Automatic brewing mechanism for a coffee maker

Abstract

This utility model discloses an automatic brewing mechanism for a coffee machine, specifically relating to the field of coffee machine technology. It includes a cup holder installed below the brewing head of the coffee machine. The cup holder has a brewing chamber inside, and a coffee grounds bowl is embedded within the chamber. The bottom of the coffee grounds bowl has an array of micro-holes, wider at the top and narrower at the bottom. An ultrasonic micro-vibrator is embedded at the bottom of the cup holder, facing towards the bottom of the cup holder. A water distribution cover is attached to the top of the coffee grounds bowl and hangs on the top of the cup holder. The bottom of the water distribution cover extends into the inner cavity of the coffee grounds bowl, and a through-hole is formed at the bottom of the water distribution cover. A gap is left between the edge of the water distribution hole and the edge of the bottom of the water distribution cover. This utility model uses dynamic water flow control, with a rotatable water distribution plate to adjust the water flow angle, combined with tilted water distribution micro-holes, to make the path of hot water covering the coffee grounds more complex, reducing channeling effects and avoiding localized over-extraction or under-extraction of the coffee.

Description

Technical Field

[0001] This utility model relates to the field of coffee machine technology, and more specifically, to an automatic brewing mechanism for a coffee machine. Background Technology

[0002] In traditional automatic coffee machine brewing mechanisms, the water distribution screen uses a fixed aperture design. This can easily lead to a phenomenon where hot water flows through the screen, resulting in concentrated water flow in the center and insufficient extraction at the edges. This can cause localized over-extraction (producing bitter substances) or under-extraction (flavor compounds not being fully released). For example, the water flow uniformity of the water distribution screen in a traditional espresso machine brewing head can deviate by ±8%, resulting in significant fluctuations in the TDS (Total Dissolved Solids) of the extract, making it difficult to meet the consistent flavor requirements of specialty coffee. Furthermore, the fixed water flow path cannot accommodate coffee grounds of different grind sizes (e.g., coarse grinds require rapid extraction, while fine grinds require slow penetration), limiting the applicable scenarios for the equipment. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides an automatic brewing mechanism for a coffee machine, including a bowl base installed below the brewing head of the coffee machine. The bowl base has a brewing chamber inside, and a powder bowl is embedded in the brewing chamber. The bottom of the powder bowl has an array of micro-holes that are wider at the top and narrower at the bottom. An ultrasonic micro-vibrator facing the bottom of the bowl base is embedded at the bottom of the bowl base. A water distribution cover is provided on the top of the powder bowl and is hung on the top of the bowl base. The bottom of the water distribution cover extends into the inner cavity of the powder bowl. A through water distribution hole is provided at the bottom of the water distribution cover. A gap is left between the edge of the water distribution hole and the edge of the bottom of the water distribution cover. A water distribution plate is provided above the water distribution hole to cover it. A drive component is installed on the top of the brewing head to drive the movement of the water distribution plate.

[0004] In a preferred embodiment, the top of the bowl base is provided with an upwardly protruding edge, and a pressure ring is fitted on the top of the edge to limit the top of the bowl. The bottom end of the inner side of the pressure ring is pressed against the edge of the top of the bowl.

[0005] In a preferred embodiment, a retaining ring extending outward is provided at the top edge of the powder bowl, the retaining ring is fitted with the bottom inner side of the pressure ring, and a sealing ring is embedded between the bottom of the retaining ring and the top edge of the bowl base.

[0006] In a preferred embodiment, the top edge of the water distribution hood is inclined outward and fits against the inner wall of the top of the pressure ring. There is a gap between the outer wall of the water distribution plate and the inner wall of the bottom of the water distribution hood cavity. Several balls are embedded on the outer wall of the water distribution plate and fit against the inner wall of the bottom of the water distribution hood cavity.

[0007] In a preferred embodiment, the water distribution plate has a plurality of through-holes, which are inclined to one side.

[0008] In a preferred embodiment, a ring of teeth is installed at the top edge of the water distribution plate, and the driving component includes a servo motor embedded in the top of the brewing head, the output shaft of the servo motor extending into the inner cavity of the water distribution hood, and a crown tooth that meshes with the teeth is installed at the bottom end of the output shaft of the servo motor.

[0009] In a preferred embodiment, the bottom of the bowl is connected to a liquid outlet tube, and the bottom of the liquid outlet tube is fitted with a coffee drip tube.

[0010] The technical effects and advantages of this utility model are as follows:

[0011] 1. This utility model uses dynamic water flow control and a water distribution plate that can be rotated to adjust the water flow angle. Combined with inclined water distribution micro-holes, it makes the path of hot water covering coffee powder more complex, reduces channel effect, and avoids local over-extraction or under-extraction of coffee.

