Brewing device with hydraulically pushed powder pressing, and coffee maker

Abstract

The present invention relates to the technical field of coffee makers, and specifically relates to a brewing device with hydraulically pushed powder pressing, and a coffee maker. The brewing device comprises a funnel assembly, which is provided with an accommodating cavity used for accommodating coffee powder; a powder pressing assembly, which is movably arranged on the funnel assembly and disposed corresponding to the accommodating cavity; and a hydraulic assembly, wherein the hydraulic assembly is used for pushing the powder pressing assembly to act, enabling the powder pressing assembly to perform powder pressing on the coffee powder located in the accommodating cavity. By means of such a configuration, the present invention uses the hydraulic assembly to hydraulically push the powder pressing assembly to perform powder pressing and compaction on the coffee powder located in the accommodating cavity; thus, compared with the prior art, the pressure for powder pressing is more stable, such that the brewed coffee has a richer and more stable taste; in addition, compared with an electric motor or a speed change mechanism for driving a transmission mechanism, the structure is simpler, the cost is lower, and the powder pressing assembly is not prone to damage.

Description

Liquid-pushing powder brewing device and coffee machine Technical Field

[0001] The present invention relates to the technical field of coffee machines, in particular to a liquid-pushing powder brewing device and a coffee machine. Background Art

[0002] Currently, there are coffee machines with automatic powder pressing on the market:

[0003] For example, Chinese utility model patent publication number CN219699647U discloses an automatic powder compacting structure for a pressure coffee machine, comprising a coffee powder hopper, a hopper support assembly, and a floating head. The floating head is disposed within the hopper support assembly, with the top of the floating head connected to the top of the hopper support assembly. A spring is disposed between the top of the floating head and the top of the hopper support assembly. When the coffee powder hopper is connected to the bottom of the hopper support assembly, the floating head movably connects to the coffee powder hopper and automatically compacts the coffee powder in the coffee powder hopper. This prior art utilizes the floating head to compact the dry coffee powder in the coffee powder hopper while tightening the coffee powder hopper. This unstable compacting force results in a less than pure, thick, and stable brewed coffee.

[0004] For example, Chinese invention patent publication number CN115956807A discloses a coffee machine powder compacting method and brewing unit. This prior art uses a motor or a speed change mechanism to drive a transmission mechanism to move, thereby driving a brewing plug to move and compact the coffee powder. The compacting force is achieved by setting a compacting stroke. The structure is very complex and the cost is very high. In addition, the transmission mechanism is subjected to great pressure from the motor or the speed change mechanism and is easily damaged.

[0005] Therefore, there is still room for improvement and development in the existing technology. Technical Solutions

[0006] In response to the problems in the prior art, the present invention provides a liquid-push powder brewing device and a coffee machine, which uses hydraulic pressure to push the powder pressing component to compact the coffee powder. The powder pressing pressure is stable, thereby making the brewed coffee taste purer, thicker and more stable. Its structure is simpler and the cost is lower.

[0007] In order to achieve the above object, the technical solutions applied by the present invention are as follows:

[0008] A hydraulically-propelled powder brewing device comprises a funnel assembly, the funnel assembly being provided with a receiving chamber for holding coffee powder; a powder pressing assembly being movably mounted on the funnel assembly and correspondingly disposed in the receiving chamber; and a hydraulic assembly for pushing the powder pressing assembly to press the coffee powder in the receiving chamber. The present invention is configured such that the hydraulic assembly utilizes hydraulic pressure to push the powder pressing assembly to press and compact the coffee powder in the receiving chamber. Compared to the prior art, the powder pressing pressure is more stable, resulting in a purer, thicker, and more stable brewed coffee. Furthermore, compared to a motor or a speed-changing mechanism driving a transmission mechanism, the present invention has a simpler structure, lower costs, and is less susceptible to damage to the powder pressing assembly.

