Brewing cylinder, brewing module and beverage processing equipment

Through the design of inner and outer cylinder blocks with inner and outer sleeves, the inner cylinder block improves wear resistance and the outer cylinder block reduces overall cost, solving the problem of high processing and maintenance costs of brewing cylinders, and achieving a cost-effective brewing cylinder structure.

CN223054285UActive Publication Date: 2025-07-04CAYE TECHNOLOGY (SUZHOU) CO LTD
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Patent Information

Application Number
CN202421377212.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-17
Publication Date
2025-07-04
Estimated Expiration
2034-06-17

AI Technical Summary

Technical Problem

The brewing cylinders of existing beverage and cooking equipment are expensive to process and maintain, and they need to be replaced as a whole, resulting in waste.

Method used

The inner and outer cylinder blocks are designed with inner and outer sleeves. The inner cylinder block material has high hardness to improve wear resistance, the outer cylinder block material has low hardness to reduce overall cost, and the insulation performance of the outer cylinder block is designed as needed.

Benefits of technology

By replacing the inner cylinder separately reduces maintenance costs, and the outer cylinder assists in providing insulation performance, achieving a cost-effective brewing cylinder structure design.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The utility model discloses a brewing cylinder, a brewing module and beverage processing equipment. The brewing cylinder comprises an inner cylinder body and an outer cylinder body which are at least partially sleeved inside and outside; the material hardness of the inner cylinder body is larger than that of the outer cylinder body. According to the utility model, the structural design can be independently carried out on the inner cylinder body according to the actual requirement, so that the inner cylinder body has higher material hardness, the wear resistance of the inner cylinder body can meet the requirement, especially when the inner cylinder body needs to be replaced due to wear, only the inner cylinder body needs to be replaced, and compared with the prior art that the whole brewing cylinder is processed and replaced, the manufacturing cost is reduced. According to the utility model, the cost loss is lower; in addition, the outer cylinder body is arranged to have relatively low material hardness, the overall cost of the brewing cylinder is reduced, but according to actual requirements, the outer cylinder body is independently subjected to structural design, so that the outer cylinder body assists in having the thermal insulation performance and the like required by the brewing cylinder, and the overall structural performance of the brewing cylinder meets the requirements.
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Description

Technical Field

[0001] The utility model relates to the technical field of beverage processing equipment, and particularly relates to a brewing cylinder, a brewing module and beverage processing equipment. Background Art

[0002] Existing beverage processing equipment such as coffee machines is provided with a brewing cylinder for extracting and brewing coffee powder. To meet the extraction requirements, the brewing cylinder generally needs to have sufficient wear resistance and heat preservation performance, which requires a high structural requirement for the brewing cylinder, resulting in an increase in the processing cost of a single brewing cylinder. Moreover, after the brewing cylinder is worn, the entire brewing cylinder needs to be replaced, resulting in an increase in the maintenance cost of the whole machine. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a brewing cylinder, a brewing module and beverage processing equipment, aiming to solve the problem of high processing and replacement costs of traditional brewing cylinders.

[0004] To achieve the above purpose, a brewing cylinder proposed by the utility model includes an inner cylinder body and an outer cylinder body that are at least partially sleeved inside and outside each other;

[0005] Wherein, the material hardness of the inner cylinder body is greater than that of the outer cylinder body.

[0006] Optionally, both the inner cylinder body and the outer cylinder body are made of metal materials; or,

[0007] The inner cylinder body is made of ceramic materials.

[0008] Optionally, the processing accuracy of the inner cylinder body is not lower than that of the outer cylinder body; and / or,

[0009] The cross-sectional shape of the inner cylinder body is circular.

[0010] Optionally, the outer peripheral side wall of the inner cylinder body extends in a stepped shape along its own length direction to form a first cylinder body section with a larger outer diameter and a second cylinder body section with a smaller outer diameter;

[0011] The outer cylinder body is sleeved at the second cylinder body section, and the end wall of the outer cylinder body abuts against the end wall of the first cylinder body section.

[0012] Optionally, an annular groove is annularly provided on the outer peripheral side wall of the inner cylinder body along its circumferential direction, and a limiting hole is radially penetrated through the outer cylinder body at a position corresponding to the annular groove, and the limiting hole communicates with the annular groove;

[0013] The brewing cylinder further includes a limiting member, and the limiting member is inserted through the communication position between the limiting hole and the annular groove.

