JP3649330B2 - Black tea extraction method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a black tea extraction method and apparatus.
[0002]
[Prior art]
There existed what was shown to patent document 1 as this kind of conventional technology. That is, hot water is supplied from the hot water boiler to the extraction container. Boiled hot water is good for putting delicious tea, but the hot water in the pipe from the boiler to the hot water supply head has a considerable temperature drop, making it unsuitable for delicious tea. As a means for solving this, in this prior art, a circulation pump is provided so that hot water boiled by a boiler can always be supplied into the pipe.
In addition, boiling water with melted air is good for putting delicious tea, but when boiling water with a boiler method, the water in the boiler is overboiled. Therefore, the air dissolved in the water is vaporized and becomes hot water containing no air, and is not suitable for black tea. As a method for solving this problem, in this prior art, an air pump is provided so that new air is always fed into the boiler and the air is dissolved in the hot water in the boiler.
[0003]
[Patent Document 1]
JP 2002-306345 A (page 3, column 3, line 40 to column 4, line 3)
[0004]
[Problems to be solved by the invention]
However, hot water from the boiler is constantly circulated by the continuous operation of the hot water supply pump, and air is always supplied to the boiler by continuous operation of the air pump. Therefore, the running cost of both these pumps is increased, and energy is wasted. Further, since air is always supplied to the boiler, the temperature in the boiler is lowered accordingly.
An object of the present invention is to provide a tea extraction method and apparatus that can solve the above-mentioned problems, can easily compensate for a temperature drop in the flow path from the hot water supply apparatus to the extraction container, and can save running costs. And
[0005]
[Means for Solving the Problems]
In the black tea extraction method according to the first aspect of the present invention, a discharge tube is formed at the bottom of the extraction container, a filter is attached to the inlet thereof, a stationary seat having a discharge port is provided in the main body frame, Inserting the discharge tube of the extraction container, placing the tea leaf into the extraction container, and then inserting a pouring nozzle whose tip is bent so that the jet fluid swirls along the inner surface of the extraction container It is inserted into the inside from the upper end opening of the extraction container, hot water and steam are supplied, and after a certain period of time, a discharge valve provided below the stationary seat is opened and discharged into the beverage container.
[0006]
The black tea extraction method according to the second aspect of the present invention, in addition to the first aspect, mixes hot water and steam before reaching the pouring nozzle when supplying hot water and steam at a pressure from each boiler. It is characterized by.
[0007]
In the black tea extraction method according to the third aspect of the present invention, in addition to the first aspect or the second aspect, when the pouring nozzle is inserted into the extraction container, the spout of the pouring nozzle is provided in the container. It is characterized by being held so as to be located above the hot water surface.
[0008]
The tea extraction apparatus according to the fourth aspect of the present invention is an extraction container having a filter at the inlet of a discharge tube port formed at the bottom, a main body supporting the extraction container, and an upper end opening of the extraction container. The pouring nozzle is bent so that the jet fluid swirls along the inner surface of the extraction vessel, the elevating means of the pouring nozzle, and hot water is supplied to the extraction vessel A hot water boiler, a steam boiler that supplies steam to the extraction container, and a stationary seat that has a discharge port provided in the main frame so that the discharge tube port of the extraction container is liquid-tightly mounted It is characterized by that.
[0009]
The black tea extraction apparatus according to the fifth aspect of the present invention is characterized in that, in addition to the fourth aspect, a hot water and steam mixing valve provided before reaching the pouring nozzle is provided.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below based on an embodiment shown in the drawings. If the embodiment of the present invention is generally described as shown in the pipe system diagram of FIG. 1, hot water and steam are transferred from a hot water boiler 6 and a steam boiler 7 to a plurality of extraction containers 1 through a mixing valve 8f. It is mixed and introduced from the pouring nozzle 3. A cup A is placed directly under the extraction container 1.
[0011]
2 and 3, the extraction container 1 that contains tea leaves and hot water and mixes them to produce an extract liquid has a spherical shape (or a cylindrical shape) as a whole. A filter (upwardly convex hemispherical metal mesh) 1b is provided by being pulled downward by a coil spring 1d at the inlet of the discharge tube port 1a formed at the bottom of the extraction container. A rubber packing 1c is fixed to the outer periphery of the discharge cylinder port 1a. A stationary seat (short-end cylindrical body with a flange) 2a having a discharge port 2b is attached to the main frame 2 with a nut 2c. And the rubber packing 1c of the discharge cylinder port 1a of the extraction container 1 is liquid-tightly attached to the discharge port 2b of the stationary seat 2a. The discharge unit 9 includes a discharge valve 9b and a discharge nozzle 9c from the stationary seat 2a through the connection tube 9a. Cup A is placed directly below.
