Steam rod and beverage equipment

Abstract

The utility model discloses a steam rod and drink equipment, the steam rod is used for making drink, and the steam rod comprises a steam pipe used for being communicated with a steam generator; the spray head body is provided with an air inlet cavity, an air inlet communicated with the air inlet cavity and an air injection flow channel communicated with the air inlet cavity, the steam pipe is arranged at the air inlet, and at least part of the air injection flow channel extends along a curve. According to the technical scheme, the steam rod can generate eccentric steam jet flow, so that the steam jet flow can drive liquid to flow in a vortex shape, and the foaming effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of beverage equipment, in particular to 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 frothing is one of the most common methods for frothing milk in semi-automatic coffee machines, characterized by dense milk foam and easy operation. However, the steam nozzles in current steam wands typically extend radially, and the steam jet fails to create a vortex in the milk, making it difficult to produce dense, glossy milk foam. Utility Model Content

[0003] The main purpose of the utility model is to provide a steam wand, which is intended to facilitate driving liquid to achieve vortex flow and improve the foaming effect.

[0004] To achieve the above-mentioned purpose, the steam wand proposed in the present invention is used for making beverages and comprises:

[0005] a steam pipe for communicating with the steam generator; and

[0006] The nozzle body is provided with an air inlet cavity, an air inlet connected to the air inlet cavity, and an air jet flow channel connected to the air inlet cavity. The steam pipe is arranged at the air inlet, and at least a part of the air jet flow channel extends along a curve.

[0007] Optionally, the entire jet flow channel extends along a curve.

[0008] Optionally, in a direction away from the air inlet cavity, the curvature of the portion of the air jet flow channel extending along the curve gradually increases.

[0009] Optionally, the jet flow channel has a jet inlet communicated with the air inlet cavity, and a jet outlet away from the air inlet cavity, and the caliber of the jet outlet is larger than the caliber of the jet inlet.

[0010] Optionally, in the direction from the jet inlet to the jet outlet, the flow channel diameter of the jet flow channel is arranged to gradually increase.

[0011] 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 of the air inlet cavity.

[0012] 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.

[0013] Optionally, the air inlet cavity has a nozzle axis, the jet outlet has a jet center line, a plane passing through the jet center point of the jet outlet and perpendicular to the nozzle axis is a reference plane, and the jet center line is set at an angle β greater than zero with the reference plane.

[0014] Optionally, the β is greater than or equal to 20° and less than or equal to 70°.

[0015] The present invention further provides a beverage device, comprising a steam generator and the aforementioned steam wand, wherein the steam wand is connected to the steam generator through the steam pipe.

[0016] In the technical solution of the present invention, at least a portion of the steam wand's jet channel extends along a curve. This allows the steam wand to generate an eccentric steam jet, causing the steam to drive the liquid into a vortex-like flow. Therefore, when frothing, the steam wand need only be inserted into or near the center of the liquid to be frothed, and the jet outlet of the jet channel angled toward the bottom of the latte art bowl. This creates a vortex-like flow within the bowl, tumbling the liquid inward and outward, and achieving a good frothing effect. Furthermore, the fact that at least a portion of the jet channel extends along a curve also increases the eccentric angle of the steam jet. Thus, compared to using a jet channel extending along a straight line, the wall thickness of the steam wand's nozzle body can be thinner to achieve the same large eccentric angle, thereby reducing the outer diameter of the steam wand. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 This is a schematic top view of an application scenario of an embodiment of the steam wand of the present invention;

[0019] Figure 2 This is a side view schematic diagram of an application scenario of an embodiment of the steam wand of the present invention;

[0020] Figure 3 This is a schematic structural diagram of the steam wand according to the first embodiment of the present invention;

[0021] Figure 4 for Figure 3 Side view schematic diagram of the steam wand application scenario;

[0022] Figure 5 for Figure 3 A bottom view of the nozzle body of the steam wand;

[0023] Figure 6 A side view of the nozzle body of the second embodiment of the steam wand of the present invention;

[0024] Figure 7 for Figure 6 A bottom view of the middle nozzle body;

[0025] Figure 8 This is a bottom view of the nozzle body of the third embodiment of the steam wand of the present invention;

[0026] Figure 9 A partial side view of a nozzle body of a fourth embodiment of the steam wand of the present invention;

[0027] Figure 10 A partial side view of a nozzle body of a fifth embodiment of the steam wand of the present invention;