[0009] According to the above scheme, the hydraulic assembly includes a hydraulic support and a valve body. The hydraulic support 1 is fixedly connected to the valve body. A valve cavity is formed in the valve body. The valve cavity has an opening at one end near the hydraulic support, and a valve cover is fixed to the opening. A valve core is located in the valve cavity. The first end of the valve core is movably disposed in the valve cavity. The second end of the valve core is connected to a slider through the valve cover. When hydraulic water is injected into the valve cavity, the hydraulic water pushes the first end of the valve core toward the valve cover, which in turn causes the second end of the valve core to drive the slider to push the powder pressing assembly downward. The hydraulic support is equipped with a microswitch 1 for detecting whether the slider has pushed the powder pressing assembly downward to the full extent. The present invention is configured such that when the slider is directly above the powder pressing assembly, i.e., when the slider has pushed the powder pressing assembly downward to its full extent, the microswitch 1 is triggered, stopping the injection of hydraulic water into the valve cavity. In actual application, a hydraulic pump for injecting hydraulic water into the valve cavity is connected to the valve body. The microswitch 1 is electrically connected to the hydraulic pump for injecting hydraulic water into the valve cavity. The valve cover serves to limit the range of movement of the valve core.

[0010] According to the above solution, the first end of the valve core is sleeved with a V-shaped sealing ring for cooperating with the inner wall of the valve cavity to seal the hydraulic water, and a spring (four) is positioned between the first end of the valve core and the valve cover. In this arrangement, the V-shaped sealing ring cooperates with the inner wall of the valve cavity to seal the hydraulic water, thereby pushing the first end of the valve core into action under the pressure of the hydraulic water. When the valve core moves toward the valve cover, the spring (four) is compressed. When the hydraulic water is withdrawn, the rebound force of the spring (four) pushes the valve core back into place, causing the valve core to retract the slider into the valve cavity and disengage the powder pressing assembly.

[0011] According to the above solution, the powder pressing assembly includes a movable block movably mounted on the funnel assembly, a spring bracket, a pressure plate, and a brewing head; the bottom of the movable block abuts the top of the spring bracket, multiple springs 2 are fixed inside the spring bracket, the bottom of the springs 2 abuts the top of the pressure plate, the bottom of the pressure plate abuts the top of the brewing head, and the bottom of the brewing head is arranged correspondingly to the accommodating chamber; the slider of the hydraulic assembly is arranged correspondingly to the movable block, and is used to drive the movable block downward. The present invention is configured in this way, when pressing powder, the hydraulic assembly drives the movable block downward, which in turn drives the spring bracket downward. Under the elastic force of the multiple springs 2, the pressure plate and the brewing head are pushed downward to achieve the purpose of pressing the coffee powder located in the accommodating chamber.

[0012] According to the above solution, the movable block is provided with a first inclined plane at one end close to the slider, and the slider is provided with a second inclined plane at one end close to the movable block. The first inclined plane and the second inclined plane are provided correspondingly, and the inclinations of the first inclined plane and the second inclined plane are consistent. Limit guide plates are provided on both sides of the first inclined plane, and a slider limit guide groove is formed between the two limit guide plates. The present invention is configured such that when the slider moves toward the movable block, the second inclined plane is in contact with the first inclined plane. Under hydraulic thrust, the slider pushes the movable block downward. The inclinations of the first inclined plane and the second inclined plane are consistent, which can make the sliding planes in contact, effectively reducing plane wear under high pressure. The limit guide plates on both sides and the slider limit guide groove formed are used to prevent the slider from swinging when pushing the movable block downward.

[0013] According to the above solution, the funnel assembly is formed with a lower cavity and an upper cavity that are connected. The movable block and the spring bracket are located in the upper cavity, and the pressure plate and the brewing head are located in the lower cavity. A limiting ring is provided between the lower cavity and the upper cavity. The bottom of the limiting ring is limited by the corresponding pressure plate, and a spring is provided between the top of the limiting ring and the movable block. The present invention is configured such that when the powder is compressed, the slider of the hydraulic assembly retracts and disengages from the movable block, and the movable block loses its downward thrust. Under the action of the rebound force of the spring, the movable block is pushed upward to return to its original position. More specifically, a movable block limiting guide groove is provided on the side wall of the upper cavity. The movable block moves up and down and is axially limited in the movable block limiting guide groove. The top of the limiting ring is provided with a spring limiting annular groove for limiting the lower end of the spring. This configuration allows the movable block to move only up and down relative to the side wall of the upper cavity and cannot rotate axially, that is, to prevent the movable block from swinging and displacing during the up and down movement.

