Portable coffee machine

Abstract

The present application provides a portable coffee machine. The portable coffee machine comprises a water tank (1), a coffee brewing seat (2), and a pressure applying assembly (3); a communicating cavity (4) is formed between a water storage cavity (11) of the water tank (1) and a coffee brewing cavity (21) of the coffee brewing seat (2); the pressure applying assembly (3) is mounted on the water tank (1); the pressure applying assembly (3) comprises an inner sleeve (32) and an elastic reset member (35); the elastic reset member (35) is fitted over the inner sleeve (32); a pressure applying portion (33) is arranged close to the end of the inner sleeve (32) distant from the communicating cavity (4); the end of the inner sleeve (32) close to the pressure applying portion (33) is provided with an abutting wall (37); the elastic reset member (35) abuts against the abutting wall (37) in the axial direction of the inner sleeve (32); an inner guide rod (125) is provided at the communicating cavity (4); a guide rod channel (120) passes through the inner guide rod (125) in the length direction; the guide rod channel (120) is communicated with the communicating cavity (4); the inner sleeve (32) is fitted over the inner guide rod (125) and is slidably fitted to the inner guide rod (125); the outer peripheral wall of the inner guide rod (125) is sealedly connected to the inner peripheral wall of the inner sleeve (32); and the guide rod channel (120) is communicated with an inner cavity (321) of the inner sleeve (32). The coffee machine can prevent a piston from being separated from a push rod, thereby ensuring the structural stability, avoiding frequent pressing, and ensuring the quality of coffee.

Description

Portable coffee machine Technical Field

[0001] The present application relates to the technical field of coffee machines, and in particular to a portable coffee machine. Background Art

[0002] In order to ensure the taste of coffee and the convenience of carrying, a portable coffee machine has appeared on the market. A piston rod is set at the hydraulic seat between the water tank and the coffee brewing seat. By pressing the piston rod, the water in the water tank is forced into the coffee brewing seat to achieve coffee brewing.

[0003] There is currently a piston rod, which includes a piston, a push rod, and a spring. The piston, made of an elastic material, is connected to the free end of the push rod. The spring is sleeved on the outside of the push rod, with both ends abutting the pressing end of the push rod and the inner wall of the coffee machine respectively. Under the action of the restoring force of the spring, the push rod is pushed and the piston is pulled back. When the spring is reset, the spring applies a force to the push rod and drives the piston to move along the corresponding slide groove. The friction between the piston and the slide groove forces the piston to move away from the push rod. At the same time, because the piston is made of an elastic material, it is easy to detach from the push rod after being subjected to force, causing the piston rod to lose its function. In addition, the existing application assembly is a piston rod that extends into a sleeve and slides with the sleeve. The piston rod is located in the sleeve, which takes up a large space inside the sleeve. The amount of hot water temporarily stored in the sleeve is small, and the user needs to press the piston rod frequently, which is a poor experience. Summary of the Invention

[0004] The purpose of this application is to provide a portable coffee machine that can prevent the piston from detaching from the push rod, ensure structural stability, and at the same time does not require frequent pressing and can ensure the quality of coffee.

[0005] To achieve the above-mentioned purpose, the present application provides a portable coffee machine, comprising a water tank, wherein a water storage chamber is provided in the water tank; a coffee brewing seat, wherein the coffee brewing seat is arranged below the water tank, wherein a coffee brewing chamber is provided in the coffee brewing seat, a connecting chamber is provided between the water storage chamber and the coffee brewing chamber, wherein the water storage chamber and the coffee brewing chamber are connected via the connecting chamber, wherein the water storage chamber and the connecting chamber are connected via a water inlet valve, and wherein the connecting chamber and the coffee brewing chamber are connected via a water outlet valve; a pressure applying component, wherein the pressure applying component is mounted on the water tank, wherein the pressure applying component comprises a pressure applying portion, wherein the pressure applying portion is exposed outside the water tank; and a pressure applying component The component also includes an inner sleeve and an elastic reset member, the elastic reset member is sleeved on the outside of the inner sleeve, the pressure-applying portion is arranged near the end of the inner sleeve away from the connecting cavity, the end of the inner sleeve near the pressure-applying portion is provided with an abutting wall, and the elastic reset member abuts against the abutting wall in the axial direction of the inner sleeve; an inner guide rod is provided at the connecting cavity, the inner guide rod is provided with a guide rod channel running through it along the length direction, the guide rod channel is connected to the connecting cavity, the inner sleeve is sleeved on the outside of the inner guide rod and slidably cooperates with the inner guide rod, the outer peripheral wall of the inner guide rod is sealed with the inner peripheral wall of the inner sleeve, and the guide rod channel is connected to the inner cavity of the inner sleeve. When the pressure-applying portion is subjected to an applied force, the inner sleeve moves toward the connecting cavity and applies positive pressure to the connecting cavity to open the water outlet valve; when the applied force on the pressure-applying portion is removed, the elastic reset member forces the inner sleeve to move in a direction away from the connecting cavity under the action of its own elastic restoring force, and the inner sleeve applies negative pressure to the connecting cavity to open the water inlet valve.

