Coffee extraction device and extraction method

Abstract

The coffee extraction device comprises a main machine and a brewing mechanism connected to the main machine, a grinding mechanism is arranged in the main machine, and coffee beans entering a grinding cavity are ground into powder through a grinding cutter; the powder pressing mechanism is located above the brewing mechanism and reciprocates along the Z axis under the action of a first driving component; a water supply mechanism; the powder pressing mechanism further comprises a powder pressing device, and the powder pressing device and the brewing mechanism are combined to form a powder pressing channel capable of containing a powder pressing assembly. The powder pressing assembly is movably arranged in the powder pressing device and reciprocates along the powder pressing channel; the powder pressing assembly has a powder pressing stroke and a reset stroke in opposite directions in the powder pressing channel; a sensing device is arranged on the side portion of the powder pressing channel, electrically connected with a circuit system in the main machine and used for sensing the position of the powder pressing assembly and activating when sensing that the powder pressing assembly is in the reset stroke so as to switch on the circuit system in the main machine and supply water to the brewing mechanism.

Description

Technical Field

[0001] This invention relates to the field of coffee machine technology, and more particularly to a coffee extraction device and extraction method. Background Technology

[0002] With the continuous advancement of social productivity and the increasing pursuit of quality of life, instant coffee can no longer satisfy consumers' higher demands for rich flavors and complex tastes. Against this backdrop, various coffee-making equipment has emerged, among which espresso machines, employing steam-pressurized rapid extraction technology, are particularly noteworthy. Espresso machines, with their superior extraction capabilities, can fully release the aroma and flavor of coffee beans, bringing coffee lovers the ultimate drinking experience. Today, fully automatic espresso machines, with their efficient and convenient operation, have become indispensable coffee preparation tools in modern homes and businesses, not only satisfying people's pursuit of high-quality coffee but also reflecting how technological progress enhances the quality of daily life.

[0003] Most coffee machines on the market currently use a tamping hammer to press coffee grounds, making the brewing process cumbersome and resulting in a poor user experience. Coffee machines with automatic tamping are rare. For example, Chinese patent application CN 111568188A discloses an automatic tamping coffee machine, including a main body with a downward-facing brewing spout on which a coffee filter can be mounted. The brewing spout is connected to the outlet of an electrically controlled three-way valve via a brewing tube. One inlet of this valve is connected to the hot water chamber inside the main body via a water inlet pipe, and the other inlet is connected to air via an air inlet pipe. This automatic tamping coffee machine connects the brewing tube to air through the air inlet pipe. Air is delivered through the brewing tube to the coffee grounds in the coffee filter, compacting the coffee grounds. Simultaneously, a booster pump continuously increases the air pressure in the brewing tube until a set pressure is reached, ensuring the coffee grounds achieve the required compaction.

[0004] However, the filter of such coffee machines usually needs to be removed from the machine for cleaning after use and then reinstalled for the next use. If the coffee machine is started without the filter installed, coffee grounds may fall outside the machine or high-temperature steam may be blown out directly, causing injury to the user. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, the present invention provides a coffee extraction apparatus and extraction method.

[0006] The above-mentioned problems of the present invention are solved by the following technical solutions: A coffee extraction device includes a main unit and a brewing mechanism detachably connected to the main unit, wherein the main unit contains... A grinding mechanism having a grinding chamber, wherein a grinding blade grinds coffee beans into powder inside the grinding chamber; The tamping mechanism includes a tamping assembly located above the brewing mechanism and reciprocating along the Z-axis under the action of the first driving component to tamp the coffee powder in the brewing mechanism. A water supply mechanism, comprising a water tank and a heating element, wherein the heating element heats the water in the water tank and injects it into the brewing mechanism for coffee extraction; The powder pressing mechanism also includes a powder pressing device, which, together with the brewing mechanism, forms a powder pressing channel capable of accommodating the powder pressing component; the powder pressing component is movably disposed within the powder pressing device and reciprocates along the powder pressing channel. The powder pressing assembly has a powder pressing stroke and a reset stroke in opposite directions within the powder pressing channel; A sensing device is provided on the side of the powder pressing channel. The sensing device is electrically connected to the circuit system inside the main unit. It is used to sense the position of the powder pressing component and is activated when the powder pressing component is in the reset stroke to connect the circuit system of the water supply mechanism inside the main unit and supply water to the brewing mechanism. The grinding mechanism and the brewing mechanism are connected by a powder feeding pipe. The powder pressing device has a powder inlet groove on its side, and the powder outlet end of the powder feeding pipe is connected to the powder inlet groove. The powder feeding tube is equipped with a powder leveling mechanism.

[0007] By adopting the above technical solution, and through sensing devices and program settings, water supply is activated only when the powder is reset, ensuring precise connection between powder pressing and extraction.

[0008] A further setting of the above technical solution is: the sensing device is a Hall element mounted on the side of the powder pressing channel via a bracket, and the powder pressing assembly is provided with a magnet sensed by the Hall element; The magnet moves synchronously with the powder pressing assembly.

[0009] A further setting of the above technical solution is: the powder pressing assembly includes a powder pressing hammer with a water outlet, a transmission sleeve is connected above the powder pressing hammer, the transmission sleeve extends to the outside of the powder pressing device and is connected to the first driving component in a transmission manner; The bracket is fixed to the upper end of the powder pressing device and is located on the side of the transmission sleeve.

[0010] A further provision of the above technical solution is that the outer periphery of the transmission sleeve is provided with a threaded area, and the threaded area and the first driving component are connected by a gear transmission assembly.

[0011] A further provision of the above technical solution is that the powder-leveling mechanism includes a powder-leveling component and a dehumidification component; The powder mixing component stirs or drives the airflow inside the powder supply tube to make the coffee powder enter the brewing mechanism evenly and in a loose powder form. The dehumidification unit dries the inside of the powder dispensing tube to keep the coffee powder in a loose state during dispensing.

[0012] By adopting the above technical solution, the coffee powder delivery tube is equipped with a powder leveling mechanism to ensure that the coffee powder enters the brewing mechanism loosely and evenly, avoiding clumping and improving the uniformity of extraction.

