JP3928942B2 - Extraction device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an extraction apparatus for extracting an extract by mixing raw materials and hot water.
[0002]
[Prior art]
  Conventionally, in a cup-type beverage vending machine that supplies and sells beverages in cups, in the case of beverages that use coffee bean raw materials, a predetermined amount of coffee beans are fed out from the raw material supply device that stores the coffee beans, and the coffee beans that are fed out Grind with a mill, mix the ground coffee powder and hot water discharged from the hot water tank from the top of the mixing container and mix, and raise the piston of the extraction cylinder that is placed through the filter at the bottom of the mixing container. The air is fed into the mixing container through to stir the coffee powder and hot water, 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.
[0003]
  However, since hot water is supplied from the hot water tank to the mixing container using a head between the hot water outlet of the hot water tank and the mixing container, it takes time to supply hot water. In order to stir 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 a certain steaming time. Moreover, it takes time to extract the coffee liquid because it uses the head of the extraction cylinder and the cup to introduce the coffee liquid from the extraction cylinder into the cup. For this reason, it takes time to extract regular coffee.
[0004]
  Further, for example, as described in Japanese Patent Publication No. 5-31413, after putting coffee powder and hot water into a mixing container, pressurized air pressurized by a pump with respect to the lower part of the mixing container is externally provided. , The coffee powder and 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 touches 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 the 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]
  In addition, as described in Japanese Patent Publication No. 5-31413, when compressed air is fed into the mixing container from the outside in order to shorten the extraction time, there is a problem that the flavor and temperature of the coffee liquid are impaired.
[0008]
  This invention is made in view of such a point, and it aims at providing the extraction apparatus which can fully stir a raw material and hot water within a mixing container in a short time, and can shorten the extraction time of an extract. .
[0009]
[Means for Solving the Problems]
  ContractClaim1The extraction device described isA mixing chamber for mixing the 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, and a pressure pump for sending hot water under pressure, Hot water supply means for discharging the pressurized hot water from the nozzle of the mixing container into the mixing chamber and stirring and mixing the raw material and hot water, and a filter, and through the filter, the raw material and hot water are supplied from the mixing chamber of the mixing container. An extraction means for extracting an extract by mixing, andThe mixing chamber of the mixing container is formed in a substantially quadrangular cross section in the horizontal direction,SaidThe nozzle of the mixing container is provided at one corner of the mixing chamber so as to face a corner located diagonally to this corner.
[0010]
  And in this configuration,Pressurized hot water is discharged from the nozzle of the mixing container into the mixing chamber to stir and mix the raw material and hot water, so the raw material and hot water are sufficiently stirred in the mixing container in a short time, and the extraction time for the extract is shortened. Is done. Moreover,Since the nozzle of the mixing container is provided at one corner of the mixing chamber formed in a substantially quadrangular cross section in the horizontal direction so as to face the corner located opposite to this corner, the hot water discharged from the nozzle It is dispersed along the inner wall surfaces on both sides adjacent to the corners and spreads over the entire mixing chamber, improving the stirring effect.
[0011]
  Claim2The extraction device described isA mixing chamber for mixing the 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, and a pressure pump for sending hot water under pressure, Hot water supply means for discharging the pressurized hot water from the nozzle of the mixing container into the mixing chamber and stirring and mixing the raw material and hot water, and a filter, and through the filter, the raw material and hot water are supplied from the mixing chamber of the mixing container. An extraction means for extracting an extract by mixing, andThe nozzle of the mixing container is inclined downward toward the lower side of the mixing chamber.
[0012]
  And in this configuration,Pressurized hot water is discharged from the nozzle of the mixing container into the mixing chamber to stir and mix the raw material and hot water, so the raw material and hot water are sufficiently stirred in the mixing container in a short time, and the extraction time for the extract is shortened. Is done. Moreover,Since the nozzle of the mixing container is inclined downward toward the lower side of the mixing chamber, the hot water discharged from the nozzle passes from the lower portion of the mixing chamber toward the upper portion of the mixing chamber through the inner surface of the opposing mixing chamber, and in the mixing chamber. A vertical circulation flow is generated, and the stirring effect is improved.
