Full-automatic coffee machine

Abstract

The invention relates to the technical field of electrical equipment for brewing coffee, in particular to a full-automatic coffee machine which comprises a lower brewing head unit, an upper brewing head unit, a powder sweeping unit, a main driving unit and a lower brewing head driving unit which are arranged in a working cavity of the coffee machine. The lower brewing head unit sequentially cooperates with the powder supply unit, the upper brewing head unit, the lower brewing head driving unit and the powder sweeping unit to complete the working steps of coffee powder adding, pressed powder pressing, coffee extraction, pressed powder ejection, pressed powder sweeping and brewing piston resetting in the linear movement process in the working cavity, distributed action is adopted, and the function is reliable; meanwhile, adjustment of pressure relief and water inflow in the extraction head and driving of pressed powder pressing, pressed powder ejection, pressed powder sweeping and brewing piston resetting are completed only through the main driving unit, the configuration number of driving structures in the coffee machine is reduced, and convenience is provided for reducing the design size of the coffee machine.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment for brewing coffee, and in particular to a fully automatic coffee machine. Background Art

[0002] A fully automatic coffee machine is an appliance that can at least realize the entire process of brewing coffee, including pressing powder, brewing, and removing residues. During the use of the coffee machine, coffee powder enters the brewing chamber and is pressed into a powder cake. Hot water passes through the powder cake for extraction. The extracted powder cake is pushed out by the powder pushing structure and scraped off by the powder scraper.

[0003] With the advancement of science and technology, people have added some other requirements to coffee machines besides brewing coffee, such as small size, light weight, easy operation, etc. However, the current fully automatic coffee machines need to be equipped with electric drive structures for brewing chamber movement, powder pressing, exhaust, powder scraping, reset and other functions. The configuration of too many drive structures not only reduces the functional stability of the coffee machine, but also occupies a lot of space in the coffee machine, thereby limiting the size of the coffee machine. Summary of the invention

[0004] The present application provides a fully automatic coffee machine, which has fewer driving structures and is convenient for reducing the size of the coffee machine.

[0005] A fully automatic coffee machine, comprising a lower brewing head unit, an upper brewing head unit, a powder sweeping unit, a main driving unit and a lower brewing head driving unit arranged in a working chamber of the coffee machine;

[0006] The main driving unit is used to drive the lower brewing head unit to move linearly back and forth in the working chamber;

[0007] The upper brewing head unit is located at the top of the moving path of the lower brewing head unit, and includes a ventilation pipe, a water pipe and an extraction head. The extraction head is normally connected to the ventilation pipe, and is connected to the water pipe when it moves upward to the end of its own moving path under the push of the lower brewing head unit;

[0008] The lower brewing head unit comprises a brewer and a brewing piston, wherein the brewer is provided with a brewing chamber facing the upper brewing head unit, and the brewing piston comprises a piston rod penetrating the bottom of the brewing chamber and a piston head sliding along the brewing chamber;

[0009] A powder sweeping unit is arranged on the brewer, and a driving column is arranged at the bottom of the working chamber. When the brewer moves downward, the driving column drives the powder sweeping unit to sweep the powder;

[0010] The lower brewing head driving unit is arranged at the bottom of the working chamber, and is used for abutting the bottom of the brewing piston to push the brewing piston to move upward relative to the brewer when the lower brewing head unit moves toward the lower brewing head driving unit, and pulling the brewing piston to move downward relative to the brewer to reset when the lower brewing head unit moves away from the lower brewing head driving unit.

[0011] By adopting the above technical solution, after the lower brewing head unit receives the powder, it moves upward from the bottom and approaches the upper brewing head unit. In the process of the lower brewing head unit approaching the upper brewing head unit, the coffee powder is pressed into a powder cake through the cooperation of the extraction head and the brewing chamber. At the same time, in the process of pressing the powder cake, since the extraction head is connected to the ventilation pipe, the air in the brewing chamber is discharged through the ventilation pipe. When the extraction head moves to the end of its own moving path, the powder cake is pressed. At this time, the extraction head is connected to the water pipe, and the external hot water enters the brewing chamber through the water pipe to extract coffee. When the coffee extraction is completed, the lower brewing head unit moves downward in a straight line. When the lower brewing head unit contacts the lower brewing head driving unit, as the lower brewing head unit continues to move downward, the lower brewing head driving unit pushes the brewing piston to push the coffee powder cake in the brewing chamber to the top of the brewing chamber, and then drives the powder sweeping unit through the driving column to sweep away the powder cake, completing a single coffee brewing. When the lower brewing head unit moves upward again, the lower brewing head driving unit pulls the brewing piston, and as the brewer moves upward, the brewing piston returns to its initial position, that is, the piston head is located at the bottom of the brewing chamber, so that the brewing chamber can be filled with powder again. During the entire brewing process, the pressure relief and water inlet in the extraction head, the pressing of the powder cake, the ejection of the powder cake, the sweeping of the powder cake, and the reset of the brewing piston are completed only by the force of the movement of the lower brewing head unit, which reduces the number of drive structures configured in the coffee machine and provides convenience for reducing the design volume of the coffee machine.

[0012] In a preferred embodiment, it also includes a powder supply unit, which is fixedly arranged on the side wall of the working chamber, and includes a rotating lower powder channel, and the lower powder channel is inclined relative to the rotation axis. During the rotation of the lower powder channel, it is in the moving path of the lower brewing head unit or gives way to the movement of the lower brewing head unit.

[0013] In a preferred embodiment, the powder supply unit also includes a powder supply transmission device, which includes a gear box and a driving gear and a switch gear arranged in the gear box, and the driving gear and the switch gear are transmitted. The gear box is provided with a discharge port connected to the powder discharge channel and a discharge baffle cooperated with the discharge port, and the discharge baffle is slidably connected to the gear box and is transmitted to the switch gear.

