CN111728483A

CN111728483A - Combined portable coffee machine

Info

Publication number: CN111728483A
Application number: CN202010748660.3A
Authority: CN
Inventors: 邱猛
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2020-10-02

Abstract

The invention discloses a combined portable coffee machine, which comprises an extraction cylinder, a water bin, a one-way valve and a coffee powder net, wherein a pressurizing device is arranged on the water bin, the pressurizing device comprises a needle valve flow regulating assembly arranged on the water bin, and an air inlet is arranged on the needle valve flow regulating assembly; the pressurizing device also comprises a mechanical pressurizing mechanism arranged at the top of the water sump. The combined portable coffee machine can quickly complete the assembly tool, realize quick assembly and disassembly, can quickly assemble the needle valve flow regulating assembly and the mechanical pressing mechanism on the coffee machine, is convenient to install, can press hot water in the water bin in different modes, and meets different use requirements.

Description

Combined portable coffee machine

Technical Field

The present invention relates to espresso coffee machines, and more particularly, it relates to a modular portable coffee machine.

Background

The principle of the Italian coffee machine is that a mixture of high-pressure steam and water quickly penetrates through a coffee layer to extract coffee instantly, so that the temperature of the coffee is high, the content of impurities such as caffeine is low, and the coffee has a strong taste.

In the prior art, the portable coffee machine generally adopts a mode of pressurizing hot water by arranging a high-pressure air pump in the coffee machine to apply high-pressure air to the hot water in the coffee machine, but the coffee machine is large in size and not easy to carry.

Disclosure of Invention

The present invention is directed to overcome the above-mentioned shortcomings of the prior art, and an object of the present invention is to provide a portable coffee maker with convenient assembly and easy operation.

In order to achieve the purpose, the invention provides a combined portable coffee machine which comprises an extraction cylinder, a water bin, a one-way valve and a coffee powder net, wherein a pressurizing device is arranged on the water bin, the pressurizing device comprises a needle valve flow regulating assembly arranged on the water bin, and an air inlet is formed in the needle valve flow regulating assembly.

Furthermore, the needle valve flow regulating assembly comprises a needle valve seat arranged on the water bin and a needle valve core inserted in a valve cavity of the needle valve seat, and an adjusting sleeve for driving the needle valve core to move axially is arranged on the needle valve seat.

Furthermore, a conical valve needle is arranged at the front end of the needle valve core, a valve cavity matched with the needle valve core is arranged in the needle valve seat, a fluid channel extending to the conical surface of the conical valve needle is arranged in the needle valve core, and the air inlet interface is arranged at the rear end of the fluid channel.

As a further improvement, an axial limiting structure is arranged between the adjusting sleeve and the needle valve core, a positioning sleeve is arranged at the rear end of the adjusting sleeve, and a rotating sleeve connected with the adjusting sleeve is arranged at the front end of the positioning sleeve.

Furthermore, the front end of the positioning sleeve is provided with a first internal thread connected with the adjusting sleeve and a first external thread connected with the rotating sleeve, and a circumferential limiting structure is arranged between the rotating sleeve and the adjusting sleeve.

Furthermore, a second internal thread matched with the first external thread is arranged at the rear end of the rotary sleeve, the pin hole is formed in the front end of the rotary sleeve, a second external thread matched with the first internal thread is arranged on the adjusting sleeve, the first internal thread is opposite to the thread of the second internal thread, and the first external thread is opposite to the thread of the second external thread.

As a further improvement, a positioning cylinder is arranged on a top cover of the water sump, a convex block is arranged on the inner wall of the positioning cylinder, a plug connector is arranged in the positioning cylinder, an L-shaped clamping groove matched with the convex block is arranged on the outer wall of the plug connector, an air hole is arranged on the plug connector, and a pressure gauge is arranged at the top end of the air hole.

As a further improvement, the pressurizing device further comprises a mechanical pressurizing mechanism arranged at the top of the water sump, the mechanical pressurizing mechanism comprises an air cylinder arranged at the top of the water sump, a piston and a piston rod are arranged in the air cylinder, a sliding sleeve is arranged between the piston rod and the inner wall of the air cylinder, an axial sliding groove and a sliding pin are arranged between the sliding sleeve and the piston rod, a limiting convex edge is arranged on the outer wall of the sliding sleeve, a limiting ring matched with the limiting convex edge is arranged at the top of the air cylinder, and a push-pull mechanism connected with the piston rod is arranged on the sliding sleeve.

