Steam car wash nozzle and car wash robot

Abstract

The application provides a steam car washing nozzle and a car washing robot, and relates to the technical field of car washing equipment. The steam car washing nozzle comprises a gas inlet interface, a flow guide cavity, a flow guide structure and a plurality of spray holes. One end of the gas inlet interface is used for being communicated with a steam generating device, and the other end is communicated with the flow guide cavity, so that steam generated by the steam generating device is introduced into the flow guide cavity. The cross section of the flow guide cavity is larger than the cross section of the gas inlet interface. In the direction of steam flow, the cross section of the flow guide cavity gradually increases first and then gradually decreases. The first end of the spray hole is communicated with the flow guide cavity, and the second end of the spray hole is used as a steam outlet for car washing. The flow guide structure is arranged in the flow guide cavity and located at the first end of the spray hole. The nozzle is made of stainless steel, copper or aluminum alloy. The steam car washing nozzle and the car washing robot can reduce the turbulence during steam spraying and reduce noise.

Description

Technical Field

[0001] This application relates to the field of car washing equipment technology, and in particular to a steam car wash nozzle and a car wash robot. Background Technology

[0002] Steam car washing is a car cleaning technology based on high-temperature, high-pressure steam. Its core principle is to use the heat energy and pressure of high-temperature steam to efficiently remove dirt, oil stains, and dust from interior crevices. However, existing steam car wash nozzles, due to unreasonable design, easily cause violent turbulence during steam jetting, generating high-frequency noise. This noise can not only damage the hearing of operators but also potentially cause noise pollution to the surrounding environment. Utility Model Content

[0003] To address at least one of the problems mentioned in the background art, this application provides a steam car wash nozzle and a car wash robot that can reduce turbulence during steam jetting and lower noise.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] In a first aspect, this application provides a steam car wash nozzle, including an air inlet, a flow guiding cavity, a flow guiding structure, and multiple spray holes. One end of the air inlet is connected to a steam generating device, and the other end is connected to the flow guiding cavity to guide the steam generated by the steam generating device into the flow guiding cavity. The cross-section of the flow guiding cavity is larger than the cross-section of the air inlet. Along the direction of steam flow, the cross-section of the flow guiding cavity first gradually increases and then gradually decreases.

[0006] The first end of the spray hole is connected to the drainage chamber, and the second end of the spray hole serves as the air jet nozzle for car washing.

[0007] A flow guiding structure is provided in the flow guiding cavity and located at the first end of the injection hole, for guiding the steam in the flow guiding cavity into the injection hole;

[0008] The nozzles are made of stainless steel, copper, or aluminum alloy.

[0009] As an optional implementation, at least one wall of the drainage cavity is curved.

[0010] As an alternative implementation, the thickness of the drainage cavity gradually decreases along the direction of steam flow.

[0011] As an optional implementation, the flow guiding structure includes a plurality of spaced-apart protrusions, the sidewalls of two adjacent protrusions forming a flow guiding channel, and a flow guiding channel and a first end of an injection hole being connected accordingly. The flow guiding channel is used to guide the steam in the flow guiding chamber into the injection hole.

[0012] As an alternative implementation, the cross-section of the guide channel gradually decreases along the direction of steam flow.

[0013] As an optional implementation, a plurality of injection holes are spaced apart along the width direction of the nozzle, wherein the width direction is perpendicular to the axis of the injection holes.

[0014] As an optional implementation, the diameter of the injection hole is less than 1 mm.

[0015] As an optional implementation, it also includes multiple spoilers, which are spaced apart in the air intake cavity and located at the connection between the air intake and the air intake cavity.

[0016] As an optional implementation, a ceramic coating is also included, which covers the inner wall of the drainage cavity.

[0017] Secondly, this application also provides a car wash robot, including the steam car wash nozzle of the first aspect.

