Steam jet, steam rod and beverage equipment

Abstract

The utility model discloses a steam jet, steam stick and drink equipment, wherein the steam jet is used for whipping liquid bubbles and is provided with an air inlet cavity, an air injection flow channel communicated with the air inlet cavity and a flow guide convex part towards the inside of the air inlet cavity, the air injection flow channel is provided with an air injection inlet communicated with the air inlet cavity, and the flow guide convex part faces the inside of the air inlet cavity. And the air injection inlet is formed in the periphery of the flow guide convex part. According to the technical scheme, liquid residues in the steam jet can be reduced, cleaning of the steam jet is facilitated, and the blocking probability of the steam jet flow channel can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of beverage equipment, in particular to a steam nozzle, a steam wand and beverage equipment. Background Art

[0002] Milk coffee is becoming increasingly popular, as dense milk foam enhances the coffee's flavor and creates latte art. Steam wands typically feature a steam nozzle that emits a high-speed steam jet, creating dense, glossy milk foam. However, after frothing, conventional steam wands often retain liquid in the steam nozzle, making it difficult to clean and easily clogging the steam nozzle's airflow path. Utility Model Content

[0003] The main purpose of the utility model is to provide a steam nozzle, which aims to reduce liquid residue in the steam nozzle, thereby facilitating the cleaning of the steam nozzle and reducing the probability of clogging of the jet flow channel.

[0004] To achieve the above-mentioned purpose, the steam nozzle proposed in the present invention is used for beating liquid bubbles, and is provided with an air inlet cavity, an air jet flow channel connected to the air inlet cavity, and a guide protrusion facing the air inlet cavity. The air jet flow channel has an air jet inlet connected to the air inlet cavity, and the air jet inlet is arranged on the periphery of the guide protrusion.

[0005] Optionally, the cross-sectional area of ​​the flow-guiding protrusion is gradually reduced in the protruding direction.

[0006] Optionally, the guide protrusion is arranged in a cone shape, a partial spherical shape or a truncated cone shape.

[0007] Optionally, a plurality of the jet flow channels are provided, and the plurality of the jet flow channels are spaced apart in the circumferential direction around the guide protrusion.

[0008] Optionally, the flow-guiding protrusion is provided at the bottom of the air inlet cavity, and the air jet inlet is provided at the side surface or the bottom surface of the air inlet cavity.

[0009] Optionally, the guide protrusion has a height higher than the air injection inlet.

[0010] Optionally, an outlet of the jet flow channel away from the air inlet cavity is a jet outlet, and the jet flow channel is eccentrically arranged relative to the air inlet cavity at least at the jet outlet.

[0011] Optionally, the air inlet cavity has a nozzle axis, the jet outlet has a jet center line, and on a reference plane passing through the jet center point of the jet outlet and perpendicular to the nozzle axis, the distance from the projection point of the nozzle axis to the reverse extension line of the projection line of the jet center line is greater than or equal to 3 mm.

[0012] Optionally, the angle between the jet centerline and the reference plane is greater than or equal to 20° and less than or equal to 70°.

[0013] The present invention further provides a steam wand, comprising a steam pipe and the aforementioned steam nozzle, wherein the steam nozzle is further provided with an air inlet communicated with the air inlet cavity, and the steam pipe is provided at the air inlet.

[0014] The present invention further provides a beverage device, comprising a water tank, a heating device disposed in the water tank, and the aforementioned steam wand, wherein the steam wand is connected to the water tank through the steam pipe.

[0015] In the technical solution of the present invention, the steam nozzle is provided with an air inlet cavity, a jet flow channel connected to the air inlet cavity, and a guide convex portion facing the air inlet cavity, the jet flow channel has a jet inlet connected to the air inlet cavity, and the jet inlet is arranged on the periphery of the guide convex portion; in this way, the liquid storage space in the air inlet cavity can be reduced, thereby reducing the liquid residue in the steam nozzle, which is beneficial to the cleaning of the steam nozzle and reducing the probability of clogging of the jet flow channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 This is a schematic top view of an application scenario of an embodiment of the steam nozzle of the utility model;

[0018] Figure 2 This is a side view schematic diagram of an application scenario of an embodiment of the steam nozzle of the utility model;

[0019] Figure 3 This is a schematic diagram of the assembly of the steam nozzle and the steam pipe according to the first embodiment of the present invention;

[0020] Figure 4 for Figure 3 Schematic diagram of the side view of the application scenario of the steam nozzle;