[0014] According to the above solution, the spring support is internally provided with a plurality of spring 2 limiting posts and a spring support travel limiting block. The spring 2 limiting post is used to secure the upper end of spring 2, and the spring support travel limiting block is used to limit the downward travel of the spring support relative to the pressure plate. In this arrangement of the present invention, the spring support travel limiting block is used to limit the maximum downward travel of the spring support relative to the pressure plate.

[0015] According to the above solution, a water inlet is provided on one side of the upper portion of the brewing head, and a hot water pipeline is externally connected to the water inlet. A water outlet is provided at the bottom of the brewing head, and the water outlet is arranged corresponding to the accommodating chamber of the funnel assembly; a sealing ring and a filter assembly are fixed to the bottom of the brewing head. The present invention is configured such that the sealing ring is used to form a seal with the accommodating chamber of the funnel assembly when the brewing head is pressed down, so that the powder will not splash out when pressing the powder and the hot water will not leak out when brewing and extracting coffee. The filter assembly is used to filter the hot water and divert the hot water and reduce the pressure of the hot water, so that the brewing and extracting coffee is better. In actual application, the bottom of the brewing head is provided with a sealing ring mounting groove for fixing the sealing ring and a filter bracket mounting groove for fixing the filter assembly. The filter assembly includes a filter bracket and a filter. The filter is fixed on the filter bracket, and the filter bracket is fixed in the filter bracket mounting groove.

[0016] According to the above solution, the funnel assembly includes a funnel bracket and a funnel. The funnel is provided with a receiving cavity for holding coffee powder. The funnel is detachably mounted on the funnel bracket. The movable block, spring bracket, pressure plate, and brew head of the powder pressing assembly are movably mounted on the funnel bracket. The funnel bracket is provided with a microswitch 2 and a slide rod for detecting whether the funnel is properly installed. The slide rod is arranged corresponding to the microswitch 2. The present invention is configured such that when the funnel is pushed into the funnel bracket, pushing the slide rod triggers the microswitch 2. At this time, the receiving cavity of the funnel is directly below the brew head. If pushing the slide rod does not trigger the microswitch 2 when the funnel is pushed into the funnel bracket, it indicates that the funnel is not properly installed, that is, the receiving cavity is not directly below the brew head. In actual application, the funnel bracket is provided with a microswitch 2 mounting groove for mounting the microswitch 2, a slide rod mounting hole for mounting the slide rod, and a water pipe mounting hole. The hot water pipe passes through the water pipe mounting hole and is fixedly connected to the water inlet of the brew head.

[0017] According to the above solution, the funnel bracket is provided with a funnel limiting step and a funnel limiting rib, which cooperate to form a funnel limiting guide groove, and the funnel is detachably mounted in the funnel limiting guide groove; the funnel limiting step is provided with a marble mounting hole, the bottom of the marble mounting hole is sealed by a pressure plate, a marble and a spring are provided in the marble mounting hole, the ends of the spring abut against the pressure plate and the marble, the lower portion of the marble is limited in the marble mounting hole, the upper portion of the marble extends out of the marble mounting hole, and the funnel is provided with a recessed position that cooperates with the upper portion of the marble. The present invention is configured such that when the funnel is inserted into the funnel limiting guide groove of the funnel bracket, the marble and the spring are squeezed. When the recessed position on the funnel corresponds to the marble, the rebound force of the spring lifts the marble, causing the upper portion of the marble to extend into the recessed position, thereby locking the funnel and preventing the funnel from loosening. In actual application, when the upper part of the marble extends into the concave position to clamp the funnel, the funnel pushes the slide rod to trigger the second micro switch, further indicating that the funnel is installed in place.

