Automobile air conditioner evaporator flow guide device
Patent Information
- Application Number
- CN202522472560.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-21
- Publication Date
- 2026-10-16
- Estimated Expiration
- 2035-11-21
AI Technical Summary
[0006]本实用新型提供的一种汽车空调蒸发器导流装置，可以解决现有技术中汽车空调蒸发器导流装置存在的气流均匀性不足的问题
[0017] The beneficial effects of this utility model are as follows: By setting an arc-shaped and hollow secondary guide plate between the main guide plate and the guide rib assembly within the guide shell, this utility model effectively solves the problem of uneven airflow distribution in traditional guide devices. After the airflow is initially divided by the main guide plate, it can smoothly pass through the hollow structure of the secondary guide plate. The concave surface of the arc-shaped main rib can gather and guide the airflow to form multiple uniform airflows in the height direction. The vertical secondary rib further divides the airflow in the width direction. Combined with the guide ribs in the guide rib assembly that are spaced apart along the width direction and whose length gradually changes along the height direction, as well as the arc-shaped windward surface at one end of the guide rib and the tapered pointed structure at the other end, the airflow is precisely adapted to the heat exchange requirements in the height direction of the evaporator core, avoiding localized airflow. In cases of overheating or underheating, the uniformity and efficiency of heat exchange in the evaporator core are significantly improved, fully utilizing the evaporator's cooling performance. Furthermore, the inclined surface design at the bottom of the guide channel, sloping from the end furthest from the inlet towards the inlet, allows condensate to naturally converge at the inlet under gravity. The annular protrusion on the inner wall of the elastic sealing ring tightly adheres to the outer wall of the inlet, forming multiple seals that effectively prevent condensate leakage from the connection points. Simultaneously, the coating on the inner wall of the guide channel prevents condensate from accumulating and breeding bacteria or causing corrosion of the channel. Ultimately, this achieves a stable discharge of condensate to the outside of the vehicle, protecting the internal components of the guide housing from condensate corrosion, extending the device's lifespan, and ensuring a clean and healthy environment inside the vehicle.
Smart Images
Figure CN224860727U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive air conditioning technology, and in particular to an automotive air conditioning evaporator guide device. Background Technology
[0002] In automotive air conditioning systems, the evaporator flow guide device is a key auxiliary component that ensures efficient heat exchange of the evaporator core. Its main function is to guide the airflow delivered by the fan to flow evenly through the evaporator core and to collect and discharge the condensate generated during the operation of the evaporator. Currently, this type of device in existing technology has formed a relatively conventional structural design and operation mode.
[0003] In existing technologies, the core structure of automotive air conditioning evaporator guide devices is mostly a combination of a single flat guide plate and a fixed-length guide rib. Only one complete solid flat guide plate is set inside the guide housing. This flat guide plate is fixed horizontally or vertically inside the guide housing and is located between the fan and the guide rib group. The guide rib group is composed of several straight guide ribs of the same length. The guide ribs are vertically fixed to the side of the guide housing near the evaporator and are not directly connected to the flat guide plate.
[0004] Its operation process is as follows: When the airflow delivered by the fan enters the guide shell, it will directly impact the solid flat guide plate. Some of the airflow is bounced off the flat guide plate and forms turbulence inside the shell. The remaining airflow is squeezed in from the gap between the flat guide plate and the inner wall of the shell, and then flows to the straight guide ribs of the same length. After the airflow is divided by the guide ribs, because the length of the guide ribs is not gradually changed, it cannot adapt to the heat exchange requirements in the height direction of the evaporator core. Finally, it flows to the evaporator core with uneven airflow distribution.
