Milk foaming device of coffee machine

Abstract

The utility model relates to the technical field of coffee machines, in particular to a milk foaming device of a coffee machine, which comprises a milk box, a box cover, a steam nozzle, a milk outlet pipe, a milk pipe and a foaming body. The milk box is detachably connected with the box cover, the foaming body is fixedly installed in the box cover, a foaming cavity is formed in the foaming body, and the foaming cavity is provided with an air inlet, a milk inlet and a milk outlet; the air inlet is communicated with the steam nozzle, the milk inlet is communicated with the milk box through the milk pipe, and the milk outlet is communicated with the milk outlet pipe; and an air inlet is formed between the milk inlet and the milk pipe. According to the arrangement, the air inlet, the milk inlet and the milk outlet are formed in the foaming cavity, the structure is simpler, the air inlet is formed between the milk inlet and the milk pipe, air and milk can be fully fused and then enter the foaming cavity to be mixed with steam to generate milk foam, and the milk foam effect is better.

Description

Technical Field

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

[0002] With the development of the times, coffee is becoming more and more popular among the young group. By adding milk foam to coffee, the taste of coffee can be made more delicate and mellow. At present, most of the common milk foam structures on the market are fixedly arranged inside coffee machines with steam functions, so they cannot be flexibly matched with multiple coffee machine models, have a small application range, and it is inconvenient to replenish milk.

[0003] The Chinese utility model patent with the authorization announcement number CN220859901U discloses a milk frothing device for a coffee machine, which includes a housing and a foaming core. The foaming core is located inside the housing. A foaming cavity is provided inside the foaming core. An exhaust port and a milk inlet are respectively provided at the upper and lower ends of the foaming cavity. An air inlet and a milk outlet are respectively provided on both sides of the foaming cavity. The diameter of the air inlet is larger than that of the exhaust port. An air inlet part and a milk outlet part are respectively provided on both sides of the housing. The air inlet part and the milk outlet part are respectively communicated with the foaming cavity. The air inlet part includes a steam joint, and several interfaces with inner diameter sizes are provided at one end of the steam joint far away from the foaming core. Through the provision of several interfaces with inner diameter sizes at one end of the steam joint far away from the foaming core, the prior art can be connected to the steam output ends of multiple models of coffee machines, thus improving the application range of the milk frothing device. However, this prior art still has structural deficiencies. Its foaming cavity is provided with an exhaust port, a milk inlet, an air inlet and a milk outlet, with a complex structure. And the exhaust port and the milk inlet are respectively arranged at the upper and lower ends of the foaming cavity, resulting in poor milk sucking effect and unable to instantly suck milk into the foaming cavity.

[0004] Therefore, there is still room for improvement and development in the prior art. Summary of the Utility Model

[0005] Aiming at the problems of the prior art, the utility model provides a milk frothing device for a coffee machine. By providing an air inlet, a milk inlet and a milk outlet on the foaming cavity, the structure is simpler. And an air inlet is provided between the milk inlet and the milk pipe, which can make the air and milk fully blend and then enter the foaming cavity to mix with steam to generate milk foam, and the milk foam effect is better.

[0006] In order to achieve the above purpose, the technical solution applied by the utility model is as follows:

[0007] A milk frothing device for a coffee machine, comprising a milk box, a box cover, a steam nozzle, a milk outlet pipe, a milk pipe and a foaming body; the milk box is detachably connected to the box cover, the foaming body is fixedly installed in the box cover, a foaming cavity is formed in the foaming body, and the foaming cavity is provided with an air inlet, a milk inlet and a milk outlet; the air inlet is communicated with the steam nozzle, the milk inlet is communicated with the milk box through the milk pipe, and the milk outlet is communicated with the milk outlet pipe; an air inlet is provided between the milk inlet and the milk pipe.

[0008] According to the above solution, a sealing gasket is fixed at one end of the milk pipe close to the milk inlet, and the air inlet is arranged on the sealing gasket.

