CN218186340U - Quantitative bean grinding device and bean grinding coffee machine - Google Patents

Abstract

The utility model discloses a ration grinds beans device and grinds beans coffee machine belongs to the beverage and dashes the bubble electrical apparatus, and current coffee beans device and the method of grinding is detained not the coffee beans that grind in the crushing system after stopping grinding, the utility model discloses a calculate the speed that the crushing system ground coffee powder to combine the total capacity of the coffee powder that the powder bowl corresponds, thereby calculate and grind the total time of grinding or the surplus grinding time of accomplishing coffee powder total capacity in order to empty crushing system. The crushing system can be emptied and the idling of the crushing system is avoided. When actually grinding coffee beans, as long as adjust the size of grinding the clearance, store the coffee beans in storage and unloading system, confirmed the thickness of coffee powder, the variety of coffee beans, the dry degree of coffee beans promptly, the foundation the utility model discloses a scheme always can empty crushing system automatically, shuts down to the right, avoids crushing system idle running.

Description

Quantitative bean grinding device and bean grinding coffee machine

Technical Field

The utility model belongs to electrical apparatus is steeped to the beverage, concretely relates to ration grinds beans device and grinds beans coffee machine for confirm the grinding volume and the operating time of coffee powder by oneself according to the size of powder bowl, the thickness degree of coffee powder, empty the coffee beans that are not ground who is detained in smashing the system.

Background

At present, the powder distribution, powder pressing and quantitative method of the coffee bean grinding device on the market comprises the following steps:

the first method is visual quantification, which requires manual intervention for powder distribution, powder compaction and quantification. The method has low cost, but has obvious defects as follows: residual coffee powder is arranged in the coffee powder flow passage, so that each cup of coffee is not 100% of freshly ground coffee powder, and the optimal taste is difficult to obtain; coffee quality consistency is poor as dosing, dusting are dependent on personal level.

The second method is time quantification, artificial powder distribution and powder pressing, and the method takes time as the only variable in quantification, does not consider the influence of factors such as thickness, variety, baking degree and the like, and is improved compared with the first method. The method has the defects that the coffee bean variety needs to be debugged again when being replaced, so that the waste of coffee powder is caused, meanwhile, the powder distribution and pressing aspects still depend on personal level, and the method does not provide a solution for the problem that residual coffee powder exists in a coffee powder flow passage.

The third method is time-based, intelligent powder compaction. This method is quantitatively the same as the second method, but gives a more consistent quality of coffee than the second method, since it provides a constant force for compacting the coffee powder. The defect is that the coffee bean variety needs to be debugged again when being replaced, which causes waste of coffee powder. Meanwhile, only a compaction process is needed, a powder distribution process is lacked, and the method is difficult to say perfect. This method does not provide a solution to the problem of unground coffee beans being trapped in the pulverizing system and to the problem of residual coffee powder in the coffee powder flow path.

The fourth method is to rotate the powder, automatically compact and quantify the load. The product is provided with two motors, one motor is used for crushing, and the other motor is used for distributing and compacting the powder. The method adopts the steps of rotating powder distribution, synchronizing powder distribution and extrusion, stacking layer by layer, and stopping the coffee bean grinding device when the load reaches the set threshold value of the powder distribution and compaction motor. Compared with the first three methods, the device provides a nearly perfect solution of quantification, powder distribution and compaction, the operation process is automatic, and the prepared coffee has better quality and higher stability. The coffee grinder has the advantages that two sets of transmission devices are used, the cost is high, the problem that unground coffee beans are retained in a grinding system and the problem that residual coffee powder is retained in a coffee powder flow passage are not solved, the residual coffee powder and the retained coffee beans are affected with damp and even go bad, and the quality and the taste of coffee beverage are further influenced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model and the technical task that provides overcome the defect that the coffee bean problem of not grinding is detained in the system of smashing after stopping grinding that current coffee bean device and method exist, provide ration and grind beans device and grind beans coffee machine for according to the size of powder bowl, the thickness degree of coffee powder confirm the grinding volume and the operating time of coffee powder by oneself, empty the coffee bean of not grinding that is detained in the system of smashing. And further cleaning the residual coffee powder in the coffee powder flow passage.

In order to achieve the above object, the utility model discloses a quantitative bean grinding device, characterized by includes:

a storage and feeding system for storing and feeding down coffee beans;

a grinding system for grinding and grinding the delivered coffee beans;

the filling and quantifying system comprises a transmission shaft, a powder pressing wheel, a first inductive switch and a replaceable powder bowl, wherein the powder bowl is positioned below the crushing system, the powder pressing wheel is positioned in the powder bowl and is rotated by power transmitted by the transmission shaft to compact coffee powder in the powder bowl and simultaneously raise the position of the coffee powder in the powder bowl, the first inductive switch is used for sensing a first position and a second position when the powder pressing wheel is raised in the powder bowl, the first position corresponds to a first capacity position where the coffee powder is accumulated in the powder bowl, the second position corresponds to a second capacity position where the coffee powder is accumulated in the powder bowl, and the capacity difference of the coffee powder accumulated from the first capacity position to the second capacity position in the powder bowl is a second capacity;

and the control system is used for controlling the storage and blanking system, the crushing system and the filling and quantifying system to cooperatively act, recording a second time period required by the first inductive switch to induce the powder pressing wheel to rise from the first position to the second position in the powder bowl, determining the grinding speed according to the second capacity and the second time period, and determining the total grinding time or the residual working time of the crushing system according to the grinding speed so as to empty the crushing system.

