Full-automatic coffee machine extraction device

Abstract

An extraction device of a full-automatic coffee machine structurally and mainly comprises a gear box 100, a magnetic control switch 200, a push rod assembly 300, a waste water box 400, an extraction head 500, high-pressure hot water 600 and a bean grinder 700. The soybean milk machine is characterized in that a powder filling position 111 of the gear box 100 is connected with a bean grinder 700, and powder is filled into a powder cup 116; the gear box 100 drives the powder cup 116 to rotate for cyclic operation of pressing powder, extracting, discharging slag and filling powder; an extraction position 113 of the gear box 100 is connected with an extraction head 500, a water pipe 501 of the extraction head 500 is connected with high-pressure hot water 600, hot water of 9-15 bar is input, and coffee liquid 800 is extracted; under pushing and pressing of the push rod assembly 300, on one hand, powder pressing is conducted at the powder pressing position 112 of the gearbox 100, and on the other hand, powder residues 702 are discharged into the waste water box 400 from the residue discharging position 114 of the gearbox 100.

Description

Technical Field

[0001] The present invention relates to the technical field of coffee machine manufacturing, and in particular to an extraction device of a fully automatic coffee machine. Background Art

[0002] With the continuous improvement of people's living standards, there are more and more types of fully automatic coffee machines on the market. However, the fully automatic coffee machines on the market all use a piston extraction structure when extracting coffee liquid. This piston structure has a pain point: "When the product has been used for a period of time and then used again after a few days, the silicone sealing ring on the piston often sticks and cannot continue to work normally. It needs to be disassembled for cleaning or repair before it can return to normal", resulting in a poor user experience.

[0003] Chinese patent documents CN103142143A and CN103284605A disclose an automatic drip coffee maker, which has a good extraction effect on coffee solids by imitating the water injection method of hand-brewed coffee, because the coffee solids do not come into contact with the coffee maker utensils and do not need to be cleaned.

[0004] Chinese patent document CN105433806A discloses an intelligent fully automatic coffee extraction machine, which realizes fully automatic production of freshly ground coffee by arranging an electric heating tube in an electric water tank to generate steam for fully automatic steam cleaning.

[0005] Chinese patent document CN107049024A discloses a coffee machine device. In this solution, the coffee powder cup, the component that mainly withstands high water pressure, adopts external threads, which meets the function while enhancing the strength. After the mechanism is sealed, an overall frame is used to withstand the thrust generated by the huge water pressure on the components during operation, ensuring the safety of the product under high water pressure working conditions.

[0006] Chinese patent document CN112754285A discloses a fully automatic coffee machine with new water injection and grinding functions, including a water storage device, a water injection device, a bean hopper device, a grinding device, a filter cup conveyor device, and a control device. Its adjusting nut can be unscrewed downward from the center axis, making it easy to disassemble the center rod and conical cutter disc for cleaning.

[0007] Chinese patent document CN115530615A discloses a fully automatic coffee brewing machine, including an electric kettle, a coffee cup, a coffee filter, a water outlet device, a bean grinding device, an electronic control device and a coffee cup rotating device. Since the coffee making process does not require the transfer of utensils, manual participation is reduced, and the machine will not be difficult to clean due to long-term non-use.

[0008] Chinese patent documents CN117017065A, CN117017066A, CN117137325A, and CN117137326A disclose an extraction mechanism and a fully automatic coffee machine, comprising a powder hopper assembly and a baffle assembly. The powder hopper assembly includes a powder hopper cup and a push rod that moves within the hopper cup to eject the brewed powder cake. This structure allows the extraction mechanism to quickly remove the powder cake after brewing, as the powder hopper assembly returns to its original position for holding the powder.

[0009] Chinese patent document CN118104968A discloses a fully automatic coffee machine extraction mechanism, including a brewing component, a driving component and a powder pushing component, which can quickly clean the powder cake after brewing.

[0010] Chinese patent document CN119138758A discloses a fully automatic coffee machine, including a powder and residue collection chamber, an extraction chamber, a drive mechanism, a stirring mechanism, a lifting mechanism, and a cleaning component. It can provide a method for efficiently extracting coffee without residual powder, while achieving automatic cleaning inside the device.

