Pressure-regulated water outlet structure and pressure extraction device

Abstract

The utility model relates to the field of pressure extraction, especially a structure and pressure extraction device based on pressure regulation outlet water, the structure based on pressure regulation outlet water includes water sump and sleeve, the upper portion of water sump is equipped with gas source interface, and the lower part of water sump is connected with sleeve, and the pressure plate is established between water sump and sleeve, and the pressure plate is used for isolating the space that water sump and sleeve are composed, and the space that the pressure plate and sleeve constitute one side is equipped with sealing assembly and elastic part, and the through hole is equipped on the pressure plate, and the elastic part is connected with sealing assembly and promotes sealing assembly to seal through -hole. Through the control gas source input, can make the pressure in the liquid storage space reach rated pressure value, and sealing assembly and through -hole are separated under the action of pressure and produce the gap, and the liquid on the upper portion of pressure plate flows steadily under rated pressure value from the gap that sealing assembly and through -hole separate and produce, and further meet the strict requirement to outlet water pressure under certain use scene.

Description

Technical Field

[0001] This utility model relates to the field of pressure extraction, and in particular to a structure and pressure extraction device based on pressure-regulated water output. Background Technology

[0002] In existing espresso extraction techniques, precise control of extraction pressure plays a crucial role in coffee quality. The conventional extraction standard is pre-infusion at 3-4 Bar pressure. Before reaching 3 Bar, water cannot enter the portafilter uncontrollably to ensure sufficient and even pre-infusion of water and coffee grounds, thus contributing to improved taste and flavor. However, existing extraction devices struggle to effectively control pre-infusion at the appropriate pressure, resulting in poor pre-infusion and impacting the final coffee quality. Utility Model Content

[0003] The purpose of this invention is to provide a structure and pressure extraction device based on pressure-regulated water output, which can meet the strict requirements for water pressure during coffee extraction.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model provides a structure for water outlet based on pressure regulation, including a water tank and a sleeve. The upper part of the water tank is provided with an air source interface, and the lower part of the water tank is connected to the sleeve. A pressure plate is provided between the water tank and the sleeve. The pressure plate is used to isolate the space formed by the water tank and the sleeve. A sealing component and an elastic element are provided in one side space formed by the pressure plate and the sleeve. A through hole is provided on the pressure plate. The elastic element is connected to the sealing component and pushes the sealing component to seal the through hole.

[0006] Preferably, a filter element is also provided in the space formed by the pressure plate and the sleeve, and the sealing component and the elastic element are both arranged between the pressure plate and the filter element, with the two ends of the elastic element connected to the sealing component and the filter element respectively.

[0007] Preferably, the filter element has a blind hole on the side facing the pressure plate, the elastic element is disposed at the bottom of the blind hole, and the sealing assembly is slidably inserted into the blind hole.

[0008] Preferably, it also includes a receiving element disposed below the filter element and used to support the filter element.

[0009] Preferably, the sealing assembly includes a support member and a first sealing ring. The first sealing ring is fitted onto the upper part of the support member, and the lower part of the support member is connected to the elastic member. The support member seals the through hole of the pressure plate through the first sealing ring.

[0010] Preferably, it further includes a second sealing ring, which is sleeved on the pressure plate, and the outer periphery of the pressure plate is sealed to the inner peripheral wall of the water tank and / or the sleeve through the second sealing ring.

[0011] Preferably, the lower part of the water tank is provided with an external thread, and the end of the sleeve that is connected to the water tank is provided with a corresponding internal thread, and the water tank and the sleeve are connected by a threaded seal.

[0012] This utility model also provides a pressure extraction device, including the structure for regulating water output based on pressure as described above, and a powder bowl connected to the lower port of the sleeve.

[0013] Preferably, a filter screen is provided between the sleeve and the powder bowl.

