JP6024517B2 - Beverage extractor - Google Patents

Description

  The present invention relates to a beverage extractor that is incorporated in a cup-type beverage vending machine, a beverage dispenser, and the like and extracts coffee, tea-based beverages, and the like using raw materials such as ground coffee beans and ground tea leaves and hot water.

  Conventionally, as this type of beverage extraction device, for example, the one disclosed in Patent Document 1 already filed by the present applicant is known. This beverage extraction device is applied to a cup-type beverage vending machine or the like, and uses a predetermined raw material and hot water to extract a beverage such as coffee. A cylindrical cylinder having an open upper surface and a lower surface; It has a filter for filtering beverage, and is provided with a filter block provided below the cylinder so as to be able to move up and down, and a scraper for discharging the extracted residue that is a raw material remaining on the filter after the beverage is extracted. .

  In this beverage extraction device, when a beverage is extracted, first, the filter block is raised to seal the lower surface of the cylinder. Next, raw materials and hot water are supplied to the cylinder, and the beverage is extracted in the cylinder. The extracted beverage passes through the inside of the filter block and is carried out to the outside while being filtered by the filter of the filter block. Next, when the filter block is lowered, the lower surface of the cylinder is opened, and the extraction soot remains on the filter of the filter block. Thereafter, the scraper slides on the filter block to scrape and discard the extracted soot on the filter.

JP 2008-171382 A

  In the beverage extraction device described above, air is sent to the filter block by operating the air pump for a predetermined time (for example, several seconds). The air sent from the air pump passes through the filter of the filter block and forcibly agitates the raw material and hot water in the cylinder. And if steam generated from the water that is forcibly stirred in the cylinder enters the coffee bean crushing device, it will block the raw material passage and make it impossible to sell beverages. The steam is forcibly discharged to the outside.

  Thus, conventionally, in the beverage extraction device, since the raw material and hot water supplied to the cylinder are mixed in succession, the raw material and hot water are forcibly agitated by the air sent from the filter of the filter block by the air pump. Thus, the quality variation of the extracted beverage was reduced.

  However, the fine powder generated when the raw materials such as coffee beans are pulverized, the powder is lifted up in a lump state by the oil components and pulverized particles of the coffee beans, or the water of the powder lump is repelled. Since the mixed state was not stable, the quality of the beverage extracted by the beverage extraction device was unstable. In order to stabilize the quality of this extracted beverage, it is necessary to forcibly stir the raw material and hot water for a long time, and a cup-type beverage vending machine that is required to provide a stable beverage with high temperature quality in a short time In beverage dispensers such as coffee and coffee servers, it has been a problem to provide a stable beverage with high quality in a short time.

  Furthermore, the steam generated from the water that is forcibly stirred in the cylinder is provided with a dedicated steam exhaust device so that it can be forced out of the exhaust duct, leading to an increase in the size of the beverage extraction device. Therefore, raising the manufacturing cost has been an issue.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a beverage extraction device that can extract a beverage having a small size, low cost, and stable quality in a short time.

In order to achieve the above object, a beverage extraction device according to claim 1 of the present invention is a beverage extraction device for extracting a beverage using raw materials and hot water,
An extraction container for opening the upper and lower surfaces and extracting the beverage inside;
A filter is provided on the upper surface, and can be moved up and down between a sealing position for sealing the lower surface of the extraction container below the extraction container and an open position lower than the sealing position and for opening the lower surface of the extraction container. When the beverage is extracted in the extraction container when it is located at the sealing position and the beverage carried out of the extraction container passes, a beverage filtration unit that filters the beverage with the filter,
In a beverage extraction device comprising:
It further includes a premixing device that receives the raw material and hot water and generates a raw material mixture that has been pre-stirred and mixed, and supplies the raw material mixture from the upper surface opening of the extraction container,
The premixing device is formed in a cylindrical shape whose both end faces are closed, and the cylinder body is provided with an opening for receiving the raw material and discharging the raw material mixture to the extraction container, and the closed one side A hot water nozzle for injecting the hot water into the supplied raw material is provided on the end face of
When the raw material mixture is generated by the premixing device and supplied to the extraction container, an opening of the premixing device is arranged on the upper surface to receive the raw material from the opening, and then the premixing device The raw material mixture in which the opening is arranged on the lower surface by rotating the jet and the hot water is jetted from the hot water nozzle into the received raw material and pre-stirred and mixed is supplied to the extraction container from the opening. And

  The beverage extraction device according to claim 2 of the present invention is the beverage extraction device according to claim 1, wherein the raw material is washed from the inner wall surface of the premixing device into the extraction container with the hot water sprayed from the hot water nozzle. It is characterized by that.

