Grinding and extracting device for coffee preparation and extracting method

Abstract

The invention discloses a grinding and extracting device for coffee preparation and an extracting method, and relates to the technical field of grinding and brewing beverage preparation devices.The grinding and extracting device comprises a first grinding assembly, a second grinding assembly, a bean containing box and a collecting assembly; the second grinding assembly is in threaded connection with the upper part of the first grinding assembly, the bean containing box is in threaded connection with the upper part of the second grinding assembly, and the collecting assembly is in threaded connection with the lower part of the first grinding assembly; the first grinding assembly comprises a grinding cylinder; the second grinding assembly comprises a grinding box, an electric telescopic rod, a rotating motor, a grinding cutter and the like; a limiting block is arranged at the bottom of the grinding cutter; the collecting assembly comprises a base, a guide rail, a fixing block and a bean containing box, a supporting spring and a supporting panel are arranged in the base, and the bean containing box is detachably installed on the supporting panel; the fixed block can slide on the guide rail, a roller is arranged on the detection section of the supporting rod on the fixed block, a first signal transmitter for controlling the rotating motor to stop is arranged in one detection section, and the roller is in contact with the positioning block, so that the amount of coffee powder to be ground can be flexibly adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of beverage preparation devices for grinding and brewing, and in particular to a grinding and extraction device and an extraction method for coffee preparation. Background Art

[0002] The process of coffee extraction is deeply rooted in two core principles: diffusion and erosion. Extraction, in short, is a technical means of extracting valuable components from raw materials; in the delicate world of coffee making, extraction is the use of clear water as a medium to subtly extract the unique flavors hidden in coffee beans and transform them into the alluring aroma in our cups; therefore, the final flavor differences in coffee not only stem from the inherent characteristics of the coffee beans themselves, such as variety, origin, and roasting degree, but are also greatly influenced by the extraction method and the fineness of the adjustment process.

[0003] Publication No. CN111493668B discloses a coffee grinder for a coffee machine, which includes a bean hopper, a grinder, and an extraction funnel. The bean hopper, grinder, and extraction funnel are sequentially connected in cooperation. The grinder is provided with a grinding assembly and a main shaft that can rotate separately; a powder pressing drill is provided in the lower port of the grinder, and the powder pressing drill is connected to the lower end of the main shaft in cooperation, so that the powder pressing drill can rotate circumferentially with the main shaft and the powder pressing drill can move up and down along the main shaft; a clutch transmission device for driving the grinding assembly is provided on the powder pressing drill; the coffee grinder of the present invention uses one motor to drive the grinder, and the grinding assembly and the powder pressing drill are connected by a clutch. When the grinding amount of coffee beans meets the set value, due to the increase in the thickness of the powder cake, the powder pressing drill is lifted and disconnected from the grinding assembly; and the powder pressing drill continues to complete the powder distribution and compaction operations. The overall structure is simple and compact, and the overall cost of the coffee machine can be effectively reduced.

[0004] In the actual use process of the above coffee grinder for a coffee machine, the amount of coffee powder to be ground cannot be flexibly adjusted, and the grinding amount is relatively fixed. Summary of the Invention

[0005] The present application provides a grinding and extraction device and an extraction method for coffee preparation, which solves the technical problem in the prior art that the amount of coffee powder to be ground cannot be flexibly adjusted and the grinding amount is relatively fixed. When the weight of the coffee powder increases, the support spring is pressed down. The support rod is inserted into the support spring and limits the distance of the downward pressure of the support spring. When the downward pressure reaches the specified weight, the three rollers simultaneously contact the first iron ring to form a circuit, so that the first signal transmitter transmits a signal to the rotary motor. After receiving the signal, the rotary motor stops rotating, thereby achieving the technical effect of adjusting the amount of coffee powder ground from coffee beans.

