JP2018007848A - Coffee extraction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To address such a problem that, in espresso, a fine foam called crema appears from the inside of extracted coffee liquid to a liquid surface of the extracted coffee to form a foam layer on the liquid surface, however, it is conventionally impossible to sustain the foam for 15 minutes or more.SOLUTION: A coffee extraction device includes: a mill for milling espresso beans; evenly-formed multiple holes from which hot water can be poured into a shower-like manner from an entire piston part 9 in such a manner not to form a deviated passage of a high-pressure hot water, to firmly press the finely-milled beans, and to make the hot water run through evenly and entirely; an auxiliary heater for heating a brewer cup 16 such that a temperature of extraction water becomes to 85°C-95°C; a hot water supply rotary vane pump; and a pipe for connecting them. The coffee extraction device improves opening/closing accuracy of a pressure regulation relief valve for protecting a high-pressure structure such as a boiler and a solenoid valve, where a check valve for preventing a counter flow from a hot water boiler 1, is integrated with the pressure regulation relief valve.SELECTED DRAWING: Figure 1

Description

  The present invention develops raw materials based on original taste standards and quality standards, from selection of beans to blending and roasting, draws out all the characteristics of the raw beans, and extracts beverage beverages (coffee) This is a development of a highly reliable coffee extraction device that reliably executes recipes and always maintains stable quality.

Coffee drinks are made by grinding coffee beans, making them into powder, and bringing them into contact with hot water, so that the components of the beans can be dissolved in the hot water.
Depending on how the beans are ground and the contact between the ground beans and hot water, various ways of brewing can be made, the taste of the finished coffee will change, and the way of enjoying the coffee will also change. In such a way of enjoying coffee, the following two methods are widely known.
The first is a paper drip method that is familiar to Japanese people. The beans are made from medium to coarse, then the ground beans are placed on a paper filter, hot water is poured onto the beans, and they are filtered by gravity.
The second is a method in which the beans are finely ground or extremely finely ground, put in a container that can withstand pressure, pressed, and then extracted with hot water of high temperature and high pressure.
There is a problem that the quality of espresso beverages is poor in a commercial coffee server in which these two methods are incorporated into one machine.
Specifically, in authentic Italian espresso, a brownish brown bubble called crema appears on the surface of the extracted coffee, and it creates a layer of foam on the surface. However, this foam layer was extremely poor and disappeared after 5 minutes. Normally, it should remain after 15 minutes. This invention is the coffee extractor which improved the crema quality of this espresso drink.
As a conventional coffee extractor, there are an extractor that can store hot water inside, an open / close valve that opens and closes an air introduction opening provided in the extractor, and a hot water pipe that supplies hot water in the extractor to the raw material And a hot water supply means for supplying hot water into the extractor and a pump for sucking the hot water in the extractor and discharging it from the hot water pipe to the raw material side, and only a predetermined amount of the hot water supplied to the raw material is supplied After supplying a raw material by a pump, in a beverage extraction device that supplies the remaining hot water to the raw material after a predetermined time has elapsed, when supplying only a predetermined amount of the hot water supplied to the raw material to the raw material, There is a beverage extraction device (for example, see Patent Document 1) having a control means for operating the pump with the open / close valve of the extractor closed and closing the open / close valve until the remaining hot water begins to be supplied to the raw material. Yes.

Japanese Patent Laid-Open No. 2001-101518 (see claims, detailed description of the invention, and FIGS. 1 to 8)

However, as mentioned in the background art, espresso has brown fine bubbles called crema appearing from the extracted coffee liquid on the surface of the extracted coffee, which forms a layer of bubbles on the liquid surface. In order to provide an espresso beverage that remains in the foam layer even after 15 minutes, improving the quality of the crema is a proposition, but the prior art cannot keep it for more than 15 minutes. There was a problem.
Therefore, in the present invention, a piston and cylinder cup part for extracting espresso, a rotary vane pump for supplying high-pressure hot water, a relief valve for keeping the extraction pressure constant, and a backflow from a hot water boiler with a sealed structure are prevented. An object of the present invention is to provide a coffee brewing apparatus that combines a check valve and piping.

