Coffee maker

Abstract

The present application provides a kind of coffee machine, including shell, heating module, hot water pipe, grinding wheel structure, powder box, drive control mechanism, shell and floating block, grinding wheel structure includes outer grinding wheel and inner grinding wheel, inner grinding wheel is arranged in the grinding hole of outer grinding wheel, grinding wheel structure separates the inner cavity of shell into grinding chamber and brewing chamber, grinding hole between the outer grinding wheel and the outer wall of inner grinding wheel forms grinding wheel gap, drive control mechanism can control outer grinding wheel or inner grinding wheel rotation, heating module is arranged in shell, the water outlet of heating module is communicated with hot water pipe, the water outlet of hot water pipe is arranged in the upper portion of the inner cavity of shell and is communicated with grinding chamber, or, the water outlet of hot water pipe is arranged in the upper portion of powder box and is communicated with brewing chamber.The present application coffee machine integrates grinding and brewing, can be prepared multiple styles of coffee, improve user experience, ensure user health, and simple structure, low production cost.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment for brewing coffee, and in particular to a coffee machine that combines grinding and brewing. Background Technology

[0002] Traditional coffee machines utilize two separate mechanisms or two separate machines to grind and brew coffee, resulting in a complex structure and high production costs. In existing machines, the grinding mechanism connects to the brewing mechanism via a powder outlet. The grinding mechanism grinds the coffee beans into powder, which is then conveyed to the brewing mechanism for brewing. However, due to the steam generated by the brewing mechanism, the powder outlet is prone to moisture, affecting the taste of the brewed coffee. Moist powder can also accumulate in the outlet, causing poor dispensing and impacting the user experience. Furthermore, the accumulated moisture can breed bacteria, potentially harming the user's health. Summary of the Invention

[0003] To achieve the main objective of this invention, this invention provides a coffee machine that integrates grinding and brewing, can brew various types of coffee, enhances user experience, ensures user health, has a simple structure, and has low production costs.

[0004] To achieve the main objective of this invention, a coffee machine is provided, comprising a housing, a heating module, a hot water pipe, a grinding wheel structure, a powder container, a drive control mechanism, a housing, and a floating block. The housing has an inner cavity with openings at the top and bottom. A grinding wheel structure is disposed in the center of the inner cavity, comprising an outer grinding wheel and an inner grinding wheel. The inner grinding wheel is disposed within the grinding hole of the outer grinding wheel. The grinding wheel structure divides the inner cavity of the housing into a grinding chamber and a brewing chamber. The grinding chamber is located above the brewing chamber. A grinding wheel gap is formed between the grinding hole of the outer grinding wheel and the outer peripheral wall of the inner grinding wheel, connecting the grinding chamber and the brewing chamber. The drive control mechanism... The mechanism can control the rotation of the outer or inner grinding wheel. A floating block is located on the upper part of the housing, and the floating block is sealed to the upper part of the housing to form a grinding chamber with the grinding wheel structure. The upper part of the housing is provided with the feed inlet of the grinding chamber. The powder box is located on the lower part of the housing, and the edge ring plate of the powder box is sealed to the lower part of the housing. The powder box and the grinding wheel structure form a brewing chamber. The bottom of the powder box is provided with an extraction port. A heating module is provided inside the housing. The outlet of the heating module is connected to a hot water pipe. The outlet of the hot water pipe is located on the upper part of the inner cavity of the housing and is connected to the grinding chamber. Alternatively, the outlet of the hot water pipe is located on the upper part of the powder box and is connected to the brewing chamber.

[0005] Coffee beans are placed into the grinding chamber of the coffee machine's casing through the feed inlet. The drive control mechanism then rotates the outer or inner grinding wheel. The inner and outer grinding wheels work together to grind the coffee beans into coffee powder. The coffee powder enters the brewing chamber of the casing directly through the grinding hole of the outer grinding wheel and the outer peripheral wall of the inner grinding wheel. Because the rotating outer or inner grinding wheel exerts a downward squeezing force on the coffee powder, when the coffee powder in the brewing chamber is in a fluffy state and filled, it is compressed under the squeezing force of the rotating outer or inner grinding wheel, thereby achieving the density required for brewing coffee. After the grinding operation is completed, the drive control mechanism stops controlling the rotation of the outer or inner grinding wheel. Then, the heating module heats the water and supplies hot water to the hot water pipe. Since the outlet of the hot water pipe is connected to the grinding chamber or brewing chamber, when hot water is supplied to the grinding chamber, the hot water enters the brewing chamber through the gaps in the grinding wheel to brew the coffee powder and form coffee liquid. Alternatively, when hot water is directly supplied to the brewing chamber, the hot water penetrates the coffee powder in the brewing chamber to form coffee liquid, and the coffee liquid flows out from the extraction port connected to the brewing chamber.

[0006] Users can control the amount of coffee beans placed into the grinding chamber according to their personal needs. When there are fewer coffee beans in the grinding chamber, the loose coffee grounds will not fill the brewing chamber, so the inner grinding wheel will not exert a squeezing force on the coffee grounds in the brewing chamber, thus allowing for the brewing of Americano. When there are more coffee beans in the grinding chamber, the loose coffee grounds will fill the brewing chamber, and the inner grinding wheel will exert a squeezing force on the coffee grounds in the brewing chamber. The coffee grounds that are squeezed and become denser can be used to brew espresso.

[0007] This invention relates to a coffee machine that integrates an outer grinding wheel and an inner grinding wheel within a single housing. This design divides the housing's interior into a grinding chamber and a brewing chamber. A grinding wheel gap is formed between the grinding hole of the outer grinding wheel and the outer peripheral wall of the inner grinding wheel, connecting the grinding chamber and the brewing chamber. This allows coffee beans in the grinding chamber to be ground into coffee powder through the interaction of the inner and outer grinding wheels. The coffee powder directly enters the brewing chamber through the grinding wheel gap between the outer and inner grinding wheels, eliminating the need for a separate powder delivery channel. This avoids issues such as moisture affecting the taste, poor powder flow impacting user experience, and bacterial growth from powder accumulation, thus improving user experience and ensuring user health. Compared to existing coffee machines where grinding and brewing are performed by two separate mechanisms or machines, resulting in complex structures and high production costs, this invention integrates grinding and brewing into a single, simple, and compact design within a single housing, thereby reducing production costs. Furthermore, users can adjust the amount of coffee beans according to their individual needs. Depending on the amount of coffee beans used, the coffee machine of this invention can brew various types of coffee, thereby enhancing the user experience. In addition, before brewing coffee, the coffee machine of this invention can drive the control mechanism to rotate the outer or inner grinding wheel and supply hot water to the hot water pipe, thereby using clean water to rinse the grinding chamber, outer grinding wheel, inner grinding wheel and brewing chamber. The cleaning operation is convenient. The heating module can also be turned on at the same time to use hot water for rinsing, resulting in a better cleaning effect.

