CN111343890A

CN111343890A - Water supply device for extracting coffee using vacuum force

Info

Publication number: CN111343890A
Application number: CN201880073264.6A
Authority: CN
Inventors: 郑赟津; 李智贤; 李太圭
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-20
Filing date: 2018-11-16
Publication date: 2020-06-26
Anticipated expiration: 2038-11-16
Also published as: WO2019098749A1; CN111343890B

Abstract

The present invention relates to a water supply device for coffee extraction using a vacuum force. The water supply device for coffee extraction includes: the flow path is connected with the water storage tank; a water supply container connected to the flow path and including an accommodating space capable of storing water and a water distribution member for discharging the water stored in the accommodating space to a lower portion through a plurality of water outlet holes; and a valve unit for adjusting the amount of water supplied to the water supply container by opening and closing the flow path, wherein an air passage communicating with the outside is formed in the water supply container, and the water supply device for coffee extraction further comprises an air passage opening and closing device capable of opening and closing the air passage. According to this configuration, the present invention can provide the water supply device for coffee extraction, which can adjust the supply rate and amount of water to be supplied to the coffee powder by forming a vacuum force inside the water supply container, and can uniformly and dispersedly supply the supplied water to a plurality of positions of the coffee powder.

Description

Water supply device for extracting coffee using vacuum force

Technical Field

The present invention relates to a water supply device for coffee extraction using a vacuum force.

Background

In general, when coffee is extracted using coffee beans, depending on the temperature of water used for extracting coffee, drip coffee, in which coffee is extracted using warm water, and iced drip coffee (cold-boiled coffee), in which coffee is extracted using normal-temperature water or cold water, can be classified.

The drip coffee is coffee extracted in a short time of about 3 minutes, in which warm water is charged into a coffee pot and the user pours the warm water uniformly into coffee powder in a filter cup and extracts the coffee powder. The iced drip coffee is coffee extracted by allowing water of normal temperature contained in a water tank to fall through a valve toward a coffee basket containing coffee powder for about 3 to 20 hours.

The taste of the drip coffee produced through such a process varies depending on the method of supplying water to the coffee powder, the supply time, and the like, and therefore, the experience and secret of the user who extracts the coffee are very important. Therefore, in the coffee shop, in the case of a coffee maker who extracts drip coffee, it is necessary to repeat the work of lifting the coffee pot for a long time and supplying water to coffee powder accurately and precisely, and thus many difficulties are encountered.

In addition, in the iced drip coffee, water falling toward the coffee basket through the valve is concentrated only at the central portion of the coffee basket, so that coffee components are excessively extracted from the coffee powder contained in the central portion of the coffee basket, and the water is not normally supplied as the coffee powder is separated from the central portion, so that the extracted coffee components are excessively reduced, and the taste of the coffee is also deteriorated.

Recently, various water supply devices have been developed that can uniformly distribute and supply water to a filter cup or a coffee basket when drip coffee is extracted or iced drip coffee is extracted by the drip coffee.

Fig. 1 is a sectional view showing an example of a conventional drip coffee maker.

The drip coffee maker comprises: a first container 10 having a first through-hole provided at a lower end portion thereof so as to allow water to be discharged downward; a second container 20, which is a container for containing water discharged from the first through-holes, is disposed below the first container 10, and has a plurality of second through-holes at a lower end portion thereof so that water contained therein can be discharged to the coffee powder; and a third container 30 for containing coffee powder and water discharged from the second through-hole, which is disposed below the second container 20 and has a third through-hole at a lower end thereof so that the extracted drip coffee can be discharged downward.

A plurality of branch pipes having a predetermined inner diameter are connected to the lower end of the second container 20, and a second through hole is formed at the end of such a branch pipe. The water contained in the second container 20 is slowly discharged through the second through-hole, and after the water contained in the first container 10 is supplied to the second container 20, the coffee powder uniformly drops into the third container 30 through the second through-hole. However, since the speed and amount of water supplied from the first tank 10 to the second tank 20 cannot be individually adjusted, the water flows into the second tank 20 too much and overflows upward, or the speed of water falling through the second through-holes is changed according to the change of the water pressure as the amount of water in the second tank 20 is changed.

In this case, not only the coffee extraction conditions cannot be constantly maintained, but also it is difficult for a user to prepare drip coffee of various flavors and tastes by adjusting the supply rate and amount of water.

Therefore, there is a need for developing a water supply device for coffee extraction that can be easily installed on a filter cup or a coffee basket for use when extracting a manual drip coffee or an ice drip coffee, can adjust the supply rate and amount of water supplied to coffee powder, and can uniformly and dispersedly supply the supplied water to a plurality of positions of the coffee powder.

Disclosure of Invention

Technical problem

Accordingly, an object of the present invention is to provide a water supply device for coffee extraction that can be easily installed in a drip-type filter cup, an ice-drip coffee maker, or the like for extracting coffee, can adjust the supply rate and amount of water supplied to coffee grounds, and uniformly and dispersedly supply the supplied water to a plurality of positions of the coffee grounds.

It is another object of the present invention to provide a water supply device for coffee extraction, which can easily form a vacuum force in a water supply container and quickly fill a required amount of water by allowing water in a reservoir to flow into the water supply container only by operating an air passage opening/closing device and discharging air in the water supply container to the outside.

Technical scheme

The water supply device for coffee extraction according to the present invention for achieving the above object includes: the flow path is connected with the water storage tank; a water supply container connected to the flow path and including an accommodating space capable of storing water and a water distribution member for discharging the water stored in the accommodating space to a lower portion through a plurality of water outlet holes; and a valve unit for adjusting the amount of water supplied to the water supply container by opening and closing the flow path, wherein an air passage communicating with the outside is formed in the water supply container, and the water supply device for coffee extraction further comprises an air passage opening and closing device for opening and closing the air passage.

A water supply device for coffee extraction according to still another embodiment of the present invention includes: the flow path is connected with the water storage tank; a water supply container connected to the flow path and including an accommodating space capable of storing water and a water distribution member for discharging the water stored in the accommodating space to a lower portion through a plurality of water outlet holes; and a valve unit for adjusting the amount of water supplied to the water supply container by opening and closing the flow path, wherein the flow path between the valve unit and the water supply container communicates with an air passage communicating with the outside, and the water supply device for coffee extraction further comprises an air passage opening and closing device for opening and closing the air passage, and wherein a vacuum force is generated in the water supply container by opening the valve unit to open the air passage while the water supply container is filled with water, and the air passage is closed by the air passage opening and closing device after the water supply container is filled with a predetermined amount of water.