The first aspect of the present invention is a coffee brewing apparatus as set forth in claim 1 and is as follows.
Piston and cylinder cup to extract espresso, pump to supply high-pressure hot water, relief valve to keep the extraction pressure constant, check valve to prevent backflow from a hot water boiler with a sealed structure, piping, etc. An espresso extractor combined with a espresso bean mill and a large number of holes so that hot water can be injected in a shower-like manner from the whole piston section so that even if high-pressure hot water is injected, there is no way to pass the hot water. And an auxiliary heater for heating the brewer cup at 65 ° C. to 85 ° C. so that the temperature of the extracted hot water is 85 ° C. to 95 ° C. The material of this brewer cup is made of stainless steel, etc. A metal with good heat conduction and a rotary vane pump for hot water supply, which are connected by piping, and high pressure such as boilers and solenoid valves Increasing the opening and closing accuracy of the pressure regulating relief valve to protect the concrete body is a structure formed by integrating the check valve and a pressure regulating relief valve to prevent back flow from the hot water boiler.

Since the coffee extraction apparatus according to the present invention has the configuration as described above, the following effects can be obtained.
(1) Piston and cylinder cup for extracting espresso, pump for supplying high-pressure hot water, relief valve for keeping the extraction pressure constant, check valve for preventing backflow from a hot water boiler with a sealed structure The quality of espresso beverages has been improved through the combined technique of reviewing all of these.
(2) The basic unit of espresso drink is only 30cc, which is called one shot, and 2 shot is 60cc, which is 30cc twice. A firm crema must be generated during the coffee extraction at only 30 cc. In order to produce a beautiful, long-lasting crema, the coffee beans were ground finely, and even if high-pressure hot water was poured in, it was not possible to create a sidewalk (runner).
(3) The finely ground beans must be pressed and solidified, and the piston must have a structure that allows hot water to reach the entire area. The structure is such that hot water can be poured.
(4) The brewer cup is heated to 65 ° C. to 85 ° C. with an auxiliary heater so that the temperature of the extraction hot water for extracting only 30 cc is 85 ° C. to 95 ° C. In order for this heating to spread efficiently over the entire cup, the material of the brewer cup is changed from glass-filled resin to stainless steel.
(5) review the supply of hot water by the electromagnetic pump, since the supply of hot water by a rotary vane pump, a pressure of about ^8kg / cm ^{2 ~12kg} / cm 2 required to produce a clean crema during extraction of 30cc In order to reach a short time, the rotary vane pump was more advantageous than the electromagnetic pump.
(6) It was found that the accuracy of opening and closing the pressure regulating relief valve for protecting these series of pipes and high-pressure structures such as boilers and solenoid valves is also very important. The accuracy of opening and closing of this valve is poor compared to the conventional ones, leading to abnormal noise due to chattering, and the stability of the extraction pressure is impaired, preventing the production of beautiful crema.
(7) Since it was found that the check valve for preventing the back flow from the hot water boiler had the same factors, these valves were replaced with high precision valves. At this time, a composite valve that integrates a relief valve and a check valve was installed to reduce hot water leakage from the high-pressure piping, reduce the cost of piping parts, and save space. If there is enough space, the relief valve and the check valve may not be integrated.

It is a piping system diagram for showing operation explanation of a coffee extraction device in one example of the present invention. 1 shows a large number of holes formed in the end face of a piston in one embodiment of the present invention, (a) a number of holes formed concentrically, (b) a large number of gaps by knitting in a mesh shape. It is a front view which shows what formed. It is a piping circuit diagram which shows the piping circuit in one Example of this invention. It is an electrical connection diagram which shows the electrical connection in one Example of this invention. It is an electric circuit diagram which shows the electric circuit of this invention. It is a water supply system figure which shows the water supply state of this invention. It is a piping route figure showing the piping state of the present invention. It is a hot water boiler system diagram which shows the system of the hot water boiler of this invention. It is a steam boiler system diagram which shows the system | strain of the steam boiler of this invention. It is a milk delivery system diagram which shows the system | strain of milk delivery of this invention. It is a coffee extraction system diagram which shows the system | strain of coffee extraction of this invention.

