Coffee machine

Abstract

The utility model discloses a coffee machine, which comprises a machine base (1), a powder cup mechanism (2), a powder feeding mechanism (3) and a brewing mechanism (4), and is characterized in that the powder cup mechanism (2) comprises a cylindrical powder cup (21), a liquid outlet head (22) and a first lifting device (23) for driving the powder cup (21) to lift between an initial position and a powder withdrawing position; the powder feeding mechanism (3) comprises a powder feeding pipe (31) and a first translation device (32) for driving the powder feeding pipe (31) to translate between an initial position and a powder feeding position; the brewing mechanism (4) comprises a brewing head (41) and a second lifting device (42) used for driving the brewing head (41) to ascend and descend among the initial position, the powder returning position and the brewing position. Compared with the prior art, the coffee machine is compact in structure, coffee powder is not easy to scatter when the coffee machine works, and dregs of pressed powder are not easy to fall off.

Description

Technical Field

[0001] The utility model relates to the technical field of beverage brewing equipment, in particular to a coffee machine. Background Art

[0002] As the technologies related to household appliances and coffee machines become increasingly sophisticated, coffee machines can not only automatically perform operations such as grinding, filling, pressing, brewing, and removing residues, realizing automated control of the entire coffee brewing process and simplifying user operations, but the taste of the brewed coffee is also getting better and better.

[0003] For example, the Chinese patent application number CN201910115400.X, "A brewing seat assembly and a coffee machine having the brewing seat assembly," discloses a coffee machine. When working, a brewing cup filled with coffee powder is first loaded into the brewing cup holder located in the initial position, and then a driving device drives the brewing cup holder to swing to a position facing the brewing plug. The brewing plug is then pressed down into the brewing cup to brew the coffee. After brewing is completed, the brewing plug returns to its original position, and the push plate in the brewing cup moves upward to push out the residue. Finally, the driving device drives the brewing cup holder to swing to the initial position.

[0004] However, in the above solution, first, only the powder cup swings during operation, which takes up a large space; second, the brewing cup swings during the process of switching from the powder feeding state to the brewing state, which easily causes the coffee powder to be scattered; third, during the powder withdrawal process, the powder cake is pushed out by the push plate and moves relative to the brewing cup, which easily causes the coffee grounds to fall. Utility Model Content

[0005] The first technical problem to be solved by the present invention is to provide a coffee machine with a compact structure in view of the current status of the existing technology.

[0006] The second technical problem to be solved by the present invention is to provide a coffee machine in which coffee powder is not easily scattered during operation.

[0007] The third technical problem to be solved by the present invention is to provide a coffee machine in which powder cakes are not easy to fall off during operation.

[0008] The technical solution adopted by the present invention to solve the first, second and third technical problems is: a coffee machine comprising a machine base and a powder cup mechanism, a powder feeding mechanism and a brewing mechanism mounted on the machine base, characterized in that:

[0009] The powder cup mechanism includes a cylindrical powder cup, a liquid discharge head disposed opposite the bottom opening of the powder cup, and a first lifting device for driving the powder cup to move up and down between an initial position and a powder ejection position. When the powder cup is in the initial position, the bottom opening of the powder cup is blocked by the liquid discharge head. When the powder cup is in the powder ejection position, the powder cup is separated from the liquid discharge head, forming a gap between the powder cup and the liquid discharge head.

[0010] The powder feeding mechanism includes a powder feeding pipe and a first translation device for driving the powder feeding pipe to translate between an initial position and a powder feeding position. When the powder feeding pipe is in the powder feeding position, the outlet of the powder feeding pipe faces the top opening of the powder cup.

[0011] The brewing mechanism includes a brewing head arranged opposite to the top opening of the powder cup and a second lifting device for driving the brewing head to rise and fall between an initial position and a brewing position. The brewing head also has a powder ejection position located between the initial position and the brewing position. When the brewing head is in the brewing position, the brewing head extends into the powder cup and is pressed tightly against the top of the coffee powder.

