Extraction device, beverage brewing machine

Abstract

The application discloses an extraction device and a beverage brewing machine. The extraction device comprises an extraction cavity, a liquid inlet, a liquid outlet, and a filter screen arranged at the liquid outlet. The liquid inlet and the liquid outlet are communicated with the extraction cavity, and the liquid inlet and the liquid outlet are arranged at different positions. The beverage brewing machine comprises the above extraction device. The water pressure of the liquid inlet is changed in direction and then acts on the filter screen, so that the water pressure acting on the filter screen is reduced, and the water pressure of the liquid inlet directly acting on the filter screen is avoided, thereby preventing the filter screen from being blocked.

Description

TECHNICAL FIELD

[0001] The present application relates to an extraction device and a beverage brewing machine. BACKGROUND

[0002] At present, the beverage brewing machine such as coffee machine or tea machine extracts the effective components in coffee or tea, and usually uses high-pressure extraction method. The powder cavity is placed up and down, and high-pressure water enters the powder cavity from the upper side or lower side of the powder cavity to extract, and the extraction liquid flows out from the other side (lower side or upper side) of the powder cavity after the extraction is completed. The high-pressure extraction method is convenient to realize fast extraction, but the coffee powder, tea leaves and other powder materials in the extraction cavity will be adsorbed on the filter screen due to the vertical action of high-pressure water, causing the mesh of the filter screen to be blocked, or the powder material directly blocks the liquid outlet, causing the extraction liquid to be unable to normally flow out from the other side. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the defects that the powder material is blocked in the liquid outlet of the beverage brewing machine in the prior art due to high-pressure extraction of the powder material, and the extraction liquid is difficult to flow out from the liquid outlet, and provide an extraction device and a beverage brewing machine.

[0004] The present application solves the above technical problems by the following technical scheme:

[0005] An extraction device, comprising an extraction cavity, a liquid inlet, a liquid outlet, and a filter screen arranged at the liquid outlet, the liquid inlet and the liquid outlet being communicated with the extraction cavity, characterized in that,

[0006] the liquid inlet is arranged at the top surface or bottom surface of the extraction cavity, and the liquid outlet is arranged at the side surface of the extraction cavity;

[0007] or the liquid inlet is arranged at the side surface of the extraction cavity, and the liquid outlet is arranged at the top surface or bottom surface of the extraction cavity.

[0008] In the technical scheme, the powder material to be brewed is placed in the extraction cavity, water enters the extraction cavity from the liquid inlet to extract the components in the powder material, and the extraction liquid is filtered by the filter screen and flows out from the liquid outlet after the extraction is completed. The water pressure of the liquid inlet can be decomposed into horizontal component and vertical component after contacting with the powder material in the extraction cavity. When the liquid inlet is arranged at the top surface or side surface of the extraction cavity, and the liquid outlet is arranged at the side surface of the extraction cavity, only the horizontal component acts on the filter screen; when the liquid inlet is arranged at the side surface of the extraction cavity, and the liquid outlet is arranged at the top surface or bottom surface of the extraction cavity, only the vertical component acts on the filter screen. By arranging the liquid inlet and the liquid outlet at different positions, the water pressure of the liquid inlet acts on the filter screen after changing the direction, that is, the water pressure acting on the filter screen is the component of the water pressure of the liquid inlet, which reduces the water pressure acting on the filter screen, and also avoids that the water pressure of the liquid inlet directly acts on the filter screen to adsorb the powder material on the filter screen, thereby preventing the filter screen from being blocked.

[0009] Preferably, the liquid inlet is arranged on the bottom surface of the extraction cavity, and the liquid outlet is arranged on the side surface of the extraction cavity.

[0010] In the technical solution, the liquid inlet is arranged on the bottom surface of the extraction cavity, and the liquid outlet is arranged on the side surface of the extraction cavity. After the water pressure of the liquid inlet is decomposed into a horizontal component and a vertical component in the extraction cavity and only the horizontal component acts on the filter screen, the water pressure acting on the filter screen is reduced, and the filter screen is prevented from being blocked by the vertical water pressure of the liquid inlet. Meanwhile, the liquid outlet is arranged on the side surface, so that the filter screen on the side surface is prevented from being blocked by the powder under the action of gravity.