[0014] Compared with the prior art, this utility model has significant progress:

[0015] This invention relates to a pressure-regulated water outlet structure. A pressure-bearing plate isolates the space between the water tank and the sleeve. An elastic element connects to and pushes a sealing assembly to tightly fit against a through hole on the pressure-bearing plate. The elastic force of the elastic element creates a tight seal between the sealing assembly and the through hole, preventing liquid from flowing out. When there is no external air supply or the pressure in the storage space does not reach the rated value, the elastic force of the elastic element is sufficient to maintain the seal of the sealing assembly against the through hole, ensuring that liquid does not flow out uncontrollably and maintaining the airtightness of the storage space. When an external air source inputs gas into the storage space through the air source interface at the top of the water tank, the pressure in the storage space gradually increases. As the pressure increases, the gas pressure acts on the sealing assembly, counteracting the elastic force of the elastic element. When the gas pressure in the storage space reaches the set rated pressure value, the gas pressure overcomes the pushing force of the elastic element on the sealing assembly, causing the sealing assembly to separate from the through hole, forming a gap through which liquid can flow out from the storage space. By controlling the air source input, the pressure in the liquid storage space can be stabilized at the rated value, enabling the liquid to flow out stably under the rated pressure, thereby meeting the strict requirements for water outlet pressure in certain usage scenarios. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a schematic diagram of the overall structure of the pressure-regulated water outlet structure according to an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A top view of the structure for regulating water output based on pressure.

[0019] Figure 3 yes Figure 2 Schematic sectional view along the middle AA direction;

[0020] Figure 4 yes Figure 1 An explosive schematic diagram of a pressure-regulated water outlet structure.

[0021] Explanation of reference numerals in the attached drawings: 1. Water tank; 11. Gas source interface; A. Liquid storage space; 2. Sleeve; 3. Pressure plate; 31. Through hole; 4. Sealing assembly; 41. Support; 42. First sealing ring; 5. Elastic element; 6. Filter element; 61. Blind hole; 7. Receiving element; 8. Second sealing ring; 9. Filter screen. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0023] like Figures 1 to 4 The image shows an embodiment of the pressure-regulated water outlet structure provided by this utility model.

[0024] See Figure 3 and Figure 4The pressure-regulated water outlet structure of this embodiment includes a water tank 1 and a sleeve 2. The upper part of the water tank 1 is provided with an air source interface 11, and the lower part of the water tank 1 is connected to the sleeve 2. A pressure-bearing plate 3 is provided between the water tank 1 and the sleeve 2, and the pressure-bearing plate 3 is used to isolate the space formed by the water tank 1 and the sleeve 2. The space formed by the water tank 1 and the pressure-bearing plate 3 is a liquid storage space A, which is used to hold liquid. The air source interface 11 at the upper part of the water tank 1 is used to connect to an external air source. The external air source can supply gas into the liquid storage space A through the air source interface 11, thereby increasing the pressure value in the liquid storage space A. The pressure-bearing plate 3 has sufficient structural strength to withstand the weight of the liquid in the liquid storage space A, and when gas is introduced into the liquid storage space A, the pressure-bearing plate 3 will not deform under the gradually increasing gas pressure. The pressure-bearing plate 3 is preferably made of metal. A sealing assembly 4 and an elastic element 5 are provided in the space formed by the pressure plate 3 and the sleeve 2. The pressure plate 3 has a through hole 31. The elastic element 5 is connected to the sealing assembly 4 and pushes the sealing assembly 4 to seal the through hole 31. The elastic element 5 deforms under force and generates a certain elastic force. When no gas is input into the liquid storage space A, or when the pressure of the gas supplied to the liquid storage space A does not reach the pressure rating, the elastic element 5 has sufficient elastic force to push the sealing assembly 4 to seal the through hole 31, so that the liquid in the liquid storage space A cannot flow out through the through hole 31, that is, the liquid in the liquid storage space A cannot flow out uncontrollably through the through hole 31 of the pressure plate 3.

