JPS61119227A - Coffee extractor - 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 brewing device that extracts hot water using the siphon effect.

(b) Conventional technology The conventional coffee brewing device disclosed in Japanese Utility Model Application Publication No. 56-54031 closes the water supply valve when the water level detection device detects the upper limit water level of the hot water tank, and at this timing, the siphon effect occurs. I was trying to get it to start. According to such a conventional extraction control force method, if the timing at which the water level detection device detects the upper limit water level, that is, the position of the water level switch is slightly incorrect, the siphon will not start, or even if the siphon starts, the water supply valve will not open. The advanced installation of the switch required precision, which could lead to fatal defects such as failure to close.

In addition, as a technology to variably adjust the amount of extraction,
The structure described in Japanese Patent No. 4031 has an adjustment pipe connected to the tip of the extraction pipe on the suction side in an airtight manner and movable in the vertical direction. Originally, liquid extraction using siphon action maintains the flow with a small water pressure difference, so the shape of the pipe flow path, such as changes in length and unevenness, creates resistance to flow. If the material is a fluid, even the slightest unevenness tends to generate bubbles, which affect the siphon action and interrupt the flow during extraction.

The adjustment method according to the prior art described above has the disadvantage that stable siphon operation cannot be ensured because these factors that adversely affect the siphon operation cannot be avoided.

(c) Problems to be Solved by the Invention The present invention addresses the drawbacks of the prior art and provides that the sophisticated mounting of the switch of the water level detection device will initiate the siphon effect reliably without the need for precision, as desired. ) □1 piece 92
,7□□,T□Yuwa, Yes, Ah, we provide a coffee brewing device that can not only finely adjust the amount of oil to be fried, but also change the amount of extraction step by step with a simple switch operation.

B) Means for Solving the Problems The present invention is a coffee brewing device that extracts hot water in a hot water supply tank heated by a heating device from a siphon pipe connected to the tank using the siphon effect, a movable adjustment pipe having one end connected midway to the siphon pipe and the other end opening into the hot water tank; an operating device for vertically moving the opening position of the other end of the adjustment pipe; a water extraction valve that opens to supply water to the bottom of the hot water tank; a water level detection device that detects a water level in the hot water tank that rises when the water extraction valve opens; and a level at which the detection device starts the siphon effect. A plurality of delay devices having different delay times that operate when an upper level of a slightly lower hot water tank is detected, and a selection switch that arbitrarily selects any one of the delay devices are provided, and the selection switch is operated by the selection switch. 7), during the delay time by the selected delay device.

This coffee brewing device starts an on effect and closes the water extraction valve after a delay time has elapsed.

(e) Effect In the above configuration, when the water extraction valve is opened in response to a hot water supply command, water is supplied to the bottom of the hot water tank and the water level in the hot water tank rises. When the water level in the hot water tank reaches an upper level slightly below the level that initiates the siphon effect, the water level detection device detects this and activates the delay device selected by the selection switch. During this time, the extraction valve remains open, so the water level in the hot water tank finally reaches the level at which the siphon effect starts, and the hot water in the hot water tank is extracted from the siphon pipe. When the delay time set by the delay device has elapsed, the water extraction valve closes and water supply to the hot water tank is stopped, and thereafter, hot water from the hot water tank is extracted from the siphon pipe until the siphon is turned off.

Furthermore, the time until the water extraction valve closes is varied by selecting the delay device using the selection switch, and thereby the amount of hot water extracted is varied in stages.

Furthermore, by moving the opening position of the other end of the adjusting tube up and down using the operating device, the position at which the siphon is cut changes, thereby making it possible to minutely adjust the amount of hot water extracted.

