Italian coffee machine

Abstract

The Italian coffee machine comprises a main machine, a high-pressure air source and an air path system, the main machine comprises a water bin and a coffee extraction bin which are communicated through a one-way valve mechanism, the input end of the air path system is communicated with the output end of the high-pressure air source, and the output end of the air path system is communicated to the water bin. The gas path system can depressurize the high-pressure gas and convey the depressurized low-pressure gas to the top of the water sump; the gas path system comprises a high-pressure pipeline, a gas pressure reduction mechanism and a low-pressure pipeline, the input end of the high-pressure pipeline is connected with the output end of the high-pressure gas source, the output end is connected with a high-pressure cavity of the gas pressure reduction mechanism, the low-pressure cavity of the gas pressure reduction mechanism is connected with the input end of the low-pressure pipeline, and the output end of the low-pressure pipeline is communicated to the water sump. The Italian 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] This utility model relates to the field of daily necessities technology, and in particular to an Italian coffee machine. Background Technology

[0002] Currently, coffee machines on the market are mainly divided into two categories based on their pressurization principle: active pressurization and passive pressurization. Different principles directly affect the coffee extraction effect and applicable scenarios.

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

[0004] Passive pressure coffee machines are mainly divided into the following types: 1. Drip coffee (gravity driven), the principle is that hot water naturally permeates the coffee grounds by gravity; 2. Siphon coffee (vacuum principle), the principle is that the bottom is heated to make the water expand and rise, mix with the coffee grounds, and then cool to form a vacuum, and the liquid falls back; 3. French press (immersion + filtration), the principle is that the coffee grounds are steeped and then filtered through a filter.

[0005] The aforementioned active pressure coffee machines have the disadvantage of being large in size, while passive pressure coffee machines have the disadvantage of not being able to pressurize and bring out the aroma of coffee. Coffee machines that use high-pressure gas as a gas source have appeared on the market. The principle is to pressurize the hot water by inputting high-pressure gas into the water tank, and push the hot water through the coffee grounds. It does not require the use of pumps or piston devices, so it has the advantage of being small in size. At the same time, it can provide the gas pressure required for extraction and can extract the aroma of coffee.

[0006] High-pressure gas is used as the gas source, and the high-pressure gas needs to be depressurized before it can be used. However, the depressurization device used in existing coffee machines is generally set up independently of the coffee machine. That is, the coffee machine is connected to the depressurization device mentioned in patents such as CN204062068U and CN205654929U in an external way. As a result, although the coffee machine is small in size, the coffee machine with the external depressurization device has the disadvantages of being large in size, not aesthetically pleasing, and unable to be integrated with the coffee machine. Utility Model Content

[0007] The purpose of this invention is to provide an espresso machine that can at least solve one of the above-mentioned problems.

[0008] According to one aspect of the present invention, an espresso machine is provided, including a main unit, a high-pressure gas source and a gas path system. The main unit includes a water tank and a coffee extraction chamber connected by a one-way valve mechanism. The input end of the gas path system is connected to the output end of the high-pressure gas source, and the output end of the gas path system is connected to the water tank. The gas path system is capable of depressurizing the high-pressure gas and delivering the depressurized low-pressure gas to the top of the water tank.

[0009] The gas system includes a high-pressure pipeline, a gas pressure reducing mechanism, and a low-pressure pipeline. The input end of the high-pressure pipeline is connected to the output end of the high-pressure gas source, 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 connected to the water tank.

[0010] In some embodiments, the espresso machine also includes a puncture system, with a high-pressure gas source being a gas cylinder installed in the puncture system. The puncture system cooperates with the gas cylinder and is used to puncture the gas cylinder. The input end of the gas path system is connected to the gas output end of the puncture system. The puncture system includes a mounting bracket, a gas cylinder positioning mechanism, a drive mechanism, and a puncture mechanism. The gas cylinder positioning mechanism includes a fifth mounting groove that cooperates with the gas cylinder's positioning. The drive mechanism is used to drive the gas cylinder to move up, down, and horizontally. The puncture mechanism cooperates with the gas cylinder and is used to puncture the gas cylinder.

[0011] In some embodiments, the drive mechanism includes a lifting drive assembly and a horizontal drive assembly. The lifting drive assembly is connected to the gas cylinder positioning mechanism and is used to drive the gas cylinder to move up and down in the height direction. The horizontal drive assembly cooperates with the gas cylinder and is used to drive the gas cylinder to translate in the horizontal direction.

[0012] The lifting drive assembly includes a first drive component, a first transmission module, and a movable frame. The movable frame is movably mounted on the mounting frame. The first drive component is mounted on the mounting frame and is connected to 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.

[0013] The horizontal drive assembly includes a second drive component, a second transmission module, and a top cylinder. The second drive component is connected to the second transmission module, the second transmission module is connected to the top cylinder, and the top cylinder is engaged with the gas cylinder.

[0014] 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 connected to the puncture mechanism and the horizontal drive assembly respectively. The inner bracket is fitted inside the outer bracket and its bottom is connected to the movable frame. The top of the inner bracket is provided with a first contour groove that cooperates with the gas cylinder limit. The first contour groove and the outer bracket together form a fifth mounting groove.

[0015] The inner bracket includes a top block, a support seat, a fourth spring, and a guide pin. The top block is movably mounted above the support seat and guided by the guide pin. A first limiting groove is provided at the bottom of the top block, and the fourth spring is installed in the first limiting groove and abuts against the top block and the support seat respectively.

[0016] The puncture mechanism includes a second mounting base, a puncture needle, and an output tube. The second mounting base has a through hole that matches the mouth of the gas cylinder. The puncture needle is installed in the second mounting base with its head extending into the through hole. The first end of the output tube extends into the second mounting base, and the second end is connected to a high-pressure pipeline. The center of the puncture needle has a gas passage that communicates with the output tube.

[0017] In some embodiments, the gas pressure reducing mechanism includes a first valve seat, a valve stem, an air inlet, a floating plug assembly, and an adjusting knob. The first valve seat has a high-pressure chamber and a low-pressure chamber. The air inlet is installed in the first valve seat and separates the high-pressure chamber and the low-pressure chamber. An air inlet channel is provided in the air inlet, and an air hole is provided at the end of the air inlet channel. The valve stem is fitted onto the first valve seat. The floating plug assembly is installed at the first end of the valve stem and cooperates with the outlet end of the air hole. The floating plug assembly can always maintain elastic contact with the air inlet. The adjusting knob is installed at the second end of the valve stem and can drive the valve stem to rotate.

[0018] In some embodiments, the floating plug assembly includes a floating rod and an elastic element. One end of the floating rod is movably fitted onto the valve stem, and the other end engages with the air orifice. The elastic element is fitted onto the outer periphery of the floating rod, and its two ends abut against the valve stem and the floating rod, respectively. Under the action of the elastic element, the floating rod always maintains elastic contact with the air inlet.