[0012] In the powder feeding state, the powder cup is in the initial position, the powder feeding tube is in the powder feeding position, and the brewing head leaves the brewing position;

[0013] In the brewing state, the powder cup is in the initial position, the powder feed pipe leaves the powder feed position, and the brewing head is in the brewing position;

[0014] In the powder ejection state, the powder cup is in the powder ejection position, the powder feed pipe leaves the powder feed position, and the brewing head is in the powder ejection position.

[0015] In order to drive the powder cup to move up and down between the initial position and the powder ejection position, the first lifting device includes

[0016] A vertically arranged first rack is fixed relative to the powder cup;

[0017] a first gear meshing with the first rack;

[0018] A first driving member, used for driving the first gear to rotate;

[0019] A first protrusion is fixed relative to the powder cup; and

[0020] The first limit switch and the second limit switch each have a contact matched with the first protrusion;

[0021] When the powder cup is in the initial position, the first protrusion triggers the contact of the first limit switch;

[0022] When the powder cup is in the powder ejection position, the first protrusion triggers the contact of the second limit switch.

[0023] In order to avoid interference between the top of the powder inlet tube and the brewing head, at least a portion of the powder inlet tube gradually approaches the powder cup from top to bottom.

[0024] In order to drive the powder feeding pipe to translate between the initial position and the powder feeding position, the first translation device includes

[0025] A second rack arranged horizontally and fixed relative to the powder inlet pipe;

[0026] a second gear meshing with the second rack;

[0027] A second driving member, used for driving the second gear to rotate;

[0028] The second protrusion and the third protrusion are both fixed relative to the powder inlet pipe; and

[0029] a third limit switch and a fourth limit switch, each having a contact matched with the second protrusion and the third protrusion;

[0030] When the powder inlet pipe is in the initial position, the second protrusion triggers the contact of the third limit switch;

[0031] When the powder feeding pipe is in the powder feeding position, the third protrusion triggers the contact of the fourth limit switch.

[0032] In order to drive the brewing head to rise and fall between the initial position, the powder ejection position and the brewing position, the top of the brewing head is provided with a screw rod coaxially arranged with the brewing head;

[0033] The second lifting device includes

[0034] a third gear, rotatably connected to the machine base and threadedly connected to the outer periphery of the screw rod;

[0035] a fourth gear meshing with the third gear;

[0036] a third driving member, configured to drive the fourth gear to rotate;

[0037] a fourth protrusion fixed relative to the brewing head; and

[0038] The fifth limit switch and the sixth limit switch each have a contact that cooperates with the fourth protrusion;

[0039] When the brewing head is in the initial position, the fourth protrusion triggers the contact of the fifth limit switch;

[0040] When the brewing head is in the powder ejection position, the fourth protrusion triggers the contact of the sixth limit switch.

[0041] In order to realize automatic powder pushing, a powder pushing mechanism is also included, which includes a powder pushing plate arranged opposite to the gap and a second translation device for driving the powder pushing plate to translate between an initial position and a final position. When the powder pushing plate is in the initial position, the powder pushing plate is located outside the gap and close to the first side of the gap. When the powder pushing plate is in the final position, the powder pushing plate extends into the gap and close to the second side of the gap.

[0042] In order to drive the powder pushing plate to translate between the initial position and the final position, the second translation device includes

[0043] A third rack arranged horizontally and fixed relative to the powder pushing plate;

[0044] a fifth gear meshing with the third rack;

[0045] a fourth driving member, configured to drive the fifth gear to rotate;

[0046] The fifth protrusion and the sixth protrusion are both fixed relative to the powder pushing plate; and

[0047] a seventh limit switch and an eighth limit switch, each having a contact matched with the fifth protrusion and the sixth protrusion;

[0048] When the powder pushing plate is in the initial position, the fifth protrusion triggers the contact of the seventh limit switch;

[0049] When the powder pushing plate is in the final position, the sixth protrusion triggers the contact of the eighth limit switch.

