KR101448230B1 - Apparatus for extracting coffee using cool water - Google Patents

Abstract

Disclosed is a device for brewing coffee using cool water. The coffee brewing device of the present invention comprises: a frame which is formed to be elongated in a horizontal direction or a vertical direction and has an installation space formed between both ends thereof; a pressurizing unit which is installed to be biased to one side in the installation space and is equipped with a pressurizing cylinder for forwardly and backwardly moving a pressurizing piston and with a cool water accommodating cylinder having one side coupled with the piston and having a cool water outlet formed on the other side, so that the cool water in the cool water accommodating cylinder is pressurized and discharged at a particular pressure through the piston; a coffee brewing tank which accommodates coffee therein, has a coupling unit coupled with one end of the cool water outlet, includes an extracted liquid outlet formed on the other end thereof, and has a filter prepared in the coupling unit and extracted liquid outlet so as to prevent the outflow of coffee particles, wherein the extracted liquid outlet discharges a coffee extracted liquid which is extracted by passing the cool water through the coffee therein with a particular degree of pressure by means of the pressurizing unit; and a valve device which is coupled with the extracted liquid outlet. Cool water is pressurized by the pressurizing unit to pass through the coffee brewing tank at a particular degree of pressure, and thereby coffee is extracted. By means of the present invention, room temperature water or cool water is not heated but is pressurized to a particular degree of pressure so as to pass through the coffee accommodating tank, thus the cool water passes through the fine pores of coffee particles and components can be rapidly extracted. Accordingly, coffee can be extracted without changes in oil and essence levels. Consequently, coffee having excellent flavors and containing a small quantity of caffeine can be obtained, and the coffee can be effectively stored for a long time when it is sealed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a coffee extracting apparatus using cold water,

The present invention relates to a coffee extracting apparatus using cold water, and more particularly, to a coffee extracting apparatus using chilled water capable of extracting coffee using room temperature water or cold water and extracting coffee with an extraction pressure corresponding to a power distribution stage of coffee To a coffee extracting apparatus.

Generally, bean coffee is a preference drink made from coffee bean, which is a seed of coffee tree fruit. There are about 40 kinds of coffee, but cultivated is arabica, Robusta (Congo species), Ribery radish, Species, and the shape and characteristics of each plant are very different and there are many differences in quality.

The beverage using the coffee beans has been popularized by the 15th century Muslim ruler Dabani since drinking Persian style coffee, and it has been increasingly demanding industrial products related to coffee, Related industries and related industries are increasing rapidly.

The production of coffee beverages using the coffee beans is largely divided into instant coffee and coffee beans. Also, the coffee beans include drip type and espresso type depending on the extraction method from the coffee bean.

Particularly, espresso refers to a method of extracting coffee in a short time by adding high-pressure hot water to finely pulverized coffee beans and coffee extracted through such a method.

The apparatus for extracting espresso coffee includes a filter unit (pota filter-porta filter) for containing coffee ground beverages, and a boiler for supplying hot water. The hot water is supplied to the coffee beans .

Various types of espresso coffee extracting apparatuses are known, such as a coffee shop, an industrial company, a meeting room, and a home.

On the other hand, factors that determine the flavor of espresso coffee include the type of coffee bean, degree of roasting of coffee bean, and particle size. In addition to the above factors, the temperature and pressure of the hot water when extracting espresso coffee from the coffee extracting device have a large influence on the city. For example, a conventional coffee extracting apparatus extracts espresso coffee by applying hot water having a temperature of about 90 DEG C and a pressure of 8 to 10 kg / cm < 2 >. However, the conventional espresso coffee extracted using hot water has a problem in that the flavor of the espresso coffee extracted due to oxidation or deterioration of the components contained in the coffee itself or volatilization of the volatile components is lowered.

As a method for solving the above problems, a drip type extraction method for extracting coffee using cold water has been proposed. The drip-type extraction method is a structure in which cold water is placed on the upper part, a filter in which coffee powder is contained in the lower part, and a storage container in which the extracted coffee is contained in the lowest part. It is. Such a drip type extraction method is able to maintain the flavor of the coffee itself with little caffeine by allowing it to be extracted naturally for a long time without forcibly extracting it by applying heat or pressure as compared with the espresso extraction method described above.

However, since such a drip extraction method takes a very long time for extracting coffee, it has been practically impossible to use it at home as well as commercially.