[0006] As can be seen from the above scheme, by providing an inner guide rod on the water tank, an inner sleeve is mounted on the outside of the inner guide rod and is slidably connected to the inner guide rod, and an elastic return member is mounted on the outside of the inner sleeve and is sealed to the inner circumferential wall of the inner sleeve through the outer circumferential wall of the inner guide rod. This allows the application of positive or negative pressure to the connecting chamber when the inner sleeve moves relative to the inner guide rod. Because the inner sleeve is mounted outside the inner guide rod, there is no need to provide a piston. The problem of the piston detaching from the push rod due to the direction of the force applied by the elastic return member on the push rod being opposite to the direction of the friction force applied to the piston, as in the prior art, does not occur. At the same time, the inner guide rod has a hollow structure. Hot water entering the connecting chamber from the water inlet valve can be temporarily stored in the guide rod channel of the inner guide rod. This provides a large storage space, can reduce the frequency of user pressing, and improve the user experience. In addition, the inner guide rod and inner sleeve are arranged in multiple layers to provide insulation, preventing the external ambient temperature from affecting the temperature of the water in the inner guide rod, thereby ensuring the quality of the coffee. Furthermore, the sealing connection between the outer peripheral wall of the inner guide rod and the inner peripheral wall of the inner sleeve can prevent water from flowing out from between the inner sleeve and the inner guide rod, thereby improving the overall sealing performance.

[0007] A further solution is that the pressure assembly further includes a sealing ring, which is sleeved on an end of the inner guide rod away from the communicating cavity and is squeezed between the outer circumferential wall of the inner guide rod and the inner circumferential wall of the inner sleeve.

[0008] This shows that the sealing performance between the inner guide rod and the inner sleeve is further improved.

[0009] A further solution is that the number of the sealing rings is more than two, and the plurality of sealing rings are arranged at intervals along the axial direction of the inner guide rod.

[0010] A preferred solution is that the coffee brewing seat includes a capsule positioning shell and a card seat, both of which are located in the coffee brewing chamber, the card seat is arranged at the bottom of the capsule positioning shell, and the capsule positioning shell and the card seat form a capsule installation chamber; a rotation-stop protrusion is provided on the card seat, and a matching protrusion is provided on the outer peripheral wall of the capsule positioning shell, and the matching protrusion and the rotation-stop protrusion are matched at the circumferential upper limit of the card seat.

[0011] Thus, by providing the anti-rotation protrusion on the holder and the matching protrusion on the capsule positioning shell, the matching protrusion and the anti-rotation protrusion are positioned in the circumferential direction of the holder. This prevents the capsule positioning shell from rotating relative to the holder when the coffee brewing holder is screwed into the water tank, thereby preventing the coffee capsule from being damaged by the screwing force.

[0012] A further solution is that the number of the anti-rotation protrusions is more than two, and the multiple anti-rotation protrusions are arranged at intervals along the circumference of the holder, and two adjacent anti-rotation protrusions form an anti-rotation groove, and the matching protrusion extends into the anti-rotation groove.

[0013] It can be seen that this can avoid to a greater extent the problem that the capsule positioning shell rotates relative to the holder, causing the coffee capsule to be damaged by the twisting force.

[0014] A preferred solution is that the pressure-applying assembly also includes an outer sleeve, and the outer sleeve and the inner sleeve are both coaxially arranged with the inner guide rod, and the outer sleeve and the inner sleeve are integrally formed; an installation cavity is formed between the outer sleeve and the inner sleeve, the outer sleeve is located radially outside the inner sleeve, and the elastic reset part is located in the installation cavity.