[0025] In use, after the gas source interface 11 is connected to an external gas source, gas continuously enters the liquid storage space A, causing the pressure in the liquid storage space A to gradually increase. The gas pressure in the liquid storage space A acts directly on the sealing component 4 through the through hole 31 of the pressure plate 3, and the force applied to the sealing component 4 causes the sealing component 4 to tend to separate from the through hole 31. When the gas pressure in the liquid storage space A gradually increases to reach the rated pressure value, the pressure in the liquid storage space A overcomes the thrust of the elastic element 5 on the sealing component 4, causing the sealing component 4 to separate from the through hole 31 of the pressure plate 3, creating a gap between the sealing component 4 and the through hole 31. The liquid in the liquid storage space A flows out from the gap created between the sealing component 4 and the through hole 31. Therefore, the pressure-regulated water outlet structure of this embodiment can precisely control the timing of water outlet by controlling pressure changes, thereby achieving the purpose of water outlet at the required rated pressure value.

[0026] See Figure 3 and Figure 4Preferably, a filter element 6 is also provided in the space formed by the pressure plate 3 and the sleeve 2. The sealing assembly 4 and the elastic element 5 are both arranged between the pressure plate 3 and the filter element 6, and the two ends of the elastic element 5 are connected to the sealing assembly 4 and the filter element 6 respectively. On the one hand, by setting the filter element 6 to support the sealing assembly 4 and the elastic element 5, the structural layout of each component is compact and reasonable, which improves the stability of the entire water outlet structure. Thus, when the pressure in the liquid storage space A changes, each component of the water outlet structure can work together precisely according to the design requirements, ensuring the reliability of the water outlet process. On the other hand, the filter element 6 has multiple through-holes. The liquid flowing out of the liquid storage space A flows to the filter element 6 and then flows out more evenly through the filter holes on the filter element 6, thereby ensuring the stability and consistency of the water outlet.

[0027] See Figure 3 and Figure 4 Preferably, the filter element 6 has a blind hole 61 on the side facing the pressure plate 3, the elastic element 5 is disposed at the bottom of the blind hole 61, and the sealing assembly 4 is slidably inserted through the blind hole 61. The blind hole 61 provides a relatively closed and stable environment for the elastic element 5, effectively preventing impurities from entering and interfering with the elastic element 5. At the same time, the bottom support of the blind hole 61 also provides a stable reaction force point for the elastic element 5, enabling the elastic element 5 to more stably perform its elastic support function. The blind hole 61 also plays a good guiding role in the sliding of the sealing assembly 4, ensuring that the sealing assembly 4 always maintains coaxiality with the through hole 31 during movement, thereby improving sealing performance and reliability. When the pressure changes, the sealing assembly 4 can move up and down accurately along the blind hole 61, avoiding poor sealing or jamming caused by offset or skew.

[0028] See Figure 3 and Figure 4 Preferably, the system further includes a receiving component 7, which is disposed below the filter element 6 and serves to support the filter element 6. The receiving component 7 provides a stable support for the filter element 6, allowing the stable filter element 6 to better support the sealing assembly 4 and the elastic element 5, ensuring they maintain the correct position and orientation during operation and improving the reliability of the effluent structure. Furthermore, the receiving component 7 facilitates the installation of the filter element 6, enabling quick positioning and fixation, thus improving assembly efficiency.