[0018] The steam car wash nozzle provided in this application includes an air inlet, a flow guiding chamber, a flow guiding structure, and multiple spray holes. One end of the air inlet is connected to a steam generating device, and the other end is connected to the flow guiding chamber to guide the steam generated by the steam generating device into the flow guiding chamber. The cross-section of the flow guiding chamber is larger than the cross-section of the air inlet, and the cross-section of the flow guiding chamber gradually increases and then gradually decreases along the direction of steam flow. The first end of the spray hole is connected to the flow guiding chamber, and the second end of the spray hole serves as the air jet outlet for the car wash nozzle. The flow guiding structure is disposed in the flow guiding chamber and located at the first end of the spray hole to guide the steam in the flow guiding chamber into the spray hole. The nozzle is made of stainless steel, copper, or aluminum alloy.

[0019] The steam car wash nozzle provided in this application guides steam generated by a steam generator into a flow chamber with a cross-section larger than the air inlet. The increased cross-sectional area of ​​the flow chamber reduces the steam velocity and ensures uniform pressure distribution, preventing severe impacts and turbulence caused by high-speed steam flow. Subsequently, a guide structure located in the flow chamber at the first end of the spray orifice guides the steam in the flow chamber into the spray orifice in an orderly manner, further guiding the steam to flow smoothly in a preset direction and preventing disorderly collisions within the chamber. Finally, the steam is dispersed and smoothly ejected through multiple spray orifices, significantly reducing turbulence during steam jetting and thus lowering noise. This effectively solves the problem of existing steam car wash nozzles causing severe steam jet turbulence, high-frequency noise, damage to operators' hearing, and noise pollution of the surrounding environment due to unreasonable design. Furthermore, the nozzle is made of stainless steel, copper, or ceramic-aluminum alloy, preventing damage from high-temperature steam and improving its durability and reliability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the steam car wash nozzle provided in the embodiments of this application;

[0022] Figure 2 This is a first cross-sectional schematic diagram of a steam car wash nozzle provided in an embodiment of this application;

[0023] Figure 3 This is a second cross-sectional schematic diagram of a steam car wash nozzle provided in an embodiment of this application;

[0024] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a third cross-sectional schematic diagram of the steam car wash nozzle provided in the embodiments of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100-nozzle;

[0028] 110 - Intake port;

[0029] 120 - Drainage cavity;

[0030] 130-Flow guiding structure;

[0031] 140 - Injection hole;

[0032] 150-flow channel;

[0033] 160 - Spoiler. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] In this application, the terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” “outer,” “vertical,” “horizontal,” “lateral,” and “longitudinal” indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0036] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0037] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0038] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0039] Existing steam car wash nozzles are poorly designed, which can easily lead to intense turbulence during steam jetting, generating high-frequency noise. This noise can not only damage the hearing of operators, but also cause noise pollution problems in the surrounding environment.

[0040] In view of this, this application provides a steam car wash nozzle, including an air inlet, a flow guiding chamber, a flow guiding structure, and multiple spray holes. One end of the air inlet is connected to a steam generating device, and the other end is connected to the flow guiding chamber. The cross-section of the flow guiding chamber is larger than that of the air inlet, and the cross-section of the flow guiding chamber gradually increases and then gradually decreases along the direction of steam flow. The first end of the spray hole is connected to the flow guiding chamber, and the second end of the spray hole serves as the air outlet for the car wash nozzle. The flow guiding structure is disposed in the flow guiding chamber and located at the first end of the spray hole. The nozzle is made of stainless steel, copper, or ceramic aluminum alloy. The steam car wash nozzle provided by this application guides the steam generated by the steam generating device into the flow guiding chamber, whose cross-section is larger than that of the air inlet, through the air inlet. Due to the increased cross-sectional area of ​​the flow guiding chamber, the steam flow velocity decreases and the pressure is evenly distributed after entering, avoiding the violent impact and turbulence caused by high-speed steam flow. Subsequently, the flow guiding structure located in the flow guiding chamber and at the first end of the spray hole guides the steam in the flow guiding chamber into the spray hole in an orderly manner, further guiding the steam to flow smoothly in a preset direction and preventing disorderly collisions of steam within the chamber. Ultimately, the steam is dispersed and ejected smoothly through multiple injection holes, significantly reducing turbulence during steam injection and thus lowering noise.

