JP2009125456A - Tea supply method and apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tea supply method and apparatus capable of continuously supplying tea drink having reduced bitterness and astringency, rich taste, flavor with high extraction freshness and excellent water color in a favorite concentration at both of a low temperature and a high temperature, minimizing a mechanical device, improving a heating efficiency, and improving the safety by suppressing proliferation of fungi in liquid extract. <P>SOLUTION: This tea supply apparatus includes an extraction device 1 extracting high-concentration liquid extract 11 with a Brix value of 1.0-4.0% from tea leaves 2 at a low temperature for a long time, a liquid cooler 5 refrigeratingly storing the liquid extract, a quantitative supply device 12 taking out the liquid extract from the liquid cooler and sending it, an instantaneous heating device 6 for instantaneously heating the taken-out liquid extract 11, a high-temperature tea support spout 7 for supplying heated high-temperature liquid tea extract, a low-temperature tea supply spout 9 for supplying the taken-out liquid tea extract at the refrigerated low temperature, a selector valve 13 for changing over the taken-out liquid extract between the high-temperature tea supply spout side and the low-temperature tea supply spout side, a warm water adding device 8 for adding warm water to the high-temperature liquid extract, and a cold water adding device for adding cold water to the low-temperature liquid extract. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a tea supply method and a tea supply apparatus that extract tea from raw materials such as tea leaves and supply tea, and more particularly to a tea supply method and a tea supply apparatus that can supply low temperature tea and high temperature tea.

  Conventionally, a tea supply device has been commercialized, in which tea leaves are extracted at a concentration suitable for drinking with high-temperature hot water for each cup or each cup and directly supplied directly or after temporary storage. .

  In addition, it is also known that when beverages are extracted from raw materials such as coffee powder and tea leaves at high temperatures, the extracted beverages are instantly cooled and stored at low temperatures, and when the stored beverages are served, the beverages are heated to an appropriate temperature with a heating device. It has been. As an example, there is a beverage supply apparatus shown in FIG.

  The beverage supply device of FIG. 10 includes an extraction device 101 that extracts a beverage from raw materials such as tea leaves 106 with hot water 107, an instantaneous cooling device 102 that rapidly cools the beverage extracted by the extraction device 101, and an instantaneous cooling device 102. The cold storage container 103 that keeps the beverage cooled by a predetermined amount cold, and the instantaneous heating device 105 that pumps the beverage from the cold storage container 103 via the pump 104 and rapidly heats the beverage. In addition, an inert gas supply device is connected to the cold storage container 103 in order to prevent alteration of the beverage. The instantaneous heating device 105 includes a heat exchanger including a heat insulating container in which the heating brine heated by the heater circulates and a heating pipe through which the beverage passes, and exchanges heat between the beverage flowing through the heating pipe and the heating brine. Thus, the beverage is heated instantaneously.

In the beverage supply device configured in this way, hot water 107 heated to 85 ° C. is supplied to an extraction device containing raw materials such as tea leaves 106 to extract and extract a plurality of drinks such as Japanese tea. The beverage 108 is rapidly cooled to 4 ° C. by the instantaneous cooling device 102. The rapidly cooled beverage 108 is supplied to the cold container 103 and stored at a temperature of 4 ° C. in the cold container. When the beverage 108 is supplied from the cold storage container 103 to the cup 109, the beverage 108 for one cup 109 is drawn from the cold storage container 103, supplied to the instantaneous heating device 105 via the pump 104, and heated to 70 ° C. for supply. It is supposed to be. Further, in order to avoid alteration of the beverage 108 stored in the cold storage container 103, an inert gas is supplied into the cold storage container 103.
As a document related to the beverage supply apparatus of FIG. 10, there is Patent Document 1 described later.

  Furthermore, a beverage production apparatus for extracting raw materials such as tea leaves at a low temperature is also known. As an example of this, there is a beverage production device shown in FIG.

  The beverage production apparatus in FIG. 11 includes an extraction chamber 201 that produces an beverage 207 by mixing an extract extracted from a beverage raw material 205 such as tea leaves with a liquid 206, and a beverage 207 produced in the beverage raw material 205 and the extraction chamber. From the filtering member 202 to be separated, the storage chamber 203 that communicates with the extraction chamber 201 and stores the beverage 207 separated by the filtering member 202, and the heating means 204 that heats at least one of the extraction chamber 201 and the storage chamber 203. In the extraction chamber 201, the beverage raw material 205 is extracted at a low temperature with a liquid 206 of 60 ° C. or lower, preferably 20 ° C. to 60 ° C., or a liquid of 20 ° C. or lower, preferably 10 ° C. or lower. A low temperature extraction is performed at 206.

In this beverage production apparatus, when supplying a high-temperature beverage, the heating means 204 raises the cold-extracted beverage 207 to a desired temperature and supplies it, and when supplying a low-temperature beverage, the heating means 204 is used. The beverage 207 extracted at low temperature is supplied as it is without being operated.
As a document related to the beverage production device of FIG. 11, there is Patent Document 2 described later.

JP-A-8-89406 JP 2007-75575 A

  The above-mentioned conventional tea leaves extracted with hot hot water in a short period of time are extracted with a large amount of bitter and astringent ingredients such as tannin and caffeine extracted at a high temperature and for a short time, and the balance of taste is lost. In addition, many miscellaneous components that become tea or inhibit the taste of the extract are extracted, which may impair the taste of tea. Moreover, the oxidation of chlorophyll and tannin proceeds at a high temperature, and the original light green light blue may turn brown in a short time.

  In the case of the above-described extraction device that temporarily stores the beverage extracted at high temperature, flavor deterioration due to oxidation or the like may occur during storage.

  In the case of the method of exchanging tea leaves for each cup in the method of extracting every cup as described above, the extraction time is as short as about 30 seconds, so there are enough amino acids such as theanine that takes time to elute with the flavor components of tea. There is a problem that cannot be extracted.

  In the method of extracting a plurality of cups from the same tea leaf batch by the method of extracting for each cup as described above, there is a problem that the density changes between the first cup and the plurality of cups.

  Since the beverage supply apparatus of FIG. 10 described above is extracted with hot hot water, it has the same problems as the high temperature extraction described above, and an instant cooling device is required to store the beverage extracted with hot hot water at a low temperature. This makes the device expensive. Moreover, when supplying a high temperature drink, since the drink extracted at high temperature is rapidly cooled and it heats up with a heating apparatus after that, a temperature change of a drink is large and there exists a possibility that a flavor may be impaired.

