Disclosure of Invention
The invention provides a novel structure of the grinding coffee machine for overcoming the defects of the prior art, which can not only avoid the technical problems that a coffee powder flow channel is blocked and is not easy to clean on the basis of ensuring that the thickness of the ground coffee powder is more uniform, but also has a simpler structure and is beneficial to reducing the manufacturing cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
The utility model provides a grind coffee machine, includes the host computer that is equipped with hot water entry, is used for holding the coffee cup of coffee finished product, be equipped with grinding motor on the host computer, its characterized in that:
the grinding coffee machine further comprises a processing bucket, wherein the processing bucket comprises a grinding brewing bucket and an outer bucket, and a coffee liquid outlet is formed in the outer bucket;
The grinding brewing hopper comprises a bean bin capable of containing coffee beans, a rotary cutter head and a filter screen assembly capable of filtering coffee liquid; the bottom of the bean bin is provided with a fixed cutter disc, and the axial directions of the bean bin and the fixed cutter disc are provided with a feed inlet for the rotary cutter disc to penetrate through and for coffee beans to pass through; a first magnet group is arranged at one end of the rotary cutter head, and a second magnet group is arranged at the bottom of the filter screen assembly;
When the processing hopper is mounted on the host machine, the grinding motor is positioned above the processing hopper; the bean bin is assembled to the filter screen assembly to form a first cavity for brewing coffee grounds; when the grinding motor does not work, one end of the rotary cutter head penetrates through the feeding hole and is connected with the grinding motor, the rotary cutter head is provided with a movable space which moves along the side axial direction of the grinding motor, and the first magnet group and the second magnet group are attracted to each other so that the other end of the rotary cutter head is attached to the bottom of the inner side of the filter screen assembly; when the grinding motor works, the first magnet group and the second magnet group repel each other so that the rotary cutter disc floats on the bottom of the inner side of the filter screen assembly, the rotary cutter disc abuts against the grinding motor, and the fixed cutter disc and the rotary cutter disc relatively rotate to grind coffee beans; the grinding brewing hopper is sleeved in the outer hopper, and a second containing cavity is formed between the grinding brewing hopper and the outer hopper; the hot water inlet, the bean bin, the feeding port, the first containing cavity, the second containing cavity and the coffee liquid outlet are sequentially communicated.
Further, the bean bin and the filter screen assembly are assembled in a screwing mode.
Further, a clamping ring is arranged on the outer side of the top end of the bean bin, and a plurality of first limit marks are arranged on the upper surface of the clamping ring;
The inner wall of the outer bucket is sequentially provided with a first step surface and a second step surface in a circumferential direction from top to bottom, and a plurality of second limit marks are arranged on the first step surface;
the first limit mark is adjusted to correspond to the second limit mark, and the clamping ring is in limit fit with the second step surface, so that the bean bin is limited in the rotating direction;
The outer wall of the clamping ring of the bean bin is provided with a first rotary mark, and the outer wall of the filter screen assembly is provided with a plurality of second rotary marks which can correspond to the first rotary marks;
The bottom of the outer side of the filter screen assembly is provided with a plurality of first limit ribs, and the bottom of the inner side of the outer hopper is provided with a plurality of second limit ribs corresponding to the first limit ribs respectively;
when the first rotary mark corresponds to one of the second rotary marks so that the bean bin and the filter screen assembly are in a loose fit state, after the grinding brewing bucket is put into the outer bucket, one of the first limit ribs and the second limit rib corresponding to the first limit rib form limit, so that the filter screen assembly is limited in the rotary direction.
Further, the limit fit of the snap ring and the second step surface is tooth-shaped fit.
Further, the structural form of tooth-shaped fit comprises:
Four toothed parts are arranged on the clamping ring and are uniformly distributed in the circumferential direction, and the four toothed parts correspond to the first limit marks; the second step surface is an annular tooth, and the annular tooth corresponds to each second limit mark; the teeth cooperate with the annular teeth.
Further, the upper surface of the clamping ring and the first step surface are located on the same plane.
Furthermore, the first limit mark, the second rotary mark, the first limit rib and the second limit rib are circumferentially and uniformly distributed.
Further, a limiting mechanism for limiting the shaking of the rotary cutterhead is arranged at the joint of the rotary cutterhead and the filter screen assembly.
Further, one structural form of the limiting mechanism includes: the rotary cutterhead is provided with a first groove at one end connected with the filter screen assembly, and a first protruding part is arranged at the bottom of the inner side of the filter screen assembly; the first projection and the first recess cooperate with each other when the bucket is mounted to the main machine.
Further, another structural form of the limiting mechanism includes:
A limiting ring is arranged at the bottom of the inner side of the filter screen assembly; when the processing bucket is mounted on the host machine, a part of the rotary cutter disc is positioned in the limiting ring.
Further, the first magnet group comprises a plurality of large magnets and a plurality of small magnets, and the large magnets and the small magnets are spaced one by one and are circumferentially and uniformly distributed;
the second magnet group comprises a plurality of large magnets and a plurality of small magnets, and the large magnets and the small magnets are spaced one by one and are uniformly distributed in the circumferential direction;
The magnet uniform distribution modes of the first magnet group and the second magnet group are completely consistent.
Further, the diameter of the large magnet is 9-14 mm, and the thickness is 2-7 mm; the diameter of the small magnet is 5-9 mm, and the thickness is 2-7 mm.
