WO2018049789A1 - 咖啡机以及咖啡制备方法 - Google Patents

咖啡机以及咖啡制备方法 Download PDF

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Publication number
WO2018049789A1
WO2018049789A1 PCT/CN2017/074249 CN2017074249W WO2018049789A1 WO 2018049789 A1 WO2018049789 A1 WO 2018049789A1 CN 2017074249 W CN2017074249 W CN 2017074249W WO 2018049789 A1 WO2018049789 A1 WO 2018049789A1
Authority
WO
WIPO (PCT)
Prior art keywords
coffee
cavity
grinding
chamber
machine according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/074249
Other languages
English (en)
French (fr)
Inventor
任立忠
邝坚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
Guangdong Midea Consumer Electric Manufacturing Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea Consumer Electric Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201610825498.4A external-priority patent/CN107811513B/zh
Priority claimed from CN201610826055.7A external-priority patent/CN107811514B/zh
Priority claimed from CN201621057724.0U external-priority patent/CN206284885U/zh
Priority claimed from CN201621058049.3U external-priority patent/CN206333753U/zh
Application filed by Midea Group Co Ltd, Guangdong Midea Consumer Electric Manufacturing Co Ltd filed Critical Midea Group Co Ltd
Priority to US15/578,712 priority Critical patent/US10694885B2/en
Priority to JP2018512513A priority patent/JP6647393B2/ja
Priority to EP17800996.5A priority patent/EP3513689B1/en
Publication of WO2018049789A1 publication Critical patent/WO2018049789A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • A47J31/34—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 with hot water under liquid 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
    • A47J31/18—Apparatus in which ground coffee or tea-leaves are immersed in the hot liquid in the beverage container
    • 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
    • A47J31/06—Filters or strainers for coffee or tea makers ; Holders therefor
    • A47J31/0657—Filters or strainers for coffee or tea makers ; Holders therefor for brewing coffee under pressure, e.g. for espresso machines
    • A47J31/0663—Filters or strainers for coffee or tea makers ; Holders therefor for brewing coffee under pressure, e.g. for espresso machines to be used with loose coffee
    • 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
    • A47J31/0657—Filters or strainers for coffee or tea makers ; Holders therefor for brewing coffee under pressure, e.g. for espresso machines
    • A47J31/0684—Sealing means for sealing the filter holder to the brewing head
    • 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
    • A47J31/32—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 with hot water under air 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
    • A47J31/40—Beverage-making apparatus with dispensing means for adding a measured quantity of ingredients, e.g. coffee, water, sugar, cocoa, milk, tea
    • A47J31/405—Beverage-making apparatus with dispensing means for adding a measured quantity of ingredients, e.g. coffee, water, sugar, cocoa, milk, tea with one or more infusion chambers moving successively between loading, infusing and dumping stations
    • 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
    • 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
    • A47J31/4403—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
    • A47J31/4403—Constructional details
    • A47J31/446—Filter holding means; Attachment of filters to 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
    • A47J31/46—Dispensing spouts, pumps, drain valves or like liquid transporting 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
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/48—Clips, rings, hooks, or like devices to support filter parts while not in use
    • 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
    • A47J31/0605—Filters or strainers for coffee or tea makers ; Holders therefor with a valve at the filter-outlet; Anti-drip 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
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/54—Water boiling vessels in beverage making machines

Definitions

  • the invention relates to the field of household appliances, in particular to a coffee machine and a coffee preparation method.
  • a filter screen is arranged in the brewing chamber.
  • the coffee powder is usually put into the filter net, and then the hot water is poured into the filter to brew coffee. It can be understood that the coffee is brewed under normal pressure, so that it is difficult to obtain sufficient infiltration of the coffee powder, and the coffee obtained by brewing is not sufficiently thick.
  • the main object of the present invention is to propose a coffee machine which is intended to achieve micro-pressure brewing of coffee for brewing to obtain a thicker coffee.
  • the coffee machine of the present invention comprises:
  • a grinding chamber comprising a cavity and a cover, the cavity is mounted on the base, the cover covers the cavity to form a grinding cavity, and the bottom of the grinding cavity is provided with a beverage outlet;
  • a grinding device comprising: a grinding blade set disposed in the grinding chamber; and a motor disposed outside the polishing cavity for driving the rotation of the grinding blade set;
  • a coffee filter disposed at a periphery of the grinding blade set, and a lower end of the coffee filter mesh abuts against a bottom wall of the grinding cavity, partitioning the grinding cavity into a grinding bean cavity and located in the grinding bean cavity a peripheral beverage chamber, the beverage outlet being in communication with the beverage chamber setting;
  • the hot water supply device is in communication with the grinding chamber for supplying hot water into the grind chamber, and after the hot water of the preset volume is injected into the grinder chamber, a pressure space is formed thereon.
  • an upper portion of the coffee filter is sealingly connected to the cavity, and the cavity is sealingly connected to the cover.
  • a first sealing ring is disposed between an upper portion of the coffee filter and an upper portion of the cavity.
  • an outer side surface of the coffee filter net portion is provided with a positioning ring groove for setting the first sealing ring sleeve, the first sealing ring portion protrudes from the positioning ring groove, and elastically resists the The inner side of the upper part of the cavity.
  • a second sealing ring is disposed between the inner end surface of the cover body and the upper end surface of the cavity.
  • the upper portion of the coffee filter is sealingly connected to the cover.
  • the upper portion of the coffee filter and the cover are radially sealed by a first sealing ring.
  • the cover body is provided with a protrusion extending into the coffee filter screen and arranged in a column shape, and the outer peripheral surface of the protrusion portion and the inner peripheral surface of the upper portion of the coffee filter screen are provided with the First sealing ring.
  • the first sealing ring comprises a sealing body which is annular and extends in the axial direction of the grinding cavity, and an outer side of the sealing body is provided with at least one ring of sealing ribs arranged in a ring shape, The sealing bead elastically abuts against the inner peripheral surface of the coffee screen portion.
  • the upper end of the sealing body extends in a radially outward direction of the grinding cavity to be provided with a limiting flange, and an upper end surface of the coffee filter meshes against the limiting flange.
  • a second sealing ring is disposed between an upper portion of the coffee filter and an upper portion of the cavity.
  • an outer side surface of the coffee filter net portion is provided with a positioning ring groove for setting the second sealing ring sleeve, the second sealing ring portion protrudes from the positioning ring groove, and elastically resists the The inner side of the upper part of the cavity.
  • a sealing gasket is disposed between the inner end surface of the cover body and the upper end surface of the coffee filter.
  • the cavity is provided with an annular step on the upper portion of the inner end surface of the cover, the upper end surface of the coffee filter is higher or flush with the annular step, and the sealing gasket is further disposed. Between the annular step and the inner side edge of the cover.
  • the coffee filter is an all metal mesh.
  • the filter holes of the all-metal screen are disposed in the middle and/or the lower portion of the all-metal screen.
  • the coffee filter comprises a screen body disposed at a periphery of the grinding blade set, and a fixing frame disposed in a cylindrical shape, and an axial lower end of the fixing frame is fixedly coupled to the shaft of the screen body At an upper end, an axial lower end of the screen body is a lower end of the coffee filter, and an axial upper portion of the fixing frame is an upper portion of the coffee filter.
  • the screen body is a metal piece
  • the fixing frame is a plastic piece
  • the fixing frame is fixed to the screen body by injection molding.
  • the bottom wall of the cavity is provided with a boss, and the screen body is sleeved on the boss to be positioned in the grinding cavity.
  • the coffee filter comprises a first screen body disposed at a periphery of the grinding blade set, and a second screen body at least at a periphery of a lower portion of the first screen body, and the A screen body and a lower end of the second screen body abut against a bottom wall of the grinding chamber to restrict the grinding between the first screen body and the second screen body a secondary filtration chamber between the bean cavity and the beverage chamber.
  • the hot water supply device includes a water tank, a water supply pipe connecting the water tank and the grinding chamber, and a water pump and a heating pipe provided on the water supply pipe.
  • the hot water supply device includes a boiler, a water supply pipe connecting the boiler and the grinding chamber, and a water pump disposed on the water supply pipe.
  • a temperature sensor is provided in the boiler.
  • the boiler is arranged side by side with the cavity.
  • the cover body is provided with a first water inlet, and the hot water supply device communicates with the grinding chamber through the first water inlet.
  • the first water inlet is disposed at a lower end surface of the cover body, and the open end of the cavity is provided with an annular step extending radially outward, and the annular step is provided with the hot water a supply device and a second water inlet of the first water inlet.
  • the beverage outlet is provided with an outlet valve.
  • the liquid discharge valve includes a valve body, an upper portion of the valve body is provided with a sealing piece, and a lower portion of the valve body is provided with an annular boss, and the annular boss and the lower end surface of the beverage outlet Elastic members are provided between them.
  • the cavity is detachably connected to the base.
  • the gas pressure in the pressure space is greater than or equal to 1 bar and less than or equal to 2 bar.
  • the pressure in the pressure space ranges from 1.3 bar to 1.7 bar.
