Full-automatic coffee machine and powder feeding device and method thereof

Abstract

The full-automatic coffee machine is characterized in that the full-automatic coffee machine comprises a machine shell, a bean grinding system, the powder feeding device, a brewing assembly, a residue box, a control panel and a power panel, the bean grinding system, the powder feeding device, the brewing assembly, the residue box, the control panel and the power panel are arranged in the machine shell, and the bean grinding system comprises a bean grinding frame, a bean bin, a bean grinding motor, a knife grinding assembly, a powder throwing piece, a powder inlet, a powder outlet and a powder inlet pipeline, the powder feeding device is arranged between the bean grinding system and the brewing assembly, the powder feeding device comprises an annular powder feeding piece, a powder feeding motor, a first switch and a second switch, the annular powder feeding piece is driven by the powder feeding motor and can reciprocate between the coffee powder outlet and the brewing assembly, movement of the annular powder feeding piece is controlled by the first switch and the second switch, and accurate positioning is ensured. The coffee machine ingeniously solves the problems of accurate quantification of coffee powder, leakage prevention, coffee cake cleaning and the like, and has the advantages of high efficiency, accuracy, reliability and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and more particularly to a coffee machine and a powder feeding device and method thereof. 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. For example, the Chinese patent authorization announcement number is CN208925924U, which discloses an automatic powder feeding device and a coffee bean grinding machine, which includes a support body, two guide slides, a driving device, a transmission mechanism, a trigger mechanism and a brewing chamber, wherein the two guide slides are arranged in parallel on the support body, and the openings of the two guide slides are arranged opposite to each other; the brewing chamber is arranged between the two guide slides, and it forms a detachable sliding connection with the two guide slides respectively, and can move along the guiding direction of the guide slides; the transmission mechanism forms a sliding connection with the two guide slides, and is respectively connected to the driving device and the brewing chamber, and the driving device drives the brewing chamber to move through the transmission mechanism; when the transmission mechanism moves and triggers the trigger mechanism, the brewing chamber can stop at a set position, thereby avoiding the phenomenon of powder falling during use and optimizing the user experience. However, the prior art still has some shortcomings. First, the powder feeding structure is complicated, which increases the manufacturing difficulty and cost of the equipment. Secondly, the accuracy of the coffee powder feeding process is not high enough, and it is difficult to meet the user's requirements for coffee quality. Furthermore, the existing powder feeding devices often lack flexibility and are difficult to adapt to different types and amounts of coffee powder. In addition, coffee powder is prone to blockage or leakage during the transmission process, affecting the normal operation and sanitation of the coffee machine. Finally, the powder feeding devices in the prior art are not well coordinated with other components (such as the grinding system and the brewing component), making it difficult to achieve efficient operation of the fully automatic coffee machine.

[0003] These problems seriously affect the performance and user experience of fully automatic coffee machines. For example, the complexity of the powder feeding structure not only increases production costs, but also may make repairs and maintenance difficult. Insufficient feeding accuracy may lead to unstable coffee taste and affect user satisfaction with the product. The lack of flexibility of the powder feeding device limits the scope of application of the coffee machine and cannot meet the personalized needs of different users. Blockage and leakage problems not only affect the normal use of the coffee machine, but may also cause health hazards. Finally, the lack of coordination between the powder feeding device and other components may lead to low efficiency of the whole machine and affect the user experience.

[0004] In view of the above problems, the existing technology needs to be improved urgently. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies of the prior art and to provide a stable and reliable fully automatic coffee machine which can accurately control the amount of coffee powder and prevent leakage of coffee powder, has a simplified structure and does not require manual intervention.

[0006] Another object of the present invention is to provide a fully automatic coffee machine powder feeding device which is stable and reliable, can accurately control the amount of coffee powder, prevent coffee powder leakage, has a simplified structure, and does not require manual intervention.

[0007] Another object of the present invention is to provide a stable and reliable method for feeding coffee powder to a fully automatic coffee machine, which can accurately control the amount of coffee powder and prevent leakage of coffee powder without manual intervention.

[0008] The present invention adopts the following technical solutions to achieve the above purpose:

[0009] A fully automatic coffee machine, characterized in that it comprises a housing and a bean grinding system, a powder feeding device, a brewing component, a grounds box, a control panel and a power board arranged therein.

[0010] The bean grinding system includes a bean grinding rack and a bean bin, a bean grinding motor, a grinder assembly, a powder throwing piece, a powder inlet, a powder outlet, and a powder inlet pipe. The grinder assembly is connected to the bean bin, and the grinder motor is connected to drive the grinder assembly to grind the coffee beans into powder. The powder inlet pipe is arranged outside the grinder assembly, the powder inlet is arranged at the upper part of the powder inlet pipe, and the powder outlet is arranged at the lower part. The powder throwing piece corresponds to the powder inlet and throws the coffee powder into the powder inlet pipe, and enters the powder feeding device through the powder outlet.

[0011] The powder feeding device is arranged between the coffee bean grinding system and the brewing component, and includes an annular powder feeding member, a powder feeding motor, and a switch component; the switch component includes a first switch and a second switch used in combination, or a second switch used alone; the annular powder feeding member is driven by the powder feeding motor and can reciprocate between the coffee powder outlet and the brewing component, and the movement or stop of the annular powder feeding member is controlled by the switch component;

[0012] The brewing assembly includes a brewing head assembly and a brewing chamber assembly which are arranged corresponding to each other. The brewing head assembly includes a brewing motor, a brewing head frame, a ring gear, and a brewing head. The brewing motor rotates and connects the ring gear and the brewing head in sequence. The ring gear rotates on the periphery and drives the brewing head to move up and down. The brewing head frame clamps the brewing motor, the ring gear, and the brewing head on the upper part of the casing. A filter sheet and a coffee liquid outlet are arranged at the lower part of the brewing head. The ring gear rotates between the brewing head frame and the casing.

[0013] The brewing chamber assembly includes a brewing shell, a brewing chamber, a filter, a rack, a limiter or a limiter, a gear and a coffee powder support plate. The coffee powder support plate and the brewing chamber are arranged on the upper part of the brewing shell, the filter is arranged at the bottom of the brewing chamber, the rack, the limiter or the limiter are arranged at the lower part of the filter, the gear is arranged on the side of the rack, and the second magnet is arranged around the limiter or the limiter. The rack slides up and down in the middle through hole of the brewing shell, the limiter or the limiter slides up and down in the brewing shell, a sealing ring is arranged around the filter and is sealed and connected with the inner side of the brewing chamber, a sealing ring is arranged on the upper end of the rack and is sealed and slidably connected with the through hole at the lower part of the brewing chamber, the gear is rotatably connected with the motor, the gear drives the rack to move up and down, and a filter lifting signal plate corresponding to the second magnet is arranged on the outer side of the brewing shell;

[0014] Switches are respectively arranged on the upper and lower parts of the filter lifting signal plate to control the rack to move up and down and stop. The filter lifting signal plate, the brewing head lifting signal plate, the third switch, the fourth switch and the control panel are electrically connected to the power supply board.