[0019] In some embodiments, the gas pressure reducing mechanism further includes a bearing, a third limiting boss is formed at the end of the floating rod away from the valve stem, the third limiting boss is movably installed in the low-pressure chamber and cooperates with the gas port, the bearing is installed at the end of the valve stem away from the adjusting knob and is fitted on the outer periphery of the floating rod, and the first end of the elastic element abuts against the third limiting boss and the second end abuts against the bearing.

[0020] In some embodiments, the main unit also includes a fixed base, a coffee bowl, a third mounting base, and a third sealing ring. The fixed base is located at the bottom of the water tank, and the third mounting base is located at the bottom of the fixed base and is detachably connected to the fixed base. The third sealing ring is fitted into the fixed base, and the coffee bowl is fitted into the third mounting base and can be pressed tightly against the third sealing ring by the third mounting base. The coffee bowl is used to hold coffee powder. The coffee bowl and the fixed base together form a coffee extraction chamber. An air inlet pipe is installed on the fixed base. The first end of the air inlet pipe is connected to the output end of the low-pressure pipeline, and the second end passes through the water tank and extends to the top of the water tank.

[0021] In some embodiments, the main unit also includes a balancing valve mechanism, a one-way valve mechanism forming a first channel connecting the water tank and the coffee extraction chamber, and a balancing valve mechanism forming a second channel connecting the water tank and the coffee extraction chamber, with the one-way valve mechanism and the balancing valve mechanism arranged in opposite directions.

[0022] 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 arranged sequentially along a first direction. The first fastener is installed in the water tank and connected to the fixed base. The first valve needle is movably installed in the fixed base. The first sealing ring is fitted around the outer periphery of the first valve needle and seals against the fixed base. The first connector is installed in the fixed base. The first spring is fitted around the end of the first valve needle near the first connector and abuts against the first connector. Under the action of the first spring, the first valve needle maintains elastic contact with the fixed base through the first sealing ring.

[0023] The balancing valve mechanism includes a second fastener and a second valve needle, a second sealing ring, a second spring, and a second connector arranged sequentially along a second direction, which is opposite to the first direction. The second fastener is installed in the water tank and connected to the fixed base. The second valve needle is movably installed inside the second fastener. The second sealing ring is fitted around the outer periphery of the second valve needle and seals with the second fastener. The second connector is installed inside the second fastener. The second spring is fitted around the end of the second valve needle near the second connector and abuts against the second connector. Under the action of the second spring, the second valve needle maintains elastic contact with the second fastener through the second sealing ring.

[0024] In some embodiments, the espresso machine also includes a first housing, a second housing, and a base. The base contacts an external mounting surface. The first housing is mounted on the upper surface of the base and extends upward perpendicularly to the base. The second housing is mounted on one side of the first housing and extends horizontally perpendicularly to the first housing. The main unit is mounted through the second housing and is parallel to the first housing.

[0025] In some embodiments, the espresso machine also includes an electronic control system, which includes a display screen, a control circuit board, and a battery. The gas system also includes a high-pressure sensor and a low-pressure sensor. The high-pressure sensor works with the high-pressure pipeline to detect the pressure value of the high-pressure gas in the high-pressure pipeline, and the low-pressure sensor works with the low-pressure pipeline to detect the pressure value of the low-pressure gas in the low-pressure pipeline. The control circuit board and the battery are installed inside the first housing, and the display screen is installed on the surface of the first housing and is at least capable of displaying 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 puncture system.

[0026] The beneficial effects of this utility model are:

[0027] This utility model provides a novel Italian coffee machine that integrates an automatic puncture structure, a pressure reduction structure, a balance valve structure, and a pressure relief structure into one unit. It is not only highly functional, but also has a simple and beautiful overall appearance, small size, and small space occupation.

[0028] This invention can use a gas cylinder or an external air pump as a high-pressure gas source. Compared with the traditional coffee machine that uses a water pump for pressurization, it has many advantages such as low power consumption, low noise, and stable pressure. More importantly, it can greatly reduce the space occupied, making the machine small in size. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the espresso machine according to Embodiment 1 of this utility model;

[0030] Figure 2 for Figure 1 The diagram shows a partial exploded structure of an espresso machine.

[0031] Figure 3 for Figure 1 The diagram shows a three-dimensional structure of the first and second casings of an espresso machine in a transparent state.

[0032] Figure 4 This is a three-dimensional structural diagram of the puncture system of this utility model;

[0033] Figure 5 for Figure 4 The diagram shown is a three-dimensional structural representation of the puncture system omitting the gas cylinder.

[0034] Figure 6 for Figure 5 The diagram shows a top view of the structure.

[0035] Figure 7 for Figure 6 The schematic diagram of the cross-sectional structure along the AA direction is shown.

[0036] Figure 8 for Figure 7 The enlarged structural diagram at point B is shown below;

[0037] Figure 9 for Figure 5 One of the three-dimensional structural diagrams of the partial structure shown;

[0038] Figure 10 for Figure 5 The second schematic diagram of the three-dimensional structure shown;

[0039] Figure 11 This is an exploded structural diagram of the gas cylinder positioning mechanism of this utility model;

[0040] Figure 12 This is a three-dimensional structural diagram of the air circuit system and the main unit of this utility model;

[0041] Figure 13 This is a three-dimensional structural diagram of the gas path system of this utility model;

[0042] Figure 14 for Figure 13 The diagram shows a front view of the gas path system.

[0043] Figure 15 for Figure 14 A schematic diagram of the cross-sectional structure along the CC direction is shown.

[0044] Figure 16 This is a three-dimensional structural diagram of the gas pressure reducing mechanism of this utility model;

[0045] Figure 17 for Figure 16 The diagram shown is a top-down view of the structure.

[0046] Figure 18 for Figure 17 The schematic diagram of the cross-sectional structure along the DD direction is shown.

[0047] Figure 19 This is a schematic diagram of the exploded structure of the gas pressure reducing mechanism of this utility model;

[0048] Figure 20 This is a three-dimensional structural diagram of the first valve seat of this utility model;

[0049] Figure 21 This is a three-dimensional structural diagram of the main unit of this utility model with the compartment cover omitted;

[0050] Figure 22 for Figure 21 The diagram shows a top view of the structure.

[0051] Figure 23 for Figure 22 The diagram shows a cross-sectional view of the structure along the EE direction;

[0052] Figure 24 for Figure 23 The diagram shows an enlarged view of the structure at point F.

[0053] Figure 25 for Figure 23 The diagram shows an enlarged view of the structure at point G.

[0054] Figure 26 This is a three-dimensional structural diagram of the espresso machine according to Embodiment 2 of this utility model.