Further, the diameter of the large magnet is 10mm, and the thickness of the large magnet is 3mm; the diameter of the small magnet is 6mm, and the thickness of the small magnet is 3mm.
Further, the preparation material of the large magnet comprises a non-demagnetizing material with the temperature of more than 120 ℃, and the preparation material of the small magnet comprises a non-demagnetizing material with the temperature of more than 120 ℃.
Further, the rotary cutter comprises a coupling head, a rotary cutter body provided with a first central through hole, a rotary cutter outer sealing ring, a rotary cutter fixing upper cover provided with a second central through hole, a rotary cutter inner sealing ring, a transmission shaft and a rotary cutter fixing seat;
One end of the transmission shaft is connected with the rotary cutter head fixing seat, and the other end of the transmission shaft sequentially penetrates through the rotary cutter head inner sealing ring, the second center through hole, the rotary cutter head outer sealing ring and the first center through hole and then is connected with the coupling head; when the processing hopper is mounted on the main machine, the coupling head is coupled and connected with a power shaft of the grinding motor; a motor shaft sealing ring is arranged in a gap between the power shaft of the grinding motor and the main machine;
the rotary cutter head main body, the rotary cutter head outer sealing ring, the rotary cutter head fixing upper cover and the rotary cutter head inner sealing ring are matched with each other to seal gaps, and the first magnet group is sealed in the rotary cutter head fixing seat.
Further, the transmission shaft and the rotary cutterhead fixing seat are integrally processed or separately processed.
Further, the fixed cutter and the rotary cutter rotate relatively to grind coffee beans, and the structure comprises:
The outer end face of the fixed cutter disc is annularly provided with a first inclined plane adjacent to the feeding hole, and the outer end face of the rotary cutter disc main body is annularly provided with a second inclined plane adjacent to the first central through hole;
When the processing bucket is mounted on the host machine, the fixed cutter disc and the rotary cutter disc are oppositely arranged, a gap is arranged between the fixed cutter disc and the rotary cutter disc, and the first inclined surface and the second inclined surface form a V-shaped groove.
Further, the outer end surface of the fixed cutter, the first inclined surface, the outer end surface of the rotary cutter main body and the surface of the second inclined surface are all in a zigzag shape.
Furthermore, the preparation materials of the inner sealing ring of the rotary cutter head and the outer sealing ring of the rotary cutter head comprise edible temperature-resistant silicone rubber; the preparation materials of the rotary cutterhead fixing upper cover comprise temperature-resistant plastics; the preparation materials of the coupling head, the rotary cutterhead main body, the transmission shaft and the rotary cutterhead fixing seat all comprise stainless steel.
Further, the filter screen assembly comprises a filter screen main body capable of filtering coffee liquid, a filter screen bottom base and a filter screen base sealing ring;
the filter screen bottom base, the filter screen base sealing washer with filter screen main part inboard bottom mutually support, make the second magnet group seal in filter screen main part inboard bottom.
Further, an annular convex rib is arranged at the bottom of the inner side of the filter screen main body; when the processing bucket is mounted on the host machine, the annular convex rib is positioned between the rotary cutter disc and the bottom of the inner side of the filter screen assembly.
Further, the preparation materials of the filter screen base sealing ring comprise edible temperature-resistant silicone rubber; the preparation materials of the filter screen bottom base comprise stainless steel; the side wall of the filter screen main body is a metal screen with 100-350 meshes, and the rest of the preparation materials comprise temperature-resistant plastics.
Further, the mesh number of the metal mesh is 300 mesh.
Further, a stop block for guiding coffee beans to fall into the feeding port is arranged at the position, close to the feeding port, inside the bean bin.
Further, the inner side of the top end of the bean bin is provided with a plurality of notches for the hot water inlet to be communicated with the inside of the bean bin.
Further, when the processing hopper is mounted on the host machine, a first annular sealing ring and a second annular sealing ring are arranged in a gap between the processing hopper and the host machine; the first annular sealing ring and the second annular sealing ring are respectively positioned on the inner side and the outer side of the notch.
Further, the preparation material of the bean bin comprises temperature-resistant plastic, and the preparation material of the fixed cutter head comprises stainless steel or ceramic.
Further, the host machine also comprises a water tank, a water conduit, a heating component, a control circuit board, a reset temperature controller for preventing dry combustion, and a power connector;
The water tank is communicated with the hot water inlet through the water diversion pipe, the heating component is arranged on the water diversion pipe, and a float valve is arranged on a channel of the water diversion pipe; the reset temperature controller is arranged on the heating component;
the power connector is electrically connected with the control circuit board, and the grinding motor, the heating assembly and the reset temperature controller are electrically connected with the control circuit board.
Further, the structural form of the processing bucket mounted to the host machine comprises:
the inner wall of the outer bucket is provided with a plurality of second grooves, and the side wall of the main machine is provided with a plurality of second protruding parts; the shape flow direction of each second groove faces the bottom of the outer bucket;
A handle is arranged on the outer wall of the outer bucket, and a locking limit groove is formed in the upper surface of the handle; the main machine is provided with a spring ejector rod with a vertical downward direction;
each second groove is matched with each second protruding part in a buckling mode, and when the spring ejector rod falls into the locking limiting groove, the processing bucket is installed in place.
Further, a Hall sensor is arranged on the host and is electrically connected with the control circuit board; an induction magnet is arranged at the upper part of the handle; when the processing hopper is installed in place, the induction magnet corresponds to the Hall sensor.