[0015] As a further explanation of the above scheme, a third magnet is arranged on one side of the upper part of the brewing head, and a brewing head lifting signal board is arranged on the periphery corresponding to the third magnet, or the descending distance of the brewing head is controlled by detecting the current change of the brewing motor and electrically connecting with the power board; the brewing chamber assembly is connected to the heating element, and the casing is provided with a groove adapted to assemble and connect the brewing shell, and the coffee powder support plate is arranged on the upper part of the brewing shell or the coffee powder support plate is arranged on the groove of the casing and is level with the brewing chamber opening.

[0016] Furthermore, a plurality of switches are provided on the brewing head lifting signal board, including a separation switch, a large-capacity switch, a medium-capacity switch and a small-capacity switch, which are Hall switches or reed tube switches; the brewing motor drives the ring gear to rotate, driving the brewing head to move up and down; when the brewing head descends, the third magnet triggers different switches in sequence: large-capacity switch, positioning height is 15 grams of coffee powder - medium-capacity switch, positioning height is 12 grams of coffee powder - small-capacity switch, positioning height is 9 grams of coffee powder; when the third magnet triggers the corresponding switch, the brewing head stops descending, and the powder pressing and brewing process starts.

[0017] A powder feeding device for a fully automatic coffee machine is characterized in that it includes an annular powder feeding member, a powder feeding motor, a first switch and a second switch, a connecting rod is connected between the powder feeding motor and the annular powder feeding member, the powder feeding motor drives the annular powder feeding member to reciprocate between the coffee powder outlet of the grinding system and the brewing chamber by a swing drive or a translation drive, the first switch and the second switch are respectively arranged outside the connecting rod, the movement of the annular powder feeding member is controlled by the first switch and the second switch to ensure accurate positioning, and the annular powder feeding member stops at the lower part of the powder outlet.

[0018] As a further illustration of the above scheme, the annular powder feeding part is connected to the motor shaft of the powder feeding motor through a connecting rod, and swings back and forth to complete the functions of powder loading, powder unloading and slag pushing; or a rack is set on the side of the connecting rod, a gear is installed on the motor shaft, and the rack is connected to the gear transmission to achieve linear back and forth movement.

[0019] Furthermore, the annular powder feeding member is a structure that is connected from top to bottom. A coffee powder supporting plate is provided below the annular powder feeding member and is combined with the coffee powder receiving container with an opening upward. The coffee powder supporting plate is located above the brewing chamber. The upper opening of the annular powder feeding member is connected to the coffee powder outlet, and the lower opening is fitted with the coffee powder supporting plate. The bottom of the annular powder feeding member is frictionally connected to the surface of the coffee powder supporting plate to push the coffee powder to the upper opening of the brewing chamber and move it to unload it into the brewing chamber.

[0020] Furthermore, a plug hole is arranged on the upper part of the annular powder feeding member, and an elastic member is arranged in the plug hole. The elastic member drives the annular powder feeding member to press down and rub against the surface of the coffee powder supporting plate to move at least a part of the coffee powder without leaking.

[0021] Furthermore, a sealing member is arranged on the periphery of the middle part of the connecting rod connected to the annular powder feeding member, and the sealing member presses down the connecting rod to drive the annular powder feeding member to press down and rub against the surface of the coffee powder supporting plate to prevent at least a part of the coffee powder from leaking.

[0022] Furthermore, a push plate is arranged outside the annular powder delivery member, and the push plate is rotatably arranged above the brewing chamber through a rotating shaft. A torsion spring is sleeved on the rotating shaft. The annular powder delivery member pushes the push plate to push the bean cake into the slag box.

[0023] Furthermore, the annular powder feeding member has a large opening at the top and a small opening at the bottom, with an inclined transition in the middle, which is convenient for loading more coffee powder and easy unloading.

[0024] A powder feeding method for a fully automatic coffee machine is characterized in that it includes the steps of receiving powder, feeding powder, pressing powder and pushing grounds. Coffee beans are ground into powder by a bean grinding system, and the powder falls into an annular powder feeding member through a powder outlet. The annular powder feeding member is driven by a powder feeding motor to move to the top of a brewing chamber, and the coffee powder is poured into the brewing chamber. The brewing head descends, compacts the coffee powder and brews. After brewing is completed, the brewing head rises, and the brewing chamber assembly pushes out the coffee cake. The annular powder feeding member moves again to push the coffee cake into a grounds box.

[0025] Furthermore, in the powder receiving step, a coffee powder support plate is arranged between the brewing chamber assembly and the groove of the casing, and an annular powder feeding member with upper and lower openings is arranged above the coffee powder support plate. The bottom of the annular powder feeding member is fitted with the coffee powder support plate to form an upwardly open powder container. The upper opening of the annular powder feeding member is connected to the powder outlet, the upper part of the powder outlet is connected to the powder inlet, the inner side of the powder inlet is the grinding system, and the coffee powder delivered from the powder outlet falls into the upper part of the coffee powder support plate and the side container of the annular powder feeding member.

[0026] Furthermore, in the powder feeding step, the powder feeding motor controls the annular powder feeding part to swing back and forth through the first switch and the second switch, or the powder feeding motor controls the annular powder feeding part to move back and forth in a straight line through the first switch and the second switch. When the first switch is working, the annular powder feeding part completes unloading the coffee powder into the brewing chamber, and when the second switch is working, the annular powder feeding part resets and stays below the powder outlet to be connected.

[0027] Furthermore, in the powder pressing step, the brewing head is driven by the rotation of the ring gear to drive the thread on the brewing head to move linearly downward into the brewing chamber, and the lower end of the brewing head presses the coffee powder downward, and the third magnet on the upper end of the brewing head drives the switch at the lower end of the brewing head lifting signal plate to work, and the brewing head stops, and the brewing head and the brewing chamber are respectively provided with a water outlet and a water inlet to brew and flow out the coffee liquid.

[0028] Furthermore, in the dregs pushing step, the brewing head resets upward and the brewing chamber assembly works, the rack, the filter, the limiter and the second magnet move upward to push the coffee cake out of the brewing chamber opening, the second magnet drives the signal switch on the upper part of the filter lifting signal plate to stop working, the powder feeding motor works to push the coffee cake away from the upper part of the filter and drop it into the dregs box, or the powder feeding motor works to drive the annular powder feeding member to move, and the rotation drives the coffee cake to separate from the upper part of the filter and drop it into the dregs box.