As a means for solving such a problem, Korean Patent Registration No. 10-0920237 (Publication date: 2009.10.05) is disclosed. 1 and 3, the coffee extracting apparatus of this prior art includes a main body 10, a cold water supply source 11 provided inside the main body 10 to provide cold water, a cold water supply source 11, A filter unit 20 which is detachably provided in the filter unit 20 and accommodates the ground coffee beans and extracts coffee from the coffee beans; And a pressure holding unit (200) for holding the coffee beans. The pressure holding unit 200 includes a housing 210 detachably coupled to the outlet of the filter unit 20, a takeout member 220 communicating with the housing 210 to discharge the coffee, A plurality of grooves 233 are formed on the surface so that the minimum flow rate of coffee can pass when the outlet 23 is in close contact with the outlet 23, An elastic supporting member 240 accommodated in the housing 210 and elastically urging the opening and closing member 230 in a direction in which the opening and closing member 230 is in close contact with the outlet 23, .

However, such conventional coffee extracting apparatuses are capable of extracting espresso coffee which is excellent in flavor and rich in crema by using cold water, and can also be used as a coffee beverage having low caffeine content, such as decaffeinated coffee However, there is a problem that it is impossible to extract large quantities because only one or two portions can be extracted. That is, the coffee extracting apparatus according to the prior art has a problem in that the coffee contained in the filter is extracted by exposing it to high pressure, and then the coffee powder of one to two cups is again put in the filter, and then the above operation is repeatedly performed .

Korean Patent No. 10-0920237 (Notification Date: October 5, 2009)

It is an object of the present invention to provide a means capable of not only extracting coffee having excellent flavor and low caffeine content in a short time using room temperature water or cold water, but also capable of mass extraction.

It is another object of the present invention to provide a means for extracting coffee with an extraction pressure corresponding to the distribution phase of the coffee.

The above object is achieved according to the present invention by a frame which is elongated in the horizontal direction or the vertical direction and forms an installation space between both ends; And a cold water receiving cylinder provided on one side of the installation space and having a pressurizing cylinder for operating the pressurizing piston forward and backward and one end connected to the piston and the other end provided with a cold water outlet, A pressurizing portion for pressurizing and discharging the cold water inside the cylinder at a predetermined pressure; And an extracting part for discharging the extracted coffee extract while passing the coffee inside through the pressurizing part at a predetermined pressure is provided at the other end of the coffee maker, A coffee extracting tank having an outlet formed therein and having a filtering filter for preventing the escape of coffee particles from the outlet of the outlet; And a valve device coupled to be connected to the extracting outlet for temporarily storing and selectively discharging the coffee extract liquid discharged from the coffee extracting tank, wherein the cold water in the cold water receiving cylinder is pressurized to a predetermined pressure And the coffee is extracted while cold water passes through the coffee extraction tank at a predetermined pressure.

The pressurizing portion, the coffee extraction tank and the valve device may be arranged in a straight line.

The pressurizing cylinder may further include a driving unit for causing the piston to expand and contract by an electric motor, or to extend and contract the piston by hydraulic pressure or pneumatic pressure.

A pressure gauge installed in a region of the cold water discharge port to measure a pressure inside the cold water receiving cylinder; A pressure regulating switch for controlling the pressure applied to the cold water receiving cylinder by selectively controlling the operation of the pressurizing cylinder and a control box provided on the frame, ; And a microcomputer electrically connected to the pressure gauge and the driving unit and configured to control the driving unit based on a pressure value measured by the pressure gauge.

A water supply portion for supplying clean water to the cold water receiving cylinder is provided in the region of the cold water discharge port when the piston completes the compression of the cold water and is operated to shrink, A supplementary pipe having a one-way valve or an electromagnetic valve at an intermediate portion thereof; And a cold water replenishing tank coupled to the other end of the replenishing pipe, having a water filter, and connected to a water pipe or a cold water storage passage.

The cold water replenishing tank may be installed at a position equal to or higher than the height of the cold water receiving cylinder.

A cold water opening / closing valve for selectively opening / closing the cold water discharged to the cold water outlet may be installed between the cold water outlet and the coupling portion.

A hollow connecting member is provided between the outlet side of the cold water on-off valve and the engaging portion and between the valve device and the outlet for the extraction of the coffee extracting tank, .

The coupling portion and the extraction liquid outlet may be respectively coupled to the respective coupling members in a screw fastening structure.

The connecting portion and the extracting liquid outlet are connected to the pressing force of the pressing means for selectively pressurizing the coffee extraction tank in the direction of the cold water receiving chamber after the end portion of the coupling portion and the end portion of the extract liquid outlet are inserted into the respective connecting members To the seating surfaces formed on the inner circumferential surfaces of the connecting members.

