JP5388517B2 - Beverage extractor - Google Patents

Description

  The present invention relates to a beverage extraction apparatus for extracting a beverage using an extraction raw material and hot water.

  Conventionally, in beverage extraction apparatuses such as cup-type beverage vending machines that sell beverages in cups, for example, when extracting regular coffee that uses coffee beans as an extraction raw material, the extraction container and the liquid receiving block are filtered. In a state of being sandwiched and combined, coffee powder obtained by grinding coffee beans and hot water are supplied to an extraction container, and the coffee powder and hot water are mixed in the extraction container to extract a coffee beverage. Then, the inside of the liquid receiving block is reduced from the atmospheric pressure by a tube pump, the coffee beverage in the extraction container is sucked into the liquid receiving block through the filter, and the coffee beverage sucked and taken out by the liquid receiving block is sent to the cup. doing.

  When the coffee beverage has been removed from the extraction container, the tube pump is stopped, the separation container and the liquid receiving block are separated from each other to secure a gap through which the filter and used coffee powder captured by the filter move, and then the filter is removed. By moving, the filter part in which the used coffee powder is captured is discharged between the extraction container and the liquid receiving block, and the unused filter part is supplied.

In the tube pump, a rotating body is rotatably disposed in an annular pump casing, and an intermediate portion of a tube for feeding a coffee beverage is disposed between the inner wall of the pump casing and the rotating body. A plurality of tube rollers are arranged around the rotating body, and by rotating the rotating body, each tube roller crushes the tube and closes the inside, while moving the closing position in the longitudinal direction of the tube. It is comprised so that the pump effect | action which sends out the coffee drink or air confined in the tube between rollers may arise (for example, refer patent document 1).
JP-A-4-326196 (page 2-3, FIG. 1)

  However, the structure of the tube pump has a characteristic that a non-ejection zone corresponding to the number of tube rollers is generated while the rotating body rotates 360 degrees. That is, there is a position where the tube roller is detached from the tube, and a non-ejection zone is generated a plurality of times while the rotating body rotates 360 degrees.

  Therefore, the pulsation that repeatedly discharges and stops the coffee beverage is generated from the tube. Problems such as bubbles appear in the beverage.

  This invention is made | formed in view of such a point, and it aims at providing the drink extraction apparatus which can reduce the malfunction by the pulsation of a tube pump.

The beverage extraction device according to claim 1 is combined with an extraction container for extracting beverages supplied with extraction raw materials and hot water, and a filter on the lower side of the extraction container through a filter, and filtered from the extraction container through the filter. A liquid receiving block for receiving a beverage, a beverage delivery path for delivering the beverage received in the liquid receiving block, and a beverage delivery path provided in the middle of the beverage delivery path, wherein the inside of the liquid receiving block is set to a negative pressure from atmospheric pressure and the extraction container A tube pump that sucks the beverage received through the filter and sucks the beverage received in the liquid receiving block and discharges it to the downstream side of the beverage delivery path, a pump motor that rotationally drives the tube pump, and adjustment of the flavor of the beverage the rotational speed of the pump motor and a control unit for variably controlled by setting the duty ratio to said pump motor according to said tube A plurality of tubes each having one end connected in parallel to the upstream side of the beverage delivery path and each other end connected in parallel to the downstream side of the beverage delivery path, a tube for each of these tubes It has a plurality of rotating bodies provided with a plurality of tube rollers that rotate while being pushed along the longitudinal direction, and the relative positions in the rotation direction of the respective tube rollers are shifted for each of these rotating bodies.

The beverage extraction apparatus according to claim 2 is combined with an extraction container for extracting beverages supplied with extraction raw materials and hot water, and a filter on the lower side of the extraction container via a filter, and filtered from the extraction container through the filter. A liquid receiving block for receiving a beverage, a beverage delivery path for delivering the beverage received in the liquid receiving block, and a beverage delivery path provided in the middle of the beverage delivery path, wherein the inside of the liquid receiving block is set to a negative pressure from atmospheric pressure and the extraction container A tube pump that sucks the beverage received in the liquid receiving block and discharges it to the downstream side of the beverage delivery path, a pump motor that rotationally drives the tube pump, and the beverage delivery path A discharge port body that is provided at the tip and discharges after the beverage is retained, and each end of the tube pump feeds the beverage. A plurality of tubes connected in parallel to the upstream side of the path and each other end connected in parallel to the downstream side of the beverage delivery path, a plurality of these tubes rotating while pushing the tube along the longitudinal direction The tube rollers are provided with a plurality of rotating bodies, and the rotating positions of the respective tube rollers are shifted for each of the rotating bodies. The discharge port body is cylindrical and has a tangent to the upper side thereof. An inflow port through which the beverage flows in from the direction is provided .

Beverage extracting apparatus according to claim 3, wherein, in the beverage extraction device according to claim 1 Symbol placement, the front end of the beverage delivery line, in which are provided with a discharge port body to be discharged from the by staying a beverage.

The beverage extraction device according to claim 4 is the beverage extraction device according to claim 1 or 3 , further comprising a pressure sensor that detects a pressure in the liquid receiving block, and the controller is configured to operate the pump motor when the pump motor is driven. After the pressure sensor detects that the pressure in the liquid receiving block has approached atmospheric pressure from the negative pressure state and has reached a predetermined value, the drive of the pump motor is stopped at a predetermined timing.

