopped at the suction port of the siphon pipe connected to the hot water tank.

Therefore, for the next extraction, it was necessary to supply water from the level of the suction port of the siphon tube to the level at which the siphon phenomenon started, and there was a long loss time from the extraction command until hot water actually came out of the siphon tube.

(c) Purpose of the Invention The purpose of the present invention is to reduce the loss time from the extraction command to the extraction of hot water, and to quickly perform the extraction operation.

B) Structure of the Invention The present invention is a coffee extraction device that extracts hot water using the siphon effect, in which after siphoning is stopped at the level of the suction port of the siphon tube, the next extraction is performed above the suction port of the siphon tube. The structure is designed to supply water for the following purposes.

(E) Embodiment FIG. 1 shows the internal structure of the coffee brewing device of the present invention, in which a water storage tank (2) whose top surface is open is disposed at the upper part of the main body (1), and a water storage tank (2) whose top surface is open is provided below. heating heater (3),
A hot water tank (6) is provided with a hot water temperature control thermostat (4) for controlling the continuous operation of the heater (3), and an appropriate temperature thermostand (5) attached to the upper outer wall surface. One end of the water storage tank (2) is connected to the water supply, and the other end of the water supply pipe (8) equipped with a water supply valve (7) is exposed to the lower part of the water storage tank (2) and the hot water tank (6). )
The bottom of the tank is connected in communication with a water extraction pipe (10) with a water extraction valve (9) interposed therebetween. Further, in the upper part of the hot water supply tank (6), there is a siphon pipe 01 with a suction port (11A) located at the upper part of the hot water supply tank (6) and a spray head 0 attached to the other end located below the suction port (IIA). ) are connected.

The water storage tank (2) is provided with a first water level detection device OJ that controls the water supply valve (force) so as to maintain the water level of the tank (2) at a predetermined water level. The detection device αJ employs a float system that opens and closes a reed switch (13B, which will be described later) based on the ups and downs of a float (13A).In addition, the hot water tank (6) has an upper end located higher than the top of the siphon pipe 0υ. The protruding lower end is the tank (6
) is connected to the cylindrical pipe 0 → extending downward, and the cylindrical pipe 04
) is provided with a second water level detection device 09 that detects the water level of the hot water tank (6) and controls the water extraction valve (9). This water level detection device α9 is a first water level detection device (1
It has the same structure as 31, but it detects two levels, upper and lower, so as to control the opening and closing of the upper reed switch (15B) and lower reed switch (15C), which will be described later, based on the rise and fall of the float (15A). The upper level is set to a level at which the siphon phenomenon by the siphon tube 01) is reliably started, and the lower level is set below the upper level and above the suction port (11A) of the siphon tube 01).

Furthermore, as another configuration, the spray head (12
A chamber 0'7) containing coffee powder 06) is provided oppositely below the body (1) and can be freely drawn out.
An extraction switch 08) is attached to the upper front of the machine, and a power switch 09 is attached to the lower front of the machine. In addition, a filter (2 (I) and an opening/closing lid (21) are arranged opposite to the upper part of the water storage tank (2) to enable manual water supply to the water storage tank (2). Install the water storage tank (2) upright in the specified position (2 is the hot water tank (6)
This is the overflow pipe for the air bleed and water storage tank (2). (23) is a manual drain valve for draining hot water from the hot water tank (6).

Next, the electric circuit of the present invention will be explained based on FIG. (
[→ is the power switch, the automatic return type extraction switch, (4) is the hot water temperature control thermostat, (5) is the appropriate temperature thermostat, and Q4) is the hot water temperature in the hot water tank (6) that can be extracted. (7) is the water supply valve; (9) is the water extraction valve; (3) is the heater; (13B) is the first
The reed switch included in the water level detection device (13), (
15B) and (15C) are the second water level detection device (1
The upper reed switch and the lower reed switch (25) included in 5) are full water lamps that are lit when the first water level detection device θ3) detects a predetermined water level in the water storage tank (2). (26) is a first relay, which has a normally open first relay contact (26A) and a normally closed first relay contact (26B). (27) is a magnetic relay, and a normally open magnetic switch (27A) is installed at both ends of the heater (3).
and (27B). A second relay (28) has a normally open second relay contact (28A), a normally closed second relay contact (28B), and a self-holding contact (28C). 12
9) is the third relay, normally closed third relay contact (29A)
has.

