Portable coffee machine

Abstract

The utility model relates to a portable coffee machine which comprises a shell assembly, a water tank, a water pump, an extraction assembly and a pressure detection piece, and the shell assembly is provided with a first through hole; the water tank is installed in the shell assembly. The water pump is installed in the shell assembly, the water pump is provided with a water inlet end and a water outlet end, and the water tank is communicated with the water inlet end of the water pump; the extraction assembly is mounted in the shell assembly, and the extraction assembly is communicated with the water outlet end of the water pump; the pressure detection piece is installed in the first through hole, the pressure detection piece is provided with a detection end, the detection end is communicated with the extraction assembly, and the pressure detection piece is used for detecting and displaying the pressure in the extraction assembly. According to the portable coffee machine, the pressure in the extraction cavity is detected through the detection end, so that the pressure in the extraction cavity is displayed through the pressure detection, a user can conveniently know the pressure in the extraction cavity, and then the user can conveniently adjust coffee extraction conditions according to self requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to coffee machine technical field, in particular to a portable coffee machine. BACKGROUND

[0002] The taste of coffee liquid is related to extraction pressure, in the related art, the portable coffee machine has only switch and working indicator light on the machine body, does not have the function of showing extraction pressure, leads to user not knowing the pressure when the coffee machine extracts, so when the taste of extracted coffee liquid does not meet the user's expectation, the user can only adjust according to feeling. SUMMARY

[0003] The utility model discloses a portable coffee machine, and aims at solving the technical problem that user cannot know the extraction pressure of the portable coffee machine in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model provides a portable coffee machine, the portable coffee machine includes shell assembly, water tank, water pump, extraction assembly and pressure detection piece, shell assembly is equipped with first through -hole, water tank is installed in the shell assembly, water pump is installed in the shell assembly, the water pump has water inlet end and water outlet end, the water tank is linked with the water inlet end of the water pump, extraction assembly is installed in the shell assembly, the extraction assembly is linked with the water outlet end of the water pump, pressure detection piece is installed in the first through -hole, the pressure detection piece has detection end, the detection end is linked with the extraction assembly, and the pressure detection piece is used to detect and show the pressure in the extraction assembly, wherein, the pressure detection piece has the unlocking position and the locking position, the pressure detection piece can rotate relative to the first through -hole to switch the unlocking position and the locking position, when the pressure detection piece is in the unlocking position, the pressure detection piece is movably connected in the first through -hole, when the pressure detection piece is in the locking position, the pressure detection piece is relatively fixed with the first through -hole in the axial direction of the first through -hole.

[0005] Optionally, the shell assembly is provided with a sliding groove in communication with the first through -hole, and a first clamping portion is protruded on the outer wall of the pressure detection piece, the first clamping portion is slidably connected with the sliding groove, when the pressure detection piece is in the unlocking position, the first clamping portion can slide on the sliding groove, when the pressure detection piece is in the locking position, the first clamping portion is fixed relative to the sliding groove.

[0006] Optionally, the sliding groove includes a first groove segment extending along the axial direction of the first through -hole and a second groove segment extending along the circumferential direction of the first through -hole, and the first groove segment and the second groove segment are in communication.

[0007] Optionally, a groove is arranged on a side of the second slot segment away from the inside of the shell assembly, and a protrusion is arranged on a side of the first clamping part away from the inside of the shell assembly, the protrusion and the groove are clamped when the pressure detection piece is in the locking position.

[0008] Optionally, the shell assembly comprises a locking plate connected to the first through hole, the locking plate is provided with a second through hole in communication with the first through hole, a second clamping part is arranged on a side of the pressure detection piece facing the locking plate, the second clamping part is arranged through the second through hole, the second clamping part can pass through the second through hole when the pressure detection piece is in the unlocking position, and the second clamping part is in abutment with a side of the locking plate facing the inside of the shell assembly when the pressure detection piece is in the locking position.

[0009] Optionally, the second clamping part comprises a connecting segment and a limiting segment connected to each other, the connecting segment is connected to the pressure detection piece, and the connecting segment is arranged through the second through hole, the limiting segment can pass through the second through hole when the pressure detection piece is in the unlocking position, and the limiting segment is in abutment with a side of the locking plate facing the inside of the shell assembly when the pressure detection piece is in the locking position.