The beverage extraction device according to claim 5 is the beverage extraction device according to claim 1 or 3 , further comprising a rotation number detection sensor that detects a rotation number of the pump motor, and the control unit is configured to drive the pump motor. The pump motor is stopped at a predetermined timing after the rotation speed detection sensor detects that the rotation speed of the pump motor has increased to a predetermined rotation speed value.

According to the beverage extraction device of claim 1, in the tube pump, each one end is connected in parallel to the upstream side of the beverage delivery path and each other end is connected in parallel to the downstream side of the beverage delivery path. It has a plurality of rotating bodies provided with a plurality of tubes and a plurality of tube rollers that rotate while pushing the tubes along the longitudinal direction for each tube, and the relative positions in the rotation direction of each tube roller for each of these rotating bodies Since there is a pulsation that repeatedly discharges and stops beverages from individual tubes, that is, there is a non-discharge zone, the tube pump as a whole can eliminate the non-discharge zone. When the liquid is poured into the cup, the liquid surface undulates due to pulsation, so that the beverage adheres to the upper side of the cup or air is entrained and bubbles are generated in the beverage. The case can be prevented. Furthermore, by variably controlling the rotation speed of the pump motor, it is possible to make a fine taste of the beverage.

According to the beverage extraction device of claim 2, in the tube pump, each one end is connected in parallel to the upstream side of the beverage delivery path and each other end is connected in parallel to the downstream side of the beverage delivery path. It has a plurality of rotating bodies provided with a plurality of tubes and a plurality of tube rollers that rotate while pushing the tubes along the longitudinal direction for each tube, and the relative positions in the rotation direction of each tube roller for each of these rotating bodies Since there is a pulsation that repeatedly discharges and stops beverages from individual tubes, that is, there is a non-discharge zone, the tube pump as a whole can eliminate the non-discharge zone. When the liquid is poured into the cup, the liquid surface undulates due to pulsation, so that the beverage adheres to the upper side of the cup or air is entrained and bubbles are generated in the beverage. The case can be prevented. Furthermore, the discharge port body has a cylindrical shape and is provided with an inflow port through which the beverage flows in from the tangential direction on the upper side thereof, so that even if there is a pulsation that repeatedly discharges and stops the beverage in the tube pump, The body can average and discharge the received beverage, and when the beverage is poured into the cup, the liquid surface is rippled by pulsation, so that the beverage adheres to the upper side of the cup or air is entrained and bubbles in the beverage It is possible to prevent problems such as

According to the beverage extraction device according to claim 3, wherein, in addition to the effects of the beverage extracting apparatus of claim 1 Symbol placement, the front end of the beverage delivery line, since there is provided a discharge port body to be discharged from the by staying a beverage In the tube pump, even if there is a pulsation that repeatedly discharges and stops the beverage, the discharged mouth body can average and discharge the received beverage, and when the beverage is poured into the cup, the liquid level undulates due to the pulsation Thus, it is possible to prevent such a problem that the beverage adheres to the upper side of the cup or air is entrained to generate bubbles in the beverage.

According to the beverage extraction device of claim 4, in addition to the effect of the beverage extraction device of claim 1 or 3 , when the beverage in the liquid receiving block runs out and becomes air when the pump motor is driven, the liquid receiving block Since the internal pressure approaches the atmospheric pressure from the negative pressure state and reaches a predetermined value, by detecting it with the pressure sensor, the drive of the pump motor can be stopped at an appropriate predetermined timing. Without lengthening such time, it is possible to solve problems such as scattering of the beverage remaining in the extraction container and the flavor and amount of the beverage not being appropriate.

According to the beverage extraction device of claim 5, in addition to the effect of the beverage extraction device of claim 1 or 3 , when the pump motor is driven, when the beverage is exhausted by the tube pump and air is sucked, Since the rotational speed of the pump motor increases to a predetermined rotational speed value, the pump motor drive can be stopped at an appropriate predetermined timing by detecting the rotational speed detection sensor. In addition, it is possible to eliminate problems such as scattering of beverage remaining in the extraction container and inadequate flavor and quantity of the beverage without increasing the time required for the extraction operation.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 3 and 4, the beverage extractor 11 is for extracting regular coffee made from coffee beans, for example, in a cup-type vending machine that provides the extracted coffee beverage in a cup C, It is installed in a tea machine.

  This beverage extraction device 11 has a raw material supply means 12 for supplying an extraction raw material, a hot water supply means 13 for supplying hot water, and a beverage extraction means 14 for extracting the beverage by mixing the extraction raw material and hot water.

  The raw material supply means 12 has a canister 21 for storing coffee beans. The canister 21 is provided with a feeding mechanism 23 for feeding a predetermined amount of coffee beans by driving a raw material motor 22. Below the canister 21, a mill 24 for pulverizing the coffee beans into powder is disposed. Therefore, from the raw material supply means 12, coffee powder is supplied to the beverage extraction means as an extraction raw material.

  The hot water supply means 13 has a hot water tank 26 for boiling and storing hot water of a predetermined temperature, and a hot water supply path 28 is connected to the hot water tank 26 via a hot water valve 27. By opening the hot water valve 27, hot water in the hot water tank 26 is supplied to the beverage extraction means 14 through the hot water supply path 28.

