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), a brewing mechanism (4) and a liquid discharging mechanism (5), and is characterized in that the powder cup mechanism (2) comprises a cylindrical powder cup (21) and a first lifting device (22) for driving the powder cup (21) to lift; the powder feeding mechanism (3) comprises a powder feeding pipe (312) and a first translation device (32) for driving the powder feeding pipe (312) to translate; 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. And the liquid outlet mechanism (5) comprises a liquid outlet head (51) and a second translation device (52) for driving the liquid outlet head (51) to translate. 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, and specifically refers to a coffee machine. Background Art

[0002] With the increasing perfection of the related technologies of household appliances and coffee machines, coffee machines can not only automatically perform operations such as grinding, powder loading, powder pressing, brewing, and residue cleaning, realizing the automatic control of the entire coffee brewing process and simplifying the operation of users, but also the taste of the brewed coffee is getting better and better.

[0003] For example, the Chinese patent "A Brewing Seat Assembly and a Coffee Machine with the Brewing Seat Assembly" with the patent application number CN201910115400.X discloses a coffee machine. During operation, first, a brewing cup filled with coffee powder is loaded into the brewing cup bracket at the initial position, then the driving device drives the brewing cup bracket to swing to a position directly opposite the brewing plug, and then the brewing plug presses down into the brewing cup to brew coffee. After brewing, 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 bracket to swing back to the initial position.

[0004] However, in the above solution, first, only the powder cup swings during the working process, which occupies a large space; second, during the powder discharging process, the powder cake is pushed out by the push plate and moves relative to the brewing cup, making it easy to drop residues. Summary of the Utility Model

[0005] The first technical problem to be solved by the utility model is to provide a coffee machine with a compact structure in view of the current situation of the prior art.

[0006] The second technical problem to be solved by the utility model is to provide a coffee machine in which the powder cake is not easy to drop residues during operation.

[0007] The technical solutions adopted by the utility model to solve the above first and second technical problems are as follows: A coffee machine includes a machine base and a powder cup mechanism, a powder feeding mechanism, a brewing mechanism, and a liquid discharging mechanism installed on the machine base, and is characterized in that:

[0008] The powder cup mechanism includes a cylindrical powder cup and a first lifting device for driving the powder cup to lift between the powder feeding position and the brewing position, and the powder cup also has a powder discharging position below the brewing position;

[0009] The powder feeding mechanism includes a powder feeding pipe and a first translation device for driving the powder feeding pipe to translate between the powder feeding position and the yielding position;

[0010] The brewing mechanism comprises a brewing head arranged opposite to the bottom opening of the powder cup and a second lifting device for driving the brewing head to move up and down between a powder feeding position and a brewing position, and the brewing head also has a powder withdrawing position between the powder feeding position and the brewing position;

[0011] The liquid discharging mechanism comprises a liquid discharging head and a second translation device for driving the liquid discharging head to translate between a brewing position and a yielding position;

[0012] In the powder feeding state, the powder cup is in the powder feeding position, the powder feeding tube is in the powder feeding position, the brewing head is in the powder feeding position, the liquid discharge head is in the yielding position, the bottom opening of the powder cup is blocked by the brewing head, and the outlet of the powder feeding tube is opposite to the top opening of the powder cup;

[0013] In the brewing state, the powder cup is in the brewing position, the powder inlet pipe is in the yielding position, the brewing head is in the brewing position, the liquid outlet head is in the brewing position, and a brewing cavity is formed between the powder cup, the brewing head and the liquid outlet head;

[0014] In the powder-rejecting state, the powder cup is in the powder-rejecting position, the brewing head is in the powder-rejecting position, and the end surface of the top of the powder cup is not higher than the top surface of the brewing head.

[0015] In order to simplify the structure, the powder feeding position and the powder ejecting position of the powder cup are at the same position.