Since the size of the bowl is determined during the grinding operation, the difference in the volume of coffee powder deposited in the bowl from the first volume position to the second volume (i.e. the second volume) is determined, i.e. the second volume is a constant; however, when coffee beans are actually ground, due to the fact that grinding speeds are different due to different factors such as the size of grinding gaps, the variety of the coffee beans and the dryness of the coffee beans, the control system records a second time period required by the first inductive switch to induce the powder pressing wheel to rise from the first position to the second position in the powder bowl, and then the speed for grinding the coffee powder can be calculated; and then the total amount of the ground coffee powder and the required time can be determined according to the speed and the size of the powder bowl, and the material storage and discharge system is closed after the grinding system is emptied.

Specifically, in order to uniformly distribute and compact the coffee powder and to raise the coffee powder along with the accumulation of the coffee powder in the powder bowl, the powder pressing wheel is provided with inclined vanes, and the vanes are lifted by the coffee powder in the powder bowl when the powder pressing wheel rotates.

Particularly, the transmission shaft is vertically arranged in a floating mode, and the powder pressing wheel is fixedly connected to the lower end of the transmission shaft. Thereby the powder pressing wheel pushes the transmission shaft to rise. In addition, in order to enable the first inductive switch to accurately detect signals and avoid the influence caused by coffee powder, the first inductive switch is positioned above the powder bowl, and the transmission shaft is provided with a first position structure corresponding to the first position and a second position structure corresponding to the second position, which are used for triggering the first inductive switch. The first induction switch is a photoelectric switch, the first position structure and the second position structure are arranged on the ring groove on the transmission shaft, and the photoelectric switch corresponds to the ring groove and sends signals to the control system.

And the crushing system comprises a power output end, and the transmission shaft and the power output end are inserted together to realize the vertical floating.

In specific implementation, the transmission shaft can be vertically positioned, and the powder pressing wheel is assembled on the transmission shaft in a floating manner. The powder pressing wheel moves upwards along the transmission shaft when being lifted by the pushed coffee powder.

In a preferred embodiment, the edge of the vane is provided with a flexible part contacting the inner wall of the powder bowl. In the process of compacting the coffee powder by the powder pressing wheel, the flexible part can scrape off fine dust attached to the inner wall of the powder bowl, and the powder bowl is kept clean.

In order to prepare coffee beverages with different volumes, the powder bowls comprise at least two powder bowls with different specifications, the volumes of the powder bowls with different specifications are different corresponding to the parts below the first position, and the volumes of the powder bowls with different specifications are the same corresponding to the parts above the first position. Therefore, the powder bowls with different specifications and capacities can be selected to prepare coffee beverages with different capacities. Moreover, because the capacities of the parts of the powder bowls with different specifications corresponding to the positions above the first position are the same, after the powder bowls with different specifications are replaced, the capacities of the coffee powder corresponding to the parts above the first position are the same, and accordingly, the residual grinding time can be determined according to the grinding speed.

In a preferred scheme, the powder bowl is replaceably arranged in a filter, the filter is detachably assembled on a retainer, and the transmission shaft extends from the upper part of the retainer to the powder bowl; the transmission shaft or the powder pressing wheel is vertically limited, so that the transmission shaft and the powder pressing wheel are kept at the assembling position when the powder bowl is disassembled from the retainer along with the filter. Therefore, when the powder bowl is replaced, the powder pressing wheel can be kept in the original position, and the powder bowl is not separated from the transmission relation along with the removal of the powder bowl, so that the operation is facilitated.

In particular, the device is provided with a second inductive switch which provides a standby signal for the control system when the filter is mounted in the holder. This ration grinds beans device disposes third inductive switch, after storage and unloading system installation target in place the third inductive switch for control system provides standby signal. The standby signal represents that the quantitative bean grinding device is in a state capable of starting to work, otherwise, the quantitative bean grinding device is incapable of starting to work.

In order to empty the grinding system of the remaining non-ground coffee beans, it is necessary to close the storage and discharge system at the right moment, and therefore the storage and discharge system is provided with a normally closed door which is driven open by a drive device which is controlled by the control system.

Moreover, in order to close and open the doors rapidly, the storage and blanking system is provided with a storage box which is provided with a bottom surface which is provided with a blanking port, and the two doors are symmetrically and slidably assembled on the bottom surface and used for opening or closing the blanking port.

Particularly, a section of cylinder is arranged below the feed opening, a rotatable gear is sleeved on the cylinder and is meshed with the gear to configure two racks, the two racks are respectively arranged on two sides of the gear, the two doors are connected with the racks one by one to enable the two doors to be close to each other synchronously or to be far away from each other to open the feed opening, and the driving device drives the doors to open through the linear movement of one rack.

Furthermore, for the compact structure, the door is located on the upper side of the bottom surface, the bottom surface has a long hole, the door is connected with the rack through a rod penetrating in the long hole, the long hole provides a moving space for the rod when the rod moves along with the rack and the door, and the rod is guided in the long hole.

In order to guide the door to be smoothly opened and closed, the bottom surface is provided with a guide strip, and the door is guided by the guide strip.

In order to keep the feed opening in a normally closed state, a spring is connected to the door, and the elastic force of the spring urges the door to close the feed opening.

In order to adjust the thickness degree of the coffee powder, the grinding system comprises a movable grinding wheel and an adjustable grinding wheel which are positioned in the bean grinding chamber, the movable grinding wheel is driven by a bean grinding motor through a transmission device, and the adjustable grinding wheel adjusts the gap between the adjustable grinding wheel and the movable grinding wheel through an adjusting ring.

