JPH0710678Y2 - Beverage extractor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a beverage extractor for pouring a powdered raw material such as coffee into a beverage liquid.

(Prior Art) Conventionally, a beverage extractor such as coffee of this type is disclosed in
As shown in Japanese Patent No. 57-31894, a cylinder is provided with a raw material charging port, coffee powder and hot water are charged from the raw material charging port, coffee is brewed in the cylinder, and then a piston installed in the cylinder is installed. By lowering the coffee, the coffee is filtered through a filter and supplied to the cup.

However, in such a beverage brewing machine, since coffee is brewed in the cylinder, coffee grounds adhere to the inner wall of the cylinder after coffee brewing, which causes the piston to move smoothly up and down in the cylinder. No, there was a drawback that the so-called piston lock phenomenon occurs.

Then, in order to eliminate such a defect, the actual public Sho 63-311
As shown in FIG. 1 of Japanese Patent Publication No. 79, the powdered coffee raw material is directly charged into a compounding cup provided directly below a cylinder whose both ends are open and movable in the horizontal direction without passing through the cylinder. There was one in which the pouring piston was operated to descend, the coffee was filtered through a filter, and the coffee was supplied to the cup through a water pipe.

(Problems to be solved by the invention) However, in such a beverage brewing machine, when the piston is lowered to obtain the coffee liquid, the lower end of the cylinder is largely opened, so Is slowed down by the piston being pressurized by the piston, so that the coffee raw material in the brewing cup partially flows back into the cylinder against the flow speed, and after coffee extraction, coffee grounds adhere to the inner wall of the cylinder. Similarly, a piston lock phenomenon occurs in which the piston does not move smoothly up and down in the cylinder.

The present invention aims to provide a beverage extractor without a piston lock.

[Structure of the Invention] (Means for Solving the Problem) The present invention has a cylinder and a mixing chamber provided at the lower part of the cylinder so as to be able to come into contact with and separate from the cylinder, and the cylinder and the mixing chamber are separated from each other. While supplying the powdered raw material such as coffee directly from the canister to the blending chamber without passing through the cylinder, the hot water in the hot water tank is fed into the cylinder when the cylinder and the blending chamber are joined, and the hot water is pressurized by the piston. In a beverage extractor in which hot water is poured into the powder raw material to obtain a beverage liquid through a filter, the cylinder is formed into a bottomed tubular shape, and a bottom of the cylinder communicates with a small diameter hot water passage opened and closed by a check valve to the outside air. It is provided with a vacuum break valve.

(Operation) In the present invention, the mixing chamber and the cylinder are separated, and a space is formed between the mixing chamber and the cylinder. Next, a powdered raw material such as coffee is directly supplied from the raw material canister to the blending chamber, and then the cylinder and the blending chamber are connected. Next, the hot water in the hot water supply tank is supplied into the cylinder, the piston is moved below the cylinder, and the hot water is pressurized. Then, the pressurized hot water presses a check valve provided at the bottom of the cylinder to open a small-diameter hot water passage, and the flow velocity is accelerated from the hot water passage to pour the hot water into the powder raw material, and the beverage. The beverage liquid is extracted through the filter without backflow of the raw material into the cylinder. When the piston rises, the check valve closes the hot water passage to prevent the beverage liquid that partially remains in the mixing chamber from flowing back into the cylinder, and the vacuum break valve operates to allow the piston to move smoothly. Returned to position.

(Embodiment) The configuration of an embodiment of the present invention will be described below with reference to FIG.

Reference numeral 1 is a cylinder having a bottomed cylindrical shape. A small diameter hot water passage 3 is provided at the bottom portion 2 of the cylinder 1, and a check valve is provided below the hot water passage 3 by a spring 4 so as to constantly close the hot water passage 3. A vacuum breaking valve 7 communicating with the outside air via a communication hole 6 is provided on the side of the valve 5 and the bottom portion 2. A piston 8 is provided in the cylinder 1 so as to be vertically movable. A net-like pressing plate 9 is attached to the bottom portion 2 of the cylinder 1 via a spring 10. A mixing chamber 11 is provided below the cylinder 1 via a packing 12 so as to be contactable with and separable from the cylinder 1. Reference numeral 13 is an extraction pipe, and the extraction pipe 13 has a filter 14 in an upper opening portion, is provided at a lower portion of the blending chamber 11 so as to be freely contactable and separable, and extracts a beverage liquid into a cup 15. Reference numeral 16 denotes a hot water supply tank. A heating element 17 is provided on the outer periphery of the lower part of the hot water supply tank 16 and a water supply tray 18 is provided on the upper part.
A hot water supply pipe 20 having a pump 19 is provided in the lower part, and the hot water supply pipe 20 is connected to a hot water supply port 21 provided in the upper part of the cylinder 1 so as to supply hot water into the cylinder 1. . Reference numeral 22 denotes a raw material canister. Inside the raw material canister 22, for example, coffee powder which is a raw material of coffee is stored, and the coffee powder is discharged from the discharge coil 23.
Through the action of the shoot 24 through the chute 24, the mixing chamber 11
To be supplied to. Reference numeral 25 denotes a scraper, and a scraping piece 26 made of an elastic material is attached to the tip end of the scraper 25, and the scraper 25 is provided so as to be movable in the horizontal direction to scrape off the coffee grounds in the brewing chamber 11 and store them in the grounding tray 27 It is designed to let you. An overflow pipe 28 is connected directly below the hot water supply port 21 of the cylinder 1 so that the hot water overflowing into the cylinder 1 is discharged to the residue receiver 27.