[0010] Optionally, the second through hole is in the same shape as the limiting segment.

[0011] Optionally, the limiting segment is arranged in an arc shape, and the width of the limiting segment gradually increases from the connecting segment to the free end.

[0012] Optionally, a sealing ring is arranged between the pressure detection piece and the first through hole.

[0013] Optionally, the extraction assembly comprises an extraction bottom cover, an extraction upper cover and an extraction chamber, the extraction upper cover is connected to the shell assembly, the extraction chamber is installed on the extraction bottom cover, and the extraction bottom cover and the extraction upper cover are detachably connected.

[0014] In the technical scheme of the utility model, the pressure detection piece is arranged through the first through hole, the pressure detection piece is arranged to be rotatable in the first through hole, and the pressure detection piece is arranged to be rotatable between the unlocking position and the locking position, so that the pressure detection piece can be switched from the unlocking position to the locking position by rotating the pressure detection piece after the pressure detection piece is arranged in the first through hole, the pressure detection piece is fixed in the first through hole in the axial direction of the first through hole when the pressure detection piece is in the locking position, and the installation of the pressure detection piece is completed. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic view of a portable coffee machine of an embodiment provided by the utility model;

[0016] Figure 2 is Figure 1 is an exploded view of the portable coffee machine in

[0017] Figure 3 is an enlarged view of A in Figure 2

[0018] Figure 4 is a structural schematic view of the main shell of the portable coffee machine in Figure 2

[0019] Figure 5 is a structural schematic view of the main shell of the portable coffee machine in another embodiment provided by the present application;

[0020] Figure 6 is a structural schematic view of the pressure detection member of the portable coffee machine in another embodiment provided by the present application. DETAILED DESCRIPTION

[0021] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be intervening components. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be intervening components. When a component is referred to as being "disposed" on another component, it can be directly on the other component or there can be intervening components. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are used for illustrative purposes only.

[0022] As Figures 1-2 ​​As shown, the utility model embodiment provides a kind of portable coffee machine 100, the portable coffee machine 100 including shell assembly 10, water tank 20, water pump 30, extraction component 40 and pressure detection piece 50, shell assembly 10 is equipped with first through-hole 111;Water tank 20 is installed in the shell assembly 10;Water pump 30 is installed in the shell assembly 10, the water pump 30 has water inlet end and water outlet end, the water tank 20 is communicated with the water inlet end of the water pump 30;Extraction component 40 is installed in shell assembly 10, the extraction component 40 is communicated with the water outlet end of the water pump 30;Pressure detection piece 50, installation in the first through-hole 111, the pressure detection piece 50 has detection end 54, the detection end 54 is communicated with the extraction component 40, the pressure detection piece 50 is used to detect and show the pressure in the extraction component 40, wherein, the pressure detection piece 50 has unlock position and locking position, the pressure detection piece 50 can be rotated relative to the first through-hole 111 to switch the unlock position and the locking position, when pressure detection piece 50 is in the unlock position, the pressure detection piece 50 is movably connected to the first through-hole 111, when pressure detection piece 50 is in the locking position, the pressure detection piece 50 is relatively fixed with the first through-hole 111 in the axial direction of the first through-hole 111.

[0023] In the embodiment, shell assembly 10 is used to accommodate water tank 20, water pump 30, extraction component 40 and pressure detection piece 50 and provide support;Water tank 20 is used to store the water required for coffee extraction;Water tank 20 and the water inlet end of water pump 30 are communicated by pipeline (not shown in figure), and water pump 30 is used to send the water stored in water tank 20 to extraction component 40;Extraction component 40 and the water outlet end of water pump 30 are communicated by pipeline (not shown in figure), and extraction component 40 is used to accommodate coffee powder or coffee capsule, which is the place for extracting coffee liquid, and extraction component 40 is provided with liquid outlet for coffee liquid to flow out;When pressure detection piece 50 is installed in first through-hole 111, detection end 54 of pressure detection piece 50 is located in shell assembly 10, and is connected to extraction component 40 by pipeline (not shown in figure), and the part of pressure detection piece 50 for displaying pressure is located outside shell assembly 10.Pressure detection piece 50 can display the pressure in extraction component 40 by pointer or number.

