Combined portable coffee machine

Abstract

The present invention discloses a combined portable coffee machine, including an extraction cylinder, a water tank, a one-way valve and a coffee powder net, wherein a pressurizing device is provided on the water tank, wherein the pressurizing device includes a needle valve flow regulating assembly provided on the water tank, wherein the needle valve flow regulating assembly is provided with an air inlet interface; the pressurizing device also includes a mechanical pressing mechanism provided on the top of the water tank. The combined portable coffee machine of the present invention can quickly complete the assembly tooling and realize rapid disassembly and assembly, wherein the needle valve flow regulating assembly and the mechanical pressing mechanism can be quickly assembled on the coffee machine, and the installation is convenient, and the hot water in the water tank can be pressurized in different ways to meet different usage requirements.

Description

Technical Field

[0001] The present invention relates to an Italian coffee machine, and more particularly to a combined portable coffee machine. Background Art

[0002] The principle of an Italian coffee machine is to use a mixture of high-pressure steam and water to quickly pass through the coffee layer and extract the coffee instantly. The coffee that comes out in this way has a very high temperature, a very low content of impurities such as caffeine, and a rich taste.

[0003] In the prior art, portable coffee machines usually pressurize hot water by installing a high-pressure air pump in the coffee machine to apply high-pressure gas to the hot water in the coffee machine. However, such coffee machines are large in size and not easy to carry. Summary of the invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art, and an object of the present invention is to provide a combined portable coffee machine that is easy to assemble and easy to operate.

[0005] To achieve the above-mentioned purpose, the present invention provides a combined portable coffee machine, including an extraction cylinder, a water tank, a one-way valve and a coffee powder net, wherein the water tank is provided with a pressurizing device, the pressurizing device includes a needle valve flow regulating assembly arranged on the water tank, and the needle valve flow regulating assembly is provided with an air inlet interface.

[0006] Furthermore, the needle valve flow regulating assembly comprises a needle valve seat arranged on the water tank and a needle valve core inserted in a valve cavity of the needle valve seat, and the needle valve seat is provided with an adjusting sleeve for driving the needle valve core to move axially.

[0007] Furthermore, a conical valve needle is provided at the front end of the needle valve core, a valve cavity adapted to the needle valve core is provided in the needle valve seat, a fluid channel extending to the conical surface of the conical valve needle is provided in the needle valve core, and the air inlet interface is provided at the rear end of the fluid channel.

[0008] As a further improvement, an axial limiting structure is provided between the adjusting sleeve and the needle valve core, a positioning sleeve is provided at the rear end of the adjusting sleeve, and a rotating sleeve connected to the adjusting sleeve is provided at the front end of the positioning sleeve.

[0009] Furthermore, a front end of the positioning sleeve is provided with a first internal thread connected to the adjusting sleeve and a first external thread connected to the rotating sleeve, and a circumferential limiting structure is provided between the rotating sleeve and the adjusting sleeve.

[0010] Furthermore, the rear end of the rotating sleeve is provided with a second internal thread adapted to the first external thread, the pin hole is provided at the front end of the rotating sleeve, and the adjusting sleeve is provided with a second external thread adapted to the first internal thread, the thread teeth of the first internal thread and the second internal thread are opposite, and the thread teeth of the first external thread and the second external thread are opposite.

[0011] As a further improvement, a positioning cylinder is provided on the top cover of the water tank, a protrusion is provided on the inner wall of the positioning cylinder, a plug connector is provided in the positioning cylinder, an L-shaped slot matching the protrusion is provided on the outer wall of the plug connector, an air hole is provided on the plug connector, and a pressure gauge is provided at the top of the air hole.

[0012] As a further improvement, the pressurizing device also includes a mechanical pressurizing mechanism arranged on the top of the water tank, the mechanical pressurizing mechanism includes an air cylinder arranged on the top of the water tank, a piston and a piston rod are provided in the air cylinder, a sliding sleeve is provided between the piston rod and the inner wall of the air cylinder, an axial sliding groove and a sliding pin are provided between the sliding sleeve and the piston rod, a limiting convex edge is provided on the outer wall of the sliding sleeve, a limiting ring adapted to the limiting convex edge is provided on the top of the air cylinder, and a push-pull mechanism connected to the piston rod is provided on the sliding sleeve.