(G) is the fourth relay, the normally open fourth relay contact (30A
), a normally closed fourth relay contact (30B), and a self-holding contact (30C). 01) is the second water level detection device (I
5) is a timer that starts when the third level is detected, and has a timer contact (31A) that opens when the time period for ensuring the completion of the extraction operation of the siphon tube aυ has elapsed.

Next, the present invention based on the above configuration will be explained in detail.

First, when the power switch θ■ is closed, the first relay (26) is energized because the lower reed switch (15C) is closed, and its contact switches to the normally open first relay contact (26A). Also, since the reed switch (13B) is open at this time, the third relay CI! 9) The third relay contact (29A), which is de-energized and normally closed, is in a closed circuit state. Therefore, open the water supply valve (7) and water extraction valve (9) to open the water supply pipe (
8) to the water storage tank (2), and then the water storage tank (2).
Water is supplied from 2) to the hot water tank (6) via the water extraction pipe 00). At this time, from the water storage tank (2) to the hot water tank (6)
The water flow to the water storage tank (2) is due to natural fall.
The amount of water supplied to the water tank (2) is increasing, and water is flowing to the hot water tank (6), while the water level in the water storage tank (2) is rising (.

When the water level of the water storage tank (2) reaches a predetermined water level, the first water level detection device 03) detects this and closes the IJ-do switch (13B), thereby causing the third relay e
9) to open the normally closed third relay contact (29A). Therefore, the water supply valve (7) is temporarily closed, but since the water extraction valve (9) is open, the water level in the water storage tank (2) decreases, and the reed switch (13B) opens again, causing the third relay to open. The wire is de-energized and the third relay contact (29A) is always open.
), the water supply valve (7) is opened again.

By repeating this water supply operation, the hot water tank (6)
When water is supplied to the lower level, the second water level detection device (
15) detects this and turns on the lower reed switch (15C).
) is opened. Then, the excitation of the first relay (26) is released and its contact switches to the normally closed first relay contact (26B), which closes the water supply valve (power and water extraction valve (9)) and opens the water storage tank (2) and hot water supply. Stop the water supply to the tank (6).

On the other hand, the magnetic relay (2η) is energized via the normally open first relay contact (26B), and the magnetic switches (27A) and (27B) are closed to heat the heater (3).
) to heat the water stored in the hot water tank (6). The control thermostand (4) controls the energization of the heater (3), and when the appropriate temperature thermostand (5) senses a temperature suitable for extraction, the thermostat (5) operates to turn on the appropriate temperature lamp C24). lights up to notify you that hot water extraction is possible.

In this state, if you press the extraction switch (18), the second
The relay (28) is energized and switches its contact to the normally open second relay contact (28A), and the second relay is self-held via the self-holding contact (28C) even if the extraction switch 0 barrel returns. Ru. As a result, the water extraction valve (9) opens and the water in the water storage tank (2) flows into the water extraction pipe (Ill or the hot water tank (6)), and the water in the water supply valve (during this period, the water level is adjusted based on the first water level detection device (13). Water storage tank (2) opened and closed as appropriate
This is to maintain the water level at a predetermined level.

Then, when the level of hot water in the hot water tank (6) rises and reaches the upper level, the siphon phenomenon starts, and the hot water in the hot water tank (6) passes through the siphon pipe (11) to the spray nozzle 02). Coffee powder (
! 6) to extract coffee liquid. On the other hand, at the timing when the siphon phenomenon starts, the upper relay (15B) closes, so the fourth relay ~00) is energized and its contact is switched to the normally open contact (30A), and the fourth
The relay (301) is self-held via the self-holding contact ('30C). This closes the water extraction valve (9) and stops the water supply from the water storage tank (2) to the hot water tank (6).
,, simultaneously starts the timer (31). This timer (311) is used to prevent the extraction valve (9) from opening while hot water is being extracted from the knife-on tube (11) by the siphon effect.
This is to keep the sword in an excited state.