[0008] In a preferred embodiment, the coffee machine further includes a drive shaft, a linkage shaft, and a movement control mechanism. The drive shaft is rotatably supported on the housing, and the inner grinding wheel is fitted onto the drive shaft. The linkage shaft is rotatably supported on a floating block, and the floating block is movably supported within the housing. The movement control mechanism controls the floating block to move vertically, allowing the transmission end of the linkage shaft to engage or disengage with the drive end of the drive shaft. When the transmission end of the linkage shaft engages with the drive end of the drive shaft, the drive control mechanism controls the linkage shaft to drive the drive shaft and the inner grinding wheel to rotate vertically. The housing has a positioning groove, and the housing can be detachably placed into the positioning groove. The outlet of the hot water pipe is located on the floating block. When the floating block engages with the housing, the transmission end of the linkage shaft engages with the drive end of the drive shaft, and the hot water pipe is connected to the grinding chamber.

[0009] A further embodiment is that a first sealing ring is fitted around the outer periphery of the floating block, and an annular wall protrudes from the upper part of the housing above the grinding chamber. When the transmission end of the linkage shaft is connected to the driving end of the drive shaft, one end of the floating block is inserted into the annular wall, and the first sealing ring abuts against the inner peripheral wall of the annular wall; and / or, the linkage shaft is vertically movable and supported on the floating block, and a first limiting plate and a second limiting plate protrude from the outer peripheral wall of the linkage shaft. The first limiting plate and the second limiting plate are located at both ends of the floating block in the vertical direction, so as to limit the travel of the linkage shaft relative to the floating block in the vertical direction.

[0010] A further proposed solution is that the floating block has a through hole in the vertical direction, and the linkage shaft can move through the through hole in the vertical direction. The first limiting plate is located above the floating block, the second limiting plate is located below the floating block, the linkage shaft is fitted with a second sealing ring, the lower end face of the floating block is provided with a sealing groove, and the second sealing ring is fitted on the linkage shaft and located in the sealing groove.

[0011] A further embodiment is that the motion control mechanism includes a pressure rod, a crank, and a connecting rod. The pressure rod is located outside the housing, and one end of the pressure rod is provided with a first rotating shaft. The first rotating shaft passes through the housing and is hinged to the housing. The crank is located inside the housing, and the first end of the crank is connected to the first rotating shaft. The second end of the crank is provided with a second rotating shaft. The first end of the connecting rod is hinged to the second rotating shaft, and the second end of the connecting rod is connected to the floating block. Alternatively, the motion control mechanism is a moving cylinder, and the piston rod of the moving cylinder extends vertically and is connected to the floating block. Alternatively, the motion control mechanism includes a moving motor, a gear, and a rack. The gear is sleeved on the drive shaft of the moving motor, and the rack is disposed on the floating block and extends vertically, and the rack meshes with the gear.

[0012] A further embodiment is that the pressure rod is extended with a baffle, and when the transmission end of the linkage shaft is connected to the driving end of the drive shaft, the baffle abuts against the outer surface of the housing and the outer shell; and / or, the interior of the housing is provided with a first limiting groove extending in the vertical direction, and the lug of the floating block can be moved in the vertical direction and located in the first limiting groove; and / or, the interior of the housing is provided with a cover, and the floating block can be moved in the vertical direction to extend or retract into the cover, and the peripheral wall of the cover is provided with a second limiting groove extending in the vertical direction, and the lug of the floating block can be moved in the vertical direction to pass through the second limiting groove.

[0013] A further alternative is that the cross-section of the drive end of the drive shaft is irregularly shaped, and the transmission end of the linkage shaft has a corresponding hole, so that the drive end of the drive shaft can be inserted into the corresponding hole and receive the rotational driving force; and / or, the drive control mechanism is a drive motor, the cross-section of the drive shaft of the drive motor is irregularly shaped, and the receiving end of the linkage shaft has a corresponding hole, so that the drive end of the drive shaft can cooperate with the drive shaft of the drive motor to receive the rotational driving force.

[0014] A further embodiment includes a housing comprising a cover, a pressure roller ring, and a funnel shell. A drive shaft is rotatably supported on the cover in a vertical direction. The cover has a feed inlet, a first mounting groove, a second mounting groove, and a third mounting groove. The outer grinding wheel is detachably located in the first mounting groove. The pressure roller ring is detachably inserted into the second mounting groove and presses against the lower edge of the outer grinding wheel in a vertical direction. A third sealing ring is fitted around the top outer circumference of the pressure roller ring, and the third sealing ring abuts against the inner circumferential wall of the second mounting groove. A grinding chamber is formed between the outer grinding wheel and the upper cavity of the cover. The grinding ring of the outer grinding wheel is detachably located in the fourth mounting groove of the pressure roller ring. The outer peripheral wall of the powder box has a protruding annular disc, which is detachably located in the third mounting groove. The upper periphery of the powder box has an outward protruding annular plate, which can be located below the annular disc in the vertical direction. The inner cavity of the powder box and the outer grinding wheel form a brewing chamber. The bottom end face of the powder box has an extraction port. The annular shell of the funnel shell is detachably located in the third mounting groove and is fitted around the outer periphery of the powder box. The annular shell is threaded to the inner peripheral wall of the third mounting groove and presses against the annular plate in the vertical direction. The lower end face of the annular disc has an annular groove, in which a fourth sealing ring is embedded. The fourth sealing ring presses against the annular plate. The bottom of the funnel shell has a liquid outlet.