[0029] The beneficial effects that can be achieved by the present invention using the above technical solution are:

[0030] The present invention mainly solves the problems existing in the existing coffee machines during the feeding, pressing, brewing and cleaning of coffee powder; the overall technical solution includes a bean grinding system, a powder feeding device, a brewing component, a grounds box, a control panel and a power board; the powder feeding component adopts an annular powder feeding component, which is driven by a powder feeding motor and can move back and forth between the coffee powder outlet and the brewing chamber; this design cleverly solves multiple problems such as accurate quantification of coffee powder, prevention of leakage and cleaning of coffee cakes. The advantages of this design are: 1. The annular powder feeding component can accurately control the amount of coffee powder to ensure the consistency of each brewing. 2. The bottom of the annular powder feeding component fits tightly with the coffee powder support plate to prevent coffee powder leakage. 3. The same component completes the two functions of powder feeding and grounds pushing, which simplifies the structure and improves reliability. 4. The whole process is highly automated and does not require manual intervention.

[0031] In addition, the solution also includes a number of auxiliary designs, such as the coordinated use of magnets and switches to ensure the precise control of the movements of each component; the multi-stage design of the brewing head to meet the needs of making coffee of different capacities; the sealing design of the brewing chamber component to ensure the brewing quality, etc. These designs together constitute an efficient, precise and reliable fully automatic coffee machine powder feeding system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of a full cross-sectional view of the main body of the coffee machine for loading coffee powder of the present invention;

[0033] Figure 2 for Figure 1 A partial enlarged view of

[0034] Figure 3 A full cutaway perspective view of the main body of the coffee machine for grinding and filling coffee powder of the present invention;

[0035] Figure 4 A three-dimensional view of the coffee machine housing and brewing chamber assembly;

[0036] Figure 5 A three-dimensional partial unfolded view of a coffee machine;

[0037] Figure 6 A three-dimensional unfolded view of a coffee machine that pushes coffee grounds;

[0038] Figure 7 A three-dimensional partial unfolded view of the coffee machine with the coffee powder tray installed on the body;

[0039] Figure 8 A three-dimensional unfolded view of the coffee machine;

[0040] Fig. 9 A top view of the telescopic annular powder feeding member receiving powder;

[0041] Fig.10 A top view of the swinging annular powder feeding part receiving powder;

[0042] Fig.11 It is a top view of the ring-shaped powder feeding part swinging and loading powder;

[0043] Fig.12 It is a top view of the reset of the swinging annular powder feeding part;

[0044] Fig.13 A top view of the swinging annular powder feeding element pushing coffee cake grounds;

[0045] Fig.14 It is a top view of the reset of the annular powder feeding part;

[0046] Fig.15 This is the right view of the reset of the ring powder feeding part;

[0047] Fig.16 Left view of the reset ring powder feeding unit.

[0048] Description of the accompanying drawings: 01, grounds box, 02, control panel, 03, power board, 1, brewing chamber shell, 2, casing, 3, powder feeding motor, 4, push plate, 5, connecting rod, 6, brewing chamber, 7, first switch, 8, filter lifting signal plate, 9, first spring, 10, coffee powder supporting plate, 11, ring powder feeding member, 12, second switch, 13, first magnet, 14, bottom opening of the ring powder feeding member, 15, powder outlet, 16, coffee powder, 17, filter, 18, powder inlet, 19, bean bin, 20, brewing head, 21, third magnet, 22, seal, 23, coffee cake, 24, powder inlet pipe, 25, brewing motor, 26, brewing head rack, 27, ring gear, 28, groove, 29, clamp Layer channel, 30, bean grinding motor, 31, powder throwing part, 32, knife grinding assembly, 33, brewing head lifting signal board, 34, bean grinding rack, 35, key lock, 36, separation switch, 37, large capacity switch, 38, medium capacity switch, 39, small capacity switch, 101, limiter, 102, second magnet, 103, rack, 104, gear, 105, gear, 106, elastic part, 107, teeth, 108, jack, 109, third switch, 110, fourth switch, A is the top surface of the groove sandwich channel. DETAILED DESCRIPTION

[0049] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present invention.

[0050] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the present invention, "at least" means one or more, unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise specified and limited, the terms "assemble", "connect", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the invention, unless otherwise specified and limited, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “below”, and “above” a second feature includes that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “above”, “below”, and “below” a second feature includes that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] The following is a further description of the specific implementation of the present invention in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the present invention are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the present invention, but cannot be understood as limiting the present invention.

[0054] A fully automatic coffee machine is an appliance that can at least realize the whole process of brewing coffee, such as 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, and the extracted powder cake is pushed out by the powder pushing structure and then scraped off by the powder scraper. However, in the prior art, the powder feeding structure is complicated, and the accuracy of the coffee powder feeding process is not high enough, which is difficult to meet people's use needs, and its structure needs to be further improved.

[0055] The main technical problem solved by the present application is: how to solve the problem of accurate transfer of coffee powder from the grinding system to the brewing component in an automatic coffee machine.

[0056] The technical means adopted in this application are: Figure 1-Figure 16As shown, the present invention is a fully automatic coffee machine, including a housing 2 and a bean grinding system, a powder feeding device, a brewing component, a dregs box 01, a control panel 02 and a power board 03 arranged therein, the bean grinding system includes a bean grinding rack 34 and a bean bin 19 arranged thereon, a bean grinding motor 30, a knife grinding assembly 32, a powder throwing piece 31, a powder inlet 18, a powder outlet 15, and a powder inlet pipe 24, the knife grinding assembly 32 is connected through the bean bin 19, and the bean grinding motor 30 is connected to drive the knife grinding assembly 32 to grind the coffee beans into powder, wherein the knife grinding assembly can adopt a cone grinding, a flat grinding, or a blade grinding method. The powder inlet pipe 24 is arranged outside the knife grinding assembly 32, the powder inlet 18 is arranged at the upper part of the powder inlet pipe 24, and the powder outlet 15 is arranged at the lower part, the powder throwing piece 31 is arranged parallel to the powder inlet 18 to throw the coffee powder into the powder inlet pipe 24, and enter the powder feeding device through the powder outlet 15, the bean grinding motor is located at the lower part of the bean grinding rack, and the bean grinding rack is connected to the housing for shock absorption and positioning. The powder feeding device is arranged between the grinding system and the brewing component, and the powder feeding device includes an annular powder feeding member 11, a powder feeding motor 3, a push plate 4, a connecting rod 5, a first switch 7, a first spring 9, a second switch 12, a first magnet 13, a bottom opening 14 of the annular powder feeding member, a sealing member 22, an elastic member 106, and a socket 108. The annular powder feeding member 11 is driven by the powder feeding motor 3 and can move back and forth between the coffee powder outlet and the brewing component. The movement of the annular powder feeding member is controlled by the first switch 7 and the second switch 12 to ensure accurate positioning.