[0011] Preferably, the liquid inlet is arranged close to the side surface of the extraction cavity, the liquid outlet is arranged on the side surface of the extraction cavity away from the liquid inlet, and is arranged on the middle-upper part of the side surface of the extraction cavity.

[0012] In the technical solution, the liquid inlet is arranged close to the side surface of the extraction cavity, and the liquid outlet is arranged on the side surface of the extraction cavity away from the liquid inlet. The distance between the liquid inlet and the liquid outlet in the horizontal direction is large, the horizontal path of the water flow in the extraction cavity is long after the water flow enters the liquid inlet, and the components in the powder are fully extracted. The liquid outlet is arranged on the middle-upper part of the side surface of the extraction cavity, that is, the liquid outlet is arranged on the side surface of the extraction cavity, is arranged above the center line of the extraction cavity, and is not arranged close to the top of the extraction cavity. The liquid outlet is arranged above the center line of the extraction cavity, and the liquid inlet is arranged on the bottom surface of the extraction cavity, so that the distance between the liquid inlet and the liquid outlet in the vertical direction is large, the vertical path of the water flow in the extraction cavity is long after the water flow enters the liquid inlet, and the components in the powder are fully extracted. The liquid inlet is arranged on the bottom surface of the extraction cavity and close to the side wall of the extraction cavity, the liquid outlet is arranged on the side surface of the extraction cavity and away from the liquid inlet, and the liquid outlet is arranged on the middle-upper part of the side surface of the extraction cavity, so that the total path of the water flow in the extraction cavity is long, and the extraction is sufficient. The liquid outlet is arranged above the center line of the extraction cavity but not close to the top of the extraction cavity, so that the liquid outlet is kept away from the top of the extraction cavity, the interference of the top of the extraction cavity on the water pressure of the liquid outlet is reduced, and the stability of the water pressure of the liquid outlet is maintained.

[0013] Preferably, the extraction device further comprises an ejection mechanism, the ejection mechanism is arranged below the extraction cavity, the bottom of the ejection mechanism is provided with a second port, and the inside of the ejection mechanism is provided with a second channel, and the liquid inlet and the second port are communicated through the second channel.

[0014] In the technical solution, the ejection mechanism is arranged to eject the powder in the extraction cavity after the extraction is completed, and the ejection mechanism is arranged below the extraction cavity and moves upward to eject the powder in the process of ejecting the powder. The second port and the second channel are arranged on the ejection mechanism, so that the liquid inlet is connected to the second port through the second channel to supply water.

[0015] Preferably, the second channel comprises at least one longitudinal extension and at least one transverse extension, and the liquid inlet is connected to one of the longitudinal extensions.

[0016] In the technical solution, at least one longitudinal extension is arranged in the second channel, and the liquid inlet is connected to one of the longitudinal extensions, so that the water pressure direction is vertical when the water enters the extraction cavity from the liquid inlet. Compared with other water pressure directions, the water pressure direction being vertical can maximize the use of water pressure while minimizing the water pressure acting on the filter screen. At least one transverse extension is arranged in the second channel, so that the water flows through at least one transverse extension before flowing through one longitudinal extension to the liquid inlet. The change in water flow direction has a buffering effect on the water flow, avoiding excessively high water pressure entering from the liquid inlet.

[0017] Preferably, the extraction device further comprises an extraction cylinder and an ejection mechanism, the extraction cylinder is internally provided with a first channel, the ejection mechanism is located in the first channel and cooperates with the first channel, the extraction cavity is formed between the top of the ejection mechanism and the side wall of the first channel, and the first channel has an opening on the side away from the ejection mechanism.

