Coffee extraction cavity and coffee machine

Abstract

The utility model provides a coffee extraction cavity and a coffee machine, and relates to the technical field of coffee machines, the coffee extraction cavity comprises an upper cavity body and a lower cavity body which are matched with each other, the upper cavity body is provided with a water inlet, and the lower cavity body is provided with a water outlet; the upper cavity comprises an outer shell and an inner sealing part, the outer shell is of a cavity structure with an opening in the bottom, the inner sealing part is arranged in the outer shell, and the inner side face of the outer shell and the outer side face of the inner sealing part are arranged at intervals to form matching grooves with openings in the bottoms; the first inner matching surface and the first top matching surface are located on the outer side face of the inner sealing part, and the first outer matching surface is located on the inner side face of the outer shell. The lower cavity is of a cavity structure with an opening in the top, and the top of the lower cavity is provided with a matching part matched with the matching groove; and the sealing piece is arranged on the first inner matching surface or the first top matching surface. The coffee extraction cavity and the coffee machine have the advantage of being good in sealing performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coffee machines, in particular to a coffee extraction cavity and a coffee machine. BACKGROUND

[0002] The coffee extraction cavity is a component used to place coffee powder in the coffee machine, and then coffee extraction is realized under the impact of water flow with a certain pressure. Since the coffee extraction cavity needs to complete the extraction of coffee, it needs to be impacted by water flow with a certain pressure, and therefore has a high requirement for its sealing performance.

[0003] However, in the prior art, the end face sealing method is generally used, and the end face sealing needs to be under a certain pressure to achieve a better sealing effect. Generally, a relatively large pressing force is needed, and the prior art generally sets a long handle to increase the torque. However, this increases the size of the entire coffee machine, which is not conducive to product miniaturization. Meanwhile, during the installation of the coffee extraction cavity, the coffee powder needs to be compacted by a press hammer first, which increases the user operation steps.

[0004] In view of the above problems, the present application provides a new technical solution. Practical new type content

[0005] The present application aims to provide a coffee extraction cavity and a coffee machine, which have the advantages of good sealing performance.

[0006] In a first aspect, the present application provides a coffee extraction cavity, and the technical solution is as follows:

[0007] The coffee extraction cavity comprises an upper cavity and a lower cavity which cooperate with each other, the upper cavity is provided with a water inlet, and the lower cavity is provided with a water outlet;

[0008] The upper cavity comprises an outer shell and an inner sealing part, the outer shell is a cavity structure with an open bottom, the inner sealing part is arranged inside the outer shell, and the inner side surface of the outer shell and the outer side surface of the inner sealing part are arranged in a spaced manner to form a cooperating groove with an open bottom, the cooperating groove comprises a first inner cooperating surface, a first top cooperating surface and a first outer cooperating surface which are sequentially connected and located at the outer side surface of the inner sealing part and the inner side surface of the outer shell, respectively;

[0009] The lower cavity is a cavity structure with an open top, and the top is provided with a cooperating part which cooperates with the cooperating groove;

[0010] A sealing element is arranged on the first inner cooperating surface or the first top cooperating surface.

[0011] The upper cavity is arranged as a structure comprising an outer shell and an inner sealing part, a rear matching groove is formed between the outer shell and the inner sealing part, and the upper cavity can be buckled on the lower cavity through the cooperation of the matching groove and the matching part of the lower cavity, so that the sealing effect can be improved. In addition, the matching groove comprises a first inner matching surface, a first top matching surface and a first outer matching surface, and the sealing element is arranged on the first inner matching surface or the first top matching surface, so that sealing can be realized at a position close to the lower cavity. Since the sealing element is closer to the lower cavity, hot water is often used during coffee extraction, and the temperature of the hot water is high. Under the action of heat conduction, the temperature of the sealing element rises, and the sealing element expands to a certain extent under the action of thermal expansion and cold contraction, thereby improving the sealing effect. Therefore, the scheme has the beneficial effect of good sealing performance.

[0012] Further, in the present application, the matching part comprises a second inner matching surface located on the inner side surface of the lower cavity, a second top matching surface located on the top of the lower cavity and a second outer matching surface located on the outer side surface of the lower cavity, which are sequentially connected;

[0013] The second inner matching surface corresponds to the first inner matching surface;

[0014] The second top matching surface corresponds to the first top matching surface;

[0015] The second outer matching surface corresponds to the first outer matching surface.