[0016] In order to drive the powder cup to rise and fall between the powder feeding position and the brewing position, the powder cup is mounted on the machine base so as to be able to slide up and down;

[0017] The first lifting device comprises

[0018] A first gear, rotatably connected to the base;

[0019] A first connecting rod, a first end of which is rotatably hinged on the powder cup, and a second end of which is hinged at an eccentric position of the first gear;

[0020] A second gear meshing with the first gear;

[0021] A first driving member, used for driving the second gear to rotate;

[0022] A first protrusion and a second protrusion are fixed relative to the first gear; and

[0023] A first limit switch and a second limit switch, each having a contact matched with the first protrusion and the second protrusion;

[0024] When the powder cup is in the powder feeding position, the first protrusion triggers the contact of the first limit switch;

[0025] When the powder cup is in the brewing position, the second protrusion triggers the contact of the second limit switch.

[0026] In order to achieve stable translation of the powder feeding pipe, the powder feeding mechanism further comprises a sliding seat, which can be horizontally slidably mounted on the machine base, and the powder feeding pipe is arranged on the sliding seat.

[0027] In order to drive the powder feeding pipe to translate between the powder feeding position and the clearance position, the first translation device includes

[0028] A second connecting rod, a first end of which is hinged on the sliding seat;

[0029] A third connecting rod, a first end of which is hinged to the second end of the second connecting rod, and a second end of which is hinged to the base through a pin;

[0030] A second driving member, used for driving the pin shaft to rotate;

[0031] A third protrusion fixed relative to the sliding seat; and

[0032] The third limit switch and the fourth limit switch both have contacts that match the third protrusion;

[0033] When the powder feeding pipe is in the powder feeding position, the third protrusion triggers the contact of the third limit switch;

[0034] When the powder inlet pipe is in the yield position, the third protrusion triggers the contact of the fourth limit switch.

[0035] In order to drive the brewing head to rise and fall between the powder feeding position and the brewing position, the bottom of the brewing head is provided with a screw rod coaxially arranged with the brewing head;

[0036] The second lifting device comprises

[0037] A third gear is rotatably connected to the machine base and is threadedly connected to the outer periphery of the screw rod;

[0038] a fourth gear meshing with the third gear;

[0039] A third driving member, used for driving the fourth gear to rotate;

[0040] a fourth protrusion fixed relative to the brewing head; and

[0041] The fifth limit switch and the sixth limit switch both have contacts that match the fourth protrusion;

[0042] When the brewing head is in the powder feeding position, the fourth protrusion triggers the contact of the fifth limit switch;

[0043] When the brewing head is in the powder ejection position, the fourth protrusion triggers the contact of the sixth limit switch.

[0044] In order to drive the liquid discharge head to translate between the brewing position and the yielding position and simplify the driving structure, the liquid discharge head is fixed relative to the powder inlet tube, and the second translation device and the first translation device are the same translation device;

[0045] When the powder inlet pipe is in the powder inlet position, the liquid outlet head is in the yield position;

[0046] When the powder inlet pipe is in the yielding position, the liquid outlet head is in the brewing position.

[0047] In order to realize automatic powder pushing, a powder pushing mechanism is also included, which includes a powder pushing plate and a third translation device for driving the powder pushing plate to translate between an initial position and a final position, and the powder pushing plate is opposite to the space above the brewing head in the powder withdrawing position.

[0048] In order to drive the powder pushing plate to translate between the initial position and the final position and simplify the driving structure, the powder pushing plate is fixed relative to the powder feeding pipe, and the third translation device and the first translation device are the same translation device;

[0049] When the powder feeding pipe is in the powder feeding position, the powder pushing plate is in the final position;

[0050] When the powder feeding pipe is in the yielding position, the powder pushing plate is in the initial position.

[0051] 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 powder cup is provided with a first guide seat that cooperates with the guide rod for guidance, and the brewing head is provided with a second guide seat that cooperates with the guide rod for guidance.

[0052] In order to facilitate the powder pushing plate to clean the powder cake, in the powder withdrawing state, the end surface of the top of the powder cup is flush with the top surface of the brewing head.