[0018] In the technical solution, the extraction cylinder and the ejection mechanism are arranged in the extraction device, and the first channel is arranged in the extraction cylinder, so that the extraction cavity is formed between the top of the ejection mechanism and the side wall of the first channel. The extraction cavity is surrounded by other structures, which is simple in structure. The position of the ejection mechanism in the first channel can be adjusted, and the volume of the extraction cavity can be changed by adjusting the position of the ejection mechanism in the first channel. The relative positions between the liquid inlet and the extraction cavity, or between the liquid outlet and the extraction cavity, can be adjusted. The first channel has an opening on the side away from the ejection mechanism, so that the powder placed in the extraction cavity can be removed after being moved to the opening when the ejection mechanism moves upward in the first channel.

[0019] Preferably, the liquid inlet is formed between the side wall of the ejection mechanism and the side wall of the first channel.

[0020] In the technical solution, the liquid inlet is formed between the side wall of the ejection mechanism and the side wall of the first channel. The horizontal path from the liquid inlet to the liquid outlet is the longest, and the extraction is sufficient. The liquid inlet is surrounded by other structures, so that the structure of the liquid inlet is simple.

[0021] Preferably, a sealing ring is arranged between the outer side of the ejection mechanism and the inner side of the first channel, and the communication position of the liquid inlet and the ejection mechanism is located above the sealing ring.

[0022] In the technical solution, the sealing ring is arranged to seal the gap between the first channel and the ejection mechanism. The sealing ring is arranged below the communication position of the liquid inlet and the ejection mechanism to ensure the reliability of the sealing.

[0023] Preferably, the extraction device further comprises a sealing device for closing and opening the liquid outlet.

[0024] In the technical solution, the sealing device is arranged to open and close the liquid outlet, and the liquid outlet is closed during extraction and opened after the extraction is completed to facilitate the flow of the extracted liquid from the liquid outlet.

[0025] Preferably, the liquid outlet penetrates through the side wall of the extraction cavity and forms a third channel, the sealing device comprises a sealing member arranged in the third channel and matched with the third channel, and the sealing member opens the liquid outlet when compressed.

[0026] In the technical solution, the sealing member is arranged in the third channel to open and close the liquid outlet, and the sealing member blocks the third channel to close the liquid outlet during extraction and forms a gap between the sealing member and the third channel to open the liquid outlet after the extraction is completed.

[0027] Preferably, the sealing member is compressed to be deformed to open the liquid outlet.

[0028] In the technical solution, the sealing member extends outward to completely block the third channel to close the liquid outlet during extraction, and the sealing member is deformed to contract under the water pressure to form a gap between the sealing member and the third channel to open the liquid outlet after the extraction is completed, and the extracted liquid flows out of the gap.

[0029] Preferably, the sealing member is hollow and contracts in the hollow direction when deformed.

[0030] In the technical solution, the sealing member is hollow and contracts inward under the water pressure.

[0031] Preferably, the sealing member is in a circular arc structure, and the circular arc surface faces the side of the extraction cavity.

[0032] In the technical solution, the sealing member is in a circular arc structure, and the water pressure acting on each part of the circular arc surface is directed toward the center of the circle. The sealing member in the circular arc structure uniformly contracts toward the center of the circle under the water pressure. The third channel is arranged in a circular shape to match the sealing member, and the sealing effect on the liquid outlet is good during extraction. The third channel is circular for easy processing. After the extraction is completed, the circular arc structure has a large surface area and is subjected to a large water pressure, and the contraction deformation effect is good. The circular arc surface is arranged to face the side of the extraction cavity to ensure that the sealing member contracts under the water pressure to form a gap with the third channel to open the liquid outlet after the extraction is completed.

[0033] Preferably, the sealing device further comprises an elastic element, one end of the elastic element is fixed on the extraction device and away from the extraction cavity, and the other end of the elastic element is located in the third channel and connected with the sealing element.

[0034] In the technical solution, the elastic element is arranged in the third channel and connected with the sealing element, and the elastic element plays a role of positioning the sealing element in the third channel. When the sealing element forms a gap with the third channel under the action of water pressure to open the liquid outlet, the action of the water pressure on the sealing element is transmitted to the elastic element, so that the elastic element drives the sealing element to move away from the extraction cavity on one side of the third channel.

[0035] Preferably, the filter screen is arranged at one end of the third channel close to the extraction cavity.

