Piston disc, piston assembly, brewing device and beverage processing equipment

Abstract

The utility model discloses a piston disc, a piston assembly, a brewing device and beverage processing equipment. The piston disc comprises a filtering structure and a supporting structure, the filtering structure comprises a filtering part and a first connecting part, and the first connecting part is arranged on the peripheral side of the filtering part; the supporting structure comprises a flow guide part and a second connecting part arranged on the peripheral side of the flow guide part in a surrounding mode. The filtering structure and the supporting structure are integrally formed, so that the first connecting part is connected with the second connecting part, the filtering part is communicated with the flow guide part, and liquid can flow in from one of the filtering part and the flow guide part and flow out from the other one of the filtering part and the flow guide part. According to the piston disc, the filtering structure and the supporting structure are integrally formed, so that the first connecting part and the second connecting part are connected through an integral forming process, and the first connecting part and the second connecting part are connected more reliably and are not prone to loosening and falling off, so that the working stability of the piston disc is guaranteed, and the service life of the piston disc is prolonged. Therefore, the beverage processing equipment works more stably, and the quality of the beverage can be better ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of beverage preparation equipment, and in particular to a piston disc, a piston assembly, a brewer and beverage preparation equipment. Background Art

[0002] Existing beverage preparation equipment, such as coffee machines, typically integrates coffee bean grinding, coffee grounds transfer, extraction, and brewing functions. Specifically, the coffee machine is equipped with a brewer, comprising a brewing cylinder and a piston assembly. The piston assembly reciprocates within the brewing cylinder. The brewing cylinder receives ground coffee at a powder receiving position and injects hot water at the brewing position. The brewing cylinder and piston assembly pressurize the coffee grounds and extract them at high temperature.

[0003] A piston disc is located at the end of the piston assembly, filtering the extracted coffee to prevent impurities from escaping into the finished product. Because the piston assembly moves repeatedly within the brewing cylinder, the filter on the conventional piston disc is typically secured with a snap-on mechanism. This can easily become loose or even fall off after a period of use, affecting the quality of the finished coffee. Utility Model Content

[0004] In view of this, the present invention aims to solve the problem that the filter screen on the traditional piston disc has the risk of loosening and falling, resulting in poor working stability of the piston assembly and affecting the quality of the finished coffee.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a piston disc, comprising:

[0006] The filter structure includes a filter portion and a first connecting portion, wherein the first connecting portion is provided on the outer peripheral side of the filter portion;

[0007] The supporting structure includes a guide portion and a second connecting portion arranged around the outer periphery of the guide portion;

[0008] The filtering structure and the supporting structure are integrally formed so that the first connecting portion and the second connecting portion are connected, and the filtering portion and the guide portion are in communication, and liquid can flow into one of the filtering portion and the guide portion and flow out of the other.

[0009] Optionally, the filtering structure includes:

[0010] A filter screen, wherein the filter portion is formed in the middle of the filter screen;

[0011] A filter frame is arranged around the outer peripheral side of the filter net and is clamped with the support structure. The edge portion of the filter net and the filter frame form the first connecting portion. The filter frame presses the edge portion of the filter net between the filter frame and the support structure. The filter net, the filter frame and the support structure are integrally formed.

[0012] Optionally, a plurality of filter holes are formed on the filter net, and the support structure includes:

[0013] A support plate, wherein at least one communication channel is provided on a side of the support plate facing the filter portion;

[0014] A support column is provided on the other side of the support plate, and a through hole is provided on the support column, and the through hole is set to pass through the support plate, and the through hole and at least one connecting channel jointly form the guide portion, and at least one connecting channel connects the through hole and multiple filter holes.

[0015] Optionally, the filter screen includes a screen body and a flange extending from an edge of the screen body along a lateral direction thereof, wherein the flange overlaps an outer peripheral side of the support plate;

[0016] The filter frame has a first pressing surface pressed onto the side of the net body facing away from the support plate, and a first hook extending from the first pressing surface along its side. A protrusion is provided on the outer peripheral side of the support plate, and the first hook is engaged with the protrusion and pressed onto the outer peripheral side of the flange.

[0017] Optionally, the support plate is arranged in a concave shape on one side facing the support column to form a groove, and the filter cover is arranged at the notch of the groove;

[0018] A plurality of limiting ribs are protruding from the bottom of the groove, and the plurality of limiting ribs are enclosed to form at least one communicating channel.

