A coffee brewing device and coffee maker

Abstract

The application belongs to the field of coffee machines and provides a coffee brewing device and a coffee machine. A driving assembly of the coffee brewing device is used to provide driving force. A transmission assembly is arranged in a containing cavity of a funnel support assembly. One end of the transmission assembly is connected with the driving assembly. A funnel assembly is arranged at the bottom end of the funnel support assembly. A coffee powder channel is used to convey powder to be brewed to a powder bowl of the funnel assembly. A soaking head assembly is connected with the transmission assembly and moves up and down with the transmission assembly to compress the powder. A valve assembly is arranged on the transmission assembly and can move up and down under the driving of the transmission assembly to block or open a powder outlet of the coffee powder channel. The soaking head assembly and the valve assembly can be driven to move by one driving assembly, the powder in the powder bowl is compressed, and the coffee powder channel is blocked and opened, which reduces the load of the coffee machine, simplifies the structure, and reduces the cost.

Description

Technical Field

[0001] This application relates to the field of coffee machine technology, and in particular to a coffee brewing device and a coffee machine. Background Technology

[0002] Currently, fully automatic coffee machines on the market typically use a geared motor to drive a valve to close the coffee powder channel to prevent moisture from entering during brewing. This method is complex, has a high machine load, is expensive, and has high maintenance costs. Summary of the Invention

[0003] The purpose of this application is to provide a coffee brewing device and a coffee machine.

[0004] The embodiments of this application adopt the following technical solution: a coffee brewing device, comprising:

[0005] Drive components, used to provide driving force;

[0006] A funnel support assembly having a receiving cavity;

[0007] A transmission assembly is disposed within the receiving cavity, and one end of the transmission assembly is connected to the drive assembly;

[0008] A funnel assembly, including a powder bowl, wherein the funnel assembly is detachably disposed at the bottom end of the funnel support assembly;

[0009] The coffee powder channel has a powder outlet at one end that is connected to the receiving cavity, and is used to transport the coffee powder to be brewed to the coffee bowl.

[0010] An immersion head assembly is connected to the other end of the transmission assembly and moves up and down with the transmission assembly to tamp the powder in the coffee bowl. Water for brewing coffee can enter the coffee bowl through the immersion head assembly to brew the tamped powder in the coffee bowl.

[0011] A valve assembly, which is mounted on the transmission assembly, can move up and down under the drive of the transmission assembly to block or open the outlet of the coffee powder channel.

[0012] This application uses a single drive component to move the immersion head assembly and valve assembly, thereby compressing the coffee powder in the coffee bowl and sealing and opening the coffee powder channel, reducing the load on the coffee machine, simplifying the structure, and reducing costs.

[0013] In some embodiments, the transmission assembly includes a helically engaged transmission screw shaft and a cylindrical transmission sleeve. The top end of the transmission screw shaft is connected to the drive assembly. The transmission screw shaft rotates under the drive assembly, driving the transmission sleeve to move up and down. The soaking head assembly is disposed at the bottom of the transmission sleeve, and the valve assembly is disposed on the transmission sleeve. Through the engagement of the transmission screw shaft and the transmission sleeve, the up and down movement of the transmission sleeve is realized, thereby driving the up and down movement of the soaking head assembly and the valve assembly.

[0014] In some embodiments, the valve assembly includes a valve body disposed on the drive shaft sleeve. When the drive shaft sleeve moves downward to the position where the immersion head assembly tamps the coffee powder in the coffee bowl, the valve body blocks the outlet of the coffee powder channel.

[0015] In some embodiments, the valve assembly further includes a transmission spring and a transmission block, the transmission block being disposed on the top of the side of the transmission shaft sleeve; the bottom of the transmission spring is connected to the top of the valve body, and the top of the transmission spring is connected to the transmission block;

[0016] As the drive shaft sleeve moves downward to the point where the valve body blocks the outlet of the coffee powder channel, it continues to move downward to the position where the immersion head assembly tamps the coffee powder in the coffee bowl. This causes the drive spring to compress, pushing the valve body to maintain the state of blocking the outlet of the coffee powder channel. This achieves a good seal on the coffee powder channel, preventing moisture from entering the coffee powder channel during brewing and from entering the grinding assembly along the coffee powder channel, thus affecting the taste of the coffee powder and causing blockage of the coffee powder channel.