  Piston and cylinder cup to extract espresso, pump to supply high-pressure hot water, relief valve to keep the extraction pressure constant, check valve to prevent backflow from a hot water boiler with a sealed structure, piping, etc. An espresso extraction device using a combination technique, and a mill that finely grinds espresso beans is set up so that even if high-pressure hot water is injected, the finely ground beans are pressed and solidified so that there is no way to pass the hot water. A large number of holes are provided on the whole so that hot water can be poured in from the entire piston part so that hot water can be distributed throughout the entire body, and the temperature of the extracted hot water is 85 ° C to 95 ° C. An auxiliary heater that heats the brewer cup at 65 ° C to 85 ° C is provided. The brewer cup is made of a metal such as stainless steel, and hot water is supplied. A rotary vane pump is installed, connected with piping, and a check valve for preventing back flow from the hot water boiler by increasing the opening and closing accuracy of the pressure adjustment relief valve for protecting high pressure structures such as boilers and solenoid valves. Is a coffee brewing device that integrates the pressure adjustment relief valve with space efficiency in mind.

Hereinafter, a coffee extraction device according to an embodiment of the present invention will be described with reference to the drawings.
FIGS. 1 to 11 show an embodiment of the present invention, FIG. 1 is a piping system diagram, FIG. 2 shows a large number of holes formed in the end face of the piston, and (a) is a large number of concentric circles. (B) is a front view showing a plurality of gaps formed by knitting in a mesh, FIG. 3 is a piping circuit diagram, FIG. 4 is an electrical connection diagram, and FIG. 5 is an electrical circuit diagram. 6 is a water supply system diagram, FIG. 7 is a hot water boiler system diagram, FIG. 8 is a steam boiler system diagram, FIG. 9 is a milk delivery system diagram, FIG. 10 is a coffee extraction system diagram, and FIG.

A specific embodiment of this coffee brewing apparatus will be described in detail with reference to FIGS.
First, the operation will be described with reference to FIG. 1. In the start state, the raw material is unloaded from the espresso coffee hopper 3, passed through the coffee chute espresso 4, and charged into the espresso mill 5. The charged raw material is pulverized by the espresso mill 5, passed through the espresso mill chute 6 and the espresso ground bean chute 7 and charged into the cylinder 10. At that time, in order to prevent the ground beans from being clogged in each chute, vibration is given by the tack board. After the ground beans have been charged, the piston 9 is lowered, and the drag ejector 11 is moved from the right side to the left side as shown in the figure, so that the distribution of the ground beans in the cylinder 10 is made uniform and the piston 9 is further lowered. Then, the beans are tamped (compressed), and the piston 9 is slightly raised after an arbitrary tamping time. Reference numeral 13 denotes an ejector lever.
An example as shown in FIG. 2 is considered so that the piston 9 can be lowered and inserted into the cylinder 10 so that the hot water can be poured from the entire piston 9 in a shower-like manner. It is done. The many holes shown in FIG. 2 (a) are formed concentrically from the center. However, the holes shown in FIG. 2 (b) in which a large number of gaps are formed, spirals, Needless to say, it is sufficient if a large number of holes are formed, such as a radial pattern or a random pattern.

  Next, the extraction state will be described. Hot water of the hot water boiler 1 is pumped by the extraction pump 18 through the espresso water valve 2, the espresso brewer hose IN8, and the piston 9 to the ground beans in the cylinder 10, and the extracted liquid is From the extraction outlet of the cylinder 10, it passes through the brewer hose OUT 14 and is carried out from the espresso nozzle 12 to the cup 16 placed on the cup tray 17. There are “Muramushi process” and “Main extraction” for the extraction process, and the setting of the amount and time of the tangled hot water can be changed, and the setting of the tamping pressure, tamping time and cylinder return after tamping can be changed. is there.

