Drip filter coffee brewing device and drip filter coffee maker

Abstract

The application provides a drip coffee brewing device and a drip coffee machine, which comprises a main support, a conveying mechanism, a first plunger assembly and a first driving mechanism; the main support is provided with a brewing cavity; the conveying mechanism can be communicated with the brewing cavity and can pass gas into the brewing cavity; the first plunger assembly is movably arranged on the main support along a second direction perpendicular to a first direction; the first plunger assembly can block a first opening when moving to one end of its stroke and can open the first opening when moving to the other end of its stroke; the first driving mechanism is in transmission connection with the first plunger assembly, and the first driving mechanism is used for driving the first plunger assembly to reciprocate in its stroke. The drip coffee brewing device not only has a faster drip speed but also is easy to clean.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drip coffee machine, and in particular to a drip coffee brewing device and a drip coffee machine. BACKGROUND

[0002] With the development of coffee machine related technology, the pressure type coffee machine has basically realized the automatic operation of grinding, powder loading, brewing, residue discharging and cleaning. For example, a full-automatic electric coffee machine disclosed in a Chinese patent with the publication number CN102791171B is composed of a shell, a water tank, a water pump, a brewing group, a control element, an electrical control unit and a collection container for coffee residue or coffee residue, and has a coffee bean container and a grinder.

[0003] However, due to the difference in drip coffee brewing method, most conventional drip coffee machines can only realize the automation of grinding and dripping, and cannot realize the full-process automation of grinding, dripping, residue discharging and cleaning. There is also a problem of slow dripping speed and long production time. SUMMARY

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

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

[0006] a main support provided with a brewing cavity, the brewing cavity having a first opening at one end in a first direction;

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

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

[0009] a first driving mechanism in transmission connection with the first plunger assembly, the first driving mechanism being used for driving the first plunger assembly to reciprocate within its stroke.

[0010] In some embodiments, the conveying mechanism is arranged on the first plunger assembly.

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

[0012] a first support movably arranged on the main support along the second direction;

[0013] a first plunger movably arranged on the first support along the first direction;

[0014] a second support movably arranged on the first support along the second direction, and the second support is in transmission connection with the first driving mechanism and the first plunger respectively;

[0015] Wherein, the movement of the second support relative to the first support along the second direction can drive the first plunger to move along the first direction to block or open the first opening; the synchronous movement of the second support and the first support along the second direction can drive the first plunger to move synchronously to move away from the first opening or move back to the first opening. In this way, the movement process is simple, which is conducive to simplifying the transmission structure.

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

[0017] The second support is provided with a second sliding groove, 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 sliding block, and the first sliding block is slidingly connected to the overlapping area of the first sliding groove and the second sliding groove. Not only the structure is simple and the design is ingenious, but also the compactness of the first plunger assembly is improved, which is conducive to reducing the size.

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

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

[0021] The first plunger is movably arranged in the first column cavity, and the first sliding block penetrates through the first sliding groove and extends into the second sliding groove. In this way, not only the structure is simple, but also the movement stability of the first plunger is improved.

[0022] In some embodiments, the second support is provided with a straight rack, the first driving mechanism includes a first transmission gear and a first motor in transmission connection with the first transmission gear, and the first transmission gear is in engagement with the straight rack. The gear and rack mechanism not only has simple structure and low cost, but also has high stability.

[0023] In some embodiments, the first plunger assembly further comprises a locking mechanism having a locked state restricting relative displacement of the first holder and the second holder and an unlocked state allowing relative displacement of the first holder and the second holder.

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

[0025] By providing the locking mechanism, it can be avoided that the first plunger interferes with the main holder when the first plunger moves in the first direction without being opposite to the first opening, and it can also be avoided that one side of the first plunger rubs or presses against the wall of the brewing chamber.

[0026] In some embodiments, the locking mechanism comprises a first elastic pin telescopically arranged on one of the first holder and the second holder, and a first limiting slot arranged on the other of the first holder and the second holder.

[0027] The first elastic pin can extend into the first limiting slot to restrict relative displacement of the first holder and the second holder, and can also be withdrawn from the first limiting slot to allow relative displacement of the first holder and the second holder.

[0028] In some embodiments, the locking mechanism further comprises a second elastic pin telescopically arranged on one of the main holder and the first holder, and a second limiting slot arranged on the other of the main holder and the first holder.

[0029] The second elastic pin is configured to extend into the second limiting slot to restrict follow-up of the first holder when the second holder is at the first stroke, and to be withdrawn from the second limiting slot to allow follow-up of the first holder when the second holder is at the second stroke.

[0030] In some embodiments, the first plunger assembly further comprises a slag scraping component arranged on the first holder, which can scrape off coffee slag that has been pushed out of the first opening during movement of the first holder back to a position opposite to the first opening.