[0009] According to the above solution, a detachable bushing is provided at one end of the sealing gasket close to the milk inlet, and an inner hole penetrating through the bushing is provided on the bushing. Both ends of the inner hole are respectively communicated with the milk inlet and the milk pipe. The diameter of the inner hole is larger than the diameter of the air outlet of the steam nozzle and smaller than the diameter of the milk outlet. The diameter of the air outlet of the steam nozzle is larger than the diameter of the air inlet.

[0010] According to the above solution, the foaming cavity includes a negative pressure cavity and a mixing cavity. The air inlet and the milk inlet are communicated with the negative pressure cavity. The negative pressure cavity is communicated with the mixing cavity, and the mixing cavity is communicated with the milk outlet.

[0011] According to the above solution, the negative pressure cavity has a conical structure. The smaller end of the negative pressure cavity is communicated with the mixing cavity, and the larger end of the negative pressure cavity is communicated with the steam nozzle.

[0012] According to the above solution, a sealing ring I for sealingly setting with the inner wall of the air inlet is fixed on the outer wall of one end of the steam nozzle close to the air inlet.

[0013] According to the above solution, two sealing rings II and III for sealingly setting with the inner wall of the milk outlet are spaced and fixed on the outer wall of one end of the milk outlet pipe close to the milk outlet.

[0014] According to the above solution, the box cover includes an upper cover and a lower cover. The upper cover and the lower cover are detachably connected. An accommodating cavity for fixing the foaming body is formed between the upper cover and the lower cover. The lower cover is detachably connected to the opening of the milk box.

[0015] According to the above solution, a buckle is provided on the outer wall of the lower cover, and a clamping groove is provided on the inner wall of the opening of the milk box. The buckle is snap-connected with the clamping groove.

[0016] According to the above solution, the steam nozzle is detachably installed in the air inlet, and the milk outlet pipe is installed in the milk outlet at an adjustable angle.

[0017] The beneficial effects of the present utility model:

[0018] The utility model is configured in such a way that by providing an air inlet, a milk inlet, and a milk outlet on the foaming chamber, its structure is simpler. Moreover, an air inlet is provided between the milk inlet and the milk pipe, enabling the air to be fully mixed with the milk before entering the foaming chamber to be mixed with steam to generate milk foam, resulting in a better milk foam effect. Description of the Drawings

[0019] Figure 1 is the overall structure diagram of the utility model;

[0020] Figure 2 is the exploded view of the overall structure of the utility model;

[0021] Figure 3 is the cross-sectional view of the overall structure of the utility model;

[0022] Figure 4 is Figure 3 the enlarged view of position A in

[0023] In the figure:

[0024] 1. Milk box; 2. Box cover; 3. Steam nozzle; 4. Milk outlet pipe; 5. Milk pipe; 6. Foaming body; 7. First sealing ring; 8. Sealing gasket; 9. Second sealing ring; 10. Third sealing ring; 11. Upper cover; 12. Lower cover; 15. Negative pressure chamber; 16. Mixing chamber; 18. Air inlet; 19. Bushing; 22. Buckle; 23. Card slot; Detailed Implementation Manner

[0025] The technical solution of the utility model will be described below in conjunction with the drawings and embodiments.

[0026] As Figures 1 to 4 shown, the milk foam device of a coffee machine according to the utility model includes a milk box 1, a box cover 2, a steam nozzle 3, a milk outlet pipe 4, a milk pipe 5, and a foaming body 6; the milk box 1 is detachably connected to the box cover 2, the foaming body 6 is fixedly installed in the box cover 2, a foaming chamber is formed in the foaming body 6, and the foaming chamber is provided with an air inlet, a milk inlet, and a milk outlet; the air inlet is communicated with the steam nozzle 3, the milk inlet is communicated with the milk box 1 through the milk pipe 5, and the milk outlet is communicated with the milk outlet pipe 4; an air inlet 18 is provided between the milk inlet and the milk pipe 5. With such a configuration, by providing an air inlet, a milk inlet, and a milk outlet on the foaming chamber, its structure is simpler. Moreover, an air inlet 18 is provided between the milk inlet and the milk pipe 5, enabling the air to be fully mixed with the milk before entering the foaming chamber to be mixed with steam to generate milk foam, resulting in a better milk foam effect. It should be noted that when the steam nozzle 3 sprays steam to create a negative pressure in the foaming chamber, the gas in the foaming chamber will enter the milk box 1 through the milk outlet and the air inlet 18, applying a pressure to the milk in the milk box 1, and the milk can be instantaneously sucked into the foaming chamber under the negative pressure.

