Spray head structure, foaming device and beverage equipment

Abstract

The utility model discloses a spray head structure, a foaming device and beverage equipment, and the spray head structure comprises a spray head body which is provided with an air inlet cavity and a spray hole communicated with the air inlet cavity; and the extension pipe is arranged on the outer wall surface of the spray head body and is communicated with the spray hole. According to the technical scheme, the needed orientation of the air injection outlet of the spray head structure can be achieved more conveniently.

Description

Technical Field

[0001] This utility model relates to the field of beverage equipment technology, and in particular to a nozzle structure, a foaming device, and a beverage equipment. Background Technology

[0002] Milk-based coffees are becoming increasingly popular, as the rich milk foam enhances the flavor and allows for latte art. Steam frothing is one of the most common methods for frothing milk in semi-automatic coffee machines, characterized by its rich texture and ease of use. However, the direction of the steam wand's nozzle is crucial for achieving optimal frothing results. Utility Model Content

[0003] The main objective of this invention is to propose a nozzle structure that allows for easier alignment of the jet outlet of the nozzle structure with the desired direction.

[0004] To achieve the above objectives, the nozzle structure proposed in this utility model includes:

[0005] The nozzle body includes an air inlet chamber and a spray hole communicating with the air inlet chamber; and

[0006] An extension tube is provided on the outer wall surface of the nozzle body and communicates with the spray hole.

[0007] Optionally, the extension tube is integrally formed with the nozzle body.

[0008] Optionally, the extension tube is welded or bonded to the nozzle body.

[0009] Optionally, the extension tube is detachably connected to the nozzle body.

[0010] Optionally, the extension tube is connected to the nozzle body via a threaded joint structure.

[0011] Optionally, the extension tube is arranged as a straight tube.

[0012] Optionally, the outlet of the extension tube away from the nozzle body is a jet outlet. The nozzle body has a nozzle axis extending in a first direction, and the jet outlet has a jet centerline extending in a second direction. On a reference plane passing through the jet centerline of the jet outlet and perpendicular to the nozzle axis, the line connecting the projection point of the nozzle axis and the jet centerline forms an angle with the jet centerline or its projection line.

[0013] Optionally, the distance from the projection point of the nozzle axis to the reverse extension of the projection line of the jet centerline is greater than or equal to 3 mm.

[0014] Optionally, the jet centerline is set at an angle to the reference plane.

[0015] Optionally, the extension tube is configured as a curved tube.

[0016] Optionally, multiple nozzles and extension tubes are provided in a one-to-one correspondence, and the multiple nozzles are spaced apart in the circumferential direction of the nozzle body.

[0017] This utility model also proposes a foaming device, including the aforementioned nozzle structure.

[0018] This utility model also proposes a beverage device, including the aforementioned nozzle structure and / or the aforementioned foaming device.

[0019] In the technical solution of this utility model, the channel of the nozzle and the pipe of the extension tube together constitute the airflow channel of the nozzle structure. It can be understood that the extension tube makes the airflow channel longer, thereby making it easier to achieve the required orientation of the air outlet of the airflow channel, because changing the direction of the extension tube is easier to achieve than changing the direction of the nozzle. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a top view schematic diagram of an application scenario of an embodiment of the nozzle structure of this utility model;

[0022] Figure 2 This is a side view schematic diagram of an application scenario of an embodiment of the nozzle structure of this utility model;

[0023] Figure 3 This is a side view of the first embodiment of the nozzle structure of this utility model;

[0024] Figure 4 for Figure 3 A bottom-view diagram of the central nozzle structure;

[0025] Figure 5 This is a bottom view of the second embodiment of the nozzle structure of this utility model;

[0026] Figure 6 This is a side view of the third embodiment of the nozzle structure of this utility model;

[0027] Figure 7 This is a side view of the fourth embodiment of the nozzle structure of this utility model;

[0028] Figure 8 This is an exploded schematic diagram of the nozzle structure and steam pipe according to the fifth embodiment of this utility model;

[0029] Figure 9 This is a schematic diagram of the nozzle structure and steam pipe assembly according to the sixth embodiment of this utility model;

[0030] Figure 10 This is a schematic diagram of the nozzle structure and steam pipe assembly according to the seventh embodiment of the present invention;

[0031] Figure 11 This is a schematic diagram of the nozzle structure and steam pipe assembly according to the eighth embodiment of the present invention;

[0032] Figure 12 This is a schematic diagram of the nozzle structure and steam pipe assembly according to the ninth embodiment of this utility model.