[0029] See Figure 3 and Figure 4Preferably, the sealing assembly 4 includes a support member 41 and a first sealing ring 42. The first sealing ring 42 is fitted onto the upper part of the support member 41, and the lower part of the support member 41 is connected to the elastic member 5. The support member 41 seals the through hole 31 of the pressure plate 3 through the first sealing ring 42. The support member 41 provides the main structural support for the sealing assembly 4, and the support member 41 can maintain the stability of its shape and position under pressure. The lower part of the support member 41 is connected to the elastic member 5, so that the elastic member 5 can effectively transmit elastic force, thereby pushing the sealing assembly 4 to perform sealing or separation actions. The first sealing ring 42 is fitted onto the support member 41, and the upper end of the support member 41 extends into the through hole 31. The first sealing ring 42 is below the pressure plate 3 and forms a sealing contact with the pressure plate on the periphery side of the through hole 31 through an interference fit. The first sealing ring 42 can effectively prevent liquid leakage from the through hole 31, ensuring the controllability of the water discharge process. Specifically, in this embodiment, both the first sealing ring 42 and the elastic element 5 are rubber O-rings. This material has good elasticity and sealing performance, and can adapt to pressure changes and maintain a stable sealing effect. The support member 41 is composed of two columns with different diameters. The column with the smaller diameter passes through the through hole 31, and the column with the larger diameter slides through the blind hole 61. The elastic element 5 is set at the bottom of the blind hole 61 to provide elastic support for the support member 41. The first sealing ring 42 is fitted onto the column with the smaller diameter. Under the elastic force of the elastic element 5, the stepped surface where the two columns of the support member 41 intersect and the lower surface of the pressure plate 3 compress the first sealing ring 42, causing the first sealing ring 42 to deform. This achieves sealing of the through hole 31 on the pressure plate 3 through the support member 41, the first sealing ring 42, and the elastic element 5. When the pressure in the liquid storage space A reaches the rated pressure value, the pressure borne by the support member 41 overcomes the thrust of the elastic member 5. Therefore, the support member 41 moves downward and squeezes the elastic member 5. The support member 41 drives the first sealing ring 42 to move downward together, and the downward distance of the first sealing ring 42 is greater than the deformation caused by the compression between the first sealing ring 42 and the lower surface of the pressure plate 3. That is, after the support member 41 moves downward, the first sealing ring 42 separates from the lower surface of the pressure plate 3, and a gap is created between the first sealing ring 42 and the pressure plate 3. Thus, the liquid in the liquid storage space A flows out through this gap. Furthermore, for different rated pressure values, rubber O-rings of different specifications or materials can be selected, so that the deformation and elasticity of the first sealing ring 42 and the elastic member 5 can meet the above-mentioned usage requirements under different rated pressure values.

[0030] See Figure 3 and Figure 4Preferably, it also includes a second sealing ring 8, which is sleeved on the pressure plate 3. The outer periphery of the pressure plate 3 is sealed to the inner peripheral wall of the water tank 1 through the second sealing ring 8, or the outer periphery of the pressure plate 3 is sealed to the inner peripheral wall of the sleeve 2 through the second sealing ring 8, or the outer periphery of the pressure plate 3 is sealed to the inner peripheral walls of both the water tank 1 and the sleeve 2 through the second sealing ring 8. By setting the second sealing ring 8, it is possible to effectively prevent liquid in the storage space A from leaking from the gap between the pressure plate 3 and the water tank 1 or the sleeve 2, ensuring that the liquid can only flow out through the through hole 31 and the filter element 6, thus ensuring the uniqueness and controllability of the water outlet path, enhancing the sealing performance of the entire water outlet structure, and making the water outlet process more stable and reliable. The outer surface of the second sealing ring 8 that contacts the water tank 1 or the sleeve 2 is also provided with an annular protrusion. When the second sealing ring 8 abuts against the inner wall of the water tank 1 or the sleeve 2, the annular protrusion is squeezed. By squeezing the annular protrusion, the local pressure on the contact surface can be increased, making the second sealing ring 8 fit more tightly against the contact surface, thereby effectively preventing liquid leakage. In this embodiment, furthermore, the edges of the pressure plate 3 and the receiving part 7 are both engaged in the second sealing ring 8, further preventing liquid leakage from the edge gaps of the pressure plate 3 or the receiving part 7, thus enhancing the sealing effect and reliability.

[0031] See Figure 3 and Figure 4 Preferably, the lower part of the water tank 1 is provided with an external thread, and the end of the sleeve 2 that connects to the water tank 1 is provided with a corresponding internal thread, so that the water tank 1 and the sleeve 2 are connected by a threaded seal. The threaded connection itself has good sealing performance. Through the tight fit of the threads, it can effectively prevent liquid from leaking from the connection between the water tank 1 and the sleeve 2, ensuring that the liquid in the liquid storage space A can only flow out through the designed path, thereby enhancing the sealing performance of the entire water outlet structure.