[0055] Figures 1-26Figure labels in the diagram:

[0056] a-Main unit; b-Gas system; c-Gas cylinder; d-First housing; e-Second housing; f-Base; g-Piercing system; h-Electrical control system; i-Air pump; a1-Water tank; a2-Coffee extraction chamber; a3-Fixing base; a4-Powder container; a5-Third mounting base; a6-One-way valve mechanism; a7-Balance valve mechanism; a8-Third sealing ring; a9-Diverter; a10-Capsule 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 Connecting block; b9-Third connecting block; b10-Fourth connecting block; h1-Display screen; h2-Control circuit board; h3-Battery; a31-First mounting slot; a32-First through slot; a33-Second mounting slot; a34-Third through hole; a35-Third mounting slot; a311-First tapered part; a331-Second tapered part; b31-Intake 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;

[0057] The following are the reference numerals for the puncture system g:

[0058] 11-Gas cylinder positioning mechanism; 12-Drive mechanism; 13-Piercing mechanism; 14-Mounting bracket; 15-First sensing mechanism; 16-Second sensing mechanism; 110-Fifth mounting slot; 111-Outer bracket; 112-Inner bracket; 121-Lifting drive assembly; 122-Horizontal drive assembly; 131-Second mounting base; 132-Piercing needle; 133-Output tube; 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 drive element; 1212-First transmission module; 1213-Guide module ; 1214-Modible frame; 1215-Elastic buffer module; 1221-Second driving component; 1222-Second transmission module; 1223-Top cylinder; 1224-First mounting base; 1225-Magnetic suction component; 1311-Through hole; 1312-Second limiting groove; 1321-Air passage; 1121a-First contouring groove; 1121b-First limiting groove; 1212a-First screw; 1212b-Nut; 1213a-Guide sleeve; 1213b-Guide rod; 1215a-Connector; 1215b-Third spring; 1222a-First bevel gear; 1222b-Second bevel gear; 1222c-Second screw; 1223a-Second contouring groove;

[0059] The following are the reference numerals for the gas pressure reducing mechanism b2:

[0060] 21-First valve seat; 22-Valve stem; 23-Air inlet; 24-Floating plug assembly; 25-Adjusting knob; 26-Bearing; 27-Sealing cap; 211-High pressure chamber; 212-Low pressure chamber; 213-Second threaded connection; 214-Fourth threaded connection; 215-First connecting hole; 216-Second connecting hole; 221-First threaded connection; 222-Guide groove; 231-Air inlet channel; 232-Air hole; 233-Third threaded connection; 241-Floating rod; 242-Elastic element; 243-Plug plate; 242a-Disc spring; 241a-Third limiting boss;

[0061] The following are the reference numerals for the one-way valve mechanism a6:

[0062] 30-First channel; 31-First fastener; 32-First valve needle; 33-First sealing ring; 34-First spring; 35-First connector; 311-First through hole; 321-First limiting boss; 351-Second through hole;

[0063] The following are the reference numerals for the balance valve mechanism a7:

[0064] 40-Second channel; 41-Second fastener; 42-Second valve needle; 43-Second sealing ring; 44-Second spring; 45-Second connector; 411-Second guide groove; 412-Fourth mounting groove; 421-Second limiting boss; 441-Fourth through hole; 412a-Third tapered part. Detailed Implementation

[0065] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0066] Example 1

[0067] Figures 1-25 An espresso machine according to one embodiment of the present invention is shown schematically.

[0068] like Figures 1-25 As shown, the espresso machine includes a main unit a, a high-pressure gas source, and a gas path system b. The main unit a includes a water tank a1 and a coffee extraction chamber a2 connected by a one-way valve mechanism a6. The input end of the gas path system b is connected to the output end of the high-pressure gas source, and the output end of the gas path system b is connected to the water tank a1. The gas path system b can depressurize the high-pressure gas and deliver the depressurized low-pressure gas to the top of the water tank a1.

[0069] The gas 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 output end of the high-pressure gas source, 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.

[0070] In this embodiment, the high-pressure gas source is gas cylinder c.

[0071] Preferably, the main unit a in this embodiment further includes a fixed base a3, a coffee bowl a4, a third mounting base a5, and a third sealing ring a8. The fixed base a3 is disposed at the bottom of the water tank a1, the third mounting base a5 is disposed at the bottom of the fixed base a3 and is detachably connected to the fixed base a3, the third sealing ring a8 is fitted onto the fixed base a3, the coffee bowl a4 is fitted into the third mounting base a5 and can be pressed tightly against the third sealing ring a8 by the third mounting base a5, the coffee bowl a4 is used to hold coffee powder, and the coffee bowl a4 and the fixed base a3 together form a coffee extraction chamber a2. An air inlet pipe b31 is installed on the fixed base a3. The first end of the air inlet pipe b31 is connected to the output end of the low-pressure pipe b3, and the second end passes through the water tank a1 and extends to the top position inside the water tank a1. Thus, the hot water in the water tank a1 flows out from the bottom of the water tank a1 into the coffee bowl a4, and after contacting the coffee powder in the coffee bowl a4, coffee liquid is obtained. The coffee liquid flows out from the filter hole at the bottom of the coffee bowl a4.

[0072] Preferably, the main unit a in this embodiment further includes a diverter a9, which is installed on the fixed base a3 and located at the outlet end of the one-way valve mechanism a6. The diverter a9 serves to divert the flow, allowing hot water to flow into the powder bowl a4 from both sides.

[0073] Preferably, the espresso machine of this embodiment further includes a first housing d, a second housing e, and a base f. The base f contacts the external mounting surface. The first housing d is mounted on the upper surface of the base f and extends upward perpendicularly to the base f. The second housing e is mounted on one side of the first housing d and extends horizontally perpendicularly to the first housing d. The main unit a is mounted through the second housing e and parallel to the first housing d. The gas cylinder c is mounted on the puncture system g, which is mounted on the first housing d. Therefore, the main frame of the espresso machine of this embodiment has a U-shaped structure, a simple and elegant appearance, and perfectly conceals and hides most of the components, resulting in a strong aesthetic appeal.

[0074] Preferably, the espresso machine also includes an electronic control system h, which includes a display screen h1, a control circuit board h2, and a battery h3. The gas path system b also includes a high-pressure sensor b4 and a low-pressure sensor b5. The high-pressure sensor b4 works with the high-pressure pipeline b1 to detect the pressure value of the high-pressure gas in the high-pressure pipeline b1, and the low-pressure sensor b5 works with the low-pressure pipeline b3 to detect the pressure value of the low-pressure gas in the low-pressure pipeline b3. The control circuit board h2 and the battery h3 are installed inside the first housing d. The display screen h1 is installed on the surface of the first housing 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 electronic control components of the puncture system g.

[0075] Preferably, the display screen h1 may include two TFT display modules, which are used to display the air pressure values ​​detected by the high-pressure sensor b4 and the low-pressure sensor b5, respectively.

[0076] Preferably, the electronic control system h also includes a TYPEC interface and a power switch mounted on the first housing d and electrically connected to the control circuit board h2.

[0077] The espresso machine in this embodiment also includes a puncture system g, and the high-pressure gas source in this embodiment is a gas cylinder c. Specifically, gas cylinder c can be a commercially available carbon dioxide cylinder or nitrogen cylinder, preferably with a capacity of 8g. Gas cylinder c is installed on the puncture system g, and the puncture system g cooperates with gas cylinder c and is used to puncture gas cylinder c. The input end of the gas path system b is connected to the gas output end of the puncture system g.