(f) Embodiment Figure 1 shows the internal structure of the coffee brewing device of the present invention.
A heater (3) is provided below the heater (3).
A hot water tank (6) is provided with a built-in hot water temperature control thermostat (4) for controlling the energization of the heater (3), and a suitable temperature thermostat (5) is installed on the upper outer wall surface. One end of the water storage tank (2) is connected to a water pipe, and the other end of a water supply pipe (8) with a water supply valve (7) interposed in the middle faces the water storage tank (2), and the lower part of the water storage tank (2) and the hot water tank (6) The bottom of the pipe is connected to a water extraction pipe CIQK with a water extraction valve (9) interposed therebetween. There is an inlet (IIA) at the top of the hot water tank (6).
is opened at the top of the hot water tank (6), and the suction port (IIA
) A siphon tube aυ with a spray head α4 attached is connected to the other end located at the lower blade.

A regulating pipe Qυ is connected in the middle of this siphon pipe (11), and the other end of the regulating pipe (21) has an inlet port (21A).
) opens downward in the hot water tank (6). The adjustment tube Qυ uses a tube with a smaller diameter than the siphon tube aυ, and has a loop shape to provide vertical movement. This adjustment tube (211) is moved in the vertical direction by an operating device (to).

As shown in detail in Fig. 2, the operating device @ has an L-shaped support fitting (end) welded near the suction port (21A) of the adjustment pipe (21), and rotates with respect to this support fitting (end). Connect the operating rod (to) as possible. The upper part of the operating rod (goods) is a screw part (34A)
This screw 5 (34A) is formed in the hot water tank (6).
The guide tube extends upward by being screwed into a nut fixed to the upper end of the guide tube protruding from the guide tube. Furthermore, a groove (to) into which the driver (9) fits is formed on the upper end surface of the operation rod (to), and the main body (1) is located on an extension of the operation rod (to).
An insertion opening (to) for a screwdriver (9) is formed in the top plate.

Further, the water storage tank (2) K is provided with a first water level detection device q3 that controls opening and closing of the water supply valve (7) so as to maintain the water level of the tank (2) at a predetermined water level. The detection device 0 employs a float system in which a reed switch (13B), which will be described later, is opened and closed based on the ups and downs of a float (13A). On the other hand, the hot water tank (6) K has an upper end that protrudes to a higher position than the top of the siphon pipe (11), and a lower end that extends inward of the hot water tank (6) and is an open cylindrical pipe I.
are connected. Inside this cylindrical pipe side is a hot water tank (
A second water level detection device (15) is installed to detect the water level of the float (15A). Based on this, the opening and closing of the upper reed switch (15B) and lower reed switch (15C), which will be described later, is controlled.
It detects two levels, upper and lower, of which the upper reed switch (15B) is connected to the siphon tube αυ.
It is installed slightly below the level at which the siphon effect begins.

As another configuration, a chamber housing η in which a coffee powder head is set is provided opposite to the lower part of the spray head housing 2, and can be freely pulled out, and a hot water supply command switch 8 and a hot water supply command switch 8 are provided on the front of the upper part of the main body (11). Selector switch (I
I is attached, and a power switch (to) is attached to the lower front. Further, an opening/closing lid r21) is disposed above and facing the water storage tank (2) to enable manual water supply to the water storage tank (2). Further, the device protruding from the hot water tank (6) to a predetermined position of the water storage tank (2) is an upright pipe that serves both for air bleeding from the hot water tank (6) and for overflow from the water storage tank (2). - 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. (
3) is the heating heater, (4) is the hot water temperature control thermostat, (51 is the appropriate temperature thermostat, (
7) is the water supply valve, (9) is the water extraction valve, and (13B) is the reed switch that constitutes the first water level detection device;
(15B) and (15C) are the second water level detection device α
9 is the upper reed switch and lower reed switch, α8 is the automatic return type hot water switch, 0 is the selection switch, and normal quantity contacts (19A1) and (19
A2) and increasing contacts (19B1) and (19B2'). ■ is the power switch mentioned above, (Foundation) is the hot water tank (
6) An appropriate temperature lamp that indicates that the water temperature in the tank is at an appropriate temperature for extraction. The full water lamp, @, is the first relay, which has a normally closed first relay contact (26A) and a normally open first relay contact (26B). @ is a magnetic relay, with normally open magnetic switches (27A) and (27) on both sides of the heater (3).
B). (to) is the second relay, which is normally closed! 217
Relay contact (28A) and normally open second relay contact (28B)
and a self-holding contact (28C).