  The beverage extraction device according to claim 3 of the present invention is the beverage extraction device according to claim 1 or 2, wherein the premixing device generates steam generated from the raw material mixture supplied into the extraction container. The raw material crusher is protected by being cut off from the raw material crusher.

  According to a fourth aspect of the present invention, there is provided the beverage extraction apparatus according to any one of the first to third aspects described above, wherein the premixing device is interlocked with a filtration unit elevating mechanism that elevates and lowers the beverage filtration unit. And rotating.

  Further, the beverage extraction device according to claim 5 of the present invention is the above-described beverage extraction device according to claim 1, wherein the filter has a dimple shape on the upper side of the filtration hole for filtering the beverage, and a hot water film is formed on the dimple. The sliding resistance at the time of sliding of the extraction waste disposal scraper after beverage extraction from the raw material mixture is reduced.

  According to invention of Claim 1, it is a drink extraction apparatus for extracting a drink using a raw material and hot water, Comprising: The upper surface and the lower surface are open | released, The extraction container for extracting a drink inside, and a filter It is provided on the upper surface, and is provided below the extraction container so as to be movable up and down between a sealing position that seals the lower surface of the extraction container and an open position that is lower than the sealing position and opens the lower surface of the extraction container. In a beverage extraction apparatus comprising: a beverage extraction unit that extracts a beverage in an extraction container when positioned, and a beverage filtration unit that filters the beverage with a filter when the beverage transported from the extraction container passes through A raw material mixture is generated by receiving hot water and pre-stirred and mixed, and further provided with a pre-mixing device for supplying the raw material mixture from the upper surface opening of the extraction container. Formed in a cylindrical shape with the surface closed, the cylinder body receives the raw material and is provided with an opening for discharging the raw material mixture into the extraction container. On one of the closed end surfaces, hot water is injected into the supplied raw material. When a raw material mixture is generated by the premixing device and supplied to the extraction container, the opening of the premixing device is arranged on the upper surface to receive the raw material from the opening, and then the premixing device is rotated. By supplying hot water from the hot water nozzle to the received raw material with the opening placed on the lower surface and supplying the raw material mixture that has been pre-stirred and mixed through the opening to the extraction container, The raw material and hot water are forcibly pre-stirred and mixed in the mixing device to efficiently mix the raw material and hot water, and the fully mixed raw material mixture is put into the extraction container in the same time as the hot water supply time. Rukoto can. As a result, a beverage extraction device that improves extraction efficiency, eliminates variations in the degree of stirring and mixing due to raw materials and hot water temperature, achieves stable extraction, and can extract beverages with stable quality in a short time with a small size and low cost. It becomes possible to provide.

  According to the invention of claim 2, the inner wall surface of the premixing device can always be kept clean by washing the raw material from the inner wall surface of the premixing device into the extraction container with the hot water sprayed from the hot water nozzle.

  According to the invention of claim 3, the premixing device protects the raw material crushing device by blocking the steam generated from the raw material mixture supplied in the extraction vessel from the raw material crushing device. The steam generated from the raw material mixture in the raw material crusher does not rise to the raw material passage of the raw material crushing device and does not invade, so that the clogging of the raw material passage of the raw material crushing device is protected and the beverage cannot be sold. Can be prevented. This eliminates the need to provide a dedicated steam exhaust system and forcibly exhaust steam to the outside via the exhaust duct, eliminating the need for a dedicated steam exhaust system that is expensive and takes up space. Therefore, it is possible to provide a beverage extraction apparatus that can extract a beverage with stable quality in a short time at a low cost.

  Moreover, according to invention of Claim 4, a premixing apparatus can provide a small and low-cost drink extraction apparatus by rotating in conjunction with the filtration part raising / lowering mechanism which raises / lowers a beverage filtration part. .