[0013]
  Claim3The extraction device described isA mixing chamber for mixing the 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, and a pressure pump for sending hot water under pressure, Hot water supply means for discharging the pressurized hot water from the nozzle of the mixing container into the mixing chamber and stirring and mixing the raw material and hot water, and a filter, and through the filter, the raw material and hot water are supplied from the mixing chamber of the mixing container. An extraction means for extracting an extract by mixing, andThe nozzle of the mixing container is formed with a tapered nozzle hole whose cross-sectional area becomes smaller toward the mixing chamber side.
[0014]
  And in this configuration,Pressurized hot water is discharged from the nozzle of the mixing container into the mixing chamber to stir and mix the raw material and hot water, so the raw material and hot water are sufficiently stirred in the mixing container in a short time, and the extraction time for the extract is shortened. Is done. Moreover,The nozzle hole of the nozzle of the mixing container is tapered so that the cross-sectional area decreases toward the mixing chamber, so that the nozzle hole is squeezed without impairing the flow of hot water, and the momentum of hot water discharge is increased. The raw material in the room is prevented from entering the nozzle hole.
[0015]
  ContractClaim4The extraction device according to claim 1 to claim 1.3In any one of the extraction apparatuses, 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 extraction liquid in the mixing chamber is descending from the nozzle. To do.
[0016]
  In this configuration, 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 in a state where the extraction liquid in the mixing chamber is descending from the nozzle. Then, the extracted liquid or the raw material that flows back into the nozzle is discharged from the nozzle.
[0017]
  Claim5The extraction device according to claim 1 to claim 1.4In any one of the extraction apparatuses, the hot water supply means varies the number of rotations of the pressure pump according to the type of the extract.
[0018]
  In this configuration, the hot water supply means adjusts the stirring effect by changing the discharge pressure of the hot water discharged into the mixing chamber of the mixing container by changing the number of rotations of the pressure pump according to the type of the extract. Therefore, the optimum extraction concentration corresponding to the type of the extract is adjusted.
[0019]
  Claim6The extracting device as claimed in claim5In the extraction apparatus described above, the pressurizing pump has a pressurizing motor whose rotation speed is variable in accordance with the energization rate, and has a pressurization motor energization rate variable means for varying the energization rate for the pressurization motor. It is what.
[0020]
  In this configuration, variable control of the pressurization pump is facilitated by varying the energization rate for the pressurization motor.
[0021]
  Claim7The extraction device according to claim 1 to claim 1.6The extraction apparatus according to any one of the above, wherein the extraction liquid delivery path includes an extraction liquid delivery path for delivering the extraction liquid extracted by the extraction means, and a delivery pump for delivering the extraction liquid in the extraction liquid delivery path provided in the extraction liquid delivery path. Means.
[0022]
  In this configuration, since the extraction liquid extracted by the extraction means is sent by the delivery pump by the extraction liquid delivery means, the extraction liquid is sent in a shorter time compared to the case where the extraction liquid is sent using a drop, and the extraction liquid is extracted. Time is shortened.
[0023]
  Claim8The extracting device as claimed in claim7In the extraction apparatus described above, the extraction liquid delivery means reduces at least the rotation speed of the delivery pump at the end of delivery of the extract in the extraction liquid delivery path relative to the revolution speed of the delivery pump at the start of operation. .
[0024]
  In this configuration, the extraction liquid delivery means reduces the rotation speed of the delivery pump at the end of delivery of the extract in the extract delivery path relative to the revolution speed of the delivery pump at the start of operation. At the end of the liquid, air is sent by the delivery pump, and the extract is prevented from being splashed with air at the outlet of the extract delivery path and scattered around the periphery, and the extract is prevented from foaming.
[0025]
  Claim9The extracting device as claimed in claim8In the described extraction apparatus, the extraction liquid delivery means gradually reduces the number of revolutions of the delivery pump from the start to the stop of the delivery pump.
[0026]
  In this configuration, the extraction liquid delivery means gradually reduces the number of revolutions of the delivery pump from the start to the stop of the operation of the delivery pump. The number of rotations of the delivery pump is reliably reduced at the end of delivery of the extract.