  • the present invention also provides a coffee preparation method, and the coffee machine used in the coffee preparation method comprises:
  • a grinding chamber comprising a cavity and a cover, the cavity is mounted on the base, the cover covers the cavity to form a grinding cavity, and the bottom of the grinding cavity is provided with a beverage outlet;
  • a grinding device comprising: a grinding blade set disposed in the grinding chamber; and a motor disposed outside the polishing cavity for driving the rotation of the grinding blade set;
  • a coffee filter disposed at a periphery of the grinding blade set, and a lower end of the coffee filter mesh abuts against a bottom wall of the grinding cavity, partitioning the grinding cavity into a grinding bean cavity and located in the grinding bean cavity a peripheral beverage chamber, the beverage outlet being in communication with the beverage chamber setting;
  • a hot water supply device communicating with the grinding chamber for supplying hot water into the grind chamber
  • the coffee preparation method comprises the following steps:
  • the grinding blade group grinds the coffee beans put into the grinding bean cavity into coffee powder
  • the hot water supply device injects hot water into the grind chamber, and after injecting a preset volume of hot water into the grinder chamber, a pressure space is formed thereon to perform the coffee liquid in the grind chamber Pressure brewing.
  • the hot water supply device further comprises the steps of:
  • the hot water supply device injects air into the grind chamber to increase or maintain air pressure in the pressure space.
  • the pressure in the pressure space ranges from 1.3 bar to 1.7 bar.
  • the water inlet rate of the hot water supply device by adjusting the water inlet rate of the hot water supply device, the water inlet rate is greater than the water outlet rate of the coffee filter, and when the water in the grinding bean chamber overflows the filter hole portion in the coffee filter, A pressure space can be formed in the upper part of the coffee filter to micro-press the coffee, so as to fully infiltrate the coffee powder, so that the brewed coffee is thicker.
  • FIG. 1 is a schematic structural view of an embodiment of a coffee machine of the present invention
  • FIG. 2 is a partial structural view of the coffee machine of Figure 1;
  • FIG. 3 is a schematic structural view of another embodiment of the coffee machine of the present invention.
  • Figure 4 is a partial structural view of the coffee machine of Figure 3;
  • Figure 5 is a schematic enlarged view of the structure at A in Figure 4.
  • FIG. 6 is a partial structural schematic view of still another embodiment of the coffee machine of the present invention. wherein the filter body of the coffee filter is hidden
  • FIG. 7 is a schematic flow chart of an embodiment of a method for preparing coffee according to the present invention.
  • the directional indication is only used to explain in a certain posture (as shown in the drawing)
  • the relative positional relationship between the components, the motion situation, and the like if the specific posture changes, the directional indication also changes accordingly.
  • first”, “second”, etc. in the embodiments of the present invention, the description of the "first”, “second”, etc. is used for the purpose of description only, and is not to be construed as an Its relative importance or implicit indication of the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. It is also within the scope of protection required by the present invention.
  • the invention proposes a coffee machine.
  • the coffee machine includes:
  • the grinding chamber 2 includes a cavity 21 and a cover 22, the cavity 21 is mounted on the base 1, the cover 22 covers the cavity 21 to form a grinding chamber 20, and the bottom of the grinding chamber 20 is provided with a beverage outlet 23;
  • the grinding device 3 includes a grinding blade set 31 disposed in the grinding chamber 20, and a motor 32 disposed outside the grinding chamber 20 for driving the rotation of the grinding blade set 31;
  • the coffee filter 4 is disposed on the periphery of the grinding blade set 31, and the lower end of the coffee filter 4 abuts against the bottom wall of the grinding chamber 20 to divide the grinding chamber 20 into the grinding chamber 201 and the periphery of the grinding chamber 201.
  • a beverage chamber 202, the beverage outlet 23 is connected to the beverage chamber 202;
  • the hot water supply device 5 is in communication with the grinding chamber 20 for supplying hot water into the grind chamber 201. After the hot water of the preset volume is supplied to the grind chamber 201, a pressure space is formed thereon;
  • An electric control device (not shown) is electrically connected to both the polishing device 3 and the hot water supply device 5 for controlling the operation of the polishing device 3 and the hot water supply device 5.
  • the preset volume of hot water refers to the volume of hot water that can flow over the filter portion of the coffee filter 4; it can be understood that since the coffee filter 4 has a certain throttling effect, the hot water supply device 5
  • the hot water of the preset volume is quickly injected, and after the hot water is passed over the filter portion of the coffee filter 4, the hot water level outside the coffee filter 4 is lower than the water level in the coffee filter 4, and continues to be fast.
  • the pressure space can be formed in the upper portion of the coffee filter 4 by injecting hot water.
  • the water inlet rate of the hot water supply device 5 can be adjusted to make the water inlet rate higher than the water output rate of the coffee filter 4, and the water in the grinding bean chamber overflows through the filter hole of the coffee filter 4.
  • the pressure space can be formed in the upper portion of the coffee filter 4 to micro-buffer the coffee to fully infiltrate the coffee powder so that the brewed coffee is thicker. It should be noted that, in this embodiment, after the amount of hot water injected into the grind chamber 201 by the hot water supply device 5 reaches a preset value, air can be continuously injected into the grind chamber 201 through the hot water supply device 5. To increase or maintain the air pressure in the pressure space, thereby achieving continuous micro-pressure brewing of the coffee liquid.
  • the air pressure in the pressure space is greater than or equal to 1 bar and less than or equal to 2 bar to avoid excessive air pressure in the pressure space. It can be understood that the pressure excessively increases the coffee filter 4 The rate of water discharge affects the infiltration time of the coffee powder.
  • the gas pressure in the pressure space cannot be too small, and thus the gas pressure range in the pressure space is usually limited to 1.3 bar to 1.7 bar.
  • the total area of the filter screen of the coffee filter 4 and the number of filter holes are usually predetermined, so that the throttling effect of the coffee filter 4 is predetermined. In this case, the influent rate required for the hot water supply device 5 can be obtained experimentally so that the pressure space has a suitable gas pressure.
  • the upper portion of the coffee filter 4 is sealingly connected with the cavity 21, and the cavity 21 is sealingly connected with the cover 22, so that the cover 22 can indirectly seal the upper portion of the coffee filter 4, thereby realizing
  • the cover 22 seals the upper portion of the grinder chamber 201.
  • the present design is not limited thereto.
  • the sealing of the upper portion of the grind chamber 201 by the cover 22 can also be achieved by a direct sealing connection between the upper portion of the coffee filter 4 and the cover 22.
  • a first sealing ring 6 is disposed between the upper portion of the coffee filter 4 and the upper portion of the cavity 21, such that the upper portion of the coffee filter 4 can pass the first seal.
  • the ring 6 achieves a sealed connection with the cavity 21.
  • the present design is not limited thereto.
  • the upper portion of the coffee filter 4 may also be in a sealed connection with the upper portion of the cavity 21 by a spiral sealing structure.
  • the outer side of the upper portion of the coffee filter 4 is provided with a positioning ring groove 40 for setting the first sealing ring 6 to limit the first sealing ring 6 and the coffee filter 4 and the cavity.
  • the relative movement between the bodies 21 prevents the first sealing ring 6 from sliding into the cavity 21 as a whole, thereby preventing the sealing failure between the upper portion of the coffee filter 4 and the cavity 21.
  • the first sealing ring 6 partially protrudes from the positioning ring groove 40 and elastically abuts against the inner side surface of the upper portion of the cavity 21.
  • a second sealing ring 7 is preferably disposed between the inner end surface of the cover 22 and the upper end surface of the cavity 21, so that the cover 22 can be realized with the cavity 21 through the second sealing ring 7. Sealed connection between.
  • the present design is not limited thereto. In other embodiments, the sealing connection between the cover 22 and the cavity 21 can also be achieved by a spiral sealing structure.
  • the coffee filter 4 is an all-metal filter, that is, the coffee filter 4 is entirely made of a metal material, such as but not limited to a die casting process or a sheet metal process.
  • the processing is formed such that the coffee filter 4 can have a better overall rigidity and can enhance the ability of the coffee filter 4 to withstand the outward impact of the coffee beans and the coffee particles.
  • the coffee filter 4 is made of stainless steel material, the stainless steel material has strong rigidity, and can better resist the outward impact force of the coffee bean and the coffee granule; of course, in other embodiments, the coffee filter 4 can also However, it is not limited to being made of other metal materials such as aluminum alloy and titanium alloy.
  • the filter holes of the all-metal filter are preferably disposed only in the middle and/or the lower portion of the all-metal filter, that is, the upper portion of the all-metal filter is not provided with a filter hole.
  • the coffee filter 4 may further include a screen body disposed on the periphery of the grinding blade set 31, and a fixing frame disposed in a cylindrical shape, and the axial lower end of the fixing frame is fixed. Connected to the axial upper end of the screen body, the axial lower end of the screen body is the lower end of the coffee filter 4, and the axial upper part of the fixing frame is the upper part of the coffee filter 4; wherein, the filter body
  • the fixing frame is made of plastic parts.
  • the fixing frame can be conveniently fixed to the filter body by injection molding, and the injection molding process is a mature processing technology, which is beneficial to the coffee filter screen.
  • the filter hole of the coffee filter 4 is disposed on the filter body, the fixing frame is used to assist in fixing the filter body, and the filter frame is not provided with the filter hole, After the hot water diffuses the filter body, an absolute closed space can be formed between the cylindrical fixing frame and the cover 22, so that the brewing effect of the coffee is better.
  • the hot water supply device 5 includes a boiler 51, a water supply pipe 52 connecting the boiler 51 and the grinding chamber 20, and a water pump 53 disposed on the water supply pipe 52.
  • the boiler 51 has a water storage space for heating the water in the water storage space into hot water
  • the water supply pump 53 is injected into the grind chamber 201 through the water supply pipe 52.
