JP2004038446A - Extractor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an extractor 11 capable of reducing the time to obtain an extract by sufficiently stirring coffee powder and hot water in a mixing container 12 in a short time. <P>SOLUTION: A nozzle is provided on a side of the mixing chamber 19 of the mixing container 12. Hot water is pressurized and fed by a pressure pump 36. The hot water pressurized is poured from the nozzle of the mixing container 12 into the mixing chamber 19 to stir and admix coffee powder and the hot water. The coffee solution is extracted from the mixing chamber 19 of the mixing chamber 12 through a filter 45. Because the hot water pressurized is poured into the mixing chamber 19 to stir and admix the coffee powder and the hot water, the coffee powder and the hot water can be sufficiently stirred in a short time to reduce the time required to extract the coffee solution. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an extraction device for extracting an extract by mixing a raw material and hot water.
[0002]
[Prior art]
Conventionally, in a cup-type beverage vending machine that provides and sells beverages in cups, in the case of beverages using coffee bean raw materials, a predetermined amount of coffee beans is fed from a raw material supply device that stores coffee beans, and the fed coffee beans are fed. Milled, put the ground coffee powder and the hot water discharged from the hot water tank from the upper part of the mixing vessel and mix them, raise the piston of the extraction cylinder arranged through the filter at the lower part of the mixing vessel, and raise the filter. Air is fed into the mixing container through which the coffee powder and hot water are stirred, and after a certain steaming time, the piston of the extraction cylinder is lowered to extract the coffee liquid in the mixing container through the filter, and the coffee extracted into the extraction cylinder. The liquid is introduced into the cup and poured.
[0003]
However, the supply of hot water from the hot water tank to the mixing container utilizes the head between the tapping portion of the hot water tank and the mixing container, so that it takes a long time to supply the hot water. Also, in order to stir the coffee powder and hot water, the piston of the extraction cylinder is raised and air is sent into the mixing container through the filter, but this alone cannot sufficiently stir the coffee powder and hot water. , Need constant steaming time. In addition, since the head is used to guide the coffee liquid from the extraction cylinder to the cup and inject the coffee liquid into the cup, it takes time to extract the coffee liquid. For this reason, the extraction of regular coffee takes time.
[0004]
Further, as described in Japanese Patent Publication No. 5-31413, for example, after coffee powder and hot water are put in a mixing container, pressurized air pressurized by a pump is applied to a lower portion of the mixing container. The coffee powder and the hot water can be sufficiently stirred by the bubbles rising in the hot water, and the extraction time can be shortened.
[0005]
However, since a large amount of air from the outside comes into contact with the coffee liquid, flavors such as aroma and taste of the coffee liquid are impaired, and the temperature of the coffee liquid is lowered by being cooled by air.
[0006]
[Problems to be solved by the invention]
As described above, conventionally, there is a problem that it takes time to extract regular coffee.
[0007]
Further, as described in Japanese Patent Publication No. 5-31413, when pressurized air is sent from the outside to the mixing container to shorten the extraction time, there is a problem that the flavor and temperature of the coffee liquid are impaired.
[0008]
The present invention has been made in view of the above circumstances, and has as its object to provide an extraction apparatus that can sufficiently stir a raw material and hot water in a mixing container in a short time and shorten the extraction time of an extract. .
[0009]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided an extraction apparatus comprising: a mixing chamber for mixing a raw material and hot water; a mixing container having a nozzle communicating with the mixing chamber; a raw material supply means for supplying the raw material to the mixing container; A hot water supply means for discharging the pressurized hot water from the nozzle of the mixing container into the mixing chamber to stir and mix the raw material and the hot water, and a filter, and the mixing container And an extracting means for extracting an extract obtained by mixing the raw material and the hot water from the mixing chamber.
[0010]
In this configuration, since the pressurized hot water is discharged from the nozzle of the mixing container into the mixing chamber to mix and mix the raw material and the hot water, the raw material and the hot water are sufficiently stirred in the mixing container in a short time, and the extraction is performed. The liquid extraction time is reduced.
[0011]
According to a second aspect of the present invention, in the extraction apparatus according to the first aspect, the mixing chamber of the mixing vessel has a substantially rectangular cross section in a horizontal direction, and the nozzle of the mixing vessel is provided at one corner of the mixing chamber. , And are provided so as to face corners located diagonally to the corners.
[0012]
In this configuration, since the nozzle of the mixing vessel is provided at one corner of the mixing chamber having a substantially rectangular cross section in the horizontal direction, the nozzle is opposed to the corner located diagonally to this corner. The hot water discharged from the nozzle is dispersed along the inner wall surfaces on both sides adjacent to the corner and spreads over the entire mixing chamber, so that the stirring effect is improved.