[0016] Further, in the present application, the first inner matching surface is provided with a horizontal inwardly recessed groove, and the sealing element is arranged in the groove and protrudes from the first inner matching surface.

[0017] Further, in the present application, the inner side surface of the outer shell is provided with a first buckle and a second buckle with a horizontal height difference, a first opening is arranged between the first buckle and the second buckle, the first opening penetrates the bottom surface of the outer shell, the first buckle is provided with a first inclined surface inclined downward toward the first opening on the side close to the first opening, and the second buckle is provided with a second inclined surface inclined upward toward the first opening on the side close to the first opening;

[0018] The outer surface of the lower cavity is provided with a third buckle for clamping with the first buckle from the first opening.

[0019] Further, in the present application, the bottom surface of the first buckle is flush with the bottom surface of the outer shell, the top surface of the first buckle is connected with the first inclined surface, the distance between the top surface and the bottom surface of the first buckle is H2, the height dimension of the second inclined surface of the second buckle is H3, and the distance from the center of the sealing element in the matched state to the second top matching surface is H1.

[0020] The H2 is greater than the H1.

[0021] The H3 is greater than the H1.

[0022] Further, in the present application, the sealing member is arranged on the first top mating surface, and one side of the sealing member 300 is in contact with the first inner mating surface 141, and / or the other side is in contact with the first outer mating surface 143.

[0023] The inner side surface of the outer shell is provided with a first threaded structure, the outer side surface of the lower cavity is provided with a second threaded structure matched with the first threaded structure, and the outer side surface of the lower cavity is further provided with a horizontally outwardly extending boss, which is arranged at one end of the second threaded structure away from the top surface of the lower cavity.

[0024] Further, in the present application, the bottom of the inner sealing part is provided with a pressing part, the distance from the bottom of the pressing part to the bottom of the sealing member is H4, the height of the lower cavity filled with coffee powder is H5, and the height of the coffee powder compacted in the matched state is H6.

[0025] The H4 is equal to the H5 minus the H6.

[0026] In a second aspect, the present application further provides a coffee machine, which is provided with the coffee extraction cavity described above.

[0027] Further, in the present application, the coffee machine comprises an upper machine body and a lower machine body, and the upper machine body and the lower machine body are rotationally connected.

[0028] The coffee extraction cavity is arranged at one side of the bottom of the upper machine body, the other side of the upper machine body is provided with a first rotating assembly, and the coffee extraction cavity and the first rotating assembly are arranged side by side.

[0029] One side of the top of the lower machine body is provided with a second rotating assembly rotationally matched with the first rotating assembly, and the inside of the lower machine body is provided with at least a heating assembly and a water pump, and the top of the lower machine body is provided with a first covering part corresponding to the position of the coffee extraction cavity, so as to realize mutual covering in the storage state.

[0030] Further, in the present application, the first rotating assembly and the second rotating assembly are rotationally matched with each other in a nested manner, and the first rotating part or the second rotating part is provided with a connecting hole communicating the upper machine body and the lower machine body.

[0031] The capacity of the coffee extraction cavity is 30ml-160ml, and the extraction pressure is 3bar-20bar.

[0032] From the above, the coffee extraction cavity and the coffee machine provided by the application set the upper cavity body into a structure including an outer shell and an inner sealing part, form a rear matching groove between the outer shell and the inner sealing part, and match the upper cavity body with the lower cavity body through the matching groove and the matching part of the lower cavity body, so that the upper cavity body can be buckled on the lower cavity body, and the sealing effect can be improved. In addition, the matching groove includes a first inner matching surface, a first top matching surface and a first outer matching surface, and the sealing element is arranged on the first inner matching surface or the first top matching surface, so that the sealing can be realized at the position close to the lower cavity body. Since the sealing element is closer to the lower cavity body, hot water is often used during coffee extraction, and the temperature of the hot water is high. Under the action of heat conduction, the temperature of the sealing element rises, and after the temperature of the sealing element rises, the sealing element will expand to a certain extent under the action of thermal expansion and cold contraction, and then the sealing effect is improved. Therefore, the scheme provided by the application has the beneficial effect of good sealing performance. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The structure schematic diagram of the upper cavity body and the lower cavity body of the coffee extraction cavity provided by the application.

[0034] Figure 2 The structure schematic diagram of the lower cavity body of the coffee extraction cavity provided by the application.

[0035] Figure 3 The structure schematic diagram of the upper cavity body of the coffee extraction cavity provided by the application.

[0036] Figure 4 The structure schematic diagram of the upper cavity body and the lower cavity body of the coffee extraction cavity provided by the application.