The wire is the third relay and has a normally closed third relay contact (29A). (to) is a timer, which has a timer contact (30A) that opens when a predetermined time has elapsed since energization. The plurality of delay devices are composed of a first delay relay Gυ and a second delay relay (to) having a longer delay time than the relay Gυ, and the first delay relay Gυ has a normally closed first delay relay contact ( 31A) and the normally open first delay relay contact (31B)
and a self-holding contact (31C), and the second delay relay G2 has a normally closed second delay relay contact (32A), a normally open second delay relay contact (32B), and a self-holding contact (32C).
)have. Note that the number of delay relays is not limited to the embodiment.

Next, the operation will be explained based on the above configuration. First, when the power switch ■ is closed, the lower reed switch (15C)
is closed, the first relay (26) is energized and its contact switches to the normally open first relay contact (26B),
Further, at this time, since the reed switch (13B) is open, the third relay (to) is not excited, and the normally closed third relay contact (29A) is in a closed state.

Therefore, the water supply valve (7) and the water extraction valve (9) open to supply water from the water supply pipe (8) to the water storage tank (2), and this water passes from the water storage tank (2) through the water extraction pipe (11) to the hot water tank ( 6)
is supplied with water. At this time, since the flow of water from the water storage tank (2) to the hot water tank (6) is a natural fall, the amount of water supplied to the water storage tank (2) increases, and while water is being supplied to the hot water tank (6), the water tank The water level in (2) will rise.

When the water level of the water storage tank (2) reaches a predetermined water level, the first water level detection device αJ detects this and closes the reed switch (13A), thereby causing the third water level detection device αJ to close the reed switch (13A).
Sea□□□ is energized and is normally closed! 31J relay contact (2
9A) is opened. Therefore, the water supply valve (7) is temporarily closed, but since the water extraction valve (9) is open, the water storage tank (
2) water level decreases, the reed switch (13B) opens again and de-energizes the 3rd relay (to), and the normally closed 3rd relay
The water supply valve (7) is opened again to close the relay contact (29A). When water is supplied to the lower level of the hot water tank (6) by repeating such water supply operation, the second water level detection device αS detects this and opens the lower reed switch (15C). As a result, the first relay (to)
is de-energized and its contact becomes the normally closed first relay contact (
26A) K switching, water supply valve (7) and water extraction valve (9)
The valve is closed to stop water supply to the water storage tank (2) and hot water tank (6).

When water is supplied to the lower level of the hot water tank (6) through the water supply operation as described above, the magnetic relay (5) is energized to close the magnetic switches (27A) and (27B), and the heater (3) is energized. to heat the water supplied to the hot water tank (6). This allows the hot water tank (
6) When the temperature of the hot water inside rises to an appropriate temperature for extraction, the appropriate temperature thermostat (5) will work and light the appropriate temperature lamp (goods) to notify you that hot water can be extracted! Ru.

In this state, if you press the hot water supply command switch a8, the second
When the relay (To) is energized and its contact is switched to the normally open second relay contact (28B) K, the Kg21J relay (To) remains the self-holding contact (28C) even if the hot water supply command switch α mallet returns.
). This allows the water extraction valve (9
) opens and the water in the water storage tank (2) flows into the hot water tank (6) from the extraction pipe a. Meanwhile, during this time, the water supply valve (7) is opened and closed as appropriate by the first water level detection device C13 to maintain the water level in the water storage tank (2) at a predetermined level.