[0015] A further embodiment includes a housing comprising a cover, a pressure roller ring, and a funnel shell. A drive shaft is rotatably supported on the cover in a vertical direction. The cover has a feed inlet, a first mounting groove, a second mounting groove, and a third mounting groove. The outer grinding wheel is detachably located in the first mounting groove. The pressure roller ring is detachably inserted into the second mounting groove and presses against the lower edge of the outer grinding wheel in a vertical direction. A third sealing ring is fitted around the top outer circumference of the pressure roller ring, abutting against the inner circumferential wall of the second mounting groove. A grinding chamber is formed between the outer grinding wheel and the upper cavity of the cover. The grinding ring of the outer grinding wheel is detachably located in the fourth mounting groove of the pressure roller ring. A ring disc protrudes from the outer circumferential wall of the pressure roller ring and is detachable. The unloading area is located in the third mounting groove. The upper periphery of the powder box is provided with an annular plate protruding outward. The annular plate can be located below the annular plate in the vertical direction. The inner cavity of the powder box and the outer grinding wheel form a brewing chamber. The bottom end face of the powder box is provided with an extraction port. The annular shell of the funnel shell is detachably located in the third mounting groove and is fitted around the outer periphery of the powder box. The bottom end face of the annular shell can be pressed against the bottom end face of the positioning groove in the vertical direction, and the upper end face of the annular shell can be pressed against the annular plate in the vertical direction. The lower end face of the annular plate is provided with an annular groove, and a fourth sealing ring is embedded in the annular groove. The fourth sealing ring is pressed against the annular plate. The bottom of the funnel shell is provided with a liquid outlet. The floating block can be pressed against the top of the shell cover in the vertical direction.

[0016] A further improvement is that the coffee machine also includes a screw cap, which is connected to the drive shaft and located below the inner grinding wheel near the grinding wheel gap. The edge of the screw cap is provided with multiple teeth, which are arranged in the circumferential direction of the screw cap. The lower surface of each tooth is provided with an inclined surface facing the rotation direction of the inner grinding wheel.

[0017] As can be seen from the above scheme, the screw cap is connected to the drive shaft and located below the inner grinding wheel near the grinding wheel gap, which can fix the inner grinding wheel. The edge of the screw cap is provided with teeth. Since the teeth are located below the grinding wheel gap, the coffee powder squeezed out from the grinding wheel gap can be removed by the teeth in time and will not accumulate. When there is a lot of coffee powder, multiple teeth form a small annular space below the grinding wheel gap, which facilitates the extrusion of coffee powder. In addition, the lower surface of each tooth is provided with an inclined surface facing the rotation direction of the inner grinding wheel. The inclined surface has a downward squeezing effect on the coffee powder below it, which can make the coffee powder in the powder box more compact. Attached Figure Description

[0018] Figure 1 This is a first-view structural diagram of an embodiment of the coffee machine of the present invention.

[0019] Figure 2 This is a second-view structural diagram of an embodiment of the coffee machine of the present invention.

[0020] Figure 3 This is a first-view sectional view of an embodiment of the coffee machine of the present invention.

[0021] Figure 4 yes Figure 3 Enlarged view at point A.

[0022] Figure 5 This is a second-perspective sectional view of an embodiment of the coffee machine of the present invention.

[0023] Figure 6 This is a schematic diagram of the housing in a disassembled state in an embodiment of the coffee machine of the present invention.

[0024] Figure 7 This is a structural diagram of the coffee machine embodiment of the present invention with the housing in a disassembled state.

[0025] Figure 8 This is a cross-sectional view of the transmission end of the linkage shaft and the driving end of the drive shaft in an embodiment of the coffee machine of the present invention.

[0026] Figure 9 This is a first-view sectional view of the floating block structure in an embodiment of the coffee machine of the present invention.

[0027] Figure 10 This is a second-view sectional view of the floating block structure in an embodiment of the coffee machine of the present invention.

[0028] Figure 11 This is a first-view structural diagram of the floating block structure in an embodiment of the coffee machine of the present invention.

[0029] Figure 12 This is a second-view structural diagram of the floating block structure in an embodiment of the coffee machine of the present invention.

[0030] Figure 13This is a third-view sectional view of the floating block structure in an embodiment of the coffee machine of the present invention.

[0031] Figure 14 This is a first-view structural diagram of the housing structure in an embodiment of the coffee machine of the present invention.

[0032] Figure 15 This is a second-view structural diagram of the housing structure in an embodiment of the coffee machine of the present invention.

[0033] Figure 16 This is a first-view sectional view of the housing structure in an embodiment of the coffee machine of the present invention.

[0034] Figure 17 This is a second-perspective sectional view of the housing structure in an embodiment of the coffee machine of the present invention.

[0035] Figure 18 This is a cross-sectional view of another embodiment of the housing structure in the coffee machine embodiment of the present invention.

[0036] Figure 19 This is a structural diagram of another embodiment of the screw cap in the coffee machine of the present invention.

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0038] See Figures 1 to 5 as well as Figures 14 to 17This embodiment discloses a coffee machine 10, including a housing 11, a heating module 50, a hot water pipe 70, a grinding wheel structure, a powder box 124, a drive control mechanism, a housing 12, and a floating block 81. The housing 12 is provided with an inner cavity with openings at the top and bottom. A grinding wheel structure is provided in the middle of the inner cavity of the housing 12. The grinding wheel structure includes an outer grinding wheel 16 and an inner grinding wheel 15. The inner grinding wheel 15 is disposed in the grinding hole of the outer grinding wheel 16. The grinding wheel structure divides the inner cavity of the housing 12 into a grinding chamber 126 and a brewing chamber 127. The grinding chamber 126 is located above the brewing chamber 127. A grinding wheel gap 17 is formed between the grinding hole of the outer grinding wheel 16 and the outer peripheral wall of the inner grinding wheel 15. The grinding wheel gap 17 connects the grinding chamber 126 and the brewing chamber 127. The drive control mechanism can control the rotation of the outer grinding wheel 16 or the inner grinding wheel 15. In this embodiment, the floating block 81 is disposed on the upper part of the housing 12, and the floating block 81 is sealed to the upper part of the housing 12 to form a grinding chamber 126 with the grinding wheel structure. The upper part of the housing 12 is provided with a feed inlet 129 for the grinding chamber 126. The powder box 124 is disposed on the lower part of the housing 12, and the edge ring plate of the powder box 124 is sealed to the lower part of the housing 12. The powder box 124 and the grinding wheel structure form a brewing chamber 127. The bottom of the powder box 124 is provided with an extraction port 1241. Furthermore, in this embodiment, a heating module 50 is disposed inside the outer shell 11. The outlet of the heating module 50 is connected to a hot water pipe 70. The outlet of the hot water pipe 70 is disposed on the upper part of the inner cavity of the housing 12 and is connected to the grinding chamber 126. Alternatively, the outlet of the hot water pipe 70 is disposed on the upper part of the powder box 124 and is connected to the brewing chamber 127.

