Silent foaming device

Abstract

The utility model relates to a silent foaming device which comprises a rod body provided with a spray hole. The spraying holes are connected with a steam source; the first supporting part is connected with the rod body; around the axis of the rod body, the outer contour of the first supporting part exceeds the outer contour of the rod body; the barrel body is arranged on the rod body in a sleeving manner; the first supporting part is in contact with the inner wall of the barrel and supports the barrel; a cavity is formed between the barrel body and the rod body; a through hole is formed in the barrel and communicated with the cavity; the second supporting part is arranged in the cavity; wherein the first supporting part is connected with the cylinder body in a sealing manner; and the orifice of the spraying hole is formed in one side, far away from the first supporting part, of the second supporting part. Through the cooperation of the first supporting part and the second supporting part, the position relation between the rod body and the barrel body is fixed in a multi-point mode, the stability of the rod body is improved, noise generated by mechanical vibration of the rod body is reduced, and the use experience of a user is optimized.

Description

Technical Field

[0001] This utility model relates to the field of coffee machine technology, and in particular to a silent bubbling device. Background Technology

[0002] The coffee machine is equipped with a steam system, which includes a steam generator and a steam wand for spraying steam. Generally, the steam generator is located inside the coffee machine, and the steam wand is connected to the steam generator and suspended above the support surface on the outside of the coffee machine to spray steam into the milk cup placed on the support surface.

[0003] The steam wand, suspended on the outside of the coffee machine, receives relatively little support, resulting in lower structural stability. As the high-pressure steam travels along the wand, it impacts the wand, causing it to vibrate and generate noise. Additionally, the high-pressure steam ejecting from the small-diameter nozzles on the wand and impacting the milk also produces a whistling sound. This noise generated by the steam wand significantly impacts the user experience.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a silent foaming device to reduce the noise during milk foam making.

[0006] The technical solution of this utility model is as follows:

[0007] The silent bubbling device includes:

[0008] The rod body has nozzles; the nozzles are connected to a steam source.

[0009] A first support portion is connected to the rod body; the outer contour of the first support portion extends beyond the outer contour of the rod body around the axis of the rod body.

[0010] A cylindrical body is fitted onto the rod body; the first support portion contacts the inner wall of the cylindrical body and supports the cylindrical body; a cavity is provided between the cylindrical body and the rod body; a through hole is provided on the cylindrical body to communicate with the cavity;

[0011] A second support portion is disposed within the cavity;

[0012] The first support portion is sealed to the cylinder body; the nozzle opening is located on the side of the second support portion away from the first support portion.

[0013] A further technical solution is that a filter screen is provided at the end of the cylinder away from the first support part; the filter screen is arranged perpendicular to the axial direction of the cylinder.

[0014] A further technical solution is that an annular groove is formed on the inner wall of the end of the cylinder away from the first support; the filter screen is disposed in the annular groove; a limiting ring is also disposed in the annular groove; and the filter screen is disposed between the cylinder and the limiting ring.

[0015] A further technical solution is that the second support part is fixedly connected to the cylinder; the second support part is annularly sleeved on the rod; the second support part divides the cavity into a first cavity and a second cavity; a connecting hole is opened on the second support part to connect the first cavity and the second cavity.

[0016] A further technical solution is that at least two connecting holes are provided; all the connecting holes are evenly arranged around the axis of the rod.

[0017] A further technical solution is that a first annular groove is formed on the first support part around the axis of the rod body; a first washer is sleeved on the first support part along the first annular groove; and the first washer fills the gap between the first support part and the cylinder body.

[0018] A further technical solution is that a second annular groove is formed on the rod body around its axis; a second washer is fitted onto the rod body along the second annular groove; and the second washer fills the gap between the second support and the rod body.

[0019] A further technical solution is that the second support part has a concave arc transition with the cylinder on the side close to the first support part.

[0020] A further technical solution is that the end surface of the rod near the nozzle has a rounded chamfer with the side surface of the rod.

[0021] A further technical solution is that a strip groove is formed on the inner wall of the cylinder around the axis of the rod; a limiting groove is formed on the inner wall of the cylinder along the axis of the rod; the limiting groove connects the strip groove and the end of the cylinder; a limiting protrusion extends from the first support portion and extends into the strip groove.

[0022] The beneficial technical effects of this utility model are as follows:

[0023] (1) The silent foaming device of this utility model has a nozzle on the rod body for connecting to a steam source. Inserting the rod body into the milk will heat the milk or generate milk foam. A cylinder is fitted onto the rod body, and a first support and a second support are provided between the cylinder and the rod body. The first and second support parts rigidly support the rod body, reducing resonance between the rod body and the steam source. Furthermore, the first and second support parts work together to fix the positional relationship between the rod body and the cylinder at multiple points, further improving the stability of the rod body and reducing noise generated by mechanical vibration. In addition, the cylinder fitted onto the rod body itself blocks the rod body from transmitting noise to the outside, optimizing the user experience.

