Milk foam coffee machine

Abstract

The utility model relates to the technical field of coffee machines, in particular to a milk frothing coffee machine which comprises a main machine, and a coffee brewing device, a milk frothing device, a water supply device, a heating boiler, a three-way valve, a steam valve and a milk box steam device are arranged on the main machine. The water supply device is connected with the heating boiler through a first pipeline, the heating boiler is connected with the three-way valve through a second pipeline, the three-way valve is respectively connected with the coffee brewing device and the steam valve through a third pipeline and a fourth pipeline, the steam valve is connected with the milk box steam device through a fifth pipeline, and the milk box steam device and the milk foaming device are correspondingly arranged. The waterway structure of the single heating boiler is adopted, the number of elements of the whole waterway is reduced, the cost is reduced, and the operation stability of the waterway is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee machines, in particular to a milk foam coffee machine. Background Art

[0002] A coffee machine is a device that allows people to easily make coffee. With the development of society, coffee machines are becoming increasingly popular. One type of coffee machine is a milk frother. Currently, most milk frothers on the market have a variety of water systems. Their purpose is to provide hot water for brewing coffee and steam for frothing milk. Most of these water systems use the following two methods:

[0003] One method is to use a dual boiler for hot water and steam, that is, a boiler for supplying hot water and a boiler for supplying steam coexist. For example, the utility model patent with publication number CN116268952A discloses a coffee making system. This prior art uses dual boilers for heating. Its water system operates stably and the coffee produced is of stable quality. However, its structure is very complex, with many control components, and its cost is high.

[0004] Another method is to use a single boiler, which can be used to supply both hot water and steam. For example, the utility model patent with announcement number CN219742471U discloses a water system for a milk coffee machine. This existing technology uses a single boiler for heating, and its water system cost is low, but the water system operation is unstable.

[0005] Therefore, the existing technology still needs to be improved and developed. Utility Model Content

[0006] In order to solve the problems of the prior art, the utility model proposes a milk coffee machine, which can not only improve the stability of water channel operation but also reduce production costs.

[0007] In order to achieve the above-mentioned purpose, the technical solution applied by the present utility model is as follows:

[0008] A milk frothing coffee machine comprises a main unit, the main unit being provided with a coffee brewing device, a milk frothing device, a water supply device, a heating boiler, a three-way valve, a steam valve, and a milk tank steam device; the water supply device being connected to the heating boiler via a first pipeline, the heating boiler being connected to the three-way valve via a second pipeline, the three-way valve being connected to the coffee brewing device and the steam valve via a third pipeline and a fourth pipeline, respectively, the steam valve being connected to the milk tank steam device via a fifth pipeline, and the milk tank steam device and the milk frothing device being arranged correspondingly.

[0009] According to the above scheme, a cavity is formed in the steam valve, and a water inlet, a water outlet and a pressure relief port connected to the cavity are provided on the steam valve. The water inlet is connected to the three-way valve through pipeline four, the water outlet is connected to the milk box steam device through pipeline five, and the pressure relief port is connected to pipeline six for pressure relief. The outlet of pipeline six is ​​connected to the water collection tank of the main machine. The water outlet and the pressure relief port are driven to open or close by a driving device.

[0010] According to the above scheme, the driving device includes a motor and a transmission shaft, the first end of the transmission shaft is connected to the output end of the motor, and the second end of the transmission shaft is arranged corresponding to the steam valve. When the motor drives the transmission shaft to rotate forward, the water outlet opens; when the motor drives the transmission shaft to rotate reversely, the pressure relief port opens.

[0011] According to the above scheme, the steam valve is provided with a first valve needle and a second valve needle, the first valve needle is used to open or close the water outlet, and the second valve needle is used to open or close the pressure relief port; the transmission shaft is provided with a first drive block and a second drive block, when the motor drives the transmission shaft to rotate forward, the first drive block pushes the first valve needle to move, and the water outlet opens; when the motor drives the transmission shaft to rotate reversely, the second drive block pushes the second valve needle to move, and the pressure relief port opens.

[0012] According to the above solution, the first valve needle and the second valve needle are respectively provided with a first return spring and a second return spring.