A connection member support plate for supporting the connection member coupled to the extraction liquid outlet is provided between the connection member and the valve device coupled to the extraction liquid outlet, Lt; / RTI >

Wherein the valve device comprises: a primary valve connected to the connection member to open and close the extracted coffee extract; A final filtration portion selectively coupled to one end of the primary valve by a coupling; And a secondary valve coupled to an end of the final filtration section for discharging the finally filtered coffee extract to the vessel by the final filtration section.

Wherein the final filtration section comprises: an open final filtration filter coupled to an outlet region of the primary valve; And a second valve coupled to the other end of the first valve, wherein the second valve is connected to the end of the first valve and the coffee extract is stored to temporarily store the coffee extract, And a housing having a penetrating portion for the housing.

Wherein the pressing means includes a case in which the valve device is accommodated and one end is coupled to the connecting member supporting plate; And a pressurizing cylinder connected to the other end of the case for selectively pressing the case toward the cold water receiving cylinder.

According to the present invention, by passing the cold water through the coffee receiving tank by pressurizing the room-temperature water or the cold water at a predetermined pressure without applying heat, the components can be quickly extracted while the cold water passes through the micro-pores of the coffee particles, It is possible to extract the oil and the essence without deforming. Thus, coffee having excellent flavor and low caffeine content can be obtained, and long-term storage is possible when the coffee is sealed.

According to the present invention, it is possible not only to extract in a short time, but also to provide an effect of mass extraction.

According to the present invention, since the pressing force of the cold water can be adjusted according to the degree of roasting of the coffee, that is, the degree of roasting of the coffee, the effect of extracting the coffee with the extraction pressure matching the characteristics of the coffee can be provided.

1 is a schematic diagram showing a conventional coffee extracting apparatus.
Fig. 2 is an enlarged sectional view showing the pressure holding unit of the coffee extracting apparatus shown in Fig. 1. Fig.
3 is a schematic sectional view showing a coffee extracting apparatus according to the present invention.
Fig. 4 is a schematic sectional view showing a state in which the pressurizing means of the coffee extracting apparatus shown in Fig. 3 is operated. Fig.
Fig. 5 is a schematic block diagram showing a control unit for controlling the coffee extraction apparatus shown in Fig. 3; Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

Fig. 3 is a schematic cross-sectional view showing a coffee extracting apparatus according to the present invention, Fig. 4 is a schematic cross-sectional view showing a state in which the pressing means of the coffee extracting apparatus shown in Fig. 3 is operated, Fig. 3 is a schematic block diagram showing a control unit for controlling the coffee extracting apparatus shown in Fig. 3; Fig.

3 and 5, the coffee extracting apparatus using cold water according to the present invention includes a frame 30 formed to be long in a horizontal direction or a vertical direction and having an installation space 32 between both ends thereof, A coffee extracting tank 50 for extracting components from the coffee while the cold water pressurized by the pressurizing unit 40 passes therethrough and a pressurizing unit 40 for pressurizing the cold water to a predetermined pressure, And a valve device 60 for filtering, storing, and discharging the coffee extract liquid extracted from the tank 50.

This will be described more specifically.

The frame 30 is provided so that the pressurizing portion 40, the coffee extraction tank 50 and the valve device 60 are disposed in a straight line. The frame 30 is provided between the upper and lower support plates 34A, A plurality of pillars 36 are coupled to form a plurality of pillars 32. Such a frame 30 may be arranged in a horizontal state, but in the present embodiment, the frame 30 will be described with reference to a vertical line, that is, a straight line in the gravity direction. This arrangement is intended to allow the pressing force generated in the pressing portion 40 to act in the direction of gravity and allow the coffee extract to be discharged naturally without any additional pumping means.

3, the pressing portion 40 is provided at the center of the intermediate support plate 34C provided on one side of the installation space 32, that is, on the upper side of the installation space 32, facing the upper support plate 34A A pressurizing cylinder 42 provided with a pressurizing piston 44 and an upper end connected to a bottom surface of the intermediate support plate 34C by a flange and a pressurizing piston 44 inserted upwardly And a cold water receiving cylinder 46. The pressurizing cylinder 42 comprises an electric motor, a hydraulic or pneumatically actuated driving part 48 for moving the pressurizing piston 44 inserted and joined to the cold water receiving cylinder 46 forward and backward. The cold water receiving cylinder 46 has a hollow pipe structure in which a pressurizing piston 44 is inserted and reciprocated inside. The pressurizing piston 44 is inserted into an upper end of the cylinder 46, and a cold water discharge port 46A .