[0005] This structure and operation method have some problems: On the one hand, the solid flat plate guide plate has no hollow or arc design, so it cannot effectively guide and divide the airflow. After the airflow impacts the plate, it is easy to bounce and form turbulence. It can only squeeze in from the edge gap, resulting in a serious uneven distribution of airflow in the width and height directions, with local airflow accumulation and local airflow deficiency. On the other hand, the straight guide ribs of equal length cannot distribute the airflow according to the heat exchange area difference in the height direction of the evaporator core. This easily causes insufficient airflow at the top of the evaporator core and excessive airflow at the bottom, further aggravating the problem of low heat exchange efficiency. Utility Model Content
[0006] The present invention provides an airflow guiding device for automotive air conditioning evaporators, which can solve the problem of insufficient airflow uniformity in existing automotive air conditioning evaporator airflow guiding devices.
[0007] A flow guiding device for an automotive air conditioning evaporator includes a flow guiding shell, a main flow guiding plate, and a flow guiding rib assembly. The flow guiding shell is a box structure with one open end. The main flow guiding plate is disposed inside the flow guiding shell near its closed end. The flow guiding rib assembly is disposed inside the flow guiding shell near its open end. A secondary flow guiding plate is also provided inside the flow guiding shell. The secondary flow guiding plate is disposed between the main flow guiding plate and the flow guiding rib assembly. The secondary flow guiding plate is arc-shaped and hollow. The secondary guide plate includes an arc-shaped main rib and a vertical secondary rib. The arc-shaped main rib extends along the width direction of the guide shell, and the vertical secondary rib extends along the height direction of the guide shell. The arc-shaped main rib and the vertical secondary rib are interlocked to form a hollow structure. The guide rib assembly is connected to the side of the secondary guide plate away from the main guide plate.
[0008] Preferably, the concave surface of the arc-shaped main rib faces the main flow plate, and there are several arc-shaped main ribs, which are spaced apart along the height direction of the flow guide shell.
[0009] Preferably, there are several vertical secondary ribs, which are spaced apart along the width direction of the flow guide shell, and connecting holes are provided on both the arc-shaped main rib and the vertical secondary ribs.
[0010] Preferably, the guide ribs are composed of several guide ribs, and each guide rib has a rounded windward surface at one end near the secondary guide plate, and a tapered tip at the other end.
[0011] Preferably, the guide ribs are spaced apart along the width direction of the guide shell, and the length of the guide ribs is gradually changed along the height direction of the guide shell.
[0012] Preferably, the main flow plate is fixedly installed in the flow guide housing in an inclined shape, and the main flow plate is provided with flow guide holes distributed along the width direction of the main flow plate. The two side edges of the main flow plate are connected to the inner wall of the flow guide housing.
[0013] Preferably, the flow guide housing is further provided with a flow diversion assembly, which includes a flow guide groove, an elastic sealing ring and a drain pipe; The flow guide channel is located on the bottom inner side of the flow guide housing, and the bottom of the flow guide channel is provided with a flow outlet; The elastic sealing ring is fitted around the outside of the drain port, and one end of the drain pipe is inserted into the elastic sealing ring.
[0014] Preferably, the inner wall of the elastic sealing ring is provided with an annular protrusion, which fits and adapts to the outer wall of the drainage port.
[0015] Preferably, the bottom of the flow guide groove is an inclined surface, which slopes from the other end of the flow guide shell towards the flow outlet. The flow guide groove and the flow guide shell are an integral structure. The inner wall of the flow guide groove is provided with a coating, which covers the inner surface of the flow guide groove.
[0016] Preferably, the top of the flow guide housing is provided with a positioning pin, the positioning pin extends along the height direction of the flow guide housing, and the positioning pin and the flow guide housing are an integral structure.
