A hydraulic system assembly for a coffee machine

Abstract

A kind of coffee machine hydraulic system assembly, including water route driving mechanism, water route driving mechanism is used to adjust water route operation;Sealing assembly, sealing assembly is used to cooperate with the sealing of extraction container, sealing assembly is communicated with water route driving mechanism, sealing assembly has the first section sealing stroke of moving towards extraction container;Powder pressing assembly, powder pressing assembly is used to cooperate with the powder pressing of extraction container, powder pressing assembly is communicated with water route driving mechanism, powder pressing assembly has the powder pressing stroke of moving under the driving of water route driving mechanism and the powder pressing treatment of coffee powder in extraction container;Extraction assembly, extraction assembly is communicated with water route driving mechanism, water route driving mechanism is transported to extraction container by extraction assembly fluid for extracting coffee.The powder pressing assembly of the present application can realize the flattening and compaction of coffee powder, and the sealing assembly is used for reliable sealing with the extraction container.

Description

Technical Field

[0001] This utility model belongs to the field of coffee machine technology, specifically relating to a hydraulic system assembly for a coffee machine. Background Technology

[0002] Among the hydraulic structures of existing coffee machines on the market, a relatively common one is a structure where the hydraulic water circuit and the coffee water circuit are separated. In this type of coffee machine, the hydraulic system starts working first when making coffee. The brew head assembly of the coffee machine is pressed down. The brew head assembly has both sealing and tamping functions. The sealing structure and the tamping structure operate completely synchronously. The brew head assembly has a sealing ring on its side. When the brew head assembly is pressed down, the sealing ring on the side of the brew head assembly makes radial sealing contact with the edge of the extraction container (such as a filter cup) before the coffee water circuit is opened to make coffee. The sealing ring on the side of the brew head assembly is easily pushed open, and after repeated contact and wear between the sealing ring and the edge of the extraction container, leakage is also likely to occur. This form is not conducive to the sealing reliability of the brew head assembly and the extraction container, which means that the coffee machine can only use coarser coffee powder to make coffee with lower extraction pressure. When using finer coffee powder, it is easy to cause overflow, which has certain limitations. Therefore, further improvement is needed. Utility Model Content

[0003] The purpose of this utility model is to overcome one of the shortcomings of the existing technology and provide a hydraulic system assembly for a coffee machine, wherein the tamping component can flatten and compact the coffee powder, and the sealing component is used to achieve a reliable seal with the extraction container.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows: A hydraulic system assembly for a coffee machine, comprising: Water circuit drive mechanism, used to regulate the operation of the water circuit; A sealing assembly is used to seal with an extraction container. The sealing assembly is connected to a water-driven mechanism and has a first sealing stroke that moves toward the extraction container under the drive of the water-driven mechanism. The tamping assembly is used to tamp coffee powder in conjunction with the extraction container. The tamping assembly is connected to the water drive mechanism and has a tamping stroke that moves under the drive of the water drive mechanism to tamp the coffee powder in the extraction container. The extraction component is connected to the water drive mechanism, which delivers the coffee extraction fluid to the extraction container through the extraction component.

[0005] In a further embodiment of the present invention, the sealing assembly includes a sealing hydraulic cylinder, the sealing hydraulic cylinder includes a sealing cylinder body and a sealing element disposed on the sealing cylinder body, driven by a water circuit drive mechanism and used for sealing cooperation with the extraction container, the sealing element and the end face of the extraction container are sealed together, and a first sealing ring for cooperation with the extraction container is provided on the end face of the sealing element. When the first sealing stroke is completed, the sealing component is in sealed contact with the extraction container. Alternatively, when the first sealing stroke is completed, the sealing component is spaced apart from the extraction container and is not in sealed contact. The powder pressing component and the sealing component are connected by a drive so that when the powder pressing component performs the powder pressing stroke, it simultaneously drives the sealing component to move further until it is in sealed contact with the extraction container.

[0006] In a further embodiment of the present invention, the powder pressing assembly includes a powder pressing hydraulic cylinder, the powder pressing hydraulic cylinder includes a powder pressing cylinder body and a powder pressing element disposed on the powder pressing cylinder body, which is driven by a water-driven mechanism and used to cooperate with the extraction container to press powder. The sealing assembly and the powder pressing assembly can move relative to each other. The powder pressing assembly is connected to the sealing assembly so that when the powder pressing assembly is in the powder pressing stroke, it applies a force toward the extraction container, thereby pressurizing and sealing the extraction container.

[0007] In a further embodiment of this utility model, the sealing element is located on the periphery of the powder pressing element, the sealing element and the powder pressing element are coaxially arranged, the sealing cylinder and the powder pressing cylinder are integrated to form a total cylinder, the sealing cylinder is located on the periphery of the powder pressing cylinder, and the extraction component is integrated on the total cylinder. The extraction assembly includes an extraction water path whose input end is connected to the water path drive mechanism. The extraction water path is integrated into the main cylinder. The output end of the extraction water path extends to the tamping element and delivers the fluid for extracting coffee to the extraction container.