  According to the invention of claim 5, the filter has a dimple shape on the upper side of the filtration hole for filtering the beverage, and a hot water film is formed on the dimple so that the extracted waste disposal scraper after the beverage is extracted from the raw material mixture. By reducing the sliding resistance at the time of sliding, it is possible to reduce the size of the scraper sliding motor and reduce the cost of the scraper, and to provide a small and low-cost beverage extraction device.

It is a figure which shows typically the internal structure of the cup-type drink vending machine provided with the drink extracting device which is embodiment of this invention. It is a control block diagram of the cup-type drink vending machine provided with the drink extraction apparatus shown in FIG. It is an external appearance perspective view which shows the drink extraction apparatus which is embodiment of this invention. It is an external appearance perspective view which shows the raw material reception part which installed the pre-mixing apparatus of the beverage extraction apparatus which is embodiment of this invention. It is an external appearance perspective view which shows the pre-mixing apparatus of the drink extraction apparatus which is embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a cross-sectional perspective view which shows the raw material receiving part which installed the premixing apparatus of the beverage extraction apparatus which is embodiment of this invention, (a) is the figure which has arrange | positioned the opening of a premixing apparatus in the lower surface, (b) is It is the figure which has arrange | positioned the opening of a premixing apparatus on the upper surface. It is a cross-sectional side view which shows the standby position and hot water supply of the drink extraction apparatus shown in FIG. 3, and the pre-stirring mixing position of a raw material and hot water. It is a cross-sectional side view which shows the raw material powder receiving position of the drink extracting device shown in FIG. It is a cross-sectional side view which shows the extraction basket disposal position of the drink extracting device shown in FIG. It is an external appearance perspective view which shows the standby position and hot water supply of the beverage extraction part of the beverage extraction apparatus shown in FIG. 3, and the pre-stirring mixing position of a raw material and hot water. It is an external appearance perspective view which shows the raw material powder receiving position of the drink extraction part of the drink extracting device shown in FIG. It is an external appearance perspective view which shows the extraction basket disposal position of the drink extraction part of the drink extracting device shown in FIG. It is an oblique rear view which shows the standby position of the drink extraction part of the drink extracting apparatus shown in FIG. It is an oblique rear view which shows the extraction basket disposal position of the drink extraction part of the drink extracting device shown in FIG. It is the elements on larger scale which show the dimple shape of the filtration hole of a filter. It is a figure which shows the drink extraction process of the drink extracting device which is embodiment of this invention.

Hereinafter, preferred embodiments of a beverage extraction device according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.
The beverage extraction device of this embodiment is incorporated in a cup-type beverage vending machine or beverage dispenser, and extracts coffee or tea-based beverages using raw materials such as ground coffee beans or ground tea leaves and hot water. is there.

  FIG. 1 schematically shows the internal structure of a cup-type beverage vending machine provided with a beverage extraction device according to an embodiment of the present invention. As shown in the figure, a cup-type beverage vending machine 1 uses a coffee extraction device (beverage extraction device) 2 to extract coffee (beverage) using ground coffee beans (raw material) and hot water (hot water). It is to provide.

  The cup-type beverage vending machine 1 includes a coffee extraction device 2, a raw material supply device 3 that supplies a predetermined amount of ground coffee beans and hot water to the coffee extraction device 2, a hot water supply device 4, and air delivery and extraction liquid, respectively. A suction gear pump 5 is provided. These are controlled by the control unit 90 as shown in FIG.

  The raw material supply device 3 includes a raw material canister (raw material storage device) 3a that stores coffee beans, and a mill (raw material pulverization device) 3b that grinds the coffee beans supplied from the raw material canister 3a into ground coffee beans. At the time of coffee extraction, the coffee beans supplied from the raw material canister 3 a to the mill 3 b are ground into a powder by the mill 3 b, and the ground coffee beans (hereinafter also referred to as “raw material”) are supplied to the coffee extraction device 2.

  The hot water supply device 4 includes a hot water tank 4a for storing hot water heated by a heater (not shown), and a hot water valve 4b composed of an electromagnetic valve, and opens the hot water valve 4b during coffee extraction. Thus, a predetermined amount of hot water is supplied from the hot water tank 4a to the coffee extraction device 2 via the hot water supply pipe 4c.

