Defrosting air outlet device and vehicle

Abstract

The invention relates to the technical field of automobile heating ventilation air conditioners, in particular to a defrosting air outlet device and a vehicle, the defrosting air outlet device comprises an air outlet body and an air outlet elbow, the air outlet body is arranged on an instrument desk of the vehicle and comprises a first air duct, and one end of the first air duct is connected with a defrosting air duct of the vehicle; the air outlet elbow is connected with the end, away from the defrosting air duct, of the air outlet body and provided with a bent air duct communicating with the first air duct, and the bent air duct is used for changing the airflow direction so as to reduce the included angle between the airflow and the front windshield of the vehicle when the airflow is ejected. According to the defrosting air outlet device, the included angle between airflow and the front windshield can be effectively reduced, the air pressure loss is reduced, and the defrosting efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of automotive HVAC technology, and in particular to a defrosting air outlet device and a vehicle. Background Art

[0002] With the rapid development of the automotive industry and the increasing demand for driving safety, the vehicle defrost system, as a crucial component of ensuring driving safety, has a direct impact on the driver's visual clarity and driving safety. Particularly in harsh winter conditions such as low temperatures, rain, and snow, the windshield is prone to fogging, frost, and even ice, severely impacting the driver's vision and posing a significant risk to traffic accidents.

[0003] Currently, automotive defrost systems primarily utilize heated air generated by the HVAC system to defrost the vehicle. This heated air is delivered from the defrost duct to the defrost outlet located on the dashboard, where it is directed toward the windshield. This heat transfer melts or evaporates the frost on the windshield, restoring a clear field of vision for the driver. However, existing defrost outlet systems suffer from numerous technical deficiencies in practical applications, severely impacting both defrosting effectiveness and user experience.

[0004] Traditional defrost air outlet devices usually adopt a direct air outlet design, that is, hot air is directly ejected from the air outlet set on the dashboard. Due to the geometric relationship between the position of the dashboard and the windshield, this direct air outlet design results in an excessively large angle between the airflow and the windshield surface, usually reaching 70°-90° or even larger. When the airflow hits the windshield at an excessively large angle, it will produce a strong airflow impact and a large wind pressure, which will not only cause energy loss, but may also generate noise and affect the comfort of the vehicle. More importantly, the excessively large impact angle makes the airflow on the glass surface not smooth enough, the heat transfer efficiency is low, and the defrosting effect is poor.

[0005] For example, one existing defrost device uses a direct, vertically upward airflow system, directing hot air vertically from the dashboard toward the windshield. Because the windshields of most vehicle models are tilted 25-35 degrees relative to the horizontal, the vertical airflow forms a sharp angle of 55-65 degrees with the inclined glass surface. This sharp angle causes the airflow to strongly reflect and swirl upon impact with the glass, increasing the system's pressure loss and reducing heat exchange efficiency. This design results in a 30-50% higher pressure loss than the optimized design, and the defrost time is correspondingly prolonged.

[0006] Another existing technology attempts to improve the impact angle by adjusting the fixed tilt angle of the air outlet. However, due to the installation space and structural constraints of the dashboard, this fixed angle adjustment range is limited and still cannot fundamentally solve the problem of excessive airflow angle. Furthermore, the fixed-angle design has the drawback of poor adaptability and cannot adapt to the different windshield angles of different models. This requires automakers to develop separate defrost devices for different models, increasing development costs and production complexity.

[0007] Fluid mechanics research shows that when the angle between the airflow and the solid surface is within the range of 15°-45°, good wall-adhering flow is achieved, ensuring sufficient heat exchange while avoiding excessive impact losses. For defrosting applications, the ideal angle between the airflow and the windshield should be controlled between 20°-40°, ensuring effective heat transfer while reducing wind pressure loss and noise generation. However, due to the geometric constraints of the instrument panel installation location, traditional straight-out designs have difficulty achieving this small airflow angle. Summary of the Invention

[0008] The present application provides a defrost air outlet device and a vehicle, wherein the defrost air outlet device can effectively reduce the angle between the airflow and the windshield, reduce wind pressure loss, and improve defrost efficiency.

[0009] In the first aspect, the present application provides a defrost air outlet device, comprising: an air outlet body, which is arranged on the dashboard of a vehicle, the air outlet body including a first air duct, one end of the first air duct being connected to the defrost air duct of the vehicle; an air outlet elbow, which is connected to the end of the air outlet body away from the defrost air duct, the air outlet elbow having a curved air duct connected to the first air duct, and the curved air duct is used to change the direction of the airflow to reduce the angle between the airflow and the front windshield of the vehicle when it is ejected.

[0010] In one possible implementation, a first joint is provided at one end of the air outlet body away from the defrost air duct, and the air outlet elbow includes: a second joint connected to the first joint; a curved air duct connected to the second joint, and a curved air duct is formed inside the curved air duct.

[0011] In a possible implementation, an air guide plate is provided in the curved air duct, and the air guide plate divides the curved air duct into a plurality of parallel air flow channels.

[0012] In a possible implementation, the first joint is arranged to be tilted upward relative to the installation surface of the air outlet body, and the tilt angle is 5°-45°.

[0013] In a possible implementation, the first connector and the second connector are detachably connected.

[0014] In a possible implementation, the first connector is inserted into the second connector and connected to the second connector via a fastener.

[0015] In a possible implementation, the fastener includes a buckle and a slot that fit together in a snap-fit ​​manner, one of the buckle and the slot is provided on the first joint, and the other is provided on the second joint.

[0016] In a possible implementation, a sealing ring is further included, and the sealing ring is arranged at the connection between the first joint and the second joint.

[0017] In a possible implementation, the central angle of the curved air duct is 15°-90°.

[0018] In a possible implementation, the air outlet elbow includes an adjustment structure for adjusting the center angle of the curved air duct.

[0019] In a second aspect, an embodiment of the present application provides a vehicle, comprising: a dashboard; the above-mentioned defrost air outlet device, which is arranged on the dashboard.