[0024] It should be noted that the extraction of coffee is related to the speed of water flowing through the coffee powder, and the speed of water flowing through the coffee powder is related to the fineness of the coffee powder, the powder loading density, the water tank water volume and the like. The pressure in the extraction assembly 40 can reflect the fineness of the coffee powder, the powder loading density, the water tank water volume and the like in the extraction assembly 40 at the moment, for example, if the coffee powder is too thick, the water flow through the coffee powder during extraction will be too fast, resulting in insufficient coffee extraction. At this time, the pressure in the extraction assembly 40 will be low, and if the coffee powder is too fine, the water flow through the coffee machine during extraction will be too slow, resulting in excessive coffee extraction. At this time, the pressure in the extraction assembly 40 will be high.

[0025] In this embodiment, the pressure in the extraction chamber is detected by the detection end 54, so that the pressure detection shows the pressure in the extraction chamber, so that the user can know the pressure in the extraction chamber, and then the user can adjust the grinding degree of the coffee powder according to the user's own needs.

[0026] In this embodiment, during the installation of the pressure detection piece 50, when the pressure detection piece 50 is inserted into the first through hole 111, the pressure detection piece 50 is located at the unlocking position, at this time the pressure detection piece 50 can move or rotate in the axial direction of the first through hole 111, when the pressure detection piece 50 is rotated to switch to the locking position, at this time the pressure detection piece 50 can only rotate, and the pressure detection piece 50 cannot move in the axial direction of the first through hole 111, so that the pressure detection piece 50 is fixed in the axial direction of the first through hole 111. First through hole 111, complete the installation and fixation of the pressure detection piece 50; when it is necessary to disassemble the pressure detection piece 50, after rotating the pressure detection piece 50 from the locking position to the unlocking position, the pressure detection piece 50 can be disassembled from the first through hole 111.

[0027] As shown in FIG. 1, Figures 2-4 In an embodiment, the shell assembly 10 is provided with a chute 112 communicating with the first through hole 111, and the outer wall of the pressure detection piece 50 is provided with a first clamping portion 51, and the first clamping portion 51 is in sliding connection with the chute 112. When the pressure detection piece 50 is in the unlocking position, the first clamping portion 51 can slide on the chute 112, and when the pressure detection piece 50 is in the locking position, the first clamping portion 51 is fixed relative to the chute 112.

[0028] In this embodiment, the wall of the first through hole 111 is provided with a groove 112. One end of the groove 112 extends to the end of the first through hole 111 facing outwards from the housing assembly 10, and the other end of the groove 112 extends to the end of the first through hole 111 facing inwards from the housing assembly 10. The first snap-fit ​​portion 51 is provided at the end of the pressure sensing element 50 facing inwards from the housing assembly 10, so as to maximize the depth of the pressure sensing element 50 inserted into the first through hole 111, thereby reducing the portion of the pressure sensing element 50 exposed outside the housing assembly 10. It is understood that in other embodiments, the other end of the groove 112 may only extend to a certain point in the first through hole 111, that is, the groove 112 does not need to penetrate both ends of the first through hole 111, and the length of the groove 112 is related to the depth to which the pressure sensing element 50 needs to be inserted into the first through hole 111.

[0029] In this embodiment, the number of first engaging portions 51 and sliding grooves 112 is the same, both being two. The interval angle between the two sliding grooves 112 is 180°, and the interval angle between the two first engaging portions 51 is 180°. In other embodiments, the number of sliding grooves 112 may be more than the number of first engaging portions 51, and the number of first engaging portions 51 may be greater than or equal to three.

[0030] In this embodiment, the slide groove 112 includes a first groove segment 113 extending axially along the first through hole 111 and a second groove segment 114 extending circumferentially along the first through hole 111, the first groove segment 113 and the second groove segment 114 being connected. When the pressure detection element 50 is in the unlocked position, the first locking part 51 is slidably connected to the first groove segment 113, at which time the pressure detection element 50 can move back and forth along the axial direction of the first through hole 111. When the pressure detection element 50 is in the locked position, the first locking part 51 is slidably connected to the second groove segment 114, at which time the pressure detection element 50 can rotate circumferentially along the first through hole 111 and cannot slide along the axial direction of the first through hole 111, thereby achieving fixed installation of the pressure detection element 50 and the first through hole 111.

