Drip coffee brewing device and drip coffee maker

Abstract

A drip coffee brewing device and a drip coffee maker. The drip coffee brewing device comprises a main holder (100), a conveying mechanism (260), a first plunger assembly (200) and a first driving mechanism (300), wherein the main holder (100) is provided with a brewing cavity (110); the conveying mechanism (260) can be in communication with the brewing cavity (110) and introduce gas into the brewing cavity (110); the first plunger assembly (200) is movably arranged on the main holder (100) in a second direction perpendicular to a first direction; the first plunger assembly (200) can block a first opening (120) when moving to one end of the stroke of the first plunger assembly (200), and can open the first opening (120) when moving to the other end of the stroke of the first plunger assembly (200); and the first driving mechanism (300) is in transmission connection with the first plunger assembly (200), and is used for driving the first plunger assembly (200) to do reciprocating motion within its own stroke. The drip coffee brewing device and the drip coffee maker not only have a fast dripping speed, but also are easy to clean.

Description

Drip coffee brewing device and drip coffee machine Technical Field

[0001] The present invention relates to the technical field of drip coffee machines, and in particular to a drip coffee brewing device and a drip coffee machine. Background Art

[0002] With the development of coffee machine technology, pressure-type coffee machines are now capable of automatically performing operations such as grinding, filling, brewing, draining, and cleaning. For example, Chinese invention patent publication number CN102791171B discloses a fully automatic electric coffee machine consisting of at least a housing, a water tank, a water pump, a brewing group, operating elements, an electrical control unit, and a collection container for coffee residue or coffee grounds, along with a coffee bean container and a grinder. Technical issues

[0003] However, due to the different ways of brewing drip coffee, most conventional drip coffee machines can only automate grinding and dripping, but cannot automate the entire process of grinding, dripping, slag discharge and cleaning. In addition, there have always been problems with slow dripping speed and long production time. Technical Solutions

[0004] In view of the above problems existing in the prior art, the present invention provides a drip coffee brewing device and a drip coffee machine with a fast dripping speed and easy cleaning. The technical solution of the present invention is as follows.

[0005] A first aspect of the present invention provides a drip coffee brewing device, comprising:

[0006] The main support is provided with a brewing cavity, wherein one end of the brewing cavity in the first direction has a first opening;

[0007] a conveying mechanism capable of communicating with the brewing cavity and introducing gas into the brewing cavity;

[0008] a first plunger assembly movably disposed on the main support along a second direction perpendicular to the first direction; the first plunger assembly is capable of blocking the first opening when the first plunger assembly moves to one end of its stroke, and is capable of opening the first opening when the first plunger assembly moves to the other end of its stroke;

[0009] The first driving mechanism is in transmission connection with the first plunger assembly, and the first driving mechanism is used to drive the first plunger assembly to move back and forth within its own stroke.

[0010] In some embodiments, the delivery mechanism is disposed on the first plunger assembly.

[0011] In some embodiments, the first plunger assembly comprises:

[0012] a first bracket, movably disposed on the main bracket along the second direction;

[0013] a first plunger movably disposed on the first bracket along the first direction;

[0014] a second bracket, movably disposed on the first bracket along the second direction, and the second bracket is drivingly connected to the first driving mechanism and the first plunger respectively;

[0015] The second bracket moves relative to the first bracket in the second direction, thereby driving the first plunger to move in the first direction to block or open the first opening. Furthermore, the second bracket and the first bracket move synchronously in the second direction, thereby driving the first plunger to move away from or back to the first opening. This simplifies the movement process and facilitates a simplified transmission structure.

[0016] In some embodiments, the first bracket is provided with a first sliding groove extending along the first direction;

[0017] A second sliding groove is provided on the second bracket, and the second sliding groove extends obliquely along a third direction between the first direction and the second direction and overlaps with the first sliding groove;

[0018] The first plunger is provided with a first slider which is slidably connected to the overlapping area of ​​the first chute and the second chute. This not only has a simple structure and an ingenious design, but also helps to improve the structural compactness of the first plunger assembly and reduce its size.

[0019] In some embodiments, the first bracket has a first column cavity arranged along a first direction, and a first sliding groove is provided on the cavity wall of the first column cavity;

[0020] The second bracket is arranged outside the first bracket;

[0021] The first plunger is movably disposed in the first column cavity, and the first slider passes through the first chute and extends into the second chute. This not only simplifies the structure but also helps improve the movement stability of the first plunger.

[0022] In some embodiments, the second bracket is provided with a spur rack, the first drive mechanism includes a first transmission gear and a first motor connected to the first transmission gear, and the first transmission gear meshes with the spur rack. The rack and pinion mechanism is not only simple in structure and low in cost, but also highly stable.

[0023] In some embodiments, the first plunger assembly further comprises a locking mechanism, wherein the locking mechanism has a locked state for restricting relative displacement of the first bracket and the second bracket and an unlocked state for allowing relative displacement of the first bracket and the second bracket;

[0024] The second bracket has a first stroke close to the first opening and a second stroke away from the first opening; when the second bracket is in the first stroke, the locking mechanism is in an unlocked state; when the second bracket is in the second stroke, the locking mechanism is in a locked state.

[0025] By setting up a locking mechanism, it is possible to avoid interference between the first plunger and the main bracket due to the first plunger moving in the first direction when not opposite to the first opening, and it is also possible to avoid scratching or squeezing one side of the first plunger against the brewing chamber wall.

[0026] In some embodiments, the locking mechanism includes a first elastic pin, the first elastic pin is telescopically arranged on one of the first bracket and the second bracket, and the other of the first bracket and the second bracket is provided with a first limiting groove;

[0027] The first elastic pin can extend into the first limiting groove to limit the relative displacement of the first bracket and the second bracket, and can also be released from the first limiting groove to allow the first bracket and the second bracket to move relative to each other.