[0017] The beneficial effects of this utility model are as follows: By setting an arc-shaped and hollow secondary guide plate between the main guide plate and the guide rib assembly within the guide shell, this utility model effectively solves the problem of uneven airflow distribution in traditional guide devices. After the airflow is initially divided by the main guide plate, it can smoothly pass through the hollow structure of the secondary guide plate. The concave surface of the arc-shaped main rib can gather and guide the airflow to form multiple uniform airflows in the height direction. The vertical secondary rib further divides the airflow in the width direction. Combined with the guide ribs in the guide rib assembly that are spaced apart along the width direction and whose length gradually changes along the height direction, as well as the arc-shaped windward surface at one end of the guide rib and the tapered pointed structure at the other end, the airflow is precisely adapted to the heat exchange requirements in the height direction of the evaporator core, avoiding localized airflow. In cases of overheating or underheating, the uniformity and efficiency of heat exchange in the evaporator core are significantly improved, fully utilizing the evaporator's cooling performance. Furthermore, the inclined surface design at the bottom of the guide channel, sloping from the end furthest from the inlet towards the inlet, allows condensate to naturally converge at the inlet under gravity. The annular protrusion on the inner wall of the elastic sealing ring tightly adheres to the outer wall of the inlet, forming multiple seals that effectively prevent condensate leakage from the connection points. Simultaneously, the coating on the inner wall of the guide channel prevents condensate from accumulating and breeding bacteria or causing corrosion of the channel. Ultimately, this achieves a stable discharge of condensate to the outside of the vehicle, protecting the internal components of the guide housing from condensate corrosion, extending the device's lifespan, and ensuring a clean and healthy environment inside the vehicle. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of the airflow guiding device for the evaporator of this automotive air conditioner. Figure 2 This is a top view of the airflow guide device for the evaporator of this automotive air conditioner; Figure 3 for Figure 2 A sectional view along the cutting line AA.
[0019] Explanation of reference numerals in the attached figures: 1. Flow guide shell; 2. Main flow guide plate; 21. Flow guide hole; 3. Flow guide rib assembly; 31. Flow guide rib; 32. Arc-shaped windward surface; 4. Secondary flow guide plate; 41. Arc-shaped main rib; 42. Vertical secondary rib; 5. Flow diversion assembly; 51. Flow guide groove; 511. Flow diversion port; 52. Elastic sealing ring; 53. Drain pipe; 6. Positioning pin. Detailed Implementation
[0020] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.
[0021] like Figures 1 to 3 As shown in the figure, an embodiment of the present invention provides an evaporator flow guiding device for an automotive air conditioner, comprising a flow guiding shell 1, a main flow guiding plate 2, and a flow guiding rib group 3. The flow guiding shell 1 is a box structure with one end open. The main flow guiding plate 2 is disposed inside the flow guiding shell 1 near its closed end. The flow guiding rib group 3 is disposed inside the flow guiding shell 1 near its open end. The flow guiding shell 1 also provides a secondary flow guiding plate 4, which is disposed between the main flow guiding plate 2 and the flow guiding rib group 3. The secondary flow guiding plate 4 is arc-shaped and hollow. The secondary guide plate 4 includes an arc-shaped main rib 41 and a vertical secondary rib 42. The arc-shaped main rib 41 extends along the width direction of the guide shell 1, and the vertical secondary rib 42 extends along the height direction of the guide shell 1. The arc-shaped main rib 41 and the vertical secondary rib 42 are connected in an alternating manner to form a hollow structure. The guide rib group 3 is connected to the side of the secondary guide plate 4 away from the main guide plate 2.
[0022] The secondary guide plate 4 is located in the middle area between the main guide plate 2 and the guide rib group 3, forming a complete airflow transmission path. The arc-shaped main rib 41 and the vertical secondary rib 42 are connected by an interlacing to form a hollow structure. The guide rib group 3 is fixedly connected to the side of the secondary guide plate 4 that is away from the main guide plate 2. In traditional airflow guiding devices, airflow is prone to uneven distribution due to the lack of transitional guidance, and solid plates can easily block airflow. The arc-shaped and hollow secondary airflow guiding plate 4 can guide the direction of airflow through the arc structure and avoid airflow obstruction through the hollow structure. The staggered hollow design of the arc-shaped main rib 41 and the vertical secondary rib 42 allows airflow to pass smoothly through the secondary airflow guiding plate 4. At the same time, the arc structure can buffer the impact of airflow and avoid the generation of turbulence. The airflow guiding rib group 3 is directly connected to the secondary airflow guiding plate 4, ensuring that the airflow is accurately transmitted to the airflow guiding rib group 3 after being guided by the secondary airflow guiding plate 4, laying the foundation for the subsequent uniform distribution of airflow and preventing airflow from accumulating in the airflow guiding shell 1.