[0021] Figure 5 for Figure 3 A schematic diagram of the steam nozzle in the middle viewed from above;

[0022] Figure 6 This is a bottom view schematic diagram of a second embodiment of the steam nozzle of the present invention;

[0023] Figure 7 This is a side view of a third embodiment of the steam nozzle of the present invention;

[0024] Figure 8 for Figure 7 A schematic diagram of the steam nozzle in the middle viewed from above;

[0025] Figure 9 This is a bottom view schematic diagram of a fourth embodiment of the steam nozzle of the present invention;

[0026] Figure 10 This is a side view of a fifth embodiment of the steam nozzle of the present invention;

[0027] Figure 11 This is a schematic diagram of an explosion of a steam nozzle and a steam pipe according to a sixth embodiment of the present invention;

[0028] Figure 12 This is a schematic diagram of the assembly of the steam nozzle and the steam pipe according to the seventh embodiment of the present invention;

[0029] Figure 13 Schematic diagram of the assembly of the steam nozzle and the steam pipe according to the eighth embodiment of the present invention.

[0030] Description of Figure Numbers:

[0031] 10. Nozzle body; 11. Jet channel; 111. Jet outlet; 12. Air inlet cavity; 121. Air inlet; 122. Flow guide protrusion; 13. Nozzle hole; 14. Extension tube; 15. Positioning sink; 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

[0032] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] The utility model provides a steam nozzle for foaming liquid. The steam nozzle can be connected to a steam generating device and foams liquid in the spraying direction while stirring the liquid by spraying steam.

[0037] Reference Figure 10 In one embodiment of the present invention, the steam nozzle comprises an air inlet chamber 12, an air jet channel 11 communicating with the air inlet chamber 12, and a guide protrusion 122 directed into the air inlet chamber 12. The air jet channel 11 comprises an air jet inlet communicating with the air inlet chamber 12, the air jet inlet being disposed on the periphery of the guide protrusion 122. This reduces the liquid storage space within the air inlet chamber 12, thereby reducing liquid residue within the steam nozzle, facilitating cleaning of the steam nozzle and reducing the probability of clogging of the air jet channel. It is worth noting that residual liquid within the steam nozzle can produce an unpleasant odor and result in a high amount of steam condensation within the steam nozzle during initial startup, thereby affecting the foaming effect and beverage flavor.

[0038] Optionally, the cross-sectional area of ​​the guide protrusion 122 is gradually reduced in the protruding direction; in this way, the steam entering the air inlet cavity 12 can be guided to the jet inlet of the jet channel 11 through the circumferential surface of the guide protrusion 122, so that the airflow in the steam nozzle is smoother, which is conducive to forming a steam jet with stronger kinetic energy at the jet outlet 111, thereby improving the success rate of bubbling and increasing the cotton-beating effect.

[0039] Reference Figure 10In this embodiment, the guide protrusion 122 is configured in a cone shape, and the tip of the cone can effectively divert the steam. However, the present design is not limited thereto. In other embodiments, the guide protrusion 122 can also be configured in a partially spherical or truncated cone shape, but is not limited thereto.

[0040] When there are multiple jet flow channels 11, the multiple jet flow channels 11 are spaced apart in the circumferential direction around the guide protrusion 122 to better utilize the airflow diverted in various directions by the guide protrusion 122, so that the airflow can flow smoothly into each jet flow channel 11.

[0041] In the present invention, the guide protrusion 122 is provided at the bottom of the air inlet cavity 12. Optionally, the jet inlet is provided at the side of the air inlet cavity 12 (see Figure 10 ), so that the jet flow channel 11 extends outward toward the side of the steam nozzle, thereby making the air flow toward the peripheral side of the steam nozzle smoother, which is more conducive to the formation of a vortex effect. However, the present design is not limited to this. In other embodiments, the jet inlet can also be provided on the bottom surface of the air inlet cavity 12 (see Figure 12 and Figure 13 ), so that the position of the jet inlet is lower, which is conducive to the complete discharge of the residual liquid; it can be understood that, in this case, the guide protrusion 122 only partially occupies the bottom surface of the air inlet cavity 12.

[0042] Optionally, the height of the guide protrusion 122 is higher than the air injection inlet, so as to facilitate the discharge of the stored liquid, thereby reducing the risks of the steam nozzle being difficult to clean, having odor, and being blocked.

