Bean grinding device and coffee machine using same

Abstract

The utility model discloses a bean grinding device and a coffee machine with the bean grinding device, the bean grinding device comprises a bean bin assembly, a bean grinding assembly and a discharging pipe connected with a discharging port of the bean grinding assembly, and an outlet for coffee powder to pass through is formed in the end portion, away from the bean grinding assembly, of the discharging pipe; the bean grinding device further comprises a sealing cover capable of opening and closing the outlet, and the sealing cover is rotationally connected with the discharging pipe. Compared with the prior art, the bean grinding device has the advantages that the sealing cover capable of opening and closing the outlet is arranged at the outlet of the discharging pipe of the bean grinding device, so that the interior of the bean grinding device can be kept dry, the bean grinding quality is ensured, the reliability is high, coffee powder is prevented from being bonded, and the interior of the bean grinding device can be conveniently cleaned.

Description

Technical Field

[0001] The utility model relates to a beverage brewing device, in particular to a bean grinding device and a coffee machine using the bean grinding device. Background Art

[0002] With the changes in people's living habits and the improvement of their quality of life, more and more people have begun to accept and love coffee as a drink, so various coffee machines for home use have begun to appear in people's lives.

[0003] Currently commonly used coffee machines usually have a bean grinding device. For example, Chinese patent application number 202223499537.6 discloses a coffee powder static elimination structure used in a coffee bean grinder, which includes a bean grinding component and a static elimination component: the bean grinding component includes a coffee bean grinder body, and the surface of the coffee bean grinder body is connected to a discharge pipe; another example is Chinese patent application number 202123448135.9, which discloses a direct-fall powder grinding device, including a main body with a powder outlet at the bottom, a grinding assembly for grinding beans provided in the main body, and a powder outlet pipe provided on the main body, which is connected to the powder outlet.

[0004] In the aforementioned prior art coffee grinders, the discharge pipe remains open. If the discharge container at the discharge pipe outlet is simultaneously steaming during the grinding process, some of the steam generated by the steaming process may enter the grinding mechanism or bean hopper along the powder discharge channel, seriously affecting the quality of the ground beans. Alternatively, in a humid environment, moisture may enter the grinding mechanism or bean hopper along the powder discharge channel, also affecting the quality of the ground beans. Furthermore, if residual coffee grounds in the grinding mechanism or discharge pipe become damp and stick together, cleaning becomes more difficult.

[0005] Therefore, there is room for further improvement. Utility Model Content

[0006] The first technical problem to be solved by the present invention is to provide a bean grinding device to improve the reliability of bean grinding, ensure the quality of coffee powder, and facilitate cleaning in view of the shortcomings of the above-mentioned prior art.

[0007] The second technical problem to be solved by the present invention is to provide a coffee machine using the above-mentioned bean grinding device.

[0008] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: a bean grinding device, comprising a bean bin assembly, a bean grinding assembly, and a discharge pipe connected to the discharge port of the bean grinding assembly, wherein the end of the discharge pipe away from the bean grinding assembly forms an outlet for coffee powder to pass through; the characteristics are:

[0009] The bean grinding device further includes a sealing cover capable of opening and closing the outlet, and the sealing cover is rotatably connected to the discharge pipe.

[0010] By providing a cover that can open and close the outlet at the outlet of the discharge pipe of the bean grinding device, the inside of the bean grinding device can be kept dry, the quality of the ground beans is ensured, the reliability is high, the adhesion of coffee powder is avoided, and the inside of the bean grinding device can be easily cleaned.

[0011] Preferably, a rotating shaft seat and a rotating shaft are provided on the outer side of the tube wall of the discharge pipe, the rotating shaft seat is fixed to the discharge pipe, the rotating shaft is installed on the rotating shaft seat, and the cover is provided with a connecting hole for the rotating shaft to pass through, and the two ends of the rotating shaft pass through the connecting holes at corresponding positions respectively, thereby making the cover and the discharge pipe rotatably connected.

[0012] In order to prevent coffee powder from falling onto the cover, the rotating shaft seat is arranged on the top of the discharge pipe.

[0013] To ensure the sealing when the cover is closed, the cover includes a cover body and an annular flange formed around the cover body. When the cover is in a closed state, the cover body seals the outlet, and the flange covers the outer periphery of the discharge pipe wall.

[0014] The technical solution adopted by the present invention to solve the second technical problem is: a coffee machine, characterized in that: it uses the bean grinding device as described above.

[0015] Preferably, in order to facilitate receiving coffee powder, the coffee machine further includes a container for receiving the coffee powder discharged from the discharge pipe.

[0016] Preferably, to facilitate coffee extraction, the coffee machine further includes a housing, a water tank, a heating device, a water pump, and an extraction box serving as the container, wherein the water pump is used to pump water in the water tank into the heating device, and the heating device supplies hot water to the extraction box, and the extraction box can be mounted on the housing.