[0028] In some embodiments, the locking mechanism further comprises a second elastic pin, the second elastic pin being telescopically disposed on one of the main bracket and the first bracket, and a second limiting groove being disposed on one of the main bracket and the first bracket;

[0029] The second elastic pin is configured to extend into the second limiting slot to limit the follow-up movement of the first bracket when the second bracket is in the first stroke, and to disengage from the second limiting slot to allow the first bracket to follow-up movement when the second bracket is in the second stroke.

[0030] In some embodiments, the first plunger assembly further comprises a scraping component, which is disposed on the first bracket and is capable of scraping off coffee grounds that have been pushed out of the first opening when the first bracket moves back to a position opposite to the first opening.

[0031] In this way, the motion mechanism composed of the first bracket, the second bracket and the first driving mechanism can be reused to drive the scraping component to complete the scraping operation. There is no need to set up a separate motion mechanism for the scraping component. The structural design is ingenious and is beneficial to further simplify the structure of the brewing device.

[0032] In some embodiments, the other end of the brewing cavity in the first direction has a second opening;

[0033] The brewing device also includes a second plunger assembly and a second driving mechanism, and the second plunger assembly extends into the brewing chamber through the first opening; the second driving mechanism is transmission-connected to the second plunger assembly and is used to drive the second plunger assembly to move along the first direction to push the coffee grounds out of the first opening.

[0034] In some embodiments, the second plunger assembly comprises:

[0035] a nut rotatably disposed at the second opening and having its axis extending along the first direction, the nut being transmission-connected to the second driving mechanism;

[0036] a screw rod, threadedly connected to the nut, and one end of the screw rod extends into the brewing cavity through the second opening;

[0037] a second plunger detachably connected to the extending end of the screw rod;

[0038] A stop component is detachably connected to the other end of the screw rod, and the stop component is used to adjust the stroke of the screw rod to limit the screw rod from driving the second plunger to extend from the first opening, or to allow the screw rod to drive the second plunger to extend from the first opening.

[0039] In some embodiments, the invention further comprises a stop sensing member, wherein the stop sensing member is used to trigger the first driving mechanism to stop the first plunger assembly when sensing that the first plunger assembly is at a stop position;

[0040] When the first plunger assembly is located at the middle stop position, the conveying mechanism of the first plunger assembly moves to the top of the brewing cavity and can inject brewing liquid into the brewing cavity, and the first plunger assembly has not yet closed the first opening.

[0041] A second aspect of the present application provides a drip coffee machine, comprising an air supply system and a drip coffee brewing device as described above, wherein the air supply system is connected to the conveying mechanism. Beneficial effects

[0042] In the drip coffee brewing device of an embodiment of the present invention, the first plunger assembly, when moved to one end of its travel, can block the first opening of the brewing chamber, thereby sealing the brewing chamber. During the coffee brewing process, gas can be introduced into the brewing chamber via the conveying mechanism to appropriately increase the air pressure within the sealed brewing chamber. This significantly improves the brewing speed of the drip coffee while maintaining the coffee's taste and concentration. After brewing, gas can also be introduced into the brewing chamber via the conveying mechanism to accelerate the discharge of waste liquid and dry the coffee grounds, facilitating their removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] FIG1 and FIG2 are perspective views of a drip coffee brewing device according to an embodiment of the present invention at different viewing angles;

[0044] FIG3 is an exploded view of a portion of the drip coffee brewing device according to an embodiment of the present invention;

[0045] FIG4 is an exploded view of another portion of the drip coffee brewing device according to an embodiment of the present invention;

[0046] 5 to 12 are cross-sectional views of a drip coffee brewing device according to an embodiment of the present invention in different states;

[0047] FIG13 is an exploded view of the second plunger assembly of the drip coffee brewing device according to an embodiment of the present invention;

[0048] FIG14 is a schematic diagram of the water circuit of the drip coffee machine according to an embodiment of the present invention.

[0049] Description of reference numerals:

[0050] 100-main support; 110-brewing cavity; 120-first opening; 130-second opening; 140-second limiting groove;

[0051] 200 - first plunger assembly; 210 - first bracket; 211 - first chute; 212 - first column cavity; 220 - second bracket; 221 - bracket arm; 222 - connecting beam; 223 - second chute; 224 - spur rack; 225 - first limiting groove; 230 - first plunger; 231 - first slider; 241 - first elastic pin; 242 - second elastic pin; 250 - scraping component; 260 - conveying mechanism; 261 - first connector; 262 - first three-way valve;

[0052] 300 - first driving mechanism; 310 - first motor; 320 - first transmission gear; 330 - first driving gear;

[0053] 400 - second plunger assembly; 410 - second plunger; 411 - connecting column; 412 - stopper; 413 - second joint; 420 - screw rod; 421 - cylinder; 422 - inner flange; 423 - notch; 424 - stop member; 430 - nut; 431 - outer gear ring; 440 - filter screen;

[0054] 500 - second driving mechanism; 510 - second motor; 520 - second driving gear; 530 - second transmission gear;

[0055] 600-coffee;

[0056] 701-water pump; 702-first three-way connector; 703-heater; 704-air pump; 705-second three-way valve; 706-third three-way valve; 707-safety valve; 708-second three-way connector. Best Mode for Carrying Out the Invention

[0057] In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific implementation methods.

[0058] The present invention provides a drip coffee brewing device that can be used in coffee machines or beverage machines, etc. Referring to Figures 1 to 4 , the brewing device of the present invention includes a main frame 100, a conveying mechanism 260, a first plunger assembly 200, and a first driving mechanism 300.