[0031] In this way, the movement mechanism composed of the first holder, the second holder and the first driving mechanism can be reused to drive the slag scraping component to complete the slag scraping operation, and it is not necessary to separately provide a movement mechanism for the slag scraping component, which is a clever structural design and is conducive to further simplifying the structure of the brewing device.

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

[0033] The brewing device further comprises a second plunger assembly and a second driving mechanism, the second plunger assembly extends into the brewing chamber via the first opening; the second driving mechanism is in driving connection with the second plunger assembly for driving the second plunger assembly to move in the first direction to push the coffee residue out of the first opening.

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

[0035] a nut rotatably arranged at the second opening and having an axis extending in the first direction, the nut being in driving connection with the second driving mechanism;

[0036] a screw rod threadedly connected with the nut, and one end of the screw rod extending into the brewing chamber via the second opening;

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

[0038] a stopper detachably connected at the other end of the screw rod, the stopper being used to adjust the stroke of the screw rod to limit or allow the screw rod to drive the second plunger to extend out of the first opening.

[0039] In some embodiments, a middle-stop sensing member is further included, the middle-stop sensing member being used to trigger the first driving mechanism to stop the first plunger assembly when sensing that the first plunger assembly is at a middle-stop position;

[0040] When the first plunger assembly is at the middle-stop position, the delivery mechanism of the first plunger assembly is moved above the brewing chamber and can inject brewing liquid into the brewing chamber, and the first plunger assembly has not yet closed the first opening.

[0041] The second aspect of the present application provides a drip coffee maker, comprising a gas supply system and the drip coffee brewing device according to any one of the above, the gas supply system being connected with the delivery mechanism.

[0042] The drip filter type coffee brewing device of the embodiment of the present application can block the first opening of the brewing cavity when the first plunger assembly moves to one end of its stroke, so as to seal the brewing cavity. During the coffee brewing process, gas can be introduced into the brewing cavity through the conveying mechanism, so as to appropriately increase the air pressure in the sealed brewing cavity, and on the basis of ensuring the taste and concentration of coffee, the brewing speed of drip filter type coffee can be significantly improved. After the coffee brewing is completed, gas can also be introduced into the brewing cavity through the conveying mechanism, so as to accelerate the waste liquid discharge and dry the coffee residue, facilitating the cleaning of the coffee residue. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 and Figure 2 are respectively the perspective views of the drip filter type coffee brewing device of the embodiment of the present application from different viewing angles;

[0044] Figure 3 is the exploded view of a part of structure of the drip filter type coffee brewing device of the embodiment of the present application;

[0045] Figure 4 is the exploded view of another part of structure of the drip filter type coffee brewing device of the embodiment of the present application;

[0046] Figures 5 to 12 are respectively the sectional views of the drip filter type coffee brewing device of the embodiment of the present application in different states;

[0047] Figure 13 is the exploded view of the second plunger assembly of the drip filter type coffee brewing device of the embodiment of the present application;

[0048] Figure 14 is the water circuit principle diagram of the drip filter type coffee machine of the embodiment of the present application.

[0049] BRIEF DESCRIPTION OF DRAWINGS:

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

[0051] 200-first plunger assembly; 210-first support; 211-first sliding groove; 212-first column cavity; 220-second support; 221-support arm; 222-continuous beam; 223-second sliding groove; 224-straight rack; 225-first limiting groove; 230-first plunger; 231-first sliding block; 241-first elastic column pin; 242-second elastic column pin; 250-residue scraping part; 260-conveying mechanism; 261-first joint; 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 - limiting block; 413 - second joint; 420 - screw rod; 421 - cylinder; 422 - inner flange; 423 - notch; 424 - stop component; 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 joint; 703 - heater; 704 - air pump; 705 - second three-way valve; 706 - third three-way valve; 707 - safety valve; 708 - second three-way joint. DETAILED DESCRIPTION

[0057] In order for those skilled in the art to better understand the technical solutions of the embodiments of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments.

[0058] The present application provides a drip filter type coffee brewing device, which can be applied to a coffee machine or a beverage machine, etc. Referring to Figures 1 to 4 The brewing device of the present application comprises a main support 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 one end of the brewing cavity 110 in a first direction has a first opening 120. Optionally, the support and the brewing cavity 110 can be an integrated structure or a split structure. For example, the brewing cavity 110 can be in a cylindrical shape, and the cylindrical brewing cavity 110 can be fixed on the support. The two ends of the brewing cavity 110 in the first direction can be respectively provided with the first opening 120 and a second opening 130. Optionally, the first direction can be the opening direction of the first opening 120, or the axial direction of the brewing cavity 110.