  The gear pump 5 takes in air from the pipe 5b when the pump 5a is rotated in one direction, and sends out the taken air to the pipe 5c. When the pump 5a is rotated in the other direction, the gear pump 5 passes through the pipe 5c. It is a pump that serves to discharge sucked coffee from the pipe 5b and supply it to a beverage container such as a cup. When the pump 5a is rotated in one direction, the air taken in from the pipe 5b by the pump 5a is supplied into the cylinder 22 from the filter block (beverage filtration unit) 23 of the coffee brewing device 2 through the pipe 5c. The coffee grounds and hot water raw material mixture charged in the cylinder 22 are stirred to extract coffee. When the pump 5a is rotated in the other direction, the coffee extracted in the cylinder 22 is filtered by the filter 24 of the filter block 23 and passes through the inside of the filter block 23 (see FIGS. 7 and 10 above). ), Sucked by the gear pump 5, taken out to the outside through the pipes 5 c and 5 b, poured into a beverage container such as a cup, and provided to the user of the cup-type beverage vending machine 1.

  FIG. 2 is a block diagram showing the control of the cup-type beverage vending machine 1 provided with the coffee brewing device 2. The control unit 90 for controlling the beverage extraction and the like in the cup-type beverage vending machine 1 is a central processing unit. A CPU 91 as a device, a ROM (Read Only Memory) 92 for storing a control program for the CPU 91, and a RAM (Random Access Memory, for example, a raw material canister 3a) for storing various programs and data necessary for the control of the CPU 91 as needed. Stores time for supplying coffee beans and time for opening hot water valve 4b) 93, timer 94 for counting clocks generated by a reference clock generator (not shown), and measuring various times, automatic cup-type beverage It is comprised from the electricity supply part 95 which has a power circuit which supplies with electricity to each apparatus with which the sales machine 1 is equipped.

  The controller 90 inputs various setting data of the cup-type beverage vending machine 1 (for example, the time when the raw material canister 3a supplies the coffee beans and the time when the hot water valve 4b is opened) or the rotor 35. A rotor angle sensor 97 for detecting the rotation angle (see FIGS. 13 and 14) is connected.

  Then, based on the information stored in the RAM 93 and the information output from the rotor angle sensor 97, the control unit 90 supplies the material canister 3a, the mill 3b, the hot water valve 4b, the gear pump 5, the rotor drive motor 98, and the like. Energization control is performed.

  Next, the coffee extraction device 2 will be described in detail. 3 is an external perspective view showing the coffee brewing apparatus 2 according to the embodiment of the present invention, FIG. 4 is an external perspective view showing the raw material receiving portion 43 provided with the premixing device 21, and FIG. FIG. 6 is an external perspective view showing the mixing device 21, FIG. 6 is a cross-sectional perspective view showing a raw material receiving portion 43 provided with the pre-mixing device 21, and FIG. 6A shows the opening 21 b of the pre-mixing device 21 on the lower surface. FIG. 2B is a diagram in which the opening 21b of the premixing device 21 is arranged on the upper surface.

  7 is a cross-sectional side view showing the standby position and hot water supply of the coffee extraction device 2, and the pre-stirring mixing position of the raw material and hot water, and FIG. 8 is a cross-sectional side view showing the raw material powder receiving position of the coffee extraction device 2. FIG. 9 is a cross-sectional side view of the coffee grounds disposal position of the coffee brewing apparatus 2.

  Further, FIG. 10 is an external perspective view showing the standby position and hot water supply of the coffee extraction device 2 and the pre-stirring mixing position of the raw material and hot water, and FIG. 11 is an external perspective view showing the raw material powder receiving position of the coffee extraction device 2. FIG. 12 is an external perspective view showing the extraction ground disposal position of the coffee extraction device 2.

FIG. 13 is an oblique rear view showing the standby position of the coffee extraction device 2, and FIG. 14 is an oblique rear view showing the extraction basket discarding position of the coffee extraction device 2.
As shown in the figure, the coffee extraction apparatus 2 includes an extraction unit 20 for extracting coffee, a raw material mixture in which raw materials (coffee ground beans and ground tea leaves, etc.) and hot water are received and mixed with stirring in advance. A premixing device 21 that generates a body and supplies the raw material mixture from the upper surface opening 22a of the cylinder 22, and a drive unit (filtering) that rotates the premixing device 21 and moves the filter block (beverage filtration unit) 23 up and down. (Part raising / lowering mechanism) 30 (see FIGS. 13 and 14) and a unit main body 40 to which the extraction unit 20 and the drive unit 30 are attached. The unit main body 40 is provided with a right panel 41 and a left panel 42, and is mounted in the cup type beverage vending machine 1 casing.

