Automatic powder pressing brewing device for coffee machine

Abstract

The utility model relates to a coffee machine automatic powder pressing brewing device, including the case, it has the inner chamber, and at least is provided with coffee bean entrance and powder bowl installation mouth, water tank, locate on the case, and with the liquid outlet through water pump and heating device intercommunication, powder grinding device, locate in the case inside, with coffee bean entrance intercommunication, and have the powder pipe of convergence between powder bowl installation mouth, powder bowl, detachable setting in the powder bowl installation mouth, powder pressing device, at least including a powder pressing head and drive assembly, and the powder pressing head is driven by drive assembly, can reciprocate along the vertical direction, be equipped with a powder baffle on the powder pressing device, and the powder baffle moves synchronously with the powder pressing head, relative powder pipe has the powder baffle position and the powder position of going down, the utility model has the advantages of: setting the powder baffle and moving synchronously with the powder pressing head, the outlet of powder pipe is blocked in the powder pressing and extraction process, effectively prevent coffee powder splashing, reduce the cleaning burden and improve the extraction effect.

Description

Technical Field

[0001] This utility model relates to the technical field of coffee machines, and in particular to an automatic coffee tamp and brewing device for coffee machines. Background Technology

[0002] A coffee machine is a device that can automatically grind, tamp, fill, brew, and remove coffee grounds. The entire process is automated, and users only need to pour coffee beans into the machine to get a delicious cup of coffee, which is convenient and quick.

[0003] Currently, in the coffee machine industry, especially in the field of espresso machines, manual tamping is required after grinding. This involves manually tamping the coffee grounds with a tamping hammer to ensure that the coffee grounds form a firm pouch, which is beneficial for better coffee extraction.

[0004] Chinese invention patent CN116115072B discloses an automatic tamping mechanism for coffee beans in a coffee machine. It addresses the technical problem of suboptimal design of the grinding and tamping assembly in existing similar products, particularly the tamping assembly. The mechanism includes a grinding assembly, a tamping assembly, and a coffee funnel assembly. Key structural design features include the tamping assembly positioned at the top of the funnel seat of the coffee funnel assembly. A tamping hammer is located at the bottom of the valve body of the tamping assembly, and the tamping hammer is sealed to the valve body. One end of the valve body is fitted into a valve seat, and springs are located at the four corners of the valve seat. A valve head is located at the inlet on one side of the valve body. A piston sleeve, which moves up and down within and is sealed inside the valve body, is located in the inner cavity of the other end of the valve body. The top of the piston sleeve is fitted into a piston cover. A piston ring is located on the outer diameter of the piston sleeve at the point where the piston sleeve and piston cover fit together. The piston ring and piston sleeve form a piston assembly. The piston sleeve moves up and down with the hydraulic pressure within the cavity.

[0005] However, the tamping structure is complex, and when the coffee is extracted after tamping, the tamping hammer detaches from the coffee puck. When hot water enters the portafilter, the untamped coffee powder or hot water splashes into the grinder and remains there, affecting the quality of the next batch of coffee. Utility Model Content

[0006] In order to solve the above-mentioned problems in the prior art, the present invention provides an automatic coffee maker tamping and brewing device.

[0007] The above-mentioned problems of this utility model are solved by the following technical solution:

[0008] An automatic coffee tamp and brewing device for a coffee machine includes,

[0009] The chassis has an internal cavity and is provided with at least a coffee bean inlet and a port for installing the coffee bowl;

[0010] A water tank is installed on the chassis and is connected to the liquid outlet via a water pump and a heating device;

[0011] The grinding device is located inside the machine housing, connected to the coffee bean inlet, and connected to the coffee bowl mounting port by a feed pipe;

[0012] The powder bowl is detachably mounted at the powder bowl mounting port;

[0013] The powder pressing device includes at least a powder pressing head and a drive assembly. The powder pressing head is driven by the drive assembly and can reciprocate in the vertical direction.

[0014] The powder pressing device is equipped with a powder baffle plate, which moves synchronously with the powder pressing head and has a powder blocking position and a powder feeding position relative to the powder feeding pipe.