  • the water pump 53 also has an effect of injecting air into the grinder chamber 201.
  • the present design is not limited thereto.
  • the hot water supply device 5 may include a water tank, a water supply pipe connecting the water tank and the grinding chamber 20, and a water pump and a heating pipe disposed on the water supply pipe, and the heating pipe may be disposed inside the water supply pipe.
  • the water is heated to hot water so that the water injected into the grind chamber 201 by the water pump is hot water.
  • the temperature sensor 8 is preferably disposed in the boiler 51. It can be understood that the temperature sensor 8 is electrically connected to the electronic control device, so that the electronic control device can obtain water in the boiler 51. The temperature, and when the actual water temperature reaches the preset water temperature, controls the water pump 53 to inject the hot water of the preset water temperature into the grind chamber 201, so that the brewed coffee has a proper temperature and a better taste. Further, in the present embodiment, the boiler 51 is preferably disposed side by side with the cavity 21 to prevent the overall height of the coffee machine from being too high.
  • the cover 22 is provided with a first water inlet 221 through which the hot water supply device 5 communicates with the grinding chamber 20, so that the cover can be appropriately adjusted.
  • the hot water can be conveniently injected into the grind chamber 201.
  • the hot water supply device 5 can also directly communicate with the grinding chamber 20 through the cavity 21, that is, the water inlet is opened on the side wall of the cavity 21.
  • the first water inlet 221 is disposed at a lower end surface of the cover body 22.
  • the open end of the cavity 21 is provided with an annular step 211 extending radially outward, and the annular step 211 is provided with a communication hot water supply device 5
  • the second water inlet 212 of the first water inlet 221 so that the first water inlet 221 is directly disposed on the side of the cover 22 facing the boiler 51, the technical solution can make the grinding chamber 2 and The spacing between the boilers 51 is smaller, making the overall structure of the coffee machine more compact and smaller.
  • the cavity 21 is detachably connected to the base 1, so that when the grinding chamber 2 needs to be cleaned, the grinding chamber 2 can be detached from the base 1, thereby conveniently facing the grinding chamber 2 Carry out all-round cleaning.
  • the beverage outlet 23 is preferably provided with an outlet valve 9, which can close the beverage outlet 23 after the grinding chamber 2 is detached from the base 1, to avoid the cavity 21
  • the coffee residue inside flows from the beverage outlet 23 to the table top or the ground.
  • the liquid discharge valve 9 includes a valve body 91.
  • the upper portion of the valve body 91 is provided with a sealing piece 92.
  • the lower part of the valve body 91 is provided with an annular boss 911, and the annular boss 911 and the beverage outlet 23 An elastic member (93) 93 is disposed between the lower end faces; thus, when the lower end of the valve body 91 is subjected to an upward lifting force, the elastic member (93) 93 is shortened, and the valve body 91 is placed on the sealing piece 92.
  • the beverage outlet 23 is moved open so that the coffee liquid can flow out from the beverage outlet 23, and when the lifting force received by the valve body 91 disappears (for example, after the grinding chamber 2 is detached from the machine base 1), the elastic member (93) 93 will elongate, and the valve body 91 will be moved downward with the sealing piece 92 to close the beverage outlet 23, thereby preventing the coffee residue from flowing out of the beverage outlet 23.
  • the elastic member (93) 93 is a compression spring; of course, in other embodiments, the elastic member (93) 93 can be, but is not limited to, an elastic sleeve or the like.
  • the liquid outlet valve 9 may also be a control valve of other configurations as long as the opening and closing of the beverage outlet 23 can be achieved.
  • FIG. 3 is a schematic structural view of another embodiment of the coffee machine of the present invention.
  • This other embodiment is different from the previous embodiment in that the upper portion of the coffee filter 4 is sealingly connected to the cover 22 to adjust the water inlet rate of the hot water supply device 5 so that the water inlet rate is greater than that of the coffee filter 4
  • the water discharge rate when the water flows over the filter portion of the coffee filter 4, the pressure space can be formed in the upper portion of the coffee filter 4 to micro-buffer the coffee, thereby fully infiltrating the coffee powder. In order to make the brewed coffee more thick.
  • the cover body 22 is provided with a protrusion 223 extending in the upper portion of the coffee filter 4 and arranged in a column shape, and a first sealing ring is disposed between the outer circumferential surface of the protrusion portion 223 and the inner circumferential surface of the upper portion of the coffee filter 4 6.
  • the protrusion 223 may also be in a sealed connection with the upper portion of the coffee filter 4 through a spiral sealing structure.
  • the inner end surface of the cover 22 may be provided with a protruding sleeve, and the outer peripheral surface of the upper portion of the coffee filter 4 is sealingly connected with the inner peripheral surface of the sleeve, or the inside of the upper portion of the coffee filter 4.
  • the circumferential surface is sealingly connected to the outer peripheral surface of the sleeve.
  • the first sealing ring 6 includes a sealing body 61 that is annular and extends in the axial direction of the grinding chamber 20.
  • the inner side of the sealing body 61 is attached to the
  • the outer peripheral surface of the protruding portion is provided with at least one ring of sealing ribs 62 arranged in a ring shape, and the sealing rib 62 elastically abuts against the inner peripheral surface of the upper portion of the coffee filter 4. It can be understood that the addition of the sealing bead 62 can improve the sealing reliability of the first sealing ring 6. As shown in FIG.
  • the sealing ribs 62 are provided in two parallel and spaced intervals; of course, in other embodiments, the number of turns of the sealing ribs 62 may be, but is not limited to, 1, 3 or 4, According to the actual needs, you can set it. Further, in the present embodiment, the sealing bead 62 is tapered in the protruding direction, and thus, the free end of the sealing bead 62 is liable to undergo deformation in which the projection 223 is fitted into the upper portion of the coffee filter 4.
  • the sealing between the upper portion of the coffee filter 4 and the cover 22 is disabled, and the upper end of the sealing body 61 preferably along the diameter of the grinding chamber 20.
  • a limit flange 63 is provided for the upper end surface of the coffee filter 4 to resist, and the relative movement between the first seal ring 6 and the coffee filter 4 is restricted.
  • a second sealing ring 7 is disposed between the upper portion of the coffee filter 4 and the upper portion of the cavity 21 to achieve a sealed connection between the upper portion of the coffee filter 4 and the cavity 21;
  • the upper portion of the coffee filter 4 is sealingly coupled to the lid 22 such that the grinding chamber 20 is integrally sealed such that after brewing the coffee, the coffee does not naturally flow out of the beverage outlet 23, requiring a water pump 53 through the hot water supply device 5. Pressurizing the inside of the grinding chamber 20 can discharge the coffee from the beverage outlet 23, thereby achieving the function of pressurizing the extracted coffee, and improving the quality of the coffee.
  • the outer side surface of the upper portion of the coffee filter 4 is provided with a positioning ring groove 40 for setting the second sealing ring 7 to limit the second sealing ring 7 and the coffee filter 4
  • the relative movement between the cavity 21 and the cavity 21 prevents the second sealing ring 7 from sliding into the cavity 21 as a whole, thereby preventing the sealing failure between the upper portion of the coffee filter 4 and the cavity 21.
  • the second seal ring 7 partially protrudes from the positioning ring groove 40 and elastically abuts against the inner side surface of the upper portion of the cavity 21.
  • the coffee filter 4 further includes a screen body 41 disposed on the periphery of the grinding blade set 31, and a fixing frame 42 disposed in a cylindrical shape.
  • the axial lower end of the fixing frame 42 is fixedly connected to the screen body.
  • the axial lower end of the screen body 41 is the lower end of the coffee filter 4
  • the axial upper part of the fixing frame 42 is the upper part of the coffee filter 4, that is, the lower end of the screen body 41 and the grinding chamber 20
  • the bottom wall abuts, and the fixing frame 42 is sealingly connected to the cover 22, and the positioning ring groove 40 is disposed on the outer side of the fixing frame 42.
  • the filter hole of the coffee filter 4 is disposed on the filter body 41, and the fixing frame 42 is used to assist the fixed filter body 41, and the filter frame is not provided with the filter hole.
  • an absolute confined space can be formed between the cylindrical fixing frame 42 and the lid body 22, so that the brewing effect of the coffee is better.
  • the screen body 41 is a metal member to ensure good rigidity of the screen body 41.
  • the screen body 41 has good rigidity and can improve the ability of the screen body 41 to withstand the outward impact of the coffee beans and coffee granules.
  • the screen body 41 is made of a stainless steel material, and the stainless steel material has strong rigidity to better resist the outward impact force of the coffee beans and the coffee particles; of course, in other embodiments, the screen body 41 can also However, it is not limited to being made of other metal materials such as aluminum alloy and titanium alloy.
  • the fixing frame 42 is a plastic piece.
  • the fixing frame 42 can be conveniently fixed to the screen body 41 by injection molding, and the injection molding process is a mature processing process, which is advantageous for batch processing of the coffee filter 4 .
  • the fixing frame 42 is formed by an injection molding process, and the positioning ring groove 40 can be conveniently formed by simply modifying the injection mold used.
  • the fixing frame 42 may also be fixed to the screen body 41 by bonding or welding.
  • the bottom wall of the cavity 21 is preferably provided with a convexity.
  • the table 24 is used for arranging the screen body 41 to realize the positioning of the screen body 41 in the grinding chamber 20.
