US20180140130A1 - Coffee machine and working method therefor - Google Patents

Coffee machine and working method therefor Download PDF

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Publication number
US20180140130A1
US20180140130A1 US15/570,385 US201615570385A US2018140130A1 US 20180140130 A1 US20180140130 A1 US 20180140130A1 US 201615570385 A US201615570385 A US 201615570385A US 2018140130 A1 US2018140130 A1 US 2018140130A1
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US
United States
Prior art keywords
flow guiding
guiding channel
liquid
channel
brewing chamber
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Abandoned
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US15/570,385
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English (en)
Inventor
Linbin ZHOU
Xuebin Wang
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Conwide Technology Co Ltd
Conwide Technology Ltd
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Conwide Technology Ltd
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Application filed by Conwide Technology Ltd filed Critical Conwide Technology Ltd
Assigned to CONWIDE TECHNOLOGY CO., LTD. reassignment CONWIDE TECHNOLOGY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WANG, XUEBIN, ZHOU, LINBIN
Publication of US20180140130A1 publication Critical patent/US20180140130A1/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/4403—Constructional details
    • A47J31/4407—Lids, covers or knobs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/58—Safety devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/42—Beverage-making apparatus with incorporated grinding or roasting means for coffee
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
    • A23F5/00—Coffee; Coffee substitutes; Preparations thereof
    • A23F5/08—Methods of grinding coffee
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
    • A23F5/00—Coffee; Coffee substitutes; Preparations thereof
    • A23F5/24—Extraction of coffee; Coffee extracts; Making instant coffee
    • A23F5/26—Extraction of water-soluble constituents
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/06—Filters or strainers for coffee or tea makers ; Holders therefor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/24—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/4403—Constructional details
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/46—Dispensing spouts, pumps, drain valves or like liquid transporting devices

Definitions

  • the present invention relates to the technical field of beverage preparation equipment and in particular, to a coffee machine for brewing coffee and a working method therefor.
  • a first lid body of a conventional coffee machine for covering a main body opening cannot be completely detached from a main body of a conventional coffee machine.
  • Such first lid body is usually a flip lid, and one end of flip lid is fixed onto the main body of the coffee machine.
  • the coffee machine usually also has a water tank, heating device, brewing chamber and so on.
  • the brewing chamber usually has a brewing chamber opening at its top such that coffee powder is placed into the brewing chamber for brewing coffee through the brewing chamber opening.
  • the brewing chamber of some coffee machines is provided with a grinding assembly. Coffee beans and other coffee particles may be placed into the brewing chamber through the brewing chamber opening.
  • the brewing chamber opening is corresponding to the main body opening.
  • a flow guiding device usually comprises a guiding pipe.
  • the first lid body is usually used as a part of the flow guiding device and is fixedly connected to the guiding pipe. Liquid heated by the heating device flows from the heating device into the guiding pipe, and flows towards the brewing chamber opening through the first lid body and then enters into the brewing chamber through the brewing chamber opening. Since the first lid body is fixedly connected to the guiding pipe, at least one end of the first lid body is fixed and cannot be completely detached from the main body, which causes the inconvenience in the cleaning of the coffee machine, in particular the cleaning of the first lid body.
  • a second lid body of an existing coffee machine usually is covered on the brewing chamber by virtue of the gravity. There is a gap between the second lid body and the brewing chamber, which causes that small coffee particles in the brewing chamber are escaped with steam from the gap when brewing coffee.
  • Some coffee machines have a grinding and filtering device respectively, wherein the grinding and filtering device comprises the brewing chamber and the grinding assembly which are mentioned above.
  • a filter is provided on the side portion of the brewing chamber in such coffee machines. Coffee particles are ground, brewed and filtered in the brewing chamber.
  • the grinding and filtering device of such coffee machines has poor filtering effect. Particles in the coffee liquid are deposited at a bottom of the brewing chamber due to gravity, which causes a lower concentration in liquid flowed out from the filter at the side portion of the brewing chamber.
  • the liquid in the bottom portion of the brewing chamber is mixed with the deposited particles at the bottom portion, and can hardly be discharged from the filter, a part of liquid and coffee particles is remained at the bottom of the brewing chamber, thereby causing waste.
  • one object of the present invention to provide a coffee machine with a flow guiding device which may guide liquid into a brewing chamber for brewing coffee and allows the complete detachment between a first lid body and a main body, thereby facilitate the cleaning of the first lid body.
  • a coffee machine which comprises a main body, a first lid body, a brewing chamber, a water tank and a heating device, the brewing chamber, the water tank and the heating device being provided in the main body, the main body being provided with a main body opening, wherein the first lid body is used for covering the main body opening.
  • the coffee machine further comprises a flow guiding device, wherein the flow guiding device comprises a first flow guiding channel, a first end of the first flow guiding channel being connected to the heating device, the brewing chamber being provided with a brewing chamber through hole corresponding to a second end of the first flow guiding channel, the second end of the first flow guiding channel being inserted into the brewing chamber through the brewing chamber through hole; or wherein the flow guiding device comprises the first flow guiding channel and a second flow guiding channel detachably connected to the first flow guiding channel, the first end of the first flow guiding channel being connected to the heating device, the first lid body being provided with the second flow guiding channel which has a water inlet and a water outlet, the water outlet being located at a position corresponding to a brewing chamber opening such that liquid is supplied to the brewing chamber.
