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KR-20260063592-A - Espresso machine with residual water discharge and residual moisture removal functions

KR20260063592AKR 20260063592 AKR20260063592 AKR 20260063592AKR-20260063592-A

Abstract

The present invention relates to an espresso machine having a residual water discharge function, and more specifically, to an espresso machine that efficiently discharges residual water through a drain pipe extending to the outside of a cylindrical pressure vessel through the upper end of the piston, with an opening located on one side of the lower end of the piston, by utilizing pressure formed by a piston moving longitudinally in contact with the inner surface of a cylindrical pressure vessel and suction force generated by operating a pump, wherein the water remaining after extracting espresso (residual water) is removed so that it does not remain in the brew chamber or fall downward into the portafilter. Furthermore, the present invention relates to an espresso machine having a residual moisture removal function, and more specifically, to an espresso machine that efficiently removes residual moisture by utilizing a heater positioned in contact with the outer surface of a cylindrical pressure vessel and a piston that moves longitudinally in contact with the inner surface of the cylindrical pressure vessel. The invention is characterized by removing residual moisture remaining on the surface of the cylindrical pressure vessel or the piston, etc., even after extracting espresso and discharging residual water, thereby extending the lifespan of the machine and improving hygiene.

Inventors

  • 이상민
  • 최남호

Assignees

  • 이상민

Dates

Publication Date
20260507
Application Date
20241030

Claims (7)

  1. Cylindrical pressure vessel (100); A piston (200) positioned in contact with the inner surface of the above-mentioned cylindrical pressure vessel and coupled with a driving device (210) to move in the longitudinal direction; A group head (300) coupled to the bottom of the above-mentioned cylindrical pressure vessel; A drain pipe (400) having one side opening (410) located on the lower end surface (210) of the piston and extending to the outside of a cylindrical internal pressure vessel through the upper end (220) of the piston; A drain valve (500) connected to the middle part of the drain pipe to control the flow of fluid through the drain pipe; An espresso machine comprising a control unit (600) that controls the operation of the above-mentioned drive unit and drain valve, The above control unit With the drain valve closed, control the drive mechanism to move the piston toward the group head to extract a predetermined amount of espresso, and then An espresso machine characterized by opening a drain valve to utilize the pressure difference between the inside and outside of a cylindrical pressure vessel to discharge residual water existing between the lower face of the piston and the group head through a drain pipe.
  2. In paragraph 1, The above control unit With the drain valve closed, control the drive mechanism to move the piston toward the group head to extract a predetermined amount of espresso, and then An espresso machine characterized by controlling a drive unit while the drain valve is open to further move the piston toward the group head, thereby utilizing the pressure difference between the inside and outside of a cylindrical pressure vessel to discharge residual water existing between the lower end of the piston and the group head through a drain pipe.
  3. In paragraph 1, It further includes a pump (700) coupled to the end of the drain pipe and sucking in residual water existing between the lower face of the piston and the group head through the drain pipe; The above control unit Further controlling the operation of the above pump, With the drain valve closed, control the drive mechanism to move the piston toward the group head to extract a predetermined amount of espresso, and then An espresso machine characterized by opening a drain valve and driving a pump to discharge residual water existing between the lower face of the piston and the group head through a drain pipe.
  4. In paragraph 2, It further includes a pump (700) coupled to the end of the drain pipe and sucking in residual water existing between the lower face of the piston and the group head through the drain pipe; The above control unit Further controlling the operation of the above pump, With the drain valve closed, control the drive mechanism to move the piston toward the group head to extract a predetermined amount of espresso, and then An espresso machine characterized by controlling a drive unit while the drain valve is open to further move the piston toward the group head and driving a pump to discharge residual water existing between the lower surface of the piston and the group head through a drain pipe.
  5. In any one of paragraphs 1 through 4, The above-mentioned cylindrical pressure vessel has a thermal conductivity of 16 W/(m·K) or higher, and It further includes a heater (800) positioned in contact with the outer surface of a cylindrical internal pressure vessel (100). The above control unit (700) is Additional control of the heater's operation, With the drain valve closed, control the drive mechanism to move the piston toward the group head to extract a predetermined amount of espresso, and then An espresso machine characterized by removing residual moisture from the inner surface of a cylindrical pressure vessel by heating a heater with the drain valve open.
  6. In paragraph 5, The above-mentioned cylindrical pressure vessel has a thermal conductivity of 16 W/(m·K) or higher, and It further includes a heater (800) positioned in contact with the outer surface of a cylindrical internal pressure vessel (100). The above control unit (700) is Additional control of the heater's operation, With the drain valve closed, control the drive mechanism to move the piston toward the group head to extract a predetermined amount of espresso, and then An espresso machine characterized by removing residual moisture from the inner surface of a cylindrical pressure vessel by controlling a drive unit with the drain valve open to move a piston and heat a heater.
  7. In any one of paragraphs 1 through 4 and 6, The above piston is configured to include a rod portion (230) that is coupled to a driving device to receive driving force, a cylindrical can portion (240) that has an outer diameter equal to the inner diameter of a cylindrical internal pressure vessel and moves in conjunction with the rod portion, and a ring portion (250) that maintains airtightness between the cylindrical internal pressure vessel and the cylindrical can portion. Combined to the bottom surface of the above can part When the internal pressure of a cylindrical pressure vessel increases due to the movement of the piston, the flow of fluid penetrating the can is blocked, and An espresso machine characterized by additionally including a check valve (900) that allows fluid flow through the can portion when the internal pressure of the cylindrical internal pressure vessel decreases due to the movement of the piston.