  • the screen body 41 further includes a first screen body 411 disposed at a periphery of the grinding blade set 31, and a second ring disposed at least at a lower periphery of the first screen body 411.
  • the screen body 412, and the lower ends of the first screen body 411 and the second screen body 412 are abutted against the bottom wall of the grinding chamber 20 to be restrained between the first screen body 411 and the second screen body 412.
  • the secondary filter chamber 203 is located between the grinder chamber 201 and the beverage chamber 202.
  • a screen body 411 enters the secondary filter chamber 203, and the second screen body 412 can also confine the coffee particles in the secondary filter chamber 203, thereby effectively preventing coarser coffee particles from entering the beverage chamber 202 and improving the coffee beverage. quality. It should be noted that, in this embodiment, the boss 24 is sleeved by the first screen body 411.
  • the mesh area of the first screen body 411 is preferably 50 mesh to 120 mesh, and the first screen body 411 of the mesh range has a filter hole of a moderate aperture to be used for brewing coffee. Most of the coffee grounds are confined in the grinder chamber 201.
  • the first screen body 411 can also have a smaller mesh size to reduce the cost of the coffee filter 4.
  • the second screen body 412 preferably has a mesh range of 80 mesh to 150 mesh, and the second mesh body 412 has a fine pore size filter hole on the one hand, and avoids coffee on the one hand.
  • the slag enters the beverage chamber 202 from the secondary filter chamber 203; on the other hand, the rate at which the coffee flows to the beverage chamber 202 is reduced, facilitating the formation of the pressure space within the grinder chamber 201.
  • the second screen body 412 can also have a larger mesh size to increase the restriction on the coffee grounds and to increase the throttling effect of the coffee screen 4.
  • the first screen body 411 is provided with a first reinforcing rib 43 , and the first reinforcing rib 43 includes at least a reinforcing rib ring 43 a disposed along the circumferential direction of the first screen body 411 .
  • the rigidity of the first screen body 411 in the circumferential direction can be further enhanced to resist the outward impact force of the coffee beans and the coffee particles, and the deformation of the first screen body 411 is prevented, thereby extending the life of the coffee filter 4.
  • the first reinforcing rib 43 preferably further includes a reinforcing rib 43b intersecting the rib ring 43a; without loss of generality, the reinforcing rib 43b may be along the The axial direction of the screen body 411 may be inclined to be oblique to the axial direction of the first screen body 411.
  • the upper end of the reinforcing rib 43b is preferably fixedly coupled to the fixing frame 42, so that the rigidity of the first screen body 411 is better ensured.
  • the second screen body 412 is also preferably provided with a second reinforcing rib 44.
  • the first reinforcing rib 43 and the second reinforcing rib 44 are also preferably made of a plastic material.
  • the first reinforcing rib 43 can be conveniently fixed on the first screen body 411 by injection molding.
  • the second reinforcing rib 44 can also be conveniently fixed to the second screen body 412 by injection molding, thereby facilitating batch processing of the coffee screen 4.
  • the fixing frame 42, the first reinforcing ribs 43, and the second reinforcing ribs 44 can be injection molded at one time, and the processing is convenient.
  • FIG 6 is a partial structural view of still another embodiment of the coffee machine of the present invention.
  • the further embodiment is different from the previous embodiment in that a sealing gasket 51 is disposed between the inner end surface of the cover 22 and the upper end surface of the coffee filter 4, so that the coffee filter can also be realized by the sealing gasket 51.
  • the upper portion of the mesh 4 is directly sealed to the cover 22, it being understood that the sealed connection is an axially sealed connection.
  • the embodiment is different from the previous embodiment in that the cavity 21 is provided with an annular step 211 for overlapping the inner end edges of the cover body 22 at the upper portion, and the upper end surface of the coffee filter 4 is higher or flat.
  • the sealing gasket 51 is also disposed between the annular step 211 and the inner side edge of the cover 22, so that the sealing between the cover 22 and the cavity 21 can be simultaneously achieved by the sealing gasket 51.
  • the connection is made to achieve the overall sealing of the grinding chamber 20, so that after the brewing of the coffee, the coffee cannot naturally flow out from the beverage outlet 23, and the water in the grinding chamber 20 needs to be pressurized by the water pump of the hot water supply device, so that the coffee can be discharged from the beverage. 23 discharge, so as to achieve the role of pressurized extraction of coffee, can improve the quality of coffee.
  • the present invention also proposes a coffee preparation method for preparing coffee using the coffee machine of the above embodiment.
  • the coffee preparation method comprises the following steps:
  • Step S1 The grinding knife group grinds the coffee beans put into the grinding bean cavity into coffee powder
  • Step S2 The hot water supply device injects hot water into the grind chamber, and after injecting the preset volume of hot water into the grind chamber, a pressure space is formed above the pressure to brew the coffee liquid in the grind chamber.
  • the grinding blade set has the function of grinding coffee beans and stirring brewed coffee at the same time.
  • the coffee beans can be ground into coffee powder by the motor driven grinding knife group rotating at a high speed.
  • hot water can be injected into the grind chamber through the hot water supply device to brew the coffee. Since the cover seals the upper portion of the grinding chamber, the water inlet rate of the hot water supply device is greater than the water output rate of the coffee filter during the injection of hot water, and the water in the grinding chamber flows over the coffee filter.
  • the filter portion preset volume
  • a pressure space is formed in the upper portion of the coffee filter to pressure the coffee to fully infiltrate the coffee powder, so that the brewed coffee is thicker.
  • the motor can drive the grinding knife group to rotate at a low speed to accelerate the infiltration speed of the coffee powder.
  • the air pressure in the pressure space is greater than or equal to 1 bar and less than or equal to 2 bar to avoid excessive air pressure in the pressure space. It can be understood that the pressure excessively increases the coffee filter network. The rate of water discharge affects the infiltration time of the coffee powder. In addition, in order to obtain an effective pressure brewing effect, the gas pressure in the pressure space cannot be too small, and thus the pressure range in the pressure space is usually limited to 1.3 bar to 1.7 bar.
  • the total area of the filter screen and the number of filter holes of the coffee filter are usually predetermined, so that the throttling effect of the coffee filter is predetermined, in this case,
  • the water inlet rate required for the hot water supply device can be obtained experimentally to make the pressure space have a suitable gas pressure.
  • step S2 the method further includes the steps of:
  • step S3 the hot water supply device injects air into the grind chamber to increase or maintain the air pressure in the pressure space.
  • the hot water supply device does not inject hot water into the grinding bean chamber indefinitely, and the hot water supply device stops the water injection when the amount of hot water injected into the grinding bean chamber by the hot water supply device reaches a preset value.
  • the hot water supply device stops the water injection, the air is continuously injected into the grinding bean chamber through the hot water supply device to increase or The air pressure in the pressure space is maintained, so that the pressure brewing effect of the coffee machine on the coffee liquid can be improved.