[0059] The main support 100 is provided with a brewing cavity 110, and the brewing cavity 110 has a first opening 120 at one end in the first direction. Optionally, the support and the brewing cavity 110 may be an integrated structure or a split structure. For example, the brewing cavity 110 may be cylindrical, and the cylindrical brewing cavity 110 may be fixed to the support. The brewing cavity 110 may be provided with a first opening 120 and a second opening 130 at both ends in the first direction, respectively. Optionally, the first direction may be the opening direction of the first opening 120, or the axial direction of the brewing cavity 110.

[0060] The delivery mechanism 260 can be in communication with the brewing cavity 110 and pass gas into the brewing cavity 110. Optionally, the delivery mechanism 260 can also be configured to pass both gas and water into the brewing cavity 110, so as to achieve reuse of the delivery mechanism 260.

[0061] The first plunger assembly 200 is movably disposed on the main support 100 along a second direction perpendicular to the first direction. When the first plunger assembly 200 moves to one end of its stroke, it can block the first opening 120 to seal the brewing chamber 110. When the first plunger assembly 200 moves to the other end of its stroke, it can open the first opening 120 to allow coffee powder to be added to the brewing chamber 110 or to allow coffee grounds in the brewing chamber 110 to be discharged.

[0062] The first drive mechanism 300 is in transmission connection with the first plunger assembly 200 and is capable of driving the first plunger assembly 200 to reciprocate within its travel range. Specifically, before coffee powder is loaded, the first drive mechanism 300 can drive the first plunger assembly 200 to the other end of its travel range, opening the first opening 120, allowing the coffee machine's coffee powder loading mechanism to load coffee powder into the brewing chamber 110. After coffee powder loading is completed, the first drive mechanism 300 can drive the first plunger assembly 200 to one end of its travel range, closing the first opening 120 and sealing the brewing chamber 110. High-temperature water can be sprayed into the brewing chamber 110 via the conveying mechanism 260. Alternatively, other components can be used to spray high-temperature water into the brewing chamber 110. Subsequently, gas is introduced into the brewing chamber 110 via the conveying mechanism 260 to increase the air pressure within the brewing chamber 110. For example, the pressure in the brewing chamber 110 can be increased by 0.6 to 0.7 bar. This can increase the brewing speed of drip coffee, while maintaining the same taste and strength as conventional drip coffee. After drip coffee is completed, air can be introduced into the brewing chamber 110 via the conveying mechanism 260 to accelerate the discharge of waste liquid and dry the coffee grounds, facilitating their removal.

[0063] In the drip coffee brewing device of the embodiment of the present invention, when the first plunger assembly 200 moves to one end of its travel, it can block the first opening 120 of the brewing chamber 110, thereby sealing the brewing chamber 110. During the coffee brewing process, gas can be introduced into the brewing chamber 110 via the conveying mechanism 260 to appropriately increase the air pressure within the sealed brewing chamber 110. This can significantly increase the brewing speed of the drip coffee while ensuring the taste and concentration of the coffee. After the coffee is brewed, gas can also be introduced into the brewing chamber 110 via the conveying mechanism 260 to accelerate the discharge of waste liquid and dry the coffee grounds, facilitating their cleaning.

[0064] As shown in Figures 3 and 5, in some embodiments, the first plunger assembly 200 includes a first bracket 210, a second bracket 220, and a first plunger 230. The first bracket 210 can be movably arranged on the main bracket 100 along the second direction. The first plunger 230 can be movably arranged on the first bracket 210 along the first direction. Optionally, a slide groove can be provided on the main bracket 100, and a slide rail can be provided on the first bracket 210, and the slide rail can be slidably connected to the slide groove. For example, the main bracket 100 can be provided with connecting plates arranged opposite to each other, and the inner sides of the two connecting plates can be respectively provided with slide grooves, and the two opposite outer sides of the first bracket 210 can be respectively provided with slide rails, and the slide rails can be slidably connected to the corresponding slide grooves. It can be understood that the first bracket 210 can be movably connected to the main bracket 100 in a variety of ways, and is not limited to the above-mentioned connection methods.

[0065] The second bracket 220 is movably disposed on the first bracket 210 along the second direction. Optionally, another rail extending along the second direction may be disposed on the outer surface of the first bracket 210, and another slide groove corresponding to the rail may be disposed on the second bracket 220. The rail can be connected to the slide groove, thereby slidingly connecting the second bracket 220 to the first bracket 210. The second bracket 220 is respectively connected to the first drive mechanism 300 and the first plunger 230. That is, the first drive mechanism 300 is connected to the first plunger 230 through the second bracket 220.

[0066] The second bracket 220 moves relative to the first bracket 210 in the second direction, which can drive the first plunger 230 to move in the first direction to block or open the first opening 120. The second bracket 220 and the first bracket 210 move synchronously in the second direction, which can drive the first plunger 230 to move away from or back to the first opening 120.

[0067] In this way, the first driving mechanism 300 only needs to drive the second bracket 220 to move back and forth along the second direction, which can drive the first plunger 230 to move along the first direction to block or open the first opening 120, and can also drive the first plunger 230 to move away from the first opening 120, opening the first opening 120 to facilitate powder loading or slag discharge, or move back to the first opening 120 so that the first plunger 230 can re-block the first opening 120. The movement process is simple, which is conducive to simplifying the transmission structure.

[0068] In some embodiments, the first bracket 210 is provided with a first slide groove 211 extending along the first direction. The second bracket 220 is provided with a second slide groove 223, which extends obliquely along a third direction between the first and second directions and overlaps with the first slide groove 211. The first plunger 230 is provided with a first slider 231, which is slidably connected to the overlapping area of ​​the first slide groove 211 and the second slide groove 223.

[0069] When the first bracket 210 and the second bracket 220 are relatively displaced along the second direction, the overlapping position of the first slide groove 211 and the second slide groove 223 changes along the first direction, converting the movement of the second bracket 220 along the second direction into the movement of the first plunger 230 along the first direction, thereby covering the first opening 120 or opening the first opening 120.