[0017] Furthermore, to facilitate portability of the coffee machine, the coffee machine also includes a first shell and a second shell, the first shell and the second shell are arranged up and down, the first shell is located above the second shell, the water tank is arranged in the second shell, the bottom of the first shell is at least partially recessed upward relative to the second shell, the extraction box is arranged in the recessed area of ​​the first shell, and the first shell and the second shell are rotatably connected so that the position of the extraction box is opposite to or offset from the water tank up and down.

[0018] Preferably, in order to make the coffee machine compact, the coffee machine also includes a shell, the water tank and the water pump are arranged in the shell, the water tank includes a box body and a water outlet interface arranged at the bottom of the box body, the water pump is arranged directly below the water tank, and the water outlet interface and the water pump are staggered.

[0019] Preferably, in order to avoid safety problems caused by damage or short circuit of electronic components inside the coffee machine, the water tank includes a box body and a heat-insulating layer arranged on the periphery of the box body.

[0020] Compared with the prior art, the advantages of the present invention are: by providing a cover that can open and close the outlet at the outlet of the discharge pipe of the bean grinding device, the inside of the bean grinding device can be kept dry, the quality of the ground beans is ensured, the reliability is high, the adhesion of coffee powder is avoided, and the inside of the bean grinding device can be easily cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a coffee machine according to an embodiment of the present invention (with the discharge pipe closed);

[0022] Figure 2 Schematic diagram of a discharge pipe and a sealing cover of a coffee machine according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the exploded structure of the discharge pipe and the sealing cover of the coffee machine according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of a coffee machine according to an embodiment of the present invention (with the discharge pipe closed);

[0025] Figure 5 This is a schematic diagram of the extraction state of the coffee machine according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the coffee machine according to an embodiment of the utility model, in which the first housing, the second housing and the container are hidden;

[0027] Figure 7 A side view of a coffee machine according to an embodiment of the present invention, wherein the first housing, the second housing and the container are hidden;

[0028] Figure 8 This is a schematic diagram of the exploded structure of the water tank of the coffee machine according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0031] See also Figures 1 to 8 A coffee machine includes a bean grinding device, a first shell 21, a second shell 22, a water tank 3, a heating device 4, a water pump 5 and an extraction box 6.

[0032] The first housing 21 and the second housing 22 are arranged vertically, with the first housing 21 positioned above the second housing 22. The first housing 21 and the second housing 22 are rotatably connected, employing a conventional rotatable connection structure, to form a housing. When in use, the second housing 22 is placed on a table, while the first housing 21 is rotatable relative to the second housing 22 about a vertical axis.

[0033] The bean grinding device includes a hopper assembly 11, a grinding assembly 12, and a discharge pipe 13. The grinding device is partially located within a first housing 21 and partially within a second housing 22. When the first housing 21 rotates relative to the second housing 22, the grinding device remains fixed relative to the second housing 22 and does not rotate with the first housing 21. The hopper assembly 11 is used to store coffee beans, and the grinding assembly 12 is used to grind the coffee beans into coffee powder. The hopper assembly 11 and the grinding assembly 12 can adopt existing structures and will not be described in detail here.

[0034] The discharge pipe 13 is connected to the discharge port (not shown) of the bean grinding assembly 12 so that the coffee powder ground by the bean grinding assembly 12 can be taken out. The connection position of the discharge pipe 13 and the bean grinding assembly 12 is lower than the bottom surface of the first housing 21 to avoid interference between the discharge pipe 13 and the first housing 21 when the first housing 21 rotates. The discharge pipe 13 extends from the inside of the second housing 22 to the outside of the second housing 22, and the coffee powder discharged from the discharge pipe 13 can be received by the container 100 provided outside the second housing 22. The container 100 can preferably directly adopt the extraction box 6, so that it can be installed in the first housing 21 after receiving the coffee powder. Alternatively, the container 100 can also be an ordinary cup-shaped container.

