Extracting and brewing structure and coffee machine
By simplifying the extraction and brewing structure and transmission components, the problems of complex structure and high cost of existing coffee machines have been solved, achieving simple assembly and stable coffee extraction results, thus meeting market demands.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG XINBAO ELECTRICAL APPLIANCES HLDG CO LTD
- Filing Date
- 2025-05-15
- Publication Date
- 2026-05-12
AI Technical Summary
Existing semi-automatic pressure coffee machines have complex structures, are difficult to assemble, and are costly. Furthermore, switching between single and double cups is cumbersome and has high operating costs.
It adopts a simplified extraction and brewing structure, including a shell, a drive unit, a funnel device, and a brewing head device. The brewing head is driven to move relative to the funnel through a transmission component and a motor, so as to compact and flatten the coffee powder, maintain stable extraction pressure, and supply water to brew coffee liquid through a hot water pipeline. The pressure is stabilized by an OPV pressure relief valve.
It achieves a coffee brewing effect that is simple in structure, easy to assemble, low in cost, and with stable extraction pressure, thus meeting market demands.
Smart Images
Figure CN224219937U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coffee machine technology, and specifically to an extraction and brewing structure and a coffee machine. Background Technology
[0002] Currently, semi-automatic pressure espresso machines require users to weigh out a specified amount of coffee grounds using a funnel assembly, manually tamp the grounds, and then place them into the brewing head holder. If there is insufficient coffee grounds, the gap between the grounds and the brewing head holder widens, potentially causing water to accumulate on top of the grounds, resulting in insufficient extraction pressure and brewing failure. Switching between single and double cups requires replacing the high-pressure funnel filter, which is cumbersome and costly.
[0003] The utility model patent with publication number CN118924127A discloses a brewing head with pressure compensation. When this prior art is working, a servo motor drives the drive shaft to rotate, the drive shaft drives the first-stage drive gear to rotate, the first-stage drive gear drives the gear to rotate, the gear drives the second-stage transmission gear to rotate, and the second-stage transmission gear drives the extraction head to move up and down, so that the extraction head can compress the coffee powder in the funnel. Its overall structure is relatively complex, assembly is difficult, and the manufacturing cost is relatively high, which does not meet market demand.
[0004] Therefore, there is still room for improvement and development in existing technologies. Utility Model Content
[0005] To address the problems of existing technologies having complex structures, difficult assembly, and high manufacturing costs, which do not meet market demands, this utility model provides an extraction and brewing structure and a coffee machine.
[0006] To achieve the above objectives, the technical solution applied in this utility model is as follows:
[0007] An extraction and brewing structure includes a shell with a drive device fixed to it; a funnel device detachably mounted on the shell for holding coffee powder; and a brewing head device including a transmission assembly and a brewing head. The transmission assembly is movably disposed within the shell, and the brewing head is fixed to the transmission assembly. The drive device drives the transmission assembly to move the brewing head relative to the funnel device, thereby compressing and flattening the coffee powder in the funnel device. The brewing head has a water inlet connected to a hot water pipe. This configuration allows the drive device to move the transmission assembly relative to the funnel device during coffee extraction, compressing and flattening the coffee powder in the funnel device while maintaining a zero-distance relationship between the brewing head and the coffee powder, thus maintaining stable extraction pressure. Hot water is then supplied through the hot water pipe to brew the coffee powder into coffee liquid. The overall structure is simple, easy to assemble, and low in cost, meeting market demands.
[0008] According to the above scheme, the transmission assembly includes a first transmission component and a second transmission component. The first transmission component is rotatably disposed within the housing, and a transmission gear is fixed to its upper end. The driving device includes a motor, and a drive gear is fixed to the output end of the motor. The drive gear and the transmission gear are meshed together. The brewing head is fixed to the lower end of the second transmission component, which is slidably disposed within the housing. The second transmission component and the first transmission component are threadedly connected. A guide and limiting component is provided between the second transmission component and the housing. With this configuration, when the motor is working, the drive gear drives the transmission gear to rotate, which in turn drives the first transmission component to rotate. A threaded motion occurs between the first and second transmission components, causing the second transmission component to displace the brewing head relative to the funnel device.