[0036] In the technical solution, the filter screen is arranged at the end of the third channel close to one side of the third channel, and the sealing element is arranged in the third channel. The extraction liquid passes through the filter screen and then flows out of the third channel, so as to avoid that the powder blocks the third channel. On the path of the extraction liquid, the filter screen is located in front of the sealing element, and the extraction liquid passes through the filter screen and then flows to the sealing element, so as to avoid that the powder is adsorbed on the sealing element to affect the opening and closing of the sealing element on the liquid outlet.

[0037] Preferably, the extraction device further comprises a compaction mechanism, and the compaction mechanism is matched with the extraction cavity.

[0038] In the technical solution, the compaction mechanism is used for filling and compacting the powder placed in the extraction cavity, so that the powder uniformly fills the extraction cavity, and the extraction is facilitated.

[0039] Preferably, the extraction device further comprises a heating device, and the heating device is arranged on the side of the extraction cavity.

[0040] In the technical solution, the heating device is arranged on the side of the extraction cavity, and the powder and the structure in the extraction cavity are heated before the high-temperature and high-pressure water enters the extraction cavity, so as to sufficiently extract the components in the powder and reduce the loss of heat and extraction concentration caused by the heating of the water on the extraction cavity and the powder.

[0041] A beverage brewing machine, characterized in that the extraction device in any one of the preceding technical solutions is used.

[0042] The positive progress effect of the present application is that:

[0043] By arranging the liquid inlet and the liquid outlet at different positions, the water pressure of the liquid inlet is changed in direction and then acts on the filter screen, the water pressure acting on the filter screen is reduced, and the water pressure of the liquid inlet directly acting on the filter screen is also avoided, so that the filter screen is prevented from being blocked. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 Structure sectional view of the extraction device according to an embodiment of the present application.

[0045] Figure 2 Structure schematic view of the extraction device according to an embodiment of the present application before adding powder.

[0046] Figure 3 Structure schematic view of the extraction device according to an embodiment of the present application after adding powder.

[0047] Figure 4 Structure schematic view of the extraction device according to an embodiment of the present application. Figure 1 Enlarged view of A in FIG. 1.

[0048] Figure 5 Schematic view of liquid inlet when the extraction device according to an embodiment of the present application is in use. Figure 1 Schematic view of liquid inlet when the extraction device according to an embodiment of the present application is in use.

[0049] Figure 6 Schematic view of liquid outlet when the extraction device according to an embodiment of the present application is in use. Figure 1 Enlarged view of B in FIG. 1.

[0050] Figure 7 Schematic view of liquid outlet when the extraction device according to an embodiment of the present application is in use. Figure 1 Schematic view of liquid outlet when the extraction device according to an embodiment of the present application is in use.

[0051] Explanation of reference signs:

[0052] Extraction device 1;

[0053] Heating device 10, compaction mechanism 20;

[0054] Ejection mechanism 30, second port 31, second channel 32, second longitudinal extension 33, transverse extension 34, first longitudinal extension 35;

[0055] Extraction cylinder 40, first channel 41, first boss 42, second boss 43;

[0056] Sealing ring 50;

[0057] Extraction cavity 60, liquid inlet 61, liquid outlet 62, filter screen 63, powder 64;

[0058] Sealing device 70, third channel 71, sealing member 72, spring 73. DETAILED DESCRIPTION

[0059] The present application will be further described in the following by way of examples, but the present application is not limited in the scope of the described examples.

[0060] Figures 1-7 Structure schematic view of the extraction device 1 according to an embodiment of the present application.

[0061] As Figure 1As shown, the extraction device 1 includes an extraction chamber 60, an inlet 61, an outlet 62, and a filter 63. The inlet 61 and the outlet 62 are connected to the extraction chamber 60, and the filter 63 is located at the outlet 62. The inlet 61 is located on the bottom surface of the extraction chamber 60, and the outlet 62 is located on the side surface of the extraction chamber 60.

[0062] In other embodiments, the inlet 61 can be located on the top surface of the extraction chamber 60 and the outlet 62 can be located on the side surface of the extraction chamber 60; or the inlet 61 can be located on the side surface of the extraction chamber 60 and the outlet 62 can be located on the top surface of the extraction chamber 60; or the inlet 61 can be located on the side surface of the extraction chamber 60 and the outlet 62 can be located on the bottom surface of the extraction chamber 60.