Furthermore, the push-pull mechanism is a scissor-type lifting mechanism, the scissor-type lifting mechanism comprises a first hinged seat arranged at the top end of the sliding sleeve and a push-pull rod penetrating through the first hinged seat and connected with the piston rod, a second hinged seat is arranged at the top end of the push-pull rod, connecting rods are hinged to two sides of the first hinged seat and the second hinged seat, a third hinged seat is arranged between the two connecting rods located on one side, a fourth hinged seat is arranged between the two connecting rods located on the other side, a screw nut mechanism is arranged between the third hinged seat and the fourth hinged seat, and a through groove for a screw of the screw nut mechanism to penetrate through is formed in the piston rod.

Furthermore, first articulated seat cover is established the top of sliding sleeve, the top of sliding sleeve be equipped with the stop nut that the top surface of first articulated seat suited, the top of sliding sleeve be equipped with the spacing step that the bottom surface of first articulated seat suited.

Advantageous effects

Compared with the prior art, the combined portable coffee machine has the following beneficial effects:

(1) according to the combined portable coffee machine, the needle valve flow regulating assembly and the mechanical pressing mechanism can be quickly assembled on the coffee machine, the installation is convenient, hot water in the water bin can be pressed in different modes, and different use requirements are met;

(2) the needle valve flow regulating assembly is convenient to regulate air pressure, all parts forming the needle valve flow regulating assembly are revolving bodies, and the regulation of air inflow is realized by rotating the regulating sleeve, so that the needle valve flow regulating assembly is ingenious in structural design, compact in structure and accurate in air pressure regulation;

(3) according to the combined portable coffee machine, the mechanical pressing mechanism can be arranged on the water bin, the piston rod is driven by the screw rod transmission mechanism and pushes the piston to compress the gas in the air cylinder and the water bin, so that hot water is pressed, and the combined portable coffee machine is simple to operate, convenient to assemble and disassemble and convenient to carry; the stroke of the piston rod can be adjusted, namely the water quantity of the water bin entering the extraction cylinder can be adjusted, and quantitative extraction is realized.

Drawings

FIG. 1 is a schematic structural view of the modular portable coffee maker of the present invention;

FIG. 2 is an enlarged schematic view of the structure of the needle valve flow control assembly of the present invention;

FIG. 3 is an enlarged cross-sectional view of the needle valve seat construction of the present invention;

FIG. 4 is an enlarged cross-sectional view of the structure of a needle valve cartridge of the present invention;

FIG. 5 is an enlarged sectional view of the structure of the adjusting sleeve of the present invention;

FIG. 6 is an enlarged sectional view of the structure of the positioning sleeve of the present invention;

FIG. 7 is an enlarged sectional view showing the structure of the rotary sleeve according to the present invention;

FIG. 8 is an enlarged sectional view showing the construction of the rear cover in the present invention;

FIG. 9 is an enlarged cross-sectional view of the construction of the through-connection of the present invention;

FIG. 10 is an enlarged schematic view of the construction of the steering joint of the present invention;

FIG. 11 is an enlarged cross-sectional view of the construction of the steering joint of the present invention;

FIG. 12 is a structural cross-sectional view of the mechanical pressing mechanism of the present invention;

FIG. 13 is an enlarged view of the push-pull mechanism of the present invention;

fig. 14 is an enlarged view of the push-pull rod according to the present invention;

FIG. 15 is an enlarged top view of the first hinge base of the present invention;

FIG. 16 is an enlarged cross-sectional view of the one-way valve of the present invention in connection with a water inlet fitting and a dosing burette;

FIG. 17 is an enlarged sectional view of the structure of the water inlet fitting of the present invention.