  • the flow guiding device comprises a first flow guiding channel, a first end of the first flow guiding channel being connected to the heating device, the brewing chamber being provided with a brewing
  • the second end of the first flow guiding channel is directly inserted into the brewing chamber, and heated liquid may be introduced by the flow guide device from the heating device into the brewing chamber for brewing coffee. Liquid in the heating device expands and generates a pressure after being heated, such that liquid enters into the first flow guiding channel and flows from the first end of the first flow guiding channel into the second end of the first flow guiding channel and thus enters into the brewing chamber.
  • the first lid body is not used for flow guidance, and it is not necessary that the first lid body is connected to the first flow guiding channel, thereby allowing the first lid body to be completely detached from the main body to facilitate the cleaning of the first lid body.
  • the flow guiding device comprises a first flow guiding channel and a second flow guiding channel detachably connected to the first flow guiding channel.
  • the first lid body provided with the second flow guiding channel is allowed to be detached from the first flow guiding channel since the first flow guiding channel is allowed to be detached from first flow guiding channel.
  • the first lid body provided with the second flow guiding channel is allowed to be detached from the main body to facilitate the cleaning of the first lid body.
  • the second flow guiding channel is an individual member provided on the first lid body.
  • the second flow guiding channel is partially or totally formed by the first lid body.
  • a cavity which is provided with the water inlet and the water outlet is provided inside the first lid body.
  • the water inlet is fluidly communicated to the water outlet so as to form the second flow guiding channel.
  • the second end of the first flow guiding channel is detachably connected to the water inlet.
  • the water outlet is located at a position corresponding to the brewing chamber opening such that liquid is supplied to the brewing chamber.
  • the first lid body is detachably engaged with the main body, and the first lid body comprises a first upper lid body and a first lower lid body.
  • the first upper lid body is engaged with the first lower lid body so as to form the cavity.
  • a cavity channel is provided inside the cavity.
  • the water inlet and the water outlet are fluidly communicated to the cavity channel respectively so as to form the second flow guiding channel.
  • liquid which flowed out of the first flow guiding channel directly enters into the cavity channel and then flows out of the water inlet, and finally enters into the brewing chamber.
  • a cavity is provided inside the first lid body.
  • the second flow guiding channel comprises a first pipe portion provided with the water inlet.
  • the cavity is provided with the water outlet.
  • the water inlet is fluidly communicated to the water outlet so as to form the second flow guiding channel.
  • the second end of the first flow guiding channel is detachably connected to the water inlet of the first pipe portion.
  • the water outlet of the cavity is located at a position corresponding to the brewing chamber opening such that liquid is supplied to the brewing chamber.
  • the first lid body is detachably engaged with the main body, and the first lid body comprises a first upper lid body and a first lower lid body.
  • the first upper lid body is engaged with the first lower lid body so as to form the cavity.
  • a cavity channel is provided inside the cavity.
  • the water inlet and the water outlet are fluidly communicated to the cavity channel respectively so as to form the second flow guiding channel.
  • liquid which flowed out from the first flow guiding channel enters into the first pipe portion and the cavity channel successively and then flows through the water inlet of the cavity into the brewing chamber.
  • a cavity is provided inside the first lid body, the second flow guiding channel comprises a first pipe portion provided with the water inlet and a second pipe portion provided with the water outlet.
  • the water inlet and the water outlet are fluidly communicated to the cavity respectively so as to form the second flow guiding channel.
  • the second end of the first flow guiding channel is detachably connected to the water inlet of the first pipe portion.
  • the water outlet of the second pipe portion is located at a position corresponding to the brewing chamber opening such that liquid is supplied to the brewing chamber.
  • liquid which flowed out from the first flow guiding channel enters into the first pipe portion, the cavity and the second pipe portion successively and then flows from the second pipe portion into the brewing chamber.
  • the first lid body is detachably engaged with the main body, and the first lid body comprises a first upper lid body and a first lower lid body.
  • the first upper lid body is engaged with the first lower lid body so as to form the cavity.
  • a cavity channel is provided inside the cavity.
  • the water inlet and the water outlet are fluidly communicated to the cavity channel respectively so as to form the second flow guiding channel.
  • liquid which flowed out from the first flow guiding channel enters into the first pipe portion, the cavity channel and the second pipe portion successively and then flows from the second pipe portion into the brewing chamber.
  • the water inlet is detachably connected to the second end of the first flow guiding channel inside the main body
  • the coffee machine further comprises a blocking device provided at a position corresponding to the second end of the first flow guiding channel, such that the blocking device is capable of being deformed to prevent liquid from being ejected out of the main body opening when the second flow guiding channel is detached from the first flow guiding channel. If the second flow guiding channel is detached from the first flow guiding channel during the supplying process of heated water from the heating device into the flow guiding device, heated water would be ejected out of the main body opening, which may caused safety accident. In order to eliminate this safety hazard, it is necessary that the blocking device is provided.
  • the blocking device is an elastic assembly.
  • a first end of the elastic assembly is elastically provided at a position corresponding to the second end of the first flow guiding channel.
  • a second end of the elastic assembly is capable of being rotated around the first end of the elastic assembly so as to form the elastic assembly.
  • the elastic assembly comprises a movable baffle.
  • a first end of the baffle is arranged to be rotatably connected to the main body.
  • a spring is provided between the baffle and the main body.
  • a first end of the baffle is elastically provided at a position corresponding to the second end of the first flow guiding channel.
  • a second end of the baffle is capable of being elastically rotated around the first end of the baffle such that the spring is deformed.
  • the baffle When the first pipe portion of the second flow guiding channel is connected to the second end of the first flow guiding channel, the baffle is pushed by the first pipe portion such that the second end of the baffle is moved from a first position (horizontal position) around the first end of the baffle to a second position (vertical position).