  Further, the beverage extraction means 14 has an extraction container 31 for extracting coffee beverage by mixing coffee powder and hot water, and a liquid receiving block 33 that is pressed against the lower side of the extraction container 31 with a band-like filter 32 interposed therebetween. Is arranged. The liquid receiving block 33 receives the coffee beverage filtered from the extraction container 31 through the filter 32.

  The filter 32 is made of strip-shaped paper or synthetic fiber. On one side of the liquid receiving block 33, a roll part 34 around which an unused filter 32 is wound is disposed, and the filter 32 drawn out from the roll part 34 is inserted between the extraction container 31 and the liquid receiving block 33. On the other side of the liquid receiving block 33, a filter feed roller 35 that feeds the filter 32 by rotating in the filter feed direction (clockwise direction in FIGS. 3 and 4) and a presser roller 36 that presses the filter 32 against the filter feed roller 35. And are arranged. Below the filter feed roller 35, a filter collection container (not shown) for collecting the used filter 32 fed by the filter feed roller 35 is disposed.

  The extraction container 31 is moved in the vertical direction by the extraction container moving mechanism 37, and the filter 32 is moved in the longitudinal direction of the filter 32 by the filter moving mechanism 38 including the filter feed roller 35 and the pressing roller 36. The extraction container moving mechanism 37 and the filter moving mechanism 38 are driven by a drive mechanism 40 having one drive motor 39.

  The liquid receiving block 33 is connected to a beverage delivery path 41 for sending coffee beverages to the cup C, and a tube pump 43 that is driven forward and backward by a pump motor 42 is connected to the beverage delivery path 41 in the middle. An air pressure detection type pressure sensor 44 that detects the pressure in the liquid receiving block 33 is connected between the tube pump 43 and the tube pump 43. At the tip of the beverage delivery path 41, a discharge port body 45 is connected for discharging the beverage to the cup C after temporarily retaining the beverage.

  In addition, the beverage extraction device 11 includes a control unit 46 that controls the beverage extraction device 11. The control unit 46 controls the raw material motor 22, the hot water valve 27, the mill 24, the drive motor 39, and the tube pump 43. A detection signal is input from the pressure sensor 44 to the control unit 46.

  As shown in FIGS. 5 to 7, the extraction container 31 has a substantially cylindrical shape, and a hemispherical receiving chamber 51 opening upward is formed in the upper half, and downward in the lower half. An open hemispherical mixing chamber 52 is formed. The receiving chamber 51 and the mixing chamber 52 communicate with each other through a communication portion having a smaller diameter than the openings on the upper and lower surfaces. A cap 53 is attached to the upper surface of the receiving chamber 51. The cap 53 is provided with a raw material inlet 54 into which coffee powder is introduced, a hot water nozzle 55 to which hot water is supplied, and the like.

  As shown in FIGS. 8 and 9, the liquid receiving block 33 has a block main body 58, and a liquid receiving portion 59 is provided at the center of the block main body 58. The liquid receiving part 59 has a funnel shape, the upper surface opening is formed in a shape corresponding to the lower surface opening of the extraction container 31, the small diameter pipe part 60 is formed in the lower part, and it continues from the upper surface opening toward the pipe part 60. Formed on the inclined surface. On the upper surface of the liquid receiving portion 59, a filter receiving portion 61 such as a wire mesh that supports the filter 32 and allows coffee drinks to pass therethrough, and a seal packing 62 provided around the filter receiving portion 61 are arranged.

  The block body 58 is formed with a pair of support plate portions 63 on both sides orthogonal to the longitudinal direction of the filter 32, and an unused filter 32 is placed on the liquid receiving portion 59 on one side corresponding to the longitudinal direction of the filter 32. A filter guide 64 for guiding is formed, and a filter guide roller 65 for guiding the used filter 32 is attached between the pair of support plate parts 63 on the other side, and a filter feed roller 35 and a presser roller 36 are attached respectively. It has been.

  The filter guide roller 65 is rotatably supported by the pair of support plate portions 63 by shafts 66 protruding from both ends.

  In the filter feed roller 35, a shaft 67 protruding from both ends is rotatably supported by a pair of support plate portions 63. The vicinity of both ends of the peripheral surface of the filter feed roller 35 is formed in a knurled shape. An end face of the shaft 67 is formed with a connecting hole 68 having an irregular shape other than a circular cross section. The connection hole 68 is configured as a connection portion with the drive mechanism 40.

  The presser roller 36 is attached to a shaft 70 that passes through a through hole 69 formed in the pair of support plate portions 63, and is attached between the both ends of the shaft 70 and the outer surface of the support plate portion 63. It is urged by a spring 71 as urging means in a direction in pressure contact with the filter feed roller 35. Two press rollers 36 are attached to the shaft 70 so as to correspond to the knurled portions near both ends of the filter feed roller 35.

  The through-hole 69 has a guide hole 72 that guides the presser roller 36 in a direction in which the presser roller 36 contacts and separates from the filter feed roller 35, and a separation holding hole 73 that holds the presser roller 36 at a position away from the filter feed roller 35. Are formed in a substantially L shape.

  The pair of support plate portions 63 of the liquid receiving block 33 are arranged on either side of the pair of support plate portions 63 of the liquid receiving block 33 with respect to the pair of liquid receiving block support plates 74 protruding from the drive mechanism 40. However, a support hole 75 is formed as a support receiving portion so as to be inserted and attached. After the liquid receiving block 33 is attached to the liquid receiving block support plate 74, a retaining process for preventing the liquid receiving block 33 from coming off from the liquid receiving block support plate 74 is performed.

