Gas cylinder type coffee machine

Abstract

The invention discloses a gas cylinder type coffee machine which comprises a main machine, a puncturing system, a gas path system and a gas cylinder, the main machine comprises a water bin and a coffee extraction bin which are communicated through a one-way valve mechanism, the puncturing system is matched with the gas cylinder and used for puncturing the gas cylinder, and the input end of the gas path system is communicated with the gas output end of the puncturing system; the output end of the gas path system communicates with the water sump, and after puncturing, gas in the gas cylinder enters the gas path system and can be conveyed to the water sump. The gas cylinder type coffee machine integrates an automatic puncturing structure, a pressure reduction structure, a balance valve structure and a pressure relief structure, and is high in functionality, simple and attractive in overall appearance, small in size and small in occupied space.

Description

Technical Field

[0001] The present invention relates to the technical field of daily necessities, and particularly relates to a gas cylinder type coffee machine. Background Art

[0002] At present, coffee machines on the market are mainly divided into two categories according to the pressurization principle: active pressurization and passive pressurization. Different principles directly affect the extraction effect and applicable scenarios of coffee.

[0003] Active pressurization type coffee machines are mainly divided into the following types: 1. Pump pressure type (high-pressure extraction), the principle is to actively apply pressure through an electric pump or a piston device, forcing hot water to quickly pass through the coffee powder layer. The representatives are semi-automatic / full-automatic coffee machines and capsule coffee machines, etc.; 2. Manual pneumatic type, the principle is to generate pressure through manual operation (such as piston pressing down, steam expansion), and the representative model is the moka pot; 3. Steam type, the principle is to use high-temperature steam expansion to generate pressure, and the representative is the steam coffee machine.

[0004] Passive pressurization type coffee machines are mainly divided into the following types: 1. Drip filter type (gravity-driven), the principle is that hot water naturally penetrates the coffee powder by gravity; 2. Siphon type (vacuum principle), the principle is that the water expands and rises when heated at the bottom, mixes with the coffee powder and then cools to form a vacuum, and the liquid falls back; 3. French press (soaking + filtering), the principle is that the coffee powder is soaked and then filtered with a filter screen.

[0005] The above-mentioned active pressurization type coffee machines have the disadvantage of large volume, while the passive pressurization type coffee machines have the disadvantages of being unable to pressurize and unable to bring out the mellow flavor of coffee. There appears a portable coffee machine of a gas cartridge type or a gas cylinder type on the market. Its principle is to release high-pressure gas from a gas cylinder to push hot water through the coffee powder. It does not need to use a pump or a piston device, so it has the advantage of small volume. At the same time, it can provide the air pressure required for extraction and can extract the fragrance of coffee.

[0006] However, the gas source of the existing coffee machines comes from a gas cylinder, and the high-pressure gas stored in the gas cylinder needs to be decompressed before use. However, the gas decompression mechanism used in the existing coffee machines is generally set independently of the coffee machine, that is, the coffee machine is connected to the gas decompression mechanism involved in patents such as the patent No. CN204062068U, CN205654929U, etc. in an external connection manner. Therefore, although the coffee machine has a small volume, the overall coffee machine after connecting the external gas decompression mechanism has the disadvantages of large volume, unattractive appearance, and inability to integrate with the coffee machine, etc.;

[0007] In addition, the gas cylinder used in the existing coffee machines needs to pierce the bottle mouth before the gas can be output, and the existing piercing method is generally realized by manually rotating the gas cylinder, that is, it is pierced during the process of installing the gas cylinder, and there are problems such as troublesome manual operation and easy gas leakage caused by improper operation. Summary of the Invention

[0008] An object of the present invention is to provide a gas cylinder type coffee machine, which can at least solve one of the above problems.

[0009] According to one aspect of the present invention, there is provided a gas cylinder type coffee machine, including a main body, a puncturing system, a gas circuit system and a gas cylinder. The main body includes a water tank and a coffee extraction chamber communicated through a one-way valve mechanism. The puncturing system cooperates with the gas cylinder and is used to puncture the gas cylinder. The input end of the gas circuit system is communicated with the gas output end of the puncturing system, and the output end of the gas circuit system is communicated to the water tank. After puncturing, the gas in the gas cylinder enters the gas circuit system and can be transported to the water tank;

[0010] The puncturing system includes a mounting frame, a gas cylinder positioning mechanism, a driving mechanism and a puncturing mechanism. The gas cylinder positioning mechanism includes a fifth mounting groove for limiting and cooperating with the gas cylinder. The driving mechanism is used to drive the gas cylinder to lift and translate. The puncturing mechanism cooperates with the gas cylinder and is used to puncture the gas cylinder;

[0011] The gas circuit system includes a high-pressure pipeline, a gas pressure reducing mechanism and a low-pressure pipeline;

[0012] The input end of the high-pressure pipeline is connected to the gas output end of the puncturing system, and the output end is connected to the high-pressure chamber of the gas pressure reducing mechanism. The low-pressure chamber of the gas pressure reducing mechanism is connected to the input end of the low-pressure pipeline, and the output end of the low-pressure pipeline is communicated to the water tank.

[0013] In some embodiments, the driving mechanism includes a lifting driving component and a horizontal driving component. The lifting driving component is connected to the gas cylinder positioning mechanism and is used to drive the gas cylinder to lift in the height direction. The horizontal driving component cooperates with the gas cylinder and is used to drive the gas cylinder to translate in the horizontal direction;

[0014] The lifting driving component includes a first driving member, a first transmission module and a movable frame. The movable frame is movably installed on the mounting frame. The first driving member is installed on the mounting frame and is in transmission connection with the first transmission module. The first transmission module is connected to the movable frame, and the movable frame is connected to the gas cylinder positioning mechanism;

[0015] The horizontal driving component includes a second driving member, a second transmission module and a top cylinder. The second driving member is in transmission connection with the second transmission module. The second transmission module is connected to the top cylinder, and the top cylinder cooperates with the gas cylinder.

[0016] In some embodiments, the gas cylinder positioning mechanism includes an outer bracket and an inner bracket. The outer bracket is provided with a cavity and is respectively connected to the puncturing mechanism and the horizontal driving component. The inner bracket is sleeved inside the outer bracket and the bottom is connected to the movable frame. The top of the inner bracket is provided with a first profiling groove for limiting and cooperating with the gas cylinder. The first profiling groove and the outer bracket jointly enclose to form a fifth mounting groove;

[0017] The inner bracket includes a top block, a supporting seat, a fourth spring and a guide pin. The top block is movably installed above the supporting seat and guided by the guide pin. A first limiting groove is formed at the bottom of the top block. The fourth spring is installed in the first limiting groove and abuts against the top block and the supporting seat respectively.

[0018] The puncturing mechanism includes a second mounting seat, a puncturing needle and an output pipe. The second mounting seat is provided with a through hole adapted to the mouth of the gas cylinder. The puncturing needle is installed in the second mounting seat and its head extends into the through hole. The first end of the output pipe extends into the second mounting seat, and the second end is connected to a high-pressure pipeline. An air passage is formed in the center of the puncturing needle, and the air passage is communicated with the output pipe.

[0019] In some embodiments, the gas pressure reducing mechanism includes a first valve seat, a valve rod, an air inlet nozzle, a floating plugging assembly and an adjusting knob. A high-pressure chamber and a low-pressure chamber are formed in the first valve seat. The air inlet nozzle is installed in the first valve seat and separates the high-pressure chamber and the low-pressure chamber. An air inlet passage is formed in the air inlet nozzle, and an air hole is provided at the end of the air inlet passage. The valve rod is sleeved on the first valve seat. The floating plugging assembly is installed at the first end of the valve rod and cooperates with the outlet end of the air hole. The floating plugging assembly can always keep elastic contact with the air inlet nozzle. The adjusting knob is installed at the second end of the valve rod and can drive the valve rod to rotate.

[0020] In some embodiments, the floating plugging assembly includes a floating rod and an elastic member. One end of the floating rod is movably sleeved on the valve rod, and the other end cooperates with the air hole. The elastic member is sleeved on the outer periphery of the floating rod and abuts against the valve rod and the floating rod respectively at both ends. Under the action of the elastic member, the floating rod always keeps elastic contact with the air inlet nozzle.

[0021] In some embodiments, the gas pressure reducing mechanism further includes a bearing. A third limiting boss is formed at one end of the floating rod away from the valve rod. The third limiting boss is movably installed in the low-pressure chamber and cooperates with the air hole. The bearing is installed at the end of the valve rod away from the adjusting knob and sleeved on the outer periphery of the floating rod. The first end of the elastic member abuts against the third limiting boss, and the second end abuts against the bearing.