[0019] Optionally, the plurality of limiting ribs are annularly arranged around the outer circumference of the through hole, and the plurality of limiting ribs on the same circumferential surface form a limiting rib group, and the plurality of limiting rib groups are sequentially arranged inside and outside.

[0020] Optionally, a plurality of guide grooves are further provided at the bottom of the groove, and the plurality of guide grooves are all arranged along the radial direction of the through hole and extend from the through hole toward the edge of the support plate. Each of the guide grooves is arranged between multiple groups of the limiting rib groups and is connected to each group of the limiting rib groups.

[0021] Optionally, a plurality of the filter holes are provided corresponding to the spacing area between each two adjacent groups of the limiting rib groups.

[0022] The utility model also provides a piston assembly, comprising:

[0023] The piston rod has a flow guide channel arranged along its length;

[0024] The above-mentioned piston disc is arranged at one end of the piston rod along its length direction, and the guide portion of the piston disc is connected to the guide channel.

[0025] Optionally, the piston rod member includes a hollow piston main rod and a conduit sleeved on the inner side of the piston main rod, the inner side of the conduit forms the diversion channel, and the conduit is communicated with the diversion part.

[0026] Optionally, the support structure includes a support plate and a support column, and the support column is provided with a through hole;

[0027] At least a portion of the support column extends into the piston main rod, and the through hole is sleeved on the outer peripheral side of the conduit.

[0028] Optionally, a first sealing member is provided between the outer peripheral side of the conduit and the inner peripheral side of the through hole.

[0029] Optionally, an extension portion is provided at one end of the piston main rod connected to the piston disc, and the extension portion extends radially outward from the piston main rod. A clamping portion is provided on the support disc, and the clamping portion is clamped to the end of the extension portion.

[0030] Optionally, an annular boss is protruding from the side of the support plate facing away from the filter portion, and the annular boss is arranged around the outer circumference of the support column. The clamping portion includes a clamping protrusion protruding from the inner ring side of the annular boss, and the extension portion is located in the gap between the annular boss and the support column and is clamped with the clamping protrusion.

[0031] Optionally, a first stopper is provided on the inner side of the piston main rod, the end of the support column extending into the piston main rod abuts against the first stopper, a second stopper is provided on the inner side of the through hole, and the first sealing member is located between the first stopper and the second stopper;

[0032] The piston assembly further includes a locking member sleeved on the outer side of the piston main rod, wherein the locking member has a locked state in which it is locked on the piston rod and an unlocked state in which it is unlocked from the piston rod;

[0033] When in the locked state, the first resisting portion can pressurize the first sealing member, driving the first sealing member to deform and pressurize the second resisting portion, so that the clamping portion connected to the second resisting portion moves in the direction of clamping with the extension portion.

[0034] Optionally, the piston assembly further comprises a locking member and a second sealing member sleeved on the outer ring side of the annular boss, wherein the locking member has a locked state in which it is locked on the piston rod member and an unlocked state in which it is unlocked from the piston rod member;

[0035] When the locking member is in the locking state, the locking member can press the second sealing member to drive the second sealing member to deform and squeeze the clamping portion to move in a direction of clamping with the extension portion.

[0036] Optionally, the piston main rod is provided with an external thread at one end close to the extension portion, and the locking member is sleeved on the outer peripheral side of the piston main rod and is provided with an internal thread engaged with the external thread;

[0037] When the locking member is engaged and locked with the piston main rod, the locking member is pressed onto the second sealing member.

[0038] Optionally, the filter structure includes a filter screen and a filter frame, the filter frame is clamped on the outer peripheral side of the support structure, and the edge portion of the filter screen is pressed between the filter frame and the support structure, the filter frame and the support structure are formed with a receiving groove on the side facing away from the filter part, and the locking member can press at least part of the second seal into the receiving groove.

[0039] The utility model also provides a brewing device, comprising:

[0040] The brewing cylinder is hollow with both ends open;

[0041] The two piston assemblies are respectively located at the open ends of the brewing cylinder.

[0042] The utility model also provides a beverage preparation device, comprising the above-mentioned brewing device.