  The liquid receiving block 33 configured in this manner is provided symmetrically on both sides in the direction orthogonal to the center line x along the longitudinal direction of the filter 32.

  As shown in FIGS. 5 to 6, the extraction container moving mechanism 37 includes a pair of swing arms 78 and a connecting portion 79 that connects intermediate portions of the swing arms 78 in a plan view. The oscillating body 80 is provided. One end of each swing arm 78 is rotatably supported by a swing shaft 82 with respect to the frame 81 of the beverage extraction device 11, and a connection shaft 83 is provided at the other end of each swing arm 78. Is engaged with connecting grooves 84 provided on both outer side surfaces of the extraction container 31. Therefore, the oscillating body 80 swings in the vertical direction with the swing shaft 82 as a fulcrum, so that the extraction container 31 moves integrally in the vertical direction. That is, the extraction container 31 moves to a lower position pressed against the liquid receiving block 33 via the filter 32 and an upper position separated from the filter 32 and the liquid receiving block 33 upward. The oscillating body 80 is urged downward by urging means (not shown) so that the extraction container 31 is pressed against the liquid receiving block 33 via the filter 32.

  The frame 81 is provided with a guide plate 85 that abuts on the side of the extraction container 31 and guides it so as to translate in the vertical direction of the extraction container 31. This is because when the oscillating body 80 oscillates about the oscillating shaft 82, the extraction container 31 moves up and down in an arc shape, but if the oscillating body 80 is not installed vertically on the liquid receiving block 33 via the filter 32, In some cases, the extraction container 31 is guided by the guide plate 85 so as to move vertically with respect to the liquid receiving block 33.

  A cam roller 86 is rotatably attached to the connecting portion 79 of the rocking body 80. The cam roller 86 abuts on a cam 87 disposed in the drive mechanism 40 and moves in the vertical direction according to the rotation of the cam 87 to which the drive force from the drive mechanism 40 is transmitted. Therefore, the extraction container 31 moves in the vertical direction via the cam roller 86 and the swinging body 80.

  Further, as shown in FIGS. 5, 8, and 9, the filter moving mechanism 38 receives the driving force from the driving mechanism 40 and rotates in the filter feed direction (clockwise direction in FIG. 9), causing the filter 32 to be elongated. The filter feed roller 35 feeds along the direction, and the presser roller 36 that presses the filter 32 against the filter feed roller 35.

  Further, as shown in FIGS. 5 to 9, the drive mechanism 40 has a pair of base plates 91 and 92, and a drive motor 39 is attached to the outside of one base plate 91 via a speed reduction unit 93.

  Between the pair of base plates 91 and 92, a drive gear 94, a filter drive gear 95, an idle gear 96, and an extraction container drive gear 97 are rotatably supported on each shaft so as to mesh with each other in order.

  The drive gear 94 is fixed to a drive shaft 98 to which the drive force of the drive motor 39 is transmitted.

  The filter drive gear 95 is attached to a shaft 99 that is rotatably mounted on a pair of base plates 91 and 92 via a filter one-way clutch 100. The end of the shaft 99 protruding from the other base plate 92 is connected to the connecting hole 68 of the shaft 67 of the filter feed roller 35 so that it can rotate integrally. The filter one-way clutch 100 transmits the driving force to the shaft 99 by coupling the filter drive gear 95 and the shaft 99 when the drive motor 39 rotates in the reverse direction and the filter drive gear 95 rotates in the clockwise direction in FIG. When the filter feed roller 35 is rotated in the filter feed direction, while the drive motor 39 rotates forward and the filter drive gear 95 rotates counterclockwise in FIG. 7, the coupling between the filter drive gear 95 and the shaft 99 is released. Thus, the driving force is not transmitted to the shaft 99, and the filter feed roller 35 is not rotated in the direction opposite to the filter feed direction.

  The idle gear 96 is attached to a shaft 101 that is rotatably mounted on a pair of base plates 91 and 92.

  The extraction container drive gear 97 is attached to a shaft 102 rotatably mounted on a pair of base plates 91 and 92 via an extraction container one-way clutch 103. A cam 87 having a small-diameter portion and a large-diameter portion on the peripheral surface is attached to the shaft 102, and the cam roller 86 of the rocking body 80 is disposed on the cam 87 so as to be able to come into contact therewith. The one-way clutch 103 for the extraction container is driven by the shaft 102 by coupling the extraction container drive gear 97 and the shaft 102 when the drive motor 39 rotates forward and the extraction container drive gear 97 rotates counterclockwise in FIG. Force is transmitted, and the cam 87 rotates together with the shaft 102 to move the extraction container 31 up and down via the cam roller 86, while the drive motor 39 reverses and the extraction container drive gear 97 rotates clockwise in FIG. When rotating, the engagement between the extraction container driving gear 97 and the shaft 102 is released, the driving force is not transmitted to the shaft 102, and the cam 87 is not rotated.