[0014] Optionally, the brewing cylinder further comprises a connecting cylinder, which is used to be sleeved with the driving member, and the connecting cylinder is located on one lateral side of the outer cylinder and is connected to the outer cylinder via a connecting rib.

[0015] Optionally, the connecting cylinder, the connecting ribs and the outer cylinder are integrally formed.

[0016] Optionally, the outer peripheral side wall of the inner cylinder body extends in a stepped shape along its length direction to form a first cylinder body section with a larger outer diameter and a second cylinder body section with a smaller outer diameter, and the outer cylinder body is sleeved on the second cylinder body section and abuts against the first cylinder body section;

[0017] Wherein, the connecting cylinder and / or the connecting rib extend along their own length direction to exceed the second cylinder section or the first cylinder section, and the exceeding portion has an assembly surface facing the first cylinder section, and the shape of the assembly surface is adapted to the shape of the side surface at the position of the first cylinder section.

[0018] In addition, to achieve the above purpose, the utility model also provides a brewing module, including:

[0019] The brewing cylinder as described above is movably arranged to have a powder receiving position and a brewing position; and,

[0020] A driving mechanism is drivingly connected to the brewing cylinder.

[0021] In addition, in order to achieve the above-mentioned purpose, the utility model also provides a brewing module, which is characterized by comprising:

[0022] The brewing cylinder as described above is movably arranged to have a powder receiving position and a brewing position; and,

[0023] A driving mechanism, comprising a movably arranged driving member;

[0024] The connecting cylinder is sleeved on the outside of the driving member, and the connecting cylinder is rotatable relative to the driving member to drive the inner cylinder and the outer cylinder to rotate around the driving member to the powder receiving position and the brewing position.

[0025] In addition, to achieve the above-mentioned purpose, the utility model also provides a beverage preparation device, characterized in that it includes the brewing module as described above.

[0026] In the technical solution provided by the present utility model, the brewing cylinder is composed of an inner cylinder body and an outer cylinder body which are sleeved inside and outside. According to actual needs, the inner cylinder body can be structurally designed independently to make the inner cylinder body have a higher material hardness, so that the wear resistance of the inner cylinder body meets the requirements. Especially when replacement is required due to wear, only the inner cylinder body needs to be replaced. Compared with the processing and replacement of the entire brewing cylinder in the prior art, the present utility model has lower cost loss. In addition, the outer cylinder body is set to have a relatively low material hardness, which helps to reduce the overall cost of the brewing cylinder. However, according to actual needs, through the structural design of the outer cylinder body alone, the outer cylinder body is assisted to have functions required for the brewing cylinder, such as heat preservation performance, etc., so that the overall structural performance of the brewing cylinder meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0028] Figure 1 A three-dimensional schematic diagram of an embodiment of the brewing cylinder provided by the present utility model;

[0029] Figure 2 is Figure 1 The main structure decomposition schematic diagram of the brewing cylinder in

[0030] Figure 3 is Figure 1 The top view schematic diagram of the brewing cylinder in

[0031] Figure 4 is Figure 3 The sectional structure schematic diagram at A-A in

[0032] Figure 5 A three-dimensional schematic diagram of an embodiment of the brewing module provided by the present utility model;

[0033] Figure 6 is Figure 5 The partial structure decomposition schematic diagram of the brewing module in

[0034] Explanation of the reference numerals in the drawings:

[0035] 100 brewing cylinder; 110 inner cylinder body; 111 first cylinder body section; 112 second cylinder body section; 113 annular groove; 114 brewing chamber; 120 outer cylinder body; 121 limiting hole; 130 limiting member; 140 connecting cylinder body; 141 assembly surface; 150 connecting rib; 210 driving member; 220 guide member; 230 driver; 240 linkage vertical rod; 250 linkage horizontal rod; 300 lower piston member.

[0036] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. 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 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 utility model.

[0040] See also Figures 1 to 6 The utility model provides a brewing cylinder 100, which is used in a brewing module, and the brewing module is mainly used in a beverage preparation device. It can be understood that the beverage preparation device can be any preparation device that prepares raw materials into beverages in any way, and can be but not limited to a fully automatic or semi-automatic coffee machine, a soybean milk machine, a food processor, etc.