[0012]
A pouring nozzle 3 is provided so as to be movable up and down so as to enter and exit from the upper end opening of the extraction container 1. That is, when the upper end of the vertical pipe body 3a is bent in an inverted L shape, its tip is bent downward, and when the jet outlet 3b at its tip enters the extraction container, Inclined with respect to the radial direction. Thereby, a component force in the tangential direction of the circumference is generated in the ejected fluid in the horizontal plane of the inner surface of the container.
[0013]
In the pouring nozzle raising / lowering means 4, the pipe main body 3 a of the nozzle 3 is inserted in a guide cylinder 4 a erected on the main body frame 2 so as to be movable up and down. The pipe body 3a has a mounting ring 4b that can be fixed and released by screws, and the lower end of the drive rod 4c connected to the mounting ring is connected to the crank plate 5b via a connecting link 5c. Is directly connected to the lifting motor 5a. Reference numeral 4d denotes a bar guide, which is fixed to the apparatus main body.
[0014]
In FIGS. 1 and 2, a flexible hose serving as a hot water / steam mixing tube 8g is connected to the lower end of the pipe body 3a, and its end is connected to the hot water supply means 6 and the steam supply means 7. . A hot water pipe system 8a from the hot water boiler 6 is connected to an electromagnetic three-way mixing valve 8f for each extraction container via a pressure reducing valve 8h (2 kg / cm ² G) and a hot water branch header 8b.
[0015]
A steam pipe 8c from the steam boiler 7 is connected to the three-way mixing valve 8f through a steam branch header 8d. An electromagnetic shut-off valve 8e is provided up to the mixing valve. The hot water boiler 6 as a hot water supply means has a pressure of 4 kg / cm ² G (several times higher than the atmospheric pressure), a temperature of 95 to 97 ° C. (a temperature just before boiling of water at the atmospheric pressure, the pressure of the hot water boiler 6 is Under temperature). As a steam supply means, the steam boiler 7 has a pressure of 2 kg / cm ² G and a temperature of 120 ° C. (saturation temperature). Thus, the pressure of the hot water boiler 6 is made higher than the pressure of the steam boiler 7, and the same pressure is obtained by the pressure reducing valve 8h. Tap water is supplied to the hot water boiler 6 through a water supply pipe 8i and a water purifier (not shown).
[0016]
In carrying out the method of the present invention, the extraction container 1 and its discharge cylinder 1a are inserted and placed in the stationary seat 2a of the main frame 2 and the tea leaves are put into the extraction container. Next, the hot water pouring nozzle 3 is inserted into the extraction container, hot water and steam are supplied, and after a certain period of time, the discharge valve 9b provided below the stationary seat 2a is opened and discharged into the beverage container A.
[0017]
One specific example for carrying out the method of the present invention is as follows. Now, the pouring nozzle 3 is in a lowered state. The shutoff valve 8e and the mixing valve 8f are opened in the empty extraction container 1 in the stationary seat 2a, hot water and steam are put therein, the container is warmed, and the mixing valve 8f is closed. Also, when there is a remaining amount of tea leaves extracted last time, hot water and steam are similarly introduced, the tea leaves are discharged and washed, and the container is warmed, and the discharge valve 9b is opened to discharge the remaining water in the pipe.
[0018]
Next, the hot water pouring nozzle 3 is raised, the extraction container 1 is pulled out from the stationary seat 2a, tea leaves are put therein, and set again on the stationary seat. Next, the nozzle raising / lowering part 4 is operated, the nozzle 3 is lowered | hung, and the jet nozzle 3b is put into the extraction container 1 inside. Then, the mixing valve 8f is opened and hot water and steam are introduced. And after a fixed time (about 1 minute), the discharge valve 9b is opened and the extracted black tea is poured into the cup A. At this time, in order to warm the cup in advance, the steam manual valve 11 is opened and steam is introduced from the steam nozzle 10 into the cup.
[0019]
As described above, in the present invention, it is considered that the hot water in the hot water boiler 6 has vaporized and released air. However, since steam from the steam boiler 7 provided separately is mixed by the mixing valve 8f and jetted vigorously into the extraction container 1, hot water suitable for black tea containing air is obtained in the extraction container.
[0020]
Moreover, in the said Example, the step which warms the extraction container 1 before an actual extraction (before putting tea leaves), and the washing | cleaning of the tea liquid extracted previously, and replacing the hot water with the temperature fall in piping are incorporated. And after discharging | emitting once, it is the system which puts a tea leaf in an extraction container and performs this extraction. Therefore, since the hot water temperature in the pipe is slightly lowered in a short time from the pre-filled hot water to the main extraction, it is expected that the hot water is not boiled. However, with the hot water / steam mixing method, the hot water temperature was raised and hot water at a temperature suitable for black tea extraction could be supplied.