  The extraction unit 20 is a cylinder (extraction vessel) in which the upper surface and the lower surface for extracting coffee are opened from the raw material mixture in which the raw material and hot water are pre-stirred and mixed and supplied from the premixing device 21. 22 and a filter block 23 for discharging the coffee in the cylinder 22 to the outside while filtering.

  The premixing device 21 receives the raw material supplied from the raw material supply device 3 into the cylindrical body 21a formed in a cylindrical shape, and discharges the raw material mixture in which the received raw material and hot water are pre-stirred and mixed to the cylinder 22. An opening 21b is provided, and both end surfaces are closed by a cylinder lid 21c that is attached in such a manner as to close the open end of the cylinder body 21a. A gear 21d is formed coaxially with the cylinder main body 21a on one end face of the closed cylinder main body 21a, and the hot water valve 4b is opened to supply the hot water tank 4a through the hot water supply line 4c. A hot water nozzle 21e for injecting the hot water into the raw material supplied from the raw material supply device 3 through the opening 21b is provided.

  Further, the premixing device 21 is rotatably installed in the raw material receiving portion 43 provided with the raw material chute 43a, and the raw material receiving portion 43 in which the premixing device 21 is rotatably installed is the unit main body 40. Is detachably disposed. The premixing device 21 rotates as the slider main body 36 described later moves up and down.

  The cylinder 22 is made of plastic, and is formed in a cylindrical shape that extends in the vertical direction and opens the upper surface opening 22a and the lower surface opening 22b. A guide portion 22 c that is used when the cylinder 22 is attached to and detached from the unit main body 40 is provided on the outer peripheral surface of the cylinder 22.

  The filter block 23 includes a circular filter 24 for filtering coffee, a wide ring-shaped packing 25 provided so as to surround the filter 24, and a coffee receiving portion 26 that receives the coffee filtered by the filter 24. It consists of and. And the pipe 5c for discharging | emitting the coffee filtered by the filter 24 is connected to the coffee receiving part 26, coffee is attracted | sucked out of the coffee receiving part 26 by the gear pump 5, and it is carried out to drink containers, such as a cup. Provided to be poured.

  The filter 24 is made of a thin plate-like metal plate that is slightly smaller than the inner diameter of the lower surface opening 22b of the cylinder 22, and the filtration hole 24a for filtering the beverage is formed of a large number of pores having a predetermined diameter (for example, 20 μm). A dimple 24b having a diameter of about 100 μm and a depth of 5 to 10 μm is formed on the upper side of the filtration hole 24a (see FIG. 15).

  The filter block 23 configured as described above includes a seal position (see FIGS. 7 and 10) for sealing the lower surface opening 22 b of the cylinder 22 by the drive unit 30, and a lower surface opening of the cylinder 22 below the seal position. It is driven to move up and down between an open position (see FIGS. 8, 9, 11, and 12) that opens 22b.

  The drive unit 30 is configured by a cam mechanism 34 that raises and lowers the filter block 23 by raising and lowering the slider body 36. When the filter block 23 is positioned at the seal position, the upper surface of the packing 25 is the lower peripheral edge of the cylinder 22. This is held in contact with the part and sealed.

  The cam mechanism 34 includes a rotor 35 that rotates via a gear 35c when driven by a rotor drive motor 98, a cam 37 in which an outer peripheral edge 35b of a disk portion 35a of the rotating rotor 35 is inscribed, and a premixing device. And a slider main body 36 integrally having a rack 38 for rotating 21.

  When the rotor 35 is rotationally driven by the rotor drive motor 98, the outer peripheral edge 35b of the disk portion 35a rotates in contact with the inner peripheral edge 37a of the cam 37, and this disk portion 35a is inwardly connected to the inner peripheral edge 37a of the cam 37. The slider body 36 is raised by rotating in contact and rising (see FIG. 13), and the slider body 36 is lowered by rotating and lowering the disk portion 35a in contact with the inner peripheral edge 37a of the cam 37. (See FIG. 14).