[0017] In some embodiments, a transmission hook is provided on the outer peripheral wall of the transmission shaft sleeve, and a powder channel hook is provided on the valve body. The powder channel hook is hung on the transmission hook under the action of the transmission spring. During the compression of the transmission spring, the powder channel hook separates from the transmission hook. The transmission hook enables the connection and engagement between the transmission shaft sleeve and the valve body. When the valve body is reset upward, the transmission hook can push the valve body upward to reset it.

[0018] In some embodiments, the valve body and the transmission shaft sleeve move up and down relative to each other through the guiding effect of the guide structure, so that the valve body can move up and down more stably and ensure the sealing effect on the coffee powder outlet.

[0019] In some embodiments, a slot is provided on the coffee powder channel, the slot being located below the powder outlet. When the valve body blocks the powder outlet, the bottom of the valve body abuts against the slot, and the valve body is subjected to the bidirectional action of the slot and the transmission spring to better maintain the effect of blocking the powder outlet of the coffee powder channel.

[0020] In some embodiments, the immersion head assembly is provided with a sealing ring. When the immersion head assembly is in the position of tamping coffee powder in the coffee bowl, the sealing ring is tightly attached to the inner wall of the coffee bowl to seal moisture in the coffee bowl, preventing moisture and pressure leakage during coffee brewing, and further reducing the risk of moisture entering the coffee powder channel.

[0021] In some embodiments, an arc-shaped plate is provided at one end of the coffee powder channel corresponding to the powder outlet, and the plate surface of the valve body facing the valve assembly is an arc-shaped surface adapted to the arc-shaped plate, so that the valve body can better fit on the arc-shaped plate and achieve the sealing of the coffee powder channel outlet.

[0022] This application also provides a coffee machine, including a coffee brewing device as described in any of the above embodiments, which reduces the load and cost of the coffee machine and avoids the coffee powder in the coffee powder channel and grinding component being affected by moisture. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the coffee brewing device of this application;

[0025] Figure 2 This is an exploded view of the coffee brewing device of this application;

[0026] Figure 3 This is a schematic diagram of the valve body in the coffee brewing device of this application;

[0027] Figure 4 This is a structural schematic diagram of the valve body in the coffee brewing device of this application from another angle;

[0028] Figure 5 This is a longitudinal sectional view of the coffee brewing device when the transmission shaft sleeve is in its highest position and the powder outlet is open.

[0029] Figure 6This is a longitudinal sectional view of the coffee brewing device when the valve body of this application is sealed at the powder outlet and the tamping process is complete.

[0030] Figure 7 This is a longitudinal sectional view of a coffee brewing device in which the valve body of this application blocks the powder outlet, the transmission shaft sleeve moves upward, and the transmission spring begins to reset.

[0031] Reference numerals: 1. Drive assembly; 2. Transmission screw shaft; 201. Driven gear; 202. External transmission thread; 3. Transmission bushing; 301. Internal transmission thread; 302. Transmission lifting hook; 303. Transmission pressure block; 4. Immersion head assembly; 401. Water inlet; 402. Sealing ring; 5. Coffee powder channel; 501. Powder inlet; 502. Powder outlet; 503. Arc plate; 6. Transmission spring; 7. Valve body; 701. Powder channel hook; 702. Guide protrusion; 8. Funnel support assembly; 9. Funnel assembly; 901. Powder bowl. Detailed Implementation

[0032] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0033] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this application will be apparent to those skilled in the art.

[0034] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0035] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0036] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application.

[0037] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0038] Specific embodiments of this application are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in a variety of substantially any suitable detailed structures.