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

[0061] The first plunger assembly 200 is movably arranged on the main support 100 along a second direction perpendicular to the first direction. The first plunger assembly 200 can block the first opening 120 when moving to one end of its stroke, so as to seal the brewing chamber 110. The first plunger assembly 200 can open the first opening 120 when moving to the other end of its stroke, so as to enable the coffee machine to fill coffee powder into the brewing chamber 110 or to discharge coffee residue in the brewing chamber 110.

[0062] The first driving mechanism 300 is in transmission connection with the first plunger assembly 200, and the first driving mechanism 300 can drive the first plunger assembly 200 to reciprocate within its stroke. Specifically, before filling coffee powder, the first driving mechanism 300 can drive the first plunger assembly 200 to move to the other end of its stroke, so as to open the first opening 120, and the coffee machine can fill coffee powder into the brewing chamber 110. After filling coffee powder, the first driving mechanism 300 can drive the first plunger assembly 200 to move to one end of its stroke, so as to block the first opening 120 and seal the brewing chamber 110. The delivery mechanism 260 can spray high-temperature water into the brewing chamber 110. Of course, other components can also be used to spray high-temperature water into the brewing chamber 110. Then, the delivery mechanism 260 can introduce gas into the brewing chamber 110, so as to increase the air pressure in the brewing chamber 110. For example, the air pressure in the brewing chamber 110 can be increased to 0.6-0.7 bar. In this way, the brewing speed of drip coffee can be increased, but the taste and concentration of the coffee are basically the same as those of conventional drip coffee. After brewing, the delivery mechanism 260 can also introduce gas into the brewing chamber 110, so as to accelerate the discharge of waste liquid, dry the coffee residue, and facilitate the cleaning of the coffee residue.

[0063] The drip coffee brewing device of the embodiment of the present application can block the first opening 120 of the brewing chamber 110 when the first plunger assembly 200 moves to one end of its stroke, so as to seal the brewing chamber 110. During coffee brewing, the delivery mechanism 260 can introduce gas into the brewing chamber 110, so as to appropriately increase the air pressure in the sealed brewing chamber 110, thereby significantly increasing the brewing speed of drip coffee while ensuring the taste and concentration of the coffee. After coffee brewing, the delivery mechanism 260 can also introduce gas into the brewing chamber 110, so as to accelerate the discharge of waste liquid, dry the coffee residue, and facilitate the cleaning of the coffee residue.

[0064] Cooperation Figure 3 And Figure 5As shown, in some embodiments, the first plunger assembly 200 comprises a first bracket 210, a second bracket 220 and a first plunger 230. The first bracket 210 is movably arranged on the main bracket 100 along the second direction. The first plunger 230 is movably arranged on the first bracket 210 along the first direction. Optionally, a sliding groove can be arranged on the main bracket 100, and a sliding rail can be arranged on the first bracket 210, and the sliding rail is slidably connected in the sliding groove. For example, two connecting plates can be arranged on the main bracket 100 oppositely, and a sliding groove can be arranged on the inner side of each of the two connecting plates, and a sliding rail can be arranged on the outer side of each of the two connecting plates oppositely, and the sliding rail is slidably connected in the corresponding sliding groove. It can be understood that the first bracket 210 can be movably connected with the main bracket 100 in various ways, and is not limited to the above connection manner.

[0065] The second bracket 220 is movably arranged on the first bracket 210 along the second direction. Optionally, another sliding rail extending along the second direction can be arranged on the outer side of the first bracket 210, and another sliding groove corresponding to the other sliding rail can be arranged on the second bracket 220, and the other sliding rail is connected in the other sliding groove, so as to slidably connect the second bracket 220 on the first bracket 210. The second bracket 220 is drivingly connected with the first driving mechanism 300 and the first plunger 230 respectively. That is, the first driving mechanism 300 is drivingly connected with the first plunger 230 through the second bracket 220.

[0066] The movement of the second bracket 220 relative to the first bracket 210 along the second direction can drive the first plunger 230 to move along the first direction, so as to block or open the first opening 120. The synchronous movement of the second bracket 220 and the first bracket 210 along the second direction can drive 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.

[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 to open the first opening 120, so as to facilitate powder loading or slag discharging, or move back to the first opening 120 to enable the first plunger 230 to block the first opening 120 again. The movement process is simple, which is conducive to simplifying the transmission structure.

[0068] In some embodiments, the first support 210 is provided with a first sliding groove 211 extending in the first direction. The second support 220 is provided with a second sliding groove 223 extending obliquely in a third direction between the first direction and the second direction and overlapping the first sliding groove 211. The first plunger 230 is provided with a first sliding block 231 slidingly connected to the overlapping region of the first sliding groove 211 and the second sliding groove 223.

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

[0070] The movement of the second support 220 in the second direction is converted into the movement of the first plunger 230 in the first direction through the structure of the sliding groove and the sliding block, which is not only simple and ingenious in design, but also helps to improve the compactness of the first plunger assembly 200 and reduce the size.