[0014] In a preferred embodiment, the powder supply transmission device also includes a channel gear, which is transmitted to the driving gear, and a material passing through hole connected to the material discharge port is provided in the middle of the channel gear, and the powder discharge channel is fixedly connected to the channel gear and connected to the material passing through hole.

[0015] In a preferred embodiment, the powder lower channel is detachably fixedly connected to the channel gear.

[0016] In a preferred embodiment, the upper brewing head unit also includes a fixed bracket, which is fixedly arranged on the top of the working chamber, an extraction reset spring is connected between the fixed bracket and the extraction head, the ventilation pipe and the water pipe are both fixedly connected to the fixed bracket, and the extraction head is provided with a ventilation structure connected to the ventilation pipe and a water structure connected to the water pipe, the ventilation structure is connected to the ventilation pipe under normal circumstances, and the water structure is connected to the water pipe when the extraction head moves upward to the end of its own moving path.

[0017] In a preferred embodiment, the fixed bracket is fixedly provided with an extraction switch, and the extraction head is provided with a fixed column, and the fixed column triggers the extraction switch when the extraction head moves upward to the end point of its own moving path.

[0018] In a preferred embodiment, the powder sweeping unit includes a rotating rod and a scraper, the rotating rod is connected to the lower brewing head unit by rotating along the moving direction of the lower brewing head unit through a powder sweeping reset torsion spring, the scraper is located at the top of the brewing chamber and fixedly connected to the rotating rod, and the side of the rotating rod is provided with a spiral surface that cooperates with the driving column.

[0019] In a preferred embodiment, a connecting column is connected to the bottom of the piston rod, a locking block and a locking block compression spring are provided at the bottom of the connecting column, and the lower brewing head drive unit includes a base fixedly arranged at the bottom of the working chamber, and the base is provided with a locking ring cooperating with the locking block.

[0020] In a preferred embodiment, the locking block includes a left locking block and a right locking block fixed at both ends of a locking block compression spring 233, and the locking block compression spring is arranged transversely at the bottom of the connecting column.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. During the linear movement of the lower brewing head unit in the working chamber, it cooperates with the powder supply unit, the upper brewing head unit, the lower brewing head drive unit and the powder sweeping unit in sequence to complete the working steps of adding coffee powder, pressing powder cakes, extracting coffee, ejecting powder cakes, sweeping powder cakes and resetting the brewing piston. It adopts distributed actions and has reliable functions. At the same time, only the main drive unit is used to complete the pressure relief and water inlet adjustment in the extraction head, pressing powder cakes, ejecting powder cakes, sweeping powder cakes and resetting the brewing piston, which reduces the number of drive structures in the coffee machine and provides convenience for reducing the design volume of the coffee machine.

[0023] 2. Since the lower powder channel is inclined relative to the axis of rotation, when the lower powder channel rotates, the outlet position at the bottom of the lower powder channel changes, so that it is located on the moving path of the lower brewing head unit or makes way for the lower brewing head unit to move, thereby further reducing the space occupied by the coffee machine and reducing the impact of the increase in the volume of the coffee machine due to the structural design of the coffee powder adding step.

[0024] 3. The design of the feed baffle can close the feed port after the coffee powder is added, preventing the coffee powder from continuing to fall into the powder discharge channel, making the coffee machine easier to clean, preventing water vapor in the coffee machine from passing through the feed port, and reducing the risk of coffee machine being blocked by powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the fully automatic coffee machine described in this application.

[0026] Figure 2 It is a schematic diagram of the structure of the powder supply unit described in this application.

[0027] Figure 3 It is a schematic diagram of the structure of the powder lowering transmission device described in this application.

[0028] Figure 4 It is a schematic diagram of the structure of the powder lowering driving device described in this application.

[0029] Figure 5 It is a schematic diagram of the structure of the lower brewing head unit described in this application.

[0030] Figure 6 It is a schematic diagram of the cross-sectional structure of the lower brewing head unit described in the present application.

[0031] Figure 7 yes Figure 6 Enlarged view of part A in .

[0032] Figure 8 It is a schematic diagram of the structure of the main drive unit described in this application.

[0033] Fig. 9 It is a schematic diagram of the structure of the brewer and brewing support described in this application.

[0034] Fig.10 It is a schematic diagram of the structure of the powder supply unit described in this application.

[0035] Fig.11 It is a schematic diagram of the structure of the upper brewing head unit described in this application.

[0036] Fig.12 yes Fig.11 Enlarged view of part B in .

[0037] Fig.13 It is a schematic diagram of the structure of the water pipe and the ventilation pipe in the upper brewing head unit described in the present application.

[0038] Description of reference numerals: 1. main body; 11. working chamber; 2. lower brewing head unit; 21. brewer; 211. coffee outlet; 212. clamping block; 213. rotating port; 214. brewing chamber; 22. brewing piston; 221. piston sealing ring; 222. liquid outlet channel; 223. assembly chamber; 224. lower filter; 23. connecting column; 231. left locking block; 232. right locking block; 233. locking block compression spring 233; 234. giving way chamber; 3. upper brewing head unit; 31. fixing bracket; 311. mounting plate; 3111. guide tube; 3112. through hole; 312. Extraction switch; 32, extraction head; 321, fixing column; 3211, fixing bolt; 3212, limiting gasket; 322, first ventilation groove; 3221, second ventilation groove; 323, first water groove; 3231, second water groove; 324, upper filter; 33, extraction reset spring; 34, ventilation pipe; 341, ventilation sealing pipe; 3411, air path through hole; 342, ventilation sealing ring; 35, water pipe; 351, water path through hole; 352, water sealing ring; 4, powder sweeping unit; 41, rotating rod; 411, spiral surface; 42, cake scraper; 43, powder sweeping and re-sweeping 43; 5. Main drive unit; 51. Lead screw; 52. Guide groove; 53. Drive nut; 54. Nut bracket; 541. Fixed protrusion; 55. Lock plate; 551. Fixed sleeve; 552. Fixed plate; 56. Brewing bracket; 561. Assembly hole; 562. Snap-in groove; 563. Locking slot; 57. Locking bracket; 571. Left locking buckle; 572. Right locking buckle; 573. Locking spring; 574. Locking card plate; 6. Lower brewing head drive unit; 61. Drive column; 62. Locking ring; 7. Powder supply unit; 71. Lower powder drive device; 711. Bushing; 711 1. Trigger protrusion; 712. Feeding drive motor; 713. Feeding micro switch; 72. Powder feeding transmission device; 721. Box body; 7211. Baffle slide; 7212. Feeding port; 7213. Baffle driving hole; 722. Lower cover; 723. Upper cover; 7231. Feeding port; 724. Driving gear; 725. Switch gear; 7251. Fixing hole; 7252. Driving boss; 726. Channel gear; 7261. Inner retaining ring; 727. Movable shaft; 73. Powder feeding channel; 731. Outer retaining ring; 74. Feeding baffle; 741. Driving hole; 74. Grinding device. DETAILED DESCRIPTION