[0015] A further provision of the above technical solution is that the powder baffle is a baffle plate that extends onto the edge of the powder pressing head.

[0016] A further configuration of the above technical solution is: the drive assembly meshes with a rotating gear and a transmission rod, the gear being driven to rotate by the drive component, and the transmission rod being connected to the powder pressing head.

[0017] A further provision of the above technical solution is that the powder pressing device also includes a micro switch, the micro switch is located on the side of the moving space of the powder pressing head, and the powder baffle plate is provided with a protrusion that can activate the micro switch.

[0018] A further provision of the above technical solution is that an avoidance groove is provided on the outer surface of the powder baffle plate below the protrusion.

[0019] A further provision of the above technical solution is that the powder pressing head is provided with a water inlet, and the water inlet is connected to the heating device through a water pipe.

[0020] A further provision of the above technical solution is that: a filter screen is provided on the lower end face of the powder pressing head, a water injection cavity is provided between the powder pressing head and the filter screen, and the water injection port is connected to the water injection cavity.

[0021] A further provision of the above technical solution is that the powder pressing device further includes a powder pressing sleeve, which is fixed inside the machine housing and has a guide chamber capable of accommodating the movement of the powder pressing head;

[0022] The lower end of the powder pressing sleeve extends to the lower part of the powder bowl mounting opening for connection with the powder bowl.

[0023] A further provision of the above technical solution is that: an L-shaped guide rib is provided on the lower inner circumferential surface of the powder pressing sleeve, and a sliding strip that cooperates with the guide rib is provided on the upper outer circumferential surface of the powder bowl.

[0024] A further provision of the above technical solution is that a guide surface is provided on the mating surface where the slider and the guide rib contact.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] The baffle plate moves synchronously with the tamping head, blocking the outlet of the coffee feed tube during tamping and extraction, effectively preventing coffee powder from splashing, reducing cleaning burden and improving extraction results;

[0027] The powder pressing head is driven by a gear-drive rod to improve the powder pressing force and stroke stability;

[0028] The micro switch is set up in conjunction with the convex point to achieve automatic control and ensure the precise start and stop of the powder pressing action;

[0029] An integrated water injection function is installed on the powder pressing head to improve the uniformity of extraction. Attached Figure Description

[0030] Figure 1 This is an exploded view of the present invention.

[0031] Figure 2 This is a schematic diagram of the connection structure between the grinding device and the pressing device.

[0032] Figure 3 This is a schematic diagram of the exploded structure of the powder pressing device.

[0033] Figure 4 This is a cross-sectional view of the powder pressing head when it is in the grinding position.

[0034] Figure 5 This is a cross-sectional structural diagram of the powder pressing head when it is in the powder pressing position.

[0035] Figure 6 This is a cross-sectional view of the powder pressing head when it is in the extraction position.

[0036] Figure 7 This is a schematic diagram showing the exploded structure of the powder pressing head.

[0037] Figure 8 This is a schematic diagram of the cross-sectional structure of the powder pressing head.

[0038] Figure 9 This is an exploded structural diagram of the powder pressing sleeve and powder bowl.

[0039] Figure 10 This is the overall circuit diagram of this utility model.

[0040] The attached diagram is labeled: 100, chassis; 101, coffee bean inlet.

[0041] 200. Water tank;

[0042] 300. Powder bowl; 310. Slider; 310.1. Guide surface;

[0043] 400. Grinding device; 410. Powder discharge pipe; 411. Outlet;

[0044] 500. Powder pressing device; 510. Powder pressing head; 511. Powder baffle; 511.1. Protrusion; 520. Transmission rod; 522. Tooth; 521. Insert; 530. Gear; 540. Drive component; 512. Filter screen surface; 513. Sealing ring; 510.1. Water inlet; 510.2. Water inlet chamber; 512.1. Filter hole; 550. Powder pressing sleeve; 551. Guide rib; 551.1. Support platform; 551.2. Mating surface; 552. Clearance opening;

[0045] 1. Control panel; 2. Cover; 3. Micro switch. Detailed Implementation

[0046] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0047] like Figure 1-9 As shown in the figure, this embodiment discloses an automatic coffee tamping and brewing device for a coffee machine.