[0039] Coffee beans are placed into the grinding chamber 126 of the housing 12 of the coffee machine 10 through the feed inlet 129. Then, the drive control mechanism controls the outer grinding wheel 16 or the inner grinding wheel 15 to rotate. With the cooperation between the inner grinding wheel 15 and the outer grinding wheel 16, the coffee beans are ground into coffee powder. The coffee powder enters the brewing chamber 127 of the housing 12 directly through the grinding gap 17 formed between the grinding hole of the outer grinding wheel 16 and the outer peripheral wall of the inner grinding wheel 15. Since the rotating outer grinding wheel 16 or the inner grinding wheel 15 exerts a downward squeezing force on the coffee powder, when the coffee powder in the brewing chamber 127 is in a fluffy state and is full, the coffee powder is squeezed under the squeezing force of the rotating outer grinding wheel 16 or the inner grinding wheel 15, thereby achieving the density required for brewing coffee. After the grinding operation is completed, the drive control mechanism stops controlling the rotation of the outer grinding wheel 16 or the inner grinding wheel 15. Then, the heating module 50 heats the water and supplies hot water to the hot water pipe 70. Since the outlet of the hot water pipe 70 is connected to the grinding chamber 126 or the brewing chamber 127, when hot water is supplied to the grinding chamber 126, the hot water enters the brewing chamber 127 through the gap 17 of the grinding wheel to brew the coffee powder and form coffee liquid. Alternatively, when hot water is directly supplied to the brewing chamber 127, the hot water penetrates the coffee powder in the brewing chamber 127 to form coffee liquid, and the coffee liquid flows out from the extraction port 1241 connected to the brewing chamber 127.

[0040] Users can control the amount of coffee beans placed in the grinding chamber 126 according to their personal needs. When there are fewer coffee beans in the grinding chamber 126, the loose coffee powder will not fill the brewing chamber 127, so the inner grinding wheel 15 will not exert a squeezing force on the coffee powder in the brewing chamber 127, thus it can brew a weak Americano. When there are more coffee beans in the grinding chamber 126, the loose coffee powder can fill the brewing chamber 127, and the inner grinding wheel 15 can exert a squeezing force on the coffee powder in the brewing chamber 127. The coffee powder with higher density after being squeezed can brew a strong espresso.

[0041] In this embodiment, the coffee machine 10 has an outer grinding wheel 16 and an inner grinding wheel 15 inside a housing 12, dividing the inner cavity of the housing 12 into a grinding chamber 126 and a brewing chamber 127. A grinding wheel gap 17 is formed between the grinding hole of the outer grinding wheel 16 and the outer peripheral wall of the inner grinding wheel 15. This grinding wheel gap 17 connects the grinding chamber 126 and the brewing chamber 127. Thus, the coffee beans in the grinding chamber 126 are ground into coffee powder by the cooperation between the inner grinding wheel 15 and the outer grinding wheel 16. The coffee powder directly enters the brewing chamber 127 of the housing 12 through the grinding wheel gap 17 formed between the grinding hole of the outer grinding wheel 16 and the outer peripheral wall of the inner grinding wheel 15. There is no need to set up an additional powder outlet channel for coffee powder transportation, thereby avoiding the problems of coffee powder getting damp and affecting the taste, powder not being smooth and affecting the user experience, and powder accumulation easily breeding bacteria and affecting the user's health. This improves the user experience and ensures the user's health. Compared to existing coffee machines where grinding and brewing are performed by two different mechanisms or two separate machines, resulting in complex structures and high production costs, the coffee machine 10 in this embodiment integrates grinding and brewing within a single housing 12, resulting in a simple and compact structure and reduced production costs. Furthermore, users can adjust the amount of coffee beans according to their individual needs. Depending on the amount of coffee beans used, the coffee machine 10 in this embodiment can brew various types of coffee, thereby enhancing the user experience. In addition, before brewing, the coffee machine 10 in this embodiment can activate the drive control mechanism to rotate the outer grinding wheel 16 or the inner grinding wheel 15 and supply water to the hot water pipe 70, thereby using clean water to rinse the grinding chamber 126, the outer grinding wheel 16, the inner grinding wheel 15, and the brewing chamber 127. This cleaning operation is convenient. Alternatively, the heating module 50 can be activated simultaneously to use hot water for rinsing, resulting in a better cleaning effect.

[0042] Combination Figure 6 and Figure 7In this embodiment, the coffee machine 10 also includes a drive shaft 13, a linkage shaft 83, and a movement control mechanism. The drive shaft 13 is rotatably supported on the housing 12 in the vertical direction. The inner grinding wheel 15 is sleeved on the drive shaft 13. The floating block 81 is movably supported in the housing 11 in the vertical direction. The linkage shaft 83 is rotatably supported on the floating block 81 in the vertical direction. The movement control mechanism can control the floating block 81 to move in the vertical direction so that the transmission end 833 of the linkage shaft 83 is connected to or separated from the driving end 131 of the drive shaft 13. When the transmission end 833 of the linkage shaft 83 is connected to the driving end 131 of the drive shaft 13, the drive control mechanism can control the linkage shaft 83 to drive the drive shaft 13 and the inner grinding wheel 15 to rotate in the vertical direction. The housing 11 has a positioning groove 111, and the housing 12 can be detachably placed into the positioning groove 111. When the coffee machine 10 needs to brew coffee, the housing 12 is placed into the positioning groove 111 of the outer shell 11. The movement control mechanism controls the floating block 81 to drive the linkage shaft 83 to move downward in the vertical direction, so that the transmission end 833 of the linkage shaft 83 is connected to the driving end 131 of the drive shaft 13. Then the drive control mechanism can control the linkage shaft 83 to drive the drive shaft 13 and the inner grinding wheel 15 to rotate in the vertical direction. When it is necessary to clean the grinding chamber 126, outer grinding wheel 16, inner grinding wheel 15 and brewing chamber 127 in the housing 12, or to put coffee beans into the grinding chamber 126, the movement control mechanism controls the floating block 81 to drive the linkage shaft 83 to move upward in the vertical direction, so that the transmission end 833 of the linkage shaft 83 is separated from the driving end 131 of the drive shaft 13. Then the housing 12 can be taken out from the positioning groove 111 of the outer shell 11 for easy bean loading and cleaning.