[0033] Explanation of icon numbers:

[0034] 10. Nozzle body; 11. Air jet channel; 11c. Auxiliary air jet channel; 111. Air jet outlet; 12. Inlet chamber; 121. Inlet; 122. Guide protrusion; 13. Nozzle; 14. Extension tube; 15. Positioning groove; 10a. First sub-cavity; 10b. Second sub-cavity; 101. First nozzle body; 102. Second nozzle body; 20. Steam pipe; 21. Pipe body; 22. Mounting head; 221. Connecting cavity; 222. Transition cavity; 23. Positioning step; 20a. First channel; 20b. Second channel; 201. Inner tube; 202. Outer tube; 30. Temperature sensor; 31. Temperature sensing part; 32. Wire; 41. First seal; 42. Second seal; 421. Limiting protrusion

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] This utility model proposes a nozzle structure.

[0040] Reference Figures 3 to 5 In one embodiment of this utility model, the nozzle structure includes:

[0041] The nozzle body 10 includes an air inlet chamber 12 and a spray hole 13 communicating with the air inlet chamber 12; and

[0042] An extension tube 14 is provided on the outer wall of the nozzle body 10 and communicates with the nozzle hole 13.

[0043] It is understood that in this embodiment, the channel of the nozzle 13 and the pipe of the extension tube 14 together constitute the jet flow channel 11 of the nozzle structure. It is understood that the extension tube 14 makes the jet flow channel 11 longer, thereby making it easier to achieve the required orientation of the jet outlet 111 of the jet flow channel 11, because changing the direction of the extension tube 14 is easier to achieve than changing the direction of the nozzle 13.

[0044] Optionally, the extension tube 14 and the nozzle body 10 are integrally formed. On the one hand, an integrally formed structure is generally beneficial for batch processing and can improve the processing efficiency of the product. On the other hand, the integrally formed structure is structurally stable and not prone to breakage, and there are no air leakage gaps at the connection, thereby preventing the reduction of foaming efficiency due to air leakage. However, this design is not limited to this. In other embodiments, the extension tube 14 and the nozzle body 10 can also be welded or bonded together.

[0045] In some other embodiments, the extension tube 14 is detachably connected to the nozzle body 10 to facilitate replacement of a damaged extension tube 14 or unclogging of a blocked extension tube 14. Optionally, the extension tube 14 and the nozzle body 10 are detachably connected via a threaded pair structure. Specifically, the outer orifice of the spray hole 13 has an internal thread, and the outer tube surface of the extension tube 14 has an external thread, achieving a detachable connection through the engagement of the internal and external threads. In particular, the threaded pair structure also has a certain degree of sealing capability. Of course, a sealing structure may also be optionally provided between the nozzle body 10 and the extension tube 14. Furthermore, the nozzle body 10 and the extension tube 14 may also be detachably connected via, but not limited to, a snap-fit ​​structure.

[0046] Reference Figures 1 to 5 In one embodiment, the nozzle body 10 has a nozzle axis (typically the axis of the air intake chamber 12) extending in a first direction, the jet outlet 111 is located outside the nozzle axis, and the jet outlet 111 has a jet centerline extending in a second direction. On a reference plane passing through the jet center point of the jet outlet 111 and perpendicular to the nozzle axis, the line connecting the projection point of the nozzle axis and the jet center point forms an angle α with the jet center line or its projection line. This ensures that the steam ejected from the jet outlet 111 has a tangential component of a circle centered on the projection point of the nozzle axis. This tangential component allows the steam to drive the liquid in a vortex-like flow. Therefore, when foaming, simply inserting the nozzle structure into the center or near the center of the liquid to be foamed, and tilting the jet outlet 111 towards the bottom of the foaming container, will create a vortex-like flow and cause the liquid to tumble inside and outside the container, achieving a good foaming effect. In other words, the nozzle structure provided by this invention enables foaming through simpler operation, thereby lowering the barrier to entry for using foaming devices equipped with this nozzle structure.