[0041] Figure 1 This is a schematic diagram of the overall structure of the steam car wash nozzle provided in the embodiments of this application; Figure 2 This is a first cross-sectional schematic diagram of a steam car wash nozzle provided in an embodiment of this application; Figure 3 This is a second cross-sectional schematic diagram of a steam car wash nozzle provided in an embodiment of this application; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a third cross-sectional schematic diagram of the steam car wash nozzle provided in the embodiments of this application.

[0042] You can refer to this. Figures 1 to 5 This application provides a steam car wash nozzle 100, including an air inlet 110, a flow guiding cavity 120, a flow guiding structure 130, and multiple spray holes 140. One end of the air inlet 110 is connected to a steam generating device, and the other end is connected to the flow guiding cavity 120 to guide the steam generated by the steam generating device into the flow guiding cavity 120. The cross-section of the flow guiding cavity 120 is larger than the cross-section of the air inlet 110. Along the direction of steam flow, the cross-section of the flow guiding cavity 120 can be gradually increased and then gradually decreased. The first end of the spray hole 140 is connected to the flow guiding cavity 120, and the second end of the spray hole 140 serves as the air jet of the nozzle 100 for car washing. The flow guiding structure 130 is disposed in the flow guiding cavity 120 and located at the first end of the spray hole 140 to guide the steam in the flow guiding cavity 120 into the spray hole 140. The nozzle 100 is made of stainless steel, copper, or aluminum alloy.

[0043] The steam car wash nozzle 100 provided in this application introduces steam generated by a steam generator into a guide cavity 120, whose cross-section is larger than that of the air inlet 110, through an air inlet 110. Due to the increased cross-sectional area of ​​the guide cavity 120, the steam flow velocity decreases and the pressure is evenly distributed upon entry, avoiding severe impact and turbulence caused by high-speed steam flow. Subsequently, a guide structure 130 located in the guide cavity 120 and at the first end of the spray hole 140 guides the steam in the guide cavity 120 into the spray hole 140 in an orderly manner, further guiding the steam to flow smoothly in a preset direction and preventing disorderly collisions within the cavity. Finally, the steam is dispersed and smoothly ejected through multiple spray holes 140, significantly reducing turbulence during steam injection and thus lowering noise. This effectively solves the problem of existing steam car wash nozzles 100 causing severe steam turbulence and high-frequency noise due to unreasonable design, which damages the hearing of operators and causes noise pollution to the surrounding environment. In addition, the nozzle 100 is made of stainless steel, copper or aluminum alloy to avoid damage from high-temperature steam, thus improving the durability and reliability of the nozzle 100.

[0044] The cross-sectional area of ​​the drainage cavity 120 is designed to gradually increase and then gradually decrease. This means that as steam enters this area from the inlet 110, the expanding space allows for rapid pressure reduction and deceleration. The initially high-speed steam flow gradually becomes more stable, significantly reducing turbulence caused by high speed and pressure, thus fundamentally lowering the source of noise. Conversely, as the steam continues to flow, the cross-sectional area of ​​the drainage cavity 120 gradually decreases. This design allows for a better transition to the relatively smaller injection hole 140. As the cross-sectional area shrinks, the steam is continuously concentrated, increasing the airflow concentration. This allows the steam to be ejected from the injection hole 140 at high speed and in a concentrated state, ensuring sufficient cleaning power while maintaining airflow stability and avoiding secondary turbulence and increased noise caused by an uneven transition. In addition, the flow guiding structure 130 set at the first end of the spray hole 140 can accurately guide the steam flow between different spray holes 140, effectively avoiding the turbulent collision of the airflow at this point, further ensuring that the steam is sprayed out in a stable and orderly state, further solving the technical problems of violent steam jet turbulence and high noise in the existing nozzle 100, while ensuring the cleaning effect during car washing.