[0008] In a further embodiment of this utility model, the sealing hydraulic cylinder includes a first spring for retracting and resetting the sealing element. The first spring is located between the sealing cylinder body and the sealing element. The sealing element is provided with a second sealing ring located between the sealing element and the sealing cylinder body. The sealing cylinder body is provided with a first cavity. The sealing element is movably disposed on the first cavity. The first spring and the second sealing ring are located in the first cavity. The water-driven mechanism is connected to the first cavity. At least part of the sealing element and the first sealing ring are located outside the sealing cylinder body. The powder pressing hydraulic cylinder includes a second spring for the retraction and reset of the powder pressing element, a third sealing ring located between the powder pressing cylinder body and the powder pressing element, a second cavity inside the powder pressing cylinder body, and a water-driven mechanism connected to the second cavity.

[0009] In a further embodiment of this utility model, the powder pressing cylinder is fixedly connected to the powder pressing element so as to move synchronously with the powder pressing element. When the powder pressing element performs the powder pressing stroke, it synchronously drives the powder pressing cylinder and the sealing cylinder to move. During the movement of the sealing cylinder, the water in the first chamber applies a force toward the extraction container to the sealing element, so that the sealing element pressurizes and seals the extraction container. The powder pressing hydraulic cylinder includes a push rod whose inner end extends into a second cavity. The inner end of the push rod is provided with a piston head opposite to the powder pressing element. The push rod has a liquid channel that extends through to the powder pressing element and through both ends of the push rod. A water-driven mechanism is connected to the second cavity through the liquid channel. The water-driven mechanism adjusts the amount of water between the powder pressing element and the piston head through the liquid channel to make the powder pressing element and the piston head move relative to each other. A second spring is located between the piston head and the powder pressing cylinder body. A fourth sealing ring is provided on the piston head between the piston head and the powder pressing cylinder body. The powder pressing hydraulic cylinder also includes a bracket. The outer end of the push rod is fixed to the bracket. A fifth sealing ring is provided between the push rod and the bracket.

[0010] In a further embodiment of this utility model, the first cavity is located outside the second cavity, and the extraction water path is located between the first cavity and the second cavity; The main cylinder body is provided with a first pipe joint connecting the first chamber and the water drive mechanism and a second pipe joint connecting the extraction water circuit and the water drive mechanism. The bracket is provided with a third pipe joint connecting the second chamber and the water drive mechanism. The hydraulic system assembly also includes a detection switch for detecting that the powder pressing component has reached the last position of the powder pressing stroke. The detection switch is set on the bracket, and the powder pressing cylinder body is provided with a contact element that cooperates with the detection switch. The sealing element is tubular, with an inner positioning platform at the inner end of the sealing element, a second sealing ring set on the inner positioning platform, an outer positioning platform at the outer end of the sealing element, a first sealing ring embedded on the end face of the outer positioning platform, and a first spring fitted on the sealing element, with the upper and lower ends of the first spring abutting against the inner positioning platform and the sealing cylinder respectively. The powder pressing element includes a hydraulic seat, a water guide cover, and a water distribution screen arranged axially in sequence. The hydraulic seat is opposite to the piston head. The water guide cover has a water channel connecting the extraction water channel and the extraction container. The side of the water guide cover is provided with a powder scraping sealing ring. The water channel is L-shaped and extends from the outside of the water guide cover to the middle of the water guide cover, and the extraction water channel is away from the axis of the main cylinder and offset to the side of the main cylinder. The third sealing ring is provided on the hydraulic seat, and the sixth sealing ring is provided between the hydraulic seat and the water guide cover.

[0011] In a further embodiment of the present invention, the water circuit drive mechanism includes a first sealing water circuit connected to the sealing component, a second tamping water circuit connected to the tamping component, and a third coffee water circuit connected to the extraction component. Each of the first sealing water circuit, the second tamping water circuit, and the third coffee water circuit is provided with a solenoid valve for controlling the opening and closing of the water circuit. The water circuit drive mechanism also includes a pressure relief water circuit, which is connected to the first sealing water circuit, the second tamping water circuit, and the third coffee water circuit. The head end of the solenoid valve is connected to the pressure relief water circuit. The pressure relief water circuit includes a pressure relief box and a water receiving tray connected to the output end of the pressure relief box. The input end of the pressure relief box is connected to the first sealing water circuit, the second tamping water circuit, and the third coffee water circuit. The extraction container has an inlet. The outer diameter of the first sealing ring is larger than the outer diameter of the inlet of the extraction container. The inner diameter of the first sealing ring is smaller than the outer diameter of the inlet of the extraction container but larger than the inner diameter of the inlet of the extraction container. The inlet has an outwardly extending edge. The outer diameter of the edge is used as the outer diameter of the inlet, and the inner diameter of the edge is used as the inner diameter of the inlet. After the first sealing stroke is completed, the powder pressing stroke is performed.

[0012] The beneficial effects of the utility model are as follows: The tamping component of the hydraulic system assembly of this coffee machine can flatten and compact the coffee powder, and has higher sealing reliability between the sealing component and the extraction container. It can adapt to coffee powder of different coarseness and make more kinds of coffee, meet consumers' requirements for different coffees, and improve consumers' user experience. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of some embodiments of the present utility model.

[0014] Figure 2 This is an exploded view of some embodiments of the present invention.

[0015] Figure 3 This is a schematic diagram of the operation of the sealing assembly in some embodiments of this utility model.

[0016] Figure 4 This is a schematic diagram of the operation of the sealing assembly in some embodiments of this utility model.

[0017] Figure 5 This is a schematic diagram of the structure in some embodiments of the present invention.

[0018] Figure 6 This is a schematic diagram of the operation of the powder pressing component in some embodiments of this utility model.

[0019] Figure 7 This is a schematic diagram of the operation of the extraction component in some embodiments of this utility model.