[0070] The movement of the second bracket 220 along the second direction is converted into the movement of the first plunger 230 along the first direction through the structure of the matching groove and the slider. It is not only simple in structure and ingenious in design, but also helps to improve the structural compactness of the first plunger assembly 200 and help to reduce its size.

[0071] Alternatively, an X-axis can be set along the first direction, and a Y-axis can be set along the second direction. The direction in which the first plunger 230 moves away from the first opening 120 is set as the positive direction of the X-axis, and the direction in which the second bracket 220 moves toward the first opening 120 is set as the positive direction of the Y-axis, thereby forming a rectangular coordinate system. In this manner, the second slide groove 223 can extend along a predetermined angular range between the positive direction of the X-axis and the positive direction of the Y-axis. When the second bracket 220 moves away from the first opening 120, it can drive the first plunger 230 to disengage from the first opening 120.

[0072] Optionally, the bottom end of the second chute 223 may further extend in the negative direction of the Y-axis to form a horizontal extension. When the first plunger 230 seals the first opening 120 of the brewing chamber 110, the first slider 231 may be located in this horizontal extension. During the brewing process, even if the pressure in the brewing chamber 110 is high and an upward force is applied to the first plunger 230, the stop of this horizontal extension can limit the upward movement of the first plunger 230, thereby maintaining the sealing state of the first opening 120.

[0073] As shown in FIG3 , in some embodiments, the first bracket 210 defines a first columnar cavity 212 extending along a first direction. A first sliding groove 211 extends through the wall of the first columnar cavity 212. The second bracket 220 is disposed externally to the first bracket 210. The first plunger 230 is movably disposed within the first columnar cavity 212. The first slider 231 extends through the first sliding groove 211 and into the second sliding groove 223. This simplifies the structure and improves the stability of the first plunger 230.

[0074] It is understandable that the first plunger 230 may also be movably connected to the first bracket 210 via other structures. For example, the first plunger 230 may be connected to the first bracket 210 via a structure in which a sliding groove and a slider cooperate with each other.

[0075] Optionally, first slots 211 are respectively provided on two opposing walls of the first column cavity 212. The second bracket 220 includes two parallel bracket arms 221 and a connecting beam 222 connecting the two bracket arms 221. The two bracket arms 221 are located on opposite sides of the first bracket 210, and each bracket arm 221 is provided with a second slot 223, which overlaps with the corresponding first slot 211. First sliders 231 are respectively provided on opposite sides of the first plunger 230, and the first sliders 231 pass through the overlapping area of ​​the corresponding first slot 211 and second slot 223. In this way, the first plunger 230 is subjected to balanced force, which helps further improve the movement stability of the first plunger 230. Optionally, the connecting beam 222 can be connected to one end of the two bracket arms 221. The second bracket 220 is generally U-shaped to prevent the connecting beam 222 from interfering with the first bracket 210.

[0076] Optionally, multiple second slide grooves 223 may be provided on each support arm 221. For example, two second slide grooves 223 may be provided sequentially along the second direction. Correspondingly, two first sliders 231 may be provided on each side of the first plunger 230. This further improves the stability of the first plunger 230.

[0077] In some embodiments, a spur rack 224 may be provided on the second bracket 220, and the first driving mechanism 300 includes a first transmission gear 320 and a first motor 310 drivingly connected to the first transmission gear 320. The first transmission gear 320 meshes with the spur rack 224. The rack and pinion mechanism is not only simple in structure and low in cost, but also highly stable.

[0078] Optionally, a spur rack 224 extending along the second direction is provided on the support arm 221. The first driving mechanism 300 includes two first transmission gears 320 and a first motor 310 connected to the first transmission gears 320. The first transmission gears 320 mesh with the spur rack 224.

[0079] Optionally, the support arm 221 and the spur rack 224 may be integrally formed. For example, the spur rack 224 may be formed on the side edge of the support arm 221 through an integral molding process. Optionally, the two first transmission gears 320 may be fixedly connected by a shaft to ensure the coaxiality of the two first transmission shafts.

[0080] Optionally, the first drive mechanism 300 may further include a first drive gear 330. The first drive gear 330 may be disposed on the rotating shaft of the first motor 310 and may mesh with the first transmission gear 320. Of course, in a specific implementation, depending on the required transmission ratio, the first motor 310 may also be connected to the first transmission gear 320 via a gear set.

[0081] In some embodiments, the transmission mechanism 260 may be disposed on the first plunger assembly 200. For example, the transmission mechanism 260 may be disposed on the first plunger 230. Optionally, the transmission mechanism 260 may include a first connector 261 and a first three-way valve 262. When used in a coffee machine, the first connector 261 may be connected to the air supply system and water supply system of the coffee machine through the first three-way valve 262.

[0082] In some embodiments, the first plunger assembly 200 further includes a locking mechanism having a locked state that restricts relative displacement between the first bracket 210 and the second bracket 220, and an unlocked state that allows relative displacement between the first bracket 210 and the second bracket 220. The second bracket 220 has a first stroke that is close to the first opening 120 and a second stroke that is away from the first opening 120.

[0083] Optionally, the first and second travels may be measured based on the overall movement trajectory of the second bracket 220, or may be measured based on the movement trajectory of any point on the second bracket 220. For example, when measuring based on one end of the second bracket 220, the travel of the one end of the second bracket 220 between point A in FIG6 and point B in FIG7 may be regarded as the second travel, and the travel of the second bracket 220 between point B in FIG7 and point C in FIG8 may be regarded as the first travel.

[0084] When the second bracket 220 is in the first stroke, the locking mechanism is in the unlocked state, and the first bracket 210 and the second bracket 220 can be displaced relative to each other, changing the overlapping position of the first slide groove 211 and the second slide groove 223, driving the first plunger 230 to move along the first direction to block or open the first opening 120.