[0024] (2) Furthermore, a filter screen is also installed inside the cylinder. The filter screen has small pores, and this small pore structure reflects part of the sound wave echo source, preventing the noise generated by the rod from passing outside the cylinder. In addition, the pores of the filter screen are similar to an acoustic impedance interface, and the sound wave interference is canceled out through the impedance difference of different pore sizes. In particular, the attenuation effect is significant for the mid-to-high frequency sharp sound generated during steam injection.

[0025] (3) Furthermore, the second support is annular and sleeved on the rod body. The annular second support provides uniform support to the rod body in the circumferential direction, further improving the stability of the rod body and reducing the mechanical vibration of the rod body and the noise generated by the vibration. Attached Figure Description

[0026] Figure 1 A three-dimensional structural schematic diagram of a silent bubbling device according to an embodiment of the present disclosure is shown.

[0027] Figure 2 A vertical cross-sectional schematic diagram of a silent bubbling device according to an embodiment of the present disclosure is shown.

[0028] Figure 3 A cross-sectional view at point A is shown of a silent bubbling device according to an embodiment of the present disclosure.

[0029] Figure 4 A three-dimensional structural schematic diagram of the sleeve and collar in a silent bubbling device according to an embodiment of the present disclosure is shown.

[0030] Marked in the attached diagram:

[0031] 1. Rod body; 11. Spray hole; 12. Second annular groove; 13. Second washer; 2. First support part; 21. First washer; 22. Limiting protrusion; 23. First annular groove; 3. Second support part; 31. Connecting hole; 4. Cylinder body; 41. First cavity; 42. Second cavity; 43. Through hole; 44. Limiting groove; 45. Strip groove; 46. Annular groove; 5. Sleeve; 51. Groove; 6. Collar; 61. Inner extension part; 7. Filter screen; 71. Filter hole; 72. Limiting ring. Detailed Implementation

[0032] To make the objectives, features, and advantages of this utility model more apparent and understandable, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0033] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Figure 1 A three-dimensional structural schematic diagram of a silent bubbling device according to an embodiment of the present disclosure is shown. Figure 2 A vertical cross-sectional view of a silent bubbling device according to an embodiment of this disclosure is shown. Please refer to... Figure 1 and Figure 2 The silent foaming device includes a rod 1 with a nozzle 11 connected to a steam source. Inserting the rod 1 into milk heats the milk or generates foam. A first support 2 connects to the rod 1. The outer contour of the first support 2 extends beyond the outer contour of the rod 1 around its axis. A cylinder 4 is fitted onto the rod 1. The cylinder 4 prevents noise transmission from the rod 1, optimizing the user experience. The first support 2 contacts and supports the inner wall of the cylinder 4. A cavity exists between the cylinder 4 and the rod 1. A through hole 43 connects the cylinder 4 to the cavity. A second support 3 is disposed within the cavity. The first support 2 and the cylinder 4 are sealed together. The nozzle 11 is located on the side of the second support 3 away from the first support 2. The first and second support 3 rigidly support the rod 1, reducing resonance between the rod 1 and the steam source. The first support part 2 and the second support part 3 work together to fix the positional relationship between the rod body 1 and the cylinder body 4 at multiple points, further improving the stability of the rod body 1 and reducing the noise generated by the mechanical vibration of the rod body 1.

[0035] Please refer to Figure 1 and Figure 2A filter screen 7 is installed at the end of the cylinder 4 furthest from the first support part 2. The filter screen 7 is arranged perpendicular to the axial direction of the cylinder 4. The pores 71 on the filter screen 7 are small, and this small pore structure reflects part of the sound wave echo source, preventing the noise generated by the rod 1 from passing out of the cylinder 4. In addition, the combination of multiple filter holes 71 forms a kind of acoustic impedance interface. The impedance difference of filter holes 71 with different pore sizes achieves sound wave interference cancellation, especially for the mid-to-high frequency sharp sound generated during steam injection, with a significant attenuation effect. The filter screen 7 works in conjunction with the cylinder 4 to ensure the quiet performance of the silent bubbling device.

[0036] Preferably, an annular groove 46 is formed on the inner wall of the end of the cylinder 4 away from the first support 2. The filter screen 7 is disposed in the annular groove 46. A limiting ring 72 is also provided in the annular groove 46, and the limiting ring 72 is interference-fitted with the cylinder 4. The filter screen 7 is disposed between the cylinder 4 and the limiting ring 72. It is fixed in position by the circumferential compression of the limiting ring 72.