[0045] The nozzle 100 is made of stainless steel, copper, or aluminum alloy. Stainless steel and aluminum alloy offer excellent corrosion resistance and high-temperature resistance, resisting moisture erosion under long-term steam exposure and withstanding temperature changes during steam transmission. They are less prone to deformation or aging, ensuring the structural stability of the nozzle 100. Copper has excellent thermal conductivity, quickly transferring steam heat and preventing structural damage from localized overheating. It also possesses a degree of ductility, facilitating the fabrication of precise spray holes 140 and flow guiding structures 130, meeting the fine-diameter machining requirements of the spray holes 140. Ceramic material boasts high hardness and wear resistance, resisting the erosion from high-speed steam jets and minor friction during operation. It also exhibits excellent chemical stability, not reacting with steam or the media in the cleaning environment, ensuring steam purity and operational safety. Furthermore, all three materials possess good structural density, preventing steam leakage during transmission and ensuring that steam energy is concentrated at the outlet of the spray holes 140. Combined with the precise orifice design, this maintains stable spray pressure and flow rate.

[0046] In the above embodiments, at least one wall of the guide cavity 120 can be curved. It is understood that a curved wall can provide continuous and smooth guidance for the steam flow, allowing the steam to transition naturally along the curved surface as it flows within the guide cavity 120. This avoids turbulence phenomena such as airflow separation and vortices caused by abrupt changes in the wall surface, further optimizing the smoothness of the steam flow. Secondly, the curved structure helps to distribute the steam pressure more evenly within the guide cavity 120, reducing local pressure abrupt changes and thus reducing airflow disturbances caused by uneven pressure. This helps to suppress turbulence at the pressure level, further reducing noise. Furthermore, the curved design better adapts to the overall structure of the guide cavity 120, which first increases in cross-section and then decreases. This allows for a smooth transition from the inlet port 110 to the injection hole 140 during the expansion and contraction of the steam diameter, improving the aerodynamic performance of the entire nozzle 100 structure.

[0047] In the above embodiment, the thickness of the guide cavity 120 can be gradually reduced along the direction of steam flow. It can be understood that the gradual reduction in the thickness of the guide cavity 120 can focus the steam. As the channel narrows, the steam is concentrated, making the steam flow more focused. This allows the steam to maintain higher energy and impact force when it reaches the nozzle, which is more effective in removing stains in applications requiring a certain spray force, such as steam car washing. Furthermore, this design can reduce energy loss during steam transmission. Due to the reasonable increase in steam velocity and the optimization of the flow state, the steam can more efficiently transfer its thermal and kinetic energy to the target location, reducing waste caused by energy dispersion and helping to reduce production costs. In addition, this design can also improve the flow stability of the steam to a certain extent. The gradually changing thickness of the guide cavity 120 provides a relatively smooth flow space for the steam, avoiding airflow turbulence caused by abrupt changes in the channel structure, thereby reducing noise generation and making the entire steam system operate more smoothly and quietly.

[0048] In the above embodiments, the flow guiding structure 130 may include multiple spaced-apart protrusions. The sidewalls of two adjacent protrusions form a flow guiding channel 150. Each flow guiding channel 150 is connected to the first end of an injection hole 140. The flow guiding channel 150 is used to guide the steam in the drainage chamber 120 into the injection hole 140. The flow guiding channel 150 formed by the multiple spaced-apart protrusions can precisely guide the steam in the drainage chamber 120. Each flow guiding channel 150 is connected to the first end of an injection hole 140, allowing the steam to enter the injection hole 140 in an orderly and direct manner. This avoids disorderly diffusion and collision of steam within the drainage chamber 120, effectively reducing turbulence and thus lowering noise. Secondly, this design allows the steam to be ejected more concentratedly from the injection hole 140. Because the steam is regulated by the flow guiding channel 150, it maintains good directionality and concentration when entering the injection hole 140, enhancing the force and effect of the injection. In practical applications such as steam car washing, it can remove stains more efficiently; in industrial heating scenarios, it can also allow steam to act more precisely on the target location, improving work efficiency. In addition, the spacing of the protruding ridges can also buffer and disperse the steam, making the pressure distribution of the steam more uniform when it enters the guide channel 150, further ensuring the consistency of the steam entering each spray hole 140, making the entire spraying process more stable and reliable.