  Next, the premixing device 21 that rotates as the slider body 36 moves up and down will be described. A rack 38 provided in the slider body 36 is engaged with a pinion (gear) 39, and a gear 21 d provided coaxially with the premixing device 21 is engaged with the pinion 39.

  When the slider main body 36 is raised (see FIGS. 7, 10, and 13), the rack 38 provided on the slider main body 36 is also raised, and the pinion 39 and the gear 21d are rotated as the rack 38 is raised. Thus, as shown in FIGS. 7 and 10, the premixing device 21 rotates and stops at a position where the opening 21b is opened on the lower surface. Then, the filter block 23 stops at a sealing position where the lower surface opening 22b of the cylinder 22 is sealed.

  When the slider main body 36 is lowered (see FIGS. 8 and 11), the rack 38 provided on the slider main body 36 is also lowered. As the rack 38 is lowered, the pinion 39 and the gear 21d are rotated in advance. As shown in FIGS. 8 and 11, the mixing device 21 rotates and stops at a position where the opening 21b is opened on the upper surface. The filter block 23 stops at an open position where the lower surface opening 22b of the cylinder 22 is opened.

  When the slider body 36 is further lowered (see FIGS. 9, 12, and 14), the rack 38 provided on the slider body 36 is further lowered, and the pinion 39 and the gear 21d are rotated as the rack 38 is lowered. Thus, as shown in FIGS. 9 and 12, the premixing device 21 rotates and stops at a position where the opening 21b is opened on the lower surface. Then, when the scraper body 27a moves on the filter block 23, the scraper 27 slides on the upper surface of the filter 24, scrapes off the extraction residue remaining on the filter 24, and discards it.

  In the cup-type beverage vending machine 1 equipped with the coffee extraction device 2 described above, the process of extracting coffee will be described in detail with reference to the process diagram of FIG. First, at the standby position shown in FIG. 16A, when a coffee extraction signal is output from the CPU 91 of the controller 90 and the rotor drive motor 98 is energized, as shown in FIG. Is rotated by the rotor drive motor 98, and the disk portion 35a rotating in contact with the inner peripheral edge 37a of the cam 37 is lowered, so that the slider body 36 is lowered, and the opening 21b of the premixing device 21 is opened on the upper surface. The filter block 23 is lowered from the seal position to the open position. And by supplying electricity to the raw material canister 3a and the mill 3b, ground coffee beans are supplied from the raw material chute 43a into the premixing device 21 through the opening 21b.

  Then, after the ground coffee beans are supplied into the premixing device 21, as shown in FIG. 16C, when the rotor 35 is rotated by energizing the rotor drive motor 98, the inner peripheral edge 37 a of the cam 37. As the disk portion 35a that is inscribed and rotated rises, the slider main body 36 rises and stops by rotating the opening 21b of the premixing device 21 to the position opened on the lower surface, and the filter block 23 from the open position. It is positioned at the sealing position, and is held and sealed in a state where the upper surface of the packing 25 is in contact with the peripheral surface of the lower surface of the cylinder 22.

  The pre-mixing device 21 is stopped at the position where the opening 21b is opened on the lower surface, the filter block 23 is positioned from the open position to the sealing position, and the hot water valve 4b is opened so that a predetermined amount of hot water is ground from the hot water nozzle 21e. The mixture of ground coffee beans and hot water, which has been pre-stirred and mixed, is flown into the cylinder 22 through the opening 21b. Furthermore, by washing the inner wall surface of the premixing device 21 with hot water sprayed from the hot water nozzle 21e and washing the ground coffee beans into the cylinder 22, the inner wall surface of the premixing device 21 can always be kept clean.

  Further, the steam generated from the raw material mixture supplied into the cylinder 22 is blocked by the premixing device 21 and does not rise up and enter the raw material passage of the mill 3b, so that the raw material passage of the mill 3b is blocked. It is possible to prevent the sale of beverages from becoming impossible.