In order to achieve the above purpose, the utility model discloses a grind beans coffee machine, characterized by: dispose on the fuselage the utility model discloses a quantitative bean grinding device is used for grinding the coffee powder and the empty crushing system that correspond the capacity of powder bowl.

The utility model discloses a calculate the speed that the grinding system ground coffee powder to combine the total capacity of the coffee powder that the powder bowl corresponds, thereby calculate and grind the grinding total time or the surplus grinding time of accomplishing coffee powder total capacity in order to empty the grinding system. The crushing system can be emptied and the idling of the crushing system is avoided. When actually grinding coffee beans, as long as adjust the size of grinding the clearance, store the coffee beans in storage and unloading system, confirmed the thickness of coffee powder, the variety of coffee beans, the dry degree of coffee beans promptly, the foundation the utility model discloses an automatic crushing system that empties of scheme total energy is shut down just right, avoids crushing system idle running, and degree of automation is good.

The utility model discloses, equally through rotatory cloth powder, automatic compaction, nevertheless pack and ration system's transmission shaft and the power take off end cartridge of crushing system, the transmission shaft obtains power from grinding the beans motor, has simplified the power structure.

The utility model discloses, confirm the capacity of coffee powder through the position and the default of pressure powder wheel, to the powder bowl of arbitrary specification, the homoenergetic obtains the accurate coffee powder of capacity and the compaction degree of coffee powder, can make a coffee beverage of high quality, stability in view of the above.

Furthermore, the utility model provides a detain the problem of the coffee beans that does not grind in crushing system and the remaining coffee powder problem in the coffee powder runner, avoid remaining coffee powder and the coffee beans that are detained to wet and deteriorate even and influence the quality and the taste of coffee beverage.

Drawings

FIG. 1 is a perspective view of the quantitative grinding device of the present invention;

FIG. 2 is a schematic front view of the quantitative grinding apparatus shown in FIG. 1;

FIG. 3 isbase:Sub>A sectional view taken along line A-A of FIG. 2;

FIG. 4 is a sectional view taken along line B-B of FIG. 2;

FIG. 5 is a sectional view taken along line C-C of FIG. 2;

FIG. 6 is an exploded view of the quantitative milling device shown in FIG. 1;

FIG. 7 is a schematic view from another perspective of the structure shown in FIG. 6;

fig. 8 is an exploded view of the material storage and discharge system of the present invention;

FIG. 9 is a schematic view from another perspective of the structure shown in FIG. 8;

fig. 10 is an exploded view of the transmission shaft of the present invention engaged with the output end of the crushing system;

FIG. 11 is a schematic view from another perspective of the structure shown in FIG. 10;

fig. 12 is a schematic view of an assembly relationship of the transmission shaft, the powder pressing wheel, the first inductive switch and the second inductive switch of the present invention;

FIG. 13 is a schematic view from another perspective of the structure shown in FIG. 12;

FIG. 14 is a schematic view of the accumulation of ground coffee in a powder bowl over time according to the apparatus, method of the present invention;

FIG. 15 is a schematic view of the quantitative bean grinding apparatus of FIG. 1 applied to a coffee bean grinder;

the reference numbers in the figures illustrate:

10 machine body, 20 quantitative bean grinding device;

100 a material storage and discharge system;

110 storage cases, 111 bottom surfaces, 112 feed openings, 113 cylinders, 114 long holes, 115 guide strips, 116 bottom covers, 117 connecting clamping grooves, 118 ribs, 119 top covers, 120 safety covers,

120 door, 121 drive, 122 rod, 123 spring,

the gear wheel 131, the rack gear 132,

k3, a third inductive switch;

200, crushing system:

210 at the end of the power take-off,

220 bean grinding chamber, 221 shell, 222 powder falling channel, 223 hook, 224 gap,

230 moving grinding wheel, 231 blind hole

240 an adjustable grinding wheel, which is,

a 250 bean grinding motor for grinding the bean,

260 transmission device, 261 final gear, 262 torsion transmission block, 263 insertion space, 264 worm, 265 worm wheel, 266 cleaning part,

271 adjusting ring, 272 threaded sleeve, 273 lifting sleeve, 274 arm, 275 end sleeve, 276 guide sleeve,

280 powder outlet impellers, 281 torsion transmission columns, 282 columns,

290 a structural member;

300 filling and dosing system:

310, 311, 312, 313, 314, a hexagonal blind hole,

320 powder pressing wheel, 321 vane wheel, 322 notch,

a powder bowl (330) is arranged in the powder bowl,

340, a filter, 341 ear portions,

350 holder, 351 telescopic rod, 352 spring and 353 spiral groove

K1, a first inductive switch is arranged on the first inductive switch,

k2 second inductive switch.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the accompanying drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The terms "comprises" and "comprising," and any variations thereof, in the description and claims of the present invention are intended to cover a non-exclusive inclusion, such that a method or article of manufacture that comprises a list of features is not necessarily limited to those features expressly listed, but may include other features not expressly listed that may be included in the method or article of manufacture.

In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of description of the present invention and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the technical features defined by the terms "first", "second", etc. have sequential concepts, and the defined technical features are only clearly distinguished from other technical features for clearly describing the defined technical features, but do not represent such naming in actual implementation, and therefore, cannot be construed as limiting the present invention.