  Further, in the case of FIG. 10, if a low temperature beverage is to be supplied, it is necessary to stop the circulation of the heating brine flowing through the heat insulating container of the heat exchanger of the instantaneous heating device or stop the heater. In this state, when a low-temperature beverage flows, the heating brine in the heat insulating container is cooled by the low-temperature beverage. Therefore, when trying to supply a high-temperature beverage continuously following a low-temperature beverage, the heating brine in the insulated container is already cooled, and it takes time to heat the beverage, and it is not heated sufficiently in a short time. There is a fear. Moreover, when supplying a low-temperature drink continuously following a high-temperature drink, the low-temperature drink is heated by the residual heat of the heating brine in the heat insulation container, and there is a possibility that a desired low-temperature drink cannot be supplied. is there. That is, the thing of FIG. 10 is not intending to supply a hot drink and a low temperature drink continuously.

  The beverage production apparatus of FIG. 11 described above is capable of low temperature extraction, but since the heating means is provided in the extraction chamber or the storage chamber, for example, when switching from a high temperature beverage to a low temperature beverage, All hot beverages must be discharged and extracted again, and the hot beverage supply and the cold beverage supply cannot be performed immediately and continuously.

  Furthermore, since all of the above-mentioned conventional products supply the extracted beverage at the same concentration, it is extracted only at a certain low concentration, and the beverage cannot be supplied at a concentration according to the consumer's preference. There was a problem.

  Further, since extraction is performed at a low concentration of Brix value of 0.2 to 0.4% which is a drinking concentration, it is necessary to increase the amount of liquid for extraction, such as an extraction device, a storage container, a heating device, a cooling device, etc. However, there is a problem that it is difficult to make the beverage extraction device and the beverage production device compact in size, the heating temperature raising efficiency of the extract is poor, and the heating time and the heating cost are increased. Moreover, since it is extracted and stored at a low concentration, there is a risk that microorganisms will propagate in the extract. For example, in what is shown in FIG. 10, the inert gas supply apparatus is connected to the cold storage container in order to prevent the quality change of the extract. For this reason, in the thing of FIG. 10, an apparatus becomes complicated, there exists a raise of the operating cost by nitrogen gas cost, and the complexity of gas cylinder replacement | exchange.

  In view of the problems of the prior art described above, the present invention has a bitter and astringent taste and a little umami, and in the case of green tea, it is a favorite concentration excellent in flavor and light blue with high freshness of extraction and vivid green. Tea can be continuously fed at both low and high temperatures in a short time, and the machinery and equipment can be made compact, and the heating efficiency can be increased, preventing the growth of bacteria during refrigerated storage of the extract. It is an object of the present invention to provide a tea supply method and a tea supply device with improved safety.

  A first solution for solving the problems of the present invention is a tea supply method for extracting tea from a raw material such as tea leaves or tea powder and supplying tea as in claim 1 of the claims. Extracting a high concentration and low temperature extract liquid having a Brix value of 1.0 to 4.0% over a long period of time at a low temperature with an extractor, and storing the extracted extract in a liquid cooler; The refrigerated and stored extract is quantified with a constant supply device every time tea is supplied, and the extracted extract is instantaneously heated with an instantaneous heating device to supply tea as a hot extract and the extracted extract. When the high-temperature tea supply is selected, a desired amount of hot water is added to the supplied high-temperature extract liquid. Water with a hot water hydrating device, When-option, the sheet of cold water tea has been cold desired amount extracts hydro by cold water spraying apparatus, lies in the continuously performed so the cold supply tea and the hot supply tea.

  A second solution means for solving the problems of the present invention is a tea supply device for extracting tea from a raw material such as tea leaves or tea powder and supplying tea as in claim 2 of the claims. In addition, an extraction device for extracting a high-concentration and low-temperature extract liquid having a Brix value of 1.0 to 4.0% over a long period of time at a low temperature for raw materials such as tea leaves and tea powder, and refrigerated storage of the extracted extract liquid Liquid cooler, fixed amount supply device for taking out and sending out a fixed amount of extract liquid each time tea is supplied from the liquid cooler, instantaneous heating device for instantaneously heating the extract liquid extracted by the fixed amount supply device, and the instantaneous heating device A high temperature tea outlet for supplying high temperature extract liquid heated at a low temperature, a low temperature tea outlet for supplying the extract extracted by the quantitative supply device at a low temperature, and an extraction extracted by the quantitative supply device Liquid is supplied to either the high temperature teapot side or the low temperature teapot side A switching valve to be switched, a hot water water adding device for adding a desired amount of hot water to the high temperature extract supplied from the high temperature tea outlet, and a low temperature extract supplied from the low temperature tea outlet And a cold water addition apparatus for adding a desired amount of cold water.

  According to these solutions, bitter and astringent ingredients (tannins, cafes) that are slow to dissolve at low temperatures are extracted by extracting tea leaves to a high concentration of Brix value of 1.0 to 4.0% over a long period of time in a low temperature zone. In) and extraction of miscellaneous components as much as possible, while extracting umami components (amino acids such as theanine) having a relatively high elution rate even at low temperatures as much as possible, and suppressing oxidation and browning during extraction at low temperatures, By extracting to a higher concentration, the growth of microorganisms in the extract is suppressed. By storing the extracted high-concentration extract in a refrigerator, oxidation, browning, and microbial growth are suppressed, and a fresh extract can be continuously fed at any time. Further, the high-concentration extract is instantaneously heated by an instantaneous heating device every time tea is supplied, and is supplied in a high temperature range, or is supplied as cold tea at a low temperature. In addition, at the time of tea supply, hot water or cold water can be added to provide a tea in which the concentration of the extract is freely adjusted to a concentration according to taste.

  As embodiments of the above-described solving means, for example, there are the following, and these embodiments can be appropriately selected and implemented.

  The extraction temperature for extracting the extract is 0 to 40 ° C, preferably 5 to 30 ° C. The time for extracting tea leaves is 5 to 90 minutes. The temperature for refrigerated storage of the high concentration extract is 5 to 10 ° C, and the temperature for instantaneously heating the refrigerated extract is 70 to 90 ° C. The temperature of hot water added to the instantaneously heated extract is 70 to 90 ° C, and the temperature of cold water added to the refrigerated extract is 5 to 20 ° C. A high concentration tea beverage may be supplied as it is without adding hot water or cold water. The Brix value may be 1.0 to 4.0%, preferably 1.6 to 4.0%, more preferably 2.8 to 4.0%.

  As an extraction method for extracting tea leaves, a batch extraction method, a continuous extraction method, or the like can be adopted depending on the application.

According to the present invention, bitter and astringent tastes and little umami, and in the case of green tea, the flavor of freshly extracted freshness that retains a vivid green color, and the preferred concentration of tea excellent in light blue, both at low and high temperatures Thus, it becomes possible to continuously supply tea in a short time.
Further, the high-concentration extraction makes it possible to make the mechanical device compact, increase the heating and heating efficiency of the extract, reduce the heating time and heating cost, and reduce the cooling and refrigeration costs of the extract. Furthermore, the growth of bacteria during refrigerated storage of the extract can be suppressed, and safety can be enhanced.