[0043] Reference Figures 1 to 5In one embodiment, further, the outlet of the jet flow channel 11 away from the air inlet cavity 12 is a jet outlet 111 , and the jet flow channel 11 is eccentrically arranged relative to the air inlet cavity 12 at least at the jet outlet 111 . Specifically, the air inlet chamber 12 has a nozzle axis, and the jet outlet 111 has a jet center line. 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 is set at an angle α to the jet center line or its projection line. In this way, the steam ejected from the jet outlet 111 can have a tangential component of a circle centered on the projection point of the nozzle axis. This tangential component can enable the steam to drive the liquid to achieve a vortex flow. Therefore, when making bubbles, it is only necessary to extend the steam nozzle into the center or near-center position of the liquid to be foamed, and tilt the jet outlet 111 toward the bottom of the cup of the flower drawing cylinder. A vortex flow can be formed in the flower drawing cylinder and the liquid can be rolled inside and outside, thereby achieving a good foaming effect. That is, the steam nozzle provided by the technical solution of the present invention can achieve foaming through simpler operation, thereby lowering the usage threshold of the steam wand equipped with the steam nozzle.

[0044] It should be noted that, when the jet center line is located on the reference plane, the user needs to simply adjust the inclination angle of the steam nozzle, as long as there is a certain inclination angle between the jet outlet 111 and the bottom of the latte art cylinder cup; and when there is an angle between the jet center line and the reference plane, the user only needs to vertically extend the steam nozzle to a position close to the liquid surface, so that there is a certain inclination angle between the jet outlet 111 and the bottom of the latte art cylinder cup. In this case, the projection line of the jet center line on the reference plane is set at an angle α with the aforementioned connecting line.

[0045] Optionally, on the reference plane, the distance L from the projection point of the nozzle axis to the jet centerline or the reverse extension line 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. In this embodiment, L is ≥ 2 mm to ensure that the vortex effect generated by the steam nozzle is good. Furthermore, L is ≥ 3 mm to further increase the lower limit of the vortex effect that can be generated by the steam nozzle.

[0046] It is worth mentioning that, when the diameter of the circle where the jet outlet 111 is located is constant, that is, when the outer diameter of the steam nozzle is constant, the larger the angle α, the larger the L, and the better the vortex effect of the steam on the liquid. However, the larger the angle α, the more difficult it is to process the steam nozzle. When the angle α is constant, the larger the outer diameter of the steam nozzle, the larger the L, and the better the vortex effect of the steam on the liquid. However, the larger the outer diameter of the steam nozzle, the higher the material cost required for the steam nozzle, and it may not be suitable for smaller drawing cylinders. In order to balance lower processing difficulty, lower cost and a wider range of product applicability, the range of the angle α can be selected from 10° to 45°, and the diameter of the circle where the jet outlet 111 is located (that is, the outer diameter of the steam nozzle) can be selected from 10mm to 30mm.

[0047] 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 steam nozzle to a position close to the liquid surface, so that the jet outlet 111 and the bottom of the latte art cylinder cup have a certain inclination angle (the foaming operation is simpler), so that the steam ejected from the jet outlet 111 is inclined relative to the liquid surface, so that the steam jet can generate a local negative pressure cavity on the liquid surface and draw in the outside air, which is conducive to better air intake and flossing effects of the liquid.

[0048] It's worth noting that as the angle β approaches 90°, the steam jet creates a weaker liquid surface tumbling effect, less effective air entrainment, and poorer cotton-beating performance. Conversely, as the angle β approaches 0°, the steam jet is more likely to cause liquid overflow and splashing. To achieve both a good cotton-beating performance and minimize overflow and splashing, the angle β can be set within the range of 20° ≤ β ≤ 70°. To further achieve a better balance between maintaining a good cotton-beating performance and minimizing overflow and splashing, the angle β can be set within the range of 30° ≤ β ≤ 60°.

[0049] Furthermore, the jet outlets 111 are provided in plurality, and the plurality of jet outlets 111 are spaced circumferentially around the axis of the nozzle. This allows for more efficient formation of higher-quality vortices within the drawing cylinder, as well as a wider range of negative pressure chambers for entraining air, ultimately resulting in finer bubbles. Furthermore, the provision of multiple jet outlets 111 allows the horizontal components of the reverse thrust of the steam jets ejected from the jet outlets 111 at various locations to offset or nearly offset each other, thereby eliminating the need for the user to consider the impact of the horizontal displacement of the steam nozzle on the drawing process. Of course, in the present invention, only one jet outlet 111 may be provided. In this case, additional force is required to limit the translational movement of the steam nozzle during the drawing operation. This additional force may be applied by the user or by fixing the steam nozzle in place and providing this additional force through a fixed structure. The user only needs to hold the drawing cylinder to cooperate with the steam nozzle. Further optionally, the plurality of jet outlets 111 are evenly spaced in the circumferential direction around the axis of the nozzle to completely offset the horizontal components of the reverse thrusts and make the liquid bubbles at each position more uniform.