[0015] It can be seen that through the setting of the outer sleeve, the hot water in the guide rod channel of the inner guide rod is further kept warm, and at the same time, the guidance of the inner sleeve can be achieved better and more stably, and an installation cavity for installing the elastic reset part is formed between the outer sleeve and the inner sleeve, which is convenient for assembly.

[0016] A further solution is that a receiving groove extending in a horizontal direction is opened on the water tank, the notch of the receiving groove is located on the peripheral wall of the water tank, the pressure-applying assembly is installed in the receiving groove, and the pressure-applying part extends from the notch.

[0017] It can be seen that providing a receiving groove on the water tank for placing the pressure-applying component can further simplify the structure of the coffee machine, reduce the use of parts, thereby improving assembly efficiency, reducing costs and reducing the size of the coffee machine.

[0018] A further solution is that a limiting protrusion is provided at one end of the outer sleeve away from the pressure-applying portion, the limiting protrusion protrudes outward from the outer peripheral wall of the outer sleeve along the radial direction of the outer sleeve, and a limiting step is provided at the notch of the accommodating groove, and the limiting protrusion and the limiting step cooperate to limit the movement direction of the outer sleeve.

[0019] It can be seen that the limiting cooperation between the limiting protrusion and the limiting step in the movable direction of the inner sleeve can prevent the pressure-applying component from falling off the water tank.

[0020] A further solution is that a positioning protrusion is provided on the first groove wall of the accommodating groove, the connecting cavity is located on the first groove wall, and a positioning groove is provided at the fixed end of the inner guide rod. The positioning protrusion and the positioning groove are plugged into and matched along the moving direction of the inner sleeve, and the fixed end of the inner guide rod is fixed on the first groove wall of the accommodating groove.

[0021] It can be seen that through the cooperation between the positioning protrusion and the inner guide rod, the positioning of the inner guide rod can be achieved, ensuring that the inner guide rod is stably connected to the water tank.

[0022] A preferred solution is that a brewing seat coffee outlet is provided on the bottom wall of the coffee brewing seat, a coffee outflow nozzle is provided at the coffee outlet of the brewing seat, a coffee outflow outlet is provided on the coffee outflow nozzle, and the coffee outflow outlet can be connected with the coffee outlet of the brewing seat; a coffee outflow control valve and a guide plate are provided in the coffee outflow nozzle, and the coffee outflow control valve can open or close the coffee outlet of the brewing seat; the guide plate is located between the coffee outflow control valve and the coffee outflow outlet, and a guide hole is provided on the guide plate along the thickness direction, the guide hole is connected with the coffee outflow outlet, and the size of the guide hole is smaller than the size of the coffee outflow outlet.

[0023] It can be seen that by setting a guide plate in the coffee flow outlet, the coffee breaks through the coffee flow control valve and flows out of the coffee outlet of the brewing seat, and then passes through the smaller guide hole, which can pressurize the coffee, thereby making the coffee extraction effect better, the foam richer, the oil quality better, and greatly improving the taste of the coffee. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0025] FIG1 is a structural diagram of an embodiment of a portable coffee machine of the present application.

[0026] FIG2 is a cross-sectional view of the portable coffee machine embodiment of the present application from a first perspective after the top cover is hidden.

[0027] FIG3 is an exploded view of the structure of the portable coffee machine embodiment of the present application after the top cover is hidden.

[0028] FIG4 is a structural diagram showing the positions of the water inlet valve and the water outlet valve in an embodiment of the portable coffee machine of the present application.

[0029] FIG5 is a structural diagram of a capsule positioning shell and a card seat in an embodiment of a portable coffee machine of the present application.

[0030] FIG6 is a cross-sectional view of the bottom of the coffee brewing seat, the guide plate, the coffee outflow nozzle and the coffee outflow control valve in the embodiment of the portable coffee machine of the present application.

[0031] FIG7 is a structural exploded view of the bottom of the coffee brewing base and the guide plate in the embodiment of the portable coffee machine of the present application.