[0020] Figure 8 This is a schematic diagram of the operation of the powder pressing component in some embodiments of this utility model.

[0021] Figure 9 The diagram shows some embodiments of this utility model. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] like Figure 1-9 As shown, this coffee machine hydraulic system assembly, which can be applied to coffee machines with automatic tamping and extraction, includes: Water circuit drive mechanism 1, which is used to regulate the operation of the water circuit; Sealing assembly 2 is used to seal with extraction container 3. Sealing assembly 2 is connected to water channel drive mechanism 1. Sealing assembly 2 has a first sealing stroke that moves towards extraction container 3 under the drive of water channel drive mechanism 1. Figure 3 As shown, the water-driven mechanism 1 supplies water to the sealing assembly 2. Figure 3 (The arrow indicates the water supply direction), causing sealing assembly 2 to perform the first sealing stroke; The tamping assembly 4 is used to tamp coffee powder in conjunction with the extraction container 3. The tamping assembly 4 is connected to the water drive mechanism 1 and has a tamping stroke that moves under the drive of the water drive mechanism 1 to tamp the coffee powder in the extraction container 3. Figure 6 As shown, the water-driven mechanism 1 supplies water to the powder-pressing assembly 4. Figure 6 (The arrow indicates the water supply direction), causing the powder pressing component 4 to perform the powder pressing stroke, pressing the powder pressing component 4 down into the extraction container 3; Extraction component 5 is connected to water channel drive mechanism 1. Water channel drive mechanism 1 delivers the fluid for coffee extraction to extraction container 3 through extraction component 5. Figure 6 As shown, the water-driven mechanism 1 supplies water to the extraction assembly 5. Figure 6 (The arrow indicates the direction of water supply), water enters the extraction container 3 to achieve coffee extraction.

[0024] In some embodiments of this utility model, such as Figure 2 , 3 As shown, the sealing assembly 2 includes a sealing hydraulic cylinder, which includes a sealing cylinder body 21 and a sealing element 22 disposed on the sealing cylinder body 21, driven by the water circuit drive mechanism 1, and used for sealing cooperation with the extraction container 3, such as... Figure 4 , 6As shown, the sealing element 22 is pressed down onto the extraction container 3 and seals with it. The sealing element 22 and the end face of the extraction container 3 are sealed together. The end face seal is more reliable and has a better sealing effect than the radial seal in the prior art. The extraction container 3 can withstand greater water pressure without leakage. It is easier to extract oils from coffee and is suitable for coffee with high extraction pressure and fine coffee powder. The end face of the sealing element 22 is provided with a first sealing ring 23 for cooperating with the extraction container 3. When the first sealing ring 23 located on the end face cooperates with the end face of the extraction container 3, the friction is small. The first sealing ring 23 wears little after long-term use, which is beneficial to the long-term sealing reliability.

[0025] In some embodiments of this utility model, such as Figure 2 , 5 As shown in Figure 6, the powder pressing assembly 4 includes a powder pressing hydraulic cylinder, which includes a powder pressing cylinder body 41 and a powder pressing element 42 mounted on the powder pressing cylinder body 41, driven by the water circuit drive mechanism 1 and used to press powder in conjunction with the extraction container 3. Figure 6 As shown, the powder pressing element 42 enters the extraction container 3 to press the powder. The sealing component 2 and the powder pressing component 4 can move relative to each other. The sealing component 2 and the powder pressing component 4 can operate asynchronously. The sealing component 2 can first complete the first sealing stroke, and then the powder pressing component 4 completes the powder pressing stroke. like Figure 4 As shown, when the first sealing stroke is completed, the sealing component 2 and the extraction container 3 are in sealed contact. That is, the sealing component 2 can complete the sealing contact with the extraction container 3 by relying on a single stroke (i.e., the first sealing stroke). This method is simple to control and easy to implement. Alternatively, when the first sealing stroke is completed, the sealing component 2 and the extraction container 3 are spaced apart and not in sealed contact, as shown. Figure 6 As shown, the powder pressing component 4 and the sealing component 2 are connected by a drive, so that when the powder pressing component 4 performs the powder pressing stroke, it simultaneously drives the sealing component 2 to move further until it comes into sealing contact with the extraction container 3. This arrangement helps to reduce the relative movement distance between the sealing component 2 and the powder pressing component 4, which is beneficial to the compact and miniaturized design of the structure.

[0026] The tamping assembly 4 is connected to the sealing assembly 2, so that when the tamping assembly 4 is in the tamping stroke, it applies a force toward the extraction container 3 to the sealing assembly 2, which increases the pressure of the sealing element 22 on the extraction container 3, and makes the sealing assembly 2 pressurize and seal the extraction container 3. This is beneficial to the reliability of the seal, and the sealing effect is better. It allows the extraction container 3 to withstand greater water pressure without leakage, and makes it easier to extract the oils in the coffee, adapt to coffee with high extraction pressure and fine coffee powder.

[0027] In some embodiments of this utility model, such as Figure 5 ,6 As shown, the sealing element 22 is located around the powder pressing element 42. The sealing element 22 and the powder pressing element 42 are coaxially arranged so that the sealing element 22 and the powder pressing element 42 can respectively cooperate with the extraction container 5. The sealing cylinder 21 and the powder pressing cylinder 41 are integrated to form the total cylinder. This arrangement is beneficial to reducing the number of parts and to structural integration and compactness. The sealing cylinder 21 is located around the powder pressing cylinder 41. The extraction component 5 is integrated on the total cylinder. This arrangement is also beneficial to reducing the number of parts and to structural integration and compactness.