[0053] Compared with the prior art, the advantages of the utility model are:

[0054] (1) During the operation of the coffee machine, the powder cup, powder inlet tube, brewing head and liquid outlet head all move relative to each other to realize the functions of powder inlet, powder pressing, brewing and powder return. The structure is compact, the space occupied is small, and it is suitable for home use.

[0055] (2) During the powder return process of the coffee machine, the powder cup moves relative to the powder cake to realize the powder return function, and the powder cake is not easy to fall into the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the coffee machine of the utility model in a feeding state;

[0057] Figure 2 for Figure 1 A longitudinal cross-sectional view (viewed from front to rear);

[0058] Figure 3 for Figure 1 A longitudinal cross-sectional view in another direction (viewed from left to right);

[0059] Figure 4 for Figure 1 The schematic diagram of the three-dimensional structure behind the machine base is omitted;

[0060] Figure 5 for Figure 4 Schematic diagram of the three-dimensional structure of the middle powder cup mechanism (the powder cup is in the powder feeding position);

[0061] Figure 6 for Figure 5 Schematic diagram of the three-dimensional structure after the middle powder cup moves to the brewing position;

[0062] Figure 7 for Figure 4 Schematic diagram of the three-dimensional structure of the powder feeding mechanism, liquid discharge mechanism and powder pushing mechanism (the powder feeding pipe is in the powder feeding position);

[0063] Figure 8 for Figure 7 Schematic diagram of the three-dimensional structure after the middle powder inlet pipe moves to the yield position;

[0064] Figure 9 for Figure 4 Schematic diagram of the three-dimensional structure of the middle brewing mechanism (the brewing head is in the powder feeding position);

[0065] Figure 10 for Figure 9 A schematic diagram of the three-dimensional structure in another direction;

[0066] Figure 11 for Figure 1 A longitudinal cross-sectional view of the coffee machine after switching to the brewing state (viewed from the front to the rear);

[0067] Figure 12 for Figure 1 A longitudinal cross-sectional view (viewed from the front to the rear) of the coffee machine after it switches to the powder withdrawal state (when powder pushing begins);

[0068] Figure 13 for Figure 1 A longitudinal cross-sectional view (viewed from front to back) of the coffee machine after it switches to the powder withdrawal state (when the powder pushing is finished). DETAILED DESCRIPTION

[0069] The following further describes the present utility model in detail in conjunction with the embodiments and the drawings.

[0070] In the description and claims of the present utility model, terms indicating directions are used, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., to describe various exemplary structural parts and elements of the present utility model. However, these terms are used here only for the purpose of convenient description and are determined based on the exemplary orientations shown in the drawings. Since the embodiments disclosed by the present utility model can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity.

[0071] As Figures 1 to 13 shown, it is a preferred embodiment of the coffee machine of the present utility model. The coffee machine includes a machine base 1 and a powder cup mechanism 2, a powder feeding mechanism 3, a brewing mechanism 4, a liquid discharging mechanism 5, and a powder pushing mechanism 6 mounted on the machine base 1.

[0072] Among them, there are two guide rods 11 arranged side by side, one in front of the other, on the machine base 1, and each guide rod 11 is vertically arranged.

[0073] The powder cup mechanism 2 includes a powder cup 21 and a first lifting device 22. Specifically, the powder cup 21 is cylindrical, and a first guide seat 211 that is in guiding cooperation with the above-mentioned guide rod 11 is provided on the circumference of the powder cup 21, so that the powder cup 21 can be limited to slide up and down on the machine base 1; the first lifting device 22 is used to drive the powder cup 21 to lift between the powder feeding position and the brewing position. In addition, the powder cup 21 also has a powder discharging position below the brewing position. In this embodiment, the powder feeding position and the powder discharging position of the powder cup 21 are the same position.