[0078] like Figure 4-11 As shown, the puncture system g in this embodiment includes a gas cylinder positioning mechanism 11, a driving mechanism 12, and a puncture mechanism 13. The gas cylinder positioning mechanism 11 includes a fifth mounting groove 110 that cooperates with the gas cylinder c for limiting. The driving mechanism 12 is used to drive the gas cylinder c to move up, down, and horizontally. The puncture mechanism 13 cooperates with the gas cylinder c and is used to puncture the gas cylinder c.

[0079] The drive mechanism 12 includes a lifting drive assembly 121 and a horizontal drive assembly 122. The lifting drive assembly 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 drive assembly 122 cooperates with the gas cylinder c and is used to drive the gas cylinder c to move horizontally.

[0080] Preferably, the puncture system g also includes a mounting bracket 14, which is fixedly mounted to the first housing d by screws or other fasteners. The lifting drive assembly 121 includes a first drive component 1211, a first transmission module 1212, a guide module 1213, and a movable frame 1214. The movable frame 1214 is movably mounted to the mounting bracket 14 via the guide module 1213. The first drive component 1211 is mounted to the mounting bracket 14 and is connected to 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.

[0081] As a further preferred embodiment, the first driving component 1211 in this embodiment is a servo motor.

[0082] Preferably, the guide module 1213 includes a guide sleeve 1213a mounted on the mounting frame 14 and a guide rod 1213b fitted onto the guide sleeve 1213a and fixedly connected to the movable frame 1214.

[0083] As a further preferred embodiment, the number of both guide rods 1213b and guide sleeves 1213a can be four.

[0084] Preferably, the first transmission module 1212 includes a first screw 1212a and a nut 1212b. The first screw 1212a is connected to the drive end of the first drive member 1211 via a coupling or the like. The nut 1212b is fitted around the outer periphery of the first screw 1212a and is connected to the movable frame 1214.

[0085] Preferably, the lifting drive assembly 121 further includes an elastic buffer module 1215, which includes a connector 1215a and a third spring 1215b. The nut 1212b is connected to the movable frame 1214 through the connector 1215a, and the third spring 1215b is fitted around the outer periphery of the connector 1215a and located between the nut 1212b and the movable frame 1214.

[0086] As a further preferred option, the connector 1215a is a screw and there are four of them.

[0087] The connector 1215a of the elastic buffer module 1215 serves a connecting function, while the third spring 1215b provides a buffering function. Since the movable frame 1214 is movable, and the gas cylinder positioning mechanism 11 is positioned above the movable frame 1214, when the gas cylinder c is installed, due to the weight of the gas cylinder c and the external force applied by the user, these forces act on the gas cylinder positioning mechanism 11 and are then transferred to the movable frame 1214. The third spring 1215b of the elastic buffer module 1215 converts these forces into spring force, thus providing a buffering effect. The elastic buffer module 1215 of this embodiment has both connecting and buffering functions, is small in size, and highly functional.

[0088] 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 connected to the puncture mechanism 13 and the horizontal drive assembly 122 respectively. The inner bracket 112 is fitted 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 contour groove 1121a that cooperates with the gas cylinder c for positioning. The first contour groove 1121a and the outer bracket 111 together form a fifth mounting groove 110.

[0089] Preferably, the inner bracket 112 includes a top block 1121, a support seat 1122, a fourth spring 1123, and a guide pin 1124. The top block 1121 is movably mounted above the support seat 1122 and guided by the guide pin 1124. One end of the guide pin 1124 is threadedly connected to the support seat 1122, and the other end is slidably engaged with the top block 1121. A first limiting groove 1121b is provided 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 support seat 1122 respectively.

[0090] Preferably, the horizontal drive assembly 122 includes a second drive member 1221, a second transmission module 1222, and a top cylinder 1223. The second drive member 1221 is connected to 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.

[0091] As a further preferred embodiment, the second driving component 1221 in this embodiment is a servo motor.

[0092] Preferably, the horizontal drive assembly 122 further includes a first mounting base 1224, which 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 drive end of the second drive member 1221. The second bevel gear 1222b meshes with the first bevel gear 1222a. The second screw 1222c is fitted onto the second bevel gear 1222b. Both the first bevel gear 1222a and the second bevel gear 1222b are rotatably mounted on the first mounting base 1224. The top cylinder 1223 is movably fitted onto the outer periphery of the second screw 1222c and slides with the first mounting base 1224.

[0093] Preferably, the top cylinder 1223 has a second contoured groove 1223a that cooperates with the tail of the gas cylinder c. The bottom of the second contoured groove 1223a is provided with a magnetic suction element 1225 that cooperates with the gas cylinder c. Thus, the magnetic suction element 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, and the gas cylinder c needs to be removed from the fifth mounting slot 110, the horizontal drive component 122 works, driving the top cylinder 1223 to retract and reset. At this time, the magnetic suction element 1225 will attract the gas cylinder c and drive the gas cylinder c to retract together. The top seat will also retract and reset under the action of the fourth spring 1123. At this time, the lifting drive component 121 can drive the inner bracket 112 and the gas cylinder c to rise together.

[0094] Preferably, the puncture 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 element 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 element 162 mounted on the top cylinder 1223 and cooperating with the second sensor 161.

[0095] As a further preferred embodiment, the first sensor 151 and the second sensor 161 are each a pair. The pair of first sensors 151 are disposed on the upper and lower sides of the first sensing element 152, and the pair of second sensors 161 are disposed on the left and right sides of the second sensing element 162. The first sensor 151 and the second sensor 161 are commercially available microswitches, proximity switches, or photoelectric sensors, etc., and the first sensing element 152 and the second sensing element 162 are sheet-like sensing elements.

[0096] Preferably, the puncture mechanism 13 includes a second mounting base 131, a puncture needle 132, and an output tube 133. The second mounting base 131 has a through hole 1311 that mates with the mouth of the gas cylinder c. The puncture needle 132 is installed in the second mounting base 131 with its head extending into the through hole 1311. The second mounting base 131 has a second limiting groove 312 that mates with the output tube 133. The first end of the output tube 133 extends into the second limiting groove 312 of the second mounting base 131, and the second end is connected to the input end of the high-pressure pipeline b1.

[0097] Preferably, the needle 132 has a gas passage 1321 at its center that is connected to the output pipe 133.