  When the ground coffee beans and hot water mixture flows down into the cylinder 22 and accumulates on the filter 24 of the filter block 23, the gear pump 5 is energized to rotate the pump 5a in one direction and take in air from the conduit 5b. The taken-in air is sent out to the pipe line 5c, supplied from the coffee receiving portion 26 of the filter block 23 into the cylinder 22 through the filter 24, and the ground coffee beans and hot water raw material mixture put into the cylinder 22 Stir to extract coffee.

  When the ground coffee and hot water raw material mixture is agitated for a predetermined time with the air sent by energizing the gear pump 5 and the coffee is extracted, the pump 5a is rotated in the other direction and sucked from the pipe 5c. The coffee extracted inside is filtered by passing through the filter 24 of the filter block 23, the pipe 5 c is passed through the coffee receiving portion 26, and the coffee sucked by the gear pump 5 is carried out from the pipe 5 b to the outside. It is poured into beverage containers such as cups and provided to users of cup-type beverage vending machines 1. In this manner, when coffee is sucked from the ground coffee beans and hot water raw material mixture by the gear pump 5, the raw material extraction residue remains on the filter 24 after the coffee is extracted.

  When the extracted coffee is sucked and filtered by the gear pump 5 and provided to the user of the cup-type beverage vending machine 1, the rotor drive motor 98 is energized, as shown in FIG. 16 (d). The rotor 35 is driven to rotate by the rotor drive motor 98, and the disk portion 35a rotating in contact with the inner peripheral edge 37a of the cam 37 is lowered, whereby the slider body 36 is further lowered, and the filter block 23 is moved from the seal position. When the scraper body 27a moves on the filter block 23, the scraper 27 slides on the upper surface of the filter 24 and scrapes the extraction residue remaining on the filter 24. Discard.

  When the scraper 27 slides on the upper surface of the filter 24 and scrapes the extracted residue remaining on the filter 24, the scraper 27 is made of a thin metal plate and has a diameter of about 100 μm above the filtration hole 24a for filtering the beverage. Since the hot water film is formed on the dimples 24b having a depth of 5 to 10 [mu] m, the sliding resistance when the scraper 27 slides is reduced, and the driving force of the rotor driving motor 98 is small. Thus, the extracted soot can be reliably discharged from the filter 24 and discarded.

The state shown in FIG. 16A is the standby position, but the state after the extraction basket shown in FIG. 16D is discharged and discarded may be used as the standby position.
As described above, according to the present invention, the coffee brewing device 2 for extracting beverages using raw materials and hot water has a top surface and a bottom surface that are open, and a cylinder 22 for extracting beverages therein. The filter 24 is provided on the upper surface, and can be moved up and down between a sealing position for sealing the lower surface of the cylinder 22 below the cylinder 22 and an opening position lower than the sealing position and for opening the lower surface of the cylinder 22. A coffee brewing device comprising: a filter block 23 that is provided and is extracted in the cylinder 22 when positioned at the sealing position, and a filter block 23 that filters the beverage by a filter 24 when the beverage discharged from the cylinder 22 passes through. In the apparatus 2, a raw material mixture in which the raw material and hot water are received and pre-stirred and mixed is generated. The premixing device 21 is further provided with a premixing device 21 that is supplied from the upper surface opening 22a. The premixing device 21 is formed in a cylindrical shape with both end surfaces closed, and receives a raw material in the cylinder body 21a and discharges the raw material mixture to the cylinder 22. And a hot water nozzle 21e for injecting hot water to the supplied raw material is provided on one of the closed end faces, and when the raw material mixture is generated by the premixing device 21 and supplied to the cylinder 22 The raw material is received from the opening 21b by placing the opening 21b of the premixing device 21 on the upper surface, and then the hot water from the hot water nozzle 21e is placed on the received raw material by rotating the premixing device 21 to place the opening 21b on the lower surface. The raw material mixture that has been jetted and pre-stirred and mixed is supplied to the cylinder 22 through the opening 21b, whereby the cylinder 22 performs stirring and mixing. The raw material and hot water are forcibly pre-stirred and mixed in advance by the premixing device 21 to efficiently mix the raw material and hot water, and the fully mixed raw material mixture is put into the cylinder 22 in the same time as the hot water supply time. can do. As a result, the coffee extraction device 2 can improve the extraction efficiency, eliminate the variation in the degree of stirring and mixing depending on the raw materials and hot water temperature, realize a stable extraction, and can extract a beverage with a stable quality in a short time with a small size and low cost. Can be provided.