[0018] It should be noted that when the amount of coffee powder is greater than the specified amount, spring 2 will be compressed by the spring bracket and the pressure plate, and the spring bracket travel limit block on the spring bracket will abut against the pressure plate. When the amount of coffee powder is greater than the maximum downward stroke of the spring bracket travel limit block relative to the pressure plate, the slider is limited by the height of the movable block, and the slider cannot push the movable block downward, and the slider cannot touch the micro switch 1. After the slider triggers micro switch 1, hot water for brewing coffee can enter from the water inlet of the brewing head, and then water is discharged from the water outlet to extract coffee from the coffee powder. After the coffee is extracted, the hydraulic water is discharged, and the valve core is reset under the action of spring 4, and the slider is out of contact with the top surface of the movable block. After the movable block loses the thrust of the slider, it pushes the slider up under the action of spring 1 and returns to its original position, completing the coffee extraction action.

[0019] A coffee machine comprises a machine body, on which the above-mentioned liquid-pushing powder brewing device is provided. Beneficial effects

[0020] Beneficial effects of the present invention:

[0021] The present invention is configured such that the hydraulic component uses hydraulic means to push the powder pressing component to press and compact the coffee powder in the accommodating chamber. Compared with the existing technology, the powder pressing pressure is more stable, so that the brewed coffee tastes purer, thicker and more stable. Compared with the transmission mechanism driven by a motor or a speed change mechanism, the structure is simpler and the cost is lower. The pressure on the powder pressing component is not large and it is not easily damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a schematic cross-sectional view of the overall structure of the present invention;

[0024] Figure 3 is a schematic diagram of the overall structure of the present invention is an explosion;

[0025] Figure 4 is a schematic diagram of the present invention, the slider and the movable block assembly;

[0026] Figure 5 is a schematic diagram of the bottom of the spring bracket of the present invention;

[0027] Figure 6 is a schematic diagram of the bottom of the brew head of the present invention;

[0028] FIG7 is a schematic diagram of the top of the brewing head of the present invention.

[0029] Figure 8 is a schematic diagram of the top of the funnel support of the present invention

[0030] Figure 9 is a schematic diagram of the bottom of the funnel bracket of the present invention;

[0031] Figure 10 is a schematic side view of the funnel bracket of the present invention;

[0032] Figure 11 is a schematic diagram of the funnel of the present invention;

[0033] Figure 12 is a schematic cross-sectional view of the funnel and the funnel bracket assembly of the present invention;

[0034] Figure 13 is a schematic diagram of the present invention, the amount of coffee powder is a specified amount of work;

[0035] FIG14 is a schematic diagram showing the operation of the present invention when the amount of coffee powder is greater than a specified amount.

[0036] In the picture:

[0037] 1. Hydraulic support; 2. Micro switch 1; 3. Movable block; 31. Limit guide plate; 32. Slider limit guide groove; 33. Inclined surface 1; 4. Spring 1; 5. Spring bracket; 51. Spring 2 limit column; 52. Spring bracket travel limit block; 6. Spring 2; 7. Press plate; 8. Brewing head; 81. Sealing ring mounting groove; 82. Filter bracket mounting groove; 83. Water outlet; 84. Water inlet; 9. Filter bracket; 10. Sealing ring; 11. Filter; 12. Funnel bracket; 121. Funnel limit step; 122. Funnel limit rib; 123. Funnel limit guide groove; 124. Slider Rod mounting hole; 125, movable block limit guide groove; 126, water pipe mounting hole; 127, micro switch 2 mounting groove; 128, spring 1 limit ring groove; 129, marble mounting hole; 130, lower cavity; 131, limit ring; 132, upper cavity; 13, funnel; 131, concave position; 14, micro switch 2; 15, slide rod; 16, marble; 17, spring 3; 18, pressure plate; 19, slider; 191, inclined plane 2; 20, valve cover; 21, spring 4; 22, valve core; 23, V-shaped sealing ring; 24, valve body; 25, valve cavity; 26, hydraulic water; 27, coffee powder. Best Mode for Carrying Out the Invention

[0038] The technical solution of the present invention is described below with reference to the accompanying drawings and embodiments.

[0039] As shown in Figures 1 to 14, the present invention discloses a hydraulically-propelled powder brewing device, comprising a hopper assembly having a receiving chamber for receiving coffee powder 27; a powder pressing assembly movably mounted on the hopper assembly and corresponding to the receiving chamber; and a hydraulic assembly for driving the powder pressing assembly to press the coffee powder 27 within the receiving chamber. The present invention utilizes the hydraulic assembly to hydraulically press the powder pressing assembly to press and compact the coffee powder 27 within the receiving chamber. Compared to existing technologies, the powder pressing pressure is more stable, resulting in a richer, more stable brewed coffee. Furthermore, compared to a motor-driven transmission mechanism or a speed change mechanism, the present invention has a simpler structure, lower costs, and is not subject to significant pressure, making it less susceptible to damage.

