JPS61280813A - Quantitative hot water feeder in 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 Field of Industrial Application The present invention relates to a metered water supply device in a coffee extraction device that obtains an extract by pouring hot water into a material to be extracted such as coffee powder. It is.

BACKGROUND OF THE INVENTION Generally speaking, it is considered ideal to extract coffee at high temperatures, in a short period of time, and evenly from all parts of the coffee.

For this reason, coffee brewing devices that pressurize with a pump or the like to extract coffee in a short period of time have conventionally been used.

By the way, metered hot water supply in this type of coffee brewing device is performed by controlling the operating time of a pump that pours hot water under pressure.

On the other hand, the amount of coffee extracted at one time is 1 to 2 cups, and for this type of coffee, a dimitasse cassop is used, which means that 60 CC to 12 o CC of coffee can be extracted for 20 seconds or more.
It will be extracted in about 60 seconds.

Problems to be Solved by the Invention However, in such a conventional configuration, the error rate in the timer setting time is very different if the amount of coffee extracted is 2 cups, but if the amount of coffee extracted is 1 cup, it is directly equivalent to the error in the amount extracted. Become. In other words, for example, when trying to brew 1 cup of 6QCC in 20 seconds, if the extraction time has an error margin of 10% (2 seconds), the amount of coffee extracted will have an error of 6CC, which is 10% of 60CC. . For this reason, extremely high accuracy in extraction time is required, which is a factor in high costs, and productivity has never been high.

In addition, the pump capacity used in this type of coffee brewing device is t69 to meet the ideal coffee extraction conditions.
A pressure of about kgf/cA is required. By the way, the characteristic of this type of pump is that the discharge rate increases rapidly as the pressure decreases, and on the other hand, as the pressure increases, the discharge rate rapidly decreases. If the amount and particle size of a given coffee powder changes, the pressure will change and the delivery rate will also change.

Therefore, it is very difficult to control the amount of coffee extracted by the extraction time, so it is difficult to control the amount of coffee extracted by the extraction time.
It was lowered to about 3 kg f/c- and was used in a range where the discharge amount changes little due to pressure changes. Therefore, it was not possible to extract ideal coffee.

The present invention solves these problems, and provides a metered water supply device for a coffee extraction device that can extract ideal coffee, etc. with a simple configuration, and is also easy to use and can perform metered hot water supply. The purpose is to

Means for Solving the Problems In order to solve the above problems, the present invention provides a metering tank that communicates with the bottom of the water tank via a water supply valve and is disposed below the water tank; A ventilation pipe that opens above the highest water level and communicates with the metering tank, and a water supply device that opens near the bottom of the metering tank on one side and conveys water in the metering tank, and the other side is connected to the material to be extracted. The structure consists of a water supply channel opened to the water supply channel and a heater installed in the water heating unit that supplies the water through the water supply channel.

With this configuration, the water flowing from the water tank through the water supply valve into the metering tank is separated by a water supply valve that is closed after the metering tank is full, and is metered with a preset volume of the metering tank, The water is then sent by a water supply device, further boiled by a water heating unit, and poured onto the material to be extracted.

Embodiment One embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, 1 is a water tank with an open top, and this water tank 1 is connected to a metering tank 4 disposed below the water tank 1 through a water supply pipe 3 through a water supply valve 2 from the bottom of the water tank 1.
It communicates with Reference numeral 5 denotes an electromagnetic high-pressure pump that serves as a water supply device in the measuring tank 4. One side of the pump 5 is opened near the bottom of the measuring tank 4, and the other side is used to pump coffee powder for one pump. It is located on the metering tank 4 side of the water supply channel 7 opened in the enclosed capsule 6. Reference numeral 8 denotes a water boiling unit, and the water boiling unit 8 includes a heating path 9, which is a part of the water supply channel 7, and a heater 1o for boiling water. 11 is a first float switch which is a water level detector built into the measuring tank 4;
When the water level drops to a predetermined water level, the operation of the pump 5 is stopped. Further, this first float switch 11 does not start operation of the pump 5 below a predetermined water level.

In addition, when the water level falls to the level of this first float switch 11, 91 minutes of eoca for one Diitas cup is reached.
In addition, the water level up to B is set at 120cc, which is equivalent to one regular cup of coffee.