[0013] According to the above scheme, the first valve needle and the second valve needle are arranged horizontally at intervals on the steam valve; the first drive block and the second drive block are staggered on the outer wall of the transmission shaft. When the first drive block pushes the first valve needle to operate, the second drive block is staggered with the second valve needle; when the second drive block pushes the second valve needle to operate, the first drive block is staggered with the first valve needle.

[0014] According to the above scheme, a stop block is provided on the steam valve, and a first limit block and a second limit block are provided on the drive shaft; when the motor drives the drive shaft to rotate forward until the first limit block abuts against the stop block, the first drive block pushes the first valve needle to move, and when the motor drives the drive shaft to rotate reversely until the second limit block abuts against the stop block, the second drive block drives the second valve needle to move.

[0015] According to the above solution, a limiting guide groove is provided on the steam valve, and a limiting guide block is provided on the transmission shaft, and the limiting guide block is arranged in coordination with the limiting guide groove.

[0016] According to the above solution, the water supply device includes a water tank and a water pump. The water tank can be detachably installed on the main unit, and the water inlet and outlet of the water pump are respectively connected to the water tank and pipeline one.

[0017] According to the above solution, a flow meter safety valve is provided on the pipeline 1.

[0018] Beneficial effects of the utility model:

[0019] The present invention is configured such that, during operation, cold water is supplied to the heating boiler via the water supply device through pipeline 1, and the heating boiler heats the cold water into hot water; when brewing coffee, the hot water is delivered to the coffee brewing device via pipeline 2, the three-way valve 8, and pipeline 3, thereby providing hot water for brewing coffee; when frothing milk, the hot water is delivered to the milk tank steam device via pipeline 2, the three-way valve, pipeline 4, the steam valve, and pipeline 5, thereby generating steam, which enters the milk frothing device, thereby providing steam for frothing milk; the present invention adopts a water circuit structure of a single heating boiler, which not only reduces the number of components in the entire water circuit, reduces costs, but also improves the operational stability of the water circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the entire machine of the utility model;

[0022] Figure 3 This is a schematic diagram of the assembly of the steam valve and drive device of the utility model;

[0023] Figure 4 This is an exploded view of the steam valve and drive device of the utility model;

[0024] Figure 5 It is a schematic block diagram of the waterway of the utility model.

[0025] In the picture:

[0026] 1. Main unit; 2. Coffee brewing device; 3. Milk frothing device; 4. Water tank; 5. Water pump; 6. Flow meter safety valve; 7. Heating boiler; 8. Three-way valve; 9. Steam valve; 10. Drive unit; 11. Milk tank steam device; 12. Water collecting tank; 21. Motor; 22. Drive shaft; 31. First drive block; 32. Second drive block; 33. Limit guide block; 41. First limit block; 42. Second limit block; 51. First valve needle; 52. Second valve needle; 53. Stop block; 61. Pipeline 1; 62. Pipeline 2; 63. Pipeline 3; 64. Pipeline 4; 65. Pipeline 5; 66. Pipeline 6; 71. Water inlet; 72. Water outlet; 73. Pressure relief port; 81. Limit guide groove. DETAILED DESCRIPTION

[0027] The technical solution of the present utility model is described below with reference to the accompanying drawings and embodiments.

[0028] like Figures 1 to 5As shown, the milk coffee machine described in the present invention includes a main unit 1, on which a coffee brewing device 2, a milk frothing device 3, a water supply device, a heating boiler 7, a three-way valve 8, a steam valve 9 and a milk tank steam device 11 are provided; the water supply device is connected to the heating boiler 7 through a pipeline 1 61, the heating boiler 7 is connected to the three-way valve 8 through a pipeline 2 62, the three-way valve 8 is connected to the coffee brewing device 2 and the steam valve 9 through a pipeline 3 63 and a pipeline 4 64 respectively, the steam valve 9 is connected to the milk tank steam device 11 through a pipeline 5 65, and the milk tank steam device 11 is arranged corresponding to the milk frothing device 3. With this arrangement, during operation, cold water is supplied to the heating boiler 7 via the water supply device through the first pipe 61, and the heating boiler 7 heats the cold water into hot water. When brewing coffee, the hot water is delivered to the coffee brewing device 2 via the second pipe 62, the three-way valve 8, and the third pipe 63, thereby providing hot water for brewing coffee. When frothing milk, the hot water is delivered to the milk tank steam device 11 via the second pipe 62, the three-way valve 8, the fourth pipe 64, the steam valve 9, and the fifth pipe 65, thereby generating steam. The steam then enters the milk frothing device 3, thereby providing steam for frothing milk. The present invention adopts a water circuit structure with a single heating boiler 7, which not only reduces the number of components in the entire water circuit, lowering costs, but also improves the operational stability of the water circuit.