[0028] like Figure 7 As shown, the extraction assembly 5 includes an extraction water passage 51 whose input end is connected to the water passage drive mechanism 1. The extraction water passage 51 is integrated into the main cylinder. The output end of the extraction water passage 51 extends to the tamping element 42 and delivers the fluid for extracting coffee to the extraction container 3, so that water can be quickly supplied to the extraction container 5 through the extraction assembly 5 after the tamping element 42 has completed tamping.

[0029] In some embodiments of this utility model, such as Figure 2 , 3 As shown, the sealing hydraulic cylinder includes a first spring 24 for the retraction and reset of the sealing element 22. After the water drive mechanism 1 stops supplying water to the sealing assembly 2, the first spring 24 drives the sealing element 22 to retract and reset. Simultaneously, given the use of an end-face seal, the resistance of the first sealing ring 23 is small when the sealing element 22 retracts. Therefore, the first spring 24 can use parameters with even smaller elastic force to achieve normal retraction of the sealing element 22. The first spring 24 is located between the sealing cylinder body 21 and the sealing element 22. A second sealing ring 25 is provided on the sealing element 22, located between the sealing element 22 and the sealing cylinder body 21. A first cavity 26 is provided inside the sealing cylinder body 21, and the sealing element 22 is movably mounted on the first cavity 26. The first spring 24 and the second sealing ring 25 are located within the first cavity 26. The water drive mechanism 1 communicates with the first cavity 26. Figure 4 , 6 As shown, the first cavity 26 contains the water supply input from the water circuit drive mechanism 1. Figure 4 , 6 (The wavy line in the text represents water). The water drive mechanism 1 drives the sealing element 22 to operate by supplying water to the first cavity 26 and achieves a sealing fit with the extraction container 5. At least part of the sealing element 22 and the first sealing ring 23 are located outside the sealing cylinder 21 for fitting with the extraction container 5.

[0030] like Figure 5 , 6As shown, the powder pressing hydraulic cylinder includes a second spring 43 for the retraction and reset of the powder pressing element 42. After the water circuit drive mechanism 1 stops supplying water to the powder pressing assembly 4, the second spring 43 drives the powder pressing element 42 to retract and reset. The powder pressing element 42 is provided with a third sealing ring 44 located between the powder pressing cylinder body 41 and the powder pressing element 42. The powder pressing cylinder body 41 is provided with a second cavity 45, and the water circuit drive mechanism 1 communicates with the second cavity 45. Figure 6 As shown, the second cavity 45 contains the water supply input from the water circuit drive mechanism 1. Figure 6 (The wavy lines in the text represent water). The water-driven mechanism 1 drives the powder pressing element 42 to operate and press powder by supplying water to the second cavity 45.

[0031] In some embodiments of this utility model, such as Figure 5 , 6 As shown, the powder pressing cylinder 41 is fixedly connected to the powder pressing element 42 to move synchronously with the powder pressing element 42. Since the sealing cylinder 21 and the powder pressing cylinder 41 are integrated, the powder pressing element 42 drives the powder pressing cylinder 41 and the sealing cylinder 21 to move synchronously when it performs the powder pressing stroke. During the movement of the sealing cylinder 21, the water in the first chamber 26 applies a force to the sealing element 22 toward the extraction container 3, so that the sealing element 22 pressurizes and seals the extraction container 3, further improving the sealing reliability of the sealing assembly 2 and the extraction container 5. When the sealing cylinder 21 moves, it compresses the first chamber 26, reducing the capacity of the first chamber 26. When the sealing cylinder 21 descends to the lowest point with the powder pressing cylinder 41, the capacity of the first chamber 26 reaches the minimum value, so that the water content in the first chamber 26 is reduced to the minimum during pressurization and sealing, reducing the water content requirement of the first chamber 26 during pressurization and sealing.

[0032] The powder-pressing hydraulic cylinder includes a push rod 46 whose inner end extends into the second cavity 45. The inner end of the push rod 46 is provided with a piston head 47 opposite to the powder-pressing element 42. A liquid channel 461 is provided inside the push rod 46, extending to both ends of the push rod 46. A water-driven mechanism 1 communicates with the second cavity 45 through the liquid channel 461. The water-driven mechanism 1 adjusts the amount of water between the powder-pressing element 42 and the piston head 47 through the liquid channel 461 to allow relative movement between the powder-pressing element 42 and the piston head 47. In this embodiment, the push rod 46 and the piston head 47 are fixed. The tamping element 42 moves, and the second spring 43 is located between the piston head 47 and the tamping cylinder 41. After the water drive mechanism 1 stops supplying water to the tamping assembly 4, the second spring 43 drives the tamping cylinder 41 and the tamping element 42 to retract and reset. The piston head 47 is provided with a fourth sealing ring 48 located between the piston head 47 and the tamping cylinder 41. The tamping hydraulic cylinder also includes a bracket 49. The outer end of the push rod 46 is fixed to the bracket 49. A fifth sealing ring 40 is provided between the push rod 46 and the bracket 49. The bracket 49 is used to fix it on the coffee machine so that the push rod 46 and the piston head 47 are fixedly set.