[0028] Figure 11 This is an exploded diagram of the nozzle body and the steam pipe of the sixth embodiment of the utility model;

[0029] Figure 12 This is a schematic diagram of the assembly of the nozzle body and the steam pipe of the seventh embodiment of the present utility model;

[0030] Figure 13 This is a schematic diagram of the assembly of the nozzle body and the steam pipe of the eighth embodiment of the present utility model;

[0031] Figure 14 This is a schematic diagram of the assembly of the nozzle body and the steam pipe of the ninth embodiment of the present invention;

[0032] Figure 15 Schematic diagram of the assembly of the nozzle body and the steam pipe according to the tenth embodiment of the present invention.

[0033] Description of Figure Numbers:

[0034] 10. Nozzle body; 11. Jet flow channel; 11c. Auxiliary jet flow channel; 111. Jet outlet; 12. Air inlet chamber; 121. Air inlet hole; 122. Guide convex portion; 13. Nozzle hole; 14. Extension tube; 15. Positioning sink; 10a. First sub-chamber; 10b. Second sub-chamber; 101. First nozzle split; 102. Second nozzle split; 20. Steam pipe; 21. Pipe body; 22. Mounting head; 221. Connecting chamber; 222. Transition chamber; 23. Positioning step; 20a. First channel; 20b. Second channel; 201. Inner tube; 202. Outer tube; 30. Temperature sensor; 31. Temperature sensing portion; 32. Wire; 41. First sealing member; 42. Second sealing member; 421. Positioning convex portion

[0035] 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

[0036] 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.

[0037] 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.

[0038] 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 ability of ordinary technicians in this field to implement. 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.

[0039] The utility model provides a steam wand.

[0040] Reference Figures 1 to 5 In one embodiment of the present invention, the steam wand is used to make beverages and comprises:

[0041] a steam pipe 20 for communicating with the steam generator; and

[0042] The nozzle body 10 is provided with an air inlet cavity 12, an air inlet 121 communicating with the air inlet cavity 12, and an air jet flow channel 11 communicating with the air inlet cavity 12. The steam pipe 20 is provided at the air inlet 121. At least a portion of the air jet flow channel 11 extends along a curve.

[0043] In the technical solution of the present invention, at least a portion of the steam wand's jet channel 11 extends along a curve. This allows the steam wand to generate an eccentric steam jet, thereby causing the steam to drive the liquid into a vortex-like flow. Therefore, when frothing, the steam wand need only be inserted into or near the center of the liquid to be frothed, and the jet outlet 111 of the jet channel 11 tilted toward the bottom of the latte art cup. This creates a vortex-like flow within the latte art cup, tumbling the liquid inward and outward, and achieving a good frothing effect. Furthermore, the fact that at least a portion of the jet channel 11 extends along a curve also helps increase the eccentric angle of the steam jet. Thus, compared to using a jet channel extending along a straight line, to achieve the same large eccentric angle, the wall thickness of the steam wand's nozzle body 10 can be thinner, thereby reducing the outer diameter of the steam wand.

[0044] In this embodiment, specifically, the air inlet cavity 12 has a nozzle axis, and the jet outlet 111 has a jet centerline. At least a portion of the jet flow channel 11 extends along a curve such that, on a reference plane passing through the jet center point of the jet outlet 111 and perpendicular to the nozzle axis, a line connecting the projection point of the nozzle axis and the jet center point forms an angle α greater than zero with the jet centerline or its projection line. This allows the steam ejected from the jet outlet 111 to have a tangential component to a circle centered about the projection point of the nozzle axis. This tangential component enables the steam to drive the liquid to achieve vortex-like flow.

[0045] 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 wand, 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 wand 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.

[0046] 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 nozzle body 10 is good. Furthermore, L is ≥ 3 mm to further increase the lower limit of the vortex effect that can be generated by the nozzle body 10.

[0047] 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 nozzle body 10 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 nozzle body 10. When the angle α is constant, the larger the outer diameter of the nozzle body 10, the larger the L, and the better the vortex effect of the steam on the liquid. However, the larger the outer diameter of the nozzle body 10, the higher the material cost required for the nozzle body 10, and it may not be suitable for smaller lace cylinders. In order to take into account 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 nozzle body 10) can be selected from 10mm to 30mm.

[0048] 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 wand 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 frothing effect of the liquid.

[0049] 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°.