As hot water is extracted from the siphon pipe Ql), the level of hot water in the hot water tank (6) gradually decreases, and in the middle of this process, the lower reed switch (15C) becomes closed. Furthermore, when the level of hot water decreases from the suction port (IIA) of the siphon pipe 00, air flows in from the suction port (11A) to cut off the siphon phenomenon and complete the extraction of hot water.

In this way, from the siphon pipe 01) to the hot water tank (6)
When the extraction operation of the hot water in the tank is completed, the timer 01) generates a time amplifier and the timer contact (31A) opens, thereby releasing the self-holding of the second relay (28) and switching the contact to the normally closed second relay. Switching to the relay contact (28B) and opening the self-holding contact (28C). At the same time, the fourth
The self-holding of the relay (30) is released and its contact is switched to the normally closed fourth relay contact (30B), and the self-holding contact (30C) is opened. This fourth relay (30)
By switching the contact, the power supply to the timer 01) is cut off, and the timer contact (31A) is normally closed.

When the timer contact (31A) closes, the level of hot water in the hot water tank (6) is approximately at the level of the suction port (1tA) of the siphon pipe (11), which is lower than the lower level, so the lower reed switch (15C) is closed. is closed.

Therefore, the first relay (26) is energized and its contact switches to the normally open first relay contact (26A), and the water supply valve (7)
Open the water extraction valve (9) to supply water from the water supply pipe (8) to the water storage tank (2), and then from the water storage tank (2) to the water extraction pipe (I
Water is supplied to the hot water tank (6) via the hot water supply tank (6). When the water level in the hot water tank (6) rises to the lower level, the lower reed switch (15C) is opened to de-energize the first relay (2[i) and its contact is connected to the normally closed first relay contact ( 26B) to complete all operations.

As described above, if the extraction operation is performed from the F level to the upper level, the time from pressing the extraction switch 0 to the start of the siphon phenomenon can be shortened. Note that the lower level is set in anticipation of the amount of increase in thickness when the water in the hot water tank (6) is heated from room temperature and expands, so the closer it is to the upper level, the more hot water can be extracted after pressing the extraction switch (18). The time it takes to start is shortened. In addition, although the present invention supplies water from the water storage tank (2) to the hot water tank (6), it is also possible to implement the water storage tank (2) and the water supply valve (by removing the force and connecting the water extraction valve (9) directly to the water supply). be.

(F) Effects of the Invention In the present invention, after the hot water extraction operation using the siphon tube is surely completed, water is supplied to the hot water tank for the next cycle of extraction operation, so from the extraction command until the hot water extraction starts. Loss time is significantly reduced, and extraction operations can be carried out quickly. In addition, for users, it can alleviate the anxiety of not being able to extract boiling water even after pressing the brew switch.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing the internal structure of the coffee brewing apparatus of the present invention, and FIG. 2 is an electric circuit diagram of the present invention. (6)... Hot water tank, (9)... Water extraction valve, 0
1)...Siphon tube, 05)...Second water level detection device, (15B)...Upper reed switch,
(15C)...lower reed switch, 61)・
...Timer, (31A) ...Timer contact. Figure 1 19/a Figure 2

Claims (1)

[Claims] 1. In a coffee brewing device that extracts hot water in a hot water tank heated by a heating device from a siphon pipe connected to the tank using a siphon pipe fruit, the hot water tank has at least an upper layer where the Ifon phenomenon starts. a water level detection device for detecting a water level and a lower level below the level above the suction port of the siphon pipe; an extraction circuit that closes an extraction valve to induce a siphon phenomenon when water is supplied to the level;
a timer circuit that starts when the water level detection device detects an upper level and controls the water extraction valve to close at least until the extraction of hot water by the siphon is completed; and a timer circuit that controls the water extraction valve based on the time up of the timer circuit. A coffee brewing device characterized by forming a water supply circuit that opens and closes a water extraction valve when water is supplied to the lower level.