Capsule coffee extraction device convenient to clean

Abstract

The invention discloses a capsule coffee extraction device convenient to clean. The capsule coffee extraction device comprises a powder pressing support, a brewing head and a detachable funnel. The powder pressing bracket is provided with a through hole, and the brewing head can move up and down; a containing positioning cavity is formed in the funnel, and a liquid outlet is formed in the bottom. The capsule bin body is arranged in the cavity, the height of the capsule bin body is smaller than the depth of the cavity, and a downward embedding space is reserved for the brewing head. And a capsule puncture needle is arranged on the inner side of the capsule bin. According to the device, stable extraction is achieved through structure optimization, the powder pressing support provides supporting, the brewing head is accurately pressed downwards, axial limiting is formed between the brewing head and the funnel, loosening is prevented, and safety is improved. The water path adopts a through design of direct injection of the brewing head, so that connecting points are reduced, and the sealing performance is good. And the funnel and the capsule bin are detachable, so that thorough cleaning is facilitated, and both extraction performance and use sanitation are considered.

Description

Technical Field

[0001] This invention belongs to the field of coffee machine technology, and in particular relates to a capsule coffee extraction device that is easy to clean. Background Technology

[0002] Capsule coffee machines are becoming increasingly popular due to their ease of use and consistent flavor. Currently, most capsule coffee machines on the market use an integrated design for the funnel containing the coffee capsule and the brewing head, the core component for extraction. This integrated design allows hot water and coffee grounds to stagnate, easily breeding bacteria and affecting the subsequent coffee flavor. Furthermore, their internal water supply systems are often complex, with multi-section connections increasing cleaning difficulty and increasing the risk of leaks and water pressure loss due to excessive sealing, thus affecting extraction stability. Other designs using detachable funnels suffer from instability after installation; especially during extraction, when the brewing head presses down and injects high-temperature, high-pressure hot water, if the funnel becomes loose due to insecure fixing, it can lead to extraction failure, hot water spraying, and even scalding for the user. Therefore, current technology still has significant shortcomings in balancing ease of cleaning, water system simplicity, operational stability, and safety. Summary of the Invention

[0003] (a) Purpose of the invention To overcome the above shortcomings, the present invention aims to provide a capsule coffee extraction device that is easy to clean, so as to solve the problems of inconvenient funnel cleaning and unstable structure of existing capsule coffee machines, the safety hazards in the high temperature and high pressure extraction process, and the difficulty in balancing cleanliness, stability and safety.

[0004] (II) Technical Solution To achieve the above objectives, the technical solution provided in this application is as follows: A capsule coffee extraction device that is easy to clean includes: a tamping stand with a through hole in the middle; a brewing head that is movably mounted above the tamping stand; a funnel that is detachably mounted below the tamping stand, the funnel having a receiving and positioning cavity with an open top and a first liquid outlet hole at its bottom; a capsule chamber body disposed in the receiving and positioning cavity, the height of the capsule chamber body being less than the depth of the receiving and positioning cavity, such that after the capsule chamber body is installed in place, there is sufficient travel space above the capsule chamber body in the receiving and positioning cavity for the brewing head to descend and embed through the through hole; wherein, the capsule chamber body has a water injection hole extending through its top and interior for docking with the brewing head, and a capsule piercing needle for piercing the outer shell of a coffee capsule is provided on its inner top.

[0005] Through the coordinated operation of the powder pressing support, brewing head, and funnel, the overall structure is optimized and functions are integrated. The powder pressing support provides stable support for the device, and the brewing head precisely embeds into the positioning cavity of the funnel when pressed down, forming a reliable axial limit. This ensures that the funnel remains fixed in position during extraction and will not accidentally loosen due to internal pressure or vibration, significantly improving operational safety. The water circuit design adopts a simple through-type structure, with water directly injected from the brewing head and flowing continuously into the capsule through the water injection hole. This effectively reduces connection points and potential leakage points, simplifying the structure while improving sealing and extraction stability. In addition, the detachable design allows users to remove the funnel and capsule chamber separately for thorough cleaning, effectively solving the problem of hygiene dead spots. Overall, it balances a stable and reliable extraction process, an efficient water system, and convenient maintenance and cleaning, achieving a good balance in terms of safety, performance, and ease of use.

[0006] In some embodiments, the powder pressing support is provided with multiple guide columns, and the brewing head is provided with multiple guide holes that cooperate with the guide columns. The guide columns are inserted into the guide holes so that the brewing head can move up and down along them.