  Hereinafter, embodiments of the tea supply method and the tea supply device of the present invention will be described with reference to FIGS. FIG. 1 shows an embodiment of a basic tea supply method and tea supply apparatus of the present invention. FIG. 2 shows an example of a batch type extraction apparatus used in the present invention, and FIG. 3 shows an example of a continuous extraction apparatus used in the present invention. FIG. 4 shows an embodiment of the liquid cooler or cold water hydrating apparatus of the present invention, and FIG. 5 shows an embodiment of the instantaneous heating apparatus or hot water hydrating apparatus of the present invention.

  An embodiment of the basic tea supply method of the present invention will be described with reference to FIG. First, liquid 3 is added to raw materials such as tea leaves 2 and tea powder, and a high-concentration and low-temperature extract liquid having a Brix value of 1.0 to 4.0% is extracted with the extractor 1 over a long period of time at a low temperature. Subsequently, the extracted extract is refrigerated and stored in the liquid cooler 5. The refrigerated extract 11 is dispensed by the metering feeder 12 every time tea is supplied. The switching valve 13 is used to switch between a high temperature tea supply that instantaneously heats the extracted extract extracted by the instantaneous heating device 6 and supplies tea as a high temperature extract and a low temperature tea supply that supplies the low temperature extract without change. Supply either tea or low temperature tea. Next, when high temperature tea supply is selected, a desired amount of hot water is added to the hot extract liquid supplied by the hot water adding device 8, and when low temperature tea supply is selected, the low temperature tea supply is selected. A desired amount of cold water is added to the extract by the cold water addition apparatus 10. In this way, high temperature tea and low temperature tea can be supplied continuously.

  An embodiment of a tea supply apparatus that implements this tea supply method will be described with reference to FIG. In FIG. 1, a symbol A is a tea supply device housed in a housing B. The tea supply apparatus A basically adds a liquid 3 to a raw material 2 such as tea leaves or tea powder, and a high concentration and low temperature extract 11 having a Brix value of 1.0 to 4.0% over a long period of time at a low temperature. An extractor 1 for extracting the liquid, a solid-liquid separator 4 for separating the raw material from the extract 11 extracted by the extractor 1, a liquid cooler 5 for refrigerated storage of the extract 11 separated by the solid-liquid separator 4, A fixed quantity supply device 12 that takes out and sends out a predetermined amount of extract 11 every time tea is supplied from the liquid cooler 5, an instantaneous heating device 6 that instantaneously heats the extract 11 taken out by the quantitative supply device 12, and an instantaneous heating device 6 The high temperature tea outlet 7 for supplying the heated high temperature extract 11, the low temperature tea outlet 9 for supplying the extract 11 taken out by the fixed amount supply device 12 at a low temperature, and the constant amount supply device 12. Either the extract 11 is on the hot teapot 7 side or the cold teapot 9 side. A switching valve 13 for switching to be supplied to the hot water, a hot water water adding device 8 for adding a desired amount of hot water to the high temperature extract 11 supplied from the high temperature tea supply port 7, and a tea supply from the low temperature tea supply port 9 And a cold water water adding device 10 for adding a desired amount of cold water to the low temperature extract 11. Note that the solid-liquid separator 4 may be omitted when the extraction apparatus 1 can perform solid-liquid separation.

  In the tea supply device A, the extraction device 1 and the liquid cooler 5 are connected by a supply pipe 14, and the solid-liquid separator 4 is disposed in the pipe 14.

  The liquid cooler 5 is provided with a takeout pipe 15 for taking out the extract 11. The take-out pipe 15 is connected via a switching valve 13 to a high temperature tea supply pipe 16 a connected to the instantaneous heating device 6 and a low temperature tea supply pipe 17 connected to the low temperature tea supply port 9. Further, the instantaneous heating device 6 and the high temperature tea supply port 7 are connected by a high temperature tea supply pipe 16b. The fixed amount supply device 12 is disposed between the liquid cooler 5 and the switching valve 13.

  The hot water adding device 8 is connected to the high temperature tea supply pipe 16 b by a hot water pipe 18. Although not shown, the hot water pipe 18 may be directly connected to the high temperature teapot 7. The cold water addition apparatus 10 is connected to a low temperature tea supply pipe 17 by a cold water pipe 19. Although not shown, the cold water pipe 19 may be directly connected to the low temperature teapot 9.

Next, each structure of the tea supply method and the tea supply apparatus A is demonstrated concretely.
The extraction temperature for extracting the tea leaves at a low temperature is 0 to 40 ° C, preferably 5 to 30 ° C. The extraction temperature varies depending on the type of tea leaf. For example, in the case of green tea, deep steamed green tea has a high extraction speed and high extraction efficiency even at low temperatures, so that a desired extract can be efficiently obtained even at about 5 ° C. Even if the extraction temperature is less than 5 ° C, extraction will not be impossible, but the extraction efficiency and extraction speed of tea leaves will also decrease if it is 5 ° C or less, which will affect the prompt provision and cost. Considering that the temperature of the extract 11 refrigerated and stored in the liquid cooler 5 is 5 to 10 ° C., and that the annual minimum temperature of tap water is usually 5 ° C. Is preferred.

  On the contrary, shallow steamed green tea with a slow extraction rate cannot obtain an extract efficiently unless the temperature is set to about 30 to 40 ° C. to promote extraction. If extraction temperature is 40 degrees C or less, there is little bitterness and miscellaneous taste and there is much taste, and in the case of green tea, the extraction liquid excellent in the flavor and light blue with high extraction freshness with which vivid green was hold | maintained can be extracted. When the extraction temperature becomes high, tannin and caffeine, which cause bitterness, are extracted to a high concentration in the extract extracted by the extraction device, resulting in a bitter tea or a miscellaneous taste that inhibits the taste of the extract Many adult classifications are also extracted, and the original taste may be disturbed. Therefore, the extraction temperature is set to 40 ° C. or lower, and in order to extract at a lower temperature, shallow steamed green tea with a low extraction speed can be efficiently extracted even at an extraction temperature of about 30 ° C. Considering that the temperature of the extract 11 to be stored is 5 to 10 ° C. and that the annual maximum temperature of tap water is usually 30 ° C., the temperature is preferably 30 ° C. or lower.