Further, the host is provided with a plurality of illuminating lamps for illuminating the inside of the processing hopper, and each illuminating lamp is electrically connected with the control circuit board; and a lampshade is arranged outside each illuminating lamp, and an O-shaped sealing ring is arranged between each lampshade and the host.
Compared with the prior art, the invention has the following beneficial technical effects:
(1) The grinding motor is arranged above the processing hopper when the processing hopper is arranged on the main machine, namely, compared with a traditional grinding coffee machine, the grinding machine is arranged above the grinding motor, so that a grinding area and a brewing area can be integrated into a compact working space, a coffee powder channel is not required to be arranged independently to communicate the grinding area with the brewing area, and the technical problem of blockage of a coffee powder flow channel of the traditional grinding coffee machine is thoroughly solved.
(2) The grinding coffee machine provided by the invention is used for grinding coffee beans, brewing coffee powder, or filtering coffee liquid, and all parts such as the bean bin, the rotary cutter disc, the filter screen assembly, the outer hopper and the like can be detached to be cleaned independently when the coffee machine does not work, so that the cleaning of a grinding and brewing space is facilitated, and the good taste of a finished product of the coffee liquid is further effectively ensured.
(3) According to the coffee grinding machine provided by the invention, the first magnet group is arranged at one end of the rotary cutter head, the second magnet group is arranged at the bottom of the filter screen assembly, when the grinding motor works, the first magnet group and the second magnet group repel each other, so that the rotary cutter head is suspended on the bottom of the inner side of the filter screen assembly, and the rotary cutter head is tightly propped against the side of the grinding motor. Based on the suspension state of the rotary cutter head when the grinding motor works, the rotary cutter head is effectively prevented from shaking in the working process of the coffee grinder, so that the rotary cutter head and the fixed cutter head can be effectively ensured to rotate stably and relatively, and the coffee grinder provided by the invention has more uniform thickness of coffee powder obtained by grinding compared with the traditional coffee grinder. Moreover, the coffee grinder provided by the invention has the advantages of low working noise and the like.
(4) The coffee grinder provided by the invention has the advantages that the structure of the coffee beverage making space is simplified, the equipment manufacturing cost is reduced, the coffee grinder is convenient to operate, and good use experience can be provided for users.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly practiced by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
Example 1
The embodiment discloses a grinding coffee machine, which comprises a main machine 1 provided with a hot water inlet 11, a coffee cup 2 for containing coffee products and a processing hopper 3, wherein a grinding motor 12 is arranged on the main machine 1, as shown in figures 1-29.
The processing bucket 3 comprises a grinding brewing bucket 31 and an outer bucket 32, and a coffee liquid outlet 321 is arranged on the outer bucket 32; in the present embodiment, as shown in fig. 21, a drip valve 322 for controlling the flow of the coffee liquid is provided at the coffee liquid outlet 321.
As shown in fig. 16-19, the grinding brew chamber 31 includes a bean bin 311 for holding coffee beans, a rotary cutter head 312, a filter screen assembly 313 for filtering coffee liquor; the bottom of the bean bin 311 is provided with a fixed cutter 314, and in particular, in this embodiment, as shown in fig. 10, the fixed cutter 314 is fastened to the bottom of the bean bin 311 by using a screw 315, but the present invention is not limited to such a connection manner.
The bean bin 311 and the fixed cutter 314 are provided with a feed inlet 316 in the axial direction for the rotary cutter 312 to penetrate and for coffee beans to pass through; one end of the rotary cutter head 312 is provided with a first magnet group 317, and the bottom of the filter screen assembly 313 is provided with a second magnet group 318.
17, 21 And 24-25, when the processing hopper 3 is mounted on the main machine 1, the grinding motor 12 is positioned above the processing hopper 3, so that the arrangement below the main machine 1 is more reasonable and compact; the bean bin 311 is fitted to the filter screen assembly 313 to form a first cavity 319 for brewing coffee grounds; when the grinding motor 12 is not in operation, one end of the rotary cutter head 312 penetrates through the feed port 316 and is connected with the grinding motor 12, the rotary cutter head 312 is provided with a movable space axially moving along the grinding motor 12, and the first magnet group 317 and the second magnet group 318 are attracted to each other so that the other end of the rotary cutter head 312 is attached to the bottom of the inner side of the filter screen assembly 313; when the grinding motor 12 works, the first magnet group 317 and the second magnet group 318 repel each other to make the rotary cutter head 312 float on the bottom of the inner side of the filter screen assembly 313, and the rotary cutter head 312 abuts against the grinding motor 12 side, and the fixed cutter head 314 and the rotary cutter head 312 relatively rotate to grind the coffee beans; the grinding brewing bucket 31 is sleeved in the outer bucket 32, and a second containing cavity 3110 is formed between the grinding brewing bucket and the outer bucket; the hot water inlet 11, the bean cabin 311, the feed inlet 316, the first holding cavity 319, the second holding cavity 3110 and the coffee outlet 321 are communicated in sequence.
Based on the design of the above structure, the grinding coffee machine in this embodiment moves the grinding motor 12 upwards, so that the grinding area and the brewing area are more compact, and the coffee powder channel is not required to be arranged, thereby avoiding the technical problems that the coffee powder channel of the traditional grinding coffee machine is easy to block and difficult to clean. In addition, the grinding coffee machine of the present embodiment introduces the first magnet group 317 and the second magnet group 318, and during the working process of the grinding motor 12, the rotary cutter head 312 maintains a suspension state due to mutual repulsion between the magnets, so that the rotary cutter head 312 and the fixed cutter head 314 can rotate smoothly and relatively, and further, uniformity of the thickness of the ground coffee powder is effectively ensured.