[0050] Furthermore, the jet outlets 111 are provided in plurality, and the plurality of jet outlets 111 are spaced apart in the circumferential direction around the axis of the nozzle. In this way, a vortex of better quality can be formed more efficiently in the drawing cylinder, and a negative pressure cavity of a larger range for entraining air can be achieved, ultimately forming finer bubbles. In addition, the provision of multiple jet outlets 111 can also make the horizontal components of the reverse thrust of the steam jets ejected by the jet outlets 111 at various positions offset or nearly offset each other, so that the user basically does not need to consider the impact of the horizontal displacement of the steam wand on the drawing process. Of course, in the present invention, only one jet outlet 111 can also be provided. In this case, during the drawing operation, additional force is required to limit the translation of the steam wand. This additional force can be applied by the user, or by fixing the steam wand in one place and providing this additional force through a fixed structure. The user only needs to hold the drawing cylinder to cooperate with the steam wand. 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.

[0051] 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.

[0052] Reference Figure 5 Furthermore, in the direction away from the axis of the nozzle, 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.

[0053] Optionally, the entire jet flow channel 11 extends along a curve (eg Figure 5 ), so that it is more conducive to obtaining a larger eccentric angle and more conducive to reducing the wall thickness of the nozzle body 10. 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.

[0054] Reference Figure 5 In this embodiment, the flow channel opening connecting the jet channel 11 and the air inlet chamber 12 serves as the jet inlet. Furthermore, the jet outlet 111 has a larger diameter than the jet inlet. This larger outlet size increases the outlet flow rate of the nozzle under the same pressure, thereby increasing the flow rate of the steam jet and improving the foaming effect. Furthermore, the larger outlet size also reduces the risk of clogging of the jet channel 11.

[0055] Optionally, the flow path diameter of the jet flow channel 11 is gradually increased in the direction from the jet inlet to the jet outlet 111, so that the steam jet flows more smoothly in the jet flow channel 11, the steam jet kinetic energy coming out of the jet outlet 111 is stronger, and the foaming effect is better.

[0056] In the present invention, the nozzle body 10 is provided with a spray hole 13 , and the jet flow channel 11 includes a channel of the spray hole 13 .

[0057] 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 5 ), 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.

[0058] However, the present invention is not limited thereto. In another embodiment, referring to Figures 6 to 8 , the steam wand 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 further 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 may be set to extend along a curve (such as Figure 8 ), it is also possible to set at least a portion of the extension pipe 14 to extend along a curve (such as Figure 7 ), 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.

[0059] Further, refer to Figure 9 The inner cavity surface of the air inlet cavity 12 includes a cavity bottom surface located at the end of the first direction, and the cavity bottom surface is provided with a guide protrusion 122, and the cross-sectional area of ​​the guide protrusion 122 is gradually increased in the first direction. The jet flow channel 11 has an inner flow channel opening connected to the air inlet cavity 12, and the inner flow channel opening is arranged close to the guide protrusion 122; in this way, the steam entering the air inlet cavity 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, so that the airflow in the nozzle body 10 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.

[0060] Reference Figure 9In 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.

[0061] 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.

[0062] Optionally, the inner cavity surface of the air inlet cavity 12 also includes a cavity side surface adjacent to the cavity bottom surface, and the inner flow channel opening is arranged on the cavity side surface close to the cavity bottom surface, so that the jet flow channel 11 extends outward toward the side of the nozzle body 10, thereby making the airflow toward the peripheral side of the nozzle body 10 flow more smoothly, which is more conducive to the formation of a vortex effect.

[0063] Further, refer to Figure 10 The nozzle body 10 is also provided with an auxiliary jet flow channel 11c connected to the air inlet chamber 12, and the auxiliary jet flow channel 11c extends along the first direction. In this way, when the steam rod is vertically extended into the cup body of the drawing cylinder, a jet steam can be formed vertically at the bottom of the cup of the drawing cylinder through the auxiliary jet flow channel 11c, thereby enhancing the disturbance effect of the vortex center or near the vortex center of the liquid to be foamed, so as to improve the efficiency of bubble formation.