[0029] Specifically, the steam valve 9 has a cavity formed therein. The steam valve 9 is provided with a water inlet 71, a water outlet 72, and a pressure relief port 73, all of which are connected to the cavity. The water inlet 71 is connected to the three-way valve 8 via a fourth pipe 64. The water outlet 72 is connected to the milk tank steam device 11 via a fifth pipe 65. The pressure relief port 73 is connected to a sixth pipe 66 for pressure relief. The outlet of the sixth pipe 66 is connected to the water collection tank 12 of the main unit 1. The water outlet 72 and the pressure relief port 73 are opened or closed by a driving device. With this arrangement, when frothing milk, hot water is fed into the steam valve 9 via the second pipe 62, the three-way valve 8, and the fourth pipe 64. When the driving device drives the water outlet 72 to open, the hot water is fed to the milk tank steam device 11 via the fifth pipe 65 to generate steam, thereby supplying steam to the milk frothing device 3. After frothing the milk, the driving device drives the pressure relief port 73 to open, releasing the water pressure into the water collection tank 12 of the main unit 1. This prevents environmental pollution and facilitates subsequent cleaning.

[0030] Specifically, the drive device includes a motor 21 and a transmission shaft 22. The first end of the transmission shaft 22 is connected to the output terminal of the motor 21, and the second end of the transmission shaft 22 is positioned corresponding to the steam valve 9. When the motor 21 drives the transmission shaft 22 in the forward direction, the water outlet 72 opens; when the motor 21 drives the transmission shaft 22 in the reverse direction, the pressure relief vent 73 opens. This arrangement allows the water outlet 72 or the pressure relief vent 73 to open by driving the transmission shaft 22 in the forward and reverse directions, providing ease of use.

[0031] Furthermore, the steam valve 9 is provided with a first valve needle 51 and a second valve needle 52, the first valve needle 51 is used to open or close the water outlet 72, and the second valve needle 52 is used to open or close the pressure relief port 73; the transmission shaft 22 is provided with a first drive block 31 and a second drive block 32, when the motor 21 drives the transmission shaft 22 to rotate forward, the first drive block 31 pushes the first valve needle 51 to move, and the water outlet 72 opens; when the motor 21 drives the transmission shaft 22 to rotate reversely, the second drive block 32 pushes the second valve needle 52 to move, and the pressure relief port 73 opens.

[0032] In practical applications, the first driving block 31 and the second driving block 32 are protruded from the outer wall of the transmission shaft 22 .

[0033] Furthermore, the first valve needle 51 and the second valve needle 52 are respectively provided with a first return spring and a second return spring. In this configuration, in the initial state, under the action of the first return spring and the second return spring, the first valve needle 51 and the second valve needle 52 are in a state of closing the water outlet 72 and the pressure relief port 73. When the motor 21 drives the transmission shaft 22 to drive the first drive block 31 to push the first valve needle 51, the first return spring is compressed and the water outlet 72 is opened. When the motor 21 drives the transmission shaft 22 to drive the first drive block 31 to disengage from the first valve needle 51, the first valve needle 51 is reset under the rebound force of the first return spring, and the first valve needle 51 recloses the water outlet 72. Similarly, when the motor 21 drives the transmission shaft 22 to drive the second drive block 32 to push the second valve needle 52, the second return spring is compressed and the pressure relief port 73 is opened. When the motor 21 drives the transmission shaft 22 to drive the second drive block 32 to disengage from the second valve needle 52, the second return spring is reset under the rebound force of the second return spring, and the second valve needle 52 recloses the pressure relief port 73.