One test result about the elution rate by the difference in extraction temperature of the main 3 components (tannin, amino acid, caffeine) which comprises the taste of tea is shown by a table and a graph in FIGS. FIG. 6 shows the result of the low temperature extraction of the present invention, and FIG. 7 shows the result of the conventional high temperature extraction.
This test method consists of 200 ml of domestic green tea leaves in 200 ml of pure water in two temperature zones of 30 ° C low temperature (low temperature extraction of the present invention) and 85 ° C high temperature (conventional high temperature extraction) for 1 minute each. Extracted for 2, 3, 5, 20, and 60 minutes, tannin content of each extracted water by iron tartrate colorimetry, total amino acid content by ninhydrin colorimetry, and caffeine by high performance liquid chromatography It was measured by.
According to this test result, when extracted at 85 ° C. which is an average extraction temperature of a general tea machine, as shown in FIG. 7, amino acids which are umami components of tea, tannin which is an astringent component It can be seen that all three major components of caffeine, which is a bitter component, elute rapidly in around 2 minutes.
On the other hand, when extracted at a low temperature of 30 ° C. according to the present invention, as shown in FIG. 6, the elution of tannin and caffeine compared to the elution amount and elution rate of amino acids among the three main components constituting the taste. It can be seen that the speed and the amount of elution are suppressed. The low temperature extraction at 30 ° C. can limit elution of tannin and caffeine while extracting amino acids as a whole. Furthermore, the taste of the extract can be adjusted by selecting the elution balance of the main three components having different elution rates depending on the extraction time.

  The liquid 3 supplied to the extraction device 1 for extracting tea leaves usually has a tap water temperature of about 5 to 30 ° C. throughout the year and can be extracted using tap water as it is, but there are seasonal variations. In order to perform extraction at an efficient extraction temperature according to the type of tea leaves, etc., it is preferable to control the extraction device 1 by providing a temperature control means, as will be described later.

  In order to suppress the growth of microorganisms in the extract, the tea leaves 2 are extracted at a high concentration of Brix value of 1.0 to 4.0%. Preferably, it is 1.6 to 4.0%, more preferably 2.8 to 4.0%. In order to extract at such a high concentration, the extraction time in the extraction device 1 is set to 5 to 90 minutes depending on the amount and type of the tea leaves 2. If the extraction time is less than 5 minutes, depending on the type of tea leaves or the extraction temperature, there is a possibility that the high-concentration extract 11 having a Brix value of 1.0 or more cannot be extracted. Even if the extraction time exceeds 90 minutes, a more effective extraction cannot be expected because beneficial components that can be eluted have already been eluted.

Here, the Brix value is a value obtained by measuring the extract with a spectral saccharimeter and is an index indicating the concentration of soluble solids. The Brix value of tea that is usually drunk is as low as 0.2 to 0.4%. It is. As for the correlation between the Brix value and the extraction time, one test result is shown in the table of FIG. The conditions of this test are as follows.
Tea leaves used: Ordinary sencha extract water: Pure water used Tea leaf quantity / extracted water quantity: 100 cc of extracted water for 10 g of tea leaves
Extraction temperature: Water temperature 30 ° C when tea leaves are introduced. Leave at room temperature.
Stirring: Stirring with a glass rod immediately before measurement (immediately before solid-liquid separation) In this test result, the Brix value is 1.0% or more even if the extraction time is less than 5 minutes, but the used tea leaves are ordinary sencha. This is because the extraction temperature was set to 30 ° C., and as described above, if the extraction time is less than 5 minutes, depending on the type and amount of tea leaves or the extraction temperature, a highly concentrated extract with a Brix value of 1.0 or more 11 may not be extracted. For example, 100 cc for 10 g of tea leaves in this test is a setting in which the amount of tea leaves is considerably larger than the amount of extracted water in order to obtain a high Brix value, and at this setting ratio, the fluidity of the tea leaves and the extraction liquid during extraction is considerably poor. It becomes unwieldy. When actually dropping into mechanical extraction, the ratio of tea leaves is reduced a little to increase the mechanical suitability of the liquid being extracted. As a result, the Brix value of the extracted liquid is 1.0 when it is less than 5 minutes. It becomes difficult to exceed.

Next, one test example regarding the Brix value and the propagation of microorganisms is shown in the table of FIG. In this test method, 100 g of domestically produced green tea leaves weighed under aseptic conditions were extracted with 1000 cc of sterile distilled water at 30 ° C for 60 minutes with regular stirring, filtered through tea strainers, and then concentrated at a Brix value of 2.8%. An extract was obtained. A medium concentration group in which the extract was diluted with sterilized distilled water to a Brix value of 1.6% and a low concentration group in which a Brix value of 0.3%, which is a general drinking concentration of green tea, was prepared.
In order to measure the inhibitory action of the extract of each concentration group on the growth of bacteria, Easy QA Ball of Escherichia coli group (Enterobacter Aerogenes): 10,000 cfu / ball (manufactured by Nissui Pharmaceutical Co., Ltd.) in each concentration group of 60 ml One was added to the mixture and allowed to stand at room temperature. Immediately after addition of the fungus, and 3, 6, 9, 12, 18 hours later, 1 ml of the extract of each concentration group was placed in a petri dish, mixed with 20 ml of a standard agar medium kept at 50 ° C., fixed on a plate, and 35 ° Colonies that appeared after culturing for 48 hours at C were counted, and the average value of the measured values on each of the two plates was taken as the bacterial measured value (cfu / ml). Moreover, the extract of each concentration group which does not add a microbe separately was created, and the microbe was measured similarly.
According to this test, in a tea extract having a Brix value of 0.3%, which is a general drinking concentration in tea beverages, etc., the bacteria start to grow around 6 hours after the addition of the bacteria, and then grow rapidly. move on. On the other hand, in the medium concentration extract solution with a Brix value of 1.6%, the growth rate of the bacteria is delayed at the same time as 9 hours later, and at the same time, the growth rate is slow. Furthermore, in the high concentration area with the Brix value of 2.8%, The growth inhibitory effect was noticeable.
From this, it can be seen that by extracting tea to a high concentration, the growth of bacteria in the extract can be suppressed, and safety can be ensured when the extract is stored for a certain period of time.

  As the extraction apparatus 1 for extracting the extract 11 from tea leaves, a batch extraction system, a continuous extraction system, or the like is used depending on the application.

  An example of the batch extraction type extraction device 20 is shown in FIG. The extraction device 20 puts the required amount of tea leaves 2 and liquid 3 in a heat insulating extraction tank 21 that can store a desired amount of tea leaves 2 and liquid 3 at a time, and 5 to 90 in the extraction tank 21 as it is. The extract 11 having a Brix value of 1.0 to 4.0% is extracted over a period of time, and after the extraction is completed, the extract 11 in the extraction tank 21 is used for tea supply. The liquid 3 supplied to the extraction tank 21 is directly supplied to the extraction tank 21 or supplied from a liquid storage tank (not shown) provided in the housing B or extracted from the water pipe depending on the application. It is connected to the tank 21 and supplied. In addition, in order to stir the tea leaves 2 and the extraction liquid 11 in the extraction tank 21 and increase the extraction speed and the extraction efficiency, the stirring means, for example, the rotary stirring blade 30 of the motor drive 31 or a vibration device (not shown). ) Etc. should be provided.