The present invention will be described in detail with reference to the following embodiments and accompanying drawings.

Figures 1-3 and 6-7 show in different forms a quantitative milling device of one construction. This ration grinds beans device includes: the system comprises a material storing and discharging system 100, a crushing system 200, a filling and quantifying system 300 and a control system. The storage and feeding system 100 is used to store and deliver coffee beans to the lower pulverizing system 200. The grinding system 200 is used to grind and grind coffee beans being delivered. The filling and dosing system 300 is adapted to receive and dose coffee grounds from the grinding system 200. The control system is used for controlling the storing and blanking system 100, the pulverizing system 200 and the filling and dosing system 300 to cooperate, so that the control system is embodied as a control circuit, such as a PCB, not shown in the figure.

As shown in fig. 4-5 and 8-9, the stocking and blanking system 100 is provided with a normally closed door 120 for storing coffee beans in the stocking and blanking system. The door 120 is driven to open by a driving device 121, which is controlled by a control system, so that the control system controls the driving device to open the door at the right time. Specifically, the storing and feeding system 100 has a storage case 110, the storage case 110 has a bottom surface 111, the bottom surface 111 has a feeding opening 112, and two doors 120 are symmetrically slidably mounted on the bottom surface 111 for opening or closing the feeding opening. Furthermore, the edge of the discharge opening 112 extends downward to form a section of cylinder 113 below the discharge opening 112, a rotatable gear 131 is disposed on the cylinder 113, two racks 132 are disposed in engagement with the gear, the two racks 132 are disposed on two sides of the gear 131, and the doors 120 are connected to the racks 132 one by one so that the two doors can be synchronously close to each other to close the discharge opening or be away from each other to open the discharge opening. Furthermore, the driving device 121 drives the door to open through the linear movement of a rack, so that the driving device preferably adopts a power output mode of generating axial motion, such as an electromagnet, a linear motor, a water pump hydraulic drive and the like, and can also be a crank slide block mechanism, a cam mechanism and the like. The door 120 is located on the upper side of the bottom surface 111, the bottom surface 111 has a long hole 114, and the door 120 is connected to a rack 132 via a rod 122 inserted in the long hole. The rod 122 is made integral with the door 120 and is connected to the rack. In specific implementation, the rod can be integrated with the gear and connected with the door. The upper side of the bottom surface 111 is provided with a pair of guide bars 115, and the edge of the door 120 laterally contacts the guide bars 115 to be guided by the guide bars. The door 120 is connected with a spring 123, and the elastic force of the spring urges the door to close the feed opening. In order to avoid the interference of the gear and the rack by external factors, a bottom cover 116 is connected below the bottom surface 111 to shield the gear and the rack. Moreover, the cylinder may be provided on the bottom cover. Whether the cylinder is provided at the bottom cover or the bottom surface, it constitutes a passage for coffee beans to fall from the feed opening into the grinding system. Furthermore, in order to facilitate the addition of coffee beans to the cartridge, the cartridge is removably mounted to the body of the coffee maker so as to be removed from the body for the addition of coffee beans. As shown in the figure, the outer wall of the storage box is provided with a connecting clamping groove 117, when the storage box is to be installed on the machine body, the storage box is arranged on the machine body, the storage box can be clamped with the clamping protrusion, not shown in the figure, of the machine body through the connecting clamping groove 117 by rotating the storage box, the storage box is fixed on the machine body, and the storage box is in a standby state. In addition, this ration mill beans device disposes third inductive switch K3, and third inductive switch K3 is fixed in the fuselage, is equipped with rib 118 at the outer wall of storage box, and when being in standby state with storage box fixed in the fuselage, namely after storage and unloading system installation put in place, third inductive switch K3 is touched by rib 118, provides standby signal for control system. In addition, the storage case is manufactured as an assembly structure, and further comprises a top cover 119 and a safety cover 120. The top cover 119 covers the top of the magazine and facilitates removal. The safety cover 120 is assembled inside the storage box and corresponds to the feeding opening 112, and is used for guiding coffee beans to slide down to the feeding opening and preventing the coffee beans from being blocked at the feeding opening and closing the barrier door.