[0040] In this embodiment, the hydraulic assembly includes a hydraulic support 1 and a valve body 24, which are fixedly connected. A valve chamber 25 is formed within the valve body 24. The valve chamber 25 has an opening at one end near the hydraulic support 1, and a valve cover 20 is fixed to the opening. A valve core 22 is disposed within the valve chamber 25. The first end of the valve core 22 is movably disposed within the valve chamber 25, and the second end of the valve core 22 is connected to a slider 19 through the valve cover 20. When hydraulic water 26 is injected into the valve chamber 25, the hydraulic water 26 pushes the first end of the valve core 22 toward the valve cover 20. When hydraulic water 26 is injected into the valve chamber 25, the hydraulic water 26 pushes the first end of the valve core 22 toward the valve cover 20, thereby causing the second end of the valve core 22 to drive the slider 19 to push the powder pressing assembly downward. In actual applications, the valve body 24 is externally connected to a hydraulic pump for injecting hydraulic water 26 into the valve chamber 25. The valve cover 20 serves to limit the range of motion of the valve core 22.

[0041] In this embodiment, the first end of the valve core 22 is sleeved with a V-shaped sealing ring 23 for cooperating with the inner wall of the valve cavity 25 to seal the hydraulic water 26. A spring 21 is also positioned between the first end of the valve core 22 and the valve cover 20. This arrangement allows the V-shaped sealing ring 23 to cooperate with the inner wall of the valve cavity 25 to seal the hydraulic water 26, thereby causing the pressure of the hydraulic water 26 to push the first end of the valve core 22 into motion. When the valve core 22 moves toward the valve cover 20, it compresses the spring 21. When the hydraulic water 26 is withdrawn, the rebound force of the spring 21 pushes the valve core 22 back into place, causing the valve core 22 to retract the slider 19 into the interior of the valve cavity 25, disengaging the powder pressing assembly.

[0042] In this embodiment, the powder pressing assembly includes a movable block 3 movably arranged on the funnel assembly, a spring bracket 5, a pressure plate 7, and a brewing head 8; the bottom of the movable block 3 abuts against the top of the spring bracket 5, and a plurality of springs 2 6 are fixed inside the spring bracket 5. The bottom of the spring 2 6 abuts against the top of the pressure plate 7, and the bottom of the pressure plate 7 abuts against the top of the brewing head 8. The bottom of the brewing head 8 is arranged corresponding to the accommodating chamber; the slider 19 of the hydraulic assembly is arranged corresponding to the movable block 3 and is used to drive the movable block 3 downward. The present invention is configured in this way that when pressing powder, the hydraulic assembly drives the movable block 3 downward, thereby driving the spring bracket 5 downward. Under the elastic force of the plurality of springs 2 6, the pressure plate 7 and the brewing head 8 are pushed downward to achieve the purpose of pressing the coffee powder 27 located in the accommodating chamber.

[0043] In this embodiment, the movable block 3 is provided with a first inclined surface 33 at one end close to the slider 19, and a second inclined surface 191 is provided at one end close to the movable block 3. The first inclined surface 33 and the second inclined surface 191 are provided correspondingly, and the inclinations of the first inclined surface 33 and the second inclined surface 191 are consistent. A limiting guide plate 31 is provided on both sides of the first inclined surface 33, and a slider limiting guide groove 32 is formed between the limiting guide plates 31 on both sides. The present invention is configured such that when the slider 19 moves toward the movable block 3, the second inclined surface 191 is in contact with the first inclined surface 33. Under hydraulic thrust, the slider 19 pushes the movable block 3 downward. The consistent inclinations of the first inclined surface 33 and the second inclined surface 191 can make the sliding planes in contact, effectively reducing plane wear under high pressure. The limiting guide plates 31 on both sides and the slider limiting guide groove 32 formed thereon are used to prevent the slider 19 from swinging when pushing the movable block 3 downward.