[0012] 2. Through the edge diffusion design, the gap at the edge of the water distribution hole guides the water flow to diffuse to the edge of the portafilter first, and then penetrates to the center, solving the problem of "concentrated water flow in the center and insufficient extraction at the edge" in traditional water distribution nets, which is suitable for uniform extraction of coffee. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0015] Figure 3 For the present utility model Figure 2 Detailed diagram of point A in the middle;

[0016] Figure 4 This is a schematic diagram of the water distribution plate of this utility model.

[0017] Figure labeling: 1 brewing head, 2 bowl base, 3 brewing chamber, 4 powder bowl, 5 micro-pore array, 6 ultrasonic micro-vibrator, 7 water distribution cover, 8 water distribution hole, 9 water distribution plate, 10 edge, 11 pressure ring, 12 retaining ring, 13 sealing ring, 14 ball bearing, 15 water distribution micro-pore, 16 teeth, 17 servo motor, 18 crown teeth, 19 liquid outlet tube, 20 coffee drip tube. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0019] like Figure 1-4 The automatic brewing mechanism of the coffee machine shown includes a bowl base 2 installed below the brewing head 1 of the coffee machine. The bowl base 2 has a brewing chamber 3 inside, and a powder bowl 4 is embedded inside the brewing chamber 3. The bottom of the powder bowl 4 has a plurality of micro-hole arrays 5 that are wider at the top and narrower at the bottom. An ultrasonic micro-vibrator 6 is embedded at the bottom of the bowl base 2 facing the bottom of the bowl base 2. The top of the powder bowl 4 has a water distribution cover 7 hanging on the top of the bowl base 2. The bottom of the water distribution cover 7 extends into the inner cavity of the powder bowl 4. A through water distribution hole 8 is opened at the bottom of the water distribution cover 7. A gap is left between the edge of the water distribution hole 8 and the bottom edge of the water distribution cover 7. A water distribution plate 9 is provided above the water distribution hole 8 to cover it. A driving component is installed on the top of the brewing head 1 to drive the water distribution plate 9 to move.

[0020] Based on the above, hot water flows from the brewing head 1 through the water distribution hole 8 of the water distribution cover 7, diffuses through the gap to the edge of the coffee bowl 4, and then sprays onto the coffee powder through the inclined water distribution micro-holes 15 of the water distribution plate 9. The driving component drives the water distribution plate 9 to rotate, changing the water flow angle to achieve dynamic extraction. After extraction, the ultrasonic transducer vibrates the bottom of the coffee bowl 4 to remove residual coffee grounds in the micro-holes.

[0021] Furthermore, the micropore array 5, which is wider at the top and narrower at the bottom, uses its geometric structure to guide the residue to slide off, reducing clogging. The high-frequency vibration of ultrasonic cleaning improves cleaning efficiency and extends the maintenance cycle. Dynamic water flow control and rotating water distribution plate 9 make extraction more uniform and reduce channel effects.

[0022] The top of the bowl base 2 is provided with an upwardly protruding edge 10, and the top of the edge 10 is fitted with a pressure ring 11 that limits the top of the powder bowl 4. The bottom end of the inner side of the pressure ring 11 is pressed against the edge of the top of the powder bowl 4.

[0023] Based on the above, the pressure ring 11 is positioned along the edge 10 and presses down on the top edge of the powder bowl 4 to form a mechanical limit and fix the position of the powder bowl 4. The pressure ring 11 ensures that the powder bowl 4 does not shift during high-pressure extraction, thus improving reliability. The pressure ring 11 can be quickly disassembled, making it easy to replace the powder bowl 4 or clean it.

[0024] A retaining ring 12 extending outward is provided at the top edge of the powder bowl 4. The retaining ring 12 fits against the bottom inner side of the pressure ring 11. A sealing ring 13 is embedded between the bottom of the retaining ring 12 and the top edge of the bowl base 2.

[0025] Based on the above, the retaining ring 12 and the inner side of the pressure ring 11 are fitted together to form a mechanical seal, and the sealing ring 13 fills the gap by elastic compression to prevent hot water leakage.

[0026] The top edge of the water-dividing cover 7 is inclined outward and attached to the inner wall of the top of the pressure ring 11. There is a gap between the outer wall of the water-dividing plate 9 and the inner wall of the bottom of the water-dividing cover 7. Several balls 14 are embedded on the outer wall of the water-dividing plate 9 and the balls 14 are attached to the inner wall of the bottom of the water-dividing cover 7.

[0027] Based on the above, the water distribution cover 7 is fixed to the inner side of the pressure ring 11 by the inclined edge, and the water distribution plate 9 contacts the inner wall of the water distribution cover 7 through the ball bearing 14. When rotating, the ball bearing 14 rolls to reduce friction. The ball bearing 14 converts sliding friction into rolling friction, reducing the friction force and limiting the radial sway of the water distribution plate 9 to ensure the stability of the water flow angle.

[0028] The water distribution plate 9 has a plurality of through water distribution micro-holes 15, which are inclined to one side.

[0029] Based on the above, the inclined water-distributing micro-holes 15 spray water at a certain angle onto the coffee powder, and change the water flow path when rotating to form a spiral or fan-shaped extraction trajectory.