[0098] The working principle of the puncture system g in this embodiment is as follows:

[0099] First, the gas cylinder c is placed into the fifth mounting slot 110. Then, the lifting drive assembly 121 operates. The first drive component 1211 drives the first screw 1212a to rotate, causing the nut 1212b to move downwards along the first screw 1212a. Since the nut 1212b is connected to the movable frame 1214, which is connected to the inner bracket 112, the downward movement of the nut 1212b pulls the movable frame 1214 and the inner bracket 112 downwards together. During the movement, the guide rod 1213b moves relative to the guide sleeve 1213a, playing a guiding role and ensuring smooth operation during the downward movement. The first sensing mechanism 15 plays a position detection role, ensuring accurate downward movement to the designated position. When the inner bracket 112 moves to the designated position, the mouth of the gas cylinder c is exactly aligned with the through hole 1311 of the puncture mechanism 13. At this time, the lifting... The downward drive assembly 121 stops operating; the horizontal drive assembly 122 operates, the second drive member 1221 drives the first bevel gear 1222a to rotate, the first bevel gear 1222a drives the second bevel gear 1222b to rotate, so that the second screw 1222c moves relative to the second bevel gear 1222b toward 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 face of the second mounting base 131 plays a guiding role in the translation of the top cylinder 1223. After the top cylinder 1223 translates to contact the gas cylinder c, the second contour groove 1223a fits with the tail of the gas cylinder c. The top cylinder 1223 continues to translate, which will push the gas cylinder c to translate together. The mouth of the gas cylinder c extends into the through hole 1311 of the puncture mechanism 13 and contacts the puncture needle 132 to complete the puncture.

[0100] When the gas in cylinder c is used up and needs to be replaced, or when cylinder c needs to be removed for other reasons, the horizontal drive assembly 122 works first, and the second drive component 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 move and reset. Since the second contour groove 1223a of the top cylinder 1223 is provided with a magnetic suction component 1225, the gas cylinder c is attracted to the top cylinder 1223 at this time. The translation of the top cylinder 1223 will drive the gas cylinder c to move together, and the gas cylinder c will move backward and reset. Due to the setting of the fourth spring 1123, the top seat will also move backward and reset under the action of the fourth spring 1123. Then the lifting drive assembly 121 works, driving the movable frame 1214 and the inner bracket 112 to move upward. After moving into place, the gas cylinder c can be removed.

[0101] like Figures 12-20 As shown, the gas pressure reducing mechanism b2 of this embodiment includes a first valve seat 21, a valve stem 22, an air inlet 23, a floating plug assembly 24, and an adjustment knob 25. The first valve seat 21 has a high-pressure chamber 211 and a low-pressure chamber 212. The air inlet 23 is installed in the first valve seat 21 and separates the high-pressure chamber 211 and the low-pressure chamber 212. An air inlet channel 231 is provided in the air inlet 23, and an air hole 232 is provided at the end of the air inlet channel 231. The valve stem 22 is fitted into the first valve seat 21. The floating plug assembly 24 is installed at the first end of the valve stem 22 and cooperates with the air outlet end of the air hole 232. The floating plug assembly 24 can always maintain elastic contact with the air inlet 23. The adjustment knob 25 is installed at the second end of the valve stem 22 and can drive the valve stem 22 to rotate.

[0102] Preferably, the floating blockage assembly 24 includes a floating rod 241 and an elastic element 242. One end of the floating rod 241 is movably fitted onto the valve stem 22, and the other end cooperates with the air hole 232. The elastic element 242 is fitted onto the outer periphery of the floating rod 241, and its two ends abut against the valve stem 22 and the floating rod 241 respectively. Under the action of the elastic element 242, the floating rod 241 always maintains elastic contact with the air inlet 23.

[0103] Preferably, the valve stem 22 has a guide groove 222 at the end away from the adjusting knob 25, which is matched with the limit of the floating rod 241.

[0104] Preferably, the elastic element 242 includes at least one set of disc springs 242a.

[0105] As a further preferred embodiment, the disc springs 242a in this embodiment are in two sets, and each set of disc springs 242a includes two disc springs combined in an opposing manner.

[0106] Preferably, the end of the floating rod 241 away from the valve stem 22 is provided with a third limiting boss 241a. 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.

[0107] Preferably, the gas pressure reducing mechanism b2 also includes a bearing 26, which is mounted on the end of the valve stem 22 away from the adjusting knob 25 and fitted around the outer periphery of the floating rod 241, with the two ends of the elastic element 242 abutting against the bearing 26.

[0108] As a further preferred option, bearing 26 is a commercially available F4-8M miniature thrust ball bearing 26. It can achieve high axial load and high stiffness in a very small space.

[0109] Preferably, the floating block assembly 24 further includes a block plate 243, which is installed at the center of one end face of the floating rod 241 near the air inlet 23 and cooperates with the air hole 232.

[0110] As a further preferred embodiment, the blocking plate 243 is made of PTFE gasket. PTFE gaskets have excellent properties such as corrosion resistance, aging resistance, and non-conductivity. They also exhibit good mechanical strength between -100℃ and 100℃. In this embodiment, the PTFE gasket enables soft contact with the air inlet 23, which not only avoids direct contact between the floating rod 241 and the air inlet 23, reducing friction and extending service life, but also provides good sealing performance after blocking, preventing air leakage and cross-contamination.

[0111] Preferably, the valve stem 22 is threadedly connected to the first valve seat 21.

[0112] As a further preferred embodiment, the outer wall of the valve stem 22 is provided with a first threaded connection portion 221, and the inner wall of the first valve seat 21 is provided with a second threaded connection portion 213 that cooperates with the first threaded connection portion 221.

[0113] Preferably, the air inlet 23 is threadedly connected to the first valve seat 21.

[0114] As a further preferred embodiment, the outer wall of the air inlet 23 is provided with a third threaded connection portion 233, and the inner wall of the first valve seat 21 is provided with a fourth threaded connection portion 214 that cooperates with the third threaded connection portion 233.

[0115] Preferably, the gas pressure reducing mechanism b2 also includes a sealing cover 27, which is fixedly installed on the end face of the first valve seat 21 away from the valve stem 22 by fasteners such as screws and is sealed to the first valve seat 21 by a fourth sealing ring. The first valve seat 21, the air inlet 23 and the sealing cover 27 together form a high-pressure chamber 211.

[0116] In addition, to achieve this, the first valve seat 21 of this embodiment is also provided with a first connection hole 215 for connecting to the high-pressure pipeline b1 and a second connection hole 216 for connecting to the low-pressure pipeline b3. The first connection hole 215 is connected to the high-pressure chamber 211 and the second connection hole 216 is connected to the low-pressure chamber 212.

[0117] refer to Figure 12-15 Preferably, the air circuit system b further includes a pressure relief mechanism b6, which is installed at the 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 cavity is formed in the second valve seat b621. The first port of the four-way cavity is connected to the low-pressure pipeline b3, the second port is connected to the air intake pipe b31, the third port is used to install the pressure relief knob b61, and the fourth port is used to install the pressure relief valve module b622. The needle b6221 is movably installed inside the second valve seat b621. The fifth sealing ring b6222 is fitted around the outer periphery of the third valve needle b6221 and seals against the second valve seat b621. The third connector b6224 is installed inside the second valve seat b621. The fifth spring b6223 is fitted around the end of the third valve needle b6221 near the third connector b6224 and abuts against the third connector b6224. Under the action of the fifth spring b6223, the third valve needle b6221 maintains elastic contact with the second valve seat b621 through the fifth sealing ring b6222, thereby enabling the opening and closing of the fourth port of the four-way chamber. After the fourth port is opened, the gas in the low-pressure pipeline b3 is directly discharged from the central channel of the third connector b6224, achieving the purpose of pressure relief.