[0031] like Figure 3 and Figure 4 As shown, in one embodiment, the second groove segment 114 has a groove 115 on the side opposite to the interior of the housing assembly 10, and the first snap-fit ​​portion 51 has a protrusion 52 on the side opposite to the interior of the housing assembly 10. When the pressure detection element 50 is in the locked position, the protrusion 52 snaps into the groove 115.

[0032] In this embodiment, when the pressure detection element 50 is in the locked position, the first engaging portion 51 can slide in the second groove 114, meaning the pressure detection element 50 can rotate in the first through hole 111. To prevent the pressure detection element 50 from rotating to the unlocked position without human intervention, a protrusion 52 is engaged with a groove 115 to limit the rotational freedom of the pressure detection element 50 in the circumferential direction of the first through hole 111. It is understood that when an external force sufficient to overcome the resistance of the engagement between the protrusion 52 and the groove 115 is applied to the pressure detection element 50, such as when a person applies torque to the pressure detection element 50, the protrusion 52 will disengage from the groove 115, and the pressure detection element 50 can rotate to the unlocked position to remove the first through hole 111.

[0033] like Figure 2 As shown, in one embodiment, a sealing ring 80 is provided between the pressure detection element 50 and the first through hole 111.

[0034] In this embodiment, the inner ring wall of the sealing ring 80 abuts against the outer peripheral wall of the pressure detection element 50, and the outer ring wall of the sealing ring 80 abuts against the hole wall of the first through hole 111, so as to prevent liquid from entering the housing assembly 10 through the first through hole 111 and damaging the electronic components inside the housing assembly 10.

[0035] like Figure 2 As shown, in one embodiment, the extraction assembly 40 includes an extraction bottom cover 41, an extraction top cover 42, and an extraction chamber 43. The extraction top cover 42 is connected to the housing assembly 10, and the extraction chamber 43 is installed on the extraction bottom cover 41. The extraction bottom cover 41 and the extraction top cover 42 are detachably connected.

[0036] In this embodiment, the extraction cover 42 is fixed to the housing assembly 10. The extraction bottom cover 41 and the extraction top cover 42 are connected by threads to realize the disassembly and assembly of the extraction bottom cover 41 and the extraction top cover 42. When coffee needs to be extracted, the extraction bottom cover 41 is unscrewed, coffee powder or coffee capsules are put into the extraction chamber 43, and then the chamber body is installed onto the extraction top cover 42.

[0037] In this embodiment, the extraction assembly 40 is equipped with an exhaust valve (not shown in the figure). The exhaust valve can be located on the bottom cover 41 or the top cover 42 of the extraction assembly. The exhaust valve is a one-way valve, which only allows gas inside the extraction assembly 40 to be discharged and does not allow gas outside the extraction assembly 40 to enter. When the pressure inside the extraction assembly 40 reaches a certain value, the gas inside the extraction assembly 40 will push open the valve plate of the exhaust valve and be discharged outwards until the pressure inside the extraction assembly 40 is insufficient to push open the valve plate of the exhaust valve, at which point the valve plate will automatically close, thereby preventing damage to the extraction assembly 40 due to excessive pressure.

[0038] like Figure 2As shown, in one embodiment, the housing assembly 10 includes a main housing 11 and a bracket 12 disposed within the main housing 11. The main housing 11 is provided with a first through hole 111. The water tank 20 is fixed to the bracket 12. The water pump 30 is fixed to the bracket 12. The extraction assembly 40 is fixed to one end of the main housing 11 away from the water tank 20. The fixing member is connected to the main housing 11 or the bracket 12 to fix the pressure detection element 50 to the first through hole 111.

[0039] In this embodiment, the housing assembly 10 further includes a top cover 13 and a cup lid 14. The cup lid 14 is detachably installed at the end of the main housing 11 where the extraction assembly 40 is installed, and the cup lid 14 can be used to collect the coffee liquid flowing out of the extraction assembly 40. The top cover 13 is detachably installed at the end of the main housing 11 where the water tank 20 is installed, and the top cover 13 covers the water inlet of the water tank 20. When water needs to be added to the portable coffee machine 100, the top cover 13 is opened to fill the water inlet of the water tank 20. After filling, the top cover 13 is installed back onto the main housing 11.