[0022] In some embodiments, the main body further includes a fixing seat, a powder bowl, a third mounting seat and a third sealing ring. The fixing seat is arranged at the bottom of the water tank. The third mounting seat is arranged at the bottom of the fixing seat and is detachably connected to the fixing seat. The third sealing ring is sleeved on the fixing seat. The powder bowl is sleeved in the third mounting seat and can be pressed by the third mounting seat against the third sealing ring. The powder bowl is used for containing coffee powder. A coffee extraction chamber is formed jointly between the powder bowl and the fixing seat. An air inlet pipe is installed on the fixing seat. The first end of the air inlet pipe is communicated with the output end of the low-pressure pipeline, and the second end penetrates through the water tank and extends to the top position inside the water tank.

[0023] In some embodiments, the host further includes a balance valve mechanism. The one-way valve mechanism is formed with a first passage communicating the water tank and the coffee extraction chamber, and the balance valve mechanism is formed with a second passage communicating the water tank and the coffee extraction chamber. The one-way valve mechanism and the balance valve mechanism are arranged in opposite directions.

[0024] In some embodiments, the one-way valve mechanism includes a first fastener, and a first valve needle, a first sealing ring, a first spring, and a first connector sequentially arranged in a first direction. The first fastener is installed in the water tank and connected to the fixed seat. The first valve needle is movably installed in the fixed seat. The first sealing ring is sleeved on the outer periphery of the first valve needle and is in sealing cooperation with the fixed seat. The first connector is installed on the fixed seat. The first spring is sleeved on one end of the first valve needle close to the first connector and abuts against the first connector. Under the action of the first spring, the first valve needle elastically contacts the fixed seat through the first sealing ring.

[0025] The balance valve mechanism includes a second fastener, and a second valve needle, a second sealing ring, a second spring, and a second connector sequentially arranged in a second direction. The second direction is opposite to the first direction. The second fastener is installed in the water tank and connected to the fixed seat. The second valve needle is movably installed in the second fastener. The second sealing ring is sleeved on the outer periphery of the second valve needle and is in sealing cooperation with the second fastener. The second connector is installed in the second fastener. The second spring is sleeved on one end of the second valve needle close to the second connector and abuts against the second connector. Under the action of the second spring, the second valve needle elastically contacts the second fastener through the second sealing ring.

[0026] In some embodiments, the gas cylinder type coffee machine further includes a first casing, a second casing, and a base. The base contacts the external installation surface. The first casing is installed on the upper end surface of the base and extends vertically upward from the base. The second casing is installed on one side surface of the first casing and extends horizontally perpendicular to the first casing. The host is installed through the second casing and is parallel to the first casing. The gas cylinder is installed in the puncturing system, and the puncturing system is installed in the first casing.

[0027] In some embodiments, the gas cylinder type coffee machine further includes an electric control system. The electric control system includes a display screen, a control circuit board, and a battery. The gas path system further includes a high-pressure sensor and a low-pressure sensor. The high-pressure sensor is matched with the high-pressure pipeline for detecting the air pressure value of the high-pressure gas in the high-pressure pipeline. The low-pressure sensor is matched with the low-pressure pipeline for detecting the air pressure value of the low-pressure gas in the low-pressure pipeline. The control circuit board and the battery are installed in the first casing. The display screen is installed on the surface of the first casing and can at least be used to display the high-pressure sensor and the low-pressure sensor. The control circuit board is electrically connected to the battery, the display screen, the high-pressure sensor, the low-pressure sensor, and the puncturing system.

[0028] Advantages of the present invention:

[0029] 1. The gas cylinder type coffee machine of the present invention integrates an automatic puncturing structure, a pressure reducing structure, a balance valve structure, and a pressure relief structure. It not only has strong functionality, but also has a simple and beautiful overall appearance, small volume, and small space occupation;

[0030] 2. The present invention provides a gas path system with a brand-new structure. This gas path system is used to reduce the pressure of the high-pressure gas output by the gas cylinder to obtain the pressure required for coffee extraction. The gas path system is provided with a high-pressure pipeline, a gas pressure reducing mechanism, and a low-pressure pipeline. It can not only reduce the pressure, but also form a complete gas path to effectively realize the connection between the gas source and the gas-using components;

[0031] 3. The gas pressure reducing mechanism of this gas path system adopts a floating plugging component. This floating plugging component has a certain pressing force by itself. The high-pressure gas in the high-pressure chamber needs to overcome this pressing force before it can enter the low-pressure chamber. Thus, it can ensure that the gas entering the low-pressure chamber has a stable air pressure value, which ensures the stability of the extraction pressure required for subsequent coffee production;

[0032] 4. This gas pressure reducing mechanism adopts a disc spring as an elastic component. The disc spring has the advantages of short stroke, heavy load, small required space, easy maintenance and replacement, and long service life. Compared with the cylindrical helical compression spring used in traditional pressure reducing valves or pressure reducing structures, the elastic component formed by the combination of disc springs has less demand for axial dimensions, thus reducing the overall volume of the gas pressure reducing mechanism. Furthermore, it can be effectively combined with the coffee machine and can achieve a large-scale pressure reducing effect;

[0033] 5. This gas pressure reducing mechanism is provided with a bearing. This bearing adopts a miniature thrust ball flat bearing, whose function is to bear axial loads and has the advantages of high axial load and high stiffness. At the same time, its axial space occupation is small. More importantly, this bearing can realize the smooth operation of the adjustment knob, and the screwing process is smooth, greatly improving the user experience;

[0034] 6. The puncturing system of the present invention realizes the automatic puncturing operation of the gas cylinder, replaces the traditional manual operation of screwing the gas cylinder for puncturing, avoids the defects of manual operation, and has many advantages such as portable operation, convenient gas cylinder replacement, high puncturing efficiency, high safety, and less gas leakage;

[0035] 7. The gas cylinder type coffee machine of the present invention newly adds a balance valve mechanism to the traditional structure, which can automatically balance the pressure after extraction. It not only has high safety, but also is convenient for timely performing the second extraction or cleaning the coffee powder residue, and has many advantages such as convenient operation, high efficiency, and high safety;

[0036] 8. The present invention can use a gas cylinder or an external air pump as the gas source. Compared with the structure of a traditional coffee machine that uses a water pump for pressurization, it has many advantages such as less power consumption, less noise, and stable pressure. More importantly, it can greatly reduce the space occupation, enabling the machine to be of a small volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a perspective structural view of the overall gas cylinder type coffee machine of the present invention;

[0038] Figure 2 is Figure 1 a partial exploded structural view of the gas cylinder type coffee machine shown;

[0039] Figure 3 is Figure 1 a perspective structural view of the gas cylinder type coffee machine shown with the first housing and the second housing in a transparent state;

[0040] Figure 4 is a perspective structural view of the puncturing system of the present invention;

[0041] Figure 5 is Figure 4 a perspective structural view of the puncturing system shown with the gas cylinder omitted;

[0042] Figure 6 is Figure 5 a top view structural view of the one shown;

[0043] Figure 7 is Figure 6 a sectional structural view in the A-A direction of the one shown;

[0044] Figure 8 is Figure 7 an enlarged structural view at B of the one shown;

[0045] Figure 9 is Figure 5 a perspective structural view of one of the partial structures of the one shown;

[0046] Figure 10 is Figure 5 a perspective structural view of another of the partial structures of the one shown;

[0047] Figure 11 is an exploded structural view of the gas cylinder positioning mechanism of the present invention;

[0048] Figure 12 is a perspective structural view of the two parts of the gas path system and the main body of the present invention;

[0049] Figure 13 is a perspective structural view of the gas path system of the present invention;

[0050] Figure 14 is Figure 13 the front view structural schematic diagram of the gas circuit system shown;

[0051] Figure 15 is Figure 14 the sectional view structural schematic diagram in the C-C direction shown;

[0052] Figure 16 the three-dimensional structural schematic diagram of the gas pressure reducing mechanism of the present invention;

[0053] Figure 17 is Figure 16 the bottom view structural schematic diagram shown;

[0054] Figure 18 is Figure 17 the sectional view structural schematic diagram in the D-D direction shown;

[0055] Figure 19 the exploded structural schematic diagram of the gas pressure reducing mechanism of the present invention;

[0056] Figure 20 the three-dimensional structural schematic diagram of the first valve seat of the present invention;

[0057] Figure 21 the three-dimensional structural schematic diagram of the main machine of the present invention with the bin cover omitted;

[0058] Figure 22 is Figure 21 the top view structural schematic diagram shown;

[0059] Figure 23 is Figure 22 the sectional view structural schematic diagram in the E-E direction shown;

[0060] Figure 24 is Figure 23 the enlarged structural schematic diagram at the position F shown;

[0061] Figure 25 is Figure 23 the enlarged structural schematic diagram at the position G shown.