[0057] The brewing assembly includes a brewing head assembly and a brewing chamber assembly which are arranged corresponding to each other. The brewing head assembly consists of a brewing motor 25, a brewing head frame 26, a ring gear 27, a brewing head 20, and a third magnet 21. The brewing motor 25 rotates and connects the ring gear 27 and the brewing head 20 in sequence. The ring gear 27 rotates around the periphery of 20 and drives the brewing head 20 to move up and down. The brewing head frame 26 clamps the brewing motor 25, the ring gear 27, and the brewing head 20 on the upper part of the casing 2. The third magnet 21 is arranged on one side of the upper part of the brewing head 20. A brewing head lifting signal plate 33 is arranged corresponding to the periphery of the third magnet 21. A filter sheet and a coffee liquid outlet are arranged at the lower part of the brewing head 20. The ring gear 27 rotates between the brewing head frame 26 and the main body 2. The brewing chamber assembly is composed of a brewing shell 1, a brewing chamber 6, a filter 17, a key lock 35, a rack 103, a limiter 101, a gear 104 and a coffee powder support plate 10. The coffee powder support plate 10 and the brewing chamber 6 are arranged on the upper part of the brewing shell 1, the filter 17 is arranged at the bottom of the brewing chamber 6, and the rack 103 and the limiter 101 are arranged at the lower part. The gear 104 is arranged on the side of the rack 103, and the second magnet 102 is arranged on the periphery of the limiter 101. The rack 103 is arranged in the brewing shell 1 The filter 17 is provided with a sealing ring on the periphery thereof and is sealed and connected with the inner side of the brewing chamber 6. The upper end of the rack 103 is provided with a sealing ring and is sealed and slidably connected with the lower through hole of the brewing chamber 6. The gear 104 is rotatably connected with the motor. The gear 104 drives the rack 103 to move up and down. The lower limiter 101 of the rack 103 is provided with a second magnet 102. The second magnet 102 is correspondingly provided with a filter lifting signal plate 8. The filter lifting signal plate 8 is provided with switches on the upper and lower parts to control the rack 103 to move up and down and stop. The filter lifting signal plate 8, the brewing head lifting signal plate 33, the first switch 7, the second switch 12, the third switch 109, the fourth switch 110 and the control panel 02 are electrically connected with the power supply board 03. The filter lifting signal plate 8, the brewing head lifting signal plate 33, the first switch 7, the second switch 12 and the control panel 02 are configured as Hall, reed switch and micro switch.

[0058] The design of the brewing component enables the coffee powder 16 to be compacted and brewed, and the cooperation of the filter 17 and the rack 103 enables the brewed coffee cake 23 to be smoothly pushed into the grounds box. By setting up multiple travel switches and signal boards, precise coordination between the components is achieved, ensuring the efficient operation of the fully automatic coffee machine. For example, the grinder component of the bean grinding system is driven by the bean grinding motor to grind the coffee beans into powder; the ground coffee powder 16 enters the powder feeding device through the powder feeding pipe; the annular powder feeding part of the powder feeding device can move back and forth between the coffee powder outlet and the brewing component under the drive of the powder feeding motor to accurately feed the coffee powder into the brewing component. The brewing head of the brewing component is driven by the brewing motor to move up and down through the rotation of the ring gear to compact the coffee powder and brew; the brewed coffee liquid flows out through the coffee liquid outlet at the bottom of the brewing head, and the coffee cake is pushed into the grounds box through the cooperation of the rack and the filter of the brewing chamber component.

[0059] The present application also proposes that the brewing chamber assembly is connected with a heating element, the housing is provided with a groove 28 adapted to assemble and connect the brewing shell, and the coffee powder support plate is arranged on the upper part of the brewing shell or on the groove of the housing where the coffee powder support plate is arranged, and is level with the brewing chamber opening. In the present application, the brewing chamber assembly is heated by the heating element to ensure the stability and consistency of the water temperature during the brewing process, thereby improving the extraction effect of the coffee. The groove design on the housing enables the brewing chamber housing to be firmly assembled and connected, providing stability and consistency of operation. The coffee powder support plate is flexible in setting position, and can be installed on the upper part of the brewing chamber housing or on the groove of the housing according to actual needs, so that the coffee powder can smoothly enter the brewing chamber. The design of the brewing chamber assembly connected with a heating element can be implemented in a variety of ways, for example, the heating element can be an electric heating tube, a heating plate or other suitable heating elements. The groove design on the housing can be customized according to the shape of the brewing chamber housing to ensure the tightness and stability of the assembly. The coffee powder support plate can be detachable, which is convenient for cleaning and maintenance, and the material of the support plate can be selected from high temperature resistant metal or food grade plastic to ensure safe use.

[0060] A plurality of switches are arranged on the brewing head lifting signal plate 33, including a separation switch 36, a large capacity switch 37, a medium capacity switch 38 and a small capacity switch 39, which are Hall switches or reed tube switches; the brewing motor drives the ring gear to rotate, driving the brewing head to move up and down; when the brewing head descends, the third magnet triggers different switches in sequence: large capacity switch, positioning height is 15 grams of coffee powder - medium capacity switch, positioning height is 12 grams of coffee powder - small capacity switch, positioning height is 9 grams of coffee powder; when the third magnet triggers the corresponding switch, the brewing head stops descending, and the powder pressing and brewing process starts.

[0061] The technical solution of this application aims to solve the problem of low accuracy in the feeding process of coffee powder in the prior art. By setting multiple switches on the brew head lifting signal board, the descending height of the brew head can be accurately controlled, thereby achieving accurate positioning of coffee powder of different capacities. This design not only improves the accuracy of coffee powder feeding, but also meets the needs of users for different amounts of coffee powder.

[0062] Specifically, the brewing motor drives the brewing head up and down through the ring gear. When the brewing head descends, the third magnet triggers the large capacity switch, the medium capacity switch and the small capacity switch in sequence. Each switch corresponds to a different amount of coffee powder. When the third magnet triggers the corresponding switch, the brewing head stops descending and starts the powder pressing and brewing process. For example, when the third magnet triggers the large capacity switch, the brewing head is positioned at the position of 15 grams of coffee powder; when the medium capacity switch is triggered, it is positioned at the position of 12 grams of coffee powder; when the small capacity switch is triggered, it is positioned at the position of 9 grams of coffee powder.