  The beverage delivery path 41 includes a tube, a connector, a pipe, a tube pump 43 and the like so as to be able to deliver the beverage. As shown in FIG. 6, between the liquid receiving block 33 and the tube pump 43, the tube 106 connected to the pipe portion 60 of the liquid receiving block 33, the two-way connector 107, the tube 108, and the three-way connection It is connected to the tube pump 43 via the tool 109 and the tube 110. Further, the tube 111 is connected between the tube pump 43 and the discharge port body 45.

  Further, as shown in FIG. 1, the tube pump 43 is configured in a double type in which a first pump unit 115 and a second pump unit 116 are arranged in parallel in the axial direction of a pump shaft 114 that is rotationally driven by a pump motor 42. Has been.

  Each pump section 115, 116 has an annular pump casing 117 with a pump shaft 114 inserted in the center, and a rotating body 118 attached to the pump shaft 114 is rotatably disposed in the pump casing 117. An intermediate portion of the tube 119 is disposed between the inner wall of the pump casing 117 and the rotating body 118. The rotating body 118 has an arm 120 attached to the pump shaft 114 and two tube rollers 121 rotatably supported at both ends of the arm 120. By rotating the rotating body 118, each tube roller 121 crushes the tube 119 and closes the inside, and the closed position is moved in the longitudinal direction of the tube 119 so that it is confined in the tube 119 between the two tube rollers 121. It has a pumping action to deliver beverage or air.

  One end of the tube 119 of each pump unit 115, 116 is connected in parallel to the tube 110 on the upstream side of the beverage delivery path 41 via the three connecting tools 122, and the other end is connected to the beverage via the three connecting tools 123. It is connected in parallel to the tube 111 on the downstream side of the delivery path 41.

  The first pump unit 115 and the second pump unit 116 are arranged such that the relative positions of the tube rollers 121 are shifted by 90 degrees.

  By rotating (forward rotation) the tube pump 43 in the pressurizing direction by the pump motor 42, air is fed into the liquid receiving block 33 to pressurize, while the tube pump 43 is rotated (reversed) in the suction direction. As a result, the inside of the liquid receiving block 33 is sucked and the coffee beverage is delivered to the discharge port body 45.

  Further, as shown in FIG. 6, the pressure sensor 44 is disposed at a position slightly higher than the liquid receiving block 33, is connected to the connection tool 109 via the tube 126, and the pressure in the liquid receiving block 33 is passed through the beverage delivery path 41. Can be detected.

  As shown in FIG. 10, the discharge port body 45 includes a discharge port container 129 and a lid body 130 that is attached to the upper surface of the discharge port container 129 in a state where air can flow. The discharge port container 129 has a cylindrical shape that opens up and down, and has a large-diameter portion 131 formed on the upper side and a small-diameter portion 132 formed on the lower side, and the large-diameter portion 131 and the small-diameter portion 132 are connected by an inclined surface. It is formed in a funnel shape. An inflow port 133 is formed from the tangential direction on the upper side of the large diameter portion 131, and the tube 111 is connected to the inflow port 133. The inside of the small-diameter portion 132 is configured as a discharge port 134 for discharging a beverage to the cup C.

  In addition, when the pump motor 42 that drives the tube pump 43 so as to suck the inside of the liquid receiving block 33 is driven, the control unit 46 causes the pressure in the liquid receiving block 33 to approach the atmospheric pressure from the negative pressure state. After the pressure sensor 44 has detected that the value has been reached, the pump motor 42 is stopped at a predetermined timing.

  Next, the operation of the beverage extraction device 11 will be described with reference to FIG.

  During standby, the extraction container 31 is in the lower position and is in pressure contact with the liquid receiving block 33 with the filter 32 in between (the state shown in FIG. 3).

  The raw material motor 22, the mill 24, and the hot water valve 27 are turned on by the operation start signal. Coffee beans in the canister 21 are supplied to the mill 24, and the coffee powder crushed by the mill 24 is dropped into the extraction container 31. At the same time, hot water in the hot water tank 26 is poured into the extraction container 31. Therefore, the coffee powder and hot water are mixed on the filter 32 in the extraction container 31.

  After a predetermined time of the operation start signal, the pump motor 42 starts to rotate the tube pump 43 in the pressurizing direction (forward rotation), and the time set in advance at the energization rate Q1 set in advance by the control unit 46 During T1, the pump motor 42 is driven and the operation of the tube pump 43 is continued. By the operation of the tube pump 43, the inside of the liquid receiving block 33 is pressurized with air, and the pressurized air passes through the filter 32 and rises as bubbles in the mixed liquid in the extraction container 31. The bubbles promote the stirring and mixing of the coffee powder and hot water, and the coffee beverage is extracted in a short time.

  After the elapse of time T1, the camera is kept stationary for a preset time T2.

  After stationary, the pump motor 42 starts rotating (reversely rotating) the tube pump 43 in the suction direction, and the pump motor 42 is driven at the energization rate Q2 set in advance by the control unit 46. Suction. As a result, the inside of the liquid receiving block 33 becomes a negative pressure from the atmospheric pressure, and among the mixed liquid in the extraction container 31, the coffee powder is captured by the filter 32, and only the coffee beverage is filtered by the filter 32 to the liquid receiving block 33. Fall. The coffee beverage that has fallen into the liquid receiving block 33 is sucked into the tube pump 43 and is pumped from the tube pump 43 to the discharge port body 45. The coffee beverage pumped to the discharge port body 45 flows out from the discharge port 134 of the discharge port body 45 and is poured into the cup C.