[0085] When the second bracket 220 is in the second stroke, the locking mechanism is in a locked state, limiting the relative displacement of the first bracket 210 and the second bracket 220, and the second bracket 220 can drive the first bracket 210 and the first plunger 230 to move away from the first opening 120 or move back to the first opening 120.

[0086] By providing a locking mechanism, it is possible to ensure that the first plunger 230 moves in the first direction when it is opposite to the first opening 120, thereby avoiding interference between the first plunger 230 and the main bracket 100 due to the first plunger 230 moving in the first direction when it is not opposite to the first opening 120, and it is also possible to avoid that one side of the first plunger 230 is scratched or squeezed against the wall of the brewing chamber.

[0087] In some embodiments, the locking mechanism includes a first elastic pin 241, which is retractably disposed on one of the first bracket 210 and the second bracket 220. The other of the first bracket 210 and the second bracket 220 is provided with a first limiting slot 225. The first elastic pin 241 can extend into the first limiting slot 225 to limit relative displacement between the first bracket 210 and the second bracket 220, and can also be disengaged from the first limiting slot 225 to allow relative displacement between the first bracket 210 and the second bracket 220.

[0088] Specifically, when the second bracket 220 moves along the first stroke, the first elastic pin 241 is disengaged from the first limiting groove 225, as shown in Figure 8. The second bracket 220 can move relative to the first bracket 210 to drive the first plunger 230 to open the first opening 120 or cover the first opening 120.

[0089] When the second bracket 220 moves along the second stroke, the first elastic pin 241 is in a state of extending into the first limiting groove 225, as shown in Figures 6 and 7. The second bracket 220 can drive the first bracket 210 and the first plunger 230 to move synchronously along the second direction, thereby driving the first bracket 210 and the first plunger 230 to move away from the first opening 120 to provide a space for adding powder or discharging residue from the brewing chamber 110, or driving the first bracket 210 and the first plunger 230 to move back to a position opposite to the first opening 120, so that the first plunger 230 can cover the first opening 120 to complete the coffee 600 brewing operation.

[0090] In some embodiments, the locking mechanism further includes a second elastic pin 242, which is telescopically disposed on one of the main bracket 100 and the first bracket 210, wherein a second limiting slot 140 is disposed on one of the main bracket 100 and the first bracket 210. The second elastic pin 242 is configured to extend into the second limiting slot 140 when the second bracket 220 is in the first stroke to limit the follow-up movement of the first bracket 210, and to disengage from the second limiting slot 140 when the second bracket 220 is in the second stroke to allow the first bracket 210 to follow the movement.

[0091] In this way, when the second bracket 220 drives the first plunger 230 to move in the first direction, the first bracket 210 and the first plunger 230 can be prevented from deviating in the second direction, thereby preventing the brewing chamber wall from squeezing a certain side of the first plunger 230. For example, preventing the brewing chamber wall from squeezing the sealing ring on the first plunger 230 is beneficial to maintaining the sealing performance of the first plunger 230.

[0092] Taking the second elastic pin 242 disposed on the first bracket 210 and the second limiting slot 140 disposed on the main bracket 100 as an example, when the second bracket 220 moves between position B in FIG. 7 and position C in FIG. 8 , the second elastic pin 242 extends into the second limiting slot 140, restricting the follow-up movement of the first bracket 210. When the second bracket 220 moves between position A in FIG. 6 and position B in FIG. 7 , the second elastic pin 242 is disengaged from the second limiting slot 140, and the first bracket 210 and the second bracket 220 can maintain synchronous movement under the action of the first elastic pin 241.

[0093] In some embodiments, the first plunger assembly 200 further includes a scraping member 250, which is disposed on the first bracket 210. As the first bracket 210 moves back to a position opposite the first opening 120, the scraping member 250 can scrape away coffee grounds that have been pushed outside the first opening 120. This allows the motion mechanism comprised of the first bracket 210, the second bracket 220, and the first drive mechanism 300 to be reused to drive the scraping member 250 to complete the scraping operation, eliminating the need for a separate motion mechanism for the scraping member 250. This ingenious structural design further simplifies the structure of the drip coffee brewing device.

[0094] Optionally, the scraping member 250 may be disposed at one end of the first bracket 210 in the second direction. For example, the scraping member 250 may be disposed at one end of the first bracket 210 in the positive direction of the Y axis. Optionally, the scraping member 250 may be C-shaped to prevent coffee grounds from overflowing to the sides.

[0095] As shown in Figures 1, 2, and 4, in some embodiments, the brewing chamber 110 has a second opening 130 at the other end in the first direction. The drip coffee brewing device further includes a second plunger assembly 400 and a second drive mechanism 500. The drip coffee brewing device further includes a second plunger assembly 400 and a second drive mechanism 500. The second plunger assembly 400 extends into the brewing chamber 110 through the first opening 120; the second drive mechanism 500 is in transmission connection with the second plunger assembly 400 and is used to drive the second plunger assembly 400 to move in the first direction to push the coffee grounds out of the first opening 120.

[0096] Optionally, the second plunger assembly 400 includes a second plunger 410, a screw rod 420, and a nut 430. The second plunger 410 is movably disposed in the brewing chamber 110 along the first direction. The nut 430 is rotatably disposed at the second opening 130, and the screw hole of the nut 430 is opposite to the second opening 130. The screw rod 420 is threadedly connected to the nut 430, and one end of the screw rod 420 extends into the brewing chamber 110 through the second opening 130 and is connected to the second plunger 410. The second driving mechanism 500 includes a second motor 510, which is transmission-connected to the nut 430. The second plunger 410 can complete the powder pressing and slag discharge operations.

[0097] Optionally, an outer ring gear 431 may be provided on the outer periphery of the nut 430, and the second driving mechanism 500 may further include a second driving gear 520 and a second transmission gear 530. The second driving gear 520 may be provided on the rotating shaft of the second motor 510, and the second driving gear 520 may be engaged with the second transmission gear 530. The second transmission gear 530 may be engaged with the outer ring gear 431 to drive the nut 430 to rotate and drive the screw rod 420 and the second plunger 410 to move along the first direction.