[0047] It should be noted that when the jet centerline is located on the reference plane, the user only needs to adjust the tilt angle of the nozzle structure, as long as the jet outlet 111 and the bottom of the drawing cup have a certain tilt angle; while when the jet centerline and the reference plane have an angle, the user only needs to extend the nozzle structure vertically to a position close to the liquid surface, so that the jet outlet 111 and the bottom of the drawing cup have a certain tilt angle. In this case, the projection line of the jet centerline on the reference plane is set at an angle α with the aforementioned connecting line.

[0048] Optionally, on the reference plane, the distance L from the projection point of the nozzle axis to the jet centerline or the reverse extension of its projection line is greater than or equal to 2 mm. It can be understood that the farther the tangential airflow is from the nozzle axis, that is, the farther the tangential airflow is from the center of the liquid to be foamed, the better the vortex effect produced. In this embodiment, L ≥ 2 mm to ensure a good vortex effect produced by the nozzle structure. Further, L ≥ 3 mm to further improve the lower limit of the vortex effect produced by the nozzle structure.

[0049] It is worth mentioning that, when the diameter of the circle containing the jet outlet 111 is constant, that is, when the outer diameter of the nozzle structure is constant, the larger the included angle α, the larger the length L, and the better the vortex effect of the steam on the liquid. However, the larger the included angle α, the more difficult it is to manufacture the nozzle structure. Conversely, when the included angle α is constant, the larger the outer diameter of the nozzle structure, the larger the length L, and the better the vortex effect of the steam on the liquid. However, the larger the outer diameter of the nozzle structure, the higher the material cost required for the nozzle structure, and it may not be suitable for smaller drawing cylinders. To balance lower manufacturing difficulty, lower cost, and wider product applicability, the included angle α can be selected from 10° to 45°, and the diameter of the circle containing the jet outlet 111 (i.e., the outer diameter of the nozzle structure) can be selected from 10mm to 30mm.

[0050] Reference Figure 1 , Figure 4 and Figure 5 Furthermore, at least a portion of the jet flow channel 11 extends along a curve. It can be understood that for the portion extending along the curve, the deflection angle gradually increases in the direction from the inside to the outside, which is conducive to forming a larger included angle α at the jet outlet 111.

[0051] Optionally, in the direction away from the nozzle axis, the curvature of the portion of the jet channel 11 extending along the curve gradually increases; it can be understood that the greater the curvature, the greater the degree of bending, the faster the deflection angle increases, which is more conducive to achieving a larger included angle α.

[0052] Optionally, the jet channel 11 extends entirely along a curve. However, this design is not limited to this; in other embodiments, the jet channel 11 may also have a portion that extends in a straight line.

[0053] In one embodiment, reference is made to Figure 5 Only at least a portion of the nozzle 13 is configured to extend along a curve, while the extension tube 14 is configured as a straight tube. However, this design is not limited to this; in another embodiment, see [reference needed]. Figure 4Alternatively, at least a portion of the extension pipe 14 can be configured to extend along a curve. Typically, the entire extension pipe 14 can be configured to extend along a curve, i.e., the extension pipe is configured as a curved pipe. In yet another embodiment, at least a portion of both the nozzle 13 and the extension pipe 14 can be configured to extend along a curve.

[0054] Reference Figure 2 and Figure 3 Furthermore, the jet centerline is set at an angle β with the reference plane. In this way, the user only needs to vertically extend the nozzle structure to a position close to the liquid surface to make the jet outlet 111 have a certain tilt angle with the bottom of the frothing pitcher cup (making the foaming operation simpler). This makes the steam ejected from the jet outlet 111 tilted relative to the liquid surface, so that the steam jet can create a local negative pressure cavity on the liquid surface and entrain outside air, thereby helping the liquid to produce better air intake and foaming effect.

[0055] It is worth noting that when the included angle β is closer to 90°, the liquid surface turbulence formed by the steam jet is weaker, the air entrainment effect is poor, and the sizing effect is not good; while when the included angle β is closer to 0°, the steam jet is prone to liquid overflow and splashing. To balance good sizing effect with reducing liquid overflow and splashing, the included angle β can be selected as: 20°≤β≤70°. To better balance good sizing effect with further reducing liquid overflow and splashing, the included angle β can be further selected as: 30°≤β≤60°.