[0011] However, among the fully automatic coffee machines in the existing technology, there are few improvements made to the "semi-automatic Italian pressure coffee machine" that is already very mature in the market. On the basis of making no changes to the coffee liquid extraction method that is completely similar to that of the "semi-automatic Italian pressure coffee machine", a technical solution is provided to transform it into a fully automatic coffee machine extraction device to realize the function of automatic and fully automatic extraction of coffee liquid, freeing hands, thereby improving the user experience of such products. Summary of the Invention

[0012] In view of the technical problems existing in the prior art, the present invention aims to provide a technical solution for the "semi-automatic Italian pressure coffee machine" that is already very mature on the market, so that it can be transformed into a fully automatic coffee machine extraction device, realizing the function of automatic and fully automatic extraction of coffee liquid, freeing hands, and avoiding the problem of silicone sealing rings on traditional extraction pistons sticking, thereby improving the user experience of such products.

[0013] Specifically, according to one aspect of the present invention, the present invention provides a fully automatic coffee machine extraction device, characterized in that the structure of the extraction device mainly includes: a gear box 100, a magnetic switch 200, a push rod assembly 300, a waste water box 400, an extraction head 500, high-pressure hot water 600, and a bean grinder 700; the powder loading position 111 of the gear box 100 is connected to the bean grinder 700 to "load powder" into the powder cup 116; the gear box 100 drives the powder cup 116 to rotate to perform a "powder pressing → extraction → slag discharge → powder filling → powder pressing" cycle; the extraction position 113 of the gear box 100 is connected to the extraction head 500, and the water pipe 501 of the extraction head 500 is connected to the high-pressure hot water 600, and hot water at 9 to 15 bar is input to extract coffee liquid 800; under the push of the push rod assembly 300, on the one hand, at the powder pressing position 112 of the gear box 100 “Powder pressing”, on the other hand, discharges the powder residue 702 from the residue discharge position 114 of the gear box 100 into the waste water box 400.

[0014] According to the fully automatic coffee machine extraction device described above, the invention is characterized in that the gearbox 100 of the extraction device mainly includes: a motor 101, a driving gear 102, a driven gear 103, a screw 104, a housing 105, a housing cover 106, a filter 107, a coffee spout 108, a guide sleeve 109, a magnet 110, a powder loading position 111, a powder pressing position 112, an extraction position 113, a slag discharge position 114, a center hole 115, a powder cup 116, and a main shaft 117. The powder cup 116 and the driven gear 103 are an integral structure, that is, four powder cups 116 are directly machined on the driven gear 103 at 90° intervals. The filter 107 is locked to the box body 105 by screws 104. The filter 107 is kept level with the inner plane of the box body 105, and the upper and lower positions overlap without steps. The coffee nozzle 108 is assembled on the box body 105 with a threaded structure and can be removed for cleaning. The guide sleeve 109 is installed on the box body 105. Four magnets 110 are installed at intervals of 90 degrees on the driven gear 103. In addition, four circular holes are set on the box cover 106 at intervals of 90 degrees, namely, the powder loading position 111, the powder pressing position 112, the extraction position 113, and the slag discharge position 114. The motor 101 is fixed to the box cover 106, and the driving gear 102 is fixed to the box cover 106. Fixed on the rotating shaft of the motor 101; the center hole 115 of the driven gear 103 is aligned with the main shaft 117 of the box body 105 for installation; the driving gear 102 and the driven gear 103 are meshed and installed according to the "dot aligning dot" mark; finally, use screws to fix the box body 105 and the box cover 106 to form an assembly "gear box 100"; the magnetic control switch 200 is fixed on the box cover 106, located directly above the magnet 110.

[0015] According to the above-mentioned fully automatic coffee machine extraction device of the present invention, it is characterized in that the motor 101 of the "gear box 100" drives the driving gear 102, which drives the driven gear 103; the "electronic program of the control circuit" adopts the "dividing head" principle to divide the driven gear 103 into four equal parts, and pauses every 90° rotation. During the pause, the magnet 110 on the driven gear 103 rotates to the bottom of the magnetic control switch 200. The magnetic control switch 200 senses the magnetic force of the magnet 110 and feeds back the signal to the "electronic program of the control circuit" for secondary correction, thereby accurately controlling the "start / stop" of the motor 101, so that the four powder cups 116 on the driven gear 103 always stop at the powder loading position 111, the powder pressing position 112, the extraction position 113, and the slag discharge position 114.