[0118] Preferably, the pneumatic system b further includes a first connecting block b7, a second connecting block b8, a third connecting block b9, and a fourth connecting block b10. The first connecting block b7 has a four-way cavity. The first port of this four-way cavity is connected to the output pipe 133 of the puncture mechanism 13, the second port is connected to the high-pressure pipeline b1, the third port is connected to the high-pressure sensor b4, and the fourth port is a threaded external interface for connecting an external air pump (such as a Xiaomi air pump) or other air sources. The second connecting block b8 has a two-way cavity, mainly for enabling the high-pressure pipeline b1 to turn and extend in size. The third connecting block b9 is installed on the side wall of the first valve seat 21, and its inner wall has a three-way cavity. The first port of this three-way cavity is connected to the low-pressure cavity 212 of the first valve seat 21, the second port is connected to the fourth connecting block b10 through the low-pressure pipeline b3, and the third port is connected to the second valve seat b621 of the pressure relief mechanism b6 through the low-pressure pipeline b3. The fourth connecting block b10 is provided with a two-way cavity. The first channel of the two-way cavity is connected to the low-pressure sensor b5, and the second channel is connected to the low-pressure pipeline b3.

[0119] The working principle of the gas pressure reducing mechanism b2 in this embodiment is as follows:

[0120] This embodiment uses gas cylinder C as a high-pressure gas source for illustration. Gas cylinder C can be a commercially available 8g carbon dioxide cylinder. The pressure range of the high-pressure gas in gas cylinder C is 60-70 bar. Professional espresso machines mainly use hot water at around 93 degrees Celsius to apply a pressure of 9 bar to impregnate and brew coffee grounds, producing a rich and aromatic espresso.

[0121] Assuming the pressure of the high-pressure gas output from gas cylinder c is P1, the pressure of the low-pressure gas entering the low-pressure chamber 212 from the high-pressure chamber 211 is P0, and the pressure of the air inlet 23 pressed by the preset floating plug component 24 is P2, then P0 should satisfy: P0≤P1-P2.

[0122] The working principle of the gas pressure reducing mechanism b2 in this embodiment is as follows: Taking the output pressure of gas cylinder c as 65 bar (i.e., P1=65 bar) as an example, by adjusting the adjustment knob 25 and setting the elastic element 242, the clamping force of the floating block assembly 24 pressing 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 make the floating rod 241 of the floating block assembly 24 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 clamping force of the floating block assembly 24 pressing the air inlet 23, In other words, the high-pressure gas is passively depressurized, so that the actual pressure of the gas 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 gas pressure in the low-pressure chamber 212 is greater than 9 bar, the floating blocking component 24 can be reset under the action of the elastic element 242, and re-block the air hole 232 of the air inlet 23. In this way, it can be ensured that the gas entering the low-pressure chamber 212 can be stabilized at about 9 bar, thereby ensuring that the extraction pressure is stabilized at about 9 bar, which meets the extraction pressure requirements of professional espresso machines.

[0123] like Figure 21-25 As shown, the main unit a in this embodiment also includes a balance valve mechanism a7 installed between the water tank a1 and the fixed base a3. The one-way valve mechanism a6 forms a first channel 30 connecting the water tank a1 and the coffee extraction chamber a2. The balance valve mechanism a7 forms a second channel 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 opposite directions.

[0124] 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 sequentially along a first direction. The first fastener 31 is installed in 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 fitted around the outer periphery of the first valve needle 32 and seals against the fixed seat a3. The first connector 35 is installed in the fixed seat a3. The first spring 34 is fitted around the end of the first valve needle 32 near 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.

[0125] 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 arranged sequentially along a second direction, which is 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 fitted around the outer periphery of the second valve needle 42 and seals against the second fastener 41. The second connector 45 is installed in the second fastener 41. The second spring 44 is fitted around the end of the second valve needle 42 near 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.

[0126] Preferably, the first fastener 31 has a first through hole 311 inside, the fixing seat a3 has a first mounting groove a31, a first guiding groove a32 and a second mounting groove a33 arranged sequentially along the first direction, the first connector 35 has a second through hole 351 inside, the first through hole 311, the first mounting groove a31, the first guiding groove a32, the second mounting groove a33 and the second through hole 351 together form a first channel 30, the first fastener 31 is connected to the first mounting groove a31, the first valve needle 32 is movably installed in the first guiding groove a32 and its two ends extend into the first mounting groove a31 and the second mounting groove a33 respectively, the first connector 35 is installed in the second mounting groove a33, and the first spring 34 is pressed against the groove wall of the second mounting groove a33 by the first valve needle 32.

[0127] Preferably, the first fastener 31 is threadedly connected to the first mounting groove a31, and the first connector 35 is threadedly connected to the second mounting groove a33. This facilitates detachment.

[0128] As a further preferred embodiment, the first mounting groove a31 has a first thread on its groove wall, and the outer wall of the first fastener 31 near the fixed seat a3 has a second thread that mates with the first thread. The second mounting groove a33 has a third thread on its groove wall, and the outer wall of the first connector 35 has a fourth thread that mates with the third thread.

[0129] Preferably, the bottom of the first mounting groove a31 has a first conical portion a311, the top of the second mounting groove a33 has a second conical portion a331, the first guiding groove a32 connects the first conical portion a311 and the second conical portion a331, the first valve needle 32 has a first limiting boss 321, the first end face of the first limiting boss 321 contacts the first spring 34, 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 conical portion a331.

[0130] Preferably, the fixed base a3 has a third through hole a34 and a third mounting groove a35 arranged sequentially along the second direction, the second fastener 41 has a second guide groove 411 and a fourth mounting groove 412 arranged sequentially along the second direction, and the second connector 45 has a fourth through hole 451. The third through hole a34, the third mounting groove a35, the second guide groove 411, the fourth mounting groove 412 and the fourth through hole 451 together form the second channel 40. The second fastener 41 is connected to the third mounting groove a35. One end of the second valve needle 42 is movably installed in the second guide groove 411 and the second end extends into the fourth mounting groove 412. The second connector 45 is installed in the fourth mounting groove 412. The second spring 44 is pressed against the groove wall of the fourth mounting groove 412 by the second valve needle 42.

[0131] As a further preferred embodiment, both the first spring 34 and the second spring 44 are flared springs.

[0132] Preferably, the second fastener 41 is threaded to the third mounting groove a35, and the second connector 45 is threaded to the fourth mounting groove 412. This facilitates detachment.