[0039] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0040] To address the problems in the background art, embodiments of this application provide a coffee brewing device, combined with Figure 1 and Figure 2 The coffee brewing device may include a drive assembly 1, a funnel support assembly 8, a transmission assembly, a funnel assembly 9, a coffee powder channel 5, an immersion head assembly 4, and a valve assembly.

[0041] The drive assembly 1 provides driving force and is connected to the transmission assembly described below. Drive assembly 1 drives at least a portion of the transmission assembly to move up and down, thereby causing the immersion head assembly 4 and the valve assembly mounted on the transmission assembly to move up and down. This allows for the tamping of coffee grounds in the coffee bowl 901 and the sealing and opening of the coffee powder outlet 502 by the valve assembly. In other words, the immersion head assembly 4 and the valve assembly can be driven by a single drive assembly 1, eliminating the need for two separate drive structures. This reduces the overall load on the coffee brewing device, making it more portable and avoiding increased costs associated with adding more drive structures.

[0042] The funnel support assembly 8 serves as the mounting base for structures such as the coffee powder channel 5, the funnel assembly 9, and the transmission assembly, and it has a receiving cavity. One end of the coffee powder channel 5 is the powder outlet 502, and the other end is the powder inlet 501. The powder outlet 502 of the coffee powder channel 5 is interconnected with the receiving cavity. The coffee powder channel 5 is used to transport the coffee powder to be brewed into the powder bowl 901 of the funnel assembly 9. The coffee powder channel 5 can be inclined, with the powder outlet 502 lower than the powder inlet 501, so that the coffee powder can naturally slide down the coffee powder channel 5 and fall into the funnel assembly 9 installed at the bottom of the receiving cavity through the powder outlet 502. More specifically, the coffee powder can fall into the powder bowl 901 of the funnel assembly 9. The powder inlet 501 of the coffee powder channel 5 can be connected to the grinding assembly of the coffee machine, and the ground coffee powder in the grinding assembly can fall into the coffee powder channel 5 through the powder inlet 501.

[0043] The funnel assembly 9 is detachably mounted at the bottom of the funnel support assembly 8. The funnel assembly 9 may include a powder container 901 and a handle connected to the powder container 901. The powder container 901 of the funnel assembly 9 and the funnel support assembly 8 can be fixed and disassembled by screwing. Specifically, the detachable connection method of the funnel assembly 9 in existing coffee machines can be adopted, which will not be elaborated here. When the funnel assembly 9 is installed on the funnel support assembly 8, the coffee machine's grinding assembly can be activated to grind coffee beans. At this time, the powder outlet 502 is open (e.g., Figure 5 (As shown). The ground coffee powder falls from the inlet 501 of the coffee powder channel 5 to the outlet 502 and then into the portafilter 901. After grinding, the drive assembly 1 can be activated to drive the transmission assembly. When brewing coffee, the portafilter 901 can be installed at the bottom of the funnel support assembly 8. After brewing, the funnel assembly 9 can be removed.

[0044] A transmission assembly is housed within the receiving cavity. One end of the transmission assembly is connected to the drive assembly 1, enabling the force exerted by the drive assembly 1 to be transmitted to the transmission assembly, thereby driving the transmission assembly to perform corresponding actions. For example, the drive assembly 1 may include a drive motor and a transmission gear assembly, etc. The drive motor is connected to the transmission assembly through the transmission gear assembly to drive the transmission assembly to move. The drive motor can rotate forward and reverse to drive the transmission assembly to move downward and upward, respectively.

[0045] Of course, it is understood that the drive component 1 can also be connected to the transmission component in other ways. The specific transmission method is not specifically limited. It is only used as an example and does not constitute a limitation on the scope of protection of the claims.

[0046] As mentioned above, the immersion head assembly 4 can be connected to the other end (bottom end) of the transmission assembly and move up and down with the transmission assembly to tamp the powder in the powder bowl 901. Water for brewing coffee can enter the powder bowl 901 through the immersion head assembly 4 to brew the tamped powder in the powder bowl 901.