[0043] To ensure the sealing of the grinding chamber 126, a first sealing ring 86 is fitted around the outer periphery of the floating block 81 in this embodiment. An annular wall 128 protrudes from the housing 12 above the grinding chamber 126. When the transmission end 833 of the linkage shaft 83 aligns with the driving end 131 of the drive shaft 13, one end of the floating block 81 is inserted into the annular wall 128, and the first sealing ring 86 abuts against the inner circumferential wall of the annular wall 128, thus sealing the floating block 81 at the feed inlet 129 of the grinding chamber 126. To further improve the sealing of the grinding chamber 126, the outlet of the hot water pipe 70 is located on the floating block 81 and connected to the grinding chamber 126 via the feed inlet 129. When the transmission end 833 of the linkage shaft 83 aligns with the driving end 131 of the drive shaft 13, the hot water pipe 70 is connected to the grinding chamber 126.

[0044] The drive control mechanism is a drive motor 60. The drive shaft 61 of the drive motor 60 has an irregular cross-section. The receiving end 834 of the linkage shaft 83 has a corresponding hole. The receiving end 834 of the linkage shaft 83 can cooperate with the drive shaft 61 of the drive motor 60 to receive rotational driving force. The drive end 131 of the drive shaft 13 also has an irregular cross-section, and the transmitting end 833 of the linkage shaft 83 has a corresponding hole. The drive end 131 of the drive shaft 13 can be inserted into the corresponding hole to receive rotational driving force. Specifically, in conjunction with... Figures 8 to 13 In this embodiment, the drive control mechanism is a drive motor 60, which is installed inside the housing 11. The drive shaft 61 of the drive motor 60 has a polygonal cross-section. The receiving end 834 of the linkage shaft 83 has a second polygonal hole 8341. The second polygonal hole 8341 can be movably fitted onto the outer periphery of the drive shaft 61 of the drive motor 60 in the vertical direction and receives the rotational driving force. The transmission of the rotational driving force is stable and reliable. In addition, in this embodiment, the drive end 131 of the drive shaft 13 has a polygonal cross-section, and the transmitting end 833 of the linkage shaft 83 has a first polygonal hole 8331. The drive end 131 of the drive shaft 13 can be inserted into the first polygonal hole 8331 and receive the rotational driving force. The transmission of the rotational driving force is stable and reliable.

[0045] To prevent the polygonal hole 8341 of the receiving end 834 of the linkage shaft 83 from having an excessively long vertical travel relative to the drive shaft 61 of the drive motor 60, which would affect the reception of the rotational driving force, in this embodiment, the linkage shaft 83 can be movably supported on the floating block 81 in the vertical direction. A first limiting plate 831 and a second limiting plate 832 are protruding from the outer peripheral wall of the linkage shaft 83. The first limiting plate 831 and the second limiting plate 832 are located at opposite ends of the floating block 81 in the vertical direction, thereby limiting the vertical travel of the linkage shaft 83 relative to the floating block 81. This splits the separation travel between the transmission end 833 of the linkage shaft 83 and the drive end 131 of the drive shaft 13 into the travel of the linkage shaft 83 relative to the floating block 81 and the travel of the polygonal hole 8341 of the receiving end 834 of the linkage shaft 83 relative to the drive shaft 61 of the drive motor 60. In other words, a longer travel is split into two shorter travels, thereby improving the reliability and stability of the operation.

[0046] Specifically, in this embodiment, the floating block 81 has a through hole 812 extending vertically, and the linkage shaft 83 can move vertically through the through hole 812. The first limiting plate 831 is located above the floating block 81, and the second limiting plate 832 is located below the floating block 81. To avoid leakage between the through hole 812 and the linkage shaft 83 and to improve the sealing of the grinding chamber 126, a second sealing ring 84 is fitted on the linkage shaft 83 in this embodiment. A sealing groove (not shown) is formed on the lower end face of the floating block 81, and the second sealing ring 84 is fitted on the linkage shaft 83 and located in the sealing groove.

[0047] The movement control mechanism can be a movement cylinder, with its piston rod extending vertically and connected to the floating block 81, thereby controlling the movement of the floating block 81 in the vertical direction. Alternatively, the movement control mechanism can include a movement motor, a gear, and a rack, with the gear sleeved on the drive shaft of the movement motor, and the rack disposed on the floating block 81 and extending vertically, meshing with the gear to control the movement of the floating block 81 in the vertical direction. Specifically, the motion control mechanism in this embodiment includes a pressure rod 20, a crank 23, and a connecting rod 25. The pressure rod 20 is located outside the housing 11, and one end of the pressure rod 20 is provided with a first rotating shaft 22. The first rotating shaft 22 passes through the housing 11 and is hinged to the housing 11. The crank 23 is located inside the housing 11, and the first end of the crank 23 is connected to the first rotating shaft 22. The second end of the crank 23 is provided with a second rotating shaft 24. The first end of the connecting rod 25 is hinged to the second rotating shaft 24, and the second end of the connecting rod 25 is connected to the floating block 81. Thus, by controlling the pressure rod 20, the first rotating shaft 22 is driven to rotate hinged to the housing 11, and the crank 23 and the connecting rod 25 are used to drive the floating block 81 to move in the vertical direction.