[0027]
  Claim10The extracting device as claimed in claim9In the extracting device described above, the delivery pump has a delivery motor whose rotation speed is variable in accordance with the energization rate, and has a delivery motor energization rate varying means for varying the energization rate for the delivery motor. Is.
[0028]
  In this configuration, variable control of the delivery pump is facilitated by varying the energization rate for the delivery motor.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0030]
  FIG. 1 shows an extraction device, which extracts regular coffee made from coffee beans, and is installed in the body of a cup-type beverage vending machine that provides and sells beverages to the cup C. The
[0031]
  The extraction device 11 includes a mixing container 12, raw material supply means 13 for supplying raw material to the mixing container 12, a hot water supply device 14 for supplying hot water to the mixing container 12, and an extract obtained by mixing the raw material and hot water from the mixing container 12. Extraction means 15 for extracting, and extraction liquid sending means 16 for sending the extraction liquid extracted by the extraction means 15 to the cup C are provided.
[0032]
  The mixing container 12 has a mixing chamber 19 formed in the lower part and a receiving part 20 formed in the upper part. The lower surface of the mixing chamber 19 and the upper surface of the receiving portion 20 are opened, and the mixing chamber 19 and the receiving portion 20 are communicated with each other. The mixing container 12 is driven up and down by a lifting mechanism (not shown).
[0033]
  The raw material supply means 13 has a plurality of canisters 23 for storing 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 to the canisters 23. A chute 24 is disposed, and a mill 25 is disposed for grinding the coffee beans guided below the chute 24 into powder. Therefore, the raw material supply means 13 supplies the coffee powder as the raw material to the receiving unit 20 of the mixing container 12.
[0034]
  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 and 31 are connected to the hot water tank 28.
[0035]
  In the first hot water supply path 29, one end on the upstream side is connected to the hot water tank 28 via a solenoid valve VH1 as a valve means, and the other end on the downstream side is connected to the side surface of the mixing chamber 19 of the mixing container 12. A pressurizing pump 36 such as a gear pump that pressurizes and feeds hot water into the mixing container 12 is disposed in the middle, and serves as first hot water supply means for feeding the pressurized hot water into the mixing chamber 19 of the mixing container 12. The hot water supply means 33 is configured.
[0036]
  The second hot water supply path 30 has one end on the upstream side connected to the hot water tank 28 via the electromagnetic valve VH2, and the other end on the downstream side is disposed on the receiving portion 20 of the mixing container 12. A second hot water supply means 34 for supplying hot water to the twelve receiving portions 20 is configured.
[0037]
  The third hot water supply path 31 has one end on the upstream side connected to the hot water tank 28 via the electromagnetic 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 that pressurizes and sends hot water stored in the reservoir 35 and a check valve 37 that prevents backflow of hot water are connected, and direct hot water supply means 38 that directly supplies hot water to the cup C is configured. ing.
[0038]
  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. Is moved up and down via a transmission mechanism 44 such as a crank.
[0039]
  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 when the mixing container 12 is lowered. This filter 45 sucks the mixing chamber 19 as the piston 42 moves downward, captures the coffee powder in the mixing chamber 19, filters the coffee liquid as the extract, and feeds it into the cylinder 41. The used portion that is formed in a belt shape and is fed by the feed mechanism 47 from the roll portion 46 wound in a roll shape and captures the coffee powder for each extraction operation is between the mixing container 12 and the cylinder 41. The unused portion is supplied between the mixing container 12 and the cylinder 41.
[0040]
  On the lower side of the cylinder 41, an extraction port 48 for discharging the extracted liquid sucked into the cylinder 41 is formed.
[0041]
  The extract sending means 16 has an extract sending path 51, one end on the upstream side of the extract sending path 51 is connected to the extraction port 48 of the cylinder 41, and the other end on the downstream side on the cup C. In the middle, a delivery pump 52 such as a gear pump is arranged in the middle to feed the extract to the cup C side.