The size of the ground coffee powder depends on the gap between the rotary cutter head 312 and the fixed cutter head 314, and in this embodiment, the bean bin 311 and the filter screen assembly 313 are assembled by screwing, so the size of the gap between the rotary cutter head 312 and the fixed cutter head 314 depends on the screwing angle of the bean bin 311 and the filter screen assembly 313. In addition, in order to enhance the sealing effect of the cooperation between the bean bin 311 and the filter screen 313, a corresponding sealing ring may be additionally provided between the bean bin 311 and the filter screen 313.
In this embodiment, as shown in fig. 7, 9-13, 16, 18, 20, and 22, a snap ring 3111 is provided on the outer side of the top end of the bean bin 311, and a plurality of first limit markers 31111 are provided on the upper surface of the snap ring 3111;
The inner wall of the outer bucket 32 is sequentially provided with a first step surface 323 and a second step surface 324 in a circumferential direction from top to bottom, and the first step surface 323 is provided with a plurality of second limit marks 3231;
the first limit mark 31111 is adjusted to correspond to the second limit mark 3231, and the clamping ring 3111 is in limit fit with the second step surface 324, so that the bean bin 311 is limited in the rotation direction, and specifically, the bean bin 311 is limited to rotate by the outer bucket 32;
The outer wall of the clamping ring 3111 of the bean bin 311 is provided with a first rotary mark 31112, and the outer wall of the filter screen assembly 313 is provided with a plurality of second rotary marks 3131 which can correspond to the first rotary mark 31112. Based on this, when the bean bin 311 is screwed to the tightest, the gap between the rotary cutter head 312 and the fixed cutter head 314 is the smallest, i.e., the ground coffee powder is the thinnest; the bean bin 311 is rotated to adjust the first rotary marks 31112 to correspond to the second rotary marks 3131, respectively, so that the gap between the rotary cutter head 312 and the fixed cutter head 314 is increased, thereby adjusting the ground coffee to be coarser.
It is apparent that when the bean bin 311 is screwed to the tightest, the relative positions of the bean bin 311 and the filter screen assembly 313 are fixed, and when the bean bin 311 is rotated to adjust the first rotation mark 31112 to correspond to the other second rotation mark 3131, that is, the relative positions of the bean bin 311 and the filter screen assembly 313 cannot be fixed before the bean bin 311 and the filter screen assembly 313 are put into the outer hopper 32. Therefore, in this embodiment, as shown in fig. 7, 20, 21, 24, and 25, the bottom of the outer side of the filter screen assembly 313 is provided with a plurality of first stop ribs 3132, and the bottom of the inner side of the outer bucket 32 is provided with a plurality of second stop ribs 325 corresponding to the first stop ribs 3132, respectively; when the first rotary mark 31112 corresponds to one of the second rotary marks 3131 so that the bean bin 311 and the filter screen assembly 313 are in a loose state, after the grinding brewing bucket 31 is placed in the outer bucket 32, one of the first limit ribs 3132 and the second limit rib 325 corresponding thereto form a limit, so that the filter screen assembly 313 is limited in the rotation direction (specifically, the filter screen assembly 313 is limited to rotate by the outer bucket 32), thereby ensuring that the bean bin 311 and the filter screen assembly 313 are not screwed with each other in the grinding process of coffee beans, and further ensuring that the gap between the rotary cutter disc 312 and the fixed cutter disc 314 is a set size. In other words, the grinding coffee machine of the invention not only can accurately adjust the thickness of the ground coffee powder, but also can ensure the uniformity of the ground coffee powder on the premise of not additionally adding any auxiliary fixing parts.
Specifically, the limit fit of the snap ring 3111 and the second step surface 324 is a tooth-shaped fit, and in this embodiment, as shown in fig. 10 and 20-22, the tooth-shaped fit includes:
four tooth-shaped parts 31113 are arranged on the clamping ring 3111, are uniformly distributed in the circumferential direction, and the four tooth-shaped parts 31113 correspond to the first limit marks 31111; the second step surface 324 is an annular tooth, which corresponds to each second limit mark 3231; the teeth 31113 cooperate with the annular teeth.
The above-mentioned tooth-shaped engagement may make the limit engagement of the snap ring 3111 with the second step surface 324 very stable, but it should be noted that the limit engagement of the snap ring 3111 with the second step surface 324 is not limited thereto.
In this embodiment, as shown in fig. 21, the upper surface of the snap ring 3111 is in the same plane with the first step surface 323, so as to facilitate adjustment of the assembly position between the bean bin 311 and the outer bucket 32, so as to ensure the accuracy and stability of the assembly of the two. The first limit mark 31111, the second limit mark 3231, the second rotary mark 3131, the first limit rib 3132 and the second limit rib 325 are all circumferentially and uniformly distributed, so that the thickness of the ground coffee powder can be accurately adjusted.
The connection between the rotary cutterhead 312 and the filter screen assembly 313 is provided with a limiting mechanism for limiting the wobble of the rotary cutterhead 312, specifically, in this embodiment, as shown in fig. 8, 17, 21, 24, 25, the limiting mechanism has a structural form including:
the bottom of the inner side of the filter screen assembly 313 is provided with a limiting ring 3133; when the processing bucket 3 is mounted on the main machine 1, a part of the rotary cutterhead 312 is positioned in the limiting ring 3133, so that the center positioning of the rotary cutterhead 312 is realized, and the rotary cutterhead 312 can be effectively limited from shaking in the rotation process.