[0050] In order to achieve stable lifting and lowering of the powder cup and the brewing head, the machine base is provided with a vertically arranged guide rod, the periphery of the powder cup is provided with a first guide block that cooperates with the guide rod for guidance, and the periphery of the brewing head is provided with a second guide block that cooperates with the guide rod for guidance.

[0051] In order to improve the guiding stability, there are two guide rods and they are arranged side by side. There are two first guide blocks and they are symmetrically arranged around the powder cup and correspond one-to-one to the guide rods. There are two second guide blocks and they are symmetrically arranged around the brewing head and correspond one-to-one to the guide rods.

[0052] In order to improve the aesthetics, in the powder-removing state, the end surface of the bottom of the powder cup is flush with the bottom surface of the brewing head.

[0053] Compared with the prior art, the advantages of the present invention are:

[0054] (1) During the operation of the coffee machine, the powder cup, the powder feed tube and the brewing head all move relative to each other to realize the functions of powder feeding, powder pressing, brewing and powder return. The structure is compact and occupies little space.

[0055] (2) When the coffee machine switches from the powder feeding state to the brewing state, the powder cup is fixed, and the powder feeding tube and the brewing head move relative to the powder cup to realize the powder feeding and powder pressing brewing functions, so that the coffee powder is not easily spilled;

[0056] (3) When the coffee machine switches from the brewing state to the powder return state, the powder cake is fixed, and the powder cup and the brewing head move relative to the powder cake to realize the powder return function, so that the powder cake is not easy to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the coffee machine of the present invention in an initial state;

[0058] Figure 2 for Figure 1 A longitudinal sectional view of the vehicle (viewed from front to rear);

[0059] Figure 3 for Figure 1 A longitudinal sectional view in the other direction (viewed from the left rear to the right front);

[0060] Figure 4 for Figure 1 A longitudinal cross-sectional view in the other direction (viewed from rear to front);

[0061] Figure 5 for Figure 1 A longitudinal cross-sectional view of the coffee machine after switching to the powder feeding state (viewed from the front to the back);

[0062] Figure 6 for Figure 1 A longitudinal cross-sectional view of the coffee machine after switching to the brewing mode (viewed from the front to the rear);

[0063] Figure 7 for Figure 1 A longitudinal cross-sectional view of the coffee machine after switching to the powder withdrawal state (viewed from the front to the back). DETAILED DESCRIPTION

[0064] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0065] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0066] like Figures 1 to 7 FIG. 1 is a preferred embodiment of the coffee machine of the present invention, which comprises a base 1 and a powder cup mechanism 2, a powder feeding mechanism 3, a brewing mechanism 4 and a powder pushing mechanism 5 mounted on the base 1.

[0067] The machine base 1 has two guide rods 11 arranged side by side, one in front and one behind, and each guide rod 11 is arranged vertically.

[0068] The powder cup mechanism 2 comprises a powder cup 21, a liquid dispensing head 22, and a first lifting mechanism 23. Specifically, the powder cup 21 is cylindrical, with two first guide blocks 211 symmetrically arranged on the front and rear sides of the powder cup 21, corresponding one to the guide rods 11. Each first guide block 211 slides up and down over its corresponding guide rod 11, guiding it. The liquid dispensing head 22 is mounted on the machine base 1, facing the bottom opening of the powder cup 21. The first lifting mechanism 23 is used to drive the powder cup 21 between an initial position and a powder ejection position.

[0069] In this embodiment, the first lifting device 23 includes a first rack 231, a first gear 232, a first driving member 233, a first protrusion 234, a first limit switch 235, and a second limit switch 236. Specifically, the first rack 231 is vertically arranged on the rear side wall of the first guide block 211 at the rear side of the powder cup 21; the first gear 232 is rotatably connected to the machine base 1 and meshes with the first rack 231; the first driving member 233 is a motor mounted on the machine base 1, with its power output end coaxially connected to the first gear 232 for driving the first gear 232 to rotate; the first protrusion 234 is protruding from the front side wall of the first guide block 211 at the front side of the powder cup 21; the first limit switch 235 and the second limit switch 236 are arranged on the machine base 1, one below the other, and each has a contact point that engages with the first protrusion 234.