[0044] In this embodiment, the hydraulic support 1 is equipped with a microswitch 2 for detecting whether the slider 19 has pushed the movable block 3 into position. The present invention is configured such that when the slider 19 is directly above the movable block 3, i.e., when the slider 19 has pushed the movable block 3 downward to its maximum stroke, the microswitch 2 is triggered, halting the injection of hydraulic water 26 into the valve chamber 25. In practice, the microswitch 2 is electrically connected to the hydraulic pump used to inject hydraulic water 26 into the valve chamber 25.

[0045] In this embodiment, the funnel assembly is formed with a interconnected lower cavity 130 and upper cavity 132. The movable block 3 and spring bracket 5 are located within the upper cavity 132, while the pressure plate 7 and brewing head 8 are located within the lower cavity 130. A retaining ring 131 is provided between the lower cavity 130 and the upper cavity 132. The bottom of the retaining ring 131 corresponds to the position of the pressure plate 7, and a spring 14 is provided between the top of the retaining ring 131 and the movable block 3. This arrangement allows the hydraulic assembly's slider 19 to retract and disengage from the movable block 3 after powder compaction is completed. The movable block 3 loses its downward thrust, and the rebound force of the spring 14 pushes the movable block 3 upward.

[0046] In this embodiment, the sidewalls of the upper cavity 132 are provided with movable block limiting guide grooves 125. The movable block 3 moves vertically and is axially restrained within these grooves. The top of the limiting ring 131 is provided with a spring-limiting annular groove 128 for retaining the lower end of spring-4. This arrangement ensures that the movable block 3 can only move vertically relative to the sidewalls of the upper cavity 132 and cannot rotate axially, thereby preventing the movable block 3 from swinging during its vertical movement.

[0047] In this embodiment, the spring bracket 5 is provided with a plurality of spring second limiting posts 51 and a spring bracket travel limiting block 52. The spring second limiting post 51 is used to fix the upper end of the spring second 6, and the spring bracket travel limiting block 52 is used to limit the downward movement of the spring bracket 5 relative to the pressure plate 7. In this arrangement of the present invention, the spring bracket travel limiting block 52 is used to limit the maximum downward movement of the spring bracket 5 relative to the pressure plate 7.

[0048] In this embodiment, a water inlet 84 is provided on one side of the upper portion of the brew head 8, which is externally connected to a hot water pipeline. A water outlet 83 is provided at the bottom of the brew head 8, which is arranged corresponding to the receiving chamber of the funnel assembly. A sealing ring 10 and a filter assembly are fixed to the bottom of the brew head 8. The present invention is configured such that the sealing ring 10 is used to form a seal with the receiving chamber of the funnel assembly when the brew head 8 is pressed downward, thereby preventing powder from splashing during pressing and preventing hot water from leaking during brewing and extraction. The filter assembly is used to filter the hot water, divert the hot water, and reduce the pressure of the hot water, thereby improving the brewing and extraction effect. In actual application, the bottom of the brew head 8 is provided with a sealing ring mounting groove 81 for fixing the sealing ring 10 and a filter bracket mounting groove 82 for fixing the filter assembly. The filter assembly includes a filter bracket 9 and a filter 11. The filter 11 is fixed to the filter bracket 9, and the filter bracket 9 is fixed within the filter bracket mounting groove 82.

[0049] In this embodiment, the funnel assembly includes a funnel bracket 12 and a funnel 13. The funnel 13 is provided with a receiving cavity for accommodating coffee powder 27. The funnel 13 is detachably mounted on the funnel bracket 12. The movable block 3, spring bracket 5, pressure plate 7, and brewing head 8 of the powder pressing assembly are movably mounted on the funnel bracket 12. The funnel bracket 12 is provided with a micro switch 2 14 and a slide bar 15 for detecting whether the funnel 13 is properly installed. The slide bar 15 is arranged corresponding to the micro switch 2 14. The present invention is configured such that when the funnel 13 is pushed into the funnel bracket 12, pushing the slide bar 15 triggers the micro switch 2 14. At this time, the receiving cavity of the funnel 13 is located directly below the brewing head 8. If pushing the slide bar 15 does not trigger the micro switch 2 14 when the funnel 13 is pushed into the funnel bracket 12, it indicates that the funnel 13 is not properly installed, that is, the receiving cavity is not located directly below the brewing head 8. In actual application, the funnel bracket 12 is provided with a micro switch 2 mounting groove 127 for mounting the micro switch 2 14, a slide rod mounting hole 124 for mounting the slide rod 15, and a water pipe mounting hole 126, wherein the hot water pipe passes through the water pipe mounting hole 126 and is fixedly connected to the water inlet 84 of the brewing head 8.