[0016] The principle of the "indexing head" here refers to a conventional dividing head. An indexing head is a machine tool accessory used to divide a workpiece's circumference into equal sections or perform angular measurement and indexing. Common mechanical dividing head principles include worm and gear transmission and indexing plate transmission. In the worm and gear transmission principle, the indexing head contains a worm and gear transmission mechanism. The worm is connected to the handle, and the worm gear is coaxial with the spindle that holds the workpiece. When the handle is turned, the worm rotates the worm gear. Because the worm and gear transmission ratio is fixed, typically 1:40, meaning that for every 40 revolutions of the worm, the worm gear rotates the spindle once, precise control of the spindle's rotation angle is achieved. In the indexing plate principle, the indexing plate has several circles of holes with different equal divisions. An indexing fork and a locating pin allow the indexing plate to be fixed in different positions, achieving different divisions. For example, to divide a workpiece into five equal parts, a hole ring with five equally divided holes can be selected. Each time the handle is turned, the positioning pin moves from one hole to the adjacent hole, and the spindle rotates 1 / 5 of a turn, or 72°, to complete the division. Furthermore, there are optical dividing heads, which utilize optical systems to precisely measure and index angles. Using devices such as optical scales and eyepieces, angle values can be read more accurately, and are commonly used in high-precision machining and measurement applications. Since this is not the core of the present invention, it will not be discussed in detail here.

[0017] According to the fully automatic coffee machine extraction device involved in the present invention, it is characterized in that the four powder cups 116 on the driven gear 103 of the "gear box 100" are a bottomless structure, which fully utilizes the "plane-matching-plane-sealed" structural mode between the driven gear 103 and the box body 105, so that the bottomless powder cups 116 of the driven gear 103 can rotate on the inner plane of the box body 105 to transport coffee powder without leaking powder.

[0018] According to the above-mentioned fully automatic coffee machine extraction device involved in the present invention, it is characterized in that the "powder pressing hammer 303" of the extraction device mainly includes: a bracket 301, a spring 302, a powder pressing hammer 303, a latch 304, a slag discharge rod 305, and an electric push rod 306; the "powder pressing" and "slag discharge" positions share one electric push rod 306, but the pushing strokes required for "powder pressing" and "slag discharge" are different, and the "slag discharge" stroke is greater than the "powder pressing" stroke. Therefore, the powder pressing hammer 303 adopts an elastic structure, and the elastic characteristics of the spring 302 are used to accommodate the structural difference in stroke.

[0019] According to the above-mentioned fully automatic coffee machine extraction device involved in the present invention, it is characterized in that the "wastewater box 400" of the extraction device mainly includes: a powder residue box 401, a powder residue bin 401A, a wastewater bin 401B, a coaster 402, and a drainage hole 403; wherein, the bottom of the powder residue bin 401A is an inclined structure, inclined toward the wastewater bin 401B; under the push of the residue discharge rod 305, the powder residue 702 is discharged from the residue discharge position 114 through the guide sleeve 109 into the powder residue bin 401A; and the clean water enters the powder residue bin 401A, flows through the inclined surface and the drainage hole 403, and finally flows into the wastewater bin 401B, thereby realizing the separation of the powder residue 702 and the wastewater.

[0020] According to the above, the present invention relates to a fully automatic coffee machine extraction device, characterized in that the "extraction head 500" of the extraction device mainly includes: a water pipe 501, a bracket 502, a sealing gasket 503, a screw 504, a shower head 505, and a retaining spring 506; the water pipe 501 is connected to a high-pressure hot water source 600, inputting hot water at 9 to 15 bar; the shower head 505 sprays water evenly to brew coffee powder 701 and extract coffee liquid 800 under high pressure; the sealing gasket 503 seals the extraction head 500 and the cup mouth of the powder cup 116.

[0021] According to the above, the present invention relates to a fully automatic coffee machine extraction device, characterized in that the bean grinder 700 is started to grind the roasted coffee beans into coffee powder 701, and the coffee powder is filled into the powder cup 116 stopped at the powder filling position 111 and then stopped; the motor 101 of the gear box 100 drives the driving gear 102 to rotate clockwise, driving the driven gear 103 to rotate counterclockwise by 90° and pause to reach the "powder pressing position 112", the electric push rod 306 is started, and drives the powder pressing hammer 303 of the push rod assembly 300 to compact the coffee powder 701 in the powder cup 116 and then reset; the driven gear 103 rotates counterclockwise by 90° again and pauses to reach the "extraction position 113", and the extraction head 500 inputs 9 to 15 The high-pressure hot water 600 at 1 bar is evenly sprayed out through the shower head 505 to brew the coffee powder 701, and the coffee liquid 800 is extracted under high pressure and flows into the coffee cup 801; the driven gear 103 rotates counterclockwise again by 90 degrees and pauses to the "dregs discharge position 114", and the electric push rod 306 is started again, driving the discharge rod 305 of the push rod assembly 300 to push the powder residue 702 downward, and discharge it into the waste water box 400 through the guide sleeve 109, and then the electric push rod 306 is reset, successfully completing one round of coffee liquid extraction; this cycle can be used to extract a single cup or continuously extract refills.