[0032] The present application is further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0033] 1 to 4 , the portable coffee maker of this embodiment includes a water tank 1, a coffee brewing base 2, and a pressure-applying assembly 3. The water tank 1 includes a water storage chamber 11. The coffee brewing base 2 is disposed below the water tank 1. The coffee brewing base 2 includes a coffee brewing chamber 21. A connecting chamber 4 is disposed between the water storage chamber 11 and the coffee brewing chamber 21, thereby connecting the water storage chamber 11 and the coffee brewing chamber 21.

[0034] The water storage chamber 11 is connected with the communicating chamber 4 through the water inlet valve 5, and the communicating chamber 4 is connected with the coffee brewing chamber 21 through the water outlet valve 6. The water inlet valve 5 and the water outlet valve 6 are arranged in the horizontal direction, and the water inlet valve 5 and the water outlet valve 6 are both one-way valves. The specific structure is shown in Figure 4. The water outlet valve 6 includes a water outlet valve seat 61, a water outlet valve core 62, a water outlet spring 63 and a water outlet support seat 64. The water outlet valve seat 61 is integrally formed with the water tank 1. A water outlet 65 is provided on the water outlet valve seat 61. The water outlet valve core 62 abuts against the water outlet valve seat 61 from the bottom and the water outlet valve core 61 can block the water outlet 65. The two ends of the water outlet spring 63 abut against the water outlet valve core 62 and the water outlet support seat 64 respectively. The water outlet support seat 64 is detachably fixed to the water tank 1. A water outlet seat hole 641 is provided on the water outlet support seat 64, and the water outlet 65 can be connected with the water outlet seat hole 641. The water inlet valve 5 includes a water inlet valve seat 51, a water inlet valve core 52, and a water inlet spring 53. The water inlet valve seat 51 is detachably fixedly connected to the water tank 1. A water inlet port 54 is defined on the water inlet valve seat 51. The water inlet valve core 52 can block the water inlet port 54. The two ends of the water inlet spring 53 respectively abut the water inlet valve core 52 and the top wall of the connecting chamber 4. The water inlet valve seat 51 includes a valve seat body 511 and a pressure block 512. The water inlet port 54 includes a vertical extension section 541 and a horizontal extension section 542. The horizontal extension section 542 is connected to the bottom end of the vertical extension section 541. A connecting chamber water inlet 41 is defined on the side wall of the connecting chamber 4. The horizontal extension section 542 is disposed opposite to and communicates with the connecting chamber water inlet 41. The water inlet valve core 52 abuts the top end of the vertical extension section 541.

[0035] The water tank 1 is provided with a receiving groove 12 extending in a horizontal direction. The notch 121 of the receiving groove 12 is located on the peripheral wall of the water tank 1 , and the pressure-applying assembly 3 is installed in the receiving groove 12 .

[0036] The pressure-applying assembly 3 includes a sleeve assembly 30 , an elastic return member 35 and two sealing rings 36 .

[0037] The sleeve assembly 30 includes an outer sleeve 31 and an inner sleeve 32 that are coaxially arranged and integrally formed. The outer sleeve 31 is located radially outside the inner sleeve 32. The extension direction of the outer sleeve 31 and the inner sleeve 32 is parallel to the extension direction of the accommodating groove 12. The outer sleeve 31 and the inner sleeve 32 are connected at the outer end away from the connecting cavity 4. The outer end of the outer sleeve 31 is provided with a pressure-applying portion 33, which extends from the slot 121 and is exposed to the water tank 1.

[0038] A positioning protrusion 123 is provided on the first groove wall 124 of the accommodating groove 12 opposite to the notch 121, and the communicating cavity 4 is located on the positioning protrusion 123. An inner guide rod 125 is also provided in the accommodating groove 12, and the inner guide rod 125 is coaxially arranged with the outer sleeve 31 and the inner sleeve 32. A positioning groove 126 is provided at the fixed end of the inner guide rod 125, and a guide rod channel 120 is provided through the inner guide rod 125 along the length direction. The guide rod channel 120 is communicated with the communicating cavity 4, and the positioning protrusion 123 and the positioning groove 126 are plugged in and matched along the moving direction of the sleeve assembly 30, and the fixed end of the inner guide rod 125 is fixed on the first groove wall 124 of the accommodating groove 12.

[0039] The inner sleeve 32 is sleeved on the outer side of the inner guide rod 125 and slidably cooperates with the inner guide rod 125 . The outer peripheral wall of the inner guide rod 125 is sealedly connected to the inner peripheral wall of the inner sleeve 32 . The guide rod channel 120 is connected to the inner cavity 321 of the inner sleeve 32 .