[0042]
  Further, in the body of the cup-type beverage vending machine, in addition to the extraction device 11, a beverage providing device that provides beverages using powdered raw materials, a supply device that supplies cold water, ice, and the like, and a cup C are housed 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 agitator 56 has an impeller 57, and the impeller 57 is moved up and down with respect to the cup C, and the beverage is agitated by rotating the impeller 57 while being lowered into the cup C.
[0043]
  The position of the cup C for feeding 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 behind the sales opening provided on the front of the machine body and at the beverage cooking position below the stirring device 56. is there.
[0044]
  Next, the mixing container 12 is shown in FIGS. The mixing container 12 includes a container body 61 made of, for example, a synthetic resin, and a mixing container portion 62 that forms a mixing chamber 19 in a cup shape with an opening on the lower surface is formed on the lower side of the container body 61. A receiving container part 63 that forms a receiving part 20 in the shape of a cup with an open top is formed, and a communication port that communicates the mixing chamber 19 and the receiving part 20 between the mixing container part 62 and the receiving container part 63 64 is formed.
[0045]
  The mixing container portion 62 has a substantially quadrangular cross section in the horizontal direction, an upper surface formed in a dome shape, that is, a curved surface, and a communication port 64 formed at the apex position of the upper surface. A flange portion 65 is formed on the periphery of the lower end of the mixing container portion 62, and an annular projecting portion 66 for pressing the filter 45 is formed on the lower surface of the flange portion 65.
[0046]
  A cylindrical portion 67 having a nozzle section 68 communicating with the outside of the mixing chamber 19 at the height position in the vicinity of the lower portion of the mixing chamber 19 is formed at one corner 67 of the mixing container portion 62 having a substantially square horizontal cross section. Nozzle 69 is formed. The nozzle 69 is opposed to a corner portion 70 positioned diagonally to the corner portion 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 having a cross-sectional area that decreases toward the mixing chamber 19. The nozzle 69 is connected to the other end of the hot water supply path 29 on the downstream side of the hot water supply path 29, and hot water pressurized by the pressure pump 36 is discharged into the mixing chamber 19 through the nozzle 69.
[0047]
  The receiving container portion 63 has a circular cross section in the horizontal direction and a bottom surface formed in a curved shape, and a communication port 64 is formed at the lowest position of the bottom surface.
[0048]
  On the outside of the mixing container 12, an attachment portion 71 for attaching to an elevating mechanism for moving the mixing container 12 in the vertical direction is formed.
[0049]
  Next, FIG. 6 shows a block diagram of the brewing device 11, and the control unit 81 rotationally drives the raw material motor 82, the mill 25, the electromagnetic valves VH1 and VH2, and the pressurizing pump 36 that feed coffee beans from each canister 23. The pressurization motor 83, the extraction motor 43, the delivery motor 84 that rotationally drives the delivery pump 52, and the like are controlled.
[0050]
  The pressurizing motor 83 and the sending motor 84 are, for example, motors whose rotation speed is variable corresponding to the energization rate, that is, the number of pulses, such as a pulse motor. The energization rate variable means 86 controls the pressurization motor energization rate varying means 85 and the sending motor energization rate varying means 86.
[0051]
  The control unit 81 has at least the function of the setting means 87 for setting the rotation speed of the pressurizing pump 36 corresponding to the type of beverage, the rotation speed of the delivery pump 52 at the start of operation, at least in the extraction liquid delivery path 51. The number of rotations of the delivery pump 52 at the end of delivery of the extract liquid, and the control means 88 for gradually reducing the number of revolutions of the delivery pump 52 between the start of operation of the delivery pump 52 and the stop of operation. And a function of temporarily driving the delivery pump 52 during the extraction operation by the extraction means 15 and stopping the delivery pump 52 while the extraction liquid in the mixing chamber 19 is descending from the nozzle 69. Yes.
[0052]
  Next, the regular coffee extraction operation by the extraction device 11 under the control of the control unit 81 will be described with reference to the timing chart of FIG.
[0053]
  When regular coffee is selected with a selection button provided on the front face of the cup-type beverage vending machine, driving of the raw material motor 82 and the mill 25 of the canister 23 that stores the selected type of coffee beans is started. The coffee beans in the canister 23 are fed out by driving the raw material motor 82, the coffee beans are ground by the mill 25, and the ground coffee powder falls into the mixing chamber 19 through the receiving part 20 of the mixing container 12.