[0009] According to the above scheme, the inner wall of the second transmission component is provided with an internal thread, and the outer wall of the first transmission component is provided with an external thread, with the external thread and the internal thread being threadedly connected. This arrangement ensures that the second transmission component is threadedly connected to the outer wall of the first transmission component.
[0010] According to the above scheme, the guide limiting assembly includes a guide limiting groove vertically disposed on the outer wall of the second transmission member and a guide limiting block disposed on the inner wall of the housing, wherein the guide limiting block and the guide limiting groove are slidably connected. This arrangement allows the second transmission member to slide vertically up and down along the inner wall of the housing under the action of the guide limiting assembly when threaded movement occurs between the first and second transmission members.
[0011] According to the above scheme, the first transmission component has a first through hole formed inside, passing through both the upper and lower ends of the first transmission component. The hot water pipe passes through the first through hole and is connected to the water inlet of the brewing head. An OPV pressure relief valve is installed on the hot water pipe, which automatically releases pressure when the pressure exceeds 9 bar. This configuration facilitates the routing of the hot water pipe through the first through hole. When the pressure exceeds 9 bar, the OPV pressure relief valve automatically releases and stabilizes the pressure, thereby ensuring a stable extraction pressure during the brewing process.
[0012] According to the above solution, a mounting groove is formed on the outer edge of the brewing head, and a sealing ring is fixedly installed in the mounting groove. When the brewing head moves relative to the funnel device, the sealing ring is tightly pressed against the inner wall of the funnel device to form a seal. With this configuration, when brewing coffee, the brewing head and the coffee powder in the funnel device are kept at zero distance, and the sealing ring is tightly pressed against the inner wall of the funnel device to form a seal, preventing water from accumulating on top of the coffee powder and preventing the coffee from overflowing and flowing out from the bottom of the funnel device.
[0013] According to the above scheme, a mounting bracket is fixed on the housing. The funnel device includes a funnel and a filter screen. The filter screen is detachably installed inside the funnel, and the funnel is detachably installed on the mounting bracket. A second through hole is formed inside the mounting bracket, penetrating both ends of the mounting bracket. In practical applications, the funnel is detachably installed on the lower opening of the mounting bracket. When the motor is working, the second transmission component drives the brewing head to extend from the housing and pass through the second through hole to press and flatten the coffee powder inside the funnel device.
[0014] According to the above scheme, a powder inlet is formed on the side wall of the mounting bracket, and a powder tube is connected to the powder inlet; a powder channel inlet and a powder channel outlet are formed at both ends of the powder tube, and a downwardly sloping powder channel is formed between the powder channel inlet and the powder channel outlet. A grinding device is connected to the powder channel inlet, and the powder channel outlet is connected to the powder inlet. With this configuration, the coffee powder ground by the grinding device falls into the filter screen inside the funnel after passing through the powder tube and the mounting bracket.
[0015] According to the above scheme, a limiting step is formed on the inner wall of the housing to limit the gear, and a wear-resistant pad is provided between the gear and the limiting step. With this configuration, the first transmission component is always axially rotated in the same plane position within the housing under the limiting step and gear, and the wear-resistant pad will prevent it from wearing against the inner wall of the housing.
[0016] The present invention describes a coffee machine, which is equipped with the aforementioned extraction and brewing structure.