[0013]
According to a third aspect of the present invention, in the extraction apparatus according to the first or second aspect, the nozzle of the mixing vessel is inclined downward toward the lower side of the mixing chamber.
[0014]
In this configuration, since the nozzle of the mixing vessel is provided to be inclined downward toward the lower side of the mixing chamber, the hot water discharged from the nozzle flows from the lower part of the mixing chamber to the upper part of the mixing chamber through the inner surface of the mixing chamber opposed thereto. , A vertical circulating flow is generated in the mixing chamber, and the stirring effect is improved.
[0015]
According to a fourth aspect of the present invention, in the extraction apparatus according to any one of the first to third aspects, the nozzle of the mixing vessel is formed with a tapered nozzle hole whose cross-sectional area decreases toward the mixing chamber. Is what it is.
[0016]
In this configuration, since the nozzle hole of the nozzle of the mixing container is formed in a tapered shape having a smaller cross-sectional area toward the mixing chamber side, the nozzle hole is squeezed without impairing the flow of the hot water and the discharge force of the hot water is reduced. And the material in the mixing chamber is prevented from entering the nozzle hole.
[0017]
According to a fifth aspect of the present invention, there is provided the extraction apparatus according to any one of the first to fourth aspects, wherein the mixing container has a receiving portion for receiving a raw material at an upper portion of the mixing chamber, and supplies hot water to the receiving portion of the mixing container. And a second hot water supply means.
[0018]
In this configuration, since the hot water is supplied from the second hot water supply means to the receiving portion for receiving the raw material in the upper portion of the mixing chamber, a predetermined amount of hot water is supplied in a short time in accordance with the supply of hot water from the nozzle of the hot water supply means. While being supplied, the raw material attached to the receiving part is poured into the mixing chamber.
[0019]
According to a sixth aspect of the present invention, in the extraction apparatus according to any one of the first to fifth aspects, the hot water supply means includes a hot water tank, a hot water supply path from the hot water tank to the mixing vessel via a pressure pump, and hot water. It has valve means for supplying a predetermined amount of hot water from a tank to a hot water supply path.
[0020]
In this configuration, a predetermined amount of hot water is supplied from the hot water tank to the hot water supply path by the valve means of the hot water supply means, and the hot water supplied to the hot water supply path is sent to the mixing container by the pressurizing pump. Hot water is supplied reliably.
[0021]
According to a seventh aspect of the present invention, in the extraction apparatus according to any one of the first to sixth aspects, the hot water supply means temporarily drives the pressurizing pump during the extraction operation by the extraction means, and the extraction liquid in the mixing chamber is discharged from the nozzle. The temporary drive of the pressurizing pump is stopped in a state in which it is lowered.
[0022]
In this configuration, the hot water supply means temporarily drives the pressurizing pump during the extracting operation by the extracting means and stops the temporary driving of the pressurizing pump in a state where the extract in the mixing chamber is descending from the nozzle. Then, the extract, the raw material, and the like that have flowed back into the nozzle are discharged from the nozzle.
[0023]
According to an eighth aspect of the present invention, in the extraction apparatus according to any one of the first to seventh aspects, the hot water supply means varies the number of revolutions of the pressurizing pump according to the type of the extract.
[0024]
In this configuration, the hot water supply means varies the discharge pressure of the hot water discharged into the mixing chamber of the mixing container by adjusting the rotation speed of the pressurizing pump in accordance with the type of the extract to adjust the stirring effect. As a result, the extraction concentration is adjusted to an optimal concentration corresponding to the type of the extract.
[0025]
According to a ninth aspect of the present invention, in the extraction device according to the eighth aspect, the pressurizing pump has a pressurizing motor whose rotation speed is variable in accordance with the energizing rate, and the energizing rate for the pressurizing motor is variable. And means for varying the duty ratio of the pressurizing motor.
[0026]
In this configuration, by varying the duty ratio of the pressurizing motor, the variable control of the pressurizing pump is facilitated.
[0027]
An extractor according to a tenth aspect is the extractor according to any one of the first to ninth aspects, wherein an extract delivery path for delivering the extract extracted by the extraction means, and an extract delivery provided in the extract delivery path. It is provided with an extract sending means having a sending pump for sending the extract in the path.
[0028]
In this configuration, since the extract extracted by the extractor is sent by the delivery pump by the extractant sending means, the extract is sent in a shorter time than in the case where the extract is sent using a head, and the extraction of the extract is performed. Time is reduced.
[0029]
According to an eleventh aspect of the present invention, in the extraction device according to the tenth aspect, the extraction liquid sending means is configured such that at least the extraction end point of the extraction liquid in the extraction liquid delivery path is at least relative to the rotation speed of the delivery pump at the start of operation. The rotation speed of the delivery pump is reduced.