[0020] In a possible implementation, a plurality of defrost air outlet devices are included, and the plurality of defrost air outlet devices are arranged at intervals along the length direction of the instrument panel.

[0021] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0022] The defrost air outlet device provided in the embodiment of the present application is configured to connect the air outlet body with the defrost air duct by providing an air outlet elbow connected to the air outlet body, and forming a curved air duct connected to the first air duct in the air outlet elbow. This effectively solves the technical problems in the prior art of large wind pressure loss and low defrosting efficiency caused by excessively large angles between the airflow and the windshield, and achieves significant beneficial effects.

[0023] Specifically, the curved duct, through its unique curved geometry, effectively redirects the airflow entering from the first duct. When hot air enters the first duct from the horizontal or near-horizontal defrost duct, it undergoes a change of direction within the curved duct, transforming the originally vertical or near-vertical airflow directed toward the windshield into an inclined flow approaching the windshield at a shallow angle. This change in airflow direction is based on the principle of flow guidance in fluid mechanics. By guiding the airflow through the curved wall, a smooth transition in airflow direction is achieved, avoiding the flow separation and vortices that could result from a sharp turn.

[0024] After being redirected through the curved duct, the angle between the airflow and the windshield is significantly reduced, from the traditional design's wide angle of 70°-90° to a more reasonable range of 20°-40°. This reduced angle brings multiple benefits: First, the smaller angle allows the airflow to flow closer to the windshield surface, creating a favorable wall-sticking effect, increasing the contact time and area between the airflow and the glass surface, thereby improving heat exchange efficiency; second, the reduced impact angle significantly reduces the wind pressure loss caused by the airflow hitting the glass surface, reducing energy waste and achieving a greater effective air volume with the same fan power; third, the gentle airflow impact reduces turbulence and noise, improving the system's acoustic performance and passenger comfort.

[0025] From a defrosting perspective, the optimized airflow angle more effectively penetrates and flushes the frost layer on the windshield surface, accelerating the melting and evaporation of frost mist. Compared to traditional vertical impact methods, the curved air duct design of the present invention shortens defrosting time and improves defrosting uniformity, especially at the edges of the windshield, where the improvement in defrosting effect is more pronounced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0027] 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0029] Figure 1 A schematic structural diagram of a defrost air outlet device provided in an embodiment of the present application;

[0030] Figure 2 A schematic structural diagram of a defrost air outlet device, an instrument panel, and a front windshield provided in an embodiment of the present application;

[0031] Figure 3 A schematic diagram of the explosion structure of a defrost air outlet device provided in an embodiment of the present application;

[0032] Figure 4 for Figure 3Schematic diagram of the cross-section structure along the AA direction;

[0033] Figure 5 for Figure 3 Schematic diagram of the cross-section structure along the BB direction;

[0034] Figure 6 for Figure 3 Schematic diagram of the cross-sectional structure along CC direction;

[0035] Figure 7 This is a simulation diagram comparing the defrosting effect within the specified time;

[0036] Figure 8 This is a simulation diagram of aerodynamic noise comparison within a specified time.

[0037] Description of reference numerals:

[0038] 1. Air outlet body; 11. First air duct; 12. First connector; 13. Buckle; 14. Mounting platform;

[0039] 2. Instrument panel;

[0040] 3. Air outlet elbow; 31. Curved air duct; 32. Second joint; 33. Curved air duct; 34. Air guide vane; 35. Slot;

[0041] 4. Windshield;

[0042] 5. Sealing ring; 6. Screws. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0044] The disclosure below provides many different embodiments or examples for implementing different configurations of the present invention. To simplify the disclosure of the present invention, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed.

[0045] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or a change in motion, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will subsequently be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0046] like Figures 1-8 As shown, an embodiment of the present application provides a defrost air outlet device, including: an air outlet body 1, which is arranged on the dashboard 2 of the vehicle, the air outlet body 1 includes a first air duct 11, and one end of the first air duct 11 is connected to the defrost air duct of the vehicle; an air outlet elbow 3, which is connected to the end of the air outlet body 1 away from the defrost air duct, and the air outlet elbow 3 has a curved air duct 31 connected to the first air duct 11, and the curved air duct 31 is used to change the direction of the airflow to reduce the angle between the airflow and the vehicle windshield 4 when it is ejected.

[0047] In the present invention, on the basis of connecting the air outlet body 1 with the defrost air duct, an air outlet elbow 3 connected to the air outlet body 1 is provided, and a curved air duct 31 connected to the first air duct 11 is formed in the air outlet elbow 3, which effectively solves the technical problems in the prior art of large wind pressure loss and low defrosting efficiency caused by the excessively large angle between the airflow and the windshield 4, and achieves significant beneficial effects.

[0048] Specifically, the curved duct 31, through its unique curved geometry, effectively redirects the airflow entering from the first duct 11. When hot air enters the first duct 11 from the horizontal or near-horizontal defrost duct, it undergoes a change of direction within the curved duct 31, transforming the airflow, originally directed perpendicularly or nearly perpendicularly toward the windshield 4, into an inclined flow approaching the windshield 4 at a shallow angle. This change in airflow direction is based on the principle of flow guidance in fluid mechanics. By guiding the airflow through the curved wall, a smooth transition in airflow direction is achieved, avoiding the flow separation and vortices that could result from a sharp turn.

[0049] After being redirected through the curved air duct 31, the angle between the airflow and the windshield 4 is significantly reduced, from the traditional design's wide angle of 70°-90° to a reasonable range of 20°-40°. This reduced angle brings multiple beneficial effects: First, the smaller angle allows the airflow to flow closer to the surface of the windshield 4, creating a favorable wall-sticking effect, increasing the contact time and area between the airflow and the glass surface, thereby improving heat exchange efficiency; second, the reduced impact angle significantly reduces the wind pressure loss caused by the airflow hitting the glass surface, reducing energy waste and achieving a greater effective air volume with the same fan power; third, the gentle airflow impact reduces turbulence and noise, improving the system's acoustic performance and passenger comfort.