[0013] Furthermore, the push-pull mechanism is a scissors-type lifting mechanism, which includes a first hinged seat provided at the top of the sliding sleeve and a push-pull rod passing through the first hinged seat and connected to the piston rod, a second hinged seat is provided at the top of the push-pull rod, connecting rods are hinged on both sides of the first hinged seat and the second hinged seat, a third hinged seat is provided between the two connecting rods on one side, and a fourth hinged seat is provided between the two connecting rods on the other side, a screw-nut mechanism is provided between the third hinged seat and the fourth hinged seat, and a through groove is provided on the piston rod for the screw of the screw-nut mechanism to pass through.

[0014] Furthermore, the first articulated seat is sleeved on the top of the sliding sleeve, the top of the sliding sleeve is provided with a limiting nut adapted to the top surface of the first articulated seat, and the top of the sliding sleeve is provided with a limiting step adapted to the bottom surface of the first articulated seat.

[0015] Beneficial Effects

[0016] Compared with the prior art, the combined portable coffee machine of the present invention has the following beneficial effects:

[0017] (1) The combined portable coffee machine of the present invention, the needle valve flow regulating assembly and the mechanical pressing mechanism can be quickly assembled on the coffee machine, and the installation is convenient. The hot water in the water tank can be pressurized in different ways to meet different usage requirements;

[0018] (2) Moreover, the needle valve flow regulating assembly is convenient for regulating the air pressure. The components constituting the needle valve flow regulating assembly are all rotating bodies, and the air intake volume is also regulated by rotating the regulating sleeve. The structural design is ingenious, the structure is compact, and the air pressure can be regulated accurately.

[0019] (3) The combined portable coffee machine of the present invention can install a mechanical pressing mechanism on the water tank, and drive the piston rod through the screw transmission mechanism. The piston rod pushes the piston to compress the gas in the gas cylinder and the water tank, thereby realizing the pressing of hot water. The operation is simple, the structure is convenient to disassemble and assemble, and it is easy to carry. The stroke of the piston rod can be adjusted, that is, the amount of water entering the extraction cylinder from the water tank can be adjusted to realize quantitative extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the combined portable coffee machine of the present invention;

[0021] Figure 2 It is an enlarged schematic diagram of the structure of the needle valve flow regulating assembly in the present invention;

[0022] Figure 3 It is an enlarged cross-sectional view of the structure of the needle valve seat in the present invention;

[0023] Figure 4 It is an enlarged cross-sectional view of the structure of the needle valve core in the present invention;

[0024] Figure 5 It is an enlarged cross-sectional view of the structure of the adjustment sleeve in the present invention;

[0025] Figure 6 It is an enlarged cross-sectional view of the structure of the positioning sleeve in the present invention;

[0026] Figure 7 It is an enlarged cross-sectional view of the structure of the rotating sleeve in the present invention;

[0027] Figure 8 is an enlarged cross-sectional view of the structure of the back cover in the present invention;

[0028] Fig. 9 is an enlarged cross-sectional view of the structure of the straight-through joint in the present invention;

[0029] Fig.10 It is an enlarged schematic diagram of the structure of the steering joint in the present invention;

[0030] Fig.11 is an enlarged cross-sectional view of the structure of the steering joint in the present invention;

[0031] Fig.12 It is a structural cross-sectional view of the mechanical pressing mechanism in the present invention;

[0032] Fig.13 It is an enlarged schematic diagram of the structure of the push-pull mechanism in the present invention;

[0033] Fig.14 It is an enlarged schematic diagram of the structure of the push-pull rod in the present invention;

[0034] Fig.15 It is an enlarged top view of the structure of the first hinged seat in the present invention;

[0035] Fig.16 It is an enlarged cross-sectional view of the structure of the one-way valve connected with the water inlet joint and the quantitative measuring tube in the present invention;

[0036] Fig.17 It is an enlarged cross-sectional view of the structure of the water inlet joint in the present invention.