[0056] Furthermore, multiple jet outlets 111 are provided, spaced circumferentially around the nozzle axis. This allows for more efficient formation of higher-quality vortices within the nozzle cylinder and creates a larger negative pressure chamber for air entrainment, ultimately resulting in finer bubbles. Additionally, the multiple jet outlets 111 ensure that the horizontal components of the reverse thrust of the steam jets emitted from each outlet cancel each other out or nearly cancel each other out, thus eliminating the need for the user to consider the impact of horizontal displacement of the nozzle structure on the pattern. Of course, in this invention, only one jet outlet 111 can be provided. In this case, additional force is required during the pattern-making operation to limit the translation of the nozzle structure. This additional force can be applied by the user or provided by fixing the nozzle structure in one location, with the user simply holding the nozzle cylinder in conjunction with the nozzle structure. Further optionally, the plurality of jet outlets 111 are evenly spaced in the circumferential direction around the nozzle axis to completely counteract the horizontal components of each reverse thrust and make the liquid bubbles at each position more uniform.

[0057] It is understood that if the number of air jet outlets 111 is too small, the foaming effect of the liquid bubbles will be weak; if the number of air jet outlets 111 is too large, the processing will be more difficult. In this embodiment, in order to balance good foaming effect and easy processing, the number of air jet outlets 111 can be selected as 3 or 4.

[0058] Reference Figure 3 Without loss of generality, the nozzle structure also includes an air inlet 121 communicating with the air inlet chamber 12, which is used to communicate with the steam generator. In this embodiment, multiple jet channels 11 are connected to the same air inlet chamber 12, meaning that the steam generated by the steam generator is usually first transported to the air inlet chamber 12 through the steam pipe 20 for buffering and pressurization, and then ejected through each jet channel 11 and each jet outlet 111.

[0059] Furthermore, referring to Figure 6 The inner cavity surface of the air intake chamber 12 includes a bottom surface at the end of the first direction. The bottom surface of the chamber is provided with a guide protrusion 122. The cross-sectional area of ​​the guide protrusion 122 gradually increases in the first direction. The jet flow channel 11 has an inner flow channel opening that communicates with the air intake chamber 12. The inner flow channel opening is located close to the guide protrusion 122. In this way, the steam entering the air intake chamber 12 can be guided to the inner flow channel opening of the jet flow channel 11 through the circumferential surface of the guide protrusion 122, making the airflow in the nozzle structure smoother. This is conducive to forming a steam jet with stronger kinetic energy at the jet outlet 111, improving the foaming success rate and increasing the foaming effect.

[0060] Reference Figure 6 In this embodiment, the guide protrusion 122 is cone-shaped, and the tip of the cone can effectively divert steam. However, this design is not limited to this; in other embodiments, the guide protrusion 122 may also be partially spherical or frustum-shaped.

[0061] When multiple jet channels 11 are provided, the multiple jet channels 11 are spaced apart in the circumferential direction around the guide protrusion 122, so as to better utilize the airflow guided by the guide protrusion 122 in various directions, so that the airflow can flow smoothly into each jet channel 11.

[0062] Optionally, the inner cavity surface of the air intake cavity 12 also includes a cavity side surface adjacent to the cavity bottom surface. The inner flow channel is located on the cavity side surface near the cavity bottom surface, so that the jet flow channel 11 extends outward toward the side of the nozzle structure, thereby making the airflow flow more smoothly toward the periphery of the nozzle structure and more conducive to the formation of vortex effect.

[0063] Furthermore, referring to Figure 7The nozzle structure is also provided with an auxiliary jet channel 11c that communicates with the air inlet chamber 12. The auxiliary jet channel 11c extends along the first direction. Thus, when the nozzle structure extends vertically into the cup of the foaming cylinder, the auxiliary jet channel 11c can form a jet of steam perpendicular to the bottom of the foaming cylinder, thereby enhancing the disturbance effect of the vortex center or near the vortex center of the liquid to be foamed, and improving the bubble formation efficiency.

[0064] Optionally, the centerline of the auxiliary jet channel 11c coincides with the nozzle axis to enhance the disturbance effect on the vortex center of the liquid to be foamed. However, this design is not limited to this; in other embodiments, the centerline of the auxiliary jet channel 11c may also be offset from the nozzle axis. It should also be noted that there may be only one auxiliary jet channel 11c or multiple auxiliary jet channels 11c to further enhance the disturbance effect on or near the vortex center.