As shown in fig. 10-11, in conjunction with fig. 1-3 and 6-7, the upper end of the grinding system 200 interfaces with the lower end of the hopper and blanking system 100 for receiving coffee beans. Specifically, the pulverizing system 200 includes a bean grinding motor 250, a transmission 260, a housing 221, a flour discharge impeller 280, a movable grinding wheel 230, an adjustable grinding wheel 240, and an adjusting mechanism. A bean grinding chamber 220 is formed in the housing 221, and a powder dropping port is formed at the bottom edge of the bean grinding chamber 220 and extends downwards to form a powder dropping channel 222. At the lower end of the grinding chamber 220, a structure 290 is connected, which maintains an installation space with the housing 221 and in which a transmission is arranged. The transmission device is a structure combining worm and gear transmission. The upper end of the final gear 261 of the transmission device is provided with three evenly distributed torque transmission blocks 262, an insertion space 263 is kept between the adjacent torque transmission blocks 262, and the final gear 261 of the transmission device is provided with a transmission rod which extends downwards and is in a hexagonal prism shape and is used as a power output end 210. The bean grinding motor 250 is located outside the installation space, and the power of the bean grinding motor 250 is transmitted to the worm gear 265 through the worm 264 and then transmitted to the speed reduction gear set through the worm gear. The powder discharging impeller 280 is located at the bottom of the bean grinding chamber 220 and is inserted into an insertion space 263 between the torque transmission blocks through a torque transmission post 281 at a lower end thereof so as to be rotated together with the final gear 261. Moreover, the edge of the powder outlet impeller 280 is provided with a cleaning part 266, when the powder outlet impeller rotates, the cleaning part cleans the coffee powder in the bean grinding chamber into the powder falling port, so that the coffee powder falls into the powder bowl through the powder falling port and the powder falling channel. The movable grinding wheel 230 is conical and is positioned in the bean grinding chamber 220, the lower end surface of the movable grinding wheel 230 is provided with three blind holes 231, the upper end of the powder outlet impeller 280 is provided with three columns 282, the three columns 282 are inserted into the corresponding blind holes 231 one by one to realize the assembly of the movable grinding wheel and the powder outlet impeller, and the movable grinding wheel can rotate along with the powder outlet impeller. The adjustable grinding wheel 240 is in a sleeve shape and is sleeved outside the movable grinding wheel, and is located in the bean grinding chamber together with the movable grinding wheel. The adjustable grinding wheel 240 and the movable grinding wheel 230 maintain a gap therebetween for grinding coffee beans, and the size of the gap determines the thickness of ground coffee powder. The size of the gap is thus adjusted by adjusting the position of the adjustable grinding wheel relative to the moving grinding wheel. This adjustment is achieved by means of an adjustment mechanism. The adjusting mechanism comprises an adjusting ring 271, a threaded sleeve 272 and a lifting sleeve 273. The adjusting ring 271 is rotatably fitted on the housing 221 and hooked by the hook 223 so as not to be disengaged from the housing. The adjusting ring 271 has a gear on its outer periphery for engaging with an adjusting knob, not shown, provided on the body through the gear, and the adjusting knob is rotated to bring the adjusting ring into rotation. A threaded sleeve 272 is fitted inside the adjusting ring 271 so as to be rotatable therewith, and the inner wall of the threaded sleeve 272 is internally threaded. In the structure shown in the figure, the adjusting ring and the thread sleeve are arranged in a split structure for the convenience of assembly, and the adjusting ring and the thread sleeve can be integrally manufactured during specific implementation without discharging. The lifting sleeve 273 is in the form of a sleeve having radially extending arms 274 at its periphery, the arms 274 being located in notches 224 formed in the side wall of the housing and being restrained from rotation, the arms 274 also being in threaded engagement with the internal threads of the threaded sleeve 272, whereby the arms of the lifting sleeve can slide along the internal threads to be raised or lowered as the sleeve is rotated with the adjustment ring. Based on aforementioned adjustment mechanism, with adjustable emery wheel fixed assembly to the lift cover, can adjust the height of adjustable emery wheel through rotating the adjust knob, adjust adjustable emery wheel and move the clearance between the emery wheel. The fixed mounting of the adjustable grinding wheel to the lifting sleeve is achieved by means of an end sleeve 275 which remains mounted with the lifting sleeve. Further, to guide the coffee beans into the grinding chamber, the borrower's end housing is also provided with a guide sleeve 276, the guide sleeve 276 being open upwardly. Furthermore, in structural manufacture, the shell, the structural member, may be part of the relevant structural member of the fuselage.

As shown in fig. 1-3, 6-7, and 12-13, the filling and dosing system 300 includes a holder 350, a filter 340, a drive shaft 310, a dust wheel 320, a first sensor switch K1, and a replaceable powder bowl 330. The holder 350 is in a fixed position, such as fixed to the body of the coffee maker.

The holder 350 is a frame that serves as a mounting base for other components of the filling and dosing system. It may thus be part of the relevant structural element of the fuselage or it may be a separate structural element fitted to the fuselage. Moreover, a second inductive switch K2 and a vertical telescopic rod 351 are arranged on the holder 350, and the telescopic rod 351 is far away from the second inductive switch K2 under the action of the elastic force of the spring 352.

The filter preferably has a filtering function, which is realized by arranging a filter screen. When the powder bowl is specifically implemented, the filtering function of the filter can be realized due to the micropores, and the filtering function of the filter can not be given. In either configuration, the filter is more useful for receiving replaceable bowls. The filter 340 is detachably coupled to the holder 350, as by the ears 341 of its edge engaging the spiral grooves 353 of the holder's inner wall. When the filter is mounted on the holder, the ear 341 is lifted along the spiral groove 353, pushing the telescopic rod 351 to move upwards, and the telescopic rod 351 triggers the second inductive switch K2, and the second inductive switch K2 provides a standby signal for the control system.

The powder bowl 330 includes at least two, such as three sizes. When grinding coffee grounds, any one of the grounds bowls is placed in the strainer 340, the bowl is placed with the strainer in the holder below the pulverizing system 200 to receive the coffee grounds. When the powder bowls are placed in the filter 340, the powder bowls with different specifications have different capacities corresponding to the parts below the first position and have the same capacity corresponding to the parts above the first position, so that the powder bowls with the three specifications, namely the large, the medium and the small, have different total capacities. When coffee powder is ground, the powder bowl with required volume can be arranged in the filter according to the requirement to brew coffee beverages with different volumes, so that the powder bowl can be replaced according to the requirement.

The driving shaft 310 is a cylindrical shaft which extends downward through the holder from the upper side of the holder 340 toward the powder bowl 330 and thus can rotate relative to the holder. The transmission shaft 310 is provided with an annular edge 313, the annular edge 313 is positioned on the upper side of the retainer 340 and is limited vertically to block the transmission shaft from separating from the retainer downwards, so that the transmission shaft is kept at the working position, and the transmission shaft and the powder pressing wheel are kept at the assembling position when the powder bowl is detached from the retainer along with the filter.