The pressurizing portion 40 having such a structure has a structure in which when the cold water contained in the cold water receiving cylinder 46 is pressurized by the pressurizing piston 44, the cold water is discharged through the cold water discharge port 46A at a predetermined pressure.

The pressurizing unit 40 further includes a control unit 49 for controlling or controlling the internal pressure of the cold water receiving cylinder 46 and controlling the electric components to control the electric components.

The control unit 49 includes a pressure gauge 49A provided in the area of the cold water outlet 46A for measuring the pressure inside the cold water receiving cylinder 46 and a pressure cylinder 49 A pressure regulating switch 49C for selectively controlling the pressure applied to the cold water receiving cylinder 46 and an on and off switch 49B for turning on or off the power of the entire apparatus A control box 49D provided in the frame 30, a pressure gauge 49A and a drive unit 48 and a drive unit 48 electrically connected to the electric components and based on the pressure value measured by the pressure gauge 49A, And a microcomputer 49E configured to control the microcomputer 49E. At this time, the control box 49D may further include a releasing and mounting switch 49F for controlling the operation of the pressing and releasing cylinder 94.

The pressure control switch 49C is for use when the user adjusts the pressure of cold water suitable for roasting according to the roasting condition of coffee. The pressure regulating switch 49C may be constituted by a number of buttons corresponding to each power distribution step (degree of roasting or roasting step) or may be constituted by a step corresponding to each power distribution step (degree of roasting or roasting step) . In other words, coffee has different stages of distribution depending on the characteristics of the product or species. For example, the distribution stage is to roast the coffee by dividing it into medicine distribution, medicine distribution, medicine distribution, medicinal distribution, middle distribution, middle distribution, strength distribution, and steel distribution. In this case, a plurality of pressure control switches 49C corresponding to each power distribution stage are provided so that the pressure of the cold water can be applied to the pressure corresponding to the step, A pressure regulating switch 49C suitable for the coffee is selected to apply the extraction pressure suitable for the coffee. At this time, the lower the distribution stage (the lower the degree of roasting), the higher the extraction pressure, and the higher the distribution stage, the lower the extraction pressure. This is because coffee components can be extracted sufficiently even at low extraction pressures of 20 - 30 kgf / m 2 in cases such as full-scale roast, French roast, Italian roast and the like.

If the pressure regulating switch 49C is of the dial type (electronic type), the extraction pressure may be different according to the rotation angle of the dial, and the extraction pressure corresponding to each power distribution stage may be generated.

When the pressure gauge 49A senses that the pressure inside the cold water receiving cylinder 46 rises above a predetermined pressure, the microcomputer 49E stops the operation of advancing the pressure piston 44 by the driving part 48 I will.

On the other hand, in the region of the cold water outlet 46A, a water supply portion (not shown) is provided for supplying the purified cold water to the cold water receiving cylinder 46 when the pressurizing piston 44 is pressurized and then shrunk 47 are installed. That is, when the pressurizing piston 44 rises with the cold water stored in the cold water receiving cylinder 46 exhausted, cold water is supplied from the outside to the cold water receiving cylinder 46 again. The water supply part 47 is connected to the cold water discharge port 46A at one end and is connected at its middle part with a one-way valve or solenoid valve 47A and a supplementary pipe 47B at the other end of the supplementary pipe 47B. And a cold water replenishing tank 48C connected to the water pipe or the cold water storage passage.

At this time, the cold water replenishing tank 48C is located at a position equal to or higher than the height of the cold water receiving cylinder 46 so that the cold water is naturally introduced into the cold water receiving cylinder 46 by the water level difference when the valve 47A is opened . Of course, when the pressure piston 44 is moved backward, the suction force acts in the supplement pipe 47B to open the valve 47A, and the cold water in the cold water replenishing tank 48C is discharged to the cold water receiving cylinder 46, But the suction force is weak or resistance is not generated when the pressure piston 44 is moved back so that the supply of the cold water is smoothly performed. The water replenishing unit 47 having such a structure allows the replenishing operation of the cold water to be performed without a separate pumping means.