[0062] Figures 1 to 25 The reference numerals in:

[0063] a - Main unit; b - Pneumatic circuit system; c - Gas cylinder; d - First housing; e - Second housing; f - Base; g - Piercing system; h - Electric control system; a1 - Water sump; a2 - Coffee extraction chamber; a3 - Fixed seat; a4 - Portafilter; a5 - Third mounting seat; a6 - Check valve mechanism; a7 - Balance valve mechanism; a8 - Third sealing ring; a9 - Diverter; a10 - Chamber cover; a11 - Thermometer; b1 - High-pressure pipeline; b2 - Gas pressure reducing mechanism; b3 - Low-pressure pipeline; b4 - High-pressure sensor; b5 - Low-pressure sensor; b6 - Pressure relief mechanism; b7 - First connecting block; b8 - Second connecting block; b9 - Third connecting block; b10 - Fourth connecting block; h1 - Display screen; h2 - Control circuit board; h3 - Battery; a31 - First mounting groove; a32 - First conduction groove; a33 - Second mounting groove; a34 - Third through hole; a35 - Third mounting groove; a311 - First tapered portion; a331 - Second tapered portion; b31 - Inlet pipe; b61 - Pressure relief knob; b62 - Pressure relief valve assembly; b621 - Second valve seat; b622 - Pressure relief valve module; b6221 - Third valve needle; b6222 - Fifth sealing ring; b6223 - Fifth spring; b6224 - Third connector;

[0064] The following are the reference numerals of the piercing system g:

[0065] 11 - Gas cylinder positioning mechanism; 12 - Driving mechanism; 13 - Piercing mechanism; 14 - Mounting bracket; 15 - First sensing mechanism; 16 - Second sensing mechanism; 110 - Fifth mounting groove; 111 - Outer bracket; 112 - Inner bracket; 121 - Lifting drive assembly; 122 - Horizontal drive assembly; 131 - Second mounting seat; 132 - Piercing needle; 133 - Output pipe; 151 - First sensor; 152 - First sensing element; 161 - Second sensor; 162 - Second sensing element; 1121 - Top block; 1122 - Support seat; 1123 - Fourth spring; 1124 - Guide pin; 1211 - First driving member; 1212 - First transmission module; 1213 - Guide module; 1214 - Movable frame; 1215 - Elastic buffer module; 1221 - Second driving member; 1222 - Second transmission module; 1223 - Pushing cylinder; 1224 - First mounting seat; 1225 - Magnetic part; 1311 - Through hole; 1312 - Second limiting groove; 1321 - Gas passage; 1121a - First profiling groove; 1121b - First limiting groove; 1212a - First screw; 1212b - Nut; 1213a - Guide sleeve; 1213b - Guide rod; 1215a - Connecting member; 1215b - Third spring; 1222a - First bevel gear; 1222b - Second bevel gear; 1222c - Second screw; 1223a - Second profiling groove;

[0066] The following are the reference numerals of the gas pressure reducing mechanism b2:

[0067] 21 - First valve seat; 22 - Valve stem; 23 - Air inlet nozzle; 24 - Floating plug assembly; 25 - Adjusting knob; 26 - Bearing; 27 - Sealing cover; 211 - High-pressure chamber; 212 - Low-pressure chamber; 213 - Second threaded connection part; 214 - Fourth threaded connection part; 215 - First connection hole; 216 - Second connection hole; 221 - First threaded connection part; 222 - Guide groove; 231 - Air inlet passage; 232 - Air hole; 233 - Third threaded connection part; 241 - Floating rod; 242 - Elastic member; 243 - Plug piece; 242a - Disc spring; 241a - Third limit boss;

[0068] The following are the reference numerals of the one-way valve mechanism a6:

[0069] 30 - First passage; 31 - First fastener; 32 - First valve needle; 33 - First sealing ring; 34 - First spring; 35 - First connector; 311 - First through hole; 321 - First limit boss; 351 - Second through hole;

[0070] The following are the reference numerals of the balance valve mechanism a7:

[0071] 40 - Second passage; 41 - Second fastener; 42 - Second valve needle; 43 - Second sealing ring; 44 - Second spring; 45 - Second connector; 411 - Second conduction groove; 412 - Fourth installation groove; 421 - Second limit boss; 441 - Fourth through hole; 412a - Third conical part. Detailed implementation manners

[0072] The present invention will be further described in detail below with reference to the accompanying drawings.

[0073] Figures 1 to 25 Schematically shows a gas cylinder type coffee machine according to an embodiment of the present invention.

[0074] As Figures 1 to 25 shown, the gas cylinder type coffee machine includes a main machine a and a gas cylinder c. The main machine a includes a water tank a1 and a coffee extraction chamber a2 that are connected through a one-way valve mechanism a6. The gas cylinder c is connected to the input end of the gas path system b, and the output end of the gas path system b is connected to the water tank a1. The gas path system b includes a high-pressure pipeline b1, a gas pressure reducing mechanism b2, and a low-pressure pipeline b3. The input end of the high-pressure pipeline b1 is connected to the gas cylinder c, and the output end is connected to the high-pressure chamber 211 of the gas pressure reducing mechanism b2. The low-pressure chamber 212 of the gas pressure reducing mechanism b2 is connected to the input end of the low-pressure pipeline b3, and the output end of the low-pressure pipeline b3 is connected to the water tank a1.

[0075] Preferably, the main machine a of this embodiment further includes a fixing base a3, a powder bowl a4, a third mounting base a5, and a third sealing ring a8. The fixing base a3 is arranged at the bottom of the water tank a1. The third mounting base a5 is arranged at the bottom of the fixing base a3 and is detachably connected to the fixing base a3. The third sealing ring a8 is sleeved on the fixing base a3. The powder bowl a4 is sleeved in the third mounting base a5 and can be pressed by the third mounting base a5 against the third sealing ring a8. The powder bowl a4 is used to hold coffee powder. A coffee extraction chamber a2 is jointly formed between the powder bowl a4 and the fixing base a3. An air inlet pipe b31 is installed on the fixing base a3. The first end of the air inlet pipe b31 is communicated with the output end of the low-pressure pipeline b3, and the second end penetrates through the water tank a1 and extends into the top position inside the water tank a1. Thus, the hot water in the water tank a1 will flow out from the bottom of the water tank a1 into the powder bowl a4, contact the coffee powder in the powder bowl a4 to obtain coffee liquid, and the coffee liquid flows out from the filter holes at the bottom of the powder bowl a4.

[0076] Preferably, the main machine a of this embodiment further includes a flow dividing member a9. The flow dividing member a9 is installed on the fixing base a3 and is located at the outlet end of the one-way valve mechanism a6. The flow dividing member a9 plays a role in flow division, enabling the hot water to flow into the powder bowl a4 from both sides of the powder bowl a4.

[0077] Preferably, the gas cylinder type coffee machine of this embodiment further includes a first casing d, a second casing e, and a base f. The base f contacts the external installation surface. The first casing d is installed on the upper end surface of the base f and extends vertically upward perpendicular to the base f. The second casing e is installed on one side surface of the first casing d and extends horizontally perpendicular to the first casing d. The main machine a is installed through the second casing e and is parallel to the first casing d. The gas cylinder c is installed in the puncturing system g, and the puncturing system g is installed on the first casing d. Thus, the main frame of the gas cylinder type coffee machine of this embodiment has a U-shaped structure, with a simple and generous appearance, and at the same time can perfectly shield and hide most components, having strong aesthetics.

[0078] Preferably, the gas cylinder type coffee machine further includes an electric control system h. The electric control system h includes a display screen h1, a control circuit board h2, and a battery h3. The gas circuit system b further includes a high-pressure sensor b4 and a low-pressure sensor b5. The high-pressure sensor b4 cooperates with the high-pressure pipeline b1 to detect the air pressure value of the high-pressure gas in the high-pressure pipeline b1. The low-pressure sensor b5 cooperates with the low-pressure pipeline b3 to detect the air pressure value of the low-pressure gas in the low-pressure pipeline b3. The control circuit board h2 and the battery h3 are installed in the first casing d. The display screen h1 is installed on the surface of the first casing d and can at least be used to display the high-pressure sensor b4 and the low-pressure sensor b5. The control circuit board h2 is electrically connected to the battery h3, the display screen h1, the high-pressure sensor b4, the low-pressure sensor b5, and the electric control components of the puncturing system g.