  The bottom of the extraction tank 21 is connected to the solid-liquid separator 4 via a valve 29 provided in the supply pipe 14. The valve 29 is opened when extraction is completed by the extraction device 20, and the extract 11 and the tea leaves 2 in the extraction tank 21 are sent to the solid-liquid separator 4. The valve 29 is an electromagnetic valve, for example, which sets an extraction time with a timer (not shown) or the like. When the timer or the like times the extraction time, the valve 29 is opened in conjunction with the timer or the like, or cooling described later. The circulation of brine should be stopped. Further, when the extraction tank 21 is provided with a low water level sensor (not shown) and the extraction liquid 11 extracted by the extraction device 20 has been supplied to the liquid cooler 5, that is, when the low water level sensor detects a low water level. The valve 29 is closed so that air or residual liquid remaining in the extraction tank 21 does not enter the liquid cooler 5 through the supply pipe 14, and oxidation and browning of the extract 11 stored in the liquid cooler 5. It is good also as a structure which suppresses.

  The extraction tank 21 is provided with a heat exchanger in order to maintain the extraction temperature at 0 to 40 ° C. The heat exchanger is composed of a heat exchange pipe 22. A cooling brine cooled by a refrigerator 23 (not shown) including a compressor, a condenser, a decompression device, and an evaporator circulates in the heat exchange pipe 22. The cooling brine is sent from the refrigerator to the heat exchange pipe 22 via the feed pipe 27 by the pump 24, exchanges heat with the liquid 3 in the extraction tank 21, and then returns to the refrigerator 23 from the return pipe 28. ing. Further, the feed pipe 27 is provided with a flow rate adjustment valve 25 and a heater 26 in order as temperature control means, and the flow rate adjustment valve 25 and the heater 26 are controlled so that the extraction temperature becomes a set temperature.

  In the continuous extraction method, tea leaves and liquid are continuously supplied into an extraction tank equipped with a stirring blade and mixed to extract the extract, and the extracted extract and tea husk are separated and sequentially extracted. FIG. 3 shows an example of the AC continuous extraction device 32 as an example of this extraction device. The extraction device 32 is a horizontally long extraction tank 33 that is gently inclined in the longitudinal direction so that the liquid 3 flows along the inclination, is axially supported in the longitudinal direction in the extraction tank 33, is driven by a motor 35, and is tea leaves And a rotary stirring blade 34 for transferring and stirring 2. The liquid 3 is supplied from the above-described liquid storage tank or connected to the extraction device 32 depending on the application.

  A liquid supply port 37 for supplying the liquid 3 to the extraction tank 33 is provided on the upstream side of the top plate of the extraction tank 33 in the flow direction of the liquid 3, and the tea leaves 2 are extracted on the downstream side of the top plate. A tea leaf supply port 36 for supplying to the tank 33 is provided. The liquid 3 is continuously supplied from the liquid supply port 37 to the extraction tank 33 over a predetermined time by a predetermined amount of the liquid 3 according to the extraction amount and the extraction concentration by a flow control valve (not shown). And flows from the upstream side of the extraction tank 33 to the downstream side. On the other hand, the tea leaf 2 is also continuously fed from the tea leaf supply port 36 to the extraction tank 33 via a conveyor (not shown) or the like over a predetermined amount of time by a flow rate control valve (not shown) or the like. Supplied with. The supplied tea leaves 2 are transferred from the downstream side to the upstream side of the extraction tank 33 while being stirred by the rotary stirring blade 34, and the Brix value of 1.0 to 4 is mixed and mixed with the liquid 3 flowing from the upstream side. 0% of the extract 11 is extracted.

  The extraction device 32 sets the extraction time with a timer (not shown) or the like, and when the timer or the like times the completion of the extraction time, the operation may be stopped or the circulation of the cooling brine described later may be stopped. . In addition, the flow rate adjusting valve for adjusting the flow rate of the tea leaves 2 and the liquid 3 described above may be opened and closed in conjunction with the operation of the extraction device 32. Further, the supply pipe 14 is provided with a valve (not shown) similar to the valve 29 described above. When the extraction device 32 is operated, the valve is opened, and the extract 11 extracted by the extraction device 32 is used as a liquid cooler. 5, for example, when it is detected that the extraction by the extraction device 32 is completed, this valve is closed, and air or residual liquid remaining in the extraction tank 33 is supplied to the liquid cooler 5 through the supply pipe 14. It is also possible to prevent oxidation and browning of the extract 11 stored in the liquid cooler 5. In the case of this AC type extraction device, the angle of the extraction tank 33 may be adjusted as one method for adjusting the extraction speed and the extraction concentration. Increasing the angle of the extraction tank 33 increases the speed of the extraction liquid 11 flowing downstream, shortens the extraction time, and conversely increases the extraction concentration.

  Further, at the upstream end of the extraction tank 33, there is provided a tea cup outlet 39 for taking out the tea cup 4 'after the extraction liquid 11 is extracted, and the extracted extract 11 is provided at the bottom downstream side of the extraction tank 33. An extraction liquid extraction port 38 for extraction is provided. The extraction liquid outlet 38 is connected to the supply pipe 14, and the extraction liquid 11 extracted by the extraction device 32 is sequentially and continuously supplied to the liquid cooler 5.

  At the bottom of the extraction tank 33, a heat transfer plate 40 is provided along the rotary stirring blade 34 in order to maintain the extraction temperature at 0 to 40 ° C. A cooling passage 41 is provided inside the heat transfer board 40, and cooling brine cooled by a refrigerator 42 configured in the same manner as the refrigerator 23 described above passes through a feed pipe 46 by a pump 43. It is sent to the cooling passage 41 of the heat transfer plate 40, where it exchanges heat with the extract 11 in the extraction tank 33, and then returns to the refrigerator 42 from the return pipe 47. Further, the feed pipe 46 is sequentially provided with a flow rate adjusting valve 44 and a heater 45 as temperature control means, and the flow rate adjusting valve 44 and the heater 45 are controlled so that the extraction temperature becomes a set temperature. (No. 48-49 number)

  The solid-liquid separator 4 includes a filter, and when the solid-liquid separation is completed, the tea cup 4 'is discharged to the outside manually or automatically.

  The liquid cooler 5 refrigerates the extract 11 at a temperature of 5 to 10 ° C. so that the extracted extract 11 is not oxidized, browned, or propagates microorganisms. As shown, a heat insulating container 50 having a size capable of storing the extracted extract 11 and a heat exchanger provided in the heat insulating container 50 and including a cooling pipe 51 are provided. Further, if the heat insulation container 50 is provided with a high water level sensor and a low water level sensor, and the high water level sensor detects the high water level, the valve 29 described above is closed to prevent the extract 11 from overflowing from the liquid cooler 5. Can be prevented. In addition, when the low water level sensor detects a low water level, an alarm is issued or displayed so that the liquid cooler 5 is empty.