The pressure applied to the cold water receiving cylinder 46 by the operation of the above-described pressure cylinder 42 is approximately 20-60 kgf / m 2. This pressure is intended to allow the cold water to smoothly pass through the pores of the coffee particles contained in the coffee extraction tank 50. When the pressure is 20 kgf / m 2 or less, the cold water can not smoothly pass through the pores of the fine coffee particles, In the case of 60 kgf / m 2 or more, coffee particles pass through the filtration filter 52 to leave scraps in the final extract, and all the devices must be made to withstand high pressures, resulting in an increase in production cost.

The coffee extraction tank 50 is filled with finely pulverized coffee and has a hollow pipe shape as shown in Fig. The coffee extracting tank 50 accommodates coffee therein and has a cold water outlet 46A at its one end, that is, at its upper end, a coupling portion 54A coupled to the coffee extracting tank 50. At the other end, An extracting outlet 54B for discharging the coffee extract liquid that has passed through the coffee in the coffee extracting tank 50 at a predetermined pressure is formed. In other words, the coffee extraction tank 50 is formed in the shape of a long pipe, and has an engaging portion 54A formed at an upper end thereof and an extracting outlet 54B formed at a lower end thereof.

At this time, a cold water opening / closing valve 70 for selectively opening and closing cold water discharged to the cold water discharge port 46A is installed between the cold water discharge port 46A and the engaging part 54A. This cold water on-off valve 70 has a function of closing the cold water outlet 46A so as not to supply cold water when the coffee extracting tank 50 is separated from the coffee extracting apparatus.

A discharge valve is provided at one side of the engaging portion 54A for discharging cold water to the cold water supply valve 70 when the cold water is excessively supplied. The discharge valve is a safety valve for automatically releasing the internal pressure when it rises above a predetermined pressure. Of course, it may be constituted by a manual valve.

An engaging portion 54A of the coffee extraction tank 50 and an extracting outlet 54B are provided between the outlet (lower end) of the cold water opening and closing valve 70 and the engaging portion 54A and between the valve device 60 and the extracting outlet 54B. And hollow coupling members 80A and 80B for respectively coupling the discharge ports 54B while keeping airtight.

These connecting members 80A and 80B are for easily detaching and mounting the coffee extracting tank 50 from the coffee extracting apparatus and are not shown in the drawings, but the connecting members 80A and 80B and the engaging portions 54A and < RTI ID = The extract outlet port 54B can be coupled with a screw fastening structure. That is, male threads are formed on the outer circumferential surfaces of the engaging portion 54A and the extracting outlet 54B, and female threads are formed on the inner circumferential surfaces of the connecting members 80A and 80B so that they can be coupled to each other with a fastening structure. At this time, the directions of the respective threads may be the same or different from each other so that the tightening and loosening may be performed at once.

However, in the present embodiment, as shown in FIG.

That is, the engaging portion 54A and the ejected liquid outlet 54B are pressed against the pressing means 90 in a state in which the respective end portions thereof are inserted into the connecting members 80A and 80B, So that airtightness is maintained. That is to say, in a state in which the respective ends of the engaging portion 54A and the ejected liquid outlet 54B are inserted into the connecting members 80A and 80B and are seated on the seating jaw 82, The respective ends of the coupling portion 54A and the extraction liquid outlet 54B are pressed into the seating jaw 82 inside the respective connecting members 80A and 80B so as to be airtight To be combined. At this time, the inlet of the upper linking member 54A is formed to be extended so that the engaging portion 54A can be easily inserted.

This will be described more specifically.

The lower connecting member 80B coupled to the end of the extract outlet 54B is coupled to the upper region of the connecting member supporting plate 84 disposed to face the lower supporting plate 34B as shown in Fig. The upper connecting member 80A is coupled to the bottom area of the cold water on-off valve 70. [ The upper end of the primary valve 62 of the valve device 60 is coupled to the lower connecting member 80B through the connecting member support plate 84 in the upward direction from the bottom to the connecting member supporting plate 84, And is coupled to the bottom surface of the connecting member support plate 84 by the structure.

The pressurizing means 90 has a case 92 in which a valve device 60 including the primary valve 62 is housed and one end portion (upper end portion) of the pressurizing means 90 is coupled to the bottom surface of the connecting member support plate 84 in a flange- And a pressing and pressing cylinder 94 which is coupled to the other end of the case 92 and selectively presses the case 92 in the direction of the cold water receiving cylinder 46. As described above, the pressing means 90 having such a structure presses the connecting member support plate 84 upward so that the respective ends of the engaging portion 54A and the extracting outlet 54B are connected to the inside of the connecting members 80A and 80B And the coffee extracting tank 50 is operated to be detached from the connecting members 80A and 80B by being released from the pressurization.