[0054]
  Simultaneously with the selection of 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 into the hot water supply path 29, and then the pressurizing pump 36 is driven. Pressurized hot water is discharged into the mixing chamber 19 through the nozzle 69 of the mixing container 12.
[0055]
  In the mixing chamber 19 of the mixing container 12, the hot water and the coffee powder are stirred and mixed with the momentum of the hot water discharged from the nozzle 69.
[0056]
  At this time, the nozzle 69 of the mixing container 12 is opposed to a corner portion 70 positioned diagonally to the corner portion 67 at one corner portion 67 of the mixing chamber 19 having a horizontal cross section formed in a substantially square shape. Since it is provided, the hot water discharged from the nozzle 69 is dispersed along the inner wall surfaces on both sides adjacent to the corner portion 67 and spreads over the entire mixing chamber 19, thereby improving the stirring effect.
[0057]
  Furthermore, as shown in FIG. 2, the nozzle 69 of the mixing container 12 is inclined downward toward the lower side of the mixing chamber 19, so that the hot water discharged from the nozzle 69 is opposed to the lower portion of the mixing chamber 19. A vertical circulation 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.
[0058]
  Further, since the nozzle hole 68 of the nozzle 69 of the mixing container 12 is formed in a tapered shape whose sectional area decreases toward the mixing chamber 19 side, the nozzle hole 68 is squeezed without damaging the hot water flow. The momentum of discharging can be increased and the stirring effect can be improved.
[0059]
  Thus, hot water and coffee powder are mixed in the mixing chamber 19 of the mixing container 12 by discharging the pressurized hot water into the mixing chamber 19 from the nozzle 69 of the mixing container 12 and stirring and mixing the raw material and hot water. It can be sufficiently stirred in a short time. Therefore, the steaming time can be omitted or shortened.
[0060]
  Moreover, in the hot water supply means 33, the number of hot water discharged into the mixing chamber 19 of the mixing container 12 is varied by varying the number of rotations of the pressure pump 36 in accordance with the type of extract, that is, the type of regular coffee selected. Since the agitation effect can be adjusted by varying the discharge pressure, the optimum extraction concentration corresponding to the type of the extract can be achieved. For example, if the rotation speed of the pressurizing pump 36 is increased to increase the discharge pressure of hot water, the stirring effect of hot water and coffee powder can be increased, and the concentration can be increased. If the discharge pressure of hot water is reduced by lowering, the stirring effect of hot water and coffee powder can be suppressed and the concentration can be reduced. Further, the pressure pump 36 can be easily variably controlled by varying the energization rate of the pressure pump 36 to the pressure motor 83.
[0061]
  In addition, after the start of driving of the pressurizing pump 36, the electromagnetic valve VH2 of the second hot water supply means 34 is opened, the hot water in the hot water tank 28 flows out into the hot water supply path 30, and is guided to the receiving part 20 of the mixing container 12. Coffee powder adhering to the receiving unit 20 can be poured into the mixing chamber 19.
[0062]
  The electromagnetic valve VH1 of the hot water supply means 33 and the electromagnetic valve VH2 of the second hot water supply means 34 are closed after a predetermined time. The total amount of hot water that flows 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 electromagnetic 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 container 12 by the pressure pump 36. Even if the rotation speed of the pressurizing pump 36 is varied according to the type of regular coffee, the required amount of hot water can be reliably supplied.
[0063]
  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 is stopped and the supply of the coffee powder is finished, the hot water flowing into the hot water supply passages 29 and 30 is still flowing through the hot water supply passages 29 and 30, and the hot water pressurized by the pressure pump 36 is supplied. The coffee powder adhering to the receiving unit 20 can be reliably poured into the mixing chamber 19 by the hot water supplied to the receiving unit 20 while stirring in the mixing chamber 19 is continued.