[0037] Figure 3 A cross-sectional view at point A is shown of a silent bubbling device according to an embodiment of this disclosure. Please refer to... Figure 2 and Figure 3 The second support part 3 is fixedly connected to the cylinder 4. The second support part 3 and the cylinder 4 can be welded together or integrally formed. The second support part 3 is annularly sleeved on the rod 1, and the annular second support part 3 provides uniform circumferential support to the rod 1, further improving the stability of the rod 1 and reducing mechanical vibration and noise generated by vibration. The second support part 3 divides the cavity into a first cavity 41 and a second cavity 42. A connecting hole 31 is provided on the second support part 3 to connect the first cavity 41 and the second cavity 42. When the rod 1 is inserted under the milk, air outside the cylinder 4 can flow into the second cavity 42 through the through hole 43, the first cavity 41 and the connecting hole 31, ensuring that air can be entrained when the steam impacts the milk, and milk foam is generated normally. In some other embodiments, the second support part 3 can be fixed to the rod 1.

[0038] Preferably, at least two connecting holes 31 are provided. All connecting holes 31 are evenly arranged around the axis of the rod body 1, allowing air in the first cavity 41 to flow evenly into the second cavity 42. This prevents air from being drawn into the milk from a single direction when steam impacts the milk, which would affect the formation of milk foam.

[0039] More preferably, the side of the second support 3 closest to the first support 2 has a concave arc transition with the cylinder 4. When the cylinder 4 is fitted onto the rod 1, the concave arc guides the rod 1 through the second support 3, facilitating the assembly of the cylinder 4 and the rod 1.

[0040] In other embodiments, the first support portion 2 and the second support portion 3 can be a single integral component. That is, along the axial direction of the rod body 1, the first support portion 2 and the second support portion 3 extend and connect, with the connecting hole 31 communicating with the outer surface of the second support portion 3 to directly connect with the through hole 43. The first support portion 2 and the second support portion 3 as a single unit reduces the number of components in the silent bubbling device.

[0041] Please refer to Figure 2 and Figure 3 A first annular groove 23 is formed on the first support part 2 around the axis of the rod body 1. A first washer 21 is fitted onto the first support part 2 along the first annular groove 23. The first washer 21 is made of elastic material, and its elastic deformation fills the gap between the first support part 2 and the cylinder 4 to seal the connection between the first support part 2 and the cylinder 4. A second annular groove 12 is formed on the rod body 1 around the axis of the rod body 1. A second washer 13 is fitted onto the rod body 1 along the second annular groove 12. The second washer 13 is made of elastic material, and its elastic deformation fills the gap between the second support part 3 and the rod body 1 to seal the connection between the first support part 2 and the cylinder 4. When the rod body 1 is inserted into the milk, the air entrained in the milk by the steam can only enter the cylinder 4 through the through hole 43. At this time, if it is necessary to switch the rod body 1 to only heat the milk without producing milk foam, it is only necessary to block the through hole 43, simplifying the operation of the silent foaming device.

[0042] Preferably, the end surface of the rod 1 near the nozzle 11 has a rounded chamfer between it and the side surface of the rod 1. When the cylinder 4 is fitted onto the rod 1, the rod 1 needs to pass through the second support 3. At this time, the rounded chamfer guides the movement direction of the second support 3, making it easier for the rod 1 to pass through the second support 3 and facilitating the assembly between the cylinder 4 and the rod 1.

[0043] Figure 4 A three-dimensional structural schematic diagram of the sleeve and collar in a silent bubbling device according to an embodiment of this disclosure is shown. Please refer to... Figure 2 and Figure 4 A strip groove 45 is formed on the inner wall of the cylinder 4 around the axis of the rod 1. A limiting groove 44 is formed on the inner wall of the cylinder 4 along the axis of the rod 1. The limiting groove 44 connects the strip groove 45 and the end of the cylinder 4. A limiting protrusion 22 extends from the first support part 2 and extends into the strip groove 45. When the cylinder 4 is fitted onto the rod 1, it is only necessary to extend the limiting protrusion 22 into the strip groove 45 along the limiting groove 44, and then rotate the cylinder 4 around the rod 1 to make the limiting protrusion 22 misalign with the strip groove 45, so that the rod 1 and the cylinder 4 can be quickly engaged.