  • a first position horizontal position
  • a second position vertical position
  • an elastic force is provided by the spring such that the second end of the baffle is moved from the second position (vertical position) around the first end of the baffle to the first position (horizontal position), so as to block liquid which flowed out of the second end of the first flow guiding channel.
  • the blocking device is an elastic single piece.
  • a middle portion of the elastic single piece is provided with at least one cutout.
  • the elastic single piece is capable of being deformed by extrusion such that the cutout is opened.
  • the elastic single piece is extruded by the first pipe portion such that the cutout is opened and that the first pipe portion can be connected to the first flow guiding channel through the elastic single piece.
  • the first pipe portion of the second flow guiding channel is detached from the second end of the first flow guiding channel, the first pipe portion is pulled out from the cutout and the cutout is closed, so as to prevent liquid from being ejected out of the main body.
  • the middle portion of the elastic single piece is provided with at least two cutouts which cross each other.
  • the elastic single piece is capable of being deformed by extrusion such that the cutout is opened.
  • a backflow channel is provided inside the main body.
  • the backflow channel is communicated to an upper portion of the water tank and the first flow guiding channel respectively, such that at least a part of liquid blocked by the blocking device enters into the backflow channel and flows into the water tank.
  • the second end of the first flow guiding channel having a closed top is disposed over the first pipe portion of the second flow guiding channel.
  • a side wall of the second end of the first flow guiding channel is provided with a side wall outlet.
  • a gap is provided between the side wall outlet and the first pipe portion, such that liquid flows from the side wall outlet into the second flow guiding channel.
  • a backflow channel is provided inside the main body.
  • the backflow channel is communicated to an upper portion of the water tank and the first flow guiding channel respectively, such that at least a part of liquid which flowed out of the side wall outlet enters into the backflow channel and flows into the water tank.
  • a fixing element for fixing the first lid body onto the main body is provided on the first lid body and/or the main body.
  • a second lid body for covering the brewing chamber opening is provided on a lower side of the first lid body.
  • An elastic member being provided between the first lid body and the second lid body, such that a relative seal is formed between the second lid body and the brewing chamber when the first lid body is fixed onto the main body.
  • the spring When the first lid body is fixed onto the main body, the spring is compressed to provide an elastic force such that the brewing chamber is tightly pressed by the second lid body to form a relative seal between the second lid body and the brewing chamber, so as to prevent the coffee particles in the brewing chamber escaping with a steam from the gap between the second lid body and the brewing chamber.
  • the second lid body is provided with a second lid body through hole.
  • the second lid body through hole is provided at a position corresponding to the water outlet of the second flow guiding channel such that the liquid flows into the main body from the second flow guiding channel through the second lid body through hole.
  • the first lid body is provided with one or more first exhaust holes.
  • the second lid body is provided with one or more second exhaust holes.
  • the first exhaust holes are communicated to the second exhaust holes.
  • heated liquid enters the brewing chamber for brewing the coffee, a steam is generated in the brewing chamber.
  • the second exhaust holes help to discharge the steam out of the brewing chamber, and then the steam is discharged out of the main body through the first exhaust holes.
  • the diameter of the second exhaust holes is less than 1 mm to prevent the coffee particles in the brewing chamber from escaping with the steam through the second exhaust holes.
  • the coffee machine further comprises a grinding and filtering device which comprises a chamber for containing liquid and coffee particles, a grinding assembly for grinding coffee particles, a driving mechanism connected to the grinding assembly and for driving the grinding assembly, and a first filter for filtering coffee liquid in the chamber.
  • the chamber is provided with a chamber opening, and at least a part of the grinding assembly is placed in the chamber.
  • the chamber comprises the brewing chamber provided with the brewing chamber opening, and a liquid channel communicated with the brewing chamber is provided on a bottom of the brewing chamber.
  • the first filter is partially or totally located on the bottom of the brewing chamber.
  • the liquid channel is located on a lower side of the first filter such that coffee liquid in the brewing chamber flows through the first filter before entering into the liquid channel.
  • Coffee liquid is easier to be filtered by the first filter partially or totally located on the bottom of the brewing chamber, due to the gravity. This helps to discharge coffee liquid out and to avoid coffee liquid from remaining in the brewing chamber.
  • the flow of the coffee liquid towards the bottom of the brewing chamber is formed in the chamber due to the gravity, such that coffee liquid is easier to be discharged out of the first filter on the bottom of the brewing chamber, which contributes to the rapid dissolution of the coffee particles located in the brewing chamber, so as to form a coffee liquid having high concentration.
  • the grinding assembly comprises a blade and a blade shaft.
  • the blade shaft is inserted through the bottom of the brewing chamber.
  • One end of the blade shaft located inside the brewing chamber is connected to the blade.
  • Another end of the blade shaft located outside the brewing chamber is detachably connected to the driving mechanism such that the blade is driven to be rotated by the driving mechanism via blade shaft to grind coffee particles in the brewing chamber.
  • Coffee particles can be ground by the rotated blade, such that coffee particles are changed from a first size into to a second size, wherein the second size is smaller than the first size.
  • Liquid enters into the brewing chamber and is mixed with the ground coffee particles (second size coffee particles) to form coffee liquid.
  • coffee liquid can be stirred by the rotated blade to accelerate dissolution of coffee particles.
  • a liquid channel valve is provided at a bottom of the liquid channel to control the discharge of coffee liquid from the liquid channel.
  • the liquid channel valve can be opened such that coffee liquid flows out of a collecting chamber for drinking.