  By rotating (reversing) the tube pump 43 in the suction direction by the pump motor 42, the liquid receiving block 33 has a negative pressure from the atmospheric pressure, but when the liquid mixture is exhausted in the extraction container 31, Since the air in the extraction container 31 passes through the filter 32 and is sucked into the liquid receiving block 33, the suction load resistance is reduced, and the pressure in the liquid receiving block 33 approaches the atmospheric pressure. This pressure change is detected by the pressure sensor 44, and when the pressure approaching the atmospheric pressure reaches a level L set in advance by the control unit 46, the control unit 46 can detect that the mixed liquid is exhausted in the extraction container 31. . After the detection, the tube pump 43 is stopped after a time T3 preset by the control unit 46 has elapsed with a margin until the liquid mixture is surely eliminated in the extraction container 31.

  After the tube pump 43 is stopped, the tube motor 43 is rotated (normally rotated) in the pressurizing direction for a predetermined time by the pump motor 42 to pressurize the liquid receiving block 33. This is because the pressure in the liquid receiving block 33 has become a negative pressure from the atmospheric pressure in the previous process, and the filter 32 is in close contact with the filter receiving portion 61 and is difficult to move. This is to prevent the problem that the filter 32 cannot be fed even if it is rotated. By pressurizing the liquid receiving block 33, the filter 32 can be separated from the filter receiving portion 61 and the filter 32 can be easily moved.

  After the tube pump 43 is rotated (forward rotation) in the pressurizing direction for a predetermined time by the pump motor 42, the drive motor 39 is rotated in the normal rotation direction by a predetermined amount. During the forward rotation of the drive motor 39, the filter feed roller 35 does not rotate through the filter one-way clutch 100, and the cam 87 rotates through the extraction container one-way clutch 103. By rotating the cam 87 by a certain amount, the extraction container 31 is moved to the upper position and separated upward from the filter 32 and the liquid receiving block 33 (state shown in FIG. 4).

  After the drive motor 39 is rotated in a forward rotation direction by a predetermined amount, the drive motor 39 is stopped, and then the drive motor 39 is rotated in a reverse rotation direction for a preset time T4. During the reverse rotation of the drive motor 39, the filter feed roller 35 rotates in the filter feed direction via the filter one-way clutch 100, and the cam 87 does not rotate via the extraction container one-way clutch 103. By rotating the filter feed roller 35 in the filter feed direction, the used portion of the filter 32 that has captured the used coffee powder a is discharged from between the extraction container 31 and the liquid receiving block 33, and the filter 32 is not used. The used portion is supplied between the extraction container 31 and the liquid receiving block 33. The used portion of the discharged filter is collected in a collection container (not shown).

  After the time T4 has elapsed, the drive motor 39 is stopped, and then the drive motor 39 is rotated by a predetermined amount. During the forward rotation of the drive motor 39, the filter feed roller 35 does not rotate through the filter one-way clutch 100, and the cam 87 rotates through the extraction container one-way clutch 103. By rotating the cam 87 by a certain amount, the extraction container 31 is moved to the lower position, pressed against the liquid receiving block 33 with the filter 32 interposed therebetween, and returned to the standby state (the state shown in FIG. 3).

  In addition, each time T1, T2, T3, T4 and electricity supply rate Q1, Q2 etc. can adjust the flavor of a coffee drink by setting arbitrarily. The time T3 is useful for removing moisture from the extracted coffee powder captured by the filter 32. However, if it is too long, the time required for one beverage extraction will increase, so it is appropriate depending on the installation location and usage conditions. Set to a valid value. The level L is set to an appropriate value in consideration of the capacity of the tube pump 43, the capacity of the filter 32, and the type of coffee powder.

  By the way, as shown in FIG. 2, in the tube pump 43, in each pump part 115 and 116 using the two tube rollers 121, it is structurally the non-discharge zone | band twice, while the rotary body 118 rotates 360 degree | times. There is a characteristic that produces. That is, as shown in the first pump unit 115 of FIG. 1, the tube roller 121 is positioned away from the discharge-side tube 119, and the two tube rollers 121 are arranged at a position of 180 degrees. While the body 118 rotates 360 degrees, two non-ejection zones are generated. Therefore, the pulsation which repeats discharge and stop of a coffee drink arises from each tube 119. If the coffee beverage is poured into the cup C from only one tube 119, the beverage surface adheres to the upper side of the cup C due to pulsation, or air is entrained and bubbles are generated in the coffee beverage. Such troubles occur.

  The tube pump 43 is configured in a double type in which a first pump unit 115 and a second pump unit 116 are arranged in parallel in the axial direction of a pump shaft 114 that is rotationally driven by a pump motor 42. As shown in FIG. 2, there is a pulsation in which beverages are repeatedly discharged and stopped from the individual pump units 115 and 116 because the relative positions in the rotational direction of the tube rollers 121 are shifted for each rotating body 118. However, even if there is a non-discharge zone, the non-discharge zone can be eliminated from the tube pump 43 as a whole, which is a total of the discharge of beverages from the pumps 115 and 116, and the coffee beverage is poured into the cup C. In addition, it is possible to prevent problems such as the coffee surface adhering to the upper side of the cup C due to the pulsation of the liquid surface, or the occurrence of bubbles in the coffee beverage due to air entrainment.