[0070] When the powder cup 21 is in the initial position, the bottom opening of the powder cup 21 is blocked by the liquid discharge head 22, and the first protrusion 234 triggers the contact of the first limit switch 235; when the powder cup 21 is in the powder ejection position, the powder cup 21 is separated from the liquid discharge head 22 and a gap 210 is formed between the powder cup 21 and the liquid discharge head 22, and the first protrusion 234 triggers the contact of the second limit switch 236.

[0071] The powder feeding mechanism 3 includes a powder feeding pipe 31 and a first translation device 32. Specifically, the powder feeding pipe 31 gradually approaches the powder cup 21 from top to bottom; the first translation device 32 is used to drive the powder feeding pipe 31 to translate between the initial position and the powder feeding position.

[0072] In this embodiment, the first translation device 32 includes a second rack 321 , a second gear 322 , a second driving member 323 , a second protrusion 324 , a third protrusion 325 , a third limit switch 326 and a fourth limit switch 327 . Specifically, the second rack 321 is arranged horizontally and can be slidably installed on the machine base 1 left and right. The side wall of the bottom end of the powder inlet pipe 31 is connected to the left end of the second rack 321; the second gear 322 is rotatably connected to the machine base 1 and meshes with the second rack 321; the second driving member 323 is a motor, which is installed on the machine base 1, and its power output end is coaxially connected to the second gear 322 for driving the second gear 322 to rotate; the second protrusion 324 is protruded on the end wall at the right end of the second rack 321; the third protrusion 325 is protruded on the bottom wall at the right end of the second rack 321; the third limit switch 326 is installed on the machine base 1 and is located to the right of the second rack 321, and has a contact that cooperates with the second protrusion 324; the fourth limit switch 327 is installed on the machine base 1 and is located below the second rack 321, and has a contact that cooperates with the third protrusion 325.

[0073] When the powder inlet pipe 31 is in the initial position, the outlet of the powder inlet pipe 31 is away from the top opening of the powder cup 21, and the second protrusion 324 triggers the contact of the third limit switch 326; when the powder inlet pipe 31 is in the powder feeding position, the outlet of the powder inlet pipe 31 is opposite to the top opening of the powder cup 21, and the third protrusion 325 triggers the contact of the fourth limit switch 327.

[0074] The brewing mechanism 4 includes a brewing head 41 and a second lifting device 42. Specifically, the brewing head 41 is positioned directly opposite the top opening of the powder cup 21. Two second guide blocks 411 corresponding to the guide rods 11 are symmetrically arranged on the front and rear sides of the brewing head 41. Each second guide block 411 is slidably mounted on a corresponding guide rod 11 to guide and cooperate with the guide rod 11. A screw rod 412 is coaxially arranged with the brewing head 41 at the top of the brewing head 41. The second lifting device 42 is used to drive the brewing head 41 to move between an initial position, a powder withdrawal position, and a brewing position, with the powder withdrawal position being located between the initial position and the brewing position.

[0075] In this embodiment, the second lifting device 42 includes a third gear 421, a fourth gear 422, a third driving member 423, a fourth protrusion 424, a fifth limit switch 425, and a sixth limit switch 426. Specifically, the third gear 421 is rotatably connected to the machine base 1 and is threadedly connected to the outer periphery of the screw rod 412; the fourth gear 422 is rotatably connected to the machine base 1 and meshes with the third gear 421; the third driving member 423 is a motor installed on the machine base 1, and its power output end is coaxially connected to the fourth gear 422 for driving the fourth gear 422 to rotate; the fourth protrusion 424 is protruding from the side wall of the top of the brewing head 41; the fifth limit switch 425 and the sixth limit switch 426 are arranged on the machine base 1 one above the other, and each has a contact that cooperates with the fourth protrusion 424.