In the figure: 1. an extraction tank; 2. a safety valve; 3. a water sump; 4. a one-way valve; 5. a coffee grounds net; 6. a mechanical pressing mechanism; 61. an air cylinder; 62. a piston; 63. a piston rod; 64. a sliding sleeve; 65. an axial chute; 66. a slide pin; 67. a limiting convex edge; 68. a limiting ring; 69. a push-pull mechanism; 691. a first hinge mount; 692. a push-pull rod; 693. a second hinge mount; 694. a connecting rod; 695. a third hinge mount; 696. a fourth hinge base; 697. a lead screw nut mechanism; 698. a through groove; 699. trepanning; 610. an annular groove; 611. a limit nut; 612. a limiting step; 7. a needle valve flow regulating assembly; 71. a needle valve seat; 711. a tapered hole; 712. a guide hole; 72. a third external thread; 714. a third internal thread; 72. a needle valve core; 721. a conical valve needle; 722. a conical valve needle; 723. mounting grooves; 724. a limiting groove; 725. a positioning part; 726. positioning a groove; 727. an air inlet interface; 73. an adjusting sleeve; 731. a first screw hole; 732. a second external thread; 733. a second screw hole; 734. a third internal thread; 74. a positioning sleeve; 741. a first internal thread; 742. a first external thread; 743. a positioning cavity; 75. a rotating sleeve; 751. a pin hole; 752. a second internal thread; 76. a rear cover; 77. a straight-through joint; 78. a steering joint; 8. a positioning cylinder; 9. a bump; 10. a plug-in connector; 11. an L-shaped clamping groove; 12. a pressure gauge; 13. a water inlet joint; 14. a quantitative burette; 15. a first adjusting thread structure; 16. a tapered joint; 17. an axial flow passage; 18. a radial flow passage; 19. a tapered hole; 20. and a second positioning thread structure.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.

The specific embodiments of the present invention are such that: as shown in fig. 1-17, a combined portable coffee machine comprises an extraction cylinder 1, a water bin 3, a one-way valve 4 and a coffee powder net 5, wherein the extraction cylinder 1 is installed at the bottom end of the water bin 3 through threads, and the coffee powder net 5 is placed in the extraction cylinder 1 and is connected in a sealing way; be equipped with pressure device on the sump 3, pressure device includes that detachable locates needle valve flow control assembly 7 on the sump 3, be equipped with air inlet interface 727 on the needle valve flow control assembly 7, air inlet interface 727 can connect high-pressure pump trachea or gas bomb bottle, can install the bottle opening joint in air inlet interface 727 department when wherein connecting the gas bomb bottle, be equipped with the puncture needle in the bottle opening joint, the gas bomb bottle punctures the needle and punctures the seal port of gas bomb bottle when bottle opening joint through the screw thread, high-pressure gas in the gas bomb bottle can get into in the needle valve flow control assembly 7.

In the combined portable coffee machine, the air inflow is adjusted through the needle valve flow adjusting component 7, so that the air pressure in the water bin 3 is controlled; after hot water is filled in the water bin 3, the upper port is sealed by using the top cover, high-pressure gas is introduced, the high-pressure hot water is pushed open by the valve core of the one-way valve 4 under high pressure, the high-pressure hot water enters the extraction cylinder 1 to extract coffee powder on the coffee powder net 5 arranged in the extraction cylinder 1, and the obtained coffee liquid flows out from the bottom opening of the extraction cylinder 1.

In this embodiment, the pressurizing device includes a needle valve flow regulating assembly 7 disposed on the water sump 3, the needle valve flow regulating assembly 7 includes a needle valve seat 71 disposed on the water sump 3 and a needle valve core 72 inserted in a valve cavity of the needle valve seat 71, the needle valve core 72 is of a rotary structure, the needle valve core 72 is coaxially inserted in the needle valve seat 71, an adjusting sleeve 73 for driving the needle valve core 72 to axially move is disposed on the needle valve seat 71, and the air inlet port 727 is disposed at a rear end of the needle valve core 72; the adjusting sleeve 73 is connected with the needle valve seat 71 through threads, and when the adjusting sleeve 73 rotates, the needle valve core 72 can be driven to axially slide in the needle valve seat 71, so that a gap between the needle valve core 72 and the cavity wall of the valve cavity of the needle valve seat 71 is formed, and the air flow is controlled. When the needle valve seat 71 and the needle valve core 72 are horizontally arranged on one side of the water sump 3, an operator can fix the water sump 3 with one hand and rotate the adjusting sleeve 73 with the other hand to adjust the air pressure in the water sump 3, and the operation is convenient. The needle valve flow regulating assembly 7 is convenient to regulate air pressure, all parts forming the needle valve flow regulating assembly 7 are revolving bodies, air inflow regulation is achieved through rotating the regulating sleeve 73, the structural design is ingenious, the structure is compact, and air pressure regulation is accurate.