[0039] The following is combined with the accompanying drawings of the specification Figure 1-Figure 13 This application is described in further detail.

[0040] Reference Figure 1The embodiment of the present application discloses a fully automatic coffee machine, which includes a coffee machine body 1 and a lower brewing head unit 2, an upper brewing head unit 3, a powder sweeping unit 4, a main driving unit 5, a lower brewing head driving unit 6 and a powder supply unit 7 arranged in a working chamber 11 of the body 1. The main driving unit 5 is used to drive the lower brewing head unit 2 to move linearly back and forth in the working chamber 11, and the brewing unit includes a brewer 21 and a brewing piston 22. The brewer 21 is provided with a brewing chamber 214 facing the upper brewing head unit 3, and the brewing piston 22 includes a piston rod penetrating the bottom of the brewing chamber 214 and a piston head sliding along the brewing chamber 214. The lower brewing head driving unit 6 is used to cooperate with the main driving unit 5 to drive the brewing piston 22 to slide in the brewing chamber 214 to eject the coffee powder cake and reset.

[0041] During the movement of the lower brewing head unit 2, the coffee machine working steps of adding coffee powder, pressing coffee powder cakes, extracting coffee and ejecting coffee powder cakes are completed in sequence through the powder supply unit 7, the upper brewing head unit 3, and the lower brewing head drive unit 6, and finally the ejected coffee powder cakes are swept away by the powder sweeping unit 4. It should be noted that the coffee machine is equipped with a powder receiving frame (not shown in the figure) for receiving coffee powder cakes, and the coffee powder cakes fall into the powder receiving frame when they are swept out of the lower brewing head unit 2; in another preferred example, the main body 1 is equipped with a powder outlet window (not shown in the figure), and the coffee powder cakes fall to the outside of the coffee machine through the powder outlet window when they are swept out of the lower brewing head unit 2; in this application, the method of collecting coffee powder cakes is not limited to the only method of setting a powder receiving frame or a powder outlet window.

[0042] Reference Figure 2 and Figure 3 The powder supply unit 7 includes a powder lowering driving device 71, a powder lowering transmission device 72, a powder lowering channel 73 and a bean grinding device 74. The bean grinding device 74 is used to grind coffee beans into coffee powder, and the coffee powder enters the brewing chamber 214 through the powder lowering channel 73. The powder lowering driving device 71 drives the powder lowering channel 73 to rotate through the powder lowering transmission device 72, so that the outlet at the bottom of the powder lowering channel 73 is located at a powder supply position or a powder avoidance position, and the powder supply position is: the outlet is located above the brewing chamber 214 of the lower brewing head unit 2, so that the coffee powder can fall into the brewing chamber 214 of the lower brewing head unit 2 after flowing out of the outlet.

[0043] The powder lowering transmission device 72 includes a gear box and a driving gear 724, a switch gear 725 and a channel gear 726 arranged in the gear box. The gear box includes a box body 721, a lower cover 722 located at the bottom of the box body 721 and an upper cover 723 located above the box body 721. The driving gear 724, the switch gear 725 and the channel gear 726 are all located in the installation space formed by the box body 721 and the lower cover 722, and the driving gear 724, the switch gear 725 and the channel gear 726 are meshed in sequence.

[0044] It should be noted that the present application does not make a unique limitation on the connection relationship between the driving gear 724, the switch gear 725 and the channel gear 726. In a preferred example, the driving gear 724, the switch gear 725 and the channel gear 726 are meshed in sequence.

[0045] The channel gear 726 is annular in shape as a whole, and the meshing teeth of the channel gear 726 are located on the outside of the annular structure, and a material passing hole is formed inside the annular structure of the channel gear 726. The housing 721 is provided with a material discharge port 7212, and the coffee powder ground by the bean grinding device 74 enters the brewing chamber 214 through the material discharge port 7212, the material passing hole and the powder discharge channel 73 in sequence. The top of the powder discharge channel 73 is detachably connected to the channel gear 726. When the driving gear 724 rotates, the channel gear 726 can be driven to rotate, and then the powder discharge channel 73 can be driven to rotate. There is a certain angle between the length direction of the powder discharge channel 73 and the axis of rotation of the channel gear 726, so that the powder discharge channel 73 is tilted relative to the axis of rotation. When the powder discharge channel 73 rotates, the outlet at the bottom of the powder discharge channel 73 rotates along an arc trajectory.

[0046] Among them, the present application does not make a sole limitation on the detachable connection method between the powder lowering channel 73 and the channel gear 726. In a preferred example, an inner retaining ring 7261 is extended from the bottom of the channel gear 726, and an outer retaining ring 731 that snaps into the inner retaining ring 7261 is provided on the top of the powder lowering channel 73. The inner diameter of the outer retaining ring 731 is adapted to the outer diameter of the inner retaining ring 7261, and the powder lowering channel 73 is connected to the powder lowering channel 73 through the inner retaining ring 7261 and the outer retaining ring 731.