[0035] The end of the discharge pipe 13 located outside the second housing 22 forms an outlet 133 for the coffee powder to pass through. In order to prevent steam, moisture, etc. from entering the interior of the bean grinding device through the outlet 133 of the discharge pipe 13, the bean grinding device also includes a cover 14 that can open and close the outlet 133. The cover 14 is rotatably connected to the discharge pipe 13. A rotating shaft seat 131 and a rotating shaft 132 are provided on the outer side of the tube wall of the discharge pipe 13. The rotating shaft seat 131 can be fixed to the discharge pipe 13. The two can be connected to each other or formed as one piece. The rotating shaft 132 is installed on the rotating shaft seat 131. In addition, the rotating shaft seat 131 is located at the top of the discharge pipe 13, so that the cover 14 needs to be rotated upward when it is opened, thereby preventing the powder from the discharge pipe 13 from falling onto the cover 14. The cover 14 can optionally be made of a deformable flexible material, such as rubber. The cover 14 is provided with a connecting hole 141 for the rotating shaft 132 to pass through, and the two ends of the rotating shaft 132 pass through the connecting holes 141 at corresponding positions respectively, so that the cover 14 and the discharge pipe 13 are rotatably connected. The rotating shaft 132 can be rotated relative to the rotating shaft seat 131, while the cover 14 is fixed to the rotating shaft 132, or the rotating shaft 132 can be fixed to the rotating shaft seat 131, while the cover 14 and the rotating shaft 132 can rotate relative to each other. Preferably, in this embodiment, the axis of the rotating shaft 132 and the axis of the discharge pipe 13 are perpendicular to each other. The rotating shaft 132 can be a damping shaft, or the rotating shaft 132 and the cover 14 can be interference fit so that the cover 14 can stay at the desired angle when it is open. The cover 14 closes the outlet 133, see Figure 1 , the cover 14 opens the outlet 133, see Figure 4 .

[0036] The cover 14 includes a cover body 141 and an annular flange 143 formed around the cover body 142. When the cover 14 is in a closed state, the cover body 141 seals the outlet 1332, and the flange 143 is wrapped around the outer periphery of the discharge pipe 13, thereby achieving a good sealing effect and stabilizing the position of the cover 14.

[0037] When the bean grinding assembly 12 is grinding beans, the coffee powder generates static electricity, which can cause the coffee powder to be adsorbed to the discharge port of the bean grinding assembly 12 or the powder discharge pipe 13, making cleaning difficult and affecting the quality of the coffee powder. To eliminate static electricity, a wire (usually made of metal) can be installed on the powder discharge pipe 13 and connected to the ground terminal of the coffee machine's control circuit board (not shown); or hot water supplied by the heating device 4 can be sprayed into the bean hopper to humidify it.

[0038] The water tank 3, heating device 4, and water pump 5 are disposed within the second housing 22, while the extraction box 6 is disposed within the first housing 21. At least a portion of the bottom of the first housing 21 is recessed upward relative to the second housing 22, facilitating placement of the extraction box 6 within this recessed area. The extraction box 6 is positioned opposite the water tank 3. The heating device 4 and water tank 3 can be positioned adjacent to each other, below the grinding assembly 12. The water pump 5 pumps water from the water tank 3 into the heating device 4. After being heated by the heating device 4, the hot water is supplied to the extraction box 6, thereby extracting the coffee grounds within the extraction box 6. The extraction principle is similar to that of the prior art.

[0039] See also Figure 6 and Figure 7 The water tank 3 includes a housing 32 and a water outlet port 31 at the bottom of the housing 32, which is used to provide a conduit to connect the water outlet port 31 to the water inlet of the water pump 5. The water pump 5 is located directly below the water tank 3. The housing 32 is vertically positioned and roughly cylindrical, while the water pump 5 is horizontally positioned and roughly cylindrical. Here, "vertical" and "horizontally" refer to the direction in which the cylindrical axis extends, and "directly below" refers to the intersection of the two axes. The arrangement is similar when the housing 32 and water pump 5 have other regular shapes. To make the entire machine as compact as possible, it is necessary to reduce the distance between the water tank 3 and the water pump 5. Therefore, the water outlet port 31 is eccentrically positioned at the bottom of the housing 32. This staggers the water outlet port 31 and the water pump 5. When the water outlet port 31 extends downward, it is located to the side of the water pump 5, rather than opposite its highest point. This allows the top of the water pump 5 to be as close as possible to the bottom of the water tank 3 without interfering with it, keeping the overall height of the machine as small as possible. Alternatively, without reducing the overall height, the space utilization rate inside the first housing 21 and the second housing 22 can be improved. When the box body 32 and the water pump 5 are in other shapes, the water outlet interface 31 and the water pump 5 can also be staggered.

[0040] The water tank 3 also includes a lid 33 that covers the open top of the housing 32. The lid 33 is provided with a water inlet 34 for adding water. The second housing 22 is open at least at the location corresponding to the lid 33 and the water inlet 34. A water inlet plug 35 can be provided at the water inlet 34 to prevent water from evaporating, spilling, or foreign matter from entering the water tank 3. Because the temperature inside the coffee machine's housing is relatively high (due to heat dissipation from the heating device 4 and the hot water supply conduit leading from the heating device 4), the temperature of the water tank 3 is relatively low. This temperature difference between the water tank 3 and the interior of the housing can cause condensation on the outer walls of the water tank 3, which can easily short-circuit electronic components within the housing, causing component damage and potentially causing a short-circuit accident. Therefore, the water tank 3 also includes an insulation layer 36 disposed around the outer periphery of the housing 32 to provide insulation and prevent condensation from forming outside the water tank 3, thereby ensuring safety within the housing. The insulation layer 36 can be made from existing insulation materials, such as sponge.