[0050] It is understood that if the number of the air jet outlets 111 is too small, the beating effect of the bubble will be weak; if the number of the air jet outlets 111 is too large, processing will be more difficult. In this embodiment, in order to achieve a good beating effect and easier processing, the number of the air jet outlets 111 can be selected to be 3 or 4.

[0051] Reference Figure 3 The steam nozzle is typically further provided with an air inlet 121 communicating with the air inlet cavity 12. The air inlet 121 is used to communicate with the steam generator. In this embodiment, multiple jet channels 11 are connected to the same air inlet cavity 12. This means that steam generated by the steam generator is typically first delivered to the air inlet cavity 12 via the steam pipe 20 for buffering and pressurization before being ejected through each jet channel 11 and through each jet outlet 111.

[0052] Reference Figure 6 Furthermore, at least part 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 from the inside to the outside, which is conducive to forming a larger angle α at the jet outlet 111.

[0053] Optionally, in the direction away from the nozzle axis, the curvature of the portion of the jet flow 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, and it is more conducive to the realization of a larger angle α.

[0054] Optionally, the entire jet flow channel 11 extends along a curve (eg Figure 6 However, the present design is not limited thereto, and in other embodiments, the jet flow channel 11 may also partially extend in a straight line.

[0055] The steam spray head generally includes a spray head body 10 provided with the air inlet cavity 12 and a spray hole 13 provided in the spray head body 10 . The air jet flow channel 11 includes a channel of the spray hole 13 .

[0056] In one embodiment, the jet flow channel 11 may only include the channel of the nozzle hole 13. In this case, the channel of the nozzle hole 13 at least partially extends along a curve, and usually extends along a curve as a whole (e.g. Figure 6 ), so as to reduce the wall thickness of the nozzle body 10 required to achieve a larger angle α, thereby reducing material cost and processing cost.

[0057] However, the present invention is not limited thereto. In another embodiment, referring to Figures 7 to 9 , the steam nozzle may further include an extension tube 14 provided on the outer wall of the nozzle body 10 and connected to the nozzle hole 13, and the jet flow channel 11 may also include a pipe of the extension tube 14. It can be understood that the provision of the extension tube 14 can make the jet flow channel 11 longer, thereby more conveniently achieving the desired orientation of the jet outlet 111, because the direction change of the extension tube 14 is easier to achieve than the direction change of the channel in the wall of the nozzle body 10. It should be noted that, in this embodiment, only at least a portion of the channel of the nozzle hole 13 can be set to extend along a curve (such as Figure 9 ), it is also possible to set at least a portion of the extension pipe 14 to extend along a curve (such as Figure 8 ), at least a portion of the nozzle hole 13 and at least a portion of the extension pipe 14 can also be arranged to extend along a curve.

[0058] Without loss of generality, the air inlet cavity 12 of the steam nozzle is connected to the steam pipe 20. The inner diameter of the steam pipe 20 is a first inner diameter, and the inner diameter of at least part of the air inlet cavity 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 cavity 12 is larger than the cross-sectional area of ​​the steam pipe 20. In this way, on the one hand, it can be beneficial to the opening of multiple jet flow channels 11, and the distance between the jet outlet 111 and the axis of the nozzle can be further, thereby being more conducive to the formation of a larger vortex effect; on the other hand, it can be beneficial to the buffering and pressurization of steam by the air inlet cavity 12, and also conducive to the formation of a larger vortex effect.

[0059] Reference Figure 11In one embodiment, the steam nozzle includes a nozzle body 10 having an opening. The air inlet cavity 12 and the air jet flow channel 11 are both provided in the nozzle body 10, and the air inlet cavity 12 is in communication with the opening. The nozzle body 10 is sleeved onto the outer tube 202 of the steam pipe 20 via the opening. It will be appreciated that the wall of the steam pipe 20 has a certain thickness. By sleeved onto the outer tube 202 of the steam pipe 20, the wall thickness of the steam pipe 20 can be utilized to directly increase the inner diameter of the air inlet cavity 12. As such, the structure of the nozzle body 10 is relatively simple and easy to manufacture.