[0048] An automatic coffee tamp and brewing device for a coffee machine includes,

[0049] The chassis 100 has an internal cavity and is provided with at least a coffee bean inlet 101 and a port for installing a coffee bowl 300;

[0050] A water tank 200 is mounted on the casing 100 and is connected to the liquid outlet via a water pump and a heating device.

[0051] The grinding device 400 is located inside the housing 100, connected to the coffee bean inlet 101, and connected to the coffee bowl 300 mounting port by a powder feeding tube 410.

[0052] The powder bowl 300 is detachably mounted at the installation port of the powder bowl 300.

[0053] The powder pressing device 500 includes at least a powder pressing head 510 and a drive assembly. The powder pressing head 510 is driven by the drive assembly and can reciprocate in the vertical direction.

[0054] The powder pressing device 500 is provided with a powder baffle plate 511. The powder baffle plate 511 moves synchronously with the powder pressing head 510 and has a powder blocking position and a powder feeding position relative to the powder feeding tube 410.

[0055] The above is the basic scheme of this embodiment.

[0056] Specific reference Figure 1 As shown, the chassis 100 is a shell structure, with a water tank 200 located at its back. The water tank 200 is attached to the chassis 100 to form a complete unit. The coffee bean inlet 101 is located at the top of the chassis 100 and is connected to a funnel-shaped bean trough. A cover 2 is provided at the top to close the coffee bean inlet 101. A control panel 1 for controlling the coffee machine program is located on the top of the chassis 100.

[0057] The machine casing 100 is equipped with a heating device and a water pump. The water pump draws water from the water tank 200. The room temperature water enters the heating device, is heated, and then enters the powder bowl 300 to extract the pressed powder.

[0058] In this embodiment, the grinding device 400 is a conventional grinder in the prior art, including a grinding cup with grinding blades inside. The grinding blades are driven to rotate by a drive component 540 to grind the coffee beans inside the grinding cup. The mouth of the grinding cup is connected to the coffee bean inlet 101, and the coffee beans are put into the grinding cup through the coffee bean inlet 101.

[0059] In this embodiment, the powder bowl 300 is also a conventional powder receiving device with a handle in the prior art, and the edge of the powder bowl 300 is connected to the powder bowl 300 mounting port through a detachable structure.

[0060] It should be noted that in this embodiment, the water in the water tank 200 is supplied to the water outlet inside the machine casing 100. The water outlet is located above the portafilter 300, and high-temperature water or steam is sprayed into the portafilter 300 to extract the coffee powder inside the portafilter 300. The bottom of the portafilter 300 is provided with a liquid outlet for dispensing coffee liquid.

[0061] The usage method of this embodiment is as follows: the weighed coffee beans are put into the grinding device 400 through the coffee bean inlet 101, and the coffee bowl 300 is installed in the coffee bowl 300 installation port. At this time, the tamping device 500 is located above the coffee bowl 300, and the baffle plate 511 is located in the coffee dispensing position, that is, the coffee dispensing tube 410 is in the open state. The coffee machine is turned on using the control buttons on the chassis 100. The grinder 400 starts grinding the coffee beans into coffee powder of the set coarseness. The coffee powder enters the portafilter 300 through the feed tube 410. When the grinder 400 finishes grinding and the coffee powder is completely in the portafilter 300, the tamping system starts. The tamping device 500 moves downward under the action of the drive component, so that the tamping head 510 enters the portafilter 300 to tamp the coffee powder. During the tamping process, the baffle plate 511 moves downward synchronously with the tamping head 510, blocking the outlet 411 of the feed tube 410, i.e., it is in the baffle position. After tamping is completed, the drive component drives the tamping device 500 to retract, and the tamping head 510 moves upward to disengage from the tamped coffee puck. At the same time, the baffle plate 511 also retracts synchronously. When the tamping head 510 retracts to the set position, the baffle plate 511 is still in the baffle position, that is, it can still block the outlet 411 of the feed tube 410. At this time, the water pump and heating device are started, and the water in the water tank 200 is heated and fed into the portafilter 300 for coffee extraction. The extracted coffee liquid is output from the liquid outlet at the bottom of the portafilter 300.