A water supply device for coffee extraction according to another embodiment of the present invention includes: the flow path is connected with the water storage tank; a water supply container connected to the flow path and including an accommodating space capable of storing water and a water distribution member for discharging the water stored in the accommodating space to a lower portion through a plurality of water outlet holes; and a valve unit that adjusts an amount of water supplied to the water supply container by opening and closing the flow path, the valve unit being connected to an air passage communicating with an outside, the water supply device for coffee extraction further comprising an air passage opening and closing device that opens and closes the air passage, and a vacuum force is generated in the water supply container by opening the valve unit to open the air passage while the water supply container is filled with water, and closing the air passage by the air passage opening and closing device after the water supply container is filled with a predetermined amount of water.

Further, a plurality of projections are formed to project downward on the bottom surface of the water distributing member, and the water outlet holes are formed to penetrate the projections, respectively.

The present invention also includes a cover member capable of closing the plurality of water outlet holes of the water distribution member.

Furthermore, the present invention includes: a temperature sensor for measuring the temperature of the water contained in the water supply container; and a temperature display unit for displaying the temperature measured by the temperature sensor.

A water supply device for coffee extraction according to still another embodiment of the present invention includes: a water storage tank; a water supply container connected to the water storage tank through a flow path, and including an accommodating space capable of storing water and a water distribution member for discharging the water stored in the accommodating space to a lower portion through a plurality of water outlet holes; and a valve unit for adjusting the amount of water supplied to the water supply container by opening and closing the flow path, wherein the water storage tank is positioned above the water supply container, and an air passage is formed in the water supply container to pass through the water supply container to the inside of the water storage tank and communicate with the outside.

And a water inlet is formed in the air passage penetrating the water storage tank, and through the water inlet, the water in the water storage tank can flow into the air passage, the water flowing into the air passage can flow into the water supply container through the inflow port, the air passage opening/closing means is capable of opening and closing the inlet port, and when the inlet port is opened by the air passage opening/closing means, the water flowing into the air passage flows into the water supply container and, at the same time, the air in the water supply container may be discharged through the air passage, and if the inlet port is closed by the air passage opening/closing device, the inflow of water through the air path is blocked and a vacuum force is formed inside the water supply container by closing the air path.

Further, a second air passage opening/closing device capable of opening and closing the air passage is additionally provided in the air passage above the water inlet.

The valve unit is provided in the air passage, the adjustment lever of the valve unit and the adjustment lever of the air passage opening/closing device are integrally formed as an integrated adjustment lever, the air passage is opened and closed by operating the integrated adjustment lever to form a vacuum force in the water supply container, and the integrated adjustment lever is operated to adjust the amount of water supplied to the water supply container after the vacuum force is formed in the water supply container.

A water supply device for coffee extraction according to another embodiment of the present invention includes: a water storage tank; a water supply container connected to the water storage tank through a flow path, and including an accommodating space capable of storing water and a water distribution member for discharging the water stored in the accommodating space to a lower portion through a plurality of water outlet holes; and a valve unit that adjusts an amount of water supplied to the water supply container by opening and closing the flow path, wherein the valve unit is connected to an air flow path that communicates with an outside, and functions as an air path opening and closing device that opens and closes the air path, and wherein a vacuum force is generated inside the water supply container by opening the valve unit to open the air path while the water supply container is filled with water, and closing the air path by the valve unit after the water supply container is filled with a predetermined amount of water.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, the water supply device for coffee extraction can provide a vacuum force inside the water supply container, and can adjust the supply rate and amount of water to be supplied to the coffee powder, thereby uniformly and dispersedly supplying the supplied water to a plurality of positions of the coffee powder.

According to the present invention, it is possible to provide a water supply device for coffee extraction, which can easily form a vacuum force in the water supply container and quickly fill a required amount of water by allowing water in the water reservoir to flow into the water supply container only by operating the air passage opening/closing device and discharging air in the water supply container to the outside.

Drawings

Fig. 2 is a diagram showing a structure of a water supply device for coffee extraction according to an embodiment of the present invention.

Fig. 3 is a diagram showing a structure of a water supply device for coffee extraction according to still another embodiment of the present invention.

Fig. 4a and 4b are views showing the structures of a water supply container and an air passage opening/closing device according to an embodiment of the present invention.

Fig. 5 is a view showing the structures of a water supply container and an air passage opening/closing device according to another embodiment of the present invention.

Fig. 6 is a view showing the structures of a water supply container and an air passage opening/closing device according to still another embodiment of the present invention.

Fig. 7 is a diagram showing a configuration of a flow path between a valve unit and a water supply tank and an air passage opening/closing device according to still another embodiment of the present invention.

Fig. 8a and 8b are views showing the structures of a water supply container, a valve unit, and an air passage opening/closing device according to still another embodiment of the present invention.

Fig. 9a and 9b are views showing the structures of a water supply container, a valve unit, and an air passage opening/closing device according to still another embodiment of the present invention.

Fig. 10 is a view showing a structure of a water supply device for coffee extraction according to still another embodiment of the present invention.

Fig. 11 is a view showing a structure of a water supply device for coffee extraction according to still another embodiment of the present invention.

Fig. 12a and 12b are views showing the structure of a water supply device for coffee extraction according to still another embodiment of the present invention.

Fig. 13a and 13b are views showing the structure of a water supply device for coffee extraction according to still another embodiment of the present invention.

Fig. 14a and 14b are views showing the structure of a water supply device for coffee extraction according to still another embodiment of the present invention.

Fig. 15 is a view showing the water supply device for coffee extraction shown in fig. 14a in an exploded state.

Fig. 16 is a view showing an assembled state of the valve unit in fig. 15.

Fig. 17a and 17b are views showing the structure of a water supply device for coffee extraction according to still another embodiment of the present invention.

Description of reference numerals

1: the drip server 2: filter cup

3: and (4) a filter: coffee powder

101: reservoir body 102: water storage tank

110: flow path 120: water supply container

121: the housing space 122: water dispensing component

123: projection 124: water outlet

127: temperature sensor 128: temperature display unit

130: the valve unit 140: air passage

150: air passage opening and closing device

1110: reservoir 1120: water supply container

1121: the housing space 1122: water dispensing component

1122 a: water outlet 1130: valve unit

1131: barrel part 1131 a: water inlet

1131 b: inflow port 1132: insert part

1132 a: threaded portion 1133: adjusting rod

1140: air passage 1150: air passage opening and closing device

1250: air passage opening/closing device 1251: insert part

1251 a: blocking portion 1252: guide part

1253: adjusting the rod 1430: valve unit

1431: barrel part 1431 a: valve inlet

1431 b: valve flow inlet 1432: insert part

1432 a: the threaded portion 1433: adjusting rod

1434: second blocking portion 1435: blocking part

1440: air passage 1441: water inlet

1442: inflow port 1443: step part

1530: valve unit 1511: water inlet

1512: inflow port 1532: blocking part

Detailed Description

Hereinafter, the structure and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the process of assigning reference numerals to constituent elements in the respective drawings, the same constituent elements are assigned the same reference numerals as much as possible in the different drawings.