[0047] Furthermore, the gear box body 721 is also provided with a material removal baffle 74 and a baffle groove 7211 cooperating with the material removal baffle 74. The material removal baffle 74 is slidably connected to the box body 721 through the baffle groove 7211, and the material removal port 7212 is blocked or opened during the sliding process of the material removal baffle 74.

[0048] In one embodiment, the material removal baffle 74 includes an integrally arranged driving portion and a sliding portion, wherein the sliding portion is rectangular in shape and is slidably connected to the baffle slide slot 7211. The driving portion is provided with a long strip driving hole 741, and the length direction of the driving hole 741 is perpendicular to the sliding direction of the material removal baffle 74. The switch gear 725 is provided with a fixing hole 7251, the housing 721 is provided with a baffle driving through hole, and the transmission device further includes a movable shaft 727, which passes through the driving hole 741 and the baffle driving through hole and is fixedly connected to the fixing hole 7251. The inner diameter of the baffle driving through hole is adapted to the circular trajectory of the movable shaft 727 driven by the switch gear 725.

[0049] In another embodiment, the switch gear 725 is protrudingly provided with a baffle driving boss 7252 that cooperates with the baffle driving through hole, the baffle driving boss 7252 is penetrated by the baffle driving through hole, and the movable shaft 727 passes through the driving hole 741 and is fixedly connected to the baffle driving boss 7252.

[0050] Furthermore, a limit plate is fixedly arranged above the movable shaft 727, and the outer diameter of the limit plate is greater than the width of the driving hole 741. In a preferred example, the movable shaft 727 and the limit plate are combined into a bolt, the movable shaft 727 is the screw of the bolt, and the limit plate is the nut of the bolt.

[0051] When the switch gear 725 rotates, the material discharge blocking piece 74 can be driven to slide relative to the blocking piece sliding groove 7211 through the movable shaft 727, and then the material discharge port 7212 can be blocked or opened through the sliding part of the blocking piece sliding groove 7211.

[0052] The upper cover 723 is located above the baffle driving through hole, the baffle slide groove 7211 and the discharge port 7212. The upper cover 723 is provided with a feed port 7231 connected to the discharge port 7212, and the bean grinding device 74 is provided with a powder outlet (not shown in the figure) connected to the feed port 7231. The coffee beans are ground into coffee powder by the bean grinding device 74, and the coffee powder enters the feed port 7231 through the powder outlet, and then enters the powder discharge channel 73 through the feed port 7231 and the discharge port 7212.

[0053] Reference Figures 2 to 4The powder discharge drive device 71 includes a sleeve 711 connected to a driving gear 724 and a discharge drive motor 712 connected to the sleeve 711. The sleeve 711 is fixedly sleeved on the output shaft of the discharge drive motor 712. The sleeve 711 passes through the box 721 and is fixedly connected to the driving gear 724. Discharge micro switches 713 are arranged on both sides of the sleeve 711. The sleeve 711 is fixedly provided with a trigger protrusion 7111 that cooperates with the discharge micro switch 713. The two discharge micro switches 713 correspond to the open state and the closed state of the discharge port 7212 respectively.

[0054] In the initial state, the trigger protrusion 7111 triggers a material discharge micro switch 713, the material discharge port 7212 is in an open state, the outlet of the powder discharge channel 73 is located above the brewing chamber 214, and the coffee powder enters the powder discharge channel 73 through the material discharge port 7212, and then enters the brewing chamber 214. When the material discharge port 7212 needs to be closed, the material discharge drive motor 712 works, driving the shaft sleeve 711 and the driving gear 724 to rotate synchronously, until the trigger protrusion 7111 of the shaft sleeve 711 triggers another material discharge micro switch 713, the material discharge baffle 74 blocks the material discharge port 7212, and the powder discharge channel 73 avoids the powder supply position, so that the lower brewing head unit 2 continues to perform the next step of coffee brewing.

[0055] Reference Figure 5 and Figure 6 The main driving unit 5 includes a main driving motor (not shown in the figure), a lead screw 51 and a main guide groove 52. The lead screw 51 penetrates the lower brewing head unit 2 and is threadedly driven with the brewer 21. The lower brewing head unit 2 slides along the guide groove 52, and the lead screw 51 is driven to rotate by the main driving motor, and the brewer 21 is driven to move along the axis of the lead screw 51 through the lead screw 51 and the main guide groove 52. The mode in which the main driving motor drives the lead screw 51 and cooperates with the main guide groove 52 to drive the brewer 21 to move linearly is the transmission mode of the lead screw 51, which will not be described in detail here.

[0056] Reference Figure 6 and Figure 7 The piston rod is connected to a connecting column 23, and the axis of the brewing chamber 214 is parallel to the axis of the lead screw 51. When the brewer 21 moves downward, the connecting column 23 abuts against the lower brewing head driving unit 6, so that the brewing piston 22 moves upward relative to the brewing chamber 214, thereby pushing the coffee powder cake to the top of the brewing chamber 214.

[0057] A lower filter 224 is fixed on the top of the piston head, and two piston sealing grooves are arranged on the side of the piston head, which are arranged in an upper and lower manner. A piston sealing ring 221 is installed in the piston sealing groove, and a gap with a certain space is formed between the side of the piston head and the inner wall of the brewing chamber 214 through the piston sealing ring 221. A coffee outlet 211 is arranged on the side of the brewer 21, and a liquid outlet channel 222 connecting the lower filter 224 and the coffee outlet 211 is arranged in the piston head. When brewing coffee, hot water is poured in from above the coffee powder cake, and the coffee liquid flows out to the outside of the brewer 21 through the lower filter 224, the liquid outlet channel 222 and the coffee outlet 211.

