JPH0148009B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an apparatus for mixing powdered raw materials and hot water to extract a solution.

(B) Prior Art As such an extraction device, a device that mixes ground coffee beans and powdered coffee with hot water, decocts the mixture, and pours out the extracted liquid is well known. In order to dissolve a certain amount of the powder raw material in a certain amount of hot water in this manner, stirring is required since a good effect cannot be obtained by simply mixing the hot water and the powder raw material in a static state. Stirring can be thought of as a relative movement between hot water and powdered raw material, but Japanese Patent Publication No. 43-25480 describes a device that confines coffee powdered raw material in a small chamber and pumps hot water from above through an air layer with a piston. Disclosed. In this method, the piston moves downward to move the hot water and the powder relative to each other for stirring, and also extracts the water through a filter using the falling pressure. However, according to this method, a high pressure is required because the powder raw material is confined in a small chamber, but if the pressure is too high, the resistance to the filter increases and there is a risk of damage. In addition, in Japanese Patent Publication No. 56-35234, a piston is placed at the bottom of a mixing chamber for hot water and powder raw materials through a filter, and when the piston moves up, air is introduced into the mixing chamber for stirring, and when the piston moves down, air is introduced into the mixing chamber. It is disclosed that a negative pressure is generated to extract a beverage. However, the above-mentioned Japanese Patent Publication No. 43-25480 is also similar, but in this case, the relative momentum between the hot water and the powdered raw material is determined by the amount of air pushed out from the piston, and the degree of agitation can be increased by feeding an arbitrary amount of air. It is impossible to change. Therefore, if the temperature of the hot water is low or the particle size of the powdered raw material is coarse, there is a drawback that sufficient stirring is not possible.

(c) Problems to be solved by the invention As described above, in the prior art, the degree of stirring is determined by the capacity of the piston, so it is not possible to change the degree of stirring according to the temperature of the hot water or the particle size of the raw material. Nakatsuta.

In view of the above points, the present invention provides an extraction device in which the amount of air fed for stirring can be varied.

(d) Means for Solving the Problems To explain the basic structure of the present invention, there is an extraction chamber 4 into which powdered raw materials and hot water are introduced, and a bottom surface of the extraction chamber that is permeable to gas and liquid. filter 9
, a beverage receiver 7 disposed below the extraction chamber via a filter, and a beverage tube 10 provided in the beverage receiver that is closed during stirring and open during extraction to pour out the extract from the extraction chamber; It consists of a stirring pump and a pump that introduces pressurized air into the extraction chamber.

(E) Effect During stirring, the pressurized air from the pump flows upward through the extraction chamber because the beverage tube is in a closed state, so that the powdered raw material and hot water are stirred in the extraction chamber.

(F) Embodiment FIG. 1 is a block diagram of an apparatus according to the present invention.
2 is a raw material supply device that supplies a predetermined amount of coffee powder raw material for each sales operation; 2 is a raw material shoot; 3 is a hot water nozzle that pours hot water from a hot water tank (not shown);
Reference numeral 4 denotes an extraction chamber which is vertically movable and has an introduction section 5 for hot water and powder raw materials formed above.
Reference numeral 6 denotes means for urging the mixed liquid in the extraction chamber 4 toward the paper filter 9 during extraction, and in this example a piston is used to move up and down the extraction chamber 4, but a pressurizing means such as a pump may also be used. Reference numeral 7 denotes a beverage tray, and an annular gasket 8 is embedded in the peripheral wall facing the brewing chamber 4, and when the brewing chamber 4 is lowered, its lower end pinches the paper filter 9 and comes into close contact with the gasket 8. ing. The beverage receiver 7 has a pouring hole 11 connected to a beverage tube 10 at its bottom, and an air hole 13 connected to an air tube 12 at its side. And beverage tube 1
0 and the air tube 12 are each made of silicone rubber, and opening and closing are controlled by the pressure of operating members 14 and 15. Each of the operating members 14, 15 has one end rotatably supported on shafts 16, 17, and the other end bent to form operating portions 14A, 15A. The actuating members 14, 15 are rotated by the tubes 10, 1.
Crush 2 to close it. 20 is an air pump that introduces pressurized air into the extraction chamber 4 from below the filter 9 through the air tube 10; 21 and 22 are raw material delivery devices that supply a predetermined amount of sugar and milk for each sales operation; 23 is a mixing bowl; 24 is a sales cup.