[0133] As a further preferred embodiment, the wall of the third mounting groove a35 is provided with a fifth thread, and the outer wall of the second fastener 41 near the fixed seat a3 is provided with a sixth thread that mates with the fifth thread. The wall of the fourth mounting groove 412 is provided with a seventh thread, and the outer wall of the second connector 45 is provided with an eighth thread that mates with the seventh thread.

[0134] Preferably, the bottom of the fourth mounting groove 412 is formed with a third conical portion 412a, the second guide groove 411 connects the third conical portion 412a and the third mounting 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, 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 conical portion 412a.

[0135] As a further preferred option, the first sealing ring 33, the second sealing ring 43, and the third sealing ring a8 can all be silicone sealing rings.

[0136] In this embodiment, the balancing valve mechanism a7 achieves automatic pressure balancing between the water tank a1 and the coffee extraction chamber a2. The specific working principle is as follows:

[0137] When the pressure in 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, opening the first channel 30. The hot water in water tank a1 flows into coffee extraction chamber a2 through the first channel 30 and mixes with the coffee grounds in porta4 to obtain coffee liquid. After extraction is completed, the first valve needle 32 of the one-way valve mechanism a6 returns to its original position under the action of the first spring 34, pushing the first sealing ring 33 to block the first channel 30. Since the pressure in coffee extraction chamber a2 is greater than the pressure in water tank a1, the balance valve mechanism a7 operates, and the second valve needle 42 moves in the second direction, opening the second channel 40. The steam in coffee extraction chamber a2 can then flow into water tank a1 through the second channel 40. At this time, by removing the third mounting base a5 from the fixed base a3, porta4 can be directly removed for a second extraction or for cleaning coffee grounds.

[0138] like Figure 1-3 As shown, the main unit a in this embodiment also 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 sealed to the water tank a1 after being closed. The instrument panel of the thermometer a11 is installed on the side wall of the water tank a1, and the temperature probe extends into the interior of the water tank a1.

[0139] The working principle of the espresso machine in this embodiment is as follows:

[0140] Gas cylinder C is placed into the fifth mounting slot 110 of puncture system G. Puncture system G operates and automatically punctures gas cylinder C. After puncture, the high-pressure gas in gas cylinder C enters the gas pressure reducing mechanism B2 through the output pipe 133 and high-pressure pipeline B1. Gas pressure reducing mechanism B2 reduces the pressure of high-pressure gas. The reduced-pressure gas is then transported to the inlet pipe B31 through low-pressure pipeline B3. The low-pressure gas comes out from the outlet of inlet pipe B31 and pressurizes the water in water tank A1 from the top. Under the action of air pressure, the water in water tank A1 breaks through the one-way valve mechanism A6 and enters the coffee extraction chamber A2, where it comes into contact with the coffee powder in the coffee bowl A4, producing coffee liquid, which flows out from the bottom of coffee bowl A4 into the coffee cup placed on the base F.

[0141] The Italian coffee machine of this invention has at least the following advantages over the prior art:

[0142] 1. The Italian coffee machine of this utility model integrates an automatic puncture structure, a pressure reduction structure, a balance valve structure, and a pressure relief structure into one unit. It is not only highly functional, but also has a simple and beautiful overall appearance, small size, and small space occupation.

[0143] 2. This utility model provides a novel gas path system b, which is used to reduce the pressure of high-pressure gas to obtain the pressure required for coffee extraction. The gas path system b is equipped with a high-pressure pipeline b1, a gas pressure reducing mechanism b2, and a low-pressure pipeline b3. It can not only reduce pressure but also form a complete gas path, effectively realizing the connection between the gas source and the gas-using components.

[0144] 3. The gas pressure reducing mechanism b2 of the gas circuit system b adopts a floating block component 24. The floating block component 24 has a certain clamping force. The high pressure gas in the high pressure chamber 211 needs to overcome the clamping 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 gas pressure value, which ensures the stability of the extraction pressure required for subsequent coffee making.

[0145] 4. The gas pressure reducing mechanism b2 uses a disc spring 242a as the elastic element 242. The disc spring 242a has the advantages of short stroke, heavy load, small space requirement, 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 element 242 formed by the disc spring combination has a smaller requirement for axial dimension, thereby reducing the overall volume of the gas pressure reducing mechanism b2. This allows it to be effectively combined with the coffee machine and achieve a significant pressure reduction effect.

[0146] 5. The gas pressure reducing mechanism b2 is equipped with a bearing 26, which is a miniature thrust ball bearing 26. Its function is to bear axial load, and it has the advantages of high axial load and high rigidity. At the same time, its axial space occupancy is small. More importantly, the bearing 26 enables the smooth operation of the adjustment knob 25. The turning process is smooth, which greatly improves the user's user experience.

[0147] 6. The puncture system of this utility model realizes the automation of the gas cylinder puncture action, replacing the traditional manual operation of twisting the gas cylinder to puncture, avoiding the defects of manual operation, and has many advantages such as easy operation, convenient gas cylinder replacement, high puncture efficiency, high safety, and less gas leakage.

[0148] 7. The Italian coffee machine of this utility model adds a balance valve mechanism a7 to the traditional structure, which can automatically balance the pressure after extraction. It is not only highly safe, but also facilitates timely second extraction or cleaning of coffee grounds. It has many advantages such as convenient operation, high efficiency and high safety.

[0149] 8. This utility model can use a gas cylinder c or an external air pump i as the air source. Compared with the traditional coffee machine that uses a water pump for pressurization, it has many advantages such as low power consumption, low noise, and stable pressure. More importantly, it can greatly reduce the space occupied, making the machine small in size.

[0150] Example 2

[0151] Figure 26 An espresso machine according to another embodiment of the present invention is shown schematically.

[0152] like Figure 26 As shown, the structure of the espresso machine in this embodiment is basically the same as that of the espresso machine in embodiment 1, except that: (1) the gas cylinder c and the puncture system g are omitted; (2) an external air pump i is used as the gas source.

[0153] Specifically, only the electronic control system h and part of the pneumatic system b are installed inside the first housing d. The threaded external interface of the first connecting block b7 is exposed outside the first housing d. The output interface of the commercially available air pump i is threadedly connected to the threaded external interface of the first connecting block b7. Then, by starting the air pump i, high-pressure gas is injected into the pneumatic system b.

[0154] The usage of this embodiment is suitable for users who do not carry gas cylinder c or prefer to use an air pump as a gas source, which makes this utility model have the advantages of being easy to use and highly applicable on the basis of embodiment 1.