[0037] Figure 5 The structure schematic diagram of the upper cavity body of the coffee extraction cavity provided by the application.

[0038] Figure 6 The structure schematic diagram of the coffee extraction cavity in the matching state provided by the application.

[0039] Figure 7 The structure schematic diagram of the upper cavity body and the lower cavity body of another coffee extraction cavity provided by the application.

[0040] Figure 8 The schematic diagram of the lower cavity body filled with coffee powder provided by the application.

[0041] Figure 9 The schematic diagram of the upper cavity body and the lower cavity body in the matching state provided by the application.

[0042] Figure 10 The structure schematic diagram of the coffee machine provided by the application.

[0043] In the figure: 100, upper cavity; 200, lower cavity; 300, sealing element; 400, upper body; 500, lower body; 600, heating assembly; 700, water pump; 800, connecting hole; 110, water inlet; 120, outer shell; 130, inner sealing part; 140, matching groove; 150, first buckle; 160, second buckle; 170, first opening; 180, first threaded structure; 190, pressing part; 210, water outlet; 220, matching part; 230, third buckle; 240, second threaded structure; 250, boss; 410, first rotating assembly; 510, second rotating assembly; 520, first covering part; 141, first inner matching surface; 142, first top matching surface; 143, first outer matching surface; 144, groove; 151, first inclined surface; 161, second inclined surface; 221, second inner matching surface; 222, second top matching surface; 223, second outer matching surface. DETAILED DESCRIPTION

[0044] The technical solutions in the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0045] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0046] Please refer to Figures 1 to 10 The present application provides a coffee extraction cavity, and the technical solutions are as follows:

[0047] The coffee extraction cavity comprises an upper cavity 100 and a lower cavity 200 matched with each other, the upper cavity 100 is provided with a water inlet 110, and the lower cavity 200 is provided with a water outlet 210;

[0048] The upper cavity 100 comprises an outer shell 120 and an inner sealing part 130, the outer shell 120 is a bottom-open cavity structure, the inner sealing part 130 is arranged inside the outer shell 120, and the inner side of the outer shell 120 and the outer side of the inner sealing part 130 are arranged in a spaced manner to form a bottom-open matching groove 140, the matching groove 140 comprises a first inner matching surface 141, a first top matching surface 142 and a first outer matching surface 143 arranged in sequence;

[0049] The lower cavity 200 is a top-open cavity structure, and the top is provided with a matching part 220 matched with the matching groove 140.

[0050] The sealing member 300 is arranged on the first inner matching surface 141 or the first top matching surface 142.

[0051] The lower cavity 200 is mainly used for placing coffee powder, and then performing coffee extraction, and the extracted coffee flows out from the water outlet 210.

[0052] The upper cavity 100 is mainly used for covering the lower cavity 200 to ensure normal extraction of coffee. Generally, the water inlet 110 is connected with a water pump 700 of the coffee machine, the water pump 700 pumps hot water to the water inlet 110 at a certain pressure, and then the hot water flowing into the water inlet 110 impacts the coffee powder to perform extraction.

[0053] The matching groove 140 formed between the outer shell 120 and the inner sealing part 130 is used for matching with the matching part 220 of the lower cavity 200, so that the upper cavity 100 can be clamped on the lower cavity 200, and the stability and sealing performance can be improved.

[0054] The outer shell 120 and the inner sealing part 130 can adopt a cylindrical structure, so that the matching groove 140 is in a circular ring shape.

[0055] The first top matching surface 142 can be the inner side of the top of the outer shell 120.

[0056] The sealing member 300 can be a rubber sealing ring.

[0057] Through the above scheme, the upper cavity 100 is configured to include an outer shell 120 and an inner sealing portion 130. A rear mating groove 140 is formed between the outer shell 120 and the inner sealing portion 130. The upper cavity 100 can be fastened to the lower cavity 200 through the mating groove 140 and the mating portion 220 of the lower cavity 200, thereby improving the sealing effect. In addition, the mating groove 140 includes a first inner mating surface 141, a first top mating surface 142, and a first outer mating surface 143. The sealing element 300 is disposed in the first inner... The mating surface 141 or the first top mating surface 142 can achieve a radial seal near the lower cavity 200. Since the sealing element 300 is closer to the lower cavity 200, and hot water is often used when extracting coffee, the temperature of the hot water is high. Under the action of heat conduction, the temperature of the sealing element 300 will rise. After the temperature rises, the sealing element 300 will expand to a certain extent due to thermal expansion and contraction, thereby improving the sealing effect. Therefore, the solution proposed in this application has the beneficial effect of good sealing performance.