[0023] The concave surface of the arc-shaped main rib 41 faces the main flow plate 2. Several arc-shaped main ribs 41 are provided, and the arc-shaped main ribs 41 are distributed at intervals along the height direction of the flow guide shell 1.
[0024] Several arc-shaped main ribs 41 are evenly spaced along the height direction of the flow guide shell 1, and the concave surface of each arc-shaped main rib 41 faces the main flow plate 2. When they are intersected and connected with the vertical secondary ribs 42, they form a hollow frame with the concave surface uniformly facing the direction of airflow. If the concave surface of the arc-shaped main rib 41 faces away from the main flow plate 2, the airflow is easily bounced when it comes into contact with the secondary flow plate 4, resulting in airflow turbulence. The distribution of several arc-shaped main ribs 41 at intervals along the height direction can ensure that there are arc-shaped structures to guide the airflow within the height range of the flow guide shell 1, avoiding dead airflow in some unguided areas. The design of the concave surface facing the main flow plate 2 allows the airflow flowing out from the main flow plate 2 to naturally enter the concave area of the arc-shaped main rib 41. The airflow is gathered by the enveloping property of the concave surface, preventing the airflow from spreading to both sides. The distribution of several arc-shaped main ribs 41 at intervals along the height direction can divide the airflow into multiple uniform airflows in the height direction, providing conditions for the further distribution of the subsequent vertical secondary ribs 42 and improving the overall uniformity of the airflow.
[0025] The vertical secondary ribs 42 are provided in several ways and are distributed at intervals along the width direction of the flow guide shell 1. Both the arc-shaped main rib 41 and the vertical secondary ribs 42 are provided with connecting holes.
[0026] Several vertical secondary ribs 42 are evenly spaced along the width direction of the flow guide shell 1 and intersect with the arc-shaped main ribs 41 distributed along the height direction. They are detachable or fixedly connected through the connection holes on both, and together they form a stable hollow structure. Relying solely on the arc-shaped main rib 41 is insufficient to achieve uniform airflow distribution in the width direction, easily leading to localized excess or deficiency of airflow. The connection holes ensure the connection strength between the arc-shaped main rib 41 and the vertical secondary rib 42, preventing separation due to airflow impact. This also facilitates disassembly and replacement during later maintenance. The vertical secondary ribs 42 are spaced apart along the width direction, further dividing the airflow gathered by the arc-shaped main rib 41 in the width direction, ensuring uniform airflow distribution across the entire width of the guide vane 1. The connection holes enhance the overall stability of the secondary guide vane 4 structure and facilitate future maintenance, preventing the need for complete replacement due to damage to the secondary guide vane 4 and reducing maintenance costs. The guide rib group 3 is divided into several guide ribs 31. Each guide rib 31 has a rounded windward surface 32 at one end near the secondary guide plate 4, and the other end is tapered to a point.
[0027] Each guide rib 31 has an arc-shaped windward surface 32. One end of the surface is connected to the side of the secondary guide plate 4 away from the main guide plate 2, and the other end faces the opening end of the guide shell 1. Several guide ribs 31 together form a guide rib group 3. If the traditional guide rib 31 has a sharp structure at the windward end, it is easy to generate turbulence and noise when the airflow impacts. If there is no tapering design at the end, the airflow will easily diffuse after flowing out of the guide rib, and cannot flow accurately to the evaporator. The design of the arc-shaped windward surface 32 allows the airflow flowing out of the secondary guide plate 4 to smoothly contact the guide rib 31. The arc surface buffers the airflow impact, reduces the friction between the airflow and the guide rib 31, and reduces wind noise. The tapering and pointed design at the end can guide the airflow to flow in a specific direction, avoid the airflow from diffusing after flowing out of the guide rib 31, ensure that the airflow flows accurately to the heat exchange area of the evaporator, and improve the heat exchange efficiency.