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Abstract

一种咖啡机以及咖啡制备方法。咖啡机包括机座（1）、研磨室（2）、研磨装置（3）、咖啡滤网（4）以及热水供应装置（5）。研磨室（2）包括腔体（21）和盖体（22），腔体（21）安装在机座（1）上，盖体（22）封盖腔体（21）形成研磨腔（20），研磨腔（20）的底部设有饮料出口（23）。研磨装置（3）包括设于研磨腔（20）内的研磨刀组（31）、设于研磨腔（20）外用于驱动研磨刀组（31）转动的电机（32）。咖啡滤网（4）环设于研磨刀组（31）外围，且咖啡滤网（4）的下端与研磨腔（20）的底壁相抵接，将研磨腔（20）分隔为磨豆腔（201）和位于磨豆腔（201）外围的饮料腔（202），饮料出口（23）连通饮料腔（202）设置。热水供应装置（5）与研磨腔（20）连通，用以向磨豆腔（201）内供应热水，并在供应热水过程中在磨豆腔（201）内形成压力空间。实现了咖啡的微压冲泡，以冲泡得到更为浓厚的咖啡。

Description

咖啡机以及咖啡制备方法
技术领域
本发明涉及家用电器领域，特别涉及一种咖啡机以及咖啡制备方法。
背景技术
目前，在普通咖啡机中，冲泡腔内设有滤网，冲泡咖啡时，通常先向滤网内投入咖啡粉，再向滤网内冲入热水，以冲泡形成咖啡。可以理解，此种咖啡是在常压下进行冲泡的，如此，咖啡粉难以得到充分的浸润，导致冲泡所得的咖啡不够浓厚。
发明内容
本发明的主要目的是提出一种咖啡机，旨在实现咖啡的微压冲泡，以冲泡得到更为浓厚的咖啡。
为实现上述目的，本发明提出的咖啡机包括：
机座；
研磨室，包括腔体和盖体，所述腔体安装在所述机座上，所述盖体封盖所述腔体形成研磨腔，所述研磨腔的底部设有饮料出口；
研磨装置，包括设于所述研磨腔内的研磨刀组、设于所述研磨腔外用于驱动所述研磨刀组转动的电机；
咖啡滤网，环设于所述研磨刀组外围，且所述咖啡滤网的下端与所述研磨腔的底壁相抵接，将所述研磨腔分隔为磨豆腔和位于所述磨豆腔外围的饮料腔，所述饮料出口连通所述饮料腔设置；以及
热水供应装置，与所述研磨腔连通，用以向所述磨豆腔内供应热水，所述磨豆腔内在注入预设容积的热水后，其上方形成压力空间。
优选地，所述咖啡滤网的上部与所述腔体密封连接，且所述腔体与所述盖体密封连接。
优选地，所述咖啡滤网的上部与所述腔体的上部之间设有第一密封圈。
优选地，所述咖啡滤网上部的外侧面设有供所述第一密封圈套设定位的定位环槽，所述第一密封圈部分突出于所述定位环槽，且弹性抵触于所述腔体上部的内侧面。
优选地，所述盖体的内端面与所述腔体的上端面之间设有第二密封圈。
优选地，所述咖啡滤网的上部与所述盖体密封连接。
优选地，所述咖啡滤网的上部与所述盖体之间通过第一密封圈径向密封连接。
优选地，所述盖体设有伸入所述咖啡滤网上部且呈柱状设置的突起部，所述突起部的外周面与所述咖啡滤网的上部的内周面之间设有所述第一密封圈。
优选地，所述第一密封圈包括呈环状且沿所述研磨腔的轴向方向延伸的密封本体，所述密封本体的外侧面设有呈环形设置的至少一圈密封凸筋，所述密封凸筋弹性抵触于所述咖啡滤网上部的内周面。
优选地，所述密封本体的上端沿所述研磨腔的径向向外方向延伸设有限位翻边，所述咖啡滤网的上端面抵触于所述限位翻边。
优选地，所述咖啡滤网的上部与所述腔体的上部之间设有第二密封圈。
优选地，所述咖啡滤网上部的外侧面设有供所述第二密封圈套设定位的定位环槽，所述第二密封圈部分突出于所述定位环槽，且弹性抵触于所述腔体上部的内侧面。
优选地，所述盖体的内端面与所述咖啡滤网的上端面之间设有密封垫圈。
优选地，所述腔体在上部设有供所述盖体内端面边沿搭接的环形台阶，所述咖啡滤网的上端面高于或平齐于所述环形台阶，所述密封垫圈还垫设在所述环形台阶与所述盖体的内侧面边沿之间。
优选地，所述咖啡滤网为全金属滤网。
优选地，所述全金属滤网的滤孔设在所述全金属滤网的中部和/或下部。
优选地，所述咖啡滤网包括环设于所述研磨刀组外围的滤网本体、以及呈筒状设置的固定框，所述固定框的轴向下端固定连接于所述滤网本体的轴向上端，所述滤网本体的轴向下端为所述咖啡滤网的下端，所述固定框的轴向上部为所述咖啡滤网的上部。
优选地，所述滤网本体为金属件，所述固定框为塑料件，所述固定框通过注塑方式与所述滤网本体固定。
优选地，所述腔体的底壁设有凸台，所述滤网本体套设在所述凸台上，以定位在所述研磨腔内。
优选地，所述咖啡滤网包括环设于所述研磨刀组外围的第一滤网本体、以及至少环设于所述第一滤网本体下部外围的第二滤网本体，且所述第一滤网本体和所述第二滤网本体下端均与所述研磨腔的底壁相抵接，以在所述第一滤网本体与所述第二滤网本体之间限制出位于所述磨豆腔和所述饮料腔之间的二次过滤腔。
优选地，所述热水供应装置包括水箱、连接所述水箱和所述研磨腔的供水管、以及设置在所述供水管上的水泵和加热管。
优选地，所述热水供应装置包括锅炉、连接所述锅炉和所述研磨腔的供水管、以及设置在所述供水管上的水泵。
优选地，所述锅炉内设有温度传感器。
优选地，所述锅炉与所述腔体并排设置。
优选地，所述盖体上设有第一入水口，所述热水供应装置通过所述第一入水口与所述研磨腔连通。
优选地，所述第一入水口设置在所述盖体的下端面，所述腔体的开口端设有沿径向向外延伸的环形台阶，所述环形台阶上设有连通所述热水供应装置和所述第一入水口的第二入水口。
优选地，所述饮料出口设置有出液阀。
优选地，所述出液阀包括阀体，所述阀体的上部设有密封片，所述阀体的下部设有环状凸台，所述环状凸台与所述饮料出口的下端面之间设有弹性件。
优选地，所述腔体与所述机座可拆卸连接。
优选地，所述压力空间内的气压大于或等于1bar且小于或等于2bar。
优选地，所述压力空间内的气压范围为1.3bar~1.7bar。
此外，为实现上述目的，本发明还提出一种咖啡制备方法，该咖啡制备方法所采用的咖啡机包括：
机座；
研磨室，包括腔体和盖体，所述腔体安装在所述机座上，所述盖体封盖所述腔体形成研磨腔，所述研磨腔的底部设有饮料出口；
研磨装置，包括设于所述研磨腔内的研磨刀组、设于所述研磨腔外用于驱动所述研磨刀组转动的电机；
咖啡滤网，环设于所述研磨刀组外围，且所述咖啡滤网的下端与所述研磨腔的底壁相抵接，将所述研磨腔分隔为磨豆腔和位于所述磨豆腔外围的饮料腔，所述饮料出口连通所述饮料腔设置；以及
热水供应装置，与所述研磨腔连通，用以向所述磨豆腔内供应热水；
该咖啡制备方法包括以下步骤：
所述研磨刀组将投入所述磨豆腔内的咖啡豆研磨成咖啡粉；
所述热水供应装置向所述磨豆腔内注入热水，所述磨豆腔内在注入预设容积的热水后，其上方形成压力空间，以对所述磨豆腔内的咖啡液进行压力冲泡。
优选地，所述热水供应装置向所述磨豆腔内注入热水的步骤之后，还包括步骤：
所述热水供应装置向所述磨豆腔内注入空气，以增大或者保持所述压力空间内的气压。
优选地，所述压力空间内的气压范围为1.3bar~1.7bar。
本发明的技术方案中，可通过调节热水供应装置的进水速率，使进水速率大于咖啡滤网的出水速率，当磨豆腔内水漫过咖啡滤网中的滤孔部分时，即可在咖啡滤网内的上部形成一个压力空间，来对咖啡进行微压冲泡，从而充分浸润咖啡粉，以使冲泡出来的咖啡更为浓厚。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本发明咖啡机一实施例的结构示意图；
图2为图1中咖啡机的部分结构示意图；
图3为本发明咖啡机另一实施例的结构示意图；
图4为图3中咖啡机的部分结构示意图；
图5为图4中A处的放大结构示意图；
图6为本发明咖啡机再一实施例的部分结构示意图；其中，咖啡滤网的滤网本体隐藏
图7为本发明咖啡制备方法一实施例的流程示意图。
附图标号说明：
标号 名称 标号 名称
1 机座 2 研磨室
20 研磨腔 21 腔体
22 盖体 23 饮料出口
201 磨豆腔 202 饮料腔
211 环形台阶 212 第二入水口
221 第一入水口 222 出水口
24 凸台 223 突起部
3 研磨装置 31 研磨刀组
32 电机 4 咖啡滤网
203 二次过滤腔 41 滤网本体
42 固定框 43 第一加强筋
44 第二加强筋 411 第一滤网本体
412 第二滤网本体 43a 加强筋环
43b 加强筋条 51 密封垫圈
40 定位环槽 5 热水供应装置
51 锅炉 52 供水管
53 水泵 6 第一密封圈
61 密封本体 62 密封凸筋
63 限位翻边 7 第二密封圈
8 温度传感器 9 出液阀
91 阀体 92 密封片
93 弹性件 911 环状凸台
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明，若本发明实施例中有涉及方向性指示（诸如上、下、左、右、前、后……），则该方向性指示仅用于解释在某一特定姿态（如附图所示）下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本发明实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