[0032] Based on the pressure-regulated water output structure of this utility model, this embodiment also provides a pressure extraction device. This pressure extraction device includes the pressure-regulated water output structure described above, and also includes a powder bowl connected to the lower port of the sleeve 2. The powder bowl is used to hold the raw materials for pressure extraction. The liquid used for extraction flows from the storage space A to the powder bowl under pressure. The extraction liquid passes through the powder bowl and flows out, completing the extraction.

[0033] Preferably, a filter screen 9 is provided between the sleeve 2 and the powder bowl. The filter screen 9 allows the liquid flowing from the liquid storage space A to flow more evenly into the powder bowl. Furthermore, the filter screen 9 is located below the filter element 6. The liquid first passes through the filter element 6 and then through the filter screen 9 before flowing into the powder bowl. The diameter of the filter holes on the filter screen 9 is smaller than the diameter of the filter holes on the filter element 6, and the filter holes on the filter screen 9 are also more densely arranged than those on the filter element 6. This allows the liquid flowing from the filter element 6 to flow more evenly into the powder bowl after passing through the filter screen 9.

[0034] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A structure for regulating water output based on pressure, characterized in that, The device includes a water tank (1) and a sleeve (2). The upper part of the water tank (1) is provided with an air source interface (11). The lower part of the water tank (1) is connected to the sleeve (2). A pressure plate (3) is provided between the water tank (1) and the sleeve (2). The pressure plate (3) is used to isolate the space formed by the water tank (1) and the sleeve (2). A sealing component (4) and an elastic element (5) are provided in the space formed by the pressure plate (3) and the sleeve (2). A through hole (31) is provided on the pressure plate (3). The elastic element (5) is connected to the sealing component (4) and pushes the sealing component (4) to seal the through hole (31).

2. The structure for regulating water output based on pressure according to claim 1, characterized in that, A filter element (6) is also provided in the space formed by the pressure plate (3) and the sleeve (2). The sealing component (4) and the elastic element (5) are both arranged between the pressure plate (3) and the filter element (6). The two ends of the elastic element (5) are respectively connected to the sealing component (4) and the filter element (6).

3. The structure for regulating water output based on pressure according to claim 2, characterized in that, The filter element (6) has a blind hole (61) on the side facing the pressure plate (3), the elastic element (5) is disposed at the bottom of the blind hole (61), and the sealing assembly (4) is slidably inserted into the blind hole (61).

4. The structure for regulating water output based on pressure according to claim 2, characterized in that, It also includes a receiving element (7), which is disposed below the filter element (6) and is used to support the filter element (6).

5. The structure for regulating water output based on pressure according to claim 1, characterized in that, The sealing assembly (4) includes a support member (41) and a first sealing ring (42). The first sealing ring (42) is sleeved on the upper part of the support member (41), and the lower part of the support member (41) is connected to the elastic member (5). The support member (41) seals the through hole (31) of the pressure plate (3) through the first sealing ring (42).

6. The structure for regulating water output based on pressure according to claim 1, characterized in that, It also includes a second sealing ring (8), which is sleeved on the pressure plate (3). The outer periphery of the pressure plate (3) is sealed to the inner peripheral wall of the water tank (1) and / or the sleeve (2) through the second sealing ring (8).

7. The structure for regulating water output based on pressure according to claim 1, characterized in that, The lower part of the water tank (1) is provided with an external thread, and the end of the sleeve (2) connected to the water tank (1) is provided with a corresponding internal thread. The water tank (1) and the sleeve (2) are connected by a threaded seal.

8. A pressure extraction apparatus, characterized in that, The structure includes the pressure-regulated water outlet structure as described in any one of claims 1-7, and also includes a powder bowl connected to the lower port of the sleeve (2).

9. The pressure extraction apparatus according to claim 8, characterized in that, A filter screen (9) is provided between the sleeve (2) and the powder bowl.

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