[0065] Furthermore, when the first direction is vertically downward, the auxiliary jet channel 11c connects to the lowest point of the air intake chamber 12, so that the auxiliary jet channel 11c can also facilitate the drainage of residual water in the air intake chamber 12, thereby reducing the probability of bacterial growth in the air intake chamber 12. Optionally, the auxiliary jet channel 11c has an inner channel opening that communicates with the air intake chamber 12. When the first direction is vertically downward, the inner surface of the air intake chamber 12 is gradually inclined downward in the direction towards the inner channel opening, so as to further facilitate the flow of residual water to the auxiliary jet channel 11c, thereby making it easier to drain the residual water.

[0066] The inner diameter of the steam pipe 20 is a first inner diameter, and at least a portion of the inner diameter of the air inlet chamber 12 is a second inner diameter. Optionally, the second inner diameter is larger than the first inner diameter, that is, the cross-sectional area of ​​the air inlet chamber 12 is larger than the cross-sectional area of ​​the steam pipe 20. This facilitates the opening of multiple jet channels 11 and allows the distance between the jet outlet 111 and the nozzle axis to be greater, thus promoting the formation of a larger vortex effect. Furthermore, it facilitates the buffering and pressurization of steam by the air inlet chamber 12, also contributing to the formation of a larger vortex effect.

[0067] Reference Figure 8In one embodiment, the nozzle structure includes a nozzle body 10 with an opening. The air inlet chamber 12 and the jet flow channel 11 are both located within the nozzle body 10, and the air inlet chamber 12 communicates with the opening. The nozzle body 10 is fitted onto the outer surface of the steam pipe 20 through the opening. It is understood that the wall of the steam pipe 20 has a certain thickness. By fitting the opening onto the outer surface of the steam pipe 20, the inner diameter of the air inlet chamber 12 can be directly increased using the wall thickness of the steam pipe 20. Thus, the structure of the nozzle body 10 is relatively simple and easy to manufacture.

[0068] Optionally, the opening of the nozzle body 10 is detachably connected to the steam pipe 20 to facilitate maintenance or replacement of the jet structure if it is blocked or damaged. Alternatively, the opening of the nozzle body 10 and the steam pipe 20 can also be connected via, but not limited to, a riveting or adhesive structure. Further optionally, the opening of the nozzle body 10 and the steam pipe 20 are detachably connected via a threaded pair. Specifically, the opening of the nozzle body 10 has an internal thread, and the outer surface of the steam pipe 20 has an external thread, achieving a detachable connection through the engagement of the internal and external threads. In particular, the threaded pair structure also has a certain degree of sealing capability. Of course, a sealing structure can also be optionally provided between the opening of the nozzle body 10 and the steam pipe 20. Additionally, the opening of the nozzle body 10 and the steam pipe 20 can also be detachably connected via, but not limited to, a snap-fit ​​structure.

[0069] Optionally, a positioning structure is provided between the opening of the nozzle body 10 and the steam pipe 20 to limit the depth of the steam pipe 20 extending into the air intake chamber 12, thereby ensuring a larger volume of the air intake chamber 12 and thus ensuring a better buffering and pressurization effect. Further optionally, the positioning structure includes a positioning groove 15 located around the periphery of the opening of the nozzle body 10 and a positioning step 23 located on the outer surface of the steam pipe 20, so that the depth of the steam pipe 20 extending into the air intake chamber 12 is limited by the cooperation of the positioning groove 15 and the positioning step 23.