[0013] A further provision of the above technical solution is that the powder mixing component is a fan blade extending into the powder supply tube, and the fan blade is driven by the second driving component to rotate in the powder supply tube to stir the coffee powder.

[0014] A further provision of the above technical solution is that the powder-leveling component is a fan, and the air outlet of the fan is connected to the powder-feeding pipe to drive the coffee powder in the powder-feeding pipe with airflow so that the coffee powder is uniform.

[0015] A further provision of the above technical solution is that: a detection device is provided on the tamping device to detect whether the brewing mechanism is installed; the detection device is connected to the circuit system inside the coffee machine body to control the opening and closing of the coffee machine.

[0016] By adopting the above technical solution, the detection device (contact head + micro switch) ensures that the whole machine cannot be started when the brewing mechanism is not installed, thus avoiding the leakage of hot water or steam that could scald the user.

[0017] A further provision of the above technical solution is that the detection device includes a contact head movably disposed on the side wall of the powder pressing device, and a micro switch disposed at the tail of the contact head; When the contact head is squeezed out axially by the brewing mechanism, the micro switch is activated. The contact head is provided with an elastic component, which gives the contact head a tendency to move toward the powder pressing channel.

[0018] The present invention also discloses an extraction method applied to the above-mentioned coffee extraction apparatus, comprising the following steps: S1. Install the brewing mechanism onto the main unit and connect it to the tamping mechanism, put in coffee beans, and input the power-on command; S2. The circuit system performs a self-test, checks the detection device on the powder pressing mechanism, and confirms that the brewing mechanism has been installed in place; at the same time, it checks that the sensing device on the powder pressing mechanism is in the initial state; and ensures that the safety mechanism of the circuit system is in the conductive state. S3. The circuit system self-test is completed. The grinding mechanism and the powder leveling mechanism are started to grind the coffee beans into powder. At the same time, the powder leveling component of the powder leveling mechanism drives the airflow in the powder supply tube, and the dehumidification component of the powder leveling mechanism dehumidifies the powder supply tube to ensure that the coffee powder is evenly distributed when it enters the brewing mechanism through the powder supply tube. S4. The grinding mechanism finishes grinding, the powder pressing mechanism starts, the first driving component drives the powder pressing assembly into the powder pressing stroke, and the powder pressing assembly moves downward along the powder pressing channel; S5. During the powder pressing stroke, the sensing device senses the powder pressing component once but does not activate it, and the powder pressing component continues to perform the powder pressing action. S6. After the powder pressing is completed, the first drive component drives the powder pressing assembly into the reset stroke; the sensing device is activated after sensing the powder pressing assembly again, and the water supply mechanism is started. S7. The tamping assembly stops resetting, and the water supply mechanism supplies water to the brewing mechanism through the tamping assembly to extract the coffee liquid. S8. Water supply is completed, the water supply mechanism stops, and the powder pressing component continues to move upward and reset.

[0019] Compared with existing technologies, the beneficial effects of this invention are as follows: by integrating innovative designs such as automatic tamping, even powder drying, safety protection, and intelligent control, it solves the problems of cumbersome operation, uneven powder distribution, and safety hazards of traditional coffee machines, significantly improving the convenience, stability, and flavor quality of coffee extraction, and is especially suitable for the high-efficiency needs of home and commercial scenarios; and through sensing devices and program settings, water supply is activated only when tamping is reset, ensuring precise connection between tamping and extraction, and guaranteeing the taste of the extracted coffee. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0022] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the bean storage bin.

[0024] Figure 5 This is a cross-sectional schematic diagram of the powder pressing mechanism.

[0025] Figure 6 This is a schematic diagram of the exploded structure of the powder pressing mechanism.

[0026] Figure 7 This is a top view of the powder pressing mechanism.

[0027] Figure 8This is a cross-sectional schematic diagram of the grinding mechanism and the powder pressing mechanism.

[0028] Figure 9 This is a schematic diagram of the connection structure between the grinding mechanism and the powder supply pipe.

[0029] Figure 10 This is a cross-sectional schematic diagram of the fan installed on the powder discharge pipe.

[0030] Figure 11 This is a schematic diagram showing the exploded structure of the heating component on the powder lowering pipe.

[0031] Figure 12 This is a schematic diagram of the cross-sectional structure of the powder discharge pipe.

[0032] Figure 13 This is a schematic diagram showing the exploded structure of the powder pressing mechanism and the brewing mechanism.

[0033] Figure 14 This is a lateral layout diagram of the detection device.

[0034] Figure 15 This is a schematic diagram of the detection device.

[0035] Figure 16 This is a cross-sectional schematic diagram of the detection device and the brewing mechanism.

[0036] Figure 17 This is a schematic diagram of the contact head inside the powder pressing mechanism.

[0037] Figure 18 This is a schematic diagram of the internal structure of the powder pressing device.

[0038] The attached diagram is labeled as follows: 1. Main unit; 1.1. Control panel; 2. Brewing mechanism; 2.1. Protrusion; 3. Grinding mechanism; 4. Powder pressing mechanism; 4.1. First drive component; 4.3. Gear transmission assembly; 4.31. Output gear; 5. Water supply mechanism; 5.1. Water tank; 5.2. Heating component; 4.2. Powder pressing channel; 6. Sensing device; 7. Sensing component; 8. Activation component; 9. Magnet; 10. Support; 11. Second drive component; 12. Fan blade; 13. Fan; 14. Heating element; 14.1. Limiting groove; 15. Foaming mechanism; 110. Grinding blade; 101. Grinding chamber; 200. Powder pressing assembly; 2 10. Powder pressing hammer; 220. Transmission sleeve; 221. Guide groove; 300. Powder pressing device; 301. Powder inlet trough; 310. Guide part; 320. Water injection head; 302. Clearance groove; 330. Suspension platform; 303. Notch; 331. Inlet surface; 332. Suspension surface; 333. Stop surface; 400. Powder outlet pipe; 401. Mounting groove; 410. Limiting protrusion; 500. Bean hopper; 510. Bean cover; 520. hopper body; 600. Detection device; 610. Contact head; 620. Micro switch; 630. Elastic component; 621. Activation key; 640. Mounting bracket; 611. Top holding protrusion; 612. Pressing surface; Detailed Implementation

[0039] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0040] like Figure 1-18 As shown, this embodiment discloses a coffee extraction device.