[0048] To improve the safety of the coffee machine 10 during operation, in this embodiment, the pressure lever 20 is extended and equipped with a baffle 21. When the transmission end 833 of the linkage shaft 83 is connected to the driving end 131 of the drive shaft 13, the baffle 21 abuts against the outer surfaces of the housing 12 and the outer shell 11. Figure 4 As shown, when the baffle 21 abuts against the outer surfaces of the housing 12 and the outer shell 11, it indicates that the transmission end 833 of the linkage shaft 83 and the drive end 131 of the drive shaft 13 have been connected. The user can then start the coffee machine 10 to begin the coffee brewing operation. Thus, by observing the position of the baffle 21, the user can quickly identify the status of the coffee machine 10, avoiding accidental operation that could lead to safety issues. When the transmission end 833 of the linkage shaft 83 and the drive end 131 of the drive shaft 13 are separated, as... Figure 6 and Figure 7 As shown, at this time, the baffle 21 is away from the outer surface of the outer shell 11, and the shell 12 can be removed from the positioning groove 111 of the outer shell 11.

[0049] To ensure the stability and reliability of the vertical movement of the floating block 81, and to ensure precise docking between the transmission end 833 of the linkage shaft 83 and the driving end 131 of the drive shaft 13, the housing 11 of this embodiment is provided with a first limiting groove 112 extending in the vertical direction. The lug 811 of the floating block 81 can be moved in the vertical direction and located in the first limiting groove 112. The housing 11 of this embodiment is provided with a cover 87. The floating block 81 can be moved in the vertical direction and extend or retract into the cover 87. The peripheral wall of the cover 87 is provided with a second limiting groove 871 extending in the vertical direction. The lug 811 of the floating block 81 can be moved in the vertical direction and pass through the second limiting groove 871.

[0050] Combination Figures 14 to 17 In this embodiment, the housing 12 includes a cover 121, a pressure ring 122, and a funnel shell 125. The drive shaft 13 is rotatably supported on the cover 121. The cover 121 has a feed inlet 129, a first mounting groove (not shown), a second mounting groove (not shown), and a third mounting groove (not shown). The outer grinding wheel 16 is detachably located in the first mounting groove. The pressure ring 122 is detachably inserted into the second mounting groove and presses against the lower edge 161 of the outer grinding wheel 16 in the vertical direction. A third sealing ring 123 is sleeved on the top outer periphery of the pressure ring 122. The third sealing ring 123 can abut against the inner peripheral wall of the second mounting groove. A grinding chamber 126 is formed between the outer grinding wheel 16 and the upper cavity of the cover 121. Meanwhile, in this embodiment, the grinding ring of the outer grinding wheel 16 is detachably located in the fourth mounting groove of the pressure wheel ring 122. The outer peripheral wall of the pressure wheel ring 122 is provided with a ring disk 1221, which is detachably located in the third mounting groove. The upper periphery of the powder box 124 is provided with a ring plate 1242 protruding outward. The ring plate 1242 can be located below the ring disk 1221 in the vertical direction. The inner cavity of the powder box 124 and the outer grinding wheel 16 form a brewing chamber 127. The bottom end face of the powder box 124 is provided with an extraction port 1241. Furthermore, in this embodiment, the annular shell of the funnel shell 125 is detachably located within the third mounting groove and fitted around the outer periphery of the powder box 124. The annular shell of the funnel shell 125 is threadedly connected to the inner circumferential wall of the third mounting groove and presses against the annular plate 1242 in the vertical direction. An annular groove (not shown) is provided on the lower end face of the annular plate 1221, and a fourth sealing ring 1210 is embedded in the annular groove. The fourth sealing ring 1210 presses against the annular plate 1242. A liquid outlet 1251 is provided at the bottom of the funnel shell 125. After the housing 12 is removed from the positioning groove 111 of the outer shell 11, the threaded funnel shell 125 can be removed from the housing cover 121, and the powder box 124, pressure roller ring 122, and outer grinding roller 16 can be removed from the housing cover 121, thereby facilitating the cleaning of each component and improving the cleaning effect.

[0051] Furthermore, the coffee machine 10 in this embodiment also includes a spring 14 and a screw cap 18. The inner grinding wheel 15 is vertically movable and sleeved on the drive shaft 13. The spring 14 is sleeved on the drive shaft 13 and is located vertically above the inner grinding wheel 15, with both ends of the spring 14 pressing against the housing 12 and the inner grinding wheel 15. The screw cap 18 is located below the inner grinding wheel 15 away from the spring 14 and is threadedly connected to the drive shaft 13. The threaded screw cap 18 can be removed from the drive shaft 13, thereby allowing the inner grinding wheel 15 to be removed from the drive shaft 13 for easy cleaning and improved cleaning effect. In addition, the threaded connection position of the screw cap 18 and the drive shaft 13 can be adjusted to adjust the vertical position of the inner grinding wheel 15, thereby adjusting the width of the grinding wheel gap 17 formed between the outer peripheral wall of the inner grinding wheel 15 and the grinding hole of the outer grinding wheel 16, and thus adjusting the coarseness of the ground powder.

[0052] See Figure 18Another embodiment of the shell structure, namely the shell 12′, includes a shell cover 121′, a pressure roller ring 122′, and a funnel shell 125′. The drive shaft 13 is rotatably supported on the shell cover 121′ in the vertical direction. The shell cover 121′ has a feed inlet 129′, a first mounting groove, a second mounting groove, and a third mounting groove. The outer grinding wheel 16 is detachably located in the first mounting groove, and the pressure roller ring 122′ is detachably inserted into the second mounting groove and presses against the outer grinding wheel in the vertical direction. On the lower edge 161' of the outer grinding wheel 16, a third sealing ring 123' is fitted around the top outer periphery of the pressure wheel ring 122'. The third sealing ring 123' can abut against the inner peripheral wall of the second mounting groove. A grinding chamber 126 is formed between the outer grinding wheel 16 and the upper cavity of the housing 121'. The grinding ring of the outer grinding wheel 16 is detachably located in the fourth mounting groove of the pressure wheel ring 122'. A ring disc 1221' is protruding from the outer peripheral wall of the pressure wheel ring 122'. The ring disc 1221' is detachably located in the third mounting groove. Inside the mounting slot, a ring plate 1242' protrudes outward from the upper periphery of the powder box 124. The ring plate 1242' can be located below the ring disc 1221' in the vertical direction. A brewing chamber 127 is formed between the inner cavity of the powder box 124 and the outer grinding wheel 16. An extraction port 1241 is opened through the bottom end face of the powder box 124. The ring shell of the funnel shell 125' is detachably located in the third mounting slot and fitted around the outer periphery of the powder box 124. The bottom end face of the ring shell of the funnel shell 125' is vertically... The upper end face of the funnel shell 125′ is pressed against the bottom surface of the positioning groove 111 in the vertical direction, and the upper end face of the annular shell of the funnel shell 125′ is pressed against the annular plate 1242′ in the vertical direction. The lower end face of the annular plate 1221′ is provided with an annular groove, and the annular groove is embedded with a fourth sealing ring 1210′. The fourth sealing ring 1210′ is pressed against the annular plate 1242′. The bottom of the funnel shell 125′ is provided with a liquid outlet 1215′, and the floating block 81 can press against the top of the shell cover 121′ in the vertical direction. When the housing 12′ structure is placed into the positioning groove 111 of the outer shell 11, the bottom end face of the annular shell of the funnel shell 125′ of the housing 12′ structure presses against the bottom end face of the positioning groove 111 in the vertical direction. Then, the floating block 81 is controlled to move downward in the vertical direction and press against the top of the shell cover 121′ of the housing 12′ structure, thereby stabilizing the housing 12′ structure as a whole in the positioning groove 111 of the outer shell 11. The fourth sealing ring 1210′ is pressed tightly by the ring plate 1242′ and the ring disc 1221′ on both the upper and lower sides, achieving the function of sealing the edge of the powder box 124 with water. After the housing 12′ structure is removed from the positioning groove 111 of the outer shell 11, the funnel shell 125′ can be directly pulled off the shell cover 121′, and the powder box 124, the pressure roller ring 122′ and the outer grinding wheel 16 can be disassembled from the shell cover 121′, thereby facilitating the cleaning of each component and improving the cleaning effect.