[0063] By setting the inlet 61 and outlet 62 in different positions, the water pressure from the inlet 61 is redirected before acting on the filter screen 63. That is, the water pressure acting on the filter screen 63 is a component of the water pressure from the inlet 61, which reduces the water pressure acting on the filter screen 63 and also prevents the water pressure from the inlet 61 from acting directly on the filter screen 63, thereby preventing the filter screen 63 from becoming clogged.

[0064] like Figure 5 As shown, because the outlet 62 and the inlet 61 are located in different positions, the water enters the extraction chamber 60 through the inlet 61 at a velocity of V1. Within the extraction chamber 60, V1 acts on the powder 64 and decomposes into V3 in the horizontal direction and V2 in the vertical direction. For example... Figure 7 As shown, the horizontal velocity component V3 of water in the extraction chamber 60 is decelerated and then acts on the filter screen 63 at a velocity V4, before flowing out from the outlet 62. The direction of velocity V4 is horizontal. V4 is the velocity of the component V3 of V1 after being decelerated in the extraction chamber 60. The velocity V1 of the high-pressure water at the inlet 61 is deflected and decelerated before acting on the filter screen 63 at a velocity V4, thus avoiding the high-pressure water acting directly on the filter screen 63 and causing the powder 64 to be adsorbed onto the filter screen 63, resulting in clogging of the filter screen 63.

[0065] like Figure 2 As shown, the extraction device 1 also includes an extraction cylinder 40 and an ejector mechanism 30. The extraction cylinder 40 has a first channel 41 with an opening at the top. The ejector mechanism 30 is located at the bottom of the first channel 41 and cooperates with it. The position of the ejector mechanism 30 within the first channel 41 is adjustable. Figure 1 As shown, the extraction device 1 also includes a compaction mechanism 20, which is disposed in and cooperates with the first channel 41. The compaction mechanism 20 is located above the ejection mechanism 30, and the extraction chamber 60 is formed between the bottom surface of the compaction mechanism 20, the top surface of the ejection mechanism 30, and the side wall of the first channel 41.

[0066] The extraction chamber 60 is enclosed by other structures and has a simple structure. The volume of the extraction chamber 60 can be changed by adjusting the position of the ejector mechanism 30 in the first channel 41. The first channel 41 has an opening on the side away from the ejector mechanism 30, and the position of the ejector mechanism 30 in the first channel 41 is adjustable. Before extraction, the ejector mechanism 30 is ensured to be in a suitable position. During the extraction process, the position of the ejector mechanism 30 remains unchanged. After the extraction is completed and the extract is removed, the ejector mechanism 30 moves upward in the first channel 41 to the opening of the first channel 41, ejecting and removing the powder 64.

[0067] like Figure 3 As shown, the compaction mechanism 20 is used to compact the powder 64 placed in the extraction chamber 60, so that the powder 64 fills the extraction chamber 60 evenly, so as to facilitate complete extraction.

[0068] In other embodiments, the extraction device 1 may not include the extraction cylinder 40; the extraction device 1 only needs to include the extraction chamber 60 structure to extract the components from the powder 64. In other embodiments, the extraction chamber 60 may be a solid structure rather than a space enclosed by other structures, such as a barrel-shaped structure with an internal groove or other structural forms. In other embodiments, the extraction device 1 may include, but not all, the extraction cylinder 40, the ejection mechanism 30, and the compaction mechanism 20. In other embodiments, the structural forms and relative positions of the extraction cylinder 40, the ejection mechanism 30, the compaction mechanism 20, and the extraction chamber 60 may differ from those in this embodiment, as long as the extraction chamber 60 in the extraction device 1 can extract the components from the powder 64.