本发明提出一种咖啡机。
参照图1，在本发明一实施例中，该咖啡机包括：
机座1；
研磨室2，包括腔体21和盖体22，腔体21安装在机座1上，盖体22封盖腔体21形成研磨腔20，该研磨腔20的底部设有饮料出口23；
研磨装置3，包括设于研磨腔20内的研磨刀组31、设于研磨腔20外用于驱动研磨刀组31转动的电机32；
咖啡滤网4，环设于研磨刀组31外围，且咖啡滤网4的下端与研磨腔20的底壁相抵接，以将研磨腔20分隔为磨豆腔201和位于磨豆腔201外围的饮料腔202，饮料出口23连通饮料腔202设置；
热水供应装置5，与研磨腔20连通，用以向磨豆腔201内供应热水，磨豆腔201内在供入预设容积的热水后，其上方形成压力空间；以及
电控装置（未图示），与研磨装置3和热水供应装置5均电性连接，用以控制研磨装置3和热水供应装置5工作。
本实施例中，预设容积的热水是指能漫过咖啡滤网4的滤孔部分的热水容积；可以理解，由于咖啡滤网4具有一定的节流作用，通过热水供应装置5快速注入预设容积的热水，而使热水漫过咖啡滤网4的滤孔部分之后，咖啡滤网4外部的热水水位会低于咖啡滤网4内的水位，此时，继续快速注入热水，可在咖啡滤网4内的上部形成所述压力空间。
在本实施例的技术方案中，可通过调节热水供应装置5的进水速率，使进水速率大于咖啡滤网4的出水速率，当磨豆腔内水漫过咖啡滤网4的滤孔部分时，即可在咖啡滤网4内的上部形成所述压力空间，来对咖啡进行微压冲泡，从而充分浸润咖啡粉，以使冲泡出来的咖啡更为浓厚。需要说明的是，本实施例中，在热水供应装置5向磨豆腔201内注入的热水量达到预设值之后，还可继续通过热水供应装置5向磨豆腔201内注入空气，以增大或者保持所述压力空间内的气压，从而实现对咖啡液的持续微压冲泡。
本实施例中，进一步地，所述压力空间内的气压大于或等于1bar且小于或等于2bar，以避免所述压力空间内的气压过大，可以理解，压力过大会快速增大咖啡滤网4的出水速率，影响咖啡粉的浸润时间。另外，为获得有效的微压冲泡效果，所述压力空间内的气压不能过小，如此，所述压力空间内的气压范围通常限制在1.3bar~1.7bar。需要说明的是，对于确定型号的所述咖啡机，咖啡滤网4的设有滤孔的总面积和滤孔目数通常是既定的，从而咖啡滤网4的节流作用是既定的，此情况下，可通过实验获得热水供应装置5所需的进水速率，来使得所述压力空间具有合适的气压。
在本实施例中，进一步地，咖啡滤网4的上部与腔体21密封连接，且腔体21与盖体22密封连接，如此，盖体22可间接密封咖啡滤网4的上部，从而实现盖体22对磨豆腔201上部的密封。然本设计不限于此，于其他实施例中，还可通过咖啡滤网4上部与盖体22的直接密封连接，来实现盖体22对磨豆腔201上部的密封。
一并参照图2，本实施例中，具体地，咖啡滤网4的上部与腔体21的上部之间设有第一密封圈6，如此，咖啡滤网4的上部可通过该第一密封圈6实现与腔体21之间的密封连接。然本设计不限于此，于其他实施例中，咖啡滤网4的上部还可与腔体21的上部通过螺旋密封结构实现密封连接。进一步地，咖啡滤网4上部的外侧面设有定位环槽40，该定位环槽40用以供第一密封圈6套设定位，以限制第一密封圈6与咖啡滤网4和腔体21之间的相对运动，从而避免第一密封圈6整体滑入腔体21内，进而避免咖啡滤网4上部与腔体21之间的密封失效。不失一般性，第一密封圈6部分突出于定位环槽40，且弹性抵触于腔体21上部的内侧面。
另外，本实施例中，盖体22的内端面与腔体21的上端面之间优选设有第二密封圈7，如此，盖体22可通过该第二密封圈7实现与腔体21之间的密封连接。类似地，本设计不限于此，于其他实施例中，盖体22与腔体21之间还可通过螺旋密封结构实现密封连接。
参照图2，在本实施例中，进一步地，咖啡滤网4为全金属滤网，即是说，咖啡滤网4整体由金属材料所制成，例如但不限于通过压铸工艺或者钣金工艺进行加工形成，如此，咖啡滤网4可具有更为良好的的整体刚性，可提高咖啡滤网4对咖啡豆和咖啡颗粒向外冲击力的承受能力。优选地，咖啡滤网4由不锈钢材料所制成，不锈钢材料具有强刚性，可更好地抵抗咖啡豆和咖啡颗粒的向外冲击力；当然，于其他实施例中，咖啡滤网4还可但不限于由铝合金、钛合金等其他金属材料所制成。在咖啡滤网4为全金属滤网时，该全金属滤网的滤孔优选仅设置在全金属滤网的中部和/或下部，也就是说，全金属滤网的上部未设置滤孔，如此，在热水漫过全金属滤网的中部后，在全金属滤网的上部与盖体22之间可形成绝对的密闭空间，从而使得咖啡的微压冲泡效果更好。
然本设计不限于此，于其他实施例中，咖啡滤网4还可包括环设于研磨刀组31外围的滤网本体、以及呈筒状设置的固定框，该固定框的轴向下端固定连接于滤网本体的轴向上端，滤网本体的轴向下端为所述咖啡滤网4的下端，所述固定框的轴向上部为所述咖啡滤网4的上部；其中，滤网本体为金属件，以保证滤网本体的刚性良好，固定框则为塑料件，如此，固定框可方便地通过注塑方式与滤网本体固定，注塑工艺为成熟的加工工艺，有利于该咖啡滤网4的批量加工制造；需要说明的是，此时，咖啡滤网4的滤孔设在滤网本体上，固定框是用来辅助固定滤网本体的，固定框上未设有滤孔，如此，在热水漫过滤网本体后，在呈筒状的固定框与盖体22之间可形成绝对的密闭空间，从而使得咖啡的冲泡效果更好。
参照图1，进一步地，热水供应装置5包括锅炉51、连接锅炉51和研磨腔20的供水管52、以及设置在供水管52上的水泵53。本实施例中，锅炉51具有储水空间，并用以将储水空间内的水加热成热水，以供水泵53通过供水管52注入磨豆腔201内。需要说明的是，本实施例中，该水泵53还具有向磨豆腔201注入空气的作用。然本设计不限于此，于其他实施例中，热水供应装置5可包括水箱、连接水箱和研磨腔20的供水管、以及设置在供水管上的水泵和加热管，加热管可将供水管内的水加热成热水，以使得通过水泵注入磨豆腔201内的水为热水。
本实施例中，为提高电控装置的智能性，锅炉51内优选设有温度传感器8，可以理解，该温度传感器8与电控装置电连接，以使得电控装置可获取锅炉51内水的温度，并在实际水温达到预设水温时，才控制水泵53将预设水温的热水注入磨豆腔201内，从而使得冲泡所得的咖啡温度适当，口感更好。另外，本实施例中，锅炉51优选与腔体21并排设置，以避免咖啡机的整体高度过高。
参照图1和图2，本实施例中，盖体22上设有第一入水口221，热水供应装置5通过该第一入水口221与研磨腔20连通，如此，可通过适当调整盖体22上出水口222的位置，即可方便地将热水注入磨豆腔201内。然本设计不限于此，于其他实施例中，热水供应装置5也可通过腔体21直接与研磨腔20连通，即是说，将入水口开设在腔体21的侧壁上。进一步地，第一入水口221设置在盖体22的下端面，腔体21的开口端则设有沿径向向外延伸的环形台阶211，该环形台阶211上设有连通热水供应装置5和第一入水口221的第二入水口212，如此，相较于将第一入水口221直接设置在盖体22的面向锅炉51的侧面上的技术方案，本技术方案可使得研磨室2与锅炉51之间的间距更小，从而使得咖啡机的整体结构更为紧凑，体积更小。
在本实施例中，进一步地，腔体21与机座1可拆卸连接，如此，当需要清洗研磨室2时，能将研磨室2从机座1上拆卸下来，从而方便地对研磨室2进行全方位的清洗。
参照图2，本实施例中，饮料出口23优选设置有出液阀9，在将研磨室2从机座1上拆卸下来后，该出液阀9可封闭饮料出口23，以避免腔体21内的咖啡残液从饮料出口23流到桌面或者地上。具体地，该出液阀9包括阀体91，该阀体91的上部设有密封片92，该阀体91的下部则设有环状凸台911，该环状凸台911与饮料出口23的下端面之间设有弹性件（93）93；如此，当阀体91的下端受到向上的顶起力时，弹性件（93）93会缩短，而使阀体91带着密封片92上移而打开饮料出口23，从而使得咖啡液可从饮料出口23流出，而当阀体91所受到的顶起力消失（例如将研磨室2从机座1上拆下后），弹性件（93）93会伸长，而使阀体91带着密封片92下移而封闭饮料出口23，从而避免咖啡残液从饮料出口23流出。不失一般性，本实施例中，该弹性件（93）93为压缩弹簧；当然，于其他实施例中，该弹性件（93）93还可但不限于为弹性套筒等。另外，还需要说明的是，于其他实施例中，出液阀9还可为其他结构的控制阀，只要能实现饮料出口23的打开和封闭即可。
参照图3，图3为本发明咖啡机另一实施例的结构示意图。该另一实施例与前述实施例的不同之处在于，咖啡滤网4的上部与盖体22密封连接，以通过调节热水供应装置5的进水速率，使进水速率大于咖啡滤网4的出水速率，当水漫过咖啡滤网4中的滤孔部分时，即可在咖啡滤网4内的上部形成所述压力空间，来对咖啡进行微压冲泡，从而充分浸润咖啡粉，以使冲泡出来的咖啡更为浓厚。