[0033] In some embodiments of this utility model, such as Figure 5 , 6 As shown, the first chamber 26 is located outside the second chamber 45, and the extraction water channel 51 is located between the first chamber 26 and the second chamber 45, realizing the arrangement of the first chamber 26, the second chamber 45, and the extraction water channel 51 on the main cylinder. The main cylinder integrates the sealing assembly 2, the powder pressing assembly 4, and the extraction assembly 5.

[0034] The main cylinder body is provided with a first pipe joint 61 connecting the first cavity 26 and the water drive mechanism 1, and a second pipe joint 62 connecting the extraction water channel 51 and the water drive mechanism 1. The bracket 49 is provided with a third pipe joint 491 connecting the second cavity 45 and the water drive mechanism 1. The first pipe joint 61, the second pipe joint 62, and the third pipe joint 491 facilitate water channel connection. The hydraulic system assembly also includes a detection switch 492 for detecting that the powder pressing component 4 has reached the last position of the powder pressing stroke. The detection switch 492 is set on the bracket 49. The powder pressing cylinder body 41 is provided with a contact 493 that cooperates with the detection switch 492. Of course, it can be further configured. The hydraulic system assembly also includes a detector for detecting that the sealing component 2 has reached the last position of the first stage of sealing formation. The detector is set on the bracket 49. The sealing element 22 is provided with a trigger part that cooperates with the detector.

[0035] like Figure 2 , 3 As shown, the sealing element 22 is tubular, allowing it to be positioned around the powder pressing element 42. The inner end of the sealing element 22 is provided with an inner positioning platform 221, and the second sealing ring 25 is positioned on the inner positioning platform 221. The outer end of the sealing element 22 is provided with an outer positioning platform 222, and the first sealing ring 23 is embedded in the end face of the outer positioning platform 222. The first spring 24 is fitted onto the sealing element 22, and the upper and lower ends of the first spring 24 abut against the inner positioning platform 221 and the sealing cylinder 21, respectively. like Figure 2 , 5 As shown in Figure 6, the powder pressing element 42 includes a hydraulic seat 421, a water guide cover 422, and a water distribution net 423 arranged axially in sequence. The water distribution net 423 is used to evenly distribute water and output it to the extraction container 5. The hydraulic seat 421 is opposite to the piston head 47. The water guide cover 422 is provided with a water channel 4221 that connects the extraction water channel 51 and the extraction container 3. The side of the water guide cover 422 is provided with a powder scraping sealing ring 424 to ensure that the powder pressing element 42 can scrape the powder off the side of the extraction container 5 when it is pressed down. The water channel 4221 is L-shaped and extends from the outside of the water guide cover 422 to the middle of the water guide cover 422, and makes the extraction water channel 51 away from the axis of the main cylinder and offset to the side of the main cylinder, so as to facilitate the integration of the extraction component 5 and the extraction water channel 51 on the main cylinder. The third sealing ring 44 is provided on the hydraulic seat 421, and the sixth sealing ring 425 is provided between the hydraulic seat 421 and the water guide cover 422.

[0036] In some embodiments of this utility model, such as Figure 9 As shown, the water circuit drive mechanism 1 includes a first sealing water circuit 11 connected to the sealing component 2, a second tamping water circuit 12 connected to the tamping component 4, and a third coffee water circuit 13 connected to the extraction component 5. The extraction component 5 uses a separate water circuit (i.e., the third coffee water circuit 13), which has the advantage of low pressure loss. The first sealing water circuit 11, the second tamping water circuit 12, and the third coffee water circuit 13 are each equipped with a solenoid valve 14 for controlling the opening and closing of the water circuit, so as to realize the adjustment and control of the sealing component 2, the tamping component 4, and the extraction component 5. The input end of the solenoid valve 14 is connected to the water pump of the coffee machine.

[0037] The water circuit drive mechanism 1 also includes a pressure relief water circuit 15, which is connected to the first sealing water circuit 11, the second tamping water circuit 12, and the third coffee water circuit 13. The first end of the solenoid valve 14 is connected to the pressure relief water circuit 15. The pressure relief water circuit 15 includes a pressure relief box 151 and a water receiving tray 152 connected to the output end of the pressure relief box 151. The input end of the pressure relief box 151 is connected to the first sealing water circuit 11, the second tamping water circuit 12, and the third coffee water circuit 13. The pressure relief water circuit 15 is used to receive pressure relief drainage to prevent the water pressure from dropping during the reset process, which would cause wastewater to remain in the extraction container 5 because it cannot pass through the coffee powder cake, thus reducing the water retention in the extraction container 5.