  In FIG. 4, cooling brine cooled by a refrigerator 52 configured in the same manner as the above-described refrigerator 23 circulates in the cooling pipe 51. The cooling brine cooled by the refrigerator 52 is sent to the cooling pipe 51 through the feed pipes 56 and 56 a by the pump 53, and after cooling the extract 11 of the liquid cooler 5, the cooling brine is frozen through the return pipe 57. It returns to the machine 52. When the extraction liquid 11 is set to a desired specific temperature within 5 to 10 ° C., the flow control valve 54 and the heater 55 are provided as temperature control means in the feed pipe 56a, and the flow control valve 54 and the heater 55 are provided. It is good to control so that the extract 11 may become preset temperature. (Symbol 58, 59 missing)

  The fixed amount supply device 12 is a device that takes out a predetermined amount of the extract 11 stored in the liquid cooler 5 and sends it out each time tea is supplied, and can be constituted by a fixed amount pump, for example. For example, the fixed amount supply device 12 is configured to send out a desired extract 11 while operating a switch (not shown), or to send a certain amount of extract 11 when the switch is operated. it can. When the high temperature tea is selected, the selector pipe 13 communicates with the high temperature tea supply pipe 16a, and when the low temperature tea is selected, the take out pipe 15 communicates with the low temperature tea supply pipe 17. For example, it can be configured as an electromagnetic switching valve. The fixed amount supply device 12 and the switching valve 13 are preferably operated in conjunction with an operation of high temperature tea supply or low temperature tea supply, for example, selection operation of a high temperature tea supply / low temperature tea supply selection switch.

  The instantaneous heating device 6 instantaneously heats the extract 11 taken out from the liquid cooler 5 each time tea is supplied to 70 to 90 ° C. suitable for high temperature tea supply. As shown in FIG. And a heat exchanger. The heater 60 includes a heater (not shown) and heats the heating brine. The heat exchanger includes a heat insulating container 61 through which heating brine circulates and a heating pipe 62 through which the extract 11 passes.

  The heating brine heated by the heater is sent to the heat insulating container 61 through the feed pipes 65 and 65a by the pump 63, and returns from the heat insulating container 61 to the heater 60 through the return pipe 66. On the other hand, the extract 11 sent out from the fixed amount supply device 12 is sent from the high temperature tea supply pipe 16a to the heating pipe 62 and instantaneously exchanges heat with the heating brine in the heat insulating container 61 to become a high temperature. It is sent to the tea supply pipe 16b. When the extraction liquid 11 is set to a desired specific temperature within 70 to 90 ° C., a flow rate adjusting valve 64 is provided as a temperature control means in the feed pipe 65a so that the extraction liquid 11 reaches a set temperature. It is good to control.

  The hot water hydrating device 8 hydrates 70-90 ° C. hot water into the high temperature extract 11 fed from the high temperature tea spout 7. Depending on the application, the hot water storage method or the instantaneous heating method shown in FIG. Adopted.

  The hot water storage system includes a heat insulating hot water container (not shown) provided in the casing B, a heater (not shown) provided in the hot water container, and a variable quantitative supply means similar to the variable quantitative supply means 70 described later. (Not shown). In this method, the hot water heated and stored in the hot water container is taken out each time tea is supplied by the variable quantitative supply means, and the hot and high-concentration extract liquid supplied from the high temperature tea outlet 7 through the hot water pipe 18. 11 is added to the water. The heating brine flowing through the heater is heated by the same means as the heating brine of the instantaneous heating means 67 described later. The water stored in the hot water container may be supplied from the liquid storage tank described above or connected to a water pipe in addition to being directly charged.

  The instantaneous heating method shown in FIG. 5 includes instantaneous heating means 67 and variable quantitative supply means 70. The water from the water pipe and the water in the liquid storage tank described above pass through the variable quantitative supply means 70 and the instantaneous heating means 67 in order, and a desired amount is heated and sent to the hot water pipe 18. The instantaneous heating means 67 includes a heater 60 and a heat exchanger similar to the instantaneous heating device 6. The heat exchanger includes a heat insulating container 68 through which heated heating brine circulates, and a heating pipe 69 provided in the heat insulating container 68 through which water passes.

  The heating brine heated by the heater 60 is sent by the pump 63 to the heat insulating container 68 through the feed pipes 65 and 65b, and is returned from the heat insulating container 68 to the heater 60 through the return pipe 66. . On the other hand, the water sent out from the quantitative supply means 70 every time the tea is supplied is sent to the heating pipe 69 and instantly exchanges heat with the heating brine in the heat insulating container 68 to become hot water, which is sent to the hot water pipe 18. It is done. When setting warm water to desired specific temperature within 70-90 degreeC, it is good to provide the flow control valve 71 as a temperature control means in the feed pipe 65b, and to control hot water so that it may become preset temperature.

  The variable quantitative supply means used in the hot water adding device 8 is constituted by, for example, a variable quantitative pump or the like, and supplies a desired amount of hot water according to the consumer's preference. For example, while operating a hot water switch (not shown), supply desired hot water, or provide a hot water switch (not shown) of large quantity, medium quantity, small quantity, etc. Accordingly, a desired amount of hot water may be supplied. In addition, when a hot water switch is operated, a predetermined amount of hot water may be supplied.

  The chilled water adding device 10 hydrates 5 to 20 ° C. chilled water to the low-temperature extract supplied from the low-temperature teapot 9, and the cold water storage method or the instantaneous cooling method shown in FIG. 4 is adopted depending on the application. Is done.

  The cold water storage system includes a heat insulating cold water container (not shown) provided in the housing B, a cooler (not shown) provided in the cold water container, and a variable quantitative supply similar to the variable quantitative supply means 75 described later. Means (not shown). In this system, the cold water stored in the cold water container is taken out each time tea is supplied by the variable quantitative supply means, and the low temperature and high concentration extract liquid supplied from the low temperature tea outlet 9 through the cold water pipe 19 is supplied. To be added to the water. The cooling brine flowing through the cooler is cooled by the same means as the cooling brine of the instantaneous cooling means 72 described later. The water stored in the cold water container may be supplied from the above-described liquid storage tank or connected to a water pipe in addition to being directly charged.

  The instantaneous cooling method shown in FIG. 4 includes an instantaneous cooling means 72 and a variable quantitative supply means 75. Tap water or water from the liquid storage tank described above passes through the variable quantitative supply means 75 and the instantaneous cooling means 72 in order, and a desired amount is cooled and sent to the cold water pipe 19. The instantaneous cooling means 72 includes a refrigerator 52 and a heat exchanger. The refrigerator 52 is configured in the same manner as the refrigerator 23 and cools the cooling brine. The heat exchanger includes a heat insulating container 73 through which cooling brine circulates and a cooling pipe 74 that is built in the heat insulating container 73 and through which water passes.