The upper end of the driving shaft 310 has a hexagonal blind hole 314, and a hexagonal prism-shaped driving rod as the power output end 210 of the pulverizing system is inserted into the hexagonal blind hole 314 to realize power transmission, and the driving shaft can axially move relative to the driving rod, thereby realizing a vertical floating configuration of the driving shaft. Two ring grooves are also formed on the transmission shaft as a first position structure 311 and a second position structure 312. The first position structure corresponds to a first position when the powder pressing wheel rises in the powder bowl, and the second position structure corresponds to a second position when the powder pressing wheel rises in the powder bowl.

In the illustration, the dust wheel 320 is in the form of a fan blade of an axial fan having angled vanes 321. The powder pressing wheel 320 is fixedly connected to the lower end of the transmission shaft 310. Therefore, the powder pressing wheel is positioned in the powder bowl and rotates by virtue of power transmitted by the transmission shaft, the powder pressing wheel is used for compacting coffee powder in the powder bowl when rotating, and meanwhile, the wheel blade is lifted by the coffee powder in the powder bowl to lift the position of the powder pressing wheel in the powder bowl. In addition, a flexible part such as silicone rubber is arranged at the edge of the wheel blade to contact the inner wall of the powder bowl to clean the inner wall of the powder bowl, and the edge of the wheel blade in the figure shows a notch 322 for arranging the flexible part.

Although the floating of the powder pressing wheel is realized by the floating of the transmission shaft 310, in a specific implementation, the transmission shaft can be vertically positioned and assembled on the transmission shaft in a floating manner. In this case, the first position structure and the second position structure may be provided to the dust pressing wheel.

First inductive switch K1 is used for responding to first position and the second position when the powder pressing wheel risees in the powder bowl, and first position corresponds the first capacity position that coffee powder piled up in the powder bowl, and the second capacity position that coffee powder piled up in the powder bowl is corresponded to the second position, and the capacity difference that coffee powder piled up the second capacity position from first capacity position in the powder bowl is second capacity V2. The first inductive switch K1 is a photoelectric switch having a transmitting end and a receiving end opposite to each other, and the transmitting end and the receiving end are shielded by the transmission shaft for most of the time period and cannot receive the signal transmitted from the transmitting end by the receiving end. And when the photoelectric switch corresponds to the ring groove, a signal is sent to the control system. The first inductive switch K1 is mounted on top of the holder 350 above the powder bowl 330. When the transmission shaft 310 is lifted, only when the two ring grooves serving as the first position structure and the second position structure respectively correspond to the transmitting end and the receiving end, the ring grooves provide a channel for the transmitting end to transmit signals to the receiving end, and the first inductive switch K1 is triggered and sends signals to the control system.

The control system is used for controlling the storage and blanking system, the crushing system and the filling and quantifying system to cooperatively act, and is also used for recording a second time period t2 required by the first inductive switch K1 to induce the powder pressing wheel to rise from a first position to a second position in the powder bowl, and signals sent to the control system when the photoelectric switch corresponds to two ring grooves serving as a first position structure and a second position structure are respectively used as a starting point and an ending point of the second time period t 2. The control system determines the grinding speed according to the second volume V2 and the second time period t2, and determines the total grinding time or the remaining working time of the crushing system S2 from the grinding speed to empty the crushing system.

Because the different powder bowls of specification correspond the capacity difference of the part below the first position, the different powder bowls of specification correspond the capacity of the part above the first position the same, therefore, when the ration grinds beans device crocus, no matter what kind of specification's powder bowl chooses for use, rise to the first position before the crocus wheel, the ration grinds beans device can last the crocus, and rise to the first position after from the crocus wheel, the different powder bowls of specification correspond the capacity of the part above the first position the same, can confirm surplus crocus time according to crocus speed in view of the above, thereby can realize the unified control after the first position.

The quantitative bean grinding device is realized or embodied by the following quantitative bean grinding method, and the quantitative bean grinding method comprises the following continuous steps:

(1) The device automatically detects the initial positions of the material storing and discharging system and the filling and quantifying system, determines that the material storing and discharging system and the filling and quantifying system are installed in place, and then enters a standby state;

starting the quantitative bean grinding device: the grinding switch is turned on, the door 120 of the storage and discharge system is opened, and the coffee beans enter the bean grinding chamber 220 of the grinding system; the bean grinding motor 250 is started, the control system starts to time, the grinding system grinds coffee beans, and the coffee powder is pushed to the powder outlet by the powder outlet impeller 280 and falls towards the powder bowl 330; the coffee grounds fall into the powder bowl 330 and accumulate and are compacted in the powder bowl by the powder pressing wheel.

(2) As the coffee powder in the powder bowl 330 gradually accumulates, the coffee powder pushes the powder pressing wheel 320 and the transmission shaft 310 to move upwards until the coffee powder is accumulated to a first capacity position in the powder bowl, an annular groove serving as a first position structure 311 is raised to the first position and corresponds to the first inductive switch K1, the first inductive switch K1 generates and outputs a first signal to the control system, the control system records a first total grinding duration T1, a first time period T1 consumed in the step is equal to the first total grinding duration T1, and the coffee powder in the powder bowl is a first accumulated capacity VA, that is, the amount V1 of the ground coffee powder in the step. Different volumes of the powder bowls, and the first accumulation volume is different.