When the hot water level in the hot water tank (6) rises and reaches the upper level, the upper reed switch (15B) closes, and at this time, the selection switch 9 closes the normal quantity contacts (19A1) and (19A2). If selected,
The first delay relay C31) is energized.

Furthermore, when water is supplied to the hot water supply tank (6), the level at which siphoning is started is finally reached, and the hot water in the hot water supply tank (6) passes through the siphon pipe α1) and the adjustment pipe (2I) and is sent from the spray head α2 to the chamber σD. It is sprinkled on the coffee powder side of the inside and starts extracting the coffee liquid. And the first
When the delay time caused by the delay relay c31) has elapsed, the contact switches to the normally open first delay relay contact (31B), and the relay Gυ is self-held via the self-holding contact (31C). As a result, the water extraction valve (9) closes, stopping the water supply operation from the water storage tank (2) to the hot water tank (6), and simultaneously starts the timer (to).

This timer (3) acts so as not to release the excitation of the second relay @ and the first delay relay Gυ until the siphon ends.

Therefore, when the suction port (IIA) of the siphon pipe αD is located above the suction port (21A) of the regulating pipe Qυ, hot water is extracted and the level of hot water in the hot water supply tank (6) becomes equal to that of the siphon pipe (11). When it falls below the inlet (IIA), the inlet (IIA)
Air enters from IIA), severing the siphon effect and ending hot water extraction.

After hot water has been extracted from the hot water tank (6) as described above, the timer times up and the timer contact (30
A) opens, and K releases the self-holding of the second relay and switches to its normally closed second relay contact (28A), and the self-holding contact (28C) also opens to normal. At the same time, the self-holding of the first delay relay Clυ is released and its contact is normally closed.
When switched to , the common self-holding contact (31C) also opens to normal. By switching the contact of the delay relay Gυ, the power supply to the timer (2) is cut off, and the timer contact (30A) returns to normal.

When the timer contact (30A) is closed, the lower reed switch (15C) is closed because the hot water level in the hot water tank (6) is below the lower level, and the first relay (to) is energized. The contact switches to the normally open @11 relay contact (26B), and the water supply valve (7) and water extraction valve (9)
Open and supply water from the water supply pipe (8) to the water storage tank (2),
Further, water is supplied from the water storage tank (2) to the hot water tank (6) through the extraction pipe αω. When the water level in the hot water tank (6) rises to the lower level, the lower reed switch (15)
C) is opened to release the excitation of the first relay (to), and the contact is switched to the normally closed first relay contact (26B) to complete all operations and enter a standby state for the next extraction.

The above explanation is about the normal amount of hot water extraction operation, and next, the extraction operation when increasing the extraction amount step by step will be explained. In this case, use the selection switch α9 to contact the temperature increase contact (19B1).
) and (19B2), the extraction operation is completely the same as described above.To explain only the main operation, when the hot water supply command switch (1υ) is pressed, the water extraction valve (9) opens and the water storage tank (2) is opened. Water is supplied from the hot water supply tank (6) to the hot water supply tank (6).When the hot water level in the hot water supply tank (6) reaches the upper level, the upper reed switch (15B) is closed, so the second delay relay is energized at this time. .Furthermore, the hot water tank (
6), the level at which the siphon effect starts is finally reached, and the hot water in the hot water supply tank (6) passes through the siphon pipe (11J and adjustment pipe C21) to the spray head α.
Extracted from 4.

When the delay time caused by the second delay relay C3aK has elapsed, its contact becomes the normally open second delay relay contact (32B).
), and the relay (c) also switches to the self-holding contact (3).
2C). This trap is better than a water extraction valve (
9) closes to stop the water supply operation from the water storage tank (2) to the hot water tank (6).

Here, since the delay time of the second delay relay (3) is longer than the delay time of the first delay relay 6υ, the water extraction valve (9) closes after the upper reed switch (15B) closes. The amount of water extracted increases by the amount of water that has flowed into the hot water tank (6) during the time difference between the two delay times.