  • the liquid channel valve can be closed such that coffee liquid is stopped from flowing out of the coffee machine to avoid the wasting of coffee liquid.
  • the grinding assembly further comprises a collecting chamber.
  • the collecting chamber is communicated with the brewing chamber via the liquid channel such that filtered coffee liquid flows into the collecting chamber through the liquid channel.
  • Filtered coffee liquid may be stored in the collecting chamber. Since a certain period of time would be needed for filtering coffee liquid, coffee liquid which flowed out of the brewing chamber earlier may have a lower concentration, and coffee liquid which flowed out of the brewing chamber later may have a higher concentration due to a longer time for dissolution of coffee particles. Coffee liquid having the lower concentration can be mixed with that having the higher concentration in the collecting chamber to obtain coffee liquid having an appropriate concentration.
  • a bottom of the collecting chamber is provided with a collecting chamber valve for controlling the discharge of liquid from the collecting chamber.
  • the collecting chamber valve can be opened such that coffee liquid flows out of the collecting chamber for drinking.
  • the collecting chamber valve can be closed such that coffee liquid is stopped from flowing out of the coffee machine to avoid the wasting of coffee liquid.
  • the collecting chamber is provided with a second filter for filtering the liquid which entered into the collecting chamber.
  • the second filter is arranged such that coffee liquid which entered into collecting chamber flows through the second filter before flowing to the collecting chamber valve.
  • a second filtering of the coffee liquid may be performed by the second filter, so as to further remove a residue from coffee liquid to obtain coffee having a better taste. Since coffee liquid which entered the collecting chamber had been filtered by the first filter, coffee particles in the coffee liquid are smaller and are less likely to be deposited at the bottom. Thus, the second filter may not be provided at the bottom of the collecting chamber.
  • the second filter may be selected to be provided at any position in the collecting chamber coffee where liquid in collecting chamber flows through the second filter before flowing to the collecting chamber valve.
  • a bottom surface of the first filter is higher than an inner bottom surface of the collecting chamber.
  • the collecting chamber and the brewing chamber are arranged side by side. Since the bottom surface of the first filter is higher than the inner bottom surface of the collecting chamber, the height difference between them helps to the flow of liquid through the filter into the collecting chamber.
  • the collecting chamber and the brewing chamber are arranged side by side is described in the present embodiment, it is obvious that liquid can flow easily into collecting chamber through the filter, when the collecting chamber is located at a lower side of the brewing chamber.
  • the collecting chamber may also be provided on the lower side of the brewing chamber.
  • the thickness of the first filter is arranged to be 0.1 mm and 10 mm.
  • the first filter should not be too thin, otherwise it is likely to be damaged during cleaning.
  • it is suitable that the thickness of the first filter is arranged to be between 0.1 mm and 10 mm.
  • the thickness of the first filter is arranged to be between 0.1 mm and 5 mm, and more preferably the thickness of the first filter is arranged to be between 0.1 mm and 3 mm.
  • the thickness of the second filter is arranged to be 0.1 mm and 10 mm.
  • the thickness of the second filter is arranged to be between 0.1 mm and 5 mm, and more preferably the thickness of the second filter is arranged to be between 0.1 mm and 3 mm.
  • Another object of the present invention is to provide a working method for the coffee machine.
  • the working method for the coffee machine comprises the following steps: a. adding liquid into the water tank, and adding coffee powder into the chamber; b. transferring liquid into the heating device from the water tank, heating liquid by the heating device; c. transferring heated liquid into the brewing chamber from the heating device through the flow guiding device, mixing liquid with coffee powders in the brewing chamber to form coffee liquid.
  • step d between step a and step b: covering the main body opening with the first lid body such that first flow guiding channel is connected to the second flow guiding channel; and step c comprises: causing heated liquid to flow from the heating device into the first flow guiding channel and the second flow guiding channel successively and to enter into the brewing chamber from the second flow guiding channel;
  • step c further comprises: blocking liquid from being ejected out of the main body opening by the blocking device when the second flow guiding channel is detached from the first flow guiding channel during the supplying process of water from the heating device into the flow guiding device.
  • step c further comprises: causing at least a part of liquid blocked by the blocking device to enter into the backflow channel and to flow into the water tank.
  • the working method for the coffee machine comprises the following steps: a. adding liquid into the water tank, and adding coffee powder into the chamber; b. transferring liquid into the heating device from the water tank, heating liquid by the heating device; c. transferring heated liquid into the brewing chamber from the heating device through the flow guiding device, mixing liquid with coffee powders in the brewing chamber to form coffee liquid.
  • step d between step a and step b: covering the main body opening with the first lid body such that first flow guiding channel is connected to the second flow guiding channel; and step c comprises: causing heated liquid to flow from the heating device into the first flow guiding channel and the second flow guiding channel successively and to enter into the brewing chamber from the second flow guiding channel;
  • step c further comprises: causing liquid to flow from the side wall outlet into the main body when the second flow guiding channel is detached from the first flow guiding channel during the supplying process of water from the heating device into the flow guiding device.
  • step c further comprises: causing at least a part of liquid which flowed from the side wall outlet to enter into the backflow channel and to flows into the water tank when the second flow guiding channel is detached from the first flow guiding channel during the supplying process of water from the heating device into the flow guiding device.
  • the working method for the coffee machine comprises the following steps: a. adding liquid into the water tank, and adding coffee particles into the grinding and filtering device; b. grinding coffee particles by the grinding and filtering device; c. transferring liquid into the heating device from the water tank, heating liquid by the heating device; d. transferring heated liquid into the grinding and filtering device from the heating device through the flow guiding device, mixing liquid with grinded coffee particles in the grinding and filtering device to form coffee liquid; e. filtering coffee liquid by the grinding and filtering device; f. discharging filtered coffee liquid from the grinding and filtering device.