[0040] Preferably, the elastic return member 35 is a spring. The elastic return member 35 is sleeved outside the inner sleeve 32 and located within the mounting cavity 38 formed between the outer sleeve 31 and the inner sleeve 32. An abutment wall 37 is provided at one end of the outer sleeve 31 near the pressure-applying portion 33. The first end of the elastic return member 35 abuts the abutment wall 37 in the axial direction of the inner sleeve 32. The second end of the elastic return member 35 abuts a limiting boss 1251 on the inner guide rod 125, which protrudes outward from the outer circumferential wall of the inner guide rod 125.

[0041] Two mounting grooves 1252 are provided on the peripheral wall of the inner guide rod 125 at one end away from the communicating cavity 4. The two mounting grooves are arranged at intervals along the axial direction of the inner guide rod 125. A sealing ring 36 is installed in each mounting groove 1252. The two sealing rings 36 are both sleeved on the inner guide rod 125 and squeezed between the outer peripheral wall of the inner guide rod 125 and the inner peripheral wall of the inner sleeve 32.

[0042] A limiting protrusion 311 is provided at one end of the outer sleeve 31 away from the pressure-applying portion 33. The limiting protrusion 311 protrudes outward from the outer peripheral wall of the outer sleeve 31 along the radial direction of the outer sleeve 31. The notch 121 of the accommodating groove 12 is provided with a limiting step 122. The limiting protrusion 311 and the limiting step 122 cooperate to limit the movement direction of the outer sleeve 31, thereby preventing the pressure-applying component 3 from detaching from the accommodating groove 12.

[0043] 5 , the coffee brewing station 2 includes a capsule positioning housing 22 and a holder 23. Both the capsule positioning housing 22 and the holder 23 are located within the coffee brewing chamber 21. The holder 23 is disposed at the bottom of the capsule positioning housing 22. The capsule positioning housing 22 and the holder 23 form a capsule mounting chamber 24 for receiving a coffee capsule. The holder 23 is provided with a rotation-stopping protrusion 231. There are two or more rotation-stopping protrusions 231. In this embodiment, there are four rotation-stopping protrusions 231, which are spaced apart along the circumference of the holder 23. Adjacent rotation-stopping protrusions 231 form a rotation-stopping groove 232. A mating protrusion 221 is provided on the outer peripheral wall of the capsule positioning housing 22. The mating protrusion 221 extends into the rotation-stopping groove 232 and engages with the mating protrusion at the circumferential upper limit of the holder 23. By providing a rotation-stopping protrusion 231 on the holder 23 and a matching protrusion 221 on the capsule positioning shell 22, the matching protrusion 221 and the rotation-stopping protrusion 231 are positioned in the circumferential direction of the holder 23. This prevents the capsule positioning shell 22 from rotating relative to the holder 23 when the coffee brewing base 2 is screwed into the water tank 1, thereby preventing the coffee capsule from being damaged by the screwing force.

[0044] After the pressure-applying portion 33 is subjected to the pressing force applied by the user, the sleeve assembly 30 moves toward the connecting chamber 4 and applies positive pressure to the connecting chamber 4. The water outlet valve core 62 is subjected to force and moves away from the water outlet 65 to open the water outlet valve 6. At the same time, the water inlet valve 5 is closed and the elastic reset member 35 is compressed and deformed. The hot water in the connecting chamber 4 can enter the coffee brewing chamber 21 through the water outlet valve 6 to brew coffee.

[0045] After the user releases the force applied to the pressure portion 33, the elastic return member 35, under its own elastic restoring force, forces the sleeve assembly 30 to move away from the connecting chamber 4. The inner sleeve 32 applies negative pressure to the connecting chamber 4, and the water inlet valve core 52 moves away from the water inlet 54 to open the water inlet valve 5. At the same time, the water outlet valve 6 closes, and the hot water in the water storage chamber 11 enters the connecting chamber 4 through the water inlet valve 5 and is temporarily stored in the connecting chamber 4. By intermittently pressing the pressure portion 33, the user can supply the hot water in the water storage chamber 11 to the coffee brewing chamber 21.