[0047] The valve assembly is also mounted on the transmission assembly and can move up and down under the drive of the transmission assembly to block or open the outlet 502 of the coffee powder channel 5. When the coffee powder has finished falling and the coffee is being brewed, the outlet 502 is blocked by the valve assembly. After brewing, the valve assembly can move upward to open the outlet 502.

[0048] For example, after coffee grounds enter the coffee bowl 901 along the coffee grounds channel 5 and are dispensed, the drive motor of the drive assembly 1 can rotate forward, causing the transmission assembly to move downward, which in turn causes the immersion head assembly 4 and the valve assembly to move downward as well. Once the immersion head assembly 4 has moved to the set position, it can tamp the coffee grounds in the coffee bowl 901. When the immersion head assembly 4 reaches the set position, the valve assembly can block the coffee outlet 502. Whether tamping is complete can be determined by a limit switch on the immersion head assembly 4. After tamping, water (hot water, room temperature water, or ice water) can be supplied to the coffee bowl 901 through the immersion head assembly 4 to brew the coffee. During the coffee brewing process, because the coffee outlet 502 is blocked by the valve assembly, water vapor will not enter the coffee grounds channel 5. After the coffee brewing is complete, the funnel assembly 9 can be detached from the funnel support assembly 8. The drive motor can then rotate in reverse, causing the transmission assembly to move upward, which in turn causes the immersion head assembly 4 and the valve assembly to move upward and reset. After the funnel assembly 9 is removed from the funnel support assembly 8, the drive motor can be reversed after the moisture has dissipated further to further prevent moisture from entering the coffee powder channel 5.

[0049] This application uses a single drive component 1 to drive the immersion head component 4 and the valve component, thereby compressing the coffee powder in the powder bowl 901 and sealing and opening the coffee powder channel 5, reducing the load on the coffee machine, simplifying the structure, and reducing costs.

[0050] In some embodiments, the transmission assembly may include a helically engaged transmission screw shaft 2 and a cylindrical transmission sleeve 3, wherein the top end of the transmission screw shaft 2 can be connected to the drive assembly 1. The transmission screw shaft 2 has an external transmission thread 202, and the transmission sleeve 3 has an internal transmission thread 301. The transmission screw shaft 2 rotates under the drive of the drive assembly 1, and drives the transmission sleeve 3 to move up and down. Continuing with the above embodiments, the drive motor of the drive assembly 1 can be connected to the top end of the transmission screw shaft 2 via a gear assembly. For example, the drive motor can be connected to a driving gear, and the top end of the transmission screw shaft 2 can be connected to a driven gear 201. The driven gear 201 can also be designed as an integral part of the transmission screw shaft 2. The operation of the drive motor can drive the driving gear to rotate, which in turn drives the driven gear 201 to rotate, thereby realizing the rotational drive of the transmission screw shaft 2. The rotation of the transmission screw shaft 2 can further drive the transmission sleeve 3 to move up and down. Of course, in addition to the driving gear and the driven gear 201, a transition gear or gear set can also be provided between the driving gear and the driven gear 201. Preferably, the number of gears can be reduced to reduce the load on the coffee brewing device.

[0051] The brewing head assembly 4 can be located at the bottom of the drive shaft sleeve 3 and move up and down simultaneously with the drive shaft sleeve 3. The brewing assembly includes a brewing head cover and a filter. The brewing head cover has a water inlet 401, which can be connected to an external heating boiler assembly to obtain water supply, forming a brewing assembly that can move up and down. The filter can be located at the water outlet end (lower end) of the brewing head cover. When the drive shaft sleeve 3 moves downward, the filter moves downward with the brewing head cover to tamp the coffee powder in the coffee bowl 901. Water for brewing coffee enters the brewing head cover through the water inlet 401 and then enters the coffee bowl 901 to brew the tamped coffee powder in the coffee bowl 901. The bottom of the filter can also be provided with tamping patterns, etc., and the specific pattern setting can be set according to requirements. The soaking head assembly 4 includes the valve assembly mounted on the transmission shaft sleeve 3. Through the cooperation between the transmission screw shaft 2 and the transmission shaft sleeve 3, the transmission shaft sleeve 3 can move up and down, thereby driving the soaking head assembly 4 and the valve assembly to move up and down.