[0062] Specifically, the powder baffle 511 is a baffle plate that extends onto the edge of the powder pressing head 510.

[0063] Reference Figure 2 As shown, due to the large range of motion of the tamping head 510, during the grinding process, the tamping head 510 is located above the outlet 411 of the feed tube 410, so that the feed tube 410 is in the open state; during the tamping process, the tamping head 510 needs to extend into the coffee bowl 300 and compact the coffee powder as much as possible, while blocking the outlet 411 of the feed tube 410, so that the feed tube 410 is in the closed state. Therefore, in this embodiment, the baffle plate 511 is formed on the side of the tamping head 510 and corresponds to the position of the outlet 411 of the feed tube 410, and extends in a long strip in the moving direction of the tamping head 510.

[0064] Specifically, the drive assembly meshes with a rotating gear 530 and a transmission rod 520. The gear 530 is driven to rotate by a drive component 540, and the transmission rod 520 is connected to the powder pressing head 510.

[0065] Specific reference Figure 3 As shown, the powder pressing head 510 is shaped like a disc, and the lower end of the transmission rod 520 is provided with an insert 521 that can be embedded into the powder pressing head 510. The transmission rod 520 has teeth 522 along its length that mesh with the gear 530.

[0066] The drive unit 540 drives the gear 530 to rotate, which in turn drives the transmission rod 520 in a linear direction, thereby causing the powder pressing head 510 to move up and down.

[0067] Preferably, in this embodiment, the driving component 540 is a drive motor, which can drive the gear 530 to rotate in both directions.

[0068] Preferably, in this embodiment, the powder pressing head 510 has at least three position states, which are, from bottom to top, the powder pressing position, the extraction position, and the grinding position.

[0069] When in the tamping position, the tamping head 510 is located inside the coffee bowl 300, in contact with the coffee powder and compacting it; when in the extraction position, the tamping head 510 is located above the coffee bowl 300, or in a slightly higher position inside the coffee bowl 300, without contacting the coffee puck; when in the grinding position, the tamping head 510 is located above the opening of the feed tube 410.

[0070] In this embodiment, the powder pressing device 500 further includes a micro switch 3, which is located on the side of the moving space of the powder pressing head 510. The powder baffle plate 511 is provided with a protrusion 511.1 that can activate the micro switch 3.

[0071] Specific reference Figures 4-6 As shown, in this embodiment, the micro switch 3 is fixed to the side of the powder feeding tube 410, the activation button on the micro switch 3 faces the powder pressing head 510, and the width of the powder baffle 511 can cover the activation button.

[0072] During the grinding process, the tamper head 510 is positioned above the opening of the feed tube 410, and the opening of the feed tube 410 is open, allowing coffee grounds to enter the coffee hopper 300 along the feed tube 410. At this time, the microswitch 3 is in an inactive state. (See details...) Figure 4 As shown.

[0073] After grinding is completed, the control circuit controls the drive component 540 to run, which drives the powder pressing head 510 to move downward. During the movement, the protrusion 511.1 on the powder baffle plate 511 passes the activation button, and the micro switch 3 remains in the inactive state.

[0074] During the tamping process, the baffle plate 511 blocks the outlet 411 of the powder supply tube 410, and the tamping head 510 compacts the coffee powder in the coffee bowl 300. It should be noted that in this embodiment, the tamping process of the tamping head 510 is a continuous downward movement. At its lowest position, the baffle plate 511 is also in the baffle position, effectively blocking the outlet 411 of the powder supply tube 410. See [link to details] for more information. Figure 5 As shown.

[0075] As the tamping process ends and the drive assembly moves the tamping head 510 upwards, the protrusion 511.1 on the baffle plate 511 gradually approaches the activation button. When the protrusion 511.1 contacts the activation button and presses it, the microswitch 3 is activated, the tamping head 510 is in the extraction position, the motor shuts off, the drive assembly stops, and the tamping head 510 remains in the extraction position. The water tank 200 supplies water to the coffee container 300 via the water pump and heating assembly to extract the coffee liquid. (See details...) Figure 6 As shown.

[0076] After the extraction process ends, the drive component is restarted by using the control button on control panel 1, which drives the powder pressing head 510 to move upward and reset.