[0030]
In this configuration, the extraction liquid sending means reduces the rotation speed of the delivery pump at the end of the delivery of the extract in the extraction solution delivery path at least with respect to the rotation speed of the delivery pump at the start of the operation. At the end of the liquid, the air is sent by the delivery pump to prevent the extract from being splashed with the air at the outlet of the extract delivery path and scattered around, and also prevent the extract from foaming.
[0031]
According to a twelfth aspect of the present invention, in the extraction apparatus according to the eleventh aspect, the extraction liquid sending means gradually reduces the rotation speed of the delivery pump between the start and the stop of the operation of the delivery pump.
[0032]
In this configuration, the extraction liquid sending means gradually reduces the rotation speed of the delivery pump between the start of the operation and the stop of the operation of the delivery pump. At the end of the delivery of the extracted liquid, the rotation speed of the delivery pump is surely reduced.
[0033]
According to a thirteenth aspect of the present invention, in the extraction device according to the twelfth aspect, the delivery pump has a delivery motor whose rotation speed varies according to the duty factor, and varies the duty factor with respect to the delivery motor. The transmission motor has a duty ratio varying means.
[0034]
In this configuration, by varying the duty ratio of the delivery motor, variable control of the delivery pump is facilitated.
[0035]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0036]
FIG. 1 shows an extraction device. The extraction device 11 extracts regular coffee using coffee beans as a raw material, and is installed in the body of a cup-type beverage vending machine that supplies and sells a beverage to a cup C. You.
[0037]
The extraction device 11 includes a mixing container 12, a raw material supply unit 13 for supplying raw materials to the mixing container 12, a hot water supply device 14 for supplying hot water to the mixing container 12, and an extraction liquid obtained by mixing raw materials and hot water from the mixing container 12. It has an extracting means 15 for extracting and an extract sending means 16 for sending the extract extracted by the extracting means 15 to the cup C.
[0038]
In the mixing container 12, a mixing chamber 19 is formed in a lower part, and a receiving part 20 is formed in an upper part. The lower surface of the mixing chamber 19 and the upper surface of the receiving part 20 are each opened, and the mixing chamber 19 and the receiving part 20 are communicated. The mixing container 12 is driven up and down by a lifting mechanism (not shown).
[0039]
Further, the raw material supply means 13 has a plurality of canisters 23 for storing the coffee beans by type and feeding out the stored coffee beans by a predetermined amount, and guides the coffee beans fed from the canister 23 downward below these canisters 23. A chute 24 is arranged, and a mill 25 for grinding coffee beans guided below the chute 24 into powder is arranged. Therefore, coffee powder is supplied from the raw material supply means 13 to the receiving section 20 of the mixing container 12 as a raw material.
[0040]
Further, the hot water supply device 14 has a hot water tank 28 for boiling and storing hot water at a predetermined hot water temperature, and three hot water supply paths 29, 30, 31 are connected to the hot water tank 28.
[0041]
The first hot water supply path 29 has one upstream end connected to a hot water tank 28 via a solenoid valve VH1 as valve means, and the other downstream end connected to a side surface of the mixing chamber 19 of the mixing vessel 12. A pressurizing pump 36 such as a gear pump for pressurizing hot water and sending it to the mixing vessel 12 is provided on the way, and serves as first hot water supply means for feeding the hot water to the mixing chamber 19 of the mixing vessel 12. Hot water supply means 33 is configured.
[0042]
The second hot water supply path 30 has one end on the upstream side connected to the hot water tank 28 via the solenoid valve VH2, and the other end on the downstream side is disposed on the receiving portion 20 of the mixing vessel 12. Second hot water supply means 34 for supplying hot water to the 12 receiving portions 20 is configured.
[0043]
The third hot water supply path 31 has one end on the upstream side connected to the hot water tank 28 via the solenoid valve VH3, the other end on the downstream side disposed on the cup C, and a reservoir 35 for storing hot water in the middle. A pressurizing pump 36 for pressurizing and feeding hot water stored in the reservoir 35, a check valve 37 for preventing backflow of hot water, and a direct hot water supply means 38 for directly feeding hot water to the cup C are configured. ing.
[0044]
The extraction means 15 has a cylindrical cylinder 41 disposed below the mixing container 12, and a piston 42 is disposed in the cylinder 41 so as to be slidable in the vertical direction. , And moves vertically through a transmission mechanism 44 such as a crank.
[0045]
A filter 45 is inserted between the mixing container 12 and the cylinder 41, and the filter 45 is sandwiched between the mixing container 12 and the cylinder 41 by lowering the mixing container 12. The filter 45 captures the coffee powder in the mixing chamber 19 by suctioning the mixing chamber 19 with the downward movement of the piston 42, filters the coffee liquid as the extract, and sends the extracted coffee liquid into the cylinder 41. The used portion, which is fed by a feeding mechanism 47 from a roll portion 46 formed in a belt shape and wound in a roll shape and captures coffee powder for each extraction operation, is placed between the mixing container 12 and the cylinder 41. And an unused portion is supplied between the mixing container 12 and the cylinder 41.