[0043] The technical solution provided by the utility model has the following beneficial effects:

[0044] The piston disc provided by the present invention includes a filtering structure and a supporting structure. The filtering structure includes a filtering part and a first connecting part. The filtering part can be used to filter liquid (such as coffee liquid). The supporting structure includes a guide part and a second connecting part. The guide part is connected to the filtering part. The guide part can guide the filtered liquid to other positions (such as the finished product discharge channel), or the liquid can be guided to the filtering part through the guide part; and the filtering structure and the supporting structure are integrally formed, so that the first connecting part and the second connecting part are connected, and are manufactured through an integral molding process, so that the first connecting part and the second connecting part are more reliably connected and not easy to loosen and fall off, so as to ensure the working stability of the piston disc, make the beverage preparation equipment work more stably, and better ensure the quality of the beverage. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0046] Figure 1 This is a structural schematic diagram of an embodiment of a piston assembly provided by the present utility model;

[0047] Figure 2 for Figure 1 An exploded structural diagram of the piston assembly;

[0048] Figure 3 for Figure 1 A schematic cross-sectional view of the piston assembly;

[0049] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of detail A;

[0050] Figure 5 A schematic structural diagram of another embodiment of a piston assembly provided by the present utility model;

[0051] Figure 6 for Figure 5 An exploded structural diagram of the piston assembly;

[0052] Figure 7 for Figure 5 A schematic cross-sectional view of the piston assembly;

[0053] Figure 8 for Figure 7 A schematic diagram of the enlarged structure of detail B;

[0054] Figure 9 for Figure 1 Schematic diagram of the structure of the middle piston disc;

[0055] Figure 10 for Figure 9 Schematic diagram of the exploded structure of the middle piston disc;

[0056] Figure 11 for Figure 9 Schematic diagram of the cross-sectional structure of the middle piston disc.

[0057] Description of Figure Numbers:

[0058] 100-piston assembly; 1-piston rod; 11-piston main rod; 111-extension portion; 112-first resisting portion; 12-conduit; 2-piston disc; 21-filter structure; 211-filter screen; 2111-screen body; 2112-flange; 212-filter frame; 2121-first crimping surface; 2122-first hook; 22-support structure; 221-support disc; 2211-protrusion; 2212-limiting rib; 2213-guide groove; 2214-annular boss; 2215-clamping bulge; 2216-receiving groove; 222-support column; 2221-through hole; 2222-second resisting portion; 3-first sealing member; 4-second sealing member; 5-locking member; 6-third sealing member; 7-fourth sealing member.

[0059] The realization of the purpose, functional features and excellent effects of the utility model will be further explained below with reference to specific embodiments and drawings. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0061] It should be noted that if directional indications are involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0062] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0063] The present invention provides a beverage preparation device, which may be, but is not limited to, a coffee machine, a soybean milk machine, or a juicer. For ease of understanding, the following description will be based on a coffee machine as an example, and other devices may be adapted accordingly.

[0064] Specifically, the beverage preparation device includes a brewing cylinder and two piston assemblies 100. The brewing cylinder is hollow and open at both ends, and the two piston assemblies 100 are respectively arranged at the open ends of the brewing cylinder. Preferably, the brewing cylinder is roughly cylindrical, and the two piston assemblies 100 are movable so as to be able to move back and forth along the axial direction of the brewing cylinder. After the brewing cylinder receives the ground coffee powder, hot water is injected into the brewing cylinder, and the two piston assemblies 100 move closer to each other to pressurize the brewing cylinder, thereby achieving high-temperature extraction of the coffee. The extracted coffee liquid can be guided into the finished product discharge pipe through the piston assembly 100 to be discharged from the liquid outlet of the coffee machine.

[0065] For the piston assembly 100, Figure 1 、 Figure 2 、 Figure 5 and Figure 6 As shown, the piston assembly 100 includes a piston rod 1 and a piston disc 2. The piston rod 1 can be adapted to be connected to other components within the coffee machine, such as a drive component, to drive the piston rod 1 to reciprocate along the axial direction of the brewing cylinder. Furthermore, the piston rod 1 is provided with a flow guide channel along its length, through which the coffee liquid can be guided and transmitted; the piston disc 2 is provided at one end of the piston rod 1 along its length, and the flow guide portion of the piston disc 2 is connected to the flow guide channel. When the piston assembly 100 is extended into the brewing cylinder, the piston disc 2 is located at the front end of the piston rod 1 along its movement direction, and the piston disc 2 contacts the coffee liquid in the brewing cylinder, so that the coffee liquid enters the flow guide channel within the piston rod 1 after passing through the piston disc 2, and is then directed to other locations within the coffee machine.