[0074] In this embodiment, as Figure 5 and Figure 6As shown, the first lifting device 22 includes a first gear 221, a first connecting rod 222, a second gear 223, a first driving member 224, a first protrusion 225, a second protrusion 226, a first limit switch 227 and a second limit switch 228. Specifically, there are two first gears 221, which are symmetrically arranged on the front and rear sides of the powder cup 21, and each first gear 221 is rotatably connected to the machine base 1; there are two first connecting rods 222, which correspond to the above-mentioned first gears 221 one by one, and the first end of each first connecting rod 222 is rotatably hinged on the first guide seat 211, and the second end of each first connecting rod 222 is hinged at the eccentric position of the corresponding first gear 221; there are two second gears 223, which correspond to the above-mentioned first connecting rods 222 one by one, and the two second gears 223 are connected by a connecting shaft 2231, and are rotatably connected to the machine base 1 through the connecting shaft 2231, and each second gear 223 is connected to the first guide seat 211. The wheel 223 is meshed with the corresponding first gear 221; the first driving member 224 is a motor, which is installed on the machine base 1, and its power output end is coaxially connected to the connecting shaft 2231, which is used to drive the connecting shaft 2231 to rotate; the first protrusion 225 and the second protrusion 226 are respectively protruded at two ends of the periphery of the first gear 221 located at the front side, which are far away from each other; the first limit switch 227 is installed on the machine base 1 and is located to the left of the corresponding first gear 221, and has a contact matched with the first protrusion 225; the second limit switch 228 is installed on the machine base 1 and is located below the corresponding first gear 221, and has a contact matched with the second protrusion 226. When the powder cup 21 is in the powder feeding position and the powder withdrawing position, the first protrusion 225 triggers the contact of the first limit switch 227; when the powder cup 21 is in the brewing position, the second protrusion 226 triggers the contact of the second limit switch 228.

[0075] The powder feeding mechanism 3 includes a powder feeding member 31 and a first translation device 32. Specifically, the powder feeding member 31 includes a sliding seat 311 and a powder feeding pipe 312. The sliding seat 311 is installed on the machine base 1 so as to slide left and right. The powder feeding pipe 312 is vertically penetrated and arranged on the right part of the sliding seat 311. The first translation device 32 is used to drive the powder feeding pipe 312 to translate between the powder feeding position and the yielding position.

[0076] In this embodiment, Figure 7 and Figure 8As shown, the first translation device 32 includes a second connecting rod 321 , a third connecting rod 322 , a second driving member 323 , a third protrusion 324 , a third limit switch 325 and a fourth limit switch 326 . Specifically, there are two second connecting rods 321, which are symmetrically arranged on the front and rear sides of the sliding seat 311, and the first end of each second connecting rod 321 is hinged on the sliding seat 311; there are two third connecting rods 322, which correspond to the above-mentioned second connecting rods 321 one by one, and the first end of each third connecting rod 322 is hinged to the second end of the corresponding second connecting rod 321, and the second ends of the two third connecting rods 322 are connected by a pin shaft 3221, and are hinged to the base 1 through the pin shaft 3221; the second driving member 323 is a motor, which is installed on the base 1, and its power output end is coaxially connected to the pin shaft 3221, which is used to drive the pin shaft 3221 to rotate; the third protrusion 324 is convexly provided on the top wall of the sliding seat 311; the third limit switch 325 and the fourth limit switch 326 are arranged on the base 1 on the left and the right, and both have contacts that match the third protrusion 324. When the powder feeding pipe 312 is in the powder feeding position, the third protrusion 324 triggers the contact of the third limit switch 325 ; when the powder feeding pipe 312 is in the yielding position, the third protrusion 324 triggers the contact of the fourth limit switch 326 .