An object of the present invention is to provide a water supply device for coffee extraction using a vacuum force, which can adjust the speed and amount of water supplied to coffee powder and uniformly distribute and supply the supplied water to a plurality of positions of coffee powder.

Fig. 2 is a diagram showing a structure of a water supply device for coffee extraction according to an embodiment of the present invention. Fig. 3 is a diagram showing a structure of a water supply device for coffee extraction according to still another embodiment of the present invention. Fig. 4a and 4b are views showing the structures of a water supply container and an air passage opening/closing device according to an embodiment of the present invention.

Referring to fig. 2, the water supply device for coffee extraction (hereinafter, referred to as water supply device) of the present invention includes a flow path 110, a water supply container 120, a valve unit 130, an air passage 140, and an air passage opening/closing device 150.

The flow path 110 is connected to the reservoir 102. The reservoir tank 102 is housed in the reservoir tank body 101, and supplies water for extracting coffee to the water supply container 120 through the flow path 110. The reservoir 102 may be circular, quadrilateral, or the like.

The reservoir 102 may be positioned at an upper portion of the flow path 110, and as shown in fig. 3, the reservoir 103 may be positioned at a lower portion of the flow path 110, and water in the reservoir 103 may be supplied to the water supply container 120 through the flow path 110 according to the suction pressure.

The water supply container 120 is connected to the flow path 110. The water supply container 120 includes: an accommodating space 121 for storing water; and a water distribution member 122 for discharging the water stored in the storage space 121 to the lower part through the plurality of water outlet holes 124. Water can be uniformly dispersed toward the lower filter bowl 2 or coffee basket and dropped by the water dispensing part 122.

When water dispensing member 122 is assembled to the bottom surface of water supply container 120, water tightness is maintained by using a sealing member such as an O-ring, and water dispensing member 122 can be separated from water supply container 120 and washed as needed.

The water distributing member 122 has a circular plate shape, and a coupling portion protruding to be closely attached to an inner surface or an outer surface of the open bottom surface of the water supply container 120 may be formed on an upper surface thereof. A plurality of projections 123 may be formed on the bottom surface of the water distributing member 122, and the nozzle hole 124 may be formed to penetrate the projections 123.

At the outer side edge of the water dispensing part 122, a guide protrusion 126 may be formed along the circumference thereof. By means of the above-mentioned guide projection 126, when the water supply means is positioned at the upper portion of the filter bowl 2, the initial set state is directly maintained and the detachment from the filter bowl 2 or the coffee basket can be prevented.

Valve unit 130 adjusts the amount of water supplied to water supply container 120 by opening and closing flow path 110.

The air passage 140 communicates with the outside so that a vacuum force can be formed inside the water supply container 120 by discharging the air inside the water supply container 120. For example, may be formed at an upper portion of the water supply container 120.

The air passage opening/closing device 150 is for opening and closing the air passage 140, and may be in a lid form, for example.

As shown in fig. 4a, when the valve unit 130 is opened, an appropriate amount of water is charged into the water supply container 120 through the flow path 110. In this case, when air passage 140 is opened by air passage opening/closing device 150, water can be filled into water supply container 120, and air inside water supply container 120 can be discharged to the outside through air passage 140. As described above, when the water supply container 120 is filled with water, air is discharged to the outside by an amount corresponding to the amount of water flowing into the water supply container 120 through the opened air passage 140, and water flows more easily into the water supply container 120, so that water can be quickly filled into the water supply container 120.

The opening degree of the valve unit 130 is adjusted so that the amount of water flowing into the water supply container 120 through the flow path 110 is greater than the amount of water discharged through the water outlet holes 124, thereby filling the water supply container 120 with water. It is preferable that the valve unit 130 is opened to the maximum extent to allow water to rapidly flow into the inside of the water supply container 120, and at the same time, air inside the water supply container 120 is discharged through the air passage 140. If a predetermined amount of water is filled into the water supply container 120, the valve unit 130 is closed.

In order to quickly fill the water supply container 120 with water, a cover member 125 capable of closing the plurality of water outlet holes 124 may be provided at a lower portion of the water dispensing member 122. When water is filled into the water supply container 120, the outlet hole 124 is combined with the cover member 125 to prevent water from being discharged through the outlet hole 124, whereby the water supply container 120 can be quickly filled with water.

After a suitable amount of water is charged into water supply container 120, air passage 140 is closed by air passage opening/closing device 150 and cover member 125 is removed, as shown in fig. 4 b. Preferably, the outlet hole 124 has a diameter of 2mm or less to prevent external air from flowing in through the outlet hole 124. After the air inside the water supply container 120 is discharged to the outside, if the air does not flow into the water supply container 120 any more, a vacuum force may be formed inside the water supply container 120. As described above, when water is filled in water supply container 120 through valve unit 130, a vacuum force can be generated in water supply container 120 by opening and closing air passage 140 through air passage opening/closing device 150.

In this case, if the intensity of the vacuum force is greater than or equal to the gravity acting on the water discharged through the water outlet hole 124, the water stored in the water supply container 120 is not discharged through the water outlet hole 124, but is confined inside the water supply container 120.

The present invention may include a temperature sensor 127 for measuring the temperature of the water contained in the water supply container 120, and a temperature display unit 128 may be disposed outside the water supply container 120 to display the temperature measured by the temperature sensor 127.

In the case of using the water supply apparatus of the present invention having such a structure, the cover member 125 is attached to the water dispensing member 122, and the water is filled into the water supply container 120 from the flow path 110 by appropriately adjusting the valve unit 130 in a state where the air path 140 is opened by adjusting the air path opening/closing device 150.

In the process of filling water into water supply container 120, air inside water supply container 120 is discharged to the outside through air passage 140, and when an appropriate amount of water is filled into water supply container 120, valve unit 130 is closed and air passage 140 is closed by air passage opening/closing device 150. In this case, the air inside the water supply container 120 is discharged to the outside, and when the lid member 125 is removed, a predetermined amount of water is discharged to the water outlet hole 124 by the gravity of the water inside the water supply container 120, thereby forming a vacuum force inside the water supply container 120.

Next, in a state where the filter bowl 2 is placed on the upper portion of the drip server 1, an appropriate amount of coffee powder 4 is charged into the filter 3 provided inside the filter bowl 2, and the coffee powder 4 is positioned below the water dispensing member 122.

Then, when the valve unit 130 is appropriately opened to supply water to the water supply container 120, the supplied amount of water is discharged through the plurality of outlet holes 124 and uniformly drops toward the coffee grounds 4, and the water in the water supply container 120 is always maintained at a predetermined amount. The amount of water falling down to the coffee powder 4 can be adjusted by adjusting the valve unit 130.