[0077] It should be noted that in this embodiment, the control circuit sets the activation procedure for the micro switch 3. During grinding and pressing, the circuit containing the micro switch 3 is not activated; therefore, even if the activation button is pressed, the micro switch 3 will not be activated. Only at the beginning of the extraction process is the circuit containing the micro switch 3 conducting; at this time, pressing the activation button activates the micro switch 3. After extraction is complete or the micro switch 3 has been activated once, the circuit containing the micro switch 3 is disconnected again. (See circuit diagram). Figure 10 As shown.

[0078] To prevent the powder baffle plate 511 from continuously activating the micro switch 3, in this embodiment, a clearance groove is provided on the outer surface of the powder baffle plate 511 below the protrusion 511.1.

[0079] The protrusion 511.1 is located on the powder baffle plate 511 at the position where it connects with the upper edge. The clearance groove is a vertical strip groove, which means that only the position of the protrusion 511.1 can activate the micro switch 3.

[0080] In addition, in this embodiment, steam or high-temperature water is injected into the powder bowl 300 through the powder pressing head 510. Specifically, the powder pressing head 510 is provided with a water inlet 510.1, which is connected to the heating device through a water pipe.

[0081] High-temperature water or steam, heated by the heating device, enters the water inlet 510.1 through the pipeline and is then output from below the powder pressing head 510.

[0082] Specifically, a filter screen surface 512 is provided on the lower end face of the powder pressing head 510, and a water injection cavity 510.2 is provided between the powder pressing head 510 and the filter screen surface 512. The water injection port 510.1 is connected to the water injection cavity 510.2.

[0083] For specific reference Figure 7 and Figure 8As shown, in this embodiment, the filter screen 512 is a separate component with multiple tiny filter holes 512.1 extending through it. A cavity is provided on the lower end face of the powder pressing head 510, and the filter screen 512 is embedded in the cavity, sealing the cavity to form a water injection cavity 510.2. High-temperature water or steam is injected into the water injection cavity 510.2 through the water injection port 510.1, and after converging in the water injection cavity 510.2, it is output from the filter screen 512 in multiple fine streams.

[0084] Based on the above settings, the high-temperature water or steam is evenly distributed and diffused through the filter surface 512, allowing the high-temperature water or steam to fully contact the coffee powder, thereby achieving a more complete extraction of the coffee.

[0085] In this embodiment, a sealing groove is provided on the circumferential surface of the powder pressing head 510, and a sealing ring 513 is provided in the sealing groove. This ensures that the powder pressing head 510 is always in sealed contact with the powder bowl 300.

[0086] In this embodiment, the powder pressing device 500 further includes a powder pressing sleeve 550, which is fixed inside the housing 100 and has a guide chamber that can accommodate the movement of the powder pressing head 510.

[0087] The lower end of the powder pressing sleeve 550 extends to the lower part of the mounting port of the powder bowl 300 for connection with the powder bowl 300.

[0088] Specific reference Figure 9 As shown, the powder pressing sleeve 550 is a shell fixed inside the chassis 100, and a guide chamber is provided inside the hollow interior. The powder pressing head 510 moves back and forth along the guide chamber.

[0089] Meanwhile, the lower end of the powder pressing sleeve 550 extends below the mounting port of the powder bowl 300 and is provided with an opening for connecting the powder bowl 300; the upper end surface is provided with a shaft hole and a clearance opening 552, the transmission rod 520 passes through the shaft hole, and the powder baffle plate 511 is located at the clearance opening 552, and can enter or exit the outside of the powder pressing sleeve 550 through the clearance opening 552.

[0090] The specific connection method between the powder pressing sleeve 550 and the powder bowl 300 is as follows: an L-shaped guide rib 551 is provided on the lower inner circumferential surface of the powder pressing sleeve 550, and a slide bar 310 that cooperates with the guide rib 551 is provided on the upper outer circumferential surface of the powder bowl 300.