[0041] The extraction box 6 is detachably connected to the first housing 21, so that it can be installed in the first housing 21 after receiving the coffee powder discharged from the discharge pipe 13, or a coffee capsule can be placed in the extraction box 6. When the extraction box 6 is installed on the first housing 21, it can rotate with the first housing 21, so that it can rotate relative to the second housing 22 before extraction, so that it is no longer opposite to the second housing 22. The bottom of the extraction box 6 is suspended in the air, see Figure 5 , so that the coffee in the extraction box 6 can be easily taken out during extraction. After the extraction is completed, the first housing 21 can be rotated again so that the extraction box 6 returns to the position opposite to the second housing 22. Figure 1 This reduces the overall size of the device, ensuring it doesn't take up too much space when not in use and making it easy to transport and carry. The aforementioned arrangement of the first housing 21, second housing 22, extraction box 6, and water tank 3 also facilitates adding water to the water tank 3. To add water, the extraction box 6 is rotated out of its position relative to the water tank 3, allowing the water inlet plug 35 to be opened and filled.

[0042] To facilitate outdoor portability, the coffee machine further includes a battery 7 for supplying power to the control circuit board, the bean grinding assembly 12, the heating device 4, the water pump 5, and the like.

Claims

1. A bean grinding device, comprising a bean bin assembly (11), a bean grinding assembly (12), and a discharge pipe (13) connected to a discharge port of the bean grinding assembly (12), wherein an end of the discharge pipe (13) away from the bean grinding assembly (12) forms an outlet (133) for coffee powder to pass through; characterized in that: The bean grinding device further comprises a sealing cover (14) capable of opening and closing the outlet (133), and the sealing cover (14) is rotatably connected to the discharge pipe (13).

2. The bean grinding device according to claim 1, characterized in that: A rotating shaft seat (131) and a rotating shaft (132) are provided on the outer side of the tube wall of the discharge tube (13); the rotating shaft seat (131) is fixed to the discharge tube (13); the rotating shaft (132) is installed on the rotating shaft seat (131); a connecting hole (141) for the rotating shaft (132) to pass through is provided on the cover (14); both ends of the rotating shaft (132) respectively pass through the connecting holes (141) at corresponding positions, thereby enabling the cover (14) and the discharge tube (13) to be rotatably connected.

3. The bean grinding device according to claim 2, characterized in that: The rotating shaft seat (131) is arranged on the top of the discharge pipe (13).

4. The bean grinding device according to claim 2, characterized in that: The sealing cover (14) includes a cover body (142) and an annular flange (143) formed around the cover body (142). When the sealing cover (14) is in a closed state, the cover body (142) closes the outlet (133), and the flange (143) is wrapped around the outer periphery of the discharge pipe (13).

5. A coffee machine, characterized in that: The bean grinding device according to any one of claims 1 to 4 is used.

6. The coffee machine according to claim 5, characterized in that: The coffee machine also includes a container for receiving coffee powder discharged from the discharge pipe (13).

7. The coffee machine according to claim 6, characterized in that: The coffee machine further comprises a housing, a water tank (3), a heating device (4), a water pump (5), and an extraction box (6) serving as the container. The water pump (5) is used to pump water in the water tank (3) into the heating device (4). The heating device (4) supplies hot water to the extraction box (6). The extraction box (6) can be mounted on the housing.

8. The coffee machine according to claim 7, wherein: The coffee machine further comprises a first housing (21) and a second housing (22), wherein the first housing (21) and the second housing (22) are arranged vertically, the first housing (21) being located above the second housing (22), the water tank (3) being arranged in the second housing (22), the bottom of the first housing (21) being at least partially recessed upward relative to the second housing (22), the extraction box (6) being arranged in the recessed area of ​​the first housing (21), and the first housing (21) and the second housing (22) being rotatably connected so that the extraction box (6) is positioned vertically relative to or offset from the water tank (3).

9. The coffee machine according to claim 7, wherein: The coffee machine further comprises a shell, wherein the water tank (3) and the water pump (5) are arranged in the shell, the water tank (3) comprises a box body (32) and a water outlet interface (31) arranged at the bottom of the box body (32), the water pump (5) is arranged directly below the water tank (3), and the water outlet interface (31) and the water pump (5) are arranged in a staggered manner.

10. The coffee machine according to claim 7, wherein: The water tank (3) comprises a tank body (32) and a heat-insulating layer (36) arranged on the outer periphery of the tank body (32).

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