[0037] In the figure: 1, extraction cylinder; 2, safety valve; 3, water tank; 4, non-return valve; 5, coffee powder net; 6, mechanical pressing mechanism; 61, gas cylinder; 62, piston; 63, piston rod; 64, sliding sleeve; 65, axial sliding groove; 66, sliding pin; 67, limiting convex edge; 68, limiting ring; 69, push-pull mechanism; 691, first hinge seat; 692, push-pull rod; 693, second hinge seat; 694, connecting rod; 695, third hinge seat; 696, fourth hinge seat; 697, lead screw nut mechanism; 698, through groove; 699, sleeve hole; 610, annular groove; 611, limit nut; 612, limit step; 7, needle valve flow adjustment assembly; 71, needle valve seat; 711, tapered hole; 712, guide hole; 72, third external thread; 714, third internal thread; 72, needle valve core; 721, tapered valve needle; 722, tapered valve needle; 723, mounting groove; 724, limit groove; 725, positioning part; 726, positioning groove; 727, air inlet interface; 73, adjusting sleeve; 731, first screw hole; 732, second external thread; 733, second screw hole; 734, third internal thread; 74, positioning sleeve; 741, first internal thread; 742, first external thread; 743, positioning cavity; 75, rotating sleeve; 751, pin hole; 752, second internal thread; 76, back cover; 77, straight-through joint; 78, steering joint; 8, positioning cylinder; 9, bump; 10, plug joint; 11, L-shaped slot; 12, pressure gauge; 13, water inlet joint; 14, quantitative measuring tube; 15, first adjusting thread structure; 16, tapered joint; 17, axial flow channel; 18, radial flow channel; 19, tapered hole; 20, second adjustment thread structure. DETAILED DESCRIPTION

[0038] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0039] The specific implementation of the present invention is as follows: Figure 1-17As shown, a combined portable coffee machine includes an extraction cylinder 1, a water tank 3, a one-way valve 4 and a coffee powder net 5, the extraction cylinder 1 is installed on the bottom end of the water tank 3 by means of threads, the coffee powder net 5 is placed in the extraction cylinder 1 and is sealed and connected; a pressurizing device is provided on the water tank 3, the pressurizing device includes a detachable needle valve flow regulating assembly 7 arranged on the water tank 3, the needle valve flow regulating assembly 7 is provided with an air inlet interface 727, the air inlet interface 727 can be connected to a high-pressure pump air pipe or a gas cartridge, wherein when the gas cartridge is connected, a bottle opening joint can be installed at the air inlet interface 727, a puncture needle is provided in the bottle opening joint, when the gas cartridge is installed on the bottle opening joint by means of threads, the puncture needle punctures the sealing mouth of the gas cartridge, and the high-pressure gas in the gas cartridge can enter the needle valve flow regulating assembly 7.

[0040] In the combined portable coffee machine, the air intake is adjusted by the needle valve flow regulating assembly 7, so as to control the air pressure in the water tank 3; after hot water is filled in the water tank 3, the upper port is sealed by the top cover, and after the 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, and the high-pressure hot water enters the extraction cylinder 1 to extract the coffee powder on the coffee powder net 5 installed in the extraction cylinder 1, and the obtained coffee liquid flows out from the bottom opening of the extraction cylinder 1.

[0041] In this embodiment, the pressurizing device includes a needle valve flow regulating assembly 7 arranged on the water tank 3, and the needle valve flow regulating assembly 7 includes a needle valve seat 71 arranged on the water tank 3 and a needle valve core 72 inserted in the valve cavity of the needle valve seat 71. The needle valve core 72 is a rotating body structure, and the needle valve core 72 is coaxially inserted in the needle valve seat 71. The needle valve seat 71 is provided with an adjusting sleeve 73 for driving the needle valve core 72 to move axially, and the air inlet interface 727 is arranged at the rear end of the needle valve core 72; the adjusting sleeve 73 is connected to the needle valve seat 71 through a thread, and when the adjusting sleeve 73 rotates, it can drive the needle valve core 72 to slide axially in the needle valve seat 71, so as to control the gap between the needle valve core 72 and the cavity wall of the valve cavity of the needle valve seat 71, thereby controlling the air flow. When the needle valve seat 71 and the needle valve core 72 are arranged horizontally on one side of the water tank 3, the operator can fix the water tank 3 with one hand and rotate the adjusting sleeve 73 with the other hand to adjust the air pressure in the water tank 3, which is convenient to operate. The needle valve flow regulating assembly 7 is convenient for regulating the air pressure. The components constituting the needle valve flow regulating assembly 7 are all rotating bodies, and the air intake volume is also regulated by rotating the regulating sleeve 73. The structural design is ingenious, the structure is compact, and the air pressure can be precisely regulated.