[0050] From the perspective of defrosting effectiveness, the optimized airflow angle can more effectively penetrate and flush the frost layer on the surface of the windshield 4, accelerating the melting and evaporation of frost mist. Compared with the traditional vertical impact method, the curved air duct 31 design of the present invention can effectively shorten the defrosting time and significantly improve the uniformity of defrosting. The improvement in defrosting effect is particularly evident at the edge areas of the windshield 4.

[0051] From the perspective of system energy consumption, the reduction in wind pressure loss directly reduces the fan workload, significantly reducing system energy consumption while achieving the same defrosting effect. This reduction in energy consumption not only improves fuel economy but also directly extends the range of electric vehicles, thus having important practical value.

[0052] Specifically, the air outlet body 1 is arranged on the dashboard 2 of the vehicle, and one end of its first air duct 11 is connected to the defrost air duct of the vehicle, ensuring the continuity of the airflow of the defrost system. The air outlet elbow 3 is connected to the end of the air outlet body 1 away from the defrost air duct. This connection method ensures that the airflow can smoothly enter the curved air duct 31 after passing through the first air duct 11 from the defrost air duct. The curved air duct 31 is connected to the first air duct 11 to form a complete airflow channel. When the defrost system is working, the hot air enters the first air duct 11 from the defrost air duct, then flows through the curved air duct 31, changes direction inside the curved air duct 31, and finally is emitted at an optimized angle, directly acting on the frosted area of ​​the windshield 4.

[0053] In a specific embodiment, when a vehicle is started in a low-temperature environment in winter, a layer of frost often forms on the surface of the windshield 4, seriously affecting the driver's vision. The traditional horizontal air outlet method has a limited defrosting effect due to the small angle between the airflow and the glass surface, and it takes a long time to clear the frost. After adopting the defrost air outlet device of the present invention, the curved air duct 31 turns the horizontal airflow into an upward-inclined airflow. The airflow at this inclined angle can more effectively impact the frost on the glass surface and improve the heat exchange efficiency. Under the same defrosting power, the defrosting time of the present invention is significantly shorter than that of the traditional solution, which greatly improves the defrosting efficiency.

[0054] Conventional defrost vents typically use a direct airflow method, with the airflow directed generally horizontally or slightly upward. This design results in a small angle between the airflow and the windshield 4, causing the hot air to flow primarily along the glass surface rather than directly impacting the frosted areas. Due to the limited contact area between the airflow and the glass surface and its short dwell time, defrosting is ineffective, often requiring a long time to completely clear the frost from the glass. Furthermore, horizontal airflow tends to form vortices at the bottom of the glass, resulting in energy loss and further reducing defrosting efficiency.

[0055] In the embodiment of the present invention, the design of the curved air duct 31 of the air outlet elbow 3 completely changes the flow direction of the airflow, allowing the airflow to impact the surface of the windshield 4 at a more optimal angle. The geometric shape of the curved air duct 31 has been carefully designed to effectively change the direction of the airflow while maintaining the airflow rate. Compared with the traditional horizontal air outlet, the airflow of the present invention forms a larger angle with the glass surface, which increases the direct impact of the airflow on the frost and improves the heat transfer efficiency. At the same time, the optimized airflow angle can also reduce the eddy current phenomenon on the glass surface, reduce energy loss, and achieve a more efficient defrosting effect. This design not only improves the defrosting speed, but also ensures the uniformity of defrosting, avoiding the problem of incomplete local defrosting.

[0056] A mounting platform 14 is provided on the air outlet body 1 , and the mounting platform 14 is connected to the instrument panel 2 via screws 6 .

[0057] In some embodiments, a first joint 12 is provided at one end of the air outlet body 1 away from the defrost air duct, and the air outlet elbow 3 includes: a second joint 32 connected to the first joint 12; a curved air duct 33 connected to the second joint 32, and a curved air duct 31 is formed inside the curved air duct 33.

[0058] In the present invention, by providing a first connector 12 at the end of the air outlet body 1 away from the defrost air duct, and by providing the air outlet elbow 3 with a second connector 32 connected to the first connector 12 and a curved air duct 33 connected to the second connector 32, a modular connection design is achieved between the air outlet body 1 and the air outlet elbow 3. This structural design not only facilitates manufacturing and assembly, but also provides a good foundation for subsequent functional expansion. The core advantage of modular design is that each component can be independently designed, manufactured, and tested, and then assembled through standardized interfaces, greatly improving production efficiency and product quality consistency.

[0059] Specifically, the first connector 12 serves as the output port of the air outlet body 1, and its design needs to consider the smooth transition of the airflow and the reliability of the connection. The second connector 32 serves as the input port of the air outlet elbow 3, and forms a mating connection with the first connector 12 to ensure that the airflow smoothly enters the air outlet elbow 3 from the air outlet body 1. The curved air duct 33 is connected to the second connector 32, and a curved air duct 31 is formed inside it. This design allows the curved air duct 33 to be optimized specifically for the airflow steering function. After the airflow enters the first connector 12 from the first air duct 11, it passes through the connection interface between the first connector 12 and the second connector 32, and smoothly enters the curved air duct 31 in the curved air duct 33, and is ejected after completing the direction change in the curved air duct 31. This segmented design allows each component to focus on the realization of a specific function, thereby improving the performance of the overall system.

[0060] In one specific embodiment, an automobile manufacturer needs to configure defrost systems for different vehicle models. Due to differences in the instrument panel 2 structure and windshield 4 angles of different models, traditional integrated defrost vents must be designed and manufactured separately for each model, increasing development costs and production complexity. However, with the modular design of the present invention, the air outlet body 1 can be used as a standardized component, suitable for multiple models. Only the air outlet elbow 3 needs to be designed for each model. This design approach not only reduces development costs but also shortens the development cycle of new models.