  Moreover, the inner wall surface of the premixing device 21 can always be kept clean by washing the raw material from the inner wall surface of the premixing device 21 to the cylinder 22 with hot water sprayed from the hot water nozzle 21e.

  Further, the premixing device 21 shields steam generated from the raw material mixture supplied into the cylinder 22 from the mill 3b to protect the mill 3b, so that steam generated from the raw material mixture in the cylinder 22 is milled. Since it does not go up to the raw material passage of 3b and invades, it is possible to prevent the raw material passage of the mill 3b from being blocked and to prevent the beverage from being sold. This eliminates the need to provide a dedicated steam exhaust device and forcibly exhaust steam to the outside via the exhaust duct, eliminating the need for an expensive and space-consuming steam exhaust device, reducing the size and selling durability. It is possible to provide the coffee extraction device 2 that can be realized and can extract a beverage having a stable quality in a short time at a low cost.

  Further, the premixing device 21 can rotate in conjunction with the drive unit 30 that moves the filter block 23 up and down, thereby providing a small and low-cost coffee extraction device 2.

  Further, the filter 24 has a dimple shape on the upper side of the filtration hole 24a for filtering the beverage, and a hot water film is formed on the dimple 24b, so that the slide when the extraction waste disposal scraper 27 slides after the beverage is extracted from the raw material mixture. By reducing the dynamic resistance, it is possible to reduce the size of the scraper sliding motor and reduce the cost of the scraper 27, and to provide a coffee brewing device 2 that is small and low cost.

1 Cup-type beverage vending machine 2 Coffee extractor (beverage extractor)
3 Raw material supply device 3a Raw material canister (raw material storage device)
3b mill (raw material crusher)
21 Premixing device 21a Tube body 21b Opening 21e Hot water nozzle (hot water nozzle)
22 Cylinder (extraction container)
23 Filter block (beverage filtration part)
24 Filter 24b Dimple 27 Scraper 30 Drive unit (filter lifting mechanism)
90 Control unit

Claims (5)

A beverage extraction device for extracting a beverage using raw materials and hot water,
An extraction container for opening the upper and lower surfaces and extracting the beverage inside;
A filter is provided on the upper surface, and can be moved up and down between a sealing position for sealing the lower surface of the extraction container below the extraction container and an open position lower than the sealing position and for opening the lower surface of the extraction container. When the beverage is extracted in the extraction container when it is located at the sealing position and the beverage carried out of the extraction container passes, a beverage filtration unit that filters the beverage with the filter,
In a beverage extraction device comprising:
It further includes a premixing device that receives the raw material and hot water and generates a raw material mixture that has been pre-stirred and mixed, and supplies the raw material mixture from the upper surface opening of the extraction container,
The premixing device is formed in a cylindrical shape whose both end faces are closed, and the cylinder body is provided with an opening for receiving the raw material and discharging the raw material mixture to the extraction container, and the closed one side A hot water nozzle for injecting the hot water into the supplied raw material is provided on the end face of
When the raw material mixture is generated by the premixing device and supplied to the extraction container, an opening of the premixing device is arranged on the upper surface to receive the raw material from the opening, and then the premixing device The raw material mixture in which the opening is arranged on the lower surface by rotating the jet and the hot water is jetted from the hot water nozzle into the received raw material and pre-stirred and mixed is supplied to the extraction container from the opening. Beverage extraction device.   The beverage extraction apparatus according to claim 1, wherein the raw material is washed away from the inner wall surface of the premixing device with the hot water sprayed from the hot water nozzle into the extraction container.   The pre-mixing device protects the raw material crushing device by blocking steam generated from the raw material mixture supplied into the extraction container from the raw material crushing device. Item 3. A beverage extraction apparatus according to Item 2.   The beverage extraction device according to any one of claims 1 to 3, wherein the premixing device rotates in conjunction with a filtration unit lifting mechanism that lifts and lowers the beverage filtration unit.   The filter has a dimple shape on the upper side of the filtration hole for filtering the beverage, and a hot water film is formed on the dimple, thereby reducing sliding resistance when sliding the extraction waste disposal scraper after extracting the beverage from the raw material mixture. The beverage extraction apparatus according to claim 1, wherein