[0046]
An extraction port 48 for discharging the extraction liquid sucked into the cylinder 41 is formed at a lower side of the cylinder 41.
[0047]
The extract sending means 16 has an extract sending path 51, one end of the extract sending path 51 on the upstream side is connected to the extraction port 48 of the cylinder 41, and the other end on the downstream side is on the cup C. A delivery pump 52 such as a gear pump for sending the extract to the cup C side is provided on the way.
[0048]
In addition, in the body of the cup-type beverage vending machine, in addition to the extraction device 11, a beverage providing device that provides a beverage using a powdered raw material, a supply device that supplies cold water, ice, and the like, and a cup C are stored and supplied. A cup supply device, a cup transport device 55 for transporting the cup C, a stirring device 56 for stirring the beverage in the cup C, and the like are provided. The stirrer 56 has an impeller 57, and moves the impeller 57 up and down with respect to the cup C, and rotates the impeller 57 while being lowered into the cup C to stir the beverage.
[0049]
The position of the cup C that feeds the extract from the extraction device 11 to the cup C and the hot water from the hot water tank 28 to the cup C is located behind the sales outlet provided on the front of the machine body and at the beverage cooking position below the stirring device 56. is there.
[0050]
Next, the mixing container 12 is shown in FIGS. The mixing container 12 has a container main body 61 made of, for example, a synthetic resin. A mixing container portion 62 that forms a mixing chamber 19 in a cup shape with an open lower surface is formed on a lower side of the container main body 61, and is formed on an upper side. Is formed with a receiving container section 63 forming a receiving section 20 in the shape of a cup having an open upper surface, and a communication port communicating between the mixing chamber 19 and the receiving section 20 is provided between the mixing container section 62 and the receiving container section 63. 64 are formed.
[0051]
The mixing container portion 62 has a substantially rectangular cross section in the horizontal direction, a dome-shaped or curved surface on the upper surface, and a communication port 64 formed at the top of the upper surface. A flange portion 65 is formed on the lower peripheral edge of the mixing container portion 62, and an annular protrusion 66 for holding the filter 45 is formed on the lower surface of the flange portion 65.
[0052]
One corner 67 of the mixing container 62 having a substantially rectangular cross section in the horizontal direction has a cylindrical shape having a nozzle hole 68 at a height near the lower part of the mixing chamber 19 for communicating the mixing chamber 19 with the outside. Nozzle 69 is formed. The nozzle 69 is opposed to a corner 70 located diagonally to the corner 67 where the nozzle 69 is formed, and is inclined downward toward the lower side of the mixing chamber 19. The nozzle hole 68 is formed in a tapered shape whose cross-sectional area decreases toward the mixing chamber 19. The other end of the hot water supply means 33 on the downstream side of the hot water supply path 29 is connected to the nozzle 69, and the hot water pressurized by the pressure pump 36 is discharged into the mixing chamber 19 through the nozzle 69.
[0053]
The receiving container portion 63 has a circular cross section in the horizontal direction, a bottom surface formed in a curved shape, and a communication port 64 formed at the lowest position of the bottom surface.
[0054]
Outside the mixing container 12, a mounting portion 71 for mounting the mixing container 12 to an elevating mechanism for moving the mixing container 12 vertically is formed.
[0055]
Next, a block diagram of the extraction device 11 is shown in FIG. 6, and the control unit 81 rotationally drives the raw material motor 82 for feeding coffee beans from each canister 23, the mill 25, the solenoid valves VH1, VH2, and the pressurizing pump 36. The pressurizing motor 83, the extraction motor 43, the delivery motor 84 that drives the delivery pump 52 to rotate, and the like are controlled.
[0056]
The pressurizing motor 83 and the delivery motor 84 are, for example, motors whose rotation speed varies in accordance with the duty ratio of a pulse motor or the like, that is, the number of pulses. The control unit 81 controls the pressurizing motor duty ratio varying unit 85 and the sending motor duty ratio varying unit 86.
[0057]
The control unit 81 has a function of a setting unit 87 for setting the number of rotations of the pressurizing pump 36 in accordance with the type of beverage, and at least the number of rotations of the extraction liquid delivery path 51 with respect to the number of rotations of the delivery pump 52 at the start of operation. Control means 88 for reducing the rotation speed of the delivery pump 52 at the end of the delivery of the extract, and gradually reducing the rotation speed of the delivery pump 52 from the start of the operation of the delivery pump 52 to the stop thereof. A function of temporarily driving the delivery pump 52 during the extraction operation by the extraction means 15 and stopping the temporary drive of the delivery pump 52 in a state where the extract in the mixing chamber 19 is descending from the nozzle 69. I have.