[0041] It includes a main unit 1 and a brewing mechanism 2 detachably connected to the main unit 1, wherein the main unit 1 contains, The grinding mechanism 3 has a grinding chamber 101, and the grinding blade 110 grinds the coffee beans that enter the grinding chamber 101 into powder. The tamping mechanism 4 includes a tamping component 200, which is located above the brewing mechanism 2 and reciprocates along the Z-axis under the action of the first driving component 4.1 to tamp the coffee powder in the brewing mechanism 2. The water supply mechanism 5 includes a water tank 5.1 and a heating element 5.2. The heating element 5.2 heats the water in the water tank 5.1 and then injects it into the brewing mechanism 2 to extract coffee liquid. The powder pressing mechanism 4 also includes a powder pressing device 300, which, together with the brewing mechanism 2, forms a powder pressing channel 4.2 capable of accommodating the powder pressing component 200; the powder pressing component 200 is movably disposed within the powder pressing device 300 and reciprocates along the powder pressing channel 4.2. The powder pressing assembly 200 has a powder pressing stroke and a reset stroke in opposite directions within the powder pressing channel 4.2; A sensing device 6 is provided on the side of the powder pressing channel 4.2. The sensing device 6 is electrically connected to the circuit system inside the host 1. It is used to sense the position of the powder pressing component 200 and is activated when the powder pressing component 200 is sensed to be in the reset stroke, so as to connect the circuit system of the water supply mechanism 5 inside the host 1 and supply water to the brewing mechanism 2. The grinding mechanism 3 and the brewing mechanism 2 are connected by a powder feeding pipe 400. The powder pressing device 300 has a powder inlet groove 301 on its side, and the powder outlet end of the powder feeding pipe 400 is connected to the powder inlet groove 301. A powder leveling mechanism is provided on the powder feeding tube 400.

[0042] The above is the basic scheme of this embodiment.

[0043] Reference Figures 1-3 As shown, during use, the brewing mechanism 2 is installed on the main unit 1, and coffee beans are placed into the grinding chamber 101 of the grinding mechanism 3 through the bean inlet. Upon powering on, the grinding blades 110 of the grinding mechanism 3 activate, grinding the coffee beans in the grinding chamber 101 into powder. The coffee powder falls through the powder outlet 400 into the brewing mechanism 2. The tamping mechanism 4 activates, and the tamping assembly 200 descends, pressing the coffee powder in the brewing mechanism 2 to form a uniform coffee cake.

[0044] After tamping, the tamping assembly 200 returns to its original position and rises. The water supply mechanism 5 is activated, heating the water in the water tank 5.1 to form steam, which is then injected into the brewing mechanism 2. The steam comes into contact with the coffee powder to extract the coffee liquid. The extracted concentrate is then output through the outlet on the brewing mechanism 2 to the coffee cup below the brewing mechanism 2, thus completing the preparation of the concentrate.

[0045] The main unit 1 is equipped with a control panel 1.1 for consumers to operate.

[0046] In this embodiment, the host 1 is also provided with a foaming mechanism 15, and the brewing mechanism 2 is a conventional powder bowl with a handle in the prior art, and the bottom of the powder bowl is provided with a liquid outlet.

[0047] In this embodiment, the powder pressing device 300 is hollow with openings at both the top and bottom. The lower end of the powder pressing device 300 and the brewing mechanism 2 combine to form a powder pressing channel 4.2 that can accommodate the movement of the powder pressing assembly 200. Under the action of the first driving component 4.1, the powder pressing assembly 200 reciprocates along the powder pressing channel 4.2 in the Z-axis direction.

[0048] When the tamping assembly 200 moves downward, it enters the tamping stroke, pressing the loose coffee powder into a compact puck; after tamping is completed, the first drive component 4.1 drives the tamping assembly 200 upward to enter the reset stroke.

[0049] During the resetting process of the powder pressing assembly 200, the water supply mechanism 5 supplies water to the brewing device. To ensure the extraction effect, a certain space needs to be left between the powder pressing assembly 200 and the powder cake for extraction. To ensure that the water supply mechanism 5 supplies water to the brewing device 2 only after the powder pressing assembly 200 rises to the set position, in this embodiment, a sensing device 6 is provided on the side of the powder pressing channel 4.2. The sensing device 6 is electrically connected to the circuit system in the host 1. The position of the powder pressing assembly 200 is sensed by the sensing device 6, thereby controlling the water output time of the water supply mechanism 5.

[0050] Furthermore, in this embodiment, through program settings, the sensing device 6 can only be activated by the powder pressing component 200 during the reset stroke. That is, during the powder pressing stroke, when the powder pressing component 200 passes the sensing device 6, the sensing device 6 senses the powder pressing component 200 but is not activated; when the powder pressing component 200 passes the sensing device 6 during the reset stroke, the sensing device 6 is activated, connecting the circuit of the water supply mechanism 5 in the circuit system, so that the water supply mechanism 5 supplies water to the brewing mechanism 2.

[0051] In this embodiment, a bean hopper 500 is provided inside the host 1. The upper port of the bean hopper 500 extends to the top of the host 1 and is covered by a bean cover 510. The lower port of the bean hopper 500 is connected to the grinding chamber 101 of the grinding mechanism 3.

[0052] Specific reference Figure 3 and Figure 4 As shown, the internal space of the bean hopper 500 is set in a funnel shape, and a sensing component 7 is provided at the bottom of the bean hopper 500. An activation component 8 is provided on the bean lid 510 in conjunction with the sensing component 7. When the bean lid 510 is closed to the upper port of the bean hopper 500, the sensing component 7 senses the activation component 8 and activates it, so that the circuit system in the host 1 can be started.