[0064]
  The pressurizing pump 36 is stopped after a predetermined time, and the stirring and mixing in the mixing chamber 19 is finished. At this time, the nozzle 69 is at a height position where the extraction liquid in the mixing chamber 19 is submerged in water, and the extraction liquid flows backward into the nozzle hole 68 and the coffee powder tries to enter with the extraction liquid. Since the nozzle hole 68 of the nozzle 69 is formed in a taper shape whose sectional area decreases toward the mixing chamber 19 side, the coffee powder can be prevented from entering the nozzle hole 68 and clogging can be prevented.
[0065]
  After the pressurization pump 36 is stopped, the extraction motor 43 starts to be driven. The initial position of the piston 42 in the cylinder 41 is at a position before the top dead center, and from this position, the piston 42 passes through the top dead center and descends, and the coffee liquid that is the extraction liquid in the mixing chamber 19 of the mixing container 12 is filtered 45. The coffee powder is forcibly sucked into the cylinder 41, and the coffee powder is captured by the filter 45.
[0066]
  Since the hot water and coffee powder in the mixing chamber 19 can be stirred with pressurized hot water discharged from the nozzle 69, the piston 42 rises and air is fed into the mixing chamber 19 through the filter 45 as in the conventional case. 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 extraction operation for sucking the coffee liquid in the mixing chamber 19 can be immediately performed, thereby shortening the extraction time.
[0067]
  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 that has been submerged after a predetermined time from the start of the driving of the extraction motor 43. Is exposed on the surface of the extract. Corresponding to this timing, the pressurizing pump 36 is driven for a certain period of time, the air in the hot water supply path 29 is sent to the nozzle 69, and the extracted liquid or coffee powder that has flowed back into the nozzle hole 68 of the nozzle 69 is fed into the mixing chamber 19. This prevents the extraction liquid or coffee powder from remaining in the nozzle 69. The timing for starting the temporary driving of the delivery pump 52 may be when the liquid level of the extraction liquid in the mixing chamber 19 is lowered from the nozzle 69 or above the nozzle 69. If the extraction liquid in the mixing chamber 19 is in a state where the extraction liquid in the mixing chamber 19 is descending from the nozzle 69, the extraction liquid or coffee powder that has flowed back into the nozzle hole 68 is surely blown out into the mixing chamber 19. be able to.
[0068]
  Further, 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 through the extraction port 48 to the extraction liquid delivery path 51 of the extraction liquid delivery means 16. The delivery pump 52 of the extraction liquid delivery path 51 is driven, and the coffee liquid is fed into the cup C by the delivery pump 52.
[0069]
  In this way, in the extraction liquid delivery means 16, the coffee liquid extracted by the extraction means 15 is sent by the delivery pump 52, so that the coffee liquid can be sent in a shorter time compared to the case where the coffee liquid is sent using a drop. Liquid extraction time can be shortened.
[0070]
  The extraction liquid delivery means 16 reduces at least the rotational speed of the delivery pump 52 at the end of delivery of the coffee liquid in the extraction liquid delivery path 51 with respect to the rotational speed of the delivery pump 52 at the start of operation. Therefore, the coffee liquid is finished and air is sent by the delivery pump 52, and at the outlet of the extract delivery path 51, the coffee liquid can be prevented from splashing together with the air and splashing around the periphery, and poured into the cup C. It is possible to prevent the coffee liquid from foaming. For example, even if the amount of coffee liquid changes by gradually decreasing the rotation speed of the delivery pump 52 between the start of operation of the delivery pump 52 and the stop of operation, the delivery of the coffee liquid in the extract delivery path 51 At the end time, the rotation speed of the delivery pump 52 can be reliably reduced. Further, by changing the energization rate for the delivery motor 84, the delivery pump 52 can be easily variably controlled.
[0071]
  When sugar or cream is selected at the time of selection of the beverage, the sugar or cream is put into the cup and conveyed to the beverage cooking position, and the coffee liquid is poured into the cup C.
[0072]
  When sugar or cream is contained, the impeller 57 of the stirring device 56 descends into the cup C and rotates, stirs the coffee liquid and sugar or cream, and rises after the impeller 57 stops rotating.