[0076] When the brewing head 41 is in the initial position, the brewing head 41 is away from the powder cup 21, and the fourth protrusion 424 triggers the contact of the fifth limit switch 425; when the brewing head 41 is in the brewing position, the brewing head 41 extends into the powder cup 21 and is pressed tightly on the top of the coffee powder; when the brewing head 41 is in the powder ejection position, the fourth protrusion 424 triggers the contact of the sixth limit switch 426.

[0077] The powder pushing mechanism 5 includes a powder pushing plate 51 and a second translation device 52. Specifically, the powder pushing plate 51 is positioned opposite the gap 210, and its end surface is a circular arc surface that matches the inner circumference of the powder cup 21. The second translation device 52 is used to drive the powder pushing plate 51 to translate between an initial position and a final position.

[0078] In this embodiment, the second translation device 52 includes a third rack 521 , a fifth gear 522 , a fourth driving member 523 , a fifth protrusion 524 , a sixth protrusion 525 , a seventh limit switch 526 and an eighth limit switch 527 . Specifically, the third rack 521 is arranged horizontally and can be slidably installed on the machine base 1 left and right. The above-mentioned powder pushing plate 51 is connected to the left end of the third rack 521; the fifth gear 522 is rotatably connected to the machine base 1 and meshes with the third rack 521; the fourth driving member 523 is a motor, installed on the machine base 1, and its power output end is coaxially connected to the fifth gear 522 for driving the fifth gear 522 to rotate; the fifth protrusion 524 is protruded on the end wall of the right end of the third rack 521; the sixth protrusion 525 is protruded on the top wall of the right end of the third rack 521; the seventh limit switch 526 is installed on the machine base 1 and is located to the right of the third rack 521, and has a contact that cooperates with the fifth protrusion 524; the eighth limit switch 527 is installed on the machine base 1 and is located above the third rack 521, and has a contact that cooperates with the sixth protrusion 525.

[0079] When the powder pushing plate 51 is in the initial position, the powder pushing plate 51 is located outside the gap 210 and close to the right side of the gap 210, and the fifth protrusion 524 triggers the contact of the seventh limit switch 526; when the powder pushing plate 51 is in the final position, the powder pushing plate 51 extends into the gap 210 and close to the left side of the gap 210, and the sixth protrusion 525 triggers the contact of the eighth limit switch 527.

[0080] In the initial state, if Figures 1 to 4 As shown, the powder cup 21 is in the initial position, the powder inlet pipe 31 is in the initial position, the brewing head 41 is in the initial position, and the powder pushing plate 51 is in the initial position;

[0081] In the powder feeding state, if Figure 5 As shown, the powder cup 21 is in the initial position, the powder feed pipe 31 is in the powder feeding position, the brewing head 41 is in the initial position, and the powder pusher 51 is in the initial position. At this time, coffee powder can be fed into the powder cup 21 through the powder feed pipe 31;

[0082] In the brewing state, Figure 6 As shown, the powder cup 21 is in the initial position, the powder inlet pipe 31 is in the initial position, the brewing head 41 is in the brewing position, and the powder pushing plate 51 is in the initial position. At this time, the coffee powder is pressed into a powder cake by the brewing head 41, and hot water can be injected into the powder cup 21 through the brewing head 41 to achieve brewing;

[0083] In the powder-removing state, Figure 7 As shown, the powder cup 21 is in the powder ejection position, the powder inlet tube 31 is in the initial position, and the brewing head 41 is in the powder ejection position. At this time, the end surface of the bottom of the powder cup 21 is flush with the bottom surface of the brewing head 41, and the powder pushing plate 51 can be moved from the initial position to the final position to push the powder cake out.

[0084] In addition, the entire coffee machine can be tilted 20° to the left to facilitate the ejection of powder cakes and the flow of residual waste water in the system to the waste water box.