[0155] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. An espresso machine, characterized in that, The device includes a main unit (a), a high-pressure gas source, and a gas path system (b). The main unit (a) includes a water tank (a1) and a coffee extraction chamber (a2) connected by a one-way valve mechanism (a6). The input end of the gas path system (b) is connected to the output end of the high-pressure gas source, and the output end of the gas path system (b) is connected to the water tank (a1). The gas path system (b) is capable of depressurizing the high-pressure gas and delivering the depressurized low-pressure gas to the top of the water tank (a1). The gas 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 output end of the high-pressure gas source, 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 espresso machine according to claim 1, characterized in that, It also includes a puncture system (g), the high-pressure gas source is a gas cylinder (c), the gas cylinder (c) is installed on the puncture system (g), the puncture system (g) cooperates with the gas cylinder (c) and is used to puncture the gas cylinder (c), the input end of the gas path system (b) is connected to the gas output end of the puncture system (g), the puncture system (g) includes a mounting bracket (14), a gas cylinder positioning mechanism (11), a driving mechanism (12) and a puncture mechanism (13), the gas cylinder positioning mechanism (11) includes a fifth mounting groove (110) that cooperates with the gas cylinder (c) for limiting, the driving mechanism (12) is used to drive the gas cylinder (c) to rise, fall and move, and the puncture mechanism (13) cooperates with the gas cylinder (c) and is used to puncture the gas cylinder (c).

3. The espresso machine according to claim 2, 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 rise and fall 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. The lifting drive assembly (121) includes a first drive member (1211), a first transmission module (1212), and a movable frame (1214). The movable frame (1214) is movably mounted on the mounting frame (14). The first drive member (1211) is mounted on the mounting frame (14) and is connected to the first transmission module (1212). The first transmission module (1212) is connected to the movable frame (1214). The movable frame (1214) is connected to the gas cylinder positioning mechanism (11). The horizontal drive assembly (122) includes a second drive member (1221), a second transmission module (1222), and a top cylinder (1223). The second drive member (1221) is connected to 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).

4. The espresso machine according to claim 3, characterized in that, 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 connected to the puncture mechanism (13) and the horizontal drive assembly (122) respectively. The inner bracket (112) is fitted 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 contour groove (1121a) that cooperates with the gas cylinder (c) for positioning. The first contour groove (1121a) and the outer bracket (111) together form the fifth mounting groove (110). The inner bracket (112) includes a top block (1121), a support seat (1122), a fourth spring (1123), and a guide pin (1124). The top block (1121) is movably mounted above the support seat (1122) and guided by the guide pin (1124). A first limiting groove (1121b) is provided 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 support seat (1122) respectively. The puncture mechanism (13) includes a second mounting base (131), a puncture needle (132), and an output tube (133). The second mounting base (131) has a through hole (1311) that matches the mouth of the gas cylinder (c). The puncture needle (132) is installed in the second mounting base (131) and its head extends into the through hole (1311). The first end of the output tube (133) extends into the second mounting base (131), and the second end is connected to the high-pressure pipeline (b1). The center of the puncture needle (132) has a gas passage (1321) that communicates with the output tube (133).

5. The espresso machine according to claim 1, characterized in that, The gas pressure reducing mechanism (b2) includes a first valve seat (21), a valve stem (22), an air inlet (23), a floating plug assembly (24), and an adjusting knob (25). The first valve seat (21) has a high-pressure chamber (211) and a low-pressure chamber (212). The air inlet (23) is installed within the first valve seat (21) and separates the high-pressure chamber (211) and the low-pressure chamber (212). An air inlet channel (231) is provided within the air inlet (23). An air hole (232) is provided at the end of the air intake channel (231). The valve stem (22) is fitted onto the first valve seat (21). The floating block assembly (24) is installed at the first end of the valve stem (22) and cooperates with the air outlet end of the air hole (232). The floating block assembly (24) can always maintain elastic contact with the air inlet (23). The adjusting knob (25) is installed at the second end of the valve stem (22) and can drive the valve stem (22) to rotate.

6. The espresso machine according to claim 5, characterized in that, The gas pressure reducing mechanism (b2) also includes a bearing (26), and the floating block assembly (24) includes a floating rod (241) and an elastic element (242). One end of the floating rod (241) is movably fitted onto the valve stem (22), and the other end cooperates with the air hole (232). The elastic element (242) is fitted onto the outer periphery of the floating rod (241), and both ends abut against the valve stem (22) and the floating rod (241) respectively. Under the action of the elastic element (242), the floating rod (241) always maintains elastic contact with the air inlet (23). The floating rod (241) has a third limiting boss (241a) at the end away from the valve stem (22). The third limiting boss (241a) is movably installed in the low-pressure chamber (212) and cooperates with the air hole (232). The bearing (26) is installed at the end of the valve stem (22) away from the adjusting knob (25) and is fitted on the outer periphery of the floating rod (241). The first end of the elastic element (242) abuts against the third limiting boss (241a) and the second end abuts against the bearing (26).

7. The espresso machine according to any one of claims 1-6, characterized in that, The main unit (a) further includes a fixed base (a3), a powder bowl (a4), a third mounting base (a5), and a third sealing ring (a8). The fixed base (a3) ​​is disposed at the bottom of the water tank (a1). The third mounting base (a5) is disposed at the bottom of the fixed base (a3) ​​and detachably connected to the fixed base (a3). The third sealing ring (a8) is fitted into the fixed base (a3). The powder bowl (a4) is fitted into the third mounting base (a5) and can be sealed by the third sealing ring (a8). The three mounting bases (a5) are pressed against the third sealing ring (a8). The coffee bowl (a4) is used to hold coffee powder. The coffee bowl (a4) and the fixed base (a3) ​​together form the coffee extraction chamber (a2). An air inlet pipe (b31) is installed on the fixed base (a3). The first end of the air inlet pipe (b31) is connected to the output end of the low-pressure pipeline (b3), and the second end passes through the water tank (a1) and extends to the top of the water tank (a1).

8. The espresso machine according to claim 7, characterized in that, The main unit (a) further includes a balance valve mechanism (a7), the one-way valve mechanism (a6) forms a first channel (30) connecting the water tank (a1) and the coffee extraction chamber (a2), the balance valve mechanism (a7) forms a second channel (40) connecting the water tank (a1) and the coffee extraction chamber (a2), and the one-way valve mechanism (a6) and the balance valve mechanism (a7) are arranged in opposite directions.

9. The espresso machine according to claim 8, characterized in that, 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 sequentially along a first direction. The first fastener (31) is installed in 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 fitted around the outer periphery of the first valve needle (32) and seals against the fixed seat (a3). The first connector (35) is installed in the fixed seat (a3). The first spring (34) is fitted around the end of the first valve needle (32) near 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) and a second valve needle (42), a second sealing ring (43), a second spring (44), and a second connector (45) arranged sequentially along a second direction, the second direction being 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 inside the second fastener (41). The second sealing ring (43) is fitted around the outer periphery of the second valve needle (42) and seals against the second fastener (41). The second connector (45) is installed inside the second fastener (41). The second spring (44) is fitted around one end of the second valve needle (42) near 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).

10. The espresso machine according to any one of claims 1-6, characterized in that, It also 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 mounted on the upper end surface of the base (f) and extends upward perpendicularly to the base (f). The second housing (e) is mounted on one side of the first housing (d) and extends horizontally perpendicularly to the first housing (d). The main unit (a) is mounted through the second housing (e) and is parallel to the first housing (d).

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