As described above, according to the water supply apparatus of the present invention, the vacuum force is formed inside the water supply container 120 by the air path 140 and the air path opening and closing means 150, the vacuum force can adjust the supply speed and amount of the water supplied to the coffee powder 4, and the supplied water can be uniformly and dispersedly supplied to a plurality of positions of the coffee powder 4.

Fig. 5 to 7 are views showing the structures of a water supply container and an air passage opening and closing device according to another embodiment of the present invention.

Referring to fig. 5, an air discharge flow path 251 may be formed at an upper side of the water supply container 220, and an air passage 240 communicating with the outside may be formed at the air discharge flow path 251. The air passage opening/closing device 250 is in the form of a cover and can open and close the air passage 240.

Referring to fig. 6, an air discharge flow path 351 is formed at the bottom of water supply container 320 to extend into water supply container 320 through water dispensing member 322. The upper end of the air discharge passage 351 may communicate with the inside of the water supply container 320, and the lower end may be an air passage 340 communicating with the outside. The air passage opening/closing device 350 may be in a cover form and may open and close the air passage 340.

Referring to fig. 7, the flow path 410 between the valve unit 130 and the water supply tank 420 communicates with the air discharge flow path 451, and an air path 440 communicating with the outside may be formed in the air discharge flow path 451. The air passage opening/closing means 450 may be in a cover state so as to open and close the air passage 440.

The valve unit 530 includes: a valve flow path 531 which communicates with the flow path 510 and the water supply container 520 at the same time; and an adjusting valve 532 provided in the valve flow path 531 to open and close the flow path 510. For example, the valve unit 530 may be provided at an upper portion of the water supply container 520 so as to be connected to the flow path 510.

An air passage 540 may be formed at one side of the valve flow passage 531 to be connected to an upper portion of the water supply container 520, and the air passage opening and closing device 550 may have a cover shape to open and close the air passage 540.

The valve unit 630 includes: a valve flow path 631 communicating with the flow path 610 and the water supply tank 620; and an adjusting valve 632 provided in the valve flow path 631 to open and close the flow path 610. The valve unit 630 is provided above the water supply container 620 so as to be connected to the flow path 610.

In the present embodiment, the water dispensing part 622 is coupled to the water supply container 620 by a screw, and in the coupled state, water tightness is maintained by a sealing part such as an O-ring 627. The water dispensing member 622 is rotated with respect to the water supply container 620, and thereby can be moved in the vertical direction around the screw. A plurality of protrusions 623 may be formed on the bottom surface of the water distributing member 622, and the outlet hole 624 may be formed to penetrate the inside of the protrusions 623.

An air passage 640 may be formed at one side of the water supply container 620 or the water dispensing part 622, and the air passage 640 may be opened and closed by rotating the water dispensing part 622 with respect to the water supply container 620.

As shown in fig. 9b, when the valve unit 630 is moved to open the flow path 610 and the water dispensing member 622 is rotated with respect to the water supply container 620 to open the air path 640, water can flow into the water supply container 620 and the air in the water supply container 620 is discharged through the air path 640 to form a vacuum force.

As described above, in the air passage opening/closing device for opening and closing the air passage 640, the housing space of the water supply container 620 is formed by joining 2 members, the air passage 640 is formed at the joint portion of the 2 members, and the other member is moved relative to the one member, thereby opening and closing the air passage 640.

In the above embodiment, the vacuum force is generated by opening the valve unit to allow water to flow into the water supply tank and air in the water supply tank to be discharged to the air passage, or by injecting water through an opening formed by the air passage opening/closing device and discharging air in the water supply tank through the air passage without opening the valve unit and then closing the air passage.

Referring to fig. 10, the water supply apparatus for coffee extraction (hereinafter, referred to as water supply apparatus) according to the present invention includes a water storage tank 1110, a water supply container 1120, a valve unit 1130, an air passage 1140, and an air passage opening/closing device 1150.

The sump 1110 is a portion for storing water supplied to the water supply container 1120. The sump 1110 is located at an upper portion of the water supply container 1120.

The water supply container 1120 is connected to the water reservoir 1110 through a flow path. The water supply container 1120 includes: the accommodating space 1121 may be used for storing water; and a water distribution member 1122 for discharging water stored in the storage space 1121 to the lower portion through the plurality of water outlet holes 1122 a. The water can be uniformly dispersed and dropped toward the lower positioned filter cup or coffee basket by the water dispensing part 1122.

When water dispensing member 1122 is attached to the bottom surface of water supply container 1120, water tightness is maintained by using a sealing member such as an O-ring, and water dispensing member 1122 can be separated from water supply container 1120 as needed to perform washing.

The water distributing member 1122 has a circular plate shape, and a coupling portion protruding to be closely attached to an inner surface or an outer surface of the open bottom surface of the water supply container 1120 may be formed on an upper surface thereof. A plurality of projections may be formed on the bottom surface of the water distributing member 1122, and the water outlet hole 1122a may be formed to penetrate the projections.

On the outer side edge of the water dispensing part 1122, a guide protrusion may be formed along the circumference thereof. By the guide projection, when the water supply device is positioned at the upper part of the filter cup, the initial setting state is directly maintained and the separation from the filter cup or the coffee basket can be prevented.

Valve unit 1130 opens and closes the flow path to adjust the amount of water supplied to water supply tank 1120. The valve unit 1130 may include: a drum member 1131 extending from the water supply container 1120 to the inside of the water storage tank 1110; an insertion member 1132 inserted into the drum member 1131; and an adjustment rod 1133 on the upper portion of the insertion member 1132.

The drum member 1131 includes: an inlet 1131a in fluid communication with reservoir 1110; and an inflow port 1131b in fluid communication with the water supply container 1120. The flow path formed by the water inlet 1131a and the water inlet 1131b is a flow path connecting the water storage tank 1110 and the water supply container 1120.

A screw portion 1132a may be formed on an outer side surface of the insertion member 1132 to be screw-coupled to an inner side surface of the barrel member 1131. The amount of water supplied from reservoir 1110 to water supply container 1120 can be adjusted by rotating adjustment lever 1133 through inlet 1131 b.

The air path 1140 communicates with the outside so that a vacuum force can be formed inside the water supply container 1120 by discharging the air inside the water supply container 1120. Air passage 1140 passes through water supply container 1120 into water reservoir 1110.

The air passage opening/closing device 1150 may be used to open and close the air passage 1140, and may be in a lid form, for example.

When the flow path is opened by the valve unit 1130, an appropriate amount of water is charged into the water supply tank 1120 through the inlet 1131 b. In this case, when air passage 1140 is opened by air passage opening/closing device 1150, water is filled in water supply container 1120, and air in water supply container 1120 can be discharged to the outside through air passage 1140.