[0022] According to another aspect of the present invention, a fully automatic coffee machine is provided, comprising the fully automatic coffee machine extraction device as described above.

[0023] The present invention has at least the following technical effects: In the present invention, due to the use of an extraction structure in which a motor 101 drives a driving gear 102, which in turn drives a driven gear 103 (that is, drives a powder cup 116) to rotate, the extracted coffee liquid 800 can flow directly into the coffee cup 801, eliminating the need for pipes to guide the coffee liquid 800 to the coffee cup 801 as in fully automatic coffee machines on the market, thereby ensuring the temperature and flavor of the coffee liquid 800.

[0024] In the present invention, since the extraction head 500 of the "semi-automatic Italian pressure coffee machine" commonly used on the market is adopted, the traditional piston-type extraction structure is not used. The extraction method is completely similar to that of the "semi-automatic Italian pressure coffee machine" and no changes are made. Therefore, the problem of the silicone sealing ring on the traditional extraction piston sticking can be avoided.

[0025] In the present invention, since the extraction head 500 of the "semi-automatic Italian pressure coffee machine" commonly used on the market is adopted, the traditional piston-type extraction structure is not used. The extraction method is completely similar to that of the "semi-automatic Italian pressure coffee machine" and no changes are made. Therefore, the defect of the traditional extraction piston tearing the powder cup 116 can be avoided.

[0026] In the present invention, since a motor 101 drives the driving gear 102 to drive the driven gear 103 (that is, drives the powder cup 116) to rotate, an extraction structure is adopted instead of a traditional piston-type extraction structure. The four positions of the extraction device, namely "powder loading, powder pressing, extraction, and residue discharge", are relatively independent. Therefore, the product appearance design can be consistent with the appearance of the very mature "semi-automatic espresso machine" on the market, making it easier for consumers to accept.

[0027] In the present invention, since a motor 101 is used to drive the driving gear 102, which drives the driven gear 103 (that is, drives the powder cup 116) to rotate, an extraction structure is not used. The traditional piston-type extraction structure is not used. The four positions of the extraction device, namely "powder loading - powder pressing - extraction - and slag discharge", are relatively independent. Therefore, a flushing and cleaning function can be added to the "slag discharge position" according to product needs, making the slag discharge more thorough. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A perspective schematic diagram illustrating a fully automatic coffee machine extraction device according to an embodiment of the present invention; Figure 2 This is an exploded view of a gear box 100 of a fully automatic coffee machine extraction device according to an embodiment of the present invention, showing the main internal structural components of the gear box 100; Figure 3 A partial schematic diagram showing a gear box 100 of a fully automatic coffee machine extraction device according to an embodiment of the present invention, wherein a driving gear 102 and a driven gear 103 are aligned and meshed with each other; Figure 4 Schematic diagram of an explosion showing a push rod assembly 300 of a fully automatic coffee machine extraction device according to an embodiment of the present invention; Figure 5 A perspective schematic diagram illustrating an extraction head 500 of a fully automatic coffee machine extraction device according to an embodiment of the present invention; Figure 6 This is a partial exploded view of a fully automatic coffee machine extraction device according to an embodiment of the present invention, showing the detailed structure of the waste water box 400; Figure 7 A cross-sectional view from one perspective of a fully automatic coffee machine extraction device according to an embodiment of the present invention is shown, illustrating the structure of the device when it is being loaded with coffee powder; Figure 8 A cross-sectional view from a second perspective of a fully automatic coffee machine extraction device according to an embodiment of the present invention is shown, illustrating the structure of the device during coffee powder pressing. Figure 9A cross-sectional view from a third perspective of a fully automatic coffee machine extraction device according to an embodiment of the present invention is shown, illustrating the structure of the device during extraction. Figure 10 A cross-sectional view from a fourth perspective of a fully automatic coffee machine extraction device according to an embodiment of the present invention is shown, illustrating the structure of the device during slag discharge; The components indicated by the reference numerals in the figures are: 100 - Gearbox, mainly including: 101 - Motor, 102 - Driving gear, 103 - Driven gear, 104 - Screws, 105 - Box body, 106 - Box cover, 107 - Filter, 108 - Coffee nozzle, 109 - Guide sleeve, 110 - Magnet, 111 - Powder loading position, 112 - Powder pressing position, 113 - Extraction position, 114 - Slag discharge position, 115 - Center hole, 116 - Powder cup, 117 - Spindle; 200-magnetic switch; 300-push rod assembly, mainly including: 301- bracket, 302- spring, 303- powder hammer, 304- latch, 305- slag discharge rod, 306- electric push rod; 400-wastewater box, mainly including: 401-powder residue box, 401A-powder residue bin, 401B-wastewater bin, 402-coast pad, 403-drain hole; 500-extraction head, mainly including: 501-water pipe, 502-bracket, 503-sealing gasket, 504-screw, 505-shower head, 506-circlip; 600-high-pressure hot water, i.e., hot water input at 9 to 15 bar; 700-bean grinder, 701-coffee powder, 702-ground coffee; 800-coffee liquid, 801 coffee cup. DETAILED DESCRIPTION