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

[0065] Furthermore, when the first direction is vertically downward, the auxiliary jet flow channel 11c is connected to the lowest point of the air inlet cavity 12, so that the auxiliary jet flow channel 11c can also facilitate the drainage of residual water in the air inlet cavity 12, thereby reducing the probability of bacterial growth in the air inlet cavity 12. Optionally, the auxiliary jet flow channel 11c has an inner channel opening connected to the air inlet cavity 12, and when the first direction is vertically downward, the inner surface of the air inlet cavity 12 is gradually inclined downward toward the inner channel opening, so as to further facilitate the flow of residual water to the auxiliary jet flow channel 11c, thereby more conveniently draining the residual water.

[0066] For the embodiment in which the air inlet cavity 12 is provided, without loss of generality, the air inlet cavity 12 of the nozzle body 10 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 nozzle axis 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.

[0067] Reference Figure 11 In one embodiment, the steam wand 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 the opening 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. Thus, the structure of the nozzle body 10 is relatively simple and easy to manufacture.

[0068] 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.

[0069] 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.

[0070] Reference Figure 12 In 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 wand 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 open end of the nozzle body 10 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.

[0071] 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, and 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.

[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 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.

[0073] Reference Figure 13 In yet another embodiment, the nozzle body 10 includes a first nozzle body 101 and a second nozzle body 102 connected to each other. The air inlet chamber 12 includes a first sub-chamber 10a provided within the first nozzle body 101 and a second sub-chamber 10b provided 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 provided 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 nozzle body 10 with a larger inner cavity into at least two connected portions.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] Reference Figure 14 and Figure 15 In one embodiment, further, a temperature sensor 30 is installed on the nozzle body 10 to detect the temperature of the liquid in the latte art cylinder through the temperature sensor 30. The temperature sensor 30 includes a temperature sensing portion 31 and a wire 32 connected to the temperature sensing portion 31. The wire 32 is sequentially passed through the steam pipe 20 and the air inlet cavity 12, and the temperature sensing portion 31 is sealed and passes through the cavity wall of the air inlet cavity 12. In this embodiment, by adding the temperature sensor 30, the temperature measurement function of the steam wand for the liquid can be increased, so that the temperature of the beverage can be obtained while achieving latte art, thereby enriching the function of the steam wand. In addition, by passing the wire 32 of the temperature sensor 30 through the steam pipe 20, the wire 32 of the temperature sensor 30 can be prevented from being exposed, thereby preventing the user from making latte art.

[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 cavity 12, and the second channel 20b is isolated from the air inlet cavity 12. The wire 32 is passed through the second channel 20b. In this way, the mutual influence between the steam and the wire 32 can be avoided. It can be understood that the high steam temperature can easily accelerate the aging of the insulation layer of the wire 32. At the same time, the wire 32 is also easy to harbor dirt or precipitate odor at high temperature, which affects the cleanliness of the steam.

[0079] Reference Figure 14 In one embodiment, the steam pipe 20 includes an inner tube 201 and an outer tube 202 sleeved on the outside of the inner tube 201. The first channel 20a is formed between the outer tube 202 and the inner tube 201. The second channel 20b is the inner pipe of the inner tube 201, that is, the wire 32 is passed through the inner tube 201. The steam enters the air inlet cavity 12 through the space between the outer tube 202 and the inner tube 201. In this way, the mutual influence between the steam and the wire 32 can be avoided.

[0080] Optionally, a temperature sensing mounting hole is provided in the cavity wall of the air inlet cavity 12, and the temperature sensing part 31 is passed through and installed in the temperature sensing mounting hole. A first sealing member 41 is provided between the end of the inner tube 201 close to the temperature sensing part 31 and the temperature sensing mounting hole. In this way, the first sealing member 41 not only blocks the gap between the temperature sensing part 31 and the temperature sensing mounting hole, but also isolates the inner tube 201 from the air inlet cavity 12, thereby realizing one sealing member blocking two positions, which can simplify the structure of the product.

[0081] Reference Figure 15 In another embodiment, the steam pipe 20 includes an inner tube 201 and an outer tube 202 sheathed outside the inner tube 201. The first channel 20a is an inner conduit of the inner tube 201, and the second channel 20b is formed between the outer tube 202 and the inner tube 201. Specifically, the wire 32 passes through the space between the outer tube 202 and the inner tube 201, and steam enters the air inlet chamber 12 through the inner tube 201. This prevents interaction between the steam and the wire 32. Specifically, high-temperature steam flows only through the inner tube 201, that is, no high-temperature steam flows into the space between the outer tube 202 and the inner tube 201. Therefore, the temperature of the outer tube 202 is hardly affected by the high-temperature steam, thereby maintaining a relatively low temperature. Thus, even if the outer tube 202 is not provided with a thermal insulation structure, it will not cause burns to the user, thereby simplifying the overall structure of the product.