[0028] The guide ribs 31 are distributed at intervals along the width direction of the guide shell 1, and the length of the guide ribs 31 is gradually changed along the height direction of the guide shell 1.
[0029] Several guide ribs 31 are evenly spaced along the width direction of the guide shell 1. After being connected to the secondary guide plate 4, their length gradually changes from the top to the bottom of the guide shell 1. The top guide ribs 31 are long and the bottom guide ribs 31 are short, forming a length gradient in the height direction. The heat exchange area of the evaporator core may vary in the height direction, such as a large heat exchange area at the top and a small heat exchange area at the bottom. If the length of the guide ribs 31 is uniform, it is easy to cause insufficient airflow in the area with a large heat exchange area and excessive airflow in the area with a small heat exchange area. The spaced distribution along the width direction can ensure uniform airflow distribution in the width direction. The spaced distribution of the guide ribs 31 along the width direction can further divide the airflow transmitted by the secondary guide plate 4 into uniform sections in the width direction. The design with the length gradually changing along the height direction can distribute the airflow according to the heat exchange requirements in the height direction of the evaporator core. For example, a longer guide rib 31 can guide more airflow to the top area with a large heat exchange area, and a shorter guide rib 31 can guide an appropriate amount of airflow to the bottom area with a small heat exchange area, so as to achieve precise matching between airflow and heat exchange requirements and improve the overall heat exchange efficiency of the evaporator.
[0030] The main flow plate 2 is fixedly installed in the flow guide housing 1 in an inclined shape. The main flow plate 2 has flow guide holes 21, which are distributed along the width direction of the main flow plate 2. The two side edges of the main flow plate 2 are connected to the inner wall of the flow guide housing 1.
[0031] The main flow plate 2 is fixedly connected to the inner wall of the flow guide shell 1 through its two side edges, and is inclined as a whole. The flow guide holes 21 are evenly distributed on the surface of the main flow plate 2 and are arranged along the width direction of the main flow plate 2. If the main flow plate 2 is horizontal or vertical, the airflow is prone to vertically impacting the plate, causing airflow rebound or local accumulation. If there are no guide holes 21 or the guide holes 21 are unevenly distributed, the airflow will not be able to enter the subsequent structure evenly, resulting in an unbalanced airflow distribution. The inclined installation of the main flow plate 2 can change the initial flow direction of the airflow, allowing the airflow to flow towards the secondary flow plate 4 at a gentle angle, avoiding the turbulence caused by vertical airflow impact. The guide holes 21 are distributed along the width direction, which can evenly divide the concentrated airflow blown in by the fan in the width direction and accurately transmit it to the secondary flow plate 4 through the guide holes 21, laying the foundation for further distribution of the subsequent airflow. The connection between the main flow plate 2 and the inner wall of the guide housing 1 ensures the installation stability of the main flow plate 2 and avoids displacement caused by airflow impact, which would affect the airflow distribution effect.
[0032] The flow guide housing 1 is also provided with a flow guide assembly 5, which includes a flow guide groove 51, an elastic sealing ring 52 and a drain pipe 53; The flow guide groove 51 is disposed on the bottom inner side of the flow guide housing 1, and the bottom of the flow guide groove 51 is provided with a flow outlet 511; The elastic sealing ring 52 is sleeved on the outside of the drain port 511, and one end of the drain pipe 53 is inserted into the elastic sealing ring 52.