[0060] Optionally, the open end of the nozzle body 10 is detachably connected to the steam pipe 20 to facilitate repair or replacement of the jet structure in the event of blockage. Of course, the open end of the nozzle body 10 and the steam pipe 20 may also be connected, but not limited to, by a riveted structure or an adhesive structure. Further, optionally, the open end of the nozzle body 10 and the steam pipe 20 are detachably connected via a threaded pair. Specifically, the open end of the nozzle body 10 is provided with an internal thread, and the outer tube 202 of the steam pipe 20 is provided with an external thread, and the detachable connection is achieved through the cooperation 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 open end of the nozzle body 10 and the steam pipe 20. Furthermore, the open end of the nozzle body 10 and the steam pipe 20 may also be detachably connected, but not limited to, by a snap-fit ​​structure.

[0061] Optionally, a positioning structure is provided between the opening of the nozzle body 10 and the steam pipe 20. This positioning structure limits the depth to which the steam pipe 20 extends into the air inlet cavity 12, thereby ensuring a larger volume of the air inlet cavity 12 and thereby ensuring a better buffering and pressurizing effect. Further optionally, the positioning structure includes a positioning groove 15 provided on the periphery of the opening of the nozzle body 10 and a positioning step 23 provided on the outer tube 202 of the steam pipe 20. The positioning groove 15 and the positioning step 23 cooperate to limit the depth to which the steam pipe 20 extends into the air inlet cavity 12.

[0062] Reference Figure 12In another embodiment, the steam pipe 20 includes a pipe body 21 having an inner diameter of 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 steam nozzle includes a nozzle body 10 having an open opening. The air inlet cavity 12 and the air jet flow channel 11 are both provided in the nozzle body 10, and the air inlet cavity 12 is connected to the open opening. The mounting head 22 is sleeved onto the outer circumferential surface of the nozzle body 10 at the open end through the connecting cavity 221. In this embodiment, a mounting head 22 is added to the end of the main body 21 of the steam pipe 20 to connect it to the nozzle body 10. The mounting head 22 is relatively thick, enabling a reliable connection with the nozzle body 10, which is also relatively thick. Furthermore, the open nozzle body 10 is also easy to manufacture. In this embodiment, the main body 21 and the mounting head 22 are optionally 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 are not limited to being integrally formed.

[0063] Optionally, a transition chamber 222 is further formed in the mounting head 22, one end of the transition chamber 222 is connected to the tube body 21, and the other end is connected to the connecting chamber 221. The cross-sectional area of ​​the transition chamber 222 is gradually expanded in the direction close to the connecting chamber 221, so that the steam flowing from the tube body 21 can diffuse to the air inlet chamber 12 through the transition chamber 222, that is, the steam can enter the air inlet chamber 12 more smoothly.

[0064] Optionally, the open end of the nozzle body 10 is detachably connected to the connecting cavity 221 of the mounting head 22 to facilitate repair or replacement of the jet structure in the event of blockage. Of course, the open end of the nozzle body 10 and the connecting cavity 221 of the mounting head 22 may also be connected, but not limited to, by a riveting structure or an adhesive structure. Further, optionally, the open end of the nozzle body 10 and the connecting cavity 221 of the mounting head 22 are detachably connected by a threaded pair. Specifically, the outer peripheral surface of the open end of the nozzle body 10 is provided with an external thread, and the side surface of the connecting cavity 221 of the mounting head 22 is provided with an internal thread, and the detachable connection is achieved through the cooperation of the external and internal 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 open end of the nozzle body 10 and the connecting cavity 221 of the mounting head 22. In addition, the open end of the nozzle body 10 and the connecting cavity 221 of the mounting head 22 may also be detachably connected, but not limited to, by a snap-fit ​​structure.

[0065] Reference Figure 13 In yet another embodiment, the steam nozzle 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 second sub-chamber 10b has an inner diameter equal to the second inner diameter. The air jet passages 11 are disposed within the second nozzle body 102. The inner diameter of the first sub-chamber 10a is a fourth inner diameter that is smaller than the second inner diameter. The second sub-chamber 10b communicates with the steam pipe 20 via the first sub-chamber 10a. This embodiment facilitates the processing and molding of the larger inner cavity by dividing the steam nozzle with a larger inner cavity into at least two connected portions.

[0066] Optionally, the inner diameter of the portion of the first sub-cavity 10a close to the second sub-cavity 10b is gradually increased in the direction close to the second sub-cavity 10b, so that the steam flowing from the steam pipe 20 can diffuse to the second sub-cavity 10b through the gradually expanding part of the first sub-cavity 10a, that is, the steam can enter the second sub-cavity 10b more smoothly.