[0052] In some embodiments, the valve assembly may include a valve body 7, which is disposed on the drive shaft sleeve 3. When the drive shaft sleeve 3 moves downward to the position where the immersion head assembly 4 tamps the coffee powder in the portafilter 901, the valve body 7 blocks the outlet 502 of the coffee powder channel 5. For example, the valve body 7 can be fixed to the side of the drive shaft sleeve 3, so that when the drive shaft sleeve 3 moves downward to the position where the immersion head assembly 4 tamps the coffee powder in the portafilter 901, the valve body 7 just blocks the outlet 502 of the coffee powder channel 5. When the drive shaft sleeve 3 moves upward, the valve body 7 can release the blockage of the outlet 502.

[0053] Of course, before the drive shaft sleeve 3 moves downward to the position where the immersion head assembly 4 tamps the coffee powder in the portafilter 901, the valve body 7 can already be sealed at the outlet 502 of the coffee powder channel 5. That is, the valve body 7 can seal the outlet 502 earlier than the immersion head assembly 4 moves to the position where it tamps the coffee powder in the portafilter 901; and when the drive shaft sleeve 3 moves upward, the immersion head assembly 4 can move upward synchronously with the drive shaft sleeve 3, while the valve body 7 continues to move towards the outlet 502. After the drive shaft sleeve 3 moves upward a certain distance, the valve body 7 then releases the seal on the outlet 502. For example, combined with Figure 3 and Figure 4 In some embodiments, the valve assembly may further include a transmission spring 6 and a transmission pressure block 303. The transmission pressure block 303 is disposed on the top of the side of the transmission shaft sleeve 3. The bottom of the transmission spring 6 is connected to the top of the valve body 7, and the top of the transmission spring 6 is connected to the transmission pressure block 303. The transmission spring 6 exerts a downward pushing force on the valve body 7.

[0054] When the drive motor rotates forward, the drive shaft sleeve 3 initially moves downward, causing the valve body 7, drive spring 6, and immersion head assembly 4 to all move downward. As the drive shaft sleeve 3 moves downward, until the valve body 7 seals the outlet 502 of the coffee powder channel 5, the drive shaft sleeve 3 can continue to move downward. The drive spring 6 can be further compressed, continuously providing a downward pushing force to the valve body 7, ensuring that the valve body 7 maintains a tight seal on the outlet 502. This achieves a good seal on the coffee powder channel 5, preventing moisture from entering the coffee powder channel 5 during brewing and from entering the grinding assembly along the coffee powder channel 5, which would affect the taste of the coffee powder and cause blockage. At the same time, the immersion head assembly 4 also continues to move downward to the position where it tamps the coffee powder in the coffee bowl 901. After the coffee brewing is complete, the funnel assembly 9 can be removed, the drive motor reverses, the drive shaft sleeve 3 moves upward, and the immersion head assembly 4 moves upward synchronously. The drive spring 6 extends and resets, and at this time, the valve body 7 can still maintain the seal on the outlet 502. When the transmission spring 6 is fully extended and reset, the valve body 7 can gradually move upward and release the blockage of the air outlet until the transmission sleeve 3 moves upward and resets. In this way, even if there is some moisture in the containment cavity when the funnel assembly 9 is first removed, the valve body 7 still maintains the blockage of the powder outlet 502, preventing moisture from entering. As the transmission sleeve 3 moves upward, the moisture in the containment cavity quickly dissipates, and even when the powder outlet 502 is opened, no moisture will enter the coffee powder channel 5, further improving the sealing and protection effect on the coffee powder channel 5.