[0053] Preferably, the sensing component 7 is a Hall element, and the activating component 8 is a magnet 9 that can be sensed by the Hall element.

[0054] To ensure that the coffee powder entering the brewing unit 2 is in a loose powder state, and to avoid the coffee powder clumping and unevenness inside the coffee cake, in this embodiment, a powder leveling mechanism is provided in the powder feeding tube 400. As the coffee powder falls along the powder feeding tube 400, the powder leveling mechanism processes the coffee powder to make it loose, thereby ensuring that the coffee powder falling into the brewing unit 2 is also loose.

[0055] Specifically, the sensing device 6 is a Hall element located on the side of the powder pressing channel 4.2 via the bracket 10, and the powder pressing assembly 200 is provided with a magnet 9 that is sensed by the Hall element; The magnet 9 moves synchronously with the powder pressing assembly 200.

[0056] Specific reference Figure 5 As shown, the sensing device 6 is disposed on the side of the powder pressing channel 4.2, preferably on the outer wall of the powder pressing device 300, with the detection surface facing the powder pressing channel 4.2. The magnet 9 is embedded in the outer periphery of the powder pressing assembly 200 and is located at the position corresponding to the sensing device 6.

[0057] When the powder pressing assembly 200 moves under the action of the first driving component 4.1, it drives the magnet 9 to move synchronously. As a result, when it passes the sensing surface of the sensing device 6, the sensing device 6 senses the magnet 9, thereby confirming the position of the powder pressing assembly 200.

[0058] Specifically, the powder pressing assembly 200 includes a powder pressing hammer 210 with a water outlet, and a transmission sleeve 220 is connected above the powder pressing hammer 210. The transmission sleeve 220 extends to the outside of the powder pressing device 300 and is connected to the first driving component 4.1 in a transmission manner. The bracket 10 fixes the upper end of the powder pressing device 300 and is located on the side of the transmission sleeve 220.

[0059] Specific reference Figure 5 and Figure 6 As shown, the bracket 10 is fixed to the top of the powder pressing device 300 with screws, and the sensing device 6 is embedded in the side of the bracket 10; the upper opening of the powder pressing device 300 allows the transmission sleeve 220 to extend out, and the powder pressing hammer 210 is located at the lower end of the transmission sleeve 220 and is always located below the opening of the powder pressing device 300.

[0060] The transmission sleeve 220 has an axial guide groove 221 on its side. The part of the bracket 10 that is equipped with the sensing device 6 can enter the guide groove 221. When the transmission sleeve 220 moves axially under the action of the first driving component 4.1, the sensing device 6 slides along the guide groove 221.

[0061] Meanwhile, the magnet 9 is set on the inner wall of the transmission sleeve 220 and located inside the guide groove 221. That is to say, the sensing device 6 and the magnet 9 are separated only by the bottom of the guide groove 221, and the interval is short, so that the sensing device 6 can sense the magnet 9 inside.

[0062] During the grinding process, the pressing hammer 210 is in the initial position, and at this time the magnet 9 is above the sensing device 6, that is, the sensing device 6 is in an inactive state.

[0063] After grinding is completed, the circuit system controls the first drive component 4.1 to run, driving the grinding hammer 210 to move downward. During the movement, the magnet 9 passes the position of the sensing device 6 for the first time. At this time, the sensing device 6 is still in an inactive state.

[0064] As the tamping process ends, the first drive component 4.1 moves the tamping hammer 210 upward, and the magnet 9 on the transmission sleeve 220 gradually approaches the sensing device 6. When the magnet 9 passes the position of the sensing device 6 for the second time, the sensing device 6 is activated, and at the same time, the tamping hammer 210 reaches the brewing position. At this time, the water supply circuit in the circuit system is turned on, instructing the water supply mechanism 5 to start, supplying water to the brewing mechanism 2 to extract the coffee liquid.

[0065] It should be noted that in this embodiment, the activation mode of the sensing device 6 is set by the program settings. During the powder pressing stroke, the circuit where the sensing device 6 is located is not activated. At this time, the Hall element will not be activated when the magnet 9 passes the position of the sensing device 6. Only during the reset stroke is the circuit where the sensing device 6 is located turned on. At this time, the sensing device 6 is activated when the magnet 9 passes the position of the sensing device 6. After the extraction is completed or the sensing device 6 has been activated once, the circuit where the sensing device 6 is located is turned off again.

[0066] In this embodiment, the outer periphery of the transmission sleeve 220 is provided with a threaded area, and the threaded area and the first driving component 4.1 are connected by a gear transmission assembly 4.3.

[0067] Specific reference Figure 6 and Figure 7 As shown, the transmission sleeve 220 is provided with two guide grooves 221, one of which is used to accommodate the sensing device 6, and the other cooperates with the guide part 310 of the opening of the powder pressing device 300 to constrain the circumferential movement of the transmission sleeve 220.

[0068] The portion of the transmission sleeve 220 extending above the powder pressing device 300 meshes with the gear rotating assembly. The output shaft of the first drive component 4.1 drives the gear transmission assembly 4.3, and the output gear 4.31 in the gear transmission assembly 4.3 rotates. Since the circumferential movement of the transmission sleeve 220 is constrained, the transmission sleeve 220 can only move axially, driving the powder pressing hammer 210 to rise and fall within the powder pressing channel 4.2.

[0069] Preferably, in this embodiment, the output gear 4.31 has a ring structure and has an internal thread and an external tooth. The external tooth meshes with the other gears of the gear transmission assembly 4.3, and the internal thread meshes with the thread of the transmission sleeve 220.

[0070] In this embodiment, a water injection head 320 is provided on the powder pressing hammer 210. The water injection head 320 is connected to the water supply mechanism 5, and hot water is injected into the brewing mechanism 2 through the powder pressing hammer 210.