[0066] It should be noted that when the coffee machine is in normal use, the axial direction of the brewing cylinder is set in the vertical direction, and the two piston assemblies 100 are respectively located at the upper and lower ends of the brewing cylinder. Therefore, the piston assembly 100 at the upper end is the upper piston assembly, which further includes an upper piston rod and an upper piston disc, that is, the upper piston disc is located at the bottom of the upper piston rod; the piston rod 1 at the lower end is the lower piston assembly, which further includes a lower piston rod and a lower piston disc, and the lower piston disc is located at the top of the lower piston rod. The two piston assemblies 100 are distinguished for better understanding.

[0067] The structures of the two piston assemblies 100 can be roughly arranged in the same manner. Figures 1 to 3 As shown, each piston rod member 1 includes a hollow piston rod 11 and a conduit 12 sleeved inside the piston rod 11. At least a portion of the piston rod 11 extends outside the brewing cylinder to connect with other components within the coffee machine. The inner side of the conduit 12 forms a flow channel, which communicates with a flow guide portion on the piston plate 2. Coffee liquid in the brewing cylinder can be directed from the flow guide portion of the piston plate 2 into the conduit 12, and then directed to other locations within the coffee machine via the conduit 12.

[0068] The piston rod 11 is generally cylindrical and extends longitudinally along the axial direction of the brewing cylinder, that is, in the vertical direction. The guide tube 12 is fixedly sleeved within the piston rod 11. The piston rod 11 is driven by a driving mechanism to move the piston plate 2 along the axial direction of the brewing cylinder, thereby increasing the pressure within the brewing cylinder and achieving high-temperature extraction of the coffee liquid. Furthermore, the piston assembly 100 can be removed from the brewing cylinder to facilitate the collection of coffee powder.

[0069] For the piston disc 2, specifically, Figures 9 to 11 As shown, the piston disc 2 includes a filtering structure 21 and a supporting structure 22, the filtering structure 21 includes a filtering portion and a first connecting portion, the first connecting portion is arranged on the outer peripheral side of the filtering portion; the supporting structure 22 includes a guide portion, and a second connecting portion arranged around the outer peripheral side of the guide portion; wherein the filtering structure 21 and the supporting structure 22 are integrally formed, so that the first connecting portion and the second connecting portion are connected, and the filtering portion and the guide portion are connected, so that liquid can flow into one of the filtering portion and the guide portion and flow out of the other.

[0070] In this embodiment, the filter portion can be used to filter liquid (such as coffee liquid), and the support structure 22 includes a guide portion and a second connecting portion. The guide portion is connected to the filter portion, and the guide portion can guide the filtered liquid to other locations (such as a finished product discharge pipe), or, the liquid can be guided to the filter portion through the guide portion; and by forming the filter structure 21 and the support structure 22 into an integrally formed arrangement, the first connecting portion and the second connecting portion are connected, and are manufactured through an integral molding process, so that the connection between the first connecting portion and the second connecting portion is more reliable and not easy to loosen and fall off, so as to ensure the working stability of the piston disk 2, and make the beverage preparation equipment work more stably and better ensure the quality of the beverage.

[0071] Further, combined with Figures 9 to 11 As shown, the filter structure 21 includes a filter screen 211 and a filter frame 212. The filter portion is formed in the middle of the filter screen 211, and the coffee liquid can be filtered through the filter portion; the filter frame 212 is arranged around the outer peripheral side of the filter screen 211 and is clamped with the support structure 22. The edge portion of the filter screen 211 and the filter frame 212 form a first connecting portion, and the filter frame 212 presses the edge portion of the filter screen 211 between the filter frame 212 and the support structure 22. The filter screen 211, the filter frame 212 and the support structure 22 are integrally formed, so that the filter screen 211 and the filter frame 212 can be firmly fixed on the support structure 22, which can achieve coffee liquid filtration while ensuring the stability of the piston disc 2.

[0072] The filter frame 212 and the support structure 22 can both be made of plastic, while the filter screen 211 can be made of metal. Specifically, when manufacturing the piston disc 2, the support structure 22 can first be injection molded using an injection mold, while the filter screen 211 is also stamped separately. The filter screen 211 is then mounted on the support structure 22, and the filter screen 211 and the support structure 22 are placed together in another injection mold and injection molded again to form the filter frame 212. The filter frame 212 can relatively fix the filter screen 211 and the support structure 22 through injection molding, thereby making the connection more reliable and stable, not easy to loosen, and extending the service life of the piston disc 2.