[0063] The advantage of this technical solution is that by setting multiple switches to achieve precise control of the height of the brewing head, the problem of inaccurate amount of coffee powder can be effectively avoided, and the brewing quality of coffee is improved. In addition, the use of Hall switch or reed switch has high sensitivity and reliability, ensuring the accurate positioning and stable operation of the brewing head. Therefore, the technical solution of this application can significantly improve the user experience and coffee quality of the fully automatic coffee machine.

[0064] The annular powder feeding member 11 of the powder feeding device is combined with the connecting rod 5 to form a badminton racket frame shape, and the powder feeding motor 3 drives the connecting rod 5 to swing back and forth or move back and forth in a straight line between the coffee powder supporting plate 10 and the brewing chamber 6. The first switch 7 and the second switch 12 limit the swinging back and forth movement distance of the annular powder feeding member 11 between the coffee powder supporting plate 10 and the brewing chamber 6. A driving position is set on the connecting rod 5 or the annular powder feeding member 11 to be triggered and connected with the first switch 7 and the second switch 12. A driving hole is set on the connecting rod 5 to adapt to the shaft of the powder feeding motor 3, or teeth 107 are set on the connecting rod 5 to mesh with the gear 105 on the powder feeding motor 3 for transmission.

[0065] The technical solution of the present application is intended to solve the problems in the prior art of complex powder feeding structure, high manufacturing difficulty and cost, low coffee powder feeding accuracy, lack of flexibility, easy blockage or leakage, and insufficient coordination with other components. By adopting a connecting rod or rack-and-pinion transmission method, the back-and-forth swing or linear movement of the annular powder feeding part is achieved, thereby simplifying the structure and reducing manufacturing costs. At the same time, the powder feeding process is more precise and can adapt to different types and amounts of coffee powder, reducing the risk of blockage and leakage, and improving the operating efficiency and sanitary conditions of the equipment.

[0066] The annular powder delivery member 11 is a through structure from top to bottom. A plug hole 108 is provided on the main body of the annular powder delivery member 11. An elastic member 106 is provided in the plug hole 108. The upper part of the elastic member 106 is in elastic contact with the top of the sandwich channel 29 of the groove 28 to drive the annular powder delivery member 11 to be pressed down and to move in close contact with the surface of the coffee powder support plate 10, so that at least a part of the coffee powder does not leak. A first magnet 13 is provided on the upper part of the elastic member 106. The first magnet 13 is evenly squeezed and slidably connected with the top surface A of the sandwich channel of the groove to push the annular powder delivery member 11 to move downward in friction with the coffee powder support plate 10, so that at least a part of the coffee powder will not leak out and enter the brewing chamber 6 to complete the powder loading. The powder delivery motor 3 drives the connecting rod 5 to swing back and forth or move back and forth in a straight line between the coffee powder support plate 10 and the brewing chamber 6, and at the same time pushes the push plate 4 to rotate along the axis, and the annular powder delivery member 11 returns to the lower part of the original powder outlet 15, and then the brewing head 20 moves into the brewing chamber 6. The coffee powder is squeezed into a cake for brewing in the brewing chamber 6. After brewing is completed, the brewing head 20 and the brewing chamber assembly 17 work simultaneously to rise and the coffee powder cake is separated from the opening of the brewing chamber 6. The brewing head 20 is reset, and the powder feeding motor 3 drives the connecting rod 5 to swing back and forth or move back and forth in a straight line between the coffee powder support plate 10 and the brewing chamber 6. The annular powder feeding member 11 works again to complete the movement from the coffee powder support plate 10 and the powder outlet 15 to the brewing chamber 6 and the brewing head 20, and then moves in the opposite direction from the brewing chamber 6 and the brewing head 20 to the coffee powder support plate 10 and the powder outlet 15. The coffee powder can smoothly enter the brewing chamber during the powder feeding process, avoiding the problem of blockage or leakage of the coffee powder during the transmission process. The fitting design of the coffee powder support plate and the annular powder feeding member ensures the stability and accuracy of the coffee powder during the transmission process, thereby improving the overall performance and user experience of the coffee machine. Specifically, the upper opening of the annular powder delivery part is connected to the coffee powder outlet, and the lower opening is fitted with the coffee powder support plate to form a complete powder delivery channel. The powder delivery motor drives the annular powder delivery part to move back and forth between the coffee powder outlet of the grinding system and the brewing chamber to ensure that the coffee powder can be accurately delivered to the brewing chamber. Through this design, the transmission process of coffee powder is smoother, the possibility of blockage and leakage is reduced, and the working efficiency and coffee quality of the coffee machine are improved.

[0067] The elastic member 106 is configured as a spring, elastic rubber, or a spring sheet, and the first magnet 13 is a magnetic bead that drives the second switch 12; the first magnet 13 and the elastic member 106 are magnetically attracted and do not fall off; the configuration of the elastic member enables the annular powder feeding member to automatically adjust the degree of contact with the coffee powder support plate during movement, thereby avoiding leakage of coffee powder due to insufficient friction. This structure can not only improve the accuracy of powder feeding, but also reduce the loss of coffee powder during transmission, thereby ensuring the normal operation and sanitation of the coffee machine.

[0068] The annular powder feeding member 11 has a large upper opening and a small lower opening. The upper opening is inclined relative to the lower opening, so the overloading capacity is large and the coffee powder can be easily unloaded. Specifically, the upper opening of the annular powder feeding member is larger, so that more coffee powder can enter it, while the lower opening is smaller. Through the design of the inclined transition, the coffee powder can smoothly slide to the lower opening under the action of gravity, and then enter the brewing chamber. This design not only optimizes the structure of the powder feeding device, but also reduces the blockage and leakage of coffee powder during the transmission process, ensuring the normal operation and sanitary condition of the coffee machine. Therefore, the present application solves the problems of complex powder feeding structure, high manufacturing cost, low feeding process accuracy, insufficient flexibility, and coffee powder blockage or leakage in the prior art by improving the structure of the annular powder feeding member, thereby improving the efficiency and user experience of the fully automatic coffee machine.