[0061] Conventional defrost air outlet devices typically employ an integrated design, with the air outlet and curved portion integrally formed. While structurally simple, this design has significant limitations. First, the integrated design is difficult to standardize, requiring each vehicle model to be individually designed and manufactured, increasing development and production costs. Second, if a problem arises with a particular part of the air outlet, the entire device must be replaced, resulting in high maintenance costs. Furthermore, the integrated design limits flexible functional configuration, making it difficult to meet the specific needs of different application scenarios.

[0062] In the embodiment of the present invention, the separation of the air outlet body 1 and the air outlet elbow 3 is achieved through the connection design of the first joint 12 and the second joint 32. This modular design brings significant advantages. First, the air outlet body 1 can be produced in a standardized manner, which reduces manufacturing costs and improves production efficiency. Secondly, the air outlet elbow 3 can be customized according to specific application requirements to meet different vehicle models and different defrosting requirements. Thirdly, when a component fails, the faulty component can be replaced individually without replacing the entire device, which greatly reduces maintenance costs. Finally, the modular design also facilitates product upgrades. While keeping the air outlet body 1 unchanged, the function upgrade can be achieved by replacing the air outlet elbow 3, thereby extending the product life cycle.

[0063] In some embodiments, an air guide plate 34 is provided in the curved air duct 33 , and the air guide plate 34 divides the curved air duct 31 into a plurality of parallel air flow channels.

[0064] In this invention, by installing air guide vanes 34 within the curved air duct 33 and using them to divide the curved air duct 31 into multiple parallel airflow channels, uniform airflow distribution and flow optimization are achieved, significantly improving the uniformity and stability of the defrosting effect. The air guide vanes 34 are based on the principles of fluid mechanics. By changing the flow path and distribution of the airflow, they eliminate eddies and unevenness that may occur during the bending process, ensuring that each area receives sufficient defrosting airflow.

[0065] Specifically, the air guide blades 34 are arranged inside the curved air duct 33 at a certain spacing and angle to form a plurality of mutually parallel air flow channels. After the airflow enters the curved air duct 33 from the second joint 32, it is guided by the air guide blades 34 and diverted into each parallel channel. In each channel, the airflow flows along the guiding direction of the air guide blades 34, avoiding the airflow concentration or vortex phenomenon that may occur in the air duct with a large cross-section. The curved surface design of the air guide blades 34 matches the geometric shape of the curved air duct 31, ensuring that the airflow remains stable during the turning process and reducing flow losses. When the airflow is emitted from each parallel channel, multiple parallel airflow beams are formed. These airflow beams cover different areas of the windshield 4 to achieve a comprehensive and uniform defrosting effect.

[0066] In some embodiments, the first joint 12 is tilted upward relative to the installation surface of the air outlet body 1 , and the tilt angle is 5°-45°.

[0067] In this invention, by tilting the first joint 12 upward relative to the mounting surface of the outlet body 1 and controlling the tilt angle within a range of 5°-45°, the airflow is pre-tilted, creating favorable conditions for subsequent diversion within the curved air duct 31. This reduces the burden of airflow diversion, lowers flow resistance, and improves airflow smoothness. This pre-tilt design, based on the principle of gradual change in fluid dynamics, avoids flow separation and pressure loss that can occur with abrupt diversions through staged angle adjustment.

[0068] Specifically, the inclination angle of the first joint 12 refers to the angle between the central axis of the first joint 12 and the vertical line of the installation surface of the air outlet body 1. When the inclination angle is 5°, the first joint 12 has a slight upward tilt. This slight angle adjustment has a relatively small effect on the direction of the airflow, but it can prepare for the subsequent turning. When the inclination angle increases to 45°, the first joint 12 has a significant upward tilt. The airflow obtains a larger upward component when entering the first joint 12, which greatly reduces the turning task of the curved air duct 31. In the actual working process, the airflow enters the inclined first joint 12 from the horizontal first air duct 11. Due to the guidance of the geometric shape of the joint, the direction of the airflow begins to change, gradually turning from the original horizontal direction to the inclined upward direction. This pre-turning lays the foundation for the further turning of the airflow after entering the curved air duct 31.

[0069] In one specific embodiment, the windshield 4 of a certain sedan has a 30° inclination angle. To achieve optimal defrosting, the airflow must be emitted at an angle close to perpendicular to the glass surface. If a traditional horizontal air outlet design is used, the curved air duct 31 would need to achieve a turning angle of approximately 60°. This large turning angle would generate significant flow resistance and pressure loss. However, with the design of the present invention, the inclination angle of the first joint 12 is set to 20°. This allows the curved air duct 31 to achieve the same air outlet effect with a turning angle of only 40°.

[0070] Conventional defrost outlets typically have their first connector 12 horizontal or perpendicular to the mounting surface. While this design is structurally simple, it presents the problem of excessive airflow redirection. When airflow needs to be diverted from horizontal to a steep angle, the entire redirection task falls entirely to the curved duct 31. This results in high flow resistance within the curved duct 31, making flow separation and eddy currents more likely to occur. This not only reduces airflow efficiency but can also generate noise, impacting overall system performance.

[0071] In the embodiment of the present invention, a reasonable distribution of steering tasks is achieved through the tilt setting of the first joint 12. The first joint 12 undertakes part of the steering task, so that the airflow has a certain tilt angle before entering the curved air duct 31, so that the curved air duct 31 only needs to complete the remaining steering tasks. This staged steering design conforms to the gradual change principle in fluid mechanics, can effectively reduce flow losses and improve airflow quality. The angle range of 5°-45° is optimized and selected. The lower limit of 5° ensures the pre-tilt effect, while the upper limit of 45° avoids the structural complexity and installation difficulties that may be caused by excessive tilt.

[0072] In some embodiments, the first connector 12 and the second connector 32 are detachably connected.

[0073] In the present invention, the air outlet elbow 3 is replaceable by detachably connecting the first connector 12 and the second connector 32. This design not only facilitates the replacement of air outlet elbows 3 of different specifications according to the needs of different vehicle models, but also facilitates individual replacement of damaged components, greatly improving the system's maintenance convenience and cost-effectiveness. The core advantage of the detachable connection is that it provides a modular and standardized foundation for the system, allowing a single air outlet body 1 to be adapted to multiple different air outlet elbows 3, achieving a one-to-many product configuration.

[0074] Specifically, the detachable connection means that the connection between the first connector 12 and the second connector 32 can be assembled and disassembled without damaging any components. This connection method is usually achieved through a precise mechanical structure, such as plug-in, thread, snap 13, etc. The first connector 12 serves as a fixed part of the air outlet body 1, and its size and interface standards remain consistent, while the second connector 32, as a component of the air outlet elbow 3, can be designed into different specifications according to different application requirements. When the air outlet elbow 3 needs to be replaced, it is only necessary to disconnect the first connector 12 from the second connector 32, remove the original air outlet elbow 3, and then install the new air outlet elbow 3. The whole process is simple and quick, and does not require professional tools. Ordinary users can also operate it easily.

[0075] In a specific embodiment, a certain automobile manufacturer produces a variety of models with different positioning, including economy cars, mid-to-high-end cars and SUVs, and the angles and defrosting requirements of the windshields 4 of these models are quite different. The traditional integrated defrost air outlet device needs to be designed and produced separately for each model, resulting in high development costs and large production complexity. After adopting the detachable connection design of the present invention, the manufacturer only needs to produce a standard air outlet body 1, and then design corresponding air outlet elbows 3 for different models. Economy cars use air outlet elbows 3 with a small angle bend, mid-to-high-end cars use air outlet elbows 3 with a medium angle bend, and SUVs use air outlet elbows 3 with a large angle bend. In addition, when the air outlet elbow 3 of a certain car is accidentally damaged, the user only needs to purchase and replace the air outlet elbow 3, without having to replace the entire defrost device, and the maintenance cost is greatly reduced.

[0076] The aforementioned technical solutions still suffer from poor versatility and high maintenance costs. While the integrated design offers advantages in connection reliability, it lacks flexibility, requiring specialized design and manufacturing for each application, preventing the cost advantages of large-scale production. Furthermore, any failure in any part of the system requires replacement of the entire device, even if other components remain intact. This design results in wasted resources and increased maintenance costs.

[0077] In the embodiment of the present invention, the detachable connection design solves the above problems very well. Through the standardized connection interface, the separation of the air outlet body 1 and the air outlet elbow 3 is achieved, so that the two can be independently designed, produced and maintained. As a standardized component, the air outlet body 1 can be mass-produced to enjoy the cost advantages brought by economies of scale. As a customized component, the air outlet elbow 3 can be designed according to specific needs to meet the special requirements of different application scenarios. This design method not only reduces the overall cost, but also improves the adaptability and maintainability of the product.

[0078] In some embodiments, the first connector 12 is inserted into the second connector 32 and connected to the second connector 32 via fasteners.

[0079] In the present invention, by inserting the first connector 12 into the second connector 32 and fastening them together with fasteners, a reliable mechanical connection and good airtightness are achieved. This plug-in connection structure is not only easy to operate and highly efficient to install, but also ensures a secure connection, preventing loosening caused by vibration during vehicle operation. The advantage of the plug-in connection lies in the use of geometric fit and mechanical constraints to achieve connection, resulting in accurate positioning, rapid connection, and easy disassembly.

[0080] Specifically, the first connector 12 is inserted into the second connector 32, which means that the outer diameter of the first connector 12 and the inner diameter of the second connector 32 form a matching relationship, usually using a clearance fit or a transition fit, which not only ensures the smoothness of the plug-in, but also ensures the stability of the connection. When the first connector 12 is inserted into the second connector 32, the geometric shapes of the two match each other to form a good airflow channel, avoiding leakage and turbulence of the airflow at the connection. Fasteners serve as auxiliary connecting elements to further enhance the reliability of the connection and prevent accidental separation under external force. During operation, the airflow enters the second connector 32 from the first connector 12. Since the first connector 12 is located inside the second connector 32, the airflow direction is perpendicular to the connection interface. The pressure generated by this flow mode helps to enhance the stability of the connection and form a self-locking effect.

[0081] In some embodiments, the fastener includes a snap-fit ​​buckle 13 and a snap-fitting slot 35 , one of which is disposed on the first connector 12 , and the other is disposed on the second connector 32 .

[0082] In the present invention, a snap-fit ​​buckle 13 and a slot 35 are used as fasteners, and are provided on the first connector 12 and the second connector 32, respectively, to achieve a quick and reliable mechanical connection. This snap-fit ​​structure offers advantages such as ease of operation, rapid connection, no tool requirements, and reusability. The snap-fit ​​connection operates based on elastic deformation and geometric constraints, achieving insertion through elastic deformation of the buckle 13 and locking through geometric constraints, making it an efficient and quick connection method.

[0083] Specifically, the buckle 13 is usually designed as a cantilever beam structure with a certain elasticity, with an enlarged head at the end, and the slot 35 is designed as a groove structure that matches the shape of the head of the buckle 13. When connected, the buckle 13 undergoes elastic deformation under the action of an external force, and the head shrinks through the contracted part of the slot 35, and then returns to its original shape under the action of the elastic force, and the head expands to the enlarged part of the slot 35, forming a mechanical lock. The advantage of this connection method is that there is obvious tactile and auditory feedback during the connection process, and the user can clearly sense whether the connection is in place. The design of the buckle 13 and the slot 35 needs to take into account factors such as the elastic modulus, yield strength, fatigue life, etc. of the material to ensure that it can withstand multiple assembly and disassembly without failure within the expected service life.

[0084] Preferably, the buckles 13 are provided on the outer surface of the first joint 12 and are spaced apart along the length direction of the first joint 12 ; the slots 35 are provided on the inner side wall of the second joint 32 and are spaced apart along the length direction of the second joint 32 .

[0085] In some embodiments, a sealing ring 5 is further included, and the sealing ring 5 is arranged at the connection between the first joint 12 and the second joint 32 .

[0086] In the present invention, a sealing ring 5 is provided at the junction of the first connector 12 and the second connector 32, effectively sealing the connection. This prevents air leakage from the connection, ensuring full utilization of the defrost air volume while also avoiding noise issues caused by air leakage. The operating principle of the sealing ring 5 is based on a contact seal. The elastic deformation of the sealing ring 5 material forms a continuous contact line on the mating surfaces, blocking the leakage path and achieving an airtight seal.

[0087] Specifically, the sealing ring 5 is usually made of elastic materials such as rubber or polyurethane, and has good elasticity and aging resistance. The sealing ring 5 is arranged at the connection between the first joint 12 and the second joint 32. When the two joints are connected, the sealing ring 5 is compressed, elastically deformed, and a sealing contact is formed on the mating surface of the joint. The cross-sectional shape of the sealing ring 5 is usually designed to be O-shaped, rectangular or other special shapes to obtain the best sealing effect. During operation, the defrost airflow has a certain pressure at the connection. This pressure helps to enhance the contact pressure between the sealing ring 5 and the mating surface, improve the sealing effect, and form a self-reinforced seal. The sealing ring 5 can also compensate for changes in the fitting clearance caused by factors such as manufacturing tolerances and thermal deformation, ensuring that good sealing performance can be maintained under various working conditions.

[0088] In one specific embodiment, a high-end sedan has stringent requirements for noise control in its defrost system, requiring the system noise level to be no more than 40dB at maximum defrost power. In a design without a sealing ring 5, the tiny gap at the joint would generate a high-frequency whistling sound, seriously affecting passenger comfort. By installing a dedicated sealing ring 5 between the first joint 12 and the second joint 32, the sealing performance of the joint is greatly improved.

[0089] In the embodiment of the present invention, the provision of the sealing ring 5 effectively solves the problem of airtightness. As a special sealing element, the sealing ring 5 can adapt to the microscopic unevenness of the mating surface, fill the tiny gaps, and form a continuous sealing surface. Compared with the direct contact of hard materials, the soft material of the sealing ring 5 can better fit the mating surface, greatly improving the sealing effect. At the same time, the sealing ring 5 also has a certain degree of adaptability, which can compensate for dimensional changes caused by factors such as temperature changes and component aging, and ensure the sealing reliability during long-term use. From the perspective of noise control, a good seal can eliminate high-frequency leakage noise and significantly improve the acoustic performance. Compared with the design without the sealing ring 5, the sealing design of the present invention has significantly improved airtightness, and also significantly improved noise control, which comprehensively improves the performance level of the system.

[0090] In some embodiments, the central angle of the curved air duct 31 is 15°-90°.

[0091] In this invention, by limiting the central angle of the curved duct 31 to a range of 15°-90°, optimal control of the airflow deflection angle is achieved. This ensures effective airflow direction change while avoiding excessive flow resistance caused by excessive curvature, achieving an optimal balance between defrosting effectiveness and energy consumption. The central angle is a key parameter describing the geometric characteristics of the curved duct 31, directly affecting the flow state and pressure loss within the curve.

[0092] Specifically, the center angle of the curved air duct 31 refers to the angle between the inlet center line and the outlet center line of the curved air duct 31. This angle determines the degree of airflow diversion. When the center angle is 15°, the degree of curvature of the curved air duct 31 is small, the airflow diversion is relatively gentle, the flow resistance is small, but the change in airflow direction is also relatively limited. When the center angle is 90°, the curved air duct 31 forms a right-angle bend, the airflow direction changes the most, and a complete conversion from horizontal to vertical can be achieved, but at the same time the flow resistance also reaches the maximum. In actual applications, it is necessary to select a suitable center angle based on the specific defrosting requirements and the angle of the windshield 4. Under the premise of ensuring the defrosting effect, the flow resistance should be minimized to improve the system efficiency.

[0093] In some embodiments, the air outlet elbow 3 includes an adjustment structure for adjusting the center angle of the curved air duct 31 .

[0094] In this invention, an adjustable structure is incorporated into the outlet elbow 3, which is used to adjust the central angle of the curved air duct 31. This allows for precise adjustment of the defrost outlet angle to suit the windshield angle 4 of different vehicle models and varying defrosting requirements, significantly improving the product's applicability and controllability of the defrosting effect. The core value of the adjustable structure lies in converting fixed geometric parameters into variable ones, enabling a single product to adapt to a variety of application scenarios and enhancing both its versatility and user experience.

[0095] Specifically, the adjustment structure usually includes movable geometric elements and corresponding control mechanisms, and the relative positions of these elements are changed to change the geometric shape of the curved air duct 31, thereby adjusting the degree of the center angle. The adjustment process can be continuous or graded, depending on the specific design requirements and cost considerations. During the adjustment process, it is necessary to ensure the continuity and sealing of the airflow channel to avoid airflow leakage or poor flow due to adjustment. The adjustment structure also needs to have a locking function, which can be reliably locked after being adjusted to the appropriate position to prevent position displacement due to vibration during vehicle driving. The entire adjustment process should be easy to operate, and the user should be able to easily complete the adjustment according to actual needs.

[0096] In some embodiments, the first connector 12 and the second connector 32 are connected by threads.

[0097] In the present invention, a threaded connection is used to connect the first connector 12 and the second connector 32, providing reliable mechanical connection strength and excellent sealing performance. This connection method has the advantages of a secure connection, strong vibration resistance, and reliable sealing, making it particularly suitable for applications requiring high connection reliability. The working principle of the threaded connection is based on the mechanical principle of a screw pair. The spiral motion of the thread achieves axial clamping, generating a strong clamping force and ensuring the reliability of the connection.

[0098] Specifically, threaded connection refers to processing external threads on the outer surface of the first joint 12 and processing internal threads on the inner surface of the second joint 32, and the two are connected by threaded cooperation. The parameters of the thread include pitch, tooth angle, thread diameter, etc., which need to be designed according to the specific load requirements and sealing requirements. During the connection process, the thread pairs are engaged with each other through rotational motion, generating an axial clamping force. This clamping force not only ensures the firmness of the connection, but also helps to achieve sealing performance. The threaded connection has good pull-off resistance and will not accidentally separate even under the action of a large external force. The connection can only be released by reverse rotation. This connection method also has a certain self-locking function. Under the action of load, the thread pairs tend to engage more tightly, improving the reliability of the connection.

[0099] In some embodiments, the first connector 12 and the second connector 32 are connected via an elastic spring.

[0100] In the present invention, the connection between the first connector 12 and the second connector 32 is achieved by using an elastic retaining spring connection. This combines the advantages of elastic connection and mechanical locking, achieving both rapid assembly and ensuring connection reliability. This connection method is particularly suitable for applications requiring frequent assembly and disassembly or requiring high assembly efficiency. The operating principle of the elastic retaining spring connection is based on the deformation and recovery of an elastic element. Assembly is achieved through the elastic deformation of the retaining spring, and locking is achieved through the elastic recovery force.

[0101] Specifically, elastic retaining springs are usually made of high-strength elastic materials such as spring steel, and have good elasticity and fatigue properties. The structural design of the retaining spring needs to take into account multiple factors such as assembly force, locking force, fatigue life, etc., to ensure both a smooth assembly process and a reliable locking state. During the connection process, the retaining spring undergoes elastic deformation under the action of external force, allowing the first connector 12 to be inserted into the second connector 32. When the predetermined position is reached, the retaining spring returns to its original shape, locking the relative positions of the two connectors. The retaining spring connection has clear assembly feedback, and when locked in place, it will produce obvious tactile and sound feedback, so the user can clearly know whether the connection is correct. This connection method also has a certain compensation capability and can adapt to the influence of manufacturing tolerances and thermal deformation.

[0102] In some embodiments, the adjustment structure includes a movable joint.

[0103] In the present invention, by providing a movable joint as an adjustment structure in the outlet elbow 3, the central angle of the curved air duct 31 can be continuously adjusted. This design provides high-precision angle adjustment capability, can meet precise defrost angle requirements, and significantly improves the controllability of the defrost effect and the applicability of the product. The operating principle of the movable joint is similar to that of human joints. The continuous change of angle is achieved through the rotation of the joint, which has the advantages of high adjustment accuracy, intuitive operation, and relatively simple structure.

[0104] Specifically, the movable joint is usually composed of a rotating shaft, a bearing, a housing and other components. The rotating shaft serves as the center of rotation, the bearing reduces rotational friction, and the housing provides structural support and sealing protection. In the curved air duct 31, the movable joint divides the air duct into two sections, and the angle between the two sections of the air duct is changed by rotating the joint, thereby adjusting the center angle of the entire curved air duct 31. The rotation range of the joint needs to be determined according to the application requirements, usually between 30°-120°, to meet different angle adjustment requirements. In order to ensure the continuity of the airflow, a special sealing design needs to be adopted at the joint to prevent airflow leakage. The joint also needs to have a locking function, which can be reliably locked after adjusting to the appropriate angle to prevent position displacement during use.

[0105] In some embodiments, the adjustment structure includes a sliding guide and a locking mechanism.

[0106] In this invention, the combination of a sliding guide and a locking mechanism as the adjustment structure enables precise adjustment and reliable locking of the central angle of the curved air duct 31. This design ensures both flexibility and precision in adjustment while ensuring stability of the adjusted position. It is particularly suitable for applications requiring both high adjustment accuracy and position stability. The sliding guide provides smooth movement guidance, while the locking mechanism ensures fixed position after adjustment. The combination of the two achieves high-performance adjustment functionality.

[0107] Specifically, the sliding guide rail is usually composed of a guide rail and a slider, the guide rail provides a motion trajectory, and the slider slides on the guide rail and carries the movable parts. In the application of the curved air duct 31, the sliding guide rail is used to guide the movement of the air duct assembly, and the geometric shape of the air duct is changed by movement, thereby adjusting the center angle. The sliding guide rail needs to have good guiding accuracy and smooth movement to ensure the continuity and sealing of the air duct during the adjustment process. The locking mechanism usually adopts a wedge lock, a thread lock or other mechanical locking method to lock the slider on the guide rail after adjusting to the appropriate position to prevent position displacement under the action of external force. The locking mechanism also needs to have a quick locking and unlocking function to facilitate user operation.

[0108] Among them, Figure 7As shown, the comparison simulation diagram of the defrosting effect within the time specified by the national standard GB11555-2009: among them, the Ⅰ in the left area is the simulation diagram of the defrosting effect without connecting to the elbow air outlet, and the Ⅱ in the right area is the simulation diagram of the defrosting effect with connecting to the elbow air outlet.

[0109] like Figure 8 As shown in the figure, under the premise of complying with the requirements of the national standard GB11555-2009, the aerodynamic noise comparison simulation diagram is as follows: Among them, the Ⅲ in the left area is the aerodynamic noise simulation diagram of the air outlet without connecting to the elbow, and the Ⅳ in the right area is the aerodynamic noise simulation diagram of the air outlet with connecting to the elbow.

[0110] An embodiment of the present application provides a vehicle, including: an instrument panel 2; and the above-mentioned defrost air outlet device, which is arranged on the instrument panel 2.

[0111] In this invention, by integrating the defrost air outlet device into the vehicle and placing it on the instrument panel 2, the vehicle is provided with an efficient and reliable defrost function, significantly improving driving safety and passenger comfort, especially in adverse weather conditions such as fog, rain, and snow. This vehicle-level integrated application demonstrates the practical value and market significance of the present invention's technical solution, transforming technological innovation into tangible user value.

[0112] Specifically, as a complex system, the vehicle needs to consider the coordination with other systems when integrating the defrost air outlet device, including the HVAC system, electrical system, control system, etc. The instrument panel 2 is the installation location of the defrost air outlet device, which has the advantages of being close to the windshield 4, having a suitable layout space, and being convenient for airflow guidance. The defrost air outlet device obtains the hot air required for defrosting by connecting to the defrost air duct of the vehicle, and guides the hot air to the windshield 4 at the best angle through the optimized airflow direction design, thereby achieving efficient defrosting. The entire system can respond quickly after the vehicle is started, providing the driver with a clear field of view and ensuring driving safety.

[0113] In a specific embodiment, a certain family car often encounters the problem of frost and ice on the windshield 4 during winter use in northern regions, which seriously affects driving safety. The traditional defrost system takes a long time to clear the frost, and the defrosting effect is uneven, and there is a defrosting blind spot. After adopting the defrost air outlet device of the present invention, the defrost time of the vehicle is shortened from the original 8-10 minutes to 4-5 minutes, and the defrost blind spot is completely eliminated. In actual road tests, the vehicle can quickly restore a clear field of view under various adverse weather conditions, greatly improving driving safety. User feedback shows that the new defrost system is not only highly efficient, but also has low noise and significantly improved comfort.

[0114] Conventional vehicle defrost systems typically employ a simple direct-flow design with a single airflow direction, resulting in limited defrosting effectiveness. This design suffers from issues such as long defrosting times, uneven results, and blind spots. Especially in extremely cold regions, conventional defrost systems often fail to meet the demand for rapid defrosting, compromising driving safety. Furthermore, conventional systems lack versatility and are difficult to adapt to the needs of different vehicle models, increasing development and production costs.

[0115] In the embodiment of the present invention, the integrated application of the defrost air outlet device significantly improves the vehicle's defrosting performance. Through the optimized airflow design, a more efficient defrosting effect is achieved, the defrosting time is shortened, and the defrosting quality is improved. The modular design allows the same technical solution to be applied to different vehicle models, reducing development costs and improving the market competitiveness of the product. From a safety perspective, an efficient defrosting function is directly related to driving safety, and the technical solution of the present invention has made an important contribution to improving vehicle safety. From the perspective of user experience, the fast, quiet, and uniform defrosting effect greatly improves riding comfort and enhances the user value of the product.

[0116] In some embodiments, a plurality of defrost air outlet devices are included, and the plurality of defrost air outlet devices are arranged at intervals along the length direction of the instrument panel 2 .

[0117] In this invention, by arranging multiple defrost air outlets at intervals along the length of the instrument panel 2, full coverage defrosting of the windshield 4 is achieved, effectively eliminating defrosting blind spots and ensuring a completely clear field of vision for the driver. Furthermore, the distributed design avoids the localized overheating and uneven airflow problems associated with single-point centralized air supply. Multi-point distributed defrosting is a significant improvement over traditional single-point defrosting, demonstrating the advantages of a systematic design.

[0118] Specifically, multiple defrost air outlet devices are arranged along the length of the instrument panel 2 at a certain interval. Each device is responsible for a specific area of ​​the windshield 4, and comprehensive defrosting is achieved through multi-point collaborative work. The arrangement spacing needs to be determined based on factors such as the size of the windshield 4, the air outlet range of the defrost device, and the diffusion characteristics of the airflow. It is necessary to ensure the integrity of the coverage and avoid mutual interference between adjacent airflows. Each defrost air outlet device can be adjusted independently and personalized according to the defrosting needs of different areas to achieve precise defrosting. The distributed layout also has the advantage of redundancy. Even if a device fails, other devices can still maintain basic defrosting functions, thereby improving the reliability of the system.

[0119] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an", and "" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain", and "have" are inclusive and therefore specify the presence of the stated features, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0120] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0121] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A defrosting air outlet device, characterized in that: include: An air outlet body (1) is arranged on a dashboard (2) of a vehicle, wherein the air outlet body (1) comprises a first air duct (11), one end of the first air duct (11) being connected to a defrost air duct of the vehicle; An air outlet elbow (3) is connected to an end of the air outlet body (1) away from the defrost air duct. The air outlet elbow (3) has a curved air duct (31) connected to the first air duct (11). The curved air duct (31) is used to change the direction of the airflow to reduce the angle between the airflow and the vehicle windshield (4) when the airflow is ejected.

2. The defrost air outlet device according to claim 1, characterized in that: A first joint (12) is provided at one end of the air outlet body (1) away from the defrosting air duct, and the air outlet elbow (3) comprises: a second connector (32) connected to the first connector (12); The curved air duct (33) is connected to the second joint (32), and the curved air duct (31) is formed inside the curved air duct (33).

3. The defrost air outlet device according to claim 2, characterized in that: An air guide plate (34) is provided in the curved air duct (33), and the air guide plate (34) divides the curved air duct (31) into a plurality of parallel air flow channels.

4. The defrost air outlet device according to claim 2, characterized in that: The first joint (12) is arranged to be tilted upward relative to the installation surface of the air outlet body (1), with an inclination angle of 5°-45°.

5. The defrost air outlet device according to claim 2, characterized in that: The first connector (12) and the second connector (32) are detachably connected.

6. The defrost air outlet device according to claim 5, characterized in that: The first connector (12) is inserted into the second connector (32) and connected to the second connector (32) via a fastener.

7. The defrost air outlet device according to claim 6, characterized in that: The fastener comprises a snap-fit ​​buckle (13) and a snap-fit ​​slot (35), one of the snap-fit ​​buckle (13) and the snap-fit ​​slot (35) being arranged on the first joint (12), and the other being arranged on the second joint (32).

8. The defrost air outlet device according to claim 6, characterized in that: It also includes a sealing ring (5), which is arranged at the connection between the first joint (12) and the second joint (32).

9. The defrost air outlet device according to claim 1, characterized in that: The air outlet elbow (3) comprises an adjustment structure for adjusting the center angle of the curved air duct (31).

10. A vehicle, characterized in that: include: Instrument panel (2); The defrost air outlet device according to any one of claims 1 to 9 is arranged on the instrument panel (2).

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