[0077] The brewing mechanism 4 includes a brewing head 41 and a second lifting device 42. Specifically, the brewing head 41 is arranged opposite to the bottom opening of the powder cup 21, and a second guide seat 411 is provided around the brewing head 41 to cooperate with the guide rod 11 so that the brewing head 41 can slide up and down and be limited on the machine base 1, and a screw rod 412 is provided at the bottom of the brewing head 41 coaxially arranged with the brewing head 41; the second lifting device 42 is used to drive the brewing head 41 to rise and fall between the powder feeding position, the powder withdrawal position and the brewing position, and the powder withdrawal position is located between the powder feeding position and the brewing position.

[0078] In this embodiment, Figure 9 and Figure 10As shown, 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 base 1 and is threadedly connected to the outer periphery of the screw rod 412; the fourth gear 422 is rotatably connected to the base 1 and meshes with the third gear 421; the third driving member 423 is a motor, which is installed on the base 1, and its power output end is coaxially connected to the fourth gear 422, which is used to drive the fourth gear 422 to rotate; the fourth protrusion 424 is convexly arranged on the side wall of the second guide base 411; the fifth limit switch 425 and the sixth limit switch 426 are arranged on the base 1 one above the other, and both have contacts that match the fourth protrusion 424. When the brewing head 41 is in the powder feeding position, the fourth protrusion 424 triggers the contact of the fifth limit switch 425 ; when the brewing head 41 is in the powder withdrawing position, the fourth protrusion 424 triggers the contact of the sixth limit switch 426 .

[0079] The liquid discharging mechanism 5 includes a liquid discharging head 51 and a second translation device 52. Specifically, the second translation device 52 is used to drive the liquid discharging head 51 to translate between the brewing position and the yielding position.

[0080] In this embodiment, Figure 7 and Figure 8 As shown, the liquid discharge head 51 is arranged on the bottom wall of the left part of the sliding seat 311; the second translation device 52 and the first translation device 32 are the same translation device, when the powder feeding tube 312 is in the powder feeding position, the liquid discharge head 51 is in the yielding position, when the powder feeding tube 312 is in the yielding position, the liquid discharge head 51 is in the brewing position.

[0081] The powder pushing mechanism 6 includes a powder pushing plate 61 and a third translation device 62. Specifically, the powder pushing plate 61 faces the space above the brewing head 41 at the powder withdrawing position; the third translation device 62 is used to drive the powder pushing plate 61 to translate between the initial position and the final position.

[0082] In this embodiment, Figure 7 and Figure 8 As shown, the powder pushing plate 61 is erected on the bottom wall in the middle of the sliding seat 311 and is located between the powder inlet pipe 312 and the liquid outlet head 51; the third translation device 62 and the first translation device 32 are the same translation device, when the powder inlet pipe 312 is in the powder inlet position, the powder pushing plate 61 is in the final position, and when the powder inlet pipe 312 is in the yield position, the powder pushing plate 61 is in the initial position.

[0083] In the powder feeding state, if Figure 2 and Figure 3As shown, the powder cup 21 is in the powder feeding position, the powder feeding tube 312 is in the powder feeding position, the brewing head 41 is in the powder feeding position, the liquid outlet head 51 is in the retracted position, the powder pushing plate 61 is in the final position, the bottom opening of the powder cup 21 is blocked by the brewing head 41, and the outlet of the powder feeding tube 312 faces the top opening of the powder cup 21. At this time, coffee powder can be fed into the powder cup 21 through the powder feeding tube 312;

[0084] In the brewing state, as Figure 11 shown, the powder cup 21 is in the brewing position, the powder feeding tube 312 is in the retracted position, the brewing head 41 is in the brewing position, the liquid outlet head 51 is in the brewing position, the powder pushing plate 61 is in the initial position, the top opening of the powder cup 21 is blocked by the liquid outlet head 51, and a brewing chamber 210 is formed by enclosing the powder cup 21, the brewing head 41, and the liquid outlet head 51. At this time, the coffee powder is tightly pressed into a powder cake by the brewing head 41, and hot water can be injected into the brewing chamber 210 through the brewing head 41 to achieve brewing;

[0085] In the powder discharging state, as Figure 12 and Figure 13 shown, the powder cup 21 is in the powder discharging position, the brewing head 41 is in the powder discharging position, and the end face at the top of the powder cup 21 is flush with the top surface of the brewing head 41. At this time, the powder pushing plate 61 can be moved from the initial position to the final position to push out the powder cake.