As described above, when water is filled into the water supply container 1120, air corresponding to the amount of water flowing into the water supply container 1120 is discharged to the outside through the open air passage 1140, and water more easily flows into the water supply container 1120, so that the water supply container 1120 can be quickly filled with water.

By adjusting the degree of opening of the flow path by the valve unit 1130, the amount of water flowing into the water supply tank 1120 through the flow path is larger than the amount of water discharged through the water outlet hole 1122a, and the water supply tank 1120 is filled with water. It is preferable that the valve unit 1130 opens the flow path to the maximum extent to allow water to rapidly flow into the water supply container 1120, and air in the water supply container 1120 is also discharged through the air path 1140. If a proper amount of water is charged into the water supply container 1120, the valve unit 1130 is closed.

After the air inside the water supply container 1120 is discharged, if the air is not flowed into the water supply container 1120 any more, a vacuum force may be formed inside the water supply container 1120. As described above, when water is filled into water supply container 1120 through valve unit 1130, a vacuum force can be generated inside water supply container 1120 by opening and closing air passage 1140 through air passage opening and closing device 1150.

In this case, if the intensity of the vacuum force is greater than or equal to the gravity acting on the water discharged through the water outlet hole 1122a, the water stored in the water supply container 1120 is not discharged through the water outlet hole 1122a, but is confined inside the water supply container 1120.

Next, an appropriate amount of coffee powder is charged into the filter provided inside the filter bowl, and the coffee powder is positioned below the water dispensing member 1122.

Then, when the valve unit 1130 is appropriately opened to supply water to the water supply container 1120, the supplied amount of water is discharged through the plurality of water outlet holes 1122a and uniformly drops toward the coffee grounds 4, and the water in the water supply container 1120 is always maintained at a predetermined amount. The amount of water falling down to the coffee powder may be adjusted by adjusting the valve unit 1130.

As described above, according to the water supply apparatus of the present invention, a vacuum force is formed inside the water supply container 1120 through the air path 1140 and the air path opening/closing means 1150, and the vacuum force can adjust the supply rate and amount of water supplied to the coffee powder, and the supplied water can be uniformly and dispersedly supplied to a plurality of positions of the coffee powder.

Further, by providing water storage tank 1110 above water supply container 1120 and allowing air passage 1140 to pass through water storage tank 1110, water storage tank 1110 and water supply container 1120 can be easily integrated, and a compact water supply device can be manufactured, thereby increasing convenience of users and saving manufacturing cost.

The water supply device of this embodiment includes a water tank 1110, a water supply container 1120, a valve unit 1130, an air passage 1140, and an air passage opening/closing device 1150.

Water storage tank 1110, water supply container 1120, air passage 1140, and air passage opening/closing device 1150 have the same configurations as water storage tank 1110, water supply container 1120, air passage 1140, and air passage opening/closing device 1150 shown in fig. 10.

Valve unit 1130 opens and closes the flow path to adjust the amount of water supplied to water supply tank 1120. The valve unit 1130 is provided on one side of the reservoir 1110 and opens and closes a water inlet 1111 that is in fluid communication with the reservoir 1110 and a water inlet 1112 that is in fluid communication with the water supply container 120. The flow path formed by the water inlet 1111 and the water inlet 1112 is a flow path connecting the water storage tank 1110 and the water supply tank 1120.

An adjustment rod 1131 may be formed at an end of the valve unit 1130, and the amount of water supplied from the reservoir 1110 to the water supply container 1120 may be adjusted by the water inlet 1111 through rotation or linear movement of the adjustment rod 1131.

When the flow path is opened by the valve unit 1130, an appropriate amount of water is charged into the water supply container 1120 through the inflow port 1112, and air inside the water supply container 1120 can be discharged to the outside through the air passage 1140.

After the air inside the water supply container 1120 is discharged to the outside, if the air does not flow into the water supply container 1120 any more, a vacuum force may be generated inside the water supply container 1120.

Then, when the valve unit 1130 is appropriately opened to supply water to the water supply container 1120, the supplied amount of water is discharged through the plurality of water outlet holes 1122a and uniformly drops toward the coffee grounds, and the water in the water supply container 1120 is always maintained at a predetermined amount. The amount of water falling down to the coffee powder may be adjusted by adjusting the valve unit 1130.

The water supply device of the present embodiment has the effect of a structure similar to that of fig. 10, except for the structure of the valve unit 1130.

Referring to fig. 12a, the water supply device of the present embodiment includes a water storage tank 1210, a water supply container 1220, a valve unit 1230, an air path 1240, and an air path opening and closing device 1250.

The reservoir 1210, the water supply container 1220, and the valve unit 1230 have the same configurations as the reservoir 1110, the water supply container 1120, and the valve unit 1130 shown in fig. 10.

The valve unit 1230 may include: a barrel member 1231 extending from the water supply container 1220 to the inside of the water reservoir 1210; an insertion member 1232 inserted into the barrel member 1231; and an adjusting lever 1233 inserted into an upper portion of the member 1232.

The barrel part 1231 includes: a water inlet 1231a in fluid communication with reservoir 1210; and an inflow port 1231b in fluid communication with the water supply container 1220.

A screw portion 1232a may be formed on the outer side surface of the insertion member 1232 so as to be screwed with the inner side surface of the barrel member 1231. The amount of water supplied from the reservoir 1210 to the water supply container 1220 can be adjusted through the inlet 1231b by rotating the adjustment lever 1233.

The air passageway 1240 communicates with the outside so that a vacuum force can be formed inside the water supply container 1220 by discharging the air inside the water supply container 1220. The air passage 1240 extends from the water supply container 1220 to the inside of the water reservoir 1210.

The air passage 1240 includes: a water inlet 1241 in fluid communication with the reservoir 1210; and an inflow port 1242 in fluid communication with the water supply container 1220. Water in the reservoir 1210 can flow into the air passage 1240 through the water inlet 1241, and water in the air passage 1240 can flow into the water supply tank 1220 through the water inlet 1242.

The air passage opening/closing device 1250 opens and closes the air passage 1240, and can open and close the inflow port 1242. The air passage opening-closing device 1250 may include: an insertion member 1251 having a blocking portion 1251a for opening and closing the inflow port 1242; a guide portion 1252 attached to the insertion member 1251 to guide movement of the insertion member 1251 in the air passage 1240; and an adjusting lever 1253 at the upper portion of the insertion member 1251. A plurality of through holes through which air can be discharged are formed in the guide portion 1252. A screw may be formed in the guide portion 1252, and the insertion member may be moved up and down by an operation of rotating the adjustment lever 1253.