[0007] The precise fit between the guide post and the guide hole provides accurate linear guidance for the movement of the brewing head, effectively preventing it from deviating or wobbling during movement and ensuring accurate docking with the funnel below. During extraction, this stable trajectory guarantees the uniformity and reliability of the sealing contact between the brewing head and the funnel, thus significantly improving the operational stability and service life of the device.

[0008] In some embodiments, it further includes a handle rotatably disposed on the upper end face of the capsule compartment body.

[0009] The rotating handle makes it easier and less strenuous for users to install or remove the capsule compartment. The handle design avoids direct contact with high-temperature components, improving operational safety, while also simplifying the maintenance process and enhancing the user experience and the device's human-centered design.

[0010] In some embodiments, the upper end of the capsule body is recessed downward to form a water collection cavity, which concentrates and guides the water flowing from the brewing head into the water injection hole, and the edge of the brewing head abuts against the edge of the water collection cavity.

[0011] The water collection chamber design effectively collects hot water flowing from the brew head and directs it to the water inlet, preventing splashing and loss of water and ensuring efficient hot water entry into the coffee capsule. The contact between the edge of the brew head and the edge of the water collection chamber further enhances the seal, preventing hot water leakage and thus improving extraction efficiency and flavor consistency.

[0012] In some embodiments, it further includes: a first seal surrounding the outside of the brewing head and abutting against the inner wall of the funnel.

[0013] The first seal forms a reliable sealing barrier at the junction of the brewing head and the funnel, which can withstand the high-pressure hot water during the extraction process, effectively preventing hot water from leaking from the connection, ensuring the effective use of water flow and the stable maintenance of extraction pressure, thereby ensuring sufficient and uniform coffee extraction, while improving the safety and reliability of equipment operation.

[0014] In some embodiments, it further includes a second sealing member that surrounds the outer side of the upper end of the capsule body and abuts against the inner sidewall of the funnel.

[0015] The second seal provides an additional seal at the connection between the capsule chamber and the funnel, preventing hot water or coffee liquid from leaking through gaps during high-pressure extraction. This ensures that all fluids flow through the pre-set channels, thereby improving the integrity and hygiene of the extraction process and avoiding damage and performance impact caused by liquid leakage.

[0016] In some embodiments, the capsule chamber body includes: a hollow capsule chamber with an opening at the lower end and a capsule chamber bottom covering the capsule chamber opening. The inner side of the capsule chamber bottom is provided with a plurality of protrusions for abutting against the aluminum foil cover of the coffee capsule, and a plurality of second liquid outlet holes are provided on the capsule chamber bottom.

[0017] The raised section on the inner side of the capsule bottom provides concentrated support for the aluminum foil cover of the coffee capsule. During extraction, when the internal pressure reaches a critical value, the aluminum foil is precisely torn, releasing coffee oils and achieving efficient extraction. Multiple secondary outlet holes form a uniform liquid flow channel, ensuring that the extracted coffee liquid is smoothly and evenly collected and discharged, avoiding local stagnation or uneven flow rate, significantly improving the integrity and flavor consistency of coffee extraction, and contributing to obtaining a coffee beverage with stable quality and rich oils.

[0018] In some embodiments, a mounting groove is provided around the lower opening of the capsule compartment, and a third sealing member is embedded in the mounting groove, the lower end of which abuts against the bottom of the capsule compartment.

[0019] The third seal provides a reliable seal at the connection interface between the capsule chamber and the bottom of the capsule chamber, effectively preventing the extract from leaking out of the joint. This ensures that all extracted coffee liquid can flow out through the preset outlet hole, guaranteeing the integrity and hygiene of the extraction process, while avoiding damage to the equipment and maintenance problems caused by liquid leakage.

[0020] In some embodiments, it further includes: a shell fitted onto the outside of the funnel.

[0021] The design of the outer shell not only enhances the appearance of the device but also provides additional physical protection, preventing users from directly contacting high-temperature components and reducing the risk of burns. At the same time, it strengthens the overall structural strength of the device, improving its safety and durability.

[0022] In some embodiments, the powder pressing support is provided with symmetrical grooves on both sides for the edge of the funnel to be engaged and slide along it.