[0030] Furthermore, multi-angle water flow increases the contact area of ​​coffee powder, improves extraction uniformity, and the tilt angle can optimize the extraction efficiency of coarse or fine powder, reducing over-extraction or under-extraction.

[0031] A ring of teeth 16 is installed at the top edge of the water distribution plate 9. The driving component includes a servo motor 17 embedded at the top of the brewing head 1. The output shaft of the servo motor 17 extends into the inner cavity of the water distribution cover 7. A crown tooth 18 that meshes with the teeth 16 is installed at the bottom end of the output shaft of the servo motor 17. The bottom end of the bowl 2 is connected to a liquid outlet pipe 19. A coffee drip pipe 20 is sleeved at the bottom end of the liquid outlet pipe 19.

[0032] Based on the above, the servo motor 17 engages with the tooth 16 through the crown tooth 18 to drive the water distribution plate 9 to rotate clockwise or counterclockwise. The speed can be adjusted by the program. After the extracted coffee liquid is filtered through the micropores of the coffee bowl 4, it flows into the coffee dripping tube 20 through the liquid outlet tube 19 at the bottom of the bowl 2 and finally drips into the receiving container.

[0033] Based on the above, during operation, the gap width between the edge of the water distribution hole 8 and the bottom edge of the water distribution cover 7 matches the diameter of the ball bearing 14, ensuring that the ball bearing 14 can roll freely, while avoiding direct contact between the water distribution plate 9 and the inner wall of the water distribution cover 7. The gap serves as the initial channel for water flow, allowing hot water to diffuse along the edge of the water distribution cover 7 before contacting the water distribution plate 9, forming an annular water curtain. Then, it is evenly sprayed onto the surface of the coffee powder through the inclined micro-holes of the water distribution plate 9, improving the uniformity of extraction. The servo motor drives the water distribution plate 9 to rotate through the engagement of the crown tooth 18 and the tooth 16, changing the orientation of the water distribution micro-holes 15, so that the water flow penetrates the coffee powder at different angles and paths, achieving dynamic extraction. After extraction, the ultrasonic micro-vibrator 6 is activated, impacting the bottom of the coffee bowl 4 with high-frequency vibration, shaking off the coffee residue that is blocked in the micro-holes, preventing the solidification of oils and the growth of bacteria.

[0034] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. An automatic brewing mechanism for a coffee machine, comprising a bowl seat installed below the brewing head of the coffee machine, wherein the bowl seat has a brewing chamber inside, and a powder bowl is embedded inside the brewing chamber, characterized in that, The bottom of the powder bowl has an array of micro-holes that are wider at the top and narrower at the bottom. An ultrasonic micro-vibrator is embedded at the bottom of the bowl base, facing the bottom of the bowl base. The top of the powder bowl is equipped with a water-dividing cover that hangs on the top of the bowl base. The bottom of the water-dividing cover extends into the inner cavity of the powder bowl. A through water-dividing hole is opened at the bottom of the water-dividing cover. A gap is left between the edge of the water-dividing hole and the edge of the bottom of the water-dividing cover. A water-dividing plate is provided above the water-dividing hole to cover it. A drive component that drives the water-dividing plate is installed on the top of the brewing head.

2. The automatic brewing mechanism for a coffee machine according to claim 1, characterized in that: The top of the bowl base is provided with an upwardly protruding edge, and a pressure ring is fitted on the top of the edge to limit the top of the bowl. The bottom end of the inner side of the pressure ring is pressed against the edge of the top of the bowl.

3. The automatic brewing mechanism for a coffee machine according to claim 2, characterized in that: A retaining ring extending outward is provided at the top edge of the powder bowl. The retaining ring fits into the bottom inner side of the pressure ring, and a sealing ring is embedded between the bottom of the retaining ring and the top edge of the bowl base.

4. The automatic brewing mechanism for a coffee machine according to claim 2, characterized in that: The top edge of the water distribution hood is inclined outward and fits against the inner wall of the top of the pressure ring. There is a gap between the outer wall of the water distribution plate and the inner wall of the bottom of the water distribution hood. Several balls are embedded on the outer wall of the water distribution plate and fit against the inner wall of the bottom of the water distribution hood.

5. The automatic brewing mechanism for a coffee machine according to claim 1, characterized in that: The water distribution plate has several through-holes, which are tilted to one side.

6. The automatic brewing mechanism for a coffee machine according to claim 1, characterized in that: A ring of teeth is installed at the top edge of the water distribution plate. The driving component includes a servo motor embedded in the top of the brewing head. The output shaft of the servo motor extends into the inner cavity of the water distribution hood. A crown tooth that meshes with the teeth is installed at the bottom end of the output shaft of the servo motor.

7. The automatic brewing mechanism for a coffee machine according to claim 1, characterized in that: The bottom of the bowl is connected to a liquid outlet tube, and a coffee drip tube is sleeved at the bottom of the liquid outlet tube.

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