Thus, even if high pressure acts on the coffee extraction tank 50, each end of the coupling portion 54A and the extraction liquid outlet 54B is pressed by the connecting member support plate 84 upwardly by the pressing means 90, And can be coupled to the mounting jaws 82 of the first and second connecting members 80A and 80B while keeping airtight.

The valve device 60 is for filtering the coffee extract liquid finally extracted from the coffee extraction tank 50 and temporarily storing it and then discharging the coffee extract liquid to a container which is seated inside the case 92. The valve device 60 includes a lower connection member 80B A primary valve 62 connected to the upper end of the primary valve 62 so as to communicate with the upper end of the primary valve 62 so as to open or close the coffee extract so as to supply or cut the extracted coffee extract, A secondary valve 64 connected to an end of the final filtration unit 64, that is, a lower end thereof, for discharging the coffee extract finally filtered by the final filtration unit 64 to the container, (66).

The primary valve 62 is used for shutting off the supply of the coffee extract when removing the final filtration unit 64 for the purpose of cleaning or maintenance.

The final filtration unit 64 is for temporarily storing the coffee extract discharged after opening the primary valve 62 and temporarily storing it. The final filtration unit 64 includes an open end The upper portion of the primary valve 62 is connected to the lower end of the primary valve 62 by a fastening structure or a welding process. And a housing 64C which is coupled by the same fastening means and is coupled to the other end (lower end region) of the secondary valve 66 and has a mouth 64B for checking the coffee extract to be stored . At this time, as shown in FIG. 3, the final filtration filter 64A is open only in the upper region coupled to the lower end of the joint coupling 63, and the lower region is formed as a mesh-like filtration portion. The housing 64C is formed in a hollow pipe shape in which a penetrating portion 64B is formed on the front surface, and a transparent portion 64B made of glass can be provided on the front surface. The housing 64C may be formed of various structures and materials.

On the other hand, the joint coupling 63 is provided with a gas outlet for discharging gas generated in the housing 64C. This gas outlet is for discharging the gas generated by the coffee extract temporarily stored in the housing 64C or for discharging the overflowing coffee extract.

The valve device (60) is located inside the hollow case (92).

It is a matter of course that a sealing ring or an airtight packing is provided at the connecting portion of each component to maintain airtightness.

The operation of the coffee extracting apparatus using cold water according to the present invention will now be described.

First, in order to extract the coffee, the pressing and mounting pressurizing cylinder 94 is lowered and the upper and lower connecting members 80A and 80B are further separated from each other than when the coffee extracting tank 50 is mounted, After the filtration filter 52 is installed on the inner lower side of the coffee extracting tank 50, the coffee powder is put in.

Thereafter, a filtration filter 52 is additionally provided in the upper portion of the inside of the coffee extraction tank 50 in which the coffee grounds are contained. The filtration filter 52 installed on the upper portion is for blocking the backflow of the coffee powder to the cold water on-off valve 70 side.

4, the extract outlet 54B of the coffee extracting tank 50 is fitted to the lower connecting member 80B so that the lower end of the extract outlet 54B is positioned on the seating jaw of the lower connecting member 80B 82, respectively.

Subsequently, using the switch 49F for removing / attaching the control box 49D, the pressing and releasing cylinder 94 is advanced to cause the connecting member supporting plate 84 to ascend upward.

When the pressing and releasing cylinder 94 is moved forward, the case 92 coupled to the rod of the pressing and releasing cylinder 94 is lifted up. As a result, The valve device 60 and the lower connecting member 80B are raised. Therefore, the coffee extracting tank 50 having the extract outlet 54B coupled to the lower connecting member 80B also ascends.

The coffee extracting tank 50 ascending by the above-described process is configured such that the engaging portion 54A is inserted into the upper side connecting member 80A and is kept in tight contact with the seating jaw 82 to be closely contacted, The operation of the pressing and mounting pressure cylinder 94 is stopped.

By this process, the installation of the coffee extraction tank 50 is completed.

Then, the pressure regulating switch 49C corresponding to the distribution stage of the coffee filled in the coffee extracting tank 50 is selected and the operation is turned on. If the coffee filled in the coffee extraction tank 50 has a roasting step before the middle of the roasting, the pressure control switch 49C for generating the corresponding pressure is selected and turned on. This is because, as described above, the characteristics and components of the coffee can be optimized only by varying the extraction pressure according to the degree of roasting of the coffee. In this manner, the extraction pressure can be easily varied according to the characteristics of the coffee, so that an extract having a taste and aroma unique to coffee can be obtained.