[0098] Optionally, a second connector 413 may be provided in the second plunger 410 , and the second connector 413 is used to connect to a pipe for outputting coffee liquid. A filter 440 may be provided at one end of the second plunger 410 near the first opening 120 .

[0099] As shown in FIG13 , in some embodiments, a connecting post 411 is protruded from one end of the second plunger 410 near the screw rod 420. One or more stoppers 412 are protruded from the outer circumference of the connecting post 411. When multiple stoppers 412 are provided on the connecting post 411, the stoppers 412 are sequentially spaced along the circumference of the connecting post 411. The screw rod 420 includes a barrel 421, the outer circumference of which is provided with an external thread structure. The insertion end of the barrel 421 extends inwardly to form an inner flange 422. The inner flange 422 has a notch 423 that corresponds to the stopper 412 and is used to avoid the stopper 412. For example, two stoppers 412 can be symmetrically provided on the outer circumference of the connecting post 411, and correspondingly, two notches 423 can be symmetrically provided on the inner flange 422.

[0100] During installation, align the stop block 412 with the notch 423, and insert the connecting column 411 into the cylinder 421 from the insertion end of the cylinder 421. The stop block 412 can move into the cylinder 421 through the notch 423. Then, rotate the connecting column 411 so that the stop block 412 and the notch 423 are offset from each other. The stop block 412 can prevent the connecting column 411 from coming out of the cylinder 421. During disassembly, rotate the connecting column 411 in the opposite direction so that the stop block 412 is aligned with the notch 423, and pull out the connecting column 411. In this way, the second plunger 410 and the screw rod 420 are not only firmly connected, but also easy to disassemble, making it convenient to clean or maintain the second plunger 410 and the screw rod 420.

[0101] Optionally, the protruding end of the cylinder 421 is detachably connected to a stop component 424. When the stop component 424 is connected to the cylinder 421, the stop component 424 can stop the main bracket 100 to limit the screw rod 420 from driving the second plunger 410 to extend from the first opening 120. When the stop component 424 is removed from the cylinder 421, the screw rod 420 can drive the second plunger 410 to extend from the first opening 120.

[0102] In normal use, the stopper 424 can be installed at the protruding end of the cylinder 421. The stopper 424 can stop the main bracket 100, thereby limiting the second plunger 410 from extending from the first opening 120, as shown in FIG11 . When the second plunger 410 needs to be removed, the stopper 424 can be removed from the cylinder 421. The nut 430 can drive the screw rod 420 to continue moving in the extension direction by a stroke corresponding to the size of the stopper 424, driving the second plunger 410 to extend from the first opening 120, making it convenient for the user to remove the second plunger 410 from the cylinder 421, as shown in FIG12 .

[0103] Alternatively, the stopper member 424 may be semicircular, as shown in Figure 4. The protruding end of the barrel 421 may extend radially outward to form an outer flange, and the semicircular support member may be snap-fitted onto the outer side of the barrel 421, positioned between the external thread structure and the outer flange. This allows the stopper member 424 to be securely attached to the barrel 421, preventing it from falling off during use and preventing it from taking up space.

[0104] The specific structure and movement process of the drip coffee brewing device according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0105] 1) The initial state can be as shown in Figures 5 and 6 , with the first bracket 210, the second bracket 220, and the first plunger 230 avoiding the first opening 120, and the first opening 120 being open. The first elastic pin 241 can be embedded in the first limiting groove 225. The first and second chute 211 and 223 overlap at the end of the first chute 211 away from the first opening 120, allowing a certain gap between the first plunger 230 and the end surface of the brewing chamber 110. The second plunger 410 can be located near the second opening 130.

[0106] 2) Coffee 600 may be added into the brewing chamber 110 through the first opening 120 by, for example, a grinding mechanism or a powder loading mechanism, as shown in FIG6 .

[0107] 3) The first drive mechanism 300 drives the second bracket 220 to move in the positive direction of the Y-axis, as shown in Figures 6 and 7. Since the second bracket 220 is in the second stroke, the first elastic pin 241 is embedded in the first limiting groove 225. The second bracket 220 can drive the first bracket 210 and the first pin to move synchronously back to a position opposite the first opening 120, as shown in Figure 7. In the state shown in Figure 7, the second bracket 220 has actually moved to the intersection of the second stroke and the first stroke, and the second elastic pin 242 is aligned and embedded in the second limiting groove 140.

[0108] 4) The first driving mechanism 300 continues to drive the second bracket 220 to move in the positive direction of the Y axis. Under the limitation of the second elastic pin 242, the first bracket 210 no longer moves. The second bracket 220 overcomes the elastic force of the first elastic pin 241, so that the first elastic pin 241 escapes from the first limiting groove 225. The overlapping area of ​​the first chute 211 and the second chute 223 moves toward the end of the first chute 211 close to the first opening 120, and drives the first pin to extend into the brewing cavity 110 through the first opening 120, as shown in Figures 7 and 8. At this time, water can be supplied to the brewing cavity 110 through the conveying mechanism 260, and then gas can be introduced into the brewing cavity 110 through the conveying mechanism 260 to increase the air pressure in the brewing cavity 110 by 0.6 bar to 0.7 bar, so as to increase the dripping speed. After the drip filtration is completed, gas can be introduced into the brewing cavity 110 again through the conveying mechanism 260 to accelerate the discharge of waste liquid and dry and compact the coffee grounds.