[0058] Specifically, refer to Figure 2 The mating part 220 includes a second inner mating surface 221 located on the inner side of the lower cavity 200, a second top mating surface 222 located on the top of the lower cavity 200, and a second outer mating surface 223 located on the outer side of the lower cavity 200, which are connected in sequence.

[0059] The second inner mating surface 221 mates with the first inner mating surface 141.

[0060] The second mating surface 222 mates with the first mating surface 142.

[0061] The second outer mating surface 223 mates with the first outer mating surface 143.

[0062] Furthermore, referring to Figure 3 In some embodiments, the first inner mating surface 141 has a horizontally inwardly recessed groove 144, and the sealing element 300 is disposed within the groove 144 and protrudes from the first inner mating surface 141. By placing the sealing element 300 on the first inner mating surface 141, sealing is achieved in the radial direction through the sealing element 300, without applying excessive pressure to the upper cavity 100. While ensuring the sealing effect, there is no need to set up an additional handle structure, which is conducive to the miniaturization design of the product.

[0063] Furthermore, referring to Figure 4 and Figure 5In some embodiments, the inner side of the outer casing 120 is provided with a first buckle 150 and a second buckle 160 having a horizontal height difference. A first opening 170 is provided between the first buckle 150 and the second buckle 160. The first opening 170 penetrates the bottom surface of the outer casing 120. The first buckle 150 is provided with a first inclined surface 151 that slopes downward toward the first opening 170 on the side near the first opening 170. The second buckle 160 is provided with a second inclined surface 161 that slopes upward toward the first opening 170 on the side near the first opening 170.

[0064] The outer surface of the lower cavity 200 is provided with a third buckle 230 for engaging with the first buckle 150 from the first opening 170.

[0065] In practical use, the first opening 170 is aligned with the third latch 230, and then the upper cavity 100 and the lower cavity 200 are rotated relative to each other. During the rotation, the upper cavity 100, together with the first latch 150, comes into contact with the third latch 230. Since the first latch 150 is provided with the first inclined surface 151, the third latch 230 is automatically lifted along with the first inclined surface 151, thereby fastening and locking the upper cavity 100 and the lower cavity 200. When it is necessary to disengage, the third latch 230 is automatically disengaged along the second inclined surface 161 by rotating in the opposite direction, thereby disengaging the upper cavity 100 and the lower cavity 200.

[0066] Preferably, in some embodiments, the bottom surface of the first buckle 150 is flush with the bottom surface of the outer shell 120, the top surface of the first buckle 150 is connected to the first inclined surface 151, the distance between the top surface and the bottom surface of the first buckle 150 is H2, the height dimension of the second inclined surface 161 of the second buckle 160 is H3, and the distance from the center of the sealing member 300 in the mating state to the second top mating surface 222 is H1;

[0067] H2 > H1;

[0068] H3 > H1.

[0069] Setting H2 > H1 and H3 > H1 ensures that the upper cavity 100 and the lower cavity 200 fit together, maintaining good sealing.

[0070] In addition, refer to Figure 7 In some other embodiments, the seal 300 is disposed on the first top mating surface 142, and one side of the seal 300 contacts the first inner mating surface 141 and / or the other side contacts the first outer mating surface 143.

[0071] The inner side of the outer shell 120 is provided with a first threaded structure 180, the outer side of the lower cavity 200 is provided with a second threaded structure 240 that mates with the first threaded structure 180, and the outer side of the lower cavity 200 is also provided with a horizontally outwardly extending boss 250, which is located at the end of the second threaded structure 240 away from the top surface of the lower cavity 200.

[0072] The sealing element 300 is disposed on the first top mating surface 142. The side of the sealing element 300 near the first inner mating surface 141 can contact and engage with the first inner mating surface 141, and the side of the sealing element 300 near the first outer mating surface 143 can contact and engage with the first outer mating surface 143. The two sides of the sealing element 300 can contact and engage with the first inner mating surface 141 and the first outer mating surface 143 simultaneously, or only one side can contact and engage with either the first inner mating surface 141 or the first outer mating surface 143.