In the present embodiment, a tapered valve needle 721 is disposed at the front end of the needle valve core 72, a valve cavity adapted to the needle valve core 72 is disposed in the needle valve seat 71, the valve cavity includes a tapered hole 711 adapted to the tapered valve needle 721 at the front end of the needle valve core 72 and a guide hole 712 adapted to the rear end of the needle valve core 72, a fluid channel 722 extending to a tapered surface of the tapered valve needle 721 is disposed in the needle valve core 72, and an air inlet 727 is disposed at the rear end of the fluid channel 722; when the needle valve core 72 is driven by the adjusting sleeve 73 to move axially, the conical surface of the conical valve needle 721 can be tightly matched with the wall of the conical hole 711 of the needle valve seat 71 to close the fluid channel 722; the conical needle 721 can be slid outward so that the gap between the conical surface of the conical needle 721 and the wall of the conical hole 711 is gradually increased, thereby adjusting the amount of air flowing from the fluid passage 722.

The air inlet connector 727 is connected with a bottle opening connector, the air bomb bottle is arranged on the bottle opening connector through threads, a puncture needle punctures a sealing port of the air bomb bottle when the bottle opening connector is opened, and high-pressure air in the air bomb bottle can enter a valve cavity of the needle valve seat 71 and flows into the water sump 3 from the tapered hole 711; a high-pressure air pipe can also be connected at the air inlet interface 727.

The fluid passage 722 includes an axially extending axial passage provided at the center of the needle 72 and a radially extending radial passage provided on the sidewall of the needle 72 and communicating with the axial passage, and a communicating groove provided on the sidewall of the needle 72 and communicating with the radial passage is adapted to the tapered surface of the tapered needle 721.

In the present embodiment, the adjusting sleeve 73 is screwed with the needle valve seat 71, an axial limiting structure is provided between the adjusting sleeve 73 and the needle valve core 72, a positioning sleeve 74 is provided at the rear end of the adjusting sleeve 73, and a rotating sleeve 75 connected with the adjusting sleeve 73 is provided at the front end of the positioning sleeve 74. The adjusting sleeve 73 drives the needle valve core 72 to axially move through an axial limiting structure; two ends of the rotating sleeve 75 are respectively connected with the adjusting sleeve 73 and the positioning sleeve 74, and the rotating sleeve 75 can drive the adjusting sleeve 73 to rotate, namely, the adjusting sleeve 73, the positioning sleeve 74 and the rotating sleeve 75 can rotate synchronously. A positioning cavity 743 matched with the gas bomb bottle is arranged in the positioning sleeve 74, a rear cover 76 is arranged at the rear end of the positioning sleeve 74, and the gas bomb bottle is positioned and installed through the positioning cavity 743 and the rear cover 76 to protect the gas bomb bottle.

The adjusting sleeve 73 is provided with scale marks which are circumferentially arranged, and the needle valve seat 71 is provided with zero scale marks, so that the air inflow and the air pressure in the water sump 3 can be accurately adjusted through the scale marks and the zero scale marks.

In this embodiment, a first internal thread 741 connected to the adjusting sleeve 73 and a first external thread 742 connected to the rotating sleeve 75 are disposed at the front end of the positioning sleeve 74, a circumferential limiting structure is disposed between the rotating sleeve 75 and the adjusting sleeve 73, the inner wall and the outer wall of the positioning sleeve 74 are respectively in threaded connection with the adjusting sleeve 73 and the rotating sleeve 75, and the rotating sleeve 75 and the adjusting sleeve 73 are limited by the circumferential limiting structure, so that the adjusting sleeve 73, the positioning sleeve 74, and the rotating sleeve 75 can rotate synchronously.

In the present embodiment, the circumferential limiting structure includes a pin hole 751 provided in the rotary sleeve 75 and a first screw hole 731 provided in the adjusting sleeve 73 to fit into the pin hole 751. The first screw hole 731 is connected to a pin inserted into the pin hole 751.

The axial limiting structure comprises a second screw hole 733 formed in the outer wall of the adjusting sleeve 73 and a limiting groove 724 formed in the rear end of the needle valve core 72, the limiting groove 724 extends in the circumferential direction on the outer cylindrical surface of the needle valve core 72, the pin and the second screw hole 733 are inserted into the limiting groove 724, and the needle valve core 72 cannot be driven to rotate when the adjusting sleeve 73 is rotated.