[0079] Preferably, the display screen h1 may include two TFT display modules, which are respectively used to display the air pressure values detected by the high-pressure sensor b4 and the low-pressure sensor b5.

[0080] Preferably, the electric control system h further includes a TYPEC interface and a power switch that are installed on the first housing d and electrically connected to the control circuit board h2.

[0081] As shown in Figures 4 - 11 As shown, the puncturing system g of this embodiment includes a gas cylinder positioning mechanism 11, a driving mechanism 12, and a puncturing mechanism 13. The gas cylinder positioning mechanism 11 includes a fifth installation groove 110 that is in limit cooperation with the gas cylinder c. The driving mechanism 12 is used to drive the gas cylinder c to lift and translate. The puncturing mechanism 13 cooperates with the gas cylinder c and is used to puncture the gas cylinder c;

[0082] The driving mechanism 12 includes a lifting driving component 121 and a horizontal driving component 122. The lifting driving component 121 is connected to the gas cylinder positioning mechanism 1, and is used to drive the gas cylinder c to lift in the height direction. The horizontal driving component 122 cooperates with the gas cylinder c and is used to drive the gas cylinder c to translate in the horizontal direction.

[0083] Preferably, the puncturing system g further includes a mounting bracket 14. The mounting bracket 14 is fixedly installed on the first housing d through fasteners such as screws. The lifting driving component 121 includes a first driving member 1211, a first transmission module 1212, a guiding module 1213, and a movable frame 1214. The movable frame 1214 is movably installed on the mounting bracket 14 through the guiding module 1213. The first driving member 1211 is installed on the mounting bracket 14 and is in transmission connection with the first transmission module 1212. The first transmission module 1212 is connected to the movable frame 1214, and the movable frame 1214 is connected to the gas cylinder positioning mechanism 11.

[0084] More preferably, the first driving member 1211 of this embodiment is a servo motor.

[0085] Preferably, the guiding module 1213 includes a guiding sleeve 1213a installed on the mounting bracket 14 and a guiding rod 1213b that is sleeved on the guiding sleeve 1213a and fixedly connected to the movable frame 1214.

[0086] More preferably, the number of the guiding rods 1213b and the guiding sleeves 1213a can both be four.

[0087] Preferably, the first transmission module 1212 includes a first screw 1212a and a nut 1212b. The first screw 1212a is in transmission connection with the driving end of the first driving member 1211 through a transmission member such as a coupling. The nut 1212b is sleeved on the outer periphery of the first screw 1212a and is connected to the movable frame 1214.

[0088] Preferably, the lifting drive assembly 121 further includes an elastic buffer module 1215. The elastic buffer module 1215 includes a connecting member 1215a and a third spring 1215b. The nut 1212b and the movable frame 1214 are connected by the connecting member 1215a. The third spring 1215b is sleeved on the outer periphery of the connecting member 1215a and is located between the nut 1212b and the movable frame 1214.

[0089] More preferably, the connecting member 1215a is a screw and the number thereof is four.

[0090] The connecting member 1215a of the elastic buffer module 1215 serves as a connection function, while the third spring 1215b serves as a buffering function. Since the movable frame 1214 is movable, and the gas cylinder positioning mechanism 11 is arranged above the movable frame 1214. When installing the gas cylinder c, due to the certain gravity of the gas cylinder c and the external force applied by the user, these forces will act on the gas cylinder positioning mechanism 11 and then transfer to the movable frame 1214. The third spring 1215b of the elastic buffer module 1215 can convert these forces into spring elastic force to play a buffering role. The elastic buffer module 1215 of this embodiment has two functions of connection and buffering, with a small volume and strong functionality.

[0091] Preferably, the gas cylinder positioning mechanism 11 includes an outer bracket 111 and an inner bracket 112. The outer bracket 111 is provided with a cavity and is respectively connected to the puncturing mechanism 13 and the horizontal drive assembly 122. The inner bracket 112 is sleeved inside the outer bracket 111 and its bottom is connected to the movable frame 1214. The top of the inner bracket 112 is provided with a first profiling groove 1121a for limiting and cooperating with the gas cylinder c. The first profiling groove 1121a and the outer bracket 111 jointly enclose a fifth installation groove 110.

[0092] Preferably, the inner bracket 112 includes a top block 1121, a supporting seat 1122, a fourth spring 1123 and a guide pin 1124. The top block 1121 is movably installed above the supporting seat 1122 and is guided by the guide pin 1124. One end of the guide pin 1124 is threadedly connected to the supporting seat 1122, and the other end is slidably matched with the top block 1121. The bottom of the top block 1121 is provided with a first limiting groove 1121b. The fourth spring 1123 is installed in the first limiting groove 1121b and abuts against the top block 1121 and the supporting seat 1122 respectively.

[0093] Preferably, the horizontal drive assembly 122 includes a second driving member 1221, a second transmission module 1222 and a top cylinder 1223. The second driving member 1221 is in transmission connection with the second transmission module 1222. The second transmission module 1222 is connected to the top cylinder 1223. The top cylinder 1223 cooperates with the gas cylinder c.

[0094] As a further preference, the second driving member 1221 of this embodiment is a servo motor.

[0095] Preferably, the horizontal driving assembly 122 further includes a first mounting seat 1224. The first mounting seat 1224 is connected to the outer bracket 111. The second transmission module 1222 includes a first bevel gear 1222a, a second bevel gear 1222b, and a second screw 1222c. The first bevel gear 1222a is coaxially connected to the driving end of the second driving member 1221. The second bevel gear 1222b meshes with the first bevel gear 1222a. The second screw 1222c is sleeved on the second bevel gear 1222b. The first bevel gear 1222a and the second bevel gear 1222b are rotatably mounted on the first mounting seat 1224. The top cylinder 1223 is movably sleeved on the outer periphery of the second screw 1222c and is slidably engaged with the first mounting seat 1224.

[0096] Preferably, the top cylinder 1223 is provided with a second profiling groove 1223a that is in limit fit with the tail of the gas cylinder c. A magnetic attraction member 1225 that cooperates with the gas cylinder c is provided at the bottom of the second profiling groove 1223a. Thus, the magnetic attraction member 1225 is a magnetic sheet. Its function is that when the gas in the gas cylinder c is used up and needs to be replaced, etc., when the gas cylinder c needs to be taken out of the fifth mounting groove 110, the horizontal driving assembly 122 works to drive the top cylinder 1223 to retreat and reset. At this time, the magnetic attraction member 1225 will attract the gas cylinder c and drive the gas cylinder c to retreat together. The top seat will also retreat and reset under the action of the fourth spring 1123. At this time, the lifting driving assembly 121 can drive the inner bracket 112 and the gas cylinder c to rise together.

[0097] Preferably, the puncturing system g further includes a first sensing mechanism 15 and a second sensing mechanism 16. The first sensing mechanism 15 includes a first sensor 151 mounted on the mounting frame 14 and a first sensing member 152 mounted on the movable frame 1214 and cooperating with the first sensor 151. The second sensing mechanism 16 includes a second sensor 161 mounted on the mounting frame 14 and a second sensing member 162 mounted on the top cylinder 1223 and cooperating with the second sensor 161.

[0098] As a further preference, both the first sensor 151 and the second sensor 161 are in pairs. A pair of first sensors 151 are arranged on the upper and lower sides of the first sensing member 152. A pair of second sensors 161 are arranged on the left and right sides of the second sensing member 162. The first sensor 151 and the second sensor 161 are commercially available microswitches, proximity switches, or photoelectric sensors, etc. The first sensing member 152 and the second sensing member 162 are sheet-shaped sensing members.

[0099] Preferably, the puncturing mechanism 13 includes a second mounting seat 131, a puncturing needle 132, and an output pipe 133. The second mounting seat 131 is provided with a through hole 1311 adapted to the mouth of the gas cylinder c. The puncturing needle 132 is installed in the second mounting seat 131 and its head extends into the through hole 1311. A second limiting groove 312 for limiting and mating with the output pipe 133 is formed in the second mounting seat 131. The first end of the output pipe 133 extends into the second limiting groove 312 of the second mounting seat 131, and the second end is connected to the input end of the high-pressure pipeline b1.

[0100] Preferably, an air passage 1321 communicating with the output pipe 133 is formed in the center of the puncturing needle 132.