[0050] In this embodiment, the funnel bracket 12 is provided with a funnel limiting step 121 and a funnel limiting rib 122, and the funnel limiting step 121 and the funnel limiting rib 122 cooperate to form a funnel limiting guide groove 123, and the funnel 13 can be detachably installed in the funnel limiting guide groove 123; the funnel limiting step 121 is provided with a marble mounting hole 129, and the bottom of the marble mounting hole 129 is sealed by a pressure plate 18, and a marble 16 and a spring three 17 are provided in the marble mounting hole 129, and the two ends of the spring three 17 are respectively abutted against the pressure plate 18 and the marble 16, and the lower part of the marble 16 is limited in the marble mounting hole 129, and the upper part of the marble 16 extends out of the marble mounting hole 129, and the funnel 13 is provided with a recessed position 131 that cooperates with the upper part of the marble 16. The present invention is configured such that when the funnel 13 is inserted into the funnel limiting guide groove 123 of the funnel bracket 12, the marble 16 and the third spring 17 are squeezed. When the recess 131 on the funnel 13 corresponds to the marble 16, the rebound force of the third spring 17 lifts the marble 16, causing the upper portion of the marble 16 to extend into the recess 131, thereby locking the funnel 13 and preventing the funnel 13 from loosening. In actual use, while the upper portion of the marble 16 extends into the recess 131 to lock the funnel 13, the funnel pushes the slide bar 15 to trigger the second microswitch 14, further indicating that the funnel 13 is properly installed.

[0051] It should be noted that when the amount of coffee powder 27 is greater than the specified amount, the spring 2 6 will be compressed by the spring bracket 5 and the pressure plate 7, and the spring bracket travel limit block 52 on the spring bracket 5 will abut against the pressure plate 7. When the amount of coffee powder 27 is greater than the maximum downward stroke of the spring bracket travel limit block 52 relative to the pressure plate 7, the slider 19 is limited by the height of the movable block 3, and the slider 19 cannot push the movable block 3 downward. At the same time, the slider 19 cannot touch the micro switch 1 2; after the slider 19 triggers the micro switch 1 2, hot water for brewing coffee can enter from the water inlet 84 of the brewing head 8, and then discharge from the water outlet 83 to extract coffee from the coffee powder 27; after the coffee is extracted, the hydraulic water 26 is discharged, and the valve core 22 is reset under the action of the spring 4 21, and the slider 19 is separated from the contact with the top surface of the movable block 3; after the movable block 3 loses the thrust of the slider 19, it pushes the slider 3 up under the action of the spring 1 4 and returns to its original position, completing the coffee extraction action.

[0052] A coffee machine comprises a machine body, on which the above-mentioned liquid-pushing powder brewing device is provided.

[0053] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which fall within the scope of protection of the present invention.

Claims

1. A device for brewing liquid-push pressed powder, characterized in that: include: A funnel assembly, the funnel assembly having a receiving cavity for receiving coffee powder; A powder pressing assembly, the powder pressing assembly being movably disposed on the funnel assembly, the powder pressing assembly being disposed corresponding to the accommodating cavity; The hydraulic component is used to push the powder pressing component to press the coffee powder in the accommodating chamber.