  • step g between step a and step b: covering the main body opening with the first lid body such that first flow guiding channel is connected to the second flow guiding channel; and step d comprises: causing heated liquid to flow from the heating device into the first flow guiding channel and the second flow guiding channel successively and to enter into the brewing chamber from the second flow guiding channel.
  • step d further comprises:
  • step d further comprises:
  • the working method for the coffee machine comprises the following steps: a. adding liquid into the water tank, and adding coffee particles into the grinding and filtering device; b. grinding coffee particles by the grinding and filtering device; c. transferring liquid into the heating device from the water tank, heating liquid by the heating device; d. transferring heated liquid into the grinding and filtering device from the heating device through the flow guiding device, mixing liquid with grinded coffee particles in the grinding and filtering device to form coffee liquid; e. filtering coffee liquid by the grinding and filtering device; f. discharging filtered coffee liquid from the grinding and filtering device.
  • step g between step a and step b: covering the main body opening with the first lid body such that first flow guiding channel is connected to the second flow guiding channel; and step d comprises: causing heated liquid to flow from the heating device into the first flow guiding channel and the second flow guiding channel successively and to enter into the brewing chamber from the second flow guiding channel.
  • step d further comprises: causing liquid to flow from the side wall outlet into the main body when the second flow guiding channel is detached from the first flow guiding channel during the supplying process of water from the heating device into the flow guiding device.
  • step d further comprises: causing at least a part of liquid which flowed from the side wall outlet to enter into the backflow channel and to flow into the water tank, when the second flow guiding channel is detached from the first flow guiding channel during the supplying process of water from the heating device into the flow guiding device.
  • the coffee machine of the present invention has the flow guiding device which may guide liquid into the brewing chamber and allows the complete detachment between the first lid body and the main body, thereby facilitate the cleaning of the first lid body.
  • the second lid body of the coffee machine of the present invention can be tightly engaged with the brewing chamber of the coffee machine so as to form a relative seal. Thus, coffee particles would not escape from the coffee brewing chamber when the coffee machine is used to brew coffee.
  • the first filter of the coffee machine of the present invention is partially or totally located on the bottom of the brewing chamber such that coffee liquid in the brewing chamber flows through the first filter before entering the liquid channel. Coffee liquid is easier to be filtered by the first filter partially or totally located on the bottom of the brewing chamber, due to the gravity.
  • FIG. 1 is a schematic cross-sectional view of a coffee machine according to embodiment 1 of the present invention.
  • FIG. 2 is a schematic cross-sectional view of the coffee machine according to embodiment 1 of the present invention, which shows that a first lid body of the coffee machine is detached from a main body of the coffee machine.
  • FIG. 3 is a schematic exploded view of a part of the coffee machine according to embodiment 1 of the present invention.
  • FIG. 4 is another schematic exploded view of a part of the coffee machine according to embodiment 1 of the present invention.
  • FIG. 5 is a schematic structural view of part A shown in FIG. 2 .
  • FIG. 6 is a schematic exploded view of the coffee machine according to embodiment 1 of the present invention.
  • FIG. 7 is a perspective view of the coffee machine according to embodiment 1 of the present invention, which shows that a first lid body of the coffee machine is completely detached from the main body of the coffee machine.
  • FIG. 8 is a schematic view of the coffee machine according to embodiment 1 of the present invention, which shows that a first lower lid body of the coffee machine is covering on the main body of the coffee machine.
  • FIG. 9 is another schematic cross-sectional view of the coffee machine according to embodiment 1 of the present invention.
  • FIG. 10 is a schematic cross-sectional view of a part of the coffee machine according to embodiment 3 of the present invention.
  • FIG. 11 is a schematic cross-sectional view of a part of the coffee machine according to embodiment 3 of the present invention.
  • FIG. 12 is a schematic cross-sectional view of an elastic single piece in embodiment 3 of the present invention.
  • FIG. 13 is a schematic cross-sectional view of an elastic single piece in embodiment 4 of the present invention.
  • FIG. 14 is a schematic cross-sectional view showing that a first pipe portion is connected to a second end of a first flow guiding channel in embodiment 5 of the present invention.
  • a coffee machine comprises a main body 1 , a grinding and filtering device, a water tank 2 and a heating device 3 .
  • the grinding and filtering device, the water tank 2 and the heating device 3 is provided inside the main body 1 .
  • a main body opening is provided at a top of the main body 1 .
  • the coffee machine further comprises a first lid body 6 for covering the main body opening.
  • the grinding and filtering device comprises a chamber 41 for containing liquid and coffee particles, a grinding assembly for grinding coffee particles, a motor 43 connected to the grinding assembly and for driving the grinding assembly, and a first filter 44 for filtering coffee liquid in the chamber 41 .
  • the chamber 41 is placed into the main body 1 through the main body opening and is engaged with the main body 1 .
  • the chamber 41 comprises a brewing chamber 412 and a collecting chamber 413 .
  • a liquid channel 411 communicated with the brewing chamber 412 and the collecting chamber 413 is located on a lower side of the brewing chamber 412 .
  • the brewing chamber 412 has a brewing chamber opening 416 at a top of the brewing chamber 412 . Coffee beans that need to be ground can be put into the brewing chamber 412 for grinding through the brewing chamber opening 416 .