[0069] The present application also proposes that a push plate 4 is provided on the outside of the annular powder delivery member, and the push plate 4 is rotatably arranged above the brewing chamber 6 through a rotating shaft, and a torsion spring is sleeved on the rotating shaft. The annular powder delivery member pushes the push plate 4, so that the bean cake can be pushed into the slag box. During the slag pushing process, the push plate realizes an effective slag pushing function through the cooperation of the rotating shaft and the torsion spring. The push plate can be designed in a variety of ways. For example, the push plate can be designed in different shapes and sizes to adapt to bean cakes of different sizes and shapes. In addition, the material selection of the push plate can also be diversified. For example, wear-resistant and corrosion-resistant materials can be selected to increase the service life of the push plate.

[0070] The present application also proposes a fully automatic coffee machine powder feeding method, which includes the steps of receiving powder, feeding powder, pressing powder and pushing grounds. The coffee beans are ground into powder by a bean grinding system, and the powder falls into an annular powder feeding member through a powder outlet. The annular powder feeding member is driven by a powder feeding motor to move to the top of a brewing chamber, and the coffee powder is poured into the brewing chamber. The brewing head descends, compacts the coffee powder and brews; after brewing is completed, the brewing head rises, and the brewing chamber assembly pushes out the coffee cake; the annular powder feeding member moves again to push the coffee cake into the grounds box. Specifically, the steps of loading powder into the annular powder delivery member 11 are as follows: a coffee powder support plate 10 is arranged between the brewing chamber assembly and the groove 28, an annular powder delivery member 11 with upper and lower openings is arranged on the upper part of the coffee powder support plate 10, the bottom of the annular powder delivery member 11 is fitted with the coffee powder support plate 10 to form an upwardly open powder loading container, the upper opening of the annular powder delivery member 11 is connected to the powder outlet 15, the upper part of the powder outlet 15 is connected to the powder inlet 18, the inner side of the powder inlet 18 is a bean grinding system, and the coffee powder discharged from the powder outlet 15 falls into the upper part of the coffee powder support plate 10 and the side container of the annular powder delivery member 11;

[0071] Powder feeding step: the connecting rod 5 at the outer end of the annular powder feeding member 11 is connected to the powder feeding motor 3, and the powder feeding motor 3 controls the annular powder feeding member 11 to swing back and forth through the first switch 7 and the second switch 12, or the powder feeding motor 3 controls the annular powder feeding member 11 to move back and forth in a straight line through the first switch 7 and the second switch 12. When the first switch 7 is working, the annular powder feeding member 11 completes unloading the coffee powder into the brewing chamber 6, and when the second switch 12 is working, the annular powder feeding member 11 resets and stays below the powder outlet 15 to be connected;

[0072] Powder pressing step: the brewing head 20 rotates through the ring gear 27 to drive the thread on the brewing head 20 to drive the brewing head 20 to move linearly downward into the brewing chamber 6, and the lower end of the brewing head 20 presses the coffee powder downward, and the third magnet 21 at the upper end of the brewing head 20 drives the lower end switch of the brewing head lifting signal plate 33 to work, and then the brewing head 20 stops, and the brewing head 20 and the brewing chamber 6 are respectively provided with a water outlet and a water inlet to brew the coffee liquid out;

[0073] Grounds pushing step: the brewing head 20 moves upward to reset and the brewing chamber assembly works, the rack 103, the filter 17, the limiter 101, and the second magnet 102 move upward to push the coffee cake 23 out of the brewing chamber 6 opening, the second magnet 102 drives the signal switch on the upper part of the filter lifting signal plate 8 to stop working, the powder feeding motor 3 works to drive the annular powder feeding member 11 to move the coffee cake away from the upper part of the filter 17 and drop it into the grounds box 01, or the powder feeding motor 3 works to drive the annular powder feeding member 11 to move 4 to push and rotate the coffee cake away from the upper part of the filter and drop it into the grounds box 01.

[0074] The innovative extensions of this technical solution are as follows:

[0075] 1. Deep innovation in the design of the ring powder feeding component and its working principle

[0076] Application scenario: High-end commercial coffee machines used in busy coffee shops.

[0077] In this scenario, the coffee machine needs to work continuously for a long time, process a large number of orders, and at the same time ensure the consistency of the quality of each cup of coffee. This high-intensity use may cause wear and tear on the friction connection between the ring powder feeder and the coffee powder tray, affecting the sealing effect and causing coffee powder leakage. In addition, after long-term use, coffee oil may accumulate in the ring powder feeder, affecting the fluidity and quantitative accuracy of the coffee powder.

[0078] To solve these problems, the following optimization solutions are proposed:

[0079] A. Structural optimization: 1. Add a replaceable wear-resistant sealing ring at the bottom of the annular powder delivery unit, using food-grade silicone material to improve wear resistance while ensuring a close fit with the coffee powder tray. 2. Design a spiral guide groove inside the annular powder delivery unit to promote uniform flow of coffee powder and reduce accumulation. 3. Add a heating element outside the annular powder delivery unit to reduce the condensation of coffee oil inside through temperature control.

[0080] B. Software function optimization: 1. Develop an automatic detection system to determine whether the ring powder feeding part is worn or blocked by monitoring the movement resistance and coffee powder delivery volume of the ring powder feeding part. 2. Design an intelligent cleaning program to automatically start the cleaning cycle when an abnormality is detected, and use high-pressure steam or special cleaning agents to clean the ring powder feeding part.

[0081] C. Optimization of usage: 1. Introducing modular design to make the ring powder feeding parts easy to disassemble and replace, which is convenient for daily maintenance and cleaning. 2. Developing a special cleaning tool kit, including brushes and cleaning agents, to facilitate operators to perform deep cleaning regularly.

[0082] Through these optimizations, the reliability and accuracy of the ring powder feeding parts in high-intensity use environments can be significantly improved, the service life of the equipment can be extended, and the consistency of coffee quality can be ensured.

[0083] 2. Deep innovation of the multi-stage design of the brewing head assembly

[0084] Application scenario: Intelligent home coffee machine, users can remotely control it through a mobile phone APP.

[0085] In this scenario, users may need to precisely adjust the coffee concentration and taste according to their personal taste, rather than just choosing the preset large, medium, and small capacities. At the same time, different types of coffee beans may require different pressures and brewing times to achieve the best results. In addition, after long-term use, the pressure of the brewing head may change, affecting the coffee quality.

[0086] To solve these problems, the following optimization solutions are proposed:

[0087] A. Structural optimization: 1. The brew head lifting mechanism is changed to a precision screw drive, which is matched with a high-precision stepper motor to achieve millimeter-level precision control. 2. A pressure sensor is added to the bottom of the brew head to monitor the pressure changes during the powder pressing and brewing process in real time. 3. A replaceable brew head chassis is designed to adapt to the grinding particle size and pressure requirements of different coffee beans.