[0073]
  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 stir and mix the raw material and hot water, The raw material and hot water can be sufficiently stirred in a short time, and the extraction time of the coffee liquid can be shortened. At this time, the air from outside does not touch the coffee liquid as compared with the case where the air is fed and stirred, so that the flavor of the coffee liquid is not impaired and the coffee liquid is cooled by the air. Temperature does not decrease.
[0074]
【The invention's effect】
  ContractClaim1According to the extraction device described,By discharging the pressurized hot water from the nozzle of the mixing container into the mixing chamber and stirring and mixing the raw material and hot water, the raw material and hot water can be sufficiently stirred in the mixing container in a short time, and the extraction time of the extract can be reduced. In addition to shortening,Since the nozzle of the mixing container is provided at one corner of the mixing chamber formed in a substantially quadrangular cross section in the horizontal direction so as to face the corner located opposite to this corner, the hot water discharged from the nozzle It can be dispersed along the inner wall surfaces on both sides adjacent to the corner and spread over the entire mixing chamber, thereby improving the stirring effect.
[0075]
  Claim2According to the extraction device described,By discharging the pressurized hot water from the nozzle of the mixing container into the mixing chamber and stirring and mixing the raw material and hot water, the raw material and hot water can be sufficiently stirred in the mixing container in a short time, and the extraction time of the extract can be reduced. In addition to shortening,Since the nozzle of the mixing container is inclined downward toward the lower side of the mixing chamber, the hot water discharged from the nozzle passes from the lower portion of the mixing chamber toward the upper portion of the mixing chamber through the inner surface of the opposing mixing chamber, and in the mixing chamber. A vertical circulation flow is generated, and the stirring effect can be improved.
[0076]
  Claim3According to the extraction device described,By discharging the pressurized hot water from the nozzle of the mixing container into the mixing chamber and stirring and mixing the raw material and hot water, the raw material and hot water can be sufficiently stirred in the mixing container in a short time, and the extraction time of the extract can be reduced. In addition to shortening,The nozzle hole of the nozzle of the mixing container is tapered so that the cross-sectional area decreases toward the mixing chamber. The raw material in the room can be prevented from entering the nozzle hole.
[0077]
  ContractClaim4According to the extractor described, claims 1 to3In addition to the effect of any one of the extraction devices, the hot water supply means temporarily drives the pressure pump during the extraction operation by the extraction means, and the extractor in the mixing chamber is lowered from the nozzle. Since the temporary driving is stopped, the extracted liquid or the raw material that has flowed back into the nozzle can be discharged from the nozzle.
[0078]
  Claim5According to the extractor described, claims 1 to4In addition to the effect of any of the extraction devices, the hot water supply means can vary the discharge pressure of the hot water discharged into the mixing chamber of the mixing container by varying the number of rotations of the pressure pump according to the type of the extract. Since the stirring effect can be adjusted, an optimum extraction concentration corresponding to the type of the extract can be obtained.
[0079]
  Claim6According to the described extraction device, the claim5In addition to the effect of the described extraction device, the pressure pump can be easily variably controlled by varying the energization rate for the pressure motor.
[0080]
  Claim7According to the extractor described, claims 1 to6In addition to the effect of any one of the extraction devices, the extraction liquid delivery means sends the extraction liquid extracted by the extraction means with a delivery pump, so that the extraction liquid is sent in a shorter time than when the head is sent using a drop. The extraction time of the extract can be shortened.
[0081]
  Claim8According to the described extraction device, the claim7In addition to the effect of the extraction device described above, the extract delivery means lowers the number of revolutions of the delivery pump at the end of delivery of the extract in the extract delivery path relative to the number of revolutions of the delivery pump at the start of operation. Therefore, it is possible to prevent the extraction liquid from being foamed and splashing to the surroundings with the air at the outlet of the extraction liquid delivery path by the end of the extraction liquid and being sent with the air, and to prevent the extraction liquid from foaming. .
[0082]
  Claim9According to the described extraction device, the claim8In addition to the effects of the extraction device described above, the extract delivery means gradually reduces the number of revolutions of the delivery pump from the start of operation of the delivery pump to the stop of operation, so that even if the amount of the extract changes, It is possible to reliably reduce the number of revolutions of the delivery pump at the end of delivery of the extract in the extract delivery path.