When the pressure regulating switch 49C is operated in the above-described process, the microcomputer 49E causes the driving unit 48 to actuate the pressurizing cylinder 42 to cause the piston 44 to descend.

When the piston 44 descends, the cold water stored in the cold water receiving cylinder 46 is supplied to the coffee extracting tank 50 through the cold water opening / closing valve 70 while being pressurized to a predetermined pressure.

At this time, when the pressure inside the cold water receiving cylinder 46 sensed by the pressure gauge 49A rises above the set value, the microcomputer 49E stops the operation of the driving unit 48, So that the cylinder 42 is operated to contract (rise operation).

When the cold water passes through the coffee extraction tank 50 at a predetermined pressure, the cold water at a predetermined pressure passes through the pores of the fine coffee particles and flows into the extract outlet 54B together with various components contained in the coffee . That is, the coffee extract is discharged to the extract outlet 54B.

The coffee extract discharged through the outlet 54B passes through the primary valve 62 and finally passes through the final filter 64A. The filtered coffee extract solution is temporarily stored in the housing 64C while passing through the final filtration filter 64A.

Thus, the user can identify the coffee extract stored inside through the penetration portion 64B.

Then, the container is placed inside the case 92 so as to be positioned below the secondary valve 66, and then the secondary valve 66 is opened. In this process, the coffee extract extracted with cold water can be supplied to the container.

By this process, coffee contained in the coffee extraction tank 50 is extracted by cold water supplied at a power extraction pressure corresponding to the power distribution stage, whereby a low-caffeinated coffee stock solution can be obtained, and a coffee stock solution with excellent taste and aroma can be obtained . According to this structure, since the coffee extract is not brought into contact with air, it is possible to prevent deterioration of taste and aroma due to oxidation of coffee.

On the other hand, when the extraction of the coffee is completed, the cold water on-off valve 70 is closed and the pressurizing cylinder 94 for back-and-forth is operated backward to insert the coffee extracting tank 50 To be separated from the upper linking member 80A.

When the upper and lower connecting members 80A and 80B are separated from each other by this process, the coffee extraction tank 50 is detached and a new coffee extraction tank 50 is mounted in the above-described process.

When the extraction of the coffee in the above-described process is completed, the lowered piston 44 is raised to return to the home position, that is, the state before pressing, by the operation of the driving unit 48. When the piston 44 is lifted, a negative pressure is generated in the cold water receiving cylinder 46, so that the cold water stored in the cold water replenishing tank 47C while the valve 47A is opened passes through the replenishing pipe 47B Is supplied to the lower region of the cold water receiving cylinder (46). This cold water supply operation is performed by the valve 47A which operates on the negative pressure due to the upward movement of the piston 44, so that a separate supply pumping means becomes unnecessary.

Then, in order to extract the coffee again, the cold water on-off valve 70 which has been closed is opened and the driving unit 48 is operated.

As described above, the coffee extract liquid rich in taste and aroma can be obtained by passing room temperature water or cold water which has not been heated at a high pressure through the fine coffee powder contained in the coffee extraction tank 50.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

30: Frame 32: Installation space
34A, 34B: Upper and lower support plate 36: Column
40: pressing part 42: pressing cylinder
44: Piston 46: Cold water cylinder
46A: cold water outlet 47: water supply part
47A: valve 47B: supplementary pipe
47C: cold water replenishing tank 48:
49: control unit 49A: pressure gauge
49B: ON / OFF switch 49C: Pressure regulating switch
49D: Control Box 49E: Microcomputer
49F: Switch for removing and mounting
50: Coffee extraction tank 52: Filtration filter
54A: Coupling portion 54B: Extract outlet
60: valve device 62: primary valve
63: joint cuff ring 64:
64A: final filtration filter 64B:
64C: Housing 66: Secondary valve
70: cold water opening / closing valve 80A, 80B: connecting member
82: seating chin 90: pressing means
92: Case 94: Pressurizing cylinder for removing and mounting

Claims (14)