[0049] In the above embodiment, the cross-section of the guide channel 150 can be gradually reduced along the direction of steam flow. The continuous reduction in cross-section along the steam flow direction allows the airflow within the guide cavity 120 to be more concentrated and directed towards the injection hole 140, ensuring that the steam is continuously gathered during its flow and reaches its destination accurately and efficiently. As the steam velocity increases during this process, according to fluid mechanics principles, this increased velocity enhances the steam injection force, thus enabling more effective stain removal and significantly improving cleaning efficiency in practical applications such as steam car washing. Simultaneously, the concentrated and stable steam injection ensures the consistency and stability of the injection effect. Furthermore, this design optimizes the steam flow state, avoiding airflow turbulence and unnecessary energy loss, making the entire steam injection system more efficient and stable in operation.

[0050] In the above embodiments, multiple injection holes 140 can be spaced apart along the width direction of the nozzle 100, wherein the width direction is perpendicular to the axis of the injection holes 140. The spaced arrangement of multiple injection holes 140 along the width direction of the nozzle 100 (perpendicular to the axis of the injection holes 140) has several technical advantages. On the one hand, this design enables the steam injection to form a uniform wide coverage area, covering a larger work surface without frequent movement of the nozzle 100, significantly improving work efficiency in applications such as car washing. On the other hand, the spaced arrangement avoids mutual interference and collision of steam airflow from adjacent injection holes 140. Combined with the guiding effect of the flow channel 150, this further ensures the stability of the airflow from each injection hole 140, ensuring a uniform and consistent injection effect. Furthermore, the wide-distributed injection holes 140, together with the flow channel 150 and the guide cavity 120, work synergistically, allowing the steam to maintain both concentration and uniform diffusion in the overall flow path. This ensures the impact force of each individual injection hole 140 while optimizing the overall work effect through wide coverage, enabling the steam to act more efficiently and accurately on the target surface.

[0051] In the above embodiment, the diameter of the injection hole 140 is less than 1 mm. It can be understood that the diameter range of the injection hole 140 can synergize with the gradually decreasing cross-section of the guide channel 150. Based on receiving the concentrated and guided steam flow, reasonable hole diameter control ensures that the steam maintains a suitable flow rate and pressure. This avoids the problems of steam dispersion and insufficient impact force caused by excessively large hole diameters, and also prevents airflow blockage or excessive energy consumption caused by excessively small hole diameters. Simultaneously, combined with the spaced arrangement of multiple injection holes 140 along the width direction of the nozzle 100, this hole diameter design allows the steam ejected from each injection hole 140 to form a uniform and sufficiently impactful airflow jet. While achieving wide coverage of the work surface, it ensures that each area achieves stable cleaning or effective cleaning, balancing work efficiency and quality, and adapting to the practical application needs of scenarios such as steam car washing.

[0052] In the above embodiments, multiple baffles 160 may be further included. These baffles 160 are spaced apart within the drainage cavity 120 and located at the connection between the air inlet 110 and the drainage cavity 120. The baffles 160 can initially regulate the steam entering from the air inlet 110, breaking the disordered turbulent flow. Steam entering from the air inlet 110 often carries an impact and turbulence. The baffles 160, through their spaced blocking and diversion effects, disperse the concentrated airflow into multiple stable airflows, preventing a single strong airflow from directly impacting the internal structure of the drainage cavity 120. The spaced arrangement allows the airflow to form a uniformly distributed flow field as it passes through the gaps between the baffles 160, laying a stable foundation for the subsequent flow in the drainage cavity 120 and reducing pressure fluctuations caused by initial airflow turbulence. Steam pre-treated by the baffles 160 has a more uniform flow state and can more efficiently respond to the pressure reduction and deceleration effect caused by changes in cross-sectional area after entering the drainage cavity 120, further reducing turbulent noise.

[0053] In the above embodiments, a ceramic coating may also be included, covering the inner wall of the drainage cavity 120. The ceramic coating can reduce surface frictional resistance, decrease energy loss during steam flow, and improve the output efficiency of the nozzle 100. The high-hardness coating significantly enhances the durability of the drainage cavity 120 under high temperature and high pressure environments, extending its service life. Furthermore, the microporous structure of the coating adsorbs impurities, reducing the probability of nozzle clogging and further ensuring the long-term stable operation of the nozzle 100. Specifically, the ceramic coating can be a zirconium oxide or silicon carbide nano-coating, achieving an ultra-smooth surface through plasma spraying or chemical vapor deposition processes. The coating thickness is 5μm-10μm, and the surface roughness Ra value is less than 0.1μm.