Description

Espresso machine with residual water discharge and residual moisture removal functions The present invention relates to an espresso machine having a residual water discharge function, and more specifically, to an espresso machine that efficiently discharges residual water through a drain pipe extending to the outside of a cylindrical pressure vessel through the upper end of the piston, with an opening located on one side of the lower end of the piston, by utilizing pressure formed by a piston moving longitudinally in contact with the inner surface of a cylindrical pressure vessel and suction force generated by operating a pump, wherein the water remaining after extracting espresso (residual water) is removed so that it does not remain in the brew chamber or fall downward into the portafilter. Furthermore, the present invention relates to an espresso machine having a residual moisture removal function, and more specifically, to an espresso machine that efficiently removes residual moisture by utilizing a heater positioned in contact with the outer surface of a cylindrical pressure vessel and a piston that moves longitudinally in contact with the inner surface of the cylindrical pressure vessel. The invention is characterized by removing residual moisture remaining on the surface of the cylindrical pressure vessel or the piston, etc., even after extracting espresso and discharging residual water, thereby extending the lifespan of the machine and improving hygiene. The espresso machine, a representative coffee beverage manufacturing device, is known to have been first produced in 1822 by the Frenchman Louis Bernard Rabaut. In 1855, another Frenchman, Edouard Loysel de Santais, unveiled the Cafe Express Machine, which could produce 2,000 cups of coffee beverages per hour. In 1884, the Italian Angelo Moriondo obtained the first patent (No. 33/256) for an espresso machine with an espresso machine unveiled at the Turin Exhibition. In 1991, the Italian Luigi Bezzera developed a new steam-pressure espresso machine by improving on existing products and obtained a patent (No. 153/94, 61707) in 1992. In 1993, the Hungarian-Italian Francesco Illy invented the first automatic coffee machine. The brew chamber of an espresso machine is most heavily exposed to high-temperature water and steam, and it is inevitable that it will be exposed to various mineral components (calcium, magnesium, etc.) contained in the water or steam, as well as coffee grounds and coffee oils. Residual water and various foreign substances remaining in the brew chamber after espresso extraction can cause hygiene issues such as the proliferation of bacteria and mold, as well as equipment problems such as damage to rubber gaskets and rust formation, and can also be factors that degrade the quality of the espresso. To solve these problems, the power to the espresso machine is turned off, the group head is detached, and water and contaminants are manually removed using a cloth or brush. Additionally, a backflushing function is used in conjunction to remove grounds and oils. The residual water remaining after espresso extraction contains various impurities and not only contaminates the inside of the brew chamber but is also discharged downward through the group head due to gravity, negatively affecting not only the appearance but also hygiene. Figure 1 is a conceptual diagram of an espresso machine equipped with residual water discharge and residual moisture removal functions. The present invention will be described in detail as follows with reference to the attached drawings, FIG. 1, claims, etc. The present invention relates to an espresso machine comprising: a cylindrical pressure vessel (100); a piston (200) positioned in contact with the inner surface of the cylindrical pressure vessel and coupled to a driving device (210) to move in the longitudinal direction; a group head (300) coupled to the lower end of the cylindrical pressure vessel; a drain pipe (400) having one side opening (410) located at the lower end surface (210) of the piston and extending to the outside of the cylindrical pressure vessel through the upper end (220) of the piston; a drain valve (500) coupled to the middle part of the drain pipe to control the flow of fluid through the drain pipe; and a control unit (600) that controls the operation of the driving device and the drain valve, wherein the control unit controls the driving device while the drain valve is closed to move the piston toward the group head to extract a predetermined amount of espresso, and then opens the drain valve to discharge residual water existing between the lower end surface of the piston and the group head through the drain pipe using the pressure difference between the inside and outside of the cylindrical pressure vessel. It is about espresso machines. In addition, the present invention relates to an espresso machine characterized by a control unit controlling a driving device while the drain valve is