[0006] The present application provides a grinding and extraction device and an extraction method for coffee preparation, including a first grinding component, a second grinding component, and a bean loading box; the second grinding component is threadedly connected to the upper part of the first grinding component; the bean loading box is threadedly connected to the upper part of the second grinding component; the lower part of the first grinding component is threadedly connected with a collection component;

[0007] The first grinding component includes a grinding cylinder, the inner cross-section of the upper part of the grinding cylinder is provided with threads; a bean guiding groove is opened on the top surface of the grinding cylinder, a first inner cavity is opened near the middle of the grinding cylinder, and a grinding groove communicating with the bean guiding groove and the first inner cavity is also opened in the grinding cylinder; on the cross-section of the first inner cavity near the grinding groove, first support plates are symmetrically fixed, and a ring bowl is fixed between the two first support plates; a cylindrical block is fixed on the top surface of the ring bowl; the inner cross-section of the lower part of the grinding cylinder near the first inner cavity is provided with threads;

[0008] The second grinding component includes a grinding box, an electric telescopic rod, a rotating motor, a grinding knife, and a limiting block; internal threads and external threads are respectively arranged on the upper and lower parts of the grinding box, the grinding box is threadedly connected to the upper part of the grinding cylinder through threads, and the grinding box and the grinding cylinder are concentric; a bean guiding pipe is fixed inside the grinding box and communicated with the bean guiding groove; the electric telescopic rod is fixed inside the grinding box, the output end of the electric telescopic rod is fixed with the rotating motor, the output end of the rotating motor is fixed with the grinding knife, and a grinding wall adapted to the grinding knife is arranged on the cross-section of the grinding groove;

[0009] The bottom of the grinding knife is fixed with the limiting block, and a groove adapted to the cylindrical block is opened on the limiting block; the bottom of the bean loading box is provided with threads, and the lower part of the bean loading box is threadedly connected to the upper part of the grinding box; a discharge port is opened at the bottom of the bean loading box, and the discharge port is communicated with the bean guiding pipe;

[0010] The collection component includes a base, a guide rail, a fixed block, and an assembly box; the outer cross-section of the upper part of the base is provided with threads, and the base is threadedly connected to the lower part of the grinding cylinder through threads; a second inner cavity is opened in the base; three support springs are circumferentially fixed on the inner bottom surface of the second inner cavity, and a support panel is detachably installed on the top of the support spring;

[0011] The bean loading box is detachably installed on the support panel; a positioning block is fixed at the bottom of the support panel, a first iron ring is arranged on the positioning block, a thin iron sheet is arranged on the outer cross-section of the first iron ring, a discharging device is installed inside the first iron ring, and the discharging device is also started when the rotating motor is started; three guide rails are fixed on the outer cross-section circumference of the base; the guide rails are of a rectangular structure, a plurality of guide rail grooves are formed on the outer cross-section of the guide rails and are communicated with each other; the fixing block is provided with an inner groove adapted to the guide rails; the fixing block is slidably connected with the guide rails through the inner groove, and fixing grooves are formed on both sides of the fixing block, and the fixing block is detachably connected to the guide rails through bolts passing through the fixing grooves;

[0012] The fixing block further includes a support rod, one end of the support rod is fixed in the inner groove, and the other end passes through the guide rail groove and the support spring; a detection section is arranged at the other end of the support rod and is made of iron; a roller is rotatably connected to the detection section, and the roller is made of hollow iron; a first signal transmitter is fixed in one of the detection sections and is close to the roller, and the function of the first signal transmitter is to control the stop of the rotating motor; the three rollers are in contact with the positioning block.

[0013] Preferably, a valve is arranged at the communication port of the bean guiding tube and the bean guiding groove, and a second iron ring is further arranged on the positioning block and is located at the lower end of the first iron ring; a second signal transmitter is fixed in one of the detection sections, and the function of the second signal transmitter is to control the closing of the valve; counters are installed in the first signal transmitter and the second signal transmitter, and the counters are self-powered.

[0014] Preferably, threads are arranged on the positioning block, threads are arranged on the inner cross-sections of the second iron ring and the first iron ring, and the second iron ring and the first iron ring are connected to the positioning block through threads.

[0015] Preferably, an electromagnet is fixedly installed inside the cylindrical block; the cylindrical block includes a connecting column, an iron disc, and a clamping block; one end of the connecting column is fixedly provided with the iron disc, and the other end passes through the cylindrical block and is rotatably connected to the cylindrical block; the clamping blocks are symmetrically and fixedly installed on the outer cross-section of the iron disc; a clamping groove adapted to the clamping block is formed at the lower end of the limiting block; the first iron ring also controls the closing of the electromagnet; a second support plate is fixedly installed at the lower end of the connecting column, and a scraping plate is fixedly installed at one end of the second support plate away from the connecting column, and the scraping plate is in contact with the inner wall of the first inner cavity of the grinding cylinder; a third iron ring is also threadedly connected to the outer cross-section of the positioning block, a thin iron sheet is arranged on the outer cross-section of the third iron ring, and the third iron ring is located between the second iron ring and the first iron ring; a third signal transmitter is fixedly installed in one of the detection sections, and the function of the third signal transmitter is to control the start of the electromagnet. A counter is installed in the third signal transmitter, and the counter is self-powered.