[0033] The guide channel 51 is fixed to the inner side of the bottom of the guide housing 1, the inlet 511 is opened at the lowest point of the bottom of the guide channel 51, the elastic sealing ring 52 is tightly fitted on the outside of the inlet 511, and one end of the drain pipe 53 is inserted into the elastic sealing ring 52 to form a complete condensate discharge path. When the evaporator is working, it will produce condensate. Without the drainage component 5, the condensate will easily accumulate in the guide housing 1, leading to component corrosion or bacterial growth. In the traditional drainage structure, leakage is likely to occur at the connection between the drainage port 511 and the drain pipe 53, affecting the condensate drainage effect. The guide groove 51 is set on the inner side of the bottom, which can collect the condensate dripping from the evaporator and the guide component, preventing the condensate from flowing everywhere. The drainage port 511 is located at the lowest point of the bottom, ensuring that the condensate naturally gathers and flows out by gravity. The elastic sealing ring 52 can fill the gap between the drainage port 511 and the drain pipe 53, preventing condensate from leaking from the connection. At the same time, the elastic material can adapt to the vibration during vehicle operation, preventing the connection from loosening due to vibration, ensuring that the condensate is stably discharged to the outside of the vehicle, and protecting the internal components of the guide housing 1 from condensate corrosion.
[0034] The inner wall of the elastic sealing ring 52 is provided with an annular protrusion, which fits and adapts to the outer wall of the drainage port 511.
[0035] The annular protrusion on the inner wall of the elastic sealing ring 52 fits tightly against the outer wall of the drain port 511, forming multiple sealing contacts. The elastic sealing ring 52 is fixed to the drain port 511 by the extrusion deformation of the annular protrusion, while providing a sealing space for the insertion of the drain pipe 53. The sealing effect is limited by the side wall of the elastic sealing ring 52 fitting with the drain port 511. It is prone to failure due to vibration or aging. The annular protrusion can increase the sealing contact area and improve the sealing reliability. The fit between the annular protrusion and the outer wall of the drain port 511 forms multiple sealing defenses. Even if one annular protrusion is slightly worn, the other annular protrusions can still maintain the sealing effect, which greatly reduces the risk of condensate leakage. The compression deformation of the annular protrusion can also enhance the connection strength between the elastic sealing ring 52 and the drain port 511, prevent the elastic sealing ring 52 from falling off due to vehicle vibration, and ensure the long-term stability of the condensate discharge path.
[0036] The bottom of the flow guide 51 is an inclined surface, which slopes from the other end of the flow guide housing 1 toward the flow inlet 511. The flow guide 51 and the flow guide housing 1 are an integral structure. The inner wall of the flow guide 51 is provided with a coating, which covers the inner surface of the flow guide 51.
[0037] The flow guide groove 51 is integrally formed with the flow guide shell 1 without any splicing gaps; the bottom inclined surface slopes from the end of the flow guide shell 1 away from the flow outlet 511 towards the flow outlet 511; the coating is evenly covered on the entire inner surface of the flow guide groove 51, including the inclined surface and the area around the flow outlet 511. If the bottom of the guide channel 51 is flat, condensate is prone to accumulate locally and cannot flow smoothly to the inlet 511. The non-integrated structure with the guide housing 1 is prone to splicing gaps, causing condensate to leak from the gaps. The lack of coating on the inner wall makes it easy for bacteria to grow or for corrosion to occur, affecting the service life of the guide channel 51. The design of the inclined bottom surface uses gravity to guide the condensate to flow to the inlet 511, avoiding the accumulation of condensate in the guide channel 51, reducing the risk of bacterial growth and component corrosion. The integrated structure eliminates splicing gaps and completely eliminates the problem of condensate leakage from the gaps. The inner wall coating can improve the corrosion resistance of the guide channel 51 and extend its service life. At the same time, the smooth surface of the coating can reduce the adhesion of condensate to the tank wall, accelerate the flow of condensate, and improve the discharge efficiency.