[0058]
Next, the operation of extracting regular coffee by the extraction device 11 under the control of the control unit 81 will be described with reference to the timing chart of FIG.
[0059]
When the regular coffee is selected by the selection button provided on the front surface of the cup-type beverage vending machine, the drive of the raw material motor 82 and the mill 25 of the canister 23 for storing the selected type of coffee beans is started. By driving the raw material motor 82, the coffee beans in the canister 23 are fed out, the coffee beans are ground by the mill 25, and the ground coffee powder falls into the mixing chamber 19 through the receiving portion 20 of the mixing container 12.
[0060]
Simultaneously with the selection of the regular coffee, the solenoid valve VH1 of the hot water supply means 33 is opened, the hot water in the hot water tank 28 flows out to the hot water supply path 29, and then the pressurizing pump 36 is driven. The pressurized hot water is discharged into the mixing chamber 19 through the nozzle 69 of the mixing container 12.
[0061]
Then, in the mixing chamber 19 of the mixing container 12, the hot water and the coffee powder are stirred and mixed with the force of the hot water discharged from the nozzle 69.
[0062]
At this time, the nozzle 69 of the mixing container 12 is opposed to the corner 70 located at a corner opposite to the corner 67 at one corner 67 of the mixing chamber 19 having a substantially rectangular cross section in the horizontal direction. Since the hot water discharged from the nozzle 69 is provided, the hot water is dispersed along the inner wall surfaces on both sides adjacent to the corner portion 67 and spreads over the entire mixing chamber 19, so that the stirring effect can be improved.
[0063]
Further, as shown in FIG. 2, since the nozzle 69 of the mixing container 12 is provided to be inclined downward toward the lower side of the mixing chamber 19, the hot water discharged from the nozzle 69 faces the lower side of the mixing chamber 19. A vertical circulating flow is generated in the mixing chamber 19 through the inner surface of the mixing chamber 19 toward the upper portion of the mixing chamber 19, and the stirring effect can be improved.
[0064]
Further, since the nozzle hole 68 of the nozzle 69 of the mixing vessel 12 is formed in a tapered shape having a smaller cross-sectional area toward the mixing chamber 19, the nozzle hole 68 is squeezed without impairing the flow of the hot water. Can be strengthened and the stirring effect can be improved.
[0065]
In this way, the pressurized hot water is discharged from the nozzle 69 of the mixing container 12 into the mixing chamber 19 to mix and mix the raw material and the hot water, so that the hot water and the coffee powder are mixed in the mixing chamber 19 of the mixing container 12. It can be sufficiently stirred in a short time. Therefore, the steaming time can be omitted or shortened.
[0066]
In addition, the hot water supply means 33 varies the number of rotations of the pressure pump 36 in accordance with the type of the extract, that is, the type of the selected regular coffee, so that the hot water discharged into the mixing chamber 19 of the mixing container 12 is heated. Since the stirring effect can be adjusted by changing the discharge pressure, it is possible to obtain an optimum extraction concentration corresponding to the type of the extract. For example, if the rotation speed of the pressurizing pump 36 is increased to increase the discharge pressure of the hot water, the stirring effect between the hot water and the coffee powder can be enhanced and the concentration can be increased, and conversely, the rotating speed of the pressurizing pump 36 can be increased. If the discharge pressure of the hot water is reduced by lowering the temperature, the effect of stirring the hot water and the coffee powder can be suppressed, and the concentration can be reduced. Further, by changing the duty ratio of the pressurizing pump 36 to the pressurizing motor 83, the pressurizing pump 36 can be easily variably controlled.
[0067]
After the start of the operation of the pressurizing pump 36, the solenoid valve VH2 of the second hot water supply means 34 is opened, and the hot water in the hot water tank 28 flows out to the hot water supply path 30 and is guided to the receiving portion 20 of the mixing vessel 12, The coffee powder adhering to the receiving section 20 can be poured into the mixing chamber 19.
[0068]
The solenoid valve VH1 of the hot water supply means 33 and the solenoid valve VH2 of the second hot water supply means 34 close after a predetermined time, respectively. The total amount of hot water flowing out in response to the opening of the solenoid valves VH1 and VH2 corresponds to the amount required to extract one cup of regular coffee. Therefore, a predetermined amount of hot water for one cup can be supplied in a short time through the two hot water supply paths 29 and 30. Moreover, a predetermined amount of hot water is supplied from the hot water tank 28 to the hot water supply path 29 by the solenoid valve VH1 of the hot water supply means 33, and the hot water supplied to the hot water supply path 29 is sent to the mixing vessel 12 by the pressurizing pump 36. Even if the number of rotations of the pressurizing pump 36 is varied according to the type of regular coffee, a required amount of hot water can be reliably supplied.