[0042] In this embodiment, a conical valve needle 721 is provided at the front end of the needle valve core 72, and a valve cavity adapted to the needle valve core 72 is provided in the needle valve seat 71, the valve cavity includes a conical hole 711 adapted to the conical 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, and a fluid channel 722 extending to the conical surface of the conical valve needle 721 is provided in the needle valve core 72, and an air inlet interface 727 is provided at the rear end of the fluid channel 722; when the needle valve core 72 is driven to move axially by the adjusting sleeve 73, 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 valve needle 721 can also be slid outward so that the gap between the conical surface of the conical valve needle 721 and the wall of the conical hole 711 can gradually increase, thereby adjusting the amount of air intake flowing in from the fluid channel 722.

[0043] The air inlet interface 727 is connected to the bottle opener. When the gas bottle is installed on the bottle opener through a thread, the puncture needle punctures the sealing mouth of the gas bottle, and the high-pressure gas in the gas bottle can enter the valve cavity of the needle valve seat 71 and flow into the water tank 3 from the tapered hole 711; the air inlet interface 727 can also be connected to a high-pressure air pipe.

[0044] The fluid channel 722 includes an axial channel extending axially at the center of the needle valve core 72 and a radial channel extending radially and connected to the axial channel on the side wall of the needle valve core 72. A connecting groove connected to the radial channel is provided on the side wall of the needle valve core 72, and the connecting groove is adapted to the conical surface of the conical valve needle 721.

[0045] In this embodiment, the adjusting sleeve 73 is threadedly connected to 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 to 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 move axially through the axial limiting structure; the two ends of the rotating sleeve 75 are respectively connected to the adjusting sleeve 73 and the positioning sleeve 74, and rotating the rotating sleeve 75 can drive the adjusting sleeve 73 to rotate, that is, the adjusting sleeve 73, the positioning sleeve 74 and the rotating sleeve 75 can rotate synchronously. A positioning cavity 743 adapted to the gas bomb bottle is provided in the positioning sleeve 74, and a rear cover 76 is provided at the rear end of the positioning sleeve 74. The gas bomb bottle is positioned and installed through the positioning cavity 743 and the rear cover 76 to protect the gas bomb bottle.

[0046] The adjusting sleeve 73 is provided with circumferentially arranged scale lines, and the needle valve seat 71 is provided with a zero scale line, so that the air intake volume and the air pressure in the water tank 3 can be accurately adjusted through the scale lines and the zero scale line.

[0047] In this embodiment, the front end of the positioning sleeve 74 is provided with a first internal thread 741 connected to the adjusting sleeve 73 and a first external thread 742 connected to the rotating sleeve 75. A circumferential limiting structure is provided between the rotating sleeve 75 and the adjusting sleeve 73. The inner wall and the outer wall of the positioning sleeve 74 are threadedly connected to the adjusting sleeve 73 and the rotating sleeve 75 respectively. By limiting the rotating sleeve 75 and the adjusting sleeve 73 through the circumferential limiting structure, the synchronous rotation of the adjusting sleeve 73, the positioning sleeve 74 and the rotating sleeve 75 can be achieved.

[0048] In this embodiment, the circumferential limiting structure includes a pin hole 751 provided on the rotating sleeve 75 and a first screw hole 731 provided on the adjusting sleeve 73 and adapted to the pin hole 751. A pin is inserted into the pin hole 751 and connected to the first screw hole 731.

[0049] The axial limiting structure includes a second screw hole 733 provided on the outer wall of the adjusting sleeve 73 and a limiting groove 724 provided at the rear end of the needle valve core 72. The limiting groove 724 is circumferentially extended on the outer cylindrical surface of the needle valve core 72. The pin is inserted into the limiting groove 724 through the second screw hole 733. When the adjusting sleeve 73 is rotated, the needle valve core 72 will not be driven to rotate.