[0046] 6 and 7 , a coffee outlet 25 is provided on the bottom wall of the coffee brewing seat 2. A mounting portion 26 is also provided on the bottom wall of the coffee brewing seat 2. The coffee outlet 25 is located on the mounting portion 26. A coffee outflow nozzle 27 is mounted on the mounting portion 26. The coffee outflow nozzle 27 is threadedly connected to the mounting portion 26. A coffee outflow nozzle 271 is provided on the bottom wall of the coffee outflow nozzle 27. The coffee outflow nozzle 27 can be communicated with the coffee outlet 25 of the brewing seat.

[0047] A coffee outflow control valve 7 and a guide plate 8 are disposed within the coffee outflow nozzle 27. The guide plate 8 is located between the mounting portion 26 and the bottom wall of the coffee outflow nozzle 27. The coffee outflow control valve 7 can open or close the brewing station coffee outlet 25. The coffee outflow control valve 7 includes a valve core 71 and a spring 72. The valve core 71 can block the brewing station coffee outlet 25. The two ends of the spring 72 abut the valve core 71 and the guide plate 8, respectively. Six guide holes 81 are formed through the guide plate 8 along its thickness. These six guide holes 81 are evenly spaced along the circumference of the guide plate 8 and communicate with the coffee outflow outlet 271. Each guide hole 81 is smaller than the coffee outflow outlet 271.

[0048] By providing a deflector plate 8 within the coffee outlet spout 27, coffee, after breaking through the coffee outflow control valve 7 and flowing out of the brewing base coffee outlet 25, passes through the smaller deflector holes 81, pressurizing the coffee. This results in better extraction, richer foam, and better oil quality, significantly improving the coffee taste. In this embodiment, the deflector plate 8 and deflector holes 81 are both circular in shape. In other embodiments, they can also be rectangular, elliptical, or other irregular shapes. The number and size of the deflector holes 81 can also be varied as needed.

[0049] As can be seen from the above, by providing an inner guide rod on the water tank, an inner sleeve is mounted on the outside of the inner guide rod and is slidably connected to the inner guide rod, and an elastic return member is mounted on the outside of the inner sleeve and is sealed to the inner circumferential wall of the inner sleeve through the outer circumferential wall of the inner guide rod. This allows positive or negative pressure to be applied to the connecting chamber when the inner sleeve moves relative to the inner guide rod. Because the inner sleeve is mounted outside the inner guide rod, there is no need for a piston. The problem of the piston detaching from the push rod due to the force applied by the elastic return member in the opposite direction to the friction force applied to the piston, as in the prior art, is avoided. Furthermore, the inner guide rod has a hollow structure. Hot water entering the connecting chamber from the water inlet valve can be temporarily stored in the guide rod channel of the inner guide rod, providing a large storage space, reducing the frequency of user pressure and improving the user experience. Furthermore, the multiple layers of the inner guide rod and inner sleeve provide insulation, preventing the external ambient temperature from affecting the temperature of the water in the inner guide rod, thereby ensuring coffee quality. Furthermore, the sealing connection between the outer peripheral wall of the inner guide rod and the inner peripheral wall of the inner sleeve can prevent water from flowing out from between the inner sleeve and the inner guide rod, thereby improving the overall sealing performance.

[0050] Finally, it should be emphasized that the above is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A portable coffee machine, comprising: A water tank having a water storage chamber disposed therein; A coffee brewing seat disposed below the water tank. The coffee brewing seat has a coffee brewing chamber therein. A communication chamber is provided between the water storage chamber and the coffee brewing chamber. The water storage chamber and the coffee brewing chamber are communicated through the communication chamber. The water storage chamber is communicated with the communication chamber through a water inlet valve, and the communication chamber is communicated with the coffee brewing chamber through a water outlet valve; A pressing assembly mounted on the water tank. The pressing assembly includes a pressing portion that is exposed outside the water tank; Characterized in that: The pressing assembly further includes an inner sleeve and an elastic reset member. The elastic reset member is sleeved outside the inner sleeve. The pressing portion is disposed near one end of the inner sleeve away from the communication chamber. An abutting wall is provided at one end of the inner sleeve near the pressing portion. The elastic reset member abuts against the abutting wall in the axial direction of the inner sleeve; An inner guide rod is provided at the communication chamber. The inner guide rod is provided with a guide rod channel penetrating along the length direction. The guide rod channel is communicated with the communication chamber. The inner sleeve is sleeved outside the inner guide rod and is in sliding fit with the inner guide rod. The outer peripheral wall of the inner guide rod is hermetically connected to the inner peripheral wall of the inner sleeve. The guide rod channel is communicated with the inner cavity of the inner sleeve; After the pressing portion is subjected to a force, the inner sleeve moves toward the communication chamber and applies a positive pressure to the communication chamber to open the water outlet valve; After the force applied to the pressing portion is withdrawn, the elastic reset member forces the inner sleeve to move in a direction away from the communication chamber under the action of its own elastic restoring force. The inner sleeve applies a negative pressure to the communication chamber to open the water inlet valve.