[0071] When the coffee powder ground by the grinding mechanism 3 falls into the brewing mechanism 2 through the powder outlet pipe 400, the bottom of the grinding mechanism 3 is connected to the powder outlet pipe 400. During dispensing, the coffee powder falls along the inclined powder outlet channel under the action of gravity. The coffee powder needs a certain weight to slide down the dispensing channel. Therefore, when the amount of coffee powder is small, it will accumulate at the inlet of the dispensing channel. It can only be dispensed after accumulating to a certain extent. When the coffee powder that has accumulated into clumps falls into the funnel, it is not in a uniform powder state, which makes the powder distribution in the funnel uneven. The powder cake formed after tamping is also uneven. When extracting coffee liquid, the areas with denser coffee powder cannot be fully extracted. Therefore, in this embodiment, a powder leveling mechanism is provided on the powder outlet pipe 400 to make the coffee powder fall in a uniform powder state.

[0072] The specific implementation of the powder-mixing mechanism is as follows: the powder-mixing mechanism includes a powder-mixing component and a dehumidification component; The powder mixing component stirs or drives the airflow inside the powder supply tube 400 to make the coffee powder enter the brewing mechanism 2 evenly and in a loose powder form. The dehumidification component dries the inside of the powder feeding tube 400 to keep the coffee powder in a loose state during feeding.

[0073] Specific reference Figure 8 As shown, after the coffee beans are ground into powder in the grinding mechanism 3, they are fed into the powder along the inclined powder feeding tube 400. During the powder feeding process, the powder leveling mechanism is activated to level the coffee powder that has accumulated into clumps, so that the coffee powder is fed into the powder in a loose and uniform state. When the loose coffee powder falls into the brewing mechanism 2, it is also in a loose state. In this way, when the tamper 210 tamps the coffee powder, it can be pressed evenly.

[0074] The powder leveling component is driven by a drive unit, which is electrically connected to the circuit system inside the main unit 1. It starts at the same time as the grinding mechanism 3 or starts slightly later. When there is coffee powder in the powder tube 400, the powder leveling component has already started, thus enabling complete powder leveling of the coffee powder.

[0075] Specifically, the powder mixing component is a fan blade 12 that extends into the powder feeding tube 400. The fan blade 12 is driven by the second driving component 11 and rotates within the powder feeding tube 400 to stir the coffee powder.

[0076] In this embodiment, the blades of the fan blade 12 extend into the powder supply tube 400 and can rotate within the powder supply tube 400; at the same time, the output shaft of the second drive component 11 is connected to the fan blade 12. To ensure the electrical connection structure of the second drive component 11, the second drive component 11 is fixed to the outside of the powder supply tube 400, while only the output shaft extends into the powder supply tube 400.

[0077] The fan blade 12 is driven to rotate by the second drive component 11, which stirs the coffee powder that comes into contact with the blade, thus making the coffee powder loose.

[0078] Preferably, in this embodiment, the second driving component 11 is a drive motor.

[0079] Preferably, in this embodiment, the blades of the fan blade 12 can be perpendicular to its axis of rotation or parallel to the axis of rotation, and the number of blades can also be varied.

[0080] Furthermore, in this embodiment, the rotation axis of the fan blade 12 is perpendicular to the direction of the powder discharge pipe 400.

[0081] To ensure even powder distribution, in this embodiment, the fan blade 12 is positioned near the powder inlet of the powder inlet pipe 400.

[0082] When the coffee powder gathers to a certain amount at the powder outlet of the grinding mechanism 3, it enters the powder outlet tube 400 due to gravity. As soon as it enters the powder outlet tube 400, it comes into contact with the fan blade 12 and is dispersed by the fan blade 12, forming scattered powder that continues to fall along the powder outlet tube 400. During the continued fall, since different coffee powder particles have different speeds and directions of movement after being dispersed, a messy powder mist is formed in the powder outlet tube 400, so that when the coffee powder falls into the brewing mechanism 2, it forms a looser powder.

[0083] In another embodiment, the powder leveling component is a fan 13, the air outlet of which is connected to the powder feeding pipe 400 to drive the coffee powder in the powder feeding pipe 400 with airflow to make the coffee powder uniform.

[0084] Specific reference Figure 9 and Figure 10As shown, the air outlet of the blower 13 is connected to the wall of the powder discharge pipe 400, and outputs airflow downward into the powder discharge pipe 400. The airflow breaks up the clumps of coffee powder and forms a loose powder mist in the powder discharge pipe 400 for powder discharge.

[0085] Preferably, in this embodiment, the output direction of the airflow in the fan 13 is set at an angle to the direction of coffee powder dispensing in the powder dispensing channel.

[0086] In this embodiment, the air outlet of the fan 13 is located at the part of the powder discharge pipe 400 near the powder outlet.

[0087] Based on the above settings, not only can the coffee powder in the powder delivery tube 400 be dispersed and evenly distributed, but a small amount of airflow can also enter the tamping channel 4.2 to drive the coffee powder falling into the tamping channel 4.2, thereby ensuring that the coffee powder can fall evenly into the brewing mechanism 2, so as to achieve the purpose of even powder distribution.

[0088] It should be noted that the fan and blower 13 can be set simultaneously or separately.

[0089] In this embodiment, the dehumidification component includes a heating element 14 disposed on the outer wall of the powder discharge pipe 400, and the heating element 14 heats the pipe wall of the powder discharge pipe 400.

[0090] Preferred, refer to Figure 11 and Figure 12 As shown, in this embodiment, the heating element 14 is located near the outlet of the powder supply pipe 400 and on the lower end face of the powder supply pipe 400.

[0091] As coffee powder falls along the feed tube 400, it typically contacts the inner bottom surface of the feed tube 400 due to gravity and falls along the inner bottom surface. Therefore, in this embodiment, the heating element 14 heats the lower end surface of the feed tube 400, transferring heat to the bottom surface of the feed tube 400 through the bottom of the feed tube 400 to ensure that the bottom surface of the feed tube 400 is dry. At the same time, it can heat the coffee powder in contact with the bottom surface of the feed tube 400, drying the moisture in the coffee powder and further improving the dryness of the coffee powder.

[0092] In order to ensure the heat conduction efficiency of the powder discharge tube 400 and the installation stability of the heating element 14, the outer wall of the powder discharge tube 400 is provided with an installation groove 401 that can accommodate the heating element 14.