[0021]
Here, the jet fluid exiting from the nozzle 3 generates a swirling flow along the inner surface in the horizontal plane of the container 1, so that the stirring action is extremely efficient and promotes the deliciousness of the tea. In addition, the mixed fluid of hot water and steam is prevented from being ejected from the upper opening of the extraction container to the outside as much as possible (the extraction container may or may not be provided with a lid). At the same time, there is a “steaming effect”.
[0022]
In addition, when hot water and steam are introduced while inserting the jet nozzle 3b of the pouring nozzle 3 into the extraction container 1 from above and holding it above the hot water surface, the following effects are obtained. That is, since the jet fluid always swirls with fresh air existing above the hot water surface, it contains a lot of air to promote the so-called “jumping effect” and to extract delicious black tea. At the same time, there is a “steaming effect”.
[0023]
The present invention is not limited to the above-described embodiments and embodiments, but includes various modifications without departing from the spirit and scope of the claims.
[0024]
【The invention's effect】
According to the present invention, a temperature drop in the flow path from the hot water supply device to the extraction container can be easily compensated. Moreover, since there is no circulation pump and air pump as in the prior art, the running cost can be saved.
In addition, when hot water and steam are introduced while inserting a hot water pouring nozzle into the extraction vessel from above and holding it above the hot water surface, the jet fluid always swirls with fresh air existing above the hot water surface. As a result, a large amount of air was promoted to promote the so-called jumping effect, and delicious tea could be extracted. At the same time, there is a “steaming effect”.
Furthermore, since the jet fluid exiting from the nozzle creates a swirling flow along the inner surface in the horizontal plane of the container, the stirring action is made extremely efficient and promotes the deliciousness of black tea. In addition, the mixed fluid of hot water and steam is prevented from being ejected from the upper opening of the extraction container to the outside as much as possible.
[Brief description of the drawings]
FIG. 1 is a system diagram of an embodiment of the present invention.
FIG. 2 is an enlarged view of a main part of FIG.
FIG. 3 is an enlarged view of a main part of FIG.
[Explanation of symbols]
A Beverage container 1 Extraction container 1a Drain port 1b Filter 1c Packing 1d Coil spring 2 Main frame 2a Stationary seat 2b Discharge port 2c Nut 3 Pouring nozzle 3a Pipe body 3b Spout 4 Nozzle lift 4a Guide tube 4b Mounting ring 4c Drive rod 4d Bar guide 5 Driving means 5a Motor 5b Crank plate 5c Connection link 6 Hot water supply means (hot water boiler)
7 Steam supply means (steam boiler)
8 Pipe system 8a Hot water pipe 8b Hot water branch header 8c Steam pipe 8d Steam branch header 8e Electromagnetic steam cutoff valve 8f Electromagnetic mixing valve 8g Mixing pipe 8h Pressure reducing valve 8i Water supply pipe 9 Discharge part 9a Connection cylinder 9b Discharge valve 9c Discharge nozzle 10 Steam nozzle 11 Steam manual valve

Claims (5)

A discharge cylinder is formed at the bottom of the extraction container, a filter is attached to the inlet of the extraction container, a stationary seat having a discharge port is provided in the main frame, and the extraction cylinder of the extraction container is inserted and placed in the stationary seat. The tea leaves are put into the inside, and then a pouring nozzle having a bent tip is inserted inward from the upper end opening of the extraction container so that the jet fluid swirls along the inner surface of the extraction container. Steam is supplied at a pressure from each boiler, and after a certain period of time, a discharge valve provided below the stationary seat is opened and discharged into a beverage container. 2. The method of extracting tea according to claim 1, wherein when hot water and steam are supplied at a pressure from each boiler, the hot water and steam are mixed before reaching the pouring nozzle. 3. When inserting the pouring nozzle into the extraction container, the pouring outlet of the pouring nozzle is held so as to be positioned above the surface of the hot water in the container. The tea extraction method as described. An extraction container having a filter at the inlet of a discharge tube port formed at the bottom, a main body support for supporting the extraction container, and being movable up and down so as to enter and exit from the upper end opening of the extraction container, A pouring nozzle whose tip is bent so as to swivel along the inner surface, an elevating means for the pouring nozzle, a hot water boiler for supplying hot water to the extraction container, and a steam for supplying steam to the extraction container A black tea extraction apparatus comprising: a boiler; and a stationary seat having a discharge port provided in the main frame so that the discharge tube port of the extraction container is liquid-tightly mounted. The tea extraction device according to claim 4, further comprising a hot water and steam mixing valve provided in front of the pouring nozzle.

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