[0073] The support structure 22 can support and fix the filter screen 211 and is connected to the piston rod 1. Figures 9 to 11As shown, the support structure 22 includes a support disc 221 and a support column 222. The support disc 221 is generally disc-shaped and has two sides arranged along its axial direction. At least one communication channel is provided on the side of the support disc 221 facing the filter portion. The communication channel forms a liquid flow space between the filter screen 211 and the support disc 221. The support column 222 is provided on the other side of the support disc 221. The support column 222 is provided with a through hole 2221, and the through hole 2221 is provided through the support disc 221. The through hole 2221 and the at least one communication channel together form the aforementioned guide portion. At least a portion of the support column 222 can extend into the piston main rod 11, and the through hole 2221 is sleeved on the outer circumference of the conduit 12, so that the through hole 2221 is connected to the conduit 12. A plurality of filter holes are formed on the filter screen 211, and at least one connecting channel connects the through hole 2221 and the plurality of filter holes. The coffee liquid can enter the at least one connecting channel through the filter screen 211, and then enter the through hole 2221 through the connecting channel, and then enter the conduit 12 of the piston rod 1 through the through hole 2221 to be guided to the target position (such as the coffee liquid outlet).

[0074] Further, combined with Figure 10 and Figure 11 As shown, the filter screen 211 includes a screen body 2111 and a flange 2112 extending from the edge of the screen body 2111 along its side, the flange 2112 overlaps the outer peripheral side of the support plate 221, and preferably, the flange 2112 is arranged in a full circle ring shape to surround various locations on the outer peripheral side of the support plate 221 to ensure a better connection effect; the filter frame 212 has a first pressing surface 2121 pressed on the side of the screen body 2111 facing away from the support plate 221, and a first hook 2122 extending from the first pressing surface 2121 along its side, a protrusion 2211 is provided on the outer peripheral side of the support plate 221, the first hook 2122 is clamped with the protrusion 2211, and is pressed on the outer peripheral side of the flange 2112. The edge of the net body 2111 is crimped through the first crimping surface 2121, and the flange 2112 of the filter net 211 can be crimped through the first hook 2122, so that the filter net 211 is limited in both radial and axial directions, thereby having a better fixing effect and a more consistent connection effect at each location, thereby better ensuring that the filter net 211 is not easy to fall off.

[0075] It is understood that there are many ways to configure the communication channel. Preferably, the support plate 221 is concavely configured on one side facing the support column 222 to form a groove, and the filter screen 211 is covered at the notch of the groove, forming a filtering gap between the filter screen 211 and the groove. The bottom of the groove is provided with a plurality of limiting ribs 2212 protruding from the bottom of the groove. The plurality of limiting ribs 2212 enclose at least one communication channel. The plurality of limiting ribs 2212 can divide the interior of the groove to form channels for the circulation of coffee liquid, so that the coffee liquid can better flow toward the through hole 2221. After the coffee liquid enters the through hole 2221, the size of the flow path becomes smaller, which can increase the flow rate of the coffee liquid after entering the piston rod 1 and the discharge rate of the coffee liquid.

[0076] Furthermore, if Figure 10 As shown in FIG, multiple limiting ribs 2212 are annularly arranged around the outer circumference of the through-hole 2221. Multiple limiting ribs 2212 on the same circumferential surface form a limiting rib group 2212, and the multiple limiting rib groups 2212 are sequentially arranged inside and outside each other. A connecting channel is formed between each two adjacent groups of limiting ribs 2212, and multiple filter holes are provided corresponding to the spacing between each two adjacent groups of limiting ribs 2212. Because the inner cavity of the brewer and the filter 211 are both circular, the multiple limiting ribs 2212 are arranged in an annular shape. This allows the coffee liquid to better enter the corresponding connecting channels after passing through the filter 211. The coffee liquid is then guided through each connecting channel, resulting in a more consistent guiding effect at each location and better flow to the through-hole 2221.

[0077] Moreover, combined Figure 10 and Figure 11 As shown, the bottom of the groove is further provided with a plurality of guide grooves 2213. These guide grooves 2213 are radially arranged along the through-hole 2221 and extend from the through-hole 2221 toward the edge of the support plate 221. Each guide groove 2213 is disposed between the plurality of groups of limiting ribs 2212 and is in communication with each group of limiting ribs 2212. Preferably, the through-hole 2221 is located in the center of the support plate 221. The guide grooves 2213 are radially arranged, extending from the through-hole 2221 toward the edge. This allows coffee liquid entering each connecting channel to flow into the nearest guide groove 2213, which then guides the coffee liquid into the through-hole 2221. Furthermore, chamfers are provided around the perimeter of the through-hole 2221 to facilitate the flow of coffee liquid within each guide groove 2213 into the through-hole 2221.