[0027] Working principle: Before use, first connect the steam nozzle 3 to the steam pipe of the coffee machine. The steam generated by the coffee machine enters the foaming chamber through the steam pipe and the steam nozzle 3. The gas in the foaming chamber will enter the milk box 1 through the milk outlet and the air inlet 18, applying a pressure to the milk in the milk box 1. When the foaming chamber is completely in negative pressure, the milk in the milk box 1 can be instantly sucked into the foaming chamber. During the milk sucking process, the air entering through the air inlet 18 is fully mixed with the milk and then enters the foaming chamber for foaming. Finally, the milk foam is discharged through the milk outlet pipe 4.

[0028] It should be noted that when the foaming chamber initially forms negative pressure, the air inlet 18 can be used for the exhaust function. When the negative pressure is fully formed, during the milk sucking process, the air inlet 18 can be used for the air intake function. Further, the air inlet 18 is arranged between the milk inlet and the milk pipe 5, which can make the air fully mix with the milk first and then enter the foaming chamber to mix and produce milk foam, resulting in a better milk foam effect.

[0029] In this embodiment, a sealing gasket 8 is fixed at one end of the milk pipe 5 close to the milk inlet, and the air inlet 18 is arranged on the sealing gasket 8.

[0030] In this embodiment, a detachable bushing 19 is provided at one end of the sealing gasket 8 close to the milk inlet. The bushing 19 is provided with an inner hole penetrating through the bushing 19. Both ends of the inner hole are respectively communicated with the milk inlet and the milk pipe 5. The diameter of the inner hole is larger than the outlet diameter of the steam nozzle 3 and smaller than the diameter of the milk outlet. The outlet diameter of the steam nozzle 3 is larger than the diameter of the air inlet 18. With such a setting, the negative pressure effect and the milk foam effect are better. In practical applications, the milk flow rate can be adjusted by replacing different bushings 19, thereby controlling the temperature of the milk foam generated by the milk and the steam.

[0031] In this embodiment, the foaming chamber includes a negative pressure chamber 15 and a mixing chamber 16. The air inlet and the milk inlet are communicated with the negative pressure chamber 15, the negative pressure chamber 15 is communicated with the mixing chamber 16, and the mixing chamber 16 is communicated with the milk outlet.

[0032] In this embodiment, the negative pressure chamber 15 has a conical structure. The smaller end of the negative pressure chamber 15 is communicated with the mixing chamber 16, and the larger end of the negative pressure chamber 15 is communicated with the steam nozzle 3. With such a setting, the steam pressure entering the negative pressure chamber 15 from the steam nozzle 3 can be large, and the steam pressure entering the mixing chamber 16 from the negative pressure chamber 15 can be large, resulting in a higher negative pressure effect and milk foam production efficiency.

[0033] In this embodiment, a first sealing ring 7 for sealingly setting with the inner wall of the air inlet is fixed on the outer wall of one end of the steam nozzle 3 close to the air inlet. With such a setting, gas leakage can be prevented.

[0034] In this embodiment, a second sealing ring 9 and a third sealing ring 10 for sealingly setting with the inner wall of the milk outlet are fixedly arranged at intervals on the outer wall of one end of the milk outlet pipe 4 close to the milk outlet. With such a setting, under the action of the double sealing rings, milk foam leakage can be prevented.

[0035] In this embodiment, the box cover 2 includes an upper cover 11 and a lower cover 12. The upper cover 11 and the lower cover 12 are detachably connected. A receiving cavity for fixing the foam body 6 is formed between the upper cover 11 and the lower cover 12. The lower cover 12 is detachably connected to the opening of the milk box 4. With such a setting, the loading and unloading of the foam body 6, the replacement of the bushing 19, and the replenishment of milk in the milk box 1 can be facilitated.