[0017] The beneficial effects of this utility model are:
[0018] This invention is designed such that, during coffee extraction, the driving device drives the transmission assembly to move the brewing head relative to the funnel device, thereby compressing and flattening the coffee powder in the funnel device. The brewing head and the coffee powder in the funnel device are kept at zero distance, thus maintaining stable extraction pressure. Then, hot water is supplied through the hot water pipe to brew the coffee powder into coffee liquid. Its overall structure is relatively simple, easy to assemble, and low in cost, meeting market demand. Attached Figure Description
[0019] Figure 1 This is an exploded view of the extraction and brewing structure of this utility model;
[0020] Figure 2 This is a cross-sectional view of the extraction and brewing structure of this utility model;
[0021] Figure 3 This is a schematic diagram of the brewing head device in the extraction and brewing structure of this utility model;
[0022] Figure 4 This is a cross-sectional view of the brewing head device in the extraction and brewing structure of this utility model;
[0023] Figure 5This is an exploded view of the brewing head device in the extraction and brewing structure of this utility model;
[0024] Figure 6 This is an exploded view of the powder tube and mounting bracket in the extraction and brewing structure of this utility model;
[0025] Figure 7 This is a schematic diagram of the grinding state of the extraction and brewing structure of this utility model;
[0026] Figure 8 This is a schematic diagram of the double-cup powder pressing state of the extraction and brewing structure of this utility model;
[0027] Figure 9 This is a schematic diagram of the single-cup powder pressing state of the extraction and brewing structure of this utility model.
[0028] In the picture:
[0029] 1. Housing; 11. Motor; 12. Guide limiting block; 13. Limiting step; 2. Powder pipe; 21. Powder channel inlet; 22. Powder channel outlet; 3. Mounting bracket; 31. Second through hole; 32. Powder inlet; 4. Funnel; 5. Transmission assembly; 51. Transmission gear; 52. First transmission component; 521. External thread; 522. First through hole; 53. Second transmission component; 531. Internal thread; 532. Guide limiting groove; 6. Brewing head; 61. Water inlet; 62. Mounting groove; 7. Sealing ring; 8. Filter screen. Detailed Implementation
[0030] The technical solution of this utility model will be described below with reference to the accompanying drawings and embodiments.
[0031] like Figures 1 to 9 As shown, the extraction and brewing structure of this utility model includes a shell 1, on which a driving device is fixed; a funnel device, detachably mounted on the shell 1, used to hold coffee powder; and a brewing head device, including a transmission assembly 5 and a brewing head 6. The transmission assembly 5 is movably disposed within the shell 1, and the brewing head 6 is fixed to the transmission assembly 5. The driving device drives the transmission assembly 5 to move the brewing head 6 relative to the funnel device, thereby compressing and flattening the coffee powder in the funnel device. The brewing head 6 is provided with a water inlet 61, which is connected to a hot water pipe. With this configuration, during coffee extraction, the driving device drives the transmission assembly 5 to move the brewing head 6 relative to the funnel device, thereby compressing and flattening the coffee powder in the funnel device. The brewing head 6 maintains zero distance from the coffee powder in the funnel device, thus maintaining stable extraction pressure. Hot water is then supplied through the hot water pipe to brew the coffee powder into coffee liquid. Its overall structure is relatively simple, easy to assemble, and low in cost, meeting market demands.
[0032] Furthermore, the transmission assembly 5 includes a first transmission member 52 and a second transmission member 53. The first transmission member 52 is rotatably disposed within the housing 1, and a transmission gear 51 is fixed to the upper end of the first transmission member 52. The driving device includes a motor 11, and a drive gear is fixed to the output end of the motor 11. The drive gear and the transmission gear 51 are meshed together. The brewing head 6 is fixed to the lower end of the second transmission member 53, which is slidably disposed within the housing 1. The second transmission member 53 and the first transmission member 52 are threadedly connected. A guide and limiting assembly is provided between the second transmission member 53 and the housing 1. With this configuration, when the motor 11 is working, the drive gear drives the transmission gear 51 to rotate, and the transmission gear 51 drives the first transmission member 52 to rotate. A threaded movement occurs between the first transmission member 52 and the second transmission member 53, causing the second transmission member 53 to displace the brewing head 6 relative to the funnel device.
[0033] In practical applications, the motor 11 drives the gears to rotate via forward and reverse drive, thereby driving the brewing head 6 to move up and down.
[0034] Furthermore, the inner wall of the second transmission member 53 is provided with an internal thread 531, and the outer wall of the first transmission member 52 is provided with an external thread 521. The external thread 521 and the internal thread 531 are threadedly connected. This arrangement allows the second transmission member 53 to be threadedly connected to the outer wall of the first transmission member 52.