[0055] One or more transmission springs 6 can be provided. The illustrations in this application use two transmission springs 6 as an example. A first column extending downwards and engaging with the top of the transmission spring 6 can be provided on the transmission pressure block 303, and a second column extending upwards and engaging with the bottom of the transmission spring 6 can be provided on the valve body 7, so that the transmission spring 6 can be more stably mounted on the transmission shaft sleeve 3, thereby providing a stable pushing force for the valve body 7.

[0056] In some embodiments, combined with Figure 2 , Figure 5 , Figure 6 and Figure 7 A transmission hook 302 can also be provided on the outer peripheral wall of the transmission shaft sleeve 3, and a powder channel hook 701 is provided on the valve body 7, such as Figure 5 As shown, the powder channel hook 701 is hung on the transmission hook 302 under the action of the transmission spring 6. Combined with the above embodiments and... Figure 6 As the drive shaft sleeve 3 moves downward a certain distance, during the compression of the drive spring 6, the powder channel hook 701 and the drive lifting hook 302 can separate. When the drive shaft sleeve 3 returns to its original position, and moves upward to a certain height, the powder channel hook 701 and the drive lifting hook 302 can re-engage (e.g., Figure 7 (As shown). The transmission hook 302 can connect the transmission shaft sleeve 3 and the valve body 7. When the valve body 7 is reset upward, the transmission hook 302 can push the valve body 7 upward to reset it.

[0057] In some embodiments, the valve body 7 and the transmission shaft sleeve 3 move up and down relative to each other through the guiding action of the guide structure, so that the valve body 7 can move up and down more stably, ensuring the sealing effect on the outlet 502 of the coffee powder channel 5. For example, combined with Figure 2 A guide protrusion 702 can be provided on the side of the valve body 7 facing the transmission shaft sleeve 3. The guide protrusion 702 is set vertically. A guide groove (not shown in the figure) that cooperates with the guide protrusion 702 can be provided at the corresponding position on the outer circumference (side) of the transmission shaft sleeve 3. The cooperation between the guide protrusion 702 and the guide groove can enable the valve body 7 to move up and down more stably.

[0058] In some embodiments, combined again Figure 2 The coffee powder channel 5 is provided with a slot, which can be located below the powder outlet 502. When the valve body 7 blocks the powder outlet 502, the bottom of the valve body 7 can abut against the slot. The slot limits the downward movement of the valve body 7, and the valve body 7 can better maintain the effect of blocking the powder outlet 502 of the coffee powder channel 5 under the bidirectional action of the slot and the transmission spring 6.

[0059] In some embodiments, combined again Figure 2 , Figure 5 , Figure 6 and Figure 7 The immersion head assembly 4 is provided with a sealing ring 402. For example, in conjunction with the above embodiment, a sealing ring 402 can be provided between the filter and the top cover of the brewing head. When the immersion head assembly 4 is in the position of tamping the coffee powder in the coffee bowl 901, the sealing ring 402 is tightly attached to the inner wall of the coffee bowl 901 to seal the water vapor in the coffee bowl 901, preventing water vapor and pressure leakage during coffee brewing, and further reducing the risk of water vapor entering the coffee powder channel 5.

[0060] In some embodiments, combined again Figure 2 An arc-shaped plate 503 is provided at one end of the coffee powder channel 5 corresponding to the powder outlet 502, and the powder outlet 502 passes through the arc-shaped plate 503. The surface of the valve body 7 facing the coffee powder channel is an arc-shaped surface adapted to the arc-shaped plate 503, so that the valve body 7 can better fit on the arc-shaped plate 503 and achieve the sealing of the powder outlet 502 of the coffee powder channel 5.

[0061] This application also provides a coffee machine, including a coffee brewing device as described in any of the above embodiments, which reduces the load and cost of the coffee machine and prevents the coffee powder in the coffee powder channel 5 and the coffee powder in the grinding assembly from being affected by moisture.

[0062] The foregoing has described in detail several embodiments of this application, but this application is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications based on the concept of this application, and all such variations and modifications should fall within the scope of protection claimed in this application.