  • the grinding assembly comprises a blade 421 and a blade shaft 422 .
  • the brewing chamber 412 is provided with a mounting hole for mounting the blade shaft 422 .
  • One end of the blade shaft 422 is mounted on an inner bottom of the brewing chamber 412 and is fixedly connected to the blade 421 . Another end of the blade shaft 422 extends out of the brewing chamber 412 through the mounting hole and is connected to the motor 43 by means of a coupling joint assembly. As shown in FIGS. 1 to 3 , the blade shaft 422 in the mounting hole is provided with a shaft sleeve 423 , and a seal is formed between the shaft sleeve 423 and the mounting hole by a sealing ring 424 .
  • the coupling joint assembly is provided at a position corresponding to the grinding assembly, at a lower side of the brewing chamber 412 .
  • the coupling joint assembly is consisting of an upper coupling joint 431 and a lower coupling joint 432 .
  • the blade shaft 422 is connected to the upper coupling joint 431 , and the upper coupling joint 431 is disposed over a motor shaft of the motor 43 .
  • the lower coupling joint 432 is engaged with the upper coupling joint 431 .
  • the motor 43 is actuated, the blade shaft 422 and the blade 421 is driven to be rotated by the motor, and coffee beans in the brewing chamber are ground to be coffee powder in the end by the blade 421 .
  • the heating device 3 may provide hot water for the brewing chamber 412 , and coffee powder and hot water are mixed to form coffee liquid. The specific brewing process will be described in detail below.
  • the first filter 44 is an annular first filter mesh 44 which is adapted to the shape of the bottom of the brewing chamber 412 .
  • the blade shaft 422 is surrounded by the first filter 44 and the first filter 44 is laid on the inner bottom surface of the brewing chamber 412 , and at the lower side of the blade 421 .
  • the outer peripheral edge of the first filter 44 is provided with a handle 441 such that the first filter 44 can be taken out before cleaning the first filter 44 .
  • the bottom of the brewing chamber 412 is provided with a liquid channel 411 communicated with the brewing chamber 412 , such that coffee liquid in the brewing chamber 412 flows towards the liquid channel 411 due to gravity. Coffee liquid inside the brewing chamber 412 can be easily filtered by the first filter 44 located on the inner bottom surface of the brewing chamber 412 and flows into liquid channel 411 .
  • the chamber 41 comprises a brewing chamber 412 and a collecting chamber 413 .
  • the collecting chamber 413 is communicated with the brewing chamber 412 via the liquid channel 411 such that filtered coffee liquid flows into the collecting chamber 413 through the liquid channel 411 .
  • a bottom of the collecting chamber is provided with a collecting chamber valve 414 for controlling the discharge of coffee liquid from the collecting chamber 413 .
  • a second filter 415 is provided inside the collecting chamber 413 , and the second filter 415 is erectly arranged to form a wall surrounding the collecting chamber valve 414 inside the collecting chamber 413 .
  • a lower portion of the wall has a plurality of filter holes.
  • the second filter 415 is hold and fixed by the bottom of the first lid body 6 and the bottom surface of the collecting chamber 413 .
  • the chamber 41 may not comprises the collecting chamber 413 , and coffee liquid in the brewing chamber 412 is directly discharged through the first filter 44 from the liquid channel 411 .
  • a liquid channel valve may be provided on the liquid channel 411 as required to control the discharge of the liquid.
  • the second filter may be provided in the liquid channel 411 to re-filter coffee liquid.
  • the coffee machine further comprises a flow guiding device.
  • the flow guiding device comprises a first flow guiding channel 51 and a second flow guiding channel 52 detachably connected to the first flow guiding channel 51 .
  • the first end 511 of the first flow guiding channel 51 is connected to the heating device 3 .
  • the second flow guiding channel 52 has a water inlet 524 and a water outlet 525 .
  • the water outlet 525 is located at a position corresponding to a brewing chamber opening 416 such that liquid is supplied to the brewing chamber 412 .
  • the first lid body 6 is detachably engaged with the main body 1 .
  • the first lid body 6 comprises a first upper lid body 61 and a first lower lid body 62 .
  • the first upper lid body 61 is engaged with the first lower lid body 62 so as to form a cavity 523 .
  • the first lower lid body 62 extends downwardly to form a first pipe portion 521 and a second pipe portion 522 of the second flow guiding channel 52 , and the first pipe portion 521 and the second pipe portion 522 is communicated with the cavity 523 , respectively.
  • the cavity 523 is provided with a cavity channel 526 having a cavity channel lid 527 and an open top. The open top is covered by the cavity channel lid 527 to define the flowing direction of hot water passing through the cavity channel 526 .
  • the water inlet 524 and the water outlet 525 are fluidly communicated to the cavity channel 526 respectively so as to form the second flow guiding channel 52 .
  • the water inlet 524 and the water outlet 525 of the second flow guiding channel 52 are located at lower ends of the first pipe portion 521 and the second pipe portion 522 respectively.
  • the first pipe portion 521 is inserted into the second end 512 of the first flow guiding channel 51 to communicate with the first flow guiding channel 51 .
  • One end of the heating device 3 is communicated with the water tank 2 , and the heating device 3 is located on the a lower side of the water tank 2 , such that water flows from the water tank into the heating device 3 and is heated to be hot water.
  • a check valve 31 is provided at the junction of the heating device 3 with the water tank 2 to prevent a back flow of hot water from the heating device 3 into the water tank.
  • the first end 511 of the first flow guiding channel 51 is communicated with another end of the heating device 3 .