[0078] A first sealing member 3 is provided between the outer circumference of the conduit 12 and the inner circumference of the through hole 2221. The first sealing member 3 seals the gap between the conduit 12 and the through hole 2221 to prevent coffee liquid from entering between the conduit 12 and the piston main rod 11. Preferably, the first sealing member 3 is configured as a first sealing ring.

[0079] Moreover, combined Figure 4 and Figure 8 As shown, an extension portion 111 is provided at one end where the piston main rod 11 is connected to the piston disc 2. The extension portion 111 extends radially outward from the piston main rod 11. A clamping portion is provided on the support disc 221, which is clamped to the end of the extension portion 111 to fix the piston disc 2 on the piston rod 1.

[0080] Furthermore, an annular boss 2214 is protruded on the side of the support plate 221 facing away from the filter portion, and the annular boss 2214 is arranged around the outer peripheral side of the support column 222 so as to be spaced apart from the support column 222. The clamping portion includes a clamping protrusion 2215 protruding from the inner ring side of the annular boss 2214, and the extension portion 111 is located in the interval between the annular boss 2214 and the support column 222 so as to be clamped with the clamping protrusion 2215. The structure is more compact and occupies less space.

[0081] In one embodiment, combining Figure 7 and Figure 8 As shown, the inner side of the piston main rod 11 may be provided with a first stop portion 112, the end of the support column 222 extending into the piston main rod 11 abuts against the first stop portion 112, and a second stop portion 2222 is provided on the inner side of the through hole 2221. The first sealing member 3 is located between the first stop portion 112 and the second stop portion 2222, and the thickness of the first sealing member 3 is slightly smaller than the distance between the first stop portion 112 and the second stop portion 2222; the piston assembly 100 also includes a locking member 5 sleeved on the outer side of the piston main rod 11, and the locking member 5 has a locking function that locks on the piston The first stop 112 is in a locked state on the rod 1, and is in an unlocked state unlocked from the piston rod 1; when in the locked state, the first resisting portion 112 can pressurize the first sealing member 3, driving the first sealing member 3 to deform and pressurize the second resisting portion 2222, so that the clamping portion connected to the second resisting portion 2222 moves in the direction of being clamped with the extension portion 111, thereby ensuring that after the locking member 5 is locked, the clamping portion and the extension portion 111 remain in a clamped state and are not easy to loosen, thereby ensuring the reliability of the connection between the piston disc 2 and the piston rod 1.

[0082] Moreover, if Figure 8As shown in FIG, a third sealing member 6 and a fourth sealing member 7 may be further provided on the outer circumference of the support disk 221. The third sealing member 6 may be provided as an O-ring and sleeved on the outer side of the annular boss 2214. The fourth sealing member 7 sleeves on the outer circumference of the third sealing member 6. The third sealing member 6 and the fourth sealing member 7 are located in the gap between the locking member 5 and the support disk 221 to form a double seal between the locking member 5 and the support disk 221.

[0083] In another embodiment, combined Figure 3 and Figure 4 As shown, the piston assembly 100 may include a locking member 5 and a second sealing member 4 sleeved on the outer ring side of the annular boss 2214. The locking member 5 has a locked state, in which it is locked to the piston rod member 1, and an unlocked state, in which it is unlocked from the piston rod member 1. When the locking member 5 is in the locked state, the locking member 5 can press against the second sealing member 4, driving the second sealing member 4 to deform and squeeze the clamping portion toward the direction of clamping with the extension portion 111. The deformation of the second sealing member 4 acts on the clamping portion to ensure that the clamping portion and the extension portion 111 are clamped, thereby ensuring a reliable connection between the piston disc 2 and the piston rod member 1.

[0084] Among them, the second seal 4 can be set as a "Y"-shaped sealing ring, which is pressed against the end of the second seal 4 through the locking member 5, so that the second seal 4 is deformed in the radial direction of the support disk 221, thereby pushing the annular boss 2214 to deform, so that the locking protrusion 2215 moves toward the direction close to the support column 222, so that the clamping amount is larger and the piston disk 2 is not easy to loosen.