(3) The bean grinding motor 250 continuously works, coffee powder in the powder bowl 330 continues to accumulate, the coffee powder continues to push the powder pressing wheel and the transmission shaft to move upwards until the coffee powder is accumulated to a second capacity position in the powder bowl, an annular groove serving as a second position structure 312 is lifted to a second position and corresponds to the first inductive switch K1, the first inductive switch K1 generates and outputs a second signal to the control system, the control system records a second grinding total time length T2, the step takes a second time period T2= T2-T1, the coffee powder in the powder bowl is a second accumulated capacity VB at the moment, the control system automatically calculates the grinding speed V = V2/T2 of the grinding system, wherein V2 is the capacity difference of the coffee powder accumulated to the second capacity position from the first capacity position in the powder bowl, namely the second capacity, the second capacity V2 is a constant, and V2= VB-VA;

(4) The control system determines the total grinding time or the remaining working time of the crushing system according to the grinding speed v to empty the crushing system, wherein the remaining working time comprises compensation time, the emptying time of the crushing system and safe grinding time:

4.1 according to the total grinding volume and the grinding speed required by the product specification, the system automatically calculates the compensation time, wherein the compensation time is T3= V3/V = T2 (V3/V2), and when the compensation time is over, the system continuously times for T3, and T3= T2+ T3; wherein V3 is a constant, and V3 is more than or equal to 0 according to the position setting of the second position structure relative to the powder bowl; when V3 is larger than 0, the total volume of the coffee powder corresponding to the volume of the powder bowl is compensated;

4.2 after the compensation time is completed, the door 120 of the storage and discharge system is closed, the passage of the coffee beans into the grinding system is blocked, and at this moment, the coffee beans which are not ground yet and output from the storage and discharge system correspond to a certain coffee powder capacity. Therefore, the starting point of the grinding system emptying time t4 is the time point when the coffee beans are stopped being delivered to the grinding system by the storing and feeding system, the grinding system emptying time t4= V4/V = t2 (V4/V2), V4 is the amount of coffee grinds that are not completed by the grinding system when the coffee beans are delivered to the grinding system by the storing and feeding system, and V4 is the capacity of coffee grinds corresponding to the coffee beans that have not been ground when the coffee beans are delivered to the grinding system by the storing and feeding system. V4 is a constant value, determined by the space for containing the coffee beans that have been delivered, such as the bean grinding chamber, the gap between the movable grinding wheel and the adjustable grinding wheel, and set in the system. The bean grinding motor continues to work until the residual coffee beans and coffee powder in the grinding system are emptied. So far, the continuous timing time of the system is T4, and T4= T3+ T4; the total amount of coffee powder ground by the system is V = VD = V1+ V2+ V3+ V4, wherein VD is the cumulative volume of coffee powder ground finished in the step. According to the total amount V of the coffee powder and the grinding speed V, the total grinding time of the grinding system can be calculated to be V/V.

4.3 after the time for emptying the grinding system is finished, in order to ensure that the coffee powder in the grinding system is emptied, the control system makes the bean grinding motor continue to work for a safe grinding time t5, the safe grinding time is set to t5=0-5 seconds, and the bean grinding motor stops working after the safe grinding time is finished. When T5=0, the bean grinding motor is stopped when T4 is finished. So far, the system continuously times for T5, where T5= T4+ T5; the total amount of coffee powder finished by the system grinding is also V = V1+ V2+ V3+ V4.

Therefore, the control system is used for timing, and when the total working time of the bean grinding motor reaches T5, the bean grinding motor stops working. Alternatively, the time is counted at the time end point of T1 (corresponding to the time counting start point of T2) or the time end point of T2 (corresponding to the time counting start point of T3), and the bean grinding motor is controlled to stop working according to the time length of the grinding speed instruction bean grinding motor after the counting time point.

The quantitative bean grinding device and the quantitative bean grinding method are applied to the bean grinding coffee machine, so that the bean grinding coffee machine realizes quantitative bean grinding: the quantitative bean grinding device on the machine body is used for grinding coffee powder with the volume corresponding to the powder bowl and emptying the grinding system, or/and the quantitative bean grinding method is executed to obtain the total volume V of the coffee powder with the size corresponding to the powder bowl and empty the grinding system. Then the coffee powder is brewed into the coffee beverage.

Claims (20)

1. Quantitative bean grinding device, characterized by includes:

a storage and feeding system (100) for storing and feeding down coffee beans;

a grinding system (200) for grinding and grinding the delivered coffee beans;

a filling and dosing system (300) for receiving and dosing coffee powder, comprising a transmission shaft (310), a powder pressing wheel (320), a first inductive switch (K1) and a replaceable powder bowl (330), wherein the powder bowl is positioned below the crushing system (200), the powder pressing wheel (320) is positioned in the powder bowl (330) and is rotated by power transmitted by the transmission shaft to compact coffee powder in the powder bowl and simultaneously raise the position of the coffee powder in the powder bowl, the first inductive switch (K1) is used for sensing a first position and a second position when the powder pressing wheel is raised in the powder bowl, the first position corresponds to a first capacity position to which the coffee powder is accumulated in the powder bowl, the second position corresponds to a second capacity position to which the coffee powder is accumulated in the powder bowl, and the capacity difference of the coffee powder accumulated in the powder bowl from the first capacity position to the second capacity position is a second capacity;

and the control system is used for controlling the storage and blanking system (100), the crushing system (200) and the filling and quantifying system (300) to cooperatively act, the control system records a second time period required by the first inductive switch (K1) to induce the powder pressing wheel (320) to rise from the first position to the second position in the powder bowl (330), and determines the grinding speed according to the second capacity and the second time period and determines the total grinding time or the residual working time of the crushing system according to the grinding speed so as to empty the crushing system.