一并参照图4，在本实施例中，进一步地，咖啡滤网4的上部与盖体22通过第一密封圈6径向密封连接。具体地，盖体22设有伸入咖啡滤网4上部且呈柱状设置的突起部223，该突起部223的外周面与咖啡滤网4的上部的内周面之间设有第一密封圈6，如此，咖啡滤网4的上部可通过该第一密封圈6实现与盖体22的直接密封连接。然本设计不限于此，于其他实施例中，所述突起部223还可与咖啡滤网4的上部通过螺旋密封结构实现密封连接。另外，于再一些其他实施例中，盖体22的内端面还可设置突出的套筒，咖啡滤网4上部的外周面与套筒的内周面密封连接，或者咖啡滤网4上部的内周面与套筒的外周面密封连接。
一并参照图5，本实施例中，具体地，第一密封圈6包括呈环状且沿研磨腔20的轴向方向延伸的密封本体61，该密封本体61的内侧面贴设于所述突出部的外周面，外侧面则设有呈环形设置的至少一圈密封凸筋62，该密封凸筋62弹性抵触于咖啡滤网4上部的内周面。可以理解，密封凸筋62的增设可提高第一密封圈6的密封可靠性。如图5，本实施例中，密封凸筋62并行且间隔地设有两圈；当然，于其他实施例中，密封凸筋62的圈数还可但不限于为1、3或4等，根据实际需要具体设置即可。另外，本实施例中，密封凸筋62在凸设方向上呈锥形设置，如此，密封凸筋62的自由端易于发生利于突起部223装配入咖啡滤网4上部的形变。
本实施例中，为避免第一密封圈6整体滑入咖啡滤网4内，而使得咖啡滤网4上部与盖体22之间的密封失效，密封本体61的上端优选沿研磨腔20的径向向外方向延伸设有限位翻边63，该限位翻边63用以供咖啡滤网4的上端面抵触，而限制第一密封圈6与咖啡滤网4之间的相对运动。
在本实施例中，进一步地，咖啡滤网4的上部与腔体21的上部之间设有第二密封圈7，以实现咖啡滤网4的上部与腔体21之间的密封连接；又咖啡滤网4的上部与盖体22密封连接，从而使得研磨腔20是整体密封的，如此，在酿造好咖啡后，咖啡不能从饮料出口23自然流出，需要通过热水供应装置5的水泵53向研磨腔20内加压，才能将咖啡从饮料出口23排出，从而达到增压萃取咖啡的作用，能提高咖啡的品质。本实施例中，咖啡滤网4上部的外侧面设有定位环槽40，该定位环槽40用以供第二密封圈7套设定位，以限制第二密封圈7与咖啡滤网4和腔体21之间的相对运动，从而避免第二密封圈7整体滑入腔体21内，进而避免咖啡滤网4上部与腔体21之间的密封失效。不失一般性，第二密封圈7部分突出于定位环槽40，且弹性抵触于腔体21上部的内侧面。
参照图4，进一步地，咖啡滤网4包括环设于研磨刀组31外围的滤网本体41、以及呈筒状设置的固定框42，该固定框42的轴向下端固定连接于滤网本体41的轴向上端。本实施例中，滤网本体41的轴向下端为咖啡滤网4的下端，固定框42的轴向上部为咖啡滤网4的上部，即是说，滤网本体41的下端与研磨腔20的底壁相抵接，固定框42与盖体22密封连接，所述定位环槽40设置在固定框42的外侧面。可以理解，咖啡滤网4的滤孔设在滤网本体41上，固定框42则用来辅助固定滤网本体41，固定框42上未设有滤孔，如此，在热水漫过滤网本体41后，在呈筒状的固定框42与盖体22之间可形成绝对的密闭空间，从而使得咖啡的冲泡效果更好。
在本实施例中，具体地，滤网本体41为金属件，以保证滤网本体41的刚性良好。特别地，滤网本体41具有良好的刚性，可提高滤网本体41对咖啡豆和咖啡颗粒向外冲击力的承受能力。优选地，滤网本体41由不锈钢材料所制成，不锈钢材料具有强刚性，可更好地抵抗咖啡豆和咖啡颗粒的向外冲击力；当然，于其他实施例中，滤网本体41还可但不限于由铝合金、钛合金等其他金属材料所制成。固定框42为塑料件，如此，固定框42可方便地通过注塑方式与滤网本体41固定，注塑工艺为成熟的加工工艺，有利于该咖啡滤网4的批量加工制造。另外，通过注塑工艺形成固定框42，只需简单修改所使用的注塑模具，即可方便地形成所述定位环槽40。当然，于其他实施例中，该固定框42还可以是通过粘接或焊接的方式与滤网本体41固定的。
另外，本实施例中，为避免在咖啡机工作的过程中，滤网本体41在研磨腔20内出现晃动，甚至出现与研磨刀组31碰撞的现象，腔体21的底壁优选设有凸台24，该凸台24用以供滤网本体41套设，而实现滤网本体41在研磨腔20内的定位。
参照图4，在本实施例中，进一步地，滤网本体41包括环设于研磨刀组31外围的第一滤网本体411、以及至少环设于第一滤网本体411下部外围的第二滤网本体412，且第一滤网本体411和第二滤网本体412下端均与研磨腔20的底壁相抵接，以在第一滤网本体411与第二滤网本体412之间限制出位于磨豆腔201和饮料腔202之间的二次过滤腔203，如此，在研磨刀组31研磨咖啡豆或者搅拌咖啡的过程中，即使有较粗的咖啡颗粒在离心力的作用下冲过第一滤网本体411进入二次过滤腔203，第二滤网本体412也可将这些咖啡颗粒限制在二次过滤腔203中，从而有效避免较粗的咖啡颗粒进入饮料腔202，提高咖啡饮料的品质。需要说明的是，本实施例中，所述凸台24是供第一滤网本体411套设的。
在本实施例中，第一滤网本体411的目数范围优选为50目~120目，该目数范围下的第一滤网本体411具有适中孔径的滤孔，以在冲泡咖啡时，将大部分咖啡渣限制在磨豆腔201中。当然，在其他实施例中，第一滤网本体411还可具有更小的目数，以降低咖啡滤网4的成本。另外，本实施例中，第二滤网本体412的目数范围优选为80目~150目，该目数范围下的第二滤网本体412具有较细孔径的滤孔，一方面可避免咖啡渣从二次过滤腔203进入饮料腔202；另一方面可降低咖啡流向饮料腔202的速率，便于磨豆腔201内所述压力空间的形成。当然，在其他实施例中，第二滤网本体412还可具有更大的目数，以提高对咖啡渣的限制作用、以及提高咖啡滤网4的节流作用。
一并参照图6，进一步地，第一滤网本体411上设有第一加强筋43，该第一加强筋43至少包括沿第一滤网本体411的周向设置的加强筋环43a，由此，可进一步增强第一滤网本体411在周向上的刚性，以抵抗咖啡豆和咖啡颗粒的向外冲击力，避免第一滤网本体411变形，从而延长咖啡滤网4的寿命。另外，为进一步提高第一滤网本体411的整体刚性，该第一加强筋43优选还包括与加强筋环43a相交的加强筋条43b；不失一般性，该加强筋条43b可以是沿第一滤网本体411的轴向方向延伸的，也可以是与第一滤网本体411的轴向方向倾斜设置的。特别地，该加强筋条43b的上端优选与固定框42固定连接，从而使得第一滤网本体411的刚性有更好的保证。
类似地，为增强第二滤网本体412的整体刚性，第二滤网本体412上也优选设有第二加强筋44。需要说明的是，本实施例中，第一加强筋43和第二加强筋44也优选为塑料材质，如此，第一加强筋43可方便地通过注塑方式固定在第一滤网本体411上，第二加强筋44也可方便地通过注塑方式固定在第二滤网本体412上，从而有利于该咖啡滤网4的批量加工制造。特别地，固定框42、第一加强筋43和第二加强筋44可一次性注塑成型，加工过程实为方便。
参照图6，图6为本发明咖啡机再一实施例的部分结构示意图。该再一实施例与上一实施例的不同之处在于，盖体22的内端面与咖啡滤网4的上端面之间设有密封垫圈51，如此，通过该密封垫圈51亦可实现咖啡滤网4上部与盖体22的直接密封连接，可以理解，此密封连接为轴向密封连接。
进一步地，本实施例与上一实施例的不同之处还在于，腔体21在上部设有供盖体22内端面边沿搭接的环形台阶211，咖啡滤网4的上端面高于或平齐于环形台阶211，所述密封垫圈51还垫设在环形台阶211与盖体22的内侧面边沿之间，如此，通过该密封垫圈51可同时实现盖体22与腔体21之间的密封连接，从而实现研磨腔20的整体密封，如此，在酿造好咖啡后，咖啡不能从饮料出口23自然流出，需要通过热水供应装置的水泵向研磨腔20内加压，才能将咖啡从饮料出口23排出，从而达到增压萃取咖啡的作用，能提高咖啡的品质。
本发明还提出一种咖啡制备方法，该咖啡制备方法采用上述实施例的咖啡机进行咖啡制备。
参照图7，在本发明一实施例中，该咖啡制备方法包括以下步骤：
步骤S1、研磨刀组将投入磨豆腔内的咖啡豆研磨成咖啡粉；
步骤S2、热水供应装置向磨豆腔内注入热水，磨豆腔内在注入预设容积的热水后，其上方形成压力空间，以对磨豆腔内的咖啡液进行压力冲泡。
本实施例中，研磨刀组同时具有研磨咖啡豆和搅拌冲泡咖啡的功能。在将咖啡豆投入磨豆腔内后，可通过电机驱动研磨刀组高速旋转，而将咖啡豆研磨成咖啡粉。此后，可通过热水供应装置向磨豆腔内注入热水，来冲泡咖啡。由于盖体密封磨豆腔的上部，因此可在注入热水的过程中，使热水供应装置的进水速率大于咖啡滤网的出水速率，且当磨豆腔内水漫过咖啡滤网中的滤孔部分（预设容积）时，在咖啡滤网内的上部形成压力空间，来对咖啡进行压力冲泡，从而充分浸润咖啡粉，以使冲泡出来的咖啡更为浓厚。需要说明的是，在冲泡咖啡的过程中，可通过电机驱动研磨刀组低速旋转，来加快咖啡粉的浸润速度。