[0085] The present invention also provides a method for controlling the coffee machine, comprising the following steps:

[0086] Before the coffee machine works, it is in the initial state. Figures 1 to 4 As shown, the powder cup 21 is in the initial position, the powder inlet pipe 31 is in the initial position, the brewing head 41 is in the initial position, and the powder pushing plate 51 is in the initial position;

[0087] When the coffee machine is working:

[0088] Step 1: Add powder:

[0089] Start the second driving member 323 to drive the second gear 322 to rotate forward, thereby driving the powder feeding pipe 31 to move left synchronously through the second rack 321 until the third protrusion 325 triggers the contact of the fourth limit switch 327. At this time, Figure 5 As shown, the powder inlet pipe 31 is in the powder inlet position, and the outlet of the powder inlet pipe 31 is facing the top opening of the powder cup 21. When the coffee machine is switched to the powder inlet state, coffee powder can be fed into the powder cup 21 through the powder inlet pipe 31;

[0090] After powder feeding is completed, the second driving member 323 is activated to drive the second gear 322 to reverse, thereby driving the second rack 321 to move rightward until the second protrusion 324 triggers the contact of the third limit switch 326. At this time, the powder feed pipe 31 returns to its initial position, and the outlet of the powder feed pipe 31 is away from the top opening of the powder cup 21, thereby making way for subsequent operations.

[0091] Step 2: Press powder and brew:

[0092] The third driving member 423 is started to drive the fourth gear 422 to rotate forward, thereby driving the third gear 421 to rotate, and then driving the brewing head 41 to move downward synchronously through the screw rod 412 until the brewing head 41 is inserted into the powder cup 21 and pressed tightly against the top of the coffee powder (when the brewing head 41 presses the coffee powder, the tighter it presses, the greater the current of the corresponding motor will be. The motor current can be detected to determine whether the brewing head 41 has moved to the brewing position). During this process, the coffee powder is pressed into a powder cake by the brewing head 41. At this time, Figure 6 As shown, the brewing head 41 is in the brewing position, and the coffee machine is switched to the brewing state, and hot water can be injected into the powder cup 21 through the brewing head 41 to achieve brewing;

[0093] Step 3: Retrieve fans and promote fans:

[0094] After brewing is completed, the third driving member 423 is first activated to drive the fourth gear 422 to reverse, thereby driving the third gear 421 to rotate, and then driving the brewing head 41 to move upward synchronously through the screw rod 412 until the fourth protrusion 424 triggers the contact of the sixth limit switch 426. During this process, the brewing head 41 gradually separates from the powder cake. At this time, the brewing head 41 is in the powder ejection position, and the coffee machine switches to the powder ejection state;

[0095] Then, the first driving member 233 is activated to drive the first gear 232 to rotate in the reverse direction, thereby driving the powder cup 21 to move upward synchronously via the first rack 231 until the first protrusion 234 triggers the contact of the second limit switch 236. During this process, the powder cup 21 gradually separates from the powder cake sandwiched between the brewing head 41 and the liquid discharge head 22. At this time, the powder cup 21 is in the powder ejection position, and the bottom end surface of the powder cup 21 is flush with the bottom surface of the brewing head 41.

[0096] Then, the fourth driving member 523 is started to drive the fifth gear 522 to rotate in the reverse direction, thereby driving the powder pushing plate 51 to move leftward through the third rack 521 until the sixth protrusion 525 triggers the contact of the eighth limit switch 527. During this process, the powder pushing plate 51 extends into the gap 210 to push out the powder cake placed above the liquid discharge head 21. At this time, Figure 7 As shown, the powder pushing plate 51 is in the final position;

[0097] After the powder pushing is completed, the fourth driving member 523 is activated to drive the fifth gear 522 to rotate forward, thereby driving the powder pushing plate 51 to move rightward through the third rack 521 until the fifth protrusion 524 triggers the contact of the seventh limit switch 526. At this time, the powder pushing plate 51 returns to the initial position, making way for subsequent operations.