[0101] The working principle of the puncturing system g in this embodiment is as follows:

[0102] First, place the gas cylinder c into the fifth mounting groove 110. Then, the lifting drive assembly 121 operates. The first driving member 1211 drives the first screw 1212a to rotate, driving the nut 1212b to move downward along the first screw 1212a. Since the nut 1212b is connected to the movable frame 1214 and the movable frame 1214 is connected to the inner bracket 112, the downward movement of the nut 1212b will pull the movable frame 1214 and the inner bracket 112 to move downward together. During the movement, the guide rod 1213b moves relative to the guide sleeve 1213a to play a guiding role and ensure the smooth operation of the downward movement. The first sensing mechanism 15 plays a position detection role to ensure accurate downward movement to the specified position. When the inner bracket 112 moves down to the specified position, the mouth of the gas cylinder c is exactly aligned with the through hole 1311 of the puncturing mechanism 13. At this time, the lifting drive assembly 121 stops operating; the horizontal drive assembly 122 operates. The second driving member 1221 drives the first bevel gear 1222a to rotate, and the first bevel gear 1222a drives the second bevel gear 1222b to rotate, causing the second screw 1222c to move relative to the second bevel gear 1222b in the direction towards the top cylinder 1223. Since the top cylinder 1223 is connected to the screw, the translation of the second screw 1222c will drive the top cylinder 1223 to translate. The upper end surface of the second mounting seat 131 plays a guiding role during the translation of the top cylinder 1223. After the top cylinder 1223 translates to contact the gas cylinder c, the second profiling groove 1223a fits with the tail of the gas cylinder c. Continuing to translate the top cylinder 1223 will push the gas cylinder c to translate together. The mouth of the gas cylinder c extends into the through hole 1311 of the puncturing mechanism 13 and contacts the puncturing needle 132 to complete the puncturing.

[0103] When the gas in the gas cylinder c is used up and the gas cylinder c needs to be replaced, or when the gas cylinder c needs to be taken out for other reasons, the horizontal drive assembly 122 works first. The second drive member 1221 works, causing the second screw 1222c to move away from the top cylinder 1223 relative to the second bevel gear 1222b, driving the top cylinder 1223 to translate and reset. Since the magnetic attraction member 1225 is arranged in the second profiling groove 1223a of the top cylinder 1223, the gas cylinder c is adsorbed on the top cylinder 1223 at this time. The translation of the top cylinder 1223 will drive the gas cylinder c to translate together, and the gas cylinder c will retreat and reset. Due to the arrangement of the fourth spring 1123, the top seat will also retreat and reset under the action of the fourth spring 1123. Then the lifting drive assembly 121 works to drive the movable frame 1214 and the inner bracket 112 to move upward. After moving in place, the gas cylinder c can be taken out.

[0104] As Figures 12 to 20 shown, the gas pressure reducing mechanism b2 of this embodiment includes a first valve seat 21, a valve rod 22, an air inlet nozzle 23, a floating plugging assembly 24, and an adjusting knob 25. A high-pressure chamber 211 and a low-pressure chamber 212 are formed in the first valve seat 21. The air inlet nozzle 23 is installed in the first valve seat 21 and separates the high-pressure chamber 211 from the low-pressure chamber 212. An air inlet passage 231 is opened in the air inlet nozzle 23, and an air hole 232 is arranged at the end of the air inlet passage 231. The valve rod 22 is sleeved on the first valve seat 21. The floating plugging assembly 24 is installed at the first end of the valve rod 22 and is matched with the air outlet end of the air hole 232. The floating plugging assembly 24 can always keep elastic contact with the air inlet nozzle 23. The adjusting knob is installed at the second end of the valve rod 22 and can drive the valve rod 22 to rotate.

[0105] Preferably, the floating plugging assembly 24 includes a floating rod 241 and an elastic member 242. One end of the floating rod 241 is movably sleeved on the valve rod 22, and the other end is matched with the air hole 232. The elastic member 242 is sleeved on the outer periphery of the floating rod 241, and both ends are respectively abutted against the valve rod 22 and the floating rod 241. Under the action of the elastic member 242, the floating rod 241 always keeps elastic contact with the air inlet nozzle 23.

[0106] Preferably, a guiding groove 222 for limit matching with the floating rod 241 is opened at one end of the valve rod 22 away from the adjusting knob 25.

[0107] Preferably, the elastic member 242 includes at least one set of disc springs 242a.

[0108] Further preferably, there are two sets of disc springs 242a in this embodiment, and each set of disc springs 242a includes two disc spring pieces combined in an opposing manner.

[0109] Preferably, a third limiting boss 241a is formed at one end of the floating rod 241 away from the valve rod 22. The third limiting boss 241a is movably installed in the low-pressure chamber 212 and cooperates with the air hole 232. The first end of the elastic member 242 abuts against the third limiting boss 241a.

[0110] Preferably, the gas decompression mechanism b2 further includes a bearing 26. The bearing 26 is installed at one end of the valve rod 22 away from the adjusting knob 25 and sleeved on the outer periphery of the floating rod 241. The two ends of the elastic member 242 abut against the bearing 26.

[0111] More preferably, the bearing 26 is a commercially available miniature thrust ball flat bearing 26 with the model number F4-8M. It can obtain a high axial load and high stiffness in a very small space.

[0112] Preferably, the floating plugging assembly 24 further includes a plugging piece 243. The plugging piece 243 is installed at the center of the end face of the floating rod 241 close to the air inlet nozzle 23 and cooperates with the air hole 232.

[0113] More preferably, the plugging piece 243 is a tetrafluoro gasket. The fluorine gasket has good properties such as corrosion resistance, anti-aging and non-conductivity. It can have good mechanical strength between -100°C and 100°C. In this embodiment, the tetrafluoro gasket can achieve soft contact with the air inlet nozzle 23, which can not only avoid direct contact between the floating rod 241 and the air inlet nozzle 23, reduce friction and extend the service life, but also have good sealing performance after plugging to prevent air leakage and gas cross-flow.

[0114] Preferably, the valve rod 22 is threadedly connected to the first valve seat 21.

[0115] More preferably, a first threaded connection portion 221 is provided on the outer wall of the valve rod 22, and a second threaded connection portion 213 cooperating with the first threaded connection portion 221 is provided on the inner wall of the first valve seat 21.

[0116] Preferably, the air inlet nozzle 23 is threadedly connected to the first valve seat 21.

[0117] More preferably, a third threaded connection portion 233 is provided on the outer wall of the air inlet nozzle 23, and a fourth threaded connection portion 214 cooperating with the third threaded connection portion 233 is provided on the inner wall of the first valve seat 21.

[0118] Preferably, the gas decompression mechanism b2 further includes a sealing cover 27. The sealing cover 27 is fixedly installed on the end face of the first valve seat 21 away from the valve rod 22 through fasteners such as screws and is hermetically fitted with the first valve seat 21 through a fourth sealing ring. The first valve seat 21, the air inlet nozzle 23 and the sealing cover 27 jointly enclose a high-pressure chamber 211.

[0119] In addition, to achieve this, a first connection hole 215 for accessing the high-pressure pipeline b1 and a second connection hole 216 for accessing the low-pressure pipeline b3 are further formed on the first valve seat 21 of this embodiment. The first connection hole 215 communicates with the high-pressure chamber 211, and the second connection hole 216 communicates with the low-pressure chamber 212.

[0120] Reference Figures 12 - 15 As a preference, the gas circuit system b further includes a pressure relief mechanism b6. The pressure relief mechanism b6 is installed at one end of the second housing e away from the first valve seat 21. The pressure relief mechanism b6 includes a pressure relief knob b61 and a pressure relief valve assembly b62. The pressure relief valve assembly b62 includes a second valve seat b621 and a pressure relief valve module b622 installed in the second valve seat b621. The pressure relief valve module b622 includes a third valve needle b6221, a fifth sealing ring b6222, a fifth spring b6223, and a third connector b6224. A four-way chamber is formed in the second valve seat b621. The first passage of the four-way chamber communicates with the low-pressure pipeline b3, the second passage communicates with the intake pipe b31, the third passage is for installing the pressure relief knob b61, and the fourth passage is for installing the pressure relief valve module b622. The third valve needle b6221 is movably installed in the second valve seat b621. The fifth sealing ring b6222 is sleeved on the outer periphery of the third valve needle b6221 and is in sealing cooperation with the second valve seat b621. The third connector b6224 is installed in the second valve seat b621. The fifth spring b6223 is sleeved on one end of the third valve needle b6221 close to the third connector b6224 and abuts against the third connector b6224. Under the action of the fifth spring b6223, the third valve needle b6221 is in elastic contact with the second valve seat b621 through the fifth sealing ring b6222, thereby enabling the opening and closing of the fourth passage of the four-way chamber. After the fourth passage is opened, the gas in the low-pressure pipeline b3 directly discharges from the central passage of the third connector b6224, achieving the purpose of pressure relief.