As shown in fig. 12b, when the adjusting lever 1253 of the air passage opening/closing device 1250 is actuated, rotated, or pressed to open the inlet port 1242, water flowing into the air passage 1240 through the inlet port 1241 flows into the water supply container 1220, and air in the water supply container 1220 is discharged through the inlet port 1242 and the air passage 1240.

If the inflow port 1242 is closed by the air passage opening and closing device 1250, the inflow of water through the air passage 1240 is blocked and the air passage 1240 is also closed, so that a vacuum force can be generated in the water supply container 1220. The vacuum force formed inside the water supply container 1220 prevents the water stored in the water supply container 1220 from being discharged through the water outlet hole 1222a, but is trapped inside the water supply container 1220.

Then, when the valve unit 1230 is appropriately opened to supply water to the water supply container 1220, the supplied amount of water is discharged through the plurality of water outlet holes 1222a and uniformly drops toward the coffee grounds 4, and the amount of water in the water supply container 1220 is always maintained at a predetermined amount. The amount of water falling down to the coffee powder can be adjusted by adjusting the valve unit 1230.

In the water supply apparatus shown in fig. 10, there is inconvenience in that the valve unit 1130 and the air passage opening/closing device 1150 need to be separately operated in order to form a vacuum force inside the water supply container 1120, and the time for charging the water supply container 1120 with a required amount of water becomes long by continuously discharging the water charged into the water supply container 1120 through the water dispensing member 1122 by operating the valve unit 1130 and the air passage opening/closing device 1150.

According to the water supply apparatus of this embodiment, the water inlet 1241 is provided in the air passage 1240 so that the water in the reservoir 1210 can flow into the air passage 1240, and only one air passage opening/closing device 1250 is operated to form a vacuum force in the water supply container 1220 without separately operating the valve unit 1230 and the air passage opening/closing device 1250. This allows a vacuum force to be easily formed inside water supply container 1220, and a required amount of water to be quickly and accurately charged into water supply container 1220.

Referring to fig. 13a, the water supply apparatus of the present embodiment includes a water storage tank 1310, a water supply container 1320, a valve unit 1330, an air path 1340, and an air path opening and closing device 1350.

The reservoir 1310, the water supply container 1320, and the valve unit 1330 have the same structures as the reservoir 1110, the water supply container 1120, and the valve unit 1130 shown in fig. 10.

The valve unit 1330 may include: a drum part 1331 extending from the water supply container 1320 toward the inside of the water storage tank 1310; an insertion member 1332 inserted into the drum member 1331; and an adjusting lever 1333 at the upper portion of the insertion part 1332.

The drum member 1331 includes: a water inlet 1331a in fluid communication with the reservoir 1310; and an inflow port 1331b in fluid communication with the water supply container 1320.

A screw portion 1332a is formed on the outer side surface of the insertion member 1332 so as to be screwed with the inner side surface of the barrel member 1331. The amount of water supplied from the water reservoir 1310 to the water supply container 1320 through the inflow port 1331b can be adjusted by rotating the adjustment lever 1333.

The air passage 1340 communicates with the outside to form a vacuum force inside the water supply container 1320 by exhausting air inside the water supply container 1320. The air passage 1340 penetrates from the water supply container 1320 to the inside of the water reservoir 1310.

The air passage 1340 includes: a water inlet 1341 in fluid communication with reservoir 1310; and an inflow port 1342 in fluid communication with the water supply container 1320. Water in the reservoir 1310 may flow into the air passage 1340 through the water inlet 1341, and water in the air passage 1340 may flow into the water supply container 1320 through the inflow port 1342.

The air passage opening/closing device 1350 opens and closes the air passage 1340, and can open and close the inlet 1342. The air passage opening and closing means 1350 may include: an insertion member 1351 having a blocking portion 1351a formed at an end thereof for opening and closing the inlet 1342; a guide portion 1352 attached to the insertion member 1351 to guide movement of the insertion member 1351 in the air passage 1340; and an adjusting lever 1353 inserted into an upper portion of the member 1351. A plurality of through-holes through which air can be discharged are formed in the guide portion 1352.

In this embodiment, a stepped portion having a reduced cross section may be formed at an upper portion of the water inlet 1341 in the air passage 1340, and a second blocking portion 1354 for opening and closing an opening formed by the stepped portion may be formed in an insertion member of the air passage opening and closing device 1350. The second blocking portion 1354 may be a second air passage opening/closing device that can open/close the air passage 1340 at the upper portion of the water inlet 1341.

Since the air passage 1340 above the inlet 1342 and the inlet 1341 can be opened and closed at the same time by adjusting the adjustment rod 1353 of the air passage opening/closing device 1350, the air passage opening/closing device 1350 also functions as a second air passage opening/closing device. The air passage opening-closing device 1350 and the second air passage opening-closing device may be formed of separate members.

In the water supply apparatus shown in fig. 12a, when water is filled up to the upper portion of the reservoir 1210, the water in the reservoir 1210 flows into the water inlet 1241 of the air passage 240, and the water is filled up to the upper end of the air passage 1240 corresponding to the height of the water in the reservoir 1210.

In this case, when the adjustment lever 1253 is operated to rotate, press or open the air passage opening/closing device 1250, water filled up to the upper end of the air passage 1240 simultaneously flows into the water supply container 1220, and there is a possibility that the air in the water supply container 1220 cannot be normally discharged upward along the air passage 1240.

A positive pressure is generated inside the water supply container 1220 due to a delay in air discharge, and water flowing into the water supply container 1220 cannot be normally filled in the upper portion of the water dispensing part 1222, and a large amount of water is discharged through the water dispensing part 1222 at the lower end. Thus, it takes a long time to fill the water supply container 1220 with water and form a vacuum force.

On the other hand, in order to form a vacuum force in the water supply container 1220, after the water storage tank 1210 is filled up to the water inlet height, the adjustment lever 1253 is operated to form a vacuum force in the water supply container 1220, and then water is filled up to the upper end of the water storage tank 1210 again.

In order to solve such a problem, in the present embodiment, a second air passage opening/closing device is additionally provided to operate in conjunction with the conventional air passage opening/closing device 1350 provided at the lower portion.

As shown in fig. 13a, when the air passage opening/closing device 1350 and the second air passage opening/closing device are closed, the step portion provided in the air passage 1340 is blocked by the second blocking portion 1354. Thus, even if precipitation fills the upper end of the reservoir 1310, only a small amount of water is filled in the air passage 1340 up to the step.

As shown in fig. 13b, when the adjustment lever 1353 is operated to completely open the air passage 1340, water flows into the water supply container 1320, and air in the water supply container 1320 is smoothly discharged upward through the air passage 1340, so that a vacuum force can be rapidly generated in the water supply container 1320.