[0041] Among them, taking a coffee machine as an example, the brewing cylinder 100 is used to press coffee powder into a cake and then extract and brew to obtain coffee liquid. Therefore, when the brewing cylinder 100 is applied to a brewing module, the brewing module at least includes an upper piston member and / or a lower piston member 300. The brewing cylinder 100 is vertically penetrated with a brewing cavity 114, and the upper piston member and / or the lower piston member 300 can move up and down in the brewing cavity 114 in the vertical direction.

[0042] In a specific application, when the upper piston member moves outwards from the brewing cavity 114, the lower piston member 300 moves downwards to a preset position, so as to reserve enough space in the brewing cavity 114 to access coffee powder. The coffee powder is stacked on the upper surface of the lower piston member 300, roughly in a conical shape. At this time, the lower piston member 300 can be operated to perform a powder shaking stroke of moving up and down, and the conical powder can be shaken flat.

[0043] Then, the upper piston member and / or the lower piston member 300 perform a powder pressing stroke of moving up and down in the brewing cavity 114 to press the powder received by the lower piston member 300 into a powder cake.

[0044] Finally, the brewing module further includes a liquid supply component, and the liquid supply component can connect hot water into the brewing cavity 114 to extract the powder cake in the brewing cavity 114.

[0045] In this process, at least the outer peripheral side walls of the upper piston member and / or the lower piston member 300 need to be in sliding contact with the inner cavity wall of the brewing cavity 114. Since mutual friction will occur during the sliding process, it is easy to cause wear of the inner cavity wall of the brewing cavity 114. Therefore, at least the inner cavity wall of the brewing cavity 114 needs to have sufficient wear resistance.

[0046] In view of this, the present utility model also provides a brewing cylinder 100, which includes an inner cylinder body 110 and an outer cylinder body 120 that are at least partially sleeved inside and outside; wherein, the material hardness of the inner cylinder body 110 is greater than the material hardness of the outer cylinder body 120.

[0047] In the technical solution provided by the present utility model, the brewing cylinder 100 is composed of an inner cylinder body 110 and an outer cylinder body 120 which are sleeved inside and outside each other. According to actual needs, the inner cylinder body 110 can be structurally designed independently, so that the inner cylinder body 110 has a higher material hardness, thereby enabling the wear resistance of the inner cylinder body 110 to meet the requirements. Especially when replacement is required due to wear, only the inner cylinder body 110 needs to be replaced. Compared with the processing and replacement of the entire brewing cylinder 100 in the prior art, the present utility model has lower cost loss. In addition, the outer cylinder body 120 is set to have a relatively low material hardness, which helps to reduce the overall cost of the brewing cylinder 100. However, according to actual needs, through the independent structural design of the outer cylinder body 120, the outer cylinder body 120 is assisted to have functions required for the brewing cylinder 100, such as heat preservation performance, etc., so that the overall structural performance of the brewing cylinder 100 meets the requirements.

[0048] It can be understood that the inner cylinder body 110 is provided with a brewing cavity 114 through penetration. The outer cylinder body 120 is sleeved on the outside of the inner cylinder body 110. Among them, the outer cylinder body 120 can cover all the outer peripheral side walls of the inner cylinder body 110, or the outer cylinder body 120 covers a partial outer peripheral side wall of the inner cylinder body 110. The entire cylinder section of the outer cylinder body 120 along its length direction (i.e., the above-mentioned vertical direction) is sleeved on the outside of the inner cylinder body 110, or a partial cylinder section of the outer cylinder body 120 along its length direction is sleeved on the outside of the inner cylinder body 110, and the remaining cylinder section protrudes relative to the inner cylinder body 110.

[0049] The material hardness of the inner cylinder body 110 and the outer cylinder body 120 can be differentiated through various solutions:

[0050] For example, in an embodiment, the inner cylinder body 110 and the outer cylinder body 120 can be set to be made of different materials, by virtue of the material hardness inherent in different materials. At this time, both the inner cylinder body 110 and the outer cylinder body 120 can be made of metal materials. However, the metal material used to make the inner cylinder body 110 has a relatively higher material hardness. Or the inner cylinder body 110 is made of ceramic material, and the outer cylinder body 120 can be made of any material with a hardness less than that of the ceramic. Ceramic materials themselves have high hardness, so they are sufficiently wear-resistant and not easily worn. The thermal conductivity of ceramic materials themselves is lower than that of metal materials, and they are good heat insulation materials, which can achieve the required heat preservation effect. Ceramic materials also have characteristics such as being good electrical insulation materials, not easily oxidized at high temperatures, and having good corrosion resistance, which are sufficient to meet the usage requirements of the brewing cylinder 100.