[0121] Preferably, the gas circuit system b further includes a first connection block b7, a second connection block b8, a third connection block b9, and a fourth connection block b10. A four-way cavity is provided in the first connection block b7. The first passage of the four-way cavity is connected to the output pipe 133 of the puncturing mechanism 13, the second passage is connected to the high-pressure pipeline b1, the third passage is connected to the high-pressure sensor b4, and the fourth passage is a threaded external interface for externally connecting an air inflation pump (such as a Xiaomi air inflation pump) or other gas sources. A two-way cavity is provided in the second connection block b8, mainly to realize the turning and dimension extension of the high-pressure pipeline b1. The third connection block b9 is installed on the side wall of the first valve seat 21, and a three-way cavity is provided in its inner wall. The first passage of the three-way cavity is connected to the low-pressure cavity 212 of the first valve seat 21, the second passage is connected to the fourth connection block b10 through the low-pressure pipeline b3, and the third passage is connected to the second valve seat b621 of the pressure relief mechanism b6 through the low-pressure pipeline b3. A two-way cavity is provided in the fourth connection block b10. The first passage of the two-way cavity is connected to the low-pressure sensor b5, and the second passage is connected to the low-pressure pipeline b3.

[0122] The working principle of the gas pressure reducing mechanism b2 in this embodiment is as follows:

[0123] In this embodiment, a gas cylinder c is used as the gas source for illustration. The gas cylinder c can be a commercially available small carbon dioxide steel cylinder with a specification of 8g. The pressure range of the high-pressure gas in the gas cylinder c is 60 - 70 bar. For a professional Italian coffee machine, espresso is mainly made by applying 9 bar of pressure with hot water at about 93 degrees Celsius to soak the coffee powder, producing strong and mellow Italian coffee.

[0124] Assume that the pressure value of the high-pressure gas output from the gas cylinder c is P1, the pressure value of the low-pressure gas entering the low-pressure cavity 212 from the high-pressure cavity 211 is P0, and the pressure value for pressing the air inlet nozzle 23 by the preset floating plugging assembly 24 is P2. Then P0 should satisfy: P0 ≤ P1 - P2.

[0125] The working principle of the gas pressure reducing mechanism b2 in this embodiment is as follows: Taking the output pressure of the gas cylinder c as 65 bar (i.e., P1 = 65 bar) as an example, by adjusting the adjusting knob 25 and setting the elastic member 242, the pressing force of the floating plug assembly 24 pressing against the air inlet 23 is set to 56 bar (i.e., P2 = 56 bar). In this state, the high-pressure gas in the high-pressure chamber 211 can cause the floating rod 241 of the floating plug assembly 24 to move away from the air inlet 23 and enter the low-pressure chamber 212 through the air hole 232. Since the high-pressure gas overcomes the pressing force of the floating plug assembly 24 pressing against the air inlet 23, that is, the high-pressure gas is passively decompressed, the pressure of the gas actually entering the low-pressure chamber 212 is reduced to 9 bar (i.e., P0 = 9 bar); when the output pressure of the gas cylinder c is lower than 65 bar or the air pressure in the low-pressure chamber 212 is greater than 9 bar, the floating plug assembly 24 can be reset under the action of the elastic member 242 and block the air hole 232 of the air inlet 23 again. In this way, it can ensure that the gas entering the low-pressure chamber 212 can be stabilized at about 9 bar, and further ensure that the extraction pressure is stabilized at about 9 bar, meeting the extraction pressure requirements of a professional Italian coffee machine.

[0126] As Figures shown, the main body a of this embodiment further includes a balance valve mechanism a7 installed between the water tank a1 and the fixed seat a3. The one-way valve mechanism a6 forms a first passage 30 connecting the water tank a1 and the coffee extraction chamber a2, and the balance valve mechanism a7 forms a second passage 40 connecting the water tank a1 and the coffee extraction chamber a2. The one-way valve mechanism a6 and the balance valve mechanism a7 are arranged in the opposite direction.

[0127] Preferably, the one-way valve mechanism a6 includes a first fastener 31 and a first valve needle 32, a first sealing ring 33, a first spring 34, and a first connector 35 arranged in sequence along the first direction. The first fastener 31 is installed on the water tank a1 and connected to the fixed seat a3. The first valve needle 32 is movably installed in the fixed seat a3. The first sealing ring 33 is sleeved on the outer periphery of the first valve needle 32 and is in sealing cooperation with the fixed seat a3. The first connector 35 is installed on the fixed seat a3. The first spring 34 is sleeved on one end of the first valve needle 32 close to the first connector 35 and abuts against the first connector 35. Under the action of the first spring 34, the first valve needle 32 is in elastic contact with the fixed seat a3 through the first sealing ring 33.

[0128] Preferably, the balance valve mechanism a7 includes a second fastener 41, and a second valve needle 42, a second sealing ring 43, a second spring 44, and a second connector 45 that are arranged in sequence along a second direction opposite to the first direction. The second fastener 41 is installed in the water tank a1 and connected to the fixed seat a3. The second valve needle 42 is movably installed in the second fastener 41. The second sealing ring 43 is sleeved on the outer periphery of the second valve needle 42 and is in sealing cooperation with the second fastener 41. The second connector 45 is installed in the second fastener 41. The second spring 44 is sleeved on one end of the second valve needle 42 close to the second connector 45 and abuts against the second connector 45. Under the action of the second spring 44, the second valve needle 42 is in elastic contact with the second fastener 41 through the second sealing ring 43.

[0129] Preferably, a first through hole 311 is provided inside the first fastener 31. The fixed seat a3 is provided with a first installation groove a31, a first conduction groove a32, and a second installation groove a33 that are arranged in sequence along the first direction. A second through hole 351 is provided inside the first connector 35. The first through hole 311, the first installation groove a31, the first conduction groove a32, the second installation groove a33, and the second through hole 351 together form a first channel 30. The first fastener 31 is connected to the first installation groove a31. The first valve needle 32 is movably installed in the first conduction groove a32, and both ends thereof extend into the first installation groove a31 and the second installation groove a33 respectively. The first connector 35 is installed in the second installation groove a33. The first spring 34 is pressed by the first valve needle 32 against the groove wall of the second installation groove a33.

[0130] Preferably, the first fastener 31 is threadedly connected to the first installation groove a31, and the first connector 35 is threadedly connected to the second installation groove a33. Thus, it is convenient to achieve disassembly.

[0131] As a further preference, the groove wall of the first installation groove a31 is provided with a first thread, and the outer wall of one end of the first fastener 31 close to the fixed seat a3 is provided with a second thread that mates with the first thread. The groove wall of the second installation groove a33 is provided with a third thread, and the outer wall of the first connector 35 is provided with a fourth thread that mates with the third thread.

[0132] Preferably, a first tapered portion a311 is formed at the bottom of the first installation groove a31, and a second tapered portion a331 is formed at the top of the second installation groove a33. The first conduction groove a32 communicates with the first tapered portion a311 and the second tapered portion a331. The first valve needle 32 is formed with a first limiting boss 321. The first end face of the first limiting boss 321 contacts the first spring 34, and the second end face of the first limiting boss 321 contacts the first sealing ring 33 and can press the first sealing ring 33 against the second tapered portion a331.

[0133] Preferably, a third through hole a34 and a third installation groove a35 are formed in the fixed seat a3 and arranged in sequence along the second direction. A second conduction groove 411 and a fourth installation groove 412 are formed in the second fastener 41 and arranged in sequence along the second direction. A fourth through hole 451 is formed inside the second connector 45. The third through hole a34, the third installation groove a35, the second conduction groove 411, the fourth installation groove 412, and the fourth through hole 451 together form a second channel 40. The second fastener 41 is connected to the third installation groove a35. One end of the second valve needle 42 is movably installed in the second conduction groove 411, and the second end extends into the fourth installation groove 412. The second connector 45 is installed in the fourth installation groove 412. The second spring 44 is pressed by the second valve needle 42 against the groove wall of the fourth installation groove 412.

[0134] More preferably, the first spring 34 and the second spring 44 in this embodiment are both flared springs.

[0135] Preferably, the second fastener 41 is threadedly connected to the third installation groove a35, and the second connector 45 is threadedly connected to the fourth installation groove 412. Thus, disassembly is facilitated.