  The cooling brine cooled by the refrigerator 52 is sent to the heat insulating container 73 through the feed pipes 56 and 56b by the pump 53, and returns from the heat insulating container 73 to the refrigerator 52 through the return pipe 57. . On the other hand, the water sent out from the variable quantitative supply means 75 each time tea is supplied is sent to the cooling pipe 74, and instantly exchanges heat with the cooling brine in the heat insulating container 73 to form cold water, which is supplied to the cold water pipe 19. Sent. When the chilled water is set to a desired specific temperature within the range of 5 to 20 ° C., a flow rate control valve 76 and a heater 77 are sequentially provided as temperature control means in the feed pipe 56b. It is good to control so that cold water may become preset temperature with the heater 77. FIG.

  The variable quantitative supply means 75 of the cooling water adding apparatus 10 is composed of, for example, a variable quantitative pump or the like, and supplies a desired amount of cold water according to consumers' preference. For example, while operating a chilled water switch (not shown), supply chilled water, or provide a chilled water switch (not shown) of large quantity, medium quantity, small quantity, etc., depending on the operation of these switches A desired amount of cold water may be supplied. Further, when a cold water switch is operated, a predetermined amount of cold water may be supplied.

  When the liquid storage tank described above is provided, the number of extractions in the extraction device 1 and when supplying liquid from the liquid storage tank to the hot water hydration device 8 and the cold water hydration device 10, the liquid storage is taken into consideration. The tank capacity is determined.

  When tap water is used as the water supplied to the liquid storage tank, the extraction device 1, the hot water hydrating device 8, the cold water hydrating device 10 or the like, the tap water may be used as it is, but it is purified by the water purifier. It is good to keep. When water is stored in a liquid storage tank, hot water container, or cold water container, mineral water or the like can be used in addition to tap water.

  The refrigerators used in the extraction device 1, the liquid cooler 5, and the cold water adding device 10 may be provided separately, but may be shared with the refrigerator 52 of the liquid cooler 5. Similarly, the heaters used in the instantaneous heating device 6 and the hot water adding device 8 may be provided separately, but may be shared with the heater 60 of the instantaneous heating device 6. If a refrigerator or a heater is shared, the structure is simplified, which is advantageous in terms of cost. Moreover, in order to ensure the quantity of the cooling brine and the heating brine between each refrigerator 23,42,52 and each pump 24,43,53 and between the heater 60 and the pump 63, it is a cooling brine. Alternatively, a buffer tank (not shown) made of a heat insulating container for storing heating brine may be provided.

The tea supply device of the embodiment configured as described above operates as follows when the cooling method of FIG. 4 or the heating method of FIG. 5 is adopted.
Refrigerators, pumps, and heaters such as the extraction device 1, the liquid cooler 5, and the cold water hydration device 10 are operated in advance to circulate the cooling brine, and the instantaneous heating device 6 and the hot water hydration device 8 are heated. Operate the machine and pump to circulate the heating brine.

  Next, the tea leaves 2 and the liquid 3 are supplied to the extraction device 1, and a high-concentration extract 11 having a Brix value of 1.0 to 4.0% is extracted at a low temperature of 5 to 40 ° C. This extract 11 is separated from the tea husk 4 ′ by the solid-liquid separator 4, sent to the liquid cooler 5, and refrigerated at 5 to 10 ° C. in the liquid cooler 5.

  When the chilled and stored high-concentration extract 11 is fed at a high temperature, for example, by operating the hot tea / cold tea selection switch, the switching valve 13 and the liquid cooler 5 and the hot tea supply are operated. While switching so that the port 7 may communicate, the variable fixed quantity supply device 12 operates. The variable fixed amount supply device 12 takes out a certain amount of the extract 11 from the liquid cooler 5 every time tea is supplied, and the taken out extract 11 sequentially passes through the take-out pipe 15, the switching valve 13, and the high-temperature tea supply pipe 16a. It is sent to the heating pipe 62 of the instantaneous heating device 6.

  The extract 11 sent to the heating pipe 62 is heated to 70 to 90 ° C. by instantaneously exchanging heat with the heating brine in the heat insulating container 61 of the instantaneous heating device 6. The heated extract 11 is supplied as high-temperature and high-concentration tea from the high-temperature tea outlet 7 through the high-temperature tea supply pipe 16b.

  At this time, when a high-temperature and low-concentration tea is desired, the hot water switch of the hot water water adding device 8 is operated. By this operation, the variable quantitative supply means 70 of the hot water adding device 8 is activated, and a desired amount of water set by the variable quantitative supply means 70 is supplied from the water pipe or the liquid storage tank to the heating pipe of the instantaneous heating means 67. 69. The water sent to the heating pipe 69 instantaneously exchanges heat with the heating brine in the heat insulating container 68 to become hot water of 70 to 90 ° C. The hot water is hydrated to the high-concentration extract 11 that is fed at a high temperature via the hot water pipe 18. As a result, it is served as a tea having a high temperature and a concentration according to taste.

  When the chilled and stored high-concentration extract 11 is supplied at a low temperature, for example, by operating the low temperature tea selection switch of the high temperature tea / low temperature tea selection switch, the changeover valve 13 causes the liquid cooler 5 to operate. And the low temperature teapot 9 are switched so as to communicate with each other, and the quantitative supply device 12 is operated. The fixed amount supply device 12 takes out a certain amount of the extract 11 from the liquid cooler 5 every time tea is supplied. The extracted liquid 11 is supplied as low-temperature and high-concentration tea from the low-temperature tea outlet 9 through the extraction pipe 15, the switching valve 13 and the low-temperature tea supply pipe 17.

  At this time, when a low temperature and low concentration tea is desired, the cold water switch of the cold water addition apparatus 10 is operated. By this operation, the variable quantitative supply means 75 of the cold water adding device 10 is operated, and a desired amount of water set by the variable quantitative supply means 75 is sent to the cooling pipe 74 of the instantaneous cooling means 72. The water sent to the cooling pipe 74 is instantly heat-exchanged with the cooling brine circulating in the heat insulating container 73 to become cold water of 5 to 20 ° C. The cold water is added to the high-concentration extract 11 supplied at low temperature via the cold water pipe 19. As a result, it is served as a tea at a low temperature and according to taste.

  According to the tea supply method and the tea supply apparatus of the embodiment configured as described above, although not described in detail in order to avoid duplication, the same operations and effects as described in the above paragraphs 0022 and 0026 are exhibited. Have the following advantages.

  Without hydrating the high-concentration extract 11 without adding water, mixing it with alcoholic beverages to make a tea split or mixing it with fruit juice or other types of tea, etc., without diluting the other party ’s beverage You can enjoy a tea blend drink.