[0016] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0017] As the weight of the coffee powder increases, the support spring is pressed down. The support rod is inserted into the support spring and limits the distance by which the support spring is pressed down. When the specified weight is reached, the three rollers simultaneously contact the first iron ring to form a circuit, enabling the first signal transmitter to transmit a signal to the rotary motor. After receiving the signal, the rotary motor stops rotating, thereby achieving the technical effect of adjusting the amount of coffee powder ground from the coffee beans. In addition, the electric telescopic rod controls the distance between the grinding knife and the grinding wall of the grinding groove, and can adjust the fineness of the coffee powder ground from the coffee beans. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structure schematic diagram of a coffee preparation grinding and extraction device and extraction method of the present invention;

[0019] Figure 2 It is a semi-sectional split structure diagram of a coffee preparation grinding and extraction device and extraction method of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the first signal transmitter of a coffee preparation grinding and extraction device and extraction method of the present invention;

[0021] Figure 4 It is a schematic diagram of the distribution structure of the support spring of a coffee preparation grinding and extraction device and extraction method of the present invention;

[0022] Figure 5 It is a semi-sectional structure schematic diagram of Embodiment 2 of a coffee preparation grinding and extraction device and extraction method of the present invention;

[0023] Figure 6Structural diagram of the second signal transmitter for the second embodiment of a coffee grinding and extraction device and extraction method according to the present invention;

[0024] Figure 7 Structural diagram of the second iron ring for the third embodiment of a coffee grinding and extraction device and extraction method according to the present invention;

[0025] Figure 8 Structural diagram of the connecting column for the fourth embodiment of a coffee grinding and extraction device and extraction method according to the present invention;

[0026] Figure 9 Schematic diagram of the scraper structure for the fourth embodiment of a coffee grinding and extraction device and extraction method according to the present invention;

[0027] Figure 10 Structural diagram of the third iron ring for the fourth embodiment of a coffee grinding and extraction device and extraction method according to the present invention;

[0028] Figure 11 Schematic diagram of the position of the third iron ring for the fourth embodiment of a coffee grinding and extraction device and extraction method according to the present invention.

[0029] In the figure:

[0030] 100, first grinding assembly, 101, bean guide groove, 102, grinding groove, 103, first inner cavity, 110, grinding cylinder, 111, first support plate, 112, ring bowl, 113, cylindrical block, 120, second grinding assembly, 121, grinding box, 122, bean guide pipe, 123, electric telescopic rod, 124, rotary motor, 125, grinding knife, 126, limit block, 127, valve, 130, bean loading box, 200, base, 201, second inner cavity, 210, support spring, 220, support panel, 230, positioning block, 231, first iron ring, 232, second iron ring, 233, third iron ring, 240, bean loading box, 250, guide rail, 251, guide rail groove, 260, fixing block, 261, support rod, 2611, detection section, 262, roller, 263, first signal transmitter, 264, second signal transmitter, 265, third signal transmitter, 1131, electromagnet, 270, connecting column, 271, iron plate, 272, clamping block, 273, second support plate, 274, scraper. Detailed implementation manners

[0031] For the convenience of understanding the present invention, the present application will be described more comprehensively with reference to the relevant drawings; the preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0032] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this article are for illustrative purposes only and do not represent the only implementation.