[0069] like Figure 2 As shown, a heating device 10 is also provided on the side of the extraction chamber 60. Before the high-temperature and high-pressure water enters the extraction chamber 60, the heating device 10 heats the extraction chamber 60 and other structures, as well as the powder 64 inside the extraction chamber 60, to fully extract the components in the powder 64 and reduce the heat loss and extraction concentration loss caused by water heating the extraction chamber 60 and other structures and powder 64. If coffee is brewed using the extraction device 1, heating the coffee powder with the heating device 10 before water enters can increase the fat solubility of the coffee during extraction.

[0070] In other embodiments, the heating device 10 may not be provided; or the structure and position of the heating device 10 may be different from those in this embodiment.

[0071] like Figure 1 As shown, the inlet 61 is located close to the side of the extraction chamber 60 and is formed between the side wall of the ejector mechanism 30 and the side of the extraction chamber 60. The outlet 62 is located on the side of the extraction chamber 60 away from the inlet 61, and the outlet 62 is located in the upper middle part of the extraction chamber 60, and is not close to the bottom surface of the compaction mechanism 20.

[0072] The liquid inlet 61 is formed between the side wall of the ejection mechanism 30 and the side wall of the first channel 41, and is farthest from the horizontal path of the liquid outlet 62, so that the extraction is sufficient. The liquid inlet 61 is surrounded by other structures, so that the structure of the liquid inlet 61 is simple.

[0073] The liquid inlet 61 and the liquid outlet 62 are farthest apart in the horizontal direction, so that the horizontal path of water from the liquid inlet 61 to the liquid outlet 62 is the longest, and the powder 64 is fully extracted in the extraction cavity 60. The liquid inlet 61 is arranged at the bottom of the extraction cavity 60, and the liquid outlet 62 is arranged at the middle and upper part of the extraction cavity 60. The liquid inlet 61 and the liquid outlet 62 are far apart in the vertical direction, so that the vertical path of water from the liquid inlet 61 to the liquid outlet 62 is longer, and the powder 64 is fully extracted in the extraction cavity 60. The liquid outlet 62 is located at the middle and upper part of the extraction cavity 60, but is not close to the top of the extraction cavity 60. The liquid outlet 62 is kept away from the top of the extraction cavity 60, so as to reduce the interference of the top of the extraction cavity 60 on the water pressure of the liquid outlet 62, and keep the water pressure of the liquid outlet 62 stable. During the extraction process, the extraction liquid near the compaction mechanism 20 will be affected by the reaction force of the compaction mechanism 20, resulting in unstable water pressure of the extraction liquid near the compaction mechanism 20. The liquid outlet 62 is not close to the bottom surface of the compaction mechanism 20, so as to reduce the interference of the compaction mechanism 20 on the water pressure of the liquid outlet 62, and keep the water pressure of the liquid outlet 62 stable.

[0074] In other embodiments, the structure of the liquid inlet 61, the positions of the liquid inlet 61 and the liquid outlet 62 are different from those of the present embodiment, as long as the liquid inlet 61 and the liquid outlet 62 are arranged at different positions.

[0075] As shown in Figure 4 The bottom of the ejection mechanism 30 is provided with a first port, and the inside of the ejection mechanism 30 is provided with a second channel 32. The second channel 32 includes a second longitudinal extension section 33, a transverse extension section 34, and a first longitudinal extension section 35. The second port 31, the second longitudinal extension section 33, the transverse extension section 34, the first longitudinal extension section 35, and the liquid inlet 61 are sequentially connected and communicated.

[0076] The second port 31 and the second channel 32 are arranged on the ejection mechanism 30, so as to connect the liquid inlet 61 with the second port 31 through the second channel 32 to supply water. The water flows from the second port 31 to the liquid inlet 61, and then sequentially passes through the second longitudinal extension section 33, the transverse extension section 34, and the first longitudinal extension section 35 of the second channel 32. When the water flows from the second longitudinal extension section 33 to the transverse extension section 34, the direction of the water flow changes, resulting in deceleration. When the water flows from the transverse extension section 34 to the first longitudinal extension section 35, the direction of the water flow changes again, resulting in deceleration. After the water flows from the second port 31 to the second channel 32 and then to the liquid inlet 61, the water flow is decelerated by changing the direction of the water flow in the second channel 32, so as to avoid excessive water pressure at the liquid inlet 61.