  Finally, the extraction completion state will be explained. When the extraction process is completed, the piston 9 descends and press drying is performed. (Note that the press drying can change the setting of the press drying pressure and the press drying time. When the piston 9 is lifted after the press-drying is finished, the lower filter 12 in the cylinder 10 is also lifted and lifted out of the extraction waste cylinder in the cylinder 10, and when the lower filter 12 reaches the top dead center, By moving the leg ejector 11 in the right direction as shown in the figure, the coffee residue can be discarded to the right side. When the piston 9 returns to the top dead center at the standby position, a series of extraction steps is completed.

Next, one embodiment of the piping state will be described with reference to FIG.
The cistern 19 is supplied to the hot water boiler 1 via the flow meter 20, the joint 21 through the rotary vane pump 22, the joint 24 through the pressure gauge 23, and the other through the relief valve 25 through the joint 26. Is.

An embodiment of the electrical connection will be described with reference to FIG.
The AC power supply is connected to the power supply board 29 and simultaneously connected to the DC power supply 28, and the DC power supply 28 is connected to the rotary vane pump 22 via the pump motor relay 27 and the other is connected to the electromagnetic pump signal line. .

Next, an embodiment of the electric circuit will be described with reference to FIG.
As shown in (a), an AC power source is connected to a DC power source 28 via an electromagnetic pump drive relay 30 and a pump motor relay 27, and is connected to the pump motor drive relay 27 and the rotary vane pump 22 by the DC power source 28. It is.

Next, an embodiment of the water supply system will be described with reference to FIG.
From the water supply through the soft water filter 31 to the cistern 19 via the water supply solenoid valve 32, from this cistern 19 via the strainer 33, one of them passes through the flow meter (for espresso hot water control) 34 and the extraction pump 18 (during beverage delivery) The water is supplied to the hot water boiler and used to carry out the hot water) and supplied to the hot water boiler 1. A bypass for directly connecting IN and OUT of the extraction pump is provided via the flow meter 34, and a first relief valve 35 is provided on the OUT side. The other pipe is installed from the upstream side of the flow meter 34, and water is supplied to the steam pump 36 (for supplying water to the steam boiler when the steam is carried out) and supplied to the steam boiler 36. A bypass is provided by bypassing the steam pump 36 between IN and OUT of the steam pump 36, and a second relief valve 37 is provided on the OUT side. A strainer is disposed between the OUT and the steam boiler 38. The cistern 19 is provided with overflowed water and a drain valve that can be drained when necessary, and drains it into a drainage container.

Next, an embodiment of the hot water boiler system will be described with reference to FIG.
The extraction pump 18 includes a hot water boiler 1 to a regular two-way solenoid valve for hot water supply, a three-way solenoid valve for espresso hot water supply, a two-way solenoid valve for hot water nozzle, a two-way solenoid valve for milk former rinse, and a hot water boiler at a set frequency. A general solenoid valve 39 having a two-way solenoid valve for hot water boiler full control that fills the inside of the boiler 1 is interposed.
The hot water supplied through the two-way solenoid valve for hot water nozzle can be carried out by the manual lever, and hot water is supplied from the hot water nozzle 40.

Next, an embodiment of the steam boiler system will be described with reference to FIG.
The steam pump 36 is supplied to a steam boiler 38 capable of adjusting the temperature and pressure, and is fed via a two-way solenoid valve for a steam nozzle to a steam nozzle 41 for steam discharge by a manual lever via a two-way solenoid valve for a milk former. Connected to
The steam boiler 38 is closed when the steam is carried out, and the steam in the steam boiler 38 after the steam is carried out is sent to the condenser, and the steam in the steam boiler 38 after the steam is carried out is discharged by the condenser as water. is there.

Next, an embodiment of the milk carry-out system will be described with reference to FIG.
The steam boiler 38 sucks milk by steam through a milk former 42 via a two-way solenoid valve for milk former rinsing, heats it, and mixes with air to produce and supply steam milk or foamed milk. is there.
In order to handle milk, more specifically, the following mechanism is provided.
When supplying milk from the milk cooler to the milk former 42, a milk temperature adjusting pinch valve is provided for manually adjusting the temperature by changing the amount of milk. Further, when the milk runs out of the milk former 42, the backflow of the milk is prevented. Check valve for air, an air throttle valve that adjusts the foaming amount of foamed milk with an air amount adjusting needle valve, and a two-way solenoid valve for air intake when the foamed milk is taken out .