[0093] The shape of the mounting slot 401 matches the shape of the heating element 14.

[0094] Based on the above configuration, an installation groove 401 is provided in the outer wall of the powder supply tube 400, which reduces the thickness of the powder supply tube 400 in the heating part, so that the heat of the heating element 14 can be conducted into the powder supply tube 400 more quickly; at the same time, the installation groove 401 limits the heating element 14 to ensure that the heating element 14 will not come out of the installation position, resulting in drying failure.

[0095] Preferably, in this embodiment, a limiting protrusion 410 is provided on the groove wall of the mounting groove 401 extending toward the groove.

[0096] In this embodiment, the limiting protrusion 410 is a protrusion 2.1, and the heating element 14 is provided with a limiting groove 14.1 that cooperates with the limiting protrusion 410, so that the heating element 14 will not rotate in the mounting groove 401, and the wires on the heating element 14 will not be loosely connected.

[0097] In other embodiments, other limiting structures may be provided in the mounting slot 401 to ensure the position of the heating element 14.

[0098] Preferably, in this embodiment, the heating element 14 is a ceramic heating plate.

[0099] The ceramic heating element contains a heating wire. When energized, the heating wire generates heat and transfers the heat to the external ceramic heating element, thereby causing the ceramic heating element to heat up.

[0100] In addition, to ensure the safety of the brewing mechanism 2, the water supply mechanism 5 will not start when the brewing mechanism 2 is not installed, to avoid the risk of scalding the user with hot water. In this embodiment, a detection device 600 is provided on the tamping device 300 to detect whether the brewing mechanism 2 is installed; the detection device 600 is connected to the circuit system inside the coffee machine body to control the start and stop of the coffee machine.

[0101] In this embodiment, a detection device 600 is provided in the tamping device 300 and is located in the installation position close to the brewing mechanism 2. When the brewing mechanism 2 is not installed in the installation position, the detection device 600 transmits an idle signal to the circuit system in the host 1, and the host 1 cannot be started. That is to say, the grinding mechanism 3, the tamping mechanism 4 and the water supply mechanism 5 cannot be started, thereby ensuring that there is no coffee powder output in the tamping mechanism 4, and that the tamping hammer 210 will not move, and that high-temperature steam will not be injected into the tamping mechanism 4, thus ensuring the safety of consumers and the brewing protection of the coffee machine.

[0102] Specific reference Figure 13 As shown, in order to ensure the detection effect of the detection device 600, the lower end opening of the powder pressing device 300 forms a powder outlet, and an installation part that can be connected to the brewing mechanism 2 is formed along the periphery of the powder outlet; the detection device 600 is located outside the installation part, and the detection head extends into the inside of the installation part.

[0103] The brewing device is connected to the lower end of the tamping device 300. The air outlet at the lower end of the tamping device 300 is blocked. The coffee powder ground in the grinding mechanism 3 enters the tamping device 300 along the powder feeding tube 400 and enters the brewing mechanism 2 from the powder outlet. The installation part is an annular structure surrounding the powder outlet at the lower end of the compressed powder. The brewing mechanism 2 is installed in the inner ring of the annular structure. The detection device 600 is located outside the annular structure, and the detection head extends into the interior of the annular structure through the clearance hole on the annular structure, so that the end of the detection head can sense or contact the brewing mechanism 2.

[0104] Specifically, the detection device 600 includes a contact head 610 movably disposed on the side wall of the powder pressing device 300, and a micro switch 620 disposed at the tail of the contact head 610. The detection head is the head of the contact head 610. When the contact head 610 is squeezed out axially by the brewing mechanism 2, the micro switch 620 is activated. The contact head 610 is provided with an elastic member 630, which causes the contact head 610 to tend to move toward the powder pressing channel 4.2.

[0105] Reference Figures 14-15 As shown, the contact head 610 moves axially, and its head is squeezed out by the brewing mechanism 2, so that its tail contacts the micro switch 620 and presses the activation key 621 on the micro switch 620, thereby activating the micro switch 620.

[0106] A mounting bracket 640 is fixed to the side of the powder pressing device 300. The mounting bracket 640 is provided with a movable channel. The contact head 610 is movably disposed in the movable channel and moves axially within the movable channel to achieve the action of approaching the brewing mechanism 2 and moving away from the brewing mechanism 2.

[0107] The micro switch 620 is fixed at the tail of the mounting bracket 640 and close to the tail of the contact head 610. When the contact head 610 is away from the brewing mechanism 2, it can contact the micro switch 620 and press the activation button 621 of the micro switch 620.

[0108] When the brewing mechanism 2 is disassembled from the mounting position, the contact head 610 needs to automatically reset and extend into the mounting position, and its tail is separated from the micro switch 620. Therefore, the contact head 610 is provided with an elastic member 630, which makes the contact head 610 tend to move toward the brewing mechanism 2.

[0109] Preferably, in this embodiment, the elastic component 630 is a spring, which is sleeved on the contact head 610 and located within the movable channel of the mounting bracket 640. A supporting protrusion 611 is provided on the contact head 610 near its head. The front end of the spring supports the supporting protrusion 611, and the rear end supports the mounting bracket 640. In this embodiment, the lower end of the micro switch 620 is positioned below the highest point of the movable channel, and the tail end of the spring extends behind the movable channel to support the micro switch 620, thereby giving the contact head 610 a tendency to move away from the micro switch 620.

[0110] Preferably, in this embodiment, the micro switch 620 is disposed below the contact head 610, and the activation key 621 is located on the upper end surface of the micro switch 620; in order for the contact head 610 to press the activation key 621 downward, in this embodiment a pressing surface 612 is provided at the tail of the contact head 610. The pressing surface 612 is an inclined surface, and the thickness near the end is less than the thickness away from the end.

[0111] In other words, as the contact head 610 moves away from the brewing mechanism 2, the pressing surface 612 gradually approaches the activation key 621. Due to the effect of the inclined pressing surface 612, the closer the contact head 610 gets to the micro switch 620, the greater the pressing force of its pressing surface 612 on the activation key 621, so as to ensure the activation effect of the micro switch 620.