Then, when the valve unit 1330 is appropriately opened to supply water into the water supply container 1320, the supplied amount of water is discharged through the plurality of outlet holes 1322a and uniformly drops toward the coffee grounds, and the water in the water supply container 1320 is always maintained at a predetermined amount. The amount of water falling toward the coffee powder may be adjusted by the adjusting valve unit 1330.

According to the water supply apparatus of this embodiment, even if a large amount of water is filled in the reservoir 1310 by additionally providing the second air passage opening/closing means, the amount of water to be filled in the air passage 1340 through the water inlet 1341 is limited, and thus, when the air passage opening/closing means 1350 is opened, a vacuum force can be rapidly generated in the water supply container 1320.

Fig. 14a and 14b are views showing the structure of a water supply device for coffee extraction according to still another embodiment of the present invention. Fig. 15 is a view showing the coffee extraction water supply device shown in fig. 14a in an exploded state. Fig. 16 is a view showing an assembled state of the valve unit in fig. 15.

The water supply apparatus of the present embodiment includes a water tank 1410, a water supply container 1420, a valve unit 1430, an air passage 1440, and an air passage opening/closing device.

Reservoir 1410 and water supply container 1420 have the same configurations as reservoir 1110 and water supply container 1120 shown in fig. 10.

In the present embodiment, the valve unit 1430 is provided in the air passage 1440, and the blocking part 1435 and the second blocking part 1434 for opening and closing the air passage 1440 are provided in the valve unit 1430, so that the valve unit 1430 functions as an air passage opening and closing device. Thus, the adjustment rod 1433 of the valve unit 1430 and the adjustment rod of the air passage opening and closing means may be formed of an integrated adjustment rod.

The air passage 1440 may be opened and closed by the operation of the integrated adjustment lever (or the adjustment lever 1433) to generate a vacuum force inside the water supply container 1420, and then the integrated adjustment lever may be operated to adjust the amount of water supplied to the water supply container 1420 after the vacuum force is generated inside the water supply container 1420.

The air passage 1440 is communicated with the outside so that air inside the water supply container 1420 can be discharged to form a vacuum force inside the water supply container 1420. Air passage 1440 extends from water supply container 1420 into water reservoir 1410.

The air passage 1440 includes: a water inlet 1441 in fluid communication with reservoir 1410; and an inflow port 1442 in fluid communication with the water supply container 1420. The flow path formed by water inlet 1441 and water inlet 1442 is a flow path connecting water storage tank 1410 and water supply tank 1420.

The valve unit 1430 opens and closes the flow path to adjust the amount of water supplied to the water supply container 1420. The valve unit 1430 may include: a drum member 1431 extending from the water supply container 1420 to the inside of the water reservoir 1410; an insertion member 1432 inserted into the barrel member 1431; and an adjusting lever 1433 on the upper portion of the insertion member 1432.

The barrel part 1431 includes: a valve inlet 1431a in fluid communication with reservoir 1410; and a valve flow inlet 1431b in fluid communication with the water supply container 1420. A block 1435 and a second block 1434 can be inserted into barrel component 1431.

A threaded portion 1432a may be formed on an outer side surface of the insertion member 1432 so as to be threadably coupled to an inner side surface of the barrel member 1431. The amount of water supplied from the reservoir 1410 to the water supply container 1420 through the valve inlet 1431b can be adjusted by rotating the adjustment lever 1433.

The air passage opening/closing device can open/close the air passage 1440 and can open/close the inlet 1442. In the present embodiment, the valve unit 1430 also functions as an air passage opening/closing device.

Referring to fig. 14a, a stepped portion 1443 having a reduced cross-section may be formed at an upper portion of the water inlet 1441 in the air passage 1440, and a second blocking portion 1434 for opening and closing an opening formed through the stepped portion 1443 may be attached to the cylindrical member 1431 of the valve unit 1430. The second blocking part 1434 may be a second air passage opening and closing device capable of opening and closing the air passage 1440 at the upper portion of the water inlet 1441.

Since the air passage 1440 above the inlet 1442 and the inlet 1441 can be opened and closed at the same time by the adjustment lever 1433 of the adjustment valve unit 1430, the valve unit 1430 also functions as a second air passage opening and closing device.

The blocking portion 1435 is pressed by the elastic member 1416, and the blocking portion 1435 and the second blocking portion 1434 are urged in a direction of opening and closing the opening formed through the inflow port 1442 and the stepped portion 1443.

When the air passage opening/closing means and the second air passage opening/closing means are opened and closed by the elastic member 1416, the step 1443 provided in the air passage 1440 is blocked by the second blocking portion 1434. Accordingly, even if water is filled up to the upper end of reservoir 1410, only a small amount of water is filled up to step 1443 in air passage 1440.

As shown in fig. 14b, when the adjustment lever 1433 is operated downward against the elastic force of the elastic member 1416, the blocking part 1435 and the second blocking part 1434 attached to the drum member 1431 move downward and completely open the air passage 1440. When the air passage 1440 is opened, water flows into the water supply container 1420, and air in the water supply container 1420 flows smoothly upward through the air passage 1440, so that vacuum force can be rapidly generated in the water supply container 1420. When the pressure applied to the adjustment lever 1433 is released, the blocking portion 1435 and the second blocking portion 1434 are raised by the elastic member 1416, and the inlet port 1442 and the air passage 1440 are closed.

Next, when the adjustment lever 1433 of the valve unit 1430 is rotated to open the valve inlet 1431a and supply water to the water supply container 1420, the supplied amount of water is discharged through the plurality of water outlet holes 1422a and uniformly drops down to the coffee grounds, and the water inside the water supply container 1420 is always maintained at a predetermined amount. The amount of water dropped to the coffee powder may be adjusted by adjusting the valve unit 1430.

According to the water supply apparatus of the present embodiment, the valve unit 1430 and the air passage opening and closing means are constituted by one integrated adjusting lever, so that the convenience of the operation of the user can be increased, the installation space can be reduced and the manufacturing cost can be saved compared to the case where the valve unit 1430 and the air passage opening and closing means are separately provided.

Further, by additionally providing the second air passage opening/closing means in the valve unit 1430, even when a large amount of water is filled in the water storage tank 1410, the water filled in the air passage 1440 is restricted by the water inlet 1441, and when the air passage 1440 is opened by the valve unit 1430, a vacuum force can be rapidly generated in the water supply container 1420.

The water supply apparatus of this embodiment includes a reservoir 1510, a water supply container 1520, a valve unit 1530, and an air path 1540.

Reservoir 1510 and water supply container 1520 have the same structure as reservoir 1110 and water supply container 1120 shown in fig. 10.