In this embodiment, as shown in fig. 2, the rotary cutter head 312 includes a coupling head 3121, a rotary cutter head main body 3122 provided with a first central through hole 31221, a rotary cutter head outer seal ring 3123, a rotary cutter head fixing upper cover 3124 provided with a second central through hole 31241, a rotary cutter head inner seal ring 3125, a transmission shaft 3126, and a rotary cutter head fixing seat 3127;
one end of a transmission shaft 3126 is connected with the rotary cutter head fixing seat 3127, and the other end of the transmission shaft 3126 sequentially penetrates through the rotary cutter head inner sealing ring 3125, the second central through hole 31241, the rotary cutter head outer sealing ring 3123 and the first central through hole 31221 and then is connected with the coupling head 3121; when the processing bucket 3 is installed on the main machine 1, the coupling head 3121 is coupled with the power shaft of the grinding motor 12; a motor shaft sealing ring 4 is arranged in a gap between a power shaft of the grinding motor 12 and the main machine 1 so as to prevent water vapor from entering the main machine 1 during coffee brewing and damaging internal parts of the main machine 1;
The rotary cutter body 3122, the rotary cutter outer seal 3123, the rotary cutter fixing upper cover 3124, and the rotary cutter inner seal 3125 are matched with each other to seal the gaps, and the first magnet group 317 is sealed in the rotary cutter fixing seat 3127. In the present embodiment, as shown in fig. 3, the rotary cutter body 3122 and the rotary cutter holder 3127 are fastened and connected using the screw 315, but the present invention is not limited to such a connection manner.
Wherein the transmission shaft 3126 is integrally or separately processed with the rotary cutter head fixing seat 3127. In this embodiment, in order to reduce the difficulty of the processing technology, the transmission shaft 3126 and the rotary cutter head fixing seat 3127 are separately processed, and are connected by the lack of the end of the transmission shaft 3126 and the protruding position on the rotary cutter head fixing seat 3127, and can integrally rotate.
In this embodiment, the fixed cutter 314 and the rotary cutter 312 rotate relatively to grind coffee beans, and the structure includes:
as shown in fig. 2, 10, 17 and 19, the outer end surface of the fixed cutter 314 is provided with a first inclined surface 3141 circumferentially adjacent to the feed port 316, and the outer end surface of the rotary cutter body 3122 is provided with a second inclined surface 31222 circumferentially adjacent to the first central through hole 31221;
When the processing bucket 3 is mounted on the host machine 1, the fixed cutter 314 and the rotary cutter 312 are arranged oppositely, a gap is arranged between the fixed cutter 314 and the rotary cutter 312, and the first inclined surface 3141 and the second inclined surface 31222 form a V-shaped groove, so that coffee beans can enter the gap between the fixed cutter 314 and the rotary cutter 312 more smoothly.
In the present embodiment, as shown in fig. 2, 10, 17, 19 and 21, the outer end surface of the fixed cutter 314, the first inclined surface 3141, the outer end surface of the rotary cutter body 3122 and the surface of the second inclined surface 31222 are all serrated, and such rough surfaces are more beneficial for sucking coffee beans into the gap between the fixed cutter 314 and the rotary cutter 312 for grinding, but the present invention is not limited thereto.
In this embodiment, the preparation materials of the inner seal ring 3125 and the outer seal ring 3123 of the rotary cutter head comprise edible temperature resistant silicone rubber; the preparation materials of the rotary cutterhead fixed upper cover 3124 comprise temperature resistant plastics; the coupling head 3121, the rotary cutter body 3122, the drive shaft 3126, and the rotary cutter holder 3127 are all made of stainless steel.
In this embodiment, as shown in fig. 7-9, the filter assembly 313 includes a filter body 3134 that can filter coffee liquid, a filter bottom base 3135, and a filter base seal 3136;
The filter bottom base 3135 and the filter base sealing ring 3136 are matched with the inner bottom of the filter main body 3134, so that the second magnet set 318 is sealed at the inner bottom of the filter main body 3134. In the present embodiment, as shown in fig. 7, the filter screen main body 3134 and the filter screen bottom base 3135 are fastened and connected using the screw 315, but the present invention is not limited to this connection.
In this embodiment, as shown in fig. 19, an annular rib 3137 is provided at the bottom of the inner side of the filter screen body 3134; when the processing bucket 3 is mounted on the main machine 1, the annular ribs 3137 are located between the rotary cutter head 312 and the bottom of the inner side of the filter screen assembly 313, so that annular line contact is formed between the rotary cutter head 312 and the filter screen assembly 313, and stable rotation of the rotary cutter head 312 is guaranteed.
In this embodiment, the filter screen base seal ring 3136 is made of food grade temperature resistant silicone rubber; the filter screen bottom base 3135 is made of stainless steel; the side wall of the filter screen body 3134 is a 100-350 mesh metal net, and the rest part of the preparation materials comprise temperature-resistant plastics. More specifically, in this embodiment, the mesh number of the metal mesh is 300 mesh, so as to ensure the best filtering effect.