[0073] In practical use, the upper cavity 100 and the lower cavity 200 can be locked together by the first threaded structure 180 and the second threaded structure 240. During this process, the first top mating surface 142 and the second top mating surface 222 approach each other and, during this approach, they press against the sealing element 300 set on the first top mating surface 142. The sealing element 300 contacts the first inner mating surface 141 and the first outer mating surface 143. When it is fixed itself, it is covered by the second top mating surface 222 when it is pressed against the first top mating surface 142 and the second top mating surface 222, thereby preventing water from overflowing and providing excellent sealing performance.

[0074] Furthermore, referring to Figure 8 and Figure 9 In some embodiments, the bottom of the inner sealing part 130 is provided with a pressing part 190, the distance from the bottom of the pressing part 190 to the bottom of the sealing member 300 is H4, the height of the lower cavity 200 filled with coffee powder is H5, and the height of the coffee powder compacted in the mating state is H6.

[0075] H4 = H5 - H6.

[0076] A pressing part 190 is provided at the bottom of the inner sealing part 130, so that the coffee powder can be compacted by pressing part 190 during the process of the upper cavity 100 and the lower cavity 200 cooperating.

[0077] Secondly, referring to Figure 10 This application also provides a coffee machine having the aforementioned coffee extraction chamber.

[0078] Specifically, the coffee machine includes an upper body 400 and a lower body 500, which are rotatably connected.

[0079] The coffee extraction chamber is located on one side of the bottom of the upper body 400, and the first rotating component 410 is located on the other side of the upper body 400. The coffee extraction chamber and the first rotating component 410 are arranged side by side.

[0080] The lower body 500 has a second rotating component 510 on one side of its top, which rotates and cooperates with the first rotating component 410. The lower body 500 has at least a heating component 600 and a water pump 700 inside. The lower body 500 has a first covering part 520 on its top, which corresponds to the position of the coffee extraction chamber, so that they cover each other when stored.

[0081] The main body of the coffee machine is divided into an upper body 400 and a lower body 500, which are rotatably connected by the rotation of a first rotating component 410 and a second rotating component 510. The coffee extraction chamber is positioned parallel to the first rotating component 410 on the upper body 400. When brewing coffee, the upper body 400 can be rotated to move the extraction component, which was originally stored in the lower body 500, to one side and become suspended. At this time, a container of the same height as the lower body 500 can be placed below the coffee extraction chamber to hold the coffee extracted by the extraction chamber. Furthermore, a first covering part 520 is provided on the lower body 500, corresponding to the position of the coffee extraction chamber, to cover each other in the stored state. This prevents dust and other debris from falling into the coffee extraction chamber and also prevents dust and other debris from falling into the lower body 500, providing excellent safety protection.

[0082] Furthermore, in some embodiments, the first rotating component 410 and the second rotating component 510 are nested and rotated together, and the first rotating part or the second rotating part is provided with a connecting hole 800 that connects the upper body 400 and the lower body 500.

[0083] The coffee extraction chamber has a capacity of 30ml-160ml and an extraction pressure of 3bar-20bar.

[0084] A connection hole 800 is provided on the first rotating assembly 410 or the second rotating assembly 510 to connect the upper body 400 and the lower body 500. By providing the connection hole 800, the water pump 700 of the lower body 500 can be connected to the coffee extraction chamber through a pipe. That is, the pipe passes through the connection hole 800 and connects the water pump 700 and the coffee extraction chamber. At the same time, the wires of some electrical appliances of the upper body 400 can also be introduced to the power supply of the lower body 500 through the connection hole 800. That is, the connection hole 800 can serve as a place for pipes and wires, thus having the advantage of high safety.

[0085] The solution of this application sets the upper body 400 and the lower body 500 as a rotatable connection, and the extraction component is set in the upper body 400. In actual use, the upper body 400 is rotated so that the coffee extraction chamber is in a cantilever state. Therefore, when using a cup to receive the extracted coffee, the height of the cup can be the same as that of the lower body 500, and its receiving capacity can reach 30ml-160ml, which far exceeds that of ordinary portable small coffee machines. Therefore, by adopting the solution of this application, the capacity of the coffee extraction chamber can be set to 30ml-160ml, and the extraction pressure can be 3bar-20bar, thereby meeting the different needs of espresso and Americano.