[0077] The inlet 61 is connected to the first longitudinal extension section 35, ensuring that when water enters the extraction chamber 60 from the inlet 61, the water pressure and velocity direction are vertical. The water pressure at the outlet 62 is horizontal. Compared with other directions, the vertical water pressure at the inlet 61 maximizes the utilization of water pressure while maximizing the change in direction and pressure loss of water during its journey from the inlet 61 to the outlet 62. This ensures that the water pressure acting on the filter screen 63 is low, preventing powder 64 from clogging the filter screen 63.

[0078] In other embodiments, the ejector mechanism 30 may not have a second port 31 and a second channel 32, as long as water can enter the inlet 61. In other embodiments, the position of the second port 31 in the ejector mechanism 30, and the number of lateral extensions 34 and longitudinal extensions in the second channel 32 may differ from this embodiment, as long as the second port 31 and the inlet 61 can be connected through the second channel 32, and the water flow can be slowed down in the second channel 32 before entering the inlet 61.

[0079] like Figure 4 As shown, a sealing ring 50 is provided between the outer side of the ejection mechanism 30 and the inner side of the first channel 41. The sealing ring 50 is located below the transverse extension 34 and the first longitudinal extension 35 of the second channel 32, ensuring that the sealing ring 50 can prevent water from leaking out from the gap between the ejection mechanism 30 and the first channel 41.

[0080] like Figure 6 As shown, the outlet 62 penetrates the side wall of the extraction cylinder 40 and correspondingly penetrates the side wall of the extraction chamber 60, forming a third channel 71 on the side wall of the extraction cylinder 40. The extraction cylinder 40 is provided with a first boss 42 and a second boss 43 coaxial with the third channel 71, and the third channel 71 penetrates the second boss 43. The extraction device 1 also includes a hollow arc-shaped sealing element 72 and a spring 73. The sealing element 72 and the spring 73 constitute the sealing device 70, and the spring 73 is the aforementioned elastic element. One end of the spring 73 abuts against the first boss 42, and the other end is connected to the sealing element 72, which abuts against the filter screen 63. The sealing element 72 is deformable under pressure, and during deformation, it contracts towards the hollow direction, with the arc surface facing the extraction chamber 60.

[0081] A seal 72 is disposed within the third channel 71. The outlet 62 is opened and closed via the seal 72. During extraction, the seal 72 blocks the third channel 71 to close the outlet 62. Figure 7 As shown, after extraction is completed, the sealing element 72 is compressed and deformed in the hollow direction under the action of water pressure, that is, it shrinks inward and forms a gap with the third channel 71, opening the liquid outlet 62, and the extract flows out from the gap between the sealing element 72 and the third channel 71; the water pressure is transmitted to the spring 73 through the sealing element 72, the spring 73 is deformed by the pressure, and drives the sealing element 72 to move towards the first protrusion 42.

[0082] In other embodiments, the sealing device 70 can not be provided. In other embodiments, the sealing device 70 can be different from the present embodiment, as long as the sealing device 70 can open and close the liquid outlet 62, close the liquid outlet 62 during extraction, and open the liquid outlet 62 after the extraction is completed to facilitate the flow of the extraction liquid from the liquid outlet 62.

[0083] In other embodiments, the sealing device 70 can be different in structure from the present embodiment, and the sealing member 72 can not be deformed under pressure. For example, the third passage 71 can have a horn-shaped structure, with a small size near the extraction cavity 60 and a large size away from the extraction cavity 60. The sealing member 72 can move away from the extraction cavity 60 under the action of water pressure and form a gap with the third passage 71 to open the liquid outlet 62.

[0084] In other embodiments, the sealing member 72 can not be hollow, but can have a conical or frustoconical structure, with the bottom surface away from the extraction cavity 60. The sealing member 72 can also have other structures and can form a gap with the third passage 71 to open the liquid outlet 62 under the action of water pressure.

[0085] The first boss 42 on the extraction cylinder 40 facilitates the positioning of the elastic element, and the second boss 43 lengthens the length of the third passage 71 through the extraction cylinder 40, facilitating the installation of the sealing member 72 and the spring 73 and providing movement space for the sealing member 72 and the spring 73.