In this embodiment, the rear end of the rotary sleeve 75 is provided with a second internal thread 752 adapted to the first internal thread 742, the pin hole 751 is provided at the front end of the rotary sleeve 75, the adjusting sleeve 73 is provided with a second external thread 732 adapted to the first internal thread 741, the first internal thread 741 and the second internal thread 752 have opposite threads, and the first external thread 742 and the second external thread 732 have opposite threads. Under the self-locking of opposite threads and the limiting of the circumferential limiting structure, the positioning sleeve 74 cannot axially move relative to the adjusting sleeve 73, so that an operator can adjust the air inflow by rotating the positioning sleeve 74 with a large length and size, and the positioning sleeve 74 is convenient to stress and operate.

In this embodiment, an installation groove 723 is formed in the outer wall of the needle valve element 72 and extends circumferentially around the axis, the installation groove 723 is located behind the outlet of the fluid channel 722, and a sealing ring adapted to the cavity wall of the needle valve seat 71 is installed on the installation groove 723.

A positioning step is arranged between the guide hole 712 and the tapered hole 711, a positioning shaft shoulder matched with the positioning step is arranged at the rear end of the tapered valve needle 721, a positioning part 725 is arranged at the rear end of the valve core 72, a limiting groove 724 is arranged at the outer side of the positioning part 725, and a positioning groove 726 communicated with the channel 722 is arranged in the positioning part 725. The front end surface of the positioning portion 725 can conform to the rear end surface of the needle valve seat 71.

The front end of the adjusting sleeve 73 is provided with a third internal thread 734 connected with the needle valve seat 71, and the rear end of the needle valve seat 71 is provided with a third external thread 713 matched with the third internal thread 734; the front end of the needle valve seat 71 is provided with a fourth external thread 714, a positioning step is arranged between the fourth external thread 714 and the third external thread 713, the front end of the positioning sleeve 74 is provided with a positioning step matched with the rear end surface of the rotating sleeve 75, and the maximum outer diameter of the positioning sleeve 74 is equal to the outer diameter of the rotating sleeve 75.

In this embodiment, the needle valve flow regulating assembly 7 further includes a through joint 77 capable of being connected with the needle valve seat 71, and a steering joint 78, two connecting screw holes perpendicular to each other are provided in the steering joint 78, an air gap for connecting the two connecting screw holes is provided between the two connecting screw holes, one end of the through joint 77 is provided with a connecting screw hole, the other end is provided with an external screw joint, and an air gap communicated with the connecting screw hole is provided on the other end surface of the through joint 77. The needle valve seat 71 can be horizontally arranged above the top cover of the water sump 3 through the steering joint 78, and the needle valve seat 71 can be horizontally arranged on the side wall of the water sump 3 through the through joint 77, so that the arrangement of the needle valve flow regulating assembly 7 is convenient.

In this embodiment, be equipped with a location section of thick bamboo 8 on the top cap of sump 3, be equipped with lug 9 on the inner wall of a location section of thick bamboo 8, be equipped with bayonet joint 10 in the section of thick bamboo 8 of location, be equipped with on the outer wall of bayonet joint 10 with the L type draw-in groove 11 of lug 9 looks adaptation, be equipped with the gas pocket on the bayonet joint 10, the top of gas pocket is equipped with manometer 12, is equipped with relief valve 2 on the top cap of sump 3. The plug 10 is inserted into the positioning cylinder 8 and then rotates, the L-shaped clamping groove 11 is clamped with the projection 9, and a sealing ring is arranged between the outer wall of the plug 1 and the inner wall of the positioning cylinder 8, so that the plug 10 is quickly installed on the positioning cylinder 8 and is convenient to disassemble and assemble; when hot water is added, the plug 10 can be taken out by rotating the plug 10 and pulling upwards, so that the hot water is added into the water bin 3 through the inner hole of the positioning cylinder 8.

In this embodiment, the pressurizing device further includes a mechanical pressurizing mechanism 6, the mechanical pressurizing mechanism 6 includes an air cylinder 61 disposed at the top of the water sump 3, the air cylinder 61 is connected with the water sump 3 through a thread, a piston 62 and a piston rod 63 are disposed in the air cylinder 61, a sliding sleeve 64 is disposed between the piston rod 63 and the inner wall of the air cylinder 61, an axial sliding slot 65 and a sliding pin 66 are disposed between the sliding sleeve 64 and the piston rod 63, an annular slot 610 communicated with the axial sliding slot 65 is disposed on the piston rod 63, a limit protruding edge 67 is disposed on the outer wall of the sliding sleeve 64, a limit ring 68 adapted to the limit protruding edge 67 is disposed at the top of the air cylinder 61, and a push-pull mechanism 69 connected.