[0069]
The raw material motor 82 stops after feeding a predetermined amount of coffee beans from the canister 23, and the mill 25 stops after a predetermined time after the raw material motor 82 stops. When the mill 25 stops and the supply of the coffee powder ends, the hot water flowing into the hot water supply paths 29 and 30 still flows through the hot water supply paths 29 and 30 and the hot water pressurized by the pressurizing pump 36. While the agitation in the mixing chamber 19 is continued, the coffee powder adhered to the receiving section 20 can be reliably poured into the mixing chamber 19 by the hot water supplied to the receiving section 20.
[0070]
The pressurizing pump 36 is stopped after a predetermined time, and the stirring and mixing in the mixing chamber 19 ends. At this time, the nozzle 69 is located at a position where it is submerged in the extraction liquid in the mixing chamber 19, and the extraction liquid flows backward into the nozzle hole 68, and the coffee powder tries to enter together with the extraction liquid. Since the nozzle hole 68 of the nozzle 69 is formed in a tapered shape in which the cross-sectional area decreases toward the mixing chamber 19 side, coffee powder can be prevented from entering the nozzle hole 68 and clogging can be prevented.
[0071]
After the pressurizing pump 36 stops, the drive of the extraction motor 43 starts. The initial position of the piston 42 in the cylinder 41 is at a position just before the top dead center. From this position, the piston 42 descends through the top dead center, and the coffee liquid as the extract in the mixing chamber 19 of the mixing container 12 is filtered by the filter 45. Through the cylinder 41, and the coffee powder is captured by the filter 45.
[0072]
Since the hot water and the coffee powder in the mixing chamber 19 can be agitated by the pressurized hot water discharged from the nozzle 69, the piston 42 ascends and air is sent into the mixing chamber 19 through the filter 45 as in the related art, and the agitation is performed. Therefore, the initial position of the piston 42 in the cylinder 41 can be set to a position before the top dead center, and the operation can be immediately shifted to the extraction operation of sucking the coffee liquid in the mixing chamber 19, and the extraction time can be reduced.
[0073]
By forcibly sucking the coffee liquid into the cylinder 41 through the filter 45, the liquid level of the extraction liquid in the mixing chamber 19 is lowered, and the nozzle 69 which has been submerged after a predetermined time from the start of the driving of the extraction motor 43. Are exposed on the surface of the extract. In response to this timing, the pressurizing pump 36 is driven for a certain period of time to send air in the hot water supply path 29 to the nozzle 69, and extract liquid or coffee powder flowing back into the nozzle hole 68 of the nozzle 69 into the mixing chamber 19. This prevents the extraction liquid, coffee powder, and the like from remaining in the nozzle 69. The timing for starting the temporary driving of the delivery pump 52 may be either when the liquid level of the extract in the mixing chamber 19 falls below the nozzle 69 or when it is above the nozzle 69. If the timing at which the temporary drive of the first is stopped is such that the extract in the mixing chamber 19 is descending from the nozzle 69, the extract or coffee powder that has flowed back into the nozzle hole 68 is reliably blown into the mixing chamber 19. be able to.
[0074]
When the upper surface of the piston 42 descending in the cylinder 41 reaches the height of the extraction port 48, the coffee liquid in the cylinder 41 flows out to the extraction liquid delivery path 51 of the extraction liquid delivery means 16 through the extraction port 48. The delivery pump 52 of the extract delivery path 51 is driven, and the coffee pump is fed into the cup C by the delivery pump 52.
[0075]
As described above, in the extraction liquid sending means 16, since the coffee liquid extracted by the extraction means 15 is sent by the sending pump 52, the coffee liquid can be sent in a shorter time as compared with the case where the coffee liquid is sent using a head. Liquid extraction time can be reduced.
[0076]
The extraction liquid delivery means 16 reduces at least the rotation speed of the delivery pump 52 at the end of the delivery of the coffee liquid in the extract delivery path 51 with respect to the rotation speed of the delivery pump 52 at the start of operation. Therefore, it is possible to prevent the coffee liquid from ending and the air to be sent by the delivery pump 52 to prevent the coffee liquid from splashing and splashing around with the air at the outlet of the extraction liquid delivery path 51 and to be poured into the cup C. It can prevent the coffee liquid from foaming. For example, by gradually decreasing the rotation speed of the delivery pump 52 from the start of the operation of the delivery pump 52 to the stop of the delivery, even if the amount of the coffee solution changes, the delivery of the coffee solution in the extraction solution delivery path 51 can be performed. At the end point, the rotation speed of the delivery pump 52 can be reliably reduced. Further, by varying the duty ratio of the delivery motor 84, the delivery pump 52 can be easily variably controlled.
[0077]
If sugar or cream is selected when the beverage is selected, sugar or cream is put into the cup and transported to the beverage cooking position, and the coffee liquid is poured into the cup C.