[0071] Optionally, an X-axis can be arranged in the first direction and a Y-axis can be arranged in the second direction, the movement direction of the first plunger 230 away from the first opening 120 is set as the positive direction of the X-axis, and the movement direction of the second support 220 towards the first opening 120 is set as the positive direction of the Y-axis, forming a plane rectangular coordinate system. In this way, the second sliding groove 223 can extend in a preset angle range between the positive direction of the X-axis and the positive direction of the Y-axis. When the second support 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 sliding groove 223 can also extend in the negative direction of the Y-axis, forming a horizontal extension segment. When the first plunger 230 seals the first opening 120 of the brewing cavity 110, the first sliding block 231 can be located in the horizontal extension segment. During the brewing process, even if the pressure in the brewing cavity 110 is relatively large and an upward force is applied to the first plunger 230, the first plunger 230 can be limited from moving upward by the stop of the horizontal extension segment, so as to maintain the sealing state of the first opening 120.

[0073] Cooperation Figure 3As shown, in some embodiments, the first support 210 has a first column cavity 212 arranged in a first direction, and a first sliding groove 211 is arranged through the cavity wall of the first column cavity 212. The second support 220 is arranged outside the first support 210. The first plunger 230 is movably arranged in the first column cavity 212, and the first sliding block 231 penetrates the first sliding groove 211 and extends into the second sliding groove 223. In this way, not only the structure is simple, but also the movement stability of the first plunger 230 is improved.

[0074] It can be understood that the first plunger 230 can also be movably connected with the first support 210 through other structures. For example, the first plunger 230 can be connected with the first support 210 through the structure of sliding groove and sliding block.

[0075] Optionally, the two opposite cavity walls of the first column cavity 212 are respectively provided with a first sliding groove 211. The second support 220 includes two support arms 221 arranged in parallel with each other and a connecting beam 222 connecting the two support arms 221, and the two support arms 221 are respectively located on the opposite sides of the first support 210, and the two support arms 221 are respectively provided with a second sliding groove 223, and the second sliding groove 223 overlaps with the corresponding first sliding groove 211. The opposite sides of the first plunger 230 are respectively provided with the first sliding block 231, and the first sliding block 231 penetrates the overlapping area of the corresponding first sliding groove 211 and second sliding groove 223. In this way, the first plunger 230 is balanced in force, which is beneficial to further improve the movement stability of the first plunger 230. Optionally, the connecting beam 222 can be connected at one end of the two support arms 221, and the second support 220 is in the shape of U as a whole, avoiding interference between the connecting beam 222 and the first support 210.

[0076] Optionally, a plurality of second sliding grooves 223 can be arranged on each support arm 221. For example, two second sliding grooves 223 can be arranged in a second direction in sequence, and correspondingly, two first sliding blocks 231 can be arranged on each side of the first plunger 230. In this way, the stability of the first plunger 230 can be further improved.

[0077] In some embodiments, a straight rack 224 can be arranged on the second support 220, and the first driving mechanism 300 includes a first transmission gear 320 and a first motor 310 in transmission connection with the first transmission gear 320, and the first transmission gear 320 is in engagement with the straight rack 224. The gear and rack mechanism not only has a simple structure and low cost, but also has high stability.

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

[0079] Optionally, the support arm 221 and the rack 224 can be an integral structure. For example, the rack 224 can be formed on the side edge of the support arm 221 by an integral molding process. Optionally, the two first transmission gears 320 can 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, which may be disposed on the shaft of the first motor 310 and may mesh with the first transmission gear 320. Of course, in specific implementations, 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 conveying mechanism 260 may be disposed on the first plunger assembly 200. For example, the conveying mechanism 260 may be disposed on the first plunger 230. Optionally, the conveying mechanism 260 may include a first connector 261 and a first three-way valve 262. When applied to a coffee machine, the first connector 261 may be connected to the gas 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 support 210 and the second support 220 and an unlocked state that allows relative displacement between the first support 210 and the second support 220. The second support 220 has a first travel near the first opening 120 and a second travel away from the first opening 120.

[0083] Optionally, the first stroke and the second stroke can be measured based on the overall movement trajectory of the second support 220, or based on the movement trajectory of any point on the second support 220. For example, when measuring according to one end of the second support 220, one end of the second support 220 can be... Figure 6 Point A and Figure 7 The travel between points B and C is considered the second travel, allowing the second support 220 to be positioned... Figure 7 From point B to Figure 8 The journey between points C and C is considered the first journey.

[0084] When the second holder 220 is at the first stroke, the locking mechanism is in an unlocked state, the first holder 210 and the second holder 220 can be relatively displaced, the overlapping position of the first chute 211 and the second chute 223 is changed, the first plunger 230 is driven to move in a first direction to block or open the first opening 120.