[0136] More preferably, a fifth thread is provided on the groove wall of the third installation groove a35, and a sixth thread that mates with the fifth thread is provided on the outer wall of the end of the second fastener 41 close to the fixed seat a3. A seventh thread is provided on the groove wall of the fourth installation groove 412, and an eighth thread that mates with the seventh thread is provided on the outer wall of the second connector 45.

[0137] Preferably, a third tapered portion 412a is formed at the bottom of the fourth installation groove 412. The second conduction groove 411 communicates with the third tapered portion 412a and the third installation groove a35. The second valve needle 42 is formed with a second limiting boss 421. The first end face of the second limiting boss 421 contacts the second spring 44, and the second end face of the second limiting boss 421 contacts the second sealing ring 43 and can press the second sealing ring 43 against the third tapered portion 412a.

[0138] More preferably, the first sealing ring 33, the second sealing ring 43, and the third sealing ring a8 can all be silicone sealing rings.

[0139] The balance valve mechanism a7 in this embodiment realizes the automatic balance of the air pressure between the water tank a1 and the coffee extraction chamber a2. The specific working principle is as follows:

[0140] When the pressure in the water tank a1 reaches the extraction pressure, the one-way valve mechanism a6 operates, and the first valve needle 32 moves in the first direction, causing the first channel 30 to open. The hot water in the water tank a1 flows into the coffee extraction chamber a2 through the first channel 30 and mixes with the coffee powder in the portafilter a4 to obtain coffee liquid. After the extraction is completed, the first valve needle 32 of the one-way valve mechanism a6 resets under the action of the first spring 34, pushing the first sealing ring 33 to block the first channel 30. Since the pressure in the coffee extraction chamber a2 is greater than the pressure in the water tank a1, at this time, the balance valve mechanism a7 operates, and the second valve needle 42 moves in the second direction, causing the second channel 40 to open. The steam in the coffee extraction chamber a2 can then flow into the water tank a1 through the second channel 40. At this time, by disassembling the third mounting seat a5 from the fixed seat a3, the portafilter a4 can be directly disassembled for a second extraction or to clean the coffee grounds.

[0141] As ​ shown, the main body a of this embodiment further includes a tank cover a10 and a thermometer a11. The tank cover a10 is detachably installed on the top of the water tank a1 and can be hermetically connected to the water tank a1 after being closed. The dial of the thermometer a11 is installed on the side wall of the water tank a1, and the temperature detection head extends into the interior of the water tank a1.

[0142] The working principle of the gas cylinder type coffee machine of this embodiment is as follows:

[0143] Place the gas cylinder c into the fifth installation groove 110 of the puncturing system g. The puncturing system g operates to automatically puncture the gas cylinder c. After puncturing, the high-pressure gas in the gas cylinder c sequentially passes through the output pipe 133 and the high-pressure pipeline b1 and enters the gas pressure reducing mechanism b2. The gas pressure reducing mechanism b2 operates to reduce the pressure of the high-pressure gas. The reduced low-pressure gas is transported through the low-pressure pipeline b3 to the inlet pipe b31. The low-pressure gas exits from the outlet end of the inlet pipe b31 and pressurizes the water in the water tank a1 from the top of the water tank a1. The water in the water tank a1 breaks through the one-way valve mechanism a6 under the action of the air pressure and enters the coffee extraction chamber a2, contacts the coffee powder in the portafilter a4, and the obtained coffee liquid flows out from the bottom of the portafilter a4 into the coffee cup placed on the base f.

[0144] The gas cylinder type coffee machine of the present invention has at least the following advantages compared with the prior art:

[0145] 1. The gas cylinder type coffee machine of the present invention integrates an automatic puncturing structure, a pressure reducing structure, a balance valve structure, and a pressure relief structure. It not only has strong functionality, but also has a simple and beautiful overall appearance, small volume, and small space occupation;

[0146] 2. The present invention provides a gas path system b with a brand-new structure, which is used to reduce the pressure of the high-pressure gas output by the gas cylinder c to obtain the pressure required for extracting coffee. The gas path system b is provided with a high-pressure pipeline b1, a gas pressure reduction mechanism b2 and a low-pressure pipeline b3, which can not only reduce the pressure, but also form a complete gas path to effectively realize the connection between the gas source and the gas-using components;

[0147] 3. The gas pressure reduction mechanism b2 of the gas path system b adopts a floating plugging component 24, which has a certain pressing force by itself. The high-pressure gas in the high-pressure chamber 211 needs to overcome this pressing force before it can enter the low-pressure chamber 212. Thus, it can ensure that the gas entering the low-pressure chamber 212 has a stable air pressure value, which ensures the stability of the extraction pressure required for subsequent coffee production;

[0148] 4. The gas pressure reduction mechanism b2 adopts a disc spring 242a as the elastic member 242. The disc spring 242a has the advantages of short stroke, heavy load, small required space, easy maintenance and replacement, long service life, etc. Compared with the cylindrical helical compression spring used in traditional pressure reducing valves or pressure reducing structures, the elastic member 242 formed by the combination of disc springs has less demand for axial dimensions, thereby reducing the overall volume of the gas pressure reduction mechanism b2, and then can be effectively combined with the coffee machine, and can also achieve a large range of pressure reduction effects;

[0149] 5. The gas pressure reduction mechanism b2 is provided with a bearing 26, which adopts a miniature thrust ball flat bearing 26. Its function is to bear axial loads, and it has the advantages of high axial load and high stiffness. At the same time, its axial space occupation is small. More importantly, the bearing 26 can realize the smooth operation of the adjustment knob 25, and the screwing process is smooth, greatly improving the user experience;

[0150] 6. The puncturing system g of the present invention realizes the automation of the gas cylinder puncturing action, replaces the traditional manual operation of screwing the gas cylinder for puncturing, avoids the defects of manual operation, and has many advantages such as portable operation, convenient gas cylinder replacement, high puncturing efficiency, high safety, and less gas leakage;

[0151] 7. The gas cylinder type coffee machine of the present invention newly adds a balance valve mechanism a7 on the traditional structure, which can automatically balance the pressure after the extraction is completed. It not only has high safety, but also is convenient for timely performing the second extraction or cleaning the coffee grounds, and has many advantages such as convenient operation, high efficiency, and high safety;

[0152] 8. The present invention mainly uses the gas cylinder c as the high-pressure gas source. Compared with the structure of traditional coffee machines that use water pumps for pressurization, it has many advantages such as less power consumption, less noise, and stable pressure. More importantly, it can greatly reduce the space occupation, making the machine small in volume.

[0153] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention.

Claims

1. A gas cylinder type coffee machine, characterized in that, It includes a main body (a), a puncturing system (g), a gas circuit system (b), and a gas cylinder (c). The main body (a) includes a water tank (a1) and a coffee extraction chamber (a2) that are connected through a one-way valve mechanism (a6). The puncturing system (g) cooperates with the gas cylinder (c) and is used to puncture the gas cylinder (c). The input end of the gas circuit system (b) is connected to the gas output end of the puncturing system (g), and the output end of the gas circuit system (b) is connected to the water tank (a1). After puncturing, the gas in the gas cylinder (c) enters the gas circuit system (b) and can be transported to the water tank (a1). The puncturing system (g) includes a mounting frame (14), a gas cylinder positioning mechanism (11), a driving mechanism (12), and a puncturing mechanism (13). The gas cylinder positioning mechanism (11) includes a fifth mounting groove (110) that is in limit cooperation with the gas cylinder (c). The driving mechanism (12) is used to drive the gas cylinder (c) to move up and down and horizontally. The puncturing mechanism (13) cooperates with the gas cylinder (c) and is used to puncture the gas cylinder (c). The gas circuit system (b) includes a high-pressure pipeline (b1), a gas pressure reducing mechanism (b2), and a low-pressure pipeline (b3). The input end of the high-pressure pipeline (b1) is connected to the gas output end of the puncturing system (g), and the output end is connected to the high-pressure chamber (211) of the gas pressure reducing mechanism (b2). The low-pressure chamber (212) of the gas pressure reducing mechanism (b2) is connected to the input end of the low-pressure pipeline (b3), and the output end of the low-pressure pipeline (b3) is connected to the water tank (a1).