Reference numeral 12 designates a thin tube-shaped ventilation pipe, which opens above the highest water level of the water tank 1 and connects to the measuring tank 40.
It communicates with heaven.

13 is a second float switch installed in the water tank 1, and when the second float switch 13 rises to a predetermined water level, the metering tank 4 becomes full of water and the pump 6 can be operated. .

Further, the second float switch 13 does not start operation of the pump 5 below a predetermined water level.

Reference numeral 14 denotes a control valve that opens and closes a communication section between the water tank 1 and the ventilation pipe 12. 16 is water tank 1 and measuring tank 4
This is a drain valve that drains the water inside. Reference numeral 16 designates a drain valve that prevents a pressure increase due to heating of the heater 10 in the heating path 9 other than during extraction, and drains the remaining hot water in the heating path 9; The capsule 6 is hermetically stored in a capsule storage part provided in the opening device. 18 is a dibatas cup, which directly receives the brewed coffee.

The operation of the coffee extraction device constructed as described above will be described below with reference to FIG. 2, focusing on the quantitative water supply device.

First, in the initial state τ, the water supply valve 2 is "open", the control valve 14 is "closed", and the drain valve 16 is "
"closed" and the drain valve 16 is "open".

When electricity is first started to be applied to the heater 10, the water boiling unit 8 is heated and controlled to a predetermined temperature by an automatic temperature controller (not shown). Next, when the water tank 1 is filled with water, the water flows from the water supply pipe 3 to the metering tank 4 via the water supply valve 2. At this time, the air in the measuring tank 4 is
It is expelled from the ventilation pipe 12 without staying inside. Injecting water into the water tank 1, the required amount of water is equal to or higher than the lowest water level of the water tank 1 at which the metering tank 4 is filled and the second float switch 13 installed in the water tank 1 operates. . Next, the capsule 6 is airtightly stored in the capsule storage portion 17, the dimitasse cup 18 is set below it, and the activation switch (not shown) of the τ pump 6 is operated. At this time, if the amount of water injected into the water tank 1 is less than the minimum water level and the second float switch 13 is not operating, the pump 5 will not operate and more water will be injected into the water tank 1. Simultaneously with (or before) operating the activation switch of the Bonpro, the water supply valve 2 and the drain valve 16 are closed and the pump 5 is activated. By the operation of this pump 5, the water in the metering tank 4 and the vent pipe 12 is forced through the water supply channel 7, heated in the heating channel 9, reaches the coffee powder in the capsule 6, and extracts the coffee. The data are sequentially supplied into the data cassop 18. On the other hand, air enters the metering tank 4 from the ventilation pipe 12 as the water is drained.

There is no negative pressure. When further extraction is performed and the preset amount of water e o cc of coffee has been extracted, the water in the measuring tank 4 is transferred to the first float switch 1.
Since the water is drained to the water level No. 1, this causes the No. 1 float switch 11 to operate and stop the operation of the pump 5.
Coffee extraction is completed. Note that when the water amount setting for coffee extraction is set to 12,000, the water in the measuring tank 4 passes through the water level of the first float switch 11 and is drained to the water level B of the first float switch 11. ℃ pump 5 is stopped and the temperature reaches 120C.
Complete O's coffee extraction.

Then, at the same time as (or after) the pump 6 stops operating, the water supply valve 2 and the drain valve 16 are opened.
Then, in the measuring tank 4, the water for the next hot water supply is stored in the measuring tank 4.
At the same time, in the water boiling unit 8, the boiling pressure generated by the heating of the heater 10 energized by the automatic temperature controller, which is activated by the temperature drop caused by the water flowing into the heating path 9 during coffee extraction, and the remaining hot water are pumped through the drain valve 16. P7 niyama+J+z/l-1/F--+-/-4m+
+j1 line L +Lr 17411 If the result is 17411, repeat the same operation as above nine times.

Also, when it is necessary to brew coffee or supply hot water with a water volume setting of 60cc or 120cc or more, the water supply valve 2, which is linked to the operation of the pump 5, must be closed, and the control valve 14, which is opened and closed independently, must be opened. It is possible to supply a large amount of hot water.