[0086] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A coffee extraction chamber, comprising an upper chamber (100) and a lower chamber (200) that cooperate with each other, wherein the upper chamber (100) is provided with a water inlet (110) and the lower chamber (200) is provided with a water outlet (210), characterized in that: The upper cavity (100) includes an outer shell (120) and an inner sealing part (130). The outer shell (120) is a cavity structure with a bottom opening. The inner sealing part (130) is disposed inside the outer shell (120). The inner side of the outer shell (120) and the outer side of the inner sealing part (130) are provided with a bottom opening mating groove (140) at intervals. The mating groove (140) includes a first inner mating surface (141) and a first top mating surface (142) located on the outer side of the inner sealing part (130) and a first outer mating surface (143) located on the inner side of the outer shell (120) connected in sequence. The lower cavity (200) is a cavity structure with an open top, and a mating part (220) is provided at the top to mate with the mating groove (140); A seal (300) is disposed on the first inner mating surface (141) or the first top mating surface (142).

2. The coffee extraction chamber according to claim 1, characterized in that, The mating part (220) includes a second inner mating surface (221) located on the inner side of the lower cavity (200), a second top mating surface (222) located on the top of the lower cavity (200), and a second outer mating surface (223) located on the outer side of the lower cavity (200) connected in sequence; The second inner mating surface (221) mates with the first inner mating surface (141); The second top mating surface (222) mates with the first top mating surface (142); The second outer mating surface (223) mates with the first outer mating surface (143).

3. The coffee extraction chamber according to claim 2, characterized in that, The first inner mating surface (141) has a horizontally recessed groove (144), and the sealing element (300) is disposed in the groove (144) and protrudes from the first inner mating surface (141).

4. A coffee extraction chamber according to claim 3, characterized in that, The inner side of the outer shell (120) is provided with a first buckle (150) and a second buckle (160) having a horizontal height difference. A first opening (170) is provided between the first buckle (150) and the second buckle (160). The first opening (170) penetrates the bottom surface of the outer shell (120). The first buckle (150) has a first inclined surface (151) that slopes downward toward the first opening (170) on the side near the first opening (170). The second buckle (160) has a second inclined surface (161) that slopes upward toward the first opening (170) on the side near the first opening (170). The outer surface of the lower cavity (200) is provided with a third buckle (230) for engaging with the first buckle (150) from the first opening (170).

5. A coffee extraction chamber according to claim 4, characterized in that, The bottom surface of the first buckle (150) is flush with the bottom surface of the outer shell (120), the top surface of the first buckle (150) is connected to the first inclined surface (151), the distance between the top surface and the bottom surface of the first buckle (150) is H2, the height dimension of the second inclined surface (161) of the second buckle (160) is H3, and the distance from the center of the seal (300) to the second top mating surface (222) in the mating state is H1; H2 > H1; H3 > H1.

6. A coffee extraction chamber according to claim 2, characterized in that, The sealing element (300) is disposed on the first top mating surface (142), and one side of the sealing element (300) is in contact with the first inner mating surface (141), and / or the other side is in contact with the first outer mating surface (143); The inner side of the outer shell (120) is provided with a first threaded structure (180), and the outer side of the lower cavity (200) is provided with a second threaded structure (240) that mates with the first threaded structure (180). The outer side of the lower cavity (200) is also provided with a horizontally outwardly extending boss (250), which is located at one end of the second threaded structure (240) away from the top surface of the lower cavity (200).

7. A coffee extraction chamber according to claim 6, characterized in that, The bottom of the inner sealing part (130) is provided with a pressing part (190), the distance from the bottom of the pressing part (190) to the bottom of the sealing member (300) is H4, the height of the lower cavity (200) filled with coffee powder is H5, and the height of the coffee powder compacted in the mating state is H6. H4 = H5 - H6.

8. A coffee machine, characterized in that, The coffee machine is provided with a coffee extraction chamber as described in any one of claims 1 to 7.

9. A coffee machine according to claim 8, characterized in that, The coffee machine includes an upper body (400) and a lower body (500), which are rotatably connected. The coffee extraction chamber is located on one side of the bottom of the upper body (400), and a first rotating component (410) is provided on the other side of the upper body (400). The coffee extraction chamber and the first rotating component (410) are arranged side by side. The lower body (500) has a second rotating component (510) on one side of its top that rotates in conjunction with the first rotating component (410). The lower body (500) has at least a heating component (600) and a water pump (700) inside. The top of the lower body (500) has a first covering part (520) that corresponds to the position of the coffee extraction chamber, so that they cover each other when stored.

10. A coffee machine according to claim 9, characterized in that, The first rotating component (410) and the second rotating component (510) are nested and rotated together, and the first rotating component or the second rotating component is provided with a connecting hole (800) connecting the upper body (400) and the lower body (500); The coffee extraction chamber has a capacity of 30ml-160ml and an extraction pressure of 3bar-20bar.

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