[0083]
  Claim10According to the described extraction device, the claim9In addition to the effect of the extraction device described, the delivery pump can be easily variably controlled by varying the energization rate for the delivery motor.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an extraction apparatus showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the 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 the extraction device.
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 Extract feeding means
        19 MixRoom
        33 Hot water supplierSteps
        36 Pressure pump
        45 Filter
        51 Extract feed path
        52 Delivery pump
        67 Corner
        68 Nozzle holes
        69 nozzles
        70 corners
        83 Pressurizing motor
        84 Sending motor
        85 Pressurization motor energization rate variable means
        86 Variable motor energization rate for sendingSteps

Claims (10)

A mixing chamber for mixing the raw material and hot water, and a mixing container having a nozzle communicating with the mixing chamber;
Raw material supply means for supplying raw materials to the mixing container;
A hot water supply means having a pressure pump for sending hot water under pressure, discharging the pressurized hot water into the mixing chamber from the nozzle of the mixing container, and stirring and mixing the raw material and hot water;
An extraction means that has a filter and extracts an extract by mixing raw material and hot water from the mixing chamber of the mixing container through the filter;
Comprising
Mixing chamber of the mixing vessel, a horizontal cross section is formed in a substantially rectangular shape,
The nozzle of the mixing vessel, Extraction device you characterized in that opposite is provided at the corner portion located on the corner diagonally at one corner of the mixing chamber. A mixing chamber for mixing the raw material and hot water, and a mixing container having a nozzle communicating with the mixing chamber;
Raw material supply means for supplying raw materials to the mixing container;
A hot water supply means having a pressure pump for sending hot water under pressure, discharging the pressurized hot water into the mixing chamber from the nozzle of the mixing container, and stirring and mixing the raw material and hot water;
An extraction means that has a filter and extracts an extract by mixing raw material and hot water from the mixing chamber of the mixing container through the filter;
Comprising
The nozzle of the mixing vessel, Extraction device toward the lower side of the mixing chamber characterized in that it is inclined downward. A mixing chamber for mixing the raw material and hot water, and a mixing container having a nozzle communicating with the mixing chamber;
Raw material supply means for supplying raw materials to the mixing container;
A hot water supply means having a pressure pump for sending hot water under pressure, discharging the pressurized hot water into the mixing chamber from the nozzle of the mixing container, and stirring and mixing the raw material and hot water;
An extraction means that has a filter and extracts an extract by mixing raw material and hot water from the mixing chamber of the mixing container through the filter;
Comprising
Wherein the nozzle of the mixing vessel, out extraction you characterized in that the tapered nozzle hole cross-sectional area becomes smaller toward the mixing chamber side is formed device. 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 in a state where the extraction liquid in the mixing chamber is descending from the nozzle. 1 to 3 extraction apparatus according any one. The extraction device according to any one of claims 1 to 4 , wherein the hot water supply means varies the number of rotations of the pressure pump according to the type of the extract. The pressurizing pump has a pressurizing motor whose rotational speed is variable in accordance with the energization rate,
6. The extraction device according to claim 5 , further comprising a pressurization motor energization rate varying means for varying the energization rate of the pressurization motor. An extraction liquid delivery path for delivering an extraction liquid extracted by the extraction means, and an extraction liquid delivery means having a delivery pump for delivering the extraction liquid in the extraction liquid delivery path provided in the extraction liquid delivery path. The extraction device according to any one of claims 1 to 6, characterized in that: Extract delivery means, with respect to the rotational speed of the delivery pump driving start time, according to claim 7, wherein reducing the rotational speed of the feed pump delivery end of the extract of at least extract delivery path Extraction device. 9. The extraction device according to claim 8 , wherein the extraction liquid delivery means gradually decreases the number of revolutions of the delivery pump between the start of operation of the delivery pump and the stop of operation. The delivery pump has a delivery motor whose number of rotations is variable according to the energization rate,
The extraction apparatus according to claim 9 , further comprising: a sending motor energization rate varying unit that varies the energization rate of the sending motor.

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