  Furthermore, a discharge port body 45 that discharges the coffee beverage after it is retained is provided at the tip of the beverage delivery path 41. In this discharge port body 45, the coffee beverage flowing into the discharge port container 129 from the inflow port 133 descends while rotating along the inner wall of the large-diameter portion 131, that is, vortexes in the discharge port container 129. After staying, the liquid is discharged from the discharge port 134 of the small diameter portion 132 to the cup C. Therefore, as described above, even if there is a pulsation that repeatedly discharges and stops coffee beverages from the individual tubes 119 of the tube pump 43, the beverage outlet 45 can average and discharge the received beverage, When the liquid is poured into the cup C, it is possible to prevent such a problem that the liquid surface undulates due to pulsation, so that the beverage adheres to the upper side of the cup C or air is entrained and bubbles are generated in the beverage. Some pulsation also occurs in the double-type tube pump 43. By using this discharge port body 45 in combination, the influence of pulsation can be reduced more reliably.

  In addition, the control unit 46 can variably control the rotational speed of the pump motor 42 by controlling the energization rates Q1 and Q2 of the pump motor 42, thereby making it possible to make a fine taste of the coffee beverage.

  The timing at which the tube pump 43 stops the operation of sucking the coffee beverage from the extraction container 31 is generally set to the time from the start of the operation of the tube pump 43. The time is the amount and type of coffee powder. , And the amount of hot water. However, if the time from the start of the operation of the tube pump 43 is not set appropriately depending on the amount and type of coffee powder, the amount of hot water, etc., the coffee beverage still remains in the extraction container 31 but the tube The pump 43 is stopped, the extraction container 31 and the liquid receiving block 33 are separated from each other, and the coffee beverage remaining in the extraction container 31 flows out and is scattered, or the flavor of the coffee beverage provided to the cup C There is a problem that the amount does not become the prescribed one. In order to prevent such a problem, it may be possible to set a long time from the start of the operation of the tube pump 43. However, there is a problem that it takes a long time to extract one beverage.

  Therefore, in the beverage extraction device 11, when the pump motor 42 that drives the tube pump 43 to suck the inside of the liquid receiving block 33 is driven, when the liquid mixture in the liquid receiving block 33 runs out and becomes air, the liquid receiving block Since the pressure in 33 approaches the atmospheric pressure from the negative pressure state and reaches a predetermined value, by detecting it with the pressure sensor 44, the drive of the pump motor 42 can be stopped at an appropriate predetermined timing, Without prolonging the time required for the extraction operation, it is possible to solve problems such as scattering of the mixed liquid remaining in the extraction container 31 and the flavor and amount of the coffee beverage in the cup C not being appropriate.

  Next, FIG. 12 and FIG. 13 show a second embodiment.

  In the first embodiment, when the pump motor 42 that drives the tube pump 43 so as to suck the liquid receiving block 33 is driven, the pump motor 42 is controlled to stop based on the pressure sensor 44. In the second embodiment, the pump motor 42 is controlled to stop based on a change in the rotational speed of the pump motor 42.

  As shown in FIG. 12, a magnet 143 is arranged at one place of a rotating plate 142 attached to the drive shaft 141 of the pump motor 42, and a hall element 144 is arranged in the case of the pump motor 42 so as to face the rotation area of the magnet 143. Thus, a rotational speed detection sensor 145 that detects the rotational speed of the pump motor 42 is configured. A reduction gear mechanism 146 is interposed between the drive shaft 141 of the pump motor 42 and the pump shaft 114 of the tube pump 43.

  The controller 46 detects that the rotation speed of the pump motor 42 has increased to a predetermined value when the pump motor 42 is driven, and then drives the pump motor 42 at a predetermined timing. Has a function to stop.

  Then, rotation (reverse rotation) of the tube pump 43 in the suction direction is started by the pump motor 42 and the inside of the liquid receiving block 33 is sucked, so that the pressure in the liquid receiving block 33 is reduced from the atmospheric pressure to the inside of the extraction container 31. Among the mixed liquid, the coffee powder is captured by the filter 32, and only the coffee drink is filtered by the filter 32 and falls to the liquid receiving block 33. The coffee drink that has fallen to the liquid receiving block 33 is sucked into the tube pump 43. Discharge from tube pump 43.

  While the pump motor 42 is being driven, a pulse corresponding to the rotational speed of the pump motor 42 is output from the rotational speed detection sensor 145.

  As shown in FIG. 13, when the mixed liquid is present in the extraction container 31 and the coffee liquid is sucked by the tube pump 43, the rotation speed of the tube pump 43 is reduced due to the suction load resistance. The pitch P1 of the pulses output from 145 is in a sparse state.

  When there is no mixed liquid in the extraction container 31, the air in the extraction container 31 passes through the filter 32 and is sucked into the tube pump 43 from the liquid receiving block 33, so the suction load resistance is reduced and the rotation speed of the tube pump 43 Therefore, the pitch P2 of the pulses output from the rotation speed detection sensor 145 becomes a dense state.

  Therefore, when the pump motor 42 that drives the tube pump 43 to suck the liquid receiving block 33 is driven, the rotation speed of the pump motor 42 is monitored by monitoring the pitch of the pulses output from the rotation speed detection sensor 145. If the value becomes higher than the value of the predetermined rotational speed, the driving of the pump motor 42 can be stopped at an appropriate predetermined timing. Therefore, without lengthening the time required for the extraction operation, it is possible to solve problems such as scattering of the coffee beverage remaining in the extraction container 31 and the flavor and amount of the coffee beverage in the cup C not being appropriate. .