[0044] In some embodiments, the cylinder 4 includes a sleeve 5 and a collar 6. The sleeve 5 is fitted onto the rod 1, and the collar 6 is fitted onto the sleeve 5. An outer groove 51 is formed on the surface of the sleeve 5 that contacts the collar 6, and an inner extension 61 is formed on the inner surface of the collar 6 to engage with the groove 51, thereby connecting the sleeve 5 and the collar 6. At this time, a strip groove 45 is formed on the collar 6, and a limiting groove 44 is partially provided on the sleeve 5 and partially provided on the collar 6. When fixing the cylinder 4 on the rod 1, it is only necessary to rotate the collar 6 around the rod 1. As the collar 6 rotates around the rod 1, the limiting protrusion 22 slides within the strip groove 45. At this time, the limiting protrusion 22 is misaligned with the limiting groove 44 on the collar 6, thereby fixing the sleeve 5 and the collar 6 on the first support 2.

[0045] The assembly process of this utility model is as follows:

[0046] The inner extension 61 is inserted into the outer groove 51, and the sleeve 5 and the collar 6 are assembled to form the cylinder 4. The filter screen 7 is moved into the annular groove 46, and the limiting ring 72 is moved into the annular groove 46. The limiting ring 72 and the annular groove 46 are interference-fitted, and the filter screen 7 is fixed on the sleeve 5. The first washer 21 is fitted onto the first support part 2 along the first annular groove 23, and the second washer 13 is fitted onto the rod 1 along the second annular groove 12. Along the axial direction of the rod 1, the end of the rod 1 near the nozzle 11 and the end of the sleeve 5 away from the filter screen 7 are aligned. The cylinder 4 is moved to fit onto the rod 1. During the movement of the cylinder 4, the position of the limiting protrusion 22 and the limiting groove 44 is adjusted so that the limiting protrusion 22 extends into the strip groove 45 along the limiting groove 44. After the limiting protrusion 22 extends into the strip groove 45, the collar 6 rotates around the sleeve 5. At this time, the limiting protrusion 22 moves in the strip groove 45 and the limiting protrusion 22 is misaligned with the limiting groove 44 on the collar 6. At this time, the relative position of the cylinder 4 and the rod 1 is fixed, and the assembly of the silent bubbling device is completed.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A silent bubbling device, characterized in that, The silent bubbling device includes: The rod body has nozzles; the nozzles are connected to a steam source. A first support portion is connected to the rod body; the outer contour of the first support portion extends beyond the outer contour of the rod body around the axis of the rod body. A cylindrical body is fitted onto the rod body; the first support portion contacts the inner wall of the cylindrical body and supports the cylindrical body; a cavity is provided between the cylindrical body and the rod body; a through hole is provided on the cylindrical body to communicate with the cavity; A second support portion is disposed within the cavity; The first support portion is sealed to the cylinder body; the nozzle opening is located on the side of the second support portion away from the first support portion.

2. The silent bubbling device as described in claim 1, characterized in that: A filter screen is provided at the end of the cylinder away from the first support; the filter screen is arranged perpendicular to the axial direction of the cylinder.

3. The silent bubbling device as described in claim 2, characterized in that: An annular groove is formed on the inner wall of the end of the cylinder away from the first support; the filter screen is disposed in the annular groove; a limiting ring is also disposed in the annular groove; the filter screen is disposed between the cylinder and the limiting ring.

4. The silent bubbling device as described in claim 1, characterized in that: The second support is fixedly connected to the cylinder; the second support is annularly sleeved on the rod; the second support divides the cavity into a first cavity and a second cavity; a connecting hole is opened on the second support to connect the first cavity and the second cavity.

5. The silent bubbling device as described in claim 4, characterized in that: At least two connection holes are provided; all connection holes are evenly distributed around the axis of the rod.

6. The silent bubbling device as described in claim 1, characterized in that: A first annular groove is formed on the first support portion around the axis of the rod body; a first washer is sleeved on the first support portion along the first annular groove; the first washer fills the gap between the first support portion and the cylinder body.

7. The silent bubbling device as described in claim 1, characterized in that: A second annular groove is formed on the rod body around its axis; a second washer is fitted onto the rod body along the second annular groove; the second washer fills the gap between the second support and the rod body.

8. The silent bubbling device as described in claim 1, characterized in that: The second support portion is located on the side near the first support portion, and has a concave arc transition with the cylinder body.

9. The silent bubbling device as described in claim 1, characterized in that: The end surface of the rod near the nozzle has a rounded chamfer with the side surface of the rod.

10. The silent bubbling device as described in claim 1, characterized in that: A strip groove is formed on the inner wall of the cylinder around the axis of the rod; a limiting groove is formed on the inner wall of the cylinder along the axis of the rod; the limiting groove connects the strip groove and the end of the cylinder; a limiting protrusion extends from the first support and enters the strip groove.

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