[0034] Furthermore, the first valve needle 51 and the second valve needle 52 are horizontally spaced apart and arranged on the steam valve 9; the first drive block 31 and the second drive block 32 are staggered on the outer wall of the transmission shaft 22. When the first drive block 31 pushes the first valve needle 51 to operate, the second drive block 32 is staggered with the second valve needle 52; when the second drive block 32 pushes the second valve needle 52 to operate, the first drive block 31 is staggered with the first valve needle 51. This arrangement ensures that the first valve needle 51 and the second valve needle 52 do not interfere with each other during operation. When the first drive block 31 pushes the first valve needle 51 to operate, the water outlet 72 opens and the pressure relief port 73 is closed; when the second drive block 32 pushes the second valve needle 52 to operate, the pressure relief port 73 opens and the water outlet 72 is closed. More specifically, the water outlet 72 and the pressure relief port 73 will not open simultaneously, but only one of them can open separately. That is, when the water outlet 72 opens, the pressure relief port 73 closes, and when the pressure relief port 73 opens, the water outlet 72 closes.

[0035] Furthermore, a stop block 53 is provided on the steam valve 9, and a first limit block 41 and a second limit block 42 are provided on the drive shaft 22; when the motor 21 drives the drive shaft 22 to rotate forward until the first limit block 41 abuts against the stop block 53, the first drive block 31 pushes the first valve needle 51 to move; when the motor 21 drives the drive shaft 22 to rotate reversely until the second limit block 42 abuts against the stop block 53, the second drive block 32 pushes the second valve needle 52 to move. In this way, the first limit block 41 and the second limit block 42 can be used to limit the stroke of the drive shaft 22 during forward and reverse rotation, that is, when the motor 21 drives the drive shaft 22 to rotate forward until the first limit block 41 abuts against the stop block 53, the drive shaft 22 is at the maximum stroke of forward rotation and can no longer rotate forward. At this time, the first drive block 31 pushes the first valve needle 51 to move; when the motor 21 drives the drive shaft 22 to rotate reversely and the second limit block 42 abuts against the stop block 53, the drive shaft 22 is at the maximum stroke of reverse rotation and can no longer rotate reversely. At this time, the second drive block 32 pushes the second valve needle 52 to move.

[0036] In actual applications, the first limiting block 41 and the second limiting block 42 are an integrated structure, protruding from the outer wall of the transmission shaft 22 , and staggered between the first driving block 31 and the second driving block 32 .

[0037] Furthermore, the steam valve 9 is provided with a limiting guide groove 81, and the transmission shaft 22 is provided with a limiting guide block 33, which cooperates with the limiting guide groove 81. This arrangement allows the transmission shaft 22 to rotate only relative to the steam valve 9, but not to move left or right relative to the steam valve 9, thereby preventing the transmission shaft 22 and the steam valve 9 from changing positions. More specifically, this arrangement ensures that the first drive block 31 and the first valve needle 51 are always in corresponding positions, the second drive block 32 and the second valve needle 52 are always in corresponding positions, and the first limiting block 41 and the second limiting block 42 and the stop block 53 are always in corresponding positions.

[0038] Of course, the positions of the limiting guide groove 81 and the limiting guide block 33 can be interchanged, that is, the limiting guide groove 81 is provided on the transmission shaft 22, and the limiting guide block 33 is provided on the steam valve 9, which can achieve the same effect.

[0039] Specifically, the water supply device includes a water tank 4 and a water pump 5. The water tank 4 is detachably mounted on the main unit 1. The water inlet and outlet of the water pump 5 are connected to the water tank 4 and to pipe 1 61, respectively. This arrangement allows the water pump 5 to supply cold water from the water tank 4 to the heating boiler 7, while also providing power for the entire water circuit. The present invention utilizes a single water pump 5 for the water circuit, which not only reduces the number of components in the entire water circuit, lowering costs, but also ensuring operational stability.

[0040] Furthermore, a flow meter safety valve 6 is provided on the pipeline 1 61. This arrangement can provide an appropriate amount of water to the heating boiler 7 according to actual needs.

[0041] Furthermore, the host 1 is provided with a controller for controlling the operation of each device through a control program, such as controlling the water pump 5, the heating boiler 7, the motor 21, etc.

[0042] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the scope of protection of the present invention.