[0040] In this embodiment, the portable coffee machine 100 also includes a circuit board 60 and a battery 70. The circuit board 60 is provided with electronic components and circuits required to perform the coffee extraction function, and the battery 70 is used to supply power to the circuit board 60, the water pump 30, and the pressure detection device 50. The bracket 12 includes an upper frame 121 and a lower frame 122 connected together. The water tank 20 is installed on the side of the upper frame 121 away from the lower frame 122. The water pump 30, the circuit board 60, and the battery 70 are all installed between the upper frame 121 and the lower frame 122. The upper frame 121 and the lower frame 122 are connected to fix the water pump 30, the circuit board 60, and the battery 70.

[0041] like Figure 5 and Figure 6 As shown in the embodiment of this utility model, another portable coffee machine 100 is provided. The installation method of the pressure detection element 50 and the first through hole 111 in this embodiment is different from that in the above embodiment, but the other structures are the same. In this embodiment, the housing assembly 10 includes a locking plate 116 connected to the first through hole 111. The locking plate 116 has a second through hole 117 communicating with the first through hole 111. The pressure detection element 50 has a second latching part 53 on the side facing the locking plate 116. The second latching part 53 passes through the second through hole 117. When the pressure detection element 50 is in the unlocked position, the second latching part 53 can pass through the second through hole 117. When the pressure detection element 50 is in the locked position, the second latching part 53 abuts against the side of the locking plate 116 facing the inside of the housing assembly 10.

[0042] In this embodiment, the locking plate 116 is provided with a through hole 118 for the detection end 54 of the pressure detection element 50 to pass through. During the installation of the pressure detection element 50, when the second latching part 53 is aligned with the second through hole 117 and the pressure detection element 50 is inserted into the first through hole 111, the pressure detection element 50 is in the unlocked position. At this time, the pressure detection element 50 can move or rotate axially in the first through hole 111. When the pressure detection element 50 rotates to the locked position, the second latching part 53 abuts against the side of the locking plate 116 facing the inside of the housing assembly 10 to restrict the degree of freedom of movement of the pressure detection element 50 in the first through hole 111, so that the pressure detection element 50 is fixed in the first through hole 111 axially, thus completing the installation and fixing of the pressure detection element 50. When it is necessary to remove the pressure detection element 50, after rotating the pressure detection element 50 from the locked position to the unlocked position, the second latching part 53 can pass through the second through hole 117, and the pressure detection element 50 can be removed from the first through hole 111.

[0043] like Figure 5 and Figure 6 As shown, in another embodiment, the second latching portion 53 includes a connecting section 531 and a limiting section 532 connected together. The connecting section 531 is connected to the pressure detection element 50 and passes through the second through hole 117. When the pressure detection element 50 is in the unlocked position, the limiting section 532 can pass through the second through hole 117. When the pressure detection element 50 is in the locked position, the limiting section 532 abuts against the side of the locking plate 116 facing the inside of the housing assembly 10.

[0044] In this embodiment, the connecting segment 531 extends axially along the first through hole 111 so that the movement and rotation of the connecting segment 531 are unaffected regardless of whether the pressure detection element 50 is in the unlocked or locked position. The extending direction of the limiting segment 532 is perpendicular to the axial direction of the first through hole 111, so that when the pressure detection element 50 is in the locked position, the limiting segment 532 can abut against the side of the locking plate 116 facing the interior of the housing assembly 10, restricting the degree of freedom of movement of the pressure detection element 50 in the axial direction of the first through hole 111.

[0045] like Figure 5 and Figure 6 As shown, in another embodiment, the shape of the second through hole 117 is the same as the shape of the limiting segment 532.

[0046] In this embodiment, by making the shape of the limiting segment 532 the same as the shape of the second through hole 117, when the pressure detection element 50 switches from the locked position to the unlocked position, the limiting segment 532 and the second through hole 117 must be completely aligned so that the limiting segment 532 can pass through the second through hole 117. This increases the difficulty for the limiting segment 532 to pass through the second through hole 117, thereby reducing the probability that the pressure detection element 50 will rotate from the locked position to the unlocked position without human intervention.