[0067] Optionally, the first nozzle split 101 and the second nozzle split 102 are detachably connected. In this way, when either the first nozzle split 101 or the second nozzle split 102 needs to be replaced, only that one can be replaced without replacing both at the same time, and this is also beneficial for repairing blockages in the jet flow channel 11. Of course, the first nozzle split 101 and the second nozzle split 102 can also be connected, but not limited to, by a riveted structure or an adhesive structure. Further optionally, the first nozzle split 101 and the second nozzle split 102 are detachably connected by a threaded pair. 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 first nozzle split 101 and the second nozzle split 102. In addition, the first nozzle split 101 and the second nozzle split 102 can also be detachably connected, but not limited to, by a snap-on structure.

[0068] Optionally, the first nozzle body 101 is detachably connected to the steam pipe 20 to facilitate repair of blockage or replacement of the jet structure. Furthermore, the first nozzle body 101 is detachably connected to the steam pipe 20 via a threaded pair. In particular, the threaded pair structure 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. Furthermore, the first nozzle body 101 and the steam pipe 20 may also be detachably connected via, but not limited to, a snap-fit ​​structure.

[0069] The present invention also proposes a steam wand, which includes a steam pipe and a steam nozzle connected to each other. The specific structure of the steam nozzle refers to the above-mentioned embodiment. Since this steam wand adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0070] This utility model also provides a beverage device, comprising a water tank, a heating device disposed within the water tank, and a steam wand. The specific structure of the steam wand is similar to that of the aforementioned embodiments. Since this beverage device utilizes all of the technical solutions of all of the aforementioned embodiments, it possesses at least all of the beneficial effects provided by the technical solutions of the aforementioned embodiments, and therefore will not be further elaborated upon here. The steam wand is connected to the water tank via a steam pipe, and the heating device is used to heat the water within the water tank to generate steam. The generated steam is ejected through the steam pipe from the jet flow channel of the steam nozzle to perform a foaming operation. This beverage device can be a coffee machine or other device that requires foaming the surface of the beverage being produced.

[0071] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A steam nozzle for sending liquid bubbles, characterized in that: The steam nozzle is provided with an air inlet cavity, an air jet channel communicating with the air inlet cavity, and a flow guide convex portion facing the air inlet cavity. The air jet channel has an air jet inlet communicating with the air inlet cavity, and the air jet inlet is arranged on the periphery of the flow guide convex portion.

2. The steam nozzle according to claim 1, wherein: The cross-sectional area of ​​the flow-guiding protrusion is gradually reduced in the protruding direction.

3. The steam nozzle according to claim 2, characterized in that The flow-guiding protrusion is arranged in a cone shape, a partial spherical shape or a truncated cone shape.

4. The steam nozzle according to claim 1, wherein: A plurality of the jet flow channels are provided, and the plurality of the jet flow channels are spaced apart in a circumferential direction around the guide protrusion.

5. The steam nozzle according to claim 1, wherein: The flow-guiding protrusion is arranged on the bottom of the air inlet cavity, and the air jet inlet is arranged on the side surface or the bottom surface of the air inlet cavity.

6. The steam nozzle according to claim 1, wherein: The protrusion height of the flow-guiding protrusion is higher than the air injection inlet.

7. The steam nozzle according to any one of claims 1 to 6, characterized in that: The outlet of the jet flow channel away from the air inlet cavity is the jet outlet, and the jet flow channel is eccentrically arranged relative to the air inlet cavity at least at the jet outlet.

8. The steam nozzle according to claim 7, wherein: The air inlet cavity has a nozzle axis, the jet outlet has a jet centerline, and on a reference plane passing through the jet center point of the jet outlet and perpendicular to the nozzle axis, the distance from the projection point of the nozzle axis to the reverse extension line of the projection line of the jet centerline is greater than or equal to 3 mm; and / or The angle between the jet centerline and the reference plane is greater than or equal to 20° and less than or equal to 70°.

9. A steam wand for making beverages, characterized in that: The steam wand includes a steam pipe and the steam nozzle according to any one of claims 1 to 8, wherein the steam nozzle is further provided with an air inlet communicating with the air inlet cavity, and the steam pipe is provided at the air inlet.

10. A beverage device, characterized in that: It comprises a water tank, a heating device arranged in the water tank, and the steam rod according to claim 9, wherein the steam rod is connected to the water tank through the steam pipe.

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