[0085] Moreover, if Figure 4 As shown in the figure, the filter frame 212 and the support structure 22 are formed with a receiving groove 2216 on the side facing away from the filter portion. The locking member 5 can press at least a portion of the second seal 4 into the receiving groove 2216, so that one side of the "Y"-shaped sealing ring can be inserted into the receiving groove 2216. The locking member 5 and the receiving groove 2216 make the second seal 4 less likely to shift and the fixation more reliable, so that the deformation force generated can better act on the clamping portion.

[0086] In the above two embodiments, the connection method between the locking member 5 and the piston rod member 1 is roughly the same. The locking member 5 is connected to the piston rod member 1 by a threaded connection. An external thread is provided at one end of the piston main rod 11 near the extension portion 111. The locking member 5 is arranged in an annular shape, is sleeved on the outer peripheral side of the piston main rod 11, and is provided with an internal thread that engages with the external thread. When the locking member 5 is engaged and locked with the piston main rod 11, the locking member 5 is pressed against the second sealing member 4, driving the second sealing member 4 to deform and thereby making the clamping portion and the extension portion 111 clamped more tightly. Alternatively, when the locking member 5 is engaged and locked with the piston main rod 11, the first stop portion 112 of the piston rod member 1 can apply pressure to the first sealing member 3, and the deformation of the first sealing member 3 can act on the second stop portion 2222, thereby driving the clamping portion connected to the second stop portion 2222 to move toward the support column 222.

[0087] It can be understood that in the same brewer, the two piston assemblies 100 can be arranged in a consistent manner to be located at the two ends of the brewing cylinder respectively.

[0088] In another embodiment, the two piston assemblies 100 may also be arranged differently. For example, the two piston assemblies 100 in the above two embodiments may be respectively arranged at the two ends of the brewing cylinder. Specifically, since the upper piston assembly has a larger movement stroke than the lower piston assembly in the vertical direction, the upper piston assembly can more reliably fix the piston disc 2 on the piston rod 1 by pressing the second sealing ring with the locking member 5, so that the "Y"-shaped sealing ring contacts and seals with the inner cylinder wall of the brewing cylinder, ensuring a better sealing effect while facilitating movement. To ensure a better sealing effect, the lower piston assembly forms a surface-to-surface contact with the inner cylinder wall of the brewing cylinder through the fourth sealing ring on the lower piston assembly, which can increase the contact area and make the sealing effect better and more stable.

[0089] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure made using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A piston disc, characterized in that: include: The filter structure includes a filter portion and a first connecting portion, wherein the first connecting portion is provided on the outer peripheral side of the filter portion; The supporting structure includes a guide portion and a second connecting portion arranged around the outer periphery of the guide portion; The filtering structure and the supporting structure are integrally formed so that the first connecting portion and the second connecting portion are connected, and the filtering portion and the guide portion are in communication, and liquid can flow into one of the filtering portion and the guide portion and flow out of the other.

2. The piston disc according to claim 1, characterized in that The filtering structure comprises: A filter screen, wherein the filter portion is formed in the middle of the filter screen; A filter frame is arranged around the outer peripheral side of the filter net and is clamped with the support structure. The edge portion of the filter net and the filter frame form the first connecting portion. The filter frame presses the edge portion of the filter net between the filter frame and the support structure. The filter net, the filter frame and the support structure are integrally formed.

3. The piston disc according to claim 2, characterized in that A plurality of filter holes are formed on the filter net, and the support structure includes: A support plate, wherein at least one communication channel is provided on a side of the support plate facing the filter portion; A support column is provided on the other side of the support plate, and a through hole is provided on the support column, and the through hole is set to pass through the support plate, and the through hole and at least one connecting channel jointly form the guide portion, and at least one connecting channel connects the through hole and multiple filter holes.

4. The piston disc according to claim 3, characterized in that The filter screen includes a screen body and a flange extending from the edge of the screen body along the side thereof, wherein the flange is overlapped with the outer peripheral side of the support plate; The filter frame has a first pressing surface pressed onto the side of the net body facing away from the support plate, and a first hook extending from the first pressing surface along its side. A protrusion is provided on the outer peripheral side of the support plate, and the first hook is engaged with the protrusion and pressed onto the outer peripheral side of the flange.

5. The piston disc according to claim 3, wherein: The support plate is concavely arranged on one side facing the support column to form a groove, and the filter cover is arranged at the notch of the groove; A plurality of limiting ribs are protruding from the bottom of the groove, and the plurality of limiting ribs are enclosed to form at least one communicating channel.