[0070] Reference Figure 9In another embodiment, the steam pipe 20 includes a pipe body 21 with an inner diameter equal to the first inner diameter, and a mounting head 22 integrally connected to the pipe body 21. The outer diameter of the mounting head 22 is larger than the outer diameter of the pipe body 21, and a connecting cavity 221 is formed within the mounting head 22. The inner diameter of the connecting cavity 221 is a third inner diameter, which is larger than the second inner diameter. The nozzle structure includes a nozzle body 10 with an open opening. The air inlet chamber 12 and the jet flow channel 11 are both located on the nozzle body 10, and the air inlet chamber 12 communicates with the open opening. The mounting head 22 is fitted onto the outer peripheral surface of the open end of the nozzle body 10 through the connecting cavity 221. In this embodiment, an mounting head 22 is added to the end of the main body 21 of the steam pipe 20 to achieve connection with the nozzle body 10. The mounting head 22 is relatively thick, facilitating a reliable connection with the also relatively thick nozzle body 10. Furthermore, the open-ended nozzle body 10 is easy to manufacture. Optionally, in this embodiment, the main body 21 and the mounting head 22 are integrally formed. However, this design is not limited to this; in other embodiments, the mounting head 22 and the main body 21 may also be welded together, but not limited to this.

[0071] Optionally, a transition cavity 222 is also formed inside the mounting head 22. One end of the transition cavity 222 is connected to the pipe body 21, and the other end is connected to the connecting cavity 221. The cross-sectional area of ​​the transition cavity 222 is gradually expanded in the direction close to the connecting cavity 221, so that the steam flowing from the pipe body 21 can diffuse to the air inlet cavity 12 through the transition cavity 222, that is, the steam can enter the air inlet cavity 12 more smoothly.

[0072] Optionally, the open end of the nozzle body 10 is detachably connected to the connecting cavity 221 of the mounting head 22 to facilitate maintenance or replacement of the air jet structure. Alternatively, the open end of the nozzle body 10 and the connecting cavity 221 of the mounting head 22 can also be connected via, but not limited to, a riveting or adhesive structure. Further, the open end of the nozzle body 10 and the connecting cavity 221 of the mounting head 22 can be detachably connected via a threaded pair. Specifically, the outer circumferential surface of the open end of the nozzle body 10 has an external thread, and the side surface of the connecting cavity 221 of the mounting head 22 has an internal thread. The detachable connection is achieved through the engagement of the external and internal threads. In particular, the threaded pair structure also has a certain degree of sealing capability. A sealing structure can also be optionally provided between the open end of the nozzle body 10 and the connecting cavity 221 of the mounting head 22. Additionally, the open end of the nozzle body 10 and the connecting cavity 221 of the mounting head 22 can also be detachably connected via, but not limited to, a snap-fit ​​structure.

[0073] Reference Figure 10 In another embodiment, the nozzle structure includes a first nozzle body 101 and a second nozzle body 102 connected together. The air inlet chamber 12 includes a first sub-chamber 10a disposed within the first nozzle body 101 and a second sub-chamber 10b disposed within the second nozzle body 102. The inner diameter of the second sub-chamber 10b is the second inner diameter. The air jet channels 11 are all disposed within the second nozzle body 102. The inner diameter of the first sub-chamber 10a is a fourth inner diameter, which is smaller than the second inner diameter. The second sub-chamber 10b is connected to the steam pipe 20 through the first sub-chamber 10a. This embodiment, by dividing the nozzle structure with a larger inner cavity into at least two spliced ​​parts, facilitates the processing and forming of the larger inner cavity.

[0074] Optionally, the inner diameter of the portion of the first sub-cavity 10a near the second sub-cavity 10b is gradually increased in the direction near the second sub-cavity 10b, so that the steam flowing from the steam pipe 20 can diffuse through the gradually expanding portion of the first sub-cavity 10a to the second sub-cavity 10b, that is, the steam can enter the second sub-cavity 10b more smoothly.

[0075] Optionally, the first nozzle body 101 and the second nozzle body 102 are detachably connected. This allows for replacement of only the first nozzle body 101 or the second nozzle body 102 if either needs replacement, thus facilitating maintenance of the airflow channel 11 and reducing blockages. Alternatively, the first nozzle body 101 and the second nozzle body 102 can be connected via, but not limited to, riveting or adhesive connections. Further, the first nozzle body 101 and the second nozzle body 102 are detachably connected via a threaded joint. This threaded joint structure provides a degree of sealing; a sealing structure may also be provided between the first nozzle body 101 and the second nozzle body 102. Additionally, the first nozzle body 101 and the second nozzle body 102 can be detachably connected via, but not limited to, a snap-fit ​​connection.