[0035] Furthermore, the guide limiting assembly includes a guide limiting groove 532 vertically disposed on the outer wall of the second transmission member 53 and a guide limiting block 12 disposed on the inner wall of the housing 1, wherein the guide limiting block 12 and the guide limiting groove 532 are slidably connected. This arrangement allows the second transmission member 53 to slide vertically up and down along the inner wall of the housing 1 under the action of the guide limiting assembly when threaded movement occurs between the first transmission member 52 and the second transmission member 53.
[0036] Of course, the positions of the guide limiting groove 532 and the guide limiting block 12 can also be interchanged.
[0037] Furthermore, the first transmission component 52 has a first through hole 522 formed inside, penetrating both ends of the first transmission component 52. The hot water pipe passes through the first through hole 522 and is connected to the water inlet 61 of the brewing head 6. An OPV pressure relief valve is installed on the hot water pipe, which automatically releases pressure when the pressure exceeds 9 bar. This design facilitates the routing of the hot water pipe through the first through hole 522. When the pressure exceeds 9 bar, the OPV pressure relief valve automatically releases and stabilizes the pressure, thereby ensuring a stable extraction pressure during the brewing process.
[0038] Furthermore, the brewing head 6 has a mounting groove 62 formed on its outer edge, and a sealing ring 7 is fixedly installed in the mounting groove 62. When the brewing head 6 moves relative to the funnel device, the sealing ring 7 is tightly pressed against the inner wall of the funnel device to form a seal. With this configuration, when brewing coffee, the brewing head 6 maintains zero distance from the coffee powder in the funnel device, and the sealing ring 7 is tightly pressed against the inner wall of the funnel device to form a seal, preventing water from accumulating on top of the coffee powder and preventing the coffee from overflowing from the bottom of the funnel device.
[0039] In practical applications, the sealing ring 7 is tightly attached to the inner wall of the filter screen 8 of the funnel device to form a seal.
[0040] Furthermore, a mounting bracket 3 is fixed on the housing 1. The funnel device includes a funnel 4 and a filter screen 8. The filter screen 8 is detachably installed inside the funnel 4, and the funnel 4 is detachably installed on the mounting bracket 3. A second through hole 31 is formed inside the mounting bracket 3, penetrating both ends of the mounting bracket 3. In practical applications, the funnel 4 is detachably installed on the lower opening of the mounting bracket 3. When the motor 11 is working, the second transmission component 53 drives the brewing head 6 to extend out from the housing 1 and pass through the second through hole 31 to press and flatten the coffee powder in the funnel device.
[0041] Furthermore, the mounting bracket 3 has a powder inlet 32 formed on its side wall, and the powder inlet 32 is connected to the powder tube 2; the powder tube 2 has a powder channel inlet 21 and a powder channel outlet 22 formed at both ends, and a downwardly inclined powder channel is formed between the powder channel inlet 21 and the powder channel outlet 22. The powder channel inlet 21 is connected to a grinding device, and the powder channel outlet 22 is connected to the powder inlet 32. With this configuration, the coffee powder ground by the grinding device falls into the filter screen 8 inside the funnel 4 after passing through the powder tube 2 and the mounting bracket 3.
[0042] In practical applications, the filter 8 is preferably a double-cup filter, which allows users to achieve single or double cup brewing without having to replace the single or double-cup filter.
[0043] Furthermore, the inner wall of the housing 1 is formed with a limiting step 13 that engages with and limits the gear 51, and a wear-resistant pad is provided between the gear 51 and the limiting step 13. With this arrangement, under the limiting position of the limiting step 13 and the gear 51, the first transmission member 52 always rotates axially in the same plane position within the housing 1, and under the action of the wear-resistant pad, it will not wear against the inner wall of the housing 1.
[0044] The present invention describes a coffee machine, which is equipped with the aforementioned extraction and brewing structure.