The inventor finds that in actual production: (1) If the first magnet set 317 and the second magnet set 318 are both directly made of ring magnets, only repulsive force is generated therebetween, but there is no attractive force, so that although the suspension is facilitated, the rotary cutterhead 312 cannot be attached to the bottom of the inner side of the filter screen assembly 313 under any repulsive force; (2) If the first magnet set 317 and the second magnet set 318 are made of magnets of the same specification, when the grinding motor 12 works to rotate the rotary cutter disc 312, strong attractive force is generated between the magnets when the first magnet set 317 and the second magnet set 318 are dislocated, so that the grinding motor 12 cannot overcome the attractive force and the rotary cutter disc 312 is blocked easily, even if the rotary cutter disc 312 can rotate, repulsive force and attractive force are alternately generated in a dynamic state, so that repulsive force and attractive force cancel to be unfavorable for the rotary cutter disc 312 to "float" on the bottom inside the filter screen assembly 313.
Therefore, in the present invention, the first magnet group 317 includes a plurality of large magnets 3171 and a plurality of small magnets 3172, where the large magnets 3171 and the small magnets 3172 are spaced apart from each other and circumferentially distributed; the second magnet group 318 includes a plurality of large magnets 3181 and a plurality of small magnets 3182, where the large magnets 3181 and the small magnets 3182 are spaced from each other one by one and are circumferentially distributed uniformly; the magnets of the first magnet group 317 and the second magnet group 318 are uniformly distributed.
Wherein the purpose of the large magnets is to achieve dynamic "levitation" of the rotary cutterhead 312 by virtue of the repulsive forces between the opposing magnets; when the small magnets are arranged, on one hand, in order to ensure that the large magnet 3171 on the rotary cutter disc 312 and the small magnet 3182 on the filter screen assembly 313, the large magnet 3181 on the filter screen assembly 313 and the small magnet 3172 on the rotary cutter disc 312 are opposite to each other (namely, the large magnet 3171 on the rotary cutter disc 312 and the large magnet 3181 on the filter screen assembly 313 are mutually misplaced), on the other hand, when the large magnet 3171 on the rotary cutter disc 312 and the large magnet 3181 on the filter screen assembly 313 generate attractive force between the large magnet 3171 on the rotary cutter disc 312 and the large magnet 3181 on the filter screen assembly 313 so that the rotary cutter disc 312 can be placed at the bottom of the inner side of the filter screen assembly 313, on the other hand, in order to ensure that the large magnet 3171 on the rotary cutter disc 312 and the small magnet 3182 on the filter screen assembly 313, the large magnet 3181 on the filter screen assembly 313 and the small magnet 3172 on the rotary cutter disc 312 are opposite to each other (namely, the large magnet 3171 on the rotary cutter disc 312 and the large magnet 3181 on the filter screen assembly 313, the small magnet 3172 on the rotary cutter disc 312 and the small magnet 3182 on the filter screen assembly 313 are mutually misplaced), on the large magnet 3171 on the rotary cutter disc 312 and the small magnet 3182 on the filter screen assembly 313 generate attractive force between the large magnet 3171 on the rotary cutter disc assembly and the large magnet 3182 on the filter screen assembly 313 and the large magnet 3172 on the rotary cutter disc assembly and the small magnet 3172 on the filter disc assembly 313.
For example, to place the rotary cutterhead 312 in the filter assembly 313, the large magnet 3171 on the rotary cutterhead 312 and the small magnet 3182 on the filter assembly 313, the large magnet 3181 on the filter assembly 313 and the small magnet 3172 on the rotary cutterhead 312 are opposite to each other (i.e. the large magnet 3171 on the rotary cutterhead 312 and the large magnet 3181 on the filter assembly 313, the small magnet 3172 on the rotary cutterhead 312 and the small magnet 3182 on the filter assembly 313 are offset from each other), as shown in fig. 15, the attractive force between the large magnet 3172 on the rotary cutterhead 312 and the large magnet 3181 on the filter assembly 313 is slightly larger than the repulsive force generated between the large magnet 3171 on the rotary cutterhead 312 and the small magnet 3182 on the filter assembly 313, and in this state, the closer distance between the rotary cutterhead 312 and the filter assembly 313 is, the larger the attractive force between the same specification magnets is, so that the rotary cutterhead 312 can be placed in a static state due to the attractive force, i.e. the rotary cutterhead 312 can be attached to the bottom of the inner side of the filter assembly 313.
For example, when the grinding motor 12 works to rotate the rotary cutter head 312, if the large magnet 3171 on the rotary cutter head 312 and the large magnet 3181 on the filter screen assembly 313, the small magnet 3172 on the rotary cutter head 312 and the small magnet 3182 on the filter screen assembly 313 are opposite to each other, as shown in fig. 14, the rotary cutter head 312 and the filter screen assembly 313 form a repulsive state, and in a dynamic state, although the repulsive force and the attractive force are alternately generated, the overall repulsive force is greater than the overall attractive force, so that a dynamic suspension state is formed between the rotary cutter head 312 and the filter screen assembly 313, and further, the rotary cutter head 313 and the fixed cutter head 314 can perform a relative rotary motion smoothly, which is beneficial to ensuring uniformity of the thickness of the ground coffee powder.
Further analysis, it is theoretically possible that the upward repulsive force generated by the first magnet assembly 317 and the second magnet assembly 318 during grinding is slightly greater than the downward pressing force generated by crushing the coffee beans, so as to ensure that a suspension state is formed between the rotary cutter head 312 and the bottom inside the filter screen assembly 313. However, in a practical situation, the coffee beans are crushed with a certain randomness, and in an extreme case, a coffee bean can only be crushed at a specific point, but it is impossible to crush the ring along the whole cutter surface, at this time, the downward pressing force generated is concentrated at a certain point, and the upward repulsive force generated by the first magnet group 317 and the second magnet group 318 is relatively uniformly distributed on the whole cutter surface, so that the rotary cutter head 312 is caused to incline to contact with the annular ribs 3137 at the inner bottom of the filter screen main body 3134, and friction force is generated. Therefore, the levitation state due to the mutual repulsion of the magnets is relatively speaking, i.e. the sliding friction due to the contact of the rotary cutterhead 312 with the annular bead 3137 is still present during the grinding process.