[0038] First, when the hydraulic system assembly of this coffee machine is running, the water pump of the coffee machine starts to supply water, the solenoid valve of the first sealed water circuit 11 opens, and the water reaches the first chamber 26 of the sealed hydraulic cylinder through the solenoid valve. The sealing component 2 performs the first sealing stroke, and the sealing element 22 presses down against the force of the first spring 24. After the first sealing stroke is completed, the solenoid valve closes, and the water pressure inside the first chamber 26 remains unchanged because the solenoid valve is closed. The first scenario: When the hydraulic system assembly of this coffee machine is designed such that after the first sealing stroke is completed, the sealing component 2 makes sealing contact with the extraction container 3, thus sealing the extraction container 5. The solenoid valve closes, and the water pressure inside the first chamber 26 remains constant due to the closure of the solenoid valve, maintaining the seal on the extraction container 5. The second scenario: When the hydraulic system assembly of this coffee machine is designed such that there is a gap between the sealing component 2 and the extraction container 3 after the first sealing stroke is completed, the sealing component 2 has not yet made sealing contact with the extraction container 5, and the solenoid valve closes. Then, the solenoid valve of the second tamping water circuit 12 opens, and water flows through the solenoid valve to the second chamber 45 of the tamping hydraulic cylinder. The tamping assembly 4 performs the tamping stroke, and the tamping element 42 and the tamping cylinder 41 press down against the force of the second spring 43. The tamping element 42 (specifically the water distribution network 423) squeezes the coffee powder in the extraction container 5 downwards, making the coffee powder flat and compacted. Since the sealing cylinder 21 and the tamping cylinder 41 are integrated, when the tamping cylinder 41 moves downwards, it drives the sealing cylinder 21 to move downwards. In the first case, the sealing element 22 pressurizes and seals the extraction container 5. In the second case, when the tamping assembly 4 performs the tamping stroke, it simultaneously... The sealing assembly 2 is driven to move the sealing element 22 of the sealing cylinder 21 further until it comes into sealing contact with the extraction container 3, and then the sealing element 22 pressurizes and seals the extraction container 5. Since the water inside the first chamber 26 of the sealing cylinder 21 is difficult to compress under the pressurized sealing state, the excess wastewater is discharged to the pressure relief water passage 15 through the solenoid valve of the first sealing water passage 11. The solenoid valve of the first sealing water passage 11 actively releases pressure by actively switching to the open state. After the tamping is completed, the solenoid valve of the second tamping water passage 12 is closed. At this time, the water pressure inside the second chamber 45 remains unchanged because the solenoid valve is closed, maintaining the compression of the coffee powder. Next, the solenoid valve of the third coffee water path 13 is opened, and water is output to the extraction container 5 through the solenoid valve, the extraction water path 51 of the extraction component 5, the water guide cover 422 of the tamping element 42, and the water distribution net 423, thereby realizing the extraction of coffee.

[0039] Finally, after coffee extraction is complete, all solenoid valves open, and the water in the water circuit is discharged into the pressure relief water circuit 15. The solenoid valve of the third coffee water circuit 13 is a three-way solenoid valve. When depressurizing, the solenoid valve of the third coffee water circuit 13 opens the pressure relief port to release pressure, and the sealing component 2 and the tamping component 4 retract to their original positions.

[0040] like Figure 3 , 6 As shown, the extraction container 3 has an inlet. The outer diameter of the first sealing ring 23 is larger than the outer diameter of the inlet of the extraction container 3, and the inner diameter of the first sealing ring 23 is smaller than the outer diameter of the inlet of the extraction container 3 but larger than the inner diameter of the inlet of the extraction container 3. This arrangement is beneficial to increasing the sealing contact area between the first sealing ring 23 and the extraction container 3, which is beneficial to the sealing reliability. Even if there is an eccentricity between the extraction container 3 and the sealing component 2, the outer diameter of the first sealing ring 23 can still cover it and prevent water leakage. The inlet has an outwardly extending edge 31. The outer diameter of the edge 31 serves as the outer diameter of the inlet, and the inner diameter of the edge 31 serves as the inner diameter of the inlet. After the first sealing stroke is completed, the powder pressing stroke is performed.

[0041] The operation method of this coffee machine's hydraulic system assembly includes the following steps: Step 1: The water-driven mechanism 1 drives the sealing assembly 2 to perform the first sealing stroke, and the sealing assembly 2 moves towards the extraction container 3, as shown. Figure 3 As shown, the water-driven mechanism 1 supplies water to the sealing assembly 2. Figure 3 The arrow indicates the direction of water supply, causing sealing assembly 2 to begin the first stage of the sealing stroke; Step 2: The water-driven mechanism 1 drives the tamping assembly 4 to perform the tamping stroke, causing the tamping assembly 4 to tamp the coffee powder in the extraction container 3. Figure 6 As shown, the water-driven mechanism 1 supplies water to the powder-pressing assembly 4. Figure 6 The arrow indicates the water supply direction, causing the powder pressing component 4 to perform the powder pressing stroke, pressing the powder pressing component 4 down into the extraction container 3; like Figure 4 As shown, after the first sealing stroke is completed, the sealing component 2 and the extraction container 3 are in sealed contact. That is, the sealing component 2 can complete the sealing contact with the extraction container 3 by relying on a single stroke (i.e., the first sealing stroke). This method is simple to control and easy to implement. Alternatively, when the first sealing stroke is completed, there is a gap between the sealing component 2 and the extraction container 3 and they are not in sealed contact. Figure 6 As shown, the powder pressing component 4 and the sealing component 2 are connected by a drive, so that when the powder pressing component 4 performs the powder pressing stroke, it simultaneously drives the sealing component 2 to move further until it comes into sealing contact with the extraction container 3. This arrangement helps to reduce the relative movement distance between the sealing component 2 and the powder pressing component 4, which is beneficial to the compact and miniaturized design of the structure.

[0042] Step 3: After the tamping process is completed, the water-driven mechanism 1 delivers the coffee-extracting fluid to the extraction container 3 via the extraction component 5 to achieve coffee preparation. Figure 6 As shown, the water-driven mechanism 1 supplies water to the extraction assembly 5. Figure 6 (The arrow indicates the direction of water supply), water enters the extraction container 3 to achieve coffee extraction.