[0109] 5) After the waste liquid is discharged, the second bracket 220 can be driven to move in the negative direction of the Y-axis by the first driving mechanism 300. When the second bracket 220 is in the first stroke, the second elastic pin 242 extends into the second limiting groove 140, and the first bracket 210 does not move with it. The first slide groove 211 and the second slide groove 223 drive the first plunger 230 to move in the positive direction of the X-axis, opening the first opening 120 and disengaging. When the second bracket 220 moves to the junction of the first stroke and the second stroke, the first elastic pin 241 is embedded in the first limiting groove 225. When the second bracket 220 continues to move in the negative direction of the Y-axis, the second elastic pin 242 disengages from the second limiting groove 140, and the first bracket 210 and the first pin move with it and move to completely avoid the first opening 120, as shown in Figure 9.

[0110] 6) The second driving mechanism 500 drives the second plunger 410 to move along the positive direction of the X axis, pushing the coffee 600 in the brewing cavity 110 out of the first opening 120, as shown in FIG. 10 .

[0111] 7) The first driving mechanism 300 drives the first bracket 210 back to a position opposite the first opening 120. Simultaneously, the first bracket 210 drives the scraping component 250 to move along the positive direction of the Y axis to scrape off the coffee 600 at the first opening 120, as shown in FIG11 .

[0112] 8) The first drive mechanism 300 can be used to drive the first bracket 210, the second bracket 220 and the first plunger 230 to return to the initial state shown in FIG. 5 .

[0113] In some embodiments, the drip coffee brewing device may further include a mid-stop sensor configured to trigger the first driving mechanism 300 to stop the first plunger assembly 200 upon sensing that the first plunger assembly 200 is in a mid-stop position. When the first plunger assembly 200 is in the mid-stop position, the conveying mechanism 260 of the first plunger assembly 200 moves to above the brewing chamber 110 and can inject brewing liquid into the brewing chamber 110, and the first plunger assembly 200 has not yet closed the first opening 120.

[0114] Optionally, the mid-stop sensing component may include a Hall sensor and two magnets. The Hall sensor may be provided on the main bracket 100, and the two magnets may be installed at the junction of the straight rack 224 and the connecting beam 222. During the process of the first plunger assembly 100 blocking the first opening 120 of the brewing cavity 110, when a magnet approaches the Hall sensor, the Hall sensor may generate a first sensing signal, triggering the first motor 310 to decelerate. When another magnet approaches the Hall sensor, the Hall sensor may generate a second sensing signal, triggering the first motor 310 to brake and stop. At this time, the first plunger assembly 200 is exactly in the mid-stop position. The first plunger assembly 200 is opposite to the first opening 120, but does not block the first opening 120. The conveying mechanism 260 on the first plunger assembly 200 is located above the first opening 120 and can inject brewing liquid into the brewing cavity 110. In this way, hot water is injected into the brewing chamber while the air in the chamber is discharged from around the first opening 120 that is not completely sealed, which can prevent the air in the chamber from automatically compressing and generating pressure, resulting in the speed and concentration of the drip coffee being out of control.

[0115] As shown in FIG14 , an embodiment of the present invention further provides a drip coffee machine, comprising an air supply system and a drip coffee brewing device as described in any of the above embodiments. The air supply system is connected to a delivery mechanism 260 of the drip coffee brewing device and is configured to supply air to the delivery mechanism 260. Because the drip coffee brewing device has the advantages of fast dripping speed and ease of cleaning, a drip coffee machine using the drip coffee brewing device also has the above advantages.

[0116] Optionally, the drip coffee machine may further include a water supply system, a grinding device, a grounds container, and a liquid discharge system. The grinding device can be used to load coffee grounds into the brewing chamber 110 via the first opening 120. The water supply system can be connected to the delivery mechanism 260 on the first plunger 230, and water can be supplied to the brewing chamber 110 via the delivery mechanism 260 to brew coffee. The brewed coffee liquid can be delivered to a coffee cup or coffee pot via the liquid discharge system. The grounds container is used to hold the coffee grounds.

[0117] Optionally, the water supply system may include a water pump 701, a first three-way joint 702, and a heater 703. The water pump 701 may be connected to the heater 703 via the first three-way joint 702. The air supply system may include an air pump 704. The first joint 261 may be connected to the heater 703 and the air pump 704, respectively, via the first three-way valve 262. The heater 703 may supply hot water to the first joint 262 via the first three-way valve 262. The air pump 704 may supply air to the first joint 262 via the first three-way valve 262.

[0118] Optionally, the drip coffee machine may further include a second three-way valve 705, a third three-way valve 706, a safety valve 707, and a second three-way connector 708. The first three-way connector 702 may be connected to the second three-way connector 708 via the safety valve 707. The second connector 413 of the second plunger assembly 400 may be connected to the second three-way valve 705. The second three-way valve 705 may be connected to the second three-way connector 708 and the third three-way valve 706, respectively. The second three-way valve 705 may deliver coffee liquid through the third three-way valve 706, and the second three-way valve 705 may discharge gas or cleaning liquid through the second three-way connector 708.

[0119] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present invention.

Claims

1. A drip coffee brewing device, characterized in that: include: A main support (100) is provided with a brewing cavity (110), wherein one end of the brewing cavity (110) in a first direction has a first opening (120); A conveying mechanism (260) capable of being in communication with the brewing cavity (110) and introducing gas into the brewing cavity (110); A first plunger assembly (200) is movably arranged on the main support (100) along a second direction perpendicular to the first direction; when the first plunger assembly (200) moves to one end of its stroke, it is capable of blocking the first opening (120); when the first plunger assembly (200) moves to the other end of its stroke, it is capable of opening the first opening (120); The first driving mechanism (300) is drivingly connected to the first plunger assembly (200), and the first driving mechanism (300) is used to drive the first plunger assembly (200) to reciprocate within its own stroke.

2. The drip coffee brewing device according to claim 1, characterized in that: The conveying mechanism (260) is arranged on the first plunger assembly (200).