[0058] A downwardly open assembly cavity 223 is provided in the piston rod, and the connecting column 23 is fixedly connected to the piston rod through the assembly cavity 223 .

[0059] Reference Figure 8 The main driving unit 5 further comprises a driving nut 53, a nut bracket 54, a locking plate 55 and a brewing bracket 56, and the brewer 21 is fixedly connected to the brewing bracket 56. The nut bracket 54 is provided with a vertical nut mounting hole and a threaded hole, a nut fixing plate is provided at one end of the driving nut 53, and the nut fixing plate is provided with a nut fixing hole. After the driving nut 53 is inserted into the nut mounting hole, it is fixedly connected to the nut bracket 54 by a screw (not shown in the figure) passing through the nut fixing hole and the threaded hole.

[0060] A fixing protrusion 541 is disposed on the side of the nut bracket 54 away from the lead screw 51, and the fixing protrusion 541 is disposed with a bracket mounting hole facing the brewing bracket 56. The locking plate 55 includes a fixing plate 552 and a fixing sleeve 551 sleeved with the fixing protrusion 541, and the fixing plate 552 is disposed with a bracket fixing hole. The brewing bracket 56 is provided with an assembly hole 561 that cooperates with the fixing sleeve 551. The fixing sleeve 551 is inserted into the assembly hole 561 from the inner side of the brewing bracket 56, and then is clamped with the brewing bracket 56 through the fixing plate 552, and is fixedly connected with the nut bracket 54 by screws passing through the bracket fixing hole 7251 and the bracket mounting hole. When the lead screw 51 rotates, the brewing bracket 56 is driven to move by the transmission nut 53 that transmits to it.

[0061] Reference Fig. 9 The brewing bracket 56 is provided with a semicircular fixing groove cooperating with the brewing, the inner wall of the semicircular fixing groove is provided with a snap-in groove 562, the outer wall of the brewer 21 is provided with a clamping block 212 cooperating with the clamping groove 562, and the brewer 21 is provided with a locking bracket 57 detachably connected to the semicircular fixing groove on the other side of the clamping block 212.

[0062] Among them, the locking bracket 57 is clamped to the brewing bracket 56 through the left locking buckle 571 and the right locking buckle 572, and a locking buckle spring 573 is arranged between the left locking buckle 571 and the right locking buckle 572. The left locking buckle 571 and the right locking buckle 572 are clamped on the locking bracket 57 under the elastic action of the locking buckle spring 573 after being compressed, and the left locking buckle 571 and the right locking buckle 572 are both provided with a locking clamping plate 574 for clamping the brewing bracket 56, and the brewing bracket 56 is provided with a locking clamping groove 563 cooperating with the locking clamping plate 574. When fixing the brewer 21, firstly engage the block 212 of the brewer 21 in the engaging groove 562, and then squeeze the left lock buckle 571 and the right lock buckle 572 at the same time, so that the left lock buckle 571 and the right lock buckle 572 move toward each other to overcome the elastic force of the lock buckle spring 573, and then insert the lock buckle bracket 57 into the brewing bracket 56, so that the lock buckle plates 574 of the left lock buckle 571 and the right lock buckle 572 are inserted into the corresponding lock buckle slots 563 on the brewing bracket 56.

[0063] Reference Fig.10 In one example, the powder sweeping unit 4 includes a rotating rod 41 and a cake scraper 42. A rotating port 213 is provided at the top of the brewer 21. The rotating rod 41 passes through the rotating port 213 and is fixedly connected to the cake scraper 42 at the top of the brewer 21. The cake scraper 42 is connected to the rotating port 213 via a powder sweeping reset torsion spring 43. When the rotating rod 41 rotates, the cake scraper 42 is driven to rotate, so that the powder cake pushed out to the top of the brewing chamber 214 is scraped off. When the rotating rod 41 is not driven by an external force, the rotating rod 41 and the cake scraper 42 are reset under the elastic force of the powder sweeping reset torsion spring 43.

[0064] The lower brewing head driving unit 6 is fixedly connected with a driving column 61 protruding toward the brewer 21 and cooperating with the rotating rod 41. The driving column 61 and the rotating rod 41 are parallel to the axis of the brewing chamber 214. The driving column 61 is used to drive the rotating rod 41 to rotate. The rotating rod 41 is provided with a spiral surface 411. When the driving column 61 and the rotating rod 41 move relative to each other, the driving column 61 abuts against the spiral surface 411 from bottom to top to drive the rotating rod 41 to rotate in one direction.

[0065] The bottom of the connecting column 23 is provided with a left locking block 231, a right locking block 232, a locking block compression spring 233, and a clearance cavity 234 for accommodating the locking block compression spring 233. The clearance cavity 234 is located at the bottom of the connecting column 23. The left locking block 231 and the right locking block 232 connect the two ends of the locking block compression spring 233. The locking block compression spring 233 is transversely fixed in the clearance cavity 234 through the locking block end cover. The lower brewing head driving unit 6 includes a base fixedly arranged at the bottom of the working chamber 11, and the base is provided with an annular locking ring 62 matched with the left locking block 231 and the right locking block 232.

[0066] When the brewer 21 moves toward the base, the left locking block 231 and the right locking block 232 first abut against the upper edge of the locking ring 62, thereby pushing the coffee powder to the top of the brewer 21 during the movement of the brewer 21. When the driving column 61 drives the driving rod to rotate to scrape off the powder, the left locking block 231 and the right locking block 232 overcome the elastic force of the locking block compression spring 233 under the guidance of the upper surface of the locking ring 62 and move toward each other. When the powder is scraped off, the left locking block 231 and the right locking block 232 are pressed to the bottom of the locking ring 62 to form a snap connection with the locking ring 62. When the brewer 21 moves upward again away from the base, the left locking block 231 and the right locking block 232 and the locking ring 62 can fix the brewing piston 22, so that the piston head moves to the bottom of the brewing chamber 214; after the piston head moves to the bottom of the brewing chamber 214, the brewer 21 continues to move upward, the left locking block 231 and the right locking block 232 synchronously overcome the elastic force of the locking block compression spring 233 under the guidance of the lower surface of the locking ring 62 and move toward each other, and finally move to above the locking ring 62, thereby releasing the lower brewing head drive unit 6 from fixing the brewing piston 22.