Next, the beverage extraction operation according to the above configuration will be described with reference to FIGS.

First, during standby, the piston 8 is located above the cylinder 1 in the state shown in FIG. In this state, the cylinder 1 moves above the mixing chamber 11 as shown in FIG. A, and a space is formed between the cylinder 1 and the mixing chamber 11.
Next, in this state, a certain amount of coffee powder is supplied from the raw material canister 22 to the brewing chamber 11 by the operation of the discharge coil 23.
Then, the cylinder 1 is moved downward and coupled to the brewing chamber 11 as shown in FIG. B, and the coffee powder is compressed by the mesh-shaped pressing plate 9. Then, in this state, the hot water in the hot water supply tank 16 is pumped up by the pump 19 and supplied into the cylinder 1 through the hot water supply pipe 20. Then, in this state, the piston 8 is moved below the cylinder 1. The hot water pressurized by the piston 8 presses the check valve 5 against the spring 4, opens the hot water passage 3 and is poured into the compressed coffee powder so that the hot water permeates each part of the coffee powder. After permeating and making good contact, the coffee liquid is effectively extracted into the cup 15 through the filter 14 and the extraction tube 13. The hot water passing through the hot water passage 3 at the time of this extraction has a small flow diameter because of the small diameter of the hot water passage 3 and overcomes the backflow of the coffee raw material, and the backflow of the coffee raw material into the cylinder 1 is prevented. Therefore,
Since coffee grounds do not adhere to the inner wall of the cylinder 1, the piston locking phenomenon is prevented. Then, when the extraction of the coffee liquid is completed, the piston 8 is returned to the original standby state. When the piston 8 returns, the check valve closes the hot water passage to prevent the coffee liquid partially remaining in the brewing chamber from flowing back into the cylinder, and at the same time, the vacuum break valve operates to open the outside air through the communication hole 6. Is introduced into the cylinder 1, and the piston is smoothly returned to its original position. From this state, the cylinder 1 moves upward in a state where the mixing chamber 11 is connected, as shown in FIG. C, and is separated from the extraction pipe 13 to form a space between the mixing chamber 11 and the extraction pipe 13. Then, in this state, the scraper 25 is horizontally moved to the right in the figure and scraped off.
The coffee grounds are scraped off by 26 and stored in a grounding tray 27.

It should be noted that the beverage raw material of the present invention has been described by taking the coffee powder raw material as an example, but the present invention is not limited to this and other powder raw materials may be used. Further, the method of moving the cylinder and the blending chamber into and out of each other has been described by moving the cylinder in the vertical direction, but it may be carried out by moving the cylinder in the horizontal direction.

[Advantage of the Invention] According to the present invention, a small diameter hot water passage opened and closed by a check valve is provided at the bottom of the cylinder, and the beverage liquid is extracted through this hot water passage. The backflow of liquid is prevented, and the piston lock phenomenon due to coffee grounds is prevented.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the beverage extractor of the present invention, and FIGS. 2a, 2b, and 2c are explanatory views of the operation sequence of the embodiment shown in FIG. 1, respectively. 1 ... Cylinder, 2 ... Bottom part, 3 ... Small diameter hot water passage,
5 ... Check valve, 7 ... Vacuum break valve, 8 ... Piston, 11
…… Mixing room, 14 …… Filter, 16 …… Hot water tank, 22
…… Raw material canister

Claims (1)

[Scope of utility model registration request] 1. A cylinder and a brewing chamber provided at a lower portion of the cylinder so as to be capable of coming into contact with and separated from each other, and the cylinder and the brewing chamber are separated from each other, and coffee or the like is fed into the brewing chamber without passing through the cylinder from a raw material canister. In addition to directly supplying the powder raw material, the cylinder and the preparation chamber are joined to each other to supply the hot water in the hot water tank into the cylinder, pressurizing the hot water with the piston to pour the hot water into the powder raw material, and drink the beverage through the filter. In the beverage extractor for obtaining the beverage, the cylinder is formed in a bottomed cylindrical shape, the bottom is provided with a small-diameter hot water passage opened and closed by a check valve and a vacuum break valve communicating with the outside air. Extractor.