The valve unit 1530 opens and closes the flow path to adjust the amount of water supplied to the water supply container 1520. The valve unit 1530 may be opened and closed at a water inlet 1511 provided at one side of the reservoir 1510 and in fluid communication with the reservoir 1510 and a water inlet 1512 in fluid communication with the water supply container 1520. The flow path formed by the water inlet 1511 and the inflow port 1512 is a flow path for connecting the reservoir 1510 and the water supply container 1520.

The water supply container 1520 is connected to an air path 1540, and the air path 1540 communicates with the outside.

The valve unit 1530 communicates with the air passage 1540, and the valve unit 1530 functions as an air passage opening/closing device capable of opening/closing the air passage 1540. A predetermined section of the valve unit 1530 opens only the flow path, and when the predetermined section or more is operated, the flow path and the air path 1540 are opened together.

The valve unit 1530 may include a blocking portion 1532 for opening and closing the flow path and a reduced cross-section portion 1531 behind such a blocking portion 1532.

An adjustment lever 1533 is formed at an end of the valve unit 1530, and the amount of water supplied from the reservoir 1510 to the water supply container 1520 is adjusted by the water inlet 1511 by rotating or linearly moving the adjustment lever 1533. A screw portion may be formed at the valve unit 1530, and movement is finely adjusted by rotation of the screw portion.

Referring to fig. 17a, the valve unit 1530 closes both the water inlet 1511 and the air path 1540.

As shown in fig. 17b, when the blocking portion 1532 and the reduced cross-section portion 1531 move backward to open the flow path and the air path 1540 at the same time by the valve unit 1530, an appropriate amount of water is contained in the water supply container 1520 through the inflow port 1512, and the air in the water supply container 1520 can be discharged to the outside through the air path 1540.

Next, after the valve unit 1530 is moved forward to discharge the air inside the water supply container 1520 to the outside, if the air does not flow into the water supply container 1520 any more, a vacuum force can be generated inside the water supply container 1520.

Next, when the blocking portion 1532 of the valve unit 1530 is appropriately moved backward to open the flow path and close the air path 1540 to supply water to the water supply container 1520, the supplied amount of water is discharged through the plurality of water outlet holes 1522a and uniformly drops toward the coffee grounds, and the amount of water inside the water supply container 1520 is always maintained constant. The amount of water falling toward the coffee powder can be adjusted by adjusting the valve unit 1530.

In the water supply apparatus of the present embodiment, the valve unit 1530 has the function of the air passage opening/closing means, so that the operation is convenient, and the installation space can be reduced to save the manufacturing cost.

As described in the above embodiments, the air path and the air path opening/closing means may be implemented in various forms in the present invention as long as the vacuum force can be formed in the water supply container, and are not limited to the embodiments shown in the drawings.

As shown in the above embodiments, the valve unit, the air path, and the air path opening and closing means may be implemented in various forms as long as the vacuum force can be formed in the water supply container in the present invention, and are not limited to the embodiments shown in the drawings.

The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications or variations can be made to the present invention without departing from the technical spirit of the present invention.

Claims

1. A water supply device for coffee extraction is characterized in that,

the method comprises the following steps:

the flow path is connected with the water storage tank;

a water supply container connected to the flow path and including an accommodating space capable of storing water and a water distribution member for discharging the water stored in the accommodating space to a lower portion through a plurality of water outlet holes; and

a valve unit for adjusting the amount of water supplied to the water supply container by opening and closing the flow path,

an air passage communicating with the outside is formed in the water supply container,

the water supply device for coffee extraction further comprises an air passage opening/closing device capable of opening/closing the air passage,

the vacuum force may be generated in the water supply container by opening the valve unit to open the air passage while the water supply container is filled with water, and closing the air passage by the air passage opening and closing device after the water supply container is filled with a predetermined amount of water.

2. A water supply device for coffee extraction is characterized in that,

the method comprises the following steps:

the flow path is connected with the water storage tank;

the flow path between the valve unit and the water supply container is communicated with an air passage communicated with the outside,

3. A water supply device for coffee extraction is characterized in that,

the method comprises the following steps:

the flow path is connected with the water storage tank;

the valve unit is connected to an air passage communicating with the outside,

4. The water supply device for extracting coffee as set forth in any one of claims 1 to 3, wherein a plurality of projections are formed to project downward from a bottom surface of the water distribution member, and the water outlet holes are formed to penetrate the plurality of projections, respectively.

5. The water supply apparatus for extracting coffee as set forth in any one of claims 1 to 3, further comprising a cover member capable of closing the plurality of water outlet holes of the water dispensing member.

6. The water supply device for coffee extraction according to any one of claims 1 to 3, further comprising:

a temperature sensor for measuring the temperature of the water contained in the water supply container; and

and a temperature display unit for displaying the temperature measured by the temperature sensor.

7. A water supply device for coffee extraction is characterized in that,

the method comprises the following steps:

a water storage tank;

a water supply container connected to the water storage tank through a flow path, and including an accommodating space capable of storing water and a water distribution member for discharging the water stored in the accommodating space to a lower portion through a plurality of water outlet holes; and

the water storage tank is positioned above the water supply container, an air passage which is communicated from the water supply container to the interior of the water storage tank and is communicated with the exterior is formed on the water supply container,

8. The water supply apparatus for coffee extraction according to claim 7,

a water inlet formed in the air passage provided to penetrate the inside of the reservoir tank, through which water in the reservoir tank can flow into the inside of the air passage,

the water flowing into the air passage can flow into the water supply container through the inflow port,

the air passage opening/closing device can open/close the inflow port,

when the inflow port is opened by the air passage opening/closing means, the water flowing into the air passage flows into the water supply container and the air in the water supply container can be discharged through the air passage,

when the inflow port is closed by the air passage opening/closing means, the inflow of water through the air passage is blocked, and the vacuum force is generated in the water supply container by closing the air passage.

9. The water supply device for extracting coffee as set forth in claim 8, wherein a second air passage opening/closing device capable of opening/closing the air passage is additionally provided in the air passage above the water inlet.

10. The water supply device for coffee extraction according to claim 8,

the valve unit is disposed in the air passage,

the adjusting rod of the valve unit and the adjusting rod of the air passage opening/closing device are formed by an integrated adjusting rod,

the air passage can be opened and closed by the operation of the integrated adjusting lever to form a vacuum force in the water supply container,

the amount of water supplied to the water supply tank can be adjusted by operating the collective adjustment lever after the vacuum force is generated in the water supply tank.

11. A water supply device for coffee extraction is characterized in that,

the method comprises the following steps:

a water storage tank;

the valve unit is communicated with an air flow path which is communicated with the outside,

the valve unit functions as an air passage opening/closing device capable of opening/closing the air passage,

the vacuum force may be generated in the water supply container by opening the valve unit to open the air passage while the water supply container is filled with water, and closing the air passage by the valve unit after the water supply container is filled with a predetermined amount of water.