[0054] Furthermore, this application embodiment also provides a car wash robot, including the steam car wash nozzle 100 described in the above embodiment. The steam car wash nozzle 100 includes an air inlet 110, a flow guiding cavity 120, a flow guiding structure 130, and multiple spray holes 140. One end of the air inlet 110 is connected to a steam generating device, and the other end is connected to the flow guiding cavity 120. The cross-section of the flow guiding cavity 120 is larger than the cross-section of the air inlet 110. The first end of the spray hole 140 is connected to the flow guiding cavity 120, and the second end of the spray hole 140 serves as the air jet nozzle of the nozzle 100 for car washing. The flow guiding structure 130 is disposed in the flow guiding cavity 120 and located at the first end of the spray hole 140. During car washing, steam generated by the steam generating device is introduced into the flow guiding cavity 120, whose cross-section is larger than that of the air inlet 110, through the air inlet 110. Due to the increased cross-sectional area of ​​the flow guiding cavity 120, the steam velocity decreases and the pressure is evenly distributed after entering, avoiding the violent impact and turbulence caused by the high-speed flow of steam. Subsequently, the guide structure 130, located in the guide cavity 120 and at the first end of the injection hole 140, guides the steam in the guide cavity 120 into the injection hole 140 in an orderly manner, further guiding the steam to flow smoothly in a preset direction and preventing the steam from colliding disorderly within the cavity. Finally, the steam is dispersed and ejected smoothly through multiple injection holes 140, significantly reducing turbulence during steam injection and thus reducing noise.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A steam car wash nozzle, characterized in that, It includes an air inlet, a flow guiding cavity, a flow guiding structure, and multiple injection holes. One end of the air inlet is connected to a steam generating device, and the other end is connected to the flow guiding cavity to guide the steam generated by the steam generating device into the flow guiding cavity. The cross-section of the flow guiding cavity is larger than the cross-section of the air inlet. Along the direction of steam flow, the cross-section of the flow guiding cavity first gradually increases and then gradually decreases. The first end of the spray hole is connected to the drainage cavity, and the second end of the spray hole serves as the air outlet of the spray head for car washing. The flow guiding structure is disposed in the flow inlet cavity and located at the first end of the injection hole, for guiding the steam in the flow inlet cavity into the injection hole; The nozzle is made of stainless steel, copper, or aluminum alloy.

2. The steam car wash nozzle according to claim 1, characterized in that, At least one wall of the drainage cavity is curved.

3. The steam car wash nozzle according to claim 2, characterized in that, The thickness of the drainage cavity gradually decreases along the direction of the steam flow.

4. The steam car wash nozzle according to claim 3, characterized in that, The flow guiding structure includes a plurality of spaced protrusions, and the sidewalls of two adjacent protrusions form a flow guiding channel. One of the flow guiding channels and the first end of the injection hole are connected accordingly. The flow guiding channel is used to guide the steam in the flow guiding chamber into the injection hole.

5. The steam car wash nozzle according to claim 4, characterized in that, The cross-section of the guide channel gradually decreases along the direction of the steam flow.

6. The steam car wash nozzle according to any one of claims 1-5, characterized in that, The plurality of spray holes are spaced apart along the width direction of the nozzle, wherein the width direction is perpendicular to the axis of the spray holes.

7. The steam car wash nozzle according to any one of claims 1-5, characterized in that, The diameter of the injection hole is less than 1 mm.

8. The steam car wash nozzle according to any one of claims 1-5, characterized in that, It also includes multiple spoilers, which are spaced apart in the air intake cavity and located at the connection between the air intake and the air intake cavity.

9. The steam car wash nozzle according to any one of claims 1-5, characterized in that, It also includes a ceramic coating that covers the inner wall of the drainage cavity.

10. A car wash robot, characterized in that, Includes the steam car wash nozzle as described in any one of claims 1-9.

Images