[0076] Optionally, the first nozzle body 101 is detachably connected to the steam pipe 20 to facilitate maintenance or replacement of the jet structure in case of blockage or damage. Further, the first nozzle body 101 and the steam pipe 20 are detachably connected via a threaded joint. Specifically, the threaded joint structure also has a certain degree of sealing capability. Of course, a sealing structure may also be optionally provided between the first nozzle body 101 and the steam pipe 20. Additionally, the first nozzle body 101 and the steam pipe 20 may also be detachably connected via, but not limited to, a snap-fit ​​structure.

[0077] Reference Figure 11 and Figure 12 In one embodiment, a temperature sensor 30 is further installed on the nozzle structure to detect the liquid temperature in the latte art container. The temperature sensor 30 includes a temperature sensing part 31 and a wire 32 connected to the temperature sensing part 31. The wire 32 passes sequentially through the steam pipe 20 and the air inlet chamber 12, and the temperature sensing part 31 is sealed through the wall of the air inlet chamber 12. This embodiment, by adding the temperature sensor 30, enhances the nozzle structure's liquid temperature measurement function, enabling the acquisition of the beverage temperature while creating latte art, thus enriching the nozzle structure's functionality. Furthermore, by passing the wire 32 of the temperature sensor 30 through the steam pipe 20, the exposed wire 32 of the temperature sensor 30 is avoided, preventing it from affecting the user's latte art operation.

[0078] Furthermore, the steam pipe 20 is provided with a first channel 20a and a second channel 20b extending in parallel. The first channel 20a is connected to the air inlet chamber 12, and the second channel 20b is isolated from the air inlet chamber 12. The wire 32 passes through the second channel 20b. In this way, mutual influence between the steam and the wire 32 can be avoided. It can be understood that the high temperature of the steam can easily accelerate the aging of the insulation layer of the wire 32. At the same time, the wire 32 is also prone to accumulating dirt or releasing odors at high temperatures, thus affecting the cleanliness of the steam.

[0079] Reference Figure 11 In one embodiment, the steam pipe 20 includes an inner pipe 201 and an outer pipe 202 sleeved outside the inner pipe 201. The first channel 20a is formed between the outer pipe 202 and the inner pipe 201, and the second channel 20b is the inner pipe of the inner pipe 201. That is, the wire 32 passes through the inner pipe 201. Steam enters the air inlet chamber 12 through the space between the outer pipe 202 and the inner pipe 201. In this way, the mutual influence between the steam and the wire 32 can be avoided.

[0080] Optionally, the cavity wall of the air intake chamber 12 is provided with a temperature sensing mounting hole, and the temperature sensing part 31 is installed through the temperature sensing mounting hole. A first sealing element 41 is provided between the end of the inner tube 201 near the temperature sensing part 31 and the temperature sensing mounting hole. In this way, the first sealing element 41 not only seals the gap between the temperature sensing part 31 and the temperature sensing mounting hole, but also isolates the inner tube 201 from the air intake chamber 12, realizing the sealing of two positions with one sealing element, which can simplify the structure of the product.

[0081] Reference Figure 12In another embodiment, the steam pipe 20 includes an inner pipe 201 and an outer pipe 202 sleeved outside the inner pipe 201. The first channel 20a is the inner pipe of the inner pipe 201, and the second channel 20b is formed between the outer pipe 202 and the inner pipe 201. That is, the wire 32 passes through the space between the outer pipe 202 and the inner pipe 201. Steam enters the air inlet chamber 12 through the inner pipe 201, thus avoiding mutual interference between the steam and the wire 32. In particular, high-temperature steam only flows in through the inner pipe 201, that is, no high-temperature steam flows into the space between the outer pipe 202 and the inner pipe 201. Therefore, the temperature of the outer pipe 202 is hardly affected by the high-temperature steam, thus maintaining a relatively low temperature. In this way, even if the outer pipe 202 is not insulated, the user will not be burned, and the overall structure of the product can be simplified.