[0051] Or in an embodiment, the material hardness of the inner cylinder body 110 and the outer cylinder body 120 can be differentiated by adjusting the chemical composition, processing technology, etc. in the same manufacturing material.

[0052] In addition, the machining accuracy of the inner cylinder body 110 is set to be not lower than that of the outer cylinder body 120, such that the inner cylinder body 110 is higher than the outer cylinder body 120 in one or several aspects among dimensional accuracy, form accuracy, position accuracy, dimensional accuracy, surface roughness, machining stability, etc. Among them, when the dimensional accuracy of the inner cylinder body 110 is relatively higher, it can be more precisely assembled with, for example, the upper piston part and / or the lower piston part 300; when the surface roughness is lower, the frictional loss between the inner cavity wall of the brewing chamber 114 and the upper piston part and / or the lower piston part 300 can be reduced.

[0053] The cross-sectional shape of the inner cylinder body 110 can be optionally set to be circular, that is, the inner cylinder body 110 is generally cylindrical. In this way, it is both helpful for the inner cavity wall of the brewing chamber 114 to be better shape-fitted with the outer peripheral side wall of the upper piston part and / or the lower piston part 300, and helpful for simplifying the machining of the inner cylinder body 110.

[0054] In view of the above, the outer cylinder body 120 can cover a part of the outer peripheral side wall of the inner cylinder body 110. Specifically, in one embodiment, the outer peripheral side wall of the inner cylinder body 110 extends in a stepped shape along its own length direction to form a first cylinder body section 111 with a larger outer diameter and a second cylinder body section 112 with a smaller outer diameter. A step surface is formed between the first cylinder body section 111 and the second cylinder body section 112 due to the outer diameter difference, and the step surface faces the side where the second cylinder body section 112 is located. The outer cylinder body 120 is sleeved at the second cylinder body section 112, and the end wall of the outer cylinder body 120 abuts against the above step surface of the first cylinder body section 111. The step surface can limit the sleeving of the outer cylinder body 120 in the vertical direction, achieving a certain positioning effect, such that the sleeving position between the outer cylinder body 120 and the inner cylinder body 110 is more accurate.

[0055] The shape of the step surface is adapted to the shape of the end wall of the outer cylinder body 120. And, the outer diameter of the first cylinder body section 111 is equivalent to the outer diameter of the outer cylinder body 120. That is, the outer peripheral side wall of the first cylinder body section 111 is substantially flush with the outer peripheral side wall of the outer cylinder body 120 sleeved at the second cylinder body section 112, making the overall outer shape of the brewing cylinder 100 flat and more aesthetic.

[0056] Further, in an embodiment, an annular groove 113 is circumferentially provided along the outer peripheral side wall of the inner cylinder body 110. A limiting hole 121 is radially penetrated through the outer cylinder body 120 corresponding to the annular groove 113, and the limiting hole 121 communicates with the annular groove 113. The brewing cylinder 100 further includes a limiting member 130, and the limiting member 130 is disposed at the communication portion between the limiting hole 121 and the annular groove 113. The limiting member 130 is generally rod-shaped or is configured to be adapted to the groove shape of the limiting hole 121 and the annular groove 113 at the position where it is located. When the limiting member 130 is disposed at the communication portion between the limiting hole 121 and the annular groove 113, it can act on both the limiting hole 121 and the annular groove 113 at the same time, can limit the outer cylinder body 120 and the inner cylinder body 110 in the radial direction, can also limit the outer cylinder body 120 and the inner cylinder body 110 in the circumferential direction, and can further limit the outer cylinder body 120 and the inner cylinder body 110 in the axial direction, avoiding relative displacement between the inner cylinder body 110 and the outer cylinder body 120 in the radial direction, axial direction or circumferential direction, and ensuring a more stable socket joint between the inner cylinder body 110 and the outer cylinder body 120.