[0036] In this embodiment, a buckle 22 is provided on the outer wall of the lower cover 12, and a clamping groove 23 is provided on the inner wall of the opening of the milk box 1. The buckle 22 is snap-connected to the clamping groove 23. With such a setting, its loading and unloading are convenient. Preferably, the clamping groove 23 is an L-shaped groove. During assembly, after aligning the buckle 22 with the clamping groove 23, it is pushed in and then rotated by a certain angle for clamping, and the clamping effect is better.

[0037] In this embodiment, the steam nozzle 3 is detachably installed in the air inlet, and the milk outlet pipe 4 is installed in the milk outlet in an angle-adjustable manner. With such a setting, the steam nozzle 3 can be connected to the steam output ends of various models of coffee machines, improving the applicable range of the milk frothing device; the milk outlet pipe 4 can be adjusted in angle, making it more convenient to use.

[0038] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the spirit and scope protected by the claims of the present invention. These all fall within the protection scope of the present invention.

Claims

1. A milk frothing device for a coffee machine, characterized in that: It includes a milk box, a box cover, a steam nozzle, a milk outlet pipe, a milk pipe and a foaming body; The milk box is detachably connected to the box cover, the foam body is fixedly installed in the box cover, a foam cavity is formed in the foam body, and the foam cavity is provided with an air inlet, a milk inlet and a milk outlet; The air inlet is connected to the steam nozzle, the milk inlet is connected to the milk box through the milk pipe, and the milk outlet is connected to the milk outlet pipe; An air inlet is arranged between the milk inlet and the milk tube.

2. The milk frothing device of a coffee machine according to claim 1, characterized in that: A sealing pad is fixed to one end of the milk tube close to the milk inlet, and the air inlet is arranged on the sealing pad.

3. The milk frothing device of a coffee machine according to claim 2, characterized in that: A detachable bushing is provided at one end of the sealing pad close to the milk inlet, and an inner hole penetrating the bushing is provided on the bushing. Both ends of the inner hole are respectively connected to the milk inlet and the milk pipe. The diameter of the inner hole is larger than the diameter of the air outlet of the steam nozzle and smaller than the diameter of the milk outlet. The diameter of the air outlet of the steam nozzle is larger than the diameter of the air inlet.

4. The milk frothing device of a coffee machine according to claim 2, characterized in that: The foaming chamber comprises a negative pressure chamber and a mixing chamber, the air inlet and the milk inlet are connected to the negative pressure chamber, the negative pressure chamber is connected to the mixing chamber, and the mixing chamber is connected to the milk outlet.

5. The milk frothing device of a coffee machine according to claim 4, characterized in that: The negative pressure chamber is in a conical structure, the smaller end of the negative pressure chamber is connected to the mixing chamber, and the larger end of the negative pressure chamber is connected to the steam nozzle.

6. The milk frothing device of a coffee machine according to claim 1, characterized in that: A sealing ring 1 for sealing with the inner wall of the air inlet is fixed on the outer wall of the steam nozzle close to the air inlet.

7. The milk frothing device of a coffee machine according to claim 1, characterized in that: A second sealing ring and a third sealing ring for sealing with the inner wall of the milk outlet are fixed at intervals on the outer wall of the milk outlet pipe at one end close to the milk outlet.

8. The milk frothing device of a coffee machine according to claim 1, characterized in that: The box cover comprises an upper cover and a lower cover, the upper cover and the lower cover are detachably connected, a containing cavity for fixing the foaming body is formed between the upper cover and the lower cover, and the lower cover is detachably connected to the opening of the milk box.

9. The milk frothing device of a coffee machine according to claim 8, characterized in that: A buckle is arranged on the outer wall of the lower cover, a slot is arranged on the inner wall of the opening of the milk box, and the buckle is connected with the slot in a locking position.

10. The milk frothing device of a coffee machine according to claim 1, characterized in that: The steam nozzle is detachably mounted in the air inlet, and the milk outlet pipe is installed in the milk outlet at an adjustable angle.

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