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

[0086] By setting the locking mechanism, the first plunger 230 can be ensured to move in the first direction when opposite to the first opening 120, avoiding the interference between the first plunger 230 and the main holder 100 due to the movement of the first plunger 230 in the first direction when not opposite to the first opening 120, and avoiding the scraping or extrusion of one side of the first plunger 230 with the brewing cavity wall.

[0087] In some embodiments, the locking mechanism includes a first elastic pin 241, the first elastic pin 241 is elastically arranged on one of the first holder 210 and the second holder 220, and the other of the first holder 210 and the second holder 220 is 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 holder 210 and the second holder 220, and can be pulled out of the first limiting groove 225 to allow the relative displacement of the first holder 210 and the second holder 220.

[0088] Specifically, when the second holder 220 moves along the first stroke, the first elastic pin 241 is in a state of being pulled out of the first limiting groove 225, as shown in FIG. 4. The second holder 220 can be relatively displaced with respect to the first holder 210 to drive the first plunger 230 to open or cover the first opening 120. Figure 8

[0089] When the second holder 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 FIG. 5 and FIG. 6. The second holder 220 can be relatively displaced with respect to the first holder 210 to drive the first plunger 230 to move away from the first opening 120 or move back to the first opening 120. Figure 6 Figure 7 ​​As shown. The second support 220 can drive the first support 210 and the first plunger 230 to move synchronously along the second direction, thereby moving the first support 210 and the first plunger 230 away from the first opening 120 to provide a space for adding powder or removing residue to the brewing chamber 110, or moving the first support 210 and the first plunger 230 back to a position opposite to the first opening 120, so that the first plunger 230 can seal the first opening 120 to complete the coffee 600 brewing operation.

[0090] In some embodiments, the locking mechanism further includes a second resilient pin 242, which is telescopically disposed on one of the main support 100 and the first support 210. One of the main support 100 and the first support 210 is provided with a second limiting groove 140. The second resilient pin 242 is configured to extend into the second limiting groove 140 to restrict the movement of the first support 210 when the second support 220 is in a first stroke, and to disengage from the second limiting groove 140 to allow the first support 210 to move when the second support 220 is in a second stroke.

[0091] Thus, during the movement of the first plunger 230 along the first direction driven by the second support 220, the first support 210 and the first plunger 230 can be prevented from shifting along the second direction, thereby preventing the brewing chamber wall from squeezing one side of the first plunger 230. For example, preventing the brewing chamber wall from squeezing the sealing ring on the first plunger 230 helps maintain the sealing performance of the first plunger 230.

[0092] Taking the second elastic pin 242 being disposed on the first bracket 210 and the second limiting groove 140 being disposed on the main bracket 100 as an example, when the second bracket 220 is in Figure 7 Position B in the middle and Figure 8 When the second bracket 220 moves between positions C, the second elastic pin 242 extends into the second limiting groove 140, restricting the first bracket 210 from moving. Figure 6 Position A in the middle and Figure 7 When moving between positions B, the second elastic pin 242 is in a state of disengaging from the second limiting groove 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 comprises a slag scraping component 250, which is arranged on the first support 210. During the movement of the first support 210 to the position opposite to the first opening 120, the slag scraping component 250 can scrape the coffee powder that has been pushed out of the first opening 120. In this way, the movement mechanism composed of the first support 210, the second support 220 and the first driving mechanism 300 can drive the slag scraping component 250 to complete the slag scraping operation, and the slag scraping component 250 does not need to be provided with a separate movement mechanism, which is a clever structural design and is beneficial to further simplify the structure of the drip coffee brewing device.

[0094] Optionally, the slag scraping component 250 can be arranged at one end of the first support 210 in the second direction. For example, the slag scraping component 250 can be arranged at one end of the first support 210 in the positive direction of the Y axis. Optionally, the slag scraping component 250 can be in the shape of a "C" to avoid the coffee powder overflowing to both sides.

[0095] Cooperation Figure 1 , Figure 2 and Figure 4 As shown in Figs. 1 to 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 comprises a second plunger assembly 400 and a second driving mechanism 500. The drip coffee brewing device further comprises a second plunger assembly 400 and a second driving mechanism 500, the second plunger assembly 400 extends into the brewing chamber 110 through the first opening 120; the second driving mechanism 500 is in driving 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 powder out of the first opening 120.

[0096] Optionally, the second plunger assembly 400 comprises a second plunger 410, a lead screw 420 and a nut 430. The second plunger 410 is movably arranged in the brewing chamber 110 in the first direction. The nut 430 is rotatably arranged at the second opening 130, and the threaded hole of the nut 430 is opposite to the second opening 130. The lead screw 420 is in threaded connection with the nut 430, and one end of the lead screw 420 extends into the brewing chamber 110 through the second opening 130 and is connected with the second plunger 410. The second driving mechanism 500 comprises a second motor 510, which is in driving connection with the nut 430. The second plunger 410 can complete the powder pressing and slag discharging operations.