3. The drip coffee brewing device according to claim 1, characterized in that: The first plunger assembly (200) comprises: A first bracket (210) is movably arranged on the main bracket (100) along the second direction; A first plunger (230) is movably disposed on the first bracket (210) along the first direction; a second bracket (220) movably disposed on the first bracket (210) along the second direction, and the second bracket (220) is respectively drivingly connected to the first driving mechanism (300) and the first plunger (230); The second bracket (220) moves relative to the first bracket (210) in the second direction, thereby driving the first plunger (230) to move in the first direction, so as to block or open the first opening (120); the second bracket (220) and the first bracket (210) move synchronously in the second direction, thereby driving the first plunger (230) to move synchronously, so as to move away from the first opening (120) or move back to the first opening (120).

4. The drip coffee brewing device according to claim 3, characterized in that: The first bracket (210) is provided with a first sliding groove (211) extending along the first direction; A second slide groove (223) is provided on the second bracket (220), and the second slide groove (223) extends obliquely along a third direction between the first direction and the second direction and overlaps with the first slide groove (211); A first sliding block (231) is provided on the first plunger (230), and the first sliding block (231) is slidably connected to an overlapping area of ​​the first sliding groove (211) and the second sliding groove (223).

5. The drip coffee brewing device according to claim 4, characterized in that: The first support (210) has a first column cavity (212) arranged along a first direction, and a first sliding groove (211) penetrating the cavity wall of the first column cavity (212); The second bracket (220) is arranged outside the first bracket (210); The first plunger (230) is movably disposed in the first column cavity (212), and the first sliding block (231) passes through the first sliding groove (211) and extends into the second sliding groove (223).

6. The drip coffee brewing device according to claim 3, characterized in that: The second bracket (220) is provided with a spur rack (224), the first driving mechanism (300) comprises a first transmission gear (320) and a first motor (310) transmission-connected to the first transmission gear (320), and the first transmission gear (320) is meshed with the spur rack (224).

7. The drip coffee brewing device according to claim 3, characterized in that: The first plunger assembly (200) further comprises a locking mechanism, the locking mechanism having a locking state for limiting relative displacement of the first bracket (210) and the second bracket (220) and an unlocking state for allowing relative displacement of the first bracket (210) and the second bracket (220); The second bracket (220) has a first stroke close to the first opening (120) and a second stroke away from the first opening (120); when the second bracket (220) is in the first stroke, the locking mechanism is in an unlocked state; when the second bracket (220) is in the second stroke, the locking mechanism is in a locked state.

8. The drip coffee brewing device according to claim 7, characterized in that: The locking mechanism comprises a first elastic pin (241), the first elastic pin (241) being telescopically arranged on one of the first bracket (210) and the second bracket (220), and the other of the first bracket (210) and the second bracket (220) being provided with a first limiting groove (225); The first elastic pin (241) can extend into the first limiting groove (225) to limit the relative displacement of the first bracket (210) and the second bracket (220), and can also be released from the first limiting groove (225) to allow the first bracket (210) and the second bracket (220) to be relatively displaced.

9. The drip coffee brewing device according to claim 8, characterized in that: The locking mechanism further comprises a second elastic pin (242), the second elastic pin (242) being telescopically arranged on one of the main bracket (100) and the first bracket (210), and a second limiting groove (140) is provided on one of the main bracket (100) and the first bracket (210); The second elastic pin (242) is configured to extend into the second limiting slot (140) to limit the follow-up movement of the first bracket (210) when the second bracket (220) is in the first stroke, and to escape from the second limiting slot (140) to allow the first bracket (210) to follow-up movement when the second bracket (220) is in the second stroke.

10. The drip coffee brewing device according to claim 3, characterized in that: The first plunger assembly (200) further comprises a scraping component (250), wherein the scraping component (250) is arranged on the first bracket (210), and when the first bracket (210) moves back to a position opposite to the first opening (120), the scraping component (250) is capable of scraping off coffee grounds that have been pushed out of the first opening (120).

11. The drip coffee brewing device according to claim 10, characterized in that: The other end of the brewing cavity (110) in the first direction has a second opening (130); The brewing device further comprises a second plunger assembly (400) and a second driving mechanism (500); the second plunger assembly (400) extends into the brewing cavity (110) via the first opening (120); the second driving mechanism (500) is transmission-connected to the second plunger assembly (400) and is used to drive the second plunger assembly (400) to move along the first direction so as to push the coffee grounds out of the first opening (120).

12. The drip coffee brewing device according to claim 11, characterized in that: The second plunger assembly (400) comprises: a nut (430) rotatably disposed at the second opening (130) and having an axis extending along the first direction, the nut (430) being drivingly connected to the second driving mechanism (500); A screw rod (420) is threadedly connected to the nut (430), and one end of the screw rod (420) extends into the brewing cavity (110) through the second opening (130); A second plunger (410) detachably connected to the insertion end of the screw rod (420); A stop component (424) is detachably connected to the other end of the screw rod (420), and the stop component (424) is used to adjust the stroke of the screw rod (420) to limit the screw rod (420) from driving the second plunger (410) to extend from the first opening (120), or to allow the screw rod (420) to drive the second plunger (410) to extend from the first opening (120).

13. The drip coffee brewing device according to claim 2, characterized in that: It also includes a mid-stop sensing component, which is used to trigger the first driving mechanism (300) to stop the first plunger assembly (200) when sensing that the first plunger assembly (200) is located at a mid-stop position; When the first plunger assembly (200) is located at the middle stop position, the conveying mechanism (260) of the first plunger assembly (200) moves to the top of the brewing cavity (110) and can inject brewing liquid into the brewing cavity (110), and the first plunger assembly (200) has not yet closed the first opening (120).

14. A drip coffee machine, characterized in that: It comprises an air supply system and a drip coffee brewing device as claimed in any one of claims 1 to 13, wherein the air supply system is connected to the conveying mechanism (260).

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