[0029] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention is described in detail below in conjunction with specific embodiments with reference to the accompanying drawings. Those skilled in the art will appreciate that the accompanying drawings illustrate various embodiments by way of example and not limitation, and that the embodiments are illustrative only, and the present invention is not limited to the specific embodiments.

[0030] Figure 1The schematic diagram shows an exemplary embodiment of a fully automatic coffee machine extraction device according to the present invention; the fully automatic coffee machine extraction device is designed as a simple structure with novel functions and effective performance, and is applied to fully automatic coffee machines; its structure mainly includes: a gear box 100, a magnetic switch 200, a push rod assembly 300, a waste water box 400, an extraction head 500, high-pressure hot water 600, and a bean grinder 700; it is characterized in that the powder loading position 111 of the gear box 100 is connected to the bean grinder 700 to "load powder" into the powder cup 116; the gear box 100 drives the powder cup 116 to perform a "powder pressing → extraction → slag discharge → powder loading → powder pressing" cycle; that is, the extraction position 113 of the gear box 100 is connected to the extraction head 500, and the water pipe 501 of the extraction head 500 is connected to the high-pressure hot water 600, with an input of 9 to 15 bar. hot water is used to extract coffee liquid 800; under the push of the push rod assembly 300, on the one hand, the powder is "pressed" at the powder pressing position 112 of the gear box 100, and on the other hand, the powder residue 702 is discharged from the residue discharge position 114 of the gear box 100 into the waste water box 400. Figure 2 and Figure 3 The embodiment of the gear box 100 of the fully automatic coffee machine extraction device according to the present invention is schematically shown; Figure 2 1 is an exploded schematic diagram of a gear box 100 of a fully automatic coffee machine extraction device according to an embodiment of the present invention, showing the main internal structural components of the gear box 100; Figure 3This is a partial schematic diagram of the gearbox 100 of a fully automatic coffee machine extraction device according to an embodiment of the present invention, showing the driving gear 102 and the driven gear 103 being meshed and installed with their points aligned. The structure mainly includes: a motor 101, a driving gear 102, a driven gear 103, a screw 104, a housing 105, a housing cover 106, a filter 107, a coffee spout 108, a guide sleeve 109, a magnet 110, a powder loading position 111, a powder pressing position 112, an extraction position 113, a slag discharge position 114, a center hole 115, a powder cup 116, and a main shaft 117. The powder cup 116 and the driven gear 103 are an integral structure, that is, four powder cups 116 are directly machined on the driven gear 103 at 90° intervals. The filter 107 The filter 107 is locked to the box body 105 by screws 104, and the upper and lower positions coincide with each other without steps; the coffee mouth 108 is assembled on the box body 105 with a threaded structure and can be removed for cleaning; the guide sleeve 109 is installed on the box body 105; four magnets 110 are installed on the driven gear 103 at intervals of 90°; in addition, four circular holes are provided on the box cover 106 at intervals of 90°, namely, a powder loading position 111, a powder pressing position 112, an extraction position 113, and a slag discharge position 114; the motor 101 is fixed on the box cover 106, and the driving gear 102 is fixed on the rotating shaft of the motor 101; the center hole 115 of the driven gear 103 is aligned with the main shaft 117 of the box body 105 for installation; the driving gear 102 and the driven gear 103 are aligned with each other. The gears 102 and 103 are engaged and installed according to the "dot-to-dot" markings. Finally, the box body 105 and the box cover 106 are fixed with screws to form an assembly "gear box 100". The motor 101 of the "gear box 100" drives the driving gear 102, which in turn drives the driven gear 103. The "electronic program of the control circuit" uses the "dividing head" principle to divide the driven gear 103 into four equal parts, and pauses every 90° rotation. During the pause, the magnet 110 on the driven gear 103 rotates to the bottom of the magnetic control switch 200. The magnetic control switch 200 senses the magnetic force of the magnet 110 and feeds back the signal to the "electronic program of the control circuit" for secondary correction, thereby accurately controlling the "start / stop" of the motor 101, so that the four powder cups 116 on the driven gear 103 always stop at the powder loading position 111, the powder pressing position 112, the extraction position 113, and the slag discharge position 114. The four powder cups 116 on the driven gear 103 of the "gear box 100" are of a bottomless structure, which fully utilizes the "plane-matched, plane-sealed" structural mode between the driven gear 103 and the box body 105, so that the bottomless powder cups 116 of the driven gear 103 can rotate on the inner plane of the box body 105 to transport coffee powder without leaking powder.