The push-pull mechanism 69 pushes the piston rod 63 to cause the piston 62 to compress the air in the air cylinder 61, thereby increasing the air pressure in the sump 3.

The push-pull mechanism 69 is a scissor-type lifting mechanism, the scissor-type lifting mechanism includes a first hinge seat 691 disposed at the top end of the sliding sleeve 64 and a push-pull rod 692 passing through the first hinge seat 691 and connected with the piston rod 63, a second hinge seat 693 is disposed at the top end of the push-pull rod 692, connecting rods 694 are respectively disposed at two sides of the first hinge seat 691 and the second hinge seat 693 in a hinged manner, a third hinge seat 695 is disposed between the two connecting rods 694 at one side, a fourth hinge seat 696 is disposed between the two connecting rods 694 at the other side, a screw-nut mechanism 697 is disposed between the third hinge seat 695 and the fourth hinge seat 696, and a through groove 698 for a screw of the screw-nut mechanism 697 to pass through is disposed on the piston rod 63.

The first hinge seat 691 is sleeved on the top end of the sliding sleeve 64, the top end of the sliding sleeve 64 is provided with a limit nut 611 corresponding to the top surface of the first hinge seat 691, and the top end of the sliding sleeve 64 is provided with a limit step 612 corresponding to the bottom surface of the first hinge seat 691. The first hinge seat 691 is provided with a sleeve hole 699 adapted to the top end of the sliding sleeve 64. The first hinge seat 691 is mounted on the top end of the sliding sleeve 64, and is locked by the limit nut 611, and then the lead screw of the lead screw nut mechanism 697 is rotated to cause the connecting rods 694 on both sides to expand outwards or contract inwards, so as to drive the push-pull rod 692, and the push-pull rod 692 drives the piston rod 63.

The stroke of the push-pull rod 692 and the piston rod 63 can be controlled through the lead screw, so that the water quantity of the water bin 3 entering the extraction cylinder 1 is controlled, quantitative extraction is realized on the portable coffee machine through mechanical motion, the cost is low, the structure is simple, the application range is wide, the device can be applied to various pull rod type coffee machines, and the economy and the popularization are well unified.

The inlet end of the check valve 4 is provided with a water inlet connector 13, the top of the water inlet connector 13 is provided with a quantitative measuring pipe 14 capable of being adjusted up and down, the water inlet connector 13 and the quantitative measuring pipe 14 are positioned in the water bin 3, a first adjusting thread structure 15 is arranged between the top of the water inlet connector 13 and the quantitative measuring pipe 14, the bottom of the water inlet connector 13 is provided with a conical connector 16 connected with the inlet end of the check valve 4, an axial flow passage 17 axially extending from the upper end to the lower end and a radial flow passage 18 radially extending from the outer conical surface at the bottom of the conical connector 16 to the axial flow passage 17 are arranged in the water inlet connector 13, the inlet end of the check valve 4 is provided with a conical hole 19 matched with the outer conical surface of the conical connector 16, and a second adjusting thread structure 20 is arranged between the top of the conical connector. Can adjust quantitative buret 14's height through first regulation helicitic texture 15 to can adjust the hot water volume that hot water in the sump 3 flows to the extraction jar 1 of below through quantitative buret 14, water supply connector 13, check valve 4, thereby adjust the volume of extraction liquid, adjust conveniently, satisfy different extraction demands.

The gap between the hole wall of the inlet end conical hole 19 of the one-way valve 4 and the conical surface of the conical joint 16 can be adjusted through the second positioning thread structure 20, so that the size of a flow channel is adjusted, the flow rate of liquid is adjusted, and the adjustment of the flow rate is realized, so that different extraction requirements are met.

The above is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that several variations and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.

Claims

1. A combined portable coffee machine comprises an extraction cylinder (1), a water bin (3), a one-way valve (4) and a coffee powder net (5), and is characterized in that a pressurizing device is arranged on the water bin (3); the pressurizing device comprises a needle valve flow adjusting assembly (7) arranged on the water sump (3), and an air inlet interface (727) is arranged on the needle valve flow adjusting assembly (7).