[0033] Unless otherwise defined, all technical and scientific terms used in this article have the same meaning as commonly understood by those skilled in the technical field to which this invention belongs; the terms used in the description of this invention in this article are only for the purpose of describing specific implementations and are not intended to limit this invention; the term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0034] Example 1: As Figures 1 to 4 shown, a grinding and extraction device and extraction method for coffee preparation of the present application includes a first grinding assembly 100, a second grinding assembly 120, and a bean loading box 130; the second grinding assembly 120 is threadedly connected to the upper part of the first grinding assembly 100; the bean loading box 130 is threadedly connected to the upper part of the second grinding assembly 120; a collection assembly is threadedly connected to the lower part of the first grinding assembly 100;

[0035] The first grinding assembly 100 includes a grinding cylinder 110, and the inner cross-section of the upper part of the grinding cylinder 110 is provided with threads; a bean guiding groove 101 is opened on the top surface of the grinding cylinder 110, a first inner cavity 103 is opened near the middle of the grinding cylinder 110, and a grinding groove 102 communicating with the bean guiding groove 101 and the first inner cavity 103 is also opened in the grinding cylinder 110; first support plates 111 are symmetrically fixed on the cross-section of the first inner cavity 103 close to the grinding groove 102, and a ring bowl 112 is fixed between the two first support plates 111; a cylindrical block 113 is fixed on the top surface of the ring bowl 112; threads are provided on the inner cross-section of the lower part of the grinding cylinder 110 close to the first inner cavity 103;

[0036] The second grinding assembly 120 includes a grinding box 121, an electric telescopic rod 123, a rotary motor 124, a grinding knife 125, and a limiting block 126; internal threads and external threads are respectively provided on the upper and lower parts of the grinding box 121, and the grinding box 121 is threadedly connected to the upper part of the grinding cylinder 110 through threads, and the grinding box 121 and the grinding cylinder 110 are concentric; a bean guiding pipe 122 is fixed inside the grinding box 121 and communicates with the bean guiding groove 101; the electric telescopic rod 123 is fixed inside the grinding box 121, the output end of the electric telescopic rod 123 is fixed with the rotary motor 124, the output end of the rotary motor 124 is fixed with the grinding knife 125, and a grinding wall adapted to the grinding knife 125 is provided on the cross-section of the grinding groove 102;

[0037] The bottom of the grinding knife 125 is fixed with the limit block 126, and the limit block 126 is provided with a groove adapted to the cylindrical block 113; the bottom of the bean loading box 130 is provided with threads, and the lower part of the bean loading box 130 is threadedly connected to the upper part of the grinding box 121; the bottom of the bean loading box 130 is provided with a discharge port, and the discharge port is communicated with the bean guiding pipe 122;

[0038] The collection assembly includes a base 200, a guide rail 250, a fixing block 260 and a bean loading box 240; the outer cross-section of the upper part of the base 200 is provided with threads, and the base 200 is threadedly connected to the lower part of the grinding cylinder 110 through the threads; a second inner cavity 201 is opened in the base 200; three support springs 210 are fixedly arranged on the inner bottom surface circumference of the second inner cavity 201, and a support panel 220 is detachably installed at the top of the support spring 210;

[0039] The bean loading box 240 is detachably installed on the support panel 220; a positioning block 230 is fixed at the bottom of the support panel 220, a first iron ring 231 is arranged on the positioning block 230, a thin iron sheet is arranged on the outer cross-section of the first iron ring 231, and a discharge device is installed in the first iron ring 231, and the discharge device is also started when the rotating motor is started; three guide rails 250 are fixedly arranged on the outer cross-section circumference of the base 200; the guide rail 250 is of a rectangular structure, and a plurality of guide rail grooves 251 are opened on the outer cross-section of the guide rail 250 and are communicated with each other; the fixing block 260 is provided with an inner groove adapted to the guide rail 250; the fixing block 260 is slidably connected to the guide rail 250 through the inner groove, and fixing grooves are opened on both sides of the fixing block 260, and the fixing block 260 is detachably connected to the guide rail 250 through bolts passing through the fixing grooves;

[0040] The fixing block 260 further includes a support rod 261, one end of the support rod 261 is fixed in the inner groove, and the other end passes through the guide rail groove 251 and the support spring 210; a detection section 2611 is arranged at the other end of the support rod 261 and is made of iron; a roller 262 is rotatably connected to the detection section 2611, and the roller 262 is made of hollow iron; a first signal transmitter 263 is fixed in one of the detection sections 2611 and is close to the roller 262, and the function of the first signal transmitter 263 is to control the stop of the rotating motor 124; the three rollers 262 are in contact with the positioning block 230.