[0067] Reference Fig.11 and Fig.12 , the upper brewing head unit 3 includes a fixed bracket 31, an extraction head 32 and an extraction reset spring 33. The fixed bracket 31 is fixedly arranged on the top of the coffee machine working chamber 11, and the extraction head 32 is in the shape of a cylinder with an open top as a whole. The fixed bracket 31 is inserted into the extraction head 32 and connected to the extraction head 32 through the extraction reset spring 33. When the lower brewing head unit 2 moves to the upper brewing head unit 3, the extraction head 32 cooperates with the brewing chamber 214 through the elastic force of the extraction reset spring 33 to press the coffee powder in the brewing chamber 214 into a coffee powder cake. When the extraction is completed, the brewing chamber 214 is away from the upper brewing head unit 3, and the extraction head 32 is restored to the initial state with the fixed bracket 31 under the elastic force of the extraction reset spring 33.

[0068] The end of the fixed bracket 31 facing the extraction head 32 is provided with a mounting plate 311, and the side of the mounting plate 311 facing the extraction head 32 is provided with two guide tubes 3111, and the guide tubes 3111 are provided with guide holes. The extraction head 32 is fixedly provided with a fixing column 321 that is slidably connected with the guide hole. One end of the extraction reset spring 33 abuts against the extraction head 32, and the other end is inserted into the guide hole and sleeved on the fixing column 321. The end of the guide hole away from the extraction head 32 is provided with a through hole 3112. The top of the fixing column 321 passes through the through hole 3112 and slidably cooperates with the through hole 3112. The spring coil of the extraction reset spring 33 is larger than the through hole 3112. When the extraction head 32 moves toward the fixed bracket 31, the fixing column 321 moves with the extraction head 32, and the extraction reset spring 33 is compressed under the limitation of the through hole 3112, thereby applying an elastic force toward the brewing chamber 214 to the extraction head 32, so that the extraction head 32 cooperates with the brewing chamber 214 to press the powder cake.

[0069] The top of the fixing column 321 is connected with a fixing bolt 3211, and the fixing bolt 3211 is fixedly connected to the fixing column 321 through a limiting gasket 3212, and the diameter of the limiting gasket 3212 is larger than the aperture of the through hole 3112. When the upper brewing head unit 3 is in the initial state, the extraction reset spring 33 is in a compressed state, and the limiting gasket 3212 limits the mounting plate 311, so that the fixing bracket 31 and the extraction head 32 are stably connected.

[0070] The fixed bracket 31 is also provided with a switch fixing plate, which is located above the mounting plate 311. The switch fixing plate is fixedly connected with an extraction switch 312. The extraction switch 312 is located above a fixing column 321 along the sliding direction of the extraction head 32, and the trigger structure of the extraction switch 312 faces the fixing column 321. When the extraction head 32 moves toward the fixed bracket 31, the fixing column 321 touches the extraction switch 312 through the fixing bolt 3211. At this time, the coffee powder cake has been pressed, and the extraction switch 312 outputs an electrical signal to stop the lower brewing head unit 2 from moving and control the coffee machine to start adding hot water to extract coffee. The setting of the extraction switch 312 makes the lower brewing head unit 2 stop at a fixed position relative to the upper brewing head unit 3, ensuring that the pressure applied to the powder cake is the same each time the powder cake is pressed.

[0071] Reference Fig.13 During the process of the extraction head 32 and the brewing chamber 214 cooperating to compress the powder cake, the brewing chamber 214 is sealed by the extraction head 32, which causes the air pressure in the brewing chamber 214 to change. When the brewing chamber 214 moves away from the extraction head 32, the process of the extraction head 32 separating from the brewing chamber 214 will also cause the air pressure in the brewing chamber 214 to change. Therefore, in the present application, the upper brewing head unit 3 also includes a ventilation duct 34 and a ventilation structure. When the fixed bracket 31 and the extraction head 32 move relatively, the ventilation duct 34 and the ventilation structure are connected or disconnected from the air path connection.

[0072] The ventilation structure includes a first ventilation groove 322 matched with the ventilation pipe 34, the first ventilation groove 322 is integrally provided with a second ventilation groove 3221, and the first ventilation groove 322 is coaxial with the second ventilation groove 3221. The aperture of the second ventilation groove 3221 is smaller than that of the first ventilation groove 322, and the end of the ventilation pipe 34 facing the ventilation structure is provided with a ventilation sealing tube 341 matched with the second ventilation groove 3221, and the side wall of the ventilation sealing tube 341 is provided with an air path through hole 3411.

[0073] When the fixed bracket 31 and the extraction head 32 move relative to each other, the ventilation pipe 34 moves relative to the ventilation structure. When the ventilation sealing tube 341 is inserted into the second ventilation groove 3221, the second ventilation groove 3221 blocks the air path through hole 3411. When the ventilation sealing tube 341 is not inserted into the second ventilation groove 3221, the ventilation pipe 34 is connected to the first ventilation groove 322 through the second air path through hole 3411.

[0074] Furthermore, ventilation seal rings 342 are disposed outside the ventilation pipe 34 and the ventilation sealing pipe 341, and the air path through hole 3411 is located between the two ventilation seal rings 342. The provision of the ventilation seal ring 342 can improve the sealing strength of the connection between the ventilation sealing pipe 341 and the second ventilation groove 3221.