  Note that a DC brushless motor may be used as the pump motor 42, and rotation speed control and rotation speed detection may be performed by a single integrated circuit.

  In addition, the tube pump 43 is configured by the two pump units 115 and 116, but is not limited thereto, and may be configured by three or more pump units.

  The beverage to be extracted is not limited to a coffee beverage, but may be tea or tea extracted from tea leaves.

It is a block diagram of the tube pump of a drink extraction apparatus same as the above which shows the 1st Embodiment of this invention. It is a timing chart which shows the relationship between the rotation angle and discharge amount of a tube pump same as the above. It is a block diagram in the standby or extraction of a drink extraction apparatus same as the above. It is a block diagram in the middle of filter feed of a drink extractor same as the above. It is a perspective view of a drink extraction apparatus same as the above. It is sectional drawing seen from the side surface direction of the same beverage extraction apparatus. It is sectional drawing seen from the front direction of the drink extracting device same as the above. It is a top view of the liquid receiving block and drive mechanism of a drink extraction apparatus same as the above. It is sectional drawing seen from the front direction of a liquid receiving block same as the above. The discharge outlet body of a drink extraction device same as the above is shown, (a) is a plan view with the lid removed, and (b) is a cross-sectional view seen from the side. It is a timing chart of the beverage extraction operation | movement of a drink extraction apparatus same as the above. It is sectional drawing which shows the tube pump and pump motor of the beverage extraction apparatus which show the 2nd Embodiment of this invention. It shows the relationship between the extraction container of the same beverage extraction device and the rotation of the pump motor.

Explanation of symbols

11 Beverage extractor
31 Extraction container
32 filters
33 Liquid receiving block
41 Beverage delivery path
42 Pump motor
43 Tube pump
44 Pressure sensor
45 Discharge port
46 Control unit
118 Rotating body
119 tubes
121 Tube roller
133 inlet
145 revolution detection sensor

Claims (5)

An extraction container that is supplied with extraction raw materials and hot water to extract a beverage;
A liquid receiving block which is combined with a lower side of the extraction container through a filter and receives a beverage filtered through the filter from the extraction container;
A beverage delivery path for delivering the beverage received in the liquid receiving block;
The beverage delivery path is provided in the middle of the beverage delivery path, and the interior of the liquid receiving block is set to a negative pressure from atmospheric pressure so that the beverage in the extraction container is sucked through the filter, and the beverage received in the liquid receiving block is sucked in. A tube pump that discharges to the downstream side of
A pump motor that rotationally drives the tube pump;
A controller that variably controls the number of rotations of the pump motor by setting an energization rate to the pump motor according to the adjustment of the flavor of the beverage,
The tube pump includes a plurality of tubes each having one end connected in parallel to the upstream side of the beverage delivery path and each other end connected in parallel to the downstream side of the beverage delivery path. It has a plurality of rotating bodies provided with a plurality of tube rollers that rotate while pushing the tube along the longitudinal direction, and the relative positions in the rotating direction of each tube roller are shifted for each rotating body. Beverage extraction device characterized. An extraction container that is supplied with extraction raw materials and hot water to extract a beverage;
A liquid receiving block which is combined with a lower side of the extraction container through a filter and receives a beverage filtered through the filter from the extraction container;
A beverage delivery path for delivering the beverage received in the liquid receiving block;
The beverage delivery path is provided in the middle of the beverage delivery path, and the interior of the liquid receiving block is set to a negative pressure from atmospheric pressure so that the beverage in the extraction container is sucked through the filter, and the beverage received in the liquid receiving block is sucked in. A tube pump that discharges to the downstream side of
A pump motor that rotationally drives the tube pump;
It is provided at the tip of the beverage delivery path, and comprises a discharge port body that discharges after retaining the beverage,
The tube pump includes a plurality of tubes each having one end connected in parallel to the upstream side of the beverage delivery path and each other end connected in parallel to the downstream side of the beverage delivery path. It has a plurality of rotating bodies provided with a plurality of tube rollers that rotate while pushing the tube along the longitudinal direction, and the relative positions in the rotating direction of each tube roller are shifted for each of these rotating bodies,
The said discharge outlet body is cylindrical, The inflow port into which a drink flows in from the tangential direction is provided in the upper part side. The drink extraction apparatus characterized by the above-mentioned. The beverage extraction device according to claim 1, further comprising a discharge port body that discharges the beverage after the beverage is retained at a tip of the beverage delivery path. Comprising a pressure sensor for detecting the pressure in the liquid receiving block;
When the pump motor is driven, the pressure sensor detects that the pressure in the liquid receiving block has approached atmospheric pressure from a negative pressure state and has reached a predetermined value, and then the pump at a predetermined timing. The drive of a motor is stopped. The drink extraction device according to claim 1 or 3 characterized by things. Comprising a rotational speed detection sensor for detecting the rotational speed of the pump motor;
The controller drives the pump motor at a predetermined timing after the rotation speed sensor detects that the rotation speed of the pump motor has increased to a predetermined rotation speed value when the pump motor is driven. The beverage extraction device according to claim 1 or 3 , wherein the beverage extraction device is stopped.

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