[0041] Specific implementation: First, threadedly connect the bean loading box 130 to the upper part of the grinding box 121, and then threadedly connect the base 200 to the lower part of the grinding cylinder 110; pour the coffee beans into the bean loading box 130, and the coffee beans enter the bean guiding groove 101 through the bean guiding pipe 122; then insert the fixing block 260 into the guide rail 250, pass through the guide rail groove 251 and the support spring 210. At this time, the inner groove of the fixing block 260 is sleeved on the outer section of the guide rail 250, and then fix the fixing block 260 on the guide rail 250 with bolts; the distance between the grinding knife 125 and the grinding groove 102 can be controlled by the electric telescopic rod 123, so as to adjust the fineness of the ground coffee powder; then start the rotating motor 124 to drive the grinding knife 125 to rotate to grind the coffee powder; the ground coffee powder falls into the bean loading box 240, and the amount of coffee powder gradually increases, causing the bean loading box 240 to press down the support panel 220 and drive the support spring 210 to contract and press down. When the first iron ring 231 on the positioning block 230 contacts the three rollers 262 at the same time (after the rotating motor 124 is started, the discharging device in the first iron ring 231 is also started, so that the first iron ring 231 is charged), the first signal transmitter 263 is powered on, and the first signal transmitter 263 transmits the signal to the rotating motor 124 to control the rotating motor 124 to turn off; after grinding, reverse the base 200, disconnect it from the grinding cylinder 110, and then take out the bean loading box 240.

[0042] Beneficial effects: As the weight of the coffee powder increases, the support spring 210 contracts and presses down. The support rod 261 is inserted into the support spring 210 to limit the pressing distance of the support spring 210. When the pressing reaches the specified weight, the three rollers 262 contact the first iron ring 231 at the same time to form a circuit, so that the first signal transmitter 263 transmits the signal to the rotating motor 124. After receiving the signal, the rotating motor 124 stops rotating, so as to achieve the technical effect of adjusting the amount of coffee powder ground from the coffee beans, and the electric telescopic rod 123 controls the distance between the grinding knife 125 and the grinding wall of the grinding groove 102, and the fineness of the coffee powder ground from the coffee beans can be adjusted.

[0043] Embodiment 2: In order to prevent the technical problem that there is still incompletely ground coffee powder in the grinding groove 102 after the rotating motor 124 is turned off, resulting in waste of coffee powder; for the above technical problem, the present application proposes the following technical solution, specifically:

[0044] As Figure 5 and Figure 6As shown in the figure, a valve 127 is provided at the communication port between the bean guide tube 122 and the bean guide groove 101. A second iron ring 232 is further provided on the positioning block 230 and is located below the first iron ring 231. The structure of the second iron ring 232 is the same as that of the first iron ring 231. A second signal transmitter 264 is fixed in one of the detection sections 2611. The function of the second signal transmitter 264 is to control the closing of the valve 127. The first signal transmitter 263 and the second signal transmitter 264 are equipped with counters, and the counters are self-powered.

[0045] Specific implementation: After starting the rotating motor 124, the counters in the first signal transmitter 263 and the second signal transmitter 264 start counting (counting once for each power-on). When the support spring 210 is pressed down to a specified weight, the roller 262 first contacts and is powered on with the second iron ring 232, causing the second signal transmitter 264 to send a signal to the valve 127. After receiving the signal, the valve 127 closes. When the weight gradually increases until the roller 262 contacts the first iron ring 231, the first signal transmitter 263 is powered on, causing the first signal transmitter 263 to transmit a signal to the rotating motor 124. After receiving the signal, the rotating motor 124 rotates for another 15 seconds and then stops rotating. It should be noted that when powered on, the counters in the first signal transmitter 263 and the second signal transmitter 264 start counting simultaneously, but the second signal transmitter 264 sends a signal after counting once, and the first signal transmitter 263 needs to count twice to send a signal. When the rotating motor 124 is turned off, the counts recorded by the counters are cleared.

[0046] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0047] By first contacting the second iron ring 232 with the roller 262 to control the closing of the valve 127 and then contacting the first iron ring 231 to control the rotating motor 124 to stop rotating after 15 seconds, it is possible to prevent the situation where there is still incompletely ground coffee powder in the grinding groove 102.