[0091] Specific reference Figure 9As described above, multiple guide ribs 551 are arranged circumferentially, and the upper end surface of the guide ribs 551 forms a support platform 551.1. An inlet groove is formed between adjacent guide ribs 551. The slide bar 310 corresponds to the inlet groove and can slide into the top of the guide rib 551 through the inlet groove. After rotation, the slide bar 310 is supported on the guide rib 551, thereby completing the connection between the powder bowl 300 and the powder pressing sleeve 550.

[0092] Preferably, in order to ensure that the slide bar 310 can slide smoothly onto the guide rib 551, in this embodiment, the mating surface 551.2 where the slide bar 310 and the guide rib 551 contact is provided with a guide surface 310.1.

[0093] The guide surface 310.1 is set as an inclined surface, that is, the thickness of the outer end of the slider 310 is less than the thickness of the inner side. At the same time, the support platform 551.1 of the guide rib 551 is provided with a mating surface 551.2 that mates with the guide surface 310.1. The mating surface 551.2 and the guide surface 310.1 mate to form a guide, so that the slider 310 can slide smoothly into the guide rib 551.

[0094] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. 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 utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An automatic coffee maker tamping and brewing device, characterized in that: include, The chassis (100) has an internal cavity and is provided with at least a coffee bean inlet (101) and a port for mounting a coffee tray (300); A water tank (200) is provided on the casing (100) and is connected to the liquid outlet through a water pump and a heating device; The grinding device (400) is located inside the casing (100), communicates with the coffee bean inlet (101), and is connected to the powder feeding tube (410) between the powder container (300) and the powder feeding port; A powder bowl (300) is detachably mounted at the installation port of the powder bowl (300); The powder pressing device (500) includes at least a powder pressing head (510) and a drive assembly. The powder pressing head (510) is driven by the drive assembly and can reciprocate in the vertical direction. The powder pressing device (500) is provided with a powder baffle plate (511), which moves synchronously with the powder pressing head (510) and has a powder blocking position and a powder feeding position relative to the powder feeding pipe (410).

2. The automatic coffee maker tamping and brewing device according to claim 1, characterized in that: The powder baffle (511) is a baffle plate that extends onto the edge of the powder pressing head (510).

3. The automatic coffee maker tamping and brewing device according to claim 1, characterized in that: The drive assembly engages a rotating gear (530) and a transmission rod (520), the gear (530) being driven to rotate by a drive component (540), and the transmission rod (520) being connected to a powder pressing head (510).

4. The automatic coffee maker tamping and brewing device according to claim 1, characterized in that: The powder pressing device (500) also includes a micro switch (3), which is located on the side of the moving space of the powder pressing head (510). The powder baffle plate (511) is provided with a protrusion (511.1) that can activate the micro switch (3).

5. The automatic coffee maker tamping and brewing device according to claim 4, characterized in that: The outer surface of the powder baffle (511) is provided with a clearance groove located below the protrusion (511.1).

6. The automatic coffee maker tamping and brewing device according to any one of claims 1-5, characterized in that: The powder pressing head (510) is provided with a water inlet (510.1), which is connected to the heating device through a water pipe.

7. The automatic coffee maker tamping and brewing device according to claim 6, characterized in that: The lower end face of the powder pressing head (510) is provided with a filter screen surface (512), and a water injection cavity (510.2) is provided between the powder pressing head (510) and the filter screen surface (512). The water injection port (510.1) is connected to the water injection cavity (510.2).

8. The automatic coffee maker tamping and brewing device according to claim 1, characterized in that: The powder pressing device (500) also includes a powder pressing sleeve (550), which is fixed inside the housing (100) and has a guide chamber that can accommodate the movement of the powder pressing head (510). The lower end of the powder pressing sleeve (550) extends to the lower part of the mounting port of the powder bowl (300) for connection with the powder bowl (300).

9. The automatic coffee maker tamping and brewing device according to claim 8, characterized in that: The powder pressing sleeve (550) has an L-shaped guide rib (551) on its lower inner circumferential surface, and the powder bowl (300) has a slide (310) on its upper outer circumferential surface that cooperates with the guide rib (551).

10. The automatic coffee maker tamping and brewing device according to claim 9, characterized in that: The sliding bar (310) and the guide rib (551) have a guide surface (310.1) on the mating surface (551.2) where they contact each other.

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