[0053] See Figure 19Another embodiment of the screw cap is that the screw cap 18′ is threadedly connected to the drive shaft 131 through its central threaded hole 182 and is located below the inner grinding wheel 15 near the grinding wheel gap 17. The edge of the screw cap 18′ is provided with a plurality of gear teeth 181, which are arranged in the circumferential direction of the screw cap 18′. The lower surface of each gear tooth 181 is provided with an inclined surface 1811 facing the rotation direction of the inner grinding wheel 15. Therefore, in this embodiment, the screw cap 18′ is threadedly connected to the drive shaft 131 through its central threaded hole 182 and is located below the inner grinding wheel 15 near the grinding wheel gap 17, which can fix the inner grinding wheel 15. The edge of the screw cap 18′ is provided with teeth 181. Since the teeth 181 are located below the grinding wheel gap 17, the coffee powder squeezed out from the grinding wheel gap 17 can be cleared by the teeth 181 in time and will not accumulate. When there is a lot of coffee powder, multiple teeth 181 form a small annular space below the grinding wheel gap 17, which facilitates the extrusion of coffee powder. In addition, the lower surface of each tooth 181 is provided with an inclined surface 1811 facing the rotation direction of the inner grinding wheel 15. The inclined surface 1811 has a downward squeezing effect on the coffee powder below it, which can make the coffee powder in the powder box more compact.

[0054] The above embodiments are merely preferred examples of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles of the present invention in accordance with the claims of the present invention should be included in the scope of the present invention patent application.

Claims

1. A coffee machine, comprising a casing, a heating module, a hot water pipe, a grinding wheel structure, a powder container, and a drive control mechanism, characterized in that, It also includes a housing and a floating block. The housing has an inner cavity with openings at the top and bottom. The grinding wheel structure is located in the middle of the inner cavity of the housing. The grinding wheel structure includes an outer grinding wheel and an inner grinding wheel. The inner grinding wheel is disposed in the grinding hole of the outer grinding wheel. The grinding wheel structure divides the inner cavity of the housing into a grinding chamber and a brewing chamber. The grinding chamber is located above the brewing chamber. A grinding wheel gap is formed between the grinding hole of the outer grinding wheel and the outer peripheral wall of the inner grinding wheel. The grinding wheel gap connects the grinding chamber and the brewing chamber. The drive control mechanism can control the rotation of the outer grinding wheel or the inner grinding wheel. The floating block is disposed on the upper part of the housing, and the floating block is sealed to the upper part of the housing and forms the grinding chamber with the grinding wheel structure. The upper part of the housing is provided with the feed inlet of the grinding chamber. The powder box is disposed on the lower part of the housing, and the edge ring plate of the powder box is sealed to the lower part of the housing. The powder box and the grinding wheel structure form the brewing chamber. The bottom of the powder box is provided with an extraction port. The heating module is installed inside the outer shell. The outlet of the heating module is connected to the hot water pipe. The outlet of the hot water pipe is located in the upper part of the inner cavity of the shell and is connected to the grinding chamber. Alternatively, the outlet of the hot water pipe is located in the upper part of the powder box and is connected to the brewing chamber.

2. The coffee machine according to claim 1, characterized in that: The coffee machine also includes a drive shaft, a linkage shaft, and a movement control mechanism. The drive shaft is rotatably supported on the housing in a vertical direction. The inner grinding wheel is sleeved on the drive shaft. The linkage shaft is rotatably supported on the floating block in a vertical direction. The floating block is movably supported inside the housing in a vertical direction. The movement control mechanism can control the floating block to move in the vertical direction so that the transmission end of the linkage shaft can be connected to or separated from the driving end of the drive shaft. When the transmission end of the linkage shaft is connected to the driving end of the drive shaft, the drive control mechanism can control the linkage shaft to drive the drive shaft and the inner grinding wheel to rotate in the vertical direction. The outer casing has a positioning groove, and the outer casing can be detachably placed into the positioning groove. The outlet of the hot water pipe is located on the floating block. When the floating block is engaged with the outer casing, the transmission end of the linkage shaft is connected to the driving end of the drive shaft, and the hot water pipe is connected to the grinding chamber.

3. The coffee machine according to claim 2, characterized in that: The outer periphery of the floating block is fitted with a first sealing ring, and the housing is provided with an annular wall protruding above the grinding chamber. When the transmission end of the linkage shaft is connected to the driving end of the drive shaft, one end of the floating block is inserted into the annular wall, and the first sealing ring abuts against the inner peripheral wall of the annular wall. And / or, the linkage shaft is vertically movable and supported on the floating block, and the outer peripheral wall of the linkage shaft is provided with a first limiting plate and a second limiting plate, which are respectively located at both ends of the floating block in the vertical direction to limit the travel of the linkage shaft relative to the floating block in the vertical direction.