[0043] Step 4: After the coffee is brewed, the water circuit drive mechanism 1 disengages, and the sealing component 2 and the tamping component 4 retract to their original positions. Figure 8 As shown, the water drive mechanism 1 no longer supplies water to the sealing assembly 2 and the powder pressing assembly 4, and the sealing assembly 2 and the powder pressing assembly 4 retract.

[0044] In some embodiments of the present invention, the sealing component 2 and the end face of the extraction container 3 are sealed together. The end face sealing is more reliable and has a better sealing effect than the radial sealing in the prior art. The end face of the sealing component 2 is provided with a sealing part for cooperating with the extraction container 3. In this embodiment, the sealing part is a sealing element 22 with a first sealing ring 23 on the end face.

[0045] The tamping assembly 4 is connected to the sealing assembly 2, so that when the tamping assembly 4 is in the tamping stroke, it applies a force toward the extraction container 3 to the sealing assembly 2, which increases the pressure of the sealing assembly 2 on the extraction container 3. This makes the sealing assembly 2 pressurize and seal the extraction container 3, which is beneficial to the reliability of the seal and the sealing effect. It also allows the extraction container 3 to withstand greater water pressure without leakage, making it easier to extract the oils in the coffee and adapting to coffee with high extraction pressure and fine coffee powder.

[0046] The water-driven mechanism 1 has a pressure relief water passage 15, which is connected to the sealing assembly 2, the powder pressing assembly 4, and the extraction assembly 5 and is used for pressure relief and drainage.

[0047] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A hydraulic system assembly for a coffee machine, characterized in that, include: Waterway drive mechanism (1), the waterway drive mechanism (1) is used to regulate the operation of the waterway; The sealing assembly (2) is used to seal with the extraction container (3). The sealing assembly (2) is connected to the water drive mechanism (1). The sealing assembly (2) has a first sealing stroke that moves toward the extraction container (3) under the drive of the water drive mechanism (1). The tamping assembly (4) is used to tamp coffee powder in conjunction with the extraction container (3). The tamping assembly (4) is connected to the water drive mechanism (1). The tamping assembly (4) has a tamping stroke that moves under the drive of the water drive mechanism (1) and tamps the coffee powder in the extraction container (3). The extraction component (5) is connected to the water drive mechanism (1), which delivers the fluid for extracting coffee to the extraction container (3) through the extraction component (5).

2. The coffee machine hydraulic system assembly according to claim 1, characterized in that, The sealing assembly (2) includes a sealing hydraulic cylinder, which includes a sealing cylinder body (21) and a sealing element (22) disposed on the sealing cylinder body (21), driven by the water circuit drive mechanism (1) and used to seal with the extraction container (3). The sealing element (22) and the end face of the extraction container (3) are sealed together. A first sealing ring (23) is provided on the end face of the sealing element (22) for cooperating with the extraction container (3). When the first sealing stroke is completed, the sealing component (2) is in sealed contact with the extraction container (3). Alternatively, when the first sealing stroke is completed, the sealing component (2) and the extraction container (3) are spaced apart and not in sealed contact. The powder pressing component (4) is connected to the sealing component (2) so that when the powder pressing component (4) performs the powder pressing stroke, it simultaneously drives the sealing component (2) to move further until it is in sealed contact with the extraction container (3).

3. The coffee machine hydraulic system assembly according to claim 2, characterized in that, The powder pressing assembly (4) includes a powder pressing hydraulic cylinder, which includes a powder pressing cylinder body (41) and a powder pressing element (42) mounted on the powder pressing cylinder body (41), driven by a water-driven mechanism (1) and used to press powder in conjunction with the extraction container (3). The sealing assembly (2) and the powder pressing assembly (4) can move relative to each other. The powder pressing assembly (4) is connected to the sealing assembly (2) so that when the powder pressing assembly (4) performs the powder pressing stroke, it applies a force toward the extraction container (3) to the sealing assembly (2), so that the sealing assembly (2) pressurizes and seals the extraction container (3).

4. The coffee machine hydraulic system assembly according to claim 3, characterized in that, The sealing element (22) is located on the periphery of the powder pressing element (42). The sealing element (22) and the powder pressing element (42) are coaxially arranged. The sealing cylinder (21) and the powder pressing cylinder (41) are integrated to form a total cylinder. The sealing cylinder (21) is located on the periphery of the powder pressing cylinder (41). The extraction component (5) is integrated on the total cylinder. The extraction assembly (5) includes an extraction water path (51) whose input end is connected to the water path drive mechanism (1). The extraction water path (51) is integrated in the main cylinder. The output end of the extraction water path (51) extends to the tamping element (42) and delivers the fluid for extracting coffee to the extraction container (3).

5. The coffee machine hydraulic system assembly according to claim 4, characterized in that, The sealing hydraulic cylinder includes a first spring (24) for retracting and resetting the sealing element (22). The first spring (24) is located between the sealing cylinder body (21) and the sealing element (22). The sealing element (22) is provided with a second sealing ring (25) located between the sealing element (22) and the sealing cylinder body (21). The sealing cylinder body (21) is provided with a first cavity (26). The sealing element (22) is movably disposed on the first cavity (26). The first spring (24) and the second sealing ring (25) are located in the first cavity (26). The water drive mechanism (1) is connected to the first cavity (26). At least part of the sealing element (22) and the first sealing ring (23) are located outside the sealing cylinder body (21). The powder pressing hydraulic cylinder includes a second spring (43) for the retraction and reset of the powder pressing element (42). The powder pressing element (42) is provided with a third sealing ring (44) located between the powder pressing cylinder body (41) and the powder pressing element (42). The powder pressing cylinder body (41) is provided with a second cavity (45). The water drive mechanism (1) is connected to the second cavity (45).