[0112] When the brewing mechanism 2 is removed from the installation position, the contact head 610 moves toward the brewing mechanism 2 under the action of the elastic member 630, and the pressing surface 612 quickly separates from the activation key 621, ensuring that the micro switch 620 can be quickly disconnected.

[0113] Preferably, in this embodiment, the head of the contact head 610 is set as an arc surface to reduce the contact between it and other components during movement.

[0114] In this embodiment, the mounting part is a plurality of suspension platforms 330 formed in the inner ring of the powder pressing device 300, and the upper end surface of the suspension platform 330 can suspend the outer edge of the brewing mechanism 2. The contact head 610 can extend above the suspension platform 330.

[0115] Specific reference Figure 17 and Figure 18As shown, the suspension platform 330 is a rib protruding from the inner wall of the powder pressing device 300 and is arranged in the circumferential direction; a notch 303 is formed between two adjacent suspension platforms 330 to accommodate the suspension part of the brewing device. The brewing mechanism 2 extends upward from the lower end of the powder outlet into the powder pressing device 300. By rotating the brewing mechanism 2, the suspension part slides along the upper end surface of the suspension platform 330 until the suspension part can be completely rotated into the upper end surface of the suspension platform 330.

[0116] When the brewing mechanism 2 moves onto the suspension platform 330, the contact head 610, which was originally located above the suspension platform 330, is driven by the suspension part, the powder pressing device 300 is disengaged, and the micro switch 620 is activated.

[0117] Preferably, in this embodiment, the upper end surface of the suspension platform 330 is sequentially configured as an inclined inlet surface 331 and a horizontal suspension surface 332 along the screwing direction of the brewing mechanism 2.

[0118] The starting position of the inlet surface 331 is lower than the ending position, so that the brewing mechanism 2 continues to move upward a small distance during rotation, ensuring the connection between the brewing mechanism 2 and the powder pressing device 300.

[0119] In this embodiment, the suspension part is a protrusion 2.1 protruding from the outer surface of the brewing mechanism 2, and the suspension part is provided with an inclined surface that cooperates with the guide surface 331.

[0120] When the brewing mechanism 2 rotates to the installation position, the suspension part needs to be limited to prevent it from continuing to rotate. In this embodiment, the suspension platform 330 is set as an L-shaped structure, and a vertical stop surface 333 is formed at the end of the suspension surface 332.

[0121] The vertical protrusion 2.1 of the L-shaped structure is located above the suspension surface 332.

[0122] Example 2 This embodiment discloses an extraction method applied to the coffee extraction apparatus of Embodiment 1, comprising the following steps: S1. Install the brewing mechanism 2 onto the main unit 1 and connect it to the tamping mechanism 4. Put in coffee beans and input the start command. S2. The circuit system performs a self-test to ensure that the safety mechanism of the circuit system is in the conductive state. S3. The circuit system self-test is completed. The grinding mechanism 3 and the powder mixing mechanism are started to grind the coffee beans into powder. At the same time, the powder mixing component of the powder mixing mechanism drives the airflow in the powder supply tube 400, and the dehumidification component of the powder mixing mechanism dehumidifies the powder supply tube 400 to ensure that the coffee powder is evenly dispersed when it enters the brewing mechanism 2 through the powder supply tube 400. S4. After the grinding mechanism 3 finishes grinding, the powder pressing mechanism 4 starts. The first driving component 4.1 drives the powder pressing assembly 200 into the powder pressing stroke, and the powder pressing assembly 200 moves downward along the powder pressing channel 4.2. S5. During the powder pressing stroke, the sensing device 6 senses the powder pressing assembly 200 once but does not activate it, and the powder pressing assembly 200 continues to perform the powder pressing action. S6. After the powder pressing is completed, the first drive component 4.1 drives the powder pressing assembly 200 into the reset stroke; the sensing device 6 is activated after sensing the powder pressing assembly 200 again, and the water supply mechanism 5 is started. S7. The tamping assembly 200 stops resetting, and the water supply mechanism 5 supplies water to the brewing mechanism 2 through the tamping assembly 200 to extract coffee liquid. S8. Water supply is completed, water supply mechanism 5 stops, and powder pressing component 200 continues to move upward and reset.

[0123] In step S2, the circuit system performs a self-test, checks the sensing component 7 on the bean hopper 500 to confirm that the bean lid 510 is closed; checks the detection device 600 on the powder pressing mechanism 4 to confirm that the brewing mechanism 2 is installed in place; at the same time, it checks that the sensing device 6 on the powder pressing mechanism 4 is in its initial state.

[0124] In step S3, the grinding mechanism 3 can be started simultaneously with the powder mixing mechanism, or the powder mixing mechanism can be started slightly later. When the grinding mechanism 3 just starts grinding the beans, a small amount of coffee powder cannot be directly added. Only after a certain amount is reached can the powder be added.

[0125] In steps S4 and S5, the tamping assembly 200 is activated only after receiving the signal that grinding is complete. During its downward movement along the powder feeding channel, it passes the sensing device 6 for the first time. At this time, the sensing device 6 can sense the tamping assembly 200, but it is not activated. After passing the position of the sensing device 6, the tamping assembly 200 continues to move downward to tamp the coffee powder in the brewing mechanism 2. In step S6, the powder pressing component 200 moves down to the set position and stops, then moves up to the reset stroke. When it passes the sensing device 6, the sensing device 6 senses that the position of the powder pressing component 200 is activated, and connects the circuit of the water supply mechanism 5. At the same time, the water supply mechanism 5 is started. In step S7, the water supply mechanism 5 injects water into the brewing mechanism 2 through the water inlet head 320 on the tamping assembly 200, and the brewing mechanism 2 extracts coffee liquid.