[0086] In addition, a powder scraping strip 12 is provided on the machine base 1. The powder scraping strip 12 has a guiding inclined surface 121 that gradually moves away from the powder cup 21 from top to bottom, so as to guide the powder cake horizontally pushed out by the powder pushing plate 61 to change the moving direction and fall vertically.

[0087] The present invention also provides a control method for the above coffee machine, including the following steps:

[0088] Step 1, powder feeding:

[0089] At the beginning, the coffee machine is in the powder feeding state. As Figure 2 and Figure 3 shown, the powder cup 21 is in the powder feeding position, the powder feeding tube 312 is in the powder feeding position, the brewing head 41 is in the powder feeding position, the liquid outlet head 51 is in the retracted position, the powder pushing plate 61 is in the final position, the bottom opening of the powder cup 21 is blocked by the brewing head 41, and the outlet of the powder feeding tube 312 faces the top opening of the powder cup 21. At this time, coffee powder can be fed into the powder cup 21 through the powder feeding tube 312;

[0090] Step 2, powder pressing and brewing:

[0091] After the powder feeding is completed, the second driving member 323 is first started to drive the pin shaft 3221 to reverse, thereby driving the sliding seat 311 to move rightward through the third connecting rod 322 and the second connecting rod 321, and then driving the powder feeding pipe 312, the liquid discharge head 51 and the powder pushing plate 61 to move rightward synchronously, until the third protrusion 324 triggers the contact of the fourth limit switch 326. At this time, the powder feeding pipe 312 is in the yield position, the liquid discharge head 51 is in the brewing position, and the powder pushing plate 61 is in the initial position;

[0092] Then, the first driving member 224 is started to drive the second gear 223 to rotate in the reverse direction, thereby driving the first gear 221 to rotate, and then driving the powder cup 21 to move upward through the first connecting rod 222. At the same time, the third driving member 423 is started to drive the fourth gear 422 to rotate in the reverse direction, 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 second protrusion 226 triggers the contact of the second limit switch 228. In this process, the powder cup 21 and the brewing head 41 move upward synchronously. At this time, the powder cup 21 is in the brewing position;

[0093] Finally, the third driving member 423 is started 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 brewing head 41 is pressed tightly against the bottom of the coffee powder (when the brewing head 41 presses the coffee powder, the tighter it is pressed, the greater the current of the corresponding motor will be, and whether the brewing head 41 has moved to the brewing position can be determined by detecting the motor current). In this process, the coffee powder is pressed into a powder cake by the brewing head 41. At this time, if Figure 11 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;

[0094] Step 3: Retire and promote fans:

[0095] After brewing is finished, the first driving member 224 is first started to drive the second gear 223 to rotate forward, thereby driving the first gear 221 to rotate, and then driving the powder cup 21 to move downward through the first connecting rod 222 until the first protrusion 225 triggers the contact of the first limit switch 227. During this process, the powder cup 21 gradually separates from the powder cake sandwiched between the brewing head 41 and the liquid discharge head 51. At this time, the powder cup 21 is in the powder ejection position;

[0096] At the same time, 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 fourth protrusion 424 triggers the contact of the sixth limit switch 426. During this process, the powder cake is synchronously lowered with the brewing head 41 and gradually separated from the liquid discharge head 51. At this time, Figure 12 As shown, the brewing head 41 is located at the powder ejection position, the coffee machine is switched to the powder ejection state, and the end surface of the top of the powder cup 21 is flush with the top surface of the brewing head 41;