[0047] like Figure 5 and Figure 6 As shown, in another embodiment, the limiting segment 532 is arc-shaped, and the width of the limiting segment 532 gradually increases from the connection point with the connecting segment 531 toward the free end.

[0048] In this embodiment, when the pressure detection element 50 rotates, the movement trajectory of the connecting segment 531 is arc-shaped on the axial section of the first through hole 111. Therefore, the limiting segment 532 is set in a curved teardrop shape, that is, the limiting segment 532 has a smaller width at one end and a larger width at the other end. The connecting segment 531 is connected to the narrower end of the limiting segment 532, so that when the pressure detection element 50 rotates, the hole wall of the second through hole 117 will not obstruct the movement of the connecting segment 531, thereby facilitating the rotation of the pressure detection element 50.

[0049] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A portable coffee machine, characterized in that, include: The housing assembly has a first through hole; A water tank is installed within the housing assembly; A water pump is installed inside the housing assembly. The water pump has an inlet end and an outlet end, and the water tank is connected to the inlet end of the water pump. An extraction assembly, installed within the housing assembly, is connected to the outlet end of the water pump; and, A pressure detection element is installed in the first through hole. The pressure detection element has a detection end, which is connected to the extraction assembly. The pressure detection element is used to detect and display the pressure inside the extraction assembly. The pressure detection element has an unlocked position and a locked position. The pressure detection element can rotate relative to the first through hole to switch between the unlocked position and the locked position. When the pressure detection element is in the unlocked position, the pressure detection element is movably connected to the first through hole. When the pressure detection element is in the locked position, the pressure detection element and the first through hole are fixed relative to each other in the axial direction of the first through hole.

2. The portable coffee machine according to claim 1, characterized in that, The housing assembly is provided with a sliding groove communicating with the first through hole. The outer wall of the pressure detection element is provided with a first snap-fit ​​part. The first snap-fit ​​part is slidably connected to the sliding groove. When the pressure detection element is in the unlocked position, the first snap-fit ​​part can slide on the sliding groove. When the pressure detection element is in the locked position, the first snap-fit ​​part is fixed relative to the sliding groove.

3. The portable coffee machine according to claim 2, characterized in that, The groove includes a first groove segment extending axially along the first through hole and a second groove segment extending circumferentially along the first through hole, the first groove segment and the second groove segment being connected.

4. The portable coffee machine according to claim 3, characterized in that, The second groove section has a groove on the side facing away from the inside of the housing assembly, and the first snap-fit ​​part has a protrusion on the side facing away from the inside of the housing assembly. When the pressure detection element is in the locked position, the protrusion snaps into the groove.

5. The portable coffee machine according to claim 1, characterized in that, The housing assembly includes a locking plate connected to the first through hole. The locking plate has a second through hole communicating with the first through hole. The pressure detection element has a second latching portion on the side facing the locking plate. The second latching portion passes through the second through hole. When the pressure detection element is in the unlocked position, the second latching portion can pass through the second through hole. When the pressure detection element is in the locked position, the second latching portion abuts against the side of the locking plate facing the inside of the housing assembly.

6. The portable coffee machine according to claim 5, characterized in that, The second latching part includes a connecting section and a limiting section connected together. The connecting section is connected to the pressure detection element and passes through the second through hole. When the pressure detection element is in the unlocked position, the limiting section can pass through the second through hole. When the pressure detection element is in the locked position, the limiting section abuts against the side of the locking plate facing the inside of the housing assembly.

7. The portable coffee machine according to claim 6, characterized in that, The shape of the second through hole is the same as the shape of the limiting segment.

8. The portable coffee machine according to claim 7, characterized in that, The limiting segment is arc-shaped, and the width of the limiting segment gradually increases from the connection point with the connecting segment towards the free end.

9. The portable coffee machine according to any one of claims 1-8, characterized in that, A sealing ring is provided between the pressure detection element and the first through hole.

10. The portable coffee machine according to any one of claims 1-8, characterized in that, The extraction assembly includes an extraction bottom cover, an extraction top cover, and an extraction chamber. The extraction top cover is connected to the housing assembly, and the extraction chamber is installed on the extraction bottom cover. The extraction bottom cover and the extraction top cover are detachably connected.

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