[0126] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A coffee extraction device, comprising a main unit (1) and a brewing mechanism (2) detachably connected to the main unit (1), wherein the main unit (1) contains, The grinding mechanism (3) has a grinding chamber (101) and a grinding blade (110) grinds coffee beans into powder in the grinding chamber (101). The tamping mechanism (4) includes a tamping component (200), which is located above the brewing mechanism (2) and reciprocates along the Z-axis under the action of the first driving component (4.1) to tamp the coffee powder in the brewing mechanism (2). The water supply mechanism (5) includes a water tank (5.1) and a heating element (5.2). The heating element (5.2) heats the water in the water tank (5.1) and injects it into the brewing mechanism (2) to extract coffee liquid. Its features are: The powder pressing mechanism (4) further includes a powder pressing device (300), which and the brewing mechanism (2) are combined to form a powder pressing channel (4.2) that can accommodate the powder pressing component (200); the powder pressing component (200) is movably disposed in the powder pressing device (300) and reciprocates along the powder pressing channel (4.2); The powder pressing assembly (200) has a powder pressing stroke and a reset stroke in opposite directions within the powder pressing channel (4.2); A sensing device (6) is provided on the side of the powder pressing channel (4.2). The sensing device (6) is electrically connected to the circuit system inside the host (1). The sensing device (6) is used to sense the position of the powder pressing assembly (200) and is activated when the powder pressing assembly (200) is in the reset stroke, so as to connect the circuit system of the water supply mechanism (5) inside the host (1) to supply water to the brewing mechanism (2). The grinding mechanism (3) and the brewing mechanism (2) are connected by a powder feeding pipe (400). The powder pressing device (300) has a powder inlet groove (301) on its side, and the powder outlet end of the powder feeding pipe (400) is connected to the powder inlet groove (301). A powder leveling mechanism is provided on the powder feeding tube (400).

2. The coffee extraction apparatus according to claim 1, characterized in that: The sensing device (6) is a Hall element located on the side of the powder pressing channel (4.2) via a bracket (10), and the powder pressing assembly (200) is provided with a magnet (9) that is sensed by the Hall element; The magnet (9) moves synchronously with the powder pressing assembly (200).

3. The coffee extraction apparatus according to claim 2, characterized in that: The powder pressing assembly (200) includes a powder pressing hammer (210) with a water outlet. A transmission sleeve (220) is connected above the powder pressing hammer (210). The transmission sleeve (220) extends to the outside of the powder pressing device (300) and is connected to the first driving component (4.1) in a transmission manner. The bracket (10) is fixed to the upper end of the powder pressing device (300) and is located on the side of the transmission sleeve (220).

4. The coffee extraction apparatus according to claim 3, characterized in that: The outer periphery of the transmission sleeve (220) is provided with a threaded area, and the threaded area and the first driving component (4.1) are connected by a gear transmission assembly (4.3).

5. The coffee extraction apparatus according to claim 1, characterized in that: The powder-mixing mechanism includes a powder-mixing component and a dehumidification component; The powder mixing component stirs or drives the airflow inside the powder supply tube (400) to make the coffee powder enter the brewing mechanism (2) evenly and in a loose powder form; The dehumidification unit dries the inside of the powder dispensing tube (400) to keep the coffee powder in a loose state during dispensing.

6. The coffee extraction apparatus according to claim 5, characterized in that: The powder mixing component is a fan blade (12) that extends into the powder supply tube (400). The fan blade (12) is driven by the second drive component (11) and rotates in the powder supply tube (400) to stir the coffee powder.

7. The coffee extraction apparatus according to claim 5, characterized in that: The powder leveling component is a fan (13), the air outlet of which is connected to the powder feeding pipe (400) to drive the coffee powder in the powder feeding pipe (400) with airflow to make the coffee powder uniform.

8. The coffee extraction apparatus according to claim 1, characterized in that: The tamping device (300) is equipped with a detection device (600) for detecting whether the brewing mechanism (2) is installed; the detection device (600) is connected to the circuit system inside the coffee machine body to control the opening and closing of the coffee machine.

9. The coffee extraction apparatus according to claim 8, characterized in that: The detection device (600) includes a contact head (610) movably disposed on the side wall of the powder pressing device (300), and a micro switch (620) disposed at the tail of the contact head (610); When the contact head (610) is squeezed out axially by the brewing mechanism (2), the micro switch (620) is activated; The contact head (610) is provided with an elastic member (630), which causes the contact head (610) to tend to move toward the powder pressing channel (4.2).

10. An extraction method, applied to the coffee extraction apparatus of claim 1, characterized in that: Includes the following steps, S1. Install the brewing mechanism (2) onto the main unit (1) and connect it to the tamping mechanism (4), put in coffee beans, and input the start command; S2. The circuit system performs a self-test and tests the detection device (600) on the powder pressing mechanism (4) to confirm that the brewing mechanism (2) has been installed in place. At the same time, the sensing device (6) on the powder pressing mechanism (4) is in the initial state. The safety mechanism of the circuit system is ensured to be in the conducting state. S3. The circuit system self-test is completed. The grinding mechanism (3) and the powder mixing mechanism are started to grind the coffee beans into powder. At the same time, the powder mixing component of the powder mixing mechanism drives the airflow in the powder supply tube (400), and the dehumidification component of the powder mixing mechanism dehumidifies the powder supply tube (400) to ensure that the coffee powder is evenly dispersed when it enters the brewing mechanism (2) through the powder supply tube (400). S4. The grinding mechanism (3) finishes grinding, the powder pressing mechanism (4) starts, the first driving component (4.1) drives the powder pressing assembly (200) into the powder pressing stroke, and the powder pressing assembly (200) moves downward along the powder pressing channel (4.2); S5. During the powder pressing stroke, the sensing device (6) senses the powder pressing assembly (200) once but does not activate it, and the powder pressing assembly (200) continues to perform the powder pressing action. S6. After the powder pressing is completed, the first driving component (4.1) drives the powder pressing assembly (200) into the reset stroke; the sensing device (6) is activated after sensing the powder pressing assembly (200) again, and the water supply mechanism (5) is started. S7. The tamping assembly (200) stops resetting, and the water supply mechanism (5) supplies water to the brewing mechanism (2) through the tamping assembly (200) to extract coffee liquid; S8. Water supply is completed, water supply mechanism (5) stops, and powder pressing component (200) continues to move upward and reset.

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