[0048] Embodiment 3: According to different coffee bean varieties, the hardness of coffee beans and the density of the ground coffee powder will also be different. In order to more finely adjust the weight of the ground coffee powder; in view of the above technical problems, the following technical solutions are proposed in this application, specifically:

[0049] As Figure 7 shown in the figure, the positioning block 230 is provided with threads, and the inner cross-sections of the second iron ring 232 and the first iron ring 231 are provided with threads. The second iron ring 232 and the first iron ring 231 are threadedly connected to the positioning block 230.

[0050] Specific implementation: By means of the threaded connection between the first iron ring 231, the second iron ring 232 and the positioning block 230, the distance between the first iron ring 231 and the second iron ring 232 can be adjusted. After the valve 127 is closed, due to the adjustment of the distance between the first iron ring 231 and the second iron ring 232, the time for the roller 262 to contact the first iron ring 231 will become longer, and the ground coffee powder will be more sufficient.

[0051] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0052] By means of the threaded connection between the first iron ring 231, the second iron ring 232 and the positioning block 230, the distance between the first iron ring 231 and the second iron ring 232 can be adjusted. After the valve 127 is closed, due to the adjustment of the distance between the first iron ring 231 and the second iron ring 232, the time for the roller 262 to contact the first iron ring 231 will become longer. Not only can 261 adjust the amount of coffee powder to be ground, but also by adjusting the distance between the first iron ring 231 and the second iron ring 232, the amount of ground coffee powder can be refined.

[0053] Embodiment 4: When the first inner cavity 103 is in a humid environment, the ground coffee powder will stick to the inner wall of the first inner cavity 103, which may cause the weight of the coffee powder in the bean hopper 240 not to reach the expected amount, making it impossible for the roller 262 to smoothly contact the first iron ring 231. To solve the above technical problems, the following technical solutions are proposed in this application, specifically:

[0054] As Figures 8 to 11 shown, an electromagnet 1131 is fixed inside the cylindrical block 113; the cylindrical block 113 includes a connecting column 270, an iron disk 271 and a clamping block 272; one end of the connecting column 270 is fixed with the iron disk 271, and the other end passes through the cylindrical block 113 and is rotatably connected to the cylindrical block 113; the clamping blocks 272 are symmetrically fixed on the outer section of the iron disk 271; a clamping groove adapted to the clamping block 272 is opened at the lower end of the limiting block 126; the first iron ring 231 also controls the closing of the electromagnet 1131;

[0055] A second support plate 273 is fixed at the lower end of the connecting column 270, and a scraping plate 274 is fixed at one end of the second support plate 273 away from the connecting column 270. The scraping plate 274 is in contact with the inner wall of the first inner cavity 103 of the grinding cylinder 110;

[0056] A third iron ring 233 is also threadedly connected to the outer cross-section of the positioning block 230. A thin iron sheet is provided on the outer cross-section of the third iron ring 233. A discharge device is installed inside the third iron ring 233. The third iron ring 233 is located between the second iron ring 232 and the first iron ring 231. A third signal transmitter 265 is fixed inside one of the detection segments 2611. The function of the third signal transmitter 265 is to control the activation of the electromagnet 1131. A counter is installed inside the third signal transmitter 265, and the counter is self-powered.

[0057] Specific implementation: The roller 262 first contacts the second iron ring 232 to close the valve 127. As the weight of the coffee powder in the bean loading box 240 increases, the roller 262 then contacts the third iron ring 233 and activates the electromagnet 1131. The electromagnet 1131 exerts an upward repulsive force on the iron plate 271, causing the latch 272 to be stuck in the card slot of the limit block 126. The rotation of the limit block 126 drives the connecting column 270 to rotate. The rotation of the connecting column 270 drives the second support plate 273 and the scraper 274 to rotate. The rotation of the scraper 274 scrapes the coffee powder adhering to the inner wall of the first inner cavity 103 and drops it into the bean loading box 240. When the roller 262 contacts the first iron ring 231, the rotary motor 124 and the electromagnet 1131 are turned off after 15 seconds. It should be noted that when powered on, the counters inside the first signal transmitter 263, the second signal transmitter 264, and the third signal transmitter 265 start counting simultaneously. However, the second signal transmitter 264 emits a signal after counting once, the third signal transmitter 265 emits a signal after counting twice, and the first signal transmitter 263 emits a signal after counting three times. When the rotary motor 124 is turned off, the counted numbers of the counters are cleared.