2. The quantitative bean grinding apparatus as set forth in claim 1, wherein: the powder pressing wheel (320) is provided with inclined vanes (321), and the vanes are lifted by coffee powder in the powder bowl when the powder pressing wheel rotates.

3. The quantitative bean grinding apparatus as set forth in claim 2, wherein: the transmission shaft (310) is vertically arranged in a floating mode, and the powder pressing wheel (320) is fixedly connected to the lower end of the transmission shaft (310).

4. A quantitative bean grinding apparatus as claimed in claim 3, wherein: the first induction switch (K1) is located above the powder bowl (330), and a first position structure (311) corresponding to the first position and a second position structure (312) corresponding to the second position, which are used for triggering the first induction switch (K1), are arranged on the transmission shaft (310).

5. The quantitative bean grinding apparatus as set forth in claim 4, wherein: first inductive switch (K1) is photoelectric switch, first position structure (311) and second position structure (312) are for seting up the epaxial annular of transmission, photoelectric switch corresponds to send signal to control system during the annular.

6. A quantitative bean grinding apparatus as claimed in claim 3, wherein: the crushing system (200) comprises a power output end (210), and the transmission shaft (310) and the power output end (210) are inserted together to realize the vertical floating.

7. The quantitative bean grinding apparatus as claimed in claim 2, wherein: the transmission shaft is vertically positioned, and the powder pressing wheel is assembled on the transmission shaft in a floating mode.

8. The quantitative bean grinding apparatus as set forth in claim 2, wherein: the edge of the vane is provided with a flexible part contacting the inner wall of the powder bowl.

9. The quantitative bean grinding apparatus as set forth in claim 1, wherein: the powder bowls (330) comprise at least two powder bowls with different specifications, the powder bowls with different specifications have different capacities corresponding to the parts below the first position, and the powder bowls with different specifications have the same capacity corresponding to the parts above the first position.

10. The quantitative bean grinding apparatus as set forth in claim 1, wherein: the powder bowl (330) is replaceably arranged in a filter (340), the filter (340) is detachably assembled on a retainer (350), and the transmission shaft (310) extends from the upper part of the retainer (350) to the powder bowl (330); the transmission shaft or the powder pressing wheel is vertically limited, so that the transmission shaft and the powder pressing wheel are kept at the assembling position when the powder bowl is disassembled from the retainer along with the filter.

11. The quantitative bean grinding apparatus as set forth in claim 10, wherein: the quantitative bean grinding device is provided with a second inductive switch (K2), and the second inductive switch (K2) provides a standby signal for the control system when the filter (340) is assembled on the holding frame (350).

12. The quantitative bean grinding apparatus as claimed in claim 1 or 11, wherein: the quantitative bean grinding device is provided with a third inductive switch (K3), and the third inductive switch (K3) provides standby signals for the control system after the storage and blanking system (100) is installed in place.

13. The quantitative bean grinding device as claimed in claim 1, wherein: the material storing and discharging system (100) is provided with a normally closed door (120), the door (120) is driven to open by a driving device (121), and the driving device is controlled by the control system.

14. The quantitative grinding apparatus as set forth in claim 13, wherein: storage and unloading system (100) have storage box (110), storage box (110) have bottom surface (111), bottom surface (111) have feed opening (112), door (120) be two and symmetrically slide the assembly in bottom surface (111) are used for opening or close feed opening (112).

15. The quantitative grinding apparatus as set forth in claim 14, wherein: the lower part of feed opening (112) has one section drum (113), a rotatable gear (131) is put to cover on drum (113), with gear engagement disposes two racks (132), two racks branch are in the gear both sides, door (120) one by one with rack (132) are connected and are made two doors can be close to each other in step and close the feed opening or keep away from each other and open the feed opening, drive arrangement (121) are driving the door through the rectilinear movement of a rack and are being opened.

16. The quantitative milling apparatus as set forth in claim 15, wherein: the door (120) is positioned on the upper side of the bottom surface (111), the bottom surface (111) is provided with a long hole (114), and the door is connected with the rack through a rod (122) penetrating in the long hole.

17. The quantitative grinding apparatus as set forth in claim 14, wherein: the bottom surface (111) is provided with a guide strip (115), and the door (120) is guided by the guide strip (115).

18. The quantitative grinding apparatus as set forth in claim 14, wherein: the door (120) is connected with a spring (123), and the elasticity of the spring (123) urges the door to close the feed opening.

19. The quantitative bean grinding apparatus as set forth in claim 1, wherein: the crushing system (200) comprises a movable grinding wheel (230) and an adjustable grinding wheel (240) which are positioned in a bean grinding chamber (220), wherein the movable grinding wheel (230) is driven by a bean grinding motor (250) through a transmission device (260), and the adjustable grinding wheel (240) adjusts the gap between the adjustable grinding wheel and the movable grinding wheel through an adjusting ring (271).

20. Grind beans coffee machine, characterized by: a dosing device (20) according to any one of claims 1 to 19 is arranged on the body (10) for grinding coffee powder corresponding to the volume of the powder bowl and emptying the grinding system.

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