[0038] The top of the flow guide housing 1 is provided with a positioning pin 6, which extends along the height direction of the flow guide housing 1 and is an integral structure with the flow guide housing 1.
[0039] The positioning pin 6 is integrally formed with the flow guide housing 1, and extends outward from the top of the flow guide housing 1. The extension direction is consistent with the height direction of the flow guide housing 1, and it can be matched with the corresponding positioning hole of the evaporator or the vehicle body. During installation, the air guide housing 1 needs to be precisely aligned with components such as the evaporator. Without a positioning structure, installation deviations are prone to occur, leading to misalignment of the airflow channel or sealing failure. The positioning pin 6, which is not an integrated structure, is prone to falling off during installation or use, thus losing its positioning function. The positioning pin 6 provides precise positioning for the air guide housing 1 during installation, ensuring accurate alignment between the air guide housing 1 and the evaporator. This prevents airflow from being unable to enter the evaporator smoothly or causing air leakage due to installation deviations. The integrated structure ensures the connection strength of the positioning pin 6, preventing it from falling off during use and maintaining the positioning effect over a long period. At the same time, it simplifies the installation process and improves installation efficiency.
[0040] In summary, the working principle of the automotive air conditioning evaporator air guiding device provided by this utility model embodiment is as follows: First, the positioning pin 6 integrally formed on the top of the air guiding housing 1 cooperates with the corresponding positioning hole of the evaporator or the vehicle body to achieve precise installation of the air guiding housing 1, ensuring that its open end is precisely aligned with the air inlet side of the evaporator core, avoiding misalignment or air leakage of the airflow channel; then, the airflow delivered by the fan enters the air guiding housing 1 near the closed end, first contacting the main flow plate 2, which is inclined in shape and whose two side edges are fixedly connected to the inner wall of the air guiding housing 1, and the airflow passes through the upper edge of the main flow plate 2. After being evenly divided by the guide holes 21 distributed in the width direction, the airflow flows at a gentle angle to the secondary guide plate 4 located between the main guide plate 2 and the guide rib group 3. The secondary guide plate 4 is arc-shaped and hollow. Several arc-shaped main ribs 41 extending along the width direction of the guide shell 1 and several vertical secondary ribs 42 extending along the height direction are interwoven to form a hollow structure. When the airflow passes smoothly through the hollow structure, it is gathered and guided by the concave surface of the arc-shaped main ribs 41, and divided into multiple uniform airflows in the height direction. Then, it is further divided in the width direction by the vertical secondary ribs 42, and then accurately transmitted to the secondary guide plate. The guide rib group 3 is connected to the side of plate 4 away from the main flow plate 2. Several guide ribs 31 of the guide rib group 3 are distributed at intervals along the width direction of the guide shell 1, and their lengths gradually change from long at the top to short at the bottom along the height direction. After the airflow contacts the arc-shaped windward surface 32 of the guide rib 31 near the end of the secondary guide plate 4, it smoothly enters and is divided into multiple airflows adapted to the heat exchange requirements of the evaporator core in the height direction. Then, guided by the tapered pointed structure at the other end of the guide rib 31, it flows precisely to the heat exchange area corresponding to the evaporator core to complete the heat exchange. At the same time, the condensate water generated during the operation of the evaporator drips down. The condensate flows into the guide channel 51, which is integrally formed with the bottom of the guide housing 1. Because the bottom of the guide channel 51 is an inclined surface that slopes from the end away from the inlet 511 towards the inlet 511, the condensate naturally gathers to the inlet 511 under the action of gravity. Then, it flows steadily into the drain pipe 53 inserted into the sealing ring through the elastic sealing ring 52 fitted on the outside of the inlet 511 and is discharged to the outside of the vehicle. The coating on the inner wall of the guide channel 51 prevents the condensate from accumulating in the channel and breeding bacteria or causing corrosion of the channel body. Ultimately, it achieves the dual functions of uniform airflow distribution and heat exchange and reliable discharge of condensate.