[0058] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0059] It can scrape off the coffee powder on the inner wall of the first inner cavity 103, enabling the roller 262 to smoothly contact the first iron ring 231, and turning off the rotary motor 124 and the electromagnet 1131, enhancing the intelligence level of the device; effectively preventing the situation that when the first inner cavity 103 is in a humid environment, the ground coffee powder will stick to the inner wall of the first inner cavity 103, which may cause the roller 262 to be unable to smoothly contact the first iron ring 231.

[0060] The above description is only the preferred implementation manner of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A grinding and extraction device for coffee preparation, characterized in that: The invention comprises a first grinding assembly (100), a second grinding assembly (120), and a bean filling box (130); the second grinding assembly (120) is threadedly connected to the upper part of the first grinding assembly (100); the bean filling box (130) is threadedly connected to the upper part of the second grinding assembly (120); and the lower part of the first grinding assembly (100) is threadedly connected to a collecting assembly.

2. A grinding and extraction device for coffee preparation according to claim 1, characterized in that: The first grinding assembly (100) comprises a grinding cylinder (110), the inner cross section of the upper part of the grinding cylinder (110) is provided with a thread; the top surface of the grinding cylinder (110) is provided with a bean guide groove (101), the grinding cylinder (110) is provided with a first inner cavity (103) near the middle, and the grinding cylinder (110) is also provided with a grinding groove (102) connected with the bean guide groove (101) and the first inner cavity (103); first support plates (111) are symmetrically fixed on the cross section of the first inner cavity (103) near the grinding groove (102), and a ring bowl (112) is fixed between the two first support plates (111); a cylindrical block (113) is fixed on the upper top surface of the ring bowl (112); and the inner cross section of the lower part of the grinding cylinder (110) near the first inner cavity (103) is provided with a thread.

3. A grinding and extraction device for coffee preparation as claimed in claim 2, characterized in that: The second grinding assembly (120) comprises a grinding box (121), an electric telescopic rod (123), a rotating motor (124), a grinding knife (125) and a stop block (126); the upper and lower parts of the grinding box (121) are respectively provided with internal threads and external threads, the grinding box (121) is threadedly connected to the upper part of the grinding cylinder (110) through threads, and the grinding box (121) and the grinding cylinder (110) are cocentric; a bean guide tube (122) is fixed inside the grinding box (121) and is connected to the bean guide groove (101); the electric telescopic rod (123) is fixed inside the grinding box (121), the rotating motor (124) is fixed at the output end of the electric telescopic rod (123), the grinding knife (125) is fixed at the output end of the rotating motor (124), and a grinding wall matched with the grinding knife (125) is provided on the cross section of the grinding groove (102).

4. A grinding and extraction device for coffee preparation as claimed in claim 3, characterized in that: The bottom of the grinding knife (125) is fixed with the limiting block (126), and the limiting block (126) is provided with a groove matched with the cylindrical block (113); the bottom of the bean filling box (130) is provided with a thread, and the lower part of the bean filling box (130) is threadedly connected with the upper part of the grinding box (121); the bottom of the bean filling box (130) is provided with a discharge port, and the discharge port is connected with the bean guiding pipe (122).

5. A grinding and extraction device for coffee preparation as claimed in claim 4, characterized in that: The collecting assembly comprises a base (200), a guide rail (250), a fixing block (260) and a bean box (240); the upper outer section of the base (200) is provided with a thread, and the base (200) is connected to the lower thread of the grinding cylinder (110) through the thread; a second inner cavity (201) is opened in the base (200); three supporting springs (210) are fixed on the circumference of the inner bottom surface of the second inner cavity (201), and a supporting panel (220) is detachably mounted on the top of the supporting spring (210).