[0078]
When sugar or cream is contained, the impeller 57 of the stirring device 56 descends into the cup C and rotates to stir the coffee liquid and the sugar or cream, and then rises after the impeller 57 stops rotating.
[0079]
This completes a series of extraction operations. In particular, since the pressurized hot water is discharged from the nozzle 69 of the mixing container 12 into the mixing chamber 19 to mix and mix the raw material and the hot water, The raw material and the hot water can be sufficiently stirred in a short time, and the time for extracting the coffee liquid can be reduced. At this time, since the air from the outside does not come into contact with the coffee liquid as compared with the case where the air is fed and stirred, the flavor such as the aroma and taste of the coffee liquid is not impaired, and the coffee liquid is cooled by air. Temperature does not drop.
[0080]
【The invention's effect】
According to the extraction device of the first aspect, since the pressurized hot water is discharged from the nozzle of the mixing container into the mixing chamber and the raw material and the hot water are stirred and mixed, the raw material and the hot water can be sufficiently mixed in the mixing container in a short time. And the extraction time of the extract can be shortened.
[0081]
According to the extraction device of the second aspect, in addition to the effect of the extraction device of the first aspect, the nozzle of the mixing vessel is provided at one corner of the mixing chamber having a substantially rectangular cross section in the horizontal direction. Since the corner is located opposite to the corner, the hot water discharged from the nozzle is distributed along the inner wall surfaces on both sides adjacent to the corner and spreads throughout the mixing chamber, improving the stirring effect. it can.
[0082]
According to the extraction device of the third aspect, in addition to the effect of the extraction device of the first or second aspect, the nozzle of the mixing vessel is provided so as to be inclined downward toward the lower side of the mixing chamber. The discharged hot water flows from the lower part of the mixing chamber toward the upper part of the mixing chamber through the inner surface of the opposing mixing chamber, and a vertical circulating flow is generated in the mixing chamber, so that the stirring effect can be improved.
[0083]
According to the extracting device of the fourth aspect, in addition to the effect of the extracting device of the first to third aspects, the nozzle hole of the nozzle of the mixing vessel is tapered such that the cross-sectional area decreases toward the mixing chamber side. Because of the shape, the nozzle hole can be squeezed without impairing the flow of the hot water to increase the force of discharging the hot water, and the raw material in the mixing chamber can be prevented from entering the nozzle hole.
[0084]
According to the extraction device of the fifth aspect, in addition to the effect of the extraction device of any one of the first to fourth aspects, hot water is supplied from the second hot water supply means to the receiving portion for receiving the raw material in the upper part of the mixing chamber. Therefore, a predetermined amount of hot water can be supplied from the nozzle of the hot water supply means in accordance with the supply of hot water in a short time, and the raw material attached to the receiving section can be poured into the mixing chamber.
[0085]
According to the extraction device of the sixth aspect, in addition to the effect of the extraction device of any one of the first to fifth aspects, a predetermined amount of hot water is supplied from the hot water tank to the hot water supply path by the valve means of the hot water supply means, Since the hot water supplied to the hot water supply path is sent to the mixing container by the pressure pump, a required amount of hot water can be reliably supplied.
[0086]
According to the extraction device of the seventh aspect, in addition to the effect of the extraction device of any one of the first to sixth aspects, in the hot water supply means, the pressurizing pump is temporarily driven during the extraction operation by the extraction means, and the mixing chamber is driven. The temporary driving of the pressurizing pump is stopped in a state where the extraction liquid is descending from the nozzle, so that the extraction liquid, the raw material, and the like flowing back into the nozzle can be discharged from the nozzle.
[0087]
According to the extraction device of the eighth aspect, in addition to the effect of the extraction device of any one of the first to seventh aspects, in the hot water supply means, the number of revolutions of the pressurizing pump can be varied according to the type of the extraction liquid. Accordingly, the stirring pressure can be adjusted by changing the discharge pressure of the hot water discharged into the mixing chamber of the mixing container, so that an optimum extraction concentration corresponding to the type of the extract can be obtained.
[0088]
According to the extraction device of the ninth aspect, in addition to the effect of the extraction device of the eighth aspect, the pressure pump can be easily variably controlled by changing the duty ratio of the pressure motor.
[0089]
According to the extraction device of the tenth aspect, in addition to the effect of the extraction device of any one of the first to ninth aspects, since the extract extracted by the extraction unit is sent by the delivery pump by the extract delivery unit, the head is dropped. The extraction liquid can be sent in a shorter time as compared with the case where the extraction liquid is used, and the extraction time of the extraction liquid can be shortened.
[0090]
According to the extraction device of the eleventh aspect, in addition to the effect of the extraction device of the tenth aspect, the extraction liquid sending means has at least the rotation speed of the delivery pump at the start of operation at least in the extraction liquid sending path. In order to reduce the rotation speed of the delivery pump at the end of the delivery of the extract, the extract is finished and the air is sent by the delivery pump, and the extract is splashed with the air at the outlet of the extract delivery path and splashes around. Can be prevented, and foaming of the extract can be prevented.