[0031] Figure 4 、 Figure 5 and Figure 6The following schematically illustrates an exemplary embodiment of a fully automatic coffee machine extraction device according to the present invention; FIG4 is an exploded schematic diagram of a "push rod assembly 300" of a fully automatic coffee machine extraction device according to an embodiment of the present invention; Figure 5 This is a three-dimensional schematic diagram of an "extraction head 500" of a fully automatic coffee machine extraction device according to an embodiment of the present invention; Figure 6 This is a partial exploded schematic diagram of a fully automatic coffee machine extraction device according to an embodiment of the present invention, showing the detailed structure of the "waste water box 400"; the structure of the "push rod assembly 300" mainly includes: a bracket 301, a spring 302, a powder tamping hammer 303, a latch 304, a slag discharge rod 305, and an electric push rod 306; the "powder tamping" and "slag discharge" positions share a single electric push rod 306, which can only provide one pushing stroke, but the pushing strokes required for "powder tamping" and "slag discharge" are different, and the "slag discharge" stroke is longer than the "powder tamping" stroke. Therefore, the powder tamping hammer 303 adopts an elastic structure, which uses the elastic characteristics of the spring 302 to accommodate the structural difference in stroke; the structure of the "extraction head 500" mainly includes: a water pipe 501, a bracket 502, a sealing gasket 503, a screw 504, a shower head 505, and a retaining spring 506; the water pipe 501 is connected to the high-pressure hot water 600, which inputs hot water at 9 to 15 bar; the shower head 505 sprays water evenly to brew the coffee powder 701, High pressure is used to extract coffee liquid 800; the sealing gasket 503 seals the extraction head 500 and the cup mouth of the coffee cup 116; in addition, the structure of the waste water box 400 mainly includes: a powder residue box 401, a powder residue bin 401A, a waste water bin 401B, a coaster 402, and a drainage hole 403; the bottom of the powder residue bin 401A is a sloped structure that tilts toward the waste water bin 401B; under the push of the residue discharge rod 305, the powder residue 702 is discharged from the residue discharge position 114 through the guide sleeve 109 into the powder residue bin 401A; and the clean water enters the powder residue bin 401A, flows through the slope and the drainage hole 403, and finally flows into the waste water bin 401B, thereby separating the powder residue 702 from the waste water.

[0032] Figure 7 、 Figure 8 、 Figure 9 and Figure 10 The embodiment schematically shows the process of brewing coffee liquid by using an extraction device of an automatic coffee machine according to an exemplary embodiment of the present invention; Figure 7 This is a cross-sectional view of a fully automatic coffee machine extraction device according to an embodiment of the present invention, showing the structure of the device when it is loaded with coffee powder; Figure 8 This is a second cross-sectional view of a fully automatic coffee machine extraction device according to an embodiment of the present invention, showing the structure of the device during coffee powder pressing; Figure 9 This is a third cross-sectional view of a fully automatic coffee machine extraction device according to an embodiment of the present invention, showing the structure of the device during extraction; Figure 10112 , the coffee bean maker 700 is turned on and the coffee bean maker 701 is turned on and the coffee bean maker 702 is turned on and the coffee bean maker 703 is turned on and the coffee bean maker 703 is turned on and the coffee bean maker 701 is turned on and the coffee bean maker 702 is turned on and the coffee bean maker 702 is turned on and the coffee bean maker 702 is turned on and the coffee bean maker 702 is turned on and the coffee bean maker 702 is turned on and the coffee bean maker 702 is turned on and the coffee bean 701 ... Water is evenly sprayed out to brew coffee powder 701, and coffee liquid 800 is extracted under high pressure and flows into coffee cup 801; the driven gear 103 rotates counterclockwise again by 90 degrees and pauses at the residue discharge position 114, and the electric push rod 306 is started again, driving the residue discharge rod 305 of the push rod assembly 300 to push the powder residue 702 downward and discharge it into the waste water box 400 through the guide sleeve 109. Then the electric push rod 306 is reset, and the coffee liquid extraction is successfully completed. This cycle can be used to extract a single cup or continuously extract refills.