Claims

1. A milk coffee machine, comprising a main unit (1), characterized in that: The main machine (1) is provided with a coffee brewing device (2), a milk frothing device (3), a water supply device, a heating boiler (7), a three-way valve (8), a steam valve (9) and a milk tank steam device (11); The water supply device is connected to the heating boiler (7) through a first pipeline (61), the heating boiler (7) is connected to a three-way valve (8) through a second pipeline (62), the three-way valve (8) is connected to the coffee brewing device (2) and the steam valve (9) through a third pipeline (63) and a fourth pipeline (64), respectively, the steam valve (9) is connected to the milk tank steam device (11) through a fifth pipeline (65), and the milk tank steam device (11) and the milk frothing device (3) are correspondingly arranged.

2. The milk coffee machine according to claim 1, characterized in that: A cavity is formed in the steam valve (9), and a water inlet (71), a water outlet (72) and a pressure relief port (73) are provided on the steam valve (9) which are connected to the cavity. The water inlet (71) is connected to the three-way valve (8) through a fourth pipe (64), the water outlet (72) is connected to the milk box steam device (11) through a fifth pipe (65), and the pressure relief port (73) is connected to a sixth pipe (66) for pressure relief, and the outlet of the sixth pipe (66) is connected to the water collecting tank (12) of the main machine (1). The water outlet (72) and the pressure relief port (73) are driven to open or close by a driving device.

3. The milk coffee machine according to claim 2, characterized in that: The driving device comprises a motor (21) and a transmission shaft (22), wherein a first end of the transmission shaft (22) is connected to an output end of the motor (21), and a second end of the transmission shaft (22) is arranged corresponding to a steam valve (9). When the motor (21) drives the transmission shaft (22) to rotate in a forward direction, the water outlet (72) opens; when the motor (21) drives the transmission shaft (22) to rotate in a reverse direction, the pressure relief port (73) opens.

4. The milk coffee machine according to claim 3, characterized in that: The steam valve (9) is provided with a first valve needle (51) and a second valve needle (52), the first valve needle (51) is used to open or close the water outlet (72), and the second valve needle (52) is used to open or close the pressure relief port (73); the transmission shaft (22) is provided with a first driving block (31) and a second driving block (32), when the motor (21) drives the transmission shaft (22) to rotate in the forward direction, the first driving block (31) pushes the first valve needle (51) to move, and the water outlet (72) is opened; when the motor (21) drives the transmission shaft (22) to rotate in the reverse direction, the second driving block (32) pushes the second valve needle (52) to move, and the pressure relief port (73) is opened.

5. The milk coffee machine according to claim 4, characterized in that: The first valve needle (51) and the second valve needle (52) are respectively provided with a first return spring and a second return spring.

6. The milk coffee machine according to claim 4, characterized in that: The first valve needle (51) and the second valve needle (52) are arranged horizontally and spaced apart on the steam valve (9); the first drive block (31) and the second drive block (32) are arranged staggered on the outer wall of the transmission shaft (22); when the first drive block (31) pushes the first valve needle (51) to move, the second drive block (32) and the second valve needle (52) are staggered; when the second drive block (32) pushes the second valve needle (52) to move, the first drive block (31) and the first valve needle (51) are staggered.

7. The milk coffee machine according to claim 4, characterized in that: The steam valve (9) is provided with a stop block (53), and the transmission shaft (22) is provided with a first limit block (41) and a second limit block (42); when the motor (21) drives the transmission shaft (22) to rotate in the forward direction until the first limit block (41) abuts against the stop block (53), the first drive block (31) pushes the first valve needle (51) to operate; when the motor (21) drives the transmission shaft (22) to rotate in the reverse direction until the second limit block (42) abuts against the stop block (53), the second drive block (32) pushes the second valve needle (52) to operate.

8. The milk coffee machine according to claim 4, characterized in that: The steam valve (9) is provided with a limiting guide groove (81), the transmission shaft (22) is provided with a limiting guide block (33), and the limiting guide block (33) is matched with the limiting guide groove (81).

9. The milk coffee machine according to claim 1, characterized in that: The water supply device comprises a water tank (4) and a water pump (5). The water tank (4) is detachably mounted on the main unit (1). The water inlet and outlet of the water pump (5) are respectively connected to the water tank (4) and a pipe (61).

10. The milk coffee machine according to claim 1, characterized in that: The pipeline 1 (61) is provided with a flow meter safety valve (6).

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