To explain the operation of the above configuration, the standby state cams 18 and 19 in FIG.
air tube 10 and beverage tube 12 are both in the open state. And extraction chamber 4
The paper filter 9 is held in close contact with the beverage tray 7. In the air agitation state shown in FIG. 3, the actuating member 15 is not rotating and the air tube 10 remains open, but the actuating member 14 is urged by the cam 18 and rotates to open the beverage tube. 10 is crushed and in a closed state. In this state, the required amount of hot water and coffee powder is supplied to the extraction chamber 4, and at the same time the air pump 20 is operated. At this time, since the beverage tube 10 is in the closed state, the air tube 12
The pressurized air is introduced into the extraction chamber 4 from below the paper filter 9 and blows through the introduction part 5. Therefore, in the extraction chamber 4, the hot water and the powdered raw material are stirred by relative movement due to the passage of air, but by setting the operation time of the air pump 20 arbitrarily, the amount of air delivered can be varied and an effective Agitation (air agitation) is achieved.

When the set time for stirring has elapsed, the air pump 20 is stopped and the extraction state shown in FIG. 4 is entered. In this state, the actuating member 15 is biased and rotated by the rotation of the cam 19, and the air tube 12 is crushed by the actuating portion 15A to be in the closed state. The cam 18 also rotates further from the air agitation state to release the biasing of the actuating member 14, thereby switching the beverage tube 10 to the open state. Then, the piston 6 moves down the extraction chamber 4 and pushes out the mixed liquid of coffee powder and hot water to the filter 25, and the mixed liquid is filtered by the filter 9 and extracted into the beverage receiver 7. Therefore, the extract is introduced into the mixing bowl 23 through the beverage tube 12 and the raw material delivery device 2
Sugar and milk from 1 and 22 are mixed and poured into a cup 24.

When the coffee liquid is thus extracted from the brewing chamber 4 and sent out from the beverage tube 12, the filter is set in the state shown in FIG. In this state, extraction chamber 4
The paper filter 9 is pulled upwards and separated from the beverage tray 7, and the paper filter 9 is fed a certain length using a paper filter feeding device (not shown) to remove the portion on which the waste is placed from the extraction chamber 4. Then, the cam 18 is rotated to release the bias on the actuating member 15 and open the air tube 12. Furthermore, return the piston 6 to top dead center,
Then, the extraction chamber 4 is lowered and the paper filter 9 is placed in close contact with the beverage receiver 7 to be in a standby state.

(G) Effects of the Invention According to the present invention, the relative movement between the powdered raw material and the hot water can be adjusted by changing the time for introducing pressurized air into the extraction chamber from below the filter. Therefore, it can be arbitrarily set to obtain the optimum stirring effect depending on the temperature of the hot water or the particle size of the powder raw material. Furthermore, there is no need to apply high pressure to the extraction chamber to set the air delivery time, and the filter will not be damaged.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an extraction device according to the present invention;
3 shows a standby state, FIG. 3 shows a stirring state, FIG. 4 shows an extraction state, and FIG. 5 shows a filter set state. DESCRIPTION OF SYMBOLS 1... Raw material supply device, 4... Extraction chamber, 6... Piston, 7... Beverage receiver, 9... Filter, 10... Beverage tube, 12... Air tube, 20... Pump.

Claims (1)

[Claims] 1 A raw material supply device that supplies a predetermined amount of powder raw material, a hot water supply mechanism that supplies a predetermined amount of hot water, an extraction chamber into which the powder raw material and hot water are introduced from an upper opening, and a gas and liquid permeable a filter that forms the bottom surface of the extraction chamber; a beverage tray that is in close contact with the extraction chamber through the filter during stirring and extraction; and a beverage tray that is provided in the beverage tray and is closed during stirring and is closed during extraction. An extraction device comprising a beverage tube that is in an open state, a pump that introduces pressurized air into the extraction chamber during stirring, and means that urges the mixed liquid in the extraction chamber toward the filter during extraction.