Next, another method of varying the amount of extraction is conveniently used when finely adjusting the amount of hot water extracted.

In this case, from the insertion slot C31 to the driver C3? ) is inserted and the operating rod (b) is rotated to raise it, the V @ straight pipe QI) follows this and raises the position of the suction port (21A).

The suction port (21A) of this adjustment pipe Qυ is the siphon pipe αυ
In the state located above the inlet (IIA) of
The extraction operation is started as described above. Due to the siphon effect, hot water is extracted from the hot water tank (6).
When the level of hot water in ) falls below the suction port (21A) of the regulating pipe 121), air enters from the suction port (21A), and this air is sent into the siphon pipe (formerly) through the regulating pipe (21). to forcibly cancel the siphon effect and stop extracting hot water.

In this way, by adjusting the suction port (21A) of the regulating pipe Q1) to a position higher than the suction port (11) of the siphon pipe (Ll), extraction can be carried out at the level of the suction port (21A) of the regulating pipe Q1). Therefore, by adjusting the position of the suction port (21A) of the adjustment pipe Q) by vertically moving the operating rod (to), the amount of hot water extracted can be slightly varied.

(G) Effects of the Invention The present invention is capable of closing the water extraction valve with a delay time from when the upper level of the hot water tank is detected, which is slightly lower than the level at which the water level detection device i3'-siphon effect starts. , the siphon effect can be reliably started within this delay time, and since the siphon effect starts within the delay time, installation of the water level detection device, especially the upper reed switch, does not require precision in position and can be easily done. Installation can be carried out.

In addition, the amount of hot water extracted can be varied step by step by simply selecting the time until the water extraction valve closes from among multiple delay devices, and can quickly deal with the amount of coffee powder. Take advantage of the benefits you get.

Furthermore, by moving the position of the intake port of the adjustment tube up and down, the amount of extraction can be variably adjusted in small amounts, which is effective for delicately adjusting the concentration of coffee liquid. Moreover,
The adjustment tube can reliably terminate the siphon effect at a desired position, and exhibits excellent reliability.

[Brief explanation of drawings]

Figure WJ1 is a longitudinal sectional view showing the internal structure of the coffee brewing device of the present invention, Figure 2 is a partially enlarged view of Figure 1, and Figure 3 is an electric circuit diagram of the present invention. (6)...Hot water supply, (9)...Water extraction valve, I
...siphon tube, ◎...second water level detection device,
(15B)...Upper reed switch, α...
Selection switch, (19A1), (19A2)...normal amount contact, (19B1), (19B2)...increase contact, O...adjustment pipe, (21A)...intake port,
■...Operating device, r3υ...First delay relay,
(31A)...Normally closed first delay relay, (31B
)... Normally open first delay relay, G2... Second delay relay, q (32A)... Normally closed second delay relay contact, (32B)... Normally open second delay relay. relay contact. Figure 1 Figure 3rX!

Claims (1)

[Claims] 1. In a coffee brewing device that uses a siphon effect to extract hot water in a hot water supply tank heated by a heating device from a siphon pipe connected to the tank, one end is connected to the middle of the siphon pipe, and the other end is connected to the siphon pipe. A movable adjustment pipe that opens into the hot water tank, an operating device that moves the opening position of the other end of the adjustment pipe in the vertical direction, and a water extraction valve that opens to supply water to the bottom of the hot water tank based on a hot water supply command. and a water level detection device that detects the water level in the hot water tank that rises when the water extraction valve is opened, and is activated when the detection device detects an upper level in the hot water tank that is slightly lower than the level at which the siphon effect starts. A plurality of delay devices having different delay times and a selection switch for arbitrarily selecting any one of the delay devices are provided, and the siphon effect is started during the delay time of the delay device selected by the selection switch. The coffee brewing device is characterized in that the water extraction valve is closed after a delay time has elapsed.