[0050] In this embodiment, the rear end of the rotating sleeve 75 is provided with a second internal thread 752 adapted to the first external thread 742, the pin hole 751 is provided at the front end of the rotating sleeve 75, and 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 screw threads, and the first external thread 742 and the second external thread 732 have opposite screw threads. When the positioning sleeve 74 is rotated forward / reversely, under the self-locking of the opposite screw threads and the limitation of the circumferential limiting structure, the positioning sleeve 74 will not move relative to the adjusting sleeve 73 in the axial direction, so that the operator can adjust the air intake by rotating the positioning sleeve 74 with a larger length, which is convenient for force and operation.

[0051] In this embodiment, a mounting groove 723 extending circumferentially around the axis is provided on the outer wall of the needle valve core 72 . The mounting groove 723 is located at the rear side of the outlet of the fluid channel 722 . A sealing ring adapted to the cavity wall of the needle valve seat 71 is installed on the mounting groove 723 .

[0052] A positioning step is provided between the guide hole 712 and the tapered hole 711, a positioning shoulder adapted to the positioning step is provided at the rear end of the tapered valve needle 721, a positioning portion 725 is provided at the rear end of the needle valve core 72, a limiting groove 724 is provided on the outside of the positioning portion 725, and a positioning groove 726 communicating with the channel 722 is provided in the positioning portion 725. The front end surface of the positioning portion 725 can be adapted to the rear end surface of the needle valve seat 71.

[0053] The front end of the adjusting sleeve 73 is provided with a third internal thread 734 connected to 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, and a positioning step is provided between the fourth external thread 714 and the third external thread 713, and the front end of the positioning sleeve 74 is provided with a positioning step adapted to 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.

[0054] In this embodiment, the needle valve flow regulating assembly 7 further includes a straight joint 77 and a steering joint 78 that can be connected to the needle valve seat 71. The steering joint 78 is provided with two connecting screw holes that are perpendicular to each other, and an air gap connecting the two connecting screw holes is provided between the two connecting screw holes. One end of the straight joint 77 is provided with a connecting screw hole, and the other end is provided with an external threaded joint. An air gap connected to the connecting screw hole is provided on the other end surface of the straight joint 77. The needle valve seat 71 can be horizontally installed above the top cover of the water tank 3 through the steering joint 78, and the needle valve seat 71 can be horizontally installed on the side wall of the water tank 3 through the straight joint 77, which is convenient for the arrangement of the needle valve flow regulating assembly 7.

[0055] In this embodiment, a positioning cylinder 8 is provided on the top cover of the water tank 3, a convex block 9 is provided on the inner wall of the positioning cylinder 8, a plug connector 10 is provided in the positioning cylinder 8, an L-shaped card slot 11 matching the convex block 9 is provided on the outer wall of the plug connector 10, an air hole is provided on the plug connector 10, a pressure gauge 12 is provided at the top of the air hole, and a safety valve 2 is provided on the top cover of the water tank 3. The plug connector 10 is inserted into the positioning cylinder 8 and then rotated, and the L-shaped card slot 11 is engaged with the convex block 9, and a sealing ring is provided between the outer wall of the plug connector 1 and the inner wall of the positioning cylinder 8, so that the plug connector 10 can be quickly installed on the positioning cylinder 8, and it is convenient to disassemble and assemble; when adding hot water, the plug connector 10 can be taken out by rotating it and then pulling it upward, so that hot water can be added to the water tank 3 through the inner hole of the positioning cylinder 8.

[0056] In this embodiment, the pressurizing device also includes a mechanical pressurizing mechanism 6, which includes an air cylinder 61 arranged on the top of the water tank 3, the air cylinder 61 is connected to the water tank 3 through a thread, 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, an annular groove 610 connected to the axial sliding groove 65 is arranged on the piston rod 63, a limiting convex edge 67 is arranged on the outer wall of the sliding sleeve 64, a limiting ring 68 adapted to the limiting convex edge 67 is arranged on the top of the air cylinder 61, and a push-pull mechanism 69 connected to the piston rod 63 is arranged on the sliding sleeve 64.

[0057] The push-pull mechanism 69 pushes the piston rod 63 , causing the piston 62 to compress the air in the air cylinder 61 , thereby increasing the air pressure in the water tank 3 .