[0075] In one embodiment, referring to Fig.13 The ventilation structure is arranged on the extraction head 32 , the ventilation pipe 34 is fixedly connected to the mounting plate 311 , and the second ventilation groove 3221 is connected to the brewing chamber 214 through the extraction head 32 .

[0076] In another embodiment, the ventilation structure is fixedly disposed on the mounting plate 311 , the ventilation pipe 34 is fixedly connected to the mounting plate 311 , and the ventilation pipe 34 is connected to the brewing chamber 214 through the extraction head 32 .

[0077] It should be noted that in the present application, there is no sole limitation on whether the ventilation structure is disposed on the extraction head 32 or the mounting plate 311, but both implementations are within the scope of the present application.

[0078] Reference Fig.13 The upper brewing head unit 3 further comprises a water passage 35 and a water passage structure. When the fixing bracket 31 and the extraction head 32 move relative to each other, the water passage 35 and the water passage structure are connected or disconnected from the water path.

[0079] The water-passing structure includes a first water-passing groove 323, the inner wall of the first water-passing groove 323 away from the water-passing pipe 35 is recessed to form a second water-passing groove 3231, and the first water-passing groove 323 and the second water-passing groove 3231 have the same length direction. The side wall of the water-passing pipe 35 at the end of the water-passing structure is provided with a water channel through hole 351 communicating with the second water-passing groove 3231.

[0080] When the fixed bracket 31 and the extraction head 32 move relative to each other, the water pipe 35 moves relative to the water passing structure. When the water channel through hole 351 moves to the position of the second water channel 3231, the second water channel 3231 is connected to the inside of the water pipe 35 through the water channel through hole 351, so that external hot water can enter the brewing chamber 214 through the inside of the water pipe 35 and the second water channel 3231.

[0081] Furthermore, two water-passing sealing rings 352 are arranged outside the water-passing pipe 35, and the water-passing hole 351 is located between the two water-passing sealing rings 352. The arrangement of the water-passing hole 351, the second water-passing groove 3231 and the water-passing sealing ring 352 enables the two water-passing sealing rings 352 to seal the water-passing hole 351 in the initial state, and when the powder compact is completed, the second water-passing groove 3231 is connected to the water-passing hole 351 to realize the disconnection and connection of the water channel.

[0082] In one embodiment, referring to Fig.13 The water pipe 35 is fixedly connected to the mounting plate 311 , and the water passing structure is arranged on the extraction head 32 . The second water passing groove 3231 is connected to the brewing chamber 214 through the extraction head 32 .

[0083] In another embodiment, the water pipe 35 is fixedly connected to the extraction head 32, and the water passing structure is fixedly arranged on the mounting plate 311. The water pipe 35 is connected to the brewing chamber 214 through the extraction head 32.

[0084] It should be noted that in the present application, there is no sole limitation on whether the water-passing structure is disposed on the extraction head 32 or the mounting plate 311 , but both implementations are within the scope of the present application.

[0085] Furthermore, in the present application, any installation method in the prior art can be used for the water-passing structure, water-passing pipe 35, ventilation structure and ventilation pipe 34 to be fixedly arranged on the extraction head 32 or the mounting plate 311. It is only necessary to be able to connect or disconnect the water and air paths in combination with the structures of the water-passing structure, water-passing pipe 35, ventilation structure and ventilation pipe 34 themselves. No specific structural limitation is made in the present application. On the other hand, the water-passing pipe 35 and ventilation pipe 34 can be integrally arranged or can be independent entities. In the present application, it is preferred that the water-passing pipe 35 and ventilation pipe 34 are integrally arranged, and the water-passing pipe 35 and ventilation pipe 34 are fixedly connected to the mounting plate 311 by screws.

[0086] Furthermore, an upper filter sheet 324 is fixedly provided at the end of the extraction head 32 facing the brewing chamber 214 .

[0087] The implementation principle of the embodiment of the present application is as follows: in the initial state, the lower brewing head unit 2 is located at the bottom of the working chamber 11, and the left locking block 231 and the right locking block 232 abut against the lower edge of the locking ring 62; when the lower brewing head unit 2 moves upward, the brewing piston 22 is pulled by the locking ring 62, so that the piston head of the brewing piston 22 is reset to the bottom of the brewing chamber 214; when the brewing piston 22 is reset, the lower brewing head unit 2 continues to move upward to the powder receiving position, and the material discharge driving motor 712 works to rotate the powder discharge channel 73 so that the bottom outlet of the powder discharge channel 73 is located above the brewing chamber 214, and at the same time, the material discharge port 7212 is opened, so that the coffee powder falls into the brewing chamber 214 through the powder discharge channel 73; when the powder receiving is completed, the material discharge driving motor 712 works to rotate the powder discharge channel 73 so that the powder discharge channel 73 gives way to the lower brewing head unit 2 and closes. Close the discharge port 7212; the lower brewing head unit 2 continues to move upward and cooperates with the upper brewing head unit 3 to complete the pressing of the coffee powder cake. During the pressing process of the coffee powder cake, the ventilation duct 34 is connected to the ventilation structure, so that the air in the brewing chamber 214 can be discharged through the ventilation duct 34; after the powder cake is pressed, the extraction switch 312 is triggered, at this time, the ventilation duct 34 and the air path of the ventilation structure are disconnected, and the water path of the water structure is connected to the water path of the water structure, and external hot water enters the brewing chamber 214 through the water path 35 to extract coffee; when the coffee extraction is completed, the lower brewing head unit 2 moves downward, and pushes the powder cake to the top of the brewing chamber 214 through the base and the brewing piston 22 in turn, and drives the cake scraper 42 to scrape off the powder cake through the driving column 61 and the rotating rod 41, and finally the left locking block 231 and the right locking block 232 are clamped to the lower edge of the locking ring 62.