[0091]
According to the extractor of the twelfth aspect, in addition to the effect of the extractor of the eleventh aspect, the extract liquid sending means gradually increases the rotation speed of the delivery pump from the start to the stop of the operation of the delivery pump. Therefore, even if the amount of the extract changes, the rotation speed of the delivery pump can be reliably reduced at the end of the delivery of the extract in the extract delivery path.
[0092]
According to the extraction device of the thirteenth aspect, in addition to the effect of the extraction device of the twelfth aspect, by changing the duty ratio for the delivery motor, the delivery pump can be easily variably controlled.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an extraction device according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a mixing container of the extraction device.
FIG. 3 is a bottom view of the mixing container.
FIG. 4 is a plan view of the mixing container.
FIG. 5 is a side view of the same extraction container.
FIG. 6 is a block diagram of an extraction device according to the first embodiment;
FIG. 7 is a timing chart of an extraction operation by the extraction device.
[Explanation of symbols]
11 Extraction device
12 mixing container
13 Raw material supply means
15 Extraction means
16 Extraction liquid delivery means
19 Mixing room
20 Receiving Department
28 hot water tank
29 Hot water supply route
33 Hot water supply means
34 Second hot water supply means
36 Pressure pump
45 Filter
51 Extract liquid delivery route
52 Delivery pump
67 corner
68 Nozzle hole
69 nozzle
70 corner
83 Pressurizing motor
84 Sending motor
85 Pressurizing motor duty ratio variable means
86 Transmission motor duty ratio variable means
VH1 Solenoid valve as valve means

Claims (13)

A mixing chamber for mixing the raw material and hot water, and a mixing container having a nozzle communicating with the mixing chamber,
Material supply means for supplying a material to the mixing container,
A hot water supply unit that has a pressure pump that pressurizes and sends hot water, discharges the pressurized hot water from the nozzle of the mixing container into the mixing chamber, and stirs and mixes the raw material and the hot water;
An extraction apparatus, comprising: a filter; and extraction means for extracting an extract obtained by mixing the raw material and hot water from a mixing chamber of the mixing container through the filter. The mixing chamber of the mixing container has a substantially rectangular cross section in the horizontal direction,
2. The extraction device according to claim 1, wherein the nozzle of the mixing container is provided at one corner of the mixing chamber so as to face a corner located diagonally to the corner. 3. The extraction device according to claim 1, wherein the nozzle of the mixing container is inclined downward toward the lower side of the mixing chamber. The extraction device according to any one of claims 1 to 3, wherein the nozzle of the mixing container has a tapered nozzle hole whose cross-sectional area decreases toward the mixing chamber. The mixing vessel has a receiving section for receiving the raw material at the top of the mixing chamber,
The extraction device according to any one of claims 1 to 4, further comprising a second hot water supply means for supplying hot water to a receiving portion of the mixing container. The hot water supply means includes a hot water tank, a hot water supply path from the hot water tank to the mixing container via a pressure pump, and a valve means for supplying a predetermined amount of hot water from the hot water tank to the hot water supply path. An extraction device according to any one of claims 1 to 5, characterized in that: The hot water supply means temporarily drives the pressure pump during the extraction operation by the extraction means, and stops the temporary drive of the pressure pump while the extract in the mixing chamber is descending from the nozzle. 7. The extraction device according to any one of 1 to 6. The extraction device according to any one of claims 1 to 7, wherein the hot water supply means changes the rotation speed of the pressurizing pump according to the type of the extraction liquid. The pressurizing pump has a pressurizing motor whose rotation speed varies according to the duty ratio,
9. The extracting device according to claim 8, further comprising a pressurizing motor duty ratio varying means for changing the duty ratio of the pressurizing motor. It is provided with an extract delivery path for sending out the extract extracted by the extraction means, and an extract delivery means having a delivery pump for sending the extract in the extract delivery path provided in the extract delivery path. The extraction device according to any one of claims 1 to 9, characterized in that: 11. The extract pump according to claim 10, wherein the extraction liquid sending means reduces the rotation speed of the delivery pump at the end of the extraction liquid delivery in the extract delivery path at least with respect to the rotation speed of the delivery pump at the start of operation. Extraction equipment. 12. The extraction device according to claim 11, wherein the extraction liquid delivery means gradually reduces the rotation speed of the delivery pump during a period from the start to the stop of the delivery pump. The delivery pump has a delivery motor whose rotation speed varies in accordance with the duty ratio,
13. The extracting device according to claim 12, further comprising a sending motor duty ratio varying unit that changes the duty ratio of the sending motor.

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