[0082] Optionally, the wall of the air intake chamber 12 is provided with a temperature sensing mounting hole, and the temperature sensing part 31 is installed through the temperature sensing mounting hole. The nozzle structure is also provided with an air inlet 121 communicating with the air intake chamber 12, and the outer tube 202 is connected to the air inlet 121. The air intake chamber 12 is also provided with a second sealing member 42. The first end of the second sealing member 42 seals the air inlet 121, and the second end seals the temperature sensing mounting hole. The inner tube 201 passes through the second sealing member 42 from the end face of the first end and exits from the circumferential surface of the second sealing member 42 to communicate with the air intake chamber 12. The wire 32 passes through the second sealing member 42 from the end face of the second end and exits from the end face of the first end to the space between the outer tube 202 and the inner tube 201. In this way, the second seal 42 not only blocks the gap between the temperature sensing part 31 and the temperature sensing mounting hole, but also isolates the space between the outer tube 202 and the inner tube 201 from the connection with the air intake chamber 12, thus achieving one seal to block two positions and simplifying the product structure.

[0083] Optionally, the inner tube 201 includes a first inner tube section extending into the second seal 42 from the end face of the first end, and a second inner tube section extending out from the circumferential surface of the second seal 42. The first inner tube section is connected to the second inner tube section, and the included angle between the first inner tube section and the second inner tube section is an obtuse angle. In this way, steam can enter the air inlet chamber 12 more smoothly, which is conducive to forming a steam jet with stronger kinetic energy at the jet outlet 111, improving the success rate of foaming and increasing the foaming effect.

[0084] Optionally, the second seal 42 is provided with a limiting protrusion 421 corresponding to the inner edge of the air inlet 121 to limit the length of the second seal 42 extending into the air inlet 121, thereby helping to ensure the effectiveness of the second seal 42 in sealing the gap between the temperature sensing part 31 and the temperature sensing mounting hole.

[0085] It is worth mentioning that, in this embodiment, the nozzle structure may optionally include a first nozzle body 101 and a second nozzle body 102 that are detachably connected. The air intake chamber 12 is formed between the first nozzle body 101 and the second nozzle body 102. The air inlet 121 is located in the first nozzle body 101, and the temperature sensing mounting hole is located in the second nozzle body 102 to facilitate the installation of the second sealing member 42. Typically, the jet flow channel 11 is located in the second nozzle body 102.

[0086] This utility model also proposes a foaming device, which includes a connected steam pipe and a nozzle structure. The specific structure of the nozzle structure is as described in the above embodiments. Since this foaming device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0087] This utility model also proposes a beverage device, which includes a nozzle structure and / or a foaming device. The specific structure of the nozzle structure and / or foaming device is as described in the above embodiments. Since this beverage device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. This beverage device can be a coffee machine or other equipment that requires foaming operations on the surface of the beverage liquid it is making.

[0088] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A nozzle structure, characterized in that, The nozzle structure includes: The nozzle body includes an air inlet chamber and a spray hole communicating with the air inlet chamber; and An extension tube is provided on the outer wall surface of the nozzle body and communicates with the spray hole; The nozzles and the extension tubes are provided in a one-to-one correspondence, and the nozzles are spaced apart in the circumferential direction of the nozzle body.

2. The nozzle structure as described in claim 1, characterized in that, The extension tube is integrally formed with the nozzle body; or The extension tube is welded or bonded to the nozzle body.

3. The nozzle structure as described in claim 1, characterized in that, The extension tube is detachably connected to the nozzle body.

4. The nozzle structure as described in claim 3, characterized in that, The extension tube is connected to the nozzle body via a threaded joint structure.

5. The nozzle structure as described in claim 1, characterized in that, The extension tube is arranged in a straight line.

6. The nozzle structure as described in claim 1, characterized in that, The outlet of the extension tube away from the nozzle body is a jet outlet. The nozzle body has a nozzle axis extending in a first direction, and the jet outlet has a jet centerline extending in a second direction. On a reference plane passing through the jet center point of the jet outlet and perpendicular to the nozzle axis, the line connecting the projection point of the nozzle axis and the jet center point forms an angle with the jet centerline or its projection line.

7. The nozzle structure as described in claim 6, characterized in that, The distance from the projection point of the nozzle axis to the backward extension of the projection line of the jet centerline is greater than or equal to 3 mm; and / or The jet centerline is set at an angle to the reference plane; and / or The extension tube is configured as a curved tube.

8. A foaming device, characterized in that, Includes the nozzle structure as described in any one of claims 1 to 7.

9. A beverage equipment, characterized in that, Includes the nozzle structure as described in any one of claims 1 to 7 and / or the foaming device as described in claim 8.

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