As described above, according to this embodiment, below the water tank 1,
A measuring tank 4 is provided which communicates with the bottom of the water tank 1 through a water supply pipe 3 via a water supply valve 2, and the measuring tank 4 has a water level of 6 occ drained from full water and a water level of 12 occ from full water.
A first float switch 11 for detecting the water level B which has been drained at 0cc is installed inside the water supply channel 7 which communicates with the coffee powder in the τ capsule 6 via the bottom surface of the metering tank 4 and the pump 5. is equipped with a water heating unit 8 equipped with a heater 10, and when the water level is above the operating water level of the second float switch 13 that detects at least the lowest water level of the water tank 1, the metering operation is separated by the closing of the water supply valve 2. Select the water on the tank 4 side with the water level B-i across the float switch 11 of the housing 1 according to the water volume setting, and then pump the pump 5.
water is drained from the cup, and water is boiled in the hot water unit 8 and then pumped to the coffee powder in the capsule θ at a temperature of ℃.With a simple configuration, metered hot water supply with minimal variation in the amount of hot water supplied to the coffee powder is possible. Ta.

In addition, the water supply valve 2 is generally an electrically operated electromagnetic valve, but the capsule storage part 1 of the capsule 6
By mechanically interlocking the opening and closing operations of the water supply valve 2 with, for example, the rotation operation when storing the water supply valve 2 in the water supply valve 7, the water supply valve 2 can be made inexpensive in terms of cost.

Note that the measuring tank 4 may be arranged so that its top surface is below the lowest water level of the water tank 1 so that water flows to the measuring tank 4 side by a head difference.
- Toswift 13 is not necessary if the structure allows the lowest water level to be visually confirmed.

It goes without saying that the first float switch 11 is only an example of a water level detector and can be replaced with various other devices. Furthermore, if the water supply (hot water supply) for the extracted material from the measuring tank 4 is based on a head difference, the water level detector such as the float switch can be used as a substitute. No detector required. Furthermore, the water tank 1 can be directly connected to the water supply, and in this case, the water tank 1 is connected via a water level detector that detects the highest water level of the water tank 1 and a water injection valve that is closed by the operation of this water level detector. It is sufficient if it connects to 1. Further, the amount of water measured δ in the measuring tank 4 is not limited to one pump (60 cc and 120 cc), and can be set as appropriate.

In addition, the opening and closing of the water supply valve 2 is not limited to interlocking with the operation of the pump 6; it may be closed before the pump 5 is activated and opened after the operation; furthermore, if the water supply valve 2 is configured to open and close independently, it can be controlled. No valve required.

- Furthermore, it goes without saying that the coffee powder is not limited to the one enclosed in the capsule 6, nor is it limited to this coffee powder.

In one embodiment of the present invention, a pressure-type coffee brewing apparatus has been described, but the invention is not limited to this pressure-type coffee brewing apparatus. It is also effective for drip-type coffee brewing using hot water.

Effects of the Invention As described above, according to the present invention, there is a metering tank that communicates with the bottom of a water tank via a water supply valve and is disposed below the water tank, and a metering tank that opens above the highest water level of the water tank. and a ventilation pipe communicating with the measuring tank, and a water supply channel having one end opened near the bottom surface of the measuring tank and the other end opening to the material to be extracted via a water conveying device that conveys water in the measuring tank. This system consists of a water supply channel and a heater installed in the water boiling unit for the water that is sent through the water supply channel.It has a simple structure and eliminates variations in the amount of coffee extracted due to pressure changes, achieving ideal high-pressure extraction. It has the excellent effect of making it possible to supply metered hot water with ease of use.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a quantitative hot water supply device in a coffee extraction device showing one embodiment of the present invention, and FIG. 2 is a flowchart showing the operating procedure. 1... Water tank, 2... Water supply valve,
4...Measuring tank, 5...Pump, 6
... Capsule, 7 ... Water supply channel, 8 ...
...Kettle unit, 1o...Heater,
11...First float switch, 12...
...Vent pipe.

Claims (1)

[Claims] a metering tank that communicates with the bottom of the water tank via a water supply valve and is disposed below the water tank; a vent pipe that opens above the highest water level of the water tank and communicates with the metering tank; a water supply channel which is opened near the bottom of the measuring tank and whose other end is opened to the material to be extracted via a water supply device that transports the water in the measuring tank, and a water heating unit for water to which this water supply channel is sent. A quantitative hot water supply device for a coffee extraction device, which is configured with a heater.