  • Water which flowed into heating device 3 forms a pressure, when water is heated, to push a flow of hot water into the first end 511 of the first flow guiding channel 51 .
  • Hot water enters into the second flow guiding channel 52 along the first flow guiding channel 51 , i.e., hot water enters into the first pipe portion 521 , the cavity channel 526 and the second pipe portion 522 successively, and finally enters into the brewing chamber 412 and is mixed with the coffee powder to form coffee liquid.
  • a nozzle (which is not shown) is provided at the water outlet 525 of the second pipe portion 522 such that liquid is ejected into the brewing chamber 412 via nozzle. Since the first pipe portion 521 is communicated with the cavity 523 of the first lid body 6 , the lower end of the first pipe portion 521 is pulled out from the first flow guiding channel 51 when the first lid body 6 is removed from the main body 1 . This operation may cause danger when hot water is transferred into the brewing chamber 412 by the flow guiding device, since the hot water transferred by the first flow guiding channel 51 would be directly ejected out of the main body 1 due to water pressure and thereby causing scald of a user.
  • the coffee machine further comprises a blocking device provided for preventing hot water from being ejected out of the main body.
  • the blocking device is an elastic assembly which comprises a baffle 71 and a torsion spring 712 .
  • a backflow channel 21 is provided inside the main body 1 .
  • the backflow channel 21 is communicated to an upper portion of the water tank 2 and the first flow guiding channel 51 respectively.
  • the backflow channel 21 is perpendicular to the first flow guiding channel 51 .
  • One end of the backflow channel 21 is connected to the upper portion of the tank 2 and another end of the backflow channel 21 is the closed end.
  • An upper side wall of the backflow channel 21 is provided with an upper opening 211 which is communicated with the main body opening, and a lower side wall of the backflow channel 21 is provided with a lower opening 212 which is communicated with the second end 512 of the first flow guiding channel 51 .
  • the torsion spring 712 is fixed in the backflow channel 21 .
  • a first end of the baffle 71 is connected to the torsion spring 712 and a second end of the baffle 71 is a free end which is movable around the first end.
  • the upper opening 211 is downwardly provided with a flange 213 which is slightly higher than the first end of the baffle 71 .
  • the baffle 71 is abutted against the flange 213 under the action of an elastic force and is located at a first position such that the upper opening 211 is closed.
  • the second end of the baffle 71 is pushed to be moved from a first position (horizontal position) around the first end of the baffle 71 to a second position (vertical position) by the first pipe portion 521 , such that the first pipe portion 521 is communicated with the second end 512 of the first flow guiding channel 51 .
  • a second lid body 63 for covering the brewing chamber opening 416 is provided on a lower side of the first lid body 6 .
  • An elastic member 633 is provided between the first lid body 6 and the second lid body 63 , such that a relative seal is formed between the second lid body 63 and the brewing chamber 412 when the first lid body 6 is fixed onto the main body 1 .
  • a middle portion of the second lid body 63 is provided with a second lid body through hole 631 which is located at a position corresponding to the second pipe portion 522 .
  • the second lid body 63 is disposed over the second pipe portion 522 via the second lid body through hole 631 .
  • the elastic member 633 is a spring 633 which is disposed over the second pipe portion 522 and is located between the second lid body 63 and the bottom of the first lid body 6 .
  • a surrounding wall 101 extending out of the main body opening is protruded upwardly from the main body opening.
  • a side portion of the first lid body 6 is provided with a locking button 611 and a buckle 621 .
  • the surrounding wall 101 is provided with a buckling part 622 corresponding to a buckle 621 .
  • the locking button 611 is used for driving the buckle 621 to be engaged with the buckling part 622 .
  • the first lid body 6 When in use, the first lid body 6 is placed on the main body opening; and the buckle 621 is pressed into the first lid body 6 by pressing the locking button 611 , the first lid body 6 is pressed into the main body 1 such that a bottom of the first lid body 6 is inserted into a space surrounded by the surrounding wall 101 ; an outer wall of the first lower lid body 62 is in contact with a inner wall of the surrounding wall 101 ; the buckle 621 is inserted into the buckling part 622 and is firmly engaged with the buckling part 622 , and the first lid body 6 is thus fixed onto the main body 1 .
  • the second lid body 63 is pushed to be abutted against the brewing chamber opening 416 by the first lid body 6 via the spring 633 .
  • the first lid body 6 is locked on the main body 1 such that the spring 633 is compressed between the second lid body 63 and the first lid body 6 , and an elastic force is provided by the compressed spring 633 such that the second lid body 63 is firmly engaged with the opening of the brewing chamber 412 .
  • a relative seal is formed between the second lid body 63 and the opening of the brewing chamber 412 to prevent coffee powder escaping with a steam in the brewing chamber 412 from a gap between the second lid body 63 and the opening of the brewing chamber 412 .
  • the second lid body 63 is provided with a plurality of second exhaust holes 632 for discharging excess steam in the brewing chamber 412 to prevent a high pressure in the brewing chamber 412 .
  • the second exhaust holes 632 have a diameter of about 0.5 mm and the second exhaust holes 632 are finely distributed on the second lid body 63 such that a part of the second lid body 63 forms a mesh structure to prevent the coffee powder being discharged with a steam from the second exhaust holes 632 .
  • the first lid body 6 is provided with a plurality of first exhaust holes 601 .
  • the first exhaust hole 601 is communicated with the second exhaust hole 632 , and a part of steam in the brewing chamber 412 is discharged by the second exhaust holes 632 , and thus the steam is discharged out of the main body through the first exhaust holes 601 .