[0097] Then, the second driving member 323 is started to drive the pin shaft 3221 to rotate forward, thereby driving the sliding seat 311 to move leftward through the third connecting rod 322 and the second connecting rod 321, and then driving the powder inlet pipe 312, the liquid outlet head 51 and the powder pushing plate 61 to move leftward synchronously until the third protrusion 324 triggers the contact of the third limit switch 325. During this process, the powder pushing plate 61 pushes out the powder cake placed on the brewing head 41. At this time, the powder pushing is completed. Figure 13 As shown, the powder inlet pipe 312 is in the powder inlet position, the liquid outlet head 51 is in the yield position, and the powder pushing plate 61 is in the final position;

[0098] Finally, 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 fourth protrusion 424 triggers the contact of the fifth limit switch 425. At this time, the brewing head 41 is in the powder feeding position, and the coffee machine returns to the initial state.

[0099] In the above scheme:

[0100] First, during the operation of the coffee machine, the powder cup 21, the powder inlet tube 312, the brewing head 41 and the liquid outlet head 51 all move relative to each other to realize the functions of powder inlet, powder pressing, brewing and powder withdrawal. The structure is compact, the space occupied is small, and it is suitable for home use.

[0101] Second, during the coffee machine's powder return process, the powder cup 21 moves relative to the powder cake to realize the powder return function, and the powder cake is not easy to fall off;

[0102] Third, the powder inlet pipe 312, the liquid outlet head 51 and the powder pushing plate 61 share the same driving mechanism. After the powder inlet is completed, only one action is needed to move the powder inlet pipe 312 to the yield position, and at the same time move the liquid outlet head 51 to the brewing position, and move the powder pushing plate 61 to the initial position; during the powder pushing process, only one action is needed to move the powder pushing plate 61 to the final position to realize the powder pushing function, and at the same time move the powder inlet pipe 312 to the powder inlet position, and move the liquid outlet head 51 to the yield position.

Claims

1. A coffee machine, comprising a machine base (1) and a powder cup mechanism (2), a powder feeding mechanism (3), a brewing mechanism (4) and a liquid discharging mechanism (5) mounted on the machine base (1), characterized in that: The powder cup mechanism (2) includes a cylindrical powder cup (21) and a first lifting device (22) for driving the powder cup (21) to lift between a powder feeding position and a brewing position. The powder cup (21) further has a powder discharging position below the brewing position; The powder feeding mechanism (3) includes a powder feeding pipe (312) and a first translation device (32) for driving the powder feeding pipe (312) to translate between a powder feeding position and a yielding position; The brewing mechanism (4) includes a brewing head (41) disposed opposite to the bottom opening of the powder cup (21) and a second lifting device (42) for driving the brewing head (41) to lift between a powder feeding position and a brewing position. The brewing head (41) further has a powder discharging position between the powder feeding position and the brewing position; The liquid discharging mechanism (5) includes a liquid discharging head (51) and a second translation device (52) for driving the liquid discharging head (51) to translate between a brewing position and a yielding position; In the powder feeding state, the powder cup (21) is at the powder feeding position, the powder feeding pipe (312) is at the powder feeding position, the brewing head (41) is at the powder feeding position, the liquid discharging head (51) is at the yielding position, the bottom opening of the powder cup (21) is blocked by the brewing head (41), and the outlet of the powder feeding pipe (312) is opposite to the top opening of the powder cup (21); In the brewing state, the powder cup (21) is at the brewing position, the powder feeding pipe (312) is at the yielding position, the brewing head (41) is at the brewing position, the liquid discharging head (51) is at the brewing position, and a brewing cavity (210) is formed by enclosing between the powder cup (21), the brewing head (41) and the liquid discharging head (51); In the powder discharging state, the powder cup (21) is at the powder discharging position, the brewing head (41) is at the powder discharging position, and the end face at the top of the powder cup (21) is not higher than the top surface of the brewing head (41).

2. The coffee machine according to claim 1, characterized in that: The powder feeding position and the powder discharging position of the powder cup (21) are the same position.