A frame which is elongated in the horizontal direction or the vertical direction and forms an installation space between both ends;
And a cold water receiving cylinder provided on one side of the installation space and having a pressurizing cylinder for operating the pressurizing piston forward and backward and one end connected to the piston and the other end provided with a cold water outlet, A pressurizing portion for pressurizing and discharging the cold water inside the cylinder at a predetermined pressure;
And an extracting part for discharging the extracted coffee extract while passing the coffee inside through the pressurizing part at a predetermined pressure is provided at the other end of the coffee maker, A coffee extracting tank having an outlet formed therein and having a filtering filter for preventing the escape of coffee particles from the outlet of the outlet; And
And a valve device coupled to be connected to the extracting outlet for temporarily storing and selectively discharging the coffee extract discharged from the coffee extracting tank,
And a cold water opening / closing valve for selectively opening / closing the cold water discharged to the cold water discharge port is installed between the cold water discharge port and the engaging portion,
A hollow connecting member is provided between the outlet side of the cold water opening / closing valve and the engaging portion and between the valve device and the outlet for the extraction of the coffee extracting tank, ,
The cold water in the cold water receiving cylinder is pressurized to a predetermined pressure by the pressurizing piston so that the cold water passes through the coffee extracting tank at a predetermined pressure to extract the coffee.
Coffee extraction system using cold water. The method according to claim 1,
Characterized in that the pressurizing portion, the coffee extraction tank and the valve device are arranged in a straight line.
Coffee extraction system using cold water. The method according to claim 1,
The pressurizing cylinder includes:
Further comprising a driving portion for causing said piston to expand and contract by an electric motor, or to extend and contract said piston by hydraulic or pneumatic pressure.
Coffee extraction system using cold water. The method of claim 3,
The pressing portion
A pressure gauge installed in the region of the cold water outlet for measuring the pressure inside the cold water receiving cylinder;
A pressure regulating switch for controlling the pressure applied to the cold water receiving cylinder by selectively controlling the operation of the pressurizing cylinder and a control box provided on the frame, ; And
And a microcomputer electrically connected to the pressure gauge and the driving unit and configured to control the driving unit based on a pressure value measured by the pressure gauge.
Coffee extraction system using cold water. The method according to claim 1,
In the region of the cold water outlet,
And a water supply unit for supplying purified water to the cold water receiving cylinder when the piston is contracted,
The water supply unit,
A supplementary pipe having one end connected to the cold water discharge port and the one-way valve or the electromagnetic valve at an intermediate portion thereof; And
And a cold water replenishing tank coupled to the other end of the replenishing pipe and having a water filter and connected to the water pipe or the cold water storage passage,
Coffee extraction system using cold water. 6. The method of claim 5,
Wherein the cold water replenishing tank comprises:
Wherein the water supply cylinder is installed at a position equal to or higher than the height of the cold water receiving cylinder.
Coffee extraction system using cold water. delete delete The method according to claim 1,
Wherein the coupling portion and the extraction liquid outlet are coupled to the respective coupling members in a screw-fastening structure,
Coffee extraction system using cold water. The method according to claim 1,
The coupling portion and the extraction liquid outlet are connected,
The end of the coupling portion and the end of the extraction liquid outlet are respectively inserted into the respective connecting members, and then the pressing force of the pressing means for selectively pushing the coffee extraction tank in the direction of the cold water receiving cylinder is applied to the inner peripheral surface of each connecting member Wherein the first and second fastening portions are respectively in tight contact with the seating tucks formed,
Coffee extraction system using cold water. 11. The method of claim 10,
Between the connection member and the valve device coupled to the extract outlet,
A connection member supporting plate for supporting the connection member coupled to the extraction liquid outlet is provided,
Wherein the valve device is connected to the connection member through the connection member support plate.
Coffee extraction system using cold water. 12. The method of claim 11,
Wherein the valve device comprises:
A primary valve connected to the connection member for blocking or passing the coffee extract to be extracted and discharged;
A final filtration portion selectively coupled to one end of the primary valve by a coupling; And
And a secondary valve coupled to an end of the final filtration section for discharging the finally filtered coffee extract to the container by the final filtration section.
Coffee extraction system using cold water. 13. The method of claim 12,
The final filtration unit,
An open final filtration filter coupled to the outlet region of the primary valve; And
And a second valve connected to the other end of the first valve, wherein the second valve is connected to the end of the first valve and the second valve is connected to the end of the first valve, And a housing having a transparent portion.
Coffee extraction system using cold water. 14. The method of claim 13,
Wherein the pressing means comprises:
A case in which the valve device is housed and the one end is coupled to the connecting member supporting plate; And
And a pressurizing cylinder for pressurizing the case selectively in the direction of the cold water receiving cylinder, the pressurizing cylinder being connected to the other end of the case.
Coffee extraction system using cold water.

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