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

[0098] Optionally, a second joint 413 can be arranged in the second plunger 410, and the second joint 413 can be used to connect with a pipeline for outputting coffee liquid. An end of the second plunger 410 close to the first opening 120 can be provided with a filter screen 440.

[0099] Cooperation Figure 13 As shown, in some embodiments, an end of the second plunger 410 close to the lead screw 420 can be provided with a connecting column 411, and one or more limiting blocks 412 can be arranged on the outer periphery of the connecting column 411. When a plurality of limiting blocks 412 are arranged on the connecting column 411, the plurality of limiting blocks 412 can be sequentially and spacedly arranged along the circumferential direction of the connecting column 411. The lead screw 420 can include a cylinder body 421, and an outer thread structure can be arranged on the outer periphery of the cylinder body 421. An inner flange 422 can be formed by extending the inlet end port of the cylinder body 421 inwardly, and the inner flange 422 can have a notch 423 corresponding to each limiting block 412 and used for avoiding the limiting block 412. For example, two limiting blocks 412 can be symmetrically arranged on the outer periphery of the connecting column 411, and two notches 423 can be symmetrically arranged on the inner flange 422 correspondingly.

[0100] During installation, the limiting blocks 412 are aligned with the notches 423, the connecting column 411 is inserted into the cylinder body 421 from the inlet end port of the cylinder body 421, and the limiting blocks 412 can be moved into the cylinder body 421 through the notches 423. Then, the connecting column 411 is rotated so that the limiting blocks 412 are staggered with the notches 423, and the limiting blocks 412 can limit the connecting column 411 from being pulled out of the cylinder body 421. During disassembly, the connecting column 411 is reversely rotated so that the limiting blocks 412 are aligned with the notches 423, and the connecting column 411 is pulled out. In this way, the second plunger 410 and the lead screw 420 are not only firmly connected, but also easy to disassemble, which facilitates the cleaning or maintenance of the second plunger 410 and the lead screw 420.

[0101] Optionally, the extending end of the barrel 421 is detachably connected with a stop component 424. When the stop component 424 is connected with the barrel 421, the stop component 424 can stop the main support 100, so as to limit the extension of the second plunger 410 from the first opening 120 by the lead screw 420. When the stop component 424 is detached from the barrel 421, the second plunger 410 can be extended from the first opening 120 by the lead screw 420.

[0102] In the normal use state, the stop component 424 can be installed at the extending end of the barrel 421, and the stop component 424 can stop the main support 100, so as to limit the extension of the second plunger 410 from the first opening 120, as shown in Figure 11 When the second plunger 410 needs to be detached, the stop component 424 can be detached from the barrel 421, and the nut 430 can drive the lead screw 420 to continue moving in the extending direction by a stroke corresponding to the size of the stop component 424, so as to drive the second plunger 410 to extend from the first opening 120, facilitating the user to detach the second plunger 410 from the barrel 421, as shown in Figure 12

[0103] Optionally, the stop component 424 can be semicircular, as shown in Figure 4 The extending end of the barrel 421 can extend radially outward to form an outer flange, and the semicircular support component can be clamped outside the barrel 421 and located at a position between the outer threaded structure and the outer flange. In this way, the stop component 424 can be stably connected to the barrel 421 to avoid falling off during use, and the stop component 424 can also avoid occupying space.

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

[0105] 1), the initial state can be as shown in Figure 5 and Figure 6 The first support 210, the second support 220 and the first plunger 230 are in a state of avoiding the first opening 120, and the first opening 120 is in an open state. The first elastic pin 241 can be embedded in the first limiting groove 225. The first sliding groove 211 and the second sliding groove 223 overlap at an end of the first sliding groove 211 away from the first opening 120, so that the first plunger 230 has a certain gap with the end face of the brewing cavity 110. The second plunger 410 can be located at a position close to the second opening 130.

[0106] 2), coffee 600 can be added into the brewing cavity 110 through the first opening 120 by, for example, a grinding mechanism or a powder loading mechanism, as shown in Figure 6 ​as shown.

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

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

[0109] 5), after the waste liquid is discharged, the second bracket 220 can be driven to move in the negative direction of 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 slot 140, and the first bracket 210 does not follow. The first sliding groove 211 and the second sliding groove 223 drive the first plunger 230 to move in the positive direction of X axis, and the first opening 120 is opened. 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 slot 225. When the second bracket 220 continues to move in the negative direction of Y axis, the second elastic pin 242 is disengaged from the second limiting slot 140, and the first bracket 210 and the first pin follow, and move to completely avoid the first opening 120, as shown. Figure 9 ​

[0110] 6) The second plunger 410 is driven by the second driving mechanism 500 to move in the positive direction of the X axis, pushing the coffee 600 in the brewing chamber 110 out of the first opening 120, as shown in Figure 10 .