Next, an embodiment of the coffee extraction system will be described with reference to FIG.
First, espresso coffee will be described. Espresso beans are fed from an espresso bean hopper to an espresso coffee mill and milled. Espresso hot water is supplied to an espresso brewer by controlling a solenoid valve for hot water supply to extract espresso coffee. . The extracted espresso coffee is supplied to an espresso nozzle, and espresso coffee is provided from the espresso nozzle.
In addition, regular coffee is milled by supplying regular beans from a regular coffee bean hopper to a regular coffee mill, and controlling the regular brewer by controlling the two-way solenoid valve for regular hot water supply, like espresso coffee. The regular coffee is extracted by a regular coffee extraction paper type, and the extracted regular coffee is supplied to the regular nozzle, and the regular coffee is provided from the regular coffee nozzle.

Finally, FIG. 11 is shown as an explanation of the entire contents described above. Since the contents are a summary of FIGS. 5 to 9, description thereof will be omitted.
As described above, the coffee brewing apparatus of the present invention is a coffee brewing apparatus that is equipped with two mills that draw out the characteristics of coffee brewers and beans, and can provide regular coffee and espresso coffee.
In other words, since the regular and espresso dedicated mills are installed, freshly ground coffee with the highest aroma can be extracted and provided.
Regular coffee can be extracted with a revolutionary paper drip system for each cup, so the aroma and freshness are different from freshly made. And since espresso coffee is extracted with a dedicated brewer, cappuccino and latte can be made deliciously by anyone with the touch of a skilled barista at the touch of a button.

  It can also be used for cup-type beverage vending machines.

1 .... hot water boiler 2 .... espresso hot water valve 3 .... espresso coffee hopper 4 .... coffee chute espresso 5 .... espresso mill 6 .... espresso mill chute 7 ....・ Espresso ground bean chute 8 ... Espresso brewer hose IN
9 .... Piston 10 .... Cylinder 11 .... Drag ejector 12 .... Lower filter 13 ... Ejector lever 14 ... Brewer hose OUT
15 ... Espresso nozzle 16 ... Cup 17 ... Cup tray 18 ... Extraction pump 19 ... Systern 20 ... Flow meter 21 ... Joint 22 ... · Rotary vane pump 23 ··· Pressure gauge 24 ··· Joint 25 · · · Relief valve 26 · · · Joint 27 · · · Pump motor relay 28 · · · DC power supply 29 · · · Power source Substrate 30 ... Electromagnetic pump drive relay 31 ... Soft water filter 32 ... Water feed solenoid valve 33 ... Strainer 34 ... Flow meter 35 ... First relief valve 36 ... ... Steam pump 37 ... Second relief valve 38 ... Steam boiler 39 ... General solenoid valve 40 ... Hot water nozzle 41 ... Steam nozzle 42 ... Milk four Ma

Claims (1)

Piston and cylinder cup to extract espresso, pump to supply high-pressure hot water, relief valve to keep the extraction pressure constant, check valve to prevent backflow from a hot water boiler with a sealed structure, piping, etc. An espresso extractor combined with a espresso bean mill and a large number of holes so that hot water can be injected in a shower-like manner from the whole piston section so that even if high-pressure hot water is injected, there is no way to pass the hot water. And an auxiliary heater for heating the brewer cup at 65 ° C to 85 ° C so that the temperature of the extracted hot water is 85 ° C to 95 ° C. The material of this brewer cup has good heat conduction. Made of metal and provided with a rotary vane pump for hot water supply, these are connected by piping, and also protect high pressure structures such as boilers and solenoid valves Pressure regulating relief raised off accuracy of the valve, coffee brewing apparatus being characterized in that integrated check valve and a pressure regulating relief valve to prevent back flow from the hot water boiler for.

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