6. A grinding and extraction device for coffee preparation as claimed in claim 5, characterized in that: The bean box (240) is detachably mounted on the support panel (220); a positioning block (230) is fixed at the bottom of the support panel (220); a first iron ring (231) is arranged on the positioning block (230); a thin iron sheet is arranged on the outer cross section of the first iron ring (231); a discharge device is arranged inside the first iron ring (231); when the rotating motor (124) is started, the discharge device is also started; three guide rails (250) are fixed on the circumference of the outer cross section of the base (200); the guide rail (250) is a rectangular structure; a plurality of guide rail grooves (251) are formed on the outer cross section of the guide rail (250), and the guide rail grooves (251) are interconnected; the fixing block (260) is formed with an inner groove matched with the guide rail (250); the fixing block (260) is slidably connected with the guide rail (250) through the inner groove, and the fixing block (260) is connected to the guide rail (250) by sliding. The fixing block (260) is provided with fixing grooves on both sides, and is detachably connected to the guide rail (250) by bolts passing through the fixing grooves; the fixing block (260) also includes a support rod (261), one end of which is fixed in the inner groove, and the other end passes through the guide rail groove (251) and the support spring (210); the other end of the support rod (261) is provided with a detection section (2611) made of iron; a roller (262) is rotatably connected to the detection section (2611), and the roller (262) is made of hollow iron; a first signal transmitter (263) is fixed in one of the detection sections (2611) and is close to the roller (262), and the function of the first signal transmitter (263) is to control the stop of the rotating motor (124); three of the rollers (262) are in contact with the positioning block (230).

7. The method for extracting coffee using a grinding and extraction device as claimed in claim 6, characterized in that: As follows, step 1: pour coffee beans into the bean box (130); Step 2: insert the fixing block (260) into the guide rail groove (251) and the support spring (210), so that the inner groove of the fixing block (260) is sleeved on the outer cross section of the guide rail (250), and then fix the fixing block (260) on the guide rail (250) by bolts; Step 3: Control the electric telescopic rod (123) to extend and retract, and adjust the distance between the grinding knife (125) and the grinding groove (102), so as to adjust the coarseness of the ground coffee powder; Step 4: Start the rotary motor (124) to drive the grinding blade (125) to rotate and grind the coffee powder; Step 5: When the first iron ring (231) on the positioning block (230) contacts the three rollers (262) at the same time, the first signal transmitter (263) is powered on, and the first signal transmitter (263) transmits a signal to the rotating motor (124), thereby controlling the rotating motor (124) to be turned off; after grinding, the base (200) is reversed, the connection with the grinding cylinder (110) is disconnected, and then the bean box (240) is taken out.

8. A grinding and extraction device for coffee preparation as claimed in claim 6, characterized in that: A valve (127) is provided at the communication port between the bean guiding tube (122) and the bean guiding trough (101); a second iron ring (232) is also provided on the positioning block (230) and is located at the lower end of the first iron ring (231); a second signal transmitter (264) is fixed in one of the detection sections (2611), and the function of the second signal transmitter (264) is to control the closing of the valve (127); counters are installed in the first signal transmitter (263) and the second signal transmitter (264), and the counters are powered by themselves.

9. A grinding and extraction device for coffee preparation according to claim 8, characterized in that: The positioning block (230) is provided with threads, the inner cross-sections of the second iron ring (232) and the first iron ring (231) are provided with threads, and the second iron ring (232) and the first iron ring (231) are connected to the positioning block (230) via threads.

10. A grinding and extraction device for coffee preparation according to claim 9, characterized in that: An electromagnet (1131) is fixed inside the cylindrical block (113); the cylindrical block (113) comprises a connecting column (270), an iron plate (271) and a clamping block (272); the iron plate (271) is fixed at one end of the connecting column (270), and the other end passes through the cylindrical block (113) and is rotatably connected to the cylindrical block (113); the clamping block (272) is symmetrically fixed on the outer cross section of the iron plate (271); a clamping groove adapted to the clamping block (272) is formed at the lower end of the limit block (126); the first iron ring (231) also controls the closing of the electromagnet (1131); a second support plate (273) is fixed at the lower end of the connecting column (270), and the second support plate (273) is away from the connecting column (2 A scraper (274) is fixed at one end of the grinding cylinder (110), and the scraper (274) is in contact with the inner wall of the first inner cavity (103) of the grinding cylinder (110); a third iron ring (233) is also threadedly connected to the outer cross section of the positioning block (230), and the outer cross section of the third iron ring (233) is provided with a thin iron sheet, and a discharge device is installed in the third iron ring (233), and the third iron ring (233) is located between the second iron ring (232) and the first iron ring (231); a third signal transmitter (265) is fixed in one of the detection sections (2611), and the function of the third signal transmitter (265) is to control the start of the electromagnet (1131), and a counter is installed in the third signal transmitter (265), and the counter itself is powered.

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