6. The coffee machine hydraulic system assembly according to claim 5, characterized in that, The pressing cylinder (41) is fixedly connected to the pressing element (42) to move synchronously with the pressing element (42). When the pressing element (42) performs the pressing stroke, it synchronously drives the pressing cylinder (41) and the sealing cylinder (21) to move. During the movement of the sealing cylinder (21), the water in the first chamber (26) applies a force toward the extraction container (3) to the sealing element (22), so that the sealing element (22) pressurizes and seals the extraction container (3). The hydraulic cylinder for pressing powder includes a push rod (46) with its inner end extending into the second cavity (45). The inner end of the push rod (46) is provided with a piston head (47) opposite to the pressing element (42). The push rod (46) has a liquid channel (461) extending through to the pressing element (42). The liquid channel (461) passes through both ends of the push rod (46). A water-driven mechanism (1) is connected to the second cavity (45) through the liquid channel (461). The water-driven mechanism (1) adjusts the pressing element (42) through the liquid channel (461). The amount of water between the 42) and the piston head (47) is used to make the powder pressing element (42) and the piston head (47) move relative to each other. The second spring (43) is located between the piston head (47) and the powder pressing cylinder (41). The piston head (47) is provided with a fourth sealing ring (48) located between the piston head (47) and the powder pressing cylinder (41). The powder pressing hydraulic cylinder also includes a bracket (49). The outer end of the push rod (46) is fixed to the bracket (49). A fifth sealing ring (40) is provided between the push rod (46) and the bracket (49).

7. The coffee machine hydraulic system assembly according to claim 6, characterized in that, The first cavity (26) is located outside the second cavity (45), and the extraction water channel (51) is located between the first cavity (26) and the second cavity (45); The main cylinder is provided with a first pipe joint (61) connecting the first cavity (26) and the water drive mechanism (1) and a second pipe joint (62) connecting the extraction water path (51) and the water drive mechanism (1). The bracket (49) is provided with a third pipe joint (491) connecting the second cavity (45) and the water drive mechanism (1). The hydraulic system assembly also includes a detection switch (492) for detecting that the powder pressing assembly (4) has reached the last position of the powder pressing stroke. The detection switch (492) is set on the bracket (49), and the powder pressing cylinder (41) is provided with a contact (493) that cooperates with the detection switch (492). The sealing element (22) is tubular. The inner end of the sealing element (22) is provided with an inner positioning platform (221). The second sealing ring (25) is set on the inner positioning platform (221). The outer end of the sealing element (22) is provided with an outer positioning platform (222). The first sealing ring (23) is embedded in the end face of the outer positioning platform (222). The first spring (24) is fitted on the sealing element (22). The upper and lower ends of the first spring (24) abut against the inner positioning platform (221) and the sealing cylinder (21) respectively.

8. The coffee machine hydraulic system assembly according to claim 7, characterized in that, The powder pressing element (42) includes a hydraulic seat (421), a water guide cover (422), and a water distribution net (423) arranged axially in sequence. The hydraulic seat (421) is opposite to the piston head (47). The water guide cover (422) is provided with a water channel (4221) connecting the extraction water channel (51) and the extraction container (3). The side of the water guide cover (422) is provided with a powder scraping sealing ring (424). The water channel (4221) is L-shaped and extends from the outside of the water guide cover (422) to the middle of the water guide cover (422), and makes the extraction water channel (51) away from the axis of the main cylinder and offset to the side of the main cylinder. The third sealing ring (44) is provided on the hydraulic seat (421). A sixth sealing ring (425) is provided between the hydraulic seat (421) and the water guide cover (422).

9. The coffee machine hydraulic system assembly according to claim 8, characterized in that, The water circuit drive mechanism (1) includes a first sealed water circuit (11) connected to the sealing component (2), a second tamping water circuit (12) connected to the tamping component (4), and a third coffee water circuit (13) connected to the extraction component (5). The first sealed water circuit (11), the second tamping water circuit (12), and the third coffee water circuit (13) are each equipped with a solenoid valve (14) for controlling the opening and closing of the water circuit. The water circuit drive mechanism (1) also includes a pressure relief water circuit (15), which is connected to the first sealing water circuit (11), the second tamping water circuit (12), and the third coffee water circuit (13) respectively. The head end of the solenoid valve (14) is connected to the pressure relief water circuit (15). The pressure relief water circuit (15) includes a pressure relief box (151) and a water receiving tray (152) connected to the output end of the pressure relief box (151). The input end of the pressure relief box (151) is connected to the first sealing water circuit (11), the second tamping water circuit (12), and the third coffee water circuit (13).

10. The coffee machine hydraulic system assembly according to claim 9, characterized in that, The extraction container (3) has an inlet. The outer diameter of the first sealing ring (23) is larger than the outer diameter of the inlet of the extraction container (3). The inner diameter of the first sealing ring (23) is smaller than the outer diameter of the inlet of the extraction container (3) but larger than the inner diameter of the inlet of the extraction container (3). The inlet has an outwardly extending edge (31). The outer diameter of the edge (31) is the outer diameter of the inlet, and the inner diameter of the edge (31) is the inner diameter of the inlet. After the first sealing stroke is completed, the powder pressing stroke is performed.

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