6. The piston disc according to claim 5, characterized in that The plurality of limiting ribs are annularly arranged around the outer circumference of the through hole, and the plurality of limiting ribs on the same circumferential surface form a limiting rib group, and the plurality of limiting rib groups are sequentially arranged inside and outside.

7. The piston disc according to claim 6, characterized in that The bottom of the groove is also provided with a plurality of guide grooves, and the plurality of guide grooves are all arranged along the radial direction of the through hole and extend from the through hole toward the edge of the support plate. Each of the guide grooves is arranged between multiple groups of the limiting rib groups and is connected to each group of the limiting rib groups.

8. The piston disc according to claim 6, wherein: The plurality of filtering holes are arranged corresponding to the spacing area between each two adjacent groups of the limiting rib groups.

9. A piston assembly, characterized in that: include: The piston rod has a flow guide channel arranged along its length; The piston disc according to any one of claims 1 to 8, wherein the piston disc is provided at one end of the piston rod along its length direction, and the guide portion of the piston disc is connected to the guide channel.

10. The piston assembly according to claim 9, wherein: The piston rod member includes a hollow piston main rod and a conduit sleeved on the inner side of the piston main rod. The inner side of the conduit forms the diversion channel, and the conduit is communicated with the diversion part.

11. The piston assembly according to claim 10, wherein: The support structure includes a support plate and a support column, and the support column is provided with a through hole; At least a portion of the support column extends into the piston main rod, and the through hole is sleeved on the outer peripheral side of the conduit.

12. The piston assembly according to claim 11, wherein A first sealing member is provided between the outer peripheral side of the conduit and the inner peripheral side of the through hole.

13. The piston assembly according to claim 12, wherein: An extension portion is provided at one end of the piston main rod connected to the piston disc. The extension portion is radially extended outward from the piston main rod. A clamping portion is provided on the support disc. The clamping portion is clamped to the end of the extension portion.

14. The piston assembly according to claim 13, wherein: An annular boss is protruding from the side of the support plate facing away from the filter portion, and the annular boss is arranged around the outer circumference of the support column. The clamping portion includes a clamping protrusion protruding from the inner ring side of the annular boss, and the extension portion is located in the gap between the annular boss and the support column, and is clamped with the clamping protrusion.

15. The piston assembly according to claim 14, wherein: A first stopper is provided on the inner side of the piston main rod, and the end of the support column extending into the piston main rod abuts against the first stopper. A second stopper is provided on the inner side of the through hole, and the first sealing member is located between the first stopper and the second stopper. The piston assembly further includes a locking member sleeved on the outer side of the piston main rod, wherein the locking member has a locked state in which it is locked on the piston rod and an unlocked state in which it is unlocked from the piston rod; When in the locked state, the first resisting portion can pressurize the first sealing member, driving the first sealing member to deform and pressurize the second resisting portion, so that the clamping portion connected to the second resisting portion moves in the direction of clamping with the extension portion.

16. The piston assembly according to claim 14, wherein: The piston assembly further includes a locking member and a second sealing member sleeved on the outer ring side of the annular boss, wherein the locking member has a locked state in which it is locked on the piston rod member and an unlocked state in which it is unlocked from the piston rod member; When the locking member is in the locking state, the locking member can press the second sealing member to drive the second sealing member to deform and squeeze the clamping portion to move in a direction of clamping with the extension portion.

17. The piston assembly according to claim 16, wherein: The piston main rod is provided with an external thread at one end close to the extension portion, and the locking member is sleeved on the outer peripheral side of the piston main rod and is provided with an internal thread engaged with the external thread; When the locking member is engaged and locked with the piston main rod, the locking member is pressed onto the second sealing member.

18. The piston assembly according to claim 16, wherein: The filter structure includes a filter screen and a filter frame. The filter frame is clamped on the outer peripheral side of the support structure, and the edge portion of the filter screen is pressed between the filter frame and the support structure. The filter frame and the support structure are formed with a receiving groove on the side facing away from the filter part. The locking member can press at least a portion of the second seal into the receiving groove.

19. A brewing device, characterized in that: include: The brewing cylinder is hollow with both ends open; Two piston assemblies according to any one of claims 9 to 18, wherein the two piston assemblies are respectively located at the open ends of the brewing cylinder.

20. A beverage preparation device, characterized in that: Comprising the brewing device as claimed in claim 19.

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