4. The coffee machine according to claim 3, characterized in that: The floating block has a through hole in the vertical direction, and the linkage shaft can move through the through hole in the vertical direction. The first limiting plate is located above the floating block, and the second limiting plate is located below the floating block. A second sealing ring is fitted on the linkage shaft, and a sealing groove is opened on the lower end face of the floating block. The second sealing ring is fitted on the linkage shaft and located in the sealing groove.

5. The coffee machine according to claim 2, characterized in that: The motion control mechanism includes a pressure rod, a crank, and a connecting rod. The pressure rod is located outside the housing, and one end of the pressure rod is provided with a first rotating shaft. The first rotating shaft passes through the housing and is hinged to the housing. The crank is located inside the housing, and the first end of the crank is connected to the first rotating shaft. The second end of the crank is provided with a second rotating shaft. The first end of the connecting rod is hinged to the second rotating shaft, and the second end of the connecting rod is connected to the floating block. Alternatively, the movement control mechanism is a movement cylinder, wherein the piston rod of the movement cylinder extends vertically and is connected to the floating block; Alternatively, the motion control mechanism includes a motion motor, a gear, and a rack, with the gear sleeved on the drive shaft of the motion motor, the rack disposed on the floating block and extending in the vertical direction, and the rack meshing with the gear.

6. The coffee machine according to claim 5, characterized in that: The pressure rod is extended and provided with a baffle. When the transmission end of the linkage shaft is connected to the driving end of the drive shaft, the baffle abuts against the outer surface of the housing and the outer shell. And / or, the interior of the housing is provided with a first limiting groove extending in the vertical direction, and the lug of the floating block is movably located in the first limiting groove in the vertical direction; And / or, the interior of the housing is provided with a cover, the floating block can extend or retract into the cover in a vertical direction, the peripheral wall of the cover is provided with a second limiting groove extending in a vertical direction, and the lug of the floating block can move through the second limiting groove in a vertical direction.

7. The coffee machine according to claim 2, characterized in that: The cross-section of the drive end of the drive shaft is irregularly shaped, and the transmission end of the linkage shaft is provided with a corresponding hole. The drive end of the drive shaft can be inserted into the corresponding hole and receive rotational driving force. And / or, the drive control mechanism is a drive motor, the cross-section of the drive shaft of the drive motor is irregularly shaped, the receiving end of the linkage shaft is provided with a corresponding hole, and the receiving end of the linkage shaft can cooperate with the drive shaft of the drive motor to receive rotational driving force.

8. The coffee machine according to claim 2, characterized in that: The housing includes a cover, a pressure roller ring, and a funnel shell. The drive shaft is rotatably supported on the cover in a vertical direction. The cover has the feed inlet, a first mounting groove, a second mounting groove, and a third mounting groove. The outer grinding wheel is detachably located in the first mounting groove. The pressure roller ring is detachably inserted into the second mounting groove and presses against the lower edge of the outer grinding wheel in a vertical direction. A third sealing ring is fitted around the top outer periphery of the pressure roller ring. The third sealing ring abuts against the inner peripheral wall of the second mounting groove. The grinding chamber is formed between the outer grinding wheel and the upper cavity of the cover. The grinding ring of the outer grinding wheel is detachably located in the fourth mounting groove of the pressure wheel ring. The outer peripheral wall of the pressure wheel ring is provided with a ring disk protruding outward. The ring disk is detachably located in the third mounting groove. The upper periphery of the powder box is provided with a ring plate protruding outward. The ring plate can be located below the ring disk in the vertical direction. The brewing chamber is formed between the inner cavity of the powder box and the outer grinding wheel. The extraction port is opened through the bottom end face of the powder box. The annular shell of the funnel shell is detachably located in the third mounting groove and sleeved on the outer periphery of the powder box. The annular shell is threadedly connected to the inner peripheral wall of the third mounting groove and presses against the ring plate in the vertical direction. The lower end face of the ring plate is provided with an annular groove, and a fourth sealing ring is embedded in the annular groove. The fourth sealing ring presses against the ring plate. The bottom of the funnel shell is provided with a liquid outlet.

9. The coffee machine according to claim 2, characterized in that: The housing includes a cover, a pressure roller ring, and a funnel shell. The drive shaft is rotatably supported on the cover in a vertical direction. The cover has the feed inlet, a first mounting groove, a second mounting groove, and a third mounting groove. The outer grinding wheel is detachably located in the first mounting groove. The pressure roller ring is detachably inserted into the second mounting groove and presses against the lower edge of the outer grinding wheel in a vertical direction. A third sealing ring is fitted around the top outer periphery of the pressure roller ring. The third sealing ring abuts against the inner peripheral wall of the second mounting groove. The grinding chamber is formed between the outer grinding wheel and the upper cavity of the cover. The grinding ring of the outer grinding wheel is detachably located in the fourth mounting groove of the pressure wheel ring. The outer peripheral wall of the pressure wheel ring is provided with a ring disk protruding outward. The ring disk is detachably located in the third mounting groove. The upper periphery of the powder box is provided with a ring plate protruding outward. The ring plate can be located below the ring disk in the vertical direction. The brewing chamber is formed between the inner cavity of the powder box and the outer grinding wheel. The extraction port is opened through the bottom end face of the powder box. The annular shell of the funnel shell is detachably located in the third mounting groove and sleeved on the outer periphery of the powder box. The bottom end face of the annular shell can abut against the bottom end face of the positioning groove in the vertical direction, and the upper end face of the annular shell abuts against the ring plate in the vertical direction. The lower end face of the annular disc has an annular groove, and a fourth sealing ring is embedded in the annular groove. The fourth sealing ring abuts against the ring plate. The bottom of the funnel shell is provided with a liquid outlet. The floating block can abut against the top of the shell cover in the vertical direction.

10. The coffee machine according to any one of claims 2 to 9, characterized in that: The coffee machine also includes a screw cap, which is connected to the drive shaft and located below the inner grinding wheel near the grinding wheel gap. The edge of the screw cap is provided with multiple teeth, which are arranged in the circumferential direction of the screw cap. The lower surface of each tooth is provided with an inclined surface facing the rotation direction of the inner grinding wheel.

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