[0045] The embodiments of the present utility model have been described above with reference to the accompanying drawings. However, the present utility model is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present utility model without departing from the spirit and scope of the claims, and all of these forms are within the scope of protection of the present utility model.
Claims
1. An extraction and brewing structure, characterized in that, include: A housing (1) on which a driving device is fixed; A funnel device, which is detachably mounted on the housing (1), is used to hold coffee powder; The brewing head device includes a transmission assembly (5) and a brewing head (6). The transmission assembly (5) is movably disposed in the housing (1), and the brewing head (6) is fixed on the transmission assembly (5). The driving device is used to drive the transmission assembly (5) to move the brewing head (6) relative to the funnel device, so as to press and flatten the coffee powder in the funnel device. The brewing head (6) is provided with a water inlet (61), and the water inlet (61) is connected to a hot water pipe.
2. The extraction and brewing structure according to claim 1, characterized in that: The transmission assembly (5) includes a first transmission member (52) and a second transmission member (53). The first transmission member (52) is rotatably disposed inside the housing (1). A transmission gear (51) is fixed at the upper end of the first transmission member (52). The driving device includes a motor (11). A drive gear is fixed at the output end of the motor (11). The drive gear and the transmission gear (51) are meshed and connected. The brewing head (6) is fixed at the lower end of the second transmission member (53). The second transmission member (53) is slidably disposed inside the housing (1). The second transmission member (53) and the first transmission member (52) are threadedly connected. A guide limiting assembly is provided between the second transmission member (53) and the housing (1).
3. The extraction and brewing structure according to claim 2, characterized in that: The second transmission component (53) has an internal thread (531) on its inner wall, and the first transmission component (52) has an external thread (521) on its outer wall. The external thread (521) and the internal thread (531) are threaded together.
4. The extraction and brewing structure according to claim 2, characterized in that: The guide limiting assembly includes a guide limiting groove (532) vertically disposed on the outer wall of the second transmission member (53) and a guide limiting block (12) disposed on the inner wall of the housing (1), wherein the guide limiting block (12) and the guide limiting groove (532) are slidably connected.
5. The extraction and brewing structure according to claim 2, characterized in that: The first transmission component (52) has a first through hole (522) formed inside, which passes through the upper and lower ends of the first transmission component (52). The hot water pipe passes through the first through hole (522) and is connected to the water inlet (61) of the brewing head (6). The hot water pipe is equipped with an OPV pressure relief valve that automatically releases pressure when the pressure is greater than 9 bar.
6. The extraction and brewing structure according to claim 2, characterized in that: The brewing head (6) has an installation groove (62) formed on its outer edge. A sealing ring (7) is fixedly installed in the installation groove (62). When the brewing head (6) is displaced relative to the funnel device, the sealing ring (7) is tightly attached to the inner wall of the funnel device to form a seal.
7. The extraction and brewing structure according to claim 2, characterized in that: The housing (1) is fixed with a mounting bracket (3). The funnel device includes a funnel (4) and a filter screen (8). The filter screen (8) is detachably installed inside the funnel (4). The funnel (4) is detachably installed on the mounting bracket (3). The mounting bracket (3) has a second through hole (31) formed inside the mounting bracket (3) that passes through the upper and lower ends of the mounting bracket (3).
8. The extraction and brewing structure according to claim 7, characterized in that: The mounting bracket (3) has a powder inlet (32) formed on its side wall, and the powder inlet (32) is connected to a powder tube (2); the powder tube (2) has a powder channel inlet (21) and a powder channel outlet (22) formed at both ends, and a downwardly inclined powder channel is formed between the powder channel inlet (21) and the powder channel outlet (22); the powder channel inlet (21) is connected to a grinding device, and the powder channel outlet (22) is connected to the powder inlet (32).
9. The extraction and brewing structure according to claim 2, characterized in that: The inner wall of the housing (1) is formed with a limiting step (13) that cooperates with and limits the gear (51), and a wear-resistant pad is provided between the gear (51) and the limiting step (13).
10. A coffee machine, characterized in that: The coffee machine is equipped with the extraction and brewing structure as described in any one of claims 1-9.