[0058] The push-pull mechanism 69 is a scissors-type lifting mechanism, which includes a first hinged seat 691 provided at the top of the sliding sleeve 64 and a push-pull rod 692 passing through the first hinged seat 691 and connected to the piston rod 63, a second hinged seat 693 is provided at the top of the push-pull rod 692, connecting rods 694 are hinged on both sides of the first hinged seat 691 and the second hinged seat 693, a third hinged seat 695 is provided between the two connecting rods 694 on one side, a fourth hinged seat 696 is provided between the two connecting rods 694 on the other side, a screw nut mechanism 697 is provided between the third hinged seat 695 and the fourth hinged seat 696, and a through groove 698 is provided on the piston rod 63 for the screw of the screw nut mechanism 697 to pass through.

[0059] The first hinge seat 691 is sleeved on the top of the sliding sleeve 64. The top of the sliding sleeve 64 is provided with a limit nut 611 adapted to the top surface of the first hinge seat 691. The top of the sliding sleeve 64 is provided with a limit step 612 adapted 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 of the sliding sleeve 64. The first hinge seat 691 is installed on the top of the sliding sleeve 64, locked by the limit nut 611, and then the lead screw of the lead screw nut mechanism 697 is rotated to make the connecting rods 694 on both sides open outward or contract inward, thereby driving the push-pull rod 692, and the push-pull rod 692 drives the piston rod 63.

[0060] The stroke of the push-pull rod 692 and the piston rod 63 can be controlled by the lead screw, thereby controlling the amount of water from the water tank 3 entering the extraction cylinder 1, and realizing quantitative extraction on a portable coffee machine through mechanical movement. The cost is low, the structure is simple, the adaptability is wide, and it can be applied to various pull-rod coffee machines, thus achieving a good balance between economy and promotion.

[0061] A water inlet joint 13 is provided at the inlet end of the one-way valve 4, and a quantitative measuring tube 14 which can be adjusted up and down is provided at the top of the water inlet joint 13. The water inlet joint 13 and the quantitative measuring tube 14 are located in the water tank 3, and a first adjusting thread structure 15 is provided between the top of the water inlet joint 13 and the quantitative measuring tube 14. A conical joint 16 connected to the inlet end of the one-way valve 4 is provided at the bottom of the water inlet joint 13. An axial flow channel 17 axially extending from the upper end to the lower end and a radial flow channel 18 radially extending from the outer cone surface at the bottom of the conical joint 16 to the axial flow channel 17 are provided inside the water inlet joint 13. A conical hole 19 adapted to the outer cone surface of the conical joint 16 is provided at the inlet end of the one-way valve 4, and a second adjusting thread structure 20 is provided between the top of the conical joint 16 and the inlet end of the one-way valve 4. The height of the quantitative measuring tube 14 can be adjusted through the first adjusting thread structure 15, so that the amount of hot water in the water tank 3 flowing into the extraction cylinder 1 below through the quantitative measuring tube 14, the water inlet joint 13, and the one-way valve 4 can be adjusted, thereby adjusting the amount of the extraction liquid, which is convenient to adjust and meets different extraction requirements.

[0062] The second adjusting thread structure 20 can be used to adjust the gap between the hole wall of the tapered hole 19 at the inlet end of the one-way valve 4 and the tapered surface of the tapered joint 16, thereby adjusting the size of the flow channel and thus adjusting the liquid flow rate, thereby achieving flow rate adjustment to meet different extraction requirements.

[0063] The above are only preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements 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 practicality of the patent.