[0088] B. Software function optimization: 1. Develop an adaptive pressure control algorithm to automatically adjust the optimal pressure according to the amount of coffee powder, grinding degree and coffee type. 2. Design a personalized configuration system that allows users to accurately set the brewing head position, pressure and time through the APP and save them as personal preferences. 3. Implement intelligent diagnosis function to determine whether the device needs calibration or maintenance by analyzing the pressure curve.

[0089] C. Usage optimization: 1. Introduce an interactive guide program to help users gradually adjust and optimize brewing parameters according to their personal taste. 2. Develop a coffee knowledge base to provide users with the best brewing suggestions for different coffee beans, including recommended pressure and time. 3. Design remote diagnosis and calibration functions to allow technical support personnel to perform remote debugging via the network.

[0090] These optimizations will greatly improve the intelligence and personalized experience of home coffee machines, allowing users to make coffee that better suits their personal tastes, while also facilitating long-term maintenance and performance stability of the equipment.

[0091] 3. Deep innovation in the design of the brewing chamber component and its working principle

[0092] Application scenario: The central kitchen of a large coffee chain needs to make cold brew coffee in batches.

[0093] In this scenario, the traditional hot brewing method may not be applicable, and a long cold brewing process is required. At the same time, mass production requires a higher degree of automation and cleaning efficiency. In addition, the expansion and sedimentation of coffee powder during the cold brewing process may lead to problems such as difficulty in filtering and incomplete cleaning.

[0094] To solve these problems, the following optimization solutions are proposed:

[0095] A. Structural optimization: 1. The brewing chamber is transformed into a detachable multi-layer structure, including an upper water injection layer, a middle cold extraction layer, and a lower filtration layer. 2. Multiple adjustable stirring paddles are designed in the cold extraction layer to ensure that the coffee powder is fully in contact with water. 3. The filtration layer adopts a multi-stage filtration design, including a primary metal filter and a fine ceramic filter membrane. 4. A refrigeration system is added outside the brewing chamber to maintain a constant temperature environment during the cold extraction process.

[0096] B. Software function optimization: 1. Develop an intelligent cold brew program to automatically adjust the cold brew time and stirring frequency according to the coffee bean type, grinding degree and target concentration. 2. Design a batch management system to track the production parameters and quality data of each batch of cold brew coffee. 3. Implement remote monitoring function to allow quality control personnel to view production status and adjust parameters in real time.

[0097] C. Optimization of usage: 1. Design a quick replacement system to allow rapid replacement of a brewing chamber after cold brewing in one chamber, thereby improving production efficiency. 2. Develop a dedicated cleaning cycle program to automatically clean the various parts of the brewing chamber using high-pressure water and professional cleaning agents. 3. Introduce modular design to facilitate the rapid disassembly, cleaning and replacement of different parts.

[0098] These optimizations will enable the brewing chamber components to adapt to the needs of large-scale cold brew coffee production, improve production efficiency and product quality consistency, while simplifying the cleaning and maintenance process to adapt to the high-intensity use environment of the central kitchen.

[0099] Compared with the prior art, the present invention solves the problem of accurate transmission of coffee powder from the bean grinding system to the brewing component in a fully automatic coffee machine through the above technical solution. After the bean grinding system grinds the coffee beans into powder, the coffee powder is fed into the powder feeding device through the powder feeding pipe and the powder throwing part. The powder feeding device realizes accurate transmission of coffee powder through the cooperation of the annular powder feeding part and the powder feeding motor, and ensures accurate positioning through the travel switch, thereby ensuring that the coffee powder can accurately enter the brewing component, realizing an automated and precise coffee powder transmission process.

[0100] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A fully automatic coffee machine, characterized in that: It includes a housing and a bean grinding system, a powder feeding device, a brewing component, a grounds box, a control panel and a power board. The bean grinding system includes a bean grinding rack and a bean bin, a bean grinding motor, a grinder assembly, a powder throwing piece, a powder inlet, a powder outlet, and a powder inlet pipe. The grinder assembly is connected to the bean bin, and the grinder motor is connected to drive the grinder assembly to grind the coffee beans into powder. The powder inlet pipe is arranged outside the grinder assembly, the powder inlet is arranged at the upper part of the powder inlet pipe, and the powder outlet is arranged at the lower part. The powder throwing piece corresponds to the powder inlet and throws the coffee powder into the powder inlet pipe, and enters the powder feeding device through the powder outlet. The powder feeding device is arranged between the coffee bean grinding system and the brewing component, and includes an annular powder feeding member, a powder feeding motor, and a switch component; the switch component includes a first switch and a second switch used in combination, or a second switch used alone; the annular powder feeding member is driven by the powder feeding motor and can reciprocate between the coffee powder outlet and the brewing component, and the movement or stop of the annular powder feeding member is controlled by the switch component; The brewing assembly includes a brewing head assembly and a brewing chamber assembly which are arranged corresponding to each other. The brewing head assembly includes a brewing motor, a brewing head frame, a ring gear, and a brewing head. The brewing motor rotates and connects the ring gear and the brewing head in sequence. The ring gear rotates on the periphery and drives the brewing head to move up and down. The brewing head frame clamps the brewing motor, the ring gear, and the brewing head on the upper part of the casing. A filter sheet and a coffee liquid outlet are arranged at the lower part of the brewing head. The ring gear rotates between the brewing head frame and the casing. The brewing chamber assembly includes a brewing shell, a brewing chamber, a filter, a rack, a limiter or a limiter, a gear and a coffee powder support plate. The coffee powder support plate and the brewing chamber are arranged on the upper part of the brewing shell, the filter is arranged at the bottom of the brewing chamber, the rack, the limiter or the limiter are arranged at the lower part of the filter, the gear is arranged on the side of the rack, and the second magnet is arranged around the limiter or the limiter. The rack slides up and down in the middle through hole of the brewing shell, the limiter or the limiter slides up and down in the brewing shell, a sealing ring is arranged around the filter and is sealed and connected with the inner side of the brewing chamber, a sealing ring is arranged on the upper end of the rack and is sealed and slidably connected with the through hole at the lower part of the brewing chamber, the gear is rotatably connected with the motor, the gear drives the rack to move up and down, and a filter lifting signal plate corresponding to the second magnet is arranged on the outer side of the brewing shell; Switches are respectively arranged on the upper and lower parts of the filter element lifting signal plate to control the rack to move up and down and stop. The filter element lifting signal plate, the brewing head lifting signal plate, the third switch, the fourth switch and the control panel are electrically connected to the power supply board.