However, assuming that there is no repulsive force generated by the first magnet group 317 and the second magnet group 318, the downward pressing force generated by crushing the coffee beans will fully act on the inner bottom of the filter mesh body 3134, thereby generating a very large sliding friction force, which adds a large load to the operation of the grinding motor 12, i.e. the grinding motor 12 must be operated with enough torque force to overcome the friction resistance. Even if the grinding motor 12 is sufficient to overcome the frictional resistance, the heat generated by friction will cause the device to rise in temperature during the grinding process, which will present a significant challenge to the wear and heat resistance of the device material.
It is therefore apparent that the repulsive force generated by the first magnet group 317 and the second magnet group 318 during the lapping process will greatly improve the above problems, namely: even if the rotary cutter head 312 is not suspended by 100%, the rotary cutter head 312 and the fixed cutter head 314 can perform relative rotary motion smoothly, so that uniformity of coffee powder obtained by grinding is ensured, friction force generated by contact between the rotary cutter head 312 and the filter screen assembly 313 is reduced to the minimum, requirements on wear resistance and heat resistance of preparation materials of equipment are greatly reduced, and manufacturing cost is reduced on the premise of ensuring service life of the equipment.
In the present embodiment, as shown in fig. 2, 7, 14 and 15, the first magnet group 317 includes 3 large magnets 3171 and 3 small magnets 3172, and the second magnet group 318 also includes 3 large magnets 3181 and 3 small magnets 3182, but in the present invention, the number of large magnets 3171, large magnets 3181, small magnets 3172 and small magnets 3182 is not limited to 3, and may be other numbers.
Wherein, the diameters of the large magnets 3171 and 3181 are 9-14 mm, and the thicknesses thereof are 2-7 mm; the small magnets 3172 and 3182 each have a diameter of 5 to 9mm and a thickness of 2 to 7mm. In this embodiment, the diameters of the large magnets 3171 and 3181 are 10mm and the thicknesses thereof are 3mm, in consideration of the specifications of the apparatus and the like; the small magnets 3172 and 3182 each had a diameter of 6mm and a thickness of 3mm.
In this embodiment, the large magnets 3171 and 3181 are made of a non-demagnetizing material having a temperature of 120 ℃ or higher, and the small magnets 3172 and 3182 are made of a non-demagnetizing material having a temperature of 120 ℃ or higher.
In this embodiment, as shown in fig. 10-13, a stop 3112 is disposed in the bean bin 311 near the feeding hole 316, for guiding coffee beans to fall into the feeding hole 316 and enter between the rotary cutterhead 312 and the fixed cutterhead 314 for grinding, and of course, a stop ring (not shown) may be disposed at the bottom of the bean bin 311, which is located at a position lower than the gap between the fixed cutterhead 314 and the rotary cutterhead 312, so as to prevent the coffee powder obtained by grinding from splashing directly onto the surface of the filter screen body 3134 (in this embodiment, specifically, the metal mesh surface), because, although the coffee powder does not substantially damage the surface of the filter screen body 3134, the adhesion of the splashed coffee powder on the surface of the filter screen body 3134 is extremely strong, which is unfavorable for cleaning after use.
In this embodiment, as shown in fig. 11, 24 and 25, a plurality of notches 3113 are provided on the inner side of the top end of the bean bin 311, and the hot water supply inlets 11 communicate with the inside of the bean bin 311. When the processing bucket 3 is mounted on the main machine 1, a first annular sealing ring 5 and a second annular sealing ring 6 are arranged in a gap between the processing bucket and the main machine; the first annular seal ring 5 and the second annular seal ring 6 are respectively positioned on the inner side and the outer side of the notch 3113. The purpose of the first annular sealing ring 5 is to ensure the sealing between the bean bin 311 and the corresponding position of the host 1, and more importantly, to guide the hot water to be annularly dispersed to a plurality of positions and enter the bean bin 311 through the gaps 3113, so that the coffee powder is uniformly brewed; the second ring seal 6 is provided to avoid overflow of hot water and water vapor from the gap between the processing funnel 3 and the main machine 1 during the coffee brewing process.
In this embodiment, the bean bin 311 is made of a temperature-resistant plastic, and the fixed cutter 314 is made of stainless steel or ceramic.
In this embodiment, as shown in fig. 24 to 29, the host 1 further includes a water tank 13, a water conduit 14, a heating component 15, a control circuit board 16, a reset temperature controller 17 for preventing dry heating, and a power connector 18;
The water tank 13 is communicated with the hot water inlet 11 through a water conduit 14, the heating component 15 is arranged on the water conduit 14, and a float valve (not shown in all figures) for controlling water flow is arranged on a channel of the water conduit 14; the reset temperature controller 17 is arranged on the heating component 15;
The power connector 18 is electrically connected with the control circuit board 16, and the grinding motor 12, the heating assembly 15 and the reset temperature controller 17 are electrically connected with the control circuit board 16.