Claims

1. A coffee brewing device, characterized in that, include: Drive component (1) for providing driving force; The funnel support assembly (8) has a receiving cavity; A transmission assembly is disposed within the receiving cavity, and one end of the transmission assembly is connected to the drive assembly (1); Funnel assembly (9), which includes a powder bowl (901), is detachably disposed at the bottom end of the funnel support assembly (8); The coffee powder channel (5) has a powder outlet (502) at one end connected to the receiving cavity, which is used to transport the powder to be brewed to the powder bowl (901). The immersion head assembly (4) is connected to the other end of the transmission assembly and moves up and down with the transmission assembly to tamp the powder in the powder bowl (901). Water for brewing coffee can enter the powder bowl (901) through the immersion head assembly (4) to brew the tamped powder in the powder bowl (901). A valve assembly, which is mounted on the transmission assembly, can move up and down under the drive of the transmission assembly to block or open the outlet (502) of the coffee powder channel (5); The transmission assembly includes a helical transmission helical shaft (2) and a cylindrical transmission sleeve (3). The top end of the transmission helical shaft (2) is connected to the drive assembly (1). The transmission helical shaft (2) rotates under the drive assembly (1) and drives the transmission sleeve (3) to move up and down. The soaking head assembly (4) is located at the bottom of the transmission sleeve (3), and the valve assembly is located on the transmission sleeve (3).

2. The coffee brewing device according to claim 1, characterized in that, The valve assembly includes a valve body (7), which is disposed on the drive shaft sleeve (3). When the drive shaft sleeve (3) moves downward to the position where the immersion head assembly (4) presses the coffee powder in the powder bowl (901), the valve body (7) blocks the outlet (502) of the coffee powder channel (5).

3. The coffee brewing device according to claim 2, characterized in that, The valve assembly also includes a transmission spring (6) and a transmission pressure block (303), the transmission pressure block (303) being disposed on the top of the side of the transmission shaft sleeve (3); the bottom of the transmission spring (6) is connected to the top of the valve body (7), and the top of the transmission spring (6) is connected to the transmission pressure block (303); When the drive shaft sleeve (3) moves downward to the position where the valve body (7) blocks the outlet (502) of the coffee powder channel (5), the drive shaft sleeve (3) continues to move downward to the position where the immersion head assembly (4) presses the coffee powder in the powder bowl (901), thereby driving the drive spring (6) to compress and pushing the valve body (7) to maintain the state of blocking the outlet (502) of the coffee powder channel (5).

4. The coffee brewing device according to claim 3, characterized in that, A transmission hook (302) is provided on the outer peripheral wall of the transmission shaft sleeve (3), and a powder channel hook (701) is provided on the valve body (7). The powder channel hook (701) is hung on the transmission hook (302) under the action of the transmission spring (6). During the compression of the transmission spring (6), the powder channel hook (701) separates from the transmission hook (302).

5. The coffee brewing device according to claim 4, characterized in that, The valve body (7) and the transmission shaft sleeve (3) move up and down relative to each other through the guiding effect of the guide structure.

6. The coffee brewing device according to claim 2, characterized in that, The coffee powder channel (5) is provided with a slot, which is located below the powder outlet (502). When the valve body (7) blocks the powder outlet (502), the bottom of the valve body (7) abuts against the slot.

7. The coffee brewing device according to claim 1, characterized in that, The immersion head assembly (4) is provided with a sealing ring (402). When the immersion head assembly (4) is in the position of tamping coffee powder in the coffee bowl (901), the sealing ring (402) is tightly attached to the inner wall of the coffee bowl (901) to seal the water vapor in the coffee bowl (901).

8. The coffee brewing device according to claim 2, characterized in that, The coffee powder channel (5) is provided with an arc-shaped plate (503) at one end corresponding to the powder outlet (502), and the plate surface of the valve body (7) facing the valve assembly is an arc-shaped surface adapted to the arc-shaped plate (503).

9. A coffee machine, characterized in that, Includes the coffee brewing device as described in any one of claims 1 to 8.

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