2. The portable coffee machine according to claim 1, characterized in that: The pressing assembly further includes a sealing ring. The sealing ring is sleeved on one end of the inner guide rod away from the communication chamber and is squeezed between the outer peripheral wall of the inner guide rod and the inner peripheral wall of the inner sleeve.

3. The portable coffee machine according to claim 2, characterized in that: The number of the sealing rings is two or more, and a plurality of the sealing rings are arranged at intervals along the axial direction of the inner guide rod.

4. The portable coffee machine according to any one of claims 1 to 3, characterized in that: The coffee brewing seat includes a capsule positioning shell and a card seat. Both the capsule positioning shell and the card seat are located in the coffee brewing chamber. The card seat is disposed at the bottom of the capsule positioning shell. The capsule positioning shell and the card seat enclose a capsule installation chamber; The card seat is provided with a rotation stopping protrusion, and a matching protrusion is provided on the outer peripheral wall of the capsule positioning shell. The matching protrusion and the rotation stopping protrusion are in circumferential limiting cooperation on the card seat.

5. The portable coffee machine according to claim 4, characterized in that: The number of the rotation stopping protrusions is two or more, and a plurality of the rotation stopping protrusions are arranged at intervals along the circumferential direction of the card seat. Adjacent two rotation stopping protrusions enclose a rotation stopping groove, and the matching protrusion extends into the rotation stopping groove.

6. The portable coffee machine according to any one of claims 1 to 3, characterized in that: The pressing component further includes an outer sleeve, the outer sleeve and the inner sleeve are both arranged coaxially with the inner guide rod, and the outer sleeve and the inner sleeve are integrally formed; An installation cavity is formed between the outer sleeve and the inner sleeve. The outer sleeve is located radially outside the inner sleeve, and the elastic reset member is located in the installation cavity.

7. The portable coffee machine according to claim 6, wherein: A receiving groove extending along the horizontal direction is formed in the water tank. The notch of the receiving groove is located on the peripheral wall of the water tank. The pressing component is installed in the receiving groove, and the pressing part extends out from the notch.

8. The portable coffee machine according to claim 7, wherein: A limiting protrusion is provided at one end of the outer sleeve away from the pressing part. The limiting protrusion protrudes radially outward from the outer peripheral wall of the outer sleeve. A limiting step is provided at the notch of the receiving groove. The limiting protrusion and the limiting step are in limiting cooperation in the moving direction of the outer sleeve.

9. The portable coffee machine according to claim 7, wherein: A positioning protrusion is provided on the first groove wall of the receiving groove, and the communication cavity is located on the first groove wall; a positioning groove is provided at the fixed end of the inner guide rod. The positioning protrusion and the positioning groove are inserted and matched along the moving direction of the inner sleeve, and the fixed end of the inner guide rod is fixed on the first groove wall.

10. The portable coffee machine according to any one of claims 1 to 3, wherein: A brewing seat coffee outlet is formed in the bottom wall of the coffee brewing seat. A coffee outflow nozzle is provided at the brewing seat coffee outlet. A coffee outflow port is formed in the coffee outflow nozzle, and the coffee outflow port can communicate with the brewing seat coffee outlet; A coffee outflow control valve and a guide plate are arranged in the coffee outflow nozzle. The coffee outflow control valve can open or close the brewing seat coffee outlet; The guide plate is located between the coffee outflow control valve and the coffee outflow port. A guide hole is formed through the guide plate in the thickness direction, and the guide hole communicates with the coffee outflow port. The size of the guide hole is smaller than the size of the coffee outflow port.

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