本实施例中，进一步地，所述压力空间内的气压大于或等于1bar且小于或等于2bar，以避免所述压力空间内的气压过大，可以理解，压力过大会快速增大咖啡滤网的出水速率，影响咖啡粉的浸润时间。另外，为获得有效的压力冲泡效果，所述压力空间内的气压不能过小，如此，所述压力空间内的气压范围通常限制在1.3bar~1.7bar。需要说明的是，对于确定型号的所述咖啡机，咖啡滤网的设有滤孔的总面积和滤孔目数通常是既定的，从而咖啡滤网的节流作用是既定的，此情况下，可通过实验获得热水供应装置所需的进水速率，来使得所述压力空间具有合适的气压。
在本实施例中，进一步的，在步骤S2之后，还包括步骤：
步骤S3，热水供应装置向磨豆腔内注入空气，以增大或者保持压力空间内的气压。
可以理解，热水供应装置不会无限地向磨豆腔内注入热水，当热水供应装置向磨豆腔内所注入的热水量达到预设值之后，热水供应装置将停止注水。此时，为延长咖啡机对咖啡液的压力冲泡时间，本实施例中，在热水供应装置将停止注水之后，还继续通过热水供应装置向磨豆腔内注入空气，以增大或者保持所述压力空间内的气压，如此，可提升咖啡机对咖啡液的压力冲泡效果。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。

Claims (34)

  1. 一种咖啡机，其特征在于，包括：
    机座；
    研磨室，包括腔体和盖体，所述腔体安装在所述机座上，所述盖体封盖所述腔体形成研磨腔，所述研磨腔的底部设有饮料出口；
    研磨装置，包括设于所述研磨腔内的研磨刀组、设于所述研磨腔外用于驱动所述研磨刀组转动的电机；
    咖啡滤网，环设于所述研磨刀组外围，且所述咖啡滤网的下端与所述研磨腔的底壁相抵接，将所述研磨腔分隔为磨豆腔和位于所述磨豆腔外围的饮料腔，所述饮料出口连通所述饮料腔设置；以及
    热水供应装置，与所述研磨腔连通，用以向所述磨豆腔内供应热水，所述磨豆腔内在供入预设容积的热水后，其上方形成压力空间。
  2. 如权利要求1所述的咖啡机，其特征在于，所述咖啡滤网的上部与所述腔体密封连接，且所述腔体与所述盖体密封连接。
  3. 如权利要求2所述的咖啡机，其特征在于，所述咖啡滤网的上部与所述腔体的上部之间设有第一密封圈。
  4. 如权利要求3所述的咖啡机，其特征在于，所述咖啡滤网上部的外侧面设有供所述第一密封圈套设定位的定位环槽，所述第一密封圈部分突出于所述定位环槽，且弹性抵触于所述腔体上部的内侧面。
  5. 如权利要求2所述的咖啡机，其特征在于，所述盖体的内端面与所述腔体的上端面之间设有第二密封圈。
  6. 如权利要求1所述的咖啡机，其特征在于，所述咖啡滤网的上部与所述盖体密封连接。
  7. 如权利要求6所述的咖啡机，其特征在于，所述咖啡滤网的上部与所述盖体之间通过第一密封圈径向密封连接。
  8. 如权利要求7所述的咖啡机，其特征在于，所述盖体设有伸入所述咖啡滤网上部且呈柱状设置的突起部，所述突起部的外周面与所述咖啡滤网的上部的内周面之间设有所述第一密封圈。
  9. 如权利要求8所述的咖啡机，其特征在于，所述第一密封圈包括呈环状且沿所述研磨腔的轴向方向延伸的密封本体，所述密封本体的外侧面设有呈环形设置的至少一圈密封凸筋，所述密封凸筋弹性抵触于所述咖啡滤网上部的内周面。
  10. 如权利要求9所述的咖啡机，其特征在于，所述密封本体的上端沿所述研磨腔的径向向外方向延伸设有限位翻边，所述咖啡滤网的上端面抵触于所述限位翻边。
  11. 如权利要求7所述的咖啡机，其特征在于，所述咖啡滤网的上部与所述腔体的上部之间设有第二密封圈。
  12. 如权利要求11所述的咖啡机，其特征在于，所述咖啡滤网上部的外侧面设有供所述第二密封圈套设定位的定位环槽，所述第二密封圈部分突出于所述定位环槽，且弹性抵触于所述腔体上部的内侧面。
  13. 如权利要求6所述的咖啡机，其特征在于，所述盖体的内端面与所述咖啡滤网的上端面之间设有密封垫圈。
  14. 如权利要求13所述的咖啡机，其特征在于，所述腔体在上部设有供所述盖体内端面边沿搭接的环形台阶，所述咖啡滤网的上端面高于或平齐于所述环形台阶，所述密封垫圈还垫设在所述环形台阶与所述盖体的内侧面边沿之间。
  15. 如权利要求1所述的咖啡机，其特征在于，所述咖啡滤网为全金属滤网。
  16. 如权利要求15所述的咖啡机，其特征在于，所述全金属滤网的滤孔设在所述全金属滤网的中部和/或下部。
  17. 如权利要求1所述的咖啡机，其特征在于，所述咖啡滤网包括环设于所述研磨刀组外围的滤网本体、以及呈筒状设置的固定框，所述固定框的轴向下端固定连接于所述滤网本体的轴向上端，所述滤网本体的轴向下端为所述咖啡滤网的下端，所述固定框的轴向上部为所述咖啡滤网的上部。
  18. 如权利要求17所述的咖啡机，其特征在于，所述滤网本体为金属件，所述固定框为塑料件，所述固定框通过注塑方式与所述滤网本体固定。
  19. 如权利要求17所述的咖啡机，其特征在于，所述腔体的底壁设有凸台，所述滤网本体套设在所述凸台上，以定位在所述研磨腔内。
  20. 如权利要求1所述的咖啡机，其特征在于，所述咖啡滤网包括环设于所述研磨刀组外围的第一滤网本体、以及至少环设于所述第一滤网本体下部外围的第二滤网本体，且所述第一滤网本体和所述第二滤网本体下端均与所述研磨腔的底壁相抵接，以在所述第一滤网本体与所述第二滤网本体之间限制出位于所述磨豆腔和所述饮料腔之间的二次过滤腔。
  21. 如权利要求1所述的咖啡机，其特征在于，所述热水供应装置包括水箱、连接所述水箱和所述研磨腔的供水管、以及设置在所述供水管上的水泵和加热管。
  22. 如权利要求1所述的咖啡机，其特征在于，所述热水供应装置包括锅炉、连接所述锅炉和所述研磨腔的供水管、以及设置在所述供水管上的水泵。
  23. 如权利要求22所述的咖啡机，其特征在于，所述锅炉内设有温度传感器。
  24. 如权利要求22所述的咖啡机，其特征在于，所述锅炉与所述腔体并排设置。
  25. 如权利要求1所述的咖啡机，其特征在于，所述盖体上设有第一入水口，所述热水供应装置通过所述第一入水口与所述研磨腔连通。
  26. 如权利要求25所述的咖啡机，其特征在于，所述第一入水口设置在所述盖体的下端面，所述腔体的开口端设有沿径向向外延伸的环形台阶，所述环形台阶上设有连通所述热水供应装置和所述第一入水口的第二入水口。
  27. 如权利要求1所述的咖啡机，其特征在于，所述饮料出口设置有出液阀。
  28. 如权利要求27所述的咖啡机，其特征在于，所述出液阀包括阀体，所述阀体的上部设有密封片，所述阀体的下部设有环状凸台，所述环状凸台与所述饮料出口的下端面之间设有弹性件。
  29. 如权利要求1所述的咖啡机，其特征在于，所述腔体与所述机座可拆卸连接。
  30. 如权利要求1所述的咖啡机，其特征在于，所述压力空间内的气压大于或等于1bar且小于或等于2bar。
  31. 如权利要求30所述的咖啡机，其特征在于，所述压力空间内的气压范围为1.3bar~1.7bar。
  32. 一种咖啡制备方法，其特征在于，所述咖啡制备方法咖啡机进行咖啡制备，所述咖啡机包括：
    机座；
    研磨室，包括腔体和盖体，所述腔体安装在所述机座上，所述盖体封盖所述腔体形成研磨腔，所述研磨腔的底部设有饮料出口；
    研磨装置，包括设于所述研磨腔内的研磨刀组、设于所述研磨腔外用于驱动所述研磨刀组转动的电机；
    咖啡滤网，环设于所述研磨刀组外围，且所述咖啡滤网的下端与所述研磨腔的底壁相抵接，将所述研磨腔分隔为磨豆腔和位于所述磨豆腔外围的饮料腔，所述饮料出口连通所述饮料腔设置；以及
    热水供应装置，与所述研磨腔连通；
    所述咖啡制备方法包括以下步骤：
    所述研磨刀组将投入所述磨豆腔内的咖啡豆研磨成咖啡粉；
    所述热水供应装置向所述磨豆腔内注入热水，所述磨豆腔内在注入预设容积的热水后，其上方形成压力空间，以对所述磨豆腔内的咖啡液进行压力冲泡。
  33. 如权利要求32所述的咖啡制备方法，其特征在于，所述热水供应装置向所述磨豆腔内注入热水的步骤之后，还包括步骤：
    所述热水供应装置向所述磨豆腔内注入空气，以增大或者保持所述压力空间内的气压。
  34. 如权利要求32所述的咖啡制备方法，其特征在于，所述压力空间内的气压范围为1.3bar~1.7bar。
PCT/CN2017/074249 2016-09-14 2017-02-21 咖啡机以及咖啡制备方法 Ceased WO2018049789A1 (zh)

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