[0057] In addition, based on any of the above embodiments, when the brewing cylinder 100 is applied in a brewing module, in an embodiment, a brewing cavity 114 is penetrated through the brewing cylinder 100 in the vertical direction, and the lower piston member 300 is movably installed in the brewing cylinder 100 in the vertical direction. The brewing cylinder 100 together with the lower piston member 300 further has a lateral displacement, and thus has a powder receiving position and a brewing position. Among them, when the brewing cylinder 100 together with the lower piston member 300 moves to the powder receiving position, the upper end of the brewing cavity 114 is open, and powder obtained by grinding, for example, by a grinding module, or externally introduced, or directly stored can be accessed. When the brewing cylinder 100 together with the lower piston member 300 moves to the brewing position, the upper end opening of the brewing cavity 114 faces the upper piston member, and the upper piston member can move into the brewing cavity 114 to realize the powder pressing stroke.

[0058] In order to realize the lateral translation of the brewing cylinder 100 together with the lower piston member 300 and the vertical translation of the lower piston member 300 relative to the brewing cylinder 100. In an embodiment, the brewing module further includes a driving mechanism, and the driving mechanism includes a driving member 210, a guiding member 220, a linkage vertical rod 240, a linkage cross rod 250 and a driver 230.

[0059] Among them, the driving member 210 is generally rod-shaped and can perform vertical displacement and lateral rotation around the vertical axis. The driver 230 is directly connected to the driving member 210 or indirectly connected through a transmission assembly. Specifically, the driving member 210 may be provided with external threads on a partial rod segment, and the transmission assembly includes a nut that is in threaded cooperation with the external threads of the driving member 210. When the driver 230 is a motor and is connected to the driving member 210, the driving member 210 can be driven to perform vertical displacement and lateral rotation around the vertical axis.

[0060] The guiding member 220 is sleeved on the outside of the driving member 210, and one of the sockets of the guiding member 220 and the driving member 210 is provided with a guiding protrusion, and the other is provided with a guiding groove. The guiding groove has a horizontally connected segment and a vertically connected segment. Thus, when the guiding protrusion slides relative to the guiding groove, the driving member 210 can be driven to perform lateral displacement and vertical displacement.

[0061] Based on this, the brewing cylinder 100 further includes a connecting cylinder 140 for sleeving with the driving member 210. The connecting cylinder 140 is located on the lateral side of the outer cylinder 120 and is connected to the outer cylinder 120 through a connecting rib 150. The connecting cylinder 140 can specifically be sleeved on the outside of the guiding member 220. Specifically, the guiding member 220 is respectively convexly provided with a stop protrusion at the upper and lower ends of the connecting cylinder 140, so that the connecting cylinder 140 can be driven to rotate around the driving member 210 but will not perform vertical displacement relative to the driving member 210. That is, the brewing cylinder 100 can be driven to rotate around the driving member 210 but will not perform vertical displacement relative to the driving member 210.

[0062] The linkage vertical rod 240 is arranged side by side and spaced apart from the driving member 210, and the two are connected by a linkage cross rod 250. The linkage vertical rod 240 is connected to the lower piston member 300. In this way, when the brewing cylinder 100 is stopped by the stop protrusion and will not perform vertical displacement relative to the driving member 210, the driving member 210 drives the lower piston member 300 to perform vertical displacement, achieving the purpose of the vertical displacement of the lower piston member 300 relative to the brewing cylinder 100.

[0063] The connecting cylinder 140, the connecting rib 150 and the outer cylinder 120 can be integrally formed. Of course, the connecting cylinder 140, the connecting rib 150 and the outer cylinder 120 can also be detachably or non-detachably connected after being separately formed.

[0064] When the brewing cylinder 100 includes the connecting cylinder 140 and the connecting rib 150, the above-mentioned limiting hole 121 can be provided on the outer cylinder 120 or at least partially opened on the connecting rib 150 without limitation.

[0065] In addition, as described above, the outer peripheral side wall of the inner cylinder body 110 extends in a stepped shape along its own length direction to form a first cylinder body section 111 with a larger outer diameter and a second cylinder body section 112 with a smaller outer diameter. When the outer cylinder body 120 is sleeved at the second cylinder body section 112 and abuts against the first cylinder body section 111, the connecting cylinder 140 and / or the connecting rib 150 extend along their own length directions to exceed the second cylinder body section 112 or the first cylinder body section 111, and the exceeding part has an assembly surface 141 facing the first cylinder body section 111. The shape of the assembly surface 141 is adapted to the shape of the side surface at the position where the first cylinder body section 111 is located. When the connecting cylinder 140 and / or the connecting rib 150 extend along their own length directions to exceed the second cylinder body section 112 or the first cylinder body section 111, it is helpful to form the above-mentioned assembly surface 141. And the assembly surface 141 can form structural support and structural protection for the first cylinder body section 111 of the inner cylinder body 110 laterally. The shape adaptation of the assembly surface 141 ensures that there is no moving interference between the assembly surface 141 and the first cylinder body section 111, and no useless structural gap is formed.