[0023] The symmetrically arranged sliding groove structure allows the funnel to slide smoothly and accurately into position along a predetermined path during installation, effectively limiting its horizontal movement. During extraction, the sliding groove structure and the downward pressure limiting effect of the brewing head complement each other, ensuring from two directions that the funnel will not accidentally loosen due to vibration or internal pressure, further enhancing the overall stability and safety of the equipment. At the same time, this sliding snap-fit ​​method is intuitive and simple to operate; users do not need complex alignment when inserting or removing the funnel, greatly improving ease of use. Attached Figure Description

[0024] Figure 1 This is a first-view structural schematic diagram of the easy-to-clean capsule coffee extraction device of the present invention. Figure 2 This is a second-view structural schematic diagram of the easy-to-clean capsule coffee extraction device of the present invention. Figure 3 This is a cross-sectional view of the easy-to-clean capsule coffee extraction device of the present invention; Figure 4 This is an exploded view of the easy-to-clean capsule coffee extraction device of the present invention; Figure 5 This is an assembly diagram of the funnel and capsule chamber body in the easy-to-clean capsule coffee extraction device of the present invention. Figure 6 This is a cross-sectional view of the assembled funnel and capsule chamber body in the easy-to-clean capsule coffee extraction device of the present invention. Figure 7 This is a diagram showing the state of the tamping holder and brewing head in the easy-to-clean capsule coffee extraction device of the present invention after disassembly.

[0025] Figure label: 1. Powder tamping support; 101. Guide post; 102. Slide groove; 103. Through hole; 2. Brewing head; 201. Guide hole; 3. Funnel; 301. First liquid outlet; 302. Receiving and positioning cavity; 4. Capsule chamber body; 401. Capsule chamber; 4011. Water inlet; 4012. Water collection cavity; 4013. Mounting groove; 402. Capsule chamber bottom; 4021. Protrusion; 5. Capsule piercing needle; 6. Handle; 7. First seal; 8. Second seal; 9. Third seal; 10. Coffee capsule; 11. Screw locking part; 12. Outer shell; 1201. Third liquid outlet; 13. Filter screen. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0027] This invention provides an easy-to-clean capsule coffee extraction device, including a tamping holder 1 with a through hole 103 in the center. The diameter of the through hole 103 matches the size of the brewing head 2 to allow the brewing head 2 to pass through smoothly. Further, the brewing head 2 is vertically movable above the tamping holder 1, for example, driven by a manual lever or motor, while the funnel 3 is detachably installed below the tamping holder 1 via a snap-fit ​​or threaded connection. Specifically, the funnel 3 has a receiving and positioning cavity 302 with an open top, preferably about 50 mm deep, and a first liquid outlet 301 at the bottom for discharging coffee liquid. Based on this, a capsule chamber body 4 is disposed in the receiving and positioning cavity 302, the height of which is less than the depth of the receiving and positioning cavity 302, for example, the height of the capsule chamber body 4 is about 40 mm. Thus, after installation, about 10 mm of travel space is reserved above for the brewing head 2 to descend through the through hole 103 and embed into the funnel 3 during the extraction process. It is worth noting that the capsule body 4 has a water injection hole 4011 through its top and inside for connecting with the brewing head 2, and a capsule piercing needle 5 is fixedly installed on its inner top, which is fixed to the inside of the capsule body 4 by screws or welding. The needle is preferably made of stainless steel and can reliably pierce the outer shell of the coffee capsule 10 to allow water to enter.

[0028] Specifically, the powder pressing support 1 has symmetrically arranged grooves 102 on both sides for the edge of the funnel 3 to be engaged and slid along. Preferably, the width of the groove 102 matches the thickness of the edge of the funnel 3, thereby allowing the funnel 3 body to be easily installed or removed by sliding.

[0029] Furthermore, the powder pressing support 1 is provided with multiple guide posts 101, and the brewing head 2 is provided with multiple guide holes 201 that cooperate with the guide posts 101. The guide posts 101 are inserted into the guide holes 201 so that the brewing head 2 can move up and down along them. Preferably, a wear-resistant bushing can be installed in the guide hole 201 to improve the smoothness of movement. In this way, the brewing head 2 can always maintain precise centering during the descent, avoiding sealing failure or component wear due to misalignment.

[0030] In addition, a handle 6 is rotatably provided on the upper surface of the capsule body 4 via a pivot. The handle 6 is preferably made of heat-resistant engineering plastic, so that after the funnel 3 is removed, the user can easily take out the capsule body 4 by holding the handle 6 without directly contacting potentially hot parts, which significantly improves the safety and convenience of operation.