[0033] In this embodiment of the present invention, due to the use of an extraction structure in which a motor 101 drives a driving gear 102, which in turn drives a driven gear 103 (that is, drives a powder cup 116) to rotate, the extracted coffee liquid 800 can flow directly into the coffee cup 801, eliminating the need for pipes to drain the coffee liquid 800 into the coffee cup 801 as in fully automatic coffee machines on the market, thereby ensuring the temperature and flavor of the coffee liquid 800.

[0034] In the present invention, since the extraction head 500 of the "semi-automatic espresso machine" commonly used on the market is adopted, the traditional piston-type extraction structure is not used. The extraction method is completely similar to that of the "semi-automatic espresso machine" and no changes are made. Therefore, the problem of the silicone sealing ring on the traditional extraction piston sticking to the ground can be avoided, and the defect of the traditional extraction piston tearing the powder cup 116 can be avoided.

[0035] In the present invention, a motor 101 is used to drive the driving gear 102, which in turn drives the driven gear 103 (i.e., the powder cup 116) to rotate. This eliminates the traditional piston-type extraction mechanism. The four positions of the extraction device—powder loading, powder pressing, extraction, and residue removal—are relatively independent. This allows the product's design to be consistent with the appearance of well-established "semi-automatic espresso machines" on the market, making it more readily accepted by consumers. Furthermore, a flushing function can be added to the residue removal position to ensure more thorough residue removal, depending on product needs. It should be noted that the present invention is not intended to be limited to semi-automatic espresso machines. Clearly, various modifications can be made by those skilled in the art.

[0036] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. Persons skilled in the art may make various modifications or equivalent substitutions to the present invention. As long as such modifications or equivalent substitutions do not depart from the spirit and purpose of the present invention, they should be deemed to fall within the scope of protection of the present invention. The scope of protection of the present invention is defined by the appended claims.

Claims

1. A fully automatic coffee machine extraction device, mainly comprising: A gear box (100), a magnetic switch (200), a push rod assembly (300), a waste water box (400), an extraction head (500), high-pressure hot water (600), and a bean grinder (700); characterized in that the powder loading position (111) of the gear box (100) is connected to the bean grinder (700) to load powder into the powder cup (116); the gear box (100) drives the powder cup (116) to rotate to perform "powder pressing → extraction → slag discharge → powder loading → powder pressing →" Circular operation; the extraction position (113) of the gear box (100) is connected to the extraction head (500), and the water pipe (501) of the extraction head (500) is connected to high-pressure hot water (600) to extract coffee liquid (800); under the push of the push rod assembly (300), powder is pressed at the powder pressing position (112) of the gear box (100) while the powder residue (702) is discharged from the residue discharge position (114) of the gear box (100) into the waste water box (400).

2. The fully automatic coffee machine extraction device according to claim 1, characterized in that: The gear box (100) mainly includes: a motor (101), a driving gear (102), a driven gear (103), a screw (104), a box body (105), a box cover (106), a filter (107), a coffee nozzle (108), a guide sleeve (109), a magnet (110), a powder loading position (111), a powder pressing position (112), an extraction position (113), a slag discharge position (114), a center hole (115), a powder cup (116), and a main shaft (117); the powder cup (116) and the driven gear (103) are an integrated structure, that is, four powder cups (116) are directly machined on the driven gear (103) at intervals of 90 degrees; the filter (107) is locked on the box body (105) by the screw (104), and the filter (107) and the inner plane of the box body (105) are kept horizontal, and the upper and lower positions overlap without steps; the coffee nozzle ( 108) is assembled on the box body (105) with a threaded structure and can be disassembled for cleaning; the guide sleeve (109) is installed on the box body (105); four magnets (110) are installed on the driven gear (103) at intervals of 90 degrees; in addition, four circular holes are provided on the box cover (106) at intervals of 90 degrees, namely, a powder loading position (111), a powder pressing position (112), an extraction position (113), and a slag discharge position (114); the motor (101) is fixed on the box cover (106) The driving gear (102) is fixed on the rotating shaft of the motor (101); the center hole (115) of the driven gear (103) is aligned with the main shaft (117) of the box body (105) for installation; the driving gear (102) and the driven gear (103) are meshed and installed according to the mark of aligning the dots with the dots; finally, the box body (105) and the box cover (106) are fixed with screws to form the gear box (100).