In the present embodiment, the mounting of the processing bucket 3 to the main body 1 includes:
as shown in fig. 20-24, the inner wall of the outer bucket 32 is provided with a plurality of second grooves 326, and the side wall of the host 1 is provided with a plurality of second protruding parts 19; the shape and flow direction of each second groove 326 are towards the bottom of the outer bucket 32;
The outer wall of the outer bucket 32 is provided with a handle 327, and the upper surface of the handle 327 is provided with a locking limit groove 3271; the main machine 1 is provided with a spring ejector rod 110 with a vertical downward direction;
Each second groove 326 is respectively matched with each second protruding part 19 in a buckling way, and when the spring ejector rod 110 falls into the locking limit groove 3271, the processing bucket 3 is installed in place, so that stable and accurate assembly between the processing bucket 3 and the host 1 is ensured.
In the present embodiment, as shown in fig. 23 and 29, the host 1 is provided with a hall sensor 111 electrically connected to the control circuit board 16; the upper part of the handle 327 is provided with an induction magnet 3272; when the processing bucket 3 is in place, the sensing magnet 3272 corresponds to the hall sensor 111 and is fed back to the control circuit board 16, so that the control circuit board 16 controls the grinding motor 12 to work, and the intelligent grinding machine is realized.
In this embodiment, as shown in fig. 24 and 25, the host 1 is provided with a plurality of illumination lamps 112 for illuminating the interior of the processing bucket 3, and each illumination lamp 112 is electrically connected to the control circuit board 16; each illuminating lamp 112 is provided with a lamp shade 1121 outside, and an O-shaped sealing ring 7 is arranged between each lamp shade 1121 and the host computer 1 to prevent water vapor from entering the lamp shade 1121 in the coffee brewing process and damaging the illuminating lamp 112.
In order to facilitate a better understanding of the present invention, a description will be given below regarding a use procedure of the ground coffee machine according to the present embodiment:
(1) Preparation stage before grinding:
Firstly, the large magnet 3171 on the rotary cutterhead 312 and the small magnet 3182 on the filter screen assembly 313 are adjusted to be opposite to the large magnet 3181 on the filter screen assembly 313 and the small magnet 3172 on the rotary cutterhead 312 so as to enable the rotary cutterhead 312 to rest in the filter screen assembly 313; then, screwing the bean bin 311 into the filter screen assembly 313 according to the grinding thickness requirement of the coffee powder, and sleeving the bean bin 311 on the periphery of the transmission shaft 3126 of the rotary cutter head 312; then, after the whole grinding brewing bucket 31 is put into the outer bucket 32, the first limit mark 31111 is adjusted to correspond to the second limit mark 3231, so that the bean bin 311 is limited to rotate by the outer bucket 32, and the first rotary mark 31112 is adjusted to correspond to one of the second rotary marks 3131, so that the filter screen assembly 313 is limited to rotate by the outer bucket 32, so that the assembly work of the processing bucket 3 is completed.
(2) Grinding stage (as shown in fig. 24):
firstly, pouring a proper amount of coffee beans into a bowl-shaped bean bin 311; then the processing bucket 3 is mounted on the main machine 1, namely, each second groove 326 is respectively matched with each second protruding part 19 in a buckling way, the spring ejector rod 110 falls into the locking limit groove 3271, and the coupling head 3121 on the rotary cutter head 312 is ensured to be coupled with the power shaft of the grinding motor 12;
Then, the coffee cup 2 is arranged below the processing hopper 3, so that the coffee liquid outlet 321 is communicated with the interior of the coffee cup 2; finally, the grinding motor 12 is started to grind the coffee beans in the bean bin 311.
(3) Brewing phase (as shown in fig. 25):
when coffee beans are ground, the ground coffee powder enters the filter screen assembly 313, at the moment, the grinding motor 12 stops running, then the heating assembly 15 starts working, and generated hot water sequentially enters the bean bin 311 through the water guide pipe 14 and the hot water inlet 11 and then enters the filter screen assembly 313 through a gap between the rotary cutter head 312 and the fixed cutter head 314; after the hot water is fully contacted with the ground coffee powder, the coffee liquid is extruded by the steam pressure to pass through the side wall of the filter screen main body 3134 and then enter the outer bucket 32, and finally the coffee liquid flows into the coffee cup 2 through the drip valve 322, so that the coffee beverage is finally manufactured.
Other details of the disclosed ground coffee machine are referred to in the prior art and are not described in detail herein.
Example 2
This example discloses another coffee grinder, which differs from the coffee grinder described in example 1 in that:
in the coffee grinder, a limiting mechanism for limiting the shaking of the rotary cutter head 312 is arranged at the joint of the rotary cutter head 312 and the filter screen assembly 313, and the specific structural form of the limiting mechanism comprises:
as shown in fig. 30, a first groove 3128 is formed at one end of the rotary cutter head 312 connected to the filter screen assembly 313, and a first protrusion 3138 is formed at the bottom of the inner side of the filter screen assembly 313; when the processing bucket 3 is mounted on the main machine 1, the first protruding portion 3138 and the first groove 3128 cooperate with each other, that is, point contact is formed between the rotary cutter head 312 and the filter screen assembly 313, thereby realizing centering of the rotary cutter head 312 and effectively limiting shaking of the rotary cutter head 312 during rotation.
Other matters of the ground coffee machine disclosed in this embodiment are identical to those of the ground coffee machine described in embodiment 1, and will not be described in detail herein.
The present invention is not limited to the preferred embodiments, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention will still fall within the scope of the technical solution of the present invention.