[0088] During the entire brewing process, the pressure relief and water inlet adjustment in the extraction head 32, the pressing of the powder cake, the ejection of the powder cake, the sweeping of the powder cake and the resetting of the brewing piston 22 are completed only through the force of the movement of the lower brewing head unit 2, and the powder supply unit 7 only needs to rotate the lower powder channel 73 to achieve the movement of the lower brewing head unit 2 and the closing of the coffee powder discharge port 7212, thereby reducing the number of drive structures configured in the coffee machine and the space occupied, providing convenience for reducing the design volume of the coffee machine.

[0089] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fully automatic coffee machine, characterized in that: It comprises a lower brewing head unit (2), an upper brewing head unit (3), a powder sweeping unit (4), a main driving unit (5) and a lower brewing head driving unit (6) which are arranged in a working chamber (11) of a coffee machine; The main driving unit (5) is used to drive the lower brewing head unit (2) to move linearly back and forth in the working chamber (11); The upper brewing head unit (3) is located at the top of the moving path of the lower brewing head unit (2), and comprises a ventilation pipe (34), a water pipe (35) and an extraction head (32); the extraction head (32) is normally connected to the ventilation pipe (34), and is connected to the water pipe (35) when it moves upward to the end of its own moving path under the push of the lower brewing head unit (2); A lower brewing head unit (2) comprises a brewer (21) and a brewing piston (22), wherein the brewer (21) is provided with a brewing chamber (214) facing the upper brewing head unit (3), and the brewing piston (22) comprises a piston rod penetrating the bottom of the brewing chamber (214) and a piston head sliding along the brewing chamber (214); A powder sweeping unit (4) is arranged on the brewer (21), and a driving column (61) is arranged at the bottom of the working chamber (11). When the brewer (21) moves downward, the driving column (61) drives the powder sweeping unit (4) to sweep the powder; The lower brewing head drive unit (6) is arranged at the bottom of the working chamber (11) and is used for abutting against the bottom of the brewing piston (22) to push the brewing piston (22) to move upward relative to the brewer (21) when the lower brewing head unit (2) moves toward the lower brewing head drive unit (6), and for pulling the brewing piston (22) to move downward relative to the brewer (21) to reset when the lower brewing head unit (2) moves away from the lower brewing head drive unit (6).

2. A fully automatic coffee machine according to claim 1, characterized in that: The invention also comprises a powder supply unit (7), wherein the powder supply unit (7) is fixedly arranged on the side wall of the working chamber (11), and comprises a rotating lower powder channel (73), wherein the lower powder channel (73) is arranged obliquely relative to the rotating axis, and during the rotation process, the lower powder channel (73) is located on the moving path of the lower brewing head unit (2) or makes way for the movement of the lower brewing head unit (2).

3. A fully automatic coffee machine according to claim 2, characterized in that: The powder supply unit (7) further comprises a powder supply transmission device, the powder supply transmission device comprising a gear box and a driving gear (724) and a switch gear (725) arranged in the gear box, the driving gear (724) and the switch gear (725) are driven, a material discharge port (7212) connected to the powder discharge channel (73) and a material discharge baffle (74) cooperating with the material discharge port (7212) are arranged in the gear box, and the material discharge baffle (74) is slidably connected to the gear box and drives the switch gear (725).

4. A fully automatic coffee machine according to claim 3, characterized in that: The powder supply transmission device also includes a channel gear (726), the channel gear (726) is transmitted with the driving gear (724), a material passing through hole connected to the material discharge port (7212) is arranged in the middle of the channel gear (726), and the powder discharge channel (73) is fixedly connected to the channel gear (726) and is connected to the material passing through hole.

5. A fully automatic coffee machine according to claim 4, characterized in that: The powder lowering channel (73) is detachably fixedly connected to the channel gear (726).

6. The fully automatic coffee machine according to claim 1, characterized in that: The upper brewing head unit (3) further comprises a fixed bracket (31), the fixed bracket (31) being fixedly arranged at the top of the working chamber (11), an extraction reset spring (33) being connected between the fixed bracket (31) and the extraction head (32), the ventilation pipe (34) and the water pipe (35) being fixedly connected to the fixed bracket (31), the extraction head (32) being provided with a ventilation structure connected to the ventilation pipe (34) and a water pipe (35) connected to the water pipe (35), the ventilation structure being connected to the ventilation pipe (34) under normal conditions, and the water pipe (35) being connected to the water pipe (35) when the extraction head (32) moves upward to the end of its own moving path.

7. A fully automatic coffee machine according to claim 6, characterized in that: The fixed bracket (31) is fixedly provided with an extraction switch (312), and the extraction head (32) is provided with a fixed column (321), and when the extraction head (32) moves upward to the end point of its own moving path, the fixed column (321) triggers the extraction switch (312).

8. The fully automatic coffee machine according to claim 1, characterized in that: The powder sweeping unit (4) comprises a rotating rod (41) and a scraper (42); the rotating rod (41) is connected to the lower brewing head unit (2) by rotating along the moving direction of the lower brewing head unit (2) through a powder sweeping reset torsion spring (43); the scraper (42) is located at the top of the brewing chamber (214) and fixedly connected to the rotating rod (41); and a spiral surface (411) cooperating with the driving column (61) is provided on the side of the rotating rod (41).

9. A fully automatic coffee machine according to claim 8, characterized in that: The bottom of the piston rod is connected to a connecting column (23), the bottom of the connecting column (23) is provided with a locking block and a locking block compression spring (233), and the lower brewing head drive unit (6) comprises a base fixedly arranged at the bottom of the working chamber (11), and the base is provided with a locking ring (62) cooperating with the locking block.

10. The fully automatic coffee machine according to claim 9, characterized in that: The locking block comprises a left locking block (231) and a right locking block (232) fixed at two ends of a locking block compression spring (233), and the locking block compression spring (233) is arranged transversely at the bottom of the connecting column (23).

Images