[0066] Specifically, as Figures 1 to 2 shown, the length of the connecting rib 150 is approximately the same as that of the outer cylinder body 120, that is, approximately the same as that of the second cylinder body section 112. The connecting cylinder 140 extends to exceed the first cylinder body section 111, and the side of the connecting cylinder 140 facing the inner cylinder body 110 protrudes, and an assembly surface 141 is formed at the protruding part.

[0067] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A brewing cylinder, characterized in that, It includes an inner cylinder body and an outer cylinder body that are at least partially sleeved inside and outside each other, where the outer cylinder body covers all the outer peripheral side walls of the inner cylinder body, or the outer cylinder body covers a partial outer peripheral side wall of the inner cylinder body; Among them, the material hardness of the inner cylinder body is greater than that of the outer cylinder body.

2. The brewing cylinder according to claim 1, wherein Both the inner cylinder body and the outer cylinder body are made of metal materials; or, The inner cylinder body is made of ceramic materials.

3. The brewing cylinder according to claim 1, characterized in that, The machining accuracy of the inner cylinder body is not lower than that of the outer cylinder body; and / or, The cross-sectional shape of the inner cylinder body is circular.

4. The brewing cylinder according to claim 1, characterized in that, The outer peripheral side wall of the inner cylinder body extends in a stepped shape along its own length direction to form a first cylinder body section with a larger outer diameter and a second cylinder body section with a smaller outer diameter; The outer cylinder body is sleeved at the second cylinder body section, and the end wall of the outer cylinder body abuts against the end wall of the first cylinder body section.

5. The brewing cylinder according to claim 1, characterized in that, An annular groove is provided in a circumferential direction on the outer peripheral side wall of the inner cylinder body, and a limiting hole is provided radially through the outer cylinder body at a position corresponding to the annular groove, and the limiting hole communicates with the annular groove; The brewing cylinder further includes a limiting member, and the limiting member is inserted through the communication portion between the limiting hole and the annular groove.

6. The brewing cylinder according to claim 1, characterized in that, The brewing cylinder further includes a connecting cylinder body, which is used to be sleeved with a driving member. The connecting cylinder body is located on the lateral side of the outer cylinder body and is connected to the outer cylinder body through a connecting rib.

7. The brewing cylinder according to claim 6, wherein, The connecting cylinder body, the connecting rib and the outer cylinder body are integrally formed.

8. The brewing cylinder according to claim 6, characterized in that, The outer peripheral side wall of the inner cylinder body extends in a stepped shape along its own length direction to form a first cylinder body section with a larger outer diameter and a second cylinder body section with a smaller outer diameter. The outer cylinder body is sleeved at the second cylinder body section and abuts against the first cylinder body section; Among them, the connecting cylinder body and / or the connecting rib extend along their own length directions to exceed the second cylinder body section or the first cylinder body section, and the exceeding part has an assembly surface facing the first cylinder body section, and the shape of the assembly surface is adapted to the shape of the side surface at the position where the first cylinder body section is located.

9. A brewing module, characterized in that, It includes: The brewing cylinder according to any one of claims 1 to 5, and the brewing cylinder is movably arranged to have a powder receiving position and a brewing position; And, A driving mechanism, which is drivingly connected to the brewing cylinder.

10. A brewing module, characterized in that, It includes: The brewing cylinder according to any one of claims 6 to 8, and the brewing cylinder is movably arranged to have a powder receiving position and a brewing position; And, A driving mechanism, including a movably arranged driving member; Among them, the connecting cylinder body is sleeved on the outside of the driving member, and the connecting cylinder body is rotatably arranged relative to the driving member to drive the inner cylinder body and the outer cylinder body to rotate around the driving member to the powder receiving position and the brewing position.

11. A beverage cooking device, characterized in that, It includes the brewing module according to claim 9 or 10.