[0031] In another preferred embodiment, the upper end of the capsule body 4 is recessed downwards to form a water collection cavity 4012, with a depth of approximately 3 mm, for concentrating and guiding the water flowing from the brewing head 2 into the water inlet 4011. Specifically, the edge of the brewing head 2 and the edge of the water collection cavity 4012 abut tightly against each other when joined, thereby forming a preliminary seal to prevent water overflow. Preferably, the water collection cavity 4012 can be integrally formed on the upper end of the capsule body 4.

[0032] Furthermore, the device also includes a first sealing element 7 that surrounds the outer side of the brewing head 2 and abuts against the inner sidewall of the funnel 3. The first sealing element 7 is preferably a rubber O-ring with a cross-sectional diameter of about 2 mm, which can withstand the high temperature and high pressure of hot water during extraction, effectively preventing liquid leakage from the joint between the brewing head 2 and the funnel 3, thereby ensuring stable extraction pressure and reliable water circuit sealing.

[0033] Similarly, the device also includes a second seal 8 that surrounds the upper outer side of the capsule chamber 4 and abuts against the inner wall of the funnel 3. The second seal 8 can also be made of rubber or silicone, and fills the gap through elastic deformation to prevent hot water or coffee liquid from escaping between the capsule chamber 401 and the funnel 3 under high pressure. In this way, all fluids are guided to the preset outflow path, ensuring complete extraction and hygiene.

[0034] Furthermore, the capsule body 4 includes a hollow capsule chamber 401 with an opening at the bottom and a capsule chamber bottom 402 that covers the opening of the capsule chamber 401. Preferably, the capsule chamber bottom 402 can be pre-installed inside the funnel 3. When the capsule chamber 401 is placed inside the funnel 3, its opening directly aligns with the capsule chamber bottom 402. As the brewing head 2 presses down, the capsule chamber 401 can be pressed tightly onto the capsule chamber bottom 402. Specifically, the inner side of the capsule chamber bottom 402 is provided with multiple protrusions 4021, which are used to abut against the aluminum foil cover of the coffee capsule 10 during extraction to provide concentrated support. Multiple second liquid outlet holes are evenly distributed on the capsule chamber bottom 402, forming a coffee liquid outflow channel to ensure that the extracted liquid is evenly collected and discharged, avoiding local stagnation that could affect the flavor.

[0035] Furthermore, a mounting groove 4013 is provided around the lower opening of the capsule chamber 401, and the device also includes a third sealing element 9 embedded in the mounting groove 4013. The lower end of the third sealing element 9 abuts against the bottom 402 of the capsule chamber, preferably using a silicone gasket, and achieves a seal through compression deformation to prevent coffee liquid from leaking from the joint between the capsule chamber 401 and the bottom 402 of the capsule chamber, thereby ensuring that all liquid flows out through the second liquid outlet, improving the consistency and reliability of the extraction process.

[0036] Finally, the device also includes a housing 12 that fits over the outside of the funnel 3. The housing 12 is preferably made of ABS plastic or metal and is fixed by snap-fit ​​or screws. It not only improves the appearance but also provides heat insulation protection for the user, reducing the risk of burns, while enhancing the overall structural strength and durability. A third liquid outlet 1201 is provided on the housing 12 at the position corresponding to the first liquid outlet 301.

[0037] The usage procedure of the device of the present invention is as follows: Place coffee capsule 10: Open funnel 3, remove capsule chamber body 4 from receiving and positioning cavity 302, place coffee capsule 10 into capsule chamber 401, and then put capsule chamber body 4 back into receiving and positioning cavity 302 of funnel 3 to ensure capsule chamber body 4 is in place.

[0038] Install funnel 3: Insert funnel 3 into the grooves 102 on both sides of the powder pressing bracket 1 and slide it to a fixed position to ensure that funnel 3 is securely installed under the powder pressing bracket 1.

[0039] The pressure-down cooking head 2 is driven by a manual lever or a motor to move downwards along the guide post 101, descends through the through hole 103 of the powder pressing support 1, and embeds itself into the receiving and positioning cavity 302 of the funnel 3. The edge of the cooking head 2 abuts against the edge of the water collection cavity 4012 of the capsule body 4 to form a seal.

[0040] Capsule puncture: During the pressing process of the brewing head 2, the capsule puncture needle 5 on the top of the inner side of the capsule chamber body 4 punctures the outer shell of the coffee capsule 10, preparing for water injection.