Moreover, if a hot water hydration apparatus and a cold water hydration apparatus can be operated independently, it can also be used as a hot water / cold water supply apparatus.
Furthermore, since a high temperature dedicated hot tea outlet 7 and a low temperature dedicated low temperature tea outlet 9 are provided, a high temperature supply can be obtained by setting cups in both the high temperature tea outlet 7 and the low temperature tea outlet 9. Tea and low temperature tea can be performed continuously. For example, hot water is supplied at the high temperature tea outlet 7 and cold water is supplied at the low temperature tea outlet 9 or low temperature tea is supplied at the low temperature tea outlet 9 and hot water is supplied at the high temperature tea outlet 7. Can be used in various ways.

  Further, the switching valve 13 is provided in the take-out pipe 15, and the extract 11 is switched and supplied to the high temperature tea supply pipe 16a and the low temperature tea supply pipe 17 via the switch valve 13, respectively. While simplifying, high temperature tea supply and low temperature tea supply can be performed continuously, and the piping structure can be configured with simple parts.

  The operation of the extraction device 1 is controlled by a timer or the like, and the pumps 24 and 43 and the valve 29 provided in the supply pipe 14 are operated in conjunction with the operation of the extraction device 1 to extract and extract the extract 11. The operation of supplying the liquid 11 to the liquid cooler 5 can be automatically performed, and even if extraction is performed for a long time, there is no need for a person to monitor by the side, and a tea supply device that is easy to use can be obtained. it can.

  If the liquid storage tank described above is provided, the tea supply device can be installed in a place where a water pipe cannot be directly connected. Furthermore, if the hot water storage system or the cold water storage system is adopted for the hot water water adding device 8 or the cold water water adding device 10, the temperature of the supplied hot water or cold water can be always kept constant with a simple structure. If the water or cold water switch is configured to supply hot water or cold water while operating the switch, or supply hot water or cold water of a large amount, medium amount, small amount, etc., it is always hot water at a constant temperature. And cold water can be supplied. Further, if the instantaneous heating method or the instantaneous cooling method is adopted in the hot water adding device 8 or the cold water adding device 10, the amount of heating brine or cooling brine flowing through the instantaneous heating means 67 or the instantaneous cooling means can be reduced, and the heating machine The load of 60, the refrigerator 52, etc. can be made small, and a heat exchanger can be comprised compactly.

  If the temperature of the cooling brine is controlled by the flow rate adjusting valve and the heater, and the temperature of the heating brine is controlled by the flow rate adjusting valve, the temperature control is easy and fine temperature setting is possible. Therefore, the extraction temperature according to the kind of tea leaf can be set, the temperature of the extract to be refrigerated and the temperature of hot water or cold water to be added can be set to a desired temperature.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various design changes are possible. Further, the present invention can be applied to beverages such as oolong tea without being limited to green tea extraction and tea supply. Furthermore, the extraction device 1 is not limited to the illustrated extraction device 20 or the extraction device 32, but may be any device that can extract a low-temperature and high-concentration extract. The hot water hydrating device 8 and the cold water hydrating device 10 are not limited to those shown in the drawings, and may be any devices that can hydrate hot water or cold water.

The figure which shows one Embodiment of the tea supply apparatus and tea supply method of this invention. The figure which shows one Embodiment of the extraction apparatus of the batch extraction system of this invention. The figure which shows one Embodiment of the alternating current type continuous extraction apparatus of this invention The figure which shows one Embodiment of the cooler for liquids of this invention, or a cold water adding apparatus. The figure which shows one Embodiment of the instantaneous heating apparatus and warm water hydration apparatus of this invention. Results of test examples on elution rates of three main components in low temperature extraction at 30 ° C Results of test examples on elution rates of three main components in high temperature extraction at 85 ° C Test results for extraction time and Brix value Results of tests on Brix values and microbial growth The figure which shows the conventional tea supply equipment The figure which shows other conventional tea supply equipment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Extraction device 2 ... Tea leaf 3 ... Liquid 4 ... Solid-liquid separator 5 ... Liquid cooler 6 ...・ ・ ・ Instant heating device 7 ··· High temperature tea spout 8 ··· Hot water adding device 9 ··· Low temperature pouring port 10 ··· Cold water adding device 11 ··· ... Extract 20 ... Batch extraction type extraction device 21 ... Extraction tank 22 ... Cooling pipe 23 ... Refrigerator 32 ... AC type continuous Extractor 33 ... Extraction tank 34 ... Rotary stirring blade 40 ... Heat transfer plate 42 ... Refrigerator 50 ... Insulated container 51 ... Cooling pipe 52... Refrigerator 60... Heater 61 .. heat insulation container 62... Heating pipe 67. Container 69 ... Heating pipe 70 ----- variable dispenser means 72 ----- instantaneous cooling means 73 ----- insulated container 74 ----- cooling pipe 75 ----- variable dispenser means

Claims (2)

A tea supply method in which an extract is extracted from a raw material such as tea leaves or tea powder and then supplied, and the raw material is extracted at a high concentration and low temperature with a Brix value of 1.0 to 4.0% over a long period of time at a low temperature. The liquid is extracted by an extractor, the extracted extract is refrigerated and stored in a liquid cooler, and the refrigerated extract is quantified by a quantitative supply device every time tea is supplied, and the extracted extract is instantly heated. The high-temperature tea supply that is instantaneously heated and supplied as a high-temperature extract liquid and the low-temperature tea supply that supplies the extracted extract liquid as the extract liquid at a low temperature are selectively switched by a switching valve, and the high-temperature supply When tea is selected, a desired amount of hot water is added to the supplied hot extract by a hot water adding device, and when the low temperature tea is selected, the tea is supplied to the lower temperature extract. Add the desired amount of cold water by means of a cold water addition device And water, the tea supply method being characterized in that the said cold supply tea and the hot feed tea continuously performed so. A tea supply device that extracts tea from raw materials such as tea leaves and tea powder and supplies tea, the tea supply device using raw materials such as tea leaves and tea powder at a low temperature for a long time and having a Brix value of 1.0 to An extraction device for extracting 4.0% high-concentration and low-temperature extract, a liquid cooler for refrigerated storage of the extracted extract, and a predetermined amount of extract extracted from the liquid cooler for each tea supply A fixed amount supply device, an instantaneous heating device that instantaneously heats the extract taken out by the constant amount supply device, a high temperature tea outlet that supplies hot extract liquid heated by the instantaneous heating device, and the constant amount supply device A low temperature tea outlet that supplies the extracted liquid extracted at the low temperature, and the extracted liquid extracted by the quantitative supply device is supplied to either the high temperature tea outlet side or the low temperature tea outlet side. A switching valve that switches so that the high temperature It is composed of a hot water hydrating device that hydrates a desired amount of hot water into the effluent, and a cold water hydrating device that hydrates a desired amount of cold water into the low-temperature extract fed from the low-temperature tea outlet. A tea supply device.

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