2. The gas cylinder type coffee machine according to claim 1, characterized in that, The driving mechanism (12) includes a lifting driving component (121) and a horizontal driving component (122). The lifting driving component (121) is connected to the gas cylinder positioning mechanism (11) and is used to drive the gas cylinder (c) to move up and down in the height direction. The horizontal driving component (122) cooperates with the gas cylinder (c) and is used to drive the gas cylinder (c) to move horizontally. The lifting driving component (121) includes a first driving member (1211), a first transmission module (1212), and a movable frame (1214). The movable frame (1214) is movably installed on the mounting frame (14). The first driving member (1211) is installed on the mounting frame (14) and is in transmission connection with the first transmission module (1212). The first transmission module (1212) is connected to the movable frame (1214), and the movable frame (1214) is connected to the gas cylinder (c) positioning mechanism. The horizontal driving component (122) includes a second driving member (1221), a second transmission module (1222), and a top cylinder (1223). The second driving member (1221) is in transmission connection with the second transmission module (1222). The second transmission module (1222) is connected to the top cylinder (1223), and the top cylinder (1223) cooperates with the gas cylinder (c).

3. The gas cylinder type coffee machine according to claim 2, characterized in that The cylinder positioning mechanism (11) includes an outer bracket (111) and an inner bracket (112). The outer bracket (111) is provided with a cavity and is respectively connected to the puncturing mechanism (13) and the horizontal driving assembly (122). The inner bracket (112) is sleeved inside the outer bracket (111) and its bottom is connected to the movable frame (1214). A first profiling groove (1121a) for limit cooperation with the gas cylinder (c) is formed at the top of the inner bracket (112). The first profiling groove (1121a) and the outer bracket (111) jointly enclose the fifth installation groove (110). The inner bracket (112) includes a top block (1121), a supporting seat (1122), a fourth spring (1123) and a guide pin (1124). The top block (1121) is movably installed above the supporting seat (1122) and is guided by the guide pin (1124). A first limiting groove (1121b) is formed at the bottom of the top block (1121). The fourth spring (1123) is installed in the first limiting groove (1121b) and abuts against the top block (1121) and the supporting seat (1122) respectively. The puncturing mechanism (13) includes a second mounting seat (131), a puncturing needle (132) and an output pipe (133). The second mounting seat (131) is provided with a through hole (1311) matching the mouth of the gas cylinder (c). The puncturing needle (132) is installed inside the second mounting seat (131) and its head extends into the through hole (1311). The first end of the output pipe (133) extends into the second mounting seat (131), and the second end is connected to the high-pressure pipeline (b1). An air passage (1321) is formed in the center of the puncturing needle (132), and the air passage (1321) is communicated with the output pipe (133).

4. The gas cylinder type coffee machine according to claim 1, characterized in that The gas pressure reducing mechanism (b2) includes a first valve seat (21), a valve rod (22), an air inlet nozzle (23), a floating plugging assembly (24) and an adjusting knob (25). A high-pressure chamber (211) and a low-pressure chamber (212) are formed inside the first valve seat (21). The air inlet nozzle (23) is installed inside the first valve seat (21) and separates the high-pressure chamber (211) and the low-pressure chamber (212). An air inlet passage (231) is formed in the air inlet nozzle (23), and an air hole (232) is arranged at the end of the air inlet passage (231). The valve rod (22) is sleeved on the first valve seat (21). The floating plugging assembly (24) is installed at the first end of the valve rod (22) and cooperates with the air outlet end of the air hole (232). The floating plugging assembly (24) can always keep elastic contact with the air inlet nozzle (23). The adjusting knob is installed at the second end of the valve rod (22) and can drive the valve rod (22) to rotate.

5. The gas cylinder type coffee machine according to claim 4, characterized in that, The gas pressure reducing mechanism (b2) further includes a bearing (26). The floating plug assembly (24) includes a floating rod (241) and an elastic member (242). One end of the floating rod (241) is movably sleeved on the valve rod (22), and the other end is matched with the air hole (232). The elastic member (242) is sleeved on the outer periphery of the floating rod (241), and both ends thereof are respectively abutted against the valve rod (22) and the floating rod (241). Under the action of the elastic member (242), the floating rod (241) always elastically contacts the air inlet nozzle (23). A third limit boss (241a) is formed at one end of the floating rod (241) away from the valve rod (22). The third limit boss (241a) is movably installed in the low-pressure chamber (212) and is matched with the air hole (232). The bearing (26) is installed at one end of the valve rod (22) away from the adjusting knob (25) and is sleeved on the outer periphery of the floating rod (241). The first end of the elastic member (242) abuts against the third limit boss (241a), and the second end abuts against the bearing (26).

6. The gas cylinder type coffee machine according to any one of claims 1-5, characterized in that The main body (a) further includes a fixed seat (a3), a powder bowl (a4), a third mounting seat (a5) and a third sealing ring (a8). The fixed seat (a3) is arranged at the bottom of the water tank (a1). The third mounting seat (a5) is arranged at the bottom of the fixed seat (a3) and is detachably connected to the fixed seat (a3). The third sealing ring (a8) is sleeved on the fixed seat (a3). The powder bowl (a4) is sleeved in the third mounting seat (a5) and can be pressed by the third mounting seat (a5) against the third sealing ring (a8). The powder bowl (a4) is used for containing coffee powder. A coffee extraction chamber (a2) is jointly formed between the powder bowl (a4) and the fixed seat (a3). An air inlet pipe (b31) is installed on the fixed seat (a3). The first end of the air inlet pipe (b31) is communicated with the output end of the low-pressure pipeline (b3), and the second end penetrates through the water tank (a1) and extends to the top position inside the water tank (a1).

7. The gas cylinder type coffee machine according to claim 6, wherein, The main body (a) further includes a balance valve mechanism (a7). The one-way valve mechanism (a6) forms a first channel (30) communicating the water tank (a1) and the coffee extraction chamber (a2). The balance valve mechanism (a7) forms a second channel (40) communicating the water tank (a1) and the coffee extraction chamber (a2). The one-way valve mechanism (a6) and the balance valve mechanism (a7) are arranged in the reverse direction.

8. The gas cylinder type coffee machine according to claim 7, characterized in that, The one-way valve mechanism (a6) includes a first fastener (31), a first valve needle (32), a first sealing ring (33), a first spring (34), and a first connector (35) arranged in sequence along a first direction. The first fastener (31) is installed on the water tank (a1) and connected to the fixed seat (a3). The first valve needle (32) is movably installed in the fixed seat (a3). The first sealing ring (33) is sleeved on the outer periphery of the first valve needle (32) and is in sealing cooperation with the fixed seat (a3). The first connector (35) is installed on the fixed seat (a3). The first spring (34) is sleeved on one end of the first valve needle (32) close to the first connector (35) and abuts against the first connector (35). Under the action of the first spring (34), the first valve needle (32) maintains elastic contact with the fixed seat (a3) through the first sealing ring (33). The balance valve mechanism (a7) includes a second fastener (41), a second valve needle (42), a second sealing ring (43), a second spring (44), and a second connector (45) arranged in sequence along a second direction. The second direction is opposite to the first direction. The second fastener (41) is installed on the water tank (a1) and connected to the fixed seat (a3). The second valve needle (42) is movably installed in the second fastener (41). The second sealing ring (43) is sleeved on the outer periphery of the second valve needle (42) and is in sealing cooperation with the second fastener (41). The second connector (45) is installed in the second fastener (41). The second spring (44) is sleeved on one end of the second valve needle (42) close to the second connector (45) and abuts against the second connector (45). Under the action of the second spring (44), the second valve needle (42) maintains elastic contact with the second fastener (41) through the second sealing ring (43).

9. The gas cylinder type coffee machine according to any one of claims 1-5, characterized in that, It further includes a first housing (d), a second housing (e), and a base (f). The base (f) is in contact with an external mounting surface. The first housing (d) is installed on the upper end surface of the base (f) and extends vertically upward perpendicular to the base (f). The second housing (e) is installed on one side surface of the first housing (d) and extends horizontally perpendicular to the first housing (d). The main unit (a) is installed through the second housing (e) and is parallel to the first housing (d). The gas cylinder (c) is installed on the puncturing system (g), and the puncturing system (g) is installed on the first housing (d).

10. The gas cylinder type coffee machine according to claim 9, characterized in that, It further includes an electronic control system (h), and the electronic control system (h) includes a display screen (h1), a control circuit board (h2) and a battery (h3). The control circuit board (h2) and the battery (h3) are installed inside the first housing (d), and the display screen (h1) is installed on the surface of the first housing (d) and can at least be used to display the pressure values detected by the high-pressure sensor (b4) and the low-pressure sensor (b5). The control circuit board (h2) is electrically connected to the battery (h3), the display screen (h1), the high-pressure sensor (b4), the low-pressure sensor (b5) and the puncturing system (g).

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