[0086] In other embodiments, the sealing device 70 can not include an elastic element, and accordingly, the first boss 42 need not be provided, but only the sealing member 72 is needed to open and close the liquid outlet 62.

[0087] The filter screen 63 is provided at the end of the third passage 71 near the third passage 71, and the extraction liquid passes through the filter screen 63 before entering the third passage 71 and flowing out, thereby preventing the powder 64 from blocking the third passage 71. By applying the extraction device 1 of any of the foregoing embodiments to a beverage brewing machine, the powder 64 can be prevented from blocking the filter screen 63 during the preparation of a beverage, thereby preventing poor liquid flow. The application of the extraction device 1 to a beverage brewing machine is mature in the prior art, and can be implemented by referring to the prior art.

[0088] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and such changes and modifications fall within the protection scope of the present application.

Claims

1. An extraction device comprising an extraction cavity, an inlet, an outlet, a filter screen arranged at the outlet, the inlet and the outlet communicating with the extraction cavity, characterized in that, the inlet is arranged at the top surface or the bottom surface of the extraction cavity, and the outlet is arranged at the side surface of the extraction cavity; or the inlet is arranged at the side surface of the extraction cavity, and the outlet is arranged at the top surface or the bottom surface of the extraction cavity; the extraction device further comprises an extraction cylinder and an ejection mechanism, the extraction cylinder is internally provided with a first channel, the ejection mechanism is located in and cooperates with the first channel, the extraction cavity is formed between the side wall of the first channel and the top of the ejection mechanism, and the first channel has an opening at the side away from the ejection mechanism.

2. The extraction device of claim 1, wherein The inlet is arranged at the bottom surface of the extraction cavity, and the outlet is arranged at the side surface of the extraction cavity.

3. The extraction device of claim 2, wherein, The inlet is close to the side wall of the extraction cavity, the outlet is arranged at the side of the extraction cavity away from the inlet, and is located at the middle and upper part of the side surface of the extraction cavity.

4. The extraction device of claim 2, wherein, The ejection mechanism is located below the extraction cavity, the bottom of the ejection mechanism is provided with a second port, and the interior is provided with a second channel, the inlet communicates with the second port through the second channel.

5. The extraction device of claim 4, wherein The second channel comprises at least one longitudinal extension and at least one transverse extension, and the inlet is connected to one of the longitudinal extensions.

6. The extraction device of claim 1, wherein, The inlet is formed between the side wall of the ejection mechanism and the side wall of the first channel.

7. The extraction device of claim 6, wherein A sealing ring is arranged between the outer side of the ejection mechanism and the inner side of the first channel, and the communication between the inlet and the ejection mechanism is located above the sealing ring.

8. The extraction device of claim 1, wherein, The extraction device further comprises a sealing device for closing and opening the outlet.

9. The extraction device of claim 8, wherein, The outlet penetrates through the side wall of the extraction cavity and forms a third channel, the sealing device comprises a sealing member arranged in and cooperating with the third channel, and the sealing member opens the outlet when pressed.

10. The extraction device of claim 9, wherein, The sealing member is contractible and deformable under pressure to open the outlet.

11. The extraction device of claim 10, wherein, The sealing member is a hollow structure and contracts in the hollow direction when deformed.

12. The extraction device of claim 11, wherein, The sealing member is a circular arc structure, and the circular arc surface faces the side of the extraction cavity.

13. The extraction device of claim 9, wherein, The sealing device further comprises an elastic element, one end of the elastic element is fixed on the extraction device and away from the extraction cavity, and the other end of the elastic element is located in the third channel and connected with the sealing member.

14. The extraction device of claim 9, wherein, The filter screen is arranged at one end of the third channel close to the extraction cavity.

15. The extraction device of claim 1, wherein, The extraction device further comprises a compaction mechanism cooperating with the extraction cavity.

16. The extraction device of claim 1, wherein The extraction device further comprises a heating device arranged at the side surface of the extraction cavity.

17. A beverage brewing machine, characterized by It comprises the extraction device according to any one of claims 1-16.

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