2. The liquid-pushing powder brewing device according to claim 1, characterized in that: The hydraulic assembly includes a hydraulic support and a valve body, the hydraulic support and the valve body are fixedly connected, a valve cavity is formed in the valve body, the valve cavity is provided with an opening at one end close to the hydraulic support, and a valve cover is fixed on the opening; a valve core is provided in the valve cavity, the first end of the valve core is movably provided in the valve cavity, the second end of the valve core is connected to a slider through the valve cover, when hydraulic water is injected into the valve cavity, the hydraulic water pushes the first end of the valve core to move toward the valve cover, and then the second end of the valve core drives the slider to push the powder pressing assembly downward; a micro switch is provided on the hydraulic support for detecting whether the slider has pushed the powder pressing assembly downward into place.

3. The liquid-pushing powder brewing device according to claim 2, characterized in that: The first end of the valve core is sleeved with a V-shaped sealing ring for cooperating with the inner wall of the valve cavity to seal the hydraulic water, and a spring four is arranged between the first end of the valve core and the valve cover.

4. The liquid-pushing powder brewing device according to claim 2, characterized in that: The powder pressing assembly includes a movable block movably arranged on the funnel assembly, a spring bracket, a pressure plate and a brewing head; the movable block abuts against the spring bracket, and a plurality of springs 2 are fixed inside the spring bracket, and the springs 2 abut against the pressure plate, and the pressure plate abuts against the brewing head, and the brewing head is arranged corresponding to the accommodating cavity; the slider of the hydraulic assembly is arranged corresponding to the movable block, and is used to drive the movable block to move downward.

5. The liquid-pushing powder brewing device according to claim 4, characterized in that: The movable block is provided with a first inclined plane, and the slider is provided with a second inclined plane. The first inclined plane and the second inclined plane are arranged correspondingly. Limiting guide plates are provided on both sides of the first inclined plane, and a slider limiting guide groove is formed between the limiting guide plates on both sides.

6. The liquid-pushing powder brewing device according to claim 4, characterized in that: A lower cavity and an upper cavity that are connected are formed in the funnel assembly, the movable block and the spring bracket are located in the upper cavity, and the pressure plate and the brewing head are located in the lower cavity; a limiting ring is provided between the lower cavity and the upper cavity, the bottom of the limiting ring is limited correspondingly to the pressure plate, and a spring is provided between the top of the limiting ring and the movable block.

7. The liquid-pushing powder brewing device according to claim 4, characterized in that: The interior of the spring bracket is provided with a plurality of spring second limiting columns and a spring bracket travel limiting block. The spring second limiting column is used to fix the upper end of spring two, and the spring bracket travel limiting block is used to limit the downward movement of the spring bracket relative to the pressure plate.

8. The liquid-pushing powder brewing device according to claim 4, characterized in that: A water inlet is provided on one side of the upper part of the brewing head, and a hot water pipeline is externally connected to the water inlet. A water outlet is provided at the bottom of the brewing head, and the water outlet is arranged corresponding to the accommodating cavity of the funnel assembly; a sealing ring and a filter assembly are fixed to the bottom of the brewing head.

9. The liquid-pushing powder brewing device according to claim 4, characterized in that: The funnel assembly includes a funnel bracket and a funnel. The funnel is provided with a accommodating cavity for accommodating coffee powder. The funnel is detachably mounted on the funnel bracket. The movable block, spring bracket, pressure plate and brewing head of the powder pressing assembly are movably arranged on the funnel bracket. A micro switch 2 and a slide rod for detecting whether the funnel is installed in place are provided on the funnel bracket. The slide rod is arranged corresponding to the micro switch 2.

10. The liquid-pushing powder brewing device according to claim 9, characterized in that: The funnel bracket is provided with a funnel limiting step and a funnel limiting rib, and the funnel limiting step and the funnel limiting rib cooperate to form a funnel limiting guide groove, and the funnel can be detachably installed in the funnel limiting guide groove; the funnel limiting step is provided with a marble mounting hole, and the bottom of the marble mounting hole is sealed by a pressure plate, and a marble and a spring three are provided in the marble mounting hole, and the two ends of the spring three are respectively abutted against the pressure plate and the marble, and the lower part of the marble is limited in the marble mounting hole, and the upper part of the marble extends out of the marble mounting hole. The funnel is provided with a recessed position that cooperates with the upper part of the marble.

11. A coffee machine, characterized in that: The invention comprises a machine body, on which is provided the brewing device for liquid-pushed compressed powder according to any one of claims 1 to 10.

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