[0111] 7) The first support 210 is driven by the first driving mechanism 300 to move back to a position opposite to the first opening 120. At the same time, the first support 210 drives the scraping component 250 to move in the positive direction of the Y axis, scraping the coffee 600 at the first opening 120, as shown in Figure 11 .

[0112] 8) The first plunger assembly 200, the second plunger assembly 220 and the first plunger 230 can be restored to the initial state as shown in Figure 5 .

[0113] In some embodiments, the drip coffee brewing device can further comprise a pause sensing component for triggering the first driving mechanism 300 to stop the first plunger assembly 200 when the first plunger assembly 200 is sensed to be at a pause position. When the first plunger assembly 200 is at the pause position, the delivery mechanism 260 of the first plunger assembly 200 is 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 pause sensing component can comprise a Hall sensor and two magnets. The Hall sensor can be arranged on the main support 100, and the two magnets can be installed at the joint of the straight rack 224 and the connecting beam 222. During the process of the first plunger assembly 100 closing the first opening 120 of the brewing chamber 110, when one of the magnets approaches the Hall sensor, the Hall sensor can generate a first sensing signal to trigger the first motor 310 to slow down. When the other magnet approaches the Hall sensor, the Hall sensor can generate a second sensing signal to trigger the first motor 310 to stop by braking. At this time, the first plunger assembly 200 is exactly at the pause position, the first plunger assembly 200 is opposite to the first opening 120 but has not closed the first opening 120, and the delivery mechanism 260 on the first plunger assembly 200 is above the first opening 120 and can inject brewing liquid into the brewing chamber 110. In this way, injecting hot water into the brewing chamber while allowing air in the chamber to escape from the periphery of the first opening 120 which is not completely sealed can avoid the air in the chamber being automatically compressed to generate pressure, which results in the speed and concentration of the drip coffee being unable to be controlled.

[0115] Referring to Figure 14As shown, the embodiments of the present application also provide a drip coffee machine, which comprises a gas supply system and the drip coffee brewing device according to any of the above embodiments, the gas supply system is connected with the delivery mechanism 260 of the drip coffee brewing device, and the gas supply system is used to supply gas to the delivery mechanism 260. Since the drip coffee brewing device has the advantages of fast dripping speed and easy cleaning, the drip coffee machine using the drip coffee brewing device also has the above advantages.

[0116] Optionally, the drip coffee machine can further comprise a water supply system, a grinding device, a residue container and a liquid outlet system, etc. The grinding device can be used to fill coffee powder into the brewing chamber 110 through the first opening 120. The water supply system can be connected with the delivery mechanism 260 on the first plunger 230, and water can be supplied into the brewing chamber 110 through the delivery mechanism 260 to brew coffee. The brewed coffee liquid can be delivered to a coffee cup or a coffee pot through the liquid outlet system. The residue container is used to hold coffee residue.

[0117] Optionally, the water supply system can comprise a water pump 701, a first three-way joint 702 and a heater 703, and the water pump 701 can be connected with the heater 703 through the first three-way joint 702. The gas supply system can comprise a gas pump 704. The first joint 261 can be connected with the heater 703 and the gas pump 704 through the first three-way valve 262 respectively. The heater 703 can supply hot water to the first joint 262 through the first three-way valve 262. The gas pump 704 can supply air to the first joint 262 through the first three-way valve 262.

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

[0119] The above embodiments are only exemplary embodiments of the present application, and are not used to limit the present application, and the protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements should also be considered to fall within the protection scope of the present application.