[0098] Finally, the first driving member 233 is activated to drive the first gear 232 to rotate forward, thereby driving the powder cup 21 to move downward synchronously through the first rack 231 until the first protrusion 234 triggers the contact of the first limit switch 235. At this time, the powder cup 21 returns to the initial position. At the same time, the third driving member 423 is activated to drive the fourth gear 422 to rotate counterclockwise, thereby driving the third gear 421 to rotate. In turn, the brewing head 41 is driven to rise synchronously through the screw rod 412 until the fourth protrusion 424 triggers the contact of the fifth limit switch 425. At this time, the brewing head 41 returns to the initial position and the coffee machine returns to the initial state.

[0099] Note: During the powder withdrawal process, the brewing head 41 can be moved up first, and then the powder cup 21 can be moved up, or the brewing head 41 and the powder cup 21 can be moved up at the same time.

[0100] In the above scheme:

[0101] First, during operation of the coffee machine, the powder cup 21, the powder feed tube 31, and the brewing head 41 all move relative to each other to achieve powder feeding, powder pressing, brewing, and powder withdrawal functions. The structure is compact, occupies little space, and is suitable for home use.

[0102] Second, when the coffee machine switches from the powder feeding state to the brewing state, the powder cup 21 is fixed, and the powder feeding tube 31 and the brewing head 41 move relative to the powder cup 21 to realize the powder feeding and powder pressing brewing functions, so that the coffee powder is not easily scattered;

[0103] Third, when the coffee machine switches from the brewing state to the powder return state, the powder cake is fixed, and the powder cup 21 and the brewing head 41 move relative to the powder cake to realize the powder return function, so that the powder cake is not easy to fall off.

Claims

1. A coffee machine comprising a base (1) and a powder cup mechanism (2), a powder feeding mechanism (3) and a brewing mechanism (4) mounted on the base (1), characterized in that: The powder cup mechanism (2) comprises a cylindrical powder cup (21), a liquid discharge head (22) arranged opposite to the bottom opening of the powder cup (21), and a first lifting device (23) for driving the powder cup (21) to move up and down between an initial position and a powder ejection position. When the powder cup (21) is in the initial position, the bottom opening of the powder cup (21) is blocked by the liquid discharge head (22). When the powder cup (21) is in the powder ejection position, the powder cup (21) is separated from the liquid discharge head (22) and a gap (210) is formed between the powder cup (21) and the liquid discharge head (22). The powder feeding mechanism (3) includes a powder feeding pipe (31) and a first translation device (32) for driving the powder feeding pipe (31) to translate between an initial position and a powder feeding position. When the powder feeding pipe (31) is in the powder feeding position, the outlet of the powder feeding pipe (31) faces the top opening of the powder cup (21); The brewing mechanism (4) includes a brewing head (41) arranged opposite to the top opening of the powder cup (21) and a second lifting device (42) for driving the brewing head (41) to move up and down between an initial position and a brewing position. The brewing head (41) also has a powder ejection position located between the initial position and the brewing position. When the brewing head (41) is in the brewing position, the brewing head (41) extends into the powder cup (21) and is pressed against the top of the coffee powder. In the powder feeding state, the powder cup (21) is in the initial position, the powder feeding tube (31) is in the powder feeding position, and the brewing head (41) leaves the brewing position; In the brewing state, the powder cup (21) is in the initial position, the powder feeding tube (31) leaves the powder feeding position, and the brewing head (41) is in the brewing position; In the powder ejection state, the powder cup (21) is in the powder ejection position, the powder feed pipe (31) leaves the powder feed position, and the brewing head (41) is in the powder ejection position.

2. The coffee machine according to claim 1, wherein: The first lifting device (23) includes a vertically arranged first rack (231) fixed relative to the powder cup (21); a first gear (232) meshing with the first rack (231); A first driving member (233) is used to drive the first gear (232) to rotate; A first protrusion (234) is fixed relative to the powder cup (21); and A first limit switch (235) and a second limit switch (236), both having contacts that match the first protrusion (234); When the powder cup (21) is in the initial position, the first protrusion (234) triggers the contact of the first limit switch (235); When the powder cup (21) is in the powder ejection position, the first protrusion (234) triggers the contact of the second limit switch (236).