3. The coffee machine according to claim 2, characterized in that: The powder cup (21) is slidably mounted on the machine base (1) in the vertical direction; The first lifting device (22) includes A first gear (221) rotatably connected to the machine base (1); A first connecting rod (222) with a first end rotatably hinged to the powder cup (21) and a second end hinged to an eccentric position of the first gear (221); A second gear (223) meshing with the first gear (221); A first driving member (224) for driving the second gear (223) to rotate; A first protrusion (225) and a second protrusion (226) fixed relative to the first gear (221); And The first limit switch (227) and the second limit switch (228) respectively have contacts that cooperate with the first protrusion (225) and the second protrusion (226). When the powder cup (21) is in the powder feeding position, the first protrusion (225) triggers the contact of the first limit switch (227). When the powder cup (21) is in the brewing position, the second protrusion (226) triggers the contact of the second limit switch (228).

4. The coffee machine according to claim 1, characterized in that: The powder feeding mechanism (3) further includes a sliding seat (311) which is horizontally slidably mounted on the machine base (1), and the powder feeding pipe (312) is arranged on the sliding seat (311).

5. The coffee machine according to claim 4, wherein: The first translation device (32) includes a second connecting rod (321) whose first end is hinged to the sliding seat (311); a third connecting rod (322) whose first end is hinged to the second end of the second connecting rod (321), and the second end is hinged to the machine base (1) through a pin shaft (3221); a second driving member (323) for driving the rotation of the pin shaft (3221); a third protrusion (324) fixed relative to the sliding seat (311); and a third limit switch (325) and a fourth limit switch (326), both having contacts that cooperate with the third protrusion (324); When the powder feeding pipe (312) is in the powder feeding position, the third protrusion (324) triggers the contact of the third limit switch (325). When the powder feeding pipe (312) is in the retracted position, the third protrusion (324) triggers the contact of the fourth limit switch (326).

6. The coffee machine according to claim 1, characterized in that: The bottom of the brewing head (41) has a lead screw (412) arranged coaxially with the brewing head (41). The second lifting device (42) includes a third gear (421) rotatably connected to the machine base (1) and threadedly connected to the outer periphery of the lead screw (412); a fourth gear (422) meshing with the third gear (421); a third driving member (423) for driving the rotation of the fourth gear (422); a fourth protrusion (424) fixed relative to the brewing head (41); and a fifth limit switch (425) and a sixth limit switch (426), both having contacts that cooperate with the fourth protrusion (424); When the brewing head (41) is in the powder feeding position, the fourth protrusion (424) triggers the contact of the fifth limit switch (425). When the brewing head (41) is in the powder discharging position, the fourth protrusion (424) triggers the contact of the sixth limit switch (426).

7. The coffee machine according to claim 1, characterized in that: The liquid outlet head (51) is fixed relative to the powder feeding pipe (312), and the second translation device (52) is the same translation device as the first translation device (32). When the powder feeding pipe (312) is in the powder feeding position, the liquid outlet head (51) is in the retracted position. When the powder feeding pipe (312) is in the retracted position, the liquid outlet head (51) is in the brewing position.

8. The coffee machine according to any one of claims 1 to 7, characterized in that: The invention also comprises a powder pushing mechanism (6), the powder pushing mechanism (6) comprising a powder pushing plate (61) and a third translation device (62) for driving the powder pushing plate (61) to translate between an initial position and a final position, the powder pushing plate (61) being directly opposite to the space above the brewing head (41) in the powder withdrawing position.

9. The coffee machine according to claim 8, wherein: The powder pushing plate (61) is fixed relative to the powder feeding pipe (312), and the third translation device (62) and the first translation device (32) are the same translation device; When the powder feeding pipe (312) is in the powder feeding position, the powder pushing plate (61) is in the final position; When the powder feeding pipe (312) is in the yielding position, the powder pushing plate (61) is in the initial position.

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 top of the powder cup (21) is flush with the top surface of the brewing head (41).

Images