Claims

1. A drip filter coffee brewing device, characterized in that, The utility model relates to a coffee machine, comprising: a main support (100) provided with a brewing cavity (110) having a first opening (120) at one end in a first direction; a delivery mechanism (260) capable of communicating with the brewing cavity (110) and introducing gas into the brewing cavity (110); a first plunger assembly (200) movably arranged on the main support (100) in a second direction perpendicular to the first direction; the first plunger assembly (200) is capable of blocking the first opening (120) when moving to one end of its stroke and capable of opening the first opening (120) when moving to the other end of its stroke; a first driving mechanism (300) in driving connection with the first plunger assembly (200), the first driving mechanism (300) being used for driving the first plunger assembly (200) to reciprocate in its stroke; the first plunger assembly (200) comprises: a first support (210) movably arranged on the main support (100) in the second direction; a first plunger (230) movably arranged on the first support (210) in the first direction; a second support (220) movably arranged on the first support (210) in the second direction, and the second support (220) is in driving connection with the first driving mechanism (300) and the first plunger (230) respectively; wherein the second support (220) moving in the second direction relative to the first support (210) can drive the first plunger (230) to move in the first direction to block or open the first opening (120); the second support (220) and the first support (210) moving synchronously in the second direction can drive the first plunger (230) to move synchronously to move away from the first opening (120) or move back to the first opening (120); the first support (210) is provided with a first sliding groove (211) extending in the first direction; the second support (220) is provided with a second sliding groove (223) extending obliquely in a third direction between the first direction and the second direction and overlapping with the first sliding groove (211); the first plunger (230) is provided with a first sliding block (231) slidingly connected to the overlapping area of the first sliding groove (211) and the second sliding groove (223); the first plunger assembly (200) further comprises a locking mechanism having a locked state limiting the first support (210) and the second support (220) from relative displacement and an unlocked state allowing the first support (210) and the second support (220) to have relative displacement.

2. The drip filter coffee brewing device according to claim 1, wherein, the delivery mechanism (260) is arranged on the first plunger assembly (200).

3. The drip filter coffee brewing device according to claim 1, wherein, The first support (210) has a first column cavity (212) arranged in a first direction, and a first sliding slot (211) penetrating the cavity wall of the first column cavity (212); The second support (220) is arranged outside the first support (210); The first plunger (230) is movably arranged in the first column cavity (212), and the first sliding block (231) penetrates the first sliding slot (211) and extends into the second sliding slot (223).

4. The drip filter coffee brewing device according to claim 1, wherein, The second support (220) is provided with a straight rack (224), and the first driving mechanism (300) comprises a first transmission gear (320) and a first motor (310) in transmission connection with the first transmission gear (320), and the first transmission gear (320) is in mesh with the straight rack (224).

5. The drip filter coffee brewing device according to claim 1, wherein, The second support (220) has a first stroke close to the first opening (120) and a second stroke away from the first opening (120); when the second support (220) is in the first stroke, the locking mechanism is in an unlocked state; when the second support (220) is in the second stroke, the locking mechanism is in a locked state.

6. The drip filtered coffee brewing device according to claim 5, wherein, The locking mechanism comprises a first elastic pin (241), which is movably arranged on one of the first support (210) and the second support (220), and the other of the first support (210) and the second support (220) is 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 support (210) and the second support (220), and can also be pulled out of the first limiting groove (225) to allow the relative displacement of the first support (210) and the second support (220).

7. The drip filtered coffee brewing device according to claim 6, wherein, The locking mechanism further comprises a second elastic pin (242), which is movably arranged on one of the main support (100) and the first support (210), and the other of the main support (100) and the first support (210) is provided with a second limiting groove (140); The second elastic pin (242) is configured to extend into the second limiting groove (140) when the second support (220) is in the first stroke to limit the following of the first support (210), and to be pulled out of the second limiting groove (140) when the second support (220) is in the second stroke to allow the following of the first support (210).

8. The drip filter coffee brewing device according to claim 1, wherein, The first plunger assembly (200) further comprises a slag scraping component (250) arranged on the first support (210), which can scrape the coffee dregs pushed out of the first opening (120) during the movement of the first support (210) back to the position opposite to the first opening (120).

9. The drip filtered coffee brewing device according to claim 8, wherein, The brewing cavity (110) has a second opening (130) at the other end in the first direction; 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 in driving connection with the second plunger assembly (400) for driving the second plunger assembly (400) to move along the first direction to push the coffee residue out of the first opening (120).

10. The drip filtered coffee brewing device according to claim 9, wherein, The second plunger assembly (400) comprises: a nut (430) rotatably arranged at the second opening (130) and having an axis extending along the first direction, the nut (430) being in driving connection with the second driving mechanism (500); a screw rod (420) in threaded connection with the nut (430), and one end of the screw rod (420) extending into the brewing cavity (110) via the second opening (130); a second plunger (410) in detachable connection with the extending end of the screw rod (420); a stopper (424) detachably connected at the other end of the screw rod (420), the stopper (424) being used for adjusting the stroke of the screw rod (420) to limit or allow the screw rod (420) to drive the second plunger (410) to extend out of the first opening (120).

11. The drip filter coffee brewing device according to claim 2, wherein, a middle-stop sensing member for sensing when the first plunger assembly (200) is in a middle-stop position and triggering the first driving mechanism (300) to stop the first plunger assembly (200); when the first plunger assembly (200) is in the middle-stop position, the delivery mechanism (260) of the first plunger assembly (200) moves above 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).

12. A drip coffee maker characterized in that, a gas supply system connected with the delivery mechanism (260). The brewing device comprises a gas supply system connected with the delivery mechanism (260).

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