Claims

1. A combined portable coffee machine, comprising an extraction cylinder (1), a water tank (3), a one-way valve (4) and a coffee powder net (5), characterized in that: The water tank (3) is provided with a pressurizing device; the pressurizing device comprises a needle valve flow regulating assembly (7) arranged on the water tank (3); the needle valve flow regulating assembly (7) is provided with an air inlet interface (727); the needle valve flow regulating assembly (7) comprises a needle valve seat (71) arranged on the water tank (3) and a needle valve core (72) inserted in a valve cavity of the needle valve seat (71); the needle valve seat (71) is provided with an adjusting sleeve (73) for driving the needle valve core (72) to move axially ), the air inlet interface (727) is arranged at the rear end of the needle valve core (72), the front end of the needle valve core (72) is provided with a conical valve needle (721), the needle valve seat (71) is provided with a valve cavity adapted to the needle valve core (72), the needle valve core (72) is provided with a fluid channel (722) extending to the conical surface of the conical valve needle (721), the air inlet interface (727) is arranged at the rear end of the fluid channel (722), the adjustment sleeve (73) and the needle valve core (7 2), an axial limiting structure is provided between the adjusting sleeve (73), a positioning sleeve (74) is provided at the rear end of the adjusting sleeve (73), a rotating sleeve (75) connected to the adjusting sleeve (73) is provided at the front end of the positioning sleeve (74), a first internal thread (741) connected to the adjusting sleeve (73) and a first external thread (742) connected to the rotating sleeve (75) are provided at the front end of the positioning sleeve (74), a circumferential limiting structure is provided between the rotating sleeve (75) and the adjusting sleeve (73), The rear end of the rotating sleeve (75) is provided with a second internal thread (752) adapted to the first external thread (742), the pin hole (751) is provided at the front end of the rotating 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 screw threads, and the first external thread (742) and the second external thread (732) have opposite screw threads; The inlet end of the one-way valve (4) is provided with a water inlet joint (13), the top of the water inlet joint (13) is provided with a quantitative measuring tube (14) which can be adjusted up and down, the water inlet joint (13) and the quantitative measuring tube (14) are located in the water tank (3), a first adjusting thread structure (15) is provided between the top of the water inlet joint (13) and the quantitative measuring tube (14), the bottom of the water inlet joint (13) is provided with a conical joint (16) connected to the inlet end of the one-way valve (4), an axial flow channel (17) axially extending from the upper end to the lower end and a radial flow channel (18) radially extending from the outer conical surface of the bottom of the conical joint (16) to the axial flow channel (17) are provided inside the water inlet joint (13), a conical hole (19) adapted to the outer conical surface of the conical joint (16) is provided at the inlet end of the one-way valve (4), and a second adjusting thread structure (20) is provided between the top of the conical joint (16) and the inlet end of the one-way valve (4).

2. A combined portable coffee machine according to claim 1, characterized in that: A positioning cylinder (8) is provided on the top cover of the water tank (3), a convex block (9) is provided on the inner wall of the positioning cylinder (8), a plug connector (10) is provided in the positioning cylinder (8), an L-shaped slot (11) matching the convex block (9) is provided on the outer wall of the plug connector (10), an air hole is provided on the plug connector (10), and a pressure gauge (12) is provided at the top end of the air hole.

3. A combined portable coffee machine according to claim 1, characterized in that: The pressurizing device also includes a mechanical pressing mechanism (6), which includes an air cylinder (61) arranged at the top of the water tank (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) adapted to the limiting convex edge (67) is arranged at the top of the air cylinder (61), and a push-pull mechanism (69) connected to the piston rod (63) is arranged on the sliding sleeve (64).

4. A combined portable coffee machine according to claim 3, characterized in that: The push-pull mechanism (69) is a scissor-type lifting mechanism, which includes a first hinge seat (691) provided at the top end of the sliding sleeve (64) and a push-pull rod (692) passing through the first hinge seat (691) and connected to the piston rod (63); a second hinge seat (693) is provided at the top end of the push-pull rod (692); connecting rods (694) are hingedly provided on both sides of the first hinge seat (691) and the second hinge seat (693); a third hinge seat (695) is provided between the two connecting rods (694) on one side; a fourth hinge seat (696) is provided between the two connecting rods (694) on the other side; a screw nut mechanism (697) is provided between the third hinge seat (695) and the fourth hinge seat (696); and a through groove (698) is provided on the piston rod (63) for the screw of the screw nut mechanism (697) to pass through.

5. A combined portable coffee machine according to claim 4, characterized in that: The first articulated seat (691) is sleeved on the top of the sliding sleeve (64), and the top of the sliding sleeve (64) is provided with a limiting nut (611) adapted to the top surface of the first articulated seat (691), and the top of the sliding sleeve (64) is provided with a limiting step (612) adapted to the bottom surface of the first articulated seat (691).

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