[0041] Water extraction: Hot water is injected from the brewing head 2, concentrated and guided through the water collection chamber 4012 to the water inlet 4011, and enters the coffee capsule 10. Under high pressure, the hot water permeates the coffee grounds, facilitating extraction. The protrusion 4021 on the inner side of the capsule bottom 402 abuts against the aluminum foil cover of the coffee capsule 10. When the pressure reaches a critical value, the aluminum foil is torn, releasing coffee oils.

[0042] Liquid output: The extracted coffee liquid flows out through the second liquid outlet on the bottom of the capsule chamber 402, and is then discharged into the cup through the first liquid outlet 301 at the bottom of the funnel 3.

[0043] Elevate brew head 2: After extraction, brew head 2 moves upward and detaches from funnel 3. The user can easily remove capsule chamber 4 via handle 6 and discard used coffee capsule 10.

[0044] Cleaning: Remove the funnel 3 from the tamping holder 1 and separate the capsule body 4 and capsule bottom 402. Rinse all parts with clean water, paying particular attention to cleaning the capsule body 4, capsule bottom 402, and seals to ensure no coffee residue remains and maintain hygiene.

[0045] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A capsule coffee extraction device that is easy to clean, characterized in that, include: A powder pressing support (1) with a through hole (103) in the middle; a brewing head (2) movably mounted above the powder pressing support (1); a funnel (3) detachably mounted below the powder pressing support (1), the funnel (3) having an opening at the top and a first liquid outlet (301) at the bottom; and a capsule chamber body (4) disposed in the opening and positioning cavity (302), the height of the capsule chamber body (4) being less than that of the opening and positioning cavity (302). The depth of the positioning cavity (302) is such that after the capsule body (4) is installed in place, the positioning cavity (302) above the capsule body (4) has a travel space for the brewing head (2) to be inserted into the capsule through the through hole (103); wherein, the capsule body (4) has a water injection hole (4011) for docking with the brewing head (2) through its top and inside, and a capsule piercing needle (5) for piercing the coffee capsule shell is provided on its inner top.

2. The easy-to-clean capsule coffee extraction device according to claim 1, characterized in that, The powder pressing support (1) is provided with multiple guide posts (101), and the brewing head (2) is provided with multiple guide holes (201) that cooperate with the guide posts (101). The guide posts (101) are inserted into the guide holes (201) so that the brewing head (2) can move up and down along them.

3. The easy-to-clean capsule coffee extraction device according to claim 1, characterized in that, Also includes: A handle (6) is rotatably mounted on the upper surface of the capsule body (4).

4. The easy-to-clean capsule coffee extraction device according to claim 1, characterized in that, The upper end of the capsule body (4) is recessed downward to form a water collection cavity (4012), which concentrates and guides the water flowing out of the brewing head (2) into the water injection hole (4011). The edge of the brewing head (2) abuts against the edge of the water collection cavity (4012).

5. The easy-to-clean capsule coffee extraction device according to claim 1, characterized in that, The upper end of the capsule body (4) is recessed downward to form a water collection cavity (4012), which concentrates and guides the water flowing out of the brewing head (2) into the water injection hole (4011). The edge of the brewing head (2) abuts against the edge of the water collection cavity (4012).

6. The easy-to-clean capsule coffee extraction device according to claim 4, characterized in that, Also includes: A second sealing element (8) surrounds the outer side of the upper end of the capsule body (4) and abuts against the inner wall of the funnel (3).

7. The easy-to-clean capsule coffee extraction device according to claim 1, characterized in that, The capsule body (4) includes: a hollow capsule compartment (401) with an opening at the bottom and a capsule compartment bottom (402) covering the opening of the capsule compartment (401). The inner side of the capsule compartment bottom (402) is provided with a plurality of protrusions (4021) for abutting against the aluminum foil cover of the coffee capsule. The capsule compartment bottom (402) is provided with a plurality of second liquid outlet holes.

8. The easy-to-clean capsule coffee extraction device according to claim 6, characterized in that, An installation groove (4013) is provided around the lower opening of the capsule compartment (401), and a third sealing member (9) is also provided embedded in the installation groove (4013), the lower end of which abuts against the bottom (402) of the capsule compartment.

9. The easy-to-clean capsule coffee extraction device according to claim 1, characterized in that, Also includes: The outer shell (12) fits onto the outside of the funnel (3).

10. The easy-to-clean capsule coffee extraction device according to claim 1, characterized in that, The powder pressing support (1) is provided with symmetrical grooves (102) on both sides for the edge of the funnel (3) to be inserted into and slide along it.

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