2. A combined portable coffee machine according to claim 1, characterized in that said needle valve flow regulating assembly (7) comprises a needle valve seat (71) arranged on said water tank (3) and a needle valve core (72) inserted in a valve cavity of said needle valve seat (71), an adjusting sleeve (73) for driving said needle valve core (72) to move axially is arranged on said needle valve seat (71), and said air inlet port (727) is arranged at the rear end of said needle valve core (72).

3. The combined portable coffee machine according to claim 2, characterized in that the front end of the needle valve core (72) is provided with a conical valve needle (721), the needle valve seat (71) is internally provided with a valve cavity matched with the needle valve core (72), the needle valve core (72) is internally provided with a fluid channel (722) extending to the conical surface of the conical valve needle (721), and the air inlet interface (727) is arranged at the rear end of the fluid channel (722).

4. A combined portable coffee machine according to claim 2 or 3, characterized in that an axial limiting structure is arranged between the adjusting sleeve (73) and the needle valve core (72), a positioning sleeve (74) is arranged at the rear end of the adjusting sleeve (73), and a rotating sleeve (75) connected with the adjusting sleeve (73) is arranged at the front end of the positioning sleeve (74).

5. A combined portable coffee machine according to claim 4, characterized in that the front end of the positioning sleeve (74) is provided with a first internal thread (741) connected with the adjusting sleeve (73) and a first external thread (742) connected with the rotating sleeve (75), and a circumferential limit structure is provided between the rotating sleeve (75) and the adjusting sleeve (73).

6. A combined portable coffee machine according to claim 5, characterized in that the rear end of the rotary sleeve (75) is provided with a second internal thread (752) adapted to the first external thread (742), a pin hole (751) is provided at the front end of the rotary sleeve (75), the adjusting sleeve (73) is provided with a second external thread (732) adapted to the first internal thread (741), the first internal thread (741) has a thread with an opposite pitch to the second internal thread (752), and the first external thread (742) has a thread with an opposite pitch to the second external thread (732).

7. The combined portable coffee machine according to claim 5 or 6, characterized in that a positioning cylinder (8) is arranged on the top cover of the water tank (3), a projection (9) is arranged on the inner wall of the positioning cylinder (8), a plug connector (10) is arranged in the positioning cylinder (8), an L-shaped clamping groove (11) matched with the projection (9) is arranged on the outer wall of the plug connector (10), an air hole is arranged on the plug connector (10), and a pressure gauge (12) is arranged at the top end of the air hole.

8. The combined portable coffee machine according to claim 1, wherein the pressurizing device further comprises a mechanical pressurizing mechanism (6), the mechanical pressurizing mechanism (6) comprises an air cylinder (61) arranged at the top of the water sump (3), a piston (62) and a piston rod (63) are arranged in the air cylinder (61), a sliding sleeve (64) is arranged between the piston rod (63) and the inner wall of the air cylinder (61), an axial sliding groove (65) and a sliding pin (66) are arranged between the sliding sleeve (64) and the piston rod (63), a limiting convex edge (67) is arranged on the outer wall of the sliding sleeve (64), a limiting ring (68) corresponding to the limiting convex edge (67) is arranged at the top of the air cylinder (61), and a push-pull mechanism (69) connected with the piston rod (63) is arranged on the sliding sleeve (64).

9. A combined portable coffee machine according to claim 8, characterized in that said push-pull mechanism (69) is a scissor-lift mechanism, the scissor type lifting mechanism comprises a first hinge seat (691) arranged at the top end of the sliding sleeve (64) and a push-pull rod (692) connected with the piston rod (63) through the first hinge seat (691), a second hinged seat (693) is arranged at the top end of the push-pull rod (692), connecting rods (694) are hinged on two sides of the first hinged seat (691) and the second hinged seat (693), a third hinged seat (695) is arranged between the two connecting rods (694) on one side, a fourth hinged seat (696) is arranged between the two connecting rods (694) on the other side, a screw and nut mechanism (697) is arranged between the third hinging seat (695) and the fourth hinging seat (696), and a through groove (698) for a lead screw of the lead screw nut mechanism (697) to pass through is arranged on the piston rod (63).

10. A combined portable coffee machine according to claim 9, characterized in that the first hinged seat (691) is fitted over the top end of the sliding sleeve (64), the top end of the sliding sleeve (64) is provided with a limit nut (611) adapted to the top surface of the first hinged seat (691), and the top end of the sliding sleeve (64) is provided with a limit step (612) adapted to the bottom surface of the first hinged seat (691).