  • a working method for the coffee machine of the present embodiment comprises the following steps: a. adding liquid into the water tank 2 , and adding coffee particles into the grinding and filtering device; b. grinding coffee particles by the grinding and filtering device; c. transferring liquid into the heating device 3 from the water tank 2 , heating liquid by the heating device 3 ; d. transferring heated liquid into the grinding and filtering device from the heating device 3 through the flow guiding device, mixing liquid with grinded coffee particles in the grinding and filtering device to form coffee liquid; e. filtering coffee liquid by the grinding and filtering device; f. discharging filtered coffee liquid from the grinding and filtering device.
  • the working method further comprises a step g between step a and step b: covering the main body opening with the first lid body 6 such that first flow guiding channel 51 is connected to the second flow guiding channel 52 ; and wherein step d comprises: causing heated liquid to flow from the heating device 3 into the first flow guiding channel 51 and the second flow guiding channel 52 successively and to enter into the brewing chamber from the second flow guiding channel 52 .
  • step d further comprises: blocking liquid from being ejected out of the main body opening by the blocking device when the second flow guiding channel 52 is detached from the first flow guiding channel 51 during the supplying process of water from the heating device 3 into the flow guiding device.
  • step d further comprises: causing at least a part of liquid blocked by the blocking device to enter into the backflow channel 21 and to flow into the water tank 2 .
  • the present embodiment is substantially the same as that of Embodiment 1 except that the structure of the flow guiding device is different.
  • the flow guiding device of the coffee machine in the present embodiment is similar to that shown in FIG. 2 .
  • the flow guiding device of the coffee machine in the present embodiment does not have a second flow guiding channel 52 .
  • the flow guiding device of the coffee machine in the present embodiment comprises a first flow guiding channel 51 , and the first end 511 of the first flow guiding channel 51 is connected to the heating device 3 .
  • the brewing chamber 412 is provided with a brewing chamber through hole corresponding to a second end 512 of the first flow guiding channel 51 .
  • the second end 512 of the first flow guiding channel 51 is inserted into the brewing chamber 412 through the brewing chamber through hole.
  • the present embodiment is substantially the same as that of Embodiment 1 except that the structure of the blocking device is different.
  • the whole structure of the coffee machine in the present embodiment is similar to that shown in FIG. 1 and FIG. 2 .
  • the blocking device is a sheet-like elastic single piece 72 fixed onto the upper opening 211 .
  • the elastic single piece 72 has a circular cross section, which corresponds to the shape of the corresponding upper opening 211 .
  • a middle portion of the elastic single piece 72 is provided with a cutout 721 .
  • the periphery of the elastic single piece 72 is provided with a convex wall 722 which tightly surrounds a flange 213 and is fixed to an outer side wall of the flange 213 .
  • the cutout 721 of the elastic single piece 72 is opened by the first pipe portion 521 and thus the first pipe portion 521 of the second flow guiding channel 52 can be inserted into the first flow guiding channel 51 through the cutout 721 of the elastic single piece 72 .
  • the first pipe portion 521 is detached from the second end 512 of the first flow guiding channel 51 , the first pipe portion 521 is pulled out from the cutout such that the opened cutout 721 is closed. Liquid ejected out of the second end 512 of the first flow guiding channel 51 is thus blocked by the elastic single piece 72 with the closed cutout 721 and flows back into the water tank 2 through the backflow channel 21 .
  • the present embodiment is substantially the same as that of Embodiment 3 except that the number and the relative position of the cut 721 of the elastic single piece 72 are different.
  • the whole structure of the coffee machine in the present embodiment is similar to that shown in FIG. 1 and FIG. 2 .
  • the middle portion of the elastic single piece 72 is provided with at least two cutouts 721 which cross each other.
  • the connection of elastic single piece 72 with the upper opening 211 in the backflow channel 21 is same as that in Embodiment 3, which will not be described again.
  • the present embodiment is substantially the same as that of Embodiment 1 except that the structure of the first pipe portion 521 and the second end 512 of the first flow guiding channel 51 and the connection of the first pipe portion 521 with the second end 512 of the first flow guiding channel 51 are different.
  • FIG. 14 is a schematic cross-sectional view which only shows that the first pipe portion 521 is connected to the second end 512 of the first flow guiding channel 51 .
  • the whole structure of the coffee machine in the present embodiment is similar to that shown in FIG. 1 and FIG. 2 .
  • a lower end of the first pipe portion 521 has the water inlet 524 of the second flow guiding channel 52 .
  • the diameter of the water inlet 524 is smaller than the diameter of the first pipe portion 521 .
  • the second end 512 of the first flow guiding channel 51 is inserted into the first pipe portion 521 of the second flow guiding channel 52 through the water inlet 524 .
  • the gap is provided between the side wall outlet 514 and the first pipe portion 521 , such that hot water flows from the side wall outlet 514 into the second flow guiding channel 52 .

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Apparatus For Making Beverages (AREA)
  • Crushing And Pulverization Processes (AREA)
US15/570,385 2015-04-28 2016-04-20 Coffee machine and working method therefor Abandoned US20180140130A1 (en)

Applications Claiming Priority (5)

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CN201520261466.7 2015-04-28
CN201520261466 2015-04-28
CN201510878078.8A CN105395059B (zh) 2015-04-28 2015-12-04 一种磨豆咖啡壶的流水装置
CN201510878078.8 2015-12-04
PCT/CN2016/079704 WO2016173431A1 (fr) 2015-04-28 2016-04-20 Machine à café et son procédé de fonctionnement

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JP (2) JP2018513770A (fr)
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