3. The fully automatic coffee machine extraction device according to claim 1, characterized in that: The magnetic control switch (200) is fixed on the box cover (106) of the gear box (100); when the powder cup (116) rotates to be coaxially aligned with the powder loading position (111) or the powder pressing position (112) or the extraction position (113) or the slag discharge position (114), the magnetic control switch (200) is located directly above the magnet (110).

4. The fully automatic coffee machine extraction device according to claim 2, characterized in that: The motor (101) of the gear box (100) drives the driving gear (102) and drives the driven gear (103); the driven gear (103) is divided into four equal parts, and the driven gear (103) pauses every 90° rotation. During the pause, the magnet (110) on the driven gear (103) rotates to the bottom of the magnetic control switch (200). The magnetic control switch (200) senses the magnetic force of the magnet (110) and controls the start / stop of the motor (101), so that the four powder cups (116) on the driven gear (103) always stop at the powder loading position (111), the powder pressing position (112), the extraction position (113), and the slag discharge position (114).

5. The fully automatic coffee machine extraction device according to claim 2, characterized in that: The four powder cups (116) on the driven gear (103) of the gear box (100) are bottomless structures, and a plane-matching and plane-sealed structure is formed between the driven gear (103) and the box body (105), so that the bottomless powder cups (116) of the driven gear (103) do not leak when rotating on the inner plane of the box body (105) to transport coffee powder.

6. The fully automatic coffee machine extraction device according to claim 1, characterized in that: The push rod assembly (300) mainly includes: a bracket (301), a spring (302), a powder pressing hammer (303), a latch (304), a slag discharge rod (305), and an electric push rod (306); the powder pressing position and the slag discharge position share a common electric push rod (306), the pushing stroke required for slag discharge is greater than the pushing stroke required for powder pressing, and the powder pressing hammer (303) adopts an elastic structure, utilizing the elastic characteristics of the spring (302) to accommodate the structural difference in stroke.

7. The fully automatic coffee machine extraction device according to claim 1, characterized in that: The wastewater box (400) mainly comprises: a powder residue box (401), a powder residue bin (401A), a wastewater bin (401B), a coaster (402), and a drainage hole (403); wherein the bottom of the powder residue bin (401A) is a sloped structure, tilted toward the wastewater bin (401B); under the pressure of the residue discharge rod (305), the powder residue (702) is discharged from the residue discharge position (114) through the guide sleeve (109) into the powder residue bin (401A); while clean water enters the powder residue bin (401A), flows through the slope and the drainage hole (403), and finally flows into the wastewater bin (401B), thereby achieving separation of the powder residue (702) and wastewater.

8. The fully automatic coffee machine extraction device according to claim 1, characterized in that: The extraction head (500) mainly includes: a water pipe (501), a bracket (502), a sealing gasket (503), a screw (504), a shower head (505), and a retaining spring (506); the water pipe (501) is connected to a high-pressure hot water (600) and inputs hot water at 9 to 15 bar; the shower head (505) sprays water evenly to brew coffee powder (701) and extracts coffee liquid (800) under high pressure; the sealing gasket (503) seals the extraction head (500) and the cup mouth of the powder cup (116).

9. The fully automatic coffee machine extraction device according to claim 1, characterized in that: The bean grinder (700) is started to grind the roasted coffee beans into coffee powder (701), and then stops after the coffee powder is filled into the powder cup (116) at the powder filling position (111). The motor (101) of the gear box (100) drives the driving gear (102) to rotate clockwise, driving the driven gear (103) to rotate counterclockwise by 90 degrees and then pause to reach the powder pressing position (112). The electric push rod (306) is started to drive the powder pressing hammer (303) of the push rod assembly (300) to compact the coffee powder (701) in the powder cup (116) and then reset. The driven gear (103) rotates counterclockwise by 90 degrees again and then pauses to reach the extraction position (113). The extraction head (500) inputs 9 to 15 The high-pressure hot water (600) of 1 bar is evenly sprayed out through the shower head (505) to brew the coffee powder (701), and the coffee liquid (800) is extracted with high pressure and flows into the coffee cup (801); the driven gear (103) rotates counterclockwise again by 90 degrees and stops at the residue discharge position (114), and the electric push rod (306) is started again, driving the residue discharge rod (305) of the push rod assembly (300) to push the powder residue (702) downward and discharge it into the waste water box (400) through the guide sleeve (109), and then the electric push rod (306) is reset to complete one round of coffee liquid extraction.

10. The fully automatic coffee machine extraction device according to claim 9, characterized in that: The extraction device can brew coffee in a single cup or in a cyclic operation to continuously extract and refill cups.

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