2. A fully automatic coffee machine according to claim 1, characterized in that: The brewing chamber assembly is connected with a heating element, the casing is provided with a groove adapted to be assembled and connected with the brewing shell, the coffee powder support plate is arranged on the upper part of the brewing shell or the coffee powder support plate is arranged on the groove of the casing and is level with the brewing chamber opening.

3. A fully automatic coffee machine according to claim 1, characterized in that: A third magnet is arranged on one side of the upper part of the brewing head, and a brewing head lifting signal board is arranged on the periphery corresponding to the third magnet, or the descending distance of the brewing head is controlled by detecting the current change of the brewing motor and electrically connecting with the power board; a plurality of switches are arranged on the brewing head lifting signal board, including a separation switch, a large-capacity switch, a medium-capacity switch and a small-capacity switch, and these switches are Hall switches or reed tube switches or micro switches; the brewing motor drives the ring gear to rotate, driving the brewing head to move up and down.

4. A powder feeding device for a fully automatic coffee machine, characterized in that: It includes an annular powder feeding member, a powder feeding motor, and a switch assembly; the switch assembly includes a first switch and a second switch used in combination, or the second switch used alone; a connecting rod is connected between the powder feeding motor and the annular powder feeding member, and the powder feeding motor drives the annular powder feeding member to reciprocate between the coffee powder outlet of the grinding system and the upper opening of the brewing chamber by a swing drive or a translation drive. The first switch and the second switch are respectively arranged outside the connecting rod or outside the annular powder feeding member, and the movement of the annular powder feeding member is controlled by the first switch and the second switch. Alternatively, the second switch is arranged between the outer end of the powder feeding motor and the outer end of the annular powder feeding member, and the movement of the annular powder feeding member is stopped by the second switch, and the powder feeding motor is arranged as an automatic reversing bidirectional motor.

5. The powder feeding device of a fully automatic coffee machine according to claim 4, characterized in that: The annular powder feeding part is connected to the motor shaft of the powder feeding motor through a connecting rod, and swings back and forth to complete the functions of powder loading, powder unloading and slag pushing; or a rack is set on the side of the connecting rod, a gear is installed on the motor shaft, and the rack is connected to the gear transmission to achieve linear back and forth movement.

6. The powder feeding device of a fully automatic coffee machine according to claim 4, characterized in that: The annular powder feeding member is a structure that is connected from top to bottom. A coffee powder supporting plate is arranged below the annular powder feeding member and is combined with the coffee powder receiving container with an opening upward. The coffee powder supporting plate is located above the brewing chamber. The upper opening of the annular powder feeding member is connected to the coffee powder outlet, and the lower opening is fitted with the coffee powder supporting plate. The bottom of the annular powder feeding member is frictionally connected to the surface of the coffee powder supporting plate to push the coffee powder to the upper opening of the brewing chamber and move it to unload it into the brewing chamber.

7. The powder feeding device of a fully automatic coffee machine according to claim 4, characterized in that: The annular powder feeding member is provided with an insertion hole at the top, and an elastic member is provided in the insertion hole. The elastic member drives the annular powder feeding member to be pressed down and rubbed against the surface of the coffee powder supporting plate to move at least a portion of the coffee powder without leakage; or, a sealing member is provided at the outer middle part of the connecting rod connected to the annular powder feeding member, and the sealing member presses down the connecting rod to drive the annular powder feeding member to be pressed down and rubbed against the surface of the coffee powder supporting plate to move at least a portion of the coffee powder without leakage.

8. The powder feeding device of a fully automatic coffee machine according to claim 4, characterized in that: A push plate is arranged outside the annular powder delivery member, which is rotatably arranged above the brewing chamber through a rotating shaft, and a torsion spring is sleeved on the rotating shaft; the annular powder delivery member has a large upper opening, a small lower opening, and a bevel transition in the middle.

9. A method for feeding coffee powder to a fully automatic coffee machine, characterized in that: It includes the steps of receiving powder, feeding powder, pressing powder and pushing grounds. The coffee beans are ground into powder by a bean grinding system, and the powder falls into an annular powder feeding member through a powder outlet. The annular powder feeding member is driven by a powder feeding motor to move to the top of a brewing chamber, and the coffee powder is poured into the brewing chamber. The brewing head descends, compacts the coffee powder and brews. After brewing is completed, the brewing head rises, and the brewing chamber assembly pushes out the coffee cake. The annular powder feeding member moves again to push the coffee cake into a grounds box.

10. The method for feeding powder to a fully automatic coffee machine according to claim 9, characterized in that: In the powder receiving step, a coffee powder support plate is arranged between the brewing chamber assembly and the groove of the housing, and an annular powder delivery member with upper and lower openings is arranged above the coffee powder support plate. The bottom of the annular powder delivery member fits with the coffee powder support plate to form an upwardly open powder container. The upper opening of the annular powder delivery member is connected to the powder outlet, and the upper part of the powder outlet is connected to the powder inlet. The inner side of the powder inlet is a grinding system, and the coffee powder delivered by the powder outlet falls into the upper part of the coffee powder support plate and the side container of the annular powder delivery member. In the powder feeding step, the powder feeding motor is controlled by the first switch and the second switch or the second switch controls the annular powder feeding member to swing back and forth, or the powder feeding motor is controlled by the first switch and the second switch or the second switch controls the annular powder feeding member to move back and forth in a straight line, when the first switch is working, the annular powder feeding member completes unloading of coffee powder into the brewing chamber, and when the second switch is working, the annular powder feeding member resets and stays below the powder outlet for through connection; or, when the powder feeding motor works in an automatic two-way manner, the annular powder feeding member completes unloading of coffee powder into the brewing chamber, and when the second switch is working, the annular powder feeding member resets and stays below the powder outlet for through connection; In the powder pressing step, the brewing head drives the thread on the brewing head to move linearly downward into the brewing chamber through the rotation of the ring gear, and the lower end of the brewing head presses the coffee powder downward, and the third magnet on the upper end of the brewing head drives the switch at the lower end of the brewing head lifting signal plate to work, and the brewing head stops, and the brewing head and the brewing chamber are respectively provided with a water outlet and a water inlet to brew and flow out the coffee liquid; In the dregs pushing step, the brewing head moves upward to reset and the brewing chamber assembly works, the rack, filter, limiter or limiter, and the second magnet move upward to push the coffee cake out of the brewing chamber opening, the second magnet drives the signal switch on the upper part of the filter lifting signal plate to stop working, the powder feeding motor works, and the annular powder feeding part pushes the coffee cake away from the upper part of the filter and drops into the dregs box, or the powder feeding motor works to drive the annular powder feeding part to move, and the annular powder feeding part pushes the push plate to rotate, driving the coffee cake to separate from the upper part of the filter and fall into the dregs box.

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