[0082] Optionally, a temperature sensing mounting hole is formed in the wall of the air inlet cavity 12, and the temperature sensing portion 31 is installed in the temperature sensing mounting hole. The nozzle body 10 is further provided with an air inlet hole 121 communicating with the air inlet cavity 12, and the outer tube 202 is connected to the air inlet hole 121. A second sealing member 42 is further provided in the air inlet cavity 12, wherein a first end of the second sealing member 42 seals the air inlet hole 121, and a second end seals the temperature sensing mounting hole. The inner tube 201 penetrates the second sealing member 42 from the end surface of the first end and exits from the circumference of the second sealing member 42 to communicate with the air inlet cavity 12. The wire 32 penetrates the second sealing member 42 from the end surface of the second end and exits from the end surface of the first end to 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 inlet cavity 12, so that one seal blocks two positions, which can simplify the structure of the product.

[0083] Optionally, the inner tube 201 includes a first inner tube section 201 extending from the end face of the first end into the second sealing member 42, and a second inner tube section 201 passing through the circumferential surface of the second sealing member 42. The first inner tube section 201 is connected to the second inner tube section 201, and the angle between the first inner tube section 201 and the second inner tube section 201 is an obtuse angle. In this way, steam can enter the air inlet cavity 12 more smoothly, 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.

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

[0085] It is worth mentioning that in this embodiment, the nozzle body 10 can optionally adopt a structure including a first nozzle body 101 and a second nozzle body 102 that are detachably connected. The air inlet cavity 12 is formed between the first nozzle body 101 and the second nozzle body 102. The air inlet hole 121 is provided in the first nozzle body 101, and the temperature sensing installation hole is provided in the second nozzle body 102 to facilitate the installation of the second sealing member 42. Typically, the air injection channel 11 is provided in the second nozzle body 102.

[0086] This utility model also provides a beverage device comprising a steam generator and a steam wand. The specific structure of the steam wand is similar to the above-mentioned embodiments. Since this beverage device utilizes all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, and a detailed description thereof will not be repeated here. The steam wand is connected to the steam generator via a steam pipe. The steam generator is used to generate steam. The generated steam is ejected from the jet flow channel of the nozzle body through the steam pipe to perform a latte art operation. This beverage device can be a coffee machine or other device that requires a foaming operation on the surface of the beverage being produced.

[0087] 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 wand for making beverages, characterized in that: The steam wand comprises: a steam pipe for communicating with the steam generator; and The nozzle body is provided with an air inlet cavity, an air inlet connected to the air inlet cavity, and an air jet flow channel connected to the air inlet cavity. The steam pipe is arranged at the air inlet, and at least a part of the air jet flow channel extends along a curve.

2. The steam wand according to claim 1, wherein The entire jet flow channel extends along a curve.

3. The steam wand according to claim 1, wherein: In a direction away from the air inlet cavity, the curvature of the portion of the air jet flow channel extending along the curve gradually increases.

4. The steam wand according to claim 1, wherein: The jet flow channel has a jet inlet communicated with the air inlet cavity and a jet outlet away from the air inlet cavity, and the diameter of the jet outlet is larger than the diameter of the jet inlet.

5. The steam wand according to claim 4, wherein: In the direction from the jet inlet to the jet outlet, the flow channel diameter of the jet flow channel is gradually increased.

6. The steam wand according to claim 1, wherein: There are a plurality of jet flow channels, and the plurality of jet flow channels are spaced apart in the circumferential direction of the air inlet cavity.

7. The steam wand according to any one of claims 1 to 6, characterized in that 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.

8. The steam wand according to any one of claims 1 to 6, wherein: The air inlet cavity has a nozzle axis, the jet outlet has a jet center line, a plane passing through the jet center point of the jet outlet and perpendicular to the nozzle axis is a reference plane, and the jet center line is set at an angle β greater than zero with the reference plane.

9. The steam wand according to claim 8, wherein: The β is greater than or equal to 20° and less than or equal to 70°.

10. A beverage device, characterized in that: The invention comprises a steam generator and the steam wand according to any one of claims 1 to 9, wherein the steam wand is connected to the steam generator through the steam pipe.

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