3. The coffee machine according to claim 1, wherein: At least a portion of the powder inlet pipe (31) gradually approaches the powder cup (21) from top to bottom.

4. The coffee machine according to claim 1, wherein: The first translation device (32) includes a horizontally arranged second rack (321) fixed relative to the powder inlet pipe (31); A second gear (322) meshing with the second rack (321); A second driving member (323) is used to drive the second gear (322) to rotate; The second protrusion (324) and the third protrusion (325) are both fixed relative to the powder inlet pipe (31); and A third limit switch (326) and a fourth limit switch (327), each having a contact point matched with the second protrusion (324) and the third protrusion (325); When the powder feeding pipe (31) is in the initial position, the second protrusion (324) triggers the contact of the third limit switch (326); When the powder feeding pipe (31) is in the powder feeding position, the third protrusion (325) triggers the contact of the fourth limit switch (327).

5. The coffee machine according to claim 1, wherein: The top of the brewing head (41) is provided with a screw rod (412) coaxially arranged with the brewing head (41); The second lifting device (42) includes A third gear (421) is rotatably connected to the machine base (1) and is threadedly connected to the outer periphery of the screw rod (412); a fourth gear (422) meshing with the third gear (421); a third driving member (423), configured to drive the fourth gear (422) to rotate; a fourth protrusion (424) fixed relative to the brewing head (41); as well as The fifth limit switch (425) and the sixth limit switch (426) both have contacts that match the fourth protrusion (424); When the brewing head (41) is in the initial position, the fourth protrusion (424) triggers the contact of the fifth limit switch (425); When the brewing head (41) is in the powder ejection position, the fourth protrusion (424) triggers the contact of the sixth limit switch (426).

6. The coffee machine according to claim 1, wherein: The invention also includes a powder pushing mechanism (5), which includes a powder pushing plate (51) arranged opposite to the gap (210) and a second translation device (52) for driving the powder pushing plate (51) to translate between an initial position and a final position. When the powder pushing plate (51) is in the initial position, the powder pushing plate (51) is located outside the gap (210) and close to a first side of the gap (210). When the powder pushing plate (51) is in the final position, the powder pushing plate (51) extends into the gap (210) and close to a second side of the gap (210).

7. The coffee machine according to claim 6, characterized in that: The second translation device (52) includes a horizontally arranged third rack (521) fixed relative to the powder pushing plate (51); a fifth gear (522) meshing with the third rack (521); a fourth driving member (523), configured to drive the fifth gear (522) to rotate; The fifth protrusion (524) and the sixth protrusion (525) are both fixed relative to the powder pushing plate (51); as well as The seventh limit switch (526) and the eighth limit switch (527) have contacts that match the fifth protrusion (524) and the sixth protrusion (525), respectively; When the powder pushing plate (51) is in the initial position, the fifth protrusion (524) triggers the contact of the seventh limit switch (526); When the powder pushing plate (51) is in the final position, the sixth protrusion (525) triggers the contact of the eighth limit switch (527).

8. The coffee machine according to any one of claims 1 to 7, characterized in that: The machine base (1) is provided with a vertically arranged guide rod (11), the periphery of the powder cup (21) is provided with a first guide block (211) which is in cooperation with the guide rod (11), and the periphery of the brewing head (41) is provided with a second guide block (411) which is in cooperation with the guide rod (11).

9. The coffee machine according to claim 8, characterized in that: The number of the guide rods (11) is two and they are arranged side by side. The number of the first guide blocks (211) is two and they are symmetrically arranged around the powder cup (21) and correspond one-to-one with the guide rods (11). The number of the second guide blocks (411) is two and they are symmetrically arranged around the brewing head (41) and correspond one-to-one with the guide rods (11).

10. The coffee machine according to any one of claims 1 to 7, characterized in that: In the powder-removing state, the end surface of the bottom of the powder cup (21) is flush with the bottom surface of the brewing head (41).

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