[0041] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.
Claims
1. A flow guiding device for an automotive air conditioning evaporator, comprising a flow guiding shell (1), a main flow plate (2), and a flow guiding rib assembly (3), wherein the flow guiding shell (1) is a box structure with one open end, the main flow plate (2) is disposed inside the flow guiding shell (1) near its closed end, and the flow guiding rib assembly (3) is disposed inside the flow guiding shell (1) near its open end, characterized in that: The flow guide shell (1) is also provided with a secondary flow guide plate (4), which is located between the main flow guide plate (2) and the flow guide rib group (3). The secondary flow guide plate (4) is arc-shaped and hollow. The secondary guide plate (4) includes an arc-shaped main rib (41) and a vertical secondary rib (42). The arc-shaped main rib (41) extends along the width direction of the guide shell (1), and the vertical secondary rib (42) extends along the height direction of the guide shell (1). The arc-shaped main rib (41) and the vertical secondary rib (42) are interlocked to form a hollow structure. The guide rib group (3) is connected to the side of the secondary guide plate (4) away from the main guide plate (2).
2. The automotive air conditioning evaporator guide device according to claim 1, characterized in that: The concave surface of the arc-shaped main rib (41) faces the main flow plate (2). There are several arc-shaped main ribs (41), and the arc-shaped main ribs (41) are distributed at intervals along the height direction of the flow guide shell (1).
3. The automotive air conditioning evaporator guide device according to claim 1, characterized in that: The vertical secondary ribs (42) are provided in several ways and are distributed at intervals along the width direction of the flow guide shell (1). Both the arc-shaped main rib (41) and the vertical secondary ribs (42) are provided with connecting holes.
4. The automotive air conditioning evaporator guide device according to claim 3, characterized in that: The guide rib group (3) is divided into several guide ribs (31). Each guide rib (31) has a rounded windward surface (32) at one end near the secondary guide plate (4), and the other end is tapered.
5. The automotive air conditioning evaporator guide device according to claim 4, characterized in that: The guide ribs (31) are distributed at intervals along the width direction of the guide shell (1), and the length of the guide ribs (31) is gradually set along the height direction of the guide shell (1).
6. The automotive air conditioning evaporator guide device according to claim 1, characterized in that: The main flow plate (2) is fixedly installed in the flow guide housing (1) in an inclined manner. The main flow plate (2) has flow guide holes (21) which are distributed along the width direction of the main flow plate (2). The two sides of the main flow plate (2) are connected to the inner wall of the flow guide housing (1).
7. The automotive air conditioning evaporator guide device according to claim 1, characterized in that: The flow guide housing (1) is also provided with a flow diversion assembly (5), which includes a flow guide groove (51), an elastic sealing ring (52), and a drain pipe (53). The flow guide groove (51) is located on the bottom inner side of the flow guide housing (1), and the bottom of the flow guide groove (51) is provided with a flow outlet (511). The elastic sealing ring (52) is sleeved on the outside of the drain port (511), and one end of the drain pipe (53) is inserted into the elastic sealing ring (52).
8. The automotive air conditioning evaporator guide device according to claim 7, characterized in that: The inner wall of the elastic sealing ring (52) is provided with an annular protrusion, which is adapted to fit the outer wall of the drainage port (511).
9. The automotive air conditioning evaporator guide device according to claim 7, characterized in that: The bottom of the guide groove (51) is an inclined surface, which is inclined from the other end of the guide shell (1) towards the inlet. The guide groove (51) and the guide shell (1) are an integral structure. The inner wall of the guide groove (51) is provided with a coating, which covers the inner surface of the guide groove (51).
10. The automotive air conditioning evaporator guide device according to claim 1, characterized in that: The top of the flow guide housing (1) is provided with a